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/* Copyright (C) 2007-2010 Open Information Security Foundation
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*
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* You can copy, redistribute or modify this Program under the terms of
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* the GNU General Public License version 2 as published by the Free
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* Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* version 2 along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/**
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* \file
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*
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* \author Victor Julien <victor@inliniac.net>
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*
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* \todo figure out a way to (thread) safely print detection engine info
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* \todo maybe by having a log queue in the packet
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* \todo maybe by accessing it just and hoping threading doesn't hurt
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*/
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#include "suricata-common.h"
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#include "debug.h"
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#include "detect.h"
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#include "flow.h"
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#include "conf.h"
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#include "threads.h"
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#include "threadvars.h"
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#include "tm-modules.h"
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#include "util-print.h"
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#include "pkt-var.h"
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#include "util-unittest.h"
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#include "util-debug.h"
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#include "output.h"
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#include "alert-debuglog.h"
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#include "util-privs.h"
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#define DEFAULT_LOG_FILENAME "alert-debug.log"
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#define MODULE_NAME "AlertDebugLog"
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TmEcode AlertDebugLog (ThreadVars *, Packet *, void *, PacketQueue *);
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TmEcode AlertDebugLogIPv4(ThreadVars *, Packet *, void *, PacketQueue *);
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TmEcode AlertDebugLogIPv6(ThreadVars *, Packet *, void *, PacketQueue *);
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TmEcode AlertDebugLogThreadInit(ThreadVars *, void*, void **);
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TmEcode AlertDebugLogThreadDeinit(ThreadVars *, void *);
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void AlertDebugLogExitPrintStats(ThreadVars *, void *);
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int AlertDebugLogOpenFileCtx(LogFileCtx* , const char *);
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void TmModuleAlertDebugLogRegister (void) {
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tmm_modules[TMM_ALERTDEBUGLOG].name = MODULE_NAME;
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tmm_modules[TMM_ALERTDEBUGLOG].ThreadInit = AlertDebugLogThreadInit;
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tmm_modules[TMM_ALERTDEBUGLOG].Func = AlertDebugLog;
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tmm_modules[TMM_ALERTDEBUGLOG].ThreadExitPrintStats = AlertDebugLogExitPrintStats;
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tmm_modules[TMM_ALERTDEBUGLOG].ThreadDeinit = AlertDebugLogThreadDeinit;
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tmm_modules[TMM_ALERTDEBUGLOG].RegisterTests = NULL;
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tmm_modules[TMM_ALERTDEBUGLOG].cap_flags = 0;
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OutputRegisterModule(MODULE_NAME, "alert-debug", AlertDebugLogInitCtx);
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}
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typedef struct AlertDebugLogThread_ {
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LogFileCtx *file_ctx;
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/** LogFileCtx has the pointer to the file and a mutex to allow multithreading */
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} AlertDebugLogThread;
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static void CreateTimeString (const struct timeval *ts, char *str, size_t size) {
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time_t time = ts->tv_sec;
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struct tm local_tm;
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struct tm *t = gmtime_r(&time, &local_tm);
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uint32_t sec = ts->tv_sec % 86400;
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snprintf(str, size, "%02d/%02d/%02d-%02d:%02d:%02d.%06u",
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t->tm_mon + 1, t->tm_mday, t->tm_year - 100,
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sec / 3600, (sec % 3600) / 60, sec % 60,
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(uint32_t) ts->tv_usec);
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}
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TmEcode AlertDebugLogIPv4(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq)
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{
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AlertDebugLogThread *aft = (AlertDebugLogThread *)data;
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int i;
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char timebuf[64];
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if (p->alerts.cnt == 0)
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return TM_ECODE_OK;
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CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
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SCMutexLock(&aft->file_ctx->fp_mutex);
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fprintf(aft->file_ctx->fp, "+================\n");
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fprintf(aft->file_ctx->fp, "TIME: %s\n", timebuf);
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if (p->pcap_cnt > 0) {
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fprintf(aft->file_ctx->fp, "PCAP PKT NUM: %"PRIu64"\n", p->pcap_cnt);
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}
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fprintf(aft->file_ctx->fp, "ALERT CNT: %" PRIu32 "\n", p->alerts.cnt);
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for (i = 0; i < p->alerts.cnt; i++) {
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PacketAlert *pa = &p->alerts.alerts[i];
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fprintf(aft->file_ctx->fp, "ALERT MSG [%02d]: %s\n", i, pa->msg);
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fprintf(aft->file_ctx->fp, "ALERT GID [%02d]: %" PRIu32 "\n", i, pa->gid);
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fprintf(aft->file_ctx->fp, "ALERT SID [%02d]: %" PRIu32 "\n", i, pa->sid);
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fprintf(aft->file_ctx->fp, "ALERT REV [%02d]: %" PRIu32 "\n", i, pa->rev);
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fprintf(aft->file_ctx->fp, "ALERT CLASS [%02d]: %s\n", i, pa->class_msg);
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fprintf(aft->file_ctx->fp, "ALERT PRIO [%02d]: %" PRIu32 "\n", i, pa->prio);
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}
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char srcip[16], dstip[16];
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inet_ntop(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), srcip, sizeof(srcip));
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inet_ntop(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), dstip, sizeof(dstip));
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fprintf(aft->file_ctx->fp, "SRC IP: %s\n", srcip);
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fprintf(aft->file_ctx->fp, "DST IP: %s\n", dstip);
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fprintf(aft->file_ctx->fp, "PROTO: %" PRIu32 "\n", IPV4_GET_IPPROTO(p));
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if (PKT_IS_TCP(p) || PKT_IS_UDP(p)) {
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fprintf(aft->file_ctx->fp, "SRC PORT: %" PRIu32 "\n", p->sp);
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fprintf(aft->file_ctx->fp, "DST PORT: %" PRIu32 "\n", p->dp);
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if (PKT_IS_TCP(p)) {
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fprintf(aft->file_ctx->fp, "TCP SEQ: %"PRIu32"\n", TCP_GET_SEQ(p));
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fprintf(aft->file_ctx->fp, "TCP ACK: %"PRIu32"\n", TCP_GET_ACK(p));
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}
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}
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/* flow stuff */
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fprintf(aft->file_ctx->fp, "FLOW: to_server: %s, to_client %s\n",
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p->flowflags & FLOW_PKT_TOSERVER ? "TRUE" : "FALSE",
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p->flowflags & FLOW_PKT_TOCLIENT ? "TRUE" : "FALSE");
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PktVar *pv = PktVarGet(p,"http_host");
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if (pv) {
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fprintf(aft->file_ctx->fp, "PKTVAR: %s\n", pv->name);
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PrintRawDataFp(aft->file_ctx->fp, pv->value, pv->value_len);
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}
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pv = PktVarGet(p,"http_ua");
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if (pv) {
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fprintf(aft->file_ctx->fp, "PKTVAR: %s\n", pv->name);
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PrintRawDataFp(aft->file_ctx->fp, pv->value, pv->value_len);
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}
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/* any stuff */
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/* Sig details? */
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/* pkt vars */
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/* flowvars */
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aft->file_ctx->alerts += p->alerts.cnt;
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fprintf(aft->file_ctx->fp, "PACKET LEN: %" PRIu32 "\n", p->pktlen);
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fprintf(aft->file_ctx->fp, "PACKET:\n");
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PrintRawDataFp(aft->file_ctx->fp, p->pkt, p->pktlen);
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fflush(aft->file_ctx->fp);
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SCMutexUnlock(&aft->file_ctx->fp_mutex);
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return TM_ECODE_OK;
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}
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TmEcode AlertDebugLogIPv6(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq)
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{
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AlertDebugLogThread *aft = (AlertDebugLogThread *)data;
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int i;
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char timebuf[64];
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if (p->alerts.cnt == 0)
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return TM_ECODE_OK;
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aft->file_ctx->alerts += p->alerts.cnt;
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CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
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SCMutexLock(&aft->file_ctx->fp_mutex);
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for (i = 0; i < p->alerts.cnt; i++) {
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PacketAlert *pa = &p->alerts.alerts[i];
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char srcip[46], dstip[46];
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inet_ntop(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p), srcip, sizeof(srcip));
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inet_ntop(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p), dstip, sizeof(dstip));
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fprintf(aft->file_ctx->fp, "%s [**] [%" PRIu32 ":%" PRIu32 ":%" PRIu32 "] %s [**] [Classification: fixme] [Priority: %" PRIu32 "] {%" PRIu32 "} %s:%" PRIu32 " -> %s:%" PRIu32 "\n",
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timebuf, pa->gid, pa->sid, pa->rev, pa->msg, pa->prio, IPV6_GET_L4PROTO(p), srcip, p->sp, dstip, p->dp);
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}
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fflush(aft->file_ctx->fp);
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SCMutexUnlock(&aft->file_ctx->fp_mutex);
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return TM_ECODE_OK;
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}
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TmEcode AlertDebugLog (ThreadVars *tv, Packet *p, void *data, PacketQueue *pq)
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{
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if (PKT_IS_IPV4(p)) {
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return AlertDebugLogIPv4(tv, p, data, pq);
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} else if (PKT_IS_IPV6(p)) {
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return AlertDebugLogIPv6(tv, p, data, pq);
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}
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return TM_ECODE_OK;
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}
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TmEcode AlertDebugLogThreadInit(ThreadVars *t, void *initdata, void **data)
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{
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AlertDebugLogThread *aft = SCMalloc(sizeof(AlertDebugLogThread));
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if (aft == NULL)
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return TM_ECODE_FAILED;
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memset(aft, 0, sizeof(AlertDebugLogThread));
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if(initdata == NULL)
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{
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SCLogDebug("Error getting context for DebugLog. \"initdata\" argument NULL");
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SCFree(aft);
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return TM_ECODE_FAILED;
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}
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/** Use the Ouptut Context (file pointer and mutex) */
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aft->file_ctx = ((OutputCtx *)initdata)->data;
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*data = (void *)aft;
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return TM_ECODE_OK;
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}
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TmEcode AlertDebugLogThreadDeinit(ThreadVars *t, void *data)
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{
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AlertDebugLogThread *aft = (AlertDebugLogThread *)data;
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if (aft == NULL) {
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return TM_ECODE_OK;
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}
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/* clear memory */
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memset(aft, 0, sizeof(AlertDebugLogThread));
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SCFree(aft);
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return TM_ECODE_OK;
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}
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void AlertDebugLogExitPrintStats(ThreadVars *tv, void *data) {
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AlertDebugLogThread *aft = (AlertDebugLogThread *)data;
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if (aft == NULL) {
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return;
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}
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SCLogInfo("(%s) Alerts %" PRIu64 "", tv->name, aft->file_ctx->alerts);
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}
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/** \brief Create a new LogFileCtx for alert debug logging.
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* \param ConfNode containing configuration for this logger.
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* \return NULL if failure, LogFileCtx* to the file_ctx if succesful
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* */
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OutputCtx *AlertDebugLogInitCtx(ConfNode *conf)
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{
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int ret=0;
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LogFileCtx* file_ctx=LogFileNewCtx();
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if(file_ctx == NULL)
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{
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SCLogDebug("AlertDebugLogInitCtx: Couldn't create new file_ctx");
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return NULL;
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}
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const char *filename = ConfNodeLookupChildValue(conf, "filename");
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if (filename == NULL)
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filename = DEFAULT_LOG_FILENAME;
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/** fill the new LogFileCtx with the specific AlertDebugLog configuration */
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ret=AlertDebugLogOpenFileCtx(file_ctx, filename);
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if(ret < 0)
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return NULL;
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OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx));
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if (output_ctx == NULL)
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return NULL;
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output_ctx->data = file_ctx;
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return output_ctx;
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}
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/** \brief Read the config set the file pointer, open the file
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* \param file_ctx pointer to a created LogFileCtx using LogFileNewCtx()
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* \param filename name of log file
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* \return -1 if failure, 0 if succesful
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* */
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int AlertDebugLogOpenFileCtx(LogFileCtx *file_ctx, const char *filename)
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{
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int ret=0;
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char log_path[PATH_MAX], *log_dir;
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if (ConfGet("default-log-dir", &log_dir) != 1)
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log_dir = DEFAULT_LOG_DIR;
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snprintf(log_path, PATH_MAX, "%s/%s", log_dir, DEFAULT_LOG_FILENAME);
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file_ctx->fp = fopen(log_path, "w");
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if (file_ctx->fp == NULL) {
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SCLogError(SC_ERR_FOPEN, "ERROR: failed to open %s: %s", log_path,
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strerror(errno));
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return -1;
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}
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return ret;
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}
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