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/*
Unix SMB/CIFS implementation.
routines for marshalling/unmarshalling string types
Copyright (C) Andrew Tridgell 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"
#include "system/network.h"
/*
pull a general string from the wire
*/
NTSTATUS ndr_pull_string(struct ndr_pull *ndr, int ndr_flags, const char **s)
{
char *as=NULL;
uint32_t len1, ofs, len2;
uint16_t len3;
int ret;
int chset = CH_UTF16;
unsigned byte_mul = 2;
unsigned flags = ndr->flags;
unsigned c_len_term = 0;
if (!(ndr_flags & NDR_SCALARS)) {
return NT_STATUS_OK;
}
if (NDR_BE(ndr)) {
chset = CH_UTF16BE;
}
if (flags & LIBNDR_FLAG_STR_ASCII) {
chset = CH_DOS;
byte_mul = 1;
flags &= ~LIBNDR_FLAG_STR_ASCII;
}
if (flags & LIBNDR_FLAG_STR_UTF8) {
chset = CH_UTF8;
byte_mul = 1;
flags &= ~LIBNDR_FLAG_STR_UTF8;
}
flags &= ~LIBNDR_FLAG_STR_CONFORMANT;
if (flags & LIBNDR_FLAG_STR_CHARLEN) {
c_len_term = 1;
flags &= ~LIBNDR_FLAG_STR_CHARLEN;
}
switch (flags & LIBNDR_STRING_FLAGS) {
case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4:
case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs));
if (ofs != 0) {
return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n",
ndr->flags & LIBNDR_STRING_FLAGS);
}
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len2));
if (len2 > len1) {
return ndr_pull_error(ndr, NDR_ERR_STRING,
"Bad string lengths len1=%u ofs=%u len2=%u\n",
len1, ofs, len2);
}
if (len2 == 0) {
*s = talloc_strdup(ndr, "");
break;
}
NDR_PULL_NEED_BYTES(ndr, (len2 + c_len_term)*byte_mul);
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
(len2 + c_len_term)*byte_mul,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, (len2 + c_len_term)*byte_mul));
/* this is a way of detecting if a string is sent with the wrong
termination */
if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
if (strlen(as) < (len2 + c_len_term)) {
DEBUG(6,("short string '%s'\n", as));
}
} else {
if (strlen(as) == (len2 + c_len_term)) {
DEBUG(6,("long string '%s'\n", as));
}
}
*s = as;
break;
case LIBNDR_FLAG_STR_SIZE4:
case LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul);
if (len1 == 0) {
*s = talloc_strdup(ndr, "");
break;
}
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
(len1 + c_len_term)*byte_mul,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul));
/* this is a way of detecting if a string is sent with the wrong
termination */
if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
if (strlen(as) < (len1 + c_len_term)) {
DEBUG(6,("short string '%s'\n", as));
}
} else {
if (strlen(as) == (len1 + c_len_term)) {
DEBUG(6,("long string '%s'\n", as));
}
}
*s = as;
break;
case LIBNDR_FLAG_STR_LEN4:
case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_NOTERM:
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &ofs));
if (ofs != 0) {
return ndr_pull_error(ndr, NDR_ERR_STRING, "non-zero array offset with string flags 0x%x\n",
ndr->flags & LIBNDR_STRING_FLAGS);
}
NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &len1));
NDR_PULL_NEED_BYTES(ndr, (len1 + c_len_term)*byte_mul);
if (len1 == 0) {
*s = talloc_strdup(ndr, "");
break;
}
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
(len1 + c_len_term)*byte_mul,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, (len1 + c_len_term)*byte_mul));
/* this is a way of detecting if a string is sent with the wrong
termination */
if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
if (strlen(as) < (len1 + c_len_term)) {
DEBUG(6,("short string '%s'\n", as));
}
} else {
if (strlen(as) == (len1 + c_len_term)) {
DEBUG(6,("long string '%s'\n", as));
}
}
*s = as;
break;
case LIBNDR_FLAG_STR_SIZE2:
case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM:
NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3));
NDR_PULL_NEED_BYTES(ndr, (len3 + c_len_term)*byte_mul);
if (len3 == 0) {
*s = talloc_strdup(ndr, "");
break;
}
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
(len3 + c_len_term)*byte_mul,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, (len3 + c_len_term)*byte_mul));
/* this is a way of detecting if a string is sent with the wrong
termination */
if (ndr->flags & LIBNDR_FLAG_STR_NOTERM) {
if (strlen(as) < (len3 + c_len_term)) {
DEBUG(6,("short string '%s'\n", as));
}
} else {
if (strlen(as) == (len3 + c_len_term)) {
DEBUG(6,("long string '%s'\n", as));
}
}
*s = as;
break;
case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_STR_BYTESIZE:
NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &len3));
NDR_PULL_NEED_BYTES(ndr, len3);
if (len3 == 0) {
*s = talloc_strdup(ndr, "");
break;
}
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
len3,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, len3));
*s = as;
break;
case LIBNDR_FLAG_STR_NULLTERM:
if (byte_mul == 1) {
len1 = ascii_len_n((const char *)(ndr->data+ndr->offset), ndr->data_size - ndr->offset);
} else {
len1 = utf16_len_n(ndr->data+ndr->offset, ndr->data_size - ndr->offset);
}
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
len1,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, len1));
*s = as;
break;
case LIBNDR_FLAG_STR_FIXLEN15:
case LIBNDR_FLAG_STR_FIXLEN32:
len1 = (flags & LIBNDR_FLAG_STR_FIXLEN32)?32:15;
NDR_PULL_NEED_BYTES(ndr, len1*byte_mul);
ret = convert_string_talloc(ndr, chset, CH_UNIX,
ndr->data+ndr->offset,
len1*byte_mul,
(void **)&as);
if (ret == -1) {
return ndr_pull_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
NDR_CHECK(ndr_pull_advance(ndr, len1*byte_mul));
*s = as;
break;
default:
return ndr_pull_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
ndr->flags & LIBNDR_STRING_FLAGS);
}
return NT_STATUS_OK;
}
/*
push a general string onto the wire
*/
NTSTATUS ndr_push_string(struct ndr_push *ndr, int ndr_flags, const char *s)
{
ssize_t s_len, c_len, d_len;
int ret;
int chset = CH_UTF16;
unsigned flags = ndr->flags;
unsigned byte_mul = 2;
unsigned c_len_term = 1;
if (!(ndr_flags & NDR_SCALARS)) {
return NT_STATUS_OK;
}
if (NDR_BE(ndr)) {
chset = CH_UTF16BE;
}
s_len = s?strlen(s):0;
c_len = s?strlen_m(s):0;
if (flags & LIBNDR_FLAG_STR_ASCII) {
chset = CH_DOS;
byte_mul = 1;
flags &= ~LIBNDR_FLAG_STR_ASCII;
}
if (flags & LIBNDR_FLAG_STR_UTF8) {
chset = CH_UTF8;
byte_mul = 1;
flags &= ~LIBNDR_FLAG_STR_UTF8;
}
flags &= ~LIBNDR_FLAG_STR_CONFORMANT;
if (flags & LIBNDR_FLAG_STR_CHARLEN) {
c_len_term = 0;
flags &= ~LIBNDR_FLAG_STR_CHARLEN;
}
switch (flags & LIBNDR_STRING_FLAGS) {
case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4:
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len+c_len_term));
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len+c_len_term));
NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1));
ret = convert_string(CH_UNIX, chset,
s, s_len+1,
ndr->data+ndr->offset,
byte_mul*(c_len+1));
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*(c_len+1);
break;
case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_SIZE4|LIBNDR_FLAG_STR_NOTERM:
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
NDR_PUSH_NEED_BYTES(ndr, c_len*byte_mul);
ret = convert_string(CH_UNIX, chset,
s, s_len,
ndr->data+ndr->offset, c_len*byte_mul);
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += c_len*byte_mul;
break;
case LIBNDR_FLAG_STR_LEN4:
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len + c_len_term));
NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1));
ret = convert_string(CH_UNIX, chset,
s, s_len + 1,
ndr->data+ndr->offset, byte_mul*(c_len+1));
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*(c_len+1);
break;
case LIBNDR_FLAG_STR_LEN4|LIBNDR_FLAG_STR_NOTERM:
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len));
NDR_PUSH_NEED_BYTES(ndr, byte_mul*c_len);
ret = convert_string(CH_UNIX, chset,
s, s_len,
ndr->data+ndr->offset, byte_mul*c_len);
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*c_len;
break;
case LIBNDR_FLAG_STR_SIZE4:
NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, c_len + c_len_term));
NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1));
ret = convert_string(CH_UNIX, chset,
s, s_len + 1,
ndr->data+ndr->offset, byte_mul*(c_len+1));
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*(c_len+1);
break;
case LIBNDR_FLAG_STR_SIZE2:
NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, c_len + c_len_term));
NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1));
ret = convert_string(CH_UNIX, chset,
s, s_len + 1,
ndr->data+ndr->offset, byte_mul*(c_len+1));
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*(c_len+1);
break;
case LIBNDR_FLAG_STR_NULLTERM:
NDR_PUSH_NEED_BYTES(ndr, byte_mul*(c_len+1));
ret = convert_string(CH_UNIX, chset,
s, s_len+1,
ndr->data+ndr->offset, byte_mul*(c_len+1));
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*(c_len+1);
break;
case LIBNDR_FLAG_STR_SIZE2|LIBNDR_FLAG_STR_NOTERM|LIBNDR_FLAG_STR_BYTESIZE:
NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, c_len*byte_mul));
NDR_PUSH_NEED_BYTES(ndr, c_len*byte_mul);
ret = convert_string(CH_UNIX, chset,
s, s_len,
ndr->data+ndr->offset, c_len*byte_mul);
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += c_len*byte_mul;
break;
case LIBNDR_FLAG_STR_FIXLEN15:
case LIBNDR_FLAG_STR_FIXLEN32:
d_len = (flags & LIBNDR_FLAG_STR_FIXLEN32)?32:15;
NDR_PUSH_NEED_BYTES(ndr, byte_mul*d_len);
ret = convert_string(CH_UNIX, chset,
s, s_len,
ndr->data+ndr->offset, byte_mul*d_len);
if (ret == -1) {
return ndr_push_error(ndr, NDR_ERR_CHARCNV,
"Bad character conversion");
}
ndr->offset += byte_mul*d_len;
break;
default:
return ndr_push_error(ndr, NDR_ERR_STRING, "Bad string flags 0x%x\n",
ndr->flags & LIBNDR_STRING_FLAGS);
}
return NT_STATUS_OK;
}
/*
push a general string onto the wire
*/
size_t ndr_string_array_size(struct ndr_push *ndr, const char *s)
{
size_t c_len;
unsigned flags = ndr->flags;
unsigned byte_mul = 2;
unsigned c_len_term = 1;
if (flags & LIBNDR_FLAG_STR_FIXLEN32) {
return 32;
}
if (flags & LIBNDR_FLAG_STR_FIXLEN15) {
return 15;
}
c_len = s?strlen_m(s):0;
if (flags & (LIBNDR_FLAG_STR_ASCII|LIBNDR_FLAG_STR_UTF8)) {
byte_mul = 1;
}
if (flags & LIBNDR_FLAG_STR_NOTERM) {
c_len_term = 0;
}
c_len = c_len + c_len_term;
if (flags & LIBNDR_FLAG_STR_BYTESIZE) {
c_len = c_len * byte_mul;
}
return c_len;
}
void ndr_print_string(struct ndr_print *ndr, const char *name, const char *s)
{
if (s) {
ndr->print(ndr, "%-25s: '%s'", name, s);
} else {
ndr->print(ndr, "%-25s: NULL", name);
}
}
uint32_t ndr_size_string(int ret, const char * const* string, int flags)
{
/* FIXME: Is this correct for all strings ? */
if(!(*string)) return ret;
return ret+strlen(*string)+1;
}
|
