1 files changed, 103 insertions, 0 deletions
diff --git a/wsutil/inet_ipv6.h b/wsutil/inet_ipv6.h
new file mode 100644
index 00000000..0cd70394
--- /dev/null
+++ b/wsutil/inet_ipv6.h
@@ -0,0 +1,103 @@
+/** @file
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef __INET_IPV6_H__
+#define __INET_IPV6_H__
+
+#include <inttypes.h>
+#include <stdbool.h>
+
+#define IPv6_ADDR_SIZE  16
+
+#define IPv6_HDR_SIZE           40
+#define IPv6_FRAGMENT_HDR_SIZE  8
+
+typedef struct e_in6_addr {
+    uint8_t bytes[16];           /* 128 bit IPv6 address */
+} ws_in6_addr;
+
+/*
+ * Definition for internet protocol version 6.
+ * RFC 2460
+ */
+struct ws_ip6_hdr {
+    uint32_t    ip6h_vc_flow;           /* version, class, flow */
+    uint16_t    ip6h_plen;              /* payload length */
+    uint8_t     ip6h_nxt;               /* next header */
+    uint8_t     ip6h_hlim;              /* hop limit */
+    ws_in6_addr ip6h_src;               /* source address */
+    ws_in6_addr ip6h_dst;               /* destination address */
+};
+
+/*
+ * Extension Headers
+ */
+
+struct ip6_ext {
+    unsigned char ip6e_nxt;
+    unsigned char ip6e_len;
+};
+
+/* Routing header */
+struct ip6_rthdr {
+    uint8_t ip6r_nxt;        /* next header */
+    uint8_t ip6r_len;        /* length in units of 8 octets */
+    uint8_t ip6r_type;       /* routing type */
+    uint8_t ip6r_segleft;    /* segments left */
+    /* followed by routing type specific data */
+};
+
+/* Type 0 Routing header */
+struct ip6_rthdr0 {
+    uint8_t ip6r0_nxt;       /* next header */
+    uint8_t ip6r0_len;       /* length in units of 8 octets */
+    uint8_t ip6r0_type;      /* always zero */
+    uint8_t ip6r0_segleft;   /* segments left */
+    uint8_t ip6r0_reserved;  /* reserved field */
+    uint8_t ip6r0_slmap[3];  /* strict/loose bit map */
+    /* followed by up to 127 addresses */
+    ws_in6_addr ip6r0_addr[1];
+};
+
+/* Fragment header */
+struct ip6_frag {
+    uint8_t ip6f_nxt;       /* next header */
+    uint8_t ip6f_reserved;  /* reserved field */
+    uint16_t ip6f_offlg;     /* offset, reserved, and flag */
+    uint32_t ip6f_ident;     /* identification */
+};
+
+#define IP6F_OFF_MASK           0xfff8 /* mask out offset from _offlg */
+#define IP6F_RESERVED_MASK      0x0006 /* reserved bits in ip6f_offlg */
+#define IP6F_MORE_FRAG          0x0001 /* more-fragments flag */
+
+
+/**
+ * Unicast Scope
+ * Note that we must check topmost 10 bits only, not 16 bits (see RFC2373).
+ */
+static inline bool in6_addr_is_linklocal(const ws_in6_addr *a)
+{
+    return (a->bytes[0] == 0xfe) && ((a->bytes[1] & 0xc0) == 0x80);
+}
+
+static inline bool in6_addr_is_sitelocal(const ws_in6_addr *a)
+{
+    return (a->bytes[0] == 0xfe) && ((a->bytes[1] & 0xc0) == 0xc0);
+}
+
+/**
+ * Multicast
+ */
+static inline bool in6_addr_is_multicast(const ws_in6_addr *a)
+{
+    return a->bytes[0] == 0xff;
+}
+
+#endif