lynxis lazus has uploaded this change for review.

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gtp: add internal functions gtp_reqv1c/gtp_respv1c

Will be used by SGSN Context Req/Resp/Ack.

Change-Id: If1a60a2ea08b74aaf23485e036b9632f38ab4bda
---
M gtp/gtp.c
1 file changed, 27 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ggsn refs/changes/38/39238/1

diff --git a/gtp/gtp.c b/gtp/gtp.c
index 3209a64..e6180fa 100644
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
@@ -404,6 +404,18 @@
 	return 0;
 }
 
+static int gtp_reqv1c(struct gsn_t *gsn, uint32_t teic,
+		   union gtp_packet *packet, int len,
+		   const struct in_addr *inetaddr, void *cbp)
+{
+	packet->flags |= GTP1HDR_F_SEQ;
+	packet->gtp1l.h.length = hton16(len - GTP1_HEADER_SIZE_SHORT);
+	packet->gtp1l.h.seq = hton16(gsn->seq_next);
+	packet->gtp1l.h.tei = hton32(teic);
+
+	return gtp_req_transmit(gsn, 1, inetaddr, packet, len, NULL, cbp);
+}
+
 static int gtp_req(struct gsn_t *gsn, uint8_t version, struct pdp_t *pdp,
 	    union gtp_packet *packet, int len,
 	    const struct in_addr *inetaddr, void *cbp)
@@ -563,6 +575,21 @@
 	return gtp_resp(gsn, packet, len, peer, fd, seq, tid, flow, tei);
 }
 
+static int gtp_respv1c(struct gsn_t *gsn, uint16_t seq, uint32_t remote_teic,
+		       union gtp_packet *packet, int len,
+		       const struct in_addr *inetaddr)
+{
+	struct sockaddr_in peer = {};
+	peer.sin_addr = *inetaddr;
+	peer.sin_port = htons(GTP1C_PORT);
+	peer.sin_family = AF_INET;
+
+	packet->flags |= GTP1HDR_F_SEQ | GTP1HDR_F_GTP1;
+	packet->gtp1l.h.length = hton16(len - GTP1_HEADER_SIZE_SHORT);
+
+	return gtp_resp(gsn, packet, len, &peer, gsn->fd1c, seq, 0, 0, remote_teic);
+}
+
 static int gtp_notification(struct gsn_t *gsn, uint8_t version,
 		     union gtp_packet *packet, int len,
 		     const struct sockaddr_in *peer, int fd, uint16_t seq)

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