From 1bf3b3d0f9173e1a86e70dacf7e39e7daa6ccdb9 Mon Sep 17 00:00:00 2001
From: Pau Espin Pedrol <pespin@sysmocom.de>
Date: Mon, 7 Mar 2022 12:19:24 +0100
Subject: [PATCH] gtp: Log detection of rx duplicate

Change-Id: I8bc9143db6743ad4fae2fe6d6fe0417648e9eec9
---
 gtp/gtp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gtp/gtp.c b/gtp/gtp.c
index 3051255..f847e43 100644
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
@@ -827,11 +827,18 @@ static int gtp_duplicate(struct gsn_t *gsn, uint8_t version,
 		  struct sockaddr_in *peer, uint16_t seq)
 {
 	struct qmsg_t *qmsg;
+	char buf[INET_ADDRSTRLEN];
 
 	if (queue_seqget(gsn->queue_resp, &qmsg, peer, seq)) {
 		return EOF;	/* Notfound */
 	}
 
+
+	buf[0] = '\0';
+	inet_ntop(AF_INET, &peer->sin_addr, buf, sizeof(buf));
+	LOGP(DLGTP, LOGL_INFO,
+		"Rx duplicate seq=%" PRIu16 " from %s, retrans resp\n", seq, buf);
+
 	if (fcntl(qmsg->fd, F_SETFL, 0)) {
 		LOGP(DLGTP, LOGL_ERROR, "fnctl()\n");
 		return -1;