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3rdparty/c-ares-1.18.1/src/lib/ares_freeaddrinfo.c 1.55 KB
73ef4ff3   Hu Chunming   提交三方库
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  /* Copyright 1998 by the Massachusetts Institute of Technology.
   * Copyright (C) 2019 by Andrew Selivanov
   *
   * Permission to use, copy, modify, and distribute this
   * software and its documentation for any purpose and without
   * fee is hereby granted, provided that the above copyright
   * notice appear in all copies and that both that copyright
   * notice and this permission notice appear in supporting
   * documentation, and that the name of M.I.T. not be used in
   * advertising or publicity pertaining to distribution of the
   * software without specific, written prior permission.
   * M.I.T. makes no representations about the suitability of
   * this software for any purpose.  It is provided "as is"
   * without express or implied warranty.
   */
  
  #include "ares_setup.h"
  
  #ifdef HAVE_NETDB_H
  #  include <netdb.h>
  #endif
  
  #include "ares.h"
  #include "ares_private.h"
  
  void ares__freeaddrinfo_cnames(struct ares_addrinfo_cname *head)
  {
    struct ares_addrinfo_cname *current;
    while (head)
      {
        current = head;
        head = head->next;
        ares_free(current->alias);
        ares_free(current->name);
        ares_free(current);
      }
  }
  
  void ares__freeaddrinfo_nodes(struct ares_addrinfo_node *head)
  {
    struct ares_addrinfo_node *current;
    while (head)
      {
        current = head;
        head = head->ai_next;
        ares_free(current->ai_addr);
        ares_free(current);
      }
  }
  
  void ares_freeaddrinfo(struct ares_addrinfo *ai)
  {
    if (ai == NULL)
      return;
    ares__freeaddrinfo_cnames(ai->cnames);
    ares__freeaddrinfo_nodes(ai->nodes);
    ares_free(ai->name);
    ares_free(ai);
  }