diff options
author | Ashlee Young <ashlee@onosfw.com> | 2015-09-09 22:21:41 -0700 |
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committer | Ashlee Young <ashlee@onosfw.com> | 2015-09-09 22:21:41 -0700 |
commit | 8879b125d26e8db1a5633de5a9c692eb2d1c4f83 (patch) | |
tree | c7259d85a991b83dfa85ab2e339360669fc1f58e /framework/src/suricata/src/decode-ipv6.h | |
parent | 13d05bc8458758ee39cb829098241e89616717ee (diff) |
suricata checkin based on commit id a4bce14770beee46a537eda3c3f6e8e8565d5d0a
Change-Id: I9a214fa0ee95e58fc640e50bd604dac7f42db48f
Diffstat (limited to 'framework/src/suricata/src/decode-ipv6.h')
-rw-r--r-- | framework/src/suricata/src/decode-ipv6.h | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/framework/src/suricata/src/decode-ipv6.h b/framework/src/suricata/src/decode-ipv6.h new file mode 100644 index 00000000..da58d9e2 --- /dev/null +++ b/framework/src/suricata/src/decode-ipv6.h @@ -0,0 +1,334 @@ +/* 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 Victor Julien <victor@inliniac.net> + */ + +#ifndef __DECODE_IPV6_H__ +#define __DECODE_IPV6_H__ + +#define IPV6_HEADER_LEN 40 +#define IPV6_MAXPACKET 65535 /* maximum packet size */ +#define IPV6_MAX_OPT 40 + +typedef struct IPV6Hdr_ +{ + union { + struct ip6_un1_ { + uint32_t ip6_un1_flow; /* 20 bits of flow-ID */ + uint16_t ip6_un1_plen; /* payload length */ + uint8_t ip6_un1_nxt; /* next header */ + uint8_t ip6_un1_hlim; /* hop limit */ + } ip6_un1; + uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ + } ip6_hdrun; + + union { + struct { + uint32_t ip6_src[4]; + uint32_t ip6_dst[4]; + } ip6_un2; + uint16_t ip6_addrs[16]; + } ip6_hdrun2; +} __attribute__((__packed__)) IPV6Hdr; + +#define s_ip6_src ip6_hdrun2.ip6_un2.ip6_src +#define s_ip6_dst ip6_hdrun2.ip6_un2.ip6_dst +#define s_ip6_addrs ip6_hdrun2.ip6_addrs + +#define s_ip6_vfc ip6_hdrun.ip6_un2_vfc +#define s_ip6_flow ip6_hdrun.ip6_un1.ip6_un1_flow +#define s_ip6_plen ip6_hdrun.ip6_un1.ip6_un1_plen +#define s_ip6_nxt ip6_hdrun.ip6_un1.ip6_un1_nxt +#define s_ip6_hlim ip6_hdrun.ip6_un1.ip6_un1_hlim + +#define IPV6_GET_RAW_VER(ip6h) (((ip6h)->s_ip6_vfc & 0xf0) >> 4) +#define IPV6_GET_RAW_CLASS(ip6h) ((ntohl((ip6h)->s_ip6_flow) & 0x0FF00000) >> 20) +#define IPV6_GET_RAW_FLOW(ip6h) (ntohl((ip6h)->s_ip6_flow) & 0x000FFFFF) +#define IPV6_GET_RAW_NH(ip6h) ((ip6h)->s_ip6_nxt) +#define IPV6_GET_RAW_PLEN(ip6h) (ntohs((ip6h)->s_ip6_plen)) +#define IPV6_GET_RAW_HLIM(ip6h) ((ip6h)->s_ip6_hlim) + +#define IPV6_SET_RAW_VER(ip6h, value) ((ip6h)->s_ip6_vfc = (((ip6h)->s_ip6_vfc & 0x0f) | (value << 4))) +#define IPV6_SET_RAW_NH(ip6h, value) ((ip6h)->s_ip6_nxt = (value)) + +#define IPV6_SET_L4PROTO(p,proto) (p)->ip6vars.l4proto = proto + + +/* ONLY call these functions after making sure that: + * 1. p->ip6h is set + * 2. p->ip6h is valid (len is correct) + */ +#define IPV6_GET_VER(p) \ + IPV6_GET_RAW_VER((p)->ip6h) +#define IPV6_GET_CLASS(p) \ + IPV6_GET_RAW_CLASS((p)->ip6h) +#define IPV6_GET_FLOW(p) \ + IPV6_GET_RAW_FLOW((p)->ip6h) +#define IPV6_GET_NH(p) \ + (IPV6_GET_RAW_NH((p)->ip6h)) +#define IPV6_GET_PLEN(p) \ + IPV6_GET_RAW_PLEN((p)->ip6h) +#define IPV6_GET_HLIM(p) \ + (IPV6_GET_RAW_HLIM((p)->ip6h)) +/* XXX */ +#define IPV6_GET_L4PROTO(p) \ + ((p)->ip6vars.l4proto) + +/** \brief get the highest proto/next header field we know */ +//#define IPV6_GET_UPPER_PROTO(p) (p)->ip6eh.ip6_exthdrs_cnt ? +// (p)->ip6eh.ip6_exthdrs[(p)->ip6eh.ip6_exthdrs_cnt - 1].next : IPV6_GET_NH((p)) + +/* helper structure with parsed ipv6 info */ +typedef struct IPV6Vars_ +{ + uint8_t ip_opts_len; + uint8_t l4proto; /* the proto after the extension headers + * store while decoding so we don't have + * to loop through the exthdrs all the time */ +} IPV6Vars; + +#define CLEAR_IPV6_PACKET(p) do { \ + (p)->ip6h = NULL; \ + (p)->ip6vars.ip_opts_len = 0; \ + (p)->ip6vars.l4proto = 0; \ + (p)->ip6eh.ip6fh = NULL; \ + (p)->ip6eh.fh_offset = 0; \ + (p)->ip6eh.ip6rh = NULL; \ + (p)->ip6eh.ip6eh = NULL; \ + (p)->ip6eh.ip6dh1 = NULL; \ + (p)->ip6eh.ip6dh2 = NULL; \ + (p)->ip6eh.ip6hh = NULL; \ + (p)->ip6eh.ip6_exthdrs_cnt = 0; \ +} while (0) + +/* Fragment header */ +typedef struct IPV6FragHdr_ +{ + uint8_t ip6fh_nxt; /* next header */ + uint8_t ip6fh_reserved; /* reserved field */ + uint16_t ip6fh_offlg; /* offset, reserved, and flag */ + uint32_t ip6fh_ident; /* identification */ +} __attribute__((__packed__)) IPV6FragHdr; + +#define IPV6_EXTHDR_GET_RAW_FH_NH(p) ((p)->ip6eh.ip6fh->ip6fh_nxt) +#define IPV6_EXTHDR_GET_RAW_FH_HDRLEN(p) sizeof(IPV6FragHdr) +#define IPV6_EXTHDR_GET_RAW_FH_OFFSET(p) (ntohs((p)->ip6eh.ip6fh->ip6fh_offlg) & 0xFFF8) +#define IPV6_EXTHDR_GET_RAW_FH_FLAG(p) (ntohs((p)->ip6eh.ip6fh->ip6fh_offlg) & 0x0001) +#define IPV6_EXTHDR_GET_RAW_FH_ID(p) (ntohl((p)->ip6eh.ip6fh->ip6fh_ident)) + +#define IPV6_EXTHDR_GET_FH_NH(p) IPV6_EXTHDR_GET_RAW_FH_NH((p)) +#define IPV6_EXTHDR_GET_FH_HDRLEN(p) IPV6_EXTHDR_GET_RAW_FH_HDRLEN((p)) +#define IPV6_EXTHDR_GET_FH_OFFSET(p) IPV6_EXTHDR_GET_RAW_FH_OFFSET((p)) +#define IPV6_EXTHDR_GET_FH_FLAG(p) IPV6_EXTHDR_GET_RAW_FH_FLAG((p)) +#define IPV6_EXTHDR_GET_FH_ID(p) IPV6_EXTHDR_GET_RAW_FH_ID((p)) + +/* rfc 1826 */ +typedef struct IPV6AuthHdr_ +{ + uint8_t ip6ah_nxt; /* next header */ + uint8_t ip6ah_len; /* header length in units of 8 bytes, not + including first 8 bytes. */ + uint16_t ip6ah_reserved; /* reserved for future use */ + uint32_t ip6ah_spi; /* SECURITY PARAMETERS INDEX (SPI) */ + uint32_t ip6ah_seq; /* sequence number */ +} __attribute__((__packed__)) IPV6AuthHdr; + +typedef struct IPV6EspHdr_ +{ + uint32_t ip6esph_spi; /* SECURITY PARAMETERS INDEX (SPI) */ + uint32_t ip6esph_seq; /* sequence number */ +} __attribute__((__packed__)) IPV6EspHdr; + +typedef struct IPV6RouteHdr_ +{ + uint8_t ip6rh_nxt; /* next header */ + uint8_t ip6rh_len; /* header length in units of 8 bytes, not + including first 8 bytes. */ + uint8_t ip6rh_type; /* routing type */ + uint8_t ip6rh_segsleft; /* segments left */ +#if 0 + struct in6_addr ip6rh0_addr[23]; /* type 0 addresses */ + uint8_t ip6rh0_num_addrs; /* number of actual addresses in the + array/packet. The array is guarranteed + to be filled up to this number. */ +#endif +} __attribute__((__packed__)) IPV6RouteHdr; + +#define IPV6_EXTHDR_GET_RAW_RH_NH(p) ((p)->ip6eh.ip6rh->ip6rh_nxt) +#define IPV6_EXTHDR_GET_RAW_RH_HDRLEN(p) ((p)->ip6eh.ip6rh->ip6rh_len) +#define IPV6_EXTHDR_GET_RAW_RH_TYPE(p) (ntohs((p)->ip6eh.ip6rh->ip6rh_type)) +/* XXX */ + +#define IPV6_EXTHDR_GET_RH_NH(p) IPV6_EXTHDR_GET_RAW_RH_NH((p)) +#define IPV6_EXTHDR_GET_RH_HDRLEN(p) IPV6_EXTHDR_GET_RAW_RH_HDRLEN((p)) +#define IPV6_EXTHDR_GET_RH_TYPE(p) IPV6_EXTHDR_GET_RAW_RH_TYPE((p)) +/* XXX */ + + +/* Hop-by-Hop header and Destination Options header use options that are + * defined here. */ + +#define IPV6OPT_PAD1 0x00 +#define IPV6OPT_PADN 0x01 +#define IPV6OPT_RA 0x05 +#define IPV6OPT_JUMBO 0xC2 +#define IPV6OPT_HAO 0xC9 + +/* Home Address Option */ +typedef struct IPV6OptHAO_ +{ + uint8_t ip6hao_type; /* Option type */ + uint8_t ip6hao_len; /* Option Data len (excludes type and len) */ + struct in6_addr ip6hao_hoa; /* Home address. */ +} IPV6OptHAO; + +/* Router Alert Option */ +typedef struct IPV6OptRA_ +{ + uint8_t ip6ra_type; /* Option type */ + uint8_t ip6ra_len; /* Option Data len (excludes type and len) */ + uint16_t ip6ra_value; /* Router Alert value */ +} IPV6OptRA; + +/* Jumbo Option */ +typedef struct IPV6OptJumbo_ +{ + uint8_t ip6j_type; /* Option type */ + uint8_t ip6j_len; /* Option Data len (excludes type and len) */ + uint32_t ip6j_payload_len; /* Jumbo Payload Length */ +} IPV6OptJumbo; + +typedef struct IPV6HopOptsHdr_ +{ + uint8_t ip6hh_nxt; /* next header */ + uint8_t ip6hh_len; /* header length in units of 8 bytes, not + including first 8 bytes. */ +} __attribute__((__packed__)) IPV6HopOptsHdr; + +#define IPV6_EXTHDR_GET_RAW_HH_NH(p) ((p)->ip6eh.ip6hh->ip6hh_nxt) +#define IPV6_EXTHDR_GET_RAW_HH_HDRLEN(p) ((p)->ip6eh.ip6hh->ip6hh_len) +/* XXX */ + +#define IPV6_EXTHDR_GET_HH_NH(p) IPV6_EXTHDR_GET_RAW_HH_NH((p)) +#define IPV6_EXTHDR_GET_HH_HDRLEN(p) IPV6_EXTHDR_GET_RAW_HH_HDRLEN((p)) +/* XXX */ + +typedef struct IPV6DstOptsHdr_ +{ + uint8_t ip6dh_nxt; /* next header */ + uint8_t ip6dh_len; /* header length in units of 8 bytes, not + including first 8 bytes. */ +} __attribute__((__packed__)) IPV6DstOptsHdr; + +#define IPV6_EXTHDR_GET_RAW_DH1_NH(p) ((p)->ip6eh.ip6dh1->ip6dh_nxt) +#define IPV6_EXTHDR_GET_RAW_DH1_HDRLEN(p) ((p)->ip6eh.ip6dh1->ip6dh_len) +/* XXX */ + +#define IPV6_EXTHDR_GET_DH1_NH(p) IPV6_EXTHDR_GET_RAW_DH1_NH((p)) +#define IPV6_EXTHDR_GET_DH1_HDRLEN(p) IPV6_EXTHDR_GET_RAW_DH1_HDRLEN((p)) +/* XXX */ + +#define IPV6_EXTHDR_GET_RAW_DH2_NH(p) ((p)->ip6eh.ip6dh2->ip6dh_nxt) +#define IPV6_EXTHDR_GET_RAW_DH2_HDRLEN(p) ((p)->ip6eh.ip6dh2->ip6dh_len) +/* XXX */ + +#define IPV6_EXTHDR_GET_DH2_NH(p) IPV6_EXTHDR_GET_RAW_DH2_NH((p)) +#define IPV6_EXTHDR_GET_DH2_HDRLEN(p) IPV6_EXTHDR_GET_RAW_DH2_HDRLEN((p)) +/* XXX */ + +typedef struct IPV6GenOptHdr_ +{ + uint8_t type; + uint8_t next; + uint8_t len; + uint8_t *data; +} IPV6GenOptHdr; + +typedef struct IPV6ExtHdrs_ +{ + const IPV6FragHdr *ip6fh; + /* In fh_offset we 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 */ + uint16_t fh_offset; + + const IPV6RouteHdr *ip6rh; + const IPV6AuthHdr *ip6ah; + const IPV6EspHdr *ip6eh; + const IPV6DstOptsHdr *ip6dh1; + const IPV6DstOptsHdr *ip6dh2; + const IPV6HopOptsHdr *ip6hh; + + /* Hop-By-Hop options */ + IPV6OptHAO ip6hh_opt_hao; + IPV6OptRA ip6hh_opt_ra; + IPV6OptJumbo ip6hh_opt_jumbo; + /* Dest Options 1 */ + IPV6OptHAO ip6dh1_opt_hao; + IPV6OptRA ip6dh1_opt_ra; + IPV6OptJumbo ip6dh1_opt_jumbo; + /* Dest Options 2 */ + IPV6OptHAO ip6dh2_opt_hao; + IPV6OptRA ip6dh2_opt_ra; + IPV6OptJumbo ip6dh2_opt_jumbo; + + IPV6GenOptHdr ip6_exthdrs[IPV6_MAX_OPT]; + uint8_t ip6_exthdrs_cnt; + +} IPV6ExtHdrs; + +#define IPV6_EXTHDR_FH(p) (p)->ip6eh.ip6fh +#define IPV6_EXTHDR_RH(p) (p)->ip6eh.ip6rh +#define IPV6_EXTHDR_AH(p) (p)->ip6eh.ip6ah +#define IPV6_EXTHDR_EH(p) (p)->ip6eh.ip6eh +#define IPV6_EXTHDR_DH1(p) (p)->ip6eh.ip6dh1 +#define IPV6_EXTHDR_DH2(p) (p)->ip6eh.ip6dh2 +#define IPV6_EXTHDR_HH(p) (p)->ip6eh.ip6hh + +#define IPV6_EXTHDR_HH_HAO(p) (p)->ip6eh.ip6hh_opt_hao +#define IPV6_EXTHDR_DH1_HAO(p) (p)->ip6eh.ip6dh1_opt_hao +#define IPV6_EXTHDR_DH2_HAO(p) (p)->ip6eh.ip6dh2_opt_hao +#define IPV6_EXTHDR_HH_RA(p) (p)->ip6eh.ip6hh_opt_ra +#define IPV6_EXTHDR_DH1_RA(p) (p)->ip6eh.ip6dh1_opt_ra +#define IPV6_EXTHDR_DH2_RA(p) (p)->ip6eh.ip6dh2_opt_ra +#define IPV6_EXTHDR_HH_JUMBO(p) (p)->ip6eh.ip6hh_opt_jumbo +#define IPV6_EXTHDR_DH1_JUMBO(p) (p)->ip6eh.ip6dh1_opt_jumbo +#define IPV6_EXTHDR_DH2_JUMBO(p) (p)->ip6eh.ip6dh2_opt_jumbo + +#define IPV6_EXTHDR_SET_FH(p,pkt) IPV6_EXTHDR_FH((p)) = (IPV6FragHdr *)pkt +#define IPV6_EXTHDR_ISSET_FH(p) (IPV6_EXTHDR_FH((p)) != NULL) +#define IPV6_EXTHDR_SET_RH(p,pkt) IPV6_EXTHDR_RH((p)) = (IPV6RouteHdr *)pkt +#define IPV6_EXTHDR_ISSET_RH(p) (IPV6_EXTHDR_RH((p)) != NULL) +#define IPV6_EXTHDR_SET_AH(p,pkt) IPV6_EXTHDR_AH((p)) = (IPV6AuthHdr *)pkt +#define IPV6_EXTHDR_ISSET_AH(p) (IPV6_EXTHDR_AH((p)) != NULL) +#define IPV6_EXTHDR_SET_EH(p,pkt) IPV6_EXTHDR_EH((p)) = (IPV6EspHdr *)pkt +#define IPV6_EXTHDR_ISSET_EH(p) (IPV6_EXTHDR_EH((p)) != NULL) +#define IPV6_EXTHDR_SET_DH1(p,pkt) IPV6_EXTHDR_DH1((p)) = (IPV6DstOptsHdr *)pkt +#define IPV6_EXTHDR_ISSET_DH1(p) (IPV6_EXTHDR_DH1((p)) != NULL) +#define IPV6_EXTHDR_SET_DH2(p,pkt) IPV6_EXTHDR_DH2((p)) = (IPV6DstOptsHdr *)pkt +#define IPV6_EXTHDR_ISSET_DH2(p) (IPV6_EXTHDR_DH2((p)) != NULL) +#define IPV6_EXTHDR_SET_HH(p,pkt) IPV6_EXTHDR_HH((p)) = (IPV6HopOptsHdr *)pkt +#define IPV6_EXTHDR_ISSET_HH(p) (IPV6_EXTHDR_HH((p)) != NULL) + +void DecodeIPV6RegisterTests(void); + +#endif /* __DECODE_IPV6_H__ */ + |