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Better UDP flow handling

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This commit is contained in:
Luca Deri 2019-06-21 12:14:57 +02:00
parent 3e43e77b1c
commit 179b93d625
1 changed files with 13 additions and 7 deletions
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20
src/lib/protocols/openvpn.c
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@ -89,18 +89,24 @@ void ndpi_search_openvpn(struct ndpi_detection_module_struct* ndpi_struct,
if(packet->udp) {
#ifdef DEBUG
printf("[opcode: %u][Packet ID: %d][%u <-> %u][len: %u]\n", opcode, check_pkid_and_detect_hmac_size(ovpn_payload),
printf("[packet_id: %u][opcode: %u][Packet ID: %d][%u <-> %u][len: %u]\n",
flow->num_processed_pkts,
opcode, check_pkid_and_detect_hmac_size(ovpn_payload),
htons(packet->udp->source), htons(packet->udp->dest), packet->payload_packet_len);
#endif
if(
((packet->payload_packet_len == 112) && (opcode == 168))
|| ((packet->payload_packet_len == 80)
&& ((opcode == 184) || (opcode == 88) || (opcode == 160) || (opcode == 168)))
) {
(flow->num_processed_pkts == 1)
&& (
((packet->payload_packet_len == 112)
&& ((opcode == 168) || (opcode == 192))
)
|| ((packet->payload_packet_len == 80)
&& ((opcode == 184) || (opcode == 88) || (opcode == 160) || (opcode == 168) || (opcode == 200)))
)) {
NDPI_LOG_INFO(ndpi_struct,"found openvpn\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_OPENVPN, NDPI_PROTOCOL_UNKNOWN);
return;
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_OPENVPN, NDPI_PROTOCOL_UNKNOWN);
return;
}
}