/* Copyright (C) 2007-2010 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 Anoop Saldanha <poonaatsoc@gmail.com>
 *
 * Implements the fast_pattern keyword
 */

#include "suricata-common.h"
#include "detect.h"
#include "flow.h"
#include "detect-content.h"
#include "detect-parse.h"
#include "detect-engine.h"
#include "detect-engine-mpm.h"
#include "detect-fast-pattern.h"

#include "util-error.h"
#include "util-debug.h"
#include "util-unittest.h"

static int DetectFastPatternSetup(DetectEngineCtx *, Signature *, char *);
void DetectFastPatternRegisterTests(void);

/**
 * \brief Registration function for fast_pattern keyword
 */
void DetectFastPatternRegister(void)
{
    sigmatch_table[DETECT_FAST_PATTERN].name = "fast_pattern";
    sigmatch_table[DETECT_FAST_PATTERN].Match = NULL;
    sigmatch_table[DETECT_FAST_PATTERN].Setup = DetectFastPatternSetup;
    sigmatch_table[DETECT_FAST_PATTERN].Free  = NULL;
    sigmatch_table[DETECT_FAST_PATTERN].RegisterTests = DetectFastPatternRegisterTests;

    sigmatch_table[DETECT_FAST_PATTERN].flags |= SIGMATCH_PAYLOAD;
}

/**
 * \brief Configures the previous content context for a fast_pattern modifier
 *        keyword used in the rule
 *
 * \param de_ctx   Pointer to the Detection Engine Context
 * \param s        Pointer to the Signature to which the current keyword belongs
 * \param m        Pointer to the SigMatch
 * \param null_str Should hold an empty string always
 *
 * \retval  0 On success
 * \retval -1 On failure
 */
static int DetectFastPatternSetup(DetectEngineCtx *de_ctx, Signature *s, char *null_str)
{
    if (null_str != NULL && strcmp(null_str, "") != 0) {
        SCLogError(SC_ERR_INVALID_ARGUMENT, "DetectFastPatternSetup: fast_pattern "
                   "shouldn't be supplied with a value");
        return -1;
    }

    if (s->pmatch_tail == NULL) {
        SCLogError(SC_ERR_INVALID_SIGNATURE, "fast_pattern found inside the "
                     "rule, without any preceding keywords");
        return -1;
    }

    SigMatch *pm = DetectContentGetLastPattern(s->pmatch_tail);
    if (pm == NULL) {
        SCLogError(SC_ERR_INVALID_SIGNATURE, "fast_pattern found inside "
                "the rule, without a content context. Please use a "
                "content keyword before using fast pattern");
        return -1;
    }

    ((DetectContentData *)pm->ctx)->flags |= DETECT_CONTENT_FAST_PATTERN;

    return 0;
}

/*----------------------------------Unittests---------------------------------*/

#ifdef UNITTESTS

/**
 * \test Checks if a fast_pattern is registered in a Signature
 */
int DetectFastPatternTest01(void)
{
    SigMatch *sm = NULL;
    DetectEngineCtx *de_ctx = NULL;
    int result = 0;

    if ( (de_ctx = DetectEngineCtxInit()) == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;
    de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
                               "(content:\"/one/\"; tcpv4-csum:valid; fast_pattern; "
                               "msg:\"Testing fast_pattern\"; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    result = 0;
    sm = de_ctx->sig_list->pmatch;
    while (sm != NULL) {
        if (sm->type == DETECT_CONTENT) {
            if ( ((DetectContentData *)sm->ctx)->flags &
                 DETECT_CONTENT_FAST_PATTERN) {
                result = 1;
                break;
            } else {
                result = 0;
                break;
            }
        }
        sm = sm->next;
    }

 end:
    SigCleanSignatures(de_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks if a fast_pattern is registered in a Signature
 */
int DetectFastPatternTest02(void)
{
    SigMatch *sm = NULL;
    DetectEngineCtx *de_ctx = NULL;
    int result = 0;

    if ( (de_ctx = DetectEngineCtxInit()) == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;
    de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
                               "(content:\"/one/\"; fast_pattern; "
                               "content:boo; fast_pattern; "
                               "msg:\"Testing fast_pattern\"; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    result = 0;
    sm = de_ctx->sig_list->pmatch;
    while (sm != NULL) {
        if (sm->type == DETECT_CONTENT) {
            if (((DetectContentData *)sm->ctx)->flags &
                DETECT_CONTENT_FAST_PATTERN) {
                result = 1;
            } else {
                result = 0;
                break;
            }
        }
        sm = sm->next;
    }

 end:
    SigCleanSignatures(de_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that we have no fast_pattern registerd for a Signature when the
 *       Signature doesn't contain a fast_pattern
 */
int DetectFastPatternTest03(void)
{
    SigMatch *sm = NULL;
    DetectEngineCtx *de_ctx = NULL;
    int result = 0;

    if ( (de_ctx = DetectEngineCtxInit()) == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;
    de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
                               "(content:\"/one/\"; "
                               "msg:\"Testing fast_pattern\"; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    result = 0;
    sm = de_ctx->sig_list->pmatch;
    while (sm != NULL) {
        if (sm->type == DETECT_CONTENT) {
            if ( !(((DetectContentData *)sm->ctx)->flags &
                   DETECT_CONTENT_FAST_PATTERN)) {
                result = 1;
            } else {
                result = 0;
                break;
            }
        }
        sm = sm->next;
    }

 end:
    SigCleanSignatures(de_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a fast_pattern is not registered in a Signature, when we
 *       supply a fast_pattern with an argument
 */
int DetectFastPatternTest04(void)
{
    DetectEngineCtx *de_ctx = NULL;
    int result = 0;

    if ( (de_ctx = DetectEngineCtxInit()) == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;
    de_ctx->sig_list = SigInit(de_ctx, "alert icmp any any -> any any "
                               "(content:\"/one/\"; fast_pattern:boo; "
                               "msg:\"Testing fast_pattern\"; sid:1;)");
    if (de_ctx->sig_list == NULL)
        result = 1;

 end:
    SigCleanSignatures(de_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a fast_pattern is used in the mpm phase.
 */
int DetectFastPatternTest05(void)
{
    uint8_t *buf = (uint8_t *) "Oh strin1.  But what "
        "strin2.  This is strings3.  We strins_str4. we "
        "have strins_string5";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings_str4; content:strings_string5; "
                               "sid:1;)");
    if (de_ctx->sig_list == NULL) {
        printf("sig parse failed: ");
        goto end;
    }

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    if (PacketPatternSearch(&th_v, det_ctx, &p) != 0)
        result = 1;

    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);

    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);

end:
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a fast_pattern is used in the mpm phase.
 */
int DetectFastPatternTest06(void)
{
    uint8_t *buf = (uint8_t *) "Oh this is a string1.  But what is this with "
        "string2.  This is strings3.  We have strings_str4.  We also have "
        "strings_string5";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings_str4; content:strings_string5; "
                               "sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    if (PacketPatternSearch(&th_v, det_ctx, &p) != 0)
        result = 1;

    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);

    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);

end:
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a fast_pattern is used in the mpm phase, when the payload
 *       doesn't contain the fast_pattern string within it.
 */
int DetectFastPatternTest07(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  now here comes our "
        "dark knight strings_string5.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings_str4; content:strings_string5; "
                               "sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    if (PacketPatternSearch(&th_v, det_ctx, &p) == 0)
        result = 1;

    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);

    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);

end:
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a fast_pattern is used in the mpm phase and that we get
 *       exactly 1 match for the mpm phase.
 */
int DetectFastPatternTest08(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  now here comes our "
        "dark knight strings3.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL) {
        printf("de_ctx init: ");
        goto end;
    }

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings_str4; content:strings_string5; "
                               "sid:1;)");
    if (de_ctx->sig_list == NULL) {
        printf("sig parse failed: ");
        goto end;
    }

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    uint32_t r = PacketPatternSearch(&th_v, det_ctx, &p);
    if (r != 1) {
        printf("expected 1, got %"PRIu32": ", r);
        goto end;
    }

    result = 1;
end:
    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);
    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}
/**
 * \test Checks that a fast_pattern is used in the mpm phase, when the payload
 *       doesn't contain the fast_pattern string within it.
 */
int DetectFastPatternTest09(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  no_strings4 _imp now here "
        "comes our dark knight strings3.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings4_imp; fast_pattern; "
                               "content:strings_string5; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    if (PacketPatternSearch(&th_v, det_ctx, &p) == 0)
        result = 1;

    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);

    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);

end:
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a the SigInit chooses the fast_pattern with better pattern
 *       strength, when we have multiple fast_patterns in the Signature.  Also
 *       checks that we get a match for the fast_pattern from the mpm phase.
 */
int DetectFastPatternTest10(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  strings4_imp now here "
        "comes our dark knight strings5.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL) {
        printf("de_ctx init: ");
        goto end;
    }

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings4_imp; fast_pattern; "
                               "content:strings_string5; sid:1;)");
    if (de_ctx->sig_list == NULL) {
        printf("sig parse failed: ");
        goto end;
    }

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    uint32_t r = PacketPatternSearch(&th_v, det_ctx, &p);
    if (r != 1) {
        printf("expected 1, got %"PRIu32": ", r);
        goto end;
    }

    result = 1;
end:
    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);
    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a the SigInit chooses the fast_pattern with better pattern
 *       strength, when we have multiple fast_patterns in the Signature.  Also
 *       checks that we get no matches for the fast_pattern from the mpm phase.
 */
int DetectFastPatternTest11(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  strings5_imp now here "
        "comes our dark knight strings5.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; fast_pattern; "
                               "content:strings4_imp; fast_pattern; "
                               "content:strings_string5; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    if (PacketPatternSearch(&th_v, det_ctx, &p) == 0)
        result = 1;


end:
    if (de_ctx != NULL) {
        SigGroupCleanup(de_ctx);
        SigCleanSignatures(de_ctx);
        if (det_ctx != NULL)
            DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
        DetectEngineCtxFree(de_ctx);
    }
    return result;
}

/**
 * \test Checks that we don't get a match for the mpm phase.
 */
int DetectFastPatternTest12(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  strings5_imp now here "
        "comes our dark knight strings5.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; "
                               "content:strings4_imp; "
                               "content:strings_string5; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    if (PacketPatternSearch(&th_v, det_ctx, &p) == 0)
        result = 1;

    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);

    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);

end:
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks that a the SigInit chooses the fast_pattern with a better
 *       strength from the available patterns, when we don't specify a
 *       fast_pattern.  We also check that we get a match from the mpm
 *       phase.
 */
int DetectFastPatternTest13(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  strings5_imp now here "
        "comes our dark knight strings_string5.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL) {
        printf("de_ctx init: ");
        goto end;
    }

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:string1; "
                               "content:string2; content:strings3; "
                               "content:strings4_imp; "
                               "content:strings_string5; sid:1;)");
    if (de_ctx->sig_list == NULL) {
        printf("sig parse failed: ");
        goto end;
    }

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    /* start the search phase */
    det_ctx->sgh = SigMatchSignaturesGetSgh(de_ctx, det_ctx, &p);
    uint32_t r = PacketPatternSearch(&th_v, det_ctx, &p);
    if (r != 1) {
        printf("expected 1 result, got %"PRIu32": ", r);
        goto end;
    }

    result = 1;
end:
    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);
    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
    DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Checks to make sure that other sigs work that should when fast_pattern is inspecting on the same payload
 *
 */
int DetectFastPatternTest14(void)
{
    uint8_t *buf = (uint8_t *) "Dummy is our name.  Oh yes.  From right here "
        "right now, all the way to hangover.  right.  strings5_imp now here "
        "comes our dark knight strings_string5.  Yes here is our dark knight";
    uint16_t buflen = strlen((char *)buf);
    Packet p;
    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;
    int alertcnt = 0;
    int result = 0;

    memset(&th_v, 0, sizeof(th_v));
    memset(&p, 0, sizeof(p));
    p.src.family = AF_INET;
    p.dst.family = AF_INET;
    p.payload = buf;
    p.payload_len = buflen;
    p.proto = IPPROTO_TCP;

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL)
        goto end;

    FlowInitConfig(FLOW_QUIET);

    de_ctx->mpm_matcher = MPM_B3G;
    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, "alert tcp any any -> any any "
                               "(msg:\"fast_pattern test\"; content:\"strings_string5\"; content:\"knight\"; fast_pattern; sid:1;)");
    if (de_ctx->sig_list == NULL)
        goto end;

    de_ctx->sig_list->next = SigInit(de_ctx, "alert tcp any any -> any any "
                                     "(msg:\"test different content\"; content:\"Dummy is our name\"; sid:2;)");
    if (de_ctx->sig_list->next == NULL)
        goto end;

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
    if (PacketAlertCheck(&p, 1)){
        alertcnt++;
    }else{
        SCLogInfo("could not match on sig 1 with when fast_pattern is inspecting payload");
        goto end;
    }
    if (PacketAlertCheck(&p, 2)){
        result = 1;
    }else{
        SCLogInfo("match on sig 1 fast_pattern no match sig 2 inspecting same payload");
    }
end:
    SigGroupCleanup(de_ctx);
    SigCleanSignatures(de_ctx);

    DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);

    DetectEngineCtxFree(de_ctx);
    FlowShutdown();
    return result;
}

#endif

void DetectFastPatternRegisterTests(void)
{

#ifdef UNITTESTS

    UtRegisterTest("DetectFastPatternTest01", DetectFastPatternTest01, 1);
    UtRegisterTest("DetectFastPatternTest02", DetectFastPatternTest02, 1);
    UtRegisterTest("DetectFastPatternTest03", DetectFastPatternTest03, 1);
    UtRegisterTest("DetectFastPatternTest04", DetectFastPatternTest04, 1);
    UtRegisterTest("DetectFastPatternTest05", DetectFastPatternTest05, 1);
    UtRegisterTest("DetectFastPatternTest06", DetectFastPatternTest06, 1);
    UtRegisterTest("DetectFastPatternTest07", DetectFastPatternTest07, 1);
    UtRegisterTest("DetectFastPatternTest08", DetectFastPatternTest08, 1);
    UtRegisterTest("DetectFastPatternTest09", DetectFastPatternTest09, 1);
    UtRegisterTest("DetectFastPatternTest10", DetectFastPatternTest10, 1);
    UtRegisterTest("DetectFastPatternTest11", DetectFastPatternTest11, 1);
    UtRegisterTest("DetectFastPatternTest12", DetectFastPatternTest12, 1);
    UtRegisterTest("DetectFastPatternTest13", DetectFastPatternTest13, 1);
    UtRegisterTest("DetectFastPatternTest14", DetectFastPatternTest14, 1);

#endif

}