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gnetworkmonitornetlink: handle default route via device

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If the default route is via a device rather than a particular IP
address, then neither RTA_DST nor RTA_GATEWAY will be present in the
RTM_NEWROUTE message, and so GNetworkMonitorNetlink would ignore it,
and then think there was no default route. (This could happen with
certain kinds of VPNs, if they were set to route all traffic through
the VPN.)

Fix this by recognizing routes that specify RTA_OIF ("output
interface") instead of RTA_GATEWAY.

https://bugzilla.gnome.org/show_bug.cgi?id=701609
(cherry picked from commit c08ef6c165)
This commit is contained in:
Dan Winship
2013-06-04 17:29:55 -03:00
committed by David Woodhouse
parent 6d8ee5ef40
commit 2d3837563f
1 changed files with 9 additions and 9 deletions
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18
gio/gnetworkmonitornetlink.c
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@@ -219,8 +219,7 @@ static void
add_network (GNetworkMonitorNetlink *nl,
GSocketFamily family,
gint dest_len,
guint8 *dest,
guint8 *gateway)
guint8 *dest)
{
GInetAddress *dest_addr;
GInetAddressMask *network;
@@ -246,8 +245,7 @@ static void
remove_network (GNetworkMonitorNetlink *nl,
GSocketFamily family,
gint dest_len,
guint8 *dest,
guint8 *gateway)
guint8 *dest)
{
GInetAddress *dest_addr;
GInetAddressMask *network;
@@ -306,7 +304,7 @@ read_netlink_messages (GSocket *socket,
struct rtmsg *rtmsg;
struct rtattr *attr;
gsize attrlen;
guint8 *dest, *gateway;
guint8 *dest, *gateway, *oif;
gboolean retval = TRUE;
iv.buffer = NULL;
@@ -368,22 +366,24 @@ read_netlink_messages (GSocket *socket,
attrlen = NLMSG_PAYLOAD (msg, sizeof (struct rtmsg));
attr = RTM_RTA (rtmsg);
dest = gateway = NULL;
dest = gateway = oif = NULL;
while (RTA_OK (attr, attrlen))
{
if (attr->rta_type == RTA_DST)
dest = RTA_DATA (attr);
else if (attr->rta_type == RTA_GATEWAY)
gateway = RTA_DATA (attr);
else if (attr->rta_type == RTA_OIF)
oif = RTA_DATA (attr);
attr = RTA_NEXT (attr, attrlen);
}
if (dest || gateway)
if (dest || gateway || oif)
{
if (msg->nlmsg_type == RTM_NEWROUTE)
add_network (nl, rtmsg->rtm_family, rtmsg->rtm_dst_len, dest, gateway);
add_network (nl, rtmsg->rtm_family, rtmsg->rtm_dst_len, dest);
else
remove_network (nl, rtmsg->rtm_family, rtmsg->rtm_dst_len, dest, gateway);
remove_network (nl, rtmsg->rtm_family, rtmsg->rtm_dst_len, dest);
queue_request_dump (nl);
}
break;