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samba-mirror/source3/smbd/srvstr.c
Andrew Tridgell 4ff011d88e Added STR_NOALIGN flags to clistr and srvstr fns. Yes, NT actually does
send unaligned unicode strings sometimes!
Fixed our handling of the workgroup name tacked on the end of the
NT1 negprot response (a unaligned unicode)
fixed a couple of places where we should be using the message_end fns instead
of pre-calculated buffer lengths
(This used to be commit 86613493a9)
2001-06-21 05:38:28 +00:00

169 lines
5.3 KiB
C

/*
Unix SMB/Netbios implementation.
Version 3.0
server specific string routines
Copyright (C) Andrew Tridgell 2001
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.
*/
#define NO_SYSLOG
#include "includes.h"
#define UNICODE_FLAG(buf, flags) (!(flags & STR_ASCII) && \
((flags & STR_UNICODE || \
(SVAL(buf, smb_flg2) & FLAGS2_UNICODE_STRINGS))))
/****************************************************************************
return an alignment of either 0 or 1
if unicode is not negotiated then return 0
otherwise return 1 if offset is off
****************************************************************************/
static int srvstr_align(void *inbuf, int offset, int flags)
{
if ((flags & STR_NOALIGN) || !UNICODE_FLAG(inbuf, flags)) return 0;
return offset & 1;
}
/****************************************************************************
copy a string from a char* src to a unicode or ascii
dos code page destination choosing unicode or ascii based on the
FLAGS2_UNICODE_STRINGS bit in inbuf
return the number of bytes occupied by the string in the destination
flags can have:
STR_TERMINATE means include the null termination
STR_CONVERT means convert from unix to dos codepage
STR_UPPER means uppercase in the destination
STR_ASCII use ascii even with unicode servers
STR_UNICODE means to force as unicode
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
****************************************************************************/
int srvstr_push(void *outbuf, void *dest, const char *src, int dest_len, int flags)
{
int len=0;
/* treat a pstring as "unlimited" length */
if (dest_len == -1) {
dest_len = sizeof(pstring);
}
if (srvstr_align(outbuf, PTR_DIFF(dest, outbuf), flags)) {
*(char *)dest = 0;
dest = (void *)((char *)dest + 1);
dest_len--;
len++;
}
if (!UNICODE_FLAG(outbuf, flags)) {
/* the client doesn't want unicode */
safe_strcpy(dest, src, dest_len);
len = strlen(dest);
if (flags & STR_TERMINATE) len++;
if (flags & STR_CONVERT) unix_to_dos(dest,True);
if (flags & STR_UPPER) strupper(dest);
return len;
}
/* the server likes unicode. give it the works */
if (flags & STR_CONVERT) {
dos_PutUniCode(dest, src, dest_len, flags & STR_TERMINATE);
} else {
ascii_to_unistr(dest, src, dest_len);
}
if (flags & STR_UPPER) {
strupper_w(dest);
}
len += strlen(src)*2;
if (flags & STR_TERMINATE) len += 2;
return len;
}
/****************************************************************************
copy a string from a unicode or ascii source (depending on flg2)
to a char* destination
flags can have:
STR_CONVERT means convert from dos to unix codepage
STR_TERMINATE means the string in src is null terminated
STR_UNICODE means to force as unicode
STR_NOALIGN means don't do alignment
if STR_TERMINATE is set then src_len is ignored
src_len is the length of the source area in bytes
return the number of bytes occupied by the string in src
****************************************************************************/
int srvstr_pull(void *inbuf, char *dest, const void *src, int dest_len, int src_len, int flags)
{
int len;
if (dest_len == -1) {
dest_len = sizeof(pstring);
}
if (srvstr_align(inbuf, PTR_DIFF(src, inbuf), flags)) {
src = (void *)((char *)src + 1);
if (src_len > 0) src_len--;
}
if (!UNICODE_FLAG(inbuf, flags)) {
/* the server doesn't want unicode */
if (flags & STR_TERMINATE) {
safe_strcpy(dest, src, dest_len);
len = strlen(src)+1;
} else {
if (src_len > dest_len) src_len = dest_len;
len = src_len;
memcpy(dest, src, len);
dest[len] = 0;
}
if (flags & STR_CONVERT) dos_to_unix(dest,True);
return len;
}
if (flags & STR_TERMINATE) {
unistr_to_ascii(dest, src, dest_len);
len = strlen(dest)*2 + 2;
} else {
int i, c;
if (dest_len*2 < src_len) src_len = 2*dest_len;
for (i=0; i < src_len; i += 2) {
c = SVAL(src, i);
*dest++ = c;
}
*dest++ = 0;
len = src_len;
}
if (flags & STR_CONVERT) dos_to_unix(dest,True);
return len;
}
/****************************************************************************
these are useful for replacing all those StrnCpy() ops for copying data
to/from the wire
****************************************************************************/
int srvstr_push_ascii(void *dest, const char *src, int dest_len)
{
return srvstr_push(NULL, dest, src, dest_len,
STR_ASCII|STR_CONVERT|STR_TERMINATE);
}
int srvstr_pull_ascii(char *dest, const void *src, int dest_len)
{
return srvstr_pull(NULL, dest, src, dest_len, -1,
STR_ASCII|STR_CONVERT|STR_TERMINATE);
}