From d33bd757d362699cfce3c68b53cd12b947d196f4 Mon Sep 17 00:00:00 2001 From: Wojciech Drewek Date: Fri, 4 Mar 2022 17:40:44 +0100 Subject: gtp: Implement GTP echo request Adding GTP device through ip link creates the situation where GTP instance is not able to send GTP echo requests. Echo requests are used to check if GTP peer is still alive. With this patch, gtp_genl_ops are extended by new cmd (GTP_CMD_ECHOREQ) which allows to send echo request in the given version of GTP protocol (v0 or v1), from the given ms address to he given peer. TID is not inclued because in all path management messages it should be equal to 0. When GTP echo response is detected, multicast message is send to everyone in the gtp_genl_family. Message contains GTP version, ms address and peer address. Suggested-by: Harald Welte Signed-off-by: Wojciech Drewek Reviewed-by: Harald Welte Signed-off-by: Tony Nguyen --- include/uapi/linux/gtp.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi') diff --git a/include/uapi/linux/gtp.h b/include/uapi/linux/gtp.h index 79f9191bbb24..2f61298a7b77 100644 --- a/include/uapi/linux/gtp.h +++ b/include/uapi/linux/gtp.h @@ -8,6 +8,7 @@ enum gtp_genl_cmds { GTP_CMD_NEWPDP, GTP_CMD_DELPDP, GTP_CMD_GETPDP, + GTP_CMD_ECHOREQ, GTP_CMD_MAX, }; -- cgit v1.2.3