diff options
Diffstat (limited to 'src/lib/protocols/socks4.c')
| -rw-r--r-- | src/lib/protocols/socks4.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/src/lib/protocols/socks4.c b/src/lib/protocols/socks4.c deleted file mode 100644 index 87bc3a634..000000000 --- a/src/lib/protocols/socks4.c +++ /dev/null @@ -1,96 +0,0 @@ -/* - * socks4.c - * - * Copyright (C) 2014 Tomasz Bujlow <tomasz@skatnet.dk> - * - * The signature is based on the Libprotoident library. - * - * This file is part of nDPI, an open source deep packet inspection - * library based on the OpenDPI and PACE technology by ipoque GmbH - * - * nDPI is free software: you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * nDPI is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public License - * along with nDPI. If not, see <http://www.gnu.org/licenses/>. - * - */ - - -#include "ndpi_api.h" - -#ifdef NDPI_PROTOCOL_SOCKS4 -static void ndpi_int_socks4_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) -{ - ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SOCKS4, NDPI_PROTOCOL_UNKNOWN); -} - -static void ndpi_check_socks4(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) -{ - struct ndpi_packet_struct *packet = &flow->packet; - u_int32_t payload_len = packet->payload_packet_len; - - /* Break after 20 packets. */ - if (flow->packet_counter > 20) { - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "Exclude SOCKS4.\n"); - NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_SOCKS4); - return; - } - - /* Check if we so far detected the protocol in the request or not. */ - if (flow->socks4_stage == 0) { - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "SOCKS4 stage 0: \n"); - - /*Octets 3 and 4 contain the port number, port 80 and 25 for now. */ - if ((payload_len == 9) && - (((packet->payload[0] == 0x04) && (packet->payload[1] == 0x01) && (packet->payload[2] == 0x00) && (packet->payload[3] == 0x50)) - || - ((packet->payload[0] == 0x04) && (packet->payload[1] == 0x01) && (packet->payload[2] == 0x00) && (packet->payload[3] == 0x19)))) { - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "Possible SOCKS4 request detected, we will look further for the response...\n"); - - /* Encode the direction of the packet in the stage, so we will know when we need to look for the response packet. */ - flow->socks4_stage = packet->packet_direction + 1; - } - - } else { - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "SOCKS4 stage %u: \n", flow->socks4_stage); - - /* At first check, if this is for sure a response packet (in another direction. If not, do nothing now and return. */ - if ((flow->socks4_stage - packet->packet_direction) == 1) { - return; - } - - /* This is a packet in another direction. Check if we find the proper response. */ - if (payload_len == 0) { - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "Found SOCKS4.\n"); - ndpi_int_socks4_add_connection(ndpi_struct, flow); - } else { - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "The reply did not seem to belong to SOCKS4, resetting the stage to 0...\n"); - flow->socks4_stage = 0; - } - - } -} - -void ndpi_search_socks4(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) -{ - struct ndpi_packet_struct *packet = &flow->packet; - - NDPI_LOG(NDPI_PROTOCOL_SOCKS4, ndpi_struct, NDPI_LOG_DEBUG, "SOCKS4 detection...\n"); - - /* skip marked packets */ - if (packet->detected_protocol_stack[0] != NDPI_PROTOCOL_SOCKS4) { - if (packet->tcp_retransmission == 0) { - ndpi_check_socks4(ndpi_struct, flow); - } - } -} - -#endif |