diff options
Diffstat (limited to 'src/lib/protocols')
| -rw-r--r-- | src/lib/protocols/fbzero.c | 132 | ||||
| -rw-r--r-- | src/lib/protocols/filetopia.c | 98 |
2 files changed, 132 insertions, 98 deletions
diff --git a/src/lib/protocols/fbzero.c b/src/lib/protocols/fbzero.c new file mode 100644 index 000000000..31acd0c9a --- /dev/null +++ b/src/lib/protocols/fbzero.c @@ -0,0 +1,132 @@ +/* + * fbzero.c + * + * Copyright (C) 2018 - ntop.org + * + * 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_protocol_ids.h" + +/* https://code.facebook.com/posts/608854979307125/building-zero-protocol-for-fast-secure-mobile-connections/ */ + +#ifdef NDPI_PROTOCOL_FBZERO + +#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_FBZERO + +#include "ndpi_api.h" + +PACK_ON +struct fbzero_tag { + char tag[4]; + u_int32_t tag_offset_len; +} PACK_OFF; + +PACK_ON +struct fbzero_header { + u_int8_t flags; + char version[3]; + u_int8_t unknown; + u_int32_t len; + char tag[4]; + u_int16_t tag_number, _pad; +} PACK_OFF; + +/* **************************************************************************** */ + +void ndpi_search_fbzero(struct ndpi_detection_module_struct *ndpi_struct, + struct ndpi_flow_struct *flow) { + struct ndpi_packet_struct *packet = &flow->packet; + + NDPI_LOG_DBG(ndpi_struct, "search FacebookZero\n"); + + if(packet->payload_packet_len > sizeof(struct fbzero_header)) { + struct fbzero_header *h = (struct fbzero_header*)packet->payload; + struct fbzero_tag *t; + u_int offset = sizeof(struct fbzero_header), i, data_offset, tag_number, data_prev_offset = 0; + + if((h->flags & 0x01) == 0) + goto fbzero_not_found; + + if((h->version[0] != 'Q') + || (h->version[1] != 'T') + || (h->version[2] != 'V')) + goto fbzero_not_found; + + if(h->unknown != 0x30) + goto fbzero_not_found; + + t = (struct fbzero_tag*)&packet->payload[offset]; + tag_number = h->tag_number; + data_offset = offset + tag_number*sizeof(struct fbzero_tag); + + if(strncmp(h->tag, "CHLO", 4)) + goto fbzero_not_found; + + for(i=0; i<h->tag_number; i++) { +#ifdef DEBUG + printf("[FBZERO] %u) %c%c%c%c\n", i, t->tag[0], t->tag[1], t->tag[2], t->tag[3]); +#endif + + offset += sizeof(struct fbzero_tag); + + if((t->tag[0] == 'S') && (t->tag[1] == 'N') + && (t->tag[2] == 'I') && (t->tag[3] == '\0')) { + char *value = (char*)&packet->payload[data_offset + data_prev_offset]; + u_int tag_len = t->tag_offset_len-data_prev_offset, max_len; + + max_len = ndpi_min(tag_len, sizeof(flow->host_server_name)-1); + + strncpy((char*)flow->host_server_name, value, max_len); + flow->host_server_name[max_len] = '\0'; + +#ifdef DEBUG + printf("[FBZERO] SNI [@%u][len: %u][%s]\n", tag_len, + t->tag_offset_len-data_prev_offset, flow->host_server_name); +#endif + + ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_FBZERO, NDPI_PROTOCOL_UNKNOWN); + + ndpi_match_host_subprotocol(ndpi_struct, flow, (char *)flow->host_server_name, + strlen((const char *)flow->host_server_name), + NDPI_PROTOCOL_FBZERO); + return; + } + + data_prev_offset = t->tag_offset_len; + t = (struct fbzero_tag*)&packet->payload[offset]; + } + + return; + } + + fbzero_not_found: + NDPI_EXCLUDE_PROTO(ndpi_struct, flow); +} + +/* **************************************************************************** */ + +void init_fbzero_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, + NDPI_PROTOCOL_BITMASK *detection_bitmask) { + ndpi_set_bitmask_protocol_detection("FacebookZero", ndpi_struct, detection_bitmask, *id, + NDPI_PROTOCOL_FBZERO, + ndpi_search_fbzero, + NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, + SAVE_DETECTION_BITMASK_AS_UNKNOWN, + ADD_TO_DETECTION_BITMASK); + *id += 1; +} + +#endif diff --git a/src/lib/protocols/filetopia.c b/src/lib/protocols/filetopia.c deleted file mode 100644 index eb3215e48..000000000 --- a/src/lib/protocols/filetopia.c +++ /dev/null @@ -1,98 +0,0 @@ -/* - * filetopia.c - * - * Copyright (C) 2009-2011 by ipoque GmbH - * Copyright (C) 2011-15 - ntop.org - * - * 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_protocol_ids.h" - -#ifdef NDPI_PROTOCOL_FILETOPIA - -#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_FILETOPIA - -#include "ndpi_api.h" - - -static void ndpi_int_filetopia_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) -{ - ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_FILETOPIA, NDPI_PROTOCOL_UNKNOWN); -} - -void ndpi_search_filetopia_tcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) -{ - struct ndpi_packet_struct *packet = &flow->packet; - - NDPI_LOG_DBG(ndpi_struct, "search Filetopia\n"); - - if (flow->l4.tcp.filetopia_stage == 0) { - if (packet->payload_packet_len >= 50 && packet->payload_packet_len <= 70 - && packet->payload[0] == 0x03 && packet->payload[1] == 0x9a - && packet->payload[3] == 0x22 && packet->payload[packet->payload_packet_len - 1] == 0x2b) { - NDPI_LOG_DBG2(ndpi_struct, "Filetopia stage 1 detected\n"); - flow->l4.tcp.filetopia_stage = 1; - return; - } - - } else if (flow->l4.tcp.filetopia_stage == 1) { - if (packet->payload_packet_len >= 100 && packet->payload[0] == 0x03 - && packet->payload[1] == 0x9a && (packet->payload[3] == 0x22 || packet->payload[3] == 0x23)) { - - int i; - for (i = 0; i < 10; i++) { // check 10 bytes for valid ASCII printable characters - if (!(packet->payload[5 + i] >= 0x20 && packet->payload[5 + i] <= 0x7e)) { - goto end_filetopia_nothing_found; - } - } - - NDPI_LOG_DBG2(ndpi_struct, "Filetopia stage 2 detected\n"); - flow->l4.tcp.filetopia_stage = 2; - return; - } - - - } else if (flow->l4.tcp.filetopia_stage == 2) { - if (packet->payload_packet_len >= 4 && packet->payload_packet_len <= 100 - && packet->payload[0] == 0x03 && packet->payload[1] == 0x9a - && (packet->payload[3] == 0x22 || packet->payload[3] == 0x23)) { - NDPI_LOG_INFO(ndpi_struct, "found Filetopia\n"); - ndpi_int_filetopia_add_connection(ndpi_struct, flow); - return; - } - - } - - end_filetopia_nothing_found: - NDPI_EXCLUDE_PROTO(ndpi_struct, flow); -} - - -void init_filetopia_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask) -{ - ndpi_set_bitmask_protocol_detection("Filetopia", ndpi_struct, detection_bitmask, *id, - NDPI_PROTOCOL_FILETOPIA, - ndpi_search_filetopia_tcp, - NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, - SAVE_DETECTION_BITMASK_AS_UNKNOWN, - ADD_TO_DETECTION_BITMASK); - *id += 1; -} - -#endif |