ICMPv6: Add the IPv6-Only flag

[tcpdump] / ip6.h

diff --git a/ip6.h b/ip6.h
index 35f12e42764b8de3285f16c13f3102b810d2b1e6..b5058a48e8df4ea92d0dc40ca75eab406d55931f 100644 (file)
--- a/ip6.h
+++ b/ip6.h
@@ -83,9 +83,9 @@ struct ip6_hdr {
                } ip6_un1;
                nd_uint8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
        } ip6_ctlun;
-       struct in6_addr ip6_src;        /* source address */
-       struct in6_addr ip6_dst;        /* destination address */
-} UNALIGNED;
+       nd_ipv6 ip6_src;        /* source address */
+       nd_ipv6 ip6_dst;        /* destination address */
+};
 
 #define ip6_vfc                ip6_ctlun.ip6_un2_vfc
 #define IP6_VERSION(ip6_hdr)   ((EXTRACT_U_1((ip6_hdr)->ip6_vfc) & 0xf0) >> 4)
@@ -111,21 +111,21 @@ struct ip6_hdr {
 struct ip6_ext {
        nd_uint8_t ip6e_nxt;
        nd_uint8_t ip6e_len;
-} UNALIGNED;
+};
 
 /* Hop-by-Hop options header */
 struct ip6_hbh {
        nd_uint8_t ip6h_nxt;    /* next header */
        nd_uint8_t ip6h_len;    /* length in units of 8 octets */
        /* followed by options */
-} UNALIGNED;
+};
 
 /* Destination options header */
 struct ip6_dest {
        nd_uint8_t ip6d_nxt;    /* next header */
        nd_uint8_t ip6d_len;    /* length in units of 8 octets */
        /* followed by options */
-} UNALIGNED;
+};
 
 /* http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml */
 
@@ -170,10 +170,11 @@ struct ip6_rthdr {
        nd_uint8_t  ip6r_type;          /* routing type */
        nd_uint8_t  ip6r_segleft;       /* segments left */
        /* followed by routing type specific data */
-} UNALIGNED;
+};
 
 #define IPV6_RTHDR_TYPE_0 0
 #define IPV6_RTHDR_TYPE_2 2
+#define IPV6_RTHDR_TYPE_4 4
 
 /* Type 0 Routing header */
 /* Also used for Type 2 */
@@ -183,7 +184,22 @@ struct ip6_rthdr0 {
        nd_uint8_t  ip6r0_type;         /* always zero */
        nd_uint8_t  ip6r0_segleft;      /* segments left */
        nd_uint32_t ip6r0_reserved;     /* reserved field */
-       struct in6_addr ip6r0_addr[1];  /* up to 23 addresses */
+       nd_ipv6     ip6r0_addr[1];      /* up to 23 addresses */
+};
+
+/**
+ * Type 4 Routing header
+ * known as Segment Routing Header 'SRH'
+ */
+struct ip6_srh {
+       nd_uint8_t      srh_nxt;                /* next header */
+       nd_uint8_t      srh_len;                /* length in units of 8 octets */
+       nd_uint8_t      srh_type;               /* Routing Type 4 */
+       nd_uint8_t      srh_segleft;            /* segments left */
+       nd_uint8_t      srh_last_ent;           /* Last Entry*/
+       nd_uint8_t      srh_flags;              /* Flags */
+       nd_uint16_t     srh_tag;                /* Tag */
+       nd_ipv6         srh_segments[1];        /* SRH segments list*/
 };
 
 /* Fragment header */
@@ -192,7 +208,7 @@ struct ip6_frag {
        nd_uint8_t  ip6f_reserved;      /* reserved field */
        nd_uint16_t ip6f_offlg;         /* offset, reserved, and flag */
        nd_uint32_t ip6f_ident;         /* identification */
-} UNALIGNED;
+};
 
 #define IP6F_OFF_MASK          0xfff8  /* mask out offset from ip6f_offlg */
 #define IP6F_RESERVED_MASK     0x0006  /* reserved bits in ip6f_offlg */