BSD: Ensure we have a netmask when adding it to the route message

rsmarples · rsmarples · commit b31c70db2d2c · 2025-02-16T10:18:28.000Z
diff --git a/src/if-bsd.c b/src/if-bsd.c
@@ -796,7 +796,7 @@ if_route(unsigned char cmd, const struct rt *rt)
 		}
 	}
 
-	if (!(rtm->rtm_flags & RTF_HOST))
+	if (!sa_is_unspecified(&rt->rt_netmask) && !(rtm->rtm_flags & RTF_HOST))
 		rtm->rtm_addrs |= RTA_NETMASK;
 
 	if_linkaddr(&sdl, rt->rt_ifp);

Original file line number	Diff line number	Diff line change
`@@ -796,7 +796,7 @@ if_route(unsigned char cmd, const struct rt *rt)`
`796`	`796`	`}`
`797`	`797`	`}`
`798`	`798`
`799`		`- if (!(rtm->rtm_flags & RTF_HOST))`
	`799`	`+ if (!sa_is_unspecified(&rt->rt_netmask) && !(rtm->rtm_flags & RTF_HOST))`
`800`	`800`	`rtm->rtm_addrs \|= RTA_NETMASK;`
`801`	`801`
`802`	`802`	`if_linkaddr(&sdl, rt->rt_ifp);`