diff options
| author | Luca Deri <deri@ntop.org> | 2025-04-28 23:07:35 +0200 |
|---|---|---|
| committer | Luca Deri <deri@ntop.org> | 2025-04-28 23:07:35 +0200 |
| commit | b8dc84fe318d973a17cdd1be1c6cad65f960386f (patch) | |
| tree | 6f3bc287bf8ceafb08c5ba69cd876b85ebb14a91 | |
| parent | b3be9f16dc0473fdb180bce3ff026015d59a4475 (diff) | |
Improved protocol guess
| -rw-r--r-- | src/lib/ndpi_main.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/src/lib/ndpi_main.c b/src/lib/ndpi_main.c index 6cab01a80..0146f5b18 100644 --- a/src/lib/ndpi_main.c +++ b/src/lib/ndpi_main.c @@ -7804,7 +7804,6 @@ u_int16_t ndpi_guess_host_protocol_id(struct ndpi_detection_module_struct *ndpi_ addr.s_addr = flow->c_address.v4; ret = ndpi_network_port_ptree_match(ndpi_str, &addr, flow->c_port); } - } else { struct in6_addr addr; @@ -7815,7 +7814,6 @@ u_int16_t ndpi_guess_host_protocol_id(struct ndpi_detection_module_struct *ndpi_ addr = *(struct in6_addr *)&flow->c_address.v6; ret = ndpi_network_port_ptree6_match(ndpi_str, &addr, flow->c_port); } - } return(ret); @@ -10002,7 +10000,7 @@ ndpi_protocol ndpi_guess_undetected_protocol_v4(struct ndpi_detection_module_str struct ndpi_flow_struct *flow, u_int8_t proto, u_int32_t shost /* host byte order */, u_int16_t sport, u_int32_t dhost /* host byte order */, u_int16_t dport) { - u_int32_t rc; + u_int32_t rc = NDPI_PROTOCOL_UNKNOWN; ndpi_protocol ret = NDPI_PROTOCOL_NULL; u_int8_t user_defined_proto; @@ -10010,9 +10008,24 @@ ndpi_protocol ndpi_guess_undetected_protocol_v4(struct ndpi_detection_module_str return ret; if((proto == IPPROTO_TCP) || (proto == IPPROTO_UDP)) { - if(shost && dhost) - rc = ndpi_search_tcp_or_udp_raw(ndpi_str, flow, shost, dhost); - else + if(shost && dhost) { + struct in_addr addr; + u_int16_t rcode = NDPI_PROTOCOL_UNKNOWN; + + /* guess host protocol; server first */ + addr.s_addr = htonl(shost); + rcode = ndpi_network_port_ptree_match(ndpi_str, &addr, htons(sport)); + + if(rcode == NDPI_PROTOCOL_UNKNOWN) { + addr.s_addr = htonl(dhost); + rcode = ndpi_network_port_ptree_match(ndpi_str, &addr, htons(dport)); + } + + if(rcode == NDPI_PROTOCOL_UNKNOWN) + rc = ndpi_search_tcp_or_udp_raw(ndpi_str, flow, shost, dhost); + else + rc = (u_int32_t)rcode; + } else rc = NDPI_PROTOCOL_UNKNOWN; if(rc != NDPI_PROTOCOL_UNKNOWN) { |