gprs_ns2: Pass peer/remote sockaddr argument to ns2_create_vc()

This is a preparation towards auto-creating SNS NS-VCs in SGSN role

Related: OS#3373
Change-Id: Idf92712079cd9b7e4ff2cf8df314b372d63e6e52

src/gb/gprs_ns2.c

@@ -868,12 +868,14 @@ static inline int ns2_tlv_parse(struct tlv_parsed *dec,
 /*! Create a new NS-VC based on a [received] message. Depending on the bind it might create a NSE.
  *  \param[in] bind the bind through which msg was received
  *  \param[in] msg the actual received message
+ *  \param[in] remote address of remote peer sending message
  *  \param[in] logname A name to describe the VC. E.g. ip address pair
  *  \param[out] reject A message filled to be sent back. Only used in failure cases.
  *  \param[out] success A pointer which will be set to the new VC on success
  *  \return enum value indicating the status, e.g. GPRS_NS2_CS_CREATED */
 enum ns2_cs ns2_create_vc(struct gprs_ns2_vc_bind *bind,
 			  struct msgb *msg,
+			  const struct osmo_sockaddr *remote,
 			  const char *logname,
 			  struct msgb **reject,
 			  struct gprs_ns2_vc **success)

src/gb/gprs_ns2_frgre.c

@@ -447,7 +447,7 @@ static int handle_nsfrgre_read(struct osmo_fd *bfd)
 	rc = ns2_find_vc_by_dlci(bind, dlci, &nsvc);
 	if (rc) {
 		/* VC not found */
-		rc = ns2_create_vc(bind, msg, "newconnection", &reject, &nsvc);
+		rc = ns2_create_vc(bind, msg, &saddr, "newconnection", &reject, &nsvc);
 		switch (rc) {
 		case NS2_CS_FOUND:
 			break;

src/gb/gprs_ns2_internal.h

@@ -279,6 +279,7 @@ struct gprs_ns2_vc_driver {
 
 enum ns2_cs ns2_create_vc(struct gprs_ns2_vc_bind *bind,
 			       struct msgb *msg,
+			       const struct osmo_sockaddr *remote,
 			       const char *logname,
 			       struct msgb **reject,
 			       struct gprs_ns2_vc **success);

src/gb/gprs_ns2_udp.c

@@ -231,7 +231,7 @@ static int handle_nsip_read(struct osmo_fd *bfd)
 	nsvc = gprs_ns2_nsvc_by_sockaddr_bind(bind, &saddr);
 	if (!nsvc) {
 		/* VC not found */
-		rc = ns2_create_vc(bind, msg, "newconnection", &reject, &nsvc);
+		rc = ns2_create_vc(bind, msg, &saddr, "newconnection", &reject, &nsvc);
 		switch (rc) {
 		case NS2_CS_FOUND:
 			break;