FGFS-4.1/flightgear
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
67bebb4bc3
flightgear/3rdparty/mongoose/mongoose.c

5251 lines
161 KiB
C
Raw Normal View History

first commit
2022-10-20 20:29:11 +08:00
// Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
// Copyright (c) 2013-2014 Cesanta Software Limited
// All rights reserved
//
// This library is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this library under the terms of the GNU General
// Public License, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// Alternatively, you can license this library under a commercial
// license, as set out in <http://cesanta.com/>.
//
// $Date: 2014-09-16 06:47:40 UTC $
#ifdef NOEMBED_NET_SKELETON
#include "net_skeleton.h"
#else
// net_skeleton start
// Copyright (c) 2014 Cesanta Software Limited
// All rights reserved
//
// This software is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this software under the terms of the GNU General
// Public License, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// Alternatively, you can license this software under a commercial
// license, as set out in <http://cesanta.com/>.
//
// $Date: 2014-09-28 05:04:41 UTC $
#ifndef NS_SKELETON_HEADER_INCLUDED
#define NS_SKELETON_HEADER_INCLUDED
#define NS_SKELETON_VERSION "2.1.0"
#undef UNICODE // Use ANSI WinAPI functions
#undef _UNICODE // Use multibyte encoding on Windows
#define _MBCS // Use multibyte encoding on Windows
#define _INTEGRAL_MAX_BITS 64 // Enable _stati64() on Windows
#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005+
#undef WIN32_LEAN_AND_MEAN // Let windows.h always include winsock2.h
#define _XOPEN_SOURCE 600 // For flockfile() on Linux
#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX
#ifndef _LARGEFILE_SOURCE
#define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions
#endif
#define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets
#ifdef _MSC_VER
#pragma warning (disable : 4127) // FD_SET() emits warning, disable it
#pragma warning (disable : 4204) // missing c99 support
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#ifdef _WIN32
#ifdef _MSC_VER
#pragma comment(lib, "ws2_32.lib") // Linking with winsock library
#endif
#include <windows.h>
#include <process.h>
#ifndef EINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#ifndef __func__
#define STRX(x) #x
#define STR(x) STRX(x)
#define __func__ __FILE__ ":" STR(__LINE__)
#endif
#ifndef va_copy
#define va_copy(x,y) x = y
#endif // MINGW #defines va_copy
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#define sleep(x) Sleep((x) * 1000)
#define to64(x) _atoi64(x)
typedef int socklen_t;
typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
typedef unsigned short uint16_t;
typedef unsigned __int64 uint64_t;
typedef __int64 int64_t;
typedef SOCKET sock_t;
typedef struct _stati64 ns_stat_t;
#ifndef S_ISDIR
#define S_ISDIR(x) ((x) & _S_IFDIR)
#endif
#else
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <pthread.h>
#include <stdarg.h>
#include <unistd.h>
#include <arpa/inet.h> // For inet_pton() when NS_ENABLE_IPV6 is defined
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/select.h>
#define closesocket(x) close(x)
#define __cdecl
#define INVALID_SOCKET (-1)
#define to64(x) strtoll(x, NULL, 10)
typedef int sock_t;
typedef struct stat ns_stat_t;
#endif
#ifdef NS_ENABLE_DEBUG
#define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \
fflush(stdout); } while(0)
#else
#define DBG(x)
#endif
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
#endif
#ifdef NS_ENABLE_SSL
#ifdef __APPLE__
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#include <openssl/ssl.h>
#else
typedef void *SSL;
typedef void *SSL_CTX;
#endif
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
union socket_address {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef NS_ENABLE_IPV6
struct sockaddr_in6 sin6;
#else
struct sockaddr sin6;
#endif
};
// Describes chunk of memory
struct ns_str {
const char *p;
size_t len;
};
// IO buffers interface
struct iobuf {
char *buf;
size_t len;
size_t size;
};
void iobuf_init(struct iobuf *, size_t initial_size);
void iobuf_free(struct iobuf *);
size_t iobuf_append(struct iobuf *, const void *data, size_t data_size);
void iobuf_remove(struct iobuf *, size_t data_size);
void iobuf_resize(struct iobuf *, size_t new_size);
// Callback function (event handler) prototype, must be defined by user.
// Net skeleton will call event handler, passing events defined above.
struct ns_connection;
typedef void (*ns_callback_t)(struct ns_connection *, int event_num, void *evp);
// Events. Meaning of event parameter (evp) is given in the comment.
#define NS_POLL 0 // Sent to each connection on each call to ns_mgr_poll()
#define NS_ACCEPT 1 // New connection accept()-ed. union socket_address *addr
#define NS_CONNECT 2 // connect() succeeded or failed. int *success_status
#define NS_RECV 3 // Data has benn received. int *num_bytes
#define NS_SEND 4 // Data has been written to a socket. int *num_bytes
#define NS_CLOSE 5 // Connection is closed. NULL
struct ns_mgr {
struct ns_connection *active_connections;
const char *hexdump_file; // Debug hexdump file path
sock_t ctl[2]; // Socketpair for mg_wakeup()
void *user_data; // User data
};
struct ns_connection {
struct ns_connection *next, *prev; // ns_mgr::active_connections linkage
struct ns_connection *listener; // Set only for accept()-ed connections
struct ns_mgr *mgr;
sock_t sock; // Socket
union socket_address sa; // Peer address
struct iobuf recv_iobuf; // Received data
struct iobuf send_iobuf; // Data scheduled for sending
SSL *ssl;
SSL_CTX *ssl_ctx;
void *user_data; // User-specific data
void *proto_data; // Application protocol-specific data
time_t last_io_time; // Timestamp of the last socket IO
ns_callback_t callback; // Event handler function
unsigned int flags;
#define NSF_FINISHED_SENDING_DATA (1 << 0)
#define NSF_BUFFER_BUT_DONT_SEND (1 << 1)
#define NSF_SSL_HANDSHAKE_DONE (1 << 2)
#define NSF_CONNECTING (1 << 3)
#define NSF_CLOSE_IMMEDIATELY (1 << 4)
#define NSF_WANT_READ (1 << 5)
#define NSF_WANT_WRITE (1 << 6)
#define NSF_LISTENING (1 << 7)
#define NSF_UDP (1 << 8)
#define NSF_USER_1 (1 << 20)
#define NSF_USER_2 (1 << 21)
#define NSF_USER_3 (1 << 22)
#define NSF_USER_4 (1 << 23)
#define NSF_USER_5 (1 << 24)
#define NSF_USER_6 (1 << 25)
};
void ns_mgr_init(struct ns_mgr *, void *user_data);
void ns_mgr_free(struct ns_mgr *);
time_t ns_mgr_poll(struct ns_mgr *, int milli);
void ns_broadcast(struct ns_mgr *, ns_callback_t, void *, size_t);
struct ns_connection *ns_next(struct ns_mgr *, struct ns_connection *);
struct ns_connection *ns_add_sock(struct ns_mgr *, sock_t,
ns_callback_t, void *);
struct ns_connection *ns_bind(struct ns_mgr *, const char *,
ns_callback_t, void *);
struct ns_connection *ns_connect(struct ns_mgr *, const char *,
ns_callback_t, void *);
int ns_send(struct ns_connection *, const void *buf, int len);
int ns_printf(struct ns_connection *, const char *fmt, ...);
int ns_vprintf(struct ns_connection *, const char *fmt, va_list ap);
// Utility functions
void *ns_start_thread(void *(*f)(void *), void *p);
int ns_socketpair(sock_t [2]);
int ns_socketpair2(sock_t [2], int sock_type); // SOCK_STREAM or SOCK_DGRAM
void ns_set_close_on_exec(sock_t);
void ns_sock_to_str(sock_t sock, char *buf, size_t len, int flags);
int ns_hexdump(const void *buf, int len, char *dst, int dst_len);
int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap);
int ns_resolve(const char *domain_name, char *ip_addr_buf, size_t buf_len);
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // NS_SKELETON_HEADER_INCLUDED
// Copyright (c) 2014 Cesanta Software Limited
// All rights reserved
//
// This software is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this software under the terms of the GNU General
// Public License, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// Alternatively, you can license this software under a commercial
// license, as set out in <http://cesanta.com/>.
//
// $Date: 2014-09-28 05:04:41 UTC $
#ifndef NS_MALLOC
#define NS_MALLOC malloc
#endif
#ifndef NS_REALLOC
#define NS_REALLOC realloc
#endif
#ifndef NS_FREE
#define NS_FREE free
#endif
#define NS_UDP_RECEIVE_BUFFER_SIZE 2000
#define NS_VPRINTF_BUFFER_SIZE 500
struct ctl_msg {
ns_callback_t callback;
char message[1024 * 8];
};
void iobuf_resize(struct iobuf *io, size_t new_size) {
char *p;
if ((new_size > io->size || (new_size < io->size && new_size >= io->len)) &&
(p = (char *) NS_REALLOC(io->buf, new_size)) != NULL) {
io->size = new_size;
io->buf = p;
}
}
void iobuf_init(struct iobuf *iobuf, size_t initial_size) {
iobuf->len = iobuf->size = 0;
iobuf->buf = NULL;
iobuf_resize(iobuf, initial_size);
}
void iobuf_free(struct iobuf *iobuf) {
if (iobuf != NULL) {
if (iobuf->buf != NULL) NS_FREE(iobuf->buf);
iobuf_init(iobuf, 0);
}
}
size_t iobuf_append(struct iobuf *io, const void *buf, size_t len) {
char *p = NULL;
assert(io != NULL);
assert(io->len <= io->size);
if (len <= 0) {
} else if (io->len + len <= io->size) {
memcpy(io->buf + io->len, buf, len);
io->len += len;
} else if ((p = (char *) NS_REALLOC(io->buf, io->len + len)) != NULL) {
io->buf = p;
memcpy(io->buf + io->len, buf, len);
io->len += len;
io->size = io->len;
} else {
len = 0;
}
return len;
}
void iobuf_remove(struct iobuf *io, size_t n) {
if (n > 0 && n <= io->len) {
memmove(io->buf, io->buf + n, io->len - n);
io->len -= n;
}
}
static size_t ns_out(struct ns_connection *nc, const void *buf, size_t len) {
if (nc->flags & NSF_UDP) {
long n = sendto(nc->sock, buf, len, 0, &nc->sa.sa, sizeof(nc->sa.sin));
DBG(("%p %d send %ld (%d %s)", nc, nc->sock, n, errno, strerror(errno)));
return n < 0 ? 0 : n;
} else {
return iobuf_append(&nc->send_iobuf, buf, len);
}
}
#ifndef NS_DISABLE_THREADS
void *ns_start_thread(void *(*f)(void *), void *p) {
#ifdef _WIN32
return (void *) _beginthread((void (__cdecl *)(void *)) f, 0, p);
#else
pthread_t thread_id = (pthread_t) 0;
pthread_attr_t attr;
(void) pthread_attr_init(&attr);
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
#if defined(NS_STACK_SIZE) && NS_STACK_SIZE > 1
(void) pthread_attr_setstacksize(&attr, NS_STACK_SIZE);
#endif
pthread_create(&thread_id, &attr, f, p);
pthread_attr_destroy(&attr);
return (void *) thread_id;
#endif
}
#endif // NS_DISABLE_THREADS
static void ns_add_conn(struct ns_mgr *mgr, struct ns_connection *c) {
c->next = mgr->active_connections;
mgr->active_connections = c;
c->prev = NULL;
if (c->next != NULL) c->next->prev = c;
}
static void ns_remove_conn(struct ns_connection *conn) {
if (conn->prev == NULL) conn->mgr->active_connections = conn->next;
if (conn->prev) conn->prev->next = conn->next;
if (conn->next) conn->next->prev = conn->prev;
}
// Print message to buffer. If buffer is large enough to hold the message,
// return buffer. If buffer is to small, allocate large enough buffer on heap,
// and return allocated buffer.
int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap) {
va_list ap_copy;
int len;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
if (len < 0) {
// eCos and Windows are not standard-compliant and return -1 when
// the buffer is too small. Keep allocating larger buffers until we
// succeed or out of memory.
*buf = NULL;
while (len < 0) {
if (*buf) free(*buf);
size *= 2;
if ((*buf = (char *) NS_MALLOC(size)) == NULL) break;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
}
} else if (len > (int) size) {
// Standard-compliant code path. Allocate a buffer that is large enough.
if ((*buf = (char *) NS_MALLOC(len + 1)) == NULL) {
len = -1;
} else {
va_copy(ap_copy, ap);
len = vsnprintf(*buf, len + 1, fmt, ap_copy);
va_end(ap_copy);
}
}
return len;
}
int ns_vprintf(struct ns_connection *nc, const char *fmt, va_list ap) {
char mem[NS_VPRINTF_BUFFER_SIZE], *buf = mem;
int len;
if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
ns_out(nc, buf, len);
}
if (buf != mem && buf != NULL) {
free(buf);
}
return len;
}
int ns_printf(struct ns_connection *conn, const char *fmt, ...) {
int len;
va_list ap;
va_start(ap, fmt);
len = ns_vprintf(conn, fmt, ap);
va_end(ap);
return len;
}
static void hexdump(struct ns_connection *nc, const char *path,
int num_bytes, int ev) {
const struct iobuf *io = ev == NS_SEND ? &nc->send_iobuf : &nc->recv_iobuf;
FILE *fp;
char *buf, src[60], dst[60];
int buf_size = num_bytes * 5 + 100;
if ((fp = fopen(path, "a")) != NULL) {
ns_sock_to_str(nc->sock, src, sizeof(src), 3);
ns_sock_to_str(nc->sock, dst, sizeof(dst), 7);
fprintf(fp, "%lu %p %s %s %s %d\n", (unsigned long) time(NULL),
nc->user_data, src,
ev == NS_RECV ? "<-" : ev == NS_SEND ? "->" :
ev == NS_ACCEPT ? "<A" : ev == NS_CONNECT ? "C>" : "XX",
dst, num_bytes);
if (num_bytes > 0 && (buf = (char *) NS_MALLOC(buf_size)) != NULL) {
ns_hexdump(io->buf + (ev == NS_SEND ? 0 : io->len) -
(ev == NS_SEND ? 0 : num_bytes), num_bytes, buf, buf_size);
fprintf(fp, "%s", buf);
free(buf);
}
fclose(fp);
}
}
static void ns_call(struct ns_connection *nc, int ev, void *p) {
if (nc->mgr->hexdump_file != NULL && ev != NS_POLL) {
int len = (ev == NS_RECV || ev == NS_SEND) ? * (int *) p : 0;
hexdump(nc, nc->mgr->hexdump_file, len, ev);
}
nc->callback(nc, ev, p);
}
static void ns_destroy_conn(struct ns_connection *conn) {
closesocket(conn->sock);
iobuf_free(&conn->recv_iobuf);
iobuf_free(&conn->send_iobuf);
#ifdef NS_ENABLE_SSL
if (conn->ssl != NULL) {
SSL_free(conn->ssl);
}
if (conn->ssl_ctx != NULL) {
SSL_CTX_free(conn->ssl_ctx);
}
#endif
NS_FREE(conn);
}
static void ns_close_conn(struct ns_connection *conn) {
DBG(("%p %d", conn, conn->flags));
ns_call(conn, NS_CLOSE, NULL);
ns_remove_conn(conn);
ns_destroy_conn(conn);
}
void ns_set_close_on_exec(sock_t sock) {
#ifdef _WIN32
(void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0);
#else
fcntl(sock, F_SETFD, FD_CLOEXEC);
#endif
}
static void ns_set_non_blocking_mode(sock_t sock) {
#ifdef _WIN32
unsigned long on = 1;
ioctlsocket(sock, FIONBIO, &on);
#else
int flags = fcntl(sock, F_GETFL, 0);
fcntl(sock, F_SETFL, flags | O_NONBLOCK);
#endif
}
#ifndef NS_DISABLE_SOCKETPAIR
int ns_socketpair2(sock_t sp[2], int sock_type) {
union socket_address sa;
sock_t sock;
socklen_t len = sizeof(sa.sin);
int ret = 0;
sp[0] = sp[1] = INVALID_SOCKET;
(void) memset(&sa, 0, sizeof(sa));
sa.sin.sin_family = AF_INET;
sa.sin.sin_port = htons(0);
sa.sin.sin_addr.s_addr = htonl(0x7f000001);
if ((sock = socket(AF_INET, sock_type, 0)) != INVALID_SOCKET &&
!bind(sock, &sa.sa, len) &&
(sock_type == SOCK_DGRAM || !listen(sock, 1)) &&
!getsockname(sock, &sa.sa, &len) &&
(sp[0] = socket(AF_INET, sock_type, 0)) != INVALID_SOCKET &&
!connect(sp[0], &sa.sa, len) &&
(sock_type == SOCK_STREAM ||
(!getsockname(sp[0], &sa.sa, &len) && !connect(sock, &sa.sa, len))) &&
(sp[1] = (sock_type == SOCK_DGRAM ? sock :
accept(sock, &sa.sa, &len))) != INVALID_SOCKET) {
ns_set_close_on_exec(sp[0]);
ns_set_close_on_exec(sp[1]);
ret = 1;
} else {
if (sp[0] != INVALID_SOCKET) closesocket(sp[0]);
if (sp[1] != INVALID_SOCKET) closesocket(sp[1]);
sp[0] = sp[1] = INVALID_SOCKET;
}
if (sock_type != SOCK_DGRAM) closesocket(sock);
return ret;
}
int ns_socketpair(sock_t sp[2]) {
return ns_socketpair2(sp, SOCK_STREAM);
}
#endif // NS_DISABLE_SOCKETPAIR
// TODO(lsm): use non-blocking resolver
static int ns_resolve2(const char *host, struct in_addr *ina) {
struct hostent *he;
if ((he = gethostbyname(host)) == NULL) {
DBG(("gethostbyname(%s) failed: %s", host, strerror(errno)));
} else {
memcpy(ina, he->h_addr_list[0], sizeof(*ina));
return 1;
}
return 0;
}
// Resolve FDQN "host", store IP address in the "ip".
// Return > 0 (IP address length) on success.
int ns_resolve(const char *host, char *buf, size_t n) {
struct in_addr ad;
return ns_resolve2(host, &ad) ? snprintf(buf, n, "%s", inet_ntoa(ad)) : 0;
}
// Address format: [PROTO://][IP_ADDRESS:]PORT[:CERT][:CA_CERT]
static int ns_parse_address(const char *str, union socket_address *sa,
int *proto, int *use_ssl, char *cert, char *ca) {
unsigned int a, b, c, d, port;
int n = 0, len = 0;
char host[200];
#ifdef NS_ENABLE_IPV6
char buf[100];
#endif
// MacOS needs that. If we do not zero it, subsequent bind() will fail.
// Also, all-zeroes in the socket address means binding to all addresses
// for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
memset(sa, 0, sizeof(*sa));
sa->sin.sin_family = AF_INET;
*proto = SOCK_STREAM;
*use_ssl = 0;
cert[0] = ca[0] = '\0';
if (memcmp(str, "ssl://", 6) == 0) {
str += 6;
*use_ssl = 1;
} else if (memcmp(str, "udp://", 6) == 0) {
str += 6;
*proto = SOCK_DGRAM;
} else if (memcmp(str, "tcp://", 6) == 0) {
str += 6;
}
if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) {
// Bind to a specific IPv4 address, e.g. 192.168.1.5:8080
sa->sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
sa->sin.sin_port = htons((uint16_t) port);
#ifdef NS_ENABLE_IPV6
} else if (sscanf(str, "[%99[^]]]:%u%n", buf, &port, &len) == 2 &&
inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) {
// IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080
sa->sin6.sin6_family = AF_INET6;
sa->sin6.sin6_port = htons((uint16_t) port);
#endif
} else if (sscanf(str, "%199[^ :]:%u%n", host, &port, &len) == 2) {
sa->sin.sin_port = htons((uint16_t) port);
ns_resolve2(host, &sa->sin.sin_addr);
} else if (sscanf(str, "%u%n", &port, &len) == 1) {
// If only port is specified, bind to IPv4, INADDR_ANY
sa->sin.sin_port = htons((uint16_t) port);
}
if (*use_ssl && (sscanf(str + len, ":%99[^:]:%99[^:]%n", cert, ca, &n) == 2 ||
sscanf(str + len, ":%99[^:]%n", cert, &n) == 1)) {
len += n;
}
return port < 0xffff && str[len] == '\0' ? len : 0;
}
// 'sa' must be an initialized address to bind to
static sock_t ns_open_listening_socket(union socket_address *sa, int proto) {
socklen_t sa_len = (sa->sa.sa_family == AF_INET) ?
sizeof(sa->sin) : sizeof(sa->sin6);
sock_t sock = INVALID_SOCKET;
#ifndef _WIN32
int on = 1;
#endif
if ((sock = socket(sa->sa.sa_family, proto, 0)) != INVALID_SOCKET &&
#ifndef _WIN32
// SO_RESUSEADDR is not enabled on Windows because the semantics of
// SO_REUSEADDR on UNIX and Windows is different. On Windows,
// SO_REUSEADDR allows to bind a socket to a port without error even if
// the port is already open by another program. This is not the behavior
// SO_REUSEADDR was designed for, and leads to hard-to-track failure
// scenarios. Therefore, SO_REUSEADDR was disabled on Windows.
!setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) &&
#endif
!bind(sock, &sa->sa, sa_len) &&
(proto == SOCK_DGRAM || listen(sock, SOMAXCONN) == 0)) {
ns_set_non_blocking_mode(sock);
// In case port was set to 0, get the real port number
(void) getsockname(sock, &sa->sa, &sa_len);
} else if (sock != INVALID_SOCKET) {
closesocket(sock);
sock = INVALID_SOCKET;
}
return sock;
}
#ifdef NS_ENABLE_SSL
// Certificate generation script is at
// https://github.com/cesanta/net_skeleton/blob/master/scripts/gen_certs.sh
static int ns_use_ca_cert(SSL_CTX *ctx, const char *cert) {
if (ctx == NULL) {
return -1;
} else if (cert == NULL || cert[0] == '\0') {
return 0;
}
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0);
return SSL_CTX_load_verify_locations(ctx, cert, NULL) == 1 ? 0 : -2;
}
static int ns_use_cert(SSL_CTX *ctx, const char *pem_file) {
if (ctx == NULL) {
return -1;
} else if (pem_file == NULL || pem_file[0] == '\0') {
return 0;
} else if (SSL_CTX_use_certificate_file(ctx, pem_file, 1) == 0 ||
SSL_CTX_use_PrivateKey_file(ctx, pem_file, 1) == 0) {
return -2;
} else {
SSL_CTX_set_mode(ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
SSL_CTX_use_certificate_chain_file(ctx, pem_file);
return 0;
}
}
#endif // NS_ENABLE_SSL
struct ns_connection *ns_bind(struct ns_mgr *srv, const char *str,
ns_callback_t callback, void *user_data) {
union socket_address sa;
struct ns_connection *nc = NULL;
int use_ssl, proto;
char cert[100], ca_cert[100];
sock_t sock;
ns_parse_address(str, &sa, &proto, &use_ssl, cert, ca_cert);
if (use_ssl && cert[0] == '\0') return NULL;
if ((sock = ns_open_listening_socket(&sa, proto)) == INVALID_SOCKET) {
} else if ((nc = ns_add_sock(srv, sock, callback, NULL)) == NULL) {
closesocket(sock);
} else {
nc->sa = sa;
nc->flags |= NSF_LISTENING;
nc->user_data = user_data;
nc->callback = callback;
if (proto == SOCK_DGRAM) {
nc->flags |= NSF_UDP;
}
#ifdef NS_ENABLE_SSL
if (use_ssl) {
nc->ssl_ctx = SSL_CTX_new(SSLv23_server_method());
if (ns_use_cert(nc->ssl_ctx, cert) != 0 ||
ns_use_ca_cert(nc->ssl_ctx, ca_cert) != 0) {
ns_close_conn(nc);
nc = NULL;
}
}
#endif
DBG(("%p sock %d/%d ssl %p %p", nc, sock, proto, nc->ssl_ctx, nc->ssl));
}
return nc;
}
static struct ns_connection *accept_conn(struct ns_connection *ls) {
struct ns_connection *c = NULL;
union socket_address sa;
socklen_t len = sizeof(sa);
sock_t sock = INVALID_SOCKET;
// NOTE(lsm): on Windows, sock is always > FD_SETSIZE
if ((sock = accept(ls->sock, &sa.sa, &len)) == INVALID_SOCKET) {
} else if ((c = ns_add_sock(ls->mgr, sock, ls->callback,
ls->user_data)) == NULL) {
closesocket(sock);
#ifdef NS_ENABLE_SSL
} else if (ls->ssl_ctx != NULL &&
((c->ssl = SSL_new(ls->ssl_ctx)) == NULL ||
SSL_set_fd(c->ssl, sock) != 1)) {
DBG(("SSL error"));
ns_close_conn(c);
c = NULL;
#endif
} else {
c->listener = ls;
c->proto_data = ls->proto_data;
ns_call(c, NS_ACCEPT, &sa);
DBG(("%p %d %p %p", c, c->sock, c->ssl_ctx, c->ssl));
}
return c;
}
static int ns_is_error(int n) {
return n == 0 ||
(n < 0 && errno != EINTR && errno != EINPROGRESS &&
errno != EAGAIN && errno != EWOULDBLOCK
#ifdef _WIN32
&& WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK
#endif
);
}
void ns_sock_to_str(sock_t sock, char *buf, size_t len, int flags) {
union socket_address sa;
socklen_t slen = sizeof(sa);
if (buf != NULL && len > 0) {
buf[0] = '\0';
memset(&sa, 0, sizeof(sa));
if (flags & 4) {
getpeername(sock, &sa.sa, &slen);
} else {
getsockname(sock, &sa.sa, &slen);
}
if (flags & 1) {
#if defined(NS_ENABLE_IPV6)
inet_ntop(sa.sa.sa_family, sa.sa.sa_family == AF_INET ?
(void *) &sa.sin.sin_addr :
(void *) &sa.sin6.sin6_addr, buf, len);
#elif defined(_WIN32)
// Only Windoze Vista (and newer) have inet_ntop()
strncpy(buf, inet_ntoa(sa.sin.sin_addr), len);
#else
inet_ntop(sa.sa.sa_family, (void *) &sa.sin.sin_addr, buf,(socklen_t)len);
#endif
}
if (flags & 2) {
snprintf(buf + strlen(buf), len - (strlen(buf) + 1), "%s%d",
flags & 1 ? ":" : "", (int) ntohs(sa.sin.sin_port));
}
}
}
int ns_hexdump(const void *buf, int len, char *dst, int dst_len) {
const unsigned char *p = (const unsigned char *) buf;
char ascii[17] = "";
int i, idx, n = 0;
for (i = 0; i < len; i++) {
idx = i % 16;
if (idx == 0) {
if (i > 0) n += snprintf(dst + n, dst_len - n, " %s\n", ascii);
n += snprintf(dst + n, dst_len - n, "%04x ", i);
}
n += snprintf(dst + n, dst_len - n, " %02x", p[i]);
ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i];
ascii[idx + 1] = '\0';
}
while (i++ % 16) n += snprintf(dst + n, dst_len - n, "%s", " ");
n += snprintf(dst + n, dst_len - n, " %s\n\n", ascii);
return n;
}
#ifdef NS_ENABLE_SSL
static int ns_ssl_err(struct ns_connection *conn, int res) {
int ssl_err = SSL_get_error(conn->ssl, res);
if (ssl_err == SSL_ERROR_WANT_READ) conn->flags |= NSF_WANT_READ;
if (ssl_err == SSL_ERROR_WANT_WRITE) conn->flags |= NSF_WANT_WRITE;
return ssl_err;
}
#endif
static void ns_read_from_socket(struct ns_connection *conn) {
char buf[2048];
int n = 0;
if (conn->flags & NSF_CONNECTING) {
int ok = 1, ret;
socklen_t len = sizeof(ok);
ret = getsockopt(conn->sock, SOL_SOCKET, SO_ERROR, (char *) &ok, &len);
(void) ret;
#ifdef NS_ENABLE_SSL
if (ret == 0 && ok == 0 && conn->ssl != NULL) {
int res = SSL_connect(conn->ssl);
int ssl_err = ns_ssl_err(conn, res);
if (res == 1) {
conn->flags |= NSF_SSL_HANDSHAKE_DONE;
} else if (ssl_err == SSL_ERROR_WANT_READ ||
ssl_err == SSL_ERROR_WANT_WRITE) {
return; // Call us again
} else {
ok = 1;
}
}
#endif
conn->flags &= ~NSF_CONNECTING;
DBG(("%p ok=%d", conn, ok));
if (ok != 0) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
ns_call(conn, NS_CONNECT, &ok);
return;
}
#ifdef NS_ENABLE_SSL
if (conn->ssl != NULL) {
if (conn->flags & NSF_SSL_HANDSHAKE_DONE) {
// SSL library may have more bytes ready to read then we ask to read.
// Therefore, read in a loop until we read everything. Without the loop,
// we skip to the next select() cycle which can just timeout.
while ((n = SSL_read(conn->ssl, buf, sizeof(buf))) > 0) {
DBG(("%p %d <- %d bytes (SSL)", conn, conn->flags, n));
iobuf_append(&conn->recv_iobuf, buf, n);
ns_call(conn, NS_RECV, &n);
}
ns_ssl_err(conn, n);
} else {
int res = SSL_accept(conn->ssl);
int ssl_err = ns_ssl_err(conn, res);
if (res == 1) {
conn->flags |= NSF_SSL_HANDSHAKE_DONE;
} else if (ssl_err == SSL_ERROR_WANT_READ ||
ssl_err == SSL_ERROR_WANT_WRITE) {
return; // Call us again
} else {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
return;
}
} else
#endif
{
while ((n = (int) recv(conn->sock, buf, sizeof(buf), 0)) > 0) {
DBG(("%p %d <- %d bytes (PLAIN)", conn, conn->flags, n));
iobuf_append(&conn->recv_iobuf, buf, n);
ns_call(conn, NS_RECV, &n);
}
}
if (ns_is_error(n)) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
}
static void ns_write_to_socket(struct ns_connection *conn) {
struct iobuf *io = &conn->send_iobuf;
int n = 0;
#ifdef NS_ENABLE_SSL
if (conn->ssl != NULL) {
n = SSL_write(conn->ssl, io->buf, io->len);
if (n <= 0) {
int ssl_err = ns_ssl_err(conn, n);
if (ssl_err == SSL_ERROR_WANT_READ || ssl_err == SSL_ERROR_WANT_WRITE) {
return; // Call us again
} else {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
}
} else
#endif
{ n = (int) send(conn->sock, io->buf, io->len, 0); }
DBG(("%p %d -> %d bytes", conn, conn->flags, n));
ns_call(conn, NS_SEND, &n);
if (ns_is_error(n)) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
} else if (n > 0) {
iobuf_remove(io, n);
}
}
int ns_send(struct ns_connection *conn, const void *buf, int len) {
return (int) ns_out(conn, buf, len);
}
static void ns_handle_udp(struct ns_connection *ls) {
struct ns_connection nc;
char buf[NS_UDP_RECEIVE_BUFFER_SIZE];
int n;
socklen_t s_len = sizeof(nc.sa);
memset(&nc, 0, sizeof(nc));
n = recvfrom(ls->sock, buf, sizeof(buf), 0, &nc.sa.sa, &s_len);
if (n <= 0) {
DBG(("%p recvfrom: %s", ls, strerror(errno)));
} else {
nc.mgr = ls->mgr;
nc.recv_iobuf.buf = buf;
nc.recv_iobuf.len = nc.recv_iobuf.size = n;
nc.sock = ls->sock;
nc.callback = ls->callback;
nc.user_data = ls->user_data;
nc.proto_data = ls->proto_data;
nc.mgr = ls->mgr;
nc.listener = ls;
nc.flags = NSF_UDP;
DBG(("%p %d bytes received", ls, n));
ns_call(&nc, NS_RECV, &n);
}
}
static void ns_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) {
if (sock != INVALID_SOCKET) {
FD_SET(sock, set);
if (*max_fd == INVALID_SOCKET || sock > *max_fd) {
*max_fd = sock;
}
}
}
time_t ns_mgr_poll(struct ns_mgr *mgr, int milli) {
struct ns_connection *conn, *tmp_conn;
struct timeval tv;
fd_set read_set, write_set;
sock_t max_fd = INVALID_SOCKET;
time_t current_time = time(NULL);
FD_ZERO(&read_set);
FD_ZERO(&write_set);
ns_add_to_set(mgr->ctl[1], &read_set, &max_fd);
for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
if (!(conn->flags & (NSF_LISTENING | NSF_CONNECTING))) {
ns_call(conn, NS_POLL, &current_time);
}
if (!(conn->flags & NSF_WANT_WRITE)) {
//DBG(("%p read_set", conn));
ns_add_to_set(conn->sock, &read_set, &max_fd);
}
if (((conn->flags & NSF_CONNECTING) && !(conn->flags & NSF_WANT_READ)) ||
(conn->send_iobuf.len > 0 && !(conn->flags & NSF_CONNECTING) &&
!(conn->flags & NSF_BUFFER_BUT_DONT_SEND))) {
//DBG(("%p write_set", conn));
ns_add_to_set(conn->sock, &write_set, &max_fd);
}
if (conn->flags & NSF_CLOSE_IMMEDIATELY) {
ns_close_conn(conn);
}
}
tv.tv_sec = milli / 1000;
tv.tv_usec = (milli % 1000) * 1000;
if (select((int) max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) {
// select() might have been waiting for a long time, reset current_time
// now to prevent last_io_time being set to the past.
current_time = time(NULL);
// Read wakeup messages
if (mgr->ctl[1] != INVALID_SOCKET &&
FD_ISSET(mgr->ctl[1], &read_set)) {
struct ctl_msg ctl_msg;
int len = (int) recv(mgr->ctl[1], (char *) &ctl_msg, sizeof(ctl_msg), 0);
send(mgr->ctl[1], ctl_msg.message, 1, 0);
if (len >= (int) sizeof(ctl_msg.callback) && ctl_msg.callback != NULL) {
struct ns_connection *c;
for (c = ns_next(mgr, NULL); c != NULL; c = ns_next(mgr, c)) {
ctl_msg.callback(c, NS_POLL, ctl_msg.message);
}
}
}
for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
if (FD_ISSET(conn->sock, &read_set)) {
if (conn->flags & NSF_LISTENING) {
if (conn->flags & NSF_UDP) {
ns_handle_udp(conn);
} else {
// We're not looping here, and accepting just one connection at
// a time. The reason is that eCos does not respect non-blocking
// flag on a listening socket and hangs in a loop.
accept_conn(conn);
}
} else {
conn->last_io_time = current_time;
ns_read_from_socket(conn);
}
}
if (FD_ISSET(conn->sock, &write_set)) {
if (conn->flags & NSF_CONNECTING) {
ns_read_from_socket(conn);
} else if (!(conn->flags & NSF_BUFFER_BUT_DONT_SEND)) {
conn->last_io_time = current_time;
ns_write_to_socket(conn);
}
}
}
}
for (conn = mgr->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
if ((conn->flags & NSF_CLOSE_IMMEDIATELY) ||
(conn->send_iobuf.len == 0 &&
(conn->flags & NSF_FINISHED_SENDING_DATA))) {
ns_close_conn(conn);
}
}
return current_time;
}
struct ns_connection *ns_connect(struct ns_mgr *mgr, const char *address,
ns_callback_t callback, void *user_data) {
sock_t sock = INVALID_SOCKET;
struct ns_connection *nc = NULL;
union socket_address sa;
char cert[100], ca_cert[100];
int rc, use_ssl, proto;
ns_parse_address(address, &sa, &proto, &use_ssl, cert, ca_cert);
if ((sock = socket(AF_INET, proto, 0)) == INVALID_SOCKET) {
return NULL;
}
ns_set_non_blocking_mode(sock);
rc = (proto == SOCK_DGRAM) ? 0 : connect(sock, &sa.sa, sizeof(sa.sin));
if (rc != 0 && ns_is_error(rc)) {
closesocket(sock);
return NULL;
} else if ((nc = ns_add_sock(mgr, sock, callback, user_data)) == NULL) {
closesocket(sock);
return NULL;
}
nc->sa = sa; // Important, cause UDP conns will use sendto()
nc->flags = (proto == SOCK_DGRAM) ? NSF_UDP : NSF_CONNECTING;
#ifdef NS_ENABLE_SSL
if (use_ssl) {
if ((nc->ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL ||
ns_use_cert(nc->ssl_ctx, cert) != 0 ||
ns_use_ca_cert(nc->ssl_ctx, ca_cert) != 0 ||
(nc->ssl = SSL_new(nc->ssl_ctx)) == NULL) {
ns_close_conn(nc);
return NULL;
} else {
SSL_set_fd(nc->ssl, sock);
}
}
#endif
return nc;
}
struct ns_connection *ns_add_sock(struct ns_mgr *s, sock_t sock,
ns_callback_t callback, void *user_data) {
struct ns_connection *conn;
if ((conn = (struct ns_connection *) NS_MALLOC(sizeof(*conn))) != NULL) {
memset(conn, 0, sizeof(*conn));
ns_set_non_blocking_mode(sock);
ns_set_close_on_exec(sock);
conn->sock = sock;
conn->user_data = user_data;
conn->callback = callback;
conn->mgr = s;
conn->last_io_time = time(NULL);
ns_add_conn(s, conn);
DBG(("%p %d", conn, sock));
}
return conn;
}
struct ns_connection *ns_next(struct ns_mgr *s, struct ns_connection *conn) {
return conn == NULL ? s->active_connections : conn->next;
}
void ns_broadcast(struct ns_mgr *mgr, ns_callback_t cb,void *data, size_t len) {
struct ctl_msg ctl_msg;
if (mgr->ctl[0] != INVALID_SOCKET && data != NULL &&
len < sizeof(ctl_msg.message)) {
ctl_msg.callback = cb;
memcpy(ctl_msg.message, data, len);
send(mgr->ctl[0], (char *) &ctl_msg,
offsetof(struct ctl_msg, message) + len, 0);
recv(mgr->ctl[0], (char *) &len, 1, 0);
}
}
void ns_mgr_init(struct ns_mgr *s, void *user_data) {
memset(s, 0, sizeof(*s));
s->ctl[0] = s->ctl[1] = INVALID_SOCKET;
s->user_data = user_data;
#ifdef _WIN32
{ WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); }
#else
// Ignore SIGPIPE signal, so if client cancels the request, it
// won't kill the whole process.
signal(SIGPIPE, SIG_IGN);
#endif
#ifndef NS_DISABLE_SOCKETPAIR
do {
ns_socketpair2(s->ctl, SOCK_DGRAM);
} while (s->ctl[0] == INVALID_SOCKET);
#endif
#ifdef NS_ENABLE_SSL
{static int init_done; if (!init_done) { SSL_library_init(); init_done++; }}
#endif
}
void ns_mgr_free(struct ns_mgr *s) {
struct ns_connection *conn, *tmp_conn;
DBG(("%p", s));
if (s == NULL) return;
// Do one last poll, see https://github.com/cesanta/mongoose/issues/286
ns_mgr_poll(s, 0);
if (s->ctl[0] != INVALID_SOCKET) closesocket(s->ctl[0]);
if (s->ctl[1] != INVALID_SOCKET) closesocket(s->ctl[1]);
s->ctl[0] = s->ctl[1] = INVALID_SOCKET;
for (conn = s->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
ns_close_conn(conn);
}
}
// net_skeleton end
#endif // NOEMBED_NET_SKELETON
#include <ctype.h>
#ifdef _WIN32 //////////////// Windows specific defines and includes
#include <io.h> // For _lseeki64
#include <direct.h> // For _mkdir
#ifndef S_ISDIR
#define S_ISDIR(x) ((x) & _S_IFDIR)
#endif
#ifdef stat
#undef stat
#endif
#ifdef lseek
#undef lseek
#endif
#ifdef popen
#undef popen
#endif
#ifdef pclose
#undef pclose
#endif
#define stat(x, y) mg_stat((x), (y))
#define fopen(x, y) mg_fopen((x), (y))
#define open(x, y, z) mg_open((x), (y), (z))
#define close(x) _close(x)
#define lseek(x, y, z) _lseeki64((x), (y), (z))
#define popen(x, y) _popen((x), (y))
#define pclose(x) _pclose(x)
#define mkdir(x, y) _mkdir(x)
#ifndef __func__
#define STRX(x) #x
#define STR(x) STRX(x)
#define __func__ __FILE__ ":" STR(__LINE__)
#endif
/* MINGW has adopted the MSVC formatting for 64-bit ints as of gcc 4.4 till 4.8*/
#if (defined(__MINGW32__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4 && __GNUC_MINOR__ < 8))) || defined(_MSC_VER)
#define INT64_FMT "I64d"
#else
#define INT64_FMT "lld"
#endif
#define flockfile(x) ((void) (x))
#define funlockfile(x) ((void) (x))
typedef struct _stati64 file_stat_t;
typedef HANDLE process_id_t;
#else ////////////// UNIX specific defines and includes
#include <dirent.h>
#include <dlfcn.h>
#include <inttypes.h>
#include <pwd.h>
#define O_BINARY 0
#define INT64_FMT PRId64
typedef struct stat file_stat_t;
typedef pid_t process_id_t;
#endif //////// End of platform-specific defines and includes
#include "mongoose.h"
#define MAX_REQUEST_SIZE 16384
#define IOBUF_SIZE 8192
#define MAX_PATH_SIZE 8192
#define DEFAULT_CGI_PATTERN "**.cgi$|**.pl$|**.php$"
#define CGI_ENVIRONMENT_SIZE 8192
#define MAX_CGI_ENVIR_VARS 64
#define ENV_EXPORT_TO_CGI "MONGOOSE_CGI"
#define PASSWORDS_FILE_NAME ".htpasswd"
#ifndef MONGOOSE_USE_WEBSOCKET_PING_INTERVAL
#define MONGOOSE_USE_WEBSOCKET_PING_INTERVAL 5
#endif
// Extra HTTP headers to send in every static file reply
#if !defined(MONGOOSE_USE_EXTRA_HTTP_HEADERS)
#define MONGOOSE_USE_EXTRA_HTTP_HEADERS ""
#endif
#ifndef MONGOOSE_POST_SIZE_LIMIT
#define MONGOOSE_POST_SIZE_LIMIT 0
#endif
#ifndef MONGOOSE_IDLE_TIMEOUT_SECONDS
#define MONGOOSE_IDLE_TIMEOUT_SECONDS 300
#endif
#ifdef NS_DISABLE_SOCKETPAIR
#define MONGOOSE_NO_CGI
#endif
#ifdef MONGOOSE_NO_FILESYSTEM
#define MONGOOSE_NO_AUTH
#define MONGOOSE_NO_CGI
#define MONGOOSE_NO_DAV
#define MONGOOSE_NO_DIRECTORY_LISTING
#define MONGOOSE_NO_LOGGING
#define MONGOOSE_NO_SSI
#define MONGOOSE_NO_DL
#endif
struct vec {
const char *ptr;
int len;
};
// For directory listing and WevDAV support
struct dir_entry {
struct connection *conn;
char *file_name;
file_stat_t st;
};
// NOTE(lsm): this enum shoulds be in sync with the config_options.
enum {
ACCESS_CONTROL_LIST,
#ifndef MONGOOSE_NO_FILESYSTEM
ACCESS_LOG_FILE,
#ifndef MONGOOSE_NO_AUTH
AUTH_DOMAIN,
#endif
#ifndef MONGOOSE_NO_CGI
CGI_INTERPRETER,
CGI_PATTERN,
#endif
DAV_AUTH_FILE,
DOCUMENT_ROOT,
#ifndef MONGOOSE_NO_DIRECTORY_LISTING
ENABLE_DIRECTORY_LISTING,
#endif
#endif
ENABLE_PROXY,
EXTRA_MIME_TYPES,
#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH)
GLOBAL_AUTH_FILE,
#endif
#ifndef MONGOOSE_NO_FILESYSTEM
HIDE_FILES_PATTERN,
HEXDUMP_FILE,
INDEX_FILES,
#endif
LISTENING_PORT,
#ifndef _WIN32
RUN_AS_USER,
#endif
#ifndef MONGOOSE_NO_SSI
SSI_PATTERN,
#endif
URL_REWRITES,
NUM_OPTIONS
};
static const char *static_config_options[] = {
"access_control_list", NULL,
#ifndef MONGOOSE_NO_FILESYSTEM
"access_log_file", NULL,
#ifndef MONGOOSE_NO_AUTH
"auth_domain", "mydomain.com",
#endif
#ifndef MONGOOSE_NO_CGI
"cgi_interpreter", NULL,
"cgi_pattern", DEFAULT_CGI_PATTERN,
#endif
"dav_auth_file", NULL,
"document_root", NULL,
#ifndef MONGOOSE_NO_DIRECTORY_LISTING
"enable_directory_listing", "yes",
#endif
#endif
"enable_proxy", NULL,
"extra_mime_types", NULL,
#if !defined(MONGOOSE_NO_FILESYSTEM) && !defined(MONGOOSE_NO_AUTH)
"global_auth_file", NULL,
#endif
#ifndef MONGOOSE_NO_FILESYSTEM
"hide_files_patterns", NULL,
"hexdump_file", NULL,
"index_files","index.html,index.htm,index.shtml,index.cgi,index.php",
#endif
"listening_port", NULL,
#ifndef _WIN32
"run_as_user", NULL,
#endif
#ifndef MONGOOSE_NO_SSI
"ssi_pattern", "**.shtml$|**.shtm$",
#endif
"url_rewrites", NULL,
NULL
};
struct mg_server {
struct ns_mgr ns_mgr;
union socket_address lsa; // Listening socket address
mg_handler_t event_handler;
char *config_options[NUM_OPTIONS];
};
// Local endpoint representation
union endpoint {
int fd; // Opened regular local file
struct ns_connection *nc; // CGI or proxy->target connection
};
enum endpoint_type {
EP_NONE, EP_FILE, EP_CGI, EP_USER, EP_PUT, EP_CLIENT, EP_PROXY
};
#define MG_HEADERS_SENT NSF_USER_1
#define MG_LONG_RUNNING NSF_USER_2
#define MG_CGI_CONN NSF_USER_3
#define MG_PROXY_CONN NSF_USER_4
#define MG_PROXY_DONT_PARSE NSF_USER_5
struct connection {
struct ns_connection *ns_conn; // NOTE(lsm): main.c depends on this order
struct mg_connection mg_conn;
struct mg_server *server;
union endpoint endpoint;
enum endpoint_type endpoint_type;
char *path_info;
char *request;
int64_t num_bytes_recv; // Total number of bytes received
int64_t cl; // Reply content length, for Range support
int request_len; // Request length, including last \r\n after last header
};
#define MG_CONN_2_CONN(c) ((struct connection *) ((char *) (c) - \
offsetof(struct connection, mg_conn)))
static void open_local_endpoint(struct connection *conn, int skip_user);
static void close_local_endpoint(struct connection *conn);
static void mg_ev_handler(struct ns_connection *nc, int ev, void *p);
static const struct {
const char *extension;
size_t ext_len;
const char *mime_type;
} static_builtin_mime_types[] = {
{".html", 5, "text/html"},
{".htm", 4, "text/html"},
{".shtm", 5, "text/html"},
{".shtml", 6, "text/html"},
{".css", 4, "text/css"},
{".js", 3, "application/x-javascript"},
{".ico", 4, "image/x-icon"},
{".gif", 4, "image/gif"},
{".jpg", 4, "image/jpeg"},
{".jpeg", 5, "image/jpeg"},
{".png", 4, "image/png"},
{".svg", 4, "image/svg+xml"},
{".txt", 4, "text/plain"},
{".torrent", 8, "application/x-bittorrent"},
{".wav", 4, "audio/x-wav"},
{".mp3", 4, "audio/x-mp3"},
{".mid", 4, "audio/mid"},
{".m3u", 4, "audio/x-mpegurl"},
{".ogg", 4, "application/ogg"},
{".ram", 4, "audio/x-pn-realaudio"},
{".xml", 4, "text/xml"},
{".json", 5, "application/json"},
{".xslt", 5, "application/xml"},
{".xsl", 4, "application/xml"},
{".ra", 3, "audio/x-pn-realaudio"},
{".doc", 4, "application/msword"},
{".exe", 4, "application/octet-stream"},
{".zip", 4, "application/x-zip-compressed"},
{".xls", 4, "application/excel"},
{".tgz", 4, "application/x-tar-gz"},
{".tar", 4, "application/x-tar"},
{".gz", 3, "application/x-gunzip"},
{".arj", 4, "application/x-arj-compressed"},
{".rar", 4, "application/x-rar-compressed"},
{".rtf", 4, "application/rtf"},
{".pdf", 4, "application/pdf"},
{".swf", 4, "application/x-shockwave-flash"},
{".mpg", 4, "video/mpeg"},
{".webm", 5, "video/webm"},
{".mpeg", 5, "video/mpeg"},
{".mov", 4, "video/quicktime"},
{".mp4", 4, "video/mp4"},
{".m4v", 4, "video/x-m4v"},
{".asf", 4, "video/x-ms-asf"},
{".avi", 4, "video/x-msvideo"},
{".bmp", 4, "image/bmp"},
{".ttf", 4, "application/x-font-ttf"},
{NULL, 0, NULL}
};
#ifndef MONGOOSE_NO_THREADS
void *mg_start_thread(void *(*f)(void *), void *p) {
return ns_start_thread(f, p);
}
#endif // MONGOOSE_NO_THREADS
#ifndef MONGOOSE_NO_MMAP
#ifdef _WIN32
static void *mmap(void *addr, int64_t len, int prot, int flags, int fd,
int offset) {
HANDLE fh = (HANDLE) _get_osfhandle(fd);
HANDLE mh = CreateFileMapping(fh, 0, PAGE_READONLY, 0, 0, 0);
void *p = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, (size_t) len);
CloseHandle(mh);
return p;
}
#define munmap(x, y) UnmapViewOfFile(x)
#define MAP_FAILED NULL
#define MAP_PRIVATE 0
#define PROT_READ 0
#else
#include <sys/mman.h>
#endif
void *mg_mmap(FILE *fp, size_t size) {
void *p = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fileno(fp), 0);
return p == MAP_FAILED ? NULL : p;
}
void mg_munmap(void *p, size_t size) {
munmap(p, size);
}
#endif // MONGOOSE_NO_MMAP
#if defined(_WIN32) && !defined(MONGOOSE_NO_FILESYSTEM)
// Encode 'path' which is assumed UTF-8 string, into UNICODE string.
// wbuf and wbuf_len is a target buffer and its length.
static void to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) {
char buf[MAX_PATH_SIZE * 2], buf2[MAX_PATH_SIZE * 2], *p;
strncpy(buf, path, sizeof(buf));
buf[sizeof(buf) - 1] = '\0';
// Trim trailing slashes. Leave backslash for paths like "X:\"
p = buf + strlen(buf) - 1;
while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0';
// Convert to Unicode and back. If doubly-converted string does not
// match the original, something is fishy, reject.
memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
NULL, NULL);
if (strcmp(buf, buf2) != 0) {
wbuf[0] = L'\0';
}
}
static int mg_stat(const char *path, file_stat_t *st) {
wchar_t wpath[MAX_PATH_SIZE];
to_wchar(path, wpath, ARRAY_SIZE(wpath));
DBG(("[%ls] -> %d", wpath, _wstati64(wpath, st)));
return _wstati64(wpath, st);
}
static FILE *mg_fopen(const char *path, const char *mode) {
wchar_t wpath[MAX_PATH_SIZE], wmode[10];
to_wchar(path, wpath, ARRAY_SIZE(wpath));
to_wchar(mode, wmode, ARRAY_SIZE(wmode));
return _wfopen(wpath, wmode);
}
static int mg_open(const char *path, int flag, int mode) {
wchar_t wpath[MAX_PATH_SIZE];
to_wchar(path, wpath, ARRAY_SIZE(wpath));
return _wopen(wpath, flag, mode);
}
#endif // _WIN32 && !MONGOOSE_NO_FILESYSTEM
// A helper function for traversing a comma separated list of values.
// It returns a list pointer shifted to the next value, or NULL if the end
// of the list found.
// Value is stored in val vector. If value has form "x=y", then eq_val
// vector is initialized to point to the "y" part, and val vector length
// is adjusted to point only to "x".
static const char *next_option(const char *list, struct vec *val,
struct vec *eq_val) {
if (list == NULL || *list == '\0') {
// End of the list
list = NULL;
} else {
val->ptr = list;
if ((list = strchr(val->ptr, ',')) != NULL) {
// Comma found. Store length and shift the list ptr
val->len = list - val->ptr;
list++;
} else {
// This value is the last one
list = val->ptr + strlen(val->ptr);
val->len = list - val->ptr;
}
if (eq_val != NULL) {
// Value has form "x=y", adjust pointers and lengths
// so that val points to "x", and eq_val points to "y".
eq_val->len = 0;
eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
if (eq_val->ptr != NULL) {
eq_val->ptr++; // Skip over '=' character
eq_val->len = val->ptr + val->len - eq_val->ptr;
val->len = (eq_val->ptr - val->ptr) - 1;
}
}
}
return list;
}
// Like snprintf(), but never returns negative value, or a value
// that is larger than a supplied buffer.
static int mg_vsnprintf(char *buf, size_t buflen, const char *fmt, va_list ap) {
int n;
if (buflen < 1) return 0;
n = vsnprintf(buf, buflen, fmt, ap);
if (n < 0) {
n = 0;
} else if (n >= (int) buflen) {
n = (int) buflen - 1;
}
buf[n] = '\0';
return n;
}
static int mg_snprintf(char *buf, size_t buflen, const char *fmt, ...) {
va_list ap;
int n;
va_start(ap, fmt);
n = mg_vsnprintf(buf, buflen, fmt, ap);
va_end(ap);
return n;
}
// Check whether full request is buffered. Return:
// -1 if request is malformed
// 0 if request is not yet fully buffered
// >0 actual request length, including last \r\n\r\n
static int get_request_len(const char *s, int buf_len) {
const unsigned char *buf = (unsigned char *) s;
int i;
for (i = 0; i < buf_len; i++) {
// Control characters are not allowed but >=128 are.
// Abort scan as soon as one malformed character is found.
if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) {
return -1;
} else if (buf[i] == '\n' && i + 1 < buf_len && buf[i + 1] == '\n') {
return i + 2;
} else if (buf[i] == '\n' && i + 2 < buf_len && buf[i + 1] == '\r' &&
buf[i + 2] == '\n') {
return i + 3;
}
}
return 0;
}
// Skip the characters until one of the delimiters characters found.
// 0-terminate resulting word. Skip the rest of the delimiters if any.
// Advance pointer to buffer to the next word. Return found 0-terminated word.
static char *skip(char **buf, const char *delimiters) {
char *p, *begin_word, *end_word, *end_delimiters;
begin_word = *buf;
end_word = begin_word + strcspn(begin_word, delimiters);
end_delimiters = end_word + strspn(end_word, delimiters);
for (p = end_word; p < end_delimiters; p++) {
*p = '\0';
}
*buf = end_delimiters;
return begin_word;
}
// Parse HTTP headers from the given buffer, advance buffer to the point
// where parsing stopped.
static void parse_http_headers(char **buf, struct mg_connection *ri) {
size_t i;
for (i = 0; i < ARRAY_SIZE(ri->http_headers); i++) {
ri->http_headers[i].name = skip(buf, ": ");
ri->http_headers[i].value = skip(buf, "\r\n");
if (ri->http_headers[i].name[0] == '\0')
break;
ri->num_headers = i + 1;
}
}
static const char *status_code_to_str(int status_code) {
switch (status_code) {
case 100: return "Continue";
case 101: return "Switching Protocols";
case 102: return "Processing";
case 200: return "OK";
case 201: return "Created";
case 202: return "Accepted";
case 203: return "Non-Authoritative Information";
case 204: return "No Content";
case 205: return "Reset Content";
case 206: return "Partial Content";
case 207: return "Multi-Status";
case 208: return "Already Reported";
case 226: return "IM Used";
case 300: return "Multiple Choices";
case 301: return "Moved Permanently";
case 302: return "Found";
case 303: return "See Other";
case 304: return "Not Modified";
case 305: return "Use Proxy";
case 306: return "Switch Proxy";
case 307: return "Temporary Redirect";
case 308: return "Permanent Redirect";
case 400: return "Bad Request";
case 401: return "Unauthorized";
case 402: return "Payment Required";
case 403: return "Forbidden";
case 404: return "Not Found";
case 405: return "Method Not Allowed";
case 406: return "Not Acceptable";
case 407: return "Proxy Authentication Required";
case 408: return "Request Timeout";
case 409: return "Conflict";
case 410: return "Gone";
case 411: return "Length Required";
case 412: return "Precondition Failed";
case 413: return "Payload Too Large";
case 414: return "URI Too Long";
case 415: return "Unsupported Media Type";
case 416: return "Requested Range Not Satisfiable";
case 417: return "Expectation Failed";
case 418: return "I\'m a teapot";
case 422: return "Unprocessable Entity";
case 423: return "Locked";
case 424: return "Failed Dependency";
case 426: return "Upgrade Required";
case 428: return "Precondition Required";
case 429: return "Too Many Requests";
case 431: return "Request Header Fields Too Large";
case 451: return "Unavailable For Legal Reasons";
case 500: return "Internal Server Error";
case 501: return "Not Implemented";
case 502: return "Bad Gateway";
case 503: return "Service Unavailable";
case 504: return "Gateway Timeout";
case 505: return "HTTP Version Not Supported";
case 506: return "Variant Also Negotiates";
case 507: return "Insufficient Storage";
case 508: return "Loop Detected";
case 510: return "Not Extended";
case 511: return "Network Authentication Required";
default: return "Server Error";
}
}
static int call_user(struct connection *conn, enum mg_event ev) {
return conn != NULL && conn->server != NULL &&
conn->server->event_handler != NULL ?
conn->server->event_handler(&conn->mg_conn, ev) : MG_FALSE;
}
static void send_http_error(struct connection *conn, int code,
const char *fmt, ...) {
const char *message = status_code_to_str(code);
const char *rewrites = conn->server->config_options[URL_REWRITES];
char headers[200], body[200];
struct vec a, b;
va_list ap;
int body_len, headers_len, match_code;
conn->mg_conn.status_code = code;
// Invoke error handler if it is set
if (call_user(conn, MG_HTTP_ERROR) == MG_TRUE) {
close_local_endpoint(conn);
return;
}
// Handle error code rewrites
while ((rewrites = next_option(rewrites, &a, &b)) != NULL) {
if ((match_code = atoi(a.ptr)) > 0 && match_code == code) {
struct mg_connection *c = &conn->mg_conn;
c->status_code = 302;
mg_printf(c, "HTTP/1.1 %d Moved\r\n"
"Location: %.*s?code=%d&orig_uri=%s&query_string=%s\r\n\r\n",
c->status_code, b.len, b.ptr, code, c->uri,
c->query_string == NULL ? "" : c->query_string);
close_local_endpoint(conn);
return;
}
}
body_len = mg_snprintf(body, sizeof(body), "%d %s\n", code, message);
if (fmt != NULL) {
va_start(ap, fmt);
body_len += mg_vsnprintf(body + body_len, sizeof(body) - body_len, fmt, ap);
va_end(ap);
}
if ((code >= 300 && code <= 399) || code == 204) {
// 3xx errors do not have body
body_len = 0;
}
headers_len = mg_snprintf(headers, sizeof(headers),
"HTTP/1.1 %d %s\r\nContent-Length: %d\r\n"
"Content-Type: text/plain\r\n\r\n",
code, message, body_len);
ns_send(conn->ns_conn, headers, headers_len);
ns_send(conn->ns_conn, body, body_len);
close_local_endpoint(conn); // This will write to the log file
}
static void write_chunk(struct connection *conn, const char *buf, int len) {
char chunk_size[50];
int n = mg_snprintf(chunk_size, sizeof(chunk_size), "%X\r\n", len);
ns_send(conn->ns_conn, chunk_size, n);
ns_send(conn->ns_conn, buf, len);
ns_send(conn->ns_conn, "\r\n", 2);
}
size_t mg_printf(struct mg_connection *conn, const char *fmt, ...) {
struct connection *c = MG_CONN_2_CONN(conn);
va_list ap;
va_start(ap, fmt);
ns_vprintf(c->ns_conn, fmt, ap);
va_end(ap);
return c->ns_conn->send_iobuf.len;
}
static void ns_forward(struct ns_connection *from, struct ns_connection *to) {
DBG(("%p -> %p %lu bytes", from, to, (unsigned long)from->recv_iobuf.len));
ns_send(to, from->recv_iobuf.buf, from->recv_iobuf.len);
iobuf_remove(&from->recv_iobuf, from->recv_iobuf.len);
}
#ifndef MONGOOSE_NO_CGI
#ifdef _WIN32
struct threadparam {
sock_t s;
HANDLE hPipe;
};
static int wait_until_ready(sock_t sock, int for_read) {
fd_set set;
FD_ZERO(&set);
FD_SET(sock, &set);
select(sock + 1, for_read ? &set : 0, for_read ? 0 : &set, 0, 0);
return 1;
}
static void *push_to_stdin(void *arg) {
struct threadparam *tp = (struct threadparam *)arg;
int n, sent, stop = 0;
DWORD k;
char buf[IOBUF_SIZE];
while (!stop && wait_until_ready(tp->s, 1) &&
(n = recv(tp->s, buf, sizeof(buf), 0)) > 0) {
if (n == -1 && GetLastError() == WSAEWOULDBLOCK) continue;
for (sent = 0; !stop && sent < n; sent += k) {
if (!WriteFile(tp->hPipe, buf + sent, n - sent, &k, 0)) stop = 1;
}
}
DBG(("%s", "FORWARED EVERYTHING TO CGI"));
CloseHandle(tp->hPipe);
free(tp);
_endthread();
return NULL;
}
static void *pull_from_stdout(void *arg) {
struct threadparam *tp = (struct threadparam *)arg;
int k = 0, stop = 0;
DWORD n, sent;
char buf[IOBUF_SIZE];
while (!stop && ReadFile(tp->hPipe, buf, sizeof(buf), &n, NULL)) {
for (sent = 0; !stop && sent < n; sent += k) {
if (wait_until_ready(tp->s, 0) &&
(k = send(tp->s, buf + sent, n - sent, 0)) <= 0) stop = 1;
}
}
DBG(("%s", "EOF FROM CGI"));
CloseHandle(tp->hPipe);
shutdown(tp->s, 2); // Without this, IO thread may get truncated data
closesocket(tp->s);
free(tp);
_endthread();
return NULL;
}
static void spawn_stdio_thread(sock_t sock, HANDLE hPipe,
void *(*func)(void *)) {
struct threadparam *tp = (struct threadparam *)malloc(sizeof(*tp));
if (tp != NULL) {
tp->s = sock;
tp->hPipe = hPipe;
mg_start_thread(func, tp);
}
}
static void abs_path(const char *utf8_path, char *abs_path, size_t len) {
wchar_t buf[MAX_PATH_SIZE], buf2[MAX_PATH_SIZE];
to_wchar(utf8_path, buf, ARRAY_SIZE(buf));
GetFullPathNameW(buf, ARRAY_SIZE(buf2), buf2, NULL);
WideCharToMultiByte(CP_UTF8, 0, buf2, wcslen(buf2) + 1, abs_path, len, 0, 0);
}
static process_id_t start_process(char *interp, const char *cmd,
const char *env, const char *envp[],
const char *dir, sock_t sock) {
STARTUPINFOW si;
PROCESS_INFORMATION pi;
HANDLE a[2], b[2], me = GetCurrentProcess();
wchar_t wcmd[MAX_PATH_SIZE], full_dir[MAX_PATH_SIZE];
char buf[MAX_PATH_SIZE], buf4[MAX_PATH_SIZE], buf5[MAX_PATH_SIZE],
cmdline[MAX_PATH_SIZE], *p;
DWORD flags = DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS;
FILE *fp;
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
si.wShowWindow = SW_HIDE;
si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
CreatePipe(&a[0], &a[1], NULL, 0);
CreatePipe(&b[0], &b[1], NULL, 0);
DuplicateHandle(me, a[0], me, &si.hStdInput, 0, TRUE, flags);
DuplicateHandle(me, b[1], me, &si.hStdOutput, 0, TRUE, flags);
if (interp == NULL && (fp = fopen(cmd, "r")) != NULL) {
buf[0] = buf[1] = '\0';
fgets(buf, sizeof(buf), fp);
buf[sizeof(buf) - 1] = '\0';
if (buf[0] == '#' && buf[1] == '!') {
interp = buf + 2;
for (p = interp + strlen(interp) - 1;
isspace(* (uint8_t *) p) && p > interp; p--) *p = '\0';
}
fclose(fp);
}
if (interp != NULL) {
abs_path(interp, buf4, ARRAY_SIZE(buf4));
interp = buf4;
}
abs_path(dir, buf5, ARRAY_SIZE(buf5));
to_wchar(dir, full_dir, ARRAY_SIZE(full_dir));
mg_snprintf(cmdline, sizeof(cmdline), "%s%s\"%s\"",
interp ? interp : "", interp ? " " : "", cmd);
to_wchar(cmdline, wcmd, ARRAY_SIZE(wcmd));
if (CreateProcessW(NULL, wcmd, NULL, NULL, TRUE, CREATE_NEW_PROCESS_GROUP,
(void *) env, full_dir, &si, &pi) != 0) {
spawn_stdio_thread(sock, a[1], push_to_stdin);
spawn_stdio_thread(sock, b[0], pull_from_stdout);
} else {
CloseHandle(a[1]);
CloseHandle(b[0]);
closesocket(sock);
}
DBG(("CGI command: [%ls] -> %p", wcmd, pi.hProcess));
// Not closing a[0] and b[1] because we've used DUPLICATE_CLOSE_SOURCE
CloseHandle(si.hStdOutput);
CloseHandle(si.hStdInput);
//CloseHandle(pi.hThread);
//CloseHandle(pi.hProcess);
return pi.hProcess;
}
#else
static process_id_t start_process(const char *interp, const char *cmd,
const char *env, const char *envp[],
const char *dir, sock_t sock) {
char buf[500];
process_id_t pid = fork();
(void) env;
if (pid == 0) {
(void) chdir(dir);
(void) dup2(sock, 0);
(void) dup2(sock, 1);
closesocket(sock);
// After exec, all signal handlers are restored to their default values,
// with one exception of SIGCHLD. According to POSIX.1-2001 and Linux's
// implementation, SIGCHLD's handler will leave unchanged after exec
// if it was set to be ignored. Restore it to default action.
signal(SIGCHLD, SIG_DFL);
if (interp == NULL) {
execle(cmd, cmd, (char *) 0, envp); // Using (char *) 0 to avoid warning
} else {
execle(interp, interp, cmd, (char *) 0, envp);
}
snprintf(buf, sizeof(buf), "Status: 500\r\n\r\n"
"500 Server Error: %s%s%s: %s", interp == NULL ? "" : interp,
interp == NULL ? "" : " ", cmd, strerror(errno));
send(1, buf, strlen(buf), 0);
exit(EXIT_FAILURE); // exec call failed
}
return pid;
}
#endif // _WIN32
// This structure helps to create an environment for the spawned CGI program.
// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
// last element must be NULL.
// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
// strings must reside in a contiguous buffer. The end of the buffer is
// marked by two '\0' characters.
// We satisfy both worlds: we create an envp array (which is vars), all
// entries are actually pointers inside buf.
struct cgi_env_block {
struct mg_connection *conn;
char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
const char *vars[MAX_CGI_ENVIR_VARS]; // char *envp[]
int len; // Space taken
int nvars; // Number of variables in envp[]
};
// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
// pointer into the vars array.
static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
int n, space;
char *added;
va_list ap;
// Calculate how much space is left in the buffer
space = sizeof(block->buf) - block->len - 2;
assert(space >= 0);
// Make a pointer to the free space int the buffer
added = block->buf + block->len;
// Copy VARIABLE=VALUE\0 string into the free space
va_start(ap, fmt);
n = mg_vsnprintf(added, (size_t) space, fmt, ap);
va_end(ap);
// Make sure we do not overflow buffer and the envp array
if (n > 0 && n + 1 < space &&
block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
// Append a pointer to the added string into the envp array
block->vars[block->nvars++] = added;
// Bump up used length counter. Include \0 terminator
block->len += n + 1;
}
return added;
}
static void addenv2(struct cgi_env_block *blk, const char *name) {
const char *s;
if ((s = getenv(name)) != NULL) addenv(blk, "%s=%s", name, s);
}
static void prepare_cgi_environment(struct connection *conn,
const char *prog,
struct cgi_env_block *blk) {
struct mg_connection *ri = &conn->mg_conn;
const char *s, *slash;
char *p, **opts = conn->server->config_options;
int i;
blk->len = blk->nvars = 0;
blk->conn = ri;
if ((s = getenv("SERVER_NAME")) != NULL) {
addenv(blk, "SERVER_NAME=%s", s);
} else {
addenv(blk, "SERVER_NAME=%s", ri->local_ip);
}
addenv(blk, "SERVER_ROOT=%s", opts[DOCUMENT_ROOT]);
addenv(blk, "DOCUMENT_ROOT=%s", opts[DOCUMENT_ROOT]);
addenv(blk, "SERVER_SOFTWARE=%s/%s", "Mongoose", MONGOOSE_VERSION);
// Prepare the environment block
addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
// TODO(lsm): fix this for IPv6 case
//addenv(blk, "SERVER_PORT=%d", ri->remote_port);
addenv(blk, "REQUEST_METHOD=%s", ri->request_method);
addenv(blk, "REMOTE_ADDR=%s", ri->remote_ip);
addenv(blk, "REMOTE_PORT=%d", ri->remote_port);
addenv(blk, "REQUEST_URI=%s%s%s", ri->uri,
ri->query_string == NULL ? "" : "?",
ri->query_string == NULL ? "" : ri->query_string);
// SCRIPT_NAME
if (conn->path_info != NULL) {
addenv(blk, "SCRIPT_NAME=%.*s",
(int) (strlen(ri->uri) - strlen(conn->path_info)), ri->uri);
addenv(blk, "PATH_INFO=%s", conn->path_info);
} else {
s = strrchr(prog, '/');
slash = strrchr(ri->uri, '/');
addenv(blk, "SCRIPT_NAME=%.*s%s",
slash == NULL ? 0 : (int) (slash - ri->uri), ri->uri,
s == NULL ? prog : s);
}
addenv(blk, "SCRIPT_FILENAME=%s", prog);
addenv(blk, "PATH_TRANSLATED=%s", prog);
addenv(blk, "HTTPS=%s", conn->ns_conn->ssl != NULL ? "on" : "off");
if ((s = mg_get_header(ri, "Content-Type")) != NULL)
addenv(blk, "CONTENT_TYPE=%s", s);
if (ri->query_string != NULL)
addenv(blk, "QUERY_STRING=%s", ri->query_string);
if ((s = mg_get_header(ri, "Content-Length")) != NULL)
addenv(blk, "CONTENT_LENGTH=%s", s);
addenv2(blk, "PATH");
addenv2(blk, "TMP");
addenv2(blk, "TEMP");
addenv2(blk, "TMPDIR");
addenv2(blk, "PERLLIB");
addenv2(blk, ENV_EXPORT_TO_CGI);
#if defined(_WIN32)
addenv2(blk, "COMSPEC");
addenv2(blk, "SYSTEMROOT");
addenv2(blk, "SystemDrive");
addenv2(blk, "ProgramFiles");
addenv2(blk, "ProgramFiles(x86)");
addenv2(blk, "CommonProgramFiles(x86)");
#else
addenv2(blk, "LD_LIBRARY_PATH");
#endif // _WIN32
// Add all headers as HTTP_* variables
for (i = 0; i < ri->num_headers; i++) {
p = addenv(blk, "HTTP_%s=%s",
ri->http_headers[i].name, ri->http_headers[i].value);
// Convert variable name into uppercase, and change - to _
for (; *p != '=' && *p != '\0'; p++) {
if (*p == '-')
*p = '_';
*p = (char) toupper(* (unsigned char *) p);
}
}
blk->vars[blk->nvars++] = NULL;
blk->buf[blk->len++] = '\0';
assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
assert(blk->len > 0);
assert(blk->len < (int) sizeof(blk->buf));
}
static const char cgi_status[] = "HTTP/1.1 200 OK\r\n";
static void open_cgi_endpoint(struct connection *conn, const char *prog) {
struct cgi_env_block blk;
char dir[MAX_PATH_SIZE];
const char *p;
sock_t fds[2];
prepare_cgi_environment(conn, prog, &blk);
// CGI must be executed in its own directory. 'dir' must point to the
// directory containing executable program, 'p' must point to the
// executable program name relative to 'dir'.
if ((p = strrchr(prog, '/')) == NULL) {
mg_snprintf(dir, sizeof(dir), "%s", ".");
} else {
mg_snprintf(dir, sizeof(dir), "%.*s", (int) (p - prog), prog);
}
// Try to create socketpair in a loop until success. ns_socketpair()
// can be interrupted by a signal and fail.
// TODO(lsm): use sigaction to restart interrupted syscall
do {
ns_socketpair(fds);
} while (fds[0] == INVALID_SOCKET);
if (start_process(conn->server->config_options[CGI_INTERPRETER],
prog, blk.buf, blk.vars, dir, fds[1]) != 0) {
conn->endpoint_type = EP_CGI;
conn->endpoint.nc = ns_add_sock(&conn->server->ns_mgr, fds[0],
mg_ev_handler, conn);
conn->endpoint.nc->flags |= MG_CGI_CONN;
ns_send(conn->ns_conn, cgi_status, sizeof(cgi_status) - 1);
conn->mg_conn.status_code = 200;
conn->ns_conn->flags |= NSF_BUFFER_BUT_DONT_SEND;
// Pass POST data to the CGI process
conn->endpoint.nc->send_iobuf = conn->ns_conn->recv_iobuf;
iobuf_init(&conn->ns_conn->recv_iobuf, 0);
} else {
closesocket(fds[0]);
send_http_error(conn, 500, "start_process(%s) failed", prog);
}
#ifndef _WIN32
closesocket(fds[1]); // On Windows, CGI stdio thread closes that socket
#endif
}
static void on_cgi_data(struct ns_connection *nc) {
struct connection *conn = (struct connection *) nc->user_data;
const char *status = "500";
struct mg_connection c;
if (!conn) return;
// Copy CGI data from CGI socket to the client send buffer
ns_forward(nc, conn->ns_conn);
// If reply has not been parsed yet, parse it
if (conn->ns_conn->flags & NSF_BUFFER_BUT_DONT_SEND) {
struct iobuf *io = &conn->ns_conn->send_iobuf;
int s_len = sizeof(cgi_status) - 1;
int len = get_request_len(io->buf + s_len, io->len - s_len);
char buf[MAX_REQUEST_SIZE], *s = buf;
if (len == 0) return;
if (len < 0 || len > (int) sizeof(buf)) {
len = io->len;
iobuf_remove(io, io->len);
send_http_error(conn, 500, "CGI program sent malformed headers: [%.*s]",
len, io->buf);
} else {
memset(&c, 0, sizeof(c));
memcpy(buf, io->buf + s_len, len);
buf[len - 1] = '\0';
parse_http_headers(&s, &c);
if (mg_get_header(&c, "Location") != NULL) {
status = "302";
} else if ((status = (char *) mg_get_header(&c, "Status")) == NULL) {
status = "200";
}
memcpy(io->buf + 9, status, 3);
conn->mg_conn.status_code = atoi(status);
}
conn->ns_conn->flags &= ~NSF_BUFFER_BUT_DONT_SEND;
}
}
#endif // !MONGOOSE_NO_CGI
static char *mg_strdup(const char *str) {
char *copy = (char *) malloc(strlen(str) + 1);
if (copy != NULL) {
strcpy(copy, str);
}
return copy;
}
static int isbyte(int n) {
return n >= 0 && n <= 255;
}
static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
int n, a, b, c, d, slash = 32, len = 0;
if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) &&
slash >= 0 && slash < 33) {
len = n;
*net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d;
*mask = slash ? 0xffffffffU << (32 - slash) : 0;
}
return len;
}
// Verify given socket address against the ACL.
// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
static int check_acl(const char *acl, uint32_t remote_ip) {
int allowed, flag;
uint32_t net, mask;
struct vec vec;
// If any ACL is set, deny by default
allowed = acl == NULL ? '+' : '-';
while ((acl = next_option(acl, &vec, NULL)) != NULL) {
flag = vec.ptr[0];
if ((flag != '+' && flag != '-') ||
parse_net(&vec.ptr[1], &net, &mask) == 0) {
return -1;
}
if (net == (remote_ip & mask)) {
allowed = flag;
}
}
return allowed == '+';
}
// Protect against directory disclosure attack by removing '..',
// excessive '/' and '\' characters
static void remove_double_dots_and_double_slashes(char *s) {
char *p = s;
while (*s != '\0') {
*p++ = *s++;
if (s[-1] == '/' || s[-1] == '\\') {
// Skip all following slashes, backslashes and double-dots
while (s[0] != '\0') {
if (s[0] == '/' || s[0] == '\\') { s++; }
else if (s[0] == '.' && s[1] == '.') { s += 2; }
else { break; }
}
}
}
*p = '\0';
}
int mg_url_decode(const char *src, int src_len, char *dst,
int dst_len, int is_form_url_encoded) {
int i, j, a, b;
#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
if (src[i] == '%' && i < src_len - 2 &&
isxdigit(* (const unsigned char *) (src + i + 1)) &&
isxdigit(* (const unsigned char *) (src + i + 2))) {
a = tolower(* (const unsigned char *) (src + i + 1));
b = tolower(* (const unsigned char *) (src + i + 2));
dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
i += 2;
} else if (is_form_url_encoded && src[i] == '+') {
dst[j] = ' ';
} else {
dst[j] = src[i];
}
}
dst[j] = '\0'; // Null-terminate the destination
return i >= src_len ? j : -1;
}
static int is_valid_http_method(const char *s) {
return !strcmp(s, "GET") || !strcmp(s, "POST") || !strcmp(s, "HEAD") ||
!strcmp(s, "CONNECT") || !strcmp(s, "PUT") || !strcmp(s, "DELETE") ||
!strcmp(s, "OPTIONS") || !strcmp(s, "PROPFIND") || !strcmp(s, "MKCOL");
}
// Parse HTTP request, fill in mg_request structure.
// This function modifies the buffer by NUL-terminating
// HTTP request components, header names and header values.
// Note that len must point to the last \n of HTTP headers.
static int parse_http_message(char *buf, int len, struct mg_connection *ri) {
int is_request, n;
// Reset the connection. Make sure that we don't touch fields that are
// set elsewhere: remote_ip, remote_port, server_param
ri->request_method = ri->uri = ri->http_version = ri->query_string = NULL;
ri->num_headers = ri->status_code = ri->is_websocket = ri->content_len = 0;
buf[len - 1] = '\0';
// RFC says that all initial whitespaces should be ingored
while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
buf++;
}
ri->request_method = skip(&buf, " ");
ri->uri = skip(&buf, " ");
ri->http_version = skip(&buf, "\r\n");
// HTTP message could be either HTTP request or HTTP response, e.g.
// "GET / HTTP/1.0 ...." or "HTTP/1.0 200 OK ..."
is_request = is_valid_http_method(ri->request_method);
if ((is_request && memcmp(ri->http_version, "HTTP/", 5) != 0) ||
(!is_request && memcmp(ri->request_method, "HTTP/", 5) != 0)) {
len = -1;
} else {
if (is_request) {
ri->http_version += 5;
} else {
ri->status_code = atoi(ri->uri);
}
parse_http_headers(&buf, ri);
if ((ri->query_string = strchr(ri->uri, '?')) != NULL) {
*(char *) ri->query_string++ = '\0';
}
n = (int) strlen(ri->uri);
mg_url_decode(ri->uri, n, (char *) ri->uri, n + 1, 0);
if (*ri->uri == '/' || *ri->uri == '.') {
remove_double_dots_and_double_slashes((char *) ri->uri);
}
}
return len;
}
static int lowercase(const char *s) {
return tolower(* (const unsigned char *) s);
}
static int mg_strcasecmp(const char *s1, const char *s2) {
int diff;
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0');
return diff;
}
static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
int diff = 0;
if (len > 0)
do {
diff = lowercase(s1++) - lowercase(s2++);
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
return diff;
}
// Return HTTP header value, or NULL if not found.
const char *mg_get_header(const struct mg_connection *ri, const char *s) {
int i;
for (i = 0; i < ri->num_headers; i++)
if (!mg_strcasecmp(s, ri->http_headers[i].name))
return ri->http_headers[i].value;
return NULL;
}
// Perform case-insensitive match of string against pattern
int mg_match_prefix(const char *pattern, int pattern_len, const char *str) {
const char *or_str;
int len, res, i = 0, j = 0;
if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
res = mg_match_prefix(pattern, or_str - pattern, str);
return res > 0 ? res : mg_match_prefix(or_str + 1,
(pattern + pattern_len) - (or_str + 1), str);
}
for (; i < pattern_len; i++, j++) {
if (pattern[i] == '?' && str[j] != '\0') {
continue;
} else if (pattern[i] == '$') {
return str[j] == '\0' ? j : -1;
} else if (pattern[i] == '*') {
i++;
if (pattern[i] == '*') {
i++;
len = (int) strlen(str + j);
} else {
len = (int) strcspn(str + j, "/");
}
if (i == pattern_len) {
return j + len;
}
do {
res = mg_match_prefix(pattern + i, pattern_len - i, str + j + len);
} while (res == -1 && len-- > 0);
return res == -1 ? -1 : j + res + len;
} else if (lowercase(&pattern[i]) != lowercase(&str[j])) {
return -1;
}
}
return j;
}
// This function prints HTML pages, and expands "{{something}}" blocks
// inside HTML by calling appropriate callback functions.
// Note that {{@path/to/file}} construct outputs embedded file's contents,
// which provides SSI-like functionality.
void mg_template(struct mg_connection *conn, const char *s,
struct mg_expansion *expansions) {
int i, j, pos = 0, inside_marker = 0;
for (i = 0; s[i] != '\0'; i++) {
if (inside_marker == 0 && !memcmp(&s[i], "{{", 2)) {
if (i > pos) {
mg_send_data(conn, &s[pos], i - pos);
}
pos = i;
inside_marker = 1;
}
if (inside_marker == 1 && !memcmp(&s[i], "}}", 2)) {
for (j = 0; expansions[j].keyword != NULL; j++) {
const char *kw = expansions[j].keyword;
if ((int) strlen(kw) == i - (pos + 2) &&
memcmp(kw, &s[pos + 2], i - (pos + 2)) == 0) {
expansions[j].handler(conn);
pos = i + 2;
break;
}
}
inside_marker = 0;
}
}
if (i > pos) {
mg_send_data(conn, &s[pos], i - pos);
}
}
#ifndef MONGOOSE_NO_FILESYSTEM
static int must_hide_file(struct connection *conn, const char *path) {
const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$";
const char *pattern = conn->server->config_options[HIDE_FILES_PATTERN];
return mg_match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 ||
(pattern != NULL && mg_match_prefix(pattern, strlen(pattern), path) > 0);
}
// Return 1 if real file has been found, 0 otherwise
static int convert_uri_to_file_name(struct connection *conn, char *buf,
size_t buf_len, file_stat_t *st) {
struct vec a, b;
const char *rewrites = conn->server->config_options[URL_REWRITES];
const char *root = conn->server->config_options[DOCUMENT_ROOT];
#ifndef MONGOOSE_NO_CGI
const char *cgi_pat = conn->server->config_options[CGI_PATTERN];
char *p;
#endif
const char *uri = conn->mg_conn.uri;
const char *domain = mg_get_header(&conn->mg_conn, "Host");
int match_len, root_len = root == NULL ? 0 : strlen(root);
// Perform virtual hosting rewrites
if (rewrites != NULL && domain != NULL) {
const char *colon = strchr(domain, ':');
int domain_len = colon == NULL ? (int) strlen(domain) : colon - domain;
while ((rewrites = next_option(rewrites, &a, &b)) != NULL) {
if (a.len > 1 && a.ptr[0] == '@' && a.len == domain_len + 1 &&
mg_strncasecmp(a.ptr + 1, domain, domain_len) == 0) {
root = b.ptr;
root_len = b.len;
break;
}
}
}
// No filesystem access
if (root == NULL || root_len == 0) return 0;
// Handle URL rewrites
mg_snprintf(buf, buf_len, "%.*s%s", root_len, root, uri);
rewrites = conn->server->config_options[URL_REWRITES]; // Re-initialize!
while ((rewrites = next_option(rewrites, &a, &b)) != NULL) {
if ((match_len = mg_match_prefix(a.ptr, a.len, uri)) > 0) {
mg_snprintf(buf, buf_len, "%.*s%s", (int) b.len, b.ptr, uri + match_len);
break;
}
}
if (stat(buf, st) == 0) return 1;
#ifndef MONGOOSE_NO_CGI
// Support PATH_INFO for CGI scripts.
for (p = buf + strlen(root) + 2; *p != '\0'; p++) {
if (*p == '/') {
*p = '\0';
if (mg_match_prefix(cgi_pat, strlen(cgi_pat), buf) > 0 &&
!stat(buf, st)) {
DBG(("!!!! [%s]", buf));
*p = '/';
conn->path_info = mg_strdup(p);
*p = '\0';
return 1;
}
*p = '/';
}
}
#endif
return 0;
}
#endif // MONGOOSE_NO_FILESYSTEM
static int should_keep_alive(const struct mg_connection *conn) {
struct connection *c = MG_CONN_2_CONN(conn);
const char *method = conn->request_method;
const char *http_version = conn->http_version;
const char *header = mg_get_header(conn, "Connection");
return method != NULL &&
(!strcmp(method, "GET") || c->endpoint_type == EP_USER) &&
((header != NULL && !mg_strcasecmp(header, "keep-alive")) ||
(header == NULL && http_version && !strcmp(http_version, "1.1")));
}
size_t mg_write(struct mg_connection *c, const void *buf, int len) {
struct connection *conn = MG_CONN_2_CONN(c);
ns_send(conn->ns_conn, buf, len);
return conn->ns_conn->send_iobuf.len;
}
void mg_send_status(struct mg_connection *c, int status) {
if (c->status_code == 0) {
c->status_code = status;
mg_printf(c, "HTTP/1.1 %d %s\r\n", status, status_code_to_str(status));
}
}
void mg_send_header(struct mg_connection *c, const char *name, const char *v) {
if (c->status_code == 0) {
c->status_code = 200;
mg_printf(c, "HTTP/1.1 %d %s\r\n", 200, status_code_to_str(200));
}
mg_printf(c, "%s: %s\r\n", name, v);
}
static void terminate_headers(struct mg_connection *c) {
struct connection *conn = MG_CONN_2_CONN(c);
if (!(conn->ns_conn->flags & MG_HEADERS_SENT)) {
mg_send_header(c, "Transfer-Encoding", "chunked");
mg_write(c, "\r\n", 2);
conn->ns_conn->flags |= MG_HEADERS_SENT;
}
}
size_t mg_send_data(struct mg_connection *c, const void *data, int data_len) {
struct connection *conn = MG_CONN_2_CONN(c);
terminate_headers(c);
write_chunk(MG_CONN_2_CONN(c), (const char *) data, data_len);
return conn->ns_conn->send_iobuf.len;
}
size_t mg_printf_data(struct mg_connection *c, const char *fmt, ...) {
struct connection *conn = MG_CONN_2_CONN(c);
va_list ap;
int len;
char mem[IOBUF_SIZE], *buf = mem;
terminate_headers(c);
va_start(ap, fmt);
len = ns_avprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
if (len >= 0) {
write_chunk((struct connection *) conn, buf, len);
}
if (buf != mem && buf != NULL) {
free(buf);
}
return conn->ns_conn->send_iobuf.len;
}
#if !defined(MONGOOSE_NO_WEBSOCKET) || !defined(MONGOOSE_NO_AUTH)
static int is_big_endian(void) {
static const int n = 1;
return ((char *) &n)[0] == 0;
}
#endif
#ifndef MONGOOSE_NO_WEBSOCKET
// START OF SHA-1 code
// Copyright(c) By Steve Reid <steve@edmweb.com>
#define SHA1HANDSOFF
#if defined(__sun)
#include "solarisfixes.h"
#endif
union char64long16 { unsigned char c[64]; uint32_t l[16]; };
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
static uint32_t blk0(union char64long16 *block, int i) {
// Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN
if (!is_big_endian()) {
block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) |
(rol(block->l[i], 8) & 0x00FF00FF);
}
return block->l[i];
}
/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */
#undef blk
#undef R0
#undef R1
#undef R2
#undef R3
#undef R4
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
^block->l[(i+2)&15]^block->l[i&15],1))
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(block, i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
typedef struct {
uint32_t state[5];
uint32_t count[2];
unsigned char buffer[64];
} SHA1_CTX;
static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) {
uint32_t a, b, c, d, e;
union char64long16 block[1];
memcpy(block, buffer, 64);
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
// Erase working structures. The order of operations is important,
// used to ensure that compiler doesn't optimize those out.
memset(block, 0, sizeof(block));
a = b = c = d = e = 0;
(void) a; (void) b; (void) c; (void) d; (void) e;
}
static void SHA1Init(SHA1_CTX *context) {
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
context->count[0] = context->count[1] = 0;
}
static void SHA1Update(SHA1_CTX *context, const unsigned char *data,
uint32_t len) {
uint32_t i, j;
j = context->count[0];
if ((context->count[0] += len << 3) < j)
context->count[1]++;
context->count[1] += (len>>29);
j = (j >> 3) & 63;
if ((j + len) > 63) {
memcpy(&context->buffer[j], data, (i = 64-j));
SHA1Transform(context->state, context->buffer);
for ( ; i + 63 < len; i += 64) {
SHA1Transform(context->state, &data[i]);
}
j = 0;
}
else i = 0;
memcpy(&context->buffer[j], &data[i], len - i);
}
static void SHA1Final(unsigned char digest[20], SHA1_CTX *context) {
unsigned i;
unsigned char finalcount[8], c;
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
>> ((3-(i & 3)) * 8) ) & 255);
}
c = 0200;
SHA1Update(context, &c, 1);
while ((context->count[0] & 504) != 448) {
c = 0000;
SHA1Update(context, &c, 1);
}
SHA1Update(context, finalcount, 8);
for (i = 0; i < 20; i++) {
digest[i] = (unsigned char)
((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
}
memset(context, '\0', sizeof(*context));
memset(&finalcount, '\0', sizeof(finalcount));
}
// END OF SHA1 CODE
static void base64_encode(const unsigned char *src, int src_len, char *dst) {
static const char *b64 =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
int i, j, a, b, c;
for (i = j = 0; i < src_len; i += 3) {
a = src[i];
b = i + 1 >= src_len ? 0 : src[i + 1];
c = i + 2 >= src_len ? 0 : src[i + 2];
dst[j++] = b64[a >> 2];
dst[j++] = b64[((a & 3) << 4) | (b >> 4)];
if (i + 1 < src_len) {
dst[j++] = b64[(b & 15) << 2 | (c >> 6)];
}
if (i + 2 < src_len) {
dst[j++] = b64[c & 63];
}
}
while (j % 4 != 0) {
dst[j++] = '=';
}
dst[j++] = '\0';
}
static void send_websocket_handshake(struct mg_connection *conn,
const char *key) {
static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
char buf[500], sha[20], b64_sha[sizeof(sha) * 2];
SHA1_CTX sha_ctx;
mg_snprintf(buf, sizeof(buf), "%s%s", key, magic);
SHA1Init(&sha_ctx);
SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf));
SHA1Final((unsigned char *) sha, &sha_ctx);
base64_encode((unsigned char *) sha, sizeof(sha), b64_sha);
mg_snprintf(buf, sizeof(buf), "%s%s%s",
"HTTP/1.1 101 Switching Protocols\r\n"
"Upgrade: websocket\r\n"
"Connection: Upgrade\r\n"
"Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n");
mg_write(conn, buf, strlen(buf));
}
static int deliver_websocket_frame(struct connection *conn) {
// Having buf unsigned char * is important, as it is used below in arithmetic
unsigned char *buf = (unsigned char *) conn->ns_conn->recv_iobuf.buf;
int i, len, buf_len = conn->ns_conn->recv_iobuf.len, frame_len = 0,
mask_len = 0, header_len = 0, data_len = 0, buffered = 0;
if (buf_len >= 2) {
len = buf[1] & 127;
mask_len = buf[1] & 128 ? 4 : 0;
if (len < 126 && buf_len >= mask_len) {
data_len = len;
header_len = 2 + mask_len;
} else if (len == 126 && buf_len >= 4 + mask_len) {
header_len = 4 + mask_len;
data_len = ((((int) buf[2]) << 8) + buf[3]);
} else if (buf_len >= 10 + mask_len) {
header_len = 10 + mask_len;
data_len = (int) (((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32) +
htonl(* (uint32_t *) &buf[6]);
}
}
frame_len = header_len + data_len;
buffered = frame_len > 0 && frame_len <= buf_len;
if (buffered) {
conn->mg_conn.content_len = data_len;
conn->mg_conn.content = (char *) buf + header_len;
conn->mg_conn.wsbits = buf[0];
// Apply mask if necessary
if (mask_len > 0) {
for (i = 0; i < data_len; i++) {
buf[i + header_len] ^= (buf + header_len - mask_len)[i % 4];
}
}
// Call the handler and remove frame from the iobuf
if (call_user(conn, MG_REQUEST) == MG_FALSE) {
conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA;
}
iobuf_remove(&conn->ns_conn->recv_iobuf, frame_len);
}
return buffered;
}
size_t mg_websocket_write(struct mg_connection *conn, int opcode,
const char *data, size_t data_len) {
unsigned char mem[4192], *copy = mem;
size_t copy_len = 0;
if (data_len + 10 > sizeof(mem) &&
(copy = (unsigned char *) malloc(data_len + 10)) == NULL) {
return 0;
}
copy[0] = 0x80 + (opcode & 0x0f);
// Frame format: http://tools.ietf.org/html/rfc6455#section-5.2
if (data_len < 126) {
// Inline 7-bit length field
copy[1] = data_len;
memcpy(copy + 2, data, data_len);
copy_len = 2 + data_len;
} else if (data_len <= 0xFFFF) {
// 16-bit length field
copy[1] = 126;
* (uint16_t *) (copy + 2) = (uint16_t) htons((uint16_t) data_len);
memcpy(copy + 4, data, data_len);
copy_len = 4 + data_len;
} else {
// 64-bit length field
copy[1] = 127;
* (uint32_t *) (copy + 2) = (uint32_t)
htonl((uint32_t) ((uint64_t) data_len >> 32));
* (uint32_t *) (copy + 6) = (uint32_t) htonl(data_len & 0xffffffff);
memcpy(copy + 10, data, data_len);
copy_len = 10 + data_len;
}
if (copy_len > 0) {
mg_write(conn, copy, copy_len);
}
if (copy != mem) {
free(copy);
}
// If we send closing frame, schedule a connection to be closed after
// data is drained to the client.
if (opcode == WEBSOCKET_OPCODE_CONNECTION_CLOSE) {
MG_CONN_2_CONN(conn)->ns_conn->flags |= NSF_FINISHED_SENDING_DATA;
}
return MG_CONN_2_CONN(conn)->ns_conn->send_iobuf.len;
}
size_t mg_websocket_printf(struct mg_connection *conn, int opcode,
const char *fmt, ...) {
char mem[4192], *buf = mem;
va_list ap;
int len;
va_start(ap, fmt);
if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
mg_websocket_write(conn, opcode, buf, len);
}
va_end(ap);
if (buf != mem && buf != NULL) {
free(buf);
}
return MG_CONN_2_CONN(conn)->ns_conn->send_iobuf.len;
}
static void send_websocket_handshake_if_requested(struct mg_connection *conn) {
const char *ver = mg_get_header(conn, "Sec-WebSocket-Version"),
*key = mg_get_header(conn, "Sec-WebSocket-Key");
if (ver != NULL && key != NULL) {
conn->is_websocket = 1;
if (call_user(MG_CONN_2_CONN(conn), MG_WS_HANDSHAKE) == MG_FALSE) {
send_websocket_handshake(conn, key);
}
call_user(MG_CONN_2_CONN(conn), MG_WS_CONNECT);
}
}
static void ping_idle_websocket_connection(struct connection *conn, time_t t) {
if (t - conn->ns_conn->last_io_time > MONGOOSE_USE_WEBSOCKET_PING_INTERVAL) {
mg_websocket_write(&conn->mg_conn, WEBSOCKET_OPCODE_PING, "", 0);
}
}
#else
#define ping_idle_websocket_connection(conn, t)
#endif // !MONGOOSE_NO_WEBSOCKET
static void write_terminating_chunk(struct connection *conn) {
mg_write(&conn->mg_conn, "0\r\n\r\n", 5);
}
static int call_request_handler(struct connection *conn) {
int result;
conn->mg_conn.content = conn->ns_conn->recv_iobuf.buf;
if ((result = call_user(conn, MG_REQUEST)) == MG_TRUE) {
if (conn->ns_conn->flags & MG_HEADERS_SENT) {
write_terminating_chunk(conn);
}
close_local_endpoint(conn);
}
return result;
}
const char *mg_get_mime_type(const char *path, const char *default_mime_type) {
const char *ext;
size_t i, path_len;
path_len = strlen(path);
for (i = 0; static_builtin_mime_types[i].extension != NULL; i++) {
ext = path + (path_len - static_builtin_mime_types[i].ext_len);
if (path_len > static_builtin_mime_types[i].ext_len &&
mg_strcasecmp(ext, static_builtin_mime_types[i].extension) == 0) {
return static_builtin_mime_types[i].mime_type;
}
}
return default_mime_type;
}
#ifndef MONGOOSE_NO_FILESYSTEM
// Convert month to the month number. Return -1 on error, or month number
static int get_month_index(const char *s) {
static const char *month_names[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
int i;
for (i = 0; i < (int) ARRAY_SIZE(month_names); i++)
if (!strcmp(s, month_names[i]))
return i;
return -1;
}
static int num_leap_years(int year) {
return year / 4 - year / 100 + year / 400;
}
// Parse UTC date-time string, and return the corresponding time_t value.
static time_t parse_date_string(const char *datetime) {
static const unsigned short days_before_month[] = {
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
};
char month_str[32];
int second, minute, hour, day, month, year, leap_days, days;
time_t result = (time_t) 0;
if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
&day, month_str, &year, &hour, &minute, &second) == 6) ||
(sscanf(datetime, "%d %3s %d %d:%d:%d",
&day, month_str, &year, &hour, &minute, &second) == 6) ||
(sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
&day, month_str, &year, &hour, &minute, &second) == 6) ||
(sscanf(datetime, "%d-%3s-%d %d:%d:%d",
&day, month_str, &year, &hour, &minute, &second) == 6)) &&
year > 1970 &&
(month = get_month_index(month_str)) != -1) {
leap_days = num_leap_years(year) - num_leap_years(1970);
year -= 1970;
days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
}
return result;
}
// Look at the "path" extension and figure what mime type it has.
// Store mime type in the vector.
static void get_mime_type(const struct mg_server *server, const char *path,
struct vec *vec) {
struct vec ext_vec, mime_vec;
const char *list, *ext;
size_t path_len;
path_len = strlen(path);
// Scan user-defined mime types first, in case user wants to
// override default mime types.
list = server->config_options[EXTRA_MIME_TYPES];
while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
// ext now points to the path suffix
ext = path + path_len - ext_vec.len;
if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
*vec = mime_vec;
return;
}
}
vec->ptr = mg_get_mime_type(path, "text/plain");
vec->len = strlen(vec->ptr);
}
static const char *suggest_connection_header(const struct mg_connection *conn) {
return should_keep_alive(conn) ? "keep-alive" : "close";
}
static void construct_etag(char *buf, size_t buf_len, const file_stat_t *st) {
mg_snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"",
(unsigned long) st->st_mtime, (int64_t) st->st_size);
}
// Return True if we should reply 304 Not Modified.
static int is_not_modified(const struct connection *conn,
const file_stat_t *stp) {
char etag[64];
const char *ims = mg_get_header(&conn->mg_conn, "If-Modified-Since");
const char *inm = mg_get_header(&conn->mg_conn, "If-None-Match");
construct_etag(etag, sizeof(etag), stp);
return (inm != NULL && !mg_strcasecmp(etag, inm)) ||
(ims != NULL && stp->st_mtime <= parse_date_string(ims));
}
// For given directory path, substitute it to valid index file.
// Return 0 if index file has been found, -1 if not found.
// If the file is found, it's stats is returned in stp.
static int find_index_file(struct connection *conn, char *path,
size_t path_len, file_stat_t *stp) {
const char *list = conn->server->config_options[INDEX_FILES];
file_stat_t st;
struct vec filename_vec;
size_t n = strlen(path), found = 0;
// The 'path' given to us points to the directory. Remove all trailing
// directory separator characters from the end of the path, and
// then append single directory separator character.
while (n > 0 && path[n - 1] == '/') {
n--;
}
path[n] = '/';
// Traverse index files list. For each entry, append it to the given
// path and see if the file exists. If it exists, break the loop
while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
// Ignore too long entries that may overflow path buffer
if (filename_vec.len > (int) (path_len - (n + 2)))
continue;
// Prepare full path to the index file
strncpy(path + n + 1, filename_vec.ptr, filename_vec.len);
path[n + 1 + filename_vec.len] = '\0';
//DBG(("[%s]", path));
// Does it exist?
if (!stat(path, &st)) {
// Yes it does, break the loop
*stp = st;
found = 1;
break;
}
}
// If no index file exists, restore directory path
if (!found) {
path[n] = '\0';
}
return found;
}
static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
}
static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
}
static void open_file_endpoint(struct connection *conn, const char *path,
file_stat_t *st, const char *extra_headers) {
char date[64], lm[64], etag[64], range[64], headers[1000];
const char *msg = "OK", *hdr;
time_t curtime = time(NULL);
int64_t r1, r2;
struct vec mime_vec;
int n;
conn->endpoint_type = EP_FILE;
ns_set_close_on_exec(conn->endpoint.fd);
conn->mg_conn.status_code = 200;
get_mime_type(conn->server, path, &mime_vec);
conn->cl = st->st_size;
range[0] = '\0';
// If Range: header specified, act accordingly
r1 = r2 = 0;
hdr = mg_get_header(&conn->mg_conn, "Range");
if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0 &&
r1 >= 0 && r2 >= 0) {
conn->mg_conn.status_code = 206;
conn->cl = n == 2 ? (r2 > conn->cl ? conn->cl : r2) - r1 + 1: conn->cl - r1;
mg_snprintf(range, sizeof(range), "Content-Range: bytes "
"%" INT64_FMT "-%" INT64_FMT "/%" INT64_FMT "\r\n",
r1, r1 + conn->cl - 1, (int64_t) st->st_size);
msg = "Partial Content";
lseek(conn->endpoint.fd, r1, SEEK_SET);
}
// Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
// http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
gmt_time_string(date, sizeof(date), &curtime);
gmt_time_string(lm, sizeof(lm), &st->st_mtime);
construct_etag(etag, sizeof(etag), st);
n = mg_snprintf(headers, sizeof(headers),
"HTTP/1.1 %d %s\r\n"
"Date: %s\r\n"
"Last-Modified: %s\r\n"
"Etag: %s\r\n"
"Content-Type: %.*s\r\n"
"Content-Length: %" INT64_FMT "\r\n"
"Connection: %s\r\n"
"Accept-Ranges: bytes\r\n"
"%s%s%s\r\n",
conn->mg_conn.status_code, msg, date, lm, etag,
(int) mime_vec.len, mime_vec.ptr, conn->cl,
suggest_connection_header(&conn->mg_conn),
range, extra_headers == NULL ? "" : extra_headers,
MONGOOSE_USE_EXTRA_HTTP_HEADERS);
ns_send(conn->ns_conn, headers, n);
if (!strcmp(conn->mg_conn.request_method, "HEAD")) {
conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA;
close(conn->endpoint.fd);
conn->endpoint_type = EP_NONE;
}
}
void mg_send_file_data(struct mg_connection *c, int fd) {
struct connection *conn = MG_CONN_2_CONN(c);
conn->endpoint_type = EP_FILE;
conn->endpoint.fd = fd;
ns_set_close_on_exec(conn->endpoint.fd);
}
#endif // MONGOOSE_NO_FILESYSTEM
static void call_request_handler_if_data_is_buffered(struct connection *conn) {
#ifndef MONGOOSE_NO_WEBSOCKET
if (conn->mg_conn.is_websocket) {
do { } while (deliver_websocket_frame(conn));
} else
#endif
if (conn->num_bytes_recv >= (conn->cl + conn->request_len) &&
call_request_handler(conn) == MG_FALSE) {
open_local_endpoint(conn, 1);
}
}
#if !defined(MONGOOSE_NO_DIRECTORY_LISTING) || !defined(MONGOOSE_NO_DAV)
#ifdef _WIN32
struct dirent {
char d_name[MAX_PATH_SIZE];
};
typedef struct DIR {
HANDLE handle;
WIN32_FIND_DATAW info;
struct dirent result;
} DIR;
// Implementation of POSIX opendir/closedir/readdir for Windows.
static DIR *opendir(const char *name) {
DIR *dir = NULL;
wchar_t wpath[MAX_PATH_SIZE];
DWORD attrs;
if (name == NULL) {
SetLastError(ERROR_BAD_ARGUMENTS);
} else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
} else {
to_wchar(name, wpath, ARRAY_SIZE(wpath));
attrs = GetFileAttributesW(wpath);
if (attrs != 0xFFFFFFFF &&
((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
(void) wcscat(wpath, L"\\*");
dir->handle = FindFirstFileW(wpath, &dir->info);
dir->result.d_name[0] = '\0';
} else {
free(dir);
dir = NULL;
}
}
return dir;
}
static int closedir(DIR *dir) {
int result = 0;
if (dir != NULL) {
if (dir->handle != INVALID_HANDLE_VALUE)
result = FindClose(dir->handle) ? 0 : -1;
free(dir);
} else {
result = -1;
SetLastError(ERROR_BAD_ARGUMENTS);
}
return result;
}
static struct dirent *readdir(DIR *dir) {
struct dirent *result = 0;
if (dir) {
if (dir->handle != INVALID_HANDLE_VALUE) {
result = &dir->result;
(void) WideCharToMultiByte(CP_UTF8, 0,
dir->info.cFileName, -1, result->d_name,
sizeof(result->d_name), NULL, NULL);
if (!FindNextFileW(dir->handle, &dir->info)) {
(void) FindClose(dir->handle);
dir->handle = INVALID_HANDLE_VALUE;
}
} else {
SetLastError(ERROR_FILE_NOT_FOUND);
}
} else {
SetLastError(ERROR_BAD_ARGUMENTS);
}
return result;
}
#endif // _WIN32 POSIX opendir/closedir/readdir implementation
static int scan_directory(struct connection *conn, const char *dir,
struct dir_entry **arr) {
char path[MAX_PATH_SIZE];
struct dir_entry *p;
struct dirent *dp;
int arr_size = 0, arr_ind = 0, inc = 100;
DIR *dirp;
*arr = NULL;
if ((dirp = (opendir(dir))) == NULL) return 0;
while ((dp = readdir(dirp)) != NULL) {
// Do not show current dir and hidden files
if (!strcmp(dp->d_name, ".") ||
!strcmp(dp->d_name, "..") ||
must_hide_file(conn, dp->d_name)) {
continue;
}
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
// Resize the array if nesessary
if (arr_ind >= arr_size) {
if ((p = (struct dir_entry *)
realloc(*arr, (inc + arr_size) * sizeof(**arr))) != NULL) {
// Memset new chunk to zero, otherwize st_mtime will have garbage which
// can make strftime() segfault, see
// http://code.google.com/p/mongoose/issues/detail?id=79
memset(p + arr_size, 0, sizeof(**arr) * inc);
*arr = p;
arr_size += inc;
}
}
if (arr_ind < arr_size) {
(*arr)[arr_ind].conn = conn;
(*arr)[arr_ind].file_name = strdup(dp->d_name);
stat(path, &(*arr)[arr_ind].st);
arr_ind++;
}
}
closedir(dirp);
return arr_ind;
}
int mg_url_encode(const char *src, size_t s_len, char *dst, size_t dst_len) {
static const char *dont_escape = "._-$,;~()";
static const char *hex = "0123456789abcdef";
size_t i = 0, j = 0;
for (i = j = 0; dst_len > 0 && i < s_len && j + 2 < dst_len - 1; i++, j++) {
if (isalnum(* (const unsigned char *) (src + i)) ||
strchr(dont_escape, * (const unsigned char *) (src + i)) != NULL) {
dst[j] = src[i];
} else if (j + 3 < dst_len) {
dst[j] = '%';
dst[j + 1] = hex[(* (const unsigned char *) (src + i)) >> 4];
dst[j + 2] = hex[(* (const unsigned char *) (src + i)) & 0xf];
j += 2;
}
}
dst[j] = '\0';
return j;
}
#endif // !NO_DIRECTORY_LISTING || !MONGOOSE_NO_DAV
#ifndef MONGOOSE_NO_DIRECTORY_LISTING
static void print_dir_entry(const struct dir_entry *de) {
char size[64], mod[64], href[MAX_PATH_SIZE * 3];
int64_t fsize = de->st.st_size;
int is_dir = S_ISDIR(de->st.st_mode);
const char *slash = is_dir ? "/" : "";
if (is_dir) {
mg_snprintf(size, sizeof(size), "%s", "[DIRECTORY]");
} else {
// We use (signed) cast below because MSVC 6 compiler cannot
// convert unsigned __int64 to double.
if (fsize < 1024) {
mg_snprintf(size, sizeof(size), "%d", (int) fsize);
} else if (fsize < 0x100000) {
mg_snprintf(size, sizeof(size), "%.1fk", (double) fsize / 1024.0);
} else if (fsize < 0x40000000) {
mg_snprintf(size, sizeof(size), "%.1fM", (double) fsize / 1048576);
} else {
mg_snprintf(size, sizeof(size), "%.1fG", (double) fsize / 1073741824);
}
}
strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.st_mtime));
mg_url_encode(de->file_name, strlen(de->file_name), href, sizeof(href));
mg_printf_data(&de->conn->mg_conn,
"<tr><td><a href=\"%s%s\">%s%s</a></td>"
"<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
href, slash, de->file_name, slash, mod, size);
}
// Sort directory entries by size, or name, or modification time.
// On windows, __cdecl specification is needed in case if project is built
// with __stdcall convention. qsort always requires __cdels callback.
static int __cdecl compare_dir_entries(const void *p1, const void *p2) {
const struct dir_entry *a = (const struct dir_entry *) p1,
*b = (const struct dir_entry *) p2;
const char *qs = a->conn->mg_conn.query_string ?
a->conn->mg_conn.query_string : "na";
int cmp_result = 0;
if (S_ISDIR(a->st.st_mode) && !S_ISDIR(b->st.st_mode)) {
return -1; // Always put directories on top
} else if (!S_ISDIR(a->st.st_mode) && S_ISDIR(b->st.st_mode)) {
return 1; // Always put directories on top
} else if (*qs == 'n') {
cmp_result = strcmp(a->file_name, b->file_name);
} else if (*qs == 's') {
cmp_result = a->st.st_size == b->st.st_size ? 0 :
a->st.st_size > b->st.st_size ? 1 : -1;
} else if (*qs == 'd') {
cmp_result = a->st.st_mtime == b->st.st_mtime ? 0 :
a->st.st_mtime > b->st.st_mtime ? 1 : -1;
}
return qs[1] == 'd' ? -cmp_result : cmp_result;
}
static void send_directory_listing(struct connection *conn, const char *dir) {
struct dir_entry *arr = NULL;
int i, num_entries, sort_direction = conn->mg_conn.query_string != NULL &&
conn->mg_conn.query_string[1] == 'd' ? 'a' : 'd';
mg_send_header(&conn->mg_conn, "Transfer-Encoding", "chunked");
mg_send_header(&conn->mg_conn, "Content-Type", "text/html; charset=utf-8");
mg_printf_data(&conn->mg_conn,
"<html><head><title>Index of %s</title>"
"<style>th {text-align: left;}</style></head>"
"<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
"<tr><th><a href=\"?n%c\">Name</a></th>"
"<th><a href=\"?d%c\">Modified</a></th>"
"<th><a href=\"?s%c\">Size</a></th></tr>"
"<tr><td colspan=\"3\"><hr></td></tr>",
conn->mg_conn.uri, conn->mg_conn.uri,
sort_direction, sort_direction, sort_direction);
num_entries = scan_directory(conn, dir, &arr);
qsort(arr, num_entries, sizeof(arr[0]), compare_dir_entries);
for (i = 0; i < num_entries; i++) {
print_dir_entry(&arr[i]);
free(arr[i].file_name);
}
free(arr);
write_terminating_chunk(conn);
close_local_endpoint(conn);
}
#endif // MONGOOSE_NO_DIRECTORY_LISTING
#ifndef MONGOOSE_NO_DAV
static void print_props(struct connection *conn, const char *uri,
file_stat_t *stp) {
char mtime[64];
gmt_time_string(mtime, sizeof(mtime), &stp->st_mtime);
mg_printf(&conn->mg_conn,
"<d:response>"
"<d:href>%s</d:href>"
"<d:propstat>"
"<d:prop>"
"<d:resourcetype>%s</d:resourcetype>"
"<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
"<d:getlastmodified>%s</d:getlastmodified>"
"</d:prop>"
"<d:status>HTTP/1.1 200 OK</d:status>"
"</d:propstat>"
"</d:response>\n",
uri, S_ISDIR(stp->st_mode) ? "<d:collection/>" : "",
(int64_t) stp->st_size, mtime);
}
static void handle_propfind(struct connection *conn, const char *path,
file_stat_t *stp, int exists) {
static const char header[] = "HTTP/1.1 207 Multi-Status\r\n"
"Connection: close\r\n"
"Content-Type: text/xml; charset=utf-8\r\n\r\n"
"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<d:multistatus xmlns:d='DAV:'>\n";
static const char footer[] = "</d:multistatus>";
const char *depth = mg_get_header(&conn->mg_conn, "Depth");
#ifdef MONGOOSE_NO_DIRECTORY_LISTING
const char *list_dir = "no";
#else
const char *list_dir = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
#endif
conn->mg_conn.status_code = 207;
// Print properties for the requested resource itself
if (!exists) {
conn->mg_conn.status_code = 404;
mg_printf(&conn->mg_conn, "%s", "HTTP/1.1 404 Not Found\r\n\r\n");
} else if (S_ISDIR(stp->st_mode) && mg_strcasecmp(list_dir, "yes") != 0) {
conn->mg_conn.status_code = 403;
mg_printf(&conn->mg_conn, "%s",
"HTTP/1.1 403 Directory Listing Denied\r\n\r\n");
} else {
ns_send(conn->ns_conn, header, sizeof(header) - 1);
print_props(conn, conn->mg_conn.uri, stp);
if (S_ISDIR(stp->st_mode) &&
(depth == NULL || strcmp(depth, "0") != 0)) {
struct dir_entry *arr = NULL;
int i, num_entries = scan_directory(conn, path, &arr);
for (i = 0; i < num_entries; i++) {
char buf[MAX_PATH_SIZE * 3];
struct dir_entry *de = &arr[i];
mg_url_encode(de->file_name, strlen(de->file_name), buf, sizeof(buf));
print_props(conn, buf, &de->st);
free(de->file_name);
}
free(arr);
}
ns_send(conn->ns_conn, footer, sizeof(footer) - 1);
}
close_local_endpoint(conn);
}
static void handle_mkcol(struct connection *conn, const char *path) {
int status_code = 500;
if (conn->mg_conn.content_len > 0) {
status_code = 415;
} else if (!mkdir(path, 0755)) {
status_code = 201;
} else if (errno == EEXIST) {
status_code = 405;
} else if (errno == EACCES) {
status_code = 403;
} else if (errno == ENOENT) {
status_code = 409;
}
send_http_error(conn, status_code, NULL);
}
static int remove_directory(const char *dir) {
char path[MAX_PATH_SIZE];
struct dirent *dp;
file_stat_t st;
DIR *dirp;
if ((dirp = opendir(dir)) == NULL) return 0;
while ((dp = readdir(dirp)) != NULL) {
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
mg_snprintf(path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
stat(path, &st);
if (S_ISDIR(st.st_mode)) {
remove_directory(path);
} else {
remove(path);
}
}
closedir(dirp);
rmdir(dir);
return 1;
}
static void handle_delete(struct connection *conn, const char *path) {
file_stat_t st;
if (stat(path, &st) != 0) {
send_http_error(conn, 404, NULL);
} else if (S_ISDIR(st.st_mode)) {
remove_directory(path);
send_http_error(conn, 204, NULL);
} else if (remove(path) == 0) {
send_http_error(conn, 204, NULL);
} else {
send_http_error(conn, 423, NULL);
}
}
// For a given PUT path, create all intermediate subdirectories
// for given path. Return 0 if the path itself is a directory,
// or -1 on error, 1 if OK.
static int put_dir(const char *path) {
char buf[MAX_PATH_SIZE];
const char *s, *p;
file_stat_t st;
// Create intermediate directories if they do not exist
for (s = p = path + 1; (p = strchr(s, '/')) != NULL; s = ++p) {
if (p - path >= (int) sizeof(buf)) return -1; // Buffer overflow
memcpy(buf, path, p - path);
buf[p - path] = '\0';
if (stat(buf, &st) != 0 && mkdir(buf, 0755) != 0) return -1;
if (p[1] == '\0') return 0; // Path is a directory itself
}
return 1;
}
static void handle_put(struct connection *conn, const char *path) {
file_stat_t st;
const char *range, *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
int64_t r1, r2;
int rc;
conn->mg_conn.status_code = !stat(path, &st) ? 200 : 201;
if ((rc = put_dir(path)) == 0) {
mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\n\r\n",
conn->mg_conn.status_code);
close_local_endpoint(conn);
} else if (rc == -1) {
send_http_error(conn, 500, "put_dir: %s", strerror(errno));
} else if (cl_hdr == NULL) {
send_http_error(conn, 411, NULL);
} else if ((conn->endpoint.fd =
open(path, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, 0644)) < 0) {
send_http_error(conn, 500, "open(%s): %s", path, strerror(errno));
} else {
DBG(("PUT [%s] %lu", path, (unsigned long) conn->ns_conn->recv_iobuf.len));
conn->endpoint_type = EP_PUT;
ns_set_close_on_exec(conn->endpoint.fd);
range = mg_get_header(&conn->mg_conn, "Content-Range");
conn->cl = to64(cl_hdr);
r1 = r2 = 0;
if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
conn->mg_conn.status_code = 206;
lseek(conn->endpoint.fd, r1, SEEK_SET);
conn->cl = r2 > r1 ? r2 - r1 + 1: conn->cl - r1;
}
mg_printf(&conn->mg_conn, "HTTP/1.1 %d OK\r\nContent-Length: 0\r\n\r\n",
conn->mg_conn.status_code);
}
}
static void forward_put_data(struct connection *conn) {
struct iobuf *io = &conn->ns_conn->recv_iobuf;
size_t k = conn->cl < (int64_t) io->len ? conn->cl : (int64_t) io->len; // To write
int n = write(conn->endpoint.fd, io->buf, k); // Write them!
if (n > 0) {
iobuf_remove(io, n);
conn->cl -= n;
}
if (conn->cl <= 0) {
close_local_endpoint(conn);
}
}
#endif // MONGOOSE_NO_DAV
static void send_options(struct connection *conn) {
conn->mg_conn.status_code = 200;
mg_printf(&conn->mg_conn, "%s",
"HTTP/1.1 200 OK\r\nAllow: GET, POST, HEAD, CONNECT, PUT, "
"DELETE, OPTIONS, PROPFIND, MKCOL\r\nDAV: 1\r\n\r\n");
close_local_endpoint(conn);
}
#ifndef MONGOOSE_NO_AUTH
void mg_send_digest_auth_request(struct mg_connection *c) {
struct connection *conn = MG_CONN_2_CONN(c);
c->status_code = 401;
mg_printf(c,
"HTTP/1.1 401 Unauthorized\r\n"
"WWW-Authenticate: Digest qop=\"auth\", "
"realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
conn->server->config_options[AUTH_DOMAIN],
(unsigned long) time(NULL));
close_local_endpoint(conn);
}
// Use the global passwords file, if specified by auth_gpass option,
// or search for .htpasswd in the requested directory.
static FILE *open_auth_file(struct connection *conn, const char *path,
int is_directory) {
char name[MAX_PATH_SIZE];
const char *p, *gpass = conn->server->config_options[GLOBAL_AUTH_FILE];
FILE *fp = NULL;
if (gpass != NULL) {
// Use global passwords file
fp = fopen(gpass, "r");
} else if (is_directory) {
mg_snprintf(name, sizeof(name), "%s%c%s", path, '/', PASSWORDS_FILE_NAME);
fp = fopen(name, "r");
} else {
// Try to find .htpasswd in requested directory.
if ((p = strrchr(path, '/')) == NULL) p = path;
mg_snprintf(name, sizeof(name), "%.*s%c%s",
(int) (p - path), path, '/', PASSWORDS_FILE_NAME);
fp = fopen(name, "r");
}
return fp;
}
#if !defined(HAVE_MD5) && !defined(MONGOOSE_NO_AUTH)
typedef struct MD5Context {
uint32_t buf[4];
uint32_t bits[2];
unsigned char in[64];
} MD5_CTX;
static void byteReverse(unsigned char *buf, unsigned longs) {
uint32_t t;
// Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN
if (is_big_endian()) {
do {
t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
((unsigned) buf[1] << 8 | buf[0]);
* (uint32_t *) buf = t;
buf += 4;
} while (--longs);
}
}
#define F1(x, y, z) (z ^ (x & (y ^ z)))
#define F2(x, y, z) F1(z, x, y)
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))
#define MD5STEP(f, w, x, y, z, data, s) \
( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
// Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
// initialization constants.
static void MD5Init(MD5_CTX *ctx) {
ctx->buf[0] = 0x67452301;
ctx->buf[1] = 0xefcdab89;
ctx->buf[2] = 0x98badcfe;
ctx->buf[3] = 0x10325476;
ctx->bits[0] = 0;
ctx->bits[1] = 0;
}
static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
register uint32_t a, b, c, d;
a = buf[0];
b = buf[1];
c = buf[2];
d = buf[3];
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
buf[0] += a;
buf[1] += b;
buf[2] += c;
buf[3] += d;
}
static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
uint32_t t;
t = ctx->bits[0];
if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
ctx->bits[1]++;
ctx->bits[1] += len >> 29;
t = (t >> 3) & 0x3f;
if (t) {
unsigned char *p = (unsigned char *) ctx->in + t;
t = 64 - t;
if (len < t) {
memcpy(p, buf, len);
return;
}
memcpy(p, buf, t);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
buf += t;
len -= t;
}
while (len >= 64) {
memcpy(ctx->in, buf, 64);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
buf += 64;
len -= 64;
}
memcpy(ctx->in, buf, len);
}
static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
unsigned count;
unsigned char *p;
uint32_t *a;
count = (ctx->bits[0] >> 3) & 0x3F;
p = ctx->in + count;
*p++ = 0x80;
count = 64 - 1 - count;
if (count < 8) {
memset(p, 0, count);
byteReverse(ctx->in, 16);
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
memset(ctx->in, 0, 56);
} else {
memset(p, 0, count - 8);
}
byteReverse(ctx->in, 14);
a = (uint32_t *)ctx->in;
a[14] = ctx->bits[0];
a[15] = ctx->bits[1];
MD5Transform(ctx->buf, (uint32_t *) ctx->in);
byteReverse((unsigned char *) ctx->buf, 4);
memcpy(digest, ctx->buf, 16);
memset((char *) ctx, 0, sizeof(*ctx));
}
#endif // !HAVE_MD5
// Stringify binary data. Output buffer must be twice as big as input,
// because each byte takes 2 bytes in string representation
static void bin2str(char *to, const unsigned char *p, size_t len) {
static const char *hex = "0123456789abcdef";
for (; len--; p++) {
*to++ = hex[p[0] >> 4];
*to++ = hex[p[0] & 0x0f];
}
*to = '\0';
}
// Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
char *mg_md5(char buf[33], ...) {
unsigned char hash[16];
const char *p;
va_list ap;
MD5_CTX ctx;
MD5Init(&ctx);
va_start(ap, buf);
while ((p = va_arg(ap, const char *)) != NULL) {
MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
}
va_end(ap);
MD5Final(hash, &ctx);
bin2str(buf, hash, sizeof(hash));
return buf;
}
// Check the user's password, return 1 if OK
static int check_password(const char *method, const char *ha1, const char *uri,
const char *nonce, const char *nc, const char *cnonce,
const char *qop, const char *response) {
char ha2[32 + 1], expected_response[32 + 1];
#if 0
// Check for authentication timeout
if ((unsigned long) time(NULL) - (unsigned long) to64(nonce) > 3600 * 2) {
return 0;
}
#endif
mg_md5(ha2, method, ":", uri, NULL);
mg_md5(expected_response, ha1, ":", nonce, ":", nc,
":", cnonce, ":", qop, ":", ha2, NULL);
return mg_strcasecmp(response, expected_response) == 0 ? MG_TRUE : MG_FALSE;
}
// Authorize against the opened passwords file. Return 1 if authorized.
int mg_authorize_digest(struct mg_connection *c, FILE *fp) {
struct connection *conn = MG_CONN_2_CONN(c);
const char *hdr;
char line[256], f_user[256], ha1[256], f_domain[256], user[100], nonce[100],
uri[MAX_REQUEST_SIZE], cnonce[100], resp[100], qop[100], nc[100];
if (c == NULL || fp == NULL) return 0;
if ((hdr = mg_get_header(c, "Authorization")) == NULL ||
mg_strncasecmp(hdr, "Digest ", 7) != 0) return 0;
if (!mg_parse_header(hdr, "username", user, sizeof(user))) return 0;
if (!mg_parse_header(hdr, "cnonce", cnonce, sizeof(cnonce))) return 0;
if (!mg_parse_header(hdr, "response", resp, sizeof(resp))) return 0;
if (!mg_parse_header(hdr, "uri", uri, sizeof(uri))) return 0;
if (!mg_parse_header(hdr, "qop", qop, sizeof(qop))) return 0;
if (!mg_parse_header(hdr, "nc", nc, sizeof(nc))) return 0;
if (!mg_parse_header(hdr, "nonce", nonce, sizeof(nonce))) return 0;
while (fgets(line, sizeof(line), fp) != NULL) {
if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) == 3 &&
!strcmp(user, f_user) &&
// NOTE(lsm): due to a bug in MSIE, we do not compare URIs
!strcmp(conn->server->config_options[AUTH_DOMAIN], f_domain))
return check_password(c->request_method, ha1, uri,
nonce, nc, cnonce, qop, resp);
}
return MG_FALSE;
}
// Return 1 if request is authorised, 0 otherwise.
static int is_authorized(struct connection *conn, const char *path,
int is_directory) {
FILE *fp;
int authorized = MG_TRUE;
if ((fp = open_auth_file(conn, path, is_directory)) != NULL) {
authorized = mg_authorize_digest(&conn->mg_conn, fp);
fclose(fp);
}
return authorized;
}
static int is_authorized_for_dav(struct connection *conn) {
const char *auth_file = conn->server->config_options[DAV_AUTH_FILE];
const char *method = conn->mg_conn.request_method;
FILE *fp;
int authorized = MG_FALSE;
// If dav_auth_file is not set, allow non-authorized PROPFIND
if (method != NULL && !strcmp(method, "PROPFIND") && auth_file == NULL) {
authorized = MG_TRUE;
} else if (auth_file != NULL && (fp = fopen(auth_file, "r")) != NULL) {
authorized = mg_authorize_digest(&conn->mg_conn, fp);
fclose(fp);
}
return authorized;
}
static int is_dav_request(const struct connection *conn) {
const char *s = conn->mg_conn.request_method;
return !strcmp(s, "PUT") || !strcmp(s, "DELETE") ||
!strcmp(s, "MKCOL") || !strcmp(s, "PROPFIND");
}
#endif // MONGOOSE_NO_AUTH
static int parse_header(const char *str, int str_len, const char *var_name,
char *buf, size_t buf_size) {
int ch = ' ', len = 0, n = strlen(var_name);
const char *p, *end = str + str_len, *s = NULL;
if (buf != NULL && buf_size > 0) buf[0] = '\0';
// Find where variable starts
for (s = str; s != NULL && s + n < end; s++) {
if ((s == str || s[-1] == ' ' || s[-1] == ',') && s[n] == '=' &&
!memcmp(s, var_name, n)) break;
}
if (s != NULL && &s[n + 1] < end) {
s += n + 1;
if (*s == '"' || *s == '\'') ch = *s++;
p = s;
while (p < end && p[0] != ch && p[0] != ',' && len < (int) buf_size) {
if (p[0] == '\\' && p[1] == ch) p++;
buf[len++] = *p++;
}
if (len >= (int) buf_size || (ch != ' ' && *p != ch)) {
len = 0;
} else {
if (len > 0 && s[len - 1] == ',') len--;
if (len > 0 && s[len - 1] == ';') len--;
buf[len] = '\0';
}
}
return len;
}
int mg_parse_header(const char *s, const char *var_name, char *buf,
size_t buf_size) {
return parse_header(s, s == NULL ? 0 : strlen(s), var_name, buf, buf_size);
}
#ifndef MONGOOSE_NO_SSI
static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
static void send_file_data(struct mg_connection *conn, FILE *fp) {
char buf[IOBUF_SIZE];
int n;
while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
mg_write(conn, buf, n);
}
}
static void do_ssi_include(struct mg_connection *conn, const char *ssi,
char *tag, int include_level) {
char file_name[IOBUF_SIZE], path[MAX_PATH_SIZE], *p;
char **opts = (MG_CONN_2_CONN(conn))->server->config_options;
FILE *fp;
// sscanf() is safe here, since send_ssi_file() also uses buffer
// of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
// File name is relative to the webserver root
mg_snprintf(path, sizeof(path), "%s%c%s",
opts[DOCUMENT_ROOT], '/', file_name);
} else if (sscanf(tag, " abspath=\"%[^\"]\"", file_name) == 1) {
// File name is relative to the webserver working directory
// or it is absolute system path
mg_snprintf(path, sizeof(path), "%s", file_name);
} else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1 ||
sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
// File name is relative to the currect document
mg_snprintf(path, sizeof(path), "%s", ssi);
if ((p = strrchr(path, '/')) != NULL) {
p[1] = '\0';
}
mg_snprintf(path + strlen(path), sizeof(path) - strlen(path), "%s",
file_name);
} else {
mg_printf(conn, "Bad SSI #include: [%s]", tag);
return;
}
if ((fp = fopen(path, "rb")) == NULL) {
mg_printf(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
tag, path, strerror(errno));
} else {
ns_set_close_on_exec(fileno(fp));
if (mg_match_prefix(opts[SSI_PATTERN], strlen(opts[SSI_PATTERN]),
path) > 0) {
send_ssi_file(conn, path, fp, include_level + 1);
} else {
send_file_data(conn, fp);
}
fclose(fp);
}
}
#ifndef MONGOOSE_NO_POPEN
static void do_ssi_exec(struct mg_connection *conn, char *tag) {
char cmd[IOBUF_SIZE];
FILE *fp;
if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
mg_printf(conn, "Bad SSI #exec: [%s]", tag);
} else if ((fp = popen(cmd, "r")) == NULL) {
mg_printf(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(errno));
} else {
send_file_data(conn, fp);
pclose(fp);
}
}
#endif // !MONGOOSE_NO_POPEN
static void send_ssi_file(struct mg_connection *conn, const char *path,
FILE *fp, int include_level) {
char buf[IOBUF_SIZE];
int ch, offset, len, in_ssi_tag;
if (include_level > 10) {
mg_printf(conn, "SSI #include level is too deep (%s)", path);
return;
}
in_ssi_tag = len = offset = 0;
while ((ch = fgetc(fp)) != EOF) {
if (in_ssi_tag && ch == '>') {
in_ssi_tag = 0;
buf[len++] = (char) ch;
buf[len] = '\0';
assert(len <= (int) sizeof(buf));
if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
// Not an SSI tag, pass it
(void) mg_write(conn, buf, (size_t) len);
} else {
if (!memcmp(buf + 5, "include", 7)) {
do_ssi_include(conn, path, buf + 12, include_level);
#if !defined(MONGOOSE_NO_POPEN)
} else if (!memcmp(buf + 5, "exec", 4)) {
do_ssi_exec(conn, buf + 9);
#endif // !NO_POPEN
} else {
mg_printf(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
}
}
len = 0;
} else if (in_ssi_tag) {
if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
// Not an SSI tag
in_ssi_tag = 0;
} else if (len == (int) sizeof(buf) - 2) {
mg_printf(conn, "%s: SSI tag is too large", path);
len = 0;
}
buf[len++] = ch & 0xff;
} else if (ch == '<') {
in_ssi_tag = 1;
if (len > 0) {
mg_write(conn, buf, (size_t) len);
}
len = 0;
buf[len++] = ch & 0xff;
} else {
buf[len++] = ch & 0xff;
if (len == (int) sizeof(buf)) {
mg_write(conn, buf, (size_t) len);
len = 0;
}
}
}
// Send the rest of buffered data
if (len > 0) {
mg_write(conn, buf, (size_t) len);
}
}
static void handle_ssi_request(struct connection *conn, const char *path) {
FILE *fp;
struct vec mime_vec;
if ((fp = fopen(path, "rb")) == NULL) {
send_http_error(conn, 500, "fopen(%s): %s", path, strerror(errno));
} else {
ns_set_close_on_exec(fileno(fp));
get_mime_type(conn->server, path, &mime_vec);
conn->mg_conn.status_code = 200;
mg_printf(&conn->mg_conn,
"HTTP/1.1 %d OK\r\n"
"Content-Type: %.*s\r\n"
"Connection: close\r\n\r\n",
conn->mg_conn.status_code, (int) mime_vec.len, mime_vec.ptr);
send_ssi_file(&conn->mg_conn, path, fp, 0);
fclose(fp);
close_local_endpoint(conn);
}
}
#endif
static void proxy_request(struct ns_connection *pc, struct mg_connection *c) {
int i, sent_close_header = 0;
ns_printf(pc, "%s %s%s%s HTTP/%s\r\n", c->request_method, c->uri,
c->query_string ? "?" : "",
c->query_string ? c->query_string : "",
c->http_version);
for (i = 0; i < c->num_headers; i++) {
if (mg_strcasecmp(c->http_headers[i].name, "Connection") == 0) {
// Force connection close, cause we don't parse proxy replies
// therefore we don't know message boundaries
ns_printf(pc, "%s: %s\r\n", "Connection", "close");
sent_close_header = 1;
} else {
ns_printf(pc, "%s: %s\r\n", c->http_headers[i].name,
c->http_headers[i].value);
}
}
if (!sent_close_header) {
ns_printf(pc, "%s: %s\r\n", "Connection", "close");
}
ns_printf(pc, "%s", "\r\n");
ns_send(pc, c->content, c->content_len);
}
#ifdef NS_ENABLE_SSL
int mg_terminate_ssl(struct mg_connection *c, const char *cert) {
static const char ok[] = "HTTP/1.0 200 OK\r\n\r\n";
struct connection *conn = MG_CONN_2_CONN(c);
SSL_CTX *ctx;
DBG(("%p MITM", conn));
if ((ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) return 0;
SSL_CTX_use_certificate_file(ctx, cert, 1);
SSL_CTX_use_PrivateKey_file(ctx, cert, 1);
SSL_CTX_use_certificate_chain_file(ctx, cert);
// When clear-text reply is pushed to client, switch to SSL mode.
// TODO(lsm): check for send() failure
send(conn->ns_conn->sock, ok, sizeof(ok) - 1, 0);
//DBG(("%p %lu %d SEND", c, (unsigned long) sizeof(ok) - 1, n));
conn->ns_conn->send_iobuf.len = 0;
conn->endpoint_type = EP_USER; // To keep-alive in close_local_endpoint()
close_local_endpoint(conn); // Clean up current CONNECT request
if ((conn->ns_conn->ssl = SSL_new(ctx)) != NULL) {
SSL_set_fd(conn->ns_conn->ssl, conn->ns_conn->sock);
}
SSL_CTX_free(ctx);
return 1;
}
#endif
int mg_forward(struct mg_connection *c, const char *addr) {
static const char ok[] = "HTTP/1.1 200 OK\r\n\r\n";
struct connection *conn = MG_CONN_2_CONN(c);
struct ns_connection *pc;
if ((pc = ns_connect(&conn->server->ns_mgr, addr,
mg_ev_handler, conn)) == NULL) {
conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY;
return 0;
}
// Interlink two connections
pc->flags |= MG_PROXY_CONN;
conn->endpoint_type = EP_PROXY;
conn->endpoint.nc = pc;
DBG(("%p [%s] [%s] -> %p %p", conn, c->uri, addr, pc, conn->ns_conn->ssl));
if (strcmp(c->request_method, "CONNECT") == 0) {
// For CONNECT request, reply with 200 OK. Tunnel is established.
// TODO(lsm): check for send() failure
(void) send(conn->ns_conn->sock, ok, sizeof(ok) - 1, 0);
} else {
// Strip "http://host:port" part from the URI
if (memcmp(c->uri, "http://", 7) == 0) c->uri += 7;
while (*c->uri != '\0' && *c->uri != '/') c->uri++;
proxy_request(pc, c);
}
return 1;
}
static void proxify_connection(struct connection *conn) {
char proto[10], host[500], cert[500], addr[1000];
unsigned short port = 80;
struct mg_connection *c = &conn->mg_conn;
int n = 0;
const char *url = c->uri;
proto[0] = host[0] = cert[0] = '\0';
if (sscanf(url, "%499[^: ]:%hu%n", host, &port, &n) != 2 &&
sscanf(url, "%9[a-z]://%499[^: ]:%hu%n", proto, host, &port, &n) != 3 &&
sscanf(url, "%9[a-z]://%499[^/ ]%n", proto, host, &n) != 2) {
n = 0;
}
snprintf(addr, sizeof(addr), "%s://%s:%hu",
conn->ns_conn->ssl != NULL ? "ssl" : "tcp", host, port);
if (n <= 0 || !mg_forward(c, addr)) {
conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
}
#ifndef MONGOOSE_NO_FILESYSTEM
void mg_send_file_internal(struct mg_connection *c, const char *file_name,
file_stat_t *st, int exists,
const char *extra_headers) {
struct connection *conn = MG_CONN_2_CONN(c);
char path[MAX_PATH_SIZE];
const int is_directory = S_ISDIR(st->st_mode);
#ifndef MONGOOSE_NO_CGI
const char *cgi_pat = conn->server->config_options[CGI_PATTERN];
#else
const char *cgi_pat = DEFAULT_CGI_PATTERN;
#endif
#ifndef MONGOOSE_NO_DIRECTORY_LISTING
const char *dir_lst = conn->server->config_options[ENABLE_DIRECTORY_LISTING];
#else
const char *dir_lst = "yes";
#endif
mg_snprintf(path, sizeof(path), "%s", file_name);
if (!exists || must_hide_file(conn, path)) {
send_http_error(conn, 404, NULL);
} else if (is_directory &&
conn->mg_conn.uri[strlen(conn->mg_conn.uri) - 1] != '/') {
conn->mg_conn.status_code = 301;
mg_printf(&conn->mg_conn, "HTTP/1.1 301 Moved Permanently\r\n"
"Location: %s/\r\n\r\n", conn->mg_conn.uri);
close_local_endpoint(conn);
} else if (is_directory && !find_index_file(conn, path, sizeof(path), st)) {
if (!mg_strcasecmp(dir_lst, "yes")) {
#ifndef MONGOOSE_NO_DIRECTORY_LISTING
send_directory_listing(conn, path);
#else
send_http_error(conn, 501, NULL);
#endif
} else {
send_http_error(conn, 403, NULL);
}
} else if (mg_match_prefix(cgi_pat, strlen(cgi_pat), path) > 0) {
#if !defined(MONGOOSE_NO_CGI)
open_cgi_endpoint(conn, path);
#else
send_http_error(conn, 501, NULL);
#endif // !MONGOOSE_NO_CGI
#ifndef MONGOOSE_NO_SSI
} else if (mg_match_prefix(conn->server->config_options[SSI_PATTERN],
strlen(conn->server->config_options[SSI_PATTERN]),
path) > 0) {
handle_ssi_request(conn, path);
#endif
} else if (is_not_modified(conn, st)) {
send_http_error(conn, 304, NULL);
} else if ((conn->endpoint.fd = open(path, O_RDONLY | O_BINARY, 0)) != -1) {
// O_BINARY is required for Windows, otherwise in default text mode
// two bytes \r\n will be read as one.
open_file_endpoint(conn, path, st, extra_headers);
} else {
send_http_error(conn, 404, NULL);
}
}
void mg_send_file(struct mg_connection *c, const char *file_name,
const char *extra_headers) {
file_stat_t st;
const int exists = stat(file_name, &st) == 0;
mg_send_file_internal(c, file_name, &st, exists, extra_headers);
}
#endif // !MONGOOSE_NO_FILESYSTEM
static void open_local_endpoint(struct connection *conn, int skip_user) {
#ifndef MONGOOSE_NO_FILESYSTEM
char path[MAX_PATH_SIZE];
file_stat_t st;
int exists = 0;
#endif
// If EP_USER was set in a prev call, reset it
conn->endpoint_type = EP_NONE;
#ifndef MONGOOSE_NO_AUTH
if (conn->server->event_handler && call_user(conn, MG_AUTH) == MG_FALSE) {
mg_send_digest_auth_request(&conn->mg_conn);
return;
}
#endif
// Call URI handler if one is registered for this URI
if (skip_user == 0 && conn->server->event_handler != NULL) {
conn->endpoint_type = EP_USER;
#if MONGOOSE_POST_SIZE_LIMIT > 1
{
const char *cl = mg_get_header(&conn->mg_conn, "Content-Length");
if ((strcmp(conn->mg_conn.request_method, "POST") == 0 ||
strcmp(conn->mg_conn.request_method, "PUT") == 0) &&
(cl == NULL || to64(cl) > MONGOOSE_POST_SIZE_LIMIT)) {
send_http_error(conn, 500, "POST size > %lu",
(unsigned long) MONGOOSE_POST_SIZE_LIMIT);
}
}
#endif
return;
}
if (strcmp(conn->mg_conn.request_method, "CONNECT") == 0 ||
mg_strncasecmp(conn->mg_conn.uri, "http", 4) == 0) {
const char *enp = conn->server->config_options[ENABLE_PROXY];
if (enp == NULL || strcmp(enp, "yes") != 0) {
send_http_error(conn, 405, NULL);
} else {
proxify_connection(conn);
}
return;
}
if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) {
send_options(conn);
return;
}
#ifdef MONGOOSE_NO_FILESYSTEM
send_http_error(conn, 404, NULL);
#else
exists = convert_uri_to_file_name(conn, path, sizeof(path), &st);
if (!strcmp(conn->mg_conn.request_method, "OPTIONS")) {
send_options(conn);
} else if (conn->server->config_options[DOCUMENT_ROOT] == NULL) {
send_http_error(conn, 404, NULL);
#ifndef MONGOOSE_NO_AUTH
} else if ((!is_dav_request(conn) && !is_authorized(conn, path,
exists && S_ISDIR(st.st_mode))) ||
(is_dav_request(conn) && !is_authorized_for_dav(conn))) {
mg_send_digest_auth_request(&conn->mg_conn);
close_local_endpoint(conn);
#endif
#ifndef MONGOOSE_NO_DAV
} else if (must_hide_file(conn, path)) {
send_http_error(conn, 404, NULL);
} else if (!strcmp(conn->mg_conn.request_method, "PROPFIND")) {
handle_propfind(conn, path, &st, exists);
} else if (!strcmp(conn->mg_conn.request_method, "MKCOL")) {
handle_mkcol(conn, path);
} else if (!strcmp(conn->mg_conn.request_method, "DELETE")) {
handle_delete(conn, path);
} else if (!strcmp(conn->mg_conn.request_method, "PUT")) {
handle_put(conn, path);
#endif
} else {
mg_send_file_internal(&conn->mg_conn, path, &st, exists, NULL);
}
#endif // MONGOOSE_NO_FILESYSTEM
}
static void send_continue_if_expected(struct connection *conn) {
static const char expect_response[] = "HTTP/1.1 100 Continue\r\n\r\n";
const char *expect_hdr = mg_get_header(&conn->mg_conn, "Expect");
if (expect_hdr != NULL && !mg_strcasecmp(expect_hdr, "100-continue")) {
ns_send(conn->ns_conn, expect_response, sizeof(expect_response) - 1);
}
}
// Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
static int is_valid_uri(const char *uri) {
unsigned short n;
return uri[0] == '/' ||
strcmp(uri, "*") == 0 || // OPTIONS method can use asterisk URI
mg_strncasecmp(uri, "http", 4) == 0 || // Naive check for the absolute URI
sscanf(uri, "%*[^ :]:%hu", &n) > 0; // CONNECT method can use host:port
}
static void try_parse(struct connection *conn) {
struct iobuf *io = &conn->ns_conn->recv_iobuf;
if (conn->request_len == 0 &&
(conn->request_len = get_request_len(io->buf, io->len)) > 0) {
// If request is buffered in, remove it from the iobuf. This is because
// iobuf could be reallocated, and pointers in parsed request could
// become invalid.
conn->request = (char *) malloc(conn->request_len);
memcpy(conn->request, io->buf, conn->request_len);
//DBG(("%p [%.*s]", conn, conn->request_len, conn->request));
iobuf_remove(io, conn->request_len);
conn->request_len = parse_http_message(conn->request, conn->request_len,
&conn->mg_conn);
if (conn->request_len > 0) {
const char *cl_hdr = mg_get_header(&conn->mg_conn, "Content-Length");
conn->cl = cl_hdr == NULL ? 0 : to64(cl_hdr);
conn->mg_conn.content_len = (size_t) conn->cl;
}
}
}
static void do_proxy(struct connection *conn) {
if (0 && conn->request_len == 0) {
try_parse(conn);
DBG(("%p parsing -> %d", conn, conn->request_len));
if (conn->request_len > 0 && call_user(conn, MG_REQUEST) == MG_FALSE) {
proxy_request(conn->endpoint.nc, &conn->mg_conn);
} else if (conn->request_len < 0) {
ns_forward(conn->ns_conn, conn->endpoint.nc);
}
} else {
DBG(("%p forwarding", conn));
ns_forward(conn->ns_conn, conn->endpoint.nc);
}
}
static void on_recv_data(struct connection *conn) {
struct iobuf *io = &conn->ns_conn->recv_iobuf;
int n;
if (conn->endpoint_type == EP_PROXY) {
if (conn->endpoint.nc != NULL) do_proxy(conn);
return;
}
try_parse(conn);
DBG(("%p %d %lu %d", conn, conn->request_len, (unsigned long)io->len,
conn->ns_conn->flags));
if (conn->request_len < 0 ||
(conn->request_len > 0 && !is_valid_uri(conn->mg_conn.uri))) {
send_http_error(conn, 400, NULL);
} else if (conn->request_len == 0 && io->len > MAX_REQUEST_SIZE) {
send_http_error(conn, 413, NULL);
} else if (conn->request_len > 0 &&
strcmp(conn->mg_conn.http_version, "1.0") != 0 &&
strcmp(conn->mg_conn.http_version, "1.1") != 0) {
send_http_error(conn, 505, NULL);
} else if (conn->request_len > 0 && conn->endpoint_type == EP_NONE) {
#ifndef MONGOOSE_NO_WEBSOCKET
send_websocket_handshake_if_requested(&conn->mg_conn);
#endif
send_continue_if_expected(conn);
open_local_endpoint(conn, 0);
}
#ifndef MONGOOSE_NO_CGI
if (conn->endpoint_type == EP_CGI && conn->endpoint.nc != NULL) {
ns_forward(conn->ns_conn, conn->endpoint.nc);
}
#endif
if (conn->endpoint_type == EP_USER) {
conn->mg_conn.content = io->buf;
conn->mg_conn.content_len = io->len;
n = call_user(conn, MG_RECV);
if (n < 0) {
conn->ns_conn->flags |= NSF_FINISHED_SENDING_DATA;
} else if ((size_t) n <= io->len) {
iobuf_remove(io, n);
}
call_request_handler_if_data_is_buffered(conn);
}
#ifndef MONGOOSE_NO_DAV
if (conn->endpoint_type == EP_PUT && io->len > 0) {
forward_put_data(conn);
}
#endif
}
static void call_http_client_handler(struct connection *conn) {
//conn->mg_conn.status_code = code;
// For responses without Content-Lengh, use the whole buffer
if (conn->cl == 0) {
conn->mg_conn.content_len = conn->ns_conn->recv_iobuf.len;
}
conn->mg_conn.content = conn->ns_conn->recv_iobuf.buf;
if (call_user(conn, MG_REPLY) == MG_FALSE) {
conn->ns_conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
iobuf_remove(&conn->ns_conn->recv_iobuf, conn->mg_conn.content_len);
conn->mg_conn.status_code = 0;
conn->cl = conn->num_bytes_recv = conn->request_len = 0;
free(conn->request);
conn->request = NULL;
}
static void process_response(struct connection *conn) {
struct iobuf *io = &conn->ns_conn->recv_iobuf;
try_parse(conn);
DBG(("%p %d %lu", conn, conn->request_len, (unsigned long)io->len));
if (conn->request_len < 0 ||
(conn->request_len == 0 && io->len > MAX_REQUEST_SIZE)) {
call_http_client_handler(conn);
} else if ((int64_t) io->len >= conn->cl) {
call_http_client_handler(conn);
}
}
struct mg_connection *mg_connect(struct mg_server *server, const char *addr) {
struct ns_connection *nsconn;
struct connection *conn;
nsconn = ns_connect(&server->ns_mgr, addr, mg_ev_handler, NULL);
if (nsconn == NULL) return 0;
if ((conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) {
nsconn->flags |= NSF_CLOSE_IMMEDIATELY;
return 0;
}
// Interlink two structs
conn->ns_conn = nsconn;
nsconn->user_data = conn;
conn->server = server;
conn->endpoint_type = EP_CLIENT;
//conn->handler = handler;
conn->mg_conn.server_param = server->ns_mgr.user_data;
conn->ns_conn->flags = NSF_CONNECTING;
return &conn->mg_conn;
}
#ifndef MONGOOSE_NO_LOGGING
static void log_header(const struct mg_connection *conn, const char *header,
FILE *fp) {
const char *header_value;
if ((header_value = mg_get_header(conn, header)) == NULL) {
(void) fprintf(fp, "%s", " -");
} else {
(void) fprintf(fp, " \"%s\"", header_value);
}
}
static void log_access(const struct connection *conn, const char *path) {
const struct mg_connection *c = &conn->mg_conn;
FILE *fp = (path == NULL) ? NULL : fopen(path, "a+");
char date[64], user[100];
time_t now;
if (fp == NULL) return;
now = time(NULL);
strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z", localtime(&now));
flockfile(fp);
mg_parse_header(mg_get_header(&conn->mg_conn, "Authorization"), "username",
user, sizeof(user));
fprintf(fp, "%s - %s [%s] \"%s %s%s%s HTTP/%s\" %d 0",
c->remote_ip, user[0] == '\0' ? "-" : user, date,
c->request_method ? c->request_method : "-",
c->uri ? c->uri : "-", c->query_string ? "?" : "",
c->query_string ? c->query_string : "",
c->http_version, c->status_code);
log_header(c, "Referer", fp);
log_header(c, "User-Agent", fp);
fputc('\n', fp);
fflush(fp);
funlockfile(fp);
fclose(fp);
}
#endif
static void close_local_endpoint(struct connection *conn) {
struct mg_connection *c = &conn->mg_conn;
// Must be done before free()
int keep_alive = should_keep_alive(&conn->mg_conn) &&
(conn->endpoint_type == EP_FILE || conn->endpoint_type == EP_USER);
DBG(("%p %d %d %d", conn, conn->endpoint_type, keep_alive,
conn->ns_conn->flags));
switch (conn->endpoint_type) {
case EP_PUT:
case EP_FILE:
close(conn->endpoint.fd);
break;
case EP_CGI:
case EP_PROXY:
if (conn->endpoint.nc != NULL) {
DBG(("%p %p %p :-)", conn, conn->ns_conn, conn->endpoint.nc));
conn->endpoint.nc->flags |= NSF_CLOSE_IMMEDIATELY;
conn->endpoint.nc->user_data = NULL;
}
break;
default: break;
}
#ifndef MONGOOSE_NO_LOGGING
if (c->status_code > 0 && conn->endpoint_type != EP_CLIENT &&
c->status_code != 400) {
log_access(conn, conn->server->config_options[ACCESS_LOG_FILE]);
}
#endif
// Gobble possible POST data sent to the URI handler
iobuf_free(&conn->ns_conn->recv_iobuf);
free(conn->request);
free(conn->path_info);
conn->endpoint.nc = NULL;
conn->request = conn->path_info = NULL;
conn->endpoint_type = EP_NONE;
conn->cl = conn->num_bytes_recv = conn->request_len = 0;
conn->ns_conn->flags &= ~(NSF_FINISHED_SENDING_DATA |
NSF_BUFFER_BUT_DONT_SEND | NSF_CLOSE_IMMEDIATELY |
MG_HEADERS_SENT | MG_LONG_RUNNING);
// Do not memset() the whole structure, as some of the fields
// (IP addresses & ports, server_param) must survive. Nullify the rest.
c->request_method = c->uri = c->http_version = c->query_string = NULL;
c->num_headers = c->status_code = c->is_websocket = c->content_len = 0;
c->connection_param = c->callback_param = NULL;
if (keep_alive) {
on_recv_data(conn); // Can call us recursively if pipelining is used
} else {
conn->ns_conn->flags |= conn->ns_conn->send_iobuf.len == 0 ?
NSF_CLOSE_IMMEDIATELY : NSF_FINISHED_SENDING_DATA;
}
}
static void transfer_file_data(struct connection *conn) {
char buf[IOBUF_SIZE];
int n;
// If output buffer is too big, don't send anything. Wait until
// mongoose drains already buffered data to the client.
if (conn->ns_conn->send_iobuf.len > sizeof(buf) * 2) return;
// Do not send anyt
n = read(conn->endpoint.fd, buf, conn->cl < (int64_t) sizeof(buf) ?
(int) conn->cl : (int) sizeof(buf));
if (n <= 0) {
close_local_endpoint(conn);
} else if (n > 0) {
conn->cl -= n;
ns_send(conn->ns_conn, buf, n);
if (conn->cl <= 0) {
close_local_endpoint(conn);
}
}
}
int mg_poll_server(struct mg_server *server, int milliseconds) {
return ns_mgr_poll(&server->ns_mgr, milliseconds);
}
void mg_destroy_server(struct mg_server **server) {
if (server != NULL && *server != NULL) {
struct mg_server *s = *server;
int i;
ns_mgr_free(&s->ns_mgr);
for (i = 0; i < (int) ARRAY_SIZE(s->config_options); i++) {
free(s->config_options[i]); // It is OK to free(NULL)
}
free(s);
*server = NULL;
}
}
struct mg_connection *mg_next(struct mg_server *s, struct mg_connection *c) {
struct ns_connection *nc = ns_next(&s->ns_mgr, c == NULL ? NULL :
MG_CONN_2_CONN(c)->ns_conn);
if (nc != NULL && nc->user_data != NULL) {
return & ((struct connection *) nc->user_data)->mg_conn;
} else {
return NULL;
}
}
static int get_var(const char *data, size_t data_len, const char *name,
char *dst, size_t dst_len) {
const char *p, *e, *s;
size_t name_len;
int len;
if (dst == NULL || dst_len == 0) {
len = -2;
} else if (data == NULL || name == NULL || data_len == 0) {
len = -1;
dst[0] = '\0';
} else {
name_len = strlen(name);
e = data + data_len;
len = -1;
dst[0] = '\0';
// data is "var1=val1&var2=val2...". Find variable first
for (p = data; p + name_len < e; p++) {
if ((p == data || p[-1] == '&') && p[name_len] == '=' &&
!mg_strncasecmp(name, p, name_len)) {
// Point p to variable value
p += name_len + 1;
// Point s to the end of the value
s = (const char *) memchr(p, '&', (size_t)(e - p));
if (s == NULL) {
s = e;
}
assert(s >= p);
// Decode variable into destination buffer
len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
// Redirect error code from -1 to -2 (destination buffer too small).
if (len == -1) {
len = -2;
}
break;
}
}
}
return len;
}
int mg_get_var(const struct mg_connection *conn, const char *name,
char *dst, size_t dst_len) {
int len = get_var(conn->query_string, conn->query_string == NULL ? 0 :
strlen(conn->query_string), name, dst, dst_len);
if (len < 0) {
len = get_var(conn->content, conn->content_len, name, dst, dst_len);
}
return len;
}
static int get_line_len(const char *buf, int buf_len) {
int len = 0;
while (len < buf_len && buf[len] != '\n') len++;
return buf[len] == '\n' ? len + 1: -1;
}
int mg_parse_multipart(const char *buf, int buf_len,
char *var_name, int var_name_len,
char *file_name, int file_name_len,
const char **data, int *data_len) {
static const char cd[] = "Content-Disposition: ";
//struct mg_connection c;
int hl, bl, n, ll, pos, cdl = sizeof(cd) - 1;
//char *p;
if (buf == NULL || buf_len <= 0) return 0;
if ((hl = get_request_len(buf, buf_len)) <= 0) return 0;
if (buf[0] != '-' || buf[1] != '-' || buf[2] == '\n') return 0;
// Get boundary length
bl = get_line_len(buf, buf_len);
// Loop through headers, fetch variable name and file name
var_name[0] = file_name[0] = '\0';
for (n = bl; (ll = get_line_len(buf + n, hl - n)) > 0; n += ll) {
if (mg_strncasecmp(cd, buf + n, cdl) == 0) {
parse_header(buf + n + cdl, ll - (cdl + 2), "name",
var_name, var_name_len);
parse_header(buf + n + cdl, ll - (cdl + 2), "filename",
file_name, file_name_len);
}
}
// Scan body, search for terminating boundary
for (pos = hl; pos + (bl - 2) < buf_len; pos++) {
if (buf[pos] == '-' && !memcmp(buf, &buf[pos], bl - 2)) {
if (data_len != NULL) *data_len = (pos - 2) - hl;
if (data != NULL) *data = buf + hl;
return pos;
}
}
return 0;
}
const char **mg_get_valid_option_names(void) {
return static_config_options;
}
void mg_copy_listeners(struct mg_server *s, struct mg_server *to) {
struct ns_connection *c;
for (c = ns_next(&s->ns_mgr, NULL); c != NULL; c = ns_next(&s->ns_mgr, c)) {
struct ns_connection *tmp;
if ((c->flags & NSF_LISTENING) &&
(tmp = (struct ns_connection *) malloc(sizeof(*tmp))) != NULL) {
memcpy(tmp, c, sizeof(*tmp));
tmp->mgr = &to->ns_mgr;
ns_add_conn(tmp->mgr, tmp);
}
}
}
static int get_option_index(const char *name) {
int i;
for (i = 0; static_config_options[i * 2] != NULL; i++) {
if (strcmp(static_config_options[i * 2], name) == 0) {
return i;
}
}
return -1;
}
static void set_default_option_values(char **opts) {
const char *value, **all_opts = mg_get_valid_option_names();
int i;
for (i = 0; all_opts[i * 2] != NULL; i++) {
value = all_opts[i * 2 + 1];
if (opts[i] == NULL && value != NULL) {
opts[i] = mg_strdup(value);
}
}
}
const char *mg_set_option(struct mg_server *server, const char *name,
const char *value) {
int ind = get_option_index(name);
const char *error_msg = NULL;
char **v = NULL;
if (ind < 0) return "No such option";
v = &server->config_options[ind];
// Return success immediately if setting to the same value
if ((*v == NULL && value == NULL) ||
(value != NULL && *v != NULL && !strcmp(value, *v))) {
return NULL;
}
if (*v != NULL) {
free(*v);
*v = NULL;
}
if (value == NULL || value[0] == '\0') return NULL;
*v = mg_strdup(value);
DBG(("%s [%s]", name, *v));
if (ind == LISTENING_PORT) {
struct vec vec;
while ((value = next_option(value, &vec, NULL)) != NULL) {
struct ns_connection *c = ns_bind(&server->ns_mgr, vec.ptr,
mg_ev_handler, NULL);
if (c== NULL) {
error_msg = "Cannot bind to port";
break;
} else {
char buf[100];
ns_sock_to_str(c->sock, buf, sizeof(buf), 2);
free(*v);
*v = mg_strdup(buf);
}
}
#ifndef MONGOOSE_NO_FILESYSTEM
} else if (ind == HEXDUMP_FILE) {
server->ns_mgr.hexdump_file = *v;
#endif
#ifndef _WIN32
} else if (ind == RUN_AS_USER) {
struct passwd *pw;
if ((pw = getpwnam(value)) == NULL) {
error_msg = "Unknown user";
} else if (setgid(pw->pw_gid) != 0) {
error_msg = "setgid() failed";
} else if (setuid(pw->pw_uid) != 0) {
error_msg = "setuid() failed";
}
#endif
}
return error_msg;
}
static void set_ips(struct ns_connection *nc, int is_rem) {
struct connection *conn = (struct connection *) nc->user_data;
struct mg_connection *c = &conn->mg_conn;
char buf[100];
ns_sock_to_str(nc->sock, buf, sizeof(buf), is_rem ? 7 : 3);
sscanf(buf, "%47[^:]:%hu",
is_rem ? c->remote_ip : c->local_ip,
is_rem ? &c->remote_port : &c->local_port);
//DBG(("%p %s %s", conn, is_rem ? "rem" : "loc", buf));
}
static void on_accept(struct ns_connection *nc, union socket_address *sa) {
struct mg_server *server = (struct mg_server *) nc->mgr;
struct connection *conn;
if (!check_acl(server->config_options[ACCESS_CONTROL_LIST],
ntohl(* (uint32_t *) &sa->sin.sin_addr)) ||
(conn = (struct connection *) calloc(1, sizeof(*conn))) == NULL) {
nc->flags |= NSF_CLOSE_IMMEDIATELY;
} else {
// Circularly link two connection structures
nc->user_data = conn;
conn->ns_conn = nc;
// Initialize the rest of connection attributes
conn->server = server;
conn->mg_conn.server_param = nc->mgr->user_data;
set_ips(nc, 1);
set_ips(nc, 0);
}
}
static void process_udp(struct ns_connection *nc) {
struct iobuf *io = &nc->recv_iobuf;
struct connection conn;
memset(&conn, 0, sizeof(conn));
conn.ns_conn = nc;
conn.server = (struct mg_server *) nc->mgr;
conn.request_len = parse_http_message(io->buf, io->len, &conn.mg_conn);
on_recv_data(&conn);
//ns_printf(nc, "%s", "HTTP/1.0 200 OK\r\n\r\n");
}
static void mg_ev_handler(struct ns_connection *nc, int ev, void *p) {
struct connection *conn = (struct connection *) nc->user_data;
// Send NS event to the handler. Note that call_user won't send an event
// if conn == NULL. Therefore, repeat this for NS_ACCEPT event as well.
#ifdef MONGOOSE_SEND_NS_EVENTS
{
struct connection *conn = (struct connection *) nc->user_data;
void *param[2] = { nc, p };
if (conn != NULL) conn->mg_conn.callback_param = param;
call_user(conn, (enum mg_event) ev);
}
#endif
switch (ev) {
case NS_ACCEPT:
on_accept(nc, (union socket_address *) p);
#ifdef MONGOOSE_SEND_NS_EVENTS
{
struct connection *conn = (struct connection *) nc->user_data;
void *param[2] = { nc, p };
if (conn != NULL) conn->mg_conn.callback_param = param;
call_user(conn, (enum mg_event) ev);
}
#endif
break;
case NS_CONNECT:
if (nc->user_data != NULL) {
set_ips(nc, 1);
set_ips(nc, 0);
}
conn->mg_conn.status_code = * (int *) p;
if (conn->mg_conn.status_code != 0 ||
(!(nc->flags & MG_PROXY_CONN) &&
call_user(conn, MG_CONNECT) == MG_FALSE)) {
nc->flags |= NSF_CLOSE_IMMEDIATELY;
}
break;
case NS_RECV:
if (conn != NULL) {
conn->num_bytes_recv += * (int *) p;
}
if (nc->flags & NSF_UDP) {
process_udp(nc);
} else if (nc->listener != NULL) {
on_recv_data(conn);
#ifndef MONGOOSE_NO_CGI
} else if (nc->flags & MG_CGI_CONN) {
on_cgi_data(nc);
#endif
} else if (nc->flags & MG_PROXY_CONN) {
if (conn != NULL) {
ns_forward(nc, conn->ns_conn);
}
} else {
process_response(conn);
}
break;
case NS_SEND:
break;
case NS_CLOSE:
nc->user_data = NULL;
if (nc->flags & (MG_CGI_CONN | MG_PROXY_CONN)) {
DBG(("%p %p closing cgi/proxy conn", conn, nc));
if (conn && conn->ns_conn) {
conn->ns_conn->flags &= ~NSF_BUFFER_BUT_DONT_SEND;
conn->ns_conn->flags |= conn->ns_conn->send_iobuf.len > 0 ?
NSF_FINISHED_SENDING_DATA : NSF_CLOSE_IMMEDIATELY;
conn->endpoint.nc = NULL;
}
} else if (conn != NULL) {
DBG(("%p %p %d closing", conn, nc, conn->endpoint_type));
if (conn->endpoint_type == EP_CLIENT && nc->recv_iobuf.len > 0) {
call_http_client_handler(conn);
}
call_user(conn, MG_CLOSE);
close_local_endpoint(conn);
conn->ns_conn = NULL;
free(conn);
}
break;
case NS_POLL:
if (conn != NULL) {
if (call_user(conn, MG_POLL) == MG_TRUE) {
if (conn->ns_conn->flags & MG_HEADERS_SENT) {
write_terminating_chunk(conn);
}
close_local_endpoint(conn);
}
if (conn->endpoint_type == EP_FILE) {
transfer_file_data(conn);
}
}
// Expire idle connections
{
time_t current_time = * (time_t *) p;
if (conn != NULL && conn->mg_conn.is_websocket) {
ping_idle_websocket_connection(conn, current_time);
}
if (nc->listener != NULL &&
nc->last_io_time + MONGOOSE_IDLE_TIMEOUT_SECONDS < current_time) {
mg_ev_handler(nc, NS_CLOSE, NULL);
nc->flags |= NSF_CLOSE_IMMEDIATELY;
}
}
break;
default:
break;
}
}
static void iter2(struct ns_connection *nc, int ev, void *param) {
mg_handler_t func = NULL;
struct connection *conn = (struct connection *) nc->user_data;
const char *msg = (const char *) param;
int n;
(void) ev;
//DBG(("%p [%s]", conn, msg));
if (sscanf(msg, "%p %n", &func, &n) && func != NULL) {
conn->mg_conn.callback_param = (void *) (msg + n);
func(&conn->mg_conn, MG_POLL);
}
}
void mg_wakeup_server_ex(struct mg_server *server, mg_handler_t cb,
const char *fmt, ...) {
va_list ap;
char buf[8 * 1024];
int len;
// Encode callback (cb) into a buffer
len = snprintf(buf, sizeof(buf), "%p ", cb);
va_start(ap, fmt);
len += vsnprintf(buf + len, sizeof(buf) - len, fmt, ap);
va_end(ap);
// "len + 1" is to include terminating \0 in the message
ns_broadcast(&server->ns_mgr, iter2, buf, len + 1);
}
void mg_wakeup_server(struct mg_server *server) {
ns_broadcast(&server->ns_mgr, NULL, (void *) "", 0);
}
const char *mg_get_option(const struct mg_server *server, const char *name) {
const char **opts = (const char **) server->config_options;
int i = get_option_index(name);
return i == -1 ? NULL : opts[i] == NULL ? "" : opts[i];
}
struct mg_server *mg_create_server(void *server_data, mg_handler_t handler) {
struct mg_server *server = (struct mg_server *) calloc(1, sizeof(*server));
ns_mgr_init(&server->ns_mgr, server_data);
set_default_option_values(server->config_options);
server->event_handler = handler;
return server;
}
Reference in New Issue Copy Permalink