summaryrefslogtreecommitdiff
path: root/source3/libsmb/clistr.c
blob: 4c7c8e30772d48bb3a22868c902c284e80b88712 (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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   client 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"

/* we will delete this variable once our client side unicode support is complete */
extern int cli_use_unicode;

/****************************************************************************
copy a string from a char* src to a unicode or ascii
dos code page destination choosing unicode or ascii based on the 
cli->capabilities flag
return the number of bytes occupied by the string in the destination
flags can have:
  CLISTR_TERMINATE means include the null termination
  CLISTR_CONVERT   means convert from unix to dos codepage
  CLISTR_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
****************************************************************************/
int clistr_push(struct cli_state *cli, void *dest, 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 (clistr_align(cli, PTR_DIFF(dest, cli->outbuf))) {
		*(char *)dest = 0;
		dest++;
		dest_len--;
		len++;
	}

	if (!cli_use_unicode || !(cli->capabilities & CAP_UNICODE)) {
		/* the server doesn't want unicode */
		safe_strcpy(dest, src, dest_len);
		len = strlen(dest);
		if (flags & CLISTR_TERMINATE) len++;
		if (flags & CLISTR_CONVERT) unix_to_dos(dest,True);
		if (flags & CLISTR_UPPER) strupper(dest);
		return len;
	}

	/* the server likes unicode. give it the works */
	if (flags & CLISTR_CONVERT) {
		dos_PutUniCode(dest, src, dest_len, flags & CLISTR_TERMINATE);
	} else {
		ascii_to_unistr(dest, src, dest_len);
	}
	if (flags & CLISTR_UPPER) {
		strupper_w(dest);
	}
	len += strlen(src)*2;
	if (flags & CLISTR_TERMINATE) len += 2;
	return len;
}


/****************************************************************************
return the length that a string would occupy when copied with clistr_push()
  CLISTR_TERMINATE means include the null termination
  CLISTR_CONVERT   means convert from unix to dos codepage
  CLISTR_UPPER     means uppercase in the destination
note that dest is only used for alignment purposes. No data is written.
****************************************************************************/
int clistr_push_size(struct cli_state *cli, void *dest, char *src, int dest_len, int flags)
{
	int len = strlen(src);
	if (flags & CLISTR_TERMINATE) len++;
	if (cli_use_unicode && (cli->capabilities & CAP_UNICODE)) len *= 2;

	if (dest && clistr_align(cli, PTR_DIFF(cli->outbuf, dest))) {
		len++;
	}

	return len;
}

/****************************************************************************
copy a string from a unicode or ascii source (depending on
cli->capabilities) to a char* destination
flags can have:
  CLISTR_CONVERT   means convert from dos to unix codepage
  CLISTR_TERMINATE means the string in src is null terminated
if CLISTR_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 clistr_pull(struct cli_state *cli, char *dest, void *src, int dest_len, int src_len, int flags)
{
	int len;

	if (dest_len == -1) {
		dest_len = sizeof(pstring);
	}

	if (clistr_align(cli, PTR_DIFF(cli->inbuf, src))) {
		src++;
		if (src_len > 0) src_len--;
	}

	if (!cli_use_unicode || !(cli->capabilities & CAP_UNICODE)) {
		/* the server doesn't want unicode */
		if (flags & CLISTR_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 & CLISTR_CONVERT) dos_to_unix(dest,True);
		return len;
	}

	if (flags & CLISTR_TERMINATE) {
		unistr_to_ascii(dest, src, dest_len);
		len = strlen(dest)*2 + 2;
	} else {
		int i, c;
		if (dest_len < src_len) src_len = dest_len;
		for (i=0; i < src_len; i += 2) {
			c = SVAL(src, i);
			*dest++ = c;
		}
		*dest++ = 0;
		len = src_len;
	}
	if (flags & CLISTR_CONVERT) dos_to_unix(dest,True);
	return len;
}

/****************************************************************************
return the length that a string would occupy (not including the null)
when copied with clistr_pull()
if src_len is -1 then assume the source is null terminated
****************************************************************************/
int clistr_pull_size(struct cli_state *cli, void *src, int src_len)
{
	if (clistr_align(cli, PTR_DIFF(cli->inbuf, src))) {
		src++;
		if (src_len > 0) src_len--;
	}

	if (!cli_use_unicode || !(cli->capabilities & CAP_UNICODE)) {
		return strlen(src);
	}	
	return strlen_w(src);
}

/****************************************************************************
return an alignment of either 0 or 1
if unicode is not negotiated then return 0
otherwise return 1 if offset is off
****************************************************************************/
int clistr_align(struct cli_state *cli, int offset)
{
	if (!cli_use_unicode || !(cli->capabilities & CAP_UNICODE)) return 0;
	return offset & 1;
}