output-tx.c

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/* Copyright (C) 2007-2022 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 Victor Julien <victor@inliniac.net>
 *
 * AppLayer TX Logger Output registration functions
 */
 
#include "suricata-common.h"
#include "output.h"
#include "output-tx.h"
#include "stream.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "util-config.h"
#include "util-profiling.h"
#include "util-validate.h"
 
/** per thread data for this module, contains a list of per thread
 *  data for the packet loggers. */
typedef struct OutputTxLoggerThreadData_ {
    /* thread local data from file api */
    OutputFileLoggerThreadData *file;
    /* thread local data from filedata api */
    OutputFiledataLoggerThreadData *filedata;
    OutputLoggerThreadStore *store[];
} OutputTxLoggerThreadData;
 
/* logger instance, a module + a output ctx,
 * it's perfectly valid that have multiple instances of the same
 * log module (e.g. http.log) with different output ctx'. */
typedef struct OutputTxLogger_ {
    AppProto alproto;
    TxLogger LogFunc;
    TxLoggerCondition LogCondition;
    void *initdata;
    struct OutputTxLogger_ *next;
    const char *name;
    LoggerId logger_id;
    uint32_t id;
    int tc_log_progress;
    int ts_log_progress;
    TmEcode (*ThreadInit)(ThreadVars *, const void *, void **);
    TmEcode (*ThreadDeinit)(ThreadVars *, void *);
} OutputTxLogger;
 
static OutputTxLogger **list = NULL;
 
int SCOutputRegisterTxLogger(LoggerId id, const char *name, AppProto alproto, TxLogger LogFunc,
        void *initdata, int tc_log_progress, int ts_log_progress, TxLoggerCondition LogCondition,
        ThreadInitFunc ThreadInit, ThreadDeinitFunc ThreadDeinit)
{
    if (list == NULL) {
        list = SCCalloc(g_alproto_max, sizeof(OutputTxLogger *));
        if (unlikely(list == NULL)) {
            SCLogError("Failed to allocate OutputTx list");
            return -1;
        }
    }
 
    if (alproto != ALPROTO_UNKNOWN && !(AppLayerParserIsEnabled(alproto))) {
        SCLogDebug(
                "%s logger not enabled: protocol %s is disabled", name, AppProtoToString(alproto));
        return -1;
    }
    OutputTxLogger *op = SCCalloc(1, sizeof(*op));
    if (op == NULL)
        return -1;
 
    op->alproto = alproto;
    op->LogFunc = LogFunc;
    op->LogCondition = LogCondition;
    op->initdata = initdata;
    op->name = name;
    op->logger_id = id;
    op->ThreadInit = ThreadInit;
    op->ThreadDeinit = ThreadDeinit;
 
    if (alproto == ALPROTO_UNKNOWN) {
        op->tc_log_progress = 0;
    } else if (tc_log_progress < 0) {
        op->tc_log_progress =
            AppLayerParserGetStateProgressCompletionStatus(alproto,
                                                           STREAM_TOCLIENT);
    } else {
        op->tc_log_progress = tc_log_progress;
    }
 
    if (alproto == ALPROTO_UNKNOWN) {
        op->ts_log_progress = 0;
    } else if (ts_log_progress < 0) {
        op->ts_log_progress =
            AppLayerParserGetStateProgressCompletionStatus(alproto,
                                                           STREAM_TOSERVER);
    } else {
        op->ts_log_progress = ts_log_progress;
    }
 
    if (list[alproto] == NULL) {
        op->id = 1;
        list[alproto] = op;
    } else {
        OutputTxLogger *t = list[alproto];
        while (t->next)
            t = t->next;
        if (t->id * 2ULL > UINT32_MAX) {
            FatalError("Too many loggers registered.");
        }
        op->id = t->id * 2;
        t->next = op;
    }
 
    SCLogDebug("OutputRegisterTxLogger happy");
    return 0;
}
 
extern bool g_file_logger_enabled;
extern bool g_filedata_logger_enabled;
 
/** \brief run the per tx file logging
 *  \todo clean up various end of tx/stream etc indicators
 */
static inline void OutputTxLogFiles(ThreadVars *tv, OutputFileLoggerThreadData *file_td,
        OutputFiledataLoggerThreadData *filedata_td, Packet *p, Flow *f, void *tx,
        const uint64_t tx_id, AppLayerTxData *txd, const bool tx_complete, const bool ts_ready,
        const bool tc_ready, const bool ts_eof, const bool tc_eof, const bool eof)
{
    uint8_t packet_dir;
    uint8_t opposing_dir;
    bool packet_dir_ready;
    const bool opposing_dir_ready = eof;
    bool opposing_tx_ready;
    if (p->flowflags & FLOW_PKT_TOSERVER) {
        packet_dir = STREAM_TOSERVER;
        opposing_dir = STREAM_TOCLIENT;
        packet_dir_ready = eof | ts_ready | ts_eof;
        opposing_tx_ready = tc_ready;
    } else if (p->flowflags & FLOW_PKT_TOCLIENT) {
        packet_dir = STREAM_TOCLIENT;
        opposing_dir = STREAM_TOSERVER;
        packet_dir_ready = eof | tc_ready | tc_eof;
        opposing_tx_ready = ts_ready;
    } else {
        DEBUG_VALIDATE_BUG_ON(1);
        return;
    }
 
    SCLogDebug("eof %d ts_ready %d ts_eof %d", eof, ts_ready, ts_eof);
    SCLogDebug("eof %d tc_ready %d tc_eof %d", eof, tc_ready, tc_eof);
 
    SCLogDebug("packet dir %s opposing %s packet_dir_ready %d opposing_dir_ready %d",
            packet_dir == STREAM_TOSERVER ? "TOSERVER" : "TOCLIENT",
            opposing_dir == STREAM_TOSERVER ? "TOSERVER" : "TOCLIENT", packet_dir_ready,
            opposing_dir_ready);
 
    AppLayerGetFileState app_files = AppLayerParserGetTxFiles(f, tx, packet_dir);
    FileContainer *ffc = app_files.fc;
    AppLayerGetFileState app_files_opposing = AppLayerParserGetTxFiles(f, tx, opposing_dir);
    FileContainer *ffc_opposing = app_files_opposing.fc;
 
    /* see if opposing side is finished: if no file support in this direction, of is not
     * files and tx is done for opposing dir. */
    bool opposing_finished =
            ffc_opposing == NULL || (ffc_opposing->head == NULL && opposing_tx_ready);
    SCLogDebug("opposing_finished %d ffc_opposing %p ffc_opposing->head %p opposing_tx_ready %d",
            opposing_finished, ffc_opposing, ffc_opposing ? ffc_opposing->head : NULL,
            opposing_tx_ready);
 
    if (ffc || ffc_opposing)
        SCLogDebug("pcap_cnt %" PRIu64 " flow %p tx %p tx_id %" PRIu64
                   " ffc %p ffc_opposing %p tx_complete %d",
                p->pcap_cnt, f, tx, tx_id, ffc, ffc_opposing, tx_complete);
 
    if (ffc) {
        const bool file_close = ((p->flags & PKT_PSEUDO_STREAM_END)) | eof;
        const bool file_trunc = StreamTcpReassembleDepthReached(p) | eof;
        SCLogDebug("tx: calling files: ffc %p head %p file_close %d file_trunc %d", ffc, ffc->head,
                file_close, file_trunc);
        if (filedata_td && txd->files_opened > txd->files_stored)
            OutputFiledataLogFfc(tv, filedata_td, p, app_files, tx, tx_id, txd, packet_dir,
                    file_close, file_trunc, packet_dir);
        if (file_td && txd->files_opened > txd->files_logged)
            OutputFileLogFfc(
                    tv, file_td, p, ffc, tx, tx_id, txd, file_close, file_trunc, packet_dir);
    }
    /* if EOF and we support files, do a final write out */
    if (opposing_dir_ready && ffc_opposing != NULL) {
        const bool file_close = ((p->flags & PKT_PSEUDO_STREAM_END)) | tx_complete | eof;
        const bool file_trunc = StreamTcpReassembleDepthReached(p) | eof;
        opposing_finished = true;
        SCLogDebug("tx: calling for opposing direction files: file_close:%s file_trunc:%s",
                file_close ? "true" : "false", file_trunc ? "true" : "false");
        if (filedata_td && txd->files_opened > txd->files_stored)
            OutputFiledataLogFfc(tv, filedata_td, p, app_files_opposing, tx, tx_id, txd,
                    opposing_dir, file_close, file_trunc, opposing_dir);
        if (file_td && txd->files_opened > txd->files_logged)
            OutputFileLogFfc(tv, file_td, p, ffc_opposing, tx, tx_id, txd, file_close, file_trunc,
                    opposing_dir);
    }
 
    const bool tx_done = packet_dir_ready && opposing_finished;
    SCLogDebug("tx_done %d packet_dir_ready %d opposing_finished %d", tx_done, packet_dir_ready,
            opposing_finished);
 
    /* if not a file tx or if tx is done, set logger flags so tx can move on */
    const bool is_file_tx = (ffc != NULL || ffc_opposing != NULL);
    if (!is_file_tx || tx_done) {
        SCLogDebug("is_file_tx %d tx_done %d", is_file_tx, tx_done);
        if (file_td) {
            txd->logged.flags |= BIT_U32(LOGGER_FILE);
            SCLogDebug("setting LOGGER_FILE => %08x", txd->logged.flags);
        }
        if (filedata_td) {
            txd->logged.flags |= BIT_U32(LOGGER_FILEDATA);
            SCLogDebug("setting LOGGER_FILEDATA => %08x", txd->logged.flags);
        }
    } else {
        SCLogDebug("pcap_cnt %" PRIu64 " flow %p tx %p tx_id %" PRIu64
                   " NOT SETTING FILE FLAGS ffc %p ffc_opposing %p tx_complete %d",
                p->pcap_cnt, f, tx, tx_id, ffc, ffc_opposing, tx_complete);
    }
}
 
static void OutputTxLogList0(ThreadVars *tv, OutputTxLoggerThreadData *op_thread_data, Packet *p,
        Flow *f, void *tx, const uint64_t tx_id)
{
    const OutputTxLogger *logger = list[ALPROTO_UNKNOWN];
    const OutputLoggerThreadStore *store = op_thread_data->store[ALPROTO_UNKNOWN];
 
    DEBUG_VALIDATE_BUG_ON(logger == NULL && store != NULL);
    DEBUG_VALIDATE_BUG_ON(logger != NULL && store == NULL);
    DEBUG_VALIDATE_BUG_ON(logger == NULL && store == NULL);
 
    while (logger && store) {
        DEBUG_VALIDATE_BUG_ON(logger->LogFunc == NULL);
 
        SCLogDebug("logger %p", logger);
 
        /* always invoke "wild card" tx loggers */
        SCLogDebug("Logging tx_id %"PRIu64" to logger %d", tx_id, logger->logger_id);
        PACKET_PROFILING_LOGGER_START(p, logger->logger_id);
        logger->LogFunc(tv, store->thread_data, p, f, f->alstate, tx, tx_id);
        PACKET_PROFILING_LOGGER_END(p, logger->logger_id);
 
        logger = logger->next;
        store = store->next;
 
        DEBUG_VALIDATE_BUG_ON(logger == NULL && store != NULL);
        DEBUG_VALIDATE_BUG_ON(logger != NULL && store == NULL);
    }
}
 
struct Ctx {
    uint32_t tx_logged_old;
    uint32_t tx_logged;
};
 
static void OutputTxLogCallLoggers(ThreadVars *tv, OutputTxLoggerThreadData *op_thread_data,
        const OutputTxLogger *logger, const OutputLoggerThreadStore *store, Packet *p, Flow *f,
        void *alstate, void *tx, const uint64_t tx_id, const AppProto alproto, const bool eof,
        const int tx_progress_ts, const int tx_progress_tc, struct Ctx *ctx)
{
    DEBUG_VALIDATE_BUG_ON(logger == NULL && store != NULL);
    DEBUG_VALIDATE_BUG_ON(logger != NULL && store == NULL);
    // DEBUG_VALIDATE_BUG_ON(logger == NULL && store == NULL);
 
    while (logger && store) {
        DEBUG_VALIDATE_BUG_ON(logger->LogFunc == NULL);
        DEBUG_VALIDATE_BUG_ON(logger->alproto != alproto);
 
        SCLogDebug("logger %p, Alproto %d LogCondition %p, ts_log_progress %d "
                   "tc_log_progress %d",
                logger, logger->alproto, logger->LogCondition, logger->ts_log_progress,
                logger->tc_log_progress);
        if ((ctx->tx_logged_old & BIT_U32(logger->logger_id)) == 0) {
            SCLogDebug("alproto match %d, logging tx_id %" PRIu64, logger->alproto, tx_id);
 
            SCLogDebug("pcap_cnt %" PRIu64 ", tx_id %" PRIu64 " logger %d. EOF %s", p->pcap_cnt,
                    tx_id, logger->logger_id, eof ? "true" : "false");
 
            if (eof) {
                SCLogDebug("EOF, so log now");
            } else {
                if (logger->LogCondition) {
                    if (!logger->LogCondition(tv, p, alstate, tx, tx_id)) {
                        SCLogDebug("conditions not met, not logging");
                        goto next_logger;
                    }
                } else {
                    if (tx_progress_tc < logger->tc_log_progress) {
                        SCLogDebug("progress not far enough, not logging");
                        goto next_logger;
                    }
 
                    if (tx_progress_ts < logger->ts_log_progress) {
                        SCLogDebug("progress not far enough, not logging");
                        goto next_logger;
                    }
                }
            }
 
            SCLogDebug("Logging tx_id %" PRIu64 " to logger %d", tx_id, logger->logger_id);
            PACKET_PROFILING_LOGGER_START(p, logger->logger_id);
            logger->LogFunc(tv, store->thread_data, p, f, alstate, tx, tx_id);
            PACKET_PROFILING_LOGGER_END(p, logger->logger_id);
 
            ctx->tx_logged |= BIT_U32(logger->logger_id);
        }
 
    next_logger:
        logger = logger->next;
        store = store->next;
 
        DEBUG_VALIDATE_BUG_ON(logger == NULL && store != NULL);
        DEBUG_VALIDATE_BUG_ON(logger != NULL && store == NULL);
    }
}
 
static TmEcode OutputTxLog(ThreadVars *tv, Packet *p, void *thread_data)
{
    DEBUG_VALIDATE_BUG_ON(thread_data == NULL);
    if (p->flow == NULL)
        return TM_ECODE_OK;
    if (!PKT_IS_PSEUDOPKT(p) && p->app_update_direction == 0 &&
            ((PKT_IS_TOSERVER(p) && (p->flow->flags & FLOW_TS_APP_UPDATED) == 0) ||
                    (PKT_IS_TOCLIENT(p) && (p->flow->flags & FLOW_TC_APP_UPDATED) == 0))) {
        SCLogDebug("not pseudo, no app update: skip");
        return TM_ECODE_OK;
    }
    if ((p->flags & PKT_STREAM_EST) == 0 && p->proto == IPPROTO_TCP) {
        return TM_ECODE_OK;
    }
    SCLogDebug("pseudo, or app update: run output");
 
    OutputTxLoggerThreadData *op_thread_data = (OutputTxLoggerThreadData *)thread_data;
 
    Flow * const f = p->flow;
    const uint8_t ipproto = f->proto;
    const AppProto alproto = f->alproto;
    SCLogDebug("pcap_cnt %u tx logging %u/%s", (uint32_t)p->pcap_cnt, alproto,
            AppProtoToString(alproto));
 
    const bool file_logging_active = (op_thread_data->file || op_thread_data->filedata);
    if (!file_logging_active) {
        if (list[alproto] == NULL && list[ALPROTO_UNKNOWN] == NULL) {
            SCLogDebug("bail");
            /* No child loggers registered. */
            return TM_ECODE_OK;
        }
        if (AppLayerParserProtocolHasLogger(ipproto, alproto) == 0)
            goto end;
    }
    void *alstate = f->alstate;
    if (alstate == NULL) {
        SCLogDebug("no alstate");
        goto end;
    }
    const LoggerId logger_expectation = AppLayerParserProtocolGetLoggerBits(ipproto, alproto);
    if (logger_expectation == 0) {
        SCLogDebug("bail: logger_expectation %u. LOGGER_FILE %u LOGGER_FILEDATA %u",
                logger_expectation, LOGGER_FILE, LOGGER_FILEDATA);
        goto end;
    }
    SCLogDebug("pcap_cnt %" PRIu64, p->pcap_cnt);
 
    const bool last_pseudo = (p->flowflags & FLOW_PKT_LAST_PSEUDO) != 0;
    const bool ts_eof = SCAppLayerParserStateIssetFlag(f->alparser, APP_LAYER_PARSER_EOF_TS) != 0;
    const bool tc_eof = SCAppLayerParserStateIssetFlag(f->alparser, APP_LAYER_PARSER_EOF_TC) != 0;
 
    const bool eof = last_pseudo || (ts_eof && tc_eof);
    SCLogDebug("eof %d last_pseudo %d ts_eof %d tc_eof %d", eof, last_pseudo, ts_eof, tc_eof);
 
    const uint8_t ts_disrupt_flags = FlowGetDisruptionFlags(f, STREAM_TOSERVER);
    const uint8_t tc_disrupt_flags = FlowGetDisruptionFlags(f, STREAM_TOCLIENT);
    SCLogDebug("ts_disrupt_flags %02x tc_disrupt_flags %02x", ts_disrupt_flags, tc_disrupt_flags);
    const uint64_t total_txs = AppLayerParserGetTxCnt(f, alstate);
    uint64_t tx_id = AppLayerParserGetTransactionLogId(f->alparser);
    uint64_t max_id = tx_id;
    int logged = 0;
    bool gap = false;
    const bool support_files = AppLayerParserSupportsFiles(ipproto, alproto);
    const uint8_t pkt_dir = STREAM_FLAGS_FOR_PACKET(p);
 
    SCLogDebug("pcap_cnt %" PRIu64 ": tx_id %" PRIu64 " total_txs %" PRIu64, p->pcap_cnt, tx_id,
            total_txs);
 
    AppLayerGetTxIteratorFunc IterFunc = AppLayerGetTxIterator(ipproto, alproto);
    AppLayerGetTxIterState state;
    memset(&state, 0, sizeof(state));
 
    const int complete_ts =
            AppLayerParserGetStateProgressCompletionStatus(alproto, STREAM_TOSERVER);
    const int complete_tc =
            AppLayerParserGetStateProgressCompletionStatus(alproto, STREAM_TOCLIENT);
    while (1) {
        AppLayerGetTxIterTuple ires = IterFunc(ipproto, alproto, alstate, tx_id, total_txs, &state);
        if (ires.tx_ptr == NULL)
            break;
        void * const tx = ires.tx_ptr;
        tx_id = ires.tx_id;
        SCLogDebug("STARTING tx_id %" PRIu64 ", tx %p", tx_id, tx);
 
        AppLayerTxData *txd = AppLayerParserGetTxData(ipproto, alproto, tx);
 
        const int tx_progress_ts =
                AppLayerParserGetStateProgress(ipproto, alproto, tx, ts_disrupt_flags);
        const int tx_progress_tc =
                AppLayerParserGetStateProgress(ipproto, alproto, tx, tc_disrupt_flags);
        const bool tx_complete = (tx_progress_ts == complete_ts && tx_progress_tc == complete_tc);
 
        SCLogDebug("file_thread_data %p filedata_thread_data %p", op_thread_data->file,
                op_thread_data->filedata);
 
        if (file_logging_active) {
            if (txd->file_tx != 0) { // need to process each tx that might be a file tx,
                                     // even if there are not files (yet)
                const bool ts_ready = (tx_progress_ts == complete_ts);
                const bool tc_ready = (tx_progress_tc == complete_tc);
                SCLogDebug("ts_ready %d tc_ready %d", ts_ready, tc_ready);
 
                const bool eval_files = ts_ready | tc_ready | tx_complete | ts_eof | tc_eof | eof;
 
                SCLogDebug("eval_files: %u, ts_ready %u, tc_ready %u, tx_complete %u, ts_eof %u, "
                           "tc_eof %u, eof %u",
                        eval_files, ts_ready, tc_ready, tx_complete, ts_eof, tc_eof, eof);
                SCLogDebug("txd->file_tx & pkt_dir: %02x & %02x -> %02x", txd->file_tx, pkt_dir,
                        (txd->file_tx & pkt_dir));
 
                /* call only for the correct direction, except when it looks anything like a end of
                 * transaction or end of stream. Since OutputTxLogFiles has complicated logic around
                 * that, we just leave it to that function to sort things out for now. */
                if (eval_files || ((txd->file_tx & pkt_dir) != 0)) {
                    OutputTxLogFiles(tv, op_thread_data->file, op_thread_data->filedata, p, f, tx,
                            tx_id, txd, tx_complete, ts_ready, tc_ready, ts_eof, tc_eof, eof);
                }
            } else if (support_files) {
                if (op_thread_data->file) {
                    txd->logged.flags |= BIT_U32(LOGGER_FILE);
                    SCLogDebug("not a file_tx: setting LOGGER_FILE => %08x", txd->logged.flags);
                }
                if (op_thread_data->filedata) {
                    txd->logged.flags |= BIT_U32(LOGGER_FILEDATA);
                    SCLogDebug("not a file_tx: setting LOGGER_FILEDATA => %08x", txd->logged.flags);
                }
            }
        }
        SCLogDebug("logger: expect %08x, have %08x", logger_expectation, txd->logged.flags);
        if (!txd->updated_tc && !txd->updated_ts && !(tx_progress_ts == complete_ts) &&
                !(tx_progress_tc == complete_tc) && !ts_eof && !tc_eof) {
            gap = true;
            goto next_tx;
        }
 
        if (list[ALPROTO_UNKNOWN] != 0) {
            OutputTxLogList0(tv, op_thread_data, p, f, tx, tx_id);
            if (list[alproto] == NULL)
                goto next_tx;
        }
 
        SCLogDebug("tx %p/%" PRIu64 " txd %p: log_flags %x logger_expectation %x", tx, tx_id, txd,
                txd->config.log_flags, logger_expectation);
        if (txd->config.log_flags & BIT_U8(CONFIG_TYPE_TX)) {
            SCLogDebug("SKIP tx %p/%"PRIu64, tx, tx_id);
            // so that AppLayerParserTransactionsCleanup can clean this tx
            txd->logged.flags |= logger_expectation;
            goto next_tx;
        }
 
        if (txd->logged.flags == logger_expectation) {
            SCLogDebug("fully logged");
            /* tx already fully logged */
            goto next_tx;
        }
 
        SCLogDebug("logger: expect %08x, have %08x", logger_expectation, txd->logged.flags);
        const OutputTxLogger *logger = list[alproto];
        const OutputLoggerThreadStore *store = op_thread_data->store[alproto];
        struct Ctx ctx = { .tx_logged = txd->logged.flags, .tx_logged_old = txd->logged.flags };
        SCLogDebug("logger: expect %08x, have %08x", logger_expectation, ctx.tx_logged);
 
        OutputTxLogCallLoggers(tv, op_thread_data, logger, store, p, f, alstate, tx, tx_id, alproto,
                eof, tx_progress_ts, tx_progress_tc, &ctx);
 
        SCLogDebug("logger: expect %08x, have %08x", logger_expectation, ctx.tx_logged);
        if (ctx.tx_logged != ctx.tx_logged_old) {
            SCLogDebug("logger: storing %08x (was %08x)", ctx.tx_logged, ctx.tx_logged_old);
            DEBUG_VALIDATE_BUG_ON(txd == NULL);
            txd->logged.flags |= ctx.tx_logged;
        }
 
        /* If all loggers logged set a flag and update the last tx_id
         * that was logged.
         *
         * If not all loggers were logged we flag that there was a gap
         * so any subsequent transactions in this loop don't increase
         * the maximum ID that was logged. */
        if (!gap && ctx.tx_logged == logger_expectation) {
            SCLogDebug("no gap %d, %08x == %08x", gap, ctx.tx_logged, logger_expectation);
            logged = 1;
            max_id = tx_id;
            SCLogDebug("max_id %" PRIu64, max_id);
        } else {
            gap = true;
        }
next_tx:
        if (!ires.has_next)
            break;
        tx_id++;
    }
 
    /* Update the last ID that has been logged with all
     * transactions before it. */
    if (logged) {
        SCLogDebug("updating log tx_id %"PRIu64, max_id);
        AppLayerParserSetTransactionLogId(f->alparser, max_id + 1);
    }
 
end:
    return TM_ECODE_OK;
}
 
/** \brief thread init for the tx logger
 *  This will run the thread init functions for the individual registered
 *  loggers */
static TmEcode OutputTxLogThreadInit(ThreadVars *tv, const void *_initdata, void **data)
{
    OutputTxLoggerThreadData *td =
            SCCalloc(1, sizeof(*td) + g_alproto_max * sizeof(OutputLoggerThreadStore *));
    if (td == NULL)
        return TM_ECODE_FAILED;
 
    *data = (void *)td;
    SCLogDebug("OutputTxLogThreadInit happy (*data %p)", *data);
 
    for (AppProto alproto = 0; alproto < g_alproto_max; alproto++) {
        OutputTxLogger *logger = list[alproto];
        while (logger) {
            if (logger->ThreadInit) {
                void *retptr = NULL;
                if (logger->ThreadInit(tv, logger->initdata, &retptr) == TM_ECODE_OK) {
                    OutputLoggerThreadStore *ts = SCCalloc(1, sizeof(*ts));
                    /* todo */ BUG_ON(ts == NULL);
 
                    /* store thread handle */
                    ts->thread_data = retptr;
 
                    if (td->store[alproto] == NULL) {
                        td->store[alproto] = ts;
                    } else {
                        OutputLoggerThreadStore *tmp = td->store[alproto];
                        while (tmp->next != NULL)
                            tmp = tmp->next;
                        tmp->next = ts;
                    }
 
                    SCLogDebug("%s is now set up", logger->name);
                }
            }
 
            logger = logger->next;
        }
    }
 
    if (g_file_logger_enabled) {
        if (OutputFileLogThreadInit(tv, &td->file) != TM_ECODE_OK) {
            FatalError("failed to set up file thread data");
        }
    }
    if (g_filedata_logger_enabled) {
        if (OutputFiledataLogThreadInit(tv, &td->filedata) != TM_ECODE_OK) {
            FatalError("failed to set up filedata thread data");
        }
    }
 
    SCLogDebug("file_thread_data %p filedata_thread_data %p", td->file, td->filedata);
 
    return TM_ECODE_OK;
}
 
static TmEcode OutputTxLogThreadDeinit(ThreadVars *tv, void *thread_data)
{
    OutputTxLoggerThreadData *op_thread_data = (OutputTxLoggerThreadData *)thread_data;
 
    for (AppProto alproto = 0; alproto < g_alproto_max; alproto++) {
        OutputLoggerThreadStore *store = op_thread_data->store[alproto];
        OutputTxLogger *logger = list[alproto];
 
        while (logger && store) {
            if (logger->ThreadDeinit) {
                logger->ThreadDeinit(tv, store->thread_data);
            }
 
            OutputLoggerThreadStore *next_store = store->next;
            SCFree(store);
            store = next_store;
            logger = logger->next;
        }
    }
 
    if (op_thread_data->file) {
        OutputFileLogThreadDeinit(tv, op_thread_data->file);
    }
    if (op_thread_data->filedata) {
        OutputFiledataLogThreadDeinit(tv, op_thread_data->filedata);
    }
 
    SCFree(op_thread_data);
    return TM_ECODE_OK;
}
 
static uint32_t OutputTxLoggerGetActiveCount(void)
{
    uint32_t cnt = 0;
    for (AppProto alproto = 0; alproto < g_alproto_max; alproto++) {
        for (OutputTxLogger *p = list[alproto]; p != NULL; p = p->next) {
            cnt++;
        }
    }
 
    if (g_file_logger_enabled) {
        cnt++;
        SCLogDebug("g_file_logger_enabled");
    }
    if (g_filedata_logger_enabled) {
        cnt++;
        SCLogDebug("g_filedata_logger_enabled");
    }
 
    return cnt;
}
 
 
void OutputTxLoggerRegister (void)
{
    BUG_ON(list);
    list = SCCalloc(g_alproto_max, sizeof(OutputTxLogger *));
    if (unlikely(list == NULL)) {
        FatalError("Failed to allocate OutputTx list");
    }
    OutputRegisterRootLogger(OutputTxLogThreadInit, OutputTxLogThreadDeinit, OutputTxLog,
            OutputTxLoggerGetActiveCount);
}
 
void OutputTxShutdown(void)
{
    // called in different places because of unix socket mode, and engine-analysis mode
    if (list == NULL) {
        return;
    }
    for (AppProto alproto = 0; alproto < g_alproto_max; alproto++) {
        OutputTxLogger *logger = list[alproto];
        while (logger) {
            OutputTxLogger *next_logger = logger->next;
            SCFree(logger);
            logger = next_logger;
        }
        list[alproto] = NULL;
    }
    SCFree(list);
    list = NULL;
}