static void
dissect_ayiya(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *ayiya_tree;
int offset = 0;
int idlen, siglen, ayiya_len;
guint8 next_header, opcode;
tvbuff_t *payload;
idlen = 1 << tvb_get_bits8(tvb, 0, 4);
siglen = tvb_get_bits8(tvb, 8, 4) * 4;
opcode = tvb_get_bits8(tvb, 20, 4);
next_header = tvb_get_guint8(tvb, 3);
ayiya_len = 8+idlen+siglen;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AYIYA");
if (tree) {
proto_item *ti;
nstime_t tv;
ti = proto_tree_add_protocol_format( tree, proto_ayiya, tvb,
offset, ayiya_len, "AYIYA" );
ayiya_tree = proto_item_add_subtree(ti, ett_ayiya);
proto_tree_add_bits_item(ayiya_tree, hf_id_len, tvb, 0, 4, ENC_BIG_ENDIAN);
proto_tree_add_bits_item(ayiya_tree, hf_id_type, tvb, 4, 4, ENC_BIG_ENDIAN);
proto_tree_add_bits_item(ayiya_tree, hf_sig_len, tvb, 8, 4, ENC_BIG_ENDIAN);
proto_tree_add_bits_item(ayiya_tree, hf_hash_method, tvb, 12, 4, ENC_BIG_ENDIAN);
proto_tree_add_bits_item(ayiya_tree, hf_auth_method, tvb, 16, 4, ENC_BIG_ENDIAN);
proto_tree_add_bits_item(ayiya_tree, hf_opcode, tvb, 20, 4, ENC_BIG_ENDIAN);
proto_tree_add_uint_format(ayiya_tree, hf_next_header, tvb,
3, 1, next_header,
"Next header: %s (0x%02x)",
ipprotostr(next_header), next_header);
tv.secs = tvb_get_ntohl(tvb, 4);
tv.nsecs = 0;
proto_tree_add_time(ayiya_tree, hf_epoch, tvb, 4, 4, &tv);
proto_tree_add_item(ayiya_tree, hf_identity, tvb, 8, idlen, ENC_NA);
proto_tree_add_item(ayiya_tree, hf_signature, tvb, 8+idlen, siglen, ENC_NA);
}
offset = ayiya_len;
switch (opcode) {
case OPCODE_FORWARD:
payload = tvb_new_subset_remaining(tvb, offset);
dissector_try_uint(ip_dissector_table, next_header, payload, pinfo, tree);
break;
}
}
const char *ipv6extprotostr(int proto)
{
if (ipv6_exthdr_check(proto))
return ipprotostr(proto);
return NULL;
}
