diff options
Diffstat (limited to 'framework/src/suricata/src/detect-csum.c')
| -rw-r--r-- | framework/src/suricata/src/detect-csum.c | 1647 |
1 files changed, 1647 insertions, 0 deletions
diff --git a/framework/src/suricata/src/detect-csum.c b/framework/src/suricata/src/detect-csum.c new file mode 100644 index 00000000..2cf5b4ce --- /dev/null +++ b/framework/src/suricata/src/detect-csum.c @@ -0,0 +1,1647 @@ +/* Copyright (C) 2007-2013 Open Information Security Foundation + * + * You can copy, redistribute or modify this Program under the terms of + * the GNU General Public License version 2 as published by the Free + * Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +/** + * \file + * + * \author Anoop Saldanha <anoopsaldanha@gmail.com> + * + * Implements checksum keyword. + */ + +#include "suricata-common.h" +#include "debug.h" +#include "decode.h" + +#include "detect.h" +#include "detect-parse.h" + +#include "detect-csum.h" + +#include "util-unittest.h" +#include "util-debug.h" + +#include "pkt-var.h" +#include "host.h" +#include "util-profiling.h" + +/* prototypes for the "ipv4-csum" rule keyword */ +int DetectIPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectIPV4CsumSetup(DetectEngineCtx *, Signature *, char *); +void DetectIPV4CsumFree(void *); + +/* prototypes for the "tcpv4-csum" rule keyword */ +int DetectTCPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectTCPV4CsumSetup(DetectEngineCtx *, Signature *, char *); +void DetectTCPV4CsumFree(void *); + +/* prototypes for the "tcpv6-csum" rule keyword */ +int DetectTCPV6CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectTCPV6CsumSetup(DetectEngineCtx *, Signature *, char *); +void DetectTCPV6CsumFree(void *); + +/* prototypes for the "udpv4-csum" rule keyword */ +int DetectUDPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectUDPV4CsumSetup(DetectEngineCtx *, Signature *, char *); +void DetectUDPV4CsumFree(void *); + +/* prototypes for the "udpv6-csum" rule keyword */ +int DetectUDPV6CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectUDPV6CsumSetup(DetectEngineCtx *, Signature *, char *); +void DetectUDPV6CsumFree(void *); + +/* prototypes for the "icmpv4-csum" rule keyword */ +int DetectICMPV4CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectICMPV4CsumSetup(DetectEngineCtx *, Signature *, char *); +void DetectICMPV4CsumFree(void *); + +/* prototypes for the "icmpv6-csum" rule keyword */ +int DetectICMPV6CsumMatch(ThreadVars *, DetectEngineThreadCtx *, Packet *, + Signature *, const SigMatchCtx *); +static int DetectICMPV6CsumSetup(DetectEngineCtx *, Signature *, 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 + * SigMatchCtx * (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 + * SigMatchCtx * (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 the keyvalue has been parsed successfully + * \retval 0 error + */ +static int DetectCsumParseArg(const char *key, DetectCsumData *cd) +{ + char *str; + + if (key[0] == '\"' && key[strlen(key) - 1] == '\"') { + str = SCStrdup(key + 1); + if (unlikely(str == NULL)) { + goto error; + } + str[strlen(key) - 2] = '\0'; + } else { + str = SCStrdup(key); + if (unlikely(str == NULL)) { + goto error; + } + } + + if (strcasecmp(str, DETECT_CSUM_VALID) == 0 || + strcasecmp(str, DETECT_CSUM_INVALID) == 0) { + cd->valid = (strcasecmp(key, DETECT_CSUM_VALID) == 0); + SCFree(str); + return 1; + } + +error: + if (str != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip4h == NULL || PKT_IS_PSEUDOPKT(p)) + return 0; + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level3_comp_csum == -1) + p->level3_comp_csum = IPV4CalculateChecksum((uint16_t *)p->ip4h, + IPV4_GET_HLEN(p)); + + if (p->level3_comp_csum == p->ip4h->ip_csum && cd->valid == 1) + return 1; + else if (p->level3_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectIPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, 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 = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (SigMatchCtx *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectIPV4CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectIPV4CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip4h == NULL || p->tcph == NULL || p->proto != IPPROTO_TCP || PKT_IS_PSEUDOPKT(p)) + return 0; + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level4_comp_csum == -1) + p->level4_comp_csum = TCPCalculateChecksum(p->ip4h->s_ip_addrs, + (uint16_t *)p->tcph, + (p->payload_len + TCP_GET_HLEN(p))); + + if (p->level4_comp_csum == p->tcph->th_sum && cd->valid == 1) + return 1; + else if (p->level4_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectTCPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, 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 = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (SigMatchCtx *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectTCPV4CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectTCPV4CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip6h == NULL || p->tcph == NULL || p->proto != IPPROTO_TCP || PKT_IS_PSEUDOPKT(p)) + return 0; + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level4_comp_csum == -1) + p->level4_comp_csum = TCPV6CalculateChecksum(p->ip6h->s_ip6_addrs, + (uint16_t *)p->tcph, + (p->payload_len + TCP_GET_HLEN(p))); + + if (p->level4_comp_csum == p->tcph->th_sum && cd->valid == 1) + return 1; + else if (p->level4_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectTCPV6CsumSetup(DetectEngineCtx *de_ctx, Signature *s, 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 = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (SigMatchCtx *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectTCPV6CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectTCPV6CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip4h == NULL || p->udph == NULL || p->proto != IPPROTO_UDP || PKT_IS_PSEUDOPKT(p) || p->udph->uh_sum == 0) + return 0; + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level4_comp_csum == -1) + p->level4_comp_csum = UDPV4CalculateChecksum(p->ip4h->s_ip_addrs, + (uint16_t *)p->udph, + (p->payload_len + + UDP_HEADER_LEN) ); + + if (p->level4_comp_csum == p->udph->uh_sum && cd->valid == 1) + return 1; + else if (p->level4_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectUDPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, 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 = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (SigMatchCtx *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectUDPV4CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectUDPV4CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip6h == NULL || p->udph == NULL || p->proto != IPPROTO_UDP || PKT_IS_PSEUDOPKT(p)) + return 0; + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level4_comp_csum == -1) + p->level4_comp_csum = UDPV6CalculateChecksum(p->ip6h->s_ip6_addrs, + (uint16_t *)p->udph, + (p->payload_len + + UDP_HEADER_LEN) ); + + if (p->level4_comp_csum == p->udph->uh_sum && cd->valid == 1) + return 1; + else if (p->level4_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectUDPV6CsumSetup(DetectEngineCtx *de_ctx, Signature *s, 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 = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (void *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectUDPV6CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectUDPV6CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip4h == NULL || p->icmpv4h == NULL || p->proto != IPPROTO_ICMP || PKT_IS_PSEUDOPKT(p)) + return 0; + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level4_comp_csum == -1) + p->level4_comp_csum = ICMPV4CalculateChecksum((uint16_t *)p->icmpv4h, + ntohs(IPV4_GET_RAW_IPLEN(p->ip4h)) - + IPV4_GET_RAW_HLEN(p->ip4h) * 4); + + if (p->level4_comp_csum == p->icmpv4h->checksum && cd->valid == 1) + return 1; + else if (p->level4_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectICMPV4CsumSetup(DetectEngineCtx *de_ctx, Signature *s, 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 = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (SigMatchCtx *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectICMPV4CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectICMPV4CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, const SigMatchCtx *ctx) +{ + const DetectCsumData *cd = (const DetectCsumData *)ctx; + + if (p->ip6h == NULL || p->icmpv6h == NULL || p->proto != IPPROTO_ICMPV6 || PKT_IS_PSEUDOPKT(p) || + (GET_PKT_LEN(p) - ((uint8_t *)p->icmpv6h - GET_PKT_DATA(p))) <= 0) { + return 0; + } + + if (p->flags & PKT_IGNORE_CHECKSUM) { + return cd->valid; + } + + if (p->level4_comp_csum == -1) + p->level4_comp_csum = ICMPV6CalculateChecksum(p->ip6h->s_ip6_addrs, + (uint16_t *)p->icmpv6h, + GET_PKT_LEN(p) - ((uint8_t *)p->icmpv6h - GET_PKT_DATA(p))); + + if (p->level4_comp_csum == p->icmpv6h->csum && cd->valid == 1) + return 1; + else if (p->level4_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 csum_str Pointer to the string holding the keyword value + * + * \retval 0 on success, -1 on failure + */ +static int DetectICMPV6CsumSetup(DetectEngineCtx *de_ctx, Signature *s, char *csum_str) +{ + DetectCsumData *cd = NULL; + SigMatch *sm = NULL; + + sm = SigMatchAlloc(); + if (sm == NULL) + goto error; + + sm->type = DETECT_ICMPV6_CSUM; + + if ( (cd = SCMalloc(sizeof(DetectCsumData))) == NULL) + goto error; + memset(cd, 0, sizeof(DetectCsumData)); + + if (DetectCsumParseArg(csum_str, cd) == 0) + goto error; + + sm->ctx = (SigMatchCtx *)cd; + + SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_MATCH); + + return 0; + +error: + if (cd != NULL) DetectICMPV6CsumFree(cd); + if (sm != NULL) SCFree(sm); + + return -1; +} + +void DetectICMPV6CsumFree(void *ptr) +{ + DetectCsumData *cd = (DetectCsumData *)ptr; + + if (cd != NULL) + SCFree(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, "\"valid\"") == 0); + result &= (DetectIPV4CsumSetup(NULL, &s, "\"invalid\"") == 0); + result &= (DetectIPV4CsumSetup(NULL, &s, "\"vaLid\"") == 0); + result &= (DetectIPV4CsumSetup(NULL, &s, "\"VALID\"") == 0); + result &= (DetectIPV4CsumSetup(NULL, &s, "\"iNvaLid\"") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectIPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumIPV4InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectIPV4CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectIPV4CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectIPV4CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectIPV4CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectIPV4CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectIPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectIPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectIPV4CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectIPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumICMPV4ValidArgsTestParse01(void) +{ + Signature s; + int result = 0; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectICMPV4CsumSetup(NULL, &s, "valid") == 0); + result &= (DetectICMPV4CsumSetup(NULL, &s, "invalid") == 0); + result &= (DetectICMPV4CsumSetup(NULL, &s, "vaLid") == 0); + result &= (DetectICMPV4CsumSetup(NULL, &s, "VALID") == 0); + result &= (DetectICMPV4CsumSetup(NULL, &s, "iNvaLid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectICMPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumICMPV4InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectICMPV4CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectICMPV4CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectICMPV4CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectICMPV4CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectICMPV4CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectICMPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectICMPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectICMPV4CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectICMPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumTCPV4ValidArgsTestParse01(void) +{ + Signature s; + int result = 0; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectTCPV4CsumSetup(NULL, &s, "valid") == 0); + result &= (DetectTCPV4CsumSetup(NULL, &s, "invalid") == 0); + result &= (DetectTCPV4CsumSetup(NULL, &s, "vaLid") == 0); + result &= (DetectTCPV4CsumSetup(NULL, &s, "VALID") == 0); + result &= (DetectTCPV4CsumSetup(NULL, &s, "iNvaLid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectTCPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumTCPV4InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectTCPV4CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectTCPV4CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectTCPV4CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectTCPV4CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectTCPV4CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectTCPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectTCPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectTCPV4CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectTCPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumUDPV4ValidArgsTestParse01(void) +{ + Signature s; + int result = 0; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectUDPV4CsumSetup(NULL, &s, "valid") == 0); + result &= (DetectUDPV4CsumSetup(NULL, &s, "invalid") == 0); + result &= (DetectUDPV4CsumSetup(NULL, &s, "vaLid") == 0); + result &= (DetectUDPV4CsumSetup(NULL, &s, "VALID") == 0); + result &= (DetectUDPV4CsumSetup(NULL, &s, "iNvaLid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectUDPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumUDPV4InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectUDPV4CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectUDPV4CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectUDPV4CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectUDPV4CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectUDPV4CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectUDPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectUDPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectUDPV4CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectUDPV4CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumTCPV6ValidArgsTestParse01(void) +{ + Signature s; + int result = 0; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectTCPV6CsumSetup(NULL, &s, "valid") == 0); + result &= (DetectTCPV6CsumSetup(NULL, &s, "invalid") == 0); + result &= (DetectTCPV6CsumSetup(NULL, &s, "vaLid") == 0); + result &= (DetectTCPV6CsumSetup(NULL, &s, "VALID") == 0); + result &= (DetectTCPV6CsumSetup(NULL, &s, "iNvaLid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectTCPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumTCPV6InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectTCPV6CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectTCPV6CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectTCPV6CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectTCPV6CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectTCPV6CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectTCPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectTCPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectTCPV6CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectTCPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumUDPV6ValidArgsTestParse01(void) +{ + Signature s; + int result = 0; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectUDPV6CsumSetup(NULL, &s, "valid") == 0); + result &= (DetectUDPV6CsumSetup(NULL, &s, "invalid") == 0); + result &= (DetectUDPV6CsumSetup(NULL, &s, "vaLid") == 0); + result &= (DetectUDPV6CsumSetup(NULL, &s, "VALID") == 0); + result &= (DetectUDPV6CsumSetup(NULL, &s, "iNvaLid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectUDPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumUDPV6InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectUDPV6CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectUDPV6CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectUDPV6CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectUDPV6CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectUDPV6CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectUDPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectUDPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectUDPV6CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectUDPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumICMPV6ValidArgsTestParse01(void) +{ + Signature s; + int result = 0; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectICMPV6CsumSetup(NULL, &s, "valid") == 0); + result &= (DetectICMPV6CsumSetup(NULL, &s, "invalid") == 0); + result &= (DetectICMPV6CsumSetup(NULL, &s, "vaLid") == 0); + result &= (DetectICMPV6CsumSetup(NULL, &s, "VALID") == 0); + result &= (DetectICMPV6CsumSetup(NULL, &s, "iNvaLid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectICMPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +int DetectCsumICMPV6InValidArgsTestParse02(void) +{ + Signature s; + int result = -1; + SigMatch *temp = NULL; + + memset(&s, 0, sizeof(Signature)); + + result = (DetectICMPV6CsumSetup(NULL, &s, "vaid") == -1); + result &= (DetectICMPV6CsumSetup(NULL, &s, "invaalid") == -1); + result &= (DetectICMPV6CsumSetup(NULL, &s, "vaLiid") == -1); + result &= (DetectICMPV6CsumSetup(NULL, &s, "VALieD") == -1); + result &= (DetectICMPV6CsumSetup(NULL, &s, "iNvamid") == -1); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + DetectICMPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(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, "valid") == 0); + + while (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 1); + } + DetectICMPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + s.sm_lists[DETECT_SM_LIST_MATCH] = NULL; + + result &= (DetectICMPV6CsumSetup(NULL, &s, "INVALID") == 0); + + if (s.sm_lists[DETECT_SM_LIST_MATCH] != NULL) { + if (s.sm_lists[DETECT_SM_LIST_MATCH]->ctx != NULL) { + cd = (DetectCsumData *)s.sm_lists[DETECT_SM_LIST_MATCH]->ctx; + result &= (cd->valid == 0); + } + DetectICMPV6CsumFree(s.sm_lists[DETECT_SM_LIST_MATCH]->ctx); + temp = s.sm_lists[DETECT_SM_LIST_MATCH]; + s.sm_lists[DETECT_SM_LIST_MATCH] = s.sm_lists[DETECT_SM_LIST_MATCH]->next; + SCFree(temp); + } + + return result; +} + +#include "detect-engine.h" +#include "stream-tcp.h" + +int DetectCsumICMPV6Test01(void) +{ + int result = 0; + DetectEngineCtx *de_ctx = NULL; + Signature *s = NULL; + ThreadVars tv; + DetectEngineThreadCtx *det_ctx = NULL; + DecodeThreadVars dtv; + + Packet *p = PacketGetFromAlloc(); + if (p == NULL) { + printf("failure PacketGetFromAlloc\n"); + goto end; + } + + uint8_t pkt[] = { + 0x00, 0x30, 0x18, 0xa8, 0x7c, 0x23, 0x2c, 0x41, + 0x38, 0xa7, 0xea, 0xeb, 0x86, 0xdd, 0x60, 0x00, + 0x00, 0x00, 0x00, 0x40, 0x3c, 0x40, 0xad, 0xa1, + 0x09, 0x80, 0x00, 0x01, 0xd6, 0xf3, 0x20, 0x01, + 0xf4, 0xbe, 0xea, 0x3c, 0x00, 0x01, 0x00, 0x00, + 0x00, 0x00, 0x32, 0xb2, 0x00, 0x01, 0x32, 0xb2, + 0x09, 0x80, 0x20, 0x01, 0x00, 0x00, 0x3c, 0x00, + 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x00, + 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x00, + 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2c, 0x00, + 0x01, 0x04, 0x00, 0x00, 0x00, 0x00, 0x3a, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x00, + 0x63, 0xc2, 0x00, 0x00, 0x00, 0x00 }; + + PacketCopyData(p, pkt, sizeof(pkt)); + + memset(&tv, 0, sizeof(tv)); + memset(&dtv, 0, sizeof(dtv)); + + StreamTcpInitConfig(TRUE); + FlowInitConfig(FLOW_QUIET); + + de_ctx = DetectEngineCtxInit(); + if (de_ctx == NULL) { + printf("DetectEngineCtxInit failure\n"); + goto end; + } + de_ctx->mpm_matcher = DEFAULT_MPM; + de_ctx->flags |= DE_QUIET; + + s = de_ctx->sig_list = SigInit(de_ctx, "alert ip any any -> any any " + "(icmpv6-csum:valid; sid:1;)"); + if (s == NULL) { + printf("SigInit failed\n"); + goto end; + } + SigGroupBuild(de_ctx); + + DecodeEthernet(&tv, &dtv, p, GET_PKT_DATA(p), GET_PKT_LEN(p), NULL); + + DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx); + + SigMatchSignatures(&tv, de_ctx, det_ctx, p); + + if (!PacketAlertCheck(p, 1)) { + printf("sig 1 didn't alert on p, but it should: "); + goto end; + } + + result = 1; + + end: + if (det_ctx != NULL) + DetectEngineThreadCtxDeinit(&tv, det_ctx); + if (de_ctx != NULL) { + SigGroupCleanup(de_ctx); + DetectEngineCtxFree(de_ctx); + } + + StreamTcpFreeConfig(TRUE); + PACKET_RECYCLE(p); + FlowShutdown(); + + SCFree(p); + + 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); + + UtRegisterTest("DetectCsumICMPV6Test01", + DetectCsumICMPV6Test01, 1); + + +#endif /* UNITTESTS */ + +} |