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Merge pull request #360 from getdnsapi/bugfix/private_ecs_with_family 

Bugfix #359: edns_client_subnet_private should set family
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wtoorop 2017-11-28 16:59:37 +01:00 committed by GitHub
parent 17d23ddb99 6afb02b2f1
commit b105faad7d
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2 changed files with 17 additions and 9 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
* 201?-??-??: Version 1.?.?
* Bugfix #359: edns_client_subnet_private should set family
Thanks Daniel Areiza
* 2017-11-11: Version 1.2.1
* Handle more I/O error cases. Also, when an I/O error does occur,
never stop listening (with servers), and

22
src/stub.c
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@ -151,15 +151,19 @@ calc_new_cookie(getdns_upstream *upstream, uint8_t *cookie)
static getdns_return_t
attach_edns_client_subnet_private(getdns_network_req *req)
{
/* see
* https://tools.ietf.org/html/draft-ietf-dnsop-edns-client-subnet-04#section-6 */
/* all-zeros is a request to not leak the data further: */
/* "\x00\x00" FAMILY: 0 (because no address) */
/* "\x00" SOURCE PREFIX-LENGTH: 0 */
/* "\x00"; SCOPE PREFIX-LENGTH: 0 */
return _getdns_network_req_add_upstream_option(req,
GLDNS_EDNS_CLIENT_SUBNET,
4, NULL);
/* see https://tools.ietf.org/html/rfc7871#section-7.1.2
* all-zeros is a request to not leak the data further:
* A two byte FAMILY field is a SHOULD even when SOURCE
* and SCOPE are 0.
* "\x00\x02" FAMILY: 2 for IPv6 upstreams in network byte order, or
* "\x00\x01" FAMILY: 1 for IPv4 upstreams in network byte order, then:
* "\x00" SOURCE PREFIX-LENGTH: 0
* "\x00"; SCOPE PREFIX-LENGTH: 0
*/
return _getdns_network_req_add_upstream_option(
req, GLDNS_EDNS_CLIENT_SUBNET, 4,
( req->upstream->addr.ss_family == AF_INET6
? "\x00\x02\x00\x00" : "\x00\x01\x00\x00" ));
}
static getdns_return_t