summaryrefslogtreecommitdiff
path: root/source3/smbd/srvstr.c
blob: 241a74f02f04d24aead46125c7d8e8ad7c84df7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/* 
   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) (SVAL(buf, smb_flg2) & FLAGS2_UNICODE_STRINGS)

/****************************************************************************
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
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 (!(flags & STR_ASCII) && srvstr_align(outbuf, PTR_DIFF(dest, outbuf))) {
		*(char *)dest = 0;
		dest++;
		dest_len--;
		len++;
	}

	if ((flags & STR_ASCII) || !UNICODE_FLAG(outbuf)) {
		/* 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
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 (!(flags & STR_ASCII) && srvstr_align(inbuf, PTR_DIFF(src, inbuf))) {
		src++;
		if (src_len > 0) src_len--;
	}

	if ((flags & STR_ASCII) || (!(flags & STR_UNICODE) && !UNICODE_FLAG(inbuf))) {
		/* 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;
}

/****************************************************************************
return an alignment of either 0 or 1
if unicode is not negotiated then return 0
otherwise return 1 if offset is off
****************************************************************************/
int srvstr_align(void *inbuf, int offset)
{
	if (!UNICODE_FLAG(inbuf)) return 0;
	return offset & 1;
}