bgpd: Do not show TCP MSS if the socket is broken

Just avoid calling for TCP MSS socket option if it's not in use. Signed-off-by: Donatas Abraitis <[email protected]> (cherry picked from commit 6549755)
FRRouting · Feb 8, 2024 · 0c679ff · 0c679ff
1 parent da5aeee
commit 0c679ff
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/sockopt.c b/lib/sockopt.c
@@ -673,6 +673,9 @@ int sockopt_tcp_mss_get(int sock)
 	int tcp_maxseg = 0;
 	socklen_t tcp_maxseg_len = sizeof(tcp_maxseg);
 
+	if (sock < 0)
+		return 0;
+
 	ret = getsockopt(sock, IPPROTO_TCP, TCP_MAXSEG, &tcp_maxseg,
 			 &tcp_maxseg_len);
 	if (ret != 0) {