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ikev1: When sending fragments, use ports to decide if a non-ESP marker is added

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This is same same logic used by sender and might apply in some cases (e.g.
when initiating to port 4500).
This commit is contained in:
Tobias Brunner
2013-08-15 15:12:00 +02:00
parent e42ab08a73
commit c81a6ff907
1 changed files with 8 additions and 6 deletions
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src/libcharon/sa/ikev1/task_manager_v1.c
+8 -6
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@@ -413,7 +413,6 @@ static bool send_packet(private_task_manager_t *this, bool request,
{
bool use_frags = FALSE;
ike_cfg_t *ike_cfg;
host_t *src, *dst;
chunk_t data;
ike_cfg = this->ike_sa->get_ike_cfg(this->ike_sa);
@@ -438,14 +437,17 @@ static bool send_packet(private_task_manager_t *this, bool request,
fragment_payload_t *fragment;
u_int8_t num, count;
size_t len, frag_size;
bool nat;
/* reduce size due to non-ESP marker */
nat = this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY);
frag_size = this->frag.size - (nat ? 4 : 0);
host_t *src, *dst;
src = packet->get_source(packet);
dst = packet->get_destination(packet);
frag_size = this->frag.size;
if (dst->get_port(dst) != IKEV2_UDP_PORT &&
src->get_port(src) != IKEV2_UDP_PORT)
{ /* reduce size due to non-ESP marker */
frag_size -= 4;
}
count = (data.len / (frag_size + 1)) + 1;
DBG1(DBG_IKE, "sending IKE message with length of %zu bytes in "