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|
/*
Unix SMB/CIFS implementation.
Character set conversion Extensions
Copyright (C) Igor Vergeichik <iverg@mail.ru> 2001
Copyright (C) Andrew Tridgell 2001
Copyright (C) Simo Sorce 2001
Copyright (C) Martin Pool 2003
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* We can parameterize this if someone complains.... JRA. */
char lp_failed_convert_char(void)
{
return '_';
}
/**
* @file
*
* @brief Character-set conversion routines built on our iconv.
*
* @note Samba's internal character set (at least in the 3.0 series)
* is always the same as the one for the Unix filesystem. It is
* <b>not</b> necessarily UTF-8 and may be different on machines that
* need i18n filenames to be compatible with Unix software. It does
* have to be a superset of ASCII. All multibyte sequences must start
* with a byte with the high bit set.
*
* @sa lib/iconv.c
*/
static smb_iconv_t conv_handles[NUM_CHARSETS][NUM_CHARSETS];
static BOOL conv_silent; /* Should we do a debug if the conversion fails ? */
/**
* Return the name of a charset to give to iconv().
**/
static const char *charset_name(charset_t ch)
{
const char *ret = NULL;
if (ch == CH_UCS2) ret = "UTF-16LE";
else if (ch == CH_UNIX) ret = lp_unix_charset();
else if (ch == CH_DOS) ret = lp_dos_charset();
else if (ch == CH_DISPLAY) ret = lp_display_charset();
else if (ch == CH_UTF8) ret = "UTF8";
#if defined(HAVE_NL_LANGINFO) && defined(CODESET)
if (ret && !strcmp(ret, "LOCALE")) {
const char *ln = NULL;
#ifdef HAVE_SETLOCALE
setlocale(LC_ALL, "");
#endif
ln = nl_langinfo(CODESET);
if (ln) {
/* Check whether the charset name is supported
by iconv */
smb_iconv_t handle = smb_iconv_open(ln,"UCS-2LE");
if (handle == (smb_iconv_t) -1) {
DEBUG(5,("Locale charset '%s' unsupported, using ASCII instead\n", ln));
ln = NULL;
} else {
DEBUG(5,("Substituting charset '%s' for LOCALE\n", ln));
smb_iconv_close(handle);
}
}
ret = ln;
}
#endif
if (!ret || !*ret) ret = "ASCII";
return ret;
}
void lazy_initialize_conv(void)
{
static int initialized = False;
if (!initialized) {
initialized = True;
load_case_tables();
init_iconv();
}
}
/**
* Initialize iconv conversion descriptors.
*
* This is called the first time it is needed, and also called again
* every time the configuration is reloaded, because the charset or
* codepage might have changed.
**/
void init_iconv(void)
{
int c1, c2;
BOOL did_reload = False;
/* so that charset_name() works we need to get the UNIX<->UCS2 going
first */
if (!conv_handles[CH_UNIX][CH_UCS2])
conv_handles[CH_UNIX][CH_UCS2] = smb_iconv_open(charset_name(CH_UCS2), "ASCII");
if (!conv_handles[CH_UCS2][CH_UNIX])
conv_handles[CH_UCS2][CH_UNIX] = smb_iconv_open("ASCII", charset_name(CH_UCS2));
for (c1=0;c1<NUM_CHARSETS;c1++) {
for (c2=0;c2<NUM_CHARSETS;c2++) {
const char *n1 = charset_name((charset_t)c1);
const char *n2 = charset_name((charset_t)c2);
if (conv_handles[c1][c2] &&
strcmp(n1, conv_handles[c1][c2]->from_name) == 0 &&
strcmp(n2, conv_handles[c1][c2]->to_name) == 0)
continue;
did_reload = True;
if (conv_handles[c1][c2])
smb_iconv_close(conv_handles[c1][c2]);
conv_handles[c1][c2] = smb_iconv_open(n2,n1);
if (conv_handles[c1][c2] == (smb_iconv_t)-1) {
DEBUG(0,("init_iconv: Conversion from %s to %s not supported\n",
charset_name((charset_t)c1), charset_name((charset_t)c2)));
if (c1 != CH_UCS2) {
n1 = "ASCII";
}
if (c2 != CH_UCS2) {
n2 = "ASCII";
}
DEBUG(0,("init_iconv: Attempting to replace with conversion from %s to %s\n",
n1, n2 ));
conv_handles[c1][c2] = smb_iconv_open(n2,n1);
if (!conv_handles[c1][c2]) {
DEBUG(0,("init_iconv: Conversion from %s to %s failed", n1, n2));
smb_panic("init_iconv: conv_handle initialization failed.");
}
}
}
}
if (did_reload) {
/* XXX: Does this really get called every time the dos
* codepage changes? */
/* XXX: Is the did_reload test too strict? */
conv_silent = True;
init_doschar_table();
init_valid_table();
conv_silent = False;
}
}
/**
* Convert string from one encoding to another, making error checking etc
* Slow path version - uses (slow) iconv.
*
* @param src pointer to source string (multibyte or singlebyte)
* @param srclen length of the source string in bytes
* @param dest pointer to destination string (multibyte or singlebyte)
* @param destlen maximal length allowed for string
* @param allow_bad_conv determines if a "best effort" conversion is acceptable (never returns errors)
* @returns the number of bytes occupied in the destination
*
* Ensure the srclen contains the terminating zero.
*
**/
static size_t convert_string_internal(charset_t from, charset_t to,
void const *src, size_t srclen,
void *dest, size_t destlen, BOOL allow_bad_conv)
{
size_t i_len, o_len;
size_t retval;
const char* inbuf = (const char*)src;
char* outbuf = (char*)dest;
smb_iconv_t descriptor;
lazy_initialize_conv();
descriptor = conv_handles[from][to];
if (srclen == (size_t)-1) {
if (from == CH_UCS2) {
srclen = (strlen_w((const smb_ucs2_t *)src)+1) * 2;
} else {
srclen = strlen((const char *)src)+1;
}
}
if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) {
if (!conv_silent)
DEBUG(0,("convert_string_internal: Conversion not supported.\n"));
return (size_t)-1;
}
i_len=srclen;
o_len=destlen;
again:
retval = smb_iconv(descriptor, &inbuf, &i_len, &outbuf, &o_len);
if(retval==(size_t)-1) {
const char *reason="unknown error";
switch(errno) {
case EINVAL:
reason="Incomplete multibyte sequence";
if (!conv_silent)
DEBUG(3,("convert_string_internal: Conversion error: %s(%s)\n",reason,inbuf));
if (allow_bad_conv)
goto use_as_is;
break;
case E2BIG:
reason="No more room";
if (!conv_silent) {
if (from == CH_UNIX) {
DEBUG(3,("E2BIG: convert_string(%s,%s): srclen=%u destlen=%u - '%s'\n",
charset_name(from), charset_name(to),
(unsigned int)srclen, (unsigned int)destlen, (const char *)src));
} else {
DEBUG(3,("E2BIG: convert_string(%s,%s): srclen=%u destlen=%u\n",
charset_name(from), charset_name(to),
(unsigned int)srclen, (unsigned int)destlen));
}
}
break;
case EILSEQ:
reason="Illegal multibyte sequence";
if (!conv_silent)
DEBUG(3,("convert_string_internal: Conversion error: %s(%s)\n",reason,inbuf));
if (allow_bad_conv)
goto use_as_is;
break;
default:
if (!conv_silent)
DEBUG(0,("convert_string_internal: Conversion error: %s(%s)\n",reason,inbuf));
break;
}
/* smb_panic(reason); */
}
return destlen-o_len;
use_as_is:
/*
* Conversion not supported. This is actually an error, but there are so
* many misconfigured iconv systems and smb.conf's out there we can't just
* fail. Do a very bad conversion instead.... JRA.
*/
{
if (o_len == 0 || i_len == 0)
return destlen - o_len;
if (from == CH_UCS2 && to != CH_UCS2) {
/* Can't convert from ucs2 to multibyte. Replace with the default fail char. */
if (i_len < 2)
return destlen - o_len;
if (i_len >= 2) {
*outbuf = lp_failed_convert_char();
outbuf++;
o_len--;
inbuf += 2;
i_len -= 2;
}
if (o_len == 0 || i_len == 0)
return destlen - o_len;
/* Keep trying with the next char... */
goto again;
} else if (from != CH_UCS2 && to == CH_UCS2) {
/* Can't convert to ucs2 - just widen by adding the default fail char then zero. */
if (o_len < 2)
return destlen - o_len;
outbuf[0] = lp_failed_convert_char();
outbuf[1] = '\0';
inbuf++;
i_len--;
outbuf += 2;
o_len -= 2;
if (o_len == 0 || i_len == 0)
return destlen - o_len;
/* Keep trying with the next char... */
goto again;
} else if (from != CH_UCS2 && to != CH_UCS2) {
/* Failed multibyte to multibyte. Just copy the default fail char and
try again. */
outbuf[0] = lp_failed_convert_char();
inbuf++;
i_len--;
outbuf++;
o_len--;
if (o_len == 0 || i_len == 0)
return destlen - o_len;
/* Keep trying with the next char... */
goto again;
} else {
/* Keep compiler happy.... */
return destlen - o_len;
}
}
}
/**
* Convert string from one encoding to another, making error checking etc
* Fast path version - handles ASCII first.
*
* @param src pointer to source string (multibyte or singlebyte)
* @param srclen length of the source string in bytes, or -1 for nul terminated.
* @param dest pointer to destination string (multibyte or singlebyte)
* @param destlen maximal length allowed for string - *NEVER* -1.
* @param allow_bad_conv determines if a "best effort" conversion is acceptable (never returns errors)
* @returns the number of bytes occupied in the destination
*
* Ensure the srclen contains the terminating zero.
*
* This function has been hand-tuned to provide a fast path.
* Don't change unless you really know what you are doing. JRA.
**/
size_t convert_string(charset_t from, charset_t to,
void const *src, size_t srclen,
void *dest, size_t destlen, BOOL allow_bad_conv)
{
/*
* NB. We deliberately don't do a strlen here if srclen == -1.
* This is very expensive over millions of calls and is taken
* care of in the slow path in convert_string_internal. JRA.
*/
#ifdef DEVELOPER
SMB_ASSERT(destlen != (size_t)-1);
#endif
if (srclen == 0)
return 0;
if (from != CH_UCS2 && to != CH_UCS2) {
const unsigned char *p = (const unsigned char *)src;
unsigned char *q = (unsigned char *)dest;
size_t slen = srclen;
size_t dlen = destlen;
unsigned char lastp;
size_t retval = 0;
/* If all characters are ascii, fast path here. */
while (slen && dlen) {
if ((lastp = *p) <= 0x7f) {
*q++ = *p++;
if (slen != (size_t)-1) {
slen--;
}
dlen--;
retval++;
if (!lastp)
break;
} else {
#ifdef BROKEN_UNICODE_COMPOSE_CHARACTERS
goto general_case;
#else
return retval + convert_string_internal(from, to, p, slen, q, dlen, allow_bad_conv);
#endif
}
}
return retval;
} else if (from == CH_UCS2 && to != CH_UCS2) {
const unsigned char *p = (const unsigned char *)src;
unsigned char *q = (unsigned char *)dest;
size_t retval = 0;
size_t slen = srclen;
size_t dlen = destlen;
unsigned char lastp;
/* If all characters are ascii, fast path here. */
while (((slen == (size_t)-1) || (slen >= 2)) && dlen) {
if (((lastp = *p) <= 0x7f) && (p[1] == 0)) {
*q++ = *p;
if (slen != (size_t)-1) {
slen -= 2;
}
p += 2;
dlen--;
retval++;
if (!lastp)
break;
} else {
#ifdef BROKEN_UNICODE_COMPOSE_CHARACTERS
goto general_case;
#else
return retval + convert_string_internal(from, to, p, slen, q, dlen, allow_bad_conv);
#endif
}
}
return retval;
} else if (from != CH_UCS2 && to == CH_UCS2) {
const unsigned char *p = (const unsigned char *)src;
unsigned char *q = (unsigned char *)dest;
size_t retval = 0;
size_t slen = srclen;
size_t dlen = destlen;
unsigned char lastp;
/* If all characters are ascii, fast path here. */
while (slen && (dlen >= 2)) {
if ((lastp = *p) <= 0x7F) {
*q++ = *p++;
*q++ = '\0';
if (slen != (size_t)-1) {
slen--;
}
dlen -= 2;
retval += 2;
if (!lastp)
break;
} else {
#ifdef BROKEN_UNICODE_COMPOSE_CHARACTERS
goto general_case;
#else
return retval + convert_string_internal(from, to, p, slen, q, dlen, allow_bad_conv);
#endif
}
}
return retval;
}
#ifdef BROKEN_UNICODE_COMPOSE_CHARACTERS
general_case:
#endif
return convert_string_internal(from, to, src, srclen, dest, destlen, allow_bad_conv);
}
/**
* Convert between character sets, allocating a new buffer for the result.
*
* @param ctx TALLOC_CTX to use to allocate with. If NULL use malloc.
* @param srclen length of source buffer.
* @param dest always set at least to NULL
* @note -1 is not accepted for srclen.
*
* @returns Size in bytes of the converted string; or -1 in case of error.
*
* Ensure the srclen contains the terminating zero.
*
* I hate the goto's in this function. It's embarressing.....
* There has to be a cleaner way to do this. JRA.
**/
size_t convert_string_allocate(TALLOC_CTX *ctx, charset_t from, charset_t to,
void const *src, size_t srclen, void **dest, BOOL allow_bad_conv)
{
size_t i_len, o_len, destlen = MAX(srclen, 512);
size_t retval;
const char *inbuf = (const char *)src;
char *outbuf = NULL, *ob = NULL;
smb_iconv_t descriptor;
*dest = NULL;
if (src == NULL || srclen == (size_t)-1)
return (size_t)-1;
if (srclen == 0)
return 0;
lazy_initialize_conv();
descriptor = conv_handles[from][to];
if (descriptor == (smb_iconv_t)-1 || descriptor == (smb_iconv_t)0) {
if (!conv_silent)
DEBUG(0,("convert_string_allocate: Conversion not supported.\n"));
return (size_t)-1;
}
convert:
if ((destlen*2) < destlen) {
/* wrapped ! abort. */
if (!conv_silent)
DEBUG(0, ("convert_string_allocate: destlen wrapped !\n"));
if (!ctx)
SAFE_FREE(outbuf);
return (size_t)-1;
} else {
destlen = destlen * 2;
}
if (ctx)
ob = (char *)talloc_realloc(ctx, ob, destlen);
else
ob = (char *)Realloc(ob, destlen);
if (!ob) {
DEBUG(0, ("convert_string_allocate: realloc failed!\n"));
if (!ctx)
SAFE_FREE(outbuf);
return (size_t)-1;
} else {
outbuf = ob;
}
i_len = srclen;
o_len = destlen;
again:
retval = smb_iconv(descriptor,
&inbuf, &i_len,
&outbuf, &o_len);
if(retval == (size_t)-1) {
const char *reason="unknown error";
switch(errno) {
case EINVAL:
reason="Incomplete multibyte sequence";
if (!conv_silent)
DEBUG(3,("convert_string_allocate: Conversion error: %s(%s)\n",reason,inbuf));
if (allow_bad_conv)
goto use_as_is;
break;
case E2BIG:
goto convert;
case EILSEQ:
reason="Illegal multibyte sequence";
if (!conv_silent)
DEBUG(3,("convert_string_allocate: Conversion error: %s(%s)\n",reason,inbuf));
if (allow_bad_conv)
goto use_as_is;
break;
}
if (!conv_silent)
DEBUG(0,("Conversion error: %s(%s)\n",reason,inbuf));
/* smb_panic(reason); */
return (size_t)-1;
}
out:
destlen = destlen - o_len;
if (ctx)
*dest = (char *)talloc_realloc(ctx,ob,destlen);
else
*dest = (char *)Realloc(ob,destlen);
if (destlen && !*dest) {
DEBUG(0, ("convert_string_allocate: out of memory!\n"));
if (!ctx)
SAFE_FREE(ob);
return (size_t)-1;
}
return destlen;
use_as_is:
/*
* Conversion not supported. This is actually an error, but there are so
* many misconfigured iconv systems and smb.conf's out there we can't just
* fail. Do a very bad conversion instead.... JRA.
*/
{
if (o_len == 0 || i_len == 0)
goto out;
if (from == CH_UCS2 && to != CH_UCS2) {
/* Can't convert from ucs2 to multibyte. Just use the default fail char. */
if (i_len < 2)
goto out;
if (i_len >= 2) {
*outbuf = lp_failed_convert_char();
outbuf++;
o_len--;
inbuf += 2;
i_len -= 2;
}
if (o_len == 0 || i_len == 0)
goto out;
/* Keep trying with the next char... */
goto again;
} else if (from != CH_UCS2 && to == CH_UCS2) {
/* Can't convert to ucs2 - just widen by adding the default fail char then zero. */
if (o_len < 2)
goto out;
outbuf[0] = lp_failed_convert_char();
outbuf[1] = '\0';
inbuf++;
i_len--;
outbuf += 2;
o_len -= 2;
if (o_len == 0 || i_len == 0)
goto out;
/* Keep trying with the next char... */
goto again;
} else if (from != CH_UCS2 && to != CH_UCS2) {
/* Failed multibyte to multibyte. Just copy the default fail char and
try again. */
outbuf[0] = lp_failed_convert_char();
inbuf++;
i_len--;
outbuf++;
o_len--;
if (o_len == 0 || i_len == 0)
goto out;
/* Keep trying with the next char... */
goto again;
} else {
/* Keep compiler happy.... */
goto out;
}
}
}
/**
* Convert between character sets, allocating a new buffer using talloc for the result.
*
* @param srclen length of source buffer.
* @param dest always set at least to NULL
* @note -1 is not accepted for srclen.
*
* @returns Size in bytes of the converted string; or -1 in case of error.
**/
static size_t convert_string_talloc(TALLOC_CTX *ctx, charset_t from, charset_t to,
void const *src, size_t srclen, void **dest, BOOL allow_bad_conv)
{
size_t dest_len;
*dest = NULL;
dest_len=convert_string_allocate(ctx, from, to, src, srclen, dest, allow_bad_conv);
if (dest_len == (size_t)-1)
return (size_t)-1;
if (*dest == NULL)
return (size_t)-1;
return dest_len;
}
size_t unix_strupper(const char *src, size_t srclen, char *dest, size_t destlen)
{
size_t size;
smb_ucs2_t *buffer;
size = push_ucs2_allocate(&buffer, src);
if (size == (size_t)-1) {
smb_panic("failed to create UCS2 buffer");
}
if (!strupper_w(buffer) && (dest == src)) {
free(buffer);
return srclen;
}
size = convert_string(CH_UCS2, CH_UNIX, buffer, size, dest, destlen, True);
free(buffer);
return size;
}
/**
strdup() a unix string to upper case.
Max size is pstring.
**/
char *strdup_upper(const char *s)
{
pstring out_buffer;
const unsigned char *p = (const unsigned char *)s;
unsigned char *q = (unsigned char *)out_buffer;
/* this is quite a common operation, so we want it to be
fast. We optimise for the ascii case, knowing that all our
supported multi-byte character sets are ascii-compatible
(ie. they match for the first 128 chars) */
while (1) {
if (*p & 0x80)
break;
*q++ = toupper(*p);
if (!*p)
break;
p++;
if (p - ( const unsigned char *)s >= sizeof(pstring))
break;
}
if (*p) {
/* MB case. */
size_t size;
wpstring buffer;
size = convert_string(CH_UNIX, CH_UCS2, s, -1, buffer, sizeof(buffer), True);
if (size == (size_t)-1) {
return NULL;
}
strupper_w(buffer);
size = convert_string(CH_UCS2, CH_UNIX, buffer, -1, out_buffer, sizeof(out_buffer), True);
if (size == (size_t)-1) {
return NULL;
}
}
return strdup(out_buffer);
}
size_t unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen)
{
size_t size;
smb_ucs2_t *buffer = NULL;
size = convert_string_allocate(NULL, CH_UNIX, CH_UCS2, src, srclen,
(void **) &buffer, True);
if (size == (size_t)-1 || !buffer) {
smb_panic("failed to create UCS2 buffer");
}
if (!strlower_w(buffer) && (dest == src)) {
SAFE_FREE(buffer);
return srclen;
}
size = convert_string(CH_UCS2, CH_UNIX, buffer, size, dest, destlen, True);
SAFE_FREE(buffer);
return size;
}
/**
strdup() a unix string to lower case.
**/
char *strdup_lower(const char *s)
{
size_t size;
smb_ucs2_t *buffer = NULL;
char *out_buffer;
size = push_ucs2_allocate(&buffer, s);
if (size == -1 || !buffer) {
return NULL;
}
strlower_w(buffer);
size = pull_ucs2_allocate(&out_buffer, buffer);
SAFE_FREE(buffer);
if (size == (size_t)-1) {
return NULL;
}
return out_buffer;
}
static size_t ucs2_align(const void *base_ptr, const void *p, int flags)
{
if (flags & (STR_NOALIGN|STR_ASCII))
return 0;
return PTR_DIFF(p, base_ptr) & 1;
}
/**
* Copy a string from a char* unix src to a dos codepage string destination.
*
* @return the number of bytes occupied by the string in the destination.
*
* @param flags can include
* <dl>
* <dt>STR_TERMINATE</dt> <dd>means include the null termination</dd>
* <dt>STR_UPPER</dt> <dd>means uppercase in the destination</dd>
* </dl>
*
* @param dest_len the maximum length in bytes allowed in the
* destination. If @p dest_len is -1 then no maximum is used.
**/
size_t push_ascii(void *dest, const char *src, size_t dest_len, int flags)
{
size_t src_len = strlen(src);
pstring tmpbuf;
/* treat a pstring as "unlimited" length */
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_UPPER) {
pstrcpy(tmpbuf, src);
strupper_m(tmpbuf);
src = tmpbuf;
}
if (flags & (STR_TERMINATE | STR_TERMINATE_ASCII))
src_len++;
return convert_string(CH_UNIX, CH_DOS, src, src_len, dest, dest_len, True);
}
size_t push_ascii_fstring(void *dest, const char *src)
{
return push_ascii(dest, src, sizeof(fstring), STR_TERMINATE);
}
size_t push_ascii_pstring(void *dest, const char *src)
{
return push_ascii(dest, src, sizeof(pstring), STR_TERMINATE);
}
/********************************************************************
Push an nstring - ensure null terminated. Written by
moriyama@miraclelinux.com (MORIYAMA Masayuki).
********************************************************************/
size_t push_ascii_nstring(void *dest, const char *src)
{
size_t i, buffer_len, dest_len;
smb_ucs2_t *buffer;
conv_silent = True;
buffer_len = push_ucs2_allocate(&buffer, src);
if (buffer_len == (size_t)-1) {
smb_panic("failed to create UCS2 buffer");
}
/* We're using buffer_len below to count ucs2 characters, not bytes. */
buffer_len /= sizeof(smb_ucs2_t);
dest_len = 0;
for (i = 0; buffer[i] != 0 && (i < buffer_len); i++) {
unsigned char mb[10];
/* Convert one smb_ucs2_t character at a time. */
size_t mb_len = convert_string(CH_UCS2, CH_DOS, buffer+i, sizeof(smb_ucs2_t), mb, sizeof(mb), False);
if ((mb_len != (size_t)-1) && (dest_len + mb_len <= MAX_NETBIOSNAME_LEN - 1)) {
memcpy((char *)dest + dest_len, mb, mb_len);
dest_len += mb_len;
} else {
errno = E2BIG;
break;
}
}
((char *)dest)[dest_len] = '\0';
SAFE_FREE(buffer);
conv_silent = False;
return dest_len;
}
/**
* Copy a string from a dos codepage source to a unix char* destination.
*
* The resulting string in "dest" is always null terminated.
*
* @param flags can have:
* <dl>
* <dt>STR_TERMINATE</dt>
* <dd>STR_TERMINATE means the string in @p src
* is null terminated, and src_len is ignored.</dd>
* </dl>
*
* @param src_len is the length of the source area in bytes.
* @returns the number of bytes occupied by the string in @p src.
**/
size_t pull_ascii(char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
{
size_t ret;
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_TERMINATE) {
if (src_len == (size_t)-1) {
src_len = strlen(src) + 1;
} else {
size_t len = strnlen(src, src_len);
if (len < src_len)
len++;
src_len = len;
}
}
ret = convert_string(CH_DOS, CH_UNIX, src, src_len, dest, dest_len, True);
if (ret == (size_t)-1) {
dest_len = 0;
}
if (dest_len)
dest[MIN(ret, dest_len-1)] = 0;
else
dest[0] = 0;
return src_len;
}
size_t pull_ascii_pstring(char *dest, const void *src)
{
return pull_ascii(dest, src, sizeof(pstring), -1, STR_TERMINATE);
}
size_t pull_ascii_fstring(char *dest, const void *src)
{
return pull_ascii(dest, src, sizeof(fstring), -1, STR_TERMINATE);
}
/* When pulling an nstring it can expand into a larger size (dos cp -> utf8). Cope with this. */
size_t pull_ascii_nstring(char *dest, size_t dest_len, const void *src)
{
return pull_ascii(dest, src, dest_len, sizeof(nstring)-1, STR_TERMINATE);
}
/**
* Copy a string from a char* src to a unicode destination.
*
* @returns the number of bytes occupied by the string in the destination.
*
* @param flags can have:
*
* <dl>
* <dt>STR_TERMINATE <dd>means include the null termination.
* <dt>STR_UPPER <dd>means uppercase in the destination.
* <dt>STR_NOALIGN <dd>means don't do alignment.
* </dl>
*
* @param dest_len is the maximum length allowed in the
* destination. If dest_len is -1 then no maxiumum is used.
**/
size_t push_ucs2(const void *base_ptr, void *dest, const char *src, size_t dest_len, int flags)
{
size_t len=0;
size_t src_len;
size_t ret;
/* treat a pstring as "unlimited" length */
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_TERMINATE)
src_len = (size_t)-1;
else
src_len = strlen(src);
if (ucs2_align(base_ptr, dest, flags)) {
*(char *)dest = 0;
dest = (void *)((char *)dest + 1);
if (dest_len)
dest_len--;
len++;
}
/* ucs2 is always a multiple of 2 bytes */
dest_len &= ~1;
ret = convert_string(CH_UNIX, CH_UCS2, src, src_len, dest, dest_len, True);
if (ret == (size_t)-1) {
return 0;
}
len += ret;
if (flags & STR_UPPER) {
smb_ucs2_t *dest_ucs2 = dest;
size_t i;
for (i = 0; i < (dest_len / 2) && dest_ucs2[i]; i++) {
smb_ucs2_t v = toupper_w(dest_ucs2[i]);
if (v != dest_ucs2[i]) {
dest_ucs2[i] = v;
}
}
}
return len;
}
/**
* Copy a string from a unix char* src to a UCS2 destination,
* allocating a buffer using talloc().
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
* or -1 in case of error.
**/
size_t push_ucs2_talloc(TALLOC_CTX *ctx, smb_ucs2_t **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_talloc(ctx, CH_UNIX, CH_UCS2, src, src_len, (void **)dest, True);
}
/**
* Copy a string from a unix char* src to a UCS2 destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
* or -1 in case of error.
**/
size_t push_ucs2_allocate(smb_ucs2_t **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_allocate(NULL, CH_UNIX, CH_UCS2, src, src_len, (void **)dest, True);
}
/**
Copy a string from a char* src to a UTF-8 destination.
Return the number of bytes occupied by the string in the destination
Flags can have:
STR_TERMINATE means include the null termination
STR_UPPER means uppercase in the destination
dest_len is the maximum length allowed in the destination. If dest_len
is -1 then no maxiumum is used.
**/
static size_t push_utf8(void *dest, const char *src, size_t dest_len, int flags)
{
size_t src_len = strlen(src);
pstring tmpbuf;
/* treat a pstring as "unlimited" length */
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (flags & STR_UPPER) {
pstrcpy(tmpbuf, src);
strupper_m(tmpbuf);
src = tmpbuf;
}
if (flags & STR_TERMINATE)
src_len++;
return convert_string(CH_UNIX, CH_UTF8, src, src_len, dest, dest_len, True);
}
size_t push_utf8_fstring(void *dest, const char *src)
{
return push_utf8(dest, src, sizeof(fstring), STR_TERMINATE);
}
/**
* Copy a string from a unix char* src to a UTF-8 destination, allocating a buffer using talloc
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t push_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_talloc(ctx, CH_UNIX, CH_UTF8, src, src_len, (void**)dest, True);
}
/**
* Copy a string from a unix char* src to a UTF-8 destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t push_utf8_allocate(char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_allocate(NULL, CH_UNIX, CH_UTF8, src, src_len, (void **)dest, True);
}
/**
Copy a string from a ucs2 source to a unix char* destination.
Flags can have:
STR_TERMINATE means the string in src is null terminated.
STR_NOALIGN means don't try to align.
if STR_TERMINATE is set then src_len is ignored if it is -1.
src_len is the length of the source area in bytes
Return the number of bytes occupied by the string in src.
The resulting string in "dest" is always null terminated.
**/
size_t pull_ucs2(const void *base_ptr, char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
{
size_t ret;
if (dest_len == (size_t)-1)
dest_len = sizeof(pstring);
if (ucs2_align(base_ptr, src, flags)) {
src = (const void *)((const char *)src + 1);
if (src_len != (size_t)-1)
src_len--;
}
if (flags & STR_TERMINATE) {
/* src_len -1 is the default for null terminated strings. */
if (src_len != (size_t)-1) {
size_t len = strnlen_w(src, src_len/2);
if (len < src_len/2)
len++;
src_len = len*2;
}
}
/* ucs2 is always a multiple of 2 bytes */
if (src_len != (size_t)-1)
src_len &= ~1;
ret = convert_string(CH_UCS2, CH_UNIX, src, src_len, dest, dest_len, True);
if (ret == (size_t)-1) {
return 0;
}
if (src_len == (size_t)-1)
src_len = ret*2;
if (dest_len)
dest[MIN(ret, dest_len-1)] = 0;
else
dest[0] = 0;
return src_len;
}
size_t pull_ucs2_pstring(char *dest, const void *src)
{
return pull_ucs2(NULL, dest, src, sizeof(pstring), -1, STR_TERMINATE);
}
size_t pull_ucs2_fstring(char *dest, const void *src)
{
return pull_ucs2(NULL, dest, src, sizeof(fstring), -1, STR_TERMINATE);
}
/**
* Copy a string from a UCS2 src to a unix char * destination, allocating a buffer using talloc
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_ucs2_talloc(TALLOC_CTX *ctx, char **dest, const smb_ucs2_t *src)
{
size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t);
*dest = NULL;
return convert_string_talloc(ctx, CH_UCS2, CH_UNIX, src, src_len, (void **)dest, True);
}
/**
* Copy a string from a UCS2 src to a unix char * destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_ucs2_allocate(char **dest, const smb_ucs2_t *src)
{
size_t src_len = (strlen_w(src)+1) * sizeof(smb_ucs2_t);
*dest = NULL;
return convert_string_allocate(NULL, CH_UCS2, CH_UNIX, src, src_len, (void **)dest, True);
}
/**
* Copy a string from a UTF-8 src to a unix char * destination, allocating a buffer using talloc
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_utf8_talloc(TALLOC_CTX *ctx, char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_talloc(ctx, CH_UTF8, CH_UNIX, src, src_len, (void **)dest, True);
}
/**
* Copy a string from a UTF-8 src to a unix char * destination, allocating a buffer
*
* @param dest always set at least to NULL
*
* @returns The number of bytes occupied by the string in the destination
**/
size_t pull_utf8_allocate(char **dest, const char *src)
{
size_t src_len = strlen(src)+1;
*dest = NULL;
return convert_string_allocate(NULL, CH_UTF8, CH_UNIX, src, src_len, (void **)dest, True);
}
/**
Copy a string from a char* src to a unicode or ascii
dos codepage destination choosing unicode or ascii based on the
flags in the SMB buffer starting at base_ptr.
Return the number of bytes occupied by the string in the destination.
flags can have:
STR_TERMINATE means include the null termination.
STR_UPPER means uppercase in the destination.
STR_ASCII use ascii even with unicode packet.
STR_NOALIGN means don't do alignment.
dest_len is the maximum length allowed in the destination. If dest_len
is -1 then no maxiumum is used.
**/
size_t push_string_fn(const char *function, unsigned int line, const void *base_ptr, void *dest, const char *src, size_t dest_len, int flags)
{
#ifdef DEVELOPER
/* We really need to zero fill here, not clobber
* region, as we want to ensure that valgrind thinks
* all of the outgoing buffer has been written to
* so a send() or write() won't trap an error.
* JRA.
*/
#if 0
if (dest_len != (size_t)-1)
clobber_region(function, line, dest, dest_len);
#else
if (dest_len != (size_t)-1)
memset(dest, '\0', dest_len);
#endif
#endif
if (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(base_ptr, smb_flg2) & FLAGS2_UNICODE_STRINGS)))) {
return push_ucs2(base_ptr, dest, src, dest_len, flags);
}
return push_ascii(dest, src, dest_len, flags);
}
/**
Copy a string from a unicode or ascii source (depending on
the packet flags) to a char* destination.
Flags can have:
STR_TERMINATE means the string in src is null terminated.
STR_UNICODE means to force as unicode.
STR_ASCII use ascii even with unicode packet.
STR_NOALIGN means don't do alignment.
if STR_TERMINATE is set then src_len is ignored is it is -1
src_len is the length of the source area in bytes.
Return the number of bytes occupied by the string in src.
The resulting string in "dest" is always null terminated.
**/
size_t pull_string_fn(const char *function, unsigned int line, const void *base_ptr, char *dest, const void *src, size_t dest_len, size_t src_len, int flags)
{
#ifdef DEVELOPER
if (dest_len != (size_t)-1)
clobber_region(function, line, dest, dest_len);
#endif
if (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(base_ptr, smb_flg2) & FLAGS2_UNICODE_STRINGS)))) {
return pull_ucs2(base_ptr, dest, src, dest_len, src_len, flags);
}
return pull_ascii(dest, src, dest_len, src_len, flags);
}
size_t align_string(const void *base_ptr, const char *p, int flags)
{
if (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(base_ptr, smb_flg2) & FLAGS2_UNICODE_STRINGS)))) {
return ucs2_align(base_ptr, p, flags);
}
return 0;
}
/****************************************************************
Calculate the size (in bytes) of the next multibyte character in
our internal character set. Note that p must be pointing to a
valid mb char, not within one.
****************************************************************/
size_t next_mb_char_size(const char *s)
{
size_t i;
if (!(*s & 0x80))
return 1; /* ascii. */
conv_silent = True;
for ( i = 1; i <=4; i++ ) {
smb_ucs2_t uc;
if (convert_string(CH_UNIX, CH_UCS2, s, i, &uc, 2, False) == 2) {
#if 0 /* JRATEST */
DEBUG(10,("next_mb_char_size: size %u at string %s\n",
(unsigned int)i, s));
#endif
conv_silent = False;
return i;
}
}
/* We're hosed - we don't know how big this is... */
DEBUG(10,("next_mb_char_size: unknown size at string %s\n", s));
conv_silent = False;
return 1;
}
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