void SCProfilingDumpPacketStats(void) {
int i;
FILE *fp;
char totalstr[256];
uint64_t total;
if (profiling_packets_enabled == 0)
return;
if (profiling_packets_output_to_file == 1) {
fp = fopen(profiling_packets_file_name, profiling_packets_file_mode);
if (fp == NULL) {
SCLogError(SC_ERR_FOPEN, "failed to open %s: %s",
profiling_packets_file_name, strerror(errno));
return;
}
} else {
fp = stdout;
}
fprintf(fp, "\n\nPacket profile dump:\n");
fprintf(fp, "\n%-6s %-5s %-12s %-12s %-12s %-12s %-12s %-3s\n",
"IP ver", "Proto", "cnt", "min", "max", "avg", "tot", "%%");
fprintf(fp, "%-6s %-5s %-12s %-12s %-12s %-12s %-12s %-3s\n",
"------", "-----", "----------", "------------", "------------", "-----------", "-----------", "---");
total = 0;
for (i = 0; i < 257; i++) {
SCProfilePacketData *pd = &packet_profile_data4[i];
total += pd->tot;
pd = &packet_profile_data6[i];
total += pd->tot;
}
for (i = 0; i < 257; i++) {
SCProfilePacketData *pd = &packet_profile_data4[i];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, " IPv4 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %6.2f\n", i, pd->cnt,
pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
for (i = 0; i < 257; i++) {
SCProfilePacketData *pd = &packet_profile_data6[i];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, " IPv6 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %6.2f\n", i, pd->cnt,
pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
fprintf(fp, "Note: Protocol 256 tracks pseudo/tunnel packets.\n");
fprintf(fp, "\nPer Thread module stats:\n");
fprintf(fp, "\n%-24s %-6s %-5s %-12s %-12s %-12s %-12s %-12s %-3s",
"Thread Module", "IP ver", "Proto", "cnt", "min", "max", "avg", "tot", "%%");
#ifdef PROFILE_LOCKING
fprintf(fp, " %-10s %-10s %-12s %-12s %-10s %-10s %-12s %-12s\n",
"locks", "ticks", "cont.", "cont.avg", "slocks", "sticks", "scont.", "scont.avg");
#else
fprintf(fp, "\n");
#endif
fprintf(fp, "%-24s %-6s %-5s %-12s %-12s %-12s %-12s %-12s %-3s",
"------------------------", "------", "-----", "----------", "------------", "------------", "-----------", "-----------", "---");
#ifdef PROFILE_LOCKING
fprintf(fp, " %-10s %-10s %-12s %-12s %-10s %-10s %-12s %-12s\n",
"--------", "--------", "----------", "-----------", "--------", "--------", "------------", "-----------");
#else
fprintf(fp, "\n");
#endif
int m;
total = 0;
for (m = 0; m < TMM_SIZE; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_tmm_data4[m][p];
total += pd->tot;
pd = &packet_profile_tmm_data6[m][p];
total += pd->tot;
}
}
for (m = 0; m < TMM_SIZE; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_tmm_data4[m][p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, "%-24s IPv4 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %6.2f",
TmModuleTmmIdToString(m), p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
#ifdef PROFILE_LOCKING
fprintf(fp, " %10.2f %12"PRIu64" %12"PRIu64" %10.2f %10.2f %12"PRIu64" %12"PRIu64" %10.2f\n",
(float)pd->lock/pd->cnt, (uint64_t)pd->ticks/pd->cnt, pd->contention, (float)pd->contention/pd->cnt, (float)pd->slock/pd->cnt, (uint64_t)pd->sticks/pd->cnt, pd->scontention, (float)pd->scontention/pd->cnt);
#else
fprintf(fp, "\n");
#endif
}
}
for (m = 0; m < TMM_SIZE; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_tmm_data6[m][p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, "%-24s IPv6 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %6.2f\n",
TmModuleTmmIdToString(m), p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
}
fprintf(fp, "Note: TMM_STREAMTCP includes TCP app layer parsers, see below.\n");
fprintf(fp, "\nPer App layer parser stats:\n");
fprintf(fp, "\n%-20s %-6s %-5s %-12s %-12s %-12s %-12s\n",
"App Layer", "IP ver", "Proto", "cnt", "min", "max", "avg");
fprintf(fp, "%-20s %-6s %-5s %-12s %-12s %-12s %-12s\n",
"--------------------", "------", "-----", "----------", "------------", "------------", "-----------");
total = 0;
for (m = 0; m < ALPROTO_MAX; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_app_data4[m][p];
total += pd->tot;
pd = &packet_profile_app_data6[m][p];
total += pd->tot;
}
}
for (m = 0; m < ALPROTO_MAX; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_app_data4[m][p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, "%-20s IPv4 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %-6.2f\n",
TmModuleAlprotoToString(m), p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
}
for (m = 0; m < ALPROTO_MAX; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_app_data6[m][p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, "%-20s IPv6 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %-6.2f\n",
TmModuleAlprotoToString(m), p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
}
/* proto detect output */
{
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_app_pd_data4[p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
fprintf(fp, "%-20s IPv4 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s\n",
"Proto detect", p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr);
}
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_app_pd_data6[p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
fprintf(fp, "%-20s IPv6 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s\n",
"Proto detect", p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr);
}
}
total = 0;
for (m = 0; m < PROF_DETECT_SIZE; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_detect_data4[m][p];
total += pd->tot;
pd = &packet_profile_detect_data6[m][p];
total += pd->tot;
}
}
fprintf(fp, "\nGeneral detection engine stats:\n");
fprintf(fp, "\n%-24s %-6s %-5s %-12s %-12s %-12s %-12s %-12s\n",
"Detection phase", "IP ver", "Proto", "cnt", "min", "max", "avg", "tot");
fprintf(fp, "%-24s %-6s %-5s %-12s %-12s %-12s %-12s %-12s\n",
"------------------------", "------", "-----", "----------", "------------", "------------", "-----------", "-----------");
for (m = 0; m < PROF_DETECT_SIZE; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_detect_data4[m][p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, "%-24s IPv4 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %-6.2f\n",
PacketProfileDetectIdToString(m), p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
}
for (m = 0; m < PROF_DETECT_SIZE; m++) {
int p;
for (p = 0; p < 257; p++) {
SCProfilePacketData *pd = &packet_profile_detect_data6[m][p];
if (pd->cnt == 0) {
continue;
}
FormatNumber(pd->tot, totalstr, sizeof(totalstr));
double percent = (long double)pd->tot /
(long double)total * 100;
fprintf(fp, "%-24s IPv6 %3d %12"PRIu64" %12"PRIu64" %12"PRIu64" %12"PRIu64" %12s %-6.2f\n",
PacketProfileDetectIdToString(m), p, pd->cnt, pd->min, pd->max, (uint64_t)(pd->tot / pd->cnt), totalstr, percent);
}
}
fclose(fp);
}
/**
* \brief Prints analysis of loaded rules.
*
* Warns if potential rule issues are detected. For example,
* warns if a rule uses a construct that may perform poorly,
* e.g. pcre without content or with http_method content only;
* warns if a rule uses a construct that may not be consistent with intent,
* e.g. client side ports only, http and content without any http_* modifiers, etc.
*
* \param s Pointer to the signature.
*/
void EngineAnalysisRules(Signature *s, char *line)
{
uint32_t rule_bidirectional = 0;
uint32_t rule_pcre = 0;
uint32_t rule_pcre_http = 0;
uint32_t rule_content = 0;
uint32_t rule_flow = 0;
uint32_t rule_flags = 0;
uint32_t rule_flow_toserver = 0;
uint32_t rule_flow_toclient = 0;
uint32_t rule_flow_nostream = 0;
uint32_t rule_ipv4_only = 0;
uint32_t rule_ipv6_only = 0;
uint32_t rule_flowbits = 0;
uint32_t rule_flowint = 0;
//uint32_t rule_flowvar = 0;
uint32_t rule_content_http = 0;
uint32_t rule_content_offset_depth = 0;
uint32_t list_id = 0;
uint32_t rule_warning = 0;
uint32_t raw_http_buf = 0;
uint32_t norm_http_buf = 0;
uint32_t stream_buf = 0;
uint32_t packet_buf = 0;
uint32_t http_header_buf = 0;
uint32_t http_uri_buf = 0;
uint32_t http_method_buf = 0;
uint32_t http_cookie_buf = 0;
uint32_t http_client_body_buf = 0;
uint32_t http_server_body_buf = 0;
uint32_t http_stat_code_buf = 0;
uint32_t http_stat_msg_buf = 0;
uint32_t http_raw_header_buf = 0;
uint32_t http_raw_uri_buf = 0;
uint32_t http_ua_buf = 0;
uint32_t warn_pcre_no_content = 0;
uint32_t warn_pcre_http_content = 0;
uint32_t warn_pcre_http = 0;
uint32_t warn_content_http_content = 0;
uint32_t warn_content_http = 0;
uint32_t warn_tcp_no_flow = 0;
uint32_t warn_client_ports = 0;
uint32_t warn_direction = 0;
uint32_t warn_method_toclient = 0;
uint32_t warn_method_serverbody = 0;
uint32_t warn_pcre_method = 0;
uint32_t warn_encoding_norm_http_buf = 0;
uint32_t warn_offset_depth_pkt_stream = 0;
uint32_t warn_offset_depth_alproto = 0;
uint32_t warn_non_alproto_fp_for_alproto_sig = 0;
if (s->init_flags & SIG_FLAG_INIT_BIDIREC) {
rule_bidirectional = 1;
}
if (s->flags & SIG_FLAG_REQUIRE_PACKET) {
packet_buf += 1;
}
if (s->flags & SIG_FLAG_REQUIRE_STREAM) {
stream_buf += 1;
}
if (s->proto.flags & DETECT_PROTO_IPV4) {
rule_ipv4_only += 1;
}
if (s->proto.flags & DETECT_PROTO_IPV6) {
rule_ipv6_only += 1;
}
for (list_id = 0; list_id < DETECT_SM_LIST_MAX; list_id++) {
SigMatch *sm = NULL;
for (sm = s->sm_lists[list_id]; sm != NULL; sm = sm->next) {
if (sm->type == DETECT_PCRE) {
if (list_id == DETECT_SM_LIST_HCBDMATCH) {
rule_pcre_http += 1;
http_client_body_buf += 1;
raw_http_buf += 1;
}
else if (list_id == DETECT_SM_LIST_UMATCH) {
rule_pcre_http += 1;
norm_http_buf += 1;
http_uri_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HHDMATCH) {
rule_pcre_http += 1;
norm_http_buf += 1;
http_header_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HCDMATCH) {
rule_pcre_http += 1;
norm_http_buf += 1;
http_cookie_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HSBDMATCH) {
rule_pcre_http += 1;
http_server_body_buf += 1;
raw_http_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HRHDMATCH) {
rule_pcre_http += 1;
raw_http_buf += 1;
http_raw_header_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HMDMATCH) {
rule_pcre_http += 1;
raw_http_buf += 1;
http_method_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HRUDMATCH) {
rule_pcre_http += 1;
raw_http_buf += 1;
http_raw_uri_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HSMDMATCH) {
rule_pcre_http += 1;
raw_http_buf += 1;
http_stat_msg_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HSCDMATCH) {
rule_pcre_http += 1;
raw_http_buf += 1;
http_stat_code_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HUADMATCH) {
rule_pcre_http += 1;
norm_http_buf += 1;
http_ua_buf += 1;
}
else {
rule_pcre += 1;
}
}
else if (sm->type == DETECT_CONTENT) {
if (list_id == DETECT_SM_LIST_UMATCH
|| list_id == DETECT_SM_LIST_HHDMATCH
|| list_id == DETECT_SM_LIST_HCDMATCH) {
rule_content_http += 1;
norm_http_buf += 1;
DetectContentData *cd = (DetectContentData *)sm->ctx;
if (cd != NULL && PerCentEncodingMatch(cd->content, cd->content_len) > 0) {
warn_encoding_norm_http_buf += 1;
rule_warning += 1;
}
if (list_id == DETECT_SM_LIST_UMATCH) {
http_uri_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HHDMATCH) {
http_header_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HCDMATCH) {
http_cookie_buf += 1;
}
}
else if (list_id == DETECT_SM_LIST_HCBDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_client_body_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HSBDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_server_body_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HRHDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_raw_header_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HRUDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_raw_uri_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HSMDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_stat_msg_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HSCDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_stat_code_buf += 1;
}
else if (list_id == DETECT_SM_LIST_HMDMATCH) {
rule_content_http += 1;
raw_http_buf += 1;
http_method_buf += 1;
}
else if (list_id == DETECT_SM_LIST_PMATCH) {
rule_content += 1;
DetectContentData *cd = (DetectContentData *)sm->ctx;
if (cd->flags &
(DETECT_CONTENT_OFFSET | DETECT_CONTENT_DEPTH)) {
rule_content_offset_depth++;
}
}
}
else if (sm->type == DETECT_FLOW) {
rule_flow += 1;
if ((s->flags & SIG_FLAG_TOSERVER) && !(s->flags & SIG_FLAG_TOCLIENT)) {
rule_flow_toserver = 1;
}
else if ((s->flags & SIG_FLAG_TOCLIENT) && !(s->flags & SIG_FLAG_TOSERVER)) {
rule_flow_toclient = 1;
}
DetectFlowData *fd = (DetectFlowData *)sm->ctx;
if (fd != NULL) {
if (fd->flags & FLOW_PKT_NOSTREAM) rule_flow_nostream = 1;
}
}
else if (sm->type == DETECT_FLOWBITS) {
if (list_id == DETECT_SM_LIST_MATCH) {
rule_flowbits += 1;
}
}
else if (sm->type == DETECT_FLOWINT) {
if (list_id == DETECT_SM_LIST_MATCH) {
rule_flowint += 1;
}
}
else if (sm->type == DETECT_FLAGS) {
DetectFlagsData *fd = (DetectFlagsData *)sm->ctx;
if (fd != NULL) {
rule_flags = 1;
}
}
} /* for (sm = s->sm_lists[list_id]; sm != NULL; sm = sm->next) */
} /* for ( ; list_id < DETECT_SM_LIST_MAX; list_id++) */
if (rule_pcre > 0 && rule_content == 0 && rule_content_http == 0) {
rule_warning += 1;
warn_pcre_no_content = 1;
}
if (rule_content_http > 0 && rule_pcre > 0 && rule_pcre_http == 0) {
rule_warning += 1;
warn_pcre_http_content = 1;
}
else if (s->alproto == ALPROTO_HTTP && rule_pcre > 0 && rule_pcre_http == 0) {
rule_warning += 1;
warn_pcre_http = 1;
}
if (rule_content > 0 && rule_content_http > 0) {
rule_warning += 1;
warn_content_http_content = 1;
}
if (s->alproto == ALPROTO_HTTP && rule_content > 0 && rule_content_http == 0) {
rule_warning += 1;
warn_content_http = 1;
}
if (rule_content == 1) {
//todo: warning if content is weak, separate warning for pcre + weak content
}
if (rule_flow == 0 && rule_flags == 0
&& !(s->proto.flags & DETECT_PROTO_ANY) && DetectProtoContainsProto(&s->proto, IPPROTO_TCP)
&& (rule_content || rule_content_http || rule_pcre || rule_pcre_http || rule_flowbits)) {
rule_warning += 1;
warn_tcp_no_flow = 1;
}
if (rule_flow && !rule_bidirectional && (rule_flow_toserver || rule_flow_toclient)
&& !((s->flags & SIG_FLAG_SP_ANY) && (s->flags & SIG_FLAG_DP_ANY))) {
if (((s->flags & SIG_FLAG_TOSERVER) && !(s->flags & SIG_FLAG_SP_ANY) && (s->flags & SIG_FLAG_DP_ANY))
|| ((s->flags & SIG_FLAG_TOCLIENT) && !(s->flags & SIG_FLAG_DP_ANY) && (s->flags & SIG_FLAG_SP_ANY))) {
rule_warning += 1;
warn_client_ports = 1;
}
}
if (rule_flow && rule_bidirectional && (rule_flow_toserver || rule_flow_toclient)) {
rule_warning += 1;
warn_direction = 1;
}
if (http_method_buf) {
if (rule_flow && rule_flow_toclient) {
rule_warning += 1;
warn_method_toclient = 1;
}
if (http_server_body_buf) {
rule_warning += 1;
warn_method_serverbody = 1;
}
if (rule_content == 0 && rule_content_http == 0 && (rule_pcre > 0 || rule_pcre_http > 0)) {
rule_warning += 1;
warn_pcre_method = 1;
}
}
if (rule_content_offset_depth > 0 && stream_buf && packet_buf) {
rule_warning += 1;
warn_offset_depth_pkt_stream = 1;
}
if (rule_content_offset_depth > 0 && !stream_buf && packet_buf && s->alproto != ALPROTO_UNKNOWN) {
rule_warning += 1;
warn_offset_depth_alproto = 1;
}
if (s->mpm_sm != NULL && s->alproto == ALPROTO_HTTP &&
SigMatchListSMBelongsTo(s, s->mpm_sm) == DETECT_SM_LIST_PMATCH) {
rule_warning += 1;
warn_non_alproto_fp_for_alproto_sig = 1;
}
if (!rule_warnings_only || (rule_warnings_only && rule_warning > 0)) {
fprintf(rule_engine_analysis_FD, "== Sid: %u ==\n", s->id);
fprintf(rule_engine_analysis_FD, "%s\n", line);
if (s->flags & SIG_FLAG_IPONLY) fprintf(rule_engine_analysis_FD, " Rule is ip only.\n");
if (rule_ipv6_only) fprintf(rule_engine_analysis_FD, " Rule is IPv6 only.\n");
if (rule_ipv4_only) fprintf(rule_engine_analysis_FD, " Rule is IPv4 only.\n");
if (packet_buf) fprintf(rule_engine_analysis_FD, " Rule matches on packets.\n");
if (!rule_flow_nostream && stream_buf && (rule_flow || rule_flowbits || rule_content || rule_pcre)) {
fprintf(rule_engine_analysis_FD, " Rule matches on reassembled stream.\n");
}
if (http_uri_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http uri buffer.\n");
if (http_header_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http header buffer.\n");
if (http_cookie_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http cookie buffer.\n");
if (http_raw_uri_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http raw uri buffer.\n");
if (http_raw_header_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http raw header buffer.\n");
if (http_method_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http method buffer.\n");
if (http_server_body_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http server body buffer.\n");
if (http_client_body_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http client body buffer.\n");
if (http_stat_msg_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http stat msg buffer.\n");
if (http_stat_code_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http stat code buffer.\n");
if (http_ua_buf) fprintf(rule_engine_analysis_FD, " Rule matches on http user agent buffer.\n");
if (s->alproto != ALPROTO_UNKNOWN) {
fprintf(rule_engine_analysis_FD, " App layer protocol is %s.\n", TmModuleAlprotoToString(s->alproto));
}
if (rule_content || rule_content_http || rule_pcre || rule_pcre_http) {
fprintf(rule_engine_analysis_FD, " Rule contains %d content options, %d http content options, %d pcre options, and %d pcre options with http modifiers.\n", rule_content, rule_content_http, rule_pcre, rule_pcre_http);
}
/* print fast pattern info */
EngineAnalysisRulesPrintFP(s);
/* this is where the warnings start */
if (warn_pcre_no_content /*rule_pcre > 0 && rule_content == 0 && rule_content_http == 0*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule uses pcre without a content option present.\n"
" -Consider adding a content to improve performance of this rule.\n");
}
if (warn_pcre_http_content /*rule_content_http > 0 && rule_pcre > 0 && rule_pcre_http == 0*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule uses content options with http_* and pcre options without http modifiers.\n"
" -Consider adding http pcre modifier.\n");
}
else if (warn_pcre_http /*s->alproto == ALPROTO_HTTP && rule_pcre > 0 && rule_pcre_http == 0*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule app layer protocol is http, but pcre options do not have http modifiers.\n"
" -Consider adding http pcre modifiers.\n");
}
if (warn_content_http_content /*rule_content > 0 && rule_content_http > 0*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule contains content with http_* and content without http_*.\n"
" -Consider adding http content modifiers.\n");
}
if (warn_content_http /*s->alproto == ALPROTO_HTTP && rule_content > 0 && rule_content_http == 0*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule app layer protocol is http, but content options do not have http_* modifiers.\n"
" -Consider adding http content modifiers.\n");
}
if (rule_content == 1) {
//todo: warning if content is weak, separate warning for pcre + weak content
}
if (warn_encoding_norm_http_buf) {
fprintf(rule_engine_analysis_FD, " Warning: Rule may contain percent encoded content for a normalized http buffer match.\n");
}
if (warn_tcp_no_flow /*rule_flow == 0 && rule_flow == 0
&& !(s->proto.flags & DETECT_PROTO_ANY) && DetectProtoContainsProto(&s->proto, IPPROTO_TCP)*/) {
fprintf(rule_engine_analysis_FD, " Warning: TCP rule without a flow or flags option.\n"
" -Consider adding flow or flags to improve performance of this rule.\n");
}
if (warn_client_ports /*rule_flow && !rule_bidirectional && (rule_flow_toserver || rule_flow_toclient)
&& !((s->flags & SIG_FLAG_SP_ANY) && (s->flags & SIG_FLAG_DP_ANY)))
if (((s->flags & SIG_FLAG_TOSERVER) && !(s->flags & SIG_FLAG_SP_ANY) && (s->flags & SIG_FLAG_DP_ANY))
|| ((s->flags & SIG_FLAG_TOCLIENT) && !(s->flags & SIG_FLAG_DP_ANY) && (s->flags & SIG_FLAG_SP_ANY))*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule contains ports or port variables only on the client side.\n"
" -Flow direction possibly inconsistent with rule.\n");
}
if (warn_direction /*rule_flow && rule_bidirectional && (rule_flow_toserver || rule_flow_toclient)*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule is bidirectional and has a flow option with a specific direction.\n");
}
if (warn_method_toclient /*http_method_buf && rule_flow && rule_flow_toclient*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule uses content or pcre for http_method with flow:to_client or from_server\n");
}
if (warn_method_serverbody /*http_method_buf && http_server_body_buf*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule uses content or pcre for http_method with content or pcre for http_server_body.\n");
}
if (warn_pcre_method /*http_method_buf && rule_content == 0 && rule_content_http == 0
&& (rule_pcre > 0 || rule_pcre_http > 0)*/) {
fprintf(rule_engine_analysis_FD, " Warning: Rule uses pcre with only a http_method content; possible performance issue.\n");
}
if (warn_offset_depth_pkt_stream) {
fprintf(rule_engine_analysis_FD, " Warning: Rule has depth"
"/offset with raw content keywords. Please note the "
"offset/depth will be checked against both packet "
"payloads and stream. If you meant to have the offset/"
"depth checked against just the payload, you can update "
"the signature as \"alert tcp-pkt...\"\n");
}
if (warn_offset_depth_alproto) {
fprintf(rule_engine_analysis_FD, " Warning: Rule has "
"offset/depth set along with a match on a specific "
"app layer protocol - %d. This can lead to FNs if we "
"have a offset/depth content match on a packet payload "
"before we can detect the app layer protocol for the "
"flow.\n", s->alproto);
}
if (warn_non_alproto_fp_for_alproto_sig) {
fprintf(rule_engine_analysis_FD, " Warning: Rule app layer "
"protocol is http, but the fast_pattern is set on the raw "
"stream. Consider adding fast_pattern over a http "
"buffer for increased performance.");
}
if (rule_warning == 0) {
fprintf(rule_engine_analysis_FD, " No warnings for this rule.\n");
}
fprintf(rule_engine_analysis_FD, "\n");
}
return;
}
/**
* \brief Initialize profiling.
*/
void
SCProfilingInit(void)
{
ConfNode *conf;
conf = ConfGetNode("profiling.packets");
if (conf != NULL) {
if (ConfNodeChildValueIsTrue(conf, "enabled")) {
profiling_packets_enabled = 1;
if (pthread_mutex_init(&packet_profile_lock, NULL) != 0) {
SCLogError(SC_ERR_MUTEX,
"Failed to initialize packet profiling mutex.");
exit(EXIT_FAILURE);
}
memset(&packet_profile_data4, 0, sizeof(packet_profile_data4));
memset(&packet_profile_data6, 0, sizeof(packet_profile_data6));
memset(&packet_profile_tmm_data4, 0, sizeof(packet_profile_tmm_data4));
memset(&packet_profile_tmm_data6, 0, sizeof(packet_profile_tmm_data6));
memset(&packet_profile_app_data4, 0, sizeof(packet_profile_app_data4));
memset(&packet_profile_app_data6, 0, sizeof(packet_profile_app_data6));
memset(&packet_profile_app_pd_data4, 0, sizeof(packet_profile_app_pd_data4));
memset(&packet_profile_app_pd_data6, 0, sizeof(packet_profile_app_pd_data6));
memset(&packet_profile_detect_data4, 0, sizeof(packet_profile_detect_data4));
memset(&packet_profile_detect_data6, 0, sizeof(packet_profile_detect_data6));
const char *filename = ConfNodeLookupChildValue(conf, "filename");
if (filename != NULL) {
char *log_dir;
if (ConfGet("default-log-dir", &log_dir) != 1)
log_dir = DEFAULT_LOG_DIR;
profiling_packets_file_name = SCMalloc(PATH_MAX);
if (unlikely(profiling_packets_file_name == NULL)) {
SCLogError(SC_ERR_MEM_ALLOC, "can't duplicate file name");
exit(EXIT_FAILURE);
}
snprintf(profiling_packets_file_name, PATH_MAX, "%s/%s", log_dir, filename);
const char *v = ConfNodeLookupChildValue(conf, "append");
if (v == NULL || ConfValIsTrue(v)) {
profiling_packets_file_mode = "a";
} else {
profiling_packets_file_mode = "w";
}
profiling_packets_output_to_file = 1;
}
}
conf = ConfGetNode("profiling.packets.csv");
if (conf != NULL) {
if (ConfNodeChildValueIsTrue(conf, "enabled")) {
const char *filename = ConfNodeLookupChildValue(conf, "filename");
if (filename == NULL) {
filename = "packet_profile.csv";
}
char *log_dir;
if (ConfGet("default-log-dir", &log_dir) != 1)
log_dir = DEFAULT_LOG_DIR;
profiling_csv_file_name = SCMalloc(PATH_MAX);
if (unlikely(profiling_csv_file_name == NULL)) {
SCLogError(SC_ERR_MEM_ALLOC, "out of memory");
exit(EXIT_FAILURE);
}
snprintf(profiling_csv_file_name, PATH_MAX, "%s/%s", log_dir, filename);
packet_profile_csv_fp = fopen(profiling_csv_file_name, "w");
if (packet_profile_csv_fp == NULL) {
return;
}
fprintf(packet_profile_csv_fp, "pcap_cnt,ipver,ipproto,total,");
int i;
for (i = 0; i < TMM_SIZE; i++) {
fprintf(packet_profile_csv_fp, "%s,", TmModuleTmmIdToString(i));
}
fprintf(packet_profile_csv_fp, "threading,");
for (i = 0; i < ALPROTO_MAX; i++) {
fprintf(packet_profile_csv_fp, "%s,", TmModuleAlprotoToString(i));
}
fprintf(packet_profile_csv_fp, "STREAM (no app),proto detect,");
for (i = 0; i < PROF_DETECT_SIZE; i++) {
fprintf(packet_profile_csv_fp, "%s,", PacketProfileDetectIdToString(i));
}
fprintf(packet_profile_csv_fp, "\n");
profiling_packets_csv_enabled = 1;
}
}
}
conf = ConfGetNode("profiling.locks");
if (conf != NULL) {
if (ConfNodeChildValueIsTrue(conf, "enabled")) {
#ifndef PROFILE_LOCKING
SCLogWarning(SC_WARN_PROFILE, "lock profiling not compiled in. Add --enable-profiling-locks to configure.");
#else
profiling_locks_enabled = 1;
LockRecordInitHash();
const char *filename = ConfNodeLookupChildValue(conf, "filename");
if (filename != NULL) {
char *log_dir;
if (ConfGet("default-log-dir", &log_dir) != 1)
log_dir = DEFAULT_LOG_DIR;
profiling_locks_file_name = SCMalloc(PATH_MAX);
if (unlikely(profiling_locks_file_name == NULL)) {
SCLogError(SC_ERR_MEM_ALLOC, "can't duplicate file name");
exit(EXIT_FAILURE);
}
snprintf(profiling_locks_file_name, PATH_MAX, "%s/%s", log_dir, filename);
const char *v = ConfNodeLookupChildValue(conf, "append");
if (v == NULL || ConfValIsTrue(v)) {
profiling_locks_file_mode = "a";
} else {
profiling_locks_file_mode = "w";
}
profiling_locks_output_to_file = 1;
}
#endif
}
}
}
