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resolved: remove redundant conditionalization

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If all protocols are listed there's no point in having the if check.

Follow-up for 8b4198373b976035e0dfc347f50b61eab40c8e00
This commit is contained in:
Lennart Poettering 2020-10-27 18:00:33 +01:00
parent 1ed314087f
commit 8facd1ce4f
1 changed files with 42 additions and 48 deletions
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90
src/resolve/resolved-dns-transaction.c
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@ -1113,60 +1113,54 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
if (r > 0) /* Transaction got restarted... */
return;
if (IN_SET(t->scope->protocol, DNS_PROTOCOL_DNS, DNS_PROTOCOL_LLMNR, DNS_PROTOCOL_MDNS)) {
/* When dealing with protocols other than mDNS only consider responses with
* equivalent query section to the request. For mDNS this check doesn't make
* sense, because the section 6 of RFC6762 states that "Multicast DNS responses MUST NOT
* contain any questions in the Question Section". */
if (t->scope->protocol != DNS_PROTOCOL_MDNS) {
r = dns_packet_is_reply_for(p, t->key);
if (r < 0)
goto fail;
if (r == 0) {
dns_transaction_complete(t, DNS_TRANSACTION_INVALID_REPLY);
return;
}
}
/* Install the answer as answer to the transaction */
dns_answer_unref(t->answer);
t->answer = dns_answer_ref(p->answer);
t->answer_rcode = DNS_PACKET_RCODE(p);
t->answer_dnssec_result = _DNSSEC_RESULT_INVALID;
t->answer_authenticated = false;
r = dns_transaction_fix_rcode(t);
/* When dealing with protocols other than mDNS only consider responses with equivalent query section
* to the request. For mDNS this check doesn't make sense, because the section 6 of RFC6762 states
* that "Multicast DNS responses MUST NOT contain any questions in the Question Section". */
if (t->scope->protocol != DNS_PROTOCOL_MDNS) {
r = dns_packet_is_reply_for(p, t->key);
if (r < 0)
goto fail;
/* Block GC while starting requests for additional DNSSEC RRs */
t->block_gc++;
r = dns_transaction_request_dnssec_keys(t);
t->block_gc--;
/* Maybe the transaction is ready for GC'ing now? If so, free it and return. */
if (!dns_transaction_gc(t))
return;
/* Requesting additional keys might have resulted in
* this transaction to fail, since the auxiliary
* request failed for some reason. If so, we are not
* in pending state anymore, and we should exit
* quickly. */
if (t->state != DNS_TRANSACTION_PENDING)
return;
if (r < 0)
goto fail;
if (r > 0) {
/* There are DNSSEC transactions pending now. Update the state accordingly. */
t->state = DNS_TRANSACTION_VALIDATING;
dns_transaction_close_connection(t);
dns_transaction_stop_timeout(t);
if (r == 0) {
dns_transaction_complete(t, DNS_TRANSACTION_INVALID_REPLY);
return;
}
}
/* Install the answer as answer to the transaction */
dns_answer_unref(t->answer);
t->answer = dns_answer_ref(p->answer);
t->answer_rcode = DNS_PACKET_RCODE(p);
t->answer_dnssec_result = _DNSSEC_RESULT_INVALID;
t->answer_authenticated = false;
r = dns_transaction_fix_rcode(t);
if (r < 0)
goto fail;
/* Block GC while starting requests for additional DNSSEC RRs */
t->block_gc++;
r = dns_transaction_request_dnssec_keys(t);
t->block_gc--;
/* Maybe the transaction is ready for GC'ing now? If so, free it and return. */
if (!dns_transaction_gc(t))
return;
/* Requesting additional keys might have resulted in this transaction to fail, since the auxiliary
* request failed for some reason. If so, we are not in pending state anymore, and we should exit
* quickly. */
if (t->state != DNS_TRANSACTION_PENDING)
return;
if (r < 0)
goto fail;
if (r > 0) {
/* There are DNSSEC transactions pending now. Update the state accordingly. */
t->state = DNS_TRANSACTION_VALIDATING;
dns_transaction_close_connection(t);
dns_transaction_stop_timeout(t);
return;
}
dns_transaction_process_dnssec(t);
return;