f065327cc1
git-svn-id: https://origsvn.digium.com/svn/libpri/trunk@101 2fbb986a-6c06-0410-b554-c9c1f0a7f128
447 lines
10 KiB
C
Executable File
447 lines
10 KiB
C
Executable File
/*
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* libpri: An implementation of Primary Rate ISDN
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*
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* Written by Mark Spencer <markster@linux-suppot.net>
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*
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* This program is confidential
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*
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* Copyright (C) 2001, Linux Support Services, Inc.
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* All Rights Reserved.
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*
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/select.h>
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#include <stdarg.h>
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#include "libpri.h"
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#include "pri_internal.h"
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#include "pri_q921.h"
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#include "pri_q931.h"
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char *pri_node2str(int node)
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{
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switch(node) {
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case PRI_UNKNOWN:
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return "Unknown node type";
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case PRI_NETWORK:
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return "Network";
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case PRI_CPE:
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return "CPE";
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default:
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return "Invalid value";
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}
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}
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char *pri_switch2str(int sw)
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{
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switch(sw) {
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case PRI_SWITCH_NI2:
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return "National ISDN";
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case PRI_SWITCH_DMS100:
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return "Nortel DMS100";
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case PRI_SWITCH_LUCENT5E:
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return "Lucent 5E";
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case PRI_SWITCH_ATT4ESS:
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return "AT&T 4ESS";
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case PRI_SWITCH_NI1:
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return "National ISDN 1";
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case PRI_SWITCH_EUROISDN_E1:
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return "EuroISDN";
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case PRI_SWITCH_GR303_EOC:
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return "GR303 EOC";
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case PRI_SWITCH_GR303_TMC:
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return "GR303 TMC";
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default:
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return "Unknown switchtype";
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}
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}
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static struct pri *__pri_new(int fd, int node, int switchtype, struct pri *master)
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{
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struct pri *p;
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p = malloc(sizeof(struct pri));
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if (p) {
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memset(p, 0, sizeof(struct pri));
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p->fd = fd;
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p->localtype = node;
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p->switchtype = switchtype;
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p->cref = 1;
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p->sapi = Q921_SAPI_CALL_CTRL;
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p->tei = 0;
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p->protodisc = Q931_PROTOCOL_DISCRIMINATOR;
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p->master = master;
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#ifdef LIBPRI_COUNTERS
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p->q921_rxcount = 0;
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p->q921_txcount = 0;
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p->q931_rxcount = 0;
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p->q931_txcount = 0;
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#endif
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if (switchtype == PRI_SWITCH_GR303_EOC) {
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p->protodisc = GR303_PROTOCOL_DISCRIMINATOR;
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p->sapi = Q921_SAPI_GR303_EOC;
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p->tei = Q921_TEI_GR303_EOC_OPS;
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p->subchannel = __pri_new(-1, node, PRI_SWITCH_GR303_EOC_PATH, p);
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if (!p->subchannel) {
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free(p);
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p = NULL;
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}
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} else if (switchtype == PRI_SWITCH_GR303_TMC) {
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p->protodisc = GR303_PROTOCOL_DISCRIMINATOR;
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p->sapi = Q921_SAPI_GR303_TMC_CALLPROC;
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p->tei = Q921_TEI_GR303_TMC_CALLPROC;
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p->subchannel = __pri_new(-1, node, PRI_SWITCH_GR303_TMC_SWITCHING, p);
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if (!p->subchannel) {
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free(p);
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p = NULL;
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}
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} else if (switchtype == PRI_SWITCH_GR303_TMC_SWITCHING) {
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p->protodisc = GR303_PROTOCOL_DISCRIMINATOR;
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p->sapi = Q921_SAPI_GR303_TMC_SWITCHING;
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p->tei = Q921_TEI_GR303_TMC_SWITCHING;
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} else if (switchtype == PRI_SWITCH_GR303_EOC_PATH) {
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p->protodisc = GR303_PROTOCOL_DISCRIMINATOR;
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p->sapi = Q921_SAPI_GR303_EOC;
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p->tei = Q921_TEI_GR303_EOC_PATH;
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}
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/* Start Q.921 layer, Wait if we're the network */
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if (p)
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q921_start(p, p->localtype == PRI_CPE);
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}
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return p;
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}
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struct pri *pri_new(int fd, int node, int switchtype)
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{
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return __pri_new(fd, node, switchtype, NULL);
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}
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char *pri_event2str(int id)
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{
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switch(id) {
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case PRI_EVENT_DCHAN_UP:
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return "D-Channel Up";
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case PRI_EVENT_DCHAN_DOWN:
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return "D-channel Down";
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case PRI_EVENT_RESTART:
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return "Restart channel";
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case PRI_EVENT_RING:
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return "Ring";
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case PRI_EVENT_CONFIG_ERR:
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return "Configuration Error";
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default:
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return "Unknown Event";
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}
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}
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pri_event *pri_check_event(struct pri *pri)
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{
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char buf[1024];
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int res;
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pri_event *e;
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res = read(pri->fd, buf, sizeof(buf));
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if (res < 0) {
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if (errno != EAGAIN)
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pri_error("Read on %d failed: %s\n", pri->fd, strerror(errno));
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return NULL;
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}
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if (!res)
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return NULL;
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/* Receive the q921 packet */
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e = q921_receive(pri, (q921_h *)buf, res);
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return e;
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}
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static int wait_pri(struct pri *pri)
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{
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struct timeval *tv, real;
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fd_set fds;
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int res;
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FD_ZERO(&fds);
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FD_SET(pri->fd, &fds);
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tv = pri_schedule_next(pri);
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if (tv) {
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gettimeofday(&real, NULL);
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real.tv_sec = tv->tv_sec - real.tv_sec;
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real.tv_usec = tv->tv_usec - real.tv_usec;
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if (real.tv_usec < 0) {
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real.tv_usec += 1000000;
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real.tv_sec -= 1;
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}
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if (real.tv_sec < 0) {
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real.tv_sec = 0;
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real.tv_usec = 0;
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}
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}
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res = select(pri->fd + 1, &fds, NULL, NULL, tv ? &real : tv);
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if (res < 0)
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return -1;
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return res;
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}
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pri_event *pri_mkerror(struct pri *pri, char *errstr)
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{
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/* Return a configuration error */
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pri->ev.err.e = PRI_EVENT_CONFIG_ERR;
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strncpy(pri->ev.err.err, errstr, sizeof(pri->ev.err.err) - 1);
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return &pri->ev;
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}
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pri_event *pri_dchannel_run(struct pri *pri, int block)
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{
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pri_event *e;
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int res;
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if (!pri)
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return NULL;
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if (block) {
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do {
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e = NULL;
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res = wait_pri(pri);
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/* Check for error / interruption */
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if (res < 0)
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return NULL;
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if (!res)
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e = pri_schedule_run(pri);
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else
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e = pri_check_event(pri);
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} while(!e);
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} else {
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e = pri_check_event(pri);
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return e;
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}
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return e;
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}
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void pri_set_debug(struct pri *pri, int debug)
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{
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if (!pri)
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return;
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pri->debug = debug;
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if (pri->subchannel)
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pri_set_debug(pri->subchannel, debug);
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}
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int pri_acknowledge(struct pri *pri, q931_call *call, int channel, int info)
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{
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if (!pri || !call)
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return -1;
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return q931_alerting(pri, call, channel, info);
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}
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int pri_proceeding(struct pri *pri, q931_call *call, int channel, int info)
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{
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if (!pri || !call)
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return -1;
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return q931_call_proceeding(pri, call, channel, info);
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}
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int pri_progress(struct pri *pri, q931_call *call, int channel, int info)
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{
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if (!pri || !call)
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return -1;
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return q931_call_progress(pri, call, channel, info);
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}
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int pri_information(struct pri *pri, q931_call *call, char digit)
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{
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if (!pri || !call)
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return -1;
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return q931_information(pri, call, digit);
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}
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void pri_destroycall(struct pri *pri, q931_call *call)
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{
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if (pri && call)
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__q931_destroycall(pri, call);
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return;
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}
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int pri_need_more_info(struct pri *pri, q931_call *call, int channel, int nonisdn)
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{
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if (!pri || !call)
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return -1;
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return q931_setup_ack(pri, call, channel, nonisdn);
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}
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int pri_answer(struct pri *pri, q931_call *call, int channel, int nonisdn)
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{
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if (!pri || !call)
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return -1;
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return q931_connect(pri, call, channel, nonisdn);
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}
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#if 0
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/* deprecated routines, use pri_hangup */
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int pri_release(struct pri *pri, q931_call *call, int cause)
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{
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if (!pri || !call)
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return -1;
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return q931_release(pri, call, cause);
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}
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int pri_disconnect(struct pri *pri, q931_call *call, int cause)
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{
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if (!pri || !call)
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return -1;
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return q931_disconnect(pri, call, cause);
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}
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#endif
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int pri_hangup(struct pri *pri, q931_call *call, int cause)
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{
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if (!pri || !call)
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return -1;
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if (cause == -1)
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/* normal clear cause */
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cause = 16;
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return q931_hangup(pri, call, cause);
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}
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int pri_reset(struct pri *pri, int channel)
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{
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if (!pri)
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return -1;
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return q931_restart(pri, channel);
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}
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q931_call *pri_new_call(struct pri *pri)
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{
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if (!pri)
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return NULL;
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return q931_new_call(pri);
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}
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void pri_dump_event(struct pri *pri, pri_event *e)
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{
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if (!pri || !e)
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return;
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pri_message("Event type: %s (%d)\n", pri_event2str(e->gen.e), e->gen.e);
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switch(e->gen.e) {
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case PRI_EVENT_DCHAN_UP:
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case PRI_EVENT_DCHAN_DOWN:
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break;
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case PRI_EVENT_CONFIG_ERR:
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pri_message("Error: %s", e->err.err);
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break;
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case PRI_EVENT_RESTART:
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pri_message("Restart on channel %d\n", e->restart.channel);
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case PRI_EVENT_RING:
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pri_message("Calling number: %s (%s, %s)\n", e->ring.callingnum, pri_plan2str(e->ring.callingplan), pri_pres2str(e->ring.callingpres));
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pri_message("Called number: %s (%s)\n", e->ring.callednum, pri_plan2str(e->ring.calledplan));
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pri_message("Channel: %d (%s) Reference number: %d\n", e->ring.channel, e->ring.flexible ? "Flexible" : "Not Flexible", e->ring.cref);
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break;
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case PRI_EVENT_HANGUP:
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pri_message("Hangup, reference number: %d, reason: %s\n", e->hangup.cref, pri_cause2str(e->hangup.cause));
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break;
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default:
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pri_message("Don't know how to dump events of type %d\n", e->gen.e);
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}
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}
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int pri_call(struct pri *pri, q931_call *c, int transmode, int channel, int exclusive,
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int nonisdn, char *caller, int callerplan, char *callername, int callerpres, char *called,
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int calledplan,int ulayer1)
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{
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if (!pri || !c)
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return -1;
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return q931_setup(pri, c, transmode, channel, exclusive, nonisdn, caller, callerplan, callername, callerpres, called, calledplan, ulayer1);
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}
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static void (*__pri_error)(char *stuff);
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static void (*__pri_message)(char *stuff);
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void pri_set_message(void (*func)(char *stuff))
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{
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__pri_message = func;
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}
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void pri_set_error(void (*func)(char *stuff))
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{
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__pri_error = func;
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}
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void pri_message(char *fmt, ...)
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{
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char tmp[1024];
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(tmp, sizeof(tmp), fmt, ap);
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va_end(ap);
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if (__pri_message)
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__pri_message(tmp);
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else
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fprintf(stdout, tmp);
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}
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void pri_error(char *fmt, ...)
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{
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char tmp[1024];
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(tmp, sizeof(tmp), fmt, ap);
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va_end(ap);
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if (__pri_error)
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__pri_error(tmp);
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else
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fprintf(stderr, tmp);
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}
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/* Set overlap mode */
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void pri_set_overlapdial(struct pri *pri,int state)
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{
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pri->overlapdial = state;
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}
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int pri_fd(struct pri *pri)
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{
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return pri->fd;
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}
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void pri_dump_info(struct pri *pri)
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{
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#ifdef LIBPRI_COUNTERS
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struct q921_frame *f;
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int q921outstanding = 0;
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#endif
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if (!pri)
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return;
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/* Might be nice to format these a little better */
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pri_message("Switchtype: %s\n", pri_switch2str(pri->switchtype));
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pri_message("Type: %s\n", pri_node2str(pri->localtype));
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#ifdef LIBPRI_COUNTERS
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/* Remember that Q921 Counters include Q931 packets (and any retransmissions) */
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pri_message("Q931 RX: %d\n", pri->q931_rxcount);
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pri_message("Q931 TX: %d\n", pri->q931_txcount);
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pri_message("Q921 RX: %d\n", pri->q921_rxcount);
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pri_message("Q921 TX: %d\n", pri->q921_txcount);
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f = pri->txqueue;
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while (f) {
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q921outstanding++;
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f = f->next;
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}
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pri_message("Q921 Outstanding: %d\n", q921outstanding);
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#endif
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pri_message("Window Length: %d/%d\n", pri->windowlen, pri->window);
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pri_message("Sentrej: %d\n", pri->sentrej);
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pri_message("SolicitFbit: %d\n", pri->solicitfbit);
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pri_message("Retrans: %d\n", pri->retrans);
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pri_message("Busy: %d\n", pri->busy);
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pri_message("Overlap Dial: %d\n", pri->overlapdial);
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}
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int pri_get_crv(struct pri *pri, q931_call *call, int *callmode)
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{
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return q931_call_getcrv(pri, call, callmode);
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}
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int pri_set_crv(struct pri *pri, q931_call *call, int crv, int callmode)
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{
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return q931_call_setcrv(pri, call, crv, callmode);
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}
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