diff options
Diffstat (limited to 'src/lib/protocols/fbzero.c')
| -rw-r--r-- | src/lib/protocols/fbzero.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/src/lib/protocols/fbzero.c b/src/lib/protocols/fbzero.c deleted file mode 100644 index 936d99e84..000000000 --- a/src/lib/protocols/fbzero.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * 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/ */ - -#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; - ndpi_protocol_match_result ret_match; - - max_len = ndpi_min(tag_len, sizeof(flow->host_server_name)-1); - - if (data_offset + data_prev_offset + max_len >= packet->payload_packet_len) { - return; - } - 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), - &ret_match, - 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; -} - |