diff --git a/include/re_sip.h b/include/re_sip.h
index e6dd358..8d946a3 100644
--- a/include/re_sip.h
+++ b/include/re_sip.h
@@ -136,12 +136,12 @@ enum {
 
 
 struct sip_via {
-	struct pl transp;
 	struct pl sentby;
 	struct sa addr;
 	struct pl params;
 	struct pl branch;
 	struct pl val;
+	enum sip_transp tp;
 };
 
 struct sip_addr {
@@ -231,19 +231,23 @@ typedef void(sip_keepalive_h)(int err, void *arg);
 int  sip_alloc(struct sip **sipp, struct dnsc *dnsc, uint32_t ctsz,
 	       uint32_t stsz, uint32_t tcsz, const char *software,
 	       sip_exit_h *exith, void *arg);
-int  sip_transp_add(struct sip *sip, enum sip_transp tp,
-		    const struct sa *laddr, ...);
-void sip_transp_flush(struct sip *sip);
-bool sip_transp_isladdr(const struct sip *sip, enum sip_transp tp,
-			const struct sa *laddr);
 void sip_close(struct sip *sip, bool force);
 int  sip_listen(struct sip_lsnr **lsnrp, struct sip *sip, bool req,
 		sip_msg_h *msgh, void *arg);
 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);
+
+
+/* transport */
+int  sip_transp_add(struct sip *sip, enum sip_transp tp,
+		    const struct sa *laddr, ...);
+void sip_transp_flush(struct sip *sip);
+bool sip_transp_isladdr(const struct sip *sip, enum sip_transp tp,
+			const struct sa *laddr);
 const char *sip_transp_name(enum sip_transp tp);
 const char *sip_transp_param(enum sip_transp tp);
+uint16_t sip_transp_port(enum sip_transp tp, uint16_t port);
 
 
 /* request */
diff --git a/src/sip/sip.h b/src/sip/sip.h
index bbe8397..1551539 100644
--- a/src/sip/sip.h
+++ b/src/sip/sip.h
@@ -74,7 +74,6 @@ int  sip_transp_laddr(struct sip *sip, struct sa *laddr, enum sip_transp tp,
 bool sip_transp_supported(struct sip *sip, enum sip_transp tp, int af);
 const char *sip_transp_srvid(enum sip_transp tp);
 bool sip_transp_reliable(enum sip_transp tp);
-uint16_t sip_transp_port(enum sip_transp tp, uint16_t port);
 int  sip_transp_debug(struct re_printf *pf, const struct sip *sip);
 
 
diff --git a/src/sip/via.c b/src/sip/via.c
index a57b103..c99cd1d 100644
--- a/src/sip/via.c
+++ b/src/sip/via.c
@@ -28,7 +28,7 @@ static int decode_hostport(const struct pl *hostport, struct pl *host,
 
 int sip_via_decode(struct sip_via *via, const struct pl *pl)
 {
-	struct pl host, port;
+	struct pl transp, host, port;
 	int err;
 
 	if (!via || !pl)
@@ -37,11 +37,20 @@ int sip_via_decode(struct sip_via *via, const struct pl *pl)
 	err = re_regex(pl->p, pl->l,
 		       "SIP[  \t\r\n]*/[ \t\r\n]*2.0[ \t\r\n]*/[ \t\r\n]*"
 		       "[A-Z]+[ \t\r\n]*[^; \t\r\n]+[ \t\r\b]*[^]*",
-		       NULL, NULL, NULL, NULL, &via->transp,
+		       NULL, NULL, NULL, NULL, &transp,
 		       NULL, &via->sentby, NULL, &via->params);
 	if (err)
 		return err;
 
+	if (!pl_strcmp(&transp, "TCP"))
+		via->tp = SIP_TRANSP_TCP;
+	else if (!pl_strcmp(&transp, "TLS"))
+		via->tp = SIP_TRANSP_TLS;
+	else if (!pl_strcmp(&transp, "UDP"))
+		via->tp = SIP_TRANSP_UDP;
+	else
+		via->tp = SIP_TRANSP_NONE;
+
 	err = decode_hostport(&via->sentby, &host, &port);
 	if (err)
 		return err;