Adding upstream version 1:7.0.3.upstream/1%7.0.3

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 245 insertions, 0 deletions

diff --git a/src/decode-ipv6.h b/src/decode-ipv6.h
new file mode 100644
index 0000000..651939a
--- /dev/null
+++ b/src/decode-ipv6.h
@@ -0,0 +1,245 @@
+/* Copyright (C) 2007-2022 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;
+} 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)        ((SCNtohl((ip6h)->s_ip6_flow) & 0x0FF00000) >> 20)
+#define IPV6_GET_RAW_FLOW(ip6h)         (SCNtohl((ip6h)->s_ip6_flow) & 0x000FFFFF)
+#define IPV6_GET_RAW_NH(ip6h)           ((ip6h)->s_ip6_nxt)
+#define IPV6_GET_RAW_PLEN(ip6h)         (SCNtohs((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)
+#define IPV6_SET_EXTHDRS_LEN(p,len)     (p)->ip6vars.exthdrs_len = (len)
+
+
+/* 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))
+
+#define IPV6_GET_L4PROTO(p) \
+    ((p)->ip6vars.l4proto)
+#define IPV6_GET_EXTHDRS_LEN(p) \
+    ((p)->ip6vars.exthdrs_len)
+
+/** \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 l4proto;       /**< the proto after the extension headers
+                            *   store while decoding so we don't have
+                            *   to loop through the exthdrs all the time */
+    uint16_t exthdrs_len;  /**< length of the exthdrs */
+} IPV6Vars;
+
+#define CLEAR_IPV6_PACKET(p) do { \
+    (p)->ip6h = NULL; \
+    (p)->ip6vars.l4proto = 0; \
+    (p)->ip6vars.exthdrs_len = 0; \
+    memset(&(p)->ip6eh, 0x00, sizeof((p)->ip6eh)); \
+} 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_FH_NH(p)            (p)->ip6eh.fh_nh
+#define IPV6_EXTHDR_GET_FH_OFFSET(p)        (p)->ip6eh.fh_offset
+#define IPV6_EXTHDR_GET_FH_FLAG(p)          (p)->ip6eh.fh_more_frags_set
+#define IPV6_EXTHDR_GET_FH_ID(p)            (p)->ip6eh.fh_id
+
+/* 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 */
+} __attribute__((__packed__)) IPV6RouteHdr;
+
+
+/* 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;
+
+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;
+
+typedef struct IPV6GenOptHdr_
+{
+    uint8_t type;
+    uint8_t next;
+    uint8_t len;
+    uint8_t *data;
+}   IPV6GenOptHdr;
+
+typedef struct IPV6ExtHdrs_
+{
+    bool rh_set;
+    uint8_t rh_type;
+
+    bool fh_set;
+    bool fh_more_frags_set;
+    uint8_t fh_nh;
+
+    uint8_t fh_prev_nh;
+    uint16_t fh_prev_hdr_offset;
+
+    uint16_t fh_header_offset;
+    uint16_t fh_data_offset;
+    uint16_t fh_data_len;
+
+    /* 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;
+    uint32_t fh_id;
+
+} IPV6ExtHdrs;
+
+#define IPV6_EXTHDR_SET_FH(p)       (p)->ip6eh.fh_set = true
+#define IPV6_EXTHDR_ISSET_FH(p)     (p)->ip6eh.fh_set
+#define IPV6_EXTHDR_SET_RH(p)       (p)->ip6eh.rh_set = true
+#define IPV6_EXTHDR_ISSET_RH(p)     (p)->ip6eh.rh_set
+
+void DecodeIPV6RegisterTests(void);
+
+#endif /* __DECODE_IPV6_H__ */