diff options
Diffstat (limited to 'framework/src/suricata/src/output-json-smtp.c')
| -rw-r--r-- | framework/src/suricata/src/output-json-smtp.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/framework/src/suricata/src/output-json-smtp.c b/framework/src/suricata/src/output-json-smtp.c new file mode 100644 index 00000000..f722c383 --- /dev/null +++ b/framework/src/suricata/src/output-json-smtp.c @@ -0,0 +1,224 @@ +/* Copyright (C) 2007-2013 Open Information Security Foundation + * + * You can copy, redistribute or modify this Program under the terms of + * the GNU General Public License version 2 as published by the Free + * Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +/** + * \file + * + * \author Tom DeCanio <td@npulsetech.com> + * + * Implements SMTP JSON logging portion of the engine. + */ + +#include "suricata-common.h" +#include "debug.h" +#include "detect.h" +#include "pkt-var.h" +#include "conf.h" + +#include "threads.h" +#include "threadvars.h" +#include "tm-threads.h" + +#include "util-print.h" +#include "util-unittest.h" + +#include "util-debug.h" + +#include "output.h" +#include "app-layer-smtp.h" +#include "app-layer.h" +#include "app-layer-parser.h" +#include "util-privs.h" +#include "util-buffer.h" +#include "util-proto-name.h" +#include "util-logopenfile.h" +#include "util-time.h" + +#include "output-json.h" +#include "output-json-email-common.h" + +#ifdef HAVE_LIBJANSSON +#include <jansson.h> + +static int JsonSmtpLogger(ThreadVars *tv, void *thread_data, const Packet *p, Flow *f, void *state, void *tx, uint64_t tx_id) +{ + SCEnter(); + int r = JsonEmailLogger(tv, thread_data, p, f, state, tx, tx_id); + SCReturnInt(r); +} + +static void OutputSmtpLogDeInitCtx(OutputCtx *output_ctx) +{ + OutputJsonEmailCtx *email_ctx = output_ctx->data; + if (email_ctx != NULL) { + LogFileFreeCtx(email_ctx->file_ctx); + SCFree(email_ctx); + } + SCFree(output_ctx); +} + +static void OutputSmtpLogDeInitCtxSub(OutputCtx *output_ctx) +{ + SCLogDebug("cleaning up sub output_ctx %p", output_ctx); + OutputJsonEmailCtx *email_ctx = output_ctx->data; + if (email_ctx != NULL) { + SCFree(email_ctx); + } + SCFree(output_ctx); +} + +#define DEFAULT_LOG_FILENAME "smtp.json" +OutputCtx *OutputSmtpLogInit(ConfNode *conf) +{ + LogFileCtx *file_ctx = LogFileNewCtx(); + if(file_ctx == NULL) { + SCLogError(SC_ERR_HTTP_LOG_GENERIC, "couldn't create new file_ctx"); + return NULL; + } + + if (SCConfLogOpenGeneric(conf, file_ctx, DEFAULT_LOG_FILENAME, 1) < 0) { + LogFileFreeCtx(file_ctx); + return NULL; + } + + OutputJsonEmailCtx *email_ctx = SCMalloc(sizeof(OutputJsonEmailCtx)); + if (unlikely(email_ctx == NULL)) { + LogFileFreeCtx(file_ctx); + return NULL; + } + + OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx)); + if (unlikely(output_ctx == NULL)) { + LogFileFreeCtx(file_ctx); + SCFree(email_ctx); + return NULL; + } + + email_ctx->file_ctx = file_ctx; + + output_ctx->data = email_ctx; + output_ctx->DeInit = OutputSmtpLogDeInitCtx; + + /* enable the logger for the app layer */ + AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SMTP); + + return output_ctx; +} + +static OutputCtx *OutputSmtpLogInitSub(ConfNode *conf, OutputCtx *parent_ctx) +{ + OutputJsonCtx *ojc = parent_ctx->data; + + OutputJsonEmailCtx *email_ctx = SCMalloc(sizeof(OutputJsonEmailCtx)); + if (unlikely(email_ctx == NULL)) + return NULL; + + OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx)); + if (unlikely(output_ctx == NULL)) { + SCFree(email_ctx); + return NULL; + } + + email_ctx->file_ctx = ojc->file_ctx; + + output_ctx->data = email_ctx; + output_ctx->DeInit = OutputSmtpLogDeInitCtxSub; + + /* enable the logger for the app layer */ + AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SMTP); + + return output_ctx; +} + +#define OUTPUT_BUFFER_SIZE 65535 +static TmEcode JsonSmtpLogThreadInit(ThreadVars *t, void *initdata, void **data) +{ + JsonEmailLogThread *aft = SCMalloc(sizeof(JsonEmailLogThread)); + if (unlikely(aft == NULL)) + return TM_ECODE_FAILED; + memset(aft, 0, sizeof(JsonEmailLogThread)); + + if(initdata == NULL) + { + SCLogDebug("Error getting context for HTTPLog. \"initdata\" argument NULL"); + SCFree(aft); + return TM_ECODE_FAILED; + } + + /* Use the Ouptut Context (file pointer and mutex) */ + aft->emaillog_ctx = ((OutputCtx *)initdata)->data; + + aft->buffer = MemBufferCreateNew(OUTPUT_BUFFER_SIZE); + if (aft->buffer == NULL) { + SCFree(aft); + return TM_ECODE_FAILED; + } + + *data = (void *)aft; + return TM_ECODE_OK; +} + +static TmEcode JsonSmtpLogThreadDeinit(ThreadVars *t, void *data) +{ + JsonEmailLogThread *aft = (JsonEmailLogThread *)data; + if (aft == NULL) { + return TM_ECODE_OK; + } + + MemBufferFree(aft->buffer); + /* clear memory */ + memset(aft, 0, sizeof(JsonEmailLogThread)); + + SCFree(aft); + return TM_ECODE_OK; +} + +void TmModuleJsonSmtpLogRegister (void) { + tmm_modules[TMM_JSONSMTPLOG].name = "JsonSmtpLog"; + tmm_modules[TMM_JSONSMTPLOG].ThreadInit = JsonSmtpLogThreadInit; + tmm_modules[TMM_JSONSMTPLOG].ThreadDeinit = JsonSmtpLogThreadDeinit; + tmm_modules[TMM_JSONSMTPLOG].RegisterTests = NULL; + tmm_modules[TMM_JSONSMTPLOG].cap_flags = 0; + tmm_modules[TMM_JSONSMTPLOG].flags = TM_FLAG_LOGAPI_TM; + + /* register as separate module */ + OutputRegisterTxModule("JsonSmtpLog", "smtp-json-log", + OutputSmtpLogInit, ALPROTO_SMTP, + JsonSmtpLogger); + + /* also register as child of eve-log */ + OutputRegisterTxSubModule("eve-log", "JsonSmtpLog", + "eve-log.smtp", + OutputSmtpLogInitSub, ALPROTO_SMTP, + JsonSmtpLogger); +} + +#else + +static TmEcode OutputJsonThreadInit(ThreadVars *t, void *initdata, void **data) +{ + SCLogInfo("Can't init JSON output - JSON support was disabled during build."); + return TM_ECODE_FAILED; +} + +void TmModuleJsonSmtpLogRegister (void) +{ + tmm_modules[TMM_JSONSMTPLOG].name = "JsonSmtpLog"; + tmm_modules[TMM_JSONSMTPLOG].ThreadInit = OutputJsonThreadInit; +} + +#endif |