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f1bcfa1122
Add a new ares_library_init_mem() initialization function for the library which allows the library user to specify their own malloc, realloc & free equivalents for use library-wide. Store these function pointers in library-wide global variables, defaulting to libc's malloc(), realloc() and free(). Change all calls to malloc, realloc and free to use the function pointer instead. Also ensure that ares_strdup() is always available (even if the local environment includes strdup(3)), and change the library code to always use it. Convert calls to calloc() to use ares_malloc() + memset
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
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/* Copyright 1998 by the Massachusetts Institute of Technology.
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in
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* advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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* M.I.T. makes no representations about the suitability of
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* this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*/
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#include "ares_setup.h"
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#include "ares.h"
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#include "ares_private.h"
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void ares__close_sockets(ares_channel channel, struct server_state *server)
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{
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struct send_request *sendreq;
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/* Free all pending output buffers. */
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while (server->qhead)
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{
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/* Advance server->qhead; pull out query as we go. */
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sendreq = server->qhead;
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server->qhead = sendreq->next;
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if (sendreq->data_storage != NULL)
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ares_free(sendreq->data_storage);
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ares_free(sendreq);
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}
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server->qtail = NULL;
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/* Reset any existing input buffer. */
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if (server->tcp_buffer)
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ares_free(server->tcp_buffer);
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server->tcp_buffer = NULL;
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server->tcp_lenbuf_pos = 0;
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/* Reset brokenness */
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server->is_broken = 0;
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/* Close the TCP and UDP sockets. */
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if (server->tcp_socket != ARES_SOCKET_BAD)
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{
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SOCK_STATE_CALLBACK(channel, server->tcp_socket, 0, 0);
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sclose(server->tcp_socket);
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server->tcp_socket = ARES_SOCKET_BAD;
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server->tcp_connection_generation = ++channel->tcp_connection_generation;
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}
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if (server->udp_socket != ARES_SOCKET_BAD)
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{
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SOCK_STATE_CALLBACK(channel, server->udp_socket, 0, 0);
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sclose(server->udp_socket);
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server->udp_socket = ARES_SOCKET_BAD;
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}
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}
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