This attached patch adds support for MLD v2 report messages decoding.
That kind of message are send when you add an ipv6 address on a multicast
enabled linux box(at least that's how i found that they weren't decoded).
This patch is based on MLD v2 for ipv6 draft: draft-vida-mld-v2-03.txt
--
Projet IDsA
IRISA-INRIA, Campus de Beaulieu, 35042 Rennes cedex, France
Tél: +33 (0) 2 99 84 71 00, Fax: +33 (0) 2 99 84 71 71
Index: packet-icmpv6.c
===================================================================
RCS file: /cvsroot/ethereal/packet-icmpv6.c,v
retrieving revision 1.73
diff -r1.73 packet-icmpv6.c
88a89
> static gint ett_multicastRR = -1;
935a937,996
> static const value_string mldrv2ModesNames[] = {
> { 1, "Include" },
> { 2, "Exclude" },
> { 3, "Changed to include" },
> { 4, "Changed to exclude" },
> { 5, "Allow new sources" },
> { 6, "Block old sources" },
> { 0, NULL }
> };
>
> static void
> dissect_mldrv2( tvbuff_t *tvb, guint32 offset, guint16 count, proto_tree *tree )
> {
> proto_tree *sub_tree;
> proto_item *tf;
>
> guint8 recordType, auxDataLen;
> guint32 sourceNb, recordSize, localOffset;
> struct e_in6_addr addr;
>
> for( ; count; count--, offset += recordSize ) {
> localOffset = offset;
> recordType = tvb_get_guint8( tvb, localOffset );
> localOffset += 1;
> auxDataLen = tvb_get_guint8( tvb, localOffset );
> localOffset += 1;
> sourceNb = tvb_get_ntohs( tvb, localOffset );
> localOffset += 2;
> recordSize = 4 + 16 + (16 * sourceNb) + (auxDataLen * 4);
>
> tvb_memcpy(tvb, (guint8 *)&addr, localOffset, sizeof(addr) );
> tf = proto_tree_add_text( tree, tvb, offset, recordSize,
> #ifdef INET6
> "%s: %s (%s)", val_to_str(recordType, mldrv2ModesNames,"Unknown mode"),
> get_hostname6(&addr), ip6_to_str(&addr)
> #else
> "%s: %s", val_to_str(recordType, mldrv2ModesNames,"Unknown mode"),
> ip6_to_str(&addr)
> #endif
> );
> sub_tree = proto_item_add_subtree(tf, ett_multicastRR);
>
> proto_tree_add_text( sub_tree, tvb, offset, 1, "Mode: %s",
> val_to_str(recordType, mldrv2ModesNames,"Unknown mode") );
> proto_tree_add_text( sub_tree, tvb, offset+1, 1, "Aux data len: %u", auxDataLen * 4);
> proto_tree_add_text( sub_tree, tvb, localOffset, 16, "Multicast Address: %s", ip6_to_str(&addr) );
> localOffset += 16;
>
> for( ; sourceNb; sourceNb--, localOffset += 16 ) {
> tvb_memcpy(tvb, (guint8 *)&addr, localOffset, sizeof(addr) );
> proto_tree_add_text( sub_tree, tvb, localOffset, 16,
> #ifdef INET6
> "Source Address: %s (%s)", get_hostname6(&addr), ip6_to_str(&addr) );
> #else
> "Source Address: %s", ip6_to_str(&addr) );
> #endif
> }
> }
> }
>
1129a1191,1195
> case ICMP6_MLDV2_REPORT:
> typename = coltypename = "Multicast Listener Report Message v2";
> codename = "Should always be zero";
> colcodename = NULL;
> break;
1260a1327,1333
> case ICMP6_MLDV2_REPORT: {
> guint16 nbRecords;
>
> nbRecords = tvb_get_ntohs( tvb, offset+4+2 );
> dissect_mldrv2( tvb, offset+4+2+2, nbRecords, icmp6_tree );
> break;
> }
1482a1556
> &ett_multicastRR,
Index: packet-ipv6.h
===================================================================
RCS file: /cvsroot/ethereal/packet-ipv6.h,v
retrieving revision 1.31
diff -r1.31 packet-ipv6.h
220a221
> #define ICMP6_MLDV2_REPORT 206 /* MLD v2 report message : draft-vida-mld-v2-03.txt */
