mirror of https://code.videolan.org/videolan/vlc
132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/*****************************************************************************
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* getaddrinfo.c: getaddrinfo/getnameinfo replacement functions
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*****************************************************************************
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* Copyright (C) 2005 VLC authors and VideoLAN
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* Copyright (C) 2002-2007 Rémi Denis-Courmont
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*
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* Author: Rémi Denis-Courmont
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <stddef.h> /* size_t */
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#include <string.h> /* strlen(), memcpy(), memset(), strchr() */
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#include <stdlib.h> /* malloc(), free(), strtoul() */
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#include <errno.h>
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#include <assert.h>
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#include <sys/types.h>
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#include <vlc_network.h>
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int vlc_getnameinfo( const struct sockaddr *sa, int salen,
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char *host, int hostlen, int *portnum, int flags )
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{
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char psz_servbuf[6], *psz_serv;
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int i_servlen, i_val;
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flags |= NI_NUMERICSERV;
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if( portnum != NULL )
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{
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psz_serv = psz_servbuf;
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i_servlen = sizeof( psz_servbuf );
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}
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else
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{
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psz_serv = NULL;
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i_servlen = 0;
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}
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i_val = getnameinfo(sa, salen, host, hostlen, psz_serv, i_servlen, flags);
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if( portnum != NULL )
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*portnum = atoi( psz_serv );
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return i_val;
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}
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/**
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* Resolves a host name to a list of socket addresses (like getaddrinfo()).
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*
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* @param node host name to resolve (encoded as UTF-8), or NULL
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* @param i_port port number for the socket addresses
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* @param p_hints parameters (see getaddrinfo() manual page)
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* @param res pointer set to the resulting chained list.
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* @return 0 on success, a getaddrinfo() error otherwise.
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* On failure, *res is undefined. On success, it must be freed with
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* freeaddrinfo().
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*/
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int vlc_getaddrinfo (const char *node, unsigned port,
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const struct addrinfo *hints, struct addrinfo **res)
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{
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char hostbuf[NI_MAXHOST], portbuf[6], *servname;
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/*
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* In VLC, we always use port number as integer rather than strings
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* for historical reasons (and portability).
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*/
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if (port != 0)
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{
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if (port > 65535)
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return EAI_SERVICE;
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/* cannot overflow */
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snprintf (portbuf, sizeof (portbuf), "%u", port);
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servname = portbuf;
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}
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else
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servname = NULL;
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/*
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* VLC extensions :
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* - accept the empty string as unspecified host (i.e. NULL)
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* - ignore square brackets (for IPv6 numerals)
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*/
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if (node != NULL)
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{
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if (node[0] == '[')
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{
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size_t len = strlen (node + 1);
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if ((len <= sizeof (hostbuf)) && (node[len] == ']'))
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{
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assert (len > 0);
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memcpy (hostbuf, node + 1, len - 1);
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hostbuf[len - 1] = '\0';
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node = hostbuf;
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}
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}
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if (node[0] == '\0')
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node = NULL;
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}
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return getaddrinfo (node, servname, hints, res);
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}
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#if defined (_WIN32) || defined (__OS2__) \
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|| defined (__ANDROID__) || defined (__APPLE__) \
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|| defined (__native_client__)
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#warning vlc_getaddr_info_i11e() not implemented!
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int vlc_getaddrinfo_i11e(const char *node, unsigned port,
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const struct addrinfo *hints, struct addrinfo **res)
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{
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return vlc_getaddrinfo(node, port, hints, res);
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}
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#endif
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