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Get source address from interface if the route does not provide one.

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This commit is contained in:
Tobias Brunner
2010-10-12 11:11:04 +02:00
parent cd26eedc5c
commit 0ac6d2e658
1 changed files with 49 additions and 2 deletions
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src/libhydra/plugins/kernel_netlink/kernel_netlink_net.c
+49 -2
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@@ -734,6 +734,42 @@ static int get_interface_index(private_kernel_netlink_net_t *this, char* name)
return ifindex;
}
/**
* get the first non-virtual ip address on the given interface.
* returned host is a clone, has to be freed by caller.
*/
static host_t *get_interface_address(private_kernel_netlink_net_t *this,
int ifindex, int family)
{
enumerator_t *ifaces, *addrs;
iface_entry_t *iface;
addr_entry_t *addr;
host_t *ip = NULL;
this->mutex->lock(this->mutex);
ifaces = this->ifaces->create_enumerator(this->ifaces);
while (ifaces->enumerate(ifaces, &iface))
{
if (iface->ifindex == ifindex)
{
addrs = iface->addrs->create_enumerator(iface->addrs);
while (addrs->enumerate(addrs, &addr))
{
if (!addr->virtual && addr->ip->get_family(addr->ip) == family)
{
ip = addr->ip->clone(addr->ip);
break;
}
}
addrs->destroy(addrs);
break;
}
}
ifaces->destroy(ifaces);
this->mutex->unlock(this->mutex);
return ip;
}
/**
* Check if an interface with a given index is up
*/
@@ -925,8 +961,7 @@ static host_t *get_route(private_kernel_netlink_net_t *this, host_t *dest,
continue;
}
if (rta_src.ptr)
{
/* got a source address */
{ /* got a source address */
new_src = host_create_from_chunk(msg->rtm_family, rta_src, 0);
if (new_src)
{
@@ -943,6 +978,18 @@ static host_t *get_route(private_kernel_netlink_net_t *this, host_t *dest,
}
continue;
}
if (rta_oif)
{ /* no source, but an interface. Get address from it. */
new_src = get_interface_address(this, rta_oif,
msg->rtm_family);
if (new_src)
{
DESTROY_IF(src);
src = new_src;
best = msg->rtm_dst_len;
}
continue;
}
if (rta_gtw.ptr)
{ /* no source, but a gateway. Lookup source to reach gtw. */
new_gtw = host_create_from_chunk(msg->rtm_family, rta_gtw, 0);