From: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Date: Fri, 19 Sep 2025 12:09:01 +0000 (+0200)
Subject: selftests: mptcp: pm: get server-side flag
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=e6c35529452e658272d370535e8c1424dbb8e5d2;p=users%2Fhch%2Fmisc.git

selftests: mptcp: pm: get server-side flag

server-side info linked to the MPTCP connect/established events can now
come from the flags, in addition to the dedicated attribute.

The attribute is now deprecated -- in favour of the new flag, and will
be removed later on.

Print this info only once.

Reviewed-by: Geliang Tang <geliang@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://patch.msgid.link/20250919-net-next-mptcp-server-side-flag-v1-4-a97a5d561a8b@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/tools/testing/selftests/net/mptcp/pm_nl_ctl.c b/tools/testing/selftests/net/mptcp/pm_nl_ctl.c
index 93fea3442216..d4981b76693b 100644
--- a/tools/testing/selftests/net/mptcp/pm_nl_ctl.c
+++ b/tools/testing/selftests/net/mptcp/pm_nl_ctl.c
@@ -2,6 +2,7 @@
 
 #include <errno.h>
 #include <error.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -113,6 +114,8 @@ static int capture_events(int fd, int event_group)
 		error(1, errno, "could not join the " MPTCP_PM_EV_GRP_NAME " mcast group");
 
 	do {
+		bool server_side = false;
+
 		FD_ZERO(&rfds);
 		FD_SET(fd, &rfds);
 		res_len = NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
@@ -187,18 +190,22 @@ static int capture_events(int fd, int event_group)
 				else if (attrs->rta_type == MPTCP_ATTR_ERROR)
 					fprintf(stderr, ",error:%u", *(__u8 *)RTA_DATA(attrs));
 				else if (attrs->rta_type == MPTCP_ATTR_SERVER_SIDE)
-					fprintf(stderr, ",server_side:%u", *(__u8 *)RTA_DATA(attrs));
+					server_side = !!*(__u8 *)RTA_DATA(attrs);
 				else if (attrs->rta_type == MPTCP_ATTR_FLAGS) {
 					__u16 flags = *(__u16 *)RTA_DATA(attrs);
 
 					/* only print when present, easier */
 					if (flags & MPTCP_PM_EV_FLAG_DENY_JOIN_ID0)
 						fprintf(stderr, ",deny_join_id0:1");
+					if (flags & MPTCP_PM_EV_FLAG_SERVER_SIDE)
+						server_side = true;
 				}
 
 				attrs = RTA_NEXT(attrs, msg_len);
 			}
 		}
+		if (server_side)
+			fprintf(stderr, ",server_side:1");
 		fprintf(stderr, "\n");
 	} while (1);