suricata/src/detect-content.c

/* Simple content match part of the detection engine.
 *
 * Copyright (C) 2008 by Victor Julien <victor@inliniac.net> */

/* This is a very important part of the detection engine, and certainly one
 * of the most complex parts. String searching is complex and expensive,
 * and thus worth optimizing. The way that is done here is by only running
 * the pattern matcher once for every packet. In this search, all search words,
 * the 'content' matches, are looked for. All results, of all the search words
 * are stored in a array of lists. The array is an array of MpmMatchBucket's,
 * that can be entered through the DetectContentData id field. There, it finds
 * the bucket containing a list of 0, 1, or more matches of that content match.
 * The list contains MpmMatch items, that contain an offset field. This field
 * is the possition of the last character in the match.
 *
 * 03/22/2008 -- VJ:
 * Recursive capture runs do something special to the depth and offset: the
 * settings are only considered for the initial match. For the next matches,
 * they are not. The reason is that this way we can still anchor the first
 * match to a specific part of the payload, while the rest can be handled
 * by content and pcre matches.
 *
 * 06/11/2009 -- PR:
 * Now Patterns that exceed the max_pattern_length allowed by the current mpm
 * are split into multiple chunk. The modifiers must be set in the first
 * chunk of a group of chunks, and after a modifier is set, the modifiers of the
 * next chunks must be recalculated (propagated). This way, each DETECT_CONTENT
 * installed should be completely independent, as if it were loaded in another
 * content option of the signature.
 *
 * TODO: add a 'recursive depth' to limit the depth to do the recursion on...
 *
 * XXX more later....
 *
 */

#include "eidps-common.h"
#include "decode.h"
#include "detect.h"
#include "detect-content.h"
#include "detect-uricontent.h"
#include "detect-engine-mpm.h"
#include "detect-engine.h"
#include "detect-parse.h"
#include "util-mpm.h"
#include "flow.h"
#include "flow-var.h"
#include "detect-flow.h"
#include "util-unittest.h"
#include "util-print.h"
#include "util-debug.h"
#include "threads.h"

int DetectContentMatch (ThreadVars *, DetectEngineThreadCtx *, Packet *, Signature *, SigMatch *);
int DetectContentSetup (DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectContentRegisterTests(void);

void DetectContentRegister (void) {
    sigmatch_table[DETECT_CONTENT].name = "content";
    sigmatch_table[DETECT_CONTENT].Match = DetectContentMatch;
    sigmatch_table[DETECT_CONTENT].Setup = DetectContentSetup;
    sigmatch_table[DETECT_CONTENT].Free  = DetectContentFree;
    sigmatch_table[DETECT_CONTENT].RegisterTests = DetectContentRegisterTests;

    sigmatch_table[DETECT_CONTENT].flags |= SIGMATCH_PAYLOAD;
}

/* pass on the content_max_id */
uint32_t DetectContentMaxId(DetectEngineCtx *de_ctx) {
    //SCLogDebug("DetectContentMaxId: %" PRIu32 "", de_ctx->content_max_id);
    return de_ctx->content_max_id;
}

static inline int
TestOffsetDepth(MpmMatch *m, DetectContentData *co, uint16_t pktoff) {
    if (m->offset >= pktoff) {
        if (co->offset == 0 ||
           (co->offset && m->offset >= co->offset)) {
            if (co->depth == 0 ||
               (co->depth && (m->offset+co->content_len) <= co->depth))
            {
                SCLogDebug("depth %" PRIu32 ", offset %" PRIu32 ", m->offset %" PRIu32 ", return 1",
                        co->depth, co->offset, m->offset);
                return 1;
            }
        }
    }
    SCLogDebug("depth %" PRIu32 ", offset %" PRIu32 ", m->offset %" PRIu32 ", return 0",
        co->depth, co->offset, m->offset);
    return 0;
}

/** \brief test the within, distance, offset and depth of a match
 *
 *         This function is called recursively (if nescessary) to be able
 *         to determine whether or not a chain of content matches connected
 *         with 'within' and 'distance' options fully matches. The reason it
 *         was done like this is to make sure we can handle partial matches
 *         that turn out to fail being followed by full matches later in the
 *         packet. This adds some runtime complexity however.
 *
 *         WITHIN
 *         The within check, if enabled, works as follows. The check is done
 *         against the current match "m". This is the pattern that we check
 *         the next against. So we will figure out if the next pattern exists
 *         within X bytes of "m".
 *
 *         To do this, we take the next pattern (nsm) and loop through all
 *         matches of it. We then for each of the matches "nm" below, see if
 *         it is in the within limit.
 *
 *         The within limit is checked as follows. It's checked against the
 *         current match "m". "m->offset" indicates the start of that match.
 *         So we need to consider m->offset + co->content_len. This will give
 *         us the end of the match "m". The next match then needs to occur
 *         before that point + the lenght of the pattern we're checking,
 *         nco->content_len.
 *
 *  \param t thread vars
 *  \param det_ctx thread local data of the detection engine ctx
 *  \param m match we are inspecting
 *  \param nm current sigmatch to work with
 *  \param nsm next sigmatch to work with
 *  \param pktoff packet offset
 */
static inline int
TestWithinDistanceOffsetDepth(ThreadVars *t, DetectEngineThreadCtx *det_ctx, MpmMatch *m, SigMatch *sm, SigMatch *nsm, uint16_t pktoff)
{
    if (nsm == NULL)
        return 1;

    /** content match of current pattern */
    DetectContentData *co = (DetectContentData *)sm->ctx;
    /** content match of next pattern */
    DetectContentData *nco = (DetectContentData *)nsm->ctx;
    /** list of matches of the next pattern */
    MpmMatch *nm = det_ctx->mtc.match[nco->id].top;

    /* recursively check if we have a next pattern that matches */
    for (; nm; nm = nm->next) {
        SCLogDebug("nm->offset %" PRIu32 ", m->offset %" PRIu32 ", pktoff %" PRIu32 "", nm->offset, m->offset, pktoff);
        SCLogDebug("nm->offset + nco->content_len = %"PRIu32" + %"PRIu32" = %"PRIu32"",
                nm->offset, nco->content_len, nm->offset + nco->content_len);
        SCLogDebug("within (0 if disabled) = %"PRIu32" (nco->within %"PRIu32" + co->content_len %"PRIu32")",
                nco->flags & DETECT_CONTENT_WITHIN ? (nco->within + co->content_len) : 0, nco->within, co->content_len);

        if (nm->offset >= pktoff) {
            if ((!(nco->flags & DETECT_CONTENT_WITHIN) ||
                (nco->within > 0 && (nm->offset > m->offset) &&
                (((nm->offset + nco->content_len) - m->offset) <= (nco->within + co->content_len)))))
            {
                SCLogDebug("MATCH: %" PRIu32 " <= WITHIN(%" PRIu32 ")",
                        (nm->offset + nco->content_len) - m->offset,
                        nco->within + co->content_len);

                if (!(nco->flags & DETECT_CONTENT_DISTANCE) ||
                    ((nm->offset >= (m->offset + co->content_len)) &&
                    ((nm->offset - (m->offset + co->content_len)) >= nco->distance)))
                {
                    SCLogDebug("MATCH: %" PRIu32 " >= DISTANCE(%" PRIu32 ")",
                        nm->offset - (m->offset + co->content_len), nco->distance);

                    if (TestOffsetDepth(nm, nco, pktoff) == 1) {
                        SigMatch *real_nsm_next = DetectContentFindNextApplicableSM(nsm->next);
                        return TestWithinDistanceOffsetDepth(t, det_ctx, nm, nsm, real_nsm_next, pktoff);
                    }
                } else {
                    SCLogDebug("NO MATCH: %" PRIu32 " < DISTANCE(%" PRIu32 ")",
                        nm->offset - (m->offset + co->content_len), nco->distance);
                }
            } else {
                if (nm->offset <= m->offset) {
                    SCLogDebug("NO MATCH: nm->offset before or on m->offset: %"PRIu32" <= %"PRIu32"",
                            nm->offset, m->offset);
                } else {
                    SCLogDebug("NO MATCH: %" PRIu32 " > WITHIN(%" PRIu32 ")",
                            (nm->offset + nco->content_len) - m->offset,
                            (nco->within + co->content_len));
                }
            }
        }
    }
    return 0;
}

static inline int
DoDetectContent(ThreadVars *t, DetectEngineThreadCtx *det_ctx, Packet *p, Signature *s, SigMatch *sm, DetectContentData *co)
{
    int ret = 0;
    char match = 0;

    /* Get the top match, we already know we have one. */
    MpmMatch *m = det_ctx->mtc.match[co->id].top;

    SCLogDebug("det_ctx->mtc.match[co->id].len %"PRIu32"", det_ctx->mtc.match[co->id].len);

    /*  if we have within or distance coming up next, check this match
     *  for distance and/or within and check the rest of this match
     *  chain as well. */
    if ((co->flags & DETECT_CONTENT_WITHIN_NEXT ||
         co->flags & DETECT_CONTENT_DISTANCE_NEXT) &&
         det_ctx->de_checking_distancewithin == 0)
    {
        SCLogDebug("DETECT_CONTENT_WITHIN_NEXT is %s",
            co->flags & DETECT_CONTENT_WITHIN_NEXT ? "true":"false");
        SCLogDebug("DETECT_CONTENT_DISTANCE_NEXT is %s",
            co->flags & DETECT_CONTENT_DISTANCE_NEXT ? "true":"false");

        /* indicate to the detection engine the next sigmatch(es)
         * are part of this match chain */
        det_ctx->de_checking_distancewithin = 1;

        for (; m != NULL; m = m->next) {
            /* first check our match for offset and depth */
            if (TestOffsetDepth(m, co, det_ctx->pkt_off) == 1) {
                SCLogDebug("TestOffsetDepth returned 1, for co->id %"PRIu32"", co->id);

                SigMatch *real_sm_next = DetectContentFindNextApplicableSM(sm->next);
                ret = TestWithinDistanceOffsetDepth(t, det_ctx, m, sm, real_sm_next, det_ctx->pkt_off);

                if (ret == 1) {
                    SCLogDebug("TestWithinDistanceOffsetDepth returned 1");
                    det_ctx->pkt_ptr = p->payload + m->offset;
                    det_ctx->pkt_off = m->offset;
                    match = 1;
                    break;
                }
            }
        }

    /* Okay, this is complicated... on the first match of a match chain,
     * we do the whole match of that chain (a chain here means a number
     * of consecutive content matches that relate to each other with
     * 'within and/or 'distance options'). But we still get to the next
     * sigmatches. We have already inspected this sigmatch, even for
     * offset and depth. Since the fact that we get there means we have
     * had a match, we return match here too.
     */
    } else if (co->flags & DETECT_CONTENT_WITHIN ||
               co->flags & DETECT_CONTENT_DISTANCE)
    {
        det_ctx->de_checking_distancewithin = 0;
        match = 1;

    /* Getting here means we are not in checking an within/distance chain.
     * This means we can just inspect this content match on it's own. So
     * Let's see if at least one of the matches within the offset and depth
     * settings. If so, return a match.
     */
    } else {
        /* when in recursive capture mode don't check depth and offset
         * after the first match */
        if (s->flags & SIG_FLAG_RECURSIVE && det_ctx->pkt_cnt) {
            for (; m != NULL; m = m->next) {
                if (m->offset >= det_ctx->pkt_off) {
                    /* update pkt ptrs, content doesn't use this,
                     * but pcre does */
                    det_ctx->pkt_ptr = p->payload + m->offset;
                    det_ctx->pkt_off = m->offset;
                    match = 1;
                    break;
                }
            }
        } else {
            for (; m != NULL; m = m->next) {
                ret = TestOffsetDepth(m,co, 0); /* no offset as we inspect each
                                                 * match on it's own */
                if (ret == 1) {
                    /* update pkt ptrs, this content run doesn't
                     * use this, but pcre does */
                    det_ctx->pkt_ptr = p->payload + m->offset;
                    det_ctx->pkt_off = m->offset;
                    match = 1;
                    break;
                }
            }
        }
    }

    /* If it has matched, check if it's set a "isdataat" option and process it */
    if (match == 1 && co->flags & DETECT_CONTENT_ISDATAAT_RELATIVE)
    {
        /* if the rest of the payload (from the last match) is less than
          the "isdataat" there is no data where the rule expected
          so match=0
        */

        SCLogDebug("isdataat: payload_len: %u, used %u, rest %u, isdataat? %u", p->payload_len, (m->offset + co->content_len),p->payload_len - (m->offset + co->content_len), co->isdataat);
        if(!(p->payload_len - (m->offset + co->content_len) >= co->isdataat))
            match = 0;

        if (match) {
            SCLogDebug("still matching after isdataat check");
        }
    }

    return match;
}


/*
 * returns 0: no match
 *         1: match
 *        -1: error
 */

int DetectContentMatch (ThreadVars *t, DetectEngineThreadCtx *det_ctx, Packet *p, Signature *s, SigMatch *m)
{
    uint32_t len = 0;

    if (p->payload_len == 0)
        return 0;

    DetectContentData *co = (DetectContentData *)m->ctx;

    /* see if we had a match */
    len = det_ctx->mtc.match[co->id].len;
    if (len == 0)
        return 0;

#if 0
    if (SCLogDebugEnabled()) {
        SCLogDebug("content \""); PrintRawUriFp(stdout, co->content, co->content_len);
        SCLogDebug("\" matched %" PRIu32 " time(s) at offsets: ", len);

        MpmMatch *tmpm = NULL;
        for (tmpm = det_ctx->mtc.match[co->id].top; tmpm != NULL; tmpm = tmpm->next) {
            SCLogDebug("%" PRIu32 " ", tmpm->offset);
        }
        SCLogDebug("");
    }
#endif

    return DoDetectContent(t, det_ctx, p, s, m, co);
}

DetectContentData *DetectContentParse (char *contentstr)
{
    DetectContentData *cd = NULL;
    char *str;
    uint16_t len;

    if (strlen(contentstr) == 0)
        return NULL;

    if (contentstr[0] == '\"' && contentstr[strlen(contentstr)-1] == '\"') {
        str = strdup(contentstr+1);
        str[strlen(contentstr)-2] = '\0';
    } else {
        str = strdup(contentstr);
    }

    len = strlen(str);
    if (len == 0)
        goto error;

    cd = malloc(sizeof(DetectContentData));
    if (cd == NULL) {
        SCLogDebug("DetectContentParse malloc failed");
        goto error;
    }
    memset(cd,0,sizeof(DetectContentData));

    //SCLogDebug("DetectContentParse: \"%s\", len %" PRIu32 "", str, len);
    char converted = 0;

    {
        uint16_t i, x;
        uint8_t bin = 0;
        uint8_t escape = 0;
        uint8_t binstr[3] = "";
        uint8_t binpos = 0;

        for (i = 0, x = 0; i < len; i++) {
            // SCLogDebug("str[%02u]: %c", i, str[i]);
            if (str[i] == '|') {
                if (bin) {
                    bin = 0;
                } else {
                    bin = 1;
                }
            } else if(!escape && str[i] == '\\') {
                escape = 1;
            } else {
                if (bin) {
                    if (isdigit(str[i]) ||
                            str[i] == 'A' || str[i] == 'a' ||
                            str[i] == 'B' || str[i] == 'b' ||
                            str[i] == 'C' || str[i] == 'c' ||
                            str[i] == 'D' || str[i] == 'd' ||
                            str[i] == 'E' || str[i] == 'e' ||
                            str[i] == 'F' || str[i] == 'f')
                    {
                        // SCLogDebug("part of binary: %c", str[i]);

                        binstr[binpos] = (char)str[i];
                        binpos++;

                        if (binpos == 2) {
                            uint8_t c = strtol((char *)binstr, (char **) NULL, 16) & 0xFF;
                            binpos = 0;
                            str[x] = c;
                            x++;
                            converted = 1;
                        }
                    } else if (str[i] == ' ') {
                        // SCLogDebug("space as part of binary string");
                    }
                } else if (escape) {
                    if (str[i] == ':' ||
                        str[i] == ';' ||
                        str[i] == '\\' ||
                        str[i] == '\"')
                    {
                        str[x] = str[i];
                        x++;
                    } else {
                        //SCLogDebug("Can't escape %c", str[i]);
                        goto error;
                    }
                    escape = 0;
                    converted = 1;
                } else {
                    str[x] = str[i];
                    x++;
                }
            }
        }
#if 0//def DEBUG
        if (SCLogDebugEnabled()) {
            for (i = 0; i < x; i++) {
                if (isprint(str[i])) SCLogDebug("%c", str[i]);
                else                 SCLogDebug("\\x%02u", str[i]);
            }
            SCLogDebug("");
        }
#endif

        if (converted) {
            len = x;
        }
    }

    cd->content = malloc(len);
    if (cd->content == NULL)
        goto error;

    memcpy(cd->content, str, len);
    cd->content_len = len;
    cd->depth = 0;
    cd->offset = 0;
    cd->within = 0;
    cd->distance = 0;
    cd->flags = 0;

    free(str);
    return cd;

error:
    free(str);
    if (cd != NULL) {
        if (cd->content != NULL)
            free(cd->content);
        free(cd);
    }
    return NULL;
}

/**
 * \brief Helper function to print a DetectContentData
 */
void DetectContentPrint(DetectContentData *cd)
{
    int i = 0;
    if (cd == NULL) {
        SCLogDebug("DetectContentData \"cd\" is NULL");
        return;
    }
    char *tmpstr=malloc(sizeof(char) * cd->content_len + 1);

    if (tmpstr != NULL) {
        for (i = 0; i < cd->content_len; i++)
            tmpstr[i] = cd->content[i];
        tmpstr[i] = '\0';
        SCLogDebug("Content: \"%s\"", tmpstr);
        free(tmpstr);
    } else {
        SCLogDebug("Content: ");
        for (i = 0; i < cd->content_len; i++)
            SCLogDebug("%c", cd->content[i]);
    }

    SCLogDebug("Content_id: %u ", cd->id);
    SCLogDebug("Content_len: %u ", cd->content_len);
    SCLogDebug("Depth: %u ", cd->depth);
    SCLogDebug("Offset: %u ", cd->offset);
    SCLogDebug("Within: %u ", cd->within);
    SCLogDebug("Distance: %u ", cd->distance);
    SCLogDebug("Isdataat: %u ", cd->isdataat);
    SCLogDebug("flags: %u ", cd->flags);

    /** If it's a chunk, print the data related */
    if (cd->flags & DETECT_CONTENT_IS_CHUNK) {
        SCLogDebug("* Is_Chunk: is set");
        SCLogDebug("chunk_group_id: %u ", cd->chunk_group_id);
        SCLogDebug("chunk_id: %u ", cd->chunk_id);
    } else {
        SCLogDebug("Is_Chunk: is not set");
    }
    SCLogDebug("-----------");
}

/**
 * \brief Function that return chunks of a original DetectContentData
 *        that need to be split
 * \param origcd pointer to the real DetectContentData
 * \param remaining_content_length to the real DetectContentData
 *
 * \retval NULL if something goes wrong
 * \retval DetectContentData pointer to the new chunk
 */
DetectContentData *DetectContentSplitChunk(DetectContentData *origcd,
                                           uint8_t remaining_content_len,
                                           uint8_t index, int32_t mpl)
{
    DetectContentData *cd = malloc(sizeof(DetectContentData));
    if (cd == NULL) {
        SCLogError(SC_ERR_MEM_ALLOC, "DetectContentData malloc failed");
        goto error;
    }
    memset(cd,0,sizeof(DetectContentData));

    /* Get the length for this chunk */
    if (remaining_content_len < mpl)
        cd->content_len = remaining_content_len;
    else
        cd->content_len = mpl;

    if (cd->content_len <= 0)
        goto error;

    cd->content = (uint8_t*) malloc(sizeof(uint8_t) * cd->content_len);
    if (cd->content == NULL) {
        SCLogError(SC_ERR_MEM_ALLOC, "string for content malloc failed");
        goto error;
    }

    memcpy(cd->content, origcd->content + index * sizeof(uint8_t), cd->content_len);

    return cd;

error:
    if (cd != NULL) {
        if (cd->content != NULL)
            free(cd->content);
        free(cd);
    }
    return NULL;
}

/**
 * \brief Search the next applicable DETECT_CONTENT SigMatch
          (includes the current sm)
 *
 * \param sm pointer to the current SigMatch of a parsing process
 *
 * \retval null if no applicable DetectContent was found
 * \retval pointer to the SigMatch next DETECT_CONTENT SigMatch
 */
SigMatch *DetectContentFindNextApplicableSM(SigMatch *sm)
{
    if (sm == NULL)
        return NULL;
    while ( sm != NULL && sm->type != DETECT_CONTENT)
        sm = sm->next;

    return sm;
}

/**
 * \brief Helper function to determine if there are patterns before this one,
 *        this is used before installing a new within or distance modifier
 *        because if this return NULL, it will never match!
 *
 * \param sm pointer to the current SigMatch of a parsing process
 *
 * \retval null if no applicable SigMatch pattern was found
 * \retval pointer to the SigMatch that has the previous SigMatch
 *                 of type DetectContent, (and is the first chunk if
 *                 the pattern was splitted)
 *
 * \todo: should we add here DETECT_PCRE, DETECT_URI_CONTENT, etc?
 */
SigMatch *DetectContentHasPrevSMPattern(SigMatch *sm)
{
    if (sm == NULL)
        return NULL;

    /* the current SM doesn't apply */
    sm = sm->prev;
    while (sm != NULL && sm->type != DETECT_CONTENT)
        sm = sm->prev;
    return sm;
}

/**
 * \brief Search the first DETECT_CONTENT chunk of the last group in the
 *        previous SigMatches or the first DETECT_CONTENT not chunked
 * \retval pointer to the SigMatch holding the DetectContent
 * \param sm pointer to the current SigMatch of a parsing process
 * \retval null if no applicable DetectContent was found
 * \retval pointer to the SigMatch that has the previous SigMatch
 *                 of type DetectContent, (and is the first chunk if
 *                 the pattern was splitted)
 */
SigMatch *DetectContentFindPrevApplicableSM(SigMatch *sm)
{
    if (sm == NULL)
        return NULL;
    while (sm != NULL && sm->type != DETECT_CONTENT)
        sm = sm->prev;

    if (sm == NULL)
        return NULL;

    DetectContentData *cd = (DetectContentData*) sm->ctx;
    if (cd == NULL)
        return NULL;

    /** It's not a chunk, so its the only DetectContent for this pattern */
    if (!(cd->flags & DETECT_CONTENT_IS_CHUNK))
        return sm;

    /** Else search for the first chunk in this group of chunks */
    uint8_t chunk_group_id = cd->chunk_group_id;
    while (sm != NULL && sm->type == DETECT_CONTENT)
    {
        cd = (DetectContentData*) sm->ctx;
        if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK))
            return NULL;

        /** Weird case, this means that the chunk are not consecutive
         * or not likned correctly */
        if (cd->chunk_group_id != chunk_group_id)
            return NULL;

        /** If we get the first one, return the SimMatch */
        if (cd->chunk_id == 0)
            return sm;

        sm = sm->prev;
    }
    /* We should not be here */
    return NULL;
}

/**
 * \brief Count the number of chunks of a specified chunk group
 * \param sm pointer to a SigMatch that belong to this chunk group
 * \param chunk_group_id id of the group of chunks (to ensure)
 * \retval -1 if something fail
 * \retval count of the chunks of this group
 */
int DetectContentCountChunksInGroup(SigMatch *sm, uint8_t chunk_group_id)
{
    int count = 0;
    if (sm == NULL || sm->type != DETECT_CONTENT)
        return -1;

    DetectContentData *cd = NULL;
    SigMatch *first_sm = DetectContentFindPrevApplicableSM(sm);
    for (; first_sm != NULL &&
           first_sm->type == DETECT_CONTENT &&
           first_sm->ctx != NULL &&
           (cd = (DetectContentData*) first_sm->ctx) &&
           (cd->flags & DETECT_CONTENT_IS_CHUNK) &&
           cd->chunk_group_id == chunk_group_id
         ; first_sm = first_sm->next, count++);

    return count;
}

/**
 * \brief Get the remaining legth of a splitted pattern
 *        (current content not included!)
 * \param first_sm pointer to a SigMatch that belong to this chunk group
 * \retval pointer to the SigMatch holding the DetectContent
 * \retval -1 if fail
 * \retval length if every thing was ok
 */
int DetectContentChunksGetRemainingLength(SigMatch *first_sm)
{
    int length = 0;
    if (first_sm == NULL)
        return -1;

    if (first_sm->type != DETECT_CONTENT || first_sm->ctx == NULL)
        return -1;

    DetectContentData *cd = (DetectContentData*) first_sm->ctx;
    uint8_t chunk_group_id = cd->chunk_group_id;

    /** Skip the current content (not included) */
    first_sm = first_sm->next;

    /** sum the content_len's */
    for (; first_sm != NULL &&
           first_sm->type == DETECT_CONTENT &&
           first_sm->ctx != NULL &&
           (cd = (DetectContentData*) first_sm->ctx) &&
           (cd->flags & DETECT_CONTENT_IS_CHUNK) &&
           cd->chunk_group_id == chunk_group_id
         ; first_sm = first_sm->next, length += cd->content_len);

    return length;
}


/**
 * \brief Get the previous legth of a splitted pattern (current content not included!)
 * \param first_sm pointer to a SigMatch that belong to this chunk group
 * \retval pointer to the SigMatch holding the DetectContent
 * \retval length if every thing was ok
 * \retval -1 if fail
 */
int DetectContentChunksGetPreviousLength(SigMatch *sm)
{
    int length = 0;
    if (sm == NULL)
        return -1;

    if (sm->type != DETECT_CONTENT || sm->ctx == NULL)
        return -1;

    DetectContentData *cd = (DetectContentData*) sm->ctx;
    uint8_t chunk_group_id = cd->chunk_group_id;
    uint8_t chunk_id = cd->chunk_id;

    SigMatch *first_sm = DetectContentFindPrevApplicableSM(sm);

    for (; first_sm != NULL &&
           first_sm->type == DETECT_CONTENT &&
           first_sm->ctx != NULL &&
           (cd = (DetectContentData*) first_sm->ctx) &&
           (cd->flags & DETECT_CONTENT_IS_CHUNK) &&
           cd->chunk_group_id == chunk_group_id &&
           cd->chunk_id != chunk_id
         ; first_sm = first_sm->next, length += cd->content_len);

    if (cd != NULL && cd->chunk_id == chunk_id)
        return length;

    return 0;
}

/**
 * \brief Get the total legth of a splitted pattern
 * \param first_sm pointer to a SigMatch that belong to this chunk group
 * \retval pointer to the SigMatch holding the DetectContent
 * \retval length if every thing was ok
 * \retval -1 if fail
 */
int DetectContentChunksGetTotalLength(SigMatch *sm)
{
    int length = 0;
    if (sm == NULL)
        return -1;

    if (sm->type != DETECT_CONTENT || sm->ctx == NULL)
        return -1;

    DetectContentData *cd = (DetectContentData*) sm->ctx;
    uint8_t chunk_group_id = cd->chunk_group_id;

    /** Go to the first SigMatch of this Chunk group */
    SigMatch *first_sm = DetectContentFindPrevApplicableSM(sm);

    for (; first_sm != NULL &&
           first_sm->type == DETECT_CONTENT &&
           first_sm->ctx != NULL &&
           (cd = (DetectContentData*) first_sm->ctx) &&
           (cd->flags & DETECT_CONTENT_IS_CHUNK) &&
           cd->chunk_group_id == chunk_group_id
         ; first_sm = first_sm->next, length += cd->content_len);

    return length;
}

/**
 * \brief Print list of DETECT_CONTENT SigMatch's allocated in a
 * SigMatch list, from the current sm to the end
 * \param sm pointer to the current SigMatch to start printing from
 */
void DetectContentPrintAll(SigMatch *sm)
{
    if (SCLogDebugEnabled()) {
        int i = 0;
        if (sm == NULL)
            return;

        /** Go to the first SigMatch of this Chunk group */
        SigMatch *first_sm = sm;

       /* Print all of them */
        for (; first_sm != NULL; first_sm = first_sm->next)
            if (first_sm->type == DETECT_CONTENT) {
                SCLogDebug("Printing SigMatch DETECT_CONTENT %d", ++i);
                DetectContentPrint(first_sm->ctx);
            }
    }
}

/**
 * \brief Function to update modifiers of a chunk group after setting depth
 * \param first_sm pointer to the head of this group of chunks to update
 * \retval -1 if error
 * \retval 1 if all was ok
 */
int DetectContentPropagateDepth(SigMatch *first_sm)
{
    int res = -1;
    DetectContentData *cd = first_sm->ctx;
    if (first_sm == NULL || first_sm->ctx == NULL)
        return -1;

    if (cd->chunk_flags & CHUNK_UPDATED_DEPTH)
    {
        SCLogDebug("Depth already set for this pattern!!");
        return res;
    }

    res = DetectContentPropagateModifiers(first_sm);
    if (res == 1) {
        cd->chunk_flags |= CHUNK_UPDATED_DEPTH;
    }
    return res;
}

/**
 * \brief Function to update modifiers of a chunk group after setting isdataat
 * \param first_sm pointer to the head of this group of chunks to update
 * \retval -1 if error
 * \retval 1 if all was ok
 */
int DetectContentPropagateIsdataat(SigMatch *first_sm)
{
    int res = -1;
    DetectContentData *cd = first_sm->ctx;

    if (first_sm == NULL || first_sm->ctx == NULL)
        return -1;

    if (cd->chunk_flags & CHUNK_UPDATED_ISDATAAT)
    {
        SCLogDebug("Depth already set for this pattern!!");
        return res;
    }

    res = DetectContentPropagateModifiers(first_sm);
    if (res == 1) {
        cd->chunk_flags |= CHUNK_UPDATED_ISDATAAT;
    }
    return res;
}

/**
 * \brief Function to update modifiers of a chunk group after setting within
 * \param first_sm pointer to the head of this group of chunks to update
 * \retval -1 if error
 * \retval 1 if all was ok
 */
int DetectContentPropagateWithin(SigMatch *first_sm)
{
    int res = -1;
    DetectContentData *cd = first_sm->ctx;
    if (first_sm == NULL || first_sm->ctx == NULL)
        return -1;

    if (cd->chunk_flags & CHUNK_UPDATED_WITHIN)
    {
        SCLogDebug("Depth already set for this pattern!!");
        return res;
    }

    res = DetectContentPropagateModifiers(first_sm);
    if (res == 1) {
        cd->chunk_flags |= CHUNK_UPDATED_WITHIN;
    }
    return res;
}

/**
 * \brief Function to update modifiers of a chunk group after setting distance
 * \param first_sm pointer to the head of this group of chunks to update
 * \retval -1 if error
 * \retval 1 if all was ok
 */
int DetectContentPropagateDistance(SigMatch *first_sm)
{
    int res = -1;
    DetectContentData *cd = first_sm->ctx;
    if (first_sm == NULL || first_sm->ctx == NULL)
        return -1;

    if (cd->chunk_flags & CHUNK_UPDATED_DISTANCE)
    {
        SCLogDebug("Depth already set for this pattern!!");
        return res;
    }

    res = DetectContentPropagateModifiers(first_sm);
    if (res == 1) {
        cd->chunk_flags |= CHUNK_UPDATED_DISTANCE;
    }
    return res;
}

/**
 * \brief Function to update modifiers of a chunk group after setting Offset
 * \param first_sm pointer to the head of this group of chunks to update
 * \retval -1 if error
 * \retval 1 if all was ok
 */
int DetectContentPropagateOffset(SigMatch *first_sm)
{
    int res = -1;
    DetectContentData *cd = first_sm->ctx;
    if (first_sm == NULL || first_sm->ctx == NULL)
        return -1;

    if (cd->chunk_flags & CHUNK_UPDATED_OFFSET)
    {
        SCLogDebug("Depth already set for this pattern!!");
        return res;
    }

    res = DetectContentPropagateModifiers(first_sm);
    if (res == 1) {
        cd->chunk_flags |= CHUNK_UPDATED_OFFSET;
    }
    return res;
}

/**
 * \brief Function to update modifiers of a chunk group after setting a modifier
 *   This function should not be called directly from outside detect-content.c !
 *
 * \param first_sm pointer to the head of this group of chunks to update
 * \retval -1 if error
 * \retval 1 if all was ok
 */
int DetectContentPropagateModifiers(SigMatch *first_sm)
{
    if (first_sm == NULL)
        return -1;

    /** Rewind the pointer to the start of the chunk if we have a chunk group */
    first_sm = DetectContentFindPrevApplicableSM(first_sm);

    if (first_sm->ctx == NULL)
        return -1;

    DetectContentData *first_chunk = (DetectContentData*)first_sm->ctx;
    if (first_chunk == NULL)
        return -1;

    if ( !(first_chunk->flags & DETECT_CONTENT_IS_CHUNK))
        /** No modifiers to update */
        return 1;

    uint8_t chunk_group_id = first_chunk->chunk_group_id;
    uint8_t num_chunks = DetectContentCountChunksInGroup(first_sm, chunk_group_id);
    int16_t total_len = DetectContentChunksGetTotalLength(first_sm);

    if (num_chunks < 1 || total_len < 1)
        return -1;

    DetectContentData *cur_chunk = NULL;
    DetectContentData *last_chunk = first_chunk;
    SigMatch *cur_sm = NULL;

    /** The first chunk has the real modifiers that we want to propagate */
    for (cur_sm = first_sm;
         cur_sm != NULL &&
         cur_sm->type == DETECT_CONTENT &&
         (cur_chunk = (DetectContentData*) cur_sm->ctx) != NULL &&
         cur_chunk->chunk_group_id == chunk_group_id ;
         cur_sm = cur_sm->next) {

        //SCLogDebug("Cur: %u %s Last: %u %s", cur_chunk->offset, cur_chunk->content, last_chunk->offset, last_chunk->content);

        int16_t remaining_len = DetectContentChunksGetRemainingLength(cur_sm);
        int16_t previous_len = DetectContentChunksGetRemainingLength(cur_sm);
        if (previous_len < 0 || remaining_len < 0)
            return -1;


        /** If we are in the first chunk */
        if (cur_chunk->chunk_id == 0) {
            /** Reset the first depth removing the length of the remaining chunks
            */
            SCLogDebug("CUR depth = %u remain_len %d ", cur_chunk->depth, remaining_len);

            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_DEPTH) && cur_chunk->depth > 0)
                cur_chunk->depth -= remaining_len;

            /** Reset the first within removing the length of the remaining chunks
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_WITHIN) && cur_chunk->within > 0)
                cur_chunk->within -= remaining_len;

            /** Reset the first isdataat adding the length of the remaining chunks
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_ISDATAAT) && cur_chunk->isdataat > 0)
                cur_chunk->isdataat += remaining_len;
            /**
            * The offseth for the first chunk is the real offset,
            * so no need to update it here
            * The same is applicable here to offset and distance
            */

        /** If it's not the first chunk we need to propagate the changes */
        } else {

            /** Propagate the flags */
            cur_chunk->flags = last_chunk->flags;

            /** Update the depth adding the content_len of the current chunk
            * to the previous chunk depth
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_DEPTH) && last_chunk->depth > 0)
                cur_chunk->depth = last_chunk->depth + cur_chunk->content_len;

            /** Update the offset adding the content_len of the last chunk
            * to the previous chunk offset
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_OFFSET) && last_chunk->offset > 0)
                cur_chunk->offset = last_chunk->offset + last_chunk->content_len;

            /** We are iterating in the chunks after the first one, so within is
            * relative to the previous chunks and should be exactly the size of
            * its content_len since they are consecutive
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_WITHIN)) {
                /** Even if they don't specify a within option,
                 * we set the flag, since they are relative to the chunks
                 * of the same pattern
                 */
                cur_chunk->flags |= DETECT_CONTENT_WITHIN;
                cur_chunk->within = cur_chunk->content_len;
            }

            /** We are iterating in the chunks after the first one, so distance
            * must be 0 between the chunks, since they are consecutive
            * splitted chunks
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_DISTANCE)) {
                /** Even if they don't specify a within option,
                 * we set the flag, since they are relative to the chunks
                 * of the same pattern
                 */
                cur_chunk->flags |= DETECT_CONTENT_DISTANCE;
                cur_chunk->distance = 0;
            }

            /** The isdataat (relative) is updated to the
            * last_chunk isdataat - the content_len  of the current
            * chunk content_len
            */
            if ( !(cur_chunk->chunk_flags & CHUNK_UPDATED_ISDATAAT) && last_chunk->isdataat > 0)
                cur_chunk->isdataat = last_chunk->isdataat - cur_chunk->content_len;
        }

        last_chunk = cur_chunk;
    }

    return 1;
}

/**
 * \brief Function to setup a content pattern. Patterns that doesn't fit the
 * current max_pattern_length, are splitted into multiple chunks in independent
 * DetectContentData structures with it's own modifiers. Each modifier must be
 * recalculated for each chunk from the modifiers of the head of the chunk
 * group, and will act as independent patterns
 *
 * \param de_ctx pointer to the current detection_engine
 * \param s pointer to the current Signature
 * \param m pointer to the last parsed SigMatch
 * \param contentstr pointer to the current keyword content string
 * \retval -1 if error
 * \retval 0 if all was ok
 */
int DetectContentSetup (DetectEngineCtx *de_ctx, Signature *s, SigMatch *m, char *contentstr)
{
    DetectContentData *cd = NULL;
    SigMatch *sm = NULL;
    /* max_pattern_length */
    int32_t mpltmp = -1;
    uint8_t mpl = 0;
    uint8_t index = 0;

    cd = DetectContentParse(contentstr);
    if (cd == NULL) goto error;

    mpltmp = MpmMatcherGetMaxPatternLength(de_ctx->mpm_matcher);
    if (mpltmp < 0)
    {
        SCLogDebug("Unknown Matcher type. Exiting...");
        exit(EXIT_FAILURE);
    }
    mpl = mpltmp;

    SCLogDebug("Matcher type: %"PRIu16" max_pattern_length: %"PRIu32"", de_ctx->mpm_matcher, mpl);

    /** We are going to assign a chunk group to all the DetectContents, even
      * if it's not splitted. This will give us the number of loaded patterns
      * in this signature */
    if (s != NULL) {
        s->nchunk_groups++;
    }

    /** Check if we need to split the content into chunks */
    if (mpl > 0 && cd->content_len > mpl) {
        DetectContentData *aux = NULL;
        SigMatch *first = NULL;
        uint8_t chunk_id = 0;


        /** Split it from DetectContentSplitChunk() */
        for (index = 0; index < cd->content_len; index += mpl)
        {
            aux = DetectContentSplitChunk(cd, (uint8_t)(cd->content_len - index), index, mpl);
            if ( aux == NULL) {
                SCLogDebug("Couldn't split pattern chunks. Exiting...");
                exit(EXIT_FAILURE);
            }

            aux->flags |= DETECT_CONTENT_IS_CHUNK;

            /** If we load a signature, assing the internal
              * chunk_group_id of the sig
              */
            if (s != NULL)
            {
                /** each group of chunks has it's own internal id in the sig */
                aux->chunk_group_id = s->nchunk_groups;
                /**
                  * The first chunk will have id = 0
                  * we need to search for applying the content modifiers
                  */
                aux->chunk_id = chunk_id++;
            }

            /** Allocate it as a normal SigMatch */
            sm = SigMatchAlloc();
            if (sm == NULL)
                goto error;

            sm->type = DETECT_CONTENT;
            sm->ctx = (void *)aux;
            SigMatchAppend(s,m,sm);
            m = sm;

            aux->id = de_ctx->content_max_id;
            de_ctx->content_max_id++;

            s->flags |= SIG_FLAG_MPM;

            /** We need to setup the modifiers for the chunks respect
              * the last chunk installed inmediatelly before
              * so do the propagation from the first one
              * The function DetectContentPropagate*Modifier*() should
              * be called when a new content modifier is
              * parsed/installed
              */
            if (aux->chunk_id == 0)
                first = sm;
            DetectContentPropagateModifiers(first);
            //DetectContentPrint(aux);
        }

        /** Free the original pattern */
        DetectContentFree(cd);
    /**
     * If we dont need to split it is because the matcher has no length limit
     * or the payload fit in the current max pattern length, so no chunks here
     */
    } else {

        sm = SigMatchAlloc();
        if (sm == NULL)
            goto error;

        sm->type = DETECT_CONTENT;
        sm->ctx = (void *)cd;
        SigMatchAppend(s,m,sm);

        if (s != NULL) {
            /** each group of chunks has it's own internal id in the sig,
              * if the content is not splitted we will assign a chunk group id
              * anyway, so we know the real number of detect_content
              * patterns loaded */
            cd->chunk_group_id = s->nchunk_groups;
        }

        cd->id = de_ctx->content_max_id;
        de_ctx->content_max_id++;

        s->flags |= SIG_FLAG_MPM;

        //DetectContentPrint(cd);
    }

    return 0;

error:
    if (cd != NULL) DetectContentFree(cd);
    if (sm != NULL) free(sm);
    return -1;
}

/**
 * \brief this function will free memory associated with DetectContentData
 *
 * \param cd pointer to DetectCotentData
 */
void DetectContentFree(void *ptr) {
    DetectContentData *cd = (DetectContentData *)ptr;

    if (cd == NULL)
        return;

    if (cd->content != NULL)
        free(cd->content);

    free(cd);
}

#ifdef UNITTESTS /* UNITTESTS */

/**
 * \test DetectCotentParseTest01 this is a test to make sure we can deal with escaped colons
 */
int DetectContentParseTest01 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"abc\\:def\"";
    char *teststringparsed = "abc:def";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        if (memcmp(cd->content, teststringparsed, strlen(teststringparsed)) != 0) {
            SCLogDebug("expected %s got ", teststringparsed);
            PrintRawUriFp(stdout,cd->content,cd->content_len);
            SCLogDebug(": ");
            result = 0;
            DetectContentFree(cd);
        }
    } else {
        SCLogDebug("expected %s got NULL: ", teststringparsed);
        result = 0;
    }
    return result;
}

/**
 * \test DetectCotentParseTest02 this is a test to make sure we can deal with escaped semi-colons
 */
int DetectContentParseTest02 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"abc\\;def\"";
    char *teststringparsed = "abc;def";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        if (memcmp(cd->content, teststringparsed, strlen(teststringparsed)) != 0) {
            SCLogDebug("expected %s got ", teststringparsed);
            PrintRawUriFp(stdout,cd->content,cd->content_len);
            SCLogDebug(": ");
            result = 0;
            DetectContentFree(cd);
        }
    } else {
        SCLogDebug("expected %s got NULL: ", teststringparsed);
        result = 0;
    }
    return result;
}

/**
 * \test DetectCotentParseTest03 this is a test to make sure we can deal with escaped double-quotes
 */
int DetectContentParseTest03 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"abc\\\"def\"";
    char *teststringparsed = "abc\"def";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        if (memcmp(cd->content, teststringparsed, strlen(teststringparsed)) != 0) {
            SCLogDebug("expected %s got ", teststringparsed);
            PrintRawUriFp(stdout,cd->content,cd->content_len);
            SCLogDebug(": ");
            result = 0;
            DetectContentFree(cd);
        }
    } else {
        SCLogDebug("expected %s got NULL: ", teststringparsed);
        result = 0;
    }
    return result;
}

/**
 * \test DetectCotentParseTest04 this is a test to make sure we can deal with escaped backslashes
 */
int DetectContentParseTest04 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"abc\\\\def\"";
    char *teststringparsed = "abc\\def";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        uint16_t len = (cd->content_len > strlen(teststringparsed));
        if (memcmp(cd->content, teststringparsed, len) != 0) {
            SCLogDebug("expected %s got ", teststringparsed);
            PrintRawUriFp(stdout,cd->content,cd->content_len);
            SCLogDebug(": ");
            result = 0;
            DetectContentFree(cd);
        }
    } else {
        SCLogDebug("expected %s got NULL: ", teststringparsed);
        result = 0;
    }
    return result;
}

/**
 * \test DetectCotentParseTest05 test illegal escape
 */
int DetectContentParseTest05 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"abc\\def\"";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        SCLogDebug("expected NULL got ");
        PrintRawUriFp(stdout,cd->content,cd->content_len);
        SCLogDebug(": ");
        result = 0;
        DetectContentFree(cd);
    }
    return result;
}

/**
 * \test DetectCotentParseTest06 test a binary content
 */
int DetectContentParseTest06 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"a|42|c|44|e|46|\"";
    char *teststringparsed = "abcdef";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        uint16_t len = (cd->content_len > strlen(teststringparsed));
        if (memcmp(cd->content, teststringparsed, len) != 0) {
            SCLogDebug("expected %s got ", teststringparsed);
            PrintRawUriFp(stdout,cd->content,cd->content_len);
            SCLogDebug(": ");
            result = 0;
            DetectContentFree(cd);
        }
    } else {
        SCLogDebug("expected %s got NULL: ", teststringparsed);
        result = 0;
    }
    return result;
}

/**
 * \test DetectCotentParseTest07 test an empty content
 */
int DetectContentParseTest07 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "\"\"";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        SCLogDebug("expected NULL got %p: ", cd);
        result = 0;
        DetectContentFree(cd);
    }
    return result;
}

/**
 * \test DetectCotentParseTest08 test an empty content
 */
int DetectContentParseTest08 (void) {
    int result = 1;
    DetectContentData *cd = NULL;
    char *teststring = "";

    cd = DetectContentParse(teststring);
    if (cd != NULL) {
        SCLogDebug("expected NULL got %p: ", cd);
        result = 0;
        DetectContentFree(cd);
    }
    return result;
}

/**
 * \test DetectCotentParseChunksTest01B2G test split process
 */
int DetectContentChunkTestB2G01 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    /** MPM_B2G is currently 32 bytes word, so the number of chunks
      * created should be 0, since the pattern is 32 bytes and fit in a word */
    de_ctx->mpm_matcher = MPM_B2G;
    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly"
                   "32 bytes lentgh\"; content:\"12345678901234567890123456789012\"; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK) && m->next == NULL)
        result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectCotentParseChunksTest01B3G test split process
 */
int DetectContentChunkTestB3G01 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    /** MPM_B3G is currently 32 bytes word, so the number of chunks
      * created should be 0, since the pattern is 32 bytes and fit in a word */
    de_ctx->mpm_matcher = MPM_B3G;

    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly"
                   "32 bytes lentgh\"; content:\"12345678901234567890123456789012\"; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK) && m->next == NULL)
        result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectCotentParseChunksTestB2G02 test split process
 */
int DetectContentChunkTestB2G02 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    /** MPM_B2G is currently 33 bytes word, so the number of chunks
      * created should be 2, since the pattern is 33 bytes and
      * wont fit in a word */
    de_ctx->mpm_matcher = MPM_B2G;

    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly 33 bytes length, so it should be splitted\"; content:\"123456789012345678901234567890123\"; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK && m->next != NULL && cd->content_len == 32 && cd->chunk_id == 0))
        goto end;

    m = m->next;
    if (m != NULL && m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;

    if ( cd->flags & DETECT_CONTENT_IS_CHUNK && m->next == NULL && cd->content_len == 1 && cd->chunk_id == 1)
        result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectCotentParseChunksTestB3G02 test split proccess
 */
int DetectContentChunkTestB3G02 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    /** MPM_B3G is currently 33 bytes word, so the number of chunks
      * created should be 2, since the pattern is 33 bytes and
      * wont fit in a word */
    de_ctx->mpm_matcher = MPM_B3G;

    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly 33 bytes length, so it should be splitted\"; content:\"123456789012345678901234567890123\"; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK && m->next != NULL && cd->content_len == 32 && cd->chunk_id == 0))
        goto end;

    m = m->next;
    if (m != NULL && m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;

    if ( cd->flags & DETECT_CONTENT_IS_CHUNK && m->next == NULL && cd->content_len == 1 && cd->chunk_id == 1)
        result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectCotentParseChunksTestB2G03 test split proccess
 */
int DetectContentChunkTestB2G03 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    de_ctx->mpm_matcher = MPM_B2G;

    /** content_len = 100, so 3 chunks of 32 and the last chunk length == 4 */
    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly 100 bytes length, so it should be splitted\"; content:\"1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890\"; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;

    uint8_t chunk_id = 0;
    do {
        if (m->type == DETECT_CONTENT && m->ctx != NULL)
            cd = m->ctx;
        else
            goto end;

        if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK && m->next != NULL && cd->content_len == 32 && cd->chunk_id == chunk_id++))
            goto end;

    } while ((m = m->next) && m != NULL && m->next != NULL);

    /** Now let's see if the last Chunk hast the content_len of 4 */
    if (m == NULL || m->next != NULL)
        goto end;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;
    if (cd->content_len != 4 || cd->chunk_id != chunk_id)
        goto end;
    result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectCotentParseChunksTestB3G03 test split proccess
 */
int DetectContentChunkTestB3G03 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    de_ctx->mpm_matcher = MPM_B3G;

    /** content_len = 100, so 3 chunks of 32 and the last chunk length == 4 */
    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly 100 bytes length, so it should be splitted\"; content:\"1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890\"; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;

    uint8_t chunk_id = 0;
    do {
        if (m->type == DETECT_CONTENT && m->ctx != NULL)
            cd = m->ctx;
        else
            goto end;

        if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK && m->next != NULL && cd->content_len == 32 && cd->chunk_id == chunk_id++))
            goto end;

    } while ((m = m->next) && m != NULL && m->next != NULL);

    /** Now let's see if the last Chunk hast the content_len of 4 */
    if (m == NULL || m->next != NULL)
        goto end;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;
    if (cd->content_len != 4 || cd->chunk_id != chunk_id)
        goto end;
    result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectContentChunkTestModifiers01 test modifiers propagation
 * given a signature with just one pattern
 */
int DetectContentChunkModifiersTest01 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    de_ctx->mpm_matcher = MPM_B2G;

    /** content_len = 43, so 1 chunk of length 32 and another chunk of length == 11 */
    char *sigstr = "alert tcp any any -> any any (msg:\"This content is exactly 43 bytes length, so it should be splitted\"; content:\"1234567890123456789012345678901234567890123\"; depth:50; offset:10; isdataat:10, relative; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;

    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    SCLogDebug("---DetectContentChunkModifiersTest01---");
    DetectContentPrintAll(m);

    uint8_t chunk_id = 0;

    if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK && m->next != NULL &&
        cd->content_len == 32 && cd->chunk_id == chunk_id++))
        goto end;

    /** Check modifiers for the first chunk */
    if (cd->offset != 10 || cd->depth != 39 || cd->isdataat != 21 ||
        cd->within != 0 || cd->distance != 0) {
        SCLogDebug("First Chunk has bad modifiers");
        goto end;
    }

    /** Check specified flags (offset and depth have no flags) */
    if ( !(cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE))
        goto end;

    /** Check not specified flags (should not be set
      * automatically set for the first chunk) */
    if ( (cd->flags & DETECT_CONTENT_WITHIN) ||
         (cd->flags & DETECT_CONTENT_DISTANCE))
        goto end;

    /** Now let's see if the last Chunk of this first group has
      * the content_len of 11 and the modifiers correctly set */
    m = m->next;

    if (m == NULL)
        goto end;

    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if (!(cd->flags & DETECT_CONTENT_IS_CHUNK))
        goto end;

    if (cd->content_len != 11 || cd->chunk_id != chunk_id)
        goto end;

    /** Check modifiers for the second chunk */
    if (cd->offset != 42 || cd->depth != 50 || cd->isdataat != 10 ||
        cd->within != 11 || cd->distance != 0) {
        SCLogDebug("Second Chunk has bad modifiers");
        goto end;
    }

    /** Check specified flags */
    if ( !(cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE))
        goto end;

    /** Check flags, the second chunk should have a distance and depth
      * relative to the first chunk, so flags should be automatically set */
    if ( !(cd->flags & DETECT_CONTENT_DISTANCE) ||
         !(cd->flags & DETECT_CONTENT_WITHIN))
        goto end;

    /* Great! */
    result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test DetectContentChunkTestModifiers01 test modifiers propagation
 * mixing splitted patterns with non splitted
 */
int DetectContentChunkModifiersTest02 (void) {
    int result = 0;
    DetectContentData *cd = NULL;
    Signature *s = NULL;
    SigMatch *m = NULL;

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

    de_ctx->mpm_matcher = MPM_B2G;

    /** content 1: content_len = 3, so not splitted
    * content 2: content_len = 43, so 1 chunk of length 32 and another chunk of length == 11
    * content 3: content_len = 4, so not splitted
    * content 4: content_len = 43, so 1 chunk of length 32 and another chunk of length == 11
    */
    char *sigstr = "alert tcp any any -> any any (msg:\"Lot of contents\"; content:\"GET\"; depth:3; offset:0; isdataat:43,relative ; content:\"1234567890123456789012345678901234567890123\"; distance: 1; within: 50; depth:50; offset:10; isdataat:10, relative; content:\"HTTP\"; distance:10; within:20; content:\"1234567890123456789012345678901234567890123\"; distance: 10; within: 50; depth:1000; offset:50; isdataat:20, relative; sid:1;)";

    s = de_ctx->sig_list = SigInit(de_ctx, sigstr);
    if (s == NULL)
        goto end;

    if (de_ctx->sig_list->match == NULL)
        goto end;

    m = de_ctx->sig_list->match;

    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    SCLogDebug("---DetectContentChunkModifiersTest02---");
    DetectContentPrintAll(m);
    //uint8_t num_chunks = DetectContentCountChunksInGroup(first_sm, chunk_group_id);

    /** The first DetectContent should not be splitted */
    if ( (cd->flags & DETECT_CONTENT_IS_CHUNK) || m->next == NULL ||
        cd->depth != 3 || cd->isdataat != 43 || cd->offset!= 0 ||
        cd->within != 0 || cd->distance != 0 || cd->content_len != 3)
        goto end;

    /** First detect content ok, now let's see the first group of chunks */
    m = m->next;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if ( !(cd->flags & DETECT_CONTENT_IS_CHUNK && m->next != NULL &&
        cd->content_len == 32 && cd->chunk_id == 0))
        goto end;

    /** Check modifiers for the first chunk */
    if (cd->offset != 10 || cd->depth != 39 || cd->isdataat != 21 ||
        cd->within != 39 || cd->distance != 1) {
        SCLogDebug("First Chunk has bad modifiers");
        goto end;
    }

    /** Check specified flags (offset and depth have no flags) */
    if ( !(cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE))
        goto end;

    /** Check specified flags relative to the previous DetectContent
      * are correctly set for the first chunk) */
    if ( !(cd->flags & DETECT_CONTENT_WITHIN) ||
         !(cd->flags & DETECT_CONTENT_DISTANCE))
        goto end;

    /** Now let's see if the last Chunk of this first group has
      * the content_len of 11 and the modifiers correctly set */
    m = m->next;

    if (m == NULL)
        goto end;

    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if (!(cd->flags & DETECT_CONTENT_IS_CHUNK))
        goto end;

    if (cd->content_len != 11 || cd->chunk_id != 1)
        goto end;

    /** Check modifiers for the second chunk */
    if (cd->offset != 42 || cd->depth != 50 || cd->isdataat != 10 ||
        cd->within != 11 || cd->distance != 0) {
        SCLogDebug("Second Chunk has bad modifiers");
        goto end;
    }

    /** Check specified flags */
    if ( !(cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE))
        goto end;

    /** Check flags, the second chunk should have a distance and depth
      * relative to the first chunk, so flags should be automatically set */
    if ( !(cd->flags & DETECT_CONTENT_DISTANCE) ||
         !(cd->flags & DETECT_CONTENT_WITHIN))
        goto end;

    /** The next DetectContent should not be splitted (pattern "HTTP") */
    m = m->next;

    if (m == NULL)
        goto end;

    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    /** Should not be a chunk */
    if (cd->flags & DETECT_CONTENT_IS_CHUNK)
        goto end;

    if (cd->content_len != 4)
        goto end;

    /** Check modifiers for the second chunk */
    if (cd->offset != 0 || cd->depth != 0 || cd->isdataat != 0 ||
        cd->within != 20 || cd->distance != 10) {
        SCLogDebug("Second Chunk has bad modifiers");
        goto end;
    }

    /** Check not specified flags */
    if ( cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE)
        goto end;

    /** Check specified flags */
    if ( !(cd->flags & DETECT_CONTENT_DISTANCE) ||
         !(cd->flags & DETECT_CONTENT_WITHIN))
        goto end;

    /** Ok, now the last group of chunks */
    m = m->next;
    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if ( !((cd->flags & DETECT_CONTENT_IS_CHUNK) && m->next != NULL &&
        cd->content_len == 32 && cd->chunk_id == 0 &&
        cd->chunk_group_id == 4))
        goto end;

    /** Check modifiers for the first chunk */
    if (cd->offset != 50 || cd->depth != 989 || cd->isdataat != 31 ||
        cd->within != 39 || cd->distance != 10) {
        SCLogDebug("First Chunk of last group has bad modifiers");
        goto end;
    }

    /** Check specified flags (offset and depth have no flags) */
    if ( !(cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE))
        goto end;

    /** Check specified flags relative to the previous DetectContent
      * are correctly set for the first chunk) */
    if ( !(cd->flags & DETECT_CONTENT_WITHIN) ||
         !(cd->flags & DETECT_CONTENT_DISTANCE))
        goto end;

    /** Now let's see if the last Chunk of this last group has
      * the content_len of 11 and the modifiers correctly set */
    m = m->next;

    if (m == NULL)
        goto end;

    if (m->type == DETECT_CONTENT && m->ctx != NULL)
        cd = m->ctx;
    else
        goto end;

    if (!(cd->flags & DETECT_CONTENT_IS_CHUNK))
        goto end;

    if (cd->content_len != 11 || cd->chunk_id != 1 || cd->chunk_group_id != 4)
        goto end;

    /** Check modifiers for the second chunk */
    if (cd->offset != 82 || cd->depth != 1000 || cd->isdataat != 20 ||
        cd->within != 11 || cd->distance != 0) {
        SCLogDebug("Second Chunk of last group has bad modifiers");
        goto end;
    }

    /** Check specified flags */
    if ( !(cd->flags & DETECT_CONTENT_ISDATAAT_RELATIVE))
        goto end;

    /** Check flags, the second chunk should have a distance and depth
      * relative to the first chunk, so flags should be automatically set */
    if ( !(cd->flags & DETECT_CONTENT_DISTANCE) ||
         !(cd->flags & DETECT_CONTENT_WITHIN))
        goto end;

    /** Great!!! */
    result = 1;

end:
    SigCleanSignatures(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);
    return result;
}

/**
 * \test Test packet Matches
 * \param raw_eth_pkt pointer to the ethernet packet
 * \param pktsize size of the packet
 * \param sig pointer to the signature to test
 * \param sid sid number of the signature
 * \retval return 1 if match
 * \retval return 0 if not
 */
int DetectContentChunkMatchTest(uint8_t *raw_eth_pkt, uint16_t pktsize, char *sig,
                      uint32_t sid)
{
    int result = 1;

    Packet p;
    DecodeThreadVars dtv;

    ThreadVars th_v;
    DetectEngineThreadCtx *det_ctx = NULL;

    memset(&p, 0, sizeof(Packet));
    memset(&dtv, 0, sizeof(DecodeThreadVars));
    memset(&th_v, 0, sizeof(th_v));

    FlowInitConfig(FLOW_QUIET);
    DecodeEthernet(&th_v, &dtv, &p, raw_eth_pkt, pktsize, NULL);

    DetectEngineCtx *de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL) {
        result=0;
        goto end;
    }

    de_ctx->flags |= DE_QUIET;

    de_ctx->sig_list = SigInit(de_ctx, sig);
    if (de_ctx->sig_list == NULL) {
        result = 0;
        goto end;
    }
    de_ctx->sig_list->next = NULL;

    SCLogDebug("---DetectContentChunkMatchTest---");
    DetectContentPrintAll(de_ctx->sig_list->match);

    SigGroupBuild(de_ctx);
    //PatternMatchPrepare(mpm_ctx, MPM_B2G);
    DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);

    SigMatchSignatures(&th_v, de_ctx, det_ctx, &p);
    if (PacketAlertCheck(&p, sid) != 1) {
        result = 0;
        goto end;
    }

end:
    if (de_ctx != NULL)
    {
        //PatternMatchDestroy(mpm_ctx);
        SigGroupCleanup(de_ctx);
        SigCleanSignatures(de_ctx);
        if (det_ctx != NULL)
            DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx);
        DetectEngineCtxFree(de_ctx);
    }
    FlowShutdown();

    return result;
}

/**
 * \brief Wrapper for DetectContentChunkMatchTest
 */
int DetectContentChunkMatchTestWrp(char *sig, uint32_t sid) {
    /** Real packet with the following tcp data:
     * "Hi, this is a big test to check content matches of splitted"
     * "patterns between multiple chunks!"
     * (without quotes! :) )
     */
    uint8_t raw_eth_pkt[] = {
        0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x00,
        0x00,0x00,0x00,0x00,0x08,0x00,0x45,0x00,
        0x00,0x85,0x00,0x01,0x00,0x00,0x40,0x06,
        0x7c,0x70,0x7f,0x00,0x00,0x01,0x7f,0x00,
        0x00,0x01,0x00,0x14,0x00,0x50,0x00,0x00,
        0x00,0x00,0x00,0x00,0x00,0x00,0x50,0x02,
        0x20,0x00,0xc9,0xad,0x00,0x00,0x48,0x69,
        0x2c,0x20,0x74,0x68,0x69,0x73,0x20,0x69,
        0x73,0x20,0x61,0x20,0x62,0x69,0x67,0x20,
        0x74,0x65,0x73,0x74,0x20,0x74,0x6f,0x20,
        0x63,0x68,0x65,0x63,0x6b,0x20,0x63,0x6f,
        0x6e,0x74,0x65,0x6e,0x74,0x20,0x6d,0x61,
        0x74,0x63,0x68,0x65,0x73,0x20,0x6f,0x66,
        0x20,0x73,0x70,0x6c,0x69,0x74,0x74,0x65,
        0x64,0x20,0x70,0x61,0x74,0x74,0x65,0x72,
        0x6e,0x73,0x20,0x62,0x65,0x74,0x77,0x65,
        0x65,0x6e,0x20,0x6d,0x75,0x6c,0x74,0x69,
        0x70,0x6c,0x65,0x20,0x63,0x68,0x75,0x6e,
        0x6b,0x73,0x21 }; /* end raw_eth_pkt */

    return DetectContentChunkMatchTest(raw_eth_pkt, (uint16_t)sizeof(raw_eth_pkt),
                             sig, sid);
}

/**
 * \test Check if we match a normal pattern (not splitted)
 */
int DetectContentChunkMatchTest01()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";"
                " content:\"Hi, this is a big test\"; sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

/**
 * \test Check if we match a splitted pattern
 */
int DetectContentChunkMatchTest02()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";"
                " content:\"Hi, this is a big test to check content matches of"
                " splitted patterns between multiple chunks!\"; sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

/**
 * \test Check that we don't match the signature if one of the splitted
 * chunks doesn't match the packet
 */
int DetectContentChunkMatchTest03()
{
    /** The last chunk of the content should not match */
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\";"
                " content:\"Hi, this is a big test to check content matches of"
                " splitted patterns between multiple splitted chunks!\"; sid:1;)";
    return (DetectContentChunkMatchTestWrp(sig, 1) == 0) ? 1: 0;
}

/**
 * \test Check if we match multiple content (not splitted)
 */
int DetectContentChunkMatchTest04()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\"; "
                " content:\"Hi, this is\"; depth:15 ;content:\"a big test\"; "
                " within:15; content:\"to check content matches of\"; "
                " within:30; content:\"splitted patterns\"; distance:1; "
                " within:30; depth:400;"
                " sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

/**
 * \test Check that we match packets with multiple chunks and not chunks
 * Here we should specify only contents that fit in 32 bytes
 * Each of them with their modifier values
 */
int DetectContentChunkMatchTest05()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\"; "
                " content:\"Hi, this is a big\"; depth:17; "
                " isdataat:30, relative; "
                " content:\"test\"; within: 5; distance:1; depth:22; "
                " isdataat:15, relative; offset:18; "
                " content:\"of splitted\"; within:37; distance:15; "
                " depth:60; isdataat:20,relative; offset: 48; "
                " content:\"patterns\"; within:9; distance:1; depth:69; "
                " isdataat:10, relative; offset:60; "
                " sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

/**
 * \test Check that we match packets with multiple chunks and not chunks
 * Here we should specify contents that fit and contents that must be splitted
 * Each of them with their modifier values
 */
int DetectContentChunkMatchTest06()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\"; "
                " content:\"Hi, this is a big test to check cont\"; depth:36;"
                " content:\"ent matches\"; within:11; distance:0; "
                " content:\"of splitted patterns between multiple\"; "
                " within:38; distance:1; offset:47; depth:85; "
                " content:\"chunks!\"; within: 8; distance:1; "
                " depth:94; offset: 50; "
                " sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

/**
 * \test Check if we match contents that are in the payload
 * but not in the same order as specified in the signature
 */
int DetectContentChunkMatchTest07()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\"; "
                " content:\"chunks!\"; "
                " content:\"content matches\"; offset:32; depth:47; "
                " content:\"of splitted patterns between multiple\"; "
                " content:\"Hi, this is a big\"; offset:0; depth:17; "
                " sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

/**
 * \test Check if we match contents that are in the payload
 * but not in the same order as specified in the signature
 */
int DetectContentChunkMatchTest08()
{
    char *sig = "alert tcp any any -> any any (msg:\"Nothing..\"; "
                " content:\"ent matches\"; "
                " content:\"of splitted patterns between multiple\"; "
                " within:38; distance:1; offset:47; depth:85; "
                " content:\"chunks!\"; within: 8; distance:1; "
                " depth:94; offset: 50; "
                " content:\"Hi, this is a big test to check cont\"; depth:36;"
                " sid:1;)";
    return DetectContentChunkMatchTestWrp(sig, 1);
}

#endif /* UNITTESTS */

/**
 * \brief this function registers unit tests for DetectContent
 */
void DetectContentRegisterTests(void) {
    #ifdef UNITTESTS /* UNITTESTS */
    UtRegisterTest("DetectContentParseTest01", DetectContentParseTest01, 1);
    UtRegisterTest("DetectContentParseTest02", DetectContentParseTest02, 1);
    UtRegisterTest("DetectContentParseTest03", DetectContentParseTest03, 1);
    UtRegisterTest("DetectContentParseTest04", DetectContentParseTest04, 1);
    UtRegisterTest("DetectContentParseTest05", DetectContentParseTest05, 1);
    UtRegisterTest("DetectContentParseTest06", DetectContentParseTest06, 1);
    UtRegisterTest("DetectContentParseTest07", DetectContentParseTest07, 1);
    UtRegisterTest("DetectContentParseTest08", DetectContentParseTest08, 1);
    UtRegisterTest("DetectContentChunkTestB2G01 l=32", DetectContentChunkTestB2G01, 1);
    UtRegisterTest("DetectContentChunkTestB3G01 l=32", DetectContentChunkTestB3G01, 1);
    UtRegisterTest("DetectContentChunkTestB2G02 l=33", DetectContentChunkTestB2G02, 1);
    UtRegisterTest("DetectContentChunkTestB3G02 l=33", DetectContentChunkTestB3G02, 1);
    UtRegisterTest("DetectContentChunkTestB2G03 l=100", DetectContentChunkTestB2G03, 1);
    UtRegisterTest("DetectContentChunkTestB3G03 l=100", DetectContentChunkTestB3G03, 1);
    UtRegisterTest("DetectContentChunkModifiersTest01", DetectContentChunkModifiersTest01, 1);
    UtRegisterTest("DetectContentChunkModifiersTest02", DetectContentChunkModifiersTest02, 1);
    /* The reals */
    UtRegisterTest("DetectContentChunkMatchTest01", DetectContentChunkMatchTest01, 1);
    UtRegisterTest("DetectContentChunkMatchTest02", DetectContentChunkMatchTest02, 1);
    UtRegisterTest("DetectContentChunkMatchTest03", DetectContentChunkMatchTest03, 1);
    UtRegisterTest("DetectContentChunkMatchTest04", DetectContentChunkMatchTest04, 1);
    UtRegisterTest("DetectContentChunkMatchTest05", DetectContentChunkMatchTest05, 1);
    UtRegisterTest("DetectContentChunkMatchTest06", DetectContentChunkMatchTest06, 1);
    UtRegisterTest("DetectContentChunkMatchTest07", DetectContentChunkMatchTest07, 1);
    UtRegisterTest("DetectContentChunkMatchTest08", DetectContentChunkMatchTest08, 1);
    #endif /* UNITTESTS */
}