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Ignore down interfaces at route_dst time, not when building routing table.

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The previous code to ignore down interfaces didn't account for implicit
routes that come from interface addresses and netmasks. You can force
the use of a route using a down interface with -e.
This commit is contained in:
david
2013-07-01 02:06:09 +00:00
parent b415564df9
commit 9ac1bffad2
1 changed files with 9 additions and 2 deletions
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11
libnetutil/netutil.cc
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@@ -1556,8 +1556,6 @@ static struct dnet_collector_route_nfo *sysroutes_dnet_find_interfaces(struct dn
routeaddr = &dcrn->routes[i].gw;
for (j = 0; j < numifaces; j++) {
if (!ifaces[j].device_up)
continue;
if (sockaddr_equal_netmask(&ifaces[j].addr, routeaddr, ifaces[j].netmask_bits)) {
dcrn->routes[i].device = &ifaces[j];
break;
@@ -3369,6 +3367,9 @@ static int route_dst_generic(const struct sockaddr_storage *dst,
if (iface != NULL && strcmp(loopback->devname, iface->devname) != 0)
continue;
if (iface == NULL && !loopback->device_up)
continue;
rnfo->ii = *loopback;
rnfo->direct_connect = 1;
/* But the source address we want to use is the target address. */
@@ -3389,6 +3390,9 @@ static int route_dst_generic(const struct sockaddr_storage *dst,
if (iface != NULL && strcmp(routes[i].device->devname, iface->devname) != 0)
continue;
if (iface == NULL && !routes[i].device->device_up)
continue;
rnfo->ii = *routes[i].device;
/* At this point we don't whether this route is direct or indirect ("G" flag
in netstat). We guess that a route is direct when the gateway address is
@@ -3413,6 +3417,9 @@ static int route_dst_generic(const struct sockaddr_storage *dst,
if (iface != NULL && strcmp(ifaces[i].devname, iface->devname) != 0)
continue;
if (iface == NULL && !ifaces[i].device_up)
continue;
rnfo->ii = ifaces[i];
rnfo->direct_connect = 1;
if (!spoofss) {