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/* $Id$ */
/*
* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <pj/addr_resolv.h>
#include <pj/assert.h>
#include <pj/string.h>
#include <pj/errno.h>
#include <pj/ip_helper.h>
#include <pj/compat/socket.h>
#if defined(PJ_GETADDRINFO_USE_CFHOST) && PJ_GETADDRINFO_USE_CFHOST!=0
# include <CoreFoundation/CFString.h>
# include <CFNetwork/CFHost.h>
#endif
PJ_DEF(pj_status_t) pj_gethostbyname(const pj_str_t *hostname, pj_hostent *phe)
{
struct hostent *he;
char copy[PJ_MAX_HOSTNAME];
pj_assert(hostname && hostname ->slen < PJ_MAX_HOSTNAME);
if (hostname->slen >= PJ_MAX_HOSTNAME)
return PJ_ENAMETOOLONG;
pj_memcpy(copy, hostname->ptr, hostname->slen);
copy[ hostname->slen ] = '\0';
he = gethostbyname(copy);
if (!he) {
return PJ_ERESOLVE;
/* DO NOT use pj_get_netos_error() since host resolution error
* is reported in h_errno instead of errno!
return pj_get_netos_error();
*/
}
phe->h_name = he->h_name;
phe->h_aliases = he->h_aliases;
phe->h_addrtype = he->h_addrtype;
phe->h_length = he->h_length;
phe->h_addr_list = he->h_addr_list;
return PJ_SUCCESS;
}
/* Resolve IPv4/IPv6 address */
PJ_DEF(pj_status_t) pj_getaddrinfo(int af, const pj_str_t *nodename,
unsigned *count, pj_addrinfo ai[])
{
#if defined(PJ_SOCK_HAS_GETADDRINFO) && PJ_SOCK_HAS_GETADDRINFO!=0
char nodecopy[PJ_MAX_HOSTNAME];
pj_bool_t has_addr = PJ_FALSE;
unsigned i;
#if defined(PJ_GETADDRINFO_USE_CFHOST) && PJ_GETADDRINFO_USE_CFHOST!=0
CFStringRef hostname;
CFHostRef hostRef;
pj_status_t status = PJ_SUCCESS;
#else
int rc;
struct addrinfo hint, *res, *orig_res;
#endif
PJ_ASSERT_RETURN(nodename && count && *count && ai, PJ_EINVAL);
PJ_ASSERT_RETURN(nodename->ptr && nodename->slen, PJ_EINVAL);
PJ_ASSERT_RETURN(af==PJ_AF_INET || af==PJ_AF_INET6 ||
af==PJ_AF_UNSPEC, PJ_EINVAL);
/* Check if nodename is IP address */
pj_bzero(&ai[0], sizeof(ai[0]));
if ((af==PJ_AF_INET || af==PJ_AF_UNSPEC) &&
pj_inet_pton(PJ_AF_INET, nodename,
&ai[0].ai_addr.ipv4.sin_addr) == PJ_SUCCESS)
{
af = PJ_AF_INET;
has_addr = PJ_TRUE;
} else if ((af==PJ_AF_INET6 || af==PJ_AF_UNSPEC) &&
pj_inet_pton(PJ_AF_INET6, nodename,
&ai[0].ai_addr.ipv6.sin6_addr) == PJ_SUCCESS)
{
af = PJ_AF_INET6;
has_addr = PJ_TRUE;
}
if (has_addr) {
pj_str_t tmp;
tmp.ptr = ai[0].ai_canonname;
pj_strncpy_with_null(&tmp, nodename, PJ_MAX_HOSTNAME);
ai[0].ai_addr.addr.sa_family = (pj_uint16_t)af;
*count = 1;
return PJ_SUCCESS;
}
/* Copy node name to null terminated string. */
if (nodename->slen >= PJ_MAX_HOSTNAME)
return PJ_ENAMETOOLONG;
pj_memcpy(nodecopy, nodename->ptr, nodename->slen);
nodecopy[nodename->slen] = '\0';
#if defined(PJ_GETADDRINFO_USE_CFHOST) && PJ_GETADDRINFO_USE_CFHOST!=0
hostname = CFStringCreateWithCStringNoCopy(kCFAllocatorDefault, nodecopy,
kCFStringEncodingASCII,
kCFAllocatorNull);
hostRef = CFHostCreateWithName(kCFAllocatorDefault, hostname);
if (CFHostStartInfoResolution(hostRef, kCFHostAddresses, nil)) {
CFArrayRef addrRef = CFHostGetAddressing(hostRef, nil);
i = 0;
if (addrRef != nil) {
CFIndex idx, naddr;
naddr = CFArrayGetCount(addrRef);
for (idx = 0; idx < naddr && i < *count; idx++) {
struct sockaddr *addr;
size_t addr_size;
addr = (struct sockaddr *)
CFDataGetBytePtr(CFArrayGetValueAtIndex(addrRef, idx));
/* This should not happen. */
pj_assert(addr);
/* Ignore unwanted address families */
if (af!=PJ_AF_UNSPEC && addr->sa_family != af)
continue;
/* Store canonical name */
pj_ansi_strcpy(ai[i].ai_canonname, nodecopy);
/* Store address */
addr_size = sizeof(*addr);
if (addr->sa_family == PJ_AF_INET6) {
addr_size = addr->sa_len;
}
PJ_ASSERT_ON_FAIL(addr_size <= sizeof(pj_sockaddr), continue);
pj_memcpy(&ai[i].ai_addr, addr, addr_size);
PJ_SOCKADDR_RESET_LEN(&ai[i].ai_addr);
i++;
}
}
*count = i;
} else {
status = PJ_ERESOLVE;
}
CFRelease(hostRef);
CFRelease(hostname);
return status;
#else
/* Call getaddrinfo() */
pj_bzero(&hint, sizeof(hint));
hint.ai_family = af;
rc = getaddrinfo(nodecopy, NULL, &hint, &res);
if (rc != 0)
return PJ_ERESOLVE;
orig_res = res;
/* Enumerate each item in the result */
for (i=0; i<*count && res; res=res->ai_next) {
/* Ignore unwanted address families */
if (af!=PJ_AF_UNSPEC && res->ai_family != af)
continue;
/* Store canonical name (possibly truncating the name) */
if (res->ai_canonname) {
pj_ansi_strncpy(ai[i].ai_canonname, res->ai_canonname,
sizeof(ai[i].ai_canonname));
ai[i].ai_canonname[sizeof(ai[i].ai_canonname)-1] = '\0';
} else {
pj_ansi_strcpy(ai[i].ai_canonname, nodecopy);
}
/* Store address */
PJ_ASSERT_ON_FAIL(res->ai_addrlen <= sizeof(pj_sockaddr), continue);
pj_memcpy(&ai[i].ai_addr, res->ai_addr, res->ai_addrlen);
PJ_SOCKADDR_RESET_LEN(&ai[i].ai_addr);
/* Next slot */
++i;
}
*count = i;
freeaddrinfo(orig_res);
/* Done */
return PJ_SUCCESS;
#endif
#else /* PJ_SOCK_HAS_GETADDRINFO */
pj_bool_t has_addr = PJ_FALSE;
PJ_ASSERT_RETURN(count && *count, PJ_EINVAL);
/* Check if nodename is IP address */
pj_bzero(&ai[0], sizeof(ai[0]));
if ((af==PJ_AF_INET || af==PJ_AF_UNSPEC) &&
pj_inet_pton(PJ_AF_INET, nodename,
&ai[0].ai_addr.ipv4.sin_addr) == PJ_SUCCESS)
{
af = PJ_AF_INET;
has_addr = PJ_TRUE;
}
else if ((af==PJ_AF_INET6 || af==PJ_AF_UNSPEC) &&
pj_inet_pton(PJ_AF_INET6, nodename,
&ai[0].ai_addr.ipv6.sin6_addr) == PJ_SUCCESS)
{
af = PJ_AF_INET6;
has_addr = PJ_TRUE;
}
if (has_addr) {
pj_str_t tmp;
tmp.ptr = ai[0].ai_canonname;
pj_strncpy_with_null(&tmp, nodename, PJ_MAX_HOSTNAME);
ai[0].ai_addr.addr.sa_family = (pj_uint16_t)af;
*count = 1;
return PJ_SUCCESS;
}
if (af == PJ_AF_INET || af == PJ_AF_UNSPEC) {
pj_hostent he;
unsigned i, max_count;
pj_status_t status;
/* VC6 complains that "he" is uninitialized */
#ifdef _MSC_VER
pj_bzero(&he, sizeof(he));
#endif
status = pj_gethostbyname(nodename, &he);
if (status != PJ_SUCCESS)
return status;
max_count = *count;
*count = 0;
pj_bzero(ai, max_count * sizeof(pj_addrinfo));
for (i=0; he.h_addr_list[i] && *count<max_count; ++i) {
pj_ansi_strncpy(ai[*count].ai_canonname, he.h_name,
sizeof(ai[*count].ai_canonname));
ai[*count].ai_canonname[sizeof(ai[*count].ai_canonname)-1] = '\0';
ai[*count].ai_addr.ipv4.sin_family = PJ_AF_INET;
pj_memcpy(&ai[*count].ai_addr.ipv4.sin_addr,
he.h_addr_list[i], he.h_length);
PJ_SOCKADDR_RESET_LEN(&ai[*count].ai_addr);
(*count)++;
}
return PJ_SUCCESS;
} else {
/* IPv6 is not supported */
*count = 0;
return PJ_EIPV6NOTSUP;
}
#endif /* PJ_SOCK_HAS_GETADDRINFO */
}
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