resolved: introduce dns_transaction_retry() and use it everywhere
The code to retry transactions has been used over and over again, simplify it by replacing it by a new function.
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@ -336,6 +336,21 @@ static int dns_transaction_pick_server(DnsTransaction *t) {
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return 1;
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}
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static void dns_transaction_retry(DnsTransaction *t) {
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int r;
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assert(t);
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log_debug("Retrying transaction %" PRIu16 ".", t->id);
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/* Before we try again, switch to a new server. */
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dns_scope_next_dns_server(t->scope);
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r = dns_transaction_go(t);
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if (r < 0)
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dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
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}
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static int on_stream_complete(DnsStream *s, int error) {
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_cleanup_(dns_packet_unrefp) DnsPacket *p = NULL;
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DnsTransaction *t;
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@ -645,13 +660,7 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
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log_debug("Server returned error: %s", dns_rcode_to_string(DNS_PACKET_RCODE(p)));
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dns_server_packet_failed(t->server, t->current_features);
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r = dns_transaction_go(t);
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if (r < 0) {
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dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
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return;
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}
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dns_transaction_retry(t);
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return;
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} else
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dns_server_packet_received(t->server, t->current_features, ts - t->start_usec, p->size);
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@ -691,13 +700,7 @@ void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p) {
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}
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/* On DNS, couldn't send? Try immediately again, with a new server */
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dns_scope_next_dns_server(t->scope);
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r = dns_transaction_go(t);
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if (r < 0) {
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dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
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return;
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}
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dns_transaction_retry(t);
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}
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return;
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@ -833,7 +836,6 @@ static int dns_transaction_emit_udp(DnsTransaction *t) {
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static int on_transaction_timeout(sd_event_source *s, usec_t usec, void *userdata) {
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DnsTransaction *t = userdata;
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int r;
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assert(s);
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assert(t);
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@ -862,13 +864,7 @@ static int on_transaction_timeout(sd_event_source *s, usec_t usec, void *userdat
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log_debug("Timeout reached on transaction %" PRIu16 ".", t->id);
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/* ...and try again with a new server */
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dns_scope_next_dns_server(t->scope);
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r = dns_transaction_go(t);
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if (r < 0)
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dns_transaction_complete(t, DNS_TRANSACTION_RESOURCES);
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dns_transaction_retry(t);
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return 0;
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}
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