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r7009@Kushana: nickm | 2006-08-03 10:44:58 -0700
Add functions to eventdns to allow detecting whether we have any nameservers configured, and to change the list of nameservers after initial configuration. svn:r6976
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parent
87939813c3
commit
3fa1cdafce
@ -563,7 +563,7 @@ connection_dns_remove(edge_connection_t *conn)
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* <b>address</b> from the cache.
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*/
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void
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dns_cancel_pending_resolve(char *address) //XXXX NM CHECKME.
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dns_cancel_pending_resolve(char *address)
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{
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pending_connection_t *pend;
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cached_resolve_t search;
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@ -393,9 +393,11 @@ error_is_eagain(int err)
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{
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return err == EAGAIN || err == WSAEWOULDBLOCK;
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}
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#define CLOSE_SOCKET(x) closesocket(x)
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#else
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#define last_error(sock) (errno)
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#define error_is_eagain(err) ((err) == EAGAIN)
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#define CLOSE_SOCKET(x) close(x)
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#endif
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#define ISSPACE(c) isspace((int)(unsigned char)(c))
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@ -1165,6 +1167,72 @@ eventdns_transmit(void) {
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return did_try_to_transmit;
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}
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// exported function
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int
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eventdns_count_nameservers(void)
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{
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const struct nameserver *server = server_head;
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int n = 0;
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if (!server)
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return 0;
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do {
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++n;
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server = server->next;
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} while (server != server_head);
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return n;
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}
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// exported function
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int
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eventdns_clear_nameservers_and_suspend(void)
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{
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struct nameserver *server = server_head, *started_at = server_head;
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struct request *req = req_head, *req_started_at = req_head;
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if (!server)
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return 0;
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while (1) {
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struct nameserver *next = server->next;
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event_del(&server->event);
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evtimer_del(&server->timeout_event);
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if (server->socket >= 0)
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CLOSE_SOCKET(server->socket);
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free(server);
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if (next == started_at)
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break;
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server = next;
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}
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server_head = NULL;
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while (req) {
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struct request *next = req->next;
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req->next = req->prev = NULL;
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req->tx_count = req->reissue_count = 0;
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req->ns = NULL;
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// ???? What to do about searches?
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evtimer_del(&req->timeout_event);
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req->trans_id = 0;
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req->transmit_me = 0;
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eventdns_request_insert(req, &req_waiting_head);
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if (next == req_started_at)
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break;
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req = next;
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}
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req_head = NULL;
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return 0;
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}
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// exported function
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int
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eventdns_resume(void)
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{
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eventdns_requests_pump_waiting_queue();
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return 0;
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}
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// exported function
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int
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eventdns_nameserver_add(unsigned long int address) {
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@ -1209,6 +1277,8 @@ eventdns_nameserver_add(unsigned long int address) {
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event_set(&ns->event, ns->socket, EV_READ | EV_PERSIST, nameserver_ready_callback, ns);
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event_add(&ns->event, NULL);
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log("Added nameserver %s", debug_ntoa(address));
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// insert this nameserver into the list of them
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if (!server_head) {
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ns->next = ns->prev = ns;
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@ -1227,13 +1297,11 @@ eventdns_nameserver_add(unsigned long int address) {
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return 0;
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out2:
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#ifdef MS_WINDOWS
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closesocket(ns->socket);
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#else
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close(ns->socket);
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CLOSE_SOCKET(ns->socket);
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#endif
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out1:
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free(ns);
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log("Unable to add nameserver %s: error %d", debug_ntoa(address), err);
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return err;
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}
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@ -49,6 +49,9 @@
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typedef void (*eventdns_callback_type) (int result, char type, int count, int ttl, void *addresses, void *arg);
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int eventdns_nameserver_add(unsigned long int address);
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int eventdns_count_nameservers(void);
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int eventdns_clear_nameservers_and_suspend(void);
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int eventdns_resume(void);
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int eventdns_nameserver_ip_add(const char *ip_as_string);
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int eventdns_resolve(const char *name, int flags, eventdns_callback_type callback, void *ptr);
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int eventdns_resolv_conf_parse(int flags, const char *);
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