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ikev1: Unify child_updown calls when having duplicate QMs

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If a Quick mode is initiated for a CHILD_SA that is already installed
we can identify this situation and rekey the already installed CHILD_SA.

Otherwise we end up with several CHILD_SAs in state INSTALLED which
means multiple calls of child_updown are done. Unfortunately,
the deduplication code later does not call child_updown() (so up and down
were not even).

Closes strongswan/strongswan#95.
This commit is contained in:
Afschin Hormozdiary
2018-04-09 15:06:48 +02:00
committed by Tobias Brunner
parent 55cce124bf
commit e873544080
1 changed files with 17 additions and 5 deletions
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src/libcharon/sa/ikev1/tasks/quick_mode.c
+17 -5
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@@ -1005,14 +1005,25 @@ static bool has_notify_errors(private_quick_mode_t *this, message_t *message)
/**
* Check if this is a rekey for an existing CHILD_SA, reuse reqid if so
*/
static void check_for_rekeyed_child(private_quick_mode_t *this)
static void check_for_rekeyed_child(private_quick_mode_t *this, bool responder)
{
enumerator_t *enumerator, *policies;
traffic_selector_t *local, *remote;
traffic_selector_t *local, *remote, *my_ts, *other_ts;
child_sa_t *child_sa;
proposal_t *proposal;
char *name;
if (responder)
{
my_ts = this->tsr;
other_ts = this->tsi;
}
else
{
my_ts = this->tsi;
other_ts = this->tsr;
}
name = this->config->get_name(this->config);
enumerator = this->ike_sa->create_child_sa_enumerator(this->ike_sa);
while (this->reqid == 0 && enumerator->enumerate(enumerator, &child_sa))
@@ -1026,8 +1037,8 @@ static void check_for_rekeyed_child(private_quick_mode_t *this)
case CHILD_REKEYING:
policies = child_sa->create_policy_enumerator(child_sa);
if (policies->enumerate(policies, &local, &remote) &&
local->equals(local, this->tsr) &&
remote->equals(remote, this->tsi) &&
local->equals(local, my_ts) &&
remote->equals(remote, other_ts) &&
this->proposal->equals(this->proposal, proposal))
{
this->reqid = child_sa->get_reqid(child_sa);
@@ -1165,7 +1176,7 @@ METHOD(task_t, process_r, status_t,
}
}
check_for_rekeyed_child(this);
check_for_rekeyed_child(this, TRUE);
this->child_sa = child_sa_create(
this->ike_sa->get_my_host(this->ike_sa),
@@ -1366,6 +1377,7 @@ METHOD(task_t, process_i, status_t,
{
return send_notify(this, INVALID_PAYLOAD_TYPE);
}
check_for_rekeyed_child(this, FALSE);
if (!install(this))
{
return send_notify(this, NO_PROPOSAL_CHOSEN);