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 <stdlib.h> 20 #ifdef HAVE_UNISTD_H 21 #include <unistd.h> 22 #endif 23 24 #include "ares.h" 25 #include "ares_private.h" 26 27 void ares__close_sockets(ares_channel channel, struct server_state *server) 28 { 29 struct send_request *sendreq; 30 31 /* Free all pending output buffers. */ 32 while (server->qhead) 33 { 34 /* Advance server->qhead; pull out query as we go. */ 35 sendreq = server->qhead; 36 server->qhead = sendreq->next; 37 if (sendreq->data_storage != NULL) 38 free(sendreq->data_storage); 39 free(sendreq); 40 } 41 server->qtail = NULL; 42 43 /* Reset any existing input buffer. */ 44 if (server->tcp_buffer) 45 free(server->tcp_buffer); 46 server->tcp_buffer = NULL; 47 server->tcp_lenbuf_pos = 0; 48 49 /* Reset brokenness */ 50 server->is_broken = 0; 51 52 /* Close the TCP and UDP sockets. */ 53 if (server->tcp_socket != ARES_SOCKET_BAD) 54 { 55 SOCK_STATE_CALLBACK(channel, server->tcp_socket, 0, 0); 56 sclose(server->tcp_socket); 57 server->tcp_socket = ARES_SOCKET_BAD; 58 server->tcp_connection_generation = ++channel->tcp_connection_generation; 59 } 60 if (server->udp_socket != ARES_SOCKET_BAD) 61 { 62 SOCK_STATE_CALLBACK(channel, server->udp_socket, 0, 0); 63 sclose(server->udp_socket); 64 server->udp_socket = ARES_SOCKET_BAD; 65 } 66 } 67
