From 09686693d35bd71187847c95c0967d4125215b97 Mon Sep 17 00:00:00 2001
From: Ondrej Zajicek <santiago@crfreenet.org>
Date: Mon, 23 Jan 2012 03:15:12 +0100
Subject: Implements handling of BSD iface arrival/departure notifications.

Thanks to Alexander V. Chernikov for original patch.
---
 sysdep/bsd/krt-sock.c | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'sysdep/bsd')

diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index f831327b..4ee5495f 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -409,6 +409,33 @@ krt_read_rt(struct ks_msg *msg, struct krt_proto *p, int scan)
     krt_got_route_async(p, e, new);
 }
 
+static void
+krt_read_ifannounce(struct ks_msg *msg)
+{
+  struct if_announcemsghdr *ifam = (struct if_announcemsghdr *)&msg->rtm;
+
+  if (ifam->ifan_what == IFAN_ARRIVAL)
+  {
+    /* Not enough info to create the iface, so we just trigger iface scan */
+    kif_request_scan();
+  }
+  else if (ifam->ifan_what == IFAN_DEPARTURE)
+  {
+    struct iface *iface = if_find_by_index(ifam->ifan_index);
+
+    /* Interface is destroyed */
+    if (!iface)
+    {
+      DBG("KRT: unknown interface (%s, #%d) going down. Ignoring\n", ifam->ifan_name, ifam->ifan_index);
+      return;
+    }
+
+    if_delete(iface);
+  }
+
+  DBG("KRT: IFANNOUNCE what: %d index %d name %s\n", ifam->ifan_what, ifam->ifan_index, ifam->ifan_name);
+}
+
 static void
 krt_read_ifinfo(struct ks_msg *msg)
 {
@@ -435,7 +462,7 @@ krt_read_ifinfo(struct ks_msg *msg)
 
   if (dl && (dl->sdl_family != AF_LINK))
   {
-    log("Ignoring strange IFINFO");
+    log(L_WARN "Ignoring strange IFINFO");
     return;
   }
 
@@ -599,6 +626,9 @@ krt_read_msg(struct proto *p, struct ks_msg *msg, int scan)
     case RTM_DELETE:
       krt_read_rt(msg, (struct krt_proto *)p, scan);
       break;
+    case RTM_IFANNOUNCE:
+      krt_read_ifannounce(msg);
+      break;
     case RTM_IFINFO:
       krt_read_ifinfo(msg);
       break;
-- 
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