ares_freeaddrinfo.c (2042B)
1 /* MIT License 2 * 3 * Copyright (c) 1998 Massachusetts Institute of Technology 4 * Copyright (c) 2019 Andrew Selivanov 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 * SPDX-License-Identifier: MIT 26 */ 27 28 #include "ares_private.h" 29 30 #ifdef HAVE_NETDB_H 31 # include <netdb.h> 32 #endif 33 34 void ares_freeaddrinfo_cnames(struct ares_addrinfo_cname *head) 35 { 36 struct ares_addrinfo_cname *current; 37 while (head) { 38 current = head; 39 head = head->next; 40 ares_free(current->alias); 41 ares_free(current->name); 42 ares_free(current); 43 } 44 } 45 46 void ares_freeaddrinfo_nodes(struct ares_addrinfo_node *head) 47 { 48 struct ares_addrinfo_node *current; 49 while (head) { 50 current = head; 51 head = head->ai_next; 52 ares_free(current->ai_addr); 53 ares_free(current); 54 } 55 } 56 57 void ares_freeaddrinfo(struct ares_addrinfo *ai) 58 { 59 if (ai == NULL) { 60 return; 61 } 62 ares_freeaddrinfo_cnames(ai->cnames); 63 ares_freeaddrinfo_nodes(ai->nodes); 64 65 ares_free(ai->name); 66 ares_free(ai); 67 }