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ikev2: Fix reauthentication if peer assigns a different virtual IP 

Before this change a reqid set on the create_child_t task was used as
indicator of the CHILD_SA being rekeyed.  Only if that was not the case
would the local traffic selector be changed to 0.0.0.0/0|::/0 (as we
don't know which virtual IP the gateway will eventually assign).
On the other hand, in case of a rekeying the VIP is expected to remain
the same, so the local TS would simply equal the VIP.

Since c949a4d501 reauthenticated CHILD_SAs also have the reqid
set.  Which meant that the local TS would contain the previously
assigned VIP, basically rendering the gateway unable to assign a
different VIP to the client as the resulting TS would not match
the client's proposal anymore.

Fixes #553.
This commit is contained in:
Tobias Brunner 2014-04-15 16:00:47 +02:00
parent 37cb91d737
commit 4469e3d050
1 changed files with 1 additions and 1 deletions
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2
src/libcharon/sa/ikev2/tasks/child_create.c
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@ -950,7 +950,7 @@ METHOD(task_t, build_i, status_t,
/* check if we want a virtual IP, but don't have one */
list = linked_list_create();
peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
if (!this->reqid)
if (!this->rekey)
{
enumerator = peer_cfg->create_virtual_ip_enumerator(peer_cfg);
while (enumerator->enumerate(enumerator, &vip))