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samba-mirror/lib/tdr/tdr.c

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/*
Unix SMB/CIFS implementation.
TDR (Trivial Data Representation) helper functions
Based loosely on ndr.c by Andrew Tridgell.
Copyright (C) Jelmer Vernooij 2005
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/filesys.h"
#include "system/network.h"
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#include "lib/tdr/tdr.h"
#define TDR_BASE_MARSHALL_SIZE 1024
#define TDR_PUSH_NEED_BYTES(tdr, n) TDR_CHECK(tdr_push_expand(tdr, tdr->data.length+(n)))
#define TDR_PULL_NEED_BYTES(tdr, n) do { \
if ((n) > tdr->data.length || tdr->offset + (n) > tdr->data.length) { \
return NT_STATUS_BUFFER_TOO_SMALL; \
} \
} while(0)
#define TDR_BE(tdr) ((tdr)->flags & TDR_BIG_ENDIAN)
#define TDR_CVAL(tdr, ofs) CVAL(tdr->data.data,ofs)
#define TDR_SVAL(tdr, ofs) (TDR_BE(tdr)?RSVAL(tdr->data.data,ofs):SVAL(tdr->data.data,ofs))
#define TDR_IVAL(tdr, ofs) (TDR_BE(tdr)?RIVAL(tdr->data.data,ofs):IVAL(tdr->data.data,ofs))
#define TDR_SCVAL(tdr, ofs, v) SCVAL(tdr->data.data,ofs,v)
#define TDR_SSVAL(tdr, ofs, v) do { if (TDR_BE(tdr)) { RSSVAL(tdr->data.data,ofs,v); } else SSVAL(tdr->data.data,ofs,v); } while (0)
#define TDR_SIVAL(tdr, ofs, v) do { if (TDR_BE(tdr)) { RSIVAL(tdr->data.data,ofs,v); } else SIVAL(tdr->data.data,ofs,v); } while (0)
/**
expand the available space in the buffer to 'size'
*/
NTSTATUS tdr_push_expand(struct tdr_push *tdr, uint32_t size)
{
if (talloc_get_size(tdr->data.data) >= size) {
return NT_STATUS_OK;
}
tdr->data.data = talloc_realloc(tdr, tdr->data.data, uint8_t, tdr->data.length + TDR_BASE_MARSHALL_SIZE);
if (tdr->data.data == NULL)
return NT_STATUS_NO_MEMORY;
return NT_STATUS_OK;
}
NTSTATUS tdr_pull_uint8(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint8_t *v)
{
TDR_PULL_NEED_BYTES(tdr, 1);
*v = TDR_CVAL(tdr, tdr->offset);
tdr->offset += 1;
return NT_STATUS_OK;
}
NTSTATUS tdr_push_uint8(struct tdr_push *tdr, const uint8_t *v)
{
TDR_PUSH_NEED_BYTES(tdr, 1);
TDR_SCVAL(tdr, tdr->data.length, *v);
tdr->data.length += 1;
return NT_STATUS_OK;
}
NTSTATUS tdr_print_uint8(struct tdr_print *tdr, const char *name, uint8_t *v)
{
tdr->print(tdr, "%-25s: 0x%02x (%u)", name, *v, *v);
return NT_STATUS_OK;
}
NTSTATUS tdr_pull_uint16(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint16_t *v)
{
TDR_PULL_NEED_BYTES(tdr, 2);
*v = TDR_SVAL(tdr, tdr->offset);
tdr->offset += 2;
return NT_STATUS_OK;
}
NTSTATUS tdr_push_uint16(struct tdr_push *tdr, const uint16_t *v)
{
TDR_PUSH_NEED_BYTES(tdr, 2);
TDR_SSVAL(tdr, tdr->data.length, *v);
tdr->data.length += 2;
return NT_STATUS_OK;
}
NTSTATUS tdr_print_uint16(struct tdr_print *tdr, const char *name, uint16_t *v)
{
tdr->print(tdr, "%-25s: 0x%02x (%u)", name, *v, *v);
return NT_STATUS_OK;
}
NTSTATUS tdr_pull_uint32(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint32_t *v)
{
TDR_PULL_NEED_BYTES(tdr, 4);
*v = TDR_IVAL(tdr, tdr->offset);
tdr->offset += 4;
return NT_STATUS_OK;
}
NTSTATUS tdr_push_uint32(struct tdr_push *tdr, const uint32_t *v)
{
TDR_PUSH_NEED_BYTES(tdr, 4);
TDR_SIVAL(tdr, tdr->data.length, *v);
tdr->data.length += 4;
return NT_STATUS_OK;
}
NTSTATUS tdr_print_uint32(struct tdr_print *tdr, const char *name, uint32_t *v)
{
tdr->print(tdr, "%-25s: 0x%02x (%u)", name, *v, *v);
return NT_STATUS_OK;
}
NTSTATUS tdr_pull_charset(struct tdr_pull *tdr, TALLOC_CTX *ctx, const char **v, uint32_t length, uint32_t el_size, charset_t chset)
{
size_t ret;
if (length == -1) {
switch (chset) {
case CH_DOS:
length = ascii_len_n((const char*)tdr->data.data+tdr->offset, tdr->data.length-tdr->offset);
break;
case CH_UTF16:
length = utf16_len_n(tdr->data.data+tdr->offset, tdr->data.length-tdr->offset);
break;
default:
return NT_STATUS_INVALID_PARAMETER;
}
}
if (length == 0) {
*v = talloc_strdup(ctx, "");
return NT_STATUS_OK;
}
TDR_PULL_NEED_BYTES(tdr, el_size*length);
if (!convert_string_talloc_convenience(ctx, tdr->iconv_convenience, chset, CH_UNIX, tdr->data.data+tdr->offset, el_size*length, discard_const_p(void *, v), &ret, false)) {
return NT_STATUS_INVALID_PARAMETER;
}
tdr->offset += length * el_size;
return NT_STATUS_OK;
}
NTSTATUS tdr_push_charset(struct tdr_push *tdr, const char **v, uint32_t length, uint32_t el_size, charset_t chset)
{
size_t ret, required;
if (length == -1) {
length = strlen(*v) + 1; /* Extra element for null character */
}
required = el_size * length;
TDR_PUSH_NEED_BYTES(tdr, required);
if (!convert_string_convenience(tdr->iconv_convenience, CH_UNIX, chset, *v, strlen(*v), tdr->data.data+tdr->data.length, required, &ret, false)) {
return NT_STATUS_INVALID_PARAMETER;
}
/* Make sure the remaining part of the string is filled with zeroes */
if (ret < required) {
memset(tdr->data.data+tdr->data.length+ret, 0, required-ret);
}
tdr->data.length += required;
return NT_STATUS_OK;
}
NTSTATUS tdr_print_charset(struct tdr_print *tdr, const char *name, const char **v, uint32_t length, uint32_t el_size, charset_t chset)
{
tdr->print(tdr, "%-25s: %s", name, *v);
return NT_STATUS_OK;
}
/**
parse a hyper
*/
NTSTATUS tdr_pull_hyper(struct tdr_pull *tdr, TALLOC_CTX *ctx, uint64_t *v)
{
TDR_PULL_NEED_BYTES(tdr, 8);
*v = TDR_IVAL(tdr, tdr->offset);
*v |= (uint64_t)(TDR_IVAL(tdr, tdr->offset+4)) << 32;
tdr->offset += 8;
return NT_STATUS_OK;
}
/**
push a hyper
*/
NTSTATUS tdr_push_hyper(struct tdr_push *tdr, uint64_t *v)
{
TDR_PUSH_NEED_BYTES(tdr, 8);
TDR_SIVAL(tdr, tdr->data.length, ((*v) & 0xFFFFFFFF));
TDR_SIVAL(tdr, tdr->data.length+4, ((*v)>>32));
tdr->data.length += 8;
return NT_STATUS_OK;
}
/**
push a NTTIME
*/
NTSTATUS tdr_push_NTTIME(struct tdr_push *tdr, NTTIME *t)
{
TDR_CHECK(tdr_push_hyper(tdr, t));
return NT_STATUS_OK;
}
/**
pull a NTTIME
*/
NTSTATUS tdr_pull_NTTIME(struct tdr_pull *tdr, TALLOC_CTX *ctx, NTTIME *t)
{
TDR_CHECK(tdr_pull_hyper(tdr, ctx, t));
return NT_STATUS_OK;
}
/**
push a time_t
*/
NTSTATUS tdr_push_time_t(struct tdr_push *tdr, time_t *t)
{
return tdr_push_uint32(tdr, (uint32_t *)t);
}
/**
pull a time_t
*/
NTSTATUS tdr_pull_time_t(struct tdr_pull *tdr, TALLOC_CTX *ctx, time_t *t)
{
uint32_t tt;
TDR_CHECK(tdr_pull_uint32(tdr, ctx, &tt));
*t = tt;
return NT_STATUS_OK;
}
NTSTATUS tdr_print_time_t(struct tdr_print *tdr, const char *name, time_t *t)
{
if (*t == (time_t)-1 || *t == 0) {
tdr->print(tdr, "%-25s: (time_t)%d", name, (int)*t);
} else {
tdr->print(tdr, "%-25s: %s", name, timestring(tdr, *t));
}
return NT_STATUS_OK;
}
NTSTATUS tdr_print_NTTIME(struct tdr_print *tdr, const char *name, NTTIME *t)
{
tdr->print(tdr, "%-25s: %s", name, nt_time_string(tdr, *t));
return NT_STATUS_OK;
}
NTSTATUS tdr_print_DATA_BLOB(struct tdr_print *tdr, const char *name, DATA_BLOB *r)
{
tdr->print(tdr, "%-25s: DATA_BLOB length=%u", name, r->length);
if (r->length) {
dump_data(10, r->data, r->length);
}
return NT_STATUS_OK;
}
#define TDR_ALIGN(l,n) (((l) & ((n)-1)) == 0?0:((n)-((l)&((n)-1))))
/*
push a DATA_BLOB onto the wire.
*/
NTSTATUS tdr_push_DATA_BLOB(struct tdr_push *tdr, DATA_BLOB *blob)
{
if (tdr->flags & TDR_ALIGN2) {
blob->length = TDR_ALIGN(tdr->data.length, 2);
} else if (tdr->flags & TDR_ALIGN4) {
blob->length = TDR_ALIGN(tdr->data.length, 4);
} else if (tdr->flags & TDR_ALIGN8) {
blob->length = TDR_ALIGN(tdr->data.length, 8);
}
TDR_PUSH_NEED_BYTES(tdr, blob->length);
memcpy(tdr->data.data+tdr->data.length, blob->data, blob->length);
return NT_STATUS_OK;
}
/*
pull a DATA_BLOB from the wire.
*/
NTSTATUS tdr_pull_DATA_BLOB(struct tdr_pull *tdr, TALLOC_CTX *ctx, DATA_BLOB *blob)
{
uint32_t length;
if (tdr->flags & TDR_ALIGN2) {
length = TDR_ALIGN(tdr->offset, 2);
} else if (tdr->flags & TDR_ALIGN4) {
length = TDR_ALIGN(tdr->offset, 4);
} else if (tdr->flags & TDR_ALIGN8) {
length = TDR_ALIGN(tdr->offset, 8);
} else if (tdr->flags & TDR_REMAINING) {
length = tdr->data.length - tdr->offset;
} else {
return NT_STATUS_INVALID_PARAMETER;
}
if (tdr->data.length - tdr->offset < length) {
length = tdr->data.length - tdr->offset;
}
TDR_PULL_NEED_BYTES(tdr, length);
*blob = data_blob_talloc(tdr, tdr->data.data+tdr->offset, length);
tdr->offset += length;
return NT_STATUS_OK;
}
struct tdr_push *tdr_push_init(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *ic)
{
struct tdr_push *push = talloc_zero(mem_ctx, struct tdr_push);
if (push == NULL)
return NULL;
push->iconv_convenience = talloc_reference(push, ic);
return push;
}
struct tdr_pull *tdr_pull_init(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *ic)
{
struct tdr_pull *pull = talloc_zero(mem_ctx, struct tdr_pull);
if (pull == NULL)
return NULL;
pull->iconv_convenience = talloc_reference(pull, ic);
return pull;
}
NTSTATUS tdr_push_to_fd(int fd, struct smb_iconv_convenience *iconv_convenience, tdr_push_fn_t push_fn, const void *p)
{
struct tdr_push *push = tdr_push_init(NULL, iconv_convenience);
if (push == NULL)
return NT_STATUS_NO_MEMORY;
if (NT_STATUS_IS_ERR(push_fn(push, p))) {
DEBUG(1, ("Error pushing data\n"));
talloc_free(push);
return NT_STATUS_UNSUCCESSFUL;
}
if (write(fd, push->data.data, push->data.length) < push->data.length) {
DEBUG(1, ("Error writing all data\n"));
return NT_STATUS_UNSUCCESSFUL;
}
talloc_free(push);
return NT_STATUS_OK;
}
void tdr_print_debug_helper(struct tdr_print *tdr, const char *format, ...) _PRINTF_ATTRIBUTE(2,3)
{
va_list ap;
char *s = NULL;
int i;
va_start(ap, format);
vasprintf(&s, format, ap);
va_end(ap);
for (i=0;i<tdr->level;i++) { DEBUG(0,(" ")); }
DEBUG(0,("%s\n", s));
free(s);
}