suricata/src/detect-csum.c

/**
 * \file
 * \author Anoop Saldanha <poonaatsoc@gmail.com>
 *
 * Checksum keyword for the the detection engine.
 */

#include "suricata-common.h"
#include "debug.h"
#include "decode.h"
#include "detect.h"
#include "detect-csum.h"

#include "util-unittest.h"

/* prototypes for the "ipv4-csum" rule keyword */
int DetectIPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                        Signature *, SigMatch *);
int DetectIPV4CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectIPV4CsumFree(void *);

/* prototypes for the "tcpv4-csum" rule keyword */
int DetectTCPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                         Signature *, SigMatch *);
int DetectTCPV4CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectTCPV4CsumFree(void *);

/* prototypes for the "tcpv6-csum" rule keyword */
int DetectTCPV6CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                         Signature *, SigMatch *);
int DetectTCPV6CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectTCPV6CsumFree(void *);

/* prototypes for the "udpv4-csum" rule keyword */
int DetectUDPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                         Signature *, SigMatch *);
int DetectUDPV4CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectUDPV4CsumFree(void *);

/* prototypes for the "udpv6-csum" rule keyword */
int DetectUDPV6CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                         Signature *, SigMatch *);
int DetectUDPV6CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectUDPV6CsumFree(void *);

/* prototypes for the "icmpv4-csum" rule keyword */
int DetectICMPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                         Signature *, SigMatch *);
int DetectICMPV4CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectICMPV4CsumFree(void *);

/* prototypes for the "icmpv6-csum" rule keyword */
int DetectICMPV6CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *,
                         Signature *, SigMatch *);
int DetectICMPV6CsumSetup(DetectEngineCtx *, Signature *, SigMatch *, char *);
void DetectICMPV6CsumFree(void *);

void DetectCsumRegisterTests(void);

/**
 * \brief Registers handlers for all the checksum keywords.  The checksum
 *        keywords that are registered are ipv4-sum, tcpv4-csum, tcpv6-csum,
 *        udpv4-csum, udpv6-csum, icmpv4-csum and icmpv6-csum.
 *
 *        Each of the checksum keywords implemented here takes 2 arguments -
 *        "valid" or "invalid".  If the rule keyword in the signature is
 *        specified as "valid", the Match function would return TRUE if the
 *        checksum for that particular packet and protocol is valid.  Similarly
 *        for "invalid".
 *
 *        The Setup functions takes 4 arguments -
 *
 *        DetectEngineCtx * (de_ctx) - A pointer to the detection engine context
 *        Signature *(s) - Pointer to signature for the current Signature being
 *                         parsed from the rules
 *        SigMatch * (m) - Pointer to the head of the SigMatchs added to the
 *                         current Signature being parsed
 *        char * (csum_str) - Pointer to a string holding the keyword value
 *
 *        The Setup function returns 0 if it successfully parses the keyword
 *        value, and -1 otherwise.
 *
 *        The Match function takes 5 arguments -
 *
 *        ThreadVars * (t) - Pointer to the tv for the detection module instance
 *        DetectEngineThreadCtx * (det_ctx) - Pointer to the detection engine
 *                                            thread context
 *        Packet * (p) - Pointer to the Packet currently being handled
 *        Signature * (s) - Pointer to the Signature, the packet is being
 *                          currently matched with
 *        SigMatch * (m) - Pointer to the keyword structure from the above
 *                         Signature, the Packet is being currently matched
 *                         with
 *
 *        The Match function returns 1 if the Packet contents match the keyword,
 *        and 0 otherwise
 *
 *        The Free function takes a single argument -
 *
 *        void * (ptr) - Pointer to the DetectCsumData for a keyword
 */
void DetectCsumRegister (void)
{
    sigmatch_table[DETECT_IPV4_CSUM].name = "ipv4-csum";
    sigmatch_table[DETECT_IPV4_CSUM].Match = DetectIPV4CsumMatch;
    sigmatch_table[DETECT_IPV4_CSUM].Setup = DetectIPV4CsumSetup;
    sigmatch_table[DETECT_IPV4_CSUM].Free  = DetectIPV4CsumFree;
    sigmatch_table[DETECT_IPV4_CSUM].RegisterTests = DetectCsumRegisterTests;

    sigmatch_table[DETECT_TCPV4_CSUM].name = "tcpv4-csum";
    sigmatch_table[DETECT_TCPV4_CSUM].Match = DetectTCPV4CsumMatch;
    sigmatch_table[DETECT_TCPV4_CSUM].Setup = DetectTCPV4CsumSetup;
    sigmatch_table[DETECT_TCPV4_CSUM].Free  = DetectTCPV4CsumFree;
    sigmatch_table[DETECT_TCPV4_CSUM].RegisterTests = NULL;

    sigmatch_table[DETECT_TCPV6_CSUM].name = "tcpv6-csum";
    sigmatch_table[DETECT_TCPV6_CSUM].Match = DetectTCPV6CsumMatch;
    sigmatch_table[DETECT_TCPV6_CSUM].Setup = DetectTCPV6CsumSetup;
    sigmatch_table[DETECT_TCPV6_CSUM].Free  = DetectTCPV6CsumFree;
    sigmatch_table[DETECT_TCPV6_CSUM].RegisterTests = NULL;

    sigmatch_table[DETECT_UDPV4_CSUM].name = "udpv4-csum";
    sigmatch_table[DETECT_UDPV4_CSUM].Match = DetectUDPV4CsumMatch;
    sigmatch_table[DETECT_UDPV4_CSUM].Setup = DetectUDPV4CsumSetup;
    sigmatch_table[DETECT_UDPV4_CSUM].Free  = DetectUDPV4CsumFree;
    sigmatch_table[DETECT_UDPV4_CSUM].RegisterTests = NULL;

    sigmatch_table[DETECT_UDPV6_CSUM].name = "udpv6-csum";
    sigmatch_table[DETECT_UDPV6_CSUM].Match = DetectUDPV6CsumMatch;
    sigmatch_table[DETECT_UDPV6_CSUM].Setup = DetectUDPV6CsumSetup;
    sigmatch_table[DETECT_UDPV6_CSUM].Free  = DetectUDPV6CsumFree;
    sigmatch_table[DETECT_UDPV6_CSUM].RegisterTests = NULL;

    sigmatch_table[DETECT_ICMPV4_CSUM].name = "icmpv4-csum";
    sigmatch_table[DETECT_ICMPV4_CSUM].Match = DetectICMPV4CsumMatch;
    sigmatch_table[DETECT_ICMPV4_CSUM].Setup = DetectICMPV4CsumSetup;
    sigmatch_table[DETECT_ICMPV4_CSUM].Free  = DetectICMPV4CsumFree;
    sigmatch_table[DETECT_ICMPV4_CSUM].RegisterTests = NULL;

    sigmatch_table[DETECT_ICMPV6_CSUM].name = "icmpv6-csum";
    sigmatch_table[DETECT_ICMPV6_CSUM].Match = DetectICMPV6CsumMatch;
    sigmatch_table[DETECT_ICMPV6_CSUM].Setup = DetectICMPV6CsumSetup;
    sigmatch_table[DETECT_ICMPV6_CSUM].Free  = DetectICMPV6CsumFree;
    sigmatch_table[DETECT_ICMPV6_CSUM].RegisterTests = NULL;

    return;
}

/**
 * \brief Validates and parses the argument supplied with the checksum keyword.
 *        Accepts strings both with and without quotes, i.e. valid, \"valid\",
 *        invalid and \"invalid\"
 *
 * \param key Pointer to a const character string holding the csum keyword value
 * \param cd  Pointer to the DetectCsumData structure that holds the keyword
 *            value sent as argument
 *
 * \retval 1 if the keyvalue has been parsed successfully, and 0 otherwise
 */
static int DetectCsumParseArg(const char *key, DetectCsumData *cd)
{
    char *str;

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

    if (strcasecmp(str, DETECT_CSUM_VALID) == 0 ||
        strcasecmp(str, DETECT_CSUM_INVALID) == 0) {
        cd->valid = (strcasecmp(key, DETECT_CSUM_VALID) == 0);
        free(str);
        return 1;
    }

    free(str);
    return 0;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        ipv4 checksum, based on whether ipv4-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectIPV4CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                        Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip4h == NULL)
        return 1;

    if (p->ip4c.comp_csum == -1)
        p->ip4c.comp_csum = IPV4CalculateChecksum((uint16_t *)p->ip4h,
                                                  IPV4_GET_RAW_HLEN(p->ip4h));

    if (p->ip4c.comp_csum == p->ip4h->ip_csum && cd->valid == 1)
        return 1;
    else if (p->ip4c.comp_csum != p->ip4h->ip_csum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the ipv4-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectIPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                        char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_IPV4_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectIPV4CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectIPV4CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        tcpv4 checksum, based on whether tcpv4-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectTCPV4CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                         Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip4h == NULL || p->proto != IPPROTO_TCP)
        return 1;

    if (p->tcpc.comp_csum == -1)
        p->tcpc.comp_csum = TCPCalculateChecksum((uint16_t *)&(p->ip4h->ip_src),
                                                 (uint16_t *)p->tcph,
                                                 (p->payload_len +
                                                  p->tcpvars.hlen) );

    if (p->tcpc.comp_csum == p->tcph->th_sum && cd->valid == 1)
        return 1;
    else if (p->tcpc.comp_csum != p->tcph->th_sum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the tcpv4-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectTCPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                         char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_TCPV4_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectTCPV4CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectTCPV4CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        tcpv6 checksum, based on whether tcpv6-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectTCPV6CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                         Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip6h == NULL || p->proto != IPPROTO_TCP)
        return 1;

    if (p->tcpc.comp_csum == -1)
        p->tcpc.comp_csum = TCPV6CalculateChecksum((uint16_t *)&(p->ip6h->ip6_src),
                                                   (uint16_t *)p->tcph,
                                                   (p->payload_len +
                                                    p->tcpvars.hlen) );

    if (p->tcpc.comp_csum == p->tcph->th_sum && cd->valid == 1)
        return 1;
    else if (p->tcpc.comp_csum != p->tcph->th_sum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the tcpv6-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectTCPV6CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                         char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_TCPV6_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectTCPV6CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectTCPV6CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        udpv4 checksum, based on whether udpv4-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectUDPV4CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                         Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip4h == NULL || p->proto != IPPROTO_UDP)
        return 1;

    if (p->udpc.comp_csum == -1)
        p->udpc.comp_csum = UDPV4CalculateChecksum((uint16_t *)&(p->ip4h->ip_src),
                                                   (uint16_t *)p->udph,
                                                   (p->payload_len +
                                                    p->udpvars.hlen) );

    if (p->udpc.comp_csum == p->udph->uh_sum && cd->valid == 1)
        return 1;
    else if (p->udpc.comp_csum != p->udph->uh_sum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the udpv4-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectUDPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                         char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_UDPV4_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectUDPV4CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectUDPV4CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        udpv6 checksum, based on whether udpv6-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectUDPV6CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                         Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip6h == NULL || p->proto != IPPROTO_UDP)
        return 1;

    if (p->udpc.comp_csum == -1)
        p->udpc.comp_csum = UDPV6CalculateChecksum((uint16_t *)&(p->ip6h->ip6_src),
                                                   (uint16_t *)p->udph,
                                                   (p->payload_len +
                                                    p->udpvars.hlen) );

    if (p->udpc.comp_csum == p->udph->uh_sum && cd->valid == 1)
        return 1;
    else if (p->udpc.comp_csum != p->udph->uh_sum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the udpv6-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectUDPV6CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                         char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_UDPV6_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectUDPV6CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectUDPV6CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        icmpv4 checksum, based on whether icmpv4-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectICMPV4CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                          Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip4h == NULL || p->proto != IPPROTO_ICMP)
        return 1;

    if (p->icmpv4c.comp_csum == -1)
        p->icmpv4c.comp_csum = ICMPV4CalculateChecksum((uint16_t *)p->icmpv4h,
                                                       ntohs(IPV4_GET_RAW_IPLEN(p->ip4h)) -
                                                       IPV4_GET_RAW_HLEN(p->ip4h) * 4);

    if (p->icmpv4c.comp_csum == p->icmpv4h->checksum && cd->valid == 1)
        return 1;
    else if (p->icmpv4c.comp_csum != p->icmpv4h->checksum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the icmpv4-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectICMPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                         char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_ICMPV4_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectICMPV4CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectICMPV4CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/**
 * \brief Checks if the packet sent as the argument, has a valid or invalid
 *        icmpv6 checksum, based on whether icmpv6-csum option for this rule
 *        has been supplied with "valid" or "invalid" argument
 *
 * \param t       Pointer to the tv for this detection module instance
 * \param det_ctx Pointer to the detection engine thread context
 * \param p       Pointer to the Packet currently being matched
 * \param s       Pointer to the Signature, the packet is being currently
 *                matched with
 * \param m       Pointer to the keyword_structure(SigMatch) from the above
 *                Signature, the Packet is being currently matched with
 *
 * \retval 1 if the Packet contents match the keyword option; 0 otherwise
 */
int DetectICMPV6CsumMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx,
                          Packet *p, Signature *s, SigMatch *m)
{
    DetectCsumData *cd = (DetectCsumData *)m->ctx;

    if (p->ip6h == NULL || p->proto != IPPROTO_ICMPV6)
        return 1;

    if (p->icmpv6c.comp_csum == -1)
        p->icmpv6c.comp_csum = ICMPV6CalculateChecksum((uint16_t *)&(p->ip6h->ip6_src),
                                                       (uint16_t *)p->icmpv6h,
                                                       IPV6_GET_PLEN(p));

    if (p->icmpv6c.comp_csum == p->icmpv6h->csum && cd->valid == 1)
        return 1;
    else if (p->icmpv6c.comp_csum != p->icmpv6h->csum && cd->valid == 0)
        return 1;
    else
        return 0;
}

/**
 * \brief Creates a SigMatch for the icmpv6-csum keyword being sent as argument,
 *        and appends it to the Signature(s).  Accepts 2 values for the
 *        keyword - "valid" and "invalid", both with and without quotes
 *
 * \param de_ctx    Pointer to the detection engine context
 * \param s         Pointer to signature for the current Signature being parsed
 *                  from the rules
 * \param m         Pointer to the head of the SigMatchs for the current rule
 *                  being parsed
 * \param csum_str  Pointer to the string holding the keyword value
 *
 * \retval 0 on success, -1 on failure
 */
int DetectICMPV6CsumSetup(DetectEngineCtx *de_ctx, Signature *s, SigMatch *m,
                         char *csum_str)
{
    DetectCsumData *cd = NULL;
    SigMatch *sm = NULL;

    //printf("DetectCsumSetup: \'%s\'\n", csum_str);

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

    sm->type = DETECT_ICMPV6_CSUM;

    if ( (cd = malloc(sizeof(DetectCsumData))) == NULL) {
        printf("Error allocating memory\n");
        exit(0);
    }
    memset(cd, 0, sizeof(DetectCsumData));

    if (DetectCsumParseArg(csum_str, cd) == 0)
        goto error;

    sm->ctx = (void *)cd;

    SigMatchAppend(s, m, sm);

    return 0;

error:
    if (cd != NULL) DetectICMPV6CsumFree(cd);
    if (sm != NULL) free(sm);

    return -1;
}

void DetectICMPV6CsumFree(void *ptr)
{
    DetectCsumData *cd = (DetectCsumData *)ptr;

    if (cd != NULL)
        free(cd);

    return;
}

/* ---------------------------------- Unit Tests --------------------------- */

#ifdef UNITTESTS

int DetectCsumIPV4ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectIPV4CsumSetup(NULL, &s, NULL, "\"valid\"") == 0);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "\"invalid\"") == 0);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "\"vaLid\"") == 0);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "\"VALID\"") == 0);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "\"iNvaLid\"") == 0);

    while (s.match != NULL) {
        DetectIPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumIPV4InValidArgsTestParse02(void)
{
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectIPV4CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectIPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumIPV4ValidArgsTestParse03(void)
{
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectIPV4CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectIPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectIPV4CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectIPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumICMPV4ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectICMPV4CsumSetup(NULL, &s, NULL, "valid") == 0);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "invalid") == 0);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "vaLid") == 0);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "VALID") == 0);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "iNvaLid") == 0);

    while (s.match != NULL) {
        DetectICMPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumICMPV4InValidArgsTestParse02(void) {
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectICMPV4CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectICMPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumICMPV4ValidArgsTestParse03(void) {
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectICMPV4CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectICMPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectICMPV4CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectICMPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumTCPV4ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectTCPV4CsumSetup(NULL, &s, NULL, "valid") == 0);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "invalid") == 0);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "vaLid") == 0);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "VALID") == 0);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "iNvaLid") == 0);

    while (s.match != NULL) {
        DetectTCPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumTCPV4InValidArgsTestParse02(void) {
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectTCPV4CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectTCPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumTCPV4ValidArgsTestParse03(void) {
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectTCPV4CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectTCPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectTCPV4CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectTCPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumUDPV4ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectUDPV4CsumSetup(NULL, &s, NULL, "valid") == 0);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "invalid") == 0);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "vaLid") == 0);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "VALID") == 0);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "iNvaLid") == 0);

    while (s.match != NULL) {
        DetectUDPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumUDPV4InValidArgsTestParse02(void) {
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectUDPV4CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectUDPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumUDPV4ValidArgsTestParse03(void) {
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectUDPV4CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectUDPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectUDPV4CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectUDPV4CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumTCPV6ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectTCPV6CsumSetup(NULL, &s, NULL, "valid") == 0);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "invalid") == 0);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "vaLid") == 0);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "VALID") == 0);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "iNvaLid") == 0);

    while (s.match != NULL) {
        DetectTCPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumTCPV6InValidArgsTestParse02(void) {
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectTCPV6CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectTCPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumTCPV6ValidArgsTestParse03(void) {
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectTCPV6CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectTCPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectTCPV6CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectTCPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumUDPV6ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectUDPV6CsumSetup(NULL, &s, NULL, "valid") == 0);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "invalid") == 0);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "vaLid") == 0);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "VALID") == 0);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "iNvaLid") == 0);

    while (s.match != NULL) {
        DetectUDPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumUDPV6InValidArgsTestParse02(void) {
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectUDPV6CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectUDPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumUDPV6ValidArgsTestParse03(void) {
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectUDPV6CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectUDPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectUDPV6CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectUDPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumICMPV6ValidArgsTestParse01(void)
{
    Signature s;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectICMPV6CsumSetup(NULL, &s, NULL, "valid") == 0);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "invalid") == 0);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "vaLid") == 0);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "VALID") == 0);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "iNvaLid") == 0);

    while (s.match != NULL) {
        DetectICMPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumICMPV6InValidArgsTestParse02(void) {
    Signature s;
    int result = -1;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectICMPV6CsumSetup(NULL, &s, NULL, "vaid") == -1);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "invaalid") == -1);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "vaLiid") == -1);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "VALieD") == -1);
    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "iNvamid") == -1);

    while (s.match != NULL) {
        DetectICMPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

int DetectCsumICMPV6ValidArgsTestParse03(void) {
    Signature s;
    DetectCsumData *cd = NULL;
    int result = 0;
    SigMatch *temp = NULL;

    memset(&s, 0, sizeof(Signature));

    result = (DetectICMPV6CsumSetup(NULL, &s, NULL, "valid") == 0);

    while (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 1);
        }
        DetectICMPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }
    s.match = NULL;

    result &= (DetectICMPV6CsumSetup(NULL, &s, NULL, "INVALID") == 0);

    if (s.match != NULL) {
        if (s.match->ctx != NULL) {
            cd = (DetectCsumData *)s.match->ctx;
            result &= (cd->valid == 0);
        }
        DetectICMPV6CsumFree(s.match->ctx);
        temp = s.match;
        s.match = s.match->next;
        free(temp);
    }

    return result;
}

#endif /* UNITTESTS */

void DetectCsumRegisterTests(void)
{

#ifdef UNITTESTS

    UtRegisterTest("DetectCsumIPV4ValidArgsTestParse01",
                   DetectCsumIPV4ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumIPV4InValidArgsTestParse02",
                   DetectCsumIPV4InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumIPV4ValidArgsTestParse03",
                   DetectCsumIPV4ValidArgsTestParse03, 1);

    UtRegisterTest("DetectCsumICMPV4ValidArgsTestParse01",
                   DetectCsumICMPV4ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumICMPV4InValidArgsTestParse02",
                   DetectCsumICMPV4InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumICMPV4ValidArgsTestParse03",
                   DetectCsumICMPV4ValidArgsTestParse03, 1);

    UtRegisterTest("DetectCsumTCPV4ValidArgsTestParse01",
                   DetectCsumTCPV4ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumTCPV4InValidArgsTestParse02",
                   DetectCsumTCPV4InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumTCPV4ValidArgsTestParse03",
                   DetectCsumTCPV4ValidArgsTestParse03, 1);

    UtRegisterTest("DetectCsumUDPV4ValidArgsTestParse01",
                   DetectCsumUDPV4ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumUDPV4InValidArgsTestParse02",
                   DetectCsumUDPV4InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumUDPV4ValidArgsTestParse03",
                   DetectCsumUDPV4ValidArgsTestParse03, 1);

    UtRegisterTest("DetectCsumUDPV6ValidArgsTestParse01",
                   DetectCsumUDPV6ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumUDPV6InValidArgsTestParse02",
                   DetectCsumUDPV6InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumUDPV6ValidArgsTestParse03",
                   DetectCsumUDPV6ValidArgsTestParse03, 1);

    UtRegisterTest("DetectCsumTCPV6ValidArgsTestParse01",
                   DetectCsumTCPV6ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumTCPV6InValidArgsTestParse02",
                   DetectCsumTCPV6InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumTCPV6ValidArgsTestParse03",
                   DetectCsumTCPV6ValidArgsTestParse03, 1);

    UtRegisterTest("DetectCsumICMPV6ValidArgsTestParse01",
                   DetectCsumICMPV6ValidArgsTestParse01, 1);
    UtRegisterTest("DetectCsumICMPV6InValidArgsTestParse02",
                   DetectCsumICMPV6InValidArgsTestParse02, 1);
    UtRegisterTest("DetectCsumICMPV6ValidArgsTestParse03",
                   DetectCsumICMPV6ValidArgsTestParse03, 1);

#endif /* UNITTESTS */

}