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libipsec: check for a policy with the reqid of the SA on decapsulation

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To prevent a client from sending a packet with a source address of a different
client, we require a policy bound via reqid to the decapsulating SA.
This commit is contained in:
Martin Willi
2013-09-13 13:56:43 +02:00
parent 791fde1669
commit 96136a1229
3 changed files with 14 additions and 7 deletions
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src/libipsec/ipsec_processor.c
+4 -3
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@@ -93,7 +93,7 @@ static job_requeue_t process_inbound(private_ipsec_processor_t *this)
esp_packet_t *packet;
ipsec_sa_t *sa;
u_int8_t next_header;
u_int32_t spi;
u_int32_t spi, reqid;
packet = (esp_packet_t*)this->inbound_queue->dequeue(this->inbound_queue);
@@ -126,6 +126,7 @@ static job_requeue_t process_inbound(private_ipsec_processor_t *this)
packet->destroy(packet);
return JOB_REQUEUE_DIRECT;
}
reqid = sa->get_reqid(sa);
ipsec->sas->checkin(ipsec->sas, sa);
next_header = packet->get_next_header(packet);
@@ -139,7 +140,7 @@ static job_requeue_t process_inbound(private_ipsec_processor_t *this)
ip_packet = packet->get_payload(packet);
policy = ipsec->policies->find_by_packet(ipsec->policies,
ip_packet, TRUE);
ip_packet, TRUE, reqid);
if (policy)
{ /* TODO-IPSEC: update policy/sa stats? */
deliver_inbound(this, packet);
@@ -193,7 +194,7 @@ static job_requeue_t process_outbound(private_ipsec_processor_t *this)
packet = (ip_packet_t*)this->outbound_queue->dequeue(this->outbound_queue);
policy = ipsec->policies->find_by_packet(ipsec->policies, packet, FALSE);
policy = ipsec->policies->find_by_packet(ipsec->policies, packet, FALSE, 0);
if (!policy)
{
DBG2(DBG_ESP, "no matching outbound IPsec policy for %H == %H",