mirror of https://github.com/getdnsapi/getdns.git
Embed netreqs in dns_reqs and wire_data in netreqs
TODO: make sure the wire_data buffer is filled with the response
This commit is contained in:
parent
f9a0974e5a
commit
3f046cf573
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@ -1389,9 +1389,9 @@ getdns_context_set_memory_functions(struct getdns_context *context,
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static void
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cancel_dns_req(getdns_dns_req *req)
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{
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getdns_network_req *netreq;
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getdns_network_req *netreq, **netreq_p;
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for (netreq = req->first_req; netreq; netreq = netreq->next)
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for (netreq_p = req->netreqs; (netreq = *netreq_p); netreq_p++)
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if (netreq->unbound_id != -1) {
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ub_cancel(req->context->unbound_ctx,
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netreq->unbound_id);
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@ -1921,12 +1921,12 @@ getdns_context_local_namespace_resolve(
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ldns_rr_list *result_list = NULL;
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host_name_addrs *hnas;
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ldns_rdf *query_name;
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int ipv4 = dnsreq->first_req->request_type == GETDNS_RRTYPE_A ||
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(dnsreq->first_req->next &&
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dnsreq->first_req->next->request_type == GETDNS_RRTYPE_A);
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int ipv6 = dnsreq->first_req->request_type == GETDNS_RRTYPE_AAAA ||
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(dnsreq->first_req->next &&
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dnsreq->first_req->next->request_type == GETDNS_RRTYPE_AAAA);
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int ipv4 = dnsreq->netreqs[0]->request_type == GETDNS_RRTYPE_A ||
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(dnsreq->netreqs[1] &&
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dnsreq->netreqs[1]->request_type == GETDNS_RRTYPE_A);
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int ipv6 = dnsreq->netreqs[0]->request_type == GETDNS_RRTYPE_AAAA ||
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(dnsreq->netreqs[1] &&
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dnsreq->netreqs[1]->request_type == GETDNS_RRTYPE_AAAA);
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if (!ipv4 && !ipv6)
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return GETDNS_RETURN_GENERIC_ERROR;
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@ -272,7 +272,7 @@ static void destroy_chain(struct validation_chain *chain)
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static void
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getdns_get_validation_chain(getdns_dns_req *dns_req, uint64_t *timeout)
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{
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getdns_network_req *netreq = dns_req->first_req;
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getdns_network_req **netreq_p, *netreq;
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struct validation_chain *chain = create_chain(dns_req, timeout);
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if (! chain) {
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@ -280,7 +280,7 @@ getdns_get_validation_chain(getdns_dns_req *dns_req, uint64_t *timeout)
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dns_req, create_getdns_response(dns_req));
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return;
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}
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while (netreq) {
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for (netreq_p = dns_req->netreqs; (netreq = *netreq_p); netreq_p++) {
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size_t i;
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ldns_rr_list *answer = ldns_pkt_answer(netreq->result);
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ldns_rr_list *authority = ldns_pkt_authority(netreq->result);
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@ -296,7 +296,6 @@ getdns_get_validation_chain(getdns_dns_req *dns_req, uint64_t *timeout)
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launch_chain_link_lookup(chain,
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ldns_rdf2str(ldns_rr_rdf(rr, 7)));
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}
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netreq = netreq->next;
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}
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callback_on_complete_chain(chain);
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}
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@ -81,10 +81,10 @@ handle_network_request_error(getdns_network_req * netreq, int err)
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void
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priv_getdns_check_dns_req_complete(getdns_dns_req *dns_req)
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{
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getdns_network_req *netreq;
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getdns_network_req **netreq_p, *netreq;
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int results_found = 0;
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for (netreq = dns_req->first_req; netreq; netreq = netreq->next)
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for (netreq_p = dns_req->netreqs; (netreq = *netreq_p); netreq_p++)
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if (netreq->state != NET_REQ_FINISHED &&
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netreq->state != NET_REQ_CANCELED)
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return;
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@ -168,7 +168,7 @@ getdns_general_ns(getdns_context *context, getdns_eventloop *loop,
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getdns_callback_t callbackfn, int usenamespaces)
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{
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getdns_return_t r = GETDNS_RETURN_GOOD;
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getdns_network_req *netreq;
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getdns_network_req *netreq, **netreq_p;
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getdns_dns_req *req;
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getdns_dict *localnames_response;
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size_t i;
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@ -201,7 +201,9 @@ getdns_general_ns(getdns_context *context, getdns_eventloop *loop,
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if (!usenamespaces)
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/* issue all network requests */
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for (netreq = req->first_req; !r && netreq; netreq = netreq->next)
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for ( netreq_p = req->netreqs
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; !r && (netreq = *netreq_p)
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; netreq_p++)
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r = submit_network_request(netreq);
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else for (i = 0; i < context->namespace_count; i++) {
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@ -221,11 +223,10 @@ getdns_general_ns(getdns_context *context, getdns_eventloop *loop,
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if this means we go onto the next namespace instead
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of returning */
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r = GETDNS_RETURN_GOOD;
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netreq = req->first_req;
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while (!r && netreq) {
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for ( netreq_p = req->netreqs
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; !r && (netreq = *netreq_p)
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; netreq_p++)
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r = submit_network_request(netreq);
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netreq = netreq->next;
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}
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break;
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} else
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r = GETDNS_RETURN_BAD_CONTEXT;
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@ -38,31 +38,24 @@
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#include "util-internal.h"
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#include "gldns/rrdef.h"
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void
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network_req_free(getdns_network_req * net_req)
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static void
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network_req_cleanup(getdns_network_req *net_req)
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{
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if (!net_req) {
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return;
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}
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if (net_req->result) {
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assert(net_req);
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if (net_req->result)
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ldns_pkt_free(net_req->result);
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}
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GETDNS_FREE(net_req->owner->my_mf, net_req);
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if (net_req->response && net_req->response != net_req->wire_data)
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GETDNS_FREE(net_req->owner->my_mf, net_req->response);
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}
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getdns_network_req *
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network_req_new(getdns_dns_req * owner,
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uint16_t request_type,
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uint16_t request_class, struct getdns_dict *extensions)
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static void
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network_req_init(getdns_network_req *net_req,
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getdns_dns_req *owner, uint16_t request_type,
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uint16_t request_class, size_t wire_data_sz)
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{
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getdns_network_req *net_req = GETDNS_MALLOC( owner->my_mf
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, getdns_network_req);
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if (!net_req) {
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return NULL;
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}
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net_req->result = NULL;
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net_req->next = NULL;
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net_req->request_type = request_type;
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net_req->request_class = request_class;
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@ -70,8 +63,6 @@ network_req_new(getdns_dns_req * owner,
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net_req->state = NET_REQ_NOT_SENT;
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net_req->owner = owner;
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/* TODO: records and other extensions */
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net_req->upstream = NULL;
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net_req->fd = -1;
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memset(&net_req->event, 0, sizeof(net_req->event));
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@ -79,16 +70,18 @@ network_req_new(getdns_dns_req * owner,
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net_req->query_id = 0;
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net_req->max_udp_payload_size = 0;
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net_req->write_queue_tail = NULL;
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return net_req;
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net_req->wire_data_sz = wire_data_sz;
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net_req->response = NULL;
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}
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void
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dns_req_free(getdns_dns_req * req)
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{
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getdns_network_req **net_req;
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if (!req) {
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return;
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}
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getdns_network_req *net_req = NULL;
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/* free extensions */
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getdns_dict_destroy(req->extensions);
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@ -96,14 +89,11 @@ dns_req_free(getdns_dns_req * req)
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if (req->upstreams && --req->upstreams->referenced == 0)
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GETDNS_FREE(req->upstreams->mf, req->upstreams);
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/* free network requests */
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net_req = req->first_req;
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while (net_req) {
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getdns_network_req *next = net_req->next;
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network_req_free(net_req);
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net_req = next;
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}
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/* cleanup network requests */
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for (net_req = req->netreqs; *net_req; net_req++)
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network_req_cleanup(*net_req);
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/* clear timeout event */
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if (req->timeout.timeout_cb) {
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req->loop->vmt->clear(req->loop, &req->timeout);
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req->timeout.timeout_cb = NULL;
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@ -116,25 +106,47 @@ dns_req_free(getdns_dns_req * req)
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/* create a new dns req to be submitted */
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getdns_dns_req *
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dns_req_new(struct getdns_context *context, getdns_eventloop *loop,
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const char *name, uint16_t request_type, struct getdns_dict *extensions)
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dns_req_new(getdns_context *context, getdns_eventloop *loop,
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const char *name, uint16_t request_type, getdns_dict *extensions)
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{
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getdns_dns_req *result = NULL;
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getdns_network_req *req = NULL;
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uint32_t klass = GLDNS_RR_CLASS_IN;
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result = GETDNS_MALLOC(context->mf, getdns_dns_req);
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if (result == NULL) {
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size_t edns_maximum_udp_payload_size =
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getdns_get_maximum_udp_payload_size(context, extensions, NULL);
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int a_aaaa_query =
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is_extension_set(extensions, "return_both_v4_and_v6") &&
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( request_type == GETDNS_RRTYPE_A ||
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request_type == GETDNS_RRTYPE_AAAA );
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/* Reserve for the buffer at least one more byte
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* (to test for udp overflow) (hence the + 1),
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* And align on the 8 byte boundry (hence the (x + 7) / 8 * 8)
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*/
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size_t netreq_sz = ( sizeof(getdns_network_req)
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+ edns_maximum_udp_payload_size + 1 + 7) / 8 * 8;
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size_t dnsreq_base_sz = ( sizeof(getdns_dns_req)
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+ (a_aaaa_query ? 3 : 2)
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* sizeof(getdns_network_req *));
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uint8_t *region;
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if (! (region = GETDNS_XMALLOC(context->mf, uint8_t,
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dnsreq_base_sz + (a_aaaa_query ? 2 : 1) * netreq_sz)))
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return NULL;
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}
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result = (getdns_dns_req *)region;
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result->netreqs[0] = (getdns_network_req *)(region + dnsreq_base_sz);
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if (a_aaaa_query) {
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result->netreqs[1] = (getdns_network_req *)
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(region + dnsreq_base_sz + netreq_sz);
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result->netreqs[2] = NULL;
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} else
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result->netreqs[1] = NULL;
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result->my_mf = context->mf;
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result->name = getdns_strdup(&(result->my_mf), name);
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result->context = context;
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result->loop = loop;
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result->canceled = 0;
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result->current_req = NULL;
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result->first_req = NULL;
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result->trans_id = (uint64_t)(((intptr_t) result) ^ ldns_get_random());
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getdns_dict_copy(extensions, &result->extensions);
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@ -152,32 +164,14 @@ dns_req_new(struct getdns_context *context, getdns_eventloop *loop,
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if (result->upstreams)
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result->upstreams->referenced++;
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/* create the requests */
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req = network_req_new(result, request_type, klass, extensions);
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if (!req) {
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dns_req_free(result);
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return NULL;
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}
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network_req_init(result->netreqs[0], result, request_type,
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klass, netreq_sz - sizeof(getdns_network_req));
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result->current_req = req;
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result->first_req = req;
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/* tack on A or AAAA if needed */
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if (is_extension_set(extensions, "return_both_v4_and_v6") &&
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(request_type == GETDNS_RRTYPE_A ||
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request_type == GETDNS_RRTYPE_AAAA)) {
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uint16_t next_req_type = (request_type == GETDNS_RRTYPE_A) ?
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GETDNS_RRTYPE_AAAA : GETDNS_RRTYPE_A;
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getdns_network_req *next_req = network_req_new(result,
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next_req_type, LDNS_RR_CLASS_IN, extensions);
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if (!next_req) {
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dns_req_free(result);
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return NULL;
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}
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req->next = next_req;
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}
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if (a_aaaa_query)
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network_req_init(result->netreqs[1], result,
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( request_type == GETDNS_RRTYPE_A
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? GETDNS_RRTYPE_AAAA : GETDNS_RRTYPE_A ),
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klass, netreq_sz - sizeof(getdns_network_req));
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return result;
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}
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@ -170,7 +170,6 @@ getdns_make_query_pkt_buf(const getdns_network_req *netreq, uint8_t *buf,
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if (len < 11)
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return GLDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
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*omax_udp_payload_size = edns_maximum_udp_payload_size;
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buf[0] = 0; /* dname for . */
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gldns_write_uint16(buf + 1, GLDNS_RR_TYPE_OPT);
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gldns_write_uint16(buf + 3,
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@ -191,9 +191,6 @@ typedef struct getdns_network_req
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int secure;
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int bogus;
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/* next request to issue after this one */
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struct getdns_network_req *next;
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/* For stub resolving */
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struct getdns_upstream *upstream;
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int fd;
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@ -206,6 +203,14 @@ typedef struct getdns_network_req
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/* Network requests scheduled to write after me */
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struct getdns_network_req *write_queue_tail;
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/* When more space is needed for the wire_data response than is
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* available in wire_data[], it will be allocated seperately.
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* response will then not point to wire_data anymore.
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*/
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uint8_t *response;
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size_t wire_data_sz;
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uint8_t wire_data[];
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} getdns_network_req;
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/**
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@ -222,12 +227,6 @@ typedef struct getdns_dns_req {
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/* canceled flag */
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int canceled;
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/* current network request */
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struct getdns_network_req *current_req;
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/* first request in list */
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struct getdns_network_req *first_req;
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/* context that owns the request */
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struct getdns_context *context;
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@ -256,6 +255,16 @@ typedef struct getdns_dns_req {
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/* Stuff for stub resolving */
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struct getdns_upstreams *upstreams;
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/* network requests for this dns request.
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* The array is terminated with NULL.
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*
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* Memory for these netreqs has been allocated by the same malloc
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* operation that reserved space for this getdns_dns_req.
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* They will thus be freed as part of the desctruction of this struct,
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* and do not need to be freed seperately.
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*/
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getdns_network_req *netreqs[];
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} getdns_dns_req;
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#define GETDNS_XMALLOC(obj, type, count) \
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@ -294,13 +303,6 @@ typedef struct getdns_dns_req {
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/* utility methods */
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/* network request utilities */
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void network_req_free(getdns_network_req * net_req);
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getdns_network_req *network_req_new(getdns_dns_req * owner,
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uint16_t request_type,
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uint16_t request_class, struct getdns_dict *extensions);
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/* dns request utils */
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getdns_dns_req *dns_req_new(getdns_context *context, getdns_eventloop *loop,
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const char *name, uint16_t request_type, getdns_dict *extensions);
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@ -544,7 +544,7 @@ create_getdns_response(struct getdns_dns_req * completed_request)
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struct getdns_list *just_addrs = NULL;
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struct getdns_list *replies_tree = getdns_list_create_with_context(
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completed_request->context);
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getdns_network_req *netreq;
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getdns_network_req *netreq, **netreq_p;
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char *canonical_name = NULL;
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getdns_return_t r = 0;
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int nreplies = 0, nanswers = 0, nsecure = 0, ninsecure = 0, nbogus = 0;
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@ -562,13 +562,11 @@ create_getdns_response(struct getdns_dns_req * completed_request)
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completed_request->extensions, "dnssec_return_status") ||
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completed_request->return_dnssec_status == GETDNS_EXTENSION_TRUE;
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if (completed_request->first_req &&
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(completed_request->first_req->request_class == GETDNS_RRTYPE_A ||
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completed_request->first_req->request_class ==
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GETDNS_RRTYPE_AAAA)) {
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if (completed_request->netreqs[0]->request_type == GETDNS_RRTYPE_A ||
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completed_request->netreqs[0]->request_type == GETDNS_RRTYPE_AAAA)
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just_addrs = getdns_list_create_with_context(
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completed_request->context);
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}
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do {
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canonical_name = get_canonical_name(completed_request->name);
|
||||
r = getdns_dict_util_set_string(result, GETDNS_STR_KEY_CANONICAL_NM,
|
||||
|
@ -584,9 +582,9 @@ create_getdns_response(struct getdns_dns_req * completed_request)
|
|||
break;
|
||||
}
|
||||
|
||||
for ( netreq = completed_request->first_req
|
||||
; netreq && r == GETDNS_RETURN_GOOD
|
||||
; netreq = netreq->next ) {
|
||||
for ( netreq_p = completed_request->netreqs
|
||||
; ! r && (netreq = *netreq_p)
|
||||
; netreq_p++) {
|
||||
|
||||
if (! netreq->result)
|
||||
continue;
|
||||
|
@ -959,7 +957,7 @@ validate_dname(const char* dname) {
|
|||
} /* validate_dname */
|
||||
|
||||
int
|
||||
is_extension_set(struct getdns_dict *extensions, const char *extension)
|
||||
is_extension_set(getdns_dict *extensions, const char *extension)
|
||||
{
|
||||
getdns_return_t r;
|
||||
uint32_t value;
|
||||
|
@ -971,4 +969,76 @@ is_extension_set(struct getdns_dict *extensions, const char *extension)
|
|||
return r == GETDNS_RETURN_GOOD && value == GETDNS_EXTENSION_TRUE;
|
||||
}
|
||||
|
||||
size_t
|
||||
getdns_get_maximum_udp_payload_size(getdns_context *context,
|
||||
getdns_dict *extensions, getdns_upstream *upstream)
|
||||
{
|
||||
int dnssec_return_status
|
||||
= is_extension_set(extensions, "dnssec_return_status");
|
||||
int dnssec_return_only_secure
|
||||
= is_extension_set(extensions, "dnssec_return_only_secure");
|
||||
int dnssec_return_validation_chain
|
||||
= is_extension_set(extensions, "dnssec_return_validation_chain");
|
||||
int dnssec_extension_set = dnssec_return_status
|
||||
|| dnssec_return_only_secure || dnssec_return_validation_chain;
|
||||
|
||||
uint32_t edns_do_bit;
|
||||
int edns_maximum_udp_payload_size;
|
||||
uint32_t get_edns_maximum_udp_payload_size;
|
||||
uint32_t edns_extended_rcode;
|
||||
uint32_t edns_version;
|
||||
|
||||
getdns_dict *add_opt_parameters;
|
||||
int have_add_opt_parameters;
|
||||
|
||||
getdns_list *options;
|
||||
size_t noptions = 0;
|
||||
|
||||
int with_opt;
|
||||
|
||||
have_add_opt_parameters = getdns_dict_get_dict(extensions,
|
||||
"add_opt_parameters", &add_opt_parameters) == GETDNS_RETURN_GOOD;
|
||||
|
||||
if (dnssec_extension_set) {
|
||||
edns_maximum_udp_payload_size =
|
||||
( upstream && upstream->addr.ss_family == AF_INET6 )
|
||||
? 1232 : 1432;
|
||||
edns_extended_rcode = 0;
|
||||
edns_version = 0;
|
||||
edns_do_bit = 1;
|
||||
} else {
|
||||
edns_maximum_udp_payload_size =
|
||||
context->edns_maximum_udp_payload_size;
|
||||
edns_extended_rcode = context->edns_extended_rcode;
|
||||
edns_version = context->edns_version;
|
||||
edns_do_bit = context->edns_do_bit;
|
||||
|
||||
if (have_add_opt_parameters) {
|
||||
if (!getdns_dict_get_int(add_opt_parameters,
|
||||
"maximum_udp_payload_size",
|
||||
&get_edns_maximum_udp_payload_size))
|
||||
edns_maximum_udp_payload_size =
|
||||
get_edns_maximum_udp_payload_size;
|
||||
(void) getdns_dict_get_int(add_opt_parameters,
|
||||
"extended_rcode", &edns_extended_rcode);
|
||||
(void) getdns_dict_get_int(add_opt_parameters,
|
||||
"version", &edns_version);
|
||||
(void) getdns_dict_get_int(add_opt_parameters,
|
||||
"do_bit", &edns_do_bit);
|
||||
}
|
||||
}
|
||||
if (have_add_opt_parameters && getdns_dict_get_list(
|
||||
add_opt_parameters, "options", &options) == GETDNS_RETURN_GOOD)
|
||||
(void) getdns_list_get_length(options, &noptions);
|
||||
|
||||
with_opt = edns_do_bit != 0 || edns_maximum_udp_payload_size != -1 ||
|
||||
edns_extended_rcode != 0 || edns_version != 0 || noptions;
|
||||
|
||||
return ! with_opt ? 512
|
||||
: edns_maximum_udp_payload_size == -1 ?
|
||||
(upstream && upstream->addr.ss_family==AF_INET6 ) ? 1232 : 1432
|
||||
: edns_maximum_udp_payload_size > 512 ?
|
||||
edns_maximum_udp_payload_size : 512;
|
||||
}
|
||||
|
||||
/* util-internal.c */
|
||||
|
|
|
@ -147,7 +147,10 @@ create_list_from_rr_list(struct getdns_context *context, ldns_rr_list * rr_list)
|
|||
* @param extension name of extension to check
|
||||
* @return int with value 1 if set to GETDNS_EXTENSION_TRUE and 0 otherwise
|
||||
*/
|
||||
int is_extension_set(struct getdns_dict *extensions, const char *extension);
|
||||
int is_extension_set(getdns_dict *extensions, const char *extension);
|
||||
|
||||
size_t getdns_get_maximum_udp_payload_size(getdns_context *context,
|
||||
getdns_dict *extensions, getdns_upstream *upstream);
|
||||
|
||||
#define DEBUG_ON(...) do { \
|
||||
struct timeval tv; \
|
||||
|
|
Loading…
Reference in New Issue