/src/decode-ipv6.c
C | 871 lines | 675 code | 99 blank | 97 comment | 103 complexity | 2c2af963cd5d4cd21fe82565da68b2e3 MD5 | raw file
Possible License(s): GPL-2.0, Unlicense, AGPL-1.0
- /* Copyright (C) 2007-2010 Open Information Security Foundation
- *
- * You can copy, redistribute or modify this Program under the terms of
- * the GNU General Public License version 2 as published by the Free
- * Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- */
- /**
- * \ingroup decode
- *
- * @{
- */
- /**
- * \file
- *
- * \author Victor Julien <victor@inliniac.net>
- *
- * Decode IPv6
- */
- #include "suricata-common.h"
- #include "packet-queue.h"
- #include "decode.h"
- #include "decode-ipv6.h"
- #include "decode-icmpv6.h"
- #include "decode-events.h"
- #include "defrag.h"
- #include "pkt-var.h"
- #include "util-debug.h"
- #include "util-print.h"
- #include "util-unittest.h"
- #define IPV6_EXTHDRS ip6eh.ip6_exthdrs
- #define IPV6_EH_CNT ip6eh.ip6_exthdrs_cnt
- /**
- * \brief Function to decode IPv4 in IPv6 packets
- *
- */
- static void DecodeIPv4inIPv6(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t plen, PacketQueue *pq)
- {
- if (unlikely(plen < IPV4_HEADER_LEN)) {
- ENGINE_SET_EVENT(p, IPV4_IN_IPV6_PKT_TOO_SMALL);
- return;
- }
- if (IP_GET_RAW_VER(pkt) == 4) {
- if (pq != NULL) {
- Packet *tp = PacketPseudoPktSetup(p, pkt, plen, IPPROTO_IP);
- if (tp != NULL) {
- PKT_SET_SRC(tp, PKT_SRC_DECODER_IPV6);
- DecodeTunnel(tv, dtv, tp, GET_PKT_DATA(tp),
- GET_PKT_LEN(tp), pq, IPPROTO_IP);
- PacketEnqueue(pq,tp);
- SCPerfCounterIncr(dtv->counter_ipv4inipv6, tv->sc_perf_pca);
- return;
- }
- }
- } else {
- ENGINE_SET_EVENT(p, IPV4_IN_IPV6_WRONG_IP_VER);
- }
- return;
- }
- /**
- * \brief Function to decode IPv4 in IPv6 packets
- *
- */
- static void DecodeIP6inIP6(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t plen, PacketQueue *pq)
- {
- if (unlikely(plen < IPV6_HEADER_LEN)) {
- ENGINE_SET_EVENT(p, IPV6_IN_IPV6_PKT_TOO_SMALL);
- return;
- }
- if (IP_GET_RAW_VER(pkt) == 6) {
- if (pq != NULL) {
- Packet *tp = PacketPseudoPktSetup(p, pkt, plen, IPPROTO_IPV6);
- if (tp != NULL) {
- PKT_SET_SRC(tp, PKT_SRC_DECODER_IPV6);
- DecodeTunnel(tv, dtv, tp, GET_PKT_DATA(tp),
- GET_PKT_LEN(tp), pq, IPPROTO_IP);
- PacketEnqueue(pq,tp);
- SCPerfCounterIncr(dtv->counter_ipv6inipv6, tv->sc_perf_pca);
- return;
- }
- }
- } else {
- ENGINE_SET_EVENT(p, IPV6_IN_IPV6_WRONG_IP_VER);
- }
- return;
- }
- static void
- DecodeIPV6ExtHdrs(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len, PacketQueue *pq)
- {
- SCEnter();
- uint8_t *orig_pkt = pkt;
- uint8_t nh;
- uint16_t hdrextlen;
- uint16_t plen;
- char dstopts = 0;
- char exthdr_fh_done = 0;
- nh = IPV6_GET_NH(p);
- plen = len;
- while(1)
- {
- if (plen < 2) { /* minimal needed in a hdr */
- SCReturn;
- }
- switch(nh)
- {
- case IPPROTO_TCP:
- IPV6_SET_L4PROTO(p,nh);
- DecodeTCP(tv, dtv, p, pkt, plen, pq);
- SCReturn;
- case IPPROTO_UDP:
- IPV6_SET_L4PROTO(p,nh);
- DecodeUDP(tv, dtv, p, pkt, plen, pq);
- SCReturn;
- case IPPROTO_ICMPV6:
- IPV6_SET_L4PROTO(p,nh);
- DecodeICMPV6(tv, dtv, p, pkt, plen, pq);
- SCReturn;
- case IPPROTO_SCTP:
- IPV6_SET_L4PROTO(p,nh);
- DecodeSCTP(tv, dtv, p, pkt, plen, pq);
- SCReturn;
- case IPPROTO_ROUTING:
- IPV6_SET_L4PROTO(p,nh);
- hdrextlen = 8 + (*(pkt+1) * 8); /* 8 bytes + length in 8 octet units */
- SCLogDebug("hdrextlen %"PRIu8, hdrextlen);
- if (hdrextlen > plen) {
- ENGINE_SET_EVENT(p, IPV6_TRUNC_EXTHDR);
- SCReturn;
- }
- if (p->IPV6_EH_CNT < IPV6_MAX_OPT)
- {
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].type = nh;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].next = *pkt;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].len = hdrextlen;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].data = pkt+2;
- p->IPV6_EH_CNT++;
- }
- if (IPV6_EXTHDR_ISSET_RH(p)) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_DUPL_RH);
- /* skip past this extension so we can continue parsing the rest
- * of the packet */
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- IPV6_EXTHDR_SET_RH(p, pkt);
- IPV6_EXTHDR_RH(p)->ip6rh_len = hdrextlen;
- /** \todo move into own function and load on demand */
- if (IPV6_EXTHDR_RH(p)->ip6rh_type == 0) {
- uint8_t i;
- uint8_t n = IPV6_EXTHDR_RH(p)->ip6rh_len / 2;
- /* because we devide the header len by 2 (as rfc 2460 tells us to)
- * we devide the result by 8 and not 16 as the header fields are
- * sized */
- for (i = 0; i < (n/8) && i < sizeof(IPV6_EXTHDR_RH(p)->ip6rh0_addr)/sizeof(struct in6_addr); ++i) {
- /* the address header fields are 16 bytes in size */
- /** \todo do this without memcpy since it's expensive */
- memcpy(&IPV6_EXTHDR_RH(p)->ip6rh0_addr[i], pkt+(i*16)+8, sizeof(IPV6_EXTHDR_RH(p)->ip6rh0_addr[i]));
- }
- IPV6_EXTHDR_RH(p)->ip6rh0_num_addrs = i;
- }
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- case IPPROTO_HOPOPTS:
- case IPPROTO_DSTOPTS:
- {
- IPV6OptHAO *hao = NULL;
- IPV6OptRA *ra = NULL;
- IPV6OptJumbo *jumbo = NULL;
- uint8_t optslen = 0;
- IPV6_SET_L4PROTO(p,nh);
- hdrextlen = (*(pkt+1) + 1) << 3;
- if (hdrextlen > plen) {
- ENGINE_SET_EVENT(p, IPV6_TRUNC_EXTHDR);
- SCReturn;
- }
- if (p->IPV6_EH_CNT < IPV6_MAX_OPT)
- {
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].type = nh;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].next = *pkt;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].len = hdrextlen;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].data = pkt+2;
- p->IPV6_EH_CNT++;
- }
- uint8_t *ptr = pkt + 2; /* +2 to go past nxthdr and len */
- /* point the pointers to right structures
- * in Packet. */
- if (nh == IPPROTO_HOPOPTS) {
- if (IPV6_EXTHDR_ISSET_HH(p)) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_DUPL_HH);
- /* skip past this extension so we can continue parsing the rest
- * of the packet */
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- IPV6_EXTHDR_SET_HH(p, pkt);
- hao = &IPV6_EXTHDR_HH_HAO(p);
- ra = &IPV6_EXTHDR_HH_RA(p);
- jumbo = &IPV6_EXTHDR_HH_JUMBO(p);
- optslen = ((IPV6_EXTHDR_HH(p)->ip6hh_len+1)<<3)-2;
- }
- else if (nh == IPPROTO_DSTOPTS)
- {
- if (dstopts == 0) {
- IPV6_EXTHDR_SET_DH1(p, pkt);
- hao = &IPV6_EXTHDR_DH1_HAO(p);
- ra = &IPV6_EXTHDR_DH1_RA(p);
- jumbo = &IPV6_EXTHDR_DH2_JUMBO(p);
- optslen = ((IPV6_EXTHDR_DH1(p)->ip6dh_len+1)<<3)-2;
- dstopts = 1;
- } else if (dstopts == 1) {
- IPV6_EXTHDR_SET_DH2(p, pkt);
- hao = &IPV6_EXTHDR_DH2_HAO(p);
- ra = &IPV6_EXTHDR_DH2_RA(p);
- jumbo = &IPV6_EXTHDR_DH2_JUMBO(p);
- optslen = ((IPV6_EXTHDR_DH2(p)->ip6dh_len+1)<<3)-2;
- dstopts = 2;
- } else {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_DUPL_DH);
- /* skip past this extension so we can continue parsing the rest
- * of the packet */
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- }
- if (optslen > plen) {
- /* since the packet is long enough (we checked
- * plen against hdrlen, the optlen must be malformed. */
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_INVALID_OPTLEN);
- /* skip past this extension so we can continue parsing the rest
- * of the packet */
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- /** \todo move into own function to loaded on demand */
- uint16_t padn_cnt = 0;
- uint16_t other_cnt = 0;
- uint16_t offset = 0;
- while(offset < optslen)
- {
- if (*ptr == IPV6OPT_PADN) /* PadN */
- {
- //printf("PadN option\n");
- padn_cnt++;
- }
- else if (*ptr == IPV6OPT_RA) /* RA */
- {
- ra->ip6ra_type = *(ptr);
- ra->ip6ra_len = *(ptr + 1);
- memcpy(&ra->ip6ra_value, (ptr + 2), sizeof(ra->ip6ra_value));
- ra->ip6ra_value = ntohs(ra->ip6ra_value);
- //printf("RA option: type %" PRIu32 " len %" PRIu32 " value %" PRIu32 "\n",
- // ra->ip6ra_type, ra->ip6ra_len, ra->ip6ra_value);
- other_cnt++;
- }
- else if (*ptr == IPV6OPT_JUMBO) /* Jumbo */
- {
- jumbo->ip6j_type = *(ptr);
- jumbo->ip6j_len = *(ptr+1);
- memcpy(&jumbo->ip6j_payload_len, (ptr+2), sizeof(jumbo->ip6j_payload_len));
- jumbo->ip6j_payload_len = ntohl(jumbo->ip6j_payload_len);
- //printf("Jumbo option: type %" PRIu32 " len %" PRIu32 " payload len %" PRIu32 "\n",
- // jumbo->ip6j_type, jumbo->ip6j_len, jumbo->ip6j_payload_len);
- }
- else if (*ptr == IPV6OPT_HAO) /* HAO */
- {
- hao->ip6hao_type = *(ptr);
- hao->ip6hao_len = *(ptr+1);
- memcpy(&hao->ip6hao_hoa, (ptr+2), sizeof(hao->ip6hao_hoa));
- //printf("HAO option: type %" PRIu32 " len %" PRIu32 " ",
- // hao->ip6hao_type, hao->ip6hao_len);
- //char addr_buf[46];
- //PrintInet(AF_INET6, (char *)&(hao->ip6hao_hoa),
- // addr_buf,sizeof(addr_buf));
- //printf("home addr %s\n", addr_buf);
- other_cnt++;
- } else {
- if (nh == IPPROTO_HOPOPTS)
- ENGINE_SET_EVENT(p, IPV6_HOPOPTS_UNKNOWN_OPT);
- else
- ENGINE_SET_EVENT(p, IPV6_DSTOPTS_UNKNOWN_OPT);
- other_cnt++;
- }
- uint16_t optlen = (*(ptr + 1) + 2);
- ptr += optlen; /* +2 for opt type and opt len fields */
- offset += optlen;
- }
- /* flag packets that have only padding */
- if (padn_cnt > 0 && other_cnt == 0) {
- if (nh == IPPROTO_HOPOPTS)
- ENGINE_SET_EVENT(p, IPV6_HOPOPTS_ONLY_PADDING);
- else
- ENGINE_SET_EVENT(p, IPV6_DSTOPTS_ONLY_PADDING);
- }
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- case IPPROTO_FRAGMENT:
- IPV6_SET_L4PROTO(p,nh);
- /* store the offset of this extension into the packet
- * past the ipv6 header. We use it in defrag for creating
- * a defragmented packet without the frag header */
- if (exthdr_fh_done == 0) {
- p->ip6eh.fh_offset = pkt - orig_pkt;
- exthdr_fh_done = 1;
- }
- hdrextlen = sizeof(IPV6FragHdr);
- if (hdrextlen > plen) {
- ENGINE_SET_EVENT(p, IPV6_TRUNC_EXTHDR);
- SCReturn;
- }
- if(p->IPV6_EH_CNT<IPV6_MAX_OPT)
- {
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].type = nh;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].next = *pkt;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].len = hdrextlen;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].data = pkt+2;
- p->IPV6_EH_CNT++;
- }
- if (IPV6_EXTHDR_ISSET_FH(p)) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_DUPL_FH);
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- /* set the header ptr first */
- IPV6_EXTHDR_SET_FH(p, pkt);
- /* if FH has offset 0 and no more fragments are coming, we
- * parse this packet further right away, no defrag will be
- * needed. It is a useless FH then though, so we do set an
- * decoder event. */
- if (IPV6_EXTHDR_GET_FH_FLAG(p) == 0 && IPV6_EXTHDR_GET_FH_OFFSET(p) == 0) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_USELESS_FH);
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- /* the rest is parsed upon reassembly */
- SCReturn;
- case IPPROTO_ESP:
- {
- IPV6_SET_L4PROTO(p,nh);
- hdrextlen = sizeof(IPV6EspHdr);
- if (hdrextlen > plen) {
- ENGINE_SET_EVENT(p, IPV6_TRUNC_EXTHDR);
- SCReturn;
- }
- if(p->IPV6_EH_CNT<IPV6_MAX_OPT)
- {
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].type = nh;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].next = IPPROTO_NONE;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].len = hdrextlen;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].data = pkt+2;
- p->IPV6_EH_CNT++;
- }
- if (IPV6_EXTHDR_ISSET_EH(p)) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_DUPL_EH);
- SCReturn;
- }
- IPV6_EXTHDR_SET_EH(p, pkt);
- nh = IPPROTO_NONE;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- case IPPROTO_AH:
- {
- IPV6_SET_L4PROTO(p,nh);
- /* we need the header as a minimum */
- hdrextlen = sizeof(IPV6AuthHdr);
- /* the payload len field is the number of extra 4 byte fields,
- * IPV6AuthHdr already contains the first */
- if (*(pkt+1) > 0)
- hdrextlen += ((*(pkt+1) - 1) * 4);
- SCLogDebug("hdrextlen %"PRIu8, hdrextlen);
- if (hdrextlen > plen) {
- ENGINE_SET_EVENT(p, IPV6_TRUNC_EXTHDR);
- SCReturn;
- }
- IPV6AuthHdr *ahhdr = (IPV6AuthHdr *)pkt;
- if (ahhdr->ip6ah_reserved != 0x0000) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_AH_RES_NOT_NULL);
- }
- if(p->IPV6_EH_CNT < IPV6_MAX_OPT)
- {
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].type = nh;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].next = *pkt;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].len = hdrextlen;
- p->IPV6_EXTHDRS[p->IPV6_EH_CNT].data = pkt+2;
- p->IPV6_EH_CNT++;
- }
- if (IPV6_EXTHDR_ISSET_AH(p)) {
- ENGINE_SET_EVENT(p, IPV6_EXTHDR_DUPL_AH);
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- IPV6_EXTHDR_SET_AH(p, pkt);
- nh = *pkt;
- pkt += hdrextlen;
- plen -= hdrextlen;
- break;
- }
- case IPPROTO_IPIP:
- IPV6_SET_L4PROTO(p,nh);
- DecodeIPv4inIPv6(tv, dtv, p, pkt, plen, pq);
- SCReturn;
- case IPPROTO_NONE:
- IPV6_SET_L4PROTO(p,nh);
- SCReturn;
- case IPPROTO_ICMP:
- ENGINE_SET_EVENT(p,IPV6_WITH_ICMPV4);
- break;
- default:
- IPV6_SET_L4PROTO(p,nh);
- SCReturn;
- }
- }
- SCReturn;
- }
- static int DecodeIPV6Packet (ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len)
- {
- if (len < IPV6_HEADER_LEN) {
- return -1;
- }
- if (IP_GET_RAW_VER(pkt) != 6) {
- SCLogDebug("wrong ip version %" PRIu8 "",IP_GET_RAW_VER(pkt));
- ENGINE_SET_EVENT(p,IPV6_WRONG_IP_VER);
- return -1;
- }
- p->ip6h = (IPV6Hdr *)pkt;
- if (len < (IPV6_HEADER_LEN + IPV6_GET_PLEN(p)))
- {
- ENGINE_SET_EVENT(p,IPV6_TRUNC_PKT);
- return -1;
- }
- SET_IPV6_SRC_ADDR(p,&p->src);
- SET_IPV6_DST_ADDR(p,&p->dst);
- return 0;
- }
- void DecodeIPV6(ThreadVars *tv, DecodeThreadVars *dtv, Packet *p, uint8_t *pkt, uint16_t len, PacketQueue *pq)
- {
- int ret;
- SCPerfCounterIncr(dtv->counter_ipv6, tv->sc_perf_pca);
- /* do the actual decoding */
- ret = DecodeIPV6Packet (tv, dtv, p, pkt, len);
- if (ret < 0) {
- p->ip6h = NULL;
- return;
- }
- #ifdef DEBUG
- if (SCLogDebugEnabled()) { /* only convert the addresses if debug is really enabled */
- /* debug print */
- char s[46], d[46];
- PrintInet(AF_INET6, (const void *)GET_IPV6_SRC_ADDR(p), s, sizeof(s));
- PrintInet(AF_INET6, (const void *)GET_IPV6_DST_ADDR(p), d, sizeof(d));
- SCLogDebug("IPV6 %s->%s - CLASS: %" PRIu32 " FLOW: %" PRIu32 " NH: %" PRIu32 " PLEN: %" PRIu32 " HLIM: %" PRIu32 "", s,d,
- IPV6_GET_CLASS(p), IPV6_GET_FLOW(p), IPV6_GET_NH(p), IPV6_GET_PLEN(p),
- IPV6_GET_HLIM(p));
- }
- #endif /* DEBUG */
- /* now process the Ext headers and/or the L4 Layer */
- switch(IPV6_GET_NH(p)) {
- case IPPROTO_TCP:
- IPV6_SET_L4PROTO (p, IPPROTO_TCP);
- return DecodeTCP(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- case IPPROTO_UDP:
- IPV6_SET_L4PROTO (p, IPPROTO_UDP);
- return DecodeUDP(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- break;
- case IPPROTO_ICMPV6:
- IPV6_SET_L4PROTO (p, IPPROTO_ICMPV6);
- return DecodeICMPV6(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- case IPPROTO_SCTP:
- IPV6_SET_L4PROTO (p, IPPROTO_SCTP);
- return DecodeSCTP(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- case IPPROTO_IPIP:
- IPV6_SET_L4PROTO(p, IPPROTO_IPIP);
- return DecodeIPv4inIPv6(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- case IPPROTO_IPV6:
- return DecodeIP6inIP6(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- case IPPROTO_FRAGMENT:
- case IPPROTO_HOPOPTS:
- case IPPROTO_ROUTING:
- case IPPROTO_NONE:
- case IPPROTO_DSTOPTS:
- case IPPROTO_AH:
- case IPPROTO_ESP:
- DecodeIPV6ExtHdrs(tv, dtv, p, pkt + IPV6_HEADER_LEN, IPV6_GET_PLEN(p), pq);
- break;
- case IPPROTO_ICMP:
- ENGINE_SET_EVENT(p,IPV6_WITH_ICMPV4);
- break;
- default:
- p->proto = IPV6_GET_NH(p);
- break;
- }
- /* Pass to defragger if a fragment. */
- if (IPV6_EXTHDR_ISSET_FH(p)) {
- Packet *rp = Defrag(tv, dtv, p);
- if (rp != NULL) {
- DecodeIPV6(tv, dtv, rp, (uint8_t *)rp->ip6h, IPV6_GET_PLEN(rp) + IPV6_HEADER_LEN, pq);
- PacketEnqueue(pq, rp);
- /* Not really a tunnel packet, but we're piggybacking that
- * functionality for now. */
- SET_TUNNEL_PKT(p);
- }
- }
- #ifdef DEBUG
- if (IPV6_EXTHDR_ISSET_FH(p)) {
- SCLogDebug("IPV6 FRAG - HDRLEN: %" PRIuMAX " NH: %" PRIu32 " OFFSET: %" PRIu32 " ID: %" PRIu32 "",
- (uintmax_t)IPV6_EXTHDR_GET_FH_HDRLEN(p), IPV6_EXTHDR_GET_FH_NH(p),
- IPV6_EXTHDR_GET_FH_OFFSET(p), IPV6_EXTHDR_GET_FH_ID(p));
- }
- if (IPV6_EXTHDR_ISSET_RH(p)) {
- SCLogDebug("IPV6 ROUTE - HDRLEN: %" PRIu32 " NH: %" PRIu32 " TYPE: %" PRIu32 "",
- IPV6_EXTHDR_GET_RH_HDRLEN(p), IPV6_EXTHDR_GET_RH_NH(p),
- IPV6_EXTHDR_GET_RH_TYPE(p));
- }
- if (IPV6_EXTHDR_ISSET_HH(p)) {
- SCLogDebug("IPV6 HOPOPT - HDRLEN: %" PRIu32 " NH: %" PRIu32 "",
- IPV6_EXTHDR_GET_HH_HDRLEN(p), IPV6_EXTHDR_GET_HH_NH(p));
- }
- if (IPV6_EXTHDR_ISSET_DH1(p)) {
- SCLogDebug("IPV6 DSTOPT1 - HDRLEN: %" PRIu32 " NH: %" PRIu32 "",
- IPV6_EXTHDR_GET_DH1_HDRLEN(p), IPV6_EXTHDR_GET_DH1_NH(p));
- }
- if (IPV6_EXTHDR_ISSET_DH2(p)) {
- SCLogDebug("IPV6 DSTOPT2 - HDRLEN: %" PRIu32 " NH: %" PRIu32 "",
- IPV6_EXTHDR_GET_DH2_HDRLEN(p), IPV6_EXTHDR_GET_DH2_NH(p));
- }
- #endif
- return;
- }
- #ifdef UNITTESTS
- /**
- * \test fragment decoding
- */
- static int DecodeIPV6FragTest01 (void) {
- uint8_t raw_frag1[] = {
- 0x60, 0x0f, 0x1a, 0xcf, 0x05, 0xa8, 0x2c, 0x36, 0x20, 0x01, 0x04, 0x70, 0x00, 0x01, 0x00, 0x18,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x20, 0x01, 0x09, 0x80, 0x32, 0xb2, 0x00, 0x01,
- 0x2e, 0x41, 0x38, 0xff, 0xfe, 0xa7, 0xea, 0xeb, 0x06, 0x00, 0x00, 0x01, 0xdf, 0xf8, 0x11, 0xd7,
- 0x00, 0x50, 0xa6, 0x5c, 0xcc, 0xd7, 0x28, 0x9f, 0xc3, 0x34, 0xc6, 0x58, 0x80, 0x10, 0x20, 0x13,
- 0x18, 0x1f, 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0xcd, 0xf9, 0x3a, 0x41, 0x00, 0x1a, 0x91, 0x8a,
- 0x48, 0x54, 0x54, 0x50, 0x2f, 0x31, 0x2e, 0x31, 0x20, 0x32, 0x30, 0x30, 0x20, 0x4f, 0x4b, 0x0d,
- 0x0a, 0x44, 0x61, 0x74, 0x65, 0x3a, 0x20, 0x46, 0x72, 0x69, 0x2c, 0x20, 0x30, 0x32, 0x20, 0x44,
- 0x65, 0x63, 0x20, 0x32, 0x30, 0x31, 0x31, 0x20, 0x30, 0x38, 0x3a, 0x33, 0x32, 0x3a, 0x35, 0x37,
- 0x20, 0x47, 0x4d, 0x54, 0x0d, 0x0a, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x3a, 0x20, 0x41, 0x70,
- 0x61, 0x63, 0x68, 0x65, 0x0d, 0x0a, 0x43, 0x61, 0x63, 0x68, 0x65, 0x2d, 0x43, 0x6f, 0x6e, 0x74,
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- 0x31, 0x20, 0x4a, 0x61, 0x6e, 0x20, 0x31, 0x39, 0x37, 0x31, 0x20, 0x30, 0x30, 0x3a, 0x30, 0x30,
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- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- };
- uint8_t raw_frag2[] = {
- 0x60, 0x0f, 0x1a, 0xcf, 0x00, 0x1c, 0x2c, 0x36, 0x20, 0x01, 0x04, 0x70, 0x00, 0x01, 0x00, 0x18,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x20, 0x01, 0x09, 0x80, 0x32, 0xb2, 0x00, 0x01,
- 0x2e, 0x41, 0x38, 0xff, 0xfe, 0xa7, 0xea, 0xeb, 0x06, 0x00, 0x05, 0xa0, 0xdf, 0xf8, 0x11, 0xd7,
- 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
- 0x20, 0x20, 0x20, 0x20,
- };
- Packet *p1 = SCMalloc(SIZE_OF_PACKET);
- if (unlikely(p1 == NULL))
- return 0;
- Packet *p2 = SCMalloc(SIZE_OF_PACKET);
- if (unlikely(p2 == NULL)) {
- SCFree(p1);
- return 0;
- }
- ThreadVars tv;
- DecodeThreadVars dtv;
- int result = 0;
- PacketQueue pq;
- FlowInitConfig(FLOW_QUIET);
- DefragInit();
- memset(&pq, 0, sizeof(PacketQueue));
- memset(&tv, 0, sizeof(ThreadVars));
- memset(p1, 0, SIZE_OF_PACKET);
- p1->pkt = (uint8_t *)(p1 + 1);
- memset(p2, 0, SIZE_OF_PACKET);
- p2->pkt = (uint8_t *)(p2 + 1);
- memset(&dtv, 0, sizeof(DecodeThreadVars));
- PACKET_INITIALIZE(p1);
- PACKET_INITIALIZE(p2);
- PacketCopyData(p1, raw_frag1, sizeof(raw_frag1));
- PacketCopyData(p2, raw_frag2, sizeof(raw_frag2));
- DecodeIPV6(&tv, &dtv, p1, GET_PKT_DATA(p1), GET_PKT_LEN(p1), &pq);
- if (!(IPV6_EXTHDR_ISSET_FH(p1))) {
- printf("ipv6 frag header not detected: ");
- goto end;
- }
- DecodeIPV6(&tv, &dtv, p2, GET_PKT_DATA(p2), GET_PKT_LEN(p2), &pq);
- if (!(IPV6_EXTHDR_ISSET_FH(p2))) {
- printf("ipv6 frag header not detected: ");
- goto end;
- }
- if (pq.len != 1) {
- printf("no reassembled packet: ");
- goto end;
- }
- result = 1;
- end:
- PACKET_CLEANUP(p1);
- PACKET_CLEANUP(p2);
- SCFree(p1);
- SCFree(p2);
- DefragDestroy();
- FlowShutdown();
- return result;
- }
- /**
- * \test routing header decode
- */
- static int DecodeIPV6RouteTest01 (void) {
- uint8_t raw_pkt1[] = {
- 0x60, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x2b, 0x40,
- 0x20, 0x01, 0xaa, 0xaa, 0x00, 0x01, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
- 0x20, 0x01, 0xaa, 0xaa, 0x00, 0x01, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
- 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0xb2, 0xed, 0x00, 0x50, 0x1b, 0xc7, 0x6a, 0xdf,
- 0x00, 0x00, 0x00, 0x00, 0x50, 0x02, 0x20, 0x00,
- 0xfa, 0x87, 0x00, 0x00,
- };
- Packet *p1 = SCMalloc(SIZE_OF_PACKET);
- if (unlikely(p1 == NULL))
- return 0;
- ThreadVars tv;
- DecodeThreadVars dtv;
- int result = 0;
- PacketQueue pq;
- FlowInitConfig(FLOW_QUIET);
- memset(&pq, 0, sizeof(PacketQueue));
- memset(&tv, 0, sizeof(ThreadVars));
- memset(p1, 0, SIZE_OF_PACKET);
- p1->pkt = (uint8_t *)(p1 + 1);
- memset(&dtv, 0, sizeof(DecodeThreadVars));
- PACKET_INITIALIZE(p1);
- PacketCopyData(p1, raw_pkt1, sizeof(raw_pkt1));
- DecodeIPV6(&tv, &dtv, p1, GET_PKT_DATA(p1), GET_PKT_LEN(p1), &pq);
- if (!(IPV6_EXTHDR_ISSET_RH(p1))) {
- printf("ipv6 routing header not detected: ");
- goto end;
- }
- if (p1->ip6eh.ip6_exthdrs[0].len != 8) {
- printf("ipv6 routing length incorrect: ");
- goto end;
- }
- result = 1;
- end:
- PACKET_CLEANUP(p1);
- SCFree(p1);
- FlowShutdown();
- return result;
- }
- #endif /* UNITTESTS */
- /**
- * \brief this function registers unit tests for IPV6 decoder
- */
- void DecodeIPV6RegisterTests(void) {
- #ifdef UNITTESTS
- UtRegisterTest("DecodeIPV6FragTest01", DecodeIPV6FragTest01, 1);
- UtRegisterTest("DecodeIPV6RouteTest01", DecodeIPV6RouteTest01, 1);
- #endif /* UNITTESTS */
- }
- /**
- * @}
- */