1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 * SPDX-License-Identifier: curl 22 * 23 ***************************************************************************/ 24 25#include "curl_setup.h" 26 27/*********************************************************************** 28 * Only for IPv6-enabled builds 29 **********************************************************************/ 30#ifdef CURLRES_IPV6 31 32#ifdef HAVE_NETINET_IN_H 33#include <netinet/in.h> 34#endif 35#ifdef HAVE_NETDB_H 36#include <netdb.h> 37#endif 38#ifdef HAVE_ARPA_INET_H 39#include <arpa/inet.h> 40#endif 41#ifdef __VMS 42#include <in.h> 43#include <inet.h> 44#endif 45 46#include "urldata.h" 47#include "sendf.h" 48#include "hostip.h" 49#include "hash.h" 50#include "share.h" 51#include "url.h" 52#include "inet_pton.h" 53#include "connect.h" 54/* The last 3 #include files should be in this order */ 55#include "curl_printf.h" 56#include "curl_memory.h" 57#include "memdebug.h" 58 59/* 60 * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've 61 * been set and returns TRUE if they are OK. 62 */ 63bool Curl_ipvalid(struct Curl_easy *data, struct connectdata *conn) 64{ 65 if(conn->ip_version == CURL_IPRESOLVE_V6) 66 return Curl_ipv6works(data); 67 68 return TRUE; 69} 70 71#if defined(CURLRES_SYNCH) 72 73#ifdef DEBUG_ADDRINFO 74static void dump_addrinfo(const struct Curl_addrinfo *ai) 75{ 76 printf("dump_addrinfo:\n"); 77 for(; ai; ai = ai->ai_next) { 78 char buf[INET6_ADDRSTRLEN]; 79 printf(" fam %2d, CNAME %s, ", 80 ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>"); 81 Curl_printable_address(ai, buf, sizeof(buf)); 82 printf("%s\n", buf); 83 } 84} 85#else 86#define dump_addrinfo(x) Curl_nop_stmt 87#endif 88 89/* 90 * Curl_getaddrinfo() when built IPv6-enabled (non-threading and 91 * non-ares version). 92 * 93 * Returns name information about the given hostname and port number. If 94 * successful, the 'addrinfo' is returned and the fourth argument will point 95 * to memory we need to free after use. That memory *MUST* be freed with 96 * Curl_freeaddrinfo(), nothing else. 97 */ 98struct Curl_addrinfo *Curl_getaddrinfo(struct Curl_easy *data, 99 const char *hostname, 100 int port, 101 int *waitp) 102{ 103 struct addrinfo hints; 104 struct Curl_addrinfo *res; 105 int error; 106 char sbuf[12]; 107 char *sbufptr = NULL; 108#ifndef USE_RESOLVE_ON_IPS 109 char addrbuf[128]; 110#endif 111 int pf = PF_INET; 112 113 *waitp = 0; /* synchronous response only */ 114 115 if((data->conn->ip_version != CURL_IPRESOLVE_V4) && Curl_ipv6works(data)) 116 /* The stack seems to be IPv6-enabled */ 117 pf = PF_UNSPEC; 118 119 memset(&hints, 0, sizeof(hints)); 120 hints.ai_family = pf; 121 hints.ai_socktype = (data->conn->transport == TRNSPRT_TCP) ? 122 SOCK_STREAM : SOCK_DGRAM; 123 124#ifndef USE_RESOLVE_ON_IPS 125 /* 126 * The AI_NUMERICHOST must not be set to get synthesized IPv6 address from 127 * an IPv4 address on iOS and Mac OS X. 128 */ 129 if((1 == Curl_inet_pton(AF_INET, hostname, addrbuf)) || 130 (1 == Curl_inet_pton(AF_INET6, hostname, addrbuf))) { 131 /* the given address is numerical only, prevent a reverse lookup */ 132 hints.ai_flags = AI_NUMERICHOST; 133 } 134#endif 135 136 if(port) { 137 msnprintf(sbuf, sizeof(sbuf), "%d", port); 138 sbufptr = sbuf; 139 } 140 141 error = Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &res); 142 if(error) { 143 infof(data, "getaddrinfo(3) failed for %s:%d", hostname, port); 144 return NULL; 145 } 146 147 if(port) { 148 Curl_addrinfo_set_port(res, port); 149 } 150 151 dump_addrinfo(res); 152 153 return res; 154} 155#endif /* CURLRES_SYNCH */ 156 157#endif /* CURLRES_IPV6 */ 158