1
2 /* Copyright 1998 by the Massachusetts Institute of Technology.
3 *
4 * Permission to use, copy, modify, and distribute this
5 * software and its documentation for any purpose and without
6 * fee is hereby granted, provided that the above copyright
7 * notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting
9 * documentation, and that the name of M.I.T. not be used in
10 * advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission.
12 * M.I.T. makes no representations about the suitability of
13 * this software for any purpose. It is provided "as is"
14 * without express or implied warranty.
15 */
16
17 #include "ares_setup.h"
18
19 #include "ares.h"
20 #include "ares_private.h"
21
ares__close_sockets(ares_channel channel,struct server_state * server)22 void ares__close_sockets(ares_channel channel, struct server_state *server)
23 {
24 struct send_request *sendreq;
25
26 /* Free all pending output buffers. */
27 while (server->qhead)
28 {
29 /* Advance server->qhead; pull out query as we go. */
30 sendreq = server->qhead;
31 server->qhead = sendreq->next;
32 if (sendreq->data_storage != NULL)
33 ares_free(sendreq->data_storage);
34 ares_free(sendreq);
35 }
36 server->qtail = NULL;
37
38 /* Reset any existing input buffer. */
39 if (server->tcp_buffer)
40 ares_free(server->tcp_buffer);
41 server->tcp_buffer = NULL;
42 server->tcp_lenbuf_pos = 0;
43
44 /* Reset brokenness */
45 server->is_broken = 0;
46
47 /* Close the TCP and UDP sockets. */
48 if (server->tcp_socket != ARES_SOCKET_BAD)
49 {
50 SOCK_STATE_CALLBACK(channel, server->tcp_socket, 0, 0);
51 ares__socket_close(channel, server->tcp_socket);
52 server->tcp_socket = ARES_SOCKET_BAD;
53 server->tcp_connection_generation = ++channel->tcp_connection_generation;
54 }
55 if (server->udp_socket != ARES_SOCKET_BAD)
56 {
57 SOCK_STATE_CALLBACK(channel, server->udp_socket, 0, 0);
58 ares__socket_close(channel, server->udp_socket);
59 server->udp_socket = ARES_SOCKET_BAD;
60 }
61 }
62