static enum proto_parse_status read_channel(struct skinny_parser *parser, unsigned from, struct skinny_proto_info *info, struct cursor *curs, struct timeval const *now) { assert(from == FROM_MGR || from == FROM_STATION); if (curs->cap_len < 4+16+4) return PROTO_TOO_SHORT; uint32_t ip_version = cursor_read_u32le(curs); if (ip_version == 0) { // v4 uint32_t ip = cursor_read_u32(curs); ip_addr_ctor_from_ip4(&parser->peer[from], ip); cursor_drop(curs, 12); // this field is 16 bytes in length } else if (ip_version == 1) { // v16 ip_addr_ctor_from_ip6(&parser->peer[from], (struct in6_addr const *)curs->head); cursor_drop(curs, 16); } else { SLOG(LOG_DEBUG, "Invalid IP version (%d)", ip_version); return PROTO_PARSE_ERR; } parser->port[from] = cursor_read_u32le(curs); parser->media_set[from] = true; try_cnxtrack(parser, now); // Copy these into the info block SLOG(LOG_DEBUG, "Got media info"); info->set_values |= SKINNY_MEDIA_CNX; info->media_ip = parser->peer[from]; info->media_port = parser->port[from]; return PROTO_OK; }
static enum proto_parse_status read_channel(struct skinny_parser *parser, unsigned from, struct skinny_proto_info *info, struct cursor *curs, struct timeval const *now) { assert(from == FROM_MGR || from == FROM_STATION); if (curs->cap_len < 4+16+4) return PROTO_TOO_SHORT; uint32_t ip_version = 0; // The ip field has a 16 byte lenght on CM7 headers. We // need to drop some bytes before parsing remote port short offset_ip_port = 0; switch (info->header_ver) { case SKINNY_BASIC: break; case SKINNY_CM7_TYPE_A: case SKINNY_CM7_TYPE_B: case SKINNY_CM7_TYPE_C: ip_version = cursor_read_u32le(curs); // We drop (16 - 4) for ipv4 and (16 - 8) for ipv6 offset_ip_port = ip_version ? 8 : 12; break; } if (ip_version == 0) { // v4 uint32_t ip = cursor_read_u32(curs); ip_addr_ctor_from_ip4(&parser->peer[from], ip); } else if (ip_version == 1) { // v6 ip_addr_ctor_from_ip6(&parser->peer[from], (struct in6_addr const *)curs->head); } else { SLOG(LOG_DEBUG, "Invalid IP version (%d)", ip_version); return PROTO_PARSE_ERR; } cursor_drop(curs, offset_ip_port); parser->port[from] = cursor_read_u32le(curs); parser->media_set[from] = true; try_cnxtrack(parser, now); // Copy these into the info block SLOG(LOG_DEBUG, "Got media info"); info->set_values |= SKINNY_MEDIA_CNX; info->media_ip = parser->peer[from]; info->media_port = parser->port[from]; return PROTO_OK; }