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Diffstat (limited to 'src/lib/protocols/snmp.c')
-rw-r--r--src/lib/protocols/snmp.c164
1 files changed, 82 insertions, 82 deletions
diff --git a/src/lib/protocols/snmp.c b/src/lib/protocols/snmp.c
index 8b5a78bf6..902934490 100644
--- a/src/lib/protocols/snmp.c
+++ b/src/lib/protocols/snmp.c
@@ -27,99 +27,99 @@
#ifdef NDPI_PROTOCOL_SNMP
static void ndpi_int_snmp_add_connection(struct ndpi_detection_module_struct
- *ndpi_struct, struct ndpi_flow_struct *flow)
+ *ndpi_struct, struct ndpi_flow_struct *flow)
{
- ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SNMP);
+ ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SNMP, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_snmp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
- struct ndpi_packet_struct *packet = &flow->packet;
+ struct ndpi_packet_struct *packet = &flow->packet;
-// struct ndpi_id_struct *src=ndpi_struct->src;
-// struct ndpi_id_struct *dst=ndpi_struct->dst;
+ // struct ndpi_id_struct *src=ndpi_struct->src;
+ // struct ndpi_id_struct *dst=ndpi_struct->dst;
- if (packet->payload_packet_len > 32 && packet->payload[0] == 0x30) {
- int offset;
- switch (packet->payload[1]) {
- case 0x81:
- offset = 3;
- break;
- case 0x82:
- offset = 4;
- break;
- default:
- if (packet->payload[1] > 0x82) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded, second byte is > 0x82\n");
- goto excl;
- }
- offset = 2;
- }
+ if (packet->payload_packet_len > 32 && packet->payload[0] == 0x30) {
+ int offset;
+ switch (packet->payload[1]) {
+ case 0x81:
+ offset = 3;
+ break;
+ case 0x82:
+ offset = 4;
+ break;
+ default:
+ if (packet->payload[1] > 0x82) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded, second byte is > 0x82\n");
+ goto excl;
+ }
+ offset = 2;
+ }
- if (get_u_int16_t(packet->payload, offset) != htons(0x0201)) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded, 0x0201 pattern not found\n");
- goto excl;
- }
+ if (get_u_int16_t(packet->payload, offset) != htons(0x0201)) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded, 0x0201 pattern not found\n");
+ goto excl;
+ }
- if (packet->payload[offset + 2] >= 0x04) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded, version > 3\n");
- goto excl;
- }
+ if (packet->payload[offset + 2] >= 0x04) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded, version > 3\n");
+ goto excl;
+ }
- if (flow->l4.udp.snmp_stage == 0) {
- if (packet->udp->dest == htons(161) || packet->udp->dest == htons(162)) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP detected due to port.\n");
- ndpi_int_snmp_add_connection(ndpi_struct, flow);
- return;
- }
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP stage 0.\n");
- if (packet->payload[offset + 2] == 3) {
- flow->l4.udp.snmp_msg_id = ntohs(get_u_int32_t(packet->payload, offset + 8));
- } else if (packet->payload[offset + 2] == 0) {
- flow->l4.udp.snmp_msg_id = get_u_int8_t(packet->payload, offset + 15);
- } else {
- flow->l4.udp.snmp_msg_id = ntohs(get_u_int16_t(packet->payload, offset + 15));
- }
- flow->l4.udp.snmp_stage = 1 + packet->packet_direction;
- return;
- } else if (flow->l4.udp.snmp_stage == 1 + packet->packet_direction) {
- if (packet->payload[offset + 2] == 0) {
- if (flow->l4.udp.snmp_msg_id != get_u_int8_t(packet->payload, offset + 15) - 1) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
- "SNMP v1 excluded, message ID doesn't match\n");
- goto excl;
- }
- }
- } else if (flow->l4.udp.snmp_stage == 2 - packet->packet_direction) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP stage 1-2.\n");
- if (packet->payload[offset + 2] == 3) {
- if (flow->l4.udp.snmp_msg_id != ntohs(get_u_int32_t(packet->payload, offset + 8))) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
- "SNMP v3 excluded, message ID doesn't match\n");
- goto excl;
- }
- } else if (packet->payload[offset + 2] == 0) {
- if (flow->l4.udp.snmp_msg_id != get_u_int8_t(packet->payload, offset + 15)) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
- "SNMP v1 excluded, message ID doesn't match\n");
- goto excl;
- }
- } else {
- if (flow->l4.udp.snmp_msg_id != ntohs(get_u_int16_t(packet->payload, offset + 15))) {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
- "SNMP v2 excluded, message ID doesn't match\n");
- goto excl;
- }
- }
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP detected.\n");
- ndpi_int_snmp_add_connection(ndpi_struct, flow);
- return;
- }
- } else {
- NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded.\n");
+ if (flow->l4.udp.snmp_stage == 0) {
+ if (packet->udp->dest == htons(161) || packet->udp->dest == htons(162)) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP detected due to port.\n");
+ ndpi_int_snmp_add_connection(ndpi_struct, flow);
+ return;
+ }
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP stage 0.\n");
+ if (packet->payload[offset + 2] == 3) {
+ flow->l4.udp.snmp_msg_id = ntohs(get_u_int32_t(packet->payload, offset + 8));
+ } else if (packet->payload[offset + 2] == 0) {
+ flow->l4.udp.snmp_msg_id = get_u_int8_t(packet->payload, offset + 15);
+ } else {
+ flow->l4.udp.snmp_msg_id = ntohs(get_u_int16_t(packet->payload, offset + 15));
+ }
+ flow->l4.udp.snmp_stage = 1 + packet->packet_direction;
+ return;
+ } else if (flow->l4.udp.snmp_stage == 1 + packet->packet_direction) {
+ if (packet->payload[offset + 2] == 0) {
+ if (flow->l4.udp.snmp_msg_id != get_u_int8_t(packet->payload, offset + 15) - 1) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
+ "SNMP v1 excluded, message ID doesn't match\n");
+ goto excl;
}
- excl:
- NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SNMP);
+ }
+ } else if (flow->l4.udp.snmp_stage == 2 - packet->packet_direction) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP stage 1-2.\n");
+ if (packet->payload[offset + 2] == 3) {
+ if (flow->l4.udp.snmp_msg_id != ntohs(get_u_int32_t(packet->payload, offset + 8))) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
+ "SNMP v3 excluded, message ID doesn't match\n");
+ goto excl;
+ }
+ } else if (packet->payload[offset + 2] == 0) {
+ if (flow->l4.udp.snmp_msg_id != get_u_int8_t(packet->payload, offset + 15)) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
+ "SNMP v1 excluded, message ID doesn't match\n");
+ goto excl;
+ }
+ } else {
+ if (flow->l4.udp.snmp_msg_id != ntohs(get_u_int16_t(packet->payload, offset + 15))) {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG,
+ "SNMP v2 excluded, message ID doesn't match\n");
+ goto excl;
+ }
+ }
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP detected.\n");
+ ndpi_int_snmp_add_connection(ndpi_struct, flow);
+ return;
+ }
+ } else {
+ NDPI_LOG(NDPI_PROTOCOL_SNMP, ndpi_struct, NDPI_LOG_DEBUG, "SNMP excluded.\n");
+ }
+ excl:
+ NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SNMP);
}
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