diff --git a/src/resolve/resolved-dns-scope.c b/src/resolve/resolved-dns-scope.c index 5129412604e..e8c6108924a 100644 --- a/src/resolve/resolved-dns-scope.c +++ b/src/resolve/resolved-dns-scope.c @@ -125,18 +125,17 @@ void dns_scope_next_dns_server(DnsScope *s) { manager_next_dns_server(s->manager); } -int dns_scope_emit(DnsScope *s, DnsTransaction *t, DnsPacket *p, DnsServer **server) { - DnsServer *srv = NULL; +int dns_scope_emit(DnsScope *s, int fd, DnsPacket *p) { union in_addr_union addr; int ifindex = 0, r; int family; uint16_t port; uint32_t mtu; - int fd; assert(s); assert(p); assert(p->protocol == s->protocol); + assert((s->protocol == DNS_PROTOCOL_DNS) != (fd < 0)); if (s->link) { mtu = s->link->mtu; @@ -154,14 +153,6 @@ int dns_scope_emit(DnsScope *s, DnsTransaction *t, DnsPacket *p, DnsServer **ser if (p->size + UDP_PACKET_HEADER_SIZE > mtu) return -EMSGSIZE; - fd = transaction_dns_fd(t, &srv); - if (fd < 0) - return fd; - - family = srv->family; - addr = srv->address; - port = 53; - } else if (s->protocol == DNS_PROTOCOL_LLMNR) { if (DNS_PACKET_QDCOUNT(p) > 1) @@ -190,9 +181,6 @@ int dns_scope_emit(DnsScope *s, DnsTransaction *t, DnsPacket *p, DnsServer **ser if (r < 0) return r; - if (server) - *server = srv; - return 1; } @@ -688,7 +676,7 @@ static int on_conflict_dispatch(sd_event_source *es, usec_t usec, void *userdata return 0; } - r = dns_scope_emit(scope, NULL, p, NULL); + r = dns_scope_emit(scope, -1, p); if (r < 0) log_debug_errno(r, "Failed to send conflict packet: %m"); } diff --git a/src/resolve/resolved-dns-scope.h b/src/resolve/resolved-dns-scope.h index 9d08bc32596..29479ad5509 100644 --- a/src/resolve/resolved-dns-scope.h +++ b/src/resolve/resolved-dns-scope.h @@ -65,7 +65,7 @@ struct DnsScope { int dns_scope_new(Manager *m, DnsScope **ret, Link *l, DnsProtocol p, int family); DnsScope* dns_scope_free(DnsScope *s); -int dns_scope_emit(DnsScope *s, DnsTransaction *t, DnsPacket *p, DnsServer **server); +int dns_scope_emit(DnsScope *s, int fd, DnsPacket *p); int dns_scope_tcp_socket(DnsScope *s, int family, const union in_addr_union *address, uint16_t port, DnsServer **server); int dns_scope_udp_dns_socket(DnsScope *s, DnsServer **server); diff --git a/src/resolve/resolved-dns-transaction.c b/src/resolve/resolved-dns-transaction.c index c4e055dfd85..956c2e99732 100644 --- a/src/resolve/resolved-dns-transaction.c +++ b/src/resolve/resolved-dns-transaction.c @@ -460,33 +460,33 @@ static int on_dns_packet(sd_event_source *s, int fd, uint32_t revents, void *use return 0; } -int transaction_dns_fd(DnsTransaction *t, DnsServer **_server) { - DnsServer *server; +static int dns_transaction_emit(DnsTransaction *t) { int r; assert(t); - assert(t->scope); - assert(t->scope->manager); - if (t->dns_fd >= 0) - return t->dns_fd; + if (t->scope->protocol == DNS_PROTOCOL_DNS && !t->server) { + DnsServer *server = NULL; + _cleanup_close_ int fd = -1; - t->dns_fd = dns_scope_udp_dns_socket(t->scope, &server); - if (t->dns_fd < 0) - return t->dns_fd; + fd = dns_scope_udp_dns_socket(t->scope, &server); + if (fd < 0) + return fd; - r = sd_event_add_io(t->scope->manager->event, &t->dns_event_source, t->dns_fd, EPOLLIN, on_dns_packet, t); + r = sd_event_add_io(t->scope->manager->event, &t->dns_event_source, fd, EPOLLIN, on_dns_packet, t); + if (r < 0) + return r; + + t->dns_fd = fd; + fd = -1; + t->server = dns_server_ref(server); + } + + r = dns_scope_emit(t->scope, t->dns_fd, t->sent); if (r < 0) - goto fail; + return r; - if (_server) - *_server = server; - - return t->dns_fd; - -fail: - t->dns_fd = safe_close(t->dns_fd); - return r; + return 0; } static int on_transaction_timeout(sd_event_source *s, usec_t usec, void *userdata) { @@ -574,7 +574,6 @@ int dns_transaction_go(DnsTransaction *t) { } t->n_attempts++; - t->server = dns_server_unref(t->server); t->received = dns_packet_unref(t->received); t->cached = dns_answer_unref(t->cached); t->cached_rcode = 0; @@ -654,13 +653,9 @@ int dns_transaction_go(DnsTransaction *t) { * always be made via TCP on LLMNR */ r = dns_transaction_open_tcp(t); } else { - DnsServer *server; - /* Try via UDP, and if that fails due to large size try via TCP */ - r = dns_scope_emit(t->scope, t, t->sent, &server); - if (r >= 0) - t->server = dns_server_ref(server); - else if (r == -EMSGSIZE) + r = dns_transaction_emit(t); + if (r == -EMSGSIZE) r = dns_transaction_open_tcp(t); } if (r == -ESRCH) { diff --git a/src/resolve/resolved-dns-transaction.h b/src/resolve/resolved-dns-transaction.h index ab4db0612fd..a8f4267bc84 100644 --- a/src/resolve/resolved-dns-transaction.h +++ b/src/resolve/resolved-dns-transaction.h @@ -92,8 +92,6 @@ int dns_transaction_go(DnsTransaction *t); void dns_transaction_process_reply(DnsTransaction *t, DnsPacket *p); void dns_transaction_complete(DnsTransaction *t, DnsTransactionState state); -int transaction_dns_fd(DnsTransaction *t, DnsServer **server); - const char* dns_transaction_state_to_string(DnsTransactionState p) _const_; DnsTransactionState dns_transaction_state_from_string(const char *s) _pure_;