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DNS: Chain Query requests 

https://tools.ietf.org/html/draft-ietf-dnsop-edns-chain-query

Bug:11759
Change-Id: I631bf381dbfed956285855083a00a91f54a3c39c
Reviewed-on: https://code.wireshark.org/review/12064
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>
This commit is contained in:
Alexis La Goutte 2015-11-23 11:59:10 +01:00 committed by Michael Mann
parent bf34d531f9
commit ed0cc4319c
1 changed files with 16 additions and 1 deletions
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17
epan/dissectors/packet-dns.c
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@ -307,6 +307,7 @@ static int hf_dns_opt_cookie_client = -1;
static int hf_dns_opt_cookie_server = -1;
static int hf_dns_opt_edns_tcp_keepalive_timeout = -1;
static int hf_dns_opt_padding = -1;
static int hf_dns_opt_chain_fqdn = -1;
static int hf_dns_nsec3_algo = -1;
static int hf_dns_nsec3_flags = -1;
static int hf_dns_nsec3_flag_optout = -1;
@ -597,6 +598,7 @@ typedef struct _dns_conv_info_t {
#define O_COOKIE 10 /* draft-ietf-dnsop-cookie */
#define O_EDNS_TCP_KA 11 /* draft-ietf-dnsop-edns-tcp-keepalive */
#define O_PADDING 12 /* draft-ietf-dprive-edns0-padding */
#define O_CHAIN 13 /* draft-ietf-dnsop-edns-chain-query */
static const true_false_string tfs_flags_response = {
"Message is a response",
@ -1031,7 +1033,8 @@ static const value_string edns0_opt_code_vals[] = {
{O_COOKIE, "COOKIE"},
{O_EDNS_TCP_KA, "EDNS TCP Keepalive"},
{O_PADDING, "PADDING"},
{0, NULL}
{O_CHAIN, "CHAIN"},
{0, NULL}
};
/* DNS-Based Authentication of Named Entities (DANE) Parameters
http://www.iana.org/assignments/dane-parameters (last updated 2014-04-23)
@ -2788,6 +2791,13 @@ dissect_dns_answer(tvbuff_t *tvb, int offsetx, int dns_data_offset,
proto_tree_add_item(rropt_tree, hf_dns_opt_padding, tvb, cur_offset, optlen, ENC_NA);
cur_offset += optlen;
rropt_len -= optlen;
break;
case O_CHAIN:
if(optlen){
proto_tree_add_item(rropt_tree, hf_dns_opt_chain_fqdn, tvb, cur_offset, optlen, ENC_ASCII|ENC_NA);
}
cur_offset += optlen;
rropt_len -= optlen;
break;
default:
cur_offset += optlen;
@ -5080,6 +5090,11 @@ proto_register_dns(void)
FT_BYTES, BASE_NONE, NULL, 0x0,
"The PADDING octets MUST be set to 0x00", HFILL }},
{ &hf_dns_opt_chain_fqdn,
{ "Closest Trust Point", "dns.opt.chain.fqdn",
FT_STRING, BASE_NONE, NULL, 0x0,
"A variable length Fully Qualified Domain Name (FQDN) in DNS wire format of the requested start point of the chain", HFILL }},
{ &hf_dns_count_questions,
{ "Questions", "dns.count.queries",
FT_UINT16, BASE_DEC, NULL, 0x0,