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473 lines
14 KiB
C
473 lines
14 KiB
C
/* 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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* Implements http logging portion of the engine.
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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 "pkt-var.h"
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#include "conf.h"
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#include "threadvars.h"
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#include "tm-modules.h"
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#include "threads.h"
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#include "util-print.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 "log-httplog.h"
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#include "app-layer-htp.h"
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#include <htp/dslib.h>
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#include "app-layer.h"
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#include "util-privs.h"
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#define DEFAULT_LOG_FILENAME "http.log"
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#define MODULE_NAME "LogHttpLog"
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TmEcode LogHttpLog (ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *);
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TmEcode LogHttpLogIPv4(ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *);
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TmEcode LogHttpLogIPv6(ThreadVars *, Packet *, void *, PacketQueue *, PacketQueue *);
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TmEcode LogHttpLogThreadInit(ThreadVars *, void *, void **);
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TmEcode LogHttpLogThreadDeinit(ThreadVars *, void *);
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void LogHttpLogExitPrintStats(ThreadVars *, void *);
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int LogHttpLogOpenFileCtx(LogFileCtx* , const char *);
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static void LogHttpLogDeInitCtx(OutputCtx *);
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void TmModuleLogHttpLogRegister (void) {
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tmm_modules[TMM_LOGHTTPLOG].name = MODULE_NAME;
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tmm_modules[TMM_LOGHTTPLOG].ThreadInit = LogHttpLogThreadInit;
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tmm_modules[TMM_LOGHTTPLOG].Func = LogHttpLog;
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tmm_modules[TMM_LOGHTTPLOG].ThreadExitPrintStats = LogHttpLogExitPrintStats;
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tmm_modules[TMM_LOGHTTPLOG].ThreadDeinit = LogHttpLogThreadDeinit;
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tmm_modules[TMM_LOGHTTPLOG].RegisterTests = NULL;
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tmm_modules[TMM_LOGHTTPLOG].cap_flags = 0;
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OutputRegisterModule(MODULE_NAME, "http-log", LogHttpLogInitCtx);
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}
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void TmModuleLogHttpLogIPv4Register (void) {
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tmm_modules[TMM_LOGHTTPLOG4].name = "LogHttpLogIPv4";
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tmm_modules[TMM_LOGHTTPLOG4].ThreadInit = LogHttpLogThreadInit;
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tmm_modules[TMM_LOGHTTPLOG4].Func = LogHttpLogIPv4;
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tmm_modules[TMM_LOGHTTPLOG4].ThreadExitPrintStats = LogHttpLogExitPrintStats;
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tmm_modules[TMM_LOGHTTPLOG4].ThreadDeinit = LogHttpLogThreadDeinit;
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tmm_modules[TMM_LOGHTTPLOG4].RegisterTests = NULL;
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}
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void TmModuleLogHttpLogIPv6Register (void) {
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tmm_modules[TMM_LOGHTTPLOG6].name = "LogHttpLogIPv6";
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tmm_modules[TMM_LOGHTTPLOG6].ThreadInit = LogHttpLogThreadInit;
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tmm_modules[TMM_LOGHTTPLOG6].Func = LogHttpLogIPv6;
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tmm_modules[TMM_LOGHTTPLOG6].ThreadExitPrintStats = LogHttpLogExitPrintStats;
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tmm_modules[TMM_LOGHTTPLOG6].ThreadDeinit = LogHttpLogThreadDeinit;
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tmm_modules[TMM_LOGHTTPLOG6].RegisterTests = NULL;
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}
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typedef struct LogHttpLogThread_ {
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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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uint32_t uri_cnt;
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} LogHttpLogThread;
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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 = (struct tm *)localtime_r(&time, &local_tm);
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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 + 1900, t->tm_hour,
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t->tm_min, t->tm_sec, (uint32_t) ts->tv_usec);
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}
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TmEcode LogHttpLogIPv4(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
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{
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SCEnter();
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LogHttpLogThread *aft = (LogHttpLogThread *)data;
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char timebuf[64];
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size_t idx = 0;
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/* no flow, no htp state */
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if (p->flow == NULL) {
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SCReturnInt(TM_ECODE_OK);
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}
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/* check if we have HTTP state or not */
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SCMutexLock(&p->flow->m);
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uint16_t proto = AppLayerGetProtoFromPacket(p);
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if (proto != ALPROTO_HTTP)
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goto end;
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int r = AppLayerTransactionGetLoggedId(p->flow);
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if (r < 0) {
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goto end;
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}
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size_t logged = (size_t)r;
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r = AppLayerTransactionGetLoggableId(p->flow);
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if (r < 0) {
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goto end;
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}
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size_t loggable = (size_t)r;
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HtpState *htp_state = (HtpState *)AppLayerGetProtoStateFromPacket(p);
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if (htp_state == NULL) {
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SCLogDebug("no http state, so no request logging");
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goto end;
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}
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if (htp_state->connp == NULL)
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goto end;
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htp_tx_t *tx = NULL;
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CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
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char srcip[16], dstip[16];
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Port sp, dp;
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if ((PKT_IS_TOSERVER(p))) {
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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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sp = p->sp;
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dp = p->dp;
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} else {
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inet_ntop(AF_INET, (const void *)GET_IPV4_DST_ADDR_PTR(p), srcip, sizeof(srcip));
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inet_ntop(AF_INET, (const void *)GET_IPV4_SRC_ADDR_PTR(p), dstip, sizeof(dstip));
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sp = p->dp;
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dp = p->sp;
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}
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SCMutexLock(&aft->file_ctx->fp_mutex);
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for (idx = logged; idx < loggable; idx++)
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{
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tx = list_get(htp_state->connp->conn->transactions, idx);
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if (tx == NULL) {
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SCLogDebug("tx is NULL not logging !!");
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continue;
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}
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SCLogDebug("got a HTTP request and now logging !!");
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/* time */
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fprintf(aft->file_ctx->fp, "%s ", timebuf);
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/* hostname */
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if (tx->parsed_uri != NULL &&
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tx->parsed_uri->hostname != NULL)
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{
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PrintRawUriFp(aft->file_ctx->fp,
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(uint8_t *)bstr_ptr(tx->parsed_uri->hostname),
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bstr_len(tx->parsed_uri->hostname));
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} else {
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fprintf(aft->file_ctx->fp, "<hostname unknown>");
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}
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fprintf(aft->file_ctx->fp, " [**] ");
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/* uri */
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if (tx->request_uri != NULL) {
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PrintRawUriFp(aft->file_ctx->fp,
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(uint8_t *)bstr_ptr(tx->request_uri),
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bstr_len(tx->request_uri));
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}
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fprintf(aft->file_ctx->fp, " [**] ");
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/* user agent */
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htp_header_t *h_user_agent = table_getc(tx->request_headers, "user-agent");
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if (h_user_agent != NULL) {
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PrintRawUriFp(aft->file_ctx->fp,
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(uint8_t *)bstr_ptr(h_user_agent->value),
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bstr_len(h_user_agent->value));
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} else {
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fprintf(aft->file_ctx->fp, "<useragent unknown>");
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}
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/* ip/tcp header info */
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fprintf(aft->file_ctx->fp, " [**] %s:%" PRIu16 " -> %s:%" PRIu16 "\n",
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srcip, sp, dstip, dp);
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aft->uri_cnt ++;
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AppLayerTransactionUpdateLoggedId(p->flow);
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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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end:
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SCMutexUnlock(&p->flow->m);
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SCReturnInt(TM_ECODE_OK);
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}
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TmEcode LogHttpLogIPv6(ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
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{
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SCEnter();
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LogHttpLogThread *aft = (LogHttpLogThread *)data;
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char timebuf[64];
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size_t idx = 0;
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/* no flow, no htp state */
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if (p->flow == NULL) {
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SCReturnInt(TM_ECODE_OK);
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}
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/* check if we have HTTP state or not */
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SCMutexLock(&p->flow->m);
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uint16_t proto = AppLayerGetProtoFromPacket(p);
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if (proto != ALPROTO_HTTP)
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goto end;
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int r = AppLayerTransactionGetLoggedId(p->flow);
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if (r < 0) {
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goto end;
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}
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size_t logged = (size_t)r;
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r = AppLayerTransactionGetLoggableId(p->flow);
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if (r < 0) {
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goto end;
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}
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size_t loggable = (size_t)r;
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HtpState *htp_state = (HtpState *)AppLayerGetProtoStateFromPacket(p);
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if (htp_state == NULL) {
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SCLogDebug("no http state, so no request logging");
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goto end;
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}
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if (htp_state->connp == NULL)
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goto end;
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htp_tx_t *tx = NULL;
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CreateTimeString(&p->ts, timebuf, sizeof(timebuf));
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char srcip[46], dstip[46];
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Port sp, dp;
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if ((PKT_IS_TOSERVER(p))) {
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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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sp = p->sp;
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dp = p->dp;
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} else {
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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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sp = p->dp;
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dp = p->sp;
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}
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SCMutexLock(&aft->file_ctx->fp_mutex);
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for (idx = logged; idx < loggable; idx++)
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{
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tx = list_get(htp_state->connp->conn->transactions, idx);
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if (tx == NULL) {
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SCLogDebug("tx is NULL not logging !!");
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continue;
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}
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SCLogDebug("got a HTTP request and now logging !!");
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/* time */
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fprintf(aft->file_ctx->fp, "%s ", timebuf);
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/* hostname */
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if (tx->parsed_uri != NULL &&
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tx->parsed_uri->hostname != NULL)
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{
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PrintRawUriFp(aft->file_ctx->fp,
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(uint8_t *)bstr_ptr(tx->parsed_uri->hostname),
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bstr_len(tx->parsed_uri->hostname));
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} else {
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fprintf(aft->file_ctx->fp, "<hostname unknown>");
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}
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fprintf(aft->file_ctx->fp, " [**] ");
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/* uri */
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if (tx->request_uri != NULL) {
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PrintRawUriFp(aft->file_ctx->fp,
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(uint8_t *)bstr_ptr(tx->request_uri),
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bstr_len(tx->request_uri));
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}
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fprintf(aft->file_ctx->fp, " [**] ");
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/* user agent */
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htp_header_t *h_user_agent = table_getc(tx->request_headers, "user-agent");
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if (h_user_agent != NULL) {
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PrintRawUriFp(aft->file_ctx->fp,
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(uint8_t *)bstr_ptr(h_user_agent->value),
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bstr_len(h_user_agent->value));
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} else {
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fprintf(aft->file_ctx->fp, "<useragent unknown>");
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}
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/* ip/tcp header info */
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fprintf(aft->file_ctx->fp, " [**] %s:%" PRIu16 " -> %s:%" PRIu16 "\n",
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srcip, sp, dstip, dp);
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aft->uri_cnt++;
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AppLayerTransactionUpdateLoggedId(p->flow);
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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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end:
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SCMutexUnlock(&p->flow->m);
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SCReturnInt(TM_ECODE_OK);
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}
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TmEcode LogHttpLog (ThreadVars *tv, Packet *p, void *data, PacketQueue *pq, PacketQueue *postpq)
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{
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SCEnter();
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/* no flow, no htp state */
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if (p->flow == NULL) {
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SCReturnInt(TM_ECODE_OK);
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}
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if (!(PKT_IS_TCP(p))) {
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SCReturnInt(TM_ECODE_OK);
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}
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if (PKT_IS_IPV4(p)) {
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SCReturnInt(LogHttpLogIPv4(tv, p, data, pq, postpq));
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} else if (PKT_IS_IPV6(p)) {
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SCReturnInt(LogHttpLogIPv6(tv, p, data, pq, postpq));
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}
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SCReturnInt(TM_ECODE_OK);
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}
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TmEcode LogHttpLogThreadInit(ThreadVars *t, void *initdata, void **data)
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{
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LogHttpLogThread *aft = SCMalloc(sizeof(LogHttpLogThread));
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if (aft == NULL)
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return TM_ECODE_FAILED;
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memset(aft, 0, sizeof(LogHttpLogThread));
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if(initdata == NULL)
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{
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SCLogDebug("Error getting context for HTTPLog. \"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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/* enable the logger for the app layer */
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AppLayerRegisterLogger(ALPROTO_HTTP);
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*data = (void *)aft;
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return TM_ECODE_OK;
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}
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TmEcode LogHttpLogThreadDeinit(ThreadVars *t, void *data)
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{
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LogHttpLogThread *aft = (LogHttpLogThread *)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(LogHttpLogThread));
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SCFree(aft);
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return TM_ECODE_OK;
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}
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void LogHttpLogExitPrintStats(ThreadVars *tv, void *data) {
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LogHttpLogThread *aft = (LogHttpLogThread *)data;
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if (aft == NULL) {
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return;
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}
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SCLogInfo("(%s) HTTP requests %" PRIu32 "", tv->name, aft->uri_cnt);
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}
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/** \brief Create a new http log LogFileCtx.
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* \param conf Pointer to ConfNode containing this loggers configuration.
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* \return NULL if failure, LogFileCtx* to the file_ctx if succesful
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* */
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OutputCtx *LogHttpLogInitCtx(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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SCLogError(SC_ERR_HTTP_LOG_GENERIC, "LogHttpLogInitCtx: Couldn't "
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"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 LogHttpLog configuration */
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ret=LogHttpLogOpenFileCtx(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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output_ctx->DeInit = LogHttpLogDeInitCtx;
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return output_ctx;
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}
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static void LogHttpLogDeInitCtx(OutputCtx *output_ctx)
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{
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LogFileCtx *logfile_ctx = (LogFileCtx *)output_ctx->data;
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LogFileFreeCtx(logfile_ctx);
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free(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 config_file for loading separate configs
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* \return -1 if failure, 0 if succesful
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* */
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int LogHttpLogOpenFileCtx(LogFileCtx *file_ctx, const char *filename)
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{
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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, 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 0;
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}
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