Add ability to print SIP trace

include/re_sip.h

@@ -241,6 +241,9 @@ typedef int(sip_auth_h)(char **username, char **password, const char *realm,
 typedef bool(sip_hdr_h)(const struct sip_hdr *hdr, const struct sip_msg *msg,
 			void *arg);
 typedef void(sip_keepalive_h)(int err, void *arg);
+typedef void(sip_trace_h)(bool tx, enum sip_transp tp,
+			  const struct sa *src, const struct sa *dst,
+			  const uint8_t *pkt, size_t len, void *arg);
 
 
 /* sip */
@@ -253,6 +256,7 @@ int  sip_listen(struct sip_lsnr **lsnrp, struct sip *sip, bool req,
 int  sip_debug(struct re_printf *pf, const struct sip *sip);
 int  sip_send(struct sip *sip, void *sock, enum sip_transp tp,
 	      const struct sa *dst, struct mbuf *mb);
+void sip_set_trace(struct sip *sip, sip_trace_h *traceh);
 
 
 /* transport */

src/sip/sip.c

@@ -236,3 +236,12 @@ int sip_debug(struct re_printf *pf, const struct sip *sip)
 
 	return err;
 }
+
+
+void sip_set_trace(struct sip *sip, sip_trace_h *traceh)
+{
+	if (!sip)
+		return;
+
+	sip->traceh = traceh;
+}

src/sip/sip.h

@@ -18,6 +18,7 @@ struct sip {
 	struct stun *stun;
 	char *software;
 	sip_exit_h *exith;
+	sip_trace_h *traceh;
 	void *arg;
 	bool closing;
 };

src/sip/transp.c

@@ -236,6 +236,11 @@ static void sip_recv(struct sip *sip, const struct sip_msg *msg)
 {
 	struct le *le = sip->lsnrl.head;
 
+	if (sip->traceh) {
+		sip->traceh(false, msg->tp, &msg->src, &msg->dst,
+			    msg->mb->buf, msg->mb->end, sip->arg);
+	}
+
 	while (le) {
 		struct sip_lsnr *lsnr = le->data;
 
@@ -724,6 +729,11 @@ int sip_transp_send(struct sip_connqent **qentp, struct sip *sip, void *sock,
 	if (!sip || !dst || !mb)
 		return EINVAL;
 
+	if (sip->traceh) {
+		sip->traceh(true, tp, NULL, dst,
+			    mbuf_buf(mb), mbuf_get_left(mb), sip->arg);
+	}
+
 	switch (tp) {
 
 	case SIP_TRANSP_UDP: