Prevent integer underflow of sip regc's next registration time (#3274)

2 years ago · 31874008d1
parent 0b0488f17b
commit 31874008d1
1 changed files with 6 additions and 2 deletions
--- a/pjsip/src/pjsip-ua/sip_reg.c
+++ b/pjsip/src/pjsip-ua/sip_reg.c
@ -232,8 +232,12 @@ PJ_DEF(pj_status_t) pjsip_regc_get_info( pjsip_regc *regc,

 	next_reg = regc->next_reg;
 	pj_gettimeofday(&now);
-	PJ_TIME_VAL_SUB(next_reg, now);
-	info->next_reg = next_reg.sec;
+	if (PJ_TIME_VAL_GT(next_reg, now)) {
+	    PJ_TIME_VAL_SUB(next_reg, now);
+	    info->next_reg = next_reg.sec;
+	} else {
+	    info->next_reg = 0;
+	}
    }

    pj_lock_release(regc->lock);