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Mozilla/mozilla/nsprpub/pr/src/misc/prnetdb.c
wtc%netscape.com 7f6484b0b8 We don't assert on invalid arguments now. 
git-svn-id: svn://10.0.0.236/trunk@105558 18797224-902f-48f8-a5cc-f745e15eee43
2001-10-16 23:36:44 +00:00

1557 lines
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Netscape Portable Runtime (NSPR).
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*/
#include "primpl.h"
#include <string.h>
/*
* On Unix, the error code for gethostbyname() and gethostbyaddr()
* is returned in the global variable h_errno, instead of the usual
* errno.
*/
#if defined(XP_UNIX)
#if defined(_PR_NEED_H_ERRNO)
extern int h_errno;
#endif
#define _MD_GETHOST_ERRNO() h_errno
#else
#define _MD_GETHOST_ERRNO() _MD_ERRNO()
#endif
/*
* The meaning of the macros related to gethostbyname, gethostbyaddr,
* and gethostbyname2 is defined below.
* - _PR_HAVE_THREADSAFE_GETHOST: the gethostbyXXX functions return
* the result in thread specific storage. For example, AIX, HP-UX,
* and OSF1.
* - _PR_HAVE_GETHOST_R: have the gethostbyXXX_r functions. See next
* two macros.
* - _PR_HAVE_GETHOST_R_INT: the gethostbyXXX_r functions return an
* int. For example, Linux glibc.
* - _PR_HAVE_GETHOST_R_POINTER: the gethostbyXXX_r functions return
* a struct hostent* pointer. For example, Solaris and IRIX.
*/
#if defined(_PR_NO_PREEMPT) || defined(_PR_HAVE_GETHOST_R) \
|| defined(_PR_HAVE_THREADSAFE_GETHOST)
#define _PR_NO_DNS_LOCK
#endif
#if defined(_PR_NO_DNS_LOCK)
#define LOCK_DNS()
#define UNLOCK_DNS()
#else
PRLock *_pr_dnsLock = NULL;
#define LOCK_DNS() PR_Lock(_pr_dnsLock)
#define UNLOCK_DNS() PR_Unlock(_pr_dnsLock)
#endif /* defined(_PR_NO_DNS_LOCK) */
/*
* Some platforms have the reentrant getprotobyname_r() and
* getprotobynumber_r(). However, they come in two flavors.
* Some return a pointer to struct protoent, others return
* an int.
*/
#if defined(SOLARIS) || (defined(BSDI) && defined(_REENTRANT)) \
|| (defined(LINUX) && defined(_REENTRANT) \
&& !(defined(__GLIBC__) && __GLIBC__ >= 2))
#define _PR_HAVE_GETPROTO_R
#define _PR_HAVE_GETPROTO_R_POINTER
#endif
#if defined(OSF1) \
|| defined(AIX4_3) || (defined(AIX) && defined(_THREAD_SAFE)) \
|| (defined(HPUX10_10) && defined(_REENTRANT)) \
|| (defined(HPUX10_20) && defined(_REENTRANT))
#define _PR_HAVE_GETPROTO_R
#define _PR_HAVE_GETPROTO_R_INT
#endif
#if (defined(LINUX) && defined(__GLIBC__) && __GLIBC__ >= 2)
#define _PR_HAVE_GETPROTO_R
#define _PR_HAVE_5_ARG_GETPROTO_R
#endif
#if !defined(_PR_HAVE_GETPROTO_R)
PRLock* _getproto_lock = NULL;
#endif
#if defined(_PR_INET6_PROBE)
PR_EXTERN(PRBool) _pr_ipv6_is_present;
#endif
#define _PR_IN6_IS_ADDR_UNSPECIFIED(a) \
(((a)->pr_s6_addr32[0] == 0) && \
((a)->pr_s6_addr32[1] == 0) && \
((a)->pr_s6_addr32[2] == 0) && \
((a)->pr_s6_addr32[3] == 0))
#define _PR_IN6_IS_ADDR_LOOPBACK(a) \
(((a)->pr_s6_addr32[0] == 0) && \
((a)->pr_s6_addr32[1] == 0) && \
((a)->pr_s6_addr32[2] == 0) && \
((a)->pr_s6_addr[12] == 0) && \
((a)->pr_s6_addr[13] == 0) && \
((a)->pr_s6_addr[14] == 0) && \
((a)->pr_s6_addr[15] == 0x1U))
const PRIPv6Addr _pr_in6addr_any = {{{ 0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0 }}};
const PRIPv6Addr _pr_in6addr_loopback = {{{ 0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0x1U }}};
/*
* The values at bytes 10 and 11 are compared using pointers to
* 8-bit fields, and not 32-bit fields, to make the comparison work on
* both big-endian and little-endian systems
*/
#define _PR_IN6_IS_ADDR_V4MAPPED(a) \
(((a)->pr_s6_addr32[0] == 0) && \
((a)->pr_s6_addr32[1] == 0) && \
((a)->pr_s6_addr[8] == 0) && \
((a)->pr_s6_addr[9] == 0) && \
((a)->pr_s6_addr[10] == 0xff) && \
((a)->pr_s6_addr[11] == 0xff))
#define _PR_IN6_IS_ADDR_V4COMPAT(a) \
(((a)->pr_s6_addr32[0] == 0) && \
((a)->pr_s6_addr32[1] == 0) && \
((a)->pr_s6_addr32[2] == 0))
#define _PR_IN6_V4MAPPED_TO_IPADDR(a) ((a)->pr_s6_addr32[3])
void _PR_InitNet(void)
{
#if defined(XP_UNIX)
#ifdef HAVE_NETCONFIG
/*
* This one-liner prevents the endless re-open's and re-read's of
* /etc/netconfig on EACH and EVERY call to accept(), connect(), etc.
*/
(void)setnetconfig();
#endif
#endif
#if !defined(_PR_NO_DNS_LOCK)
_pr_dnsLock = PR_NewLock();
#endif
#if !defined(_PR_HAVE_GETPROTO_R)
_getproto_lock = PR_NewLock();
#endif
}
/*
** Allocate space from the buffer, aligning it to "align" before doing
** the allocation. "align" must be a power of 2.
*/
static char *Alloc(PRIntn amount, char **bufp, PRIntn *buflenp, PRIntn align)
{
char *buf = *bufp;
PRIntn buflen = *buflenp;
if (align && ((long)buf & (align - 1))) {
PRIntn skip = align - ((ptrdiff_t)buf & (align - 1));
if (buflen < skip) {
return 0;
}
buf += skip;
buflen -= skip;
}
if (buflen < amount) {
return 0;
}
*bufp = buf + amount;
*buflenp = buflen - amount;
return buf;
}
typedef enum _PRIPAddrConversion {
_PRIPAddrNoConversion,
_PRIPAddrIPv4Mapped,
_PRIPAddrIPv4Compat
} _PRIPAddrConversion;
/*
** Convert an IPv4 address (v4) to an IPv4-mapped IPv6 address (v6).
*/
static void MakeIPv4MappedAddr(const char *v4, char *v6)
{
memset(v6, 0, 10);
memset(v6 + 10, 0xff, 2);
memcpy(v6 + 12, v4, 4);
PR_ASSERT(_PR_IN6_IS_ADDR_V4MAPPED(((PRIPv6Addr *) v6)));
}
/*
** Convert an IPv4 address (v4) to an IPv4-compatible IPv6 address (v6).
*/
static void MakeIPv4CompatAddr(const char *v4, char *v6)
{
memset(v6, 0, 12);
memcpy(v6 + 12, v4, 4);
PR_ASSERT(_PR_IN6_IS_ADDR_V4COMPAT(((PRIPv6Addr *) v6)));
}
/*
** Copy a hostent, and all of the memory that it refers to into
** (hopefully) stacked buffers.
*/
static PRStatus CopyHostent(
struct hostent *from,
char **buf,
PRIntn *bufsize,
_PRIPAddrConversion conversion,
PRHostEnt *to)
{
PRIntn len, na;
char **ap;
if (conversion != _PRIPAddrNoConversion
&& from->h_addrtype == AF_INET) {
PR_ASSERT(from->h_length == 4);
to->h_addrtype = PR_AF_INET6;
to->h_length = 16;
} else {
#if defined(_PR_INET6) || defined(_PR_INET6_PROBE)
if (AF_INET6 == from->h_addrtype)
to->h_addrtype = PR_AF_INET6;
else
#endif
to->h_addrtype = from->h_addrtype;
to->h_length = from->h_length;
}
/* Copy the official name */
if (!from->h_name) return PR_FAILURE;
len = strlen(from->h_name) + 1;
to->h_name = Alloc(len, buf, bufsize, 0);
if (!to->h_name) return PR_FAILURE;
memcpy(to->h_name, from->h_name, len);
/* Count the aliases, then allocate storage for the pointers */
if (!from->h_aliases) {
na = 1;
} else {
for (na = 1, ap = from->h_aliases; *ap != 0; na++, ap++){;} /* nothing to execute */
}
to->h_aliases = (char**)Alloc(
na * sizeof(char*), buf, bufsize, sizeof(char**));
if (!to->h_aliases) return PR_FAILURE;
/* Copy the aliases, one at a time */
if (!from->h_aliases) {
to->h_aliases[0] = 0;
} else {
for (na = 0, ap = from->h_aliases; *ap != 0; na++, ap++) {
len = strlen(*ap) + 1;
to->h_aliases[na] = Alloc(len, buf, bufsize, 0);
if (!to->h_aliases[na]) return PR_FAILURE;
memcpy(to->h_aliases[na], *ap, len);
}
to->h_aliases[na] = 0;
}
/* Count the addresses, then allocate storage for the pointers */
for (na = 1, ap = from->h_addr_list; *ap != 0; na++, ap++){;} /* nothing to execute */
to->h_addr_list = (char**)Alloc(
na * sizeof(char*), buf, bufsize, sizeof(char**));
if (!to->h_addr_list) return PR_FAILURE;
/* Copy the addresses, one at a time */
for (na = 0, ap = from->h_addr_list; *ap != 0; na++, ap++) {
to->h_addr_list[na] = Alloc(to->h_length, buf, bufsize, 0);
if (!to->h_addr_list[na]) return PR_FAILURE;
if (conversion != _PRIPAddrNoConversion
&& from->h_addrtype == AF_INET) {
if (conversion == _PRIPAddrIPv4Mapped) {
MakeIPv4MappedAddr(*ap, to->h_addr_list[na]);
} else {
PR_ASSERT(conversion == _PRIPAddrIPv4Compat);
MakeIPv4CompatAddr(*ap, to->h_addr_list[na]);
}
} else {
memcpy(to->h_addr_list[na], *ap, to->h_length);
}
}
to->h_addr_list[na] = 0;
return PR_SUCCESS;
}
#if !defined(_PR_HAVE_GETPROTO_R)
/*
** Copy a protoent, and all of the memory that it refers to into
** (hopefully) stacked buffers.
*/
static PRStatus CopyProtoent(
struct protoent *from, char *buf, PRIntn bufsize, PRProtoEnt *to)
{
PRIntn len, na;
char **ap;
/* Do the easy stuff */
to->p_num = from->p_proto;
/* Copy the official name */
if (!from->p_name) return PR_FAILURE;
len = strlen(from->p_name) + 1;
to->p_name = Alloc(len, &buf, &bufsize, 0);
if (!to->p_name) return PR_FAILURE;
memcpy(to->p_name, from->p_name, len);
/* Count the aliases, then allocate storage for the pointers */
for (na = 1, ap = from->p_aliases; *ap != 0; na++, ap++){;} /* nothing to execute */
to->p_aliases = (char**)Alloc(
na * sizeof(char*), &buf, &bufsize, sizeof(char**));
if (!to->p_aliases) return PR_FAILURE;
/* Copy the aliases, one at a time */
for (na = 0, ap = from->p_aliases; *ap != 0; na++, ap++) {
len = strlen(*ap) + 1;
to->p_aliases[na] = Alloc(len, &buf, &bufsize, 0);
if (!to->p_aliases[na]) return PR_FAILURE;
memcpy(to->p_aliases[na], *ap, len);
}
to->p_aliases[na] = 0;
return PR_SUCCESS;
}
#endif /* !defined(_PR_HAVE_GETPROTO_R) */
/*
* #################################################################
* NOTE: tmphe, tmpbuf, bufsize, h, and h_err are local variables
* or arguments of PR_GetHostByName, PR_GetIPNodeByName, and
* PR_GetHostByAddr. DO NOT CHANGE THE NAMES OF THESE LOCAL
* VARIABLES OR ARGUMENTS.
* #################################################################
*/
#if defined(_PR_HAVE_GETHOST_R_INT)
#define GETHOSTBYNAME(name) \
(gethostbyname_r(name, &tmphe, tmpbuf, bufsize, &h, &h_err), h)
#define GETHOSTBYNAME2(name, af) \
(gethostbyname2_r(name, af, &tmphe, tmpbuf, bufsize, &h, &h_err), h)
#define GETHOSTBYADDR(addr, addrlen, af) \
(gethostbyaddr_r(addr, addrlen, af, \
&tmphe, tmpbuf, bufsize, &h, &h_err), h)
#elif defined(_PR_HAVE_GETHOST_R_POINTER)
#define GETHOSTBYNAME(name) \
gethostbyname_r(name, &tmphe, tmpbuf, bufsize, &h_err)
#define GETHOSTBYNAME2(name, af) \
gethostbyname2_r(name, af, &tmphe, tmpbuf, bufsize, &h_err)
#define GETHOSTBYADDR(addr, addrlen, af) \
gethostbyaddr_r(addr, addrlen, af, &tmphe, tmpbuf, bufsize, &h_err)
#else
#define GETHOSTBYNAME(name) gethostbyname(name)
#define GETHOSTBYNAME2(name, af) gethostbyname2(name, af)
#define GETHOSTBYADDR(addr, addrlen, af) gethostbyaddr(addr, addrlen, af)
#endif /* definition of GETHOSTBYXXX */
PR_IMPLEMENT(PRStatus) PR_GetHostByName(
const char *name, char *buf, PRIntn bufsize, PRHostEnt *hp)
{
struct hostent *h;
PRStatus rv = PR_FAILURE;
#if defined(_PR_HAVE_GETHOST_R)
char localbuf[PR_NETDB_BUF_SIZE];
char *tmpbuf;
struct hostent tmphe;
int h_err;
#endif
if (!_pr_initialized) _PR_ImplicitInitialization();
#if defined(_PR_HAVE_GETHOST_R)
tmpbuf = localbuf;
if (bufsize > sizeof(localbuf))
{
tmpbuf = PR_Malloc(bufsize);
if (NULL == tmpbuf)
{
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return rv;
}
}
#endif
LOCK_DNS();
#ifdef XP_OS2_VACPP
h = GETHOSTBYNAME((char *)name);
#else
h = GETHOSTBYNAME(name);
#endif
if (NULL == h)
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
}
else
{
_PRIPAddrConversion conversion = _PRIPAddrNoConversion;
rv = CopyHostent(h, &buf, &bufsize, conversion, hp);
if (PR_SUCCESS != rv)
PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
}
UNLOCK_DNS();
#if defined(_PR_HAVE_GETHOST_R)
if (tmpbuf != localbuf)
PR_Free(tmpbuf);
#endif
return rv;
}
#if defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
typedef struct hostent * (*_pr_getipnodebyname_t)(const char *, int,
int, int *);
typedef struct hostent * (*_pr_getipnodebyaddr_t)(const void *, size_t,
int, int *);
typedef void (*_pr_freehostent_t)(struct hostent *);
extern void * _pr_getipnodebyname_fp;
extern void * _pr_getipnodebyaddr_fp;
extern void * _pr_freehostent_fp;
#endif
#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
/*
** Append the V4 addresses to the end of the list
*/
static PRStatus AppendV4AddrsToHostent(
struct hostent *from,
char **buf,
PRIntn *bufsize,
PRHostEnt *to)
{
PRIntn na, na_old;
char **ap;
char **new_addr_list;
/* Count the addresses, then grow storage for the pointers */
for (na_old = 0, ap = to->h_addr_list; *ap != 0; na_old++, ap++)
{;} /* nothing to execute */
for (na = na_old + 1, ap = from->h_addr_list; *ap != 0; na++, ap++)
{;} /* nothing to execute */
new_addr_list = (char**)Alloc(
na * sizeof(char*), buf, bufsize, sizeof(char**));
if (!new_addr_list) return PR_FAILURE;
/* Copy the V6 addresses, one at a time */
for (na = 0, ap = to->h_addr_list; *ap != 0; na++, ap++) {
new_addr_list[na] = to->h_addr_list[na];
}
to->h_addr_list = new_addr_list;
/* Copy the V4 addresses, one at a time */
for (ap = from->h_addr_list; *ap != 0; na++, ap++) {
to->h_addr_list[na] = Alloc(to->h_length, buf, bufsize, 0);
if (!to->h_addr_list[na]) return PR_FAILURE;
MakeIPv4MappedAddr(*ap, to->h_addr_list[na]);
}
to->h_addr_list[na] = 0;
return PR_SUCCESS;
}
#endif
PR_IMPLEMENT(PRStatus) PR_GetIPNodeByName(
const char *name, PRUint16 af, PRIntn flags,
char *buf, PRIntn bufsize, PRHostEnt *hp)
{
struct hostent *h = 0;
PRStatus rv = PR_FAILURE;
#if defined(_PR_HAVE_GETHOST_R)
char localbuf[PR_NETDB_BUF_SIZE];
char *tmpbuf;
struct hostent tmphe;
int h_err;
#endif
#if defined(_PR_HAVE_GETIPNODEBYNAME)
PRUint16 md_af = af;
int error_num;
int tmp_flags = 0;
#endif
#if defined(_PR_HAVE_GETHOSTBYNAME2)
PRBool did_af_inet = PR_FALSE;
#endif
if (!_pr_initialized) _PR_ImplicitInitialization();
if (af != PR_AF_INET && af != PR_AF_INET6) {
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
#if defined(_PR_HAVE_GETIPNODEBYNAME)
if (flags & PR_AI_V4MAPPED)
tmp_flags |= AI_V4MAPPED;
if (flags & PR_AI_ADDRCONFIG)
tmp_flags |= AI_ADDRCONFIG;
if (flags & PR_AI_ALL)
tmp_flags |= AI_ALL;
if (af == PR_AF_INET6)
md_af = AF_INET6;
else
md_af = af;
#endif
#if defined(_PR_HAVE_GETHOST_R)
tmpbuf = localbuf;
if (bufsize > sizeof(localbuf))
{
tmpbuf = PR_Malloc(bufsize);
if (NULL == tmpbuf)
{
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return rv;
}
}
#endif
/* Do not need to lock the DNS lock if getipnodebyname() is called */
#ifdef _PR_INET6
#ifdef _PR_HAVE_GETHOSTBYNAME2
LOCK_DNS();
if (af == PR_AF_INET6)
{
#ifdef _PR_INET6_PROBE
if (_pr_ipv6_is_present == PR_TRUE)
#endif
h = GETHOSTBYNAME2(name, AF_INET6);
if ((NULL == h) && (flags & PR_AI_V4MAPPED))
{
did_af_inet = PR_TRUE;
h = GETHOSTBYNAME2(name, AF_INET);
}
}
else
{
did_af_inet = PR_TRUE;
h = GETHOSTBYNAME2(name, af);
}
#elif defined(_PR_HAVE_GETIPNODEBYNAME)
h = getipnodebyname(name, md_af, tmp_flags, &error_num);
#else
#error "Unknown name-to-address translation function"
#endif /* _PR_HAVE_GETHOSTBYNAME2 */
#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
if (_pr_ipv6_is_present == PR_TRUE)
h = (*((_pr_getipnodebyname_t)_pr_getipnodebyname_fp))(name, md_af, tmp_flags, &error_num);
else
{
LOCK_DNS();
h = GETHOSTBYNAME(name);
}
#else /* _PR_INET6 */
LOCK_DNS();
#ifdef XP_OS2_VACPP
h = GETHOSTBYNAME((char *)name);
#else
h = GETHOSTBYNAME(name);
#endif
#endif /* _PR_INET6 */
if (NULL == h)
{
#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
if (_pr_ipv6_is_present == PR_TRUE)
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
else
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
#else
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
#endif
}
else
{
_PRIPAddrConversion conversion = _PRIPAddrNoConversion;
if (af == PR_AF_INET6) conversion = _PRIPAddrIPv4Mapped;
rv = CopyHostent(h, &buf, &bufsize, conversion, hp);
if (PR_SUCCESS != rv)
PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYNAME)
freehostent(h);
#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
if (_pr_ipv6_is_present == PR_TRUE)
(*((_pr_freehostent_t)_pr_freehostent_fp))(h);
#endif
#if defined(_PR_INET6) && defined(_PR_HAVE_GETHOSTBYNAME2)
if ((PR_SUCCESS == rv) && (flags & PR_AI_V4MAPPED)
&& (flags & (PR_AI_ALL|PR_AI_ADDRCONFIG))
&& !did_af_inet && (h = GETHOSTBYNAME2(name, AF_INET)) != 0) {
rv = AppendV4AddrsToHostent(h, &buf, &bufsize, hp);
if (PR_SUCCESS != rv)
PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
}
#endif
}
/* Must match the convoluted logic above for LOCK_DNS() */
#ifdef _PR_INET6
#ifdef _PR_HAVE_GETHOSTBYNAME2
UNLOCK_DNS();
#endif /* _PR_HAVE_GETHOSTBYNAME2 */
#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYNAME)
if (_pr_ipv6_is_present == PR_FALSE)
UNLOCK_DNS();
#else /* _PR_INET6 */
UNLOCK_DNS();
#endif /* _PR_INET6 */
#if defined(_PR_HAVE_GETHOST_R)
if (tmpbuf != localbuf)
PR_Free(tmpbuf);
#endif
return rv;
}
PR_IMPLEMENT(PRStatus) PR_GetHostByAddr(
const PRNetAddr *hostaddr, char *buf, PRIntn bufsize, PRHostEnt *hostentry)
{
struct hostent *h;
PRStatus rv = PR_FAILURE;
const void *addr;
PRUint32 tmp_ip;
int addrlen;
PRInt32 af;
#if defined(_PR_HAVE_GETHOST_R)
char localbuf[PR_NETDB_BUF_SIZE];
char *tmpbuf;
struct hostent tmphe;
int h_err;
#endif
#if defined(_PR_HAVE_GETIPNODEBYADDR)
int error_num;
#endif
if (!_pr_initialized) _PR_ImplicitInitialization();
if (hostaddr->raw.family == PR_AF_INET6)
{
#if defined(_PR_INET6_PROBE)
if (_pr_ipv6_is_present == PR_TRUE)
af = AF_INET6;
else
af = AF_INET;
#elif defined(_PR_INET6)
af = AF_INET6;
#else
af = AF_INET;
#endif
}
else
{
PR_ASSERT(hostaddr->raw.family == AF_INET);
af = AF_INET;
}
if (hostaddr->raw.family == PR_AF_INET6) {
#if defined(_PR_INET6) || defined(_PR_INET6_PROBE)
if (af == AF_INET6) {
addr = &hostaddr->ipv6.ip;
addrlen = sizeof(hostaddr->ipv6.ip);
}
else
#endif
{
PR_ASSERT(af == AF_INET);
if (!_PR_IN6_IS_ADDR_V4MAPPED(&hostaddr->ipv6.ip)) {
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return rv;
}
tmp_ip = _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)
&hostaddr->ipv6.ip);
addr = &tmp_ip;
addrlen = sizeof(tmp_ip);
}
} else {
PR_ASSERT(hostaddr->raw.family == AF_INET);
PR_ASSERT(af == AF_INET);
addr = &hostaddr->inet.ip;
addrlen = sizeof(hostaddr->inet.ip);
}
#if defined(_PR_HAVE_GETHOST_R)
tmpbuf = localbuf;
if (bufsize > sizeof(localbuf))
{
tmpbuf = PR_Malloc(bufsize);
if (NULL == tmpbuf)
{
PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
return rv;
}
}
#endif
/* Do not need to lock the DNS lock if getipnodebyaddr() is called */
#if defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6)
h = getipnodebyaddr(addr, addrlen, af, &error_num);
#elif defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6_PROBE)
if (_pr_ipv6_is_present == PR_TRUE)
h = (*((_pr_getipnodebyaddr_t)_pr_getipnodebyaddr_fp))(addr, addrlen,
af, &error_num);
else
{
LOCK_DNS();
h = GETHOSTBYADDR(addr, addrlen, af);
}
#else /* _PR_HAVE_GETIPNODEBYADDR */
LOCK_DNS();
#ifdef XP_OS2_VACPP
h = GETHOSTBYADDR((char *)addr, addrlen, af);
#else
h = GETHOSTBYADDR(addr, addrlen, af);
#endif
#endif /* _PR_HAVE_GETIPNODEBYADDR */
if (NULL == h)
{
#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYADDR)
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYADDR)
if (_pr_ipv6_is_present == PR_TRUE)
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, error_num);
else
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
#else
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_GETHOST_ERRNO());
#endif
}
else
{
_PRIPAddrConversion conversion = _PRIPAddrNoConversion;
if (hostaddr->raw.family == PR_AF_INET6) {
if (af == AF_INET) {
if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr*)
&hostaddr->ipv6.ip)) {
conversion = _PRIPAddrIPv4Mapped;
} else if (_PR_IN6_IS_ADDR_V4COMPAT((PRIPv6Addr *)
&hostaddr->ipv6.ip)) {
conversion = _PRIPAddrIPv4Compat;
}
}
}
rv = CopyHostent(h, &buf, &bufsize, conversion, hostentry);
if (PR_SUCCESS != rv) {
PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
}
#if defined(_PR_INET6) && defined(_PR_HAVE_GETIPNODEBYADDR)
freehostent(h);
#elif defined(_PR_INET6_PROBE) && defined(_PR_HAVE_GETIPNODEBYADDR)
if (_pr_ipv6_is_present == PR_TRUE)
(*((_pr_freehostent_t)_pr_freehostent_fp))(h);
#endif
}
/* Must match the convoluted logic above for LOCK_DNS() */
#if defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6)
#elif defined(_PR_HAVE_GETIPNODEBYADDR) && defined(_PR_INET6_PROBE)
if (_pr_ipv6_is_present == PR_FALSE)
UNLOCK_DNS();
#else /* _PR_HAVE_GETIPNODEBYADDR */
UNLOCK_DNS();
#endif /* _PR_HAVE_GETIPNODEBYADDR */
#if defined(_PR_HAVE_GETHOST_R)
if (tmpbuf != localbuf)
PR_Free(tmpbuf);
#endif
return rv;
}
/******************************************************************************/
/*
* Some systems define a reentrant version of getprotobyname(). Too bad
* the signature isn't always the same. But hey, they tried. If there
* is such a definition, use it. Otherwise, grab a lock and do it here.
*/
/******************************************************************************/
#if !defined(_PR_HAVE_GETPROTO_R)
/*
* This may seem like a silly thing to do, but the compiler SHOULD
* complain if getprotobyname_r() is implemented on some system and
* we're not using it. For sure these signatures are different than
* any usable implementation.
*/
static struct protoent *getprotobyname_r(const char* name)
{
#ifdef XP_OS2_VACPP
return getprotobyname((char *)name);
#else
return getprotobyname(name);
#endif
} /* getprotobyname_r */
static struct protoent *getprotobynumber_r(PRInt32 number)
{
return getprotobynumber(number);
} /* getprotobynumber_r */
#endif /* !defined(_PR_HAVE_GETPROTO_R) */
PR_IMPLEMENT(PRStatus) PR_GetProtoByName(
const char* name, char* buffer, PRInt32 buflen, PRProtoEnt* result)
{
PRStatus rv = PR_SUCCESS;
#if defined(_PR_HAVE_GETPROTO_R)
struct protoent* res = (struct protoent*)result;
#endif
if (!_pr_initialized) _PR_ImplicitInitialization();
#if defined(_PR_HAVE_GETPROTO_R_INT)
{
/*
** The protoent_data has a pointer as the first field.
** That implies the buffer better be aligned, and char*
** doesn't promise much.
*/
PRUptrdiff aligned = (PRUptrdiff)buffer;
if (0 != (aligned & (sizeof(struct protoent_data*) - 1)))
{
aligned += sizeof(struct protoent_data*) - 1;
aligned &= ~(sizeof(struct protoent_data*) - 1);
buflen -= (aligned - (PRUptrdiff)buffer);
buffer = (char*)aligned;
}
}
#endif /* defined(_PR_HAVE_GETPROTO_R_INT) */
if (PR_NETDB_BUF_SIZE > buflen)
{
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
#if defined(_PR_HAVE_GETPROTO_R_POINTER)
if (NULL == getprotobyname_r(name, res, buffer, buflen))
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
#elif defined(_PR_HAVE_GETPROTO_R_INT)
/*
** The buffer needs to be zero'd, and it should be
** at least the size of a struct protoent_data.
*/
memset(buffer, 0, buflen);
if (-1 == getprotobyname_r(name, res, (struct protoent_data*)buffer))
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
#elif defined(_PR_HAVE_5_ARG_GETPROTO_R)
/* The 5th argument for getprotobyname_r() cannot be NULL */
if (-1 == getprotobyname_r(name, res, buffer, buflen, &res))
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
#else /* do it the hard way */
{
struct protoent *staticBuf;
PR_Lock(_getproto_lock);
staticBuf = getprotobyname_r(name);
if (NULL == staticBuf)
{
rv = PR_FAILURE;
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
}
else
{
rv = CopyProtoent(staticBuf, buffer, buflen, result);
if (PR_FAILURE == rv)
PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
}
PR_Unlock(_getproto_lock);
}
#endif /* all that */
return rv;
}
PR_IMPLEMENT(PRStatus) PR_GetProtoByNumber(
PRInt32 number, char* buffer, PRInt32 buflen, PRProtoEnt* result)
{
PRStatus rv = PR_SUCCESS;
#if defined(_PR_HAVE_GETPROTO_R)
struct protoent* res = (struct protoent*)result;
#endif
if (!_pr_initialized) _PR_ImplicitInitialization();
#if defined(_PR_HAVE_GETPROTO_R_INT)
{
/*
** The protoent_data has a pointer as the first field.
** That implies the buffer better be aligned, and char*
** doesn't promise much.
*/
PRUptrdiff aligned = (PRUptrdiff)buffer;
if (0 != (aligned & (sizeof(struct protoent_data*) - 1)))
{
aligned += sizeof(struct protoent_data*) - 1;
aligned &= ~(sizeof(struct protoent_data*) - 1);
buflen -= (aligned - (PRUptrdiff)buffer);
buffer = (char*)aligned;
}
}
#endif /* defined(_PR_HAVE_GETPROTO_R_INT) */
if (PR_NETDB_BUF_SIZE > buflen)
{
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
#if defined(_PR_HAVE_GETPROTO_R_POINTER)
if (NULL == getprotobynumber_r(number, res, buffer, buflen))
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
#elif defined(_PR_HAVE_GETPROTO_R_INT)
/*
** The buffer needs to be zero'd for these OS's.
*/
memset(buffer, 0, buflen);
if (-1 == getprotobynumber_r(number, res, (struct protoent_data*)buffer))
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
#elif defined(_PR_HAVE_5_ARG_GETPROTO_R)
/* The 5th argument for getprotobynumber_r() cannot be NULL */
if (-1 == getprotobynumber_r(number, res, buffer, buflen, &res))
{
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
return PR_FAILURE;
}
#else /* do it the hard way */
{
struct protoent *staticBuf;
PR_Lock(_getproto_lock);
staticBuf = getprotobynumber_r(number);
if (NULL == staticBuf)
{
rv = PR_FAILURE;
PR_SetError(PR_DIRECTORY_LOOKUP_ERROR, _MD_ERRNO());
}
else
{
rv = CopyProtoent(staticBuf, buffer, buflen, result);
if (PR_FAILURE == rv)
PR_SetError(PR_INSUFFICIENT_RESOURCES_ERROR, 0);
}
PR_Unlock(_getproto_lock);
}
#endif /* all that crap */
return rv;
}
PRUintn _PR_NetAddrSize(const PRNetAddr* addr)
{
PRUintn addrsize;
/*
* RFC 2553 added a new field (sin6_scope_id) to
* struct sockaddr_in6. PRNetAddr's ipv6 member has a
* scope_id field to match the new field. In order to
* work with older implementations supporting RFC 2133,
* we take the size of struct sockaddr_in6 instead of
* addr->ipv6.
*/
if (AF_INET == addr->raw.family)
addrsize = sizeof(addr->inet);
else if (PR_AF_INET6 == addr->raw.family)
#if defined(_PR_INET6)
addrsize = sizeof(struct sockaddr_in6);
#else
addrsize = sizeof(addr->ipv6);
#endif
#if defined(XP_UNIX)
else if (AF_UNIX == addr->raw.family)
addrsize = sizeof(addr->local);
#endif
else addrsize = 0;
return addrsize;
} /* _PR_NetAddrSize */
PR_IMPLEMENT(PRIntn) PR_EnumerateHostEnt(
PRIntn enumIndex, const PRHostEnt *hostEnt, PRUint16 port, PRNetAddr *address)
{
void *addr = hostEnt->h_addr_list[enumIndex++];
memset(address, 0, sizeof(PRNetAddr));
if (NULL == addr) enumIndex = 0;
else
{
address->raw.family = hostEnt->h_addrtype;
if (PR_AF_INET6 == hostEnt->h_addrtype)
{
address->ipv6.port = htons(port);
address->ipv6.flowinfo = 0;
address->ipv6.scope_id = 0;
memcpy(&address->ipv6.ip, addr, hostEnt->h_length);
}
else
{
PR_ASSERT(AF_INET == hostEnt->h_addrtype);
address->inet.port = htons(port);
memcpy(&address->inet.ip, addr, hostEnt->h_length);
}
}
return enumIndex;
} /* PR_EnumerateHostEnt */
PR_IMPLEMENT(PRStatus) PR_InitializeNetAddr(
PRNetAddrValue val, PRUint16 port, PRNetAddr *addr)
{
PRStatus rv = PR_SUCCESS;
if (!_pr_initialized) _PR_ImplicitInitialization();
if (val != PR_IpAddrNull) memset(addr, 0, sizeof(addr->inet));
addr->inet.family = AF_INET;
addr->inet.port = htons(port);
switch (val)
{
case PR_IpAddrNull:
break; /* don't overwrite the address */
case PR_IpAddrAny:
addr->inet.ip = htonl(INADDR_ANY);
break;
case PR_IpAddrLoopback:
addr->inet.ip = htonl(INADDR_LOOPBACK);
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
rv = PR_FAILURE;
}
return rv;
} /* PR_InitializeNetAddr */
PR_IMPLEMENT(PRStatus) PR_SetNetAddr(
PRNetAddrValue val, PRUint16 af, PRUint16 port, PRNetAddr *addr)
{
PRStatus rv = PR_SUCCESS;
if (!_pr_initialized) _PR_ImplicitInitialization();
if (af == PR_AF_INET6)
{
if (val != PR_IpAddrNull) memset(addr, 0, sizeof(addr->ipv6));
addr->ipv6.family = af;
addr->ipv6.port = htons(port);
addr->ipv6.flowinfo = 0;
addr->ipv6.scope_id = 0;
switch (val)
{
case PR_IpAddrNull:
break; /* don't overwrite the address */
case PR_IpAddrAny:
addr->ipv6.ip = _pr_in6addr_any;
break;
case PR_IpAddrLoopback:
addr->ipv6.ip = _pr_in6addr_loopback;
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
rv = PR_FAILURE;
}
}
else
{
if (val != PR_IpAddrNull) memset(addr, 0, sizeof(addr->inet));
addr->inet.family = af;
addr->inet.port = htons(port);
switch (val)
{
case PR_IpAddrNull:
break; /* don't overwrite the address */
case PR_IpAddrAny:
addr->inet.ip = htonl(INADDR_ANY);
break;
case PR_IpAddrLoopback:
addr->inet.ip = htonl(INADDR_LOOPBACK);
break;
default:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
rv = PR_FAILURE;
}
}
return rv;
} /* PR_SetNetAddr */
PR_IMPLEMENT(PRBool)
PR_IsNetAddrType(const PRNetAddr *addr, PRNetAddrValue val)
{
if (addr->raw.family == PR_AF_INET6) {
if (val == PR_IpAddrAny) {
if (_PR_IN6_IS_ADDR_UNSPECIFIED((PRIPv6Addr *)&addr->ipv6.ip)) {
return PR_TRUE;
} else if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)
&& _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)&addr->ipv6.ip)
== htonl(INADDR_ANY)) {
return PR_TRUE;
}
} else if (val == PR_IpAddrLoopback) {
if (_PR_IN6_IS_ADDR_LOOPBACK((PRIPv6Addr *)&addr->ipv6.ip)) {
return PR_TRUE;
} else if (_PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)
&& _PR_IN6_V4MAPPED_TO_IPADDR((PRIPv6Addr *)&addr->ipv6.ip)
== htonl(INADDR_LOOPBACK)) {
return PR_TRUE;
}
} else if (val == PR_IpAddrV4Mapped
&& _PR_IN6_IS_ADDR_V4MAPPED((PRIPv6Addr *)&addr->ipv6.ip)) {
return PR_TRUE;
}
} else {
if (addr->raw.family == AF_INET) {
if (val == PR_IpAddrAny && addr->inet.ip == htonl(INADDR_ANY)) {
return PR_TRUE;
} else if (val == PR_IpAddrLoopback
&& addr->inet.ip == htonl(INADDR_LOOPBACK)) {
return PR_TRUE;
}
}
}
return PR_FALSE;
}
#ifndef _PR_INET6
#define XX 127
static const unsigned char index_hex[256] = {
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,XX,XX, XX,XX,XX,XX,
XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
};
/*
* StringToV6Addr() returns 1 if the conversion succeeds,
* or 0 if the input is not a valid IPv6 address string.
* (Same as inet_pton(AF_INET6, string, addr).)
*/
static int StringToV6Addr(const char *string, PRIPv6Addr *addr)
{
const unsigned char *s = (const unsigned char *)string;
int section = 0; /* index of the current section (a 16-bit
* piece of the address */
int double_colon = -1; /* index of the section after the first
* 16-bit group of zeros represented by
* the double colon */
unsigned int val;
int len;
/* Handle initial (double) colon */
if (*s == ':') {
if (s[1] != ':') return 0;
s += 2;
addr->pr_s6_addr16[0] = 0;
section = double_colon = 1;
}
while (*s) {
if (section == 8) return 0; /* too long */
if (*s == ':') {
if (double_colon != -1) return 0; /* two double colons */
addr->pr_s6_addr16[section++] = 0;
double_colon = section;
s++;
continue;
}
for (len = val = 0; len < 4 && index_hex[*s] != XX; len++) {
val = (val << 4) + index_hex[*s++];
}
if (*s == '.') {
if (len == 0) return 0; /* nothing between : and . */
break;
}
if (*s == ':') {
s++;
if (!*s) return 0; /* cannot end with single colon */
} else if (*s) {
return 0; /* bad character */
}
addr->pr_s6_addr16[section++] = htons((unsigned short)val);
}
if (*s == '.') {
/* Have a trailing v4 format address */
if (section > 6) return 0; /* not enough room */
/*
* The number before the '.' is decimal, but we parsed it
* as hex. That means it is in BCD. Check it for validity
* and convert it to binary.
*/
if (val > 0x0255 || (val & 0xf0) > 0x90 || (val & 0xf) > 9) return 0;
val = (val >> 8) * 100 + ((val >> 4) & 0xf) * 10 + (val & 0xf);
addr->pr_s6_addr[2 * section] = val;
s++;
val = index_hex[*s++];
if (val > 9) return 0;
while (*s >= '0' && *s <= '9') {
val = val * 10 + *s++ - '0';
if (val > 255) return 0;
}
if (*s != '.') return 0; /* must have exactly 4 decimal numbers */
addr->pr_s6_addr[2 * section + 1] = val;
section++;
s++;
val = index_hex[*s++];
if (val > 9) return 0;
while (*s >= '0' && *s <= '9') {
val = val * 10 + *s++ - '0';
if (val > 255) return 0;
}
if (*s != '.') return 0; /* must have exactly 4 decimal numbers */
addr->pr_s6_addr[2 * section] = val;
s++;
val = index_hex[*s++];
if (val > 9) return 0;
while (*s >= '0' && *s <= '9') {
val = val * 10 + *s++ - '0';
if (val > 255) return 0;
}
if (*s) return 0; /* must have exactly 4 decimal numbers */
addr->pr_s6_addr[2 * section + 1] = val;
section++;
}
if (double_colon != -1) {
/* Stretch the double colon */
int tosection;
int ncopy = section - double_colon;
for (tosection = 7; ncopy--; tosection--) {
addr->pr_s6_addr16[tosection] =
addr->pr_s6_addr16[double_colon + ncopy];
}
while (tosection >= double_colon) {
addr->pr_s6_addr16[tosection--] = 0;
}
} else if (section != 8) {
return 0; /* too short */
}
return 1;
}
#undef XX
static const char *basis_hex = "0123456789abcdef";
/*
* V6AddrToString() returns a pointer to the buffer containing
* the text string if the conversion succeeds, and NULL otherwise.
* (Same as inet_ntop(AF_INET6, addr, buf, size), except that errno
* is not set on failure.)
*/
static const char *V6AddrToString(
const PRIPv6Addr *addr, char *buf, PRUint32 size)
{
#define STUFF(c) do { \
if (!size--) return NULL; \
*buf++ = (c); \
} while (0)
int double_colon = -1; /* index of the first 16-bit
* group of zeros represented
* by the double colon */
int double_colon_length = 1; /* use double colon only if
* there are two or more 16-bit
* groups of zeros */
int zero_length;
int section;
unsigned int val;
const char *bufcopy = buf;
/* Scan to find the placement of the double colon */
for (section = 0; section < 8; section++) {
if (addr->pr_s6_addr16[section] == 0) {
zero_length = 1;
section++;
while (section < 8 && addr->pr_s6_addr16[section] == 0) {
zero_length++;
section++;
}
/* Select the longest sequence of zeros */
if (zero_length > double_colon_length) {
double_colon = section - zero_length;
double_colon_length = zero_length;
}
}
}
/* Now start converting to a string */
section = 0;
if (double_colon == 0) {
if (double_colon_length == 6 ||
(double_colon_length == 5 && addr->pr_s6_addr16[5] == 0xffff)) {
/* ipv4 format address */
STUFF(':');
STUFF(':');
if (double_colon_length == 5) {
STUFF('f');
STUFF('f');
STUFF('f');
STUFF('f');
STUFF(':');
}
if (addr->pr_s6_addr[12] > 99) STUFF(addr->pr_s6_addr[12]/100 + '0');
if (addr->pr_s6_addr[12] > 9) STUFF((addr->pr_s6_addr[12]%100)/10 + '0');
STUFF(addr->pr_s6_addr[12]%10 + '0');
STUFF('.');
if (addr->pr_s6_addr[13] > 99) STUFF(addr->pr_s6_addr[13]/100 + '0');
if (addr->pr_s6_addr[13] > 9) STUFF((addr->pr_s6_addr[13]%100)/10 + '0');
STUFF(addr->pr_s6_addr[13]%10 + '0');
STUFF('.');
if (addr->pr_s6_addr[14] > 99) STUFF(addr->pr_s6_addr[14]/100 + '0');
if (addr->pr_s6_addr[14] > 9) STUFF((addr->pr_s6_addr[14]%100)/10 + '0');
STUFF(addr->pr_s6_addr[14]%10 + '0');
STUFF('.');
if (addr->pr_s6_addr[15] > 99) STUFF(addr->pr_s6_addr[15]/100 + '0');
if (addr->pr_s6_addr[15] > 9) STUFF((addr->pr_s6_addr[15]%100)/10 + '0');
STUFF(addr->pr_s6_addr[15]%10 + '0');
STUFF('\0');
return bufcopy;
}
}
while (section < 8) {
if (section == double_colon) {
STUFF(':');
STUFF(':');
section += double_colon_length;
continue;
}
val = ntohs(addr->pr_s6_addr16[section]);
if (val > 0xfff) {
STUFF(basis_hex[val >> 12]);
}
if (val > 0xff) {
STUFF(basis_hex[(val >> 8) & 0xf]);
}
if (val > 0xf) {
STUFF(basis_hex[(val >> 4) & 0xf]);
}
STUFF(basis_hex[val & 0xf]);
section++;
if (section < 8 && section != double_colon) STUFF(':');
}
STUFF('\0');
return bufcopy;
#undef STUFF
}
#endif /* !_PR_INET6 */
PR_IMPLEMENT(PRStatus) PR_StringToNetAddr(const char *string, PRNetAddr *addr)
{
PRStatus status = PR_SUCCESS;
PRIntn rv;
#if defined(_PR_INET6)
rv = inet_pton(AF_INET6, string, &addr->ipv6.ip);
if (1 == rv)
{
addr->raw.family = PR_AF_INET6;
}
else
{
PR_ASSERT(0 == rv);
/* clean up after the failed inet_pton() call */
memset(&addr->ipv6.ip, 0, sizeof(addr->ipv6.ip));
rv = inet_pton(AF_INET, string, &addr->inet.ip);
if (1 == rv)
{
addr->raw.family = AF_INET;
}
else
{
PR_ASSERT(0 == rv);
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
status = PR_FAILURE;
}
}
#else /* _PR_INET6 */
rv = StringToV6Addr(string, &addr->ipv6.ip);
if (1 == rv) {
addr->raw.family = PR_AF_INET6;
return PR_SUCCESS;
}
PR_ASSERT(0 == rv);
/* clean up after the failed StringToV6Addr() call */
memset(&addr->ipv6.ip, 0, sizeof(addr->ipv6.ip));
addr->inet.family = AF_INET;
#ifdef XP_OS2_VACPP
addr->inet.ip = inet_addr((char *)string);
#else
addr->inet.ip = inet_addr(string);
#endif
if ((PRUint32) -1 == addr->inet.ip)
{
/*
* The string argument is a malformed address string.
*/
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
status = PR_FAILURE;
}
#endif /* _PR_INET6 */
return status;
}
PR_IMPLEMENT(PRStatus) PR_NetAddrToString(
const PRNetAddr *addr, char *string, PRUint32 size)
{
if (PR_AF_INET6 == addr->raw.family)
{
#if defined(_PR_INET6)
if (NULL == inet_ntop(AF_INET6, &addr->ipv6.ip, string, size))
#else
if (NULL == V6AddrToString(&addr->ipv6.ip, string, size))
#endif
{
/* the size of the result buffer is inadequate */
PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
return PR_FAILURE;
}
}
else
{
if (size < 16) goto failed;
if (AF_INET != addr->raw.family) goto failed;
else
{
unsigned char *byte = (unsigned char*)&addr->inet.ip;
PR_snprintf(string, size, "%u.%u.%u.%u",
byte[0], byte[1], byte[2], byte[3]);
}
}
return PR_SUCCESS;
failed:
PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
} /* PR_NetAddrToString */
/*
* Convert an IPv4 addr to an (IPv4-mapped) IPv6 addr
*/
PR_IMPLEMENT(void) PR_ConvertIPv4AddrToIPv6(PRUint32 v4addr, PRIPv6Addr *v6addr)
{
PRUint8 *dstp;
dstp = v6addr->pr_s6_addr;
memset(dstp, 0, 10);
memset(dstp + 10, 0xff, 2);
memcpy(dstp + 12,(char *) &v4addr, 4);
}
PR_IMPLEMENT(PRUint16) PR_ntohs(PRUint16 n) { return ntohs(n); }
PR_IMPLEMENT(PRUint32) PR_ntohl(PRUint32 n) { return ntohl(n); }
PR_IMPLEMENT(PRUint16) PR_htons(PRUint16 n) { return htons(n); }
PR_IMPLEMENT(PRUint32) PR_htonl(PRUint32 n) { return htonl(n); }
PR_IMPLEMENT(PRUint64) PR_ntohll(PRUint64 n)
{
#ifdef IS_BIG_ENDIAN
return n;
#else
PRUint64 tmp;
PRUint32 hi, lo;
LL_L2UI(lo, n);
LL_SHR(tmp, n, 32);
LL_L2UI(hi, tmp);
hi = PR_ntohl(hi);
lo = PR_ntohl(lo);
LL_UI2L(n, lo);
LL_SHL(n, n, 32);
LL_UI2L(tmp, hi);
LL_ADD(n, n, tmp);
return n;
#endif
} /* ntohll */
PR_IMPLEMENT(PRUint64) PR_htonll(PRUint64 n)
{
#ifdef IS_BIG_ENDIAN
return n;
#else
PRUint64 tmp;
PRUint32 hi, lo;
LL_L2UI(lo, n);
LL_SHR(tmp, n, 32);
LL_L2UI(hi, tmp);
hi = htonl(hi);
lo = htonl(lo);
LL_UI2L(n, lo);
LL_SHL(n, n, 32);
LL_UI2L(tmp, hi);
LL_ADD(n, n, tmp);
return n;
#endif
} /* htonll */
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