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resolved: automatically downgrade reply bits on send

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Doesn't really change anything, but makes things a bit simpler to read.
This commit is contained in:
Lennart Poettering 2017-02-14 19:25:47 +01:00
parent ce7c8b20df
commit 941dd29450
1 changed files with 13 additions and 4 deletions
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17
src/resolve/resolved-dns-stub.c
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@ -94,9 +94,18 @@ static int dns_stub_finish_reply_packet(
assert(p);
/* If the client didn't do EDNS, clamp the rcode to 4 bit */
if (!add_opt && rcode > 0xF)
rcode = DNS_RCODE_SERVFAIL;
if (!add_opt) {
/* If the client can't to EDNS0, don't do DO either */
edns0_do = false;
/* If the client didn't do EDNS, clamp the rcode to 4 bit */
if (rcode > 0xF)
rcode = DNS_RCODE_SERVFAIL;
}
/* Don't set the AD bit unless DO is on, too */
if (!edns0_do)
ad = false;
DNS_PACKET_HEADER(p)->id = id;
@ -214,7 +223,7 @@ static void dns_stub_query_complete(DnsQuery *q) {
q->answer_rcode,
!!q->request_dns_packet->opt,
DNS_PACKET_DO(q->request_dns_packet),
DNS_PACKET_DO(q->request_dns_packet) && dns_query_fully_authenticated(q));
dns_query_fully_authenticated(q));
if (r < 0) {
log_debug_errno(r, "Failed to finish reply packet: %m");
break;