git: dd235f097af4 - main - route(8): Add prefsrc option in netlink

The branch main has been updated by pouria:

URL: https://cgit.FreeBSD.org/src/commit/?id=dd235f097af48ba5bf4324362b4fae6e14e19dfa

commit dd235f097af48ba5bf4324362b4fae6e14e19dfa
Author:     Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org>
AuthorDate: 2026-07-17 12:06:46 +0000
Commit:     Pouria Mousavizadeh Tehrani <pouria@FreeBSD.org>
CommitDate: 2026-07-28 20:54:37 +0000

    route(8): Add prefsrc option in netlink
    
    Add prefsrc option that is frequently used on unnumbered interfaces
    or L3 multi-homed network hosts.
    This option uses RTA_PREFSRC.
    Now you can add a static route by specifying the prefsrc option
    with the loopback IP.
    
    PR:             285422
    Reviewed by:    glebius
    Differential Revision: https://reviews.freebsd.org/D58294
---
 sbin/route/keywords        | 1 +
 sbin/route/route.c         | 1 +
 sbin/route/route_netlink.c | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/sbin/route/keywords b/sbin/route/keywords
index 3dbfcd187773..faf30f8adb14 100644
--- a/sbin/route/keywords
+++ b/sbin/route/keywords
@@ -36,6 +36,7 @@ nostatic
 nostick
 osi
 prefixlen
+prefsrc
 proto1
 proto2
 proxy
diff --git a/sbin/route/route.c b/sbin/route/route.c
index 84c520bd4f39..e4f15aab91b6 100644
--- a/sbin/route/route.c
+++ b/sbin/route/route.c
@@ -946,6 +946,7 @@ newroute(int argc, char **argv)
 					errx(EX_USAGE,
 					    "invalid fib number: %s", *argv);
 				break;
+			case K_PREFSRC:
 			case K_IFA:
 				if (!--argc)
 					usage(NULL);
diff --git a/sbin/route/route_netlink.c b/sbin/route/route_netlink.c
index 0d4420767082..a412265b6feb 100644
--- a/sbin/route/route_netlink.c
+++ b/sbin/route/route_netlink.c
@@ -174,6 +174,7 @@ rtmsg_nl_int(struct nl_helper *h, int cmd, int rtm_flags, int fib, int rtm_addrs
 	struct sockaddr *dst = get_addr(so, rtm_addrs, RTAX_DST);
 	struct sockaddr *mask = get_addr(so, rtm_addrs, RTAX_NETMASK);
 	struct sockaddr *gw = get_addr(so, rtm_addrs, RTAX_GATEWAY);
+	struct sockaddr *prefsrc = get_addr(so, rtm_addrs, RTAX_IFA);
 
 	if (dst == NULL)
 		return (EINVAL);
@@ -225,6 +226,7 @@ rtmsg_nl_int(struct nl_helper *h, int cmd, int rtm_flags, int fib, int rtm_addrs
 		rtm->rtm_flags = RTM_F_PREFIX;
 
 	snl_add_msg_attr_ip(&nw, RTA_DST, dst);
+	snl_add_msg_attr_ip(&nw, RTA_PREFSRC, prefsrc);
 	snl_add_msg_attr_u32(&nw, RTA_TABLE, fib);
 
 	uint32_t rta_oif = 0;