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* added static assert if supported, to complain if the flow struct changes Signed-off-by: lns <[email protected]>
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Original file line number | Diff line number | Diff line change |
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/* | ||
* tivoconnect.c | ||
* | ||
* Copyright (C) 2022 - 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/>. | ||
* | ||
*/ | ||
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#include "ndpi_protocol_ids.h" | ||
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#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_TIVOCONNECT | ||
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#include "ndpi_api.h" | ||
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static void ndpi_int_tivoconnect_add_connection(struct ndpi_detection_module_struct * const ndpi_struct, | ||
struct ndpi_flow_struct * const flow) | ||
{ | ||
NDPI_LOG_INFO(ndpi_struct, "found tivoconnect\n"); | ||
ndpi_set_detected_protocol(ndpi_struct, flow, | ||
NDPI_PROTOCOL_TIVOCONNECT, | ||
NDPI_PROTOCOL_UNKNOWN, | ||
NDPI_CONFIDENCE_DPI); | ||
} | ||
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static void dissect_tivoconnect_data(struct ndpi_detection_module_struct *ndpi_struct, | ||
struct ndpi_flow_struct *flow) | ||
{ | ||
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; | ||
char const * const payload = (char const *)packet->payload; | ||
size_t const payload_len = packet->payload_packet_len; | ||
char const *key = payload; | ||
char const *newline; | ||
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for (newline = ndpi_strnstr(payload, "\n", payload_len); | ||
newline != NULL; | ||
key = ++newline, | ||
newline = ndpi_strnstr(newline, "\n", payload_len - (newline - payload))) | ||
{ | ||
size_t const line_len = newline - key; | ||
char const *value = ndpi_strnstr(key, "=", line_len); | ||
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if (value == NULL) | ||
{ | ||
ndpi_set_risk(ndpi_struct, flow, NDPI_MALFORMED_PACKET, "Missing value type in TiViConnect beacon"); | ||
continue; | ||
} | ||
value++; | ||
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size_t const key_len = value - 1 - key; | ||
size_t const value_len = newline - value; | ||
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if (key_len == NDPI_STATICSTRING_LEN("identity") && | ||
strncasecmp(key, "identity", key_len) == 0) | ||
{ | ||
if (value_len >= NDPI_STATICSTRING_LEN("uuid:") && | ||
strncasecmp(value, "uuid:", NDPI_STATICSTRING_LEN("uuid:")) == 0) | ||
{ | ||
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.identity_uuid) - 1, | ||
value_len - NDPI_STATICSTRING_LEN("uuid:")); | ||
strncpy(flow->protos.tivoconnect.identity_uuid, | ||
value + NDPI_STATICSTRING_LEN("uuid:"), len); | ||
flow->protos.tivoconnect.identity_uuid[len] = '\0'; | ||
} | ||
continue; | ||
} | ||
if (key_len == NDPI_STATICSTRING_LEN("machine") && | ||
strncasecmp(key, "machine", key_len) == 0) | ||
{ | ||
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.machine) - 1, | ||
value_len); | ||
strncpy(flow->protos.tivoconnect.machine, value, len); | ||
flow->protos.tivoconnect.machine[len] = '\0'; | ||
continue; | ||
} | ||
if (key_len == NDPI_STATICSTRING_LEN("platform") && | ||
strncasecmp(key, "platform", key_len) == 0) | ||
{ | ||
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.platform) - 1, | ||
value_len); | ||
strncpy(flow->protos.tivoconnect.platform, value, len); | ||
flow->protos.tivoconnect.platform[len] = '\0'; | ||
continue; | ||
} | ||
if (key_len == NDPI_STATICSTRING_LEN("services") && | ||
strncasecmp(key, "services", key_len) == 0) | ||
{ | ||
size_t const len = ndpi_min(sizeof(flow->protos.tivoconnect.services) - 1, | ||
value_len); | ||
strncpy(flow->protos.tivoconnect.services, value, len); | ||
flow->protos.tivoconnect.services[len] = '\0'; | ||
continue; | ||
} | ||
} | ||
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if ((size_t)(key - payload) != payload_len) | ||
{ | ||
ndpi_set_risk(ndpi_struct, flow, NDPI_MALFORMED_PACKET, | ||
"TiViConnect beacon malformed packet"); | ||
} | ||
} | ||
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void ndpi_search_tivoconnect(struct ndpi_detection_module_struct *ndpi_struct, | ||
struct ndpi_flow_struct *flow) | ||
{ | ||
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; | ||
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NDPI_LOG_INFO(ndpi_struct, "search tivoconnect\n"); | ||
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if (packet->payload_packet_len >= NDPI_STATICSTRING_LEN("tivoconnect=") && | ||
strncasecmp((char const *)packet->payload, | ||
"tivoconnect=", NDPI_STATICSTRING_LEN("tivoconnect=")) == 0) | ||
{ | ||
ndpi_int_tivoconnect_add_connection(ndpi_struct, flow); | ||
} else { | ||
NDPI_EXCLUDE_PROTO(ndpi_struct, flow); | ||
return; | ||
} | ||
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dissect_tivoconnect_data(ndpi_struct, flow); | ||
} | ||
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void init_tivoconnect_dissector(struct ndpi_detection_module_struct *ndpi_struct, | ||
u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask) | ||
{ | ||
ndpi_set_bitmask_protocol_detection("TiVoConnect", ndpi_struct, detection_bitmask, *id, | ||
NDPI_PROTOCOL_TIVOCONNECT, | ||
ndpi_search_tivoconnect, | ||
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, | ||
SAVE_DETECTION_BITMASK_AS_UNKNOWN, | ||
ADD_TO_DETECTION_BITMASK | ||
); | ||
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*id += 1; | ||
} |
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