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Add infrastructure for explicit support of First Packet Classification #2488

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Jul 3, 2024
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Add infrastructure for explicit support of First Packet Classification #2488

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18 changes: 18 additions & 0 deletions example/ndpiReader.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1747,6 +1747,24 @@ static void printFlow(u_int32_t id, struct ndpi_flow_info *flow, u_int16_t threa
flow->detected_protocol) ? "Encrypted" : "ClearText");

fprintf(out, "[Confidence: %s]", ndpi_confidence_get_name(flow->confidence));

if(flow->fpc.master_protocol == NDPI_PROTOCOL_UNKNOWN) {
fprintf(out, "[FPC: %u/%s, ",
flow->fpc.app_protocol,
ndpi_get_proto_name(ndpi_thread_info[thread_id].workflow->ndpi_struct,
flow->fpc.app_protocol));
} else {
fprintf(out, "[FPC: %u.%u/%s.%s, ",
flow->fpc.master_protocol,
flow->fpc.app_protocol,
ndpi_get_proto_name(ndpi_thread_info[thread_id].workflow->ndpi_struct,
flow->fpc.master_protocol),
ndpi_get_proto_name(ndpi_thread_info[thread_id].workflow->ndpi_struct,
flow->fpc.app_protocol));
}
fprintf(out, "Confidence: %s]",
ndpi_fpc_confidence_get_name(flow->fpc.confidence));

/* If someone wants to have the num_dissector_calls variable per flow, he can print it here.
Disabled by default to avoid too many diffs in the unit tests...
*/
Expand Down
3 changes: 3 additions & 0 deletions example/reader_util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1055,6 +1055,9 @@ void process_ndpi_collected_info(struct ndpi_workflow * workflow, struct ndpi_fl
flow->risk_str = ndpi_strdup(s);

flow->confidence = flow->ndpi_flow->confidence;

flow->fpc = flow->ndpi_flow->fpc;

flow->num_dissector_calls = flow->ndpi_flow->num_dissector_calls;

ndpi_snprintf(flow->host_server_name, sizeof(flow->host_server_name), "%s",
Expand Down
1 change: 1 addition & 0 deletions example/reader_util.h
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Original file line number Diff line number Diff line change
Expand Up @@ -208,6 +208,7 @@ typedef struct ndpi_flow_info {
// result only, not used for flow identification
ndpi_protocol detected_protocol;
ndpi_confidence_t confidence;
struct ndpi_fpc_info fpc;
u_int16_t num_dissector_calls;
u_int16_t dpi_packets;

Expand Down
1 change: 1 addition & 0 deletions fuzz/fuzz_config.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -519,6 +519,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
ndpi_risk2score(static_cast<ndpi_risk_enum>(fuzzed_data.ConsumeIntegral<u_int64_t>()), &unused1, &unused2);
ndpi_http_method2str(static_cast<ndpi_http_method>(fuzzed_data.ConsumeIntegral<u_int8_t>()));
ndpi_confidence_get_name(static_cast<ndpi_confidence_t>(fuzzed_data.ConsumeIntegral<u_int8_t>()));
ndpi_fpc_confidence_get_name(static_cast<ndpi_fpc_confidence_t>(fuzzed_data.ConsumeIntegral<u_int8_t>()));
ndpi_get_proto_breed_name(static_cast<ndpi_protocol_breed_t>(fuzzed_data.ConsumeIntegral<u_int8_t>()));
ndpi_get_l4_proto_name(static_cast<ndpi_l4_proto_info>(fuzzed_data.ConsumeIntegral<u_int8_t>()));

Expand Down
9 changes: 9 additions & 0 deletions src/include/ndpi_api.h
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Original file line number Diff line number Diff line change
Expand Up @@ -627,6 +627,15 @@ extern "C" {
*/
const char* ndpi_confidence_get_name(ndpi_confidence_t confidence);

/**
* Get FPC confidence as string
*
* @par confidence = the confidence value
* @return the string name of the confidence result
*
*/
const char* ndpi_fpc_confidence_get_name(ndpi_fpc_confidence_t fpc_confidence);

/**
* Set protocol category string
*
Expand Down
30 changes: 28 additions & 2 deletions src/include/ndpi_typedefs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -995,6 +995,23 @@ typedef enum {
NDPI_CONFIDENCE_MAX,
} ndpi_confidence_t;

typedef enum {
NDPI_FPC_CONFIDENCE_UNKNOWN = 0, /* Unknown First Packet Classification */
NDPI_FPC_CONFIDENCE_IP, /* FPC based on IP address */
NDPI_FPC_CONFIDENCE_DNS, /* FPC based on DNS information */

/*
IMPORTANT

Please keep in sync with
ndpi_fpc_confidence_get_name()
in ndpi_main.c
*/

/* Last one */
NDPI_FPC_CONFIDENCE_MAX,
} ndpi_fpc_confidence_t;

typedef enum {
NDPI_PROTOCOL_SAFE = 0, /* Surely doesn't provide risks for the network. (e.g., a news site) */
NDPI_PROTOCOL_ACCEPTABLE, /* Probably doesn't provide risks, but could be malicious (e.g., Dropbox) */
Expand Down Expand Up @@ -1119,6 +1136,12 @@ typedef struct _ndpi_automa {

typedef void ndpi_str_hash;

struct ndpi_fpc_info {
u_int16_t master_protocol;
u_int16_t app_protocol;
ndpi_fpc_confidence_t confidence;
};

typedef struct ndpi_proto {
/*
Note
Expand Down Expand Up @@ -1195,6 +1218,9 @@ struct ndpi_flow_struct {
u_int16_t num_dissector_calls;
ndpi_confidence_t confidence; /* ndpi_confidence_t */

/* First Packet Classification info */
struct ndpi_fpc_info fpc;

/*
if ndpi_struct->direction_detect_disable == 1
tcp sequence number connection tracking
Expand Down Expand Up @@ -1510,8 +1536,8 @@ struct ndpi_flow_struct {
_Static_assert(sizeof(((struct ndpi_flow_struct *)0)->protos) <= 256,
"Size of the struct member protocols increased to more than 256 bytes, "
"please check if this change is necessary.");
_Static_assert(sizeof(struct ndpi_flow_struct) <= 1112,
"Size of the flow struct increased to more than 1112 bytes, "
_Static_assert(sizeof(struct ndpi_flow_struct) <= 1120,
"Size of the flow struct increased to more than 1120 bytes, "
"please check if this change is necessary.");
#endif
#endif
Expand Down
48 changes: 48 additions & 0 deletions src/lib/ndpi_main.c
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Expand Up @@ -8287,6 +8287,33 @@ static int ndpi_do_guess(struct ndpi_detection_module_struct *ndpi_str, struct n

/* ********************************************************************************* */

static void fpc_update(struct ndpi_detection_module_struct *ndpi_str,
struct ndpi_flow_struct *flow,
u_int16_t fpc_master, u_int16_t fpc_app,
ndpi_fpc_confidence_t fpc_confidence)
{
NDPI_LOG_DBG(ndpi_str, "FPC %d.%d/%s -> %d.%d/%s\n",
flow->fpc.master_protocol, flow->fpc.app_protocol,
ndpi_fpc_confidence_get_name(flow->fpc.confidence),
fpc_master, fpc_app,
ndpi_fpc_confidence_get_name(fpc_confidence));
flow->fpc.master_protocol = fpc_master;
flow->fpc.app_protocol = fpc_app;
flow->fpc.confidence = fpc_confidence;
}

/* ********************************************************************************* */

static void fpc_check_ip(struct ndpi_detection_module_struct *ndpi_str,
struct ndpi_flow_struct *flow)
{
if(flow->guessed_protocol_id_by_ip != NDPI_PROTOCOL_UNKNOWN)
fpc_update(ndpi_str, flow, NDPI_PROTOCOL_UNKNOWN,
flow->guessed_protocol_id_by_ip, NDPI_FPC_CONFIDENCE_IP);
}

/* ********************************************************************************* */

static ndpi_protocol ndpi_internal_detection_process_packet(struct ndpi_detection_module_struct *ndpi_str,
struct ndpi_flow_struct *flow,
const unsigned char *packet_data,
Expand Down Expand Up @@ -8421,6 +8448,8 @@ static ndpi_protocol ndpi_internal_detection_process_packet(struct ndpi_detectio

if(ndpi_do_guess(ndpi_str, flow, &ret) == -1)
return(ret);

fpc_check_ip(ndpi_str, flow);
}

num_calls = ndpi_check_flow_func(ndpi_str, flow, &ndpi_selection_packet);
Expand Down Expand Up @@ -9383,6 +9412,25 @@ const char *ndpi_confidence_get_name(ndpi_confidence_t confidence)

/* ****************************************************** */

const char *ndpi_fpc_confidence_get_name(ndpi_fpc_confidence_t fpc_confidence)
{
switch(fpc_confidence) {
case NDPI_FPC_CONFIDENCE_UNKNOWN:
return "Unknown";

case NDPI_FPC_CONFIDENCE_IP:
return "IP address";

case NDPI_FPC_CONFIDENCE_DNS:
return "DNS";

default:
return "Invalid"; /* Out of sync with ndpi_fpc_confidence_t definition */
}
}

/* ****************************************************** */

const char *ndpi_category_get_name(struct ndpi_detection_module_struct *ndpi_str,
ndpi_protocol_category_t category) {
if((!ndpi_str) || (category >= NDPI_PROTOCOL_NUM_CATEGORIES)) {
Expand Down
12 changes: 6 additions & 6 deletions tests/cfgs/caches_cfg/result/ookla.pcap.out
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Original file line number Diff line number Diff line change
Expand Up @@ -34,9 +34,9 @@ JA3 Host Stats:
1 192.168.1.128 2


1 TCP 192.168.1.128:35830 <-> 89.96.108.170:8080 [proto: 91/TLS][IP: 0/Unknown][Encrypted][Confidence: DPI][DPI packets: 6][cat: Web/5][21 pkts/21216 bytes <-> 8 pkts/1950 bytes][Goodput ratio: 93/72][0.32 sec][Hostname/SNI: spd-pub-mi-01-01.fastwebnet.it][(Advertised) ALPNs: h2;http/1.1][TLS Supported Versions: TLSv1.3;TLSv1.2][bytes ratio: 0.832 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/0 17/61 274/280 62/109][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 1010/244 1514/387 612/138][Risk: ** Known Proto on Non Std Port **][Risk Score: 50][Risk Info: Expected on port 443][TLSv1.3][JA3C: c279b0189edb9269da7bc43dea5e0c36][JA4: t13d1714h2_5b57614c22b0_8f66f9ee9c6c][JA3S: fcb2d4d0991292272fcb1e464eedfd43][Firefox][Cipher: TLS_AES_128_GCM_SHA256][Plen Bins: 0,0,4,0,0,0,0,4,9,0,9,0,0,0,0,0,4,0,0,13,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,55,0,0]
2 TCP 192.168.1.128:48854 <-> 104.16.209.12:443 [proto: 91.191/TLS.Ookla][IP: 220/Cloudflare][Encrypted][Confidence: DPI][DPI packets: 6][cat: Network/14][8 pkts/1620 bytes <-> 6 pkts/3818 bytes][Goodput ratio: 67/89][0.06 sec][Hostname/SNI: www.speedtest.net][(Advertised) ALPNs: h2;http/1.1][TLS Supported Versions: TLSv1.3;TLSv1.2][bytes ratio: -0.404 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 7/5 18/15 7/6][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 202/636 583/1514 181/646][TLSv1.3][JA3C: 579ccef312d18482fc42e2b822ca2430][JA4: t13d1715h2_5b57614c22b0_3d5424432f57][JA3S: eb1d94daa7e0344597e756a1fb6e7054][Firefox][Cipher: TLS_AES_128_GCM_SHA256][PLAIN TEXT (@oTAgOeedtest.net)][Plen Bins: 0,0,14,0,0,14,0,0,0,0,14,0,0,0,0,0,28,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,28,0,0]
3 TCP 192.168.1.7:51207 <-> 46.44.253.187:80 [proto: 7.191/HTTP.Ookla][IP: 0/Unknown][ClearText][Confidence: DPI][DPI packets: 6][cat: Network/14][12 pkts/2238 bytes <-> 8 pkts/2082 bytes][Goodput ratio: 64/74][5.33 sec][Hostname/SNI: massarosa-1.speedtest.welcomeitalia.it][bytes ratio: 0.036 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/4 528/47 5005/84 1493/28][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 186/260 430/523 168/194][URL: massarosa-1.speedtest.welcomeitalia.it/crossdomain.xml][StatusCode: 200][Content-Type: application/xml][Server: Apache/2.2.22 (Ubuntu)][User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8][Risk: ** HTTP Obsolete Server **][Risk Score: 50][Risk Info: Obsolete Apache server 2.2.22][PLAIN TEXT (GET /crossdomain.xml HTTP/1.1)][Plen Bins: 0,0,0,0,0,0,0,0,0,0,12,75,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
4 TCP 192.168.1.192:51156 <-> 89.96.108.170:8080 [proto: 131/HTTP_Proxy][IP: 0/Unknown][ClearText][Confidence: Match by port][DPI packets: 10][cat: Web/5][6 pkts/591 bytes <-> 4 pkts/1784 bytes][Goodput ratio: 32/85][0.05 sec][bytes ratio: -0.502 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 9/10 15/20 6/8][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 98/446 143/1514 31/617][Risk: ** Fully encrypted flow **][Risk Score: 50][PLAIN TEXT (gKRZvA)][Plen Bins: 0,40,40,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,20,0,0]
5 TCP 192.168.1.7:51215 <-> 46.44.253.187:8080 [proto: 191/Ookla][IP: 0/Unknown][ClearText][Confidence: DPI][DPI packets: 6][cat: Network/14][19 pkts/1421 bytes <-> 11 pkts/920 bytes][Goodput ratio: 11/20][0.80 sec][bytes ratio: 0.214 (Upload)][IAT c2s/s2c min/avg/max/stddev: 26/0 44/75 103/137 23/41][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 75/84 85/100 9/8][PLAIN TEXT ( 6HELLO 2.4 2016)][Plen Bins: 94,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
6 TCP 192.168.1.192:37790 <-> 185.157.229.246:8080 [proto: 191/Ookla][IP: 0/Unknown][ClearText][Confidence: DPI][DPI packets: 6][cat: Network/14][6 pkts/454 bytes <-> 4 pkts/317 bytes][Goodput ratio: 11/14][0.06 sec][bytes ratio: 0.178 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 12/5 46/9 17/4][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 76/79 106/108 14/17][PLAIN TEXT (HELLO 2.9 )][Plen Bins: 50,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
1 TCP 192.168.1.128:35830 <-> 89.96.108.170:8080 [proto: 91/TLS][IP: 0/Unknown][Encrypted][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 6][cat: Web/5][21 pkts/21216 bytes <-> 8 pkts/1950 bytes][Goodput ratio: 93/72][0.32 sec][Hostname/SNI: spd-pub-mi-01-01.fastwebnet.it][(Advertised) ALPNs: h2;http/1.1][TLS Supported Versions: TLSv1.3;TLSv1.2][bytes ratio: 0.832 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/0 17/61 274/280 62/109][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 1010/244 1514/387 612/138][Risk: ** Known Proto on Non Std Port **][Risk Score: 50][Risk Info: Expected on port 443][TLSv1.3][JA3C: c279b0189edb9269da7bc43dea5e0c36][JA4: t13d1714h2_5b57614c22b0_8f66f9ee9c6c][JA3S: fcb2d4d0991292272fcb1e464eedfd43][Firefox][Cipher: TLS_AES_128_GCM_SHA256][Plen Bins: 0,0,4,0,0,0,0,4,9,0,9,0,0,0,0,0,4,0,0,13,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,55,0,0]
2 TCP 192.168.1.128:48854 <-> 104.16.209.12:443 [proto: 91.191/TLS.Ookla][IP: 220/Cloudflare][Encrypted][Confidence: DPI][FPC: 220/Cloudflare, Confidence: IP address][DPI packets: 6][cat: Network/14][8 pkts/1620 bytes <-> 6 pkts/3818 bytes][Goodput ratio: 67/89][0.06 sec][Hostname/SNI: www.speedtest.net][(Advertised) ALPNs: h2;http/1.1][TLS Supported Versions: TLSv1.3;TLSv1.2][bytes ratio: -0.404 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 7/5 18/15 7/6][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 202/636 583/1514 181/646][TLSv1.3][JA3C: 579ccef312d18482fc42e2b822ca2430][JA4: t13d1715h2_5b57614c22b0_3d5424432f57][JA3S: eb1d94daa7e0344597e756a1fb6e7054][Firefox][Cipher: TLS_AES_128_GCM_SHA256][PLAIN TEXT (@oTAgOeedtest.net)][Plen Bins: 0,0,14,0,0,14,0,0,0,0,14,0,0,0,0,0,28,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,28,0,0]
3 TCP 192.168.1.7:51207 <-> 46.44.253.187:80 [proto: 7.191/HTTP.Ookla][IP: 0/Unknown][ClearText][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 6][cat: Network/14][12 pkts/2238 bytes <-> 8 pkts/2082 bytes][Goodput ratio: 64/74][5.33 sec][Hostname/SNI: massarosa-1.speedtest.welcomeitalia.it][bytes ratio: 0.036 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/4 528/47 5005/84 1493/28][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 186/260 430/523 168/194][URL: massarosa-1.speedtest.welcomeitalia.it/crossdomain.xml][StatusCode: 200][Content-Type: application/xml][Server: Apache/2.2.22 (Ubuntu)][User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/602.4.8 (KHTML, like Gecko) Version/10.0.3 Safari/602.4.8][Risk: ** HTTP Obsolete Server **][Risk Score: 50][Risk Info: Obsolete Apache server 2.2.22][PLAIN TEXT (GET /crossdomain.xml HTTP/1.1)][Plen Bins: 0,0,0,0,0,0,0,0,0,0,12,75,0,0,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
4 TCP 192.168.1.192:51156 <-> 89.96.108.170:8080 [proto: 131/HTTP_Proxy][IP: 0/Unknown][ClearText][Confidence: Match by port][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 10][cat: Web/5][6 pkts/591 bytes <-> 4 pkts/1784 bytes][Goodput ratio: 32/85][0.05 sec][bytes ratio: -0.502 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 9/10 15/20 6/8][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 98/446 143/1514 31/617][Risk: ** Fully encrypted flow **][Risk Score: 50][PLAIN TEXT (gKRZvA)][Plen Bins: 0,40,40,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,20,0,0]
5 TCP 192.168.1.7:51215 <-> 46.44.253.187:8080 [proto: 191/Ookla][IP: 0/Unknown][ClearText][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 6][cat: Network/14][19 pkts/1421 bytes <-> 11 pkts/920 bytes][Goodput ratio: 11/20][0.80 sec][bytes ratio: 0.214 (Upload)][IAT c2s/s2c min/avg/max/stddev: 26/0 44/75 103/137 23/41][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 75/84 85/100 9/8][PLAIN TEXT ( 6HELLO 2.4 2016)][Plen Bins: 94,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
6 TCP 192.168.1.192:37790 <-> 185.157.229.246:8080 [proto: 191/Ookla][IP: 0/Unknown][ClearText][Confidence: DPI][FPC: 0/Unknown, Confidence: Unknown][DPI packets: 6][cat: Network/14][6 pkts/454 bytes <-> 4 pkts/317 bytes][Goodput ratio: 11/14][0.06 sec][bytes ratio: 0.178 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 12/5 46/9 17/4][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 76/79 106/108 14/17][PLAIN TEXT (HELLO 2.9 )][Plen Bins: 50,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
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