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78c3172921
The gethostbyname(3) family was removed in POSIX-1.2008 in favor of getaddrinfo(3) introduced in POSIX-1.2001. Modern POSIX systems such as Sortix does not have gethostbyname nor the related definitions and structures. curl already only uses getaddrinfo(3) if available and thread safe, although there is mild breakage if the related gethostbyname definitions are missing. This change attempts to fix that breakage: Remove an unnecessary configure error if gethostbyname is missing since getaddrinfo is enough as a fallback. Rewrite Curl_ip2addr to not use struct hostent as it no longer is standardized and create the struct Curl_addrinfo directly. Only define the Curl_he2ai function on non-getaddrinfo systems where it is going to be used with struct hoestent. Revoke the fallback logic for when it's unknown whether getaddrinfo is thread safe. It doesn't appear to make any sense since h_errno is unrelated to getaddrinfo. The logic prevents new POSIX.1-2024 systems from passing the thread safety test since h_errno does not exist anymore and POSIX already requires getaddrinfo to be thread safe. There's already a denylist in place for operating systems with known buggy implementations. Closes #15475
111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
#ifndef HEADER_CURL_ADDRINFO_H
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#define HEADER_CURL_ADDRINFO_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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# include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#ifdef __VMS
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# include <in.h>
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# include <inet.h>
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# include <stdlib.h>
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#endif
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/*
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* Curl_addrinfo is our internal struct definition that we use to allow
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* consistent internal handling of this data. We use this even when the system
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* provides an addrinfo structure definition. We use this for all sorts of
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* IPv4 and IPV6 builds.
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*/
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struct Curl_addrinfo {
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int ai_flags;
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int ai_family;
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int ai_socktype;
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int ai_protocol;
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curl_socklen_t ai_addrlen; /* Follow rfc3493 struct addrinfo */
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char *ai_canonname;
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struct sockaddr *ai_addr;
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struct Curl_addrinfo *ai_next;
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};
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void
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Curl_freeaddrinfo(struct Curl_addrinfo *cahead);
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#ifdef HAVE_GETADDRINFO
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int
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Curl_getaddrinfo_ex(const char *nodename,
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const char *servname,
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const struct addrinfo *hints,
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struct Curl_addrinfo **result);
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#endif
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#if !(defined(HAVE_GETADDRINFO) && defined(HAVE_GETADDRINFO_THREADSAFE))
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struct Curl_addrinfo *
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Curl_he2ai(const struct hostent *he, int port);
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#endif
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struct Curl_addrinfo *
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Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port);
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struct Curl_addrinfo *Curl_str2addr(char *dotted, int port);
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#ifdef USE_UNIX_SOCKETS
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struct Curl_addrinfo *Curl_unix2addr(const char *path, bool *longpath,
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bool abstract);
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#endif
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#if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) && \
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defined(HAVE_FREEADDRINFO)
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void
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curl_dbg_freeaddrinfo(struct addrinfo *freethis, int line, const char *source);
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#endif
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#if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
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int
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curl_dbg_getaddrinfo(const char *hostname, const char *service,
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const struct addrinfo *hints, struct addrinfo **result,
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int line, const char *source);
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#endif
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#ifdef HAVE_GETADDRINFO
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#ifdef USE_RESOLVE_ON_IPS
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void Curl_addrinfo_set_port(struct Curl_addrinfo *addrinfo, int port);
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#else
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#define Curl_addrinfo_set_port(x,y)
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#endif
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#endif
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#endif /* HEADER_CURL_ADDRINFO_H */
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