summaryrefslogtreecommitdiff
path: root/source3/libsmb/clientgen.c
blob: 25dc070024a1ed6bdaedda59cb47de1abaa735ce (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
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   SMB client generic functions
   Copyright (C) Andrew Tridgell 1994-1998
   
   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"

/*
 * Change the port number used to call on 
 */
int cli_set_port(struct cli_state *cli, int port)
{
	cli->port = port;
	return port;
}

/****************************************************************************
recv an smb
****************************************************************************/
BOOL cli_receive_smb(struct cli_state *cli)
{
	BOOL ret;
 again:
	ret = client_receive_smb(cli->fd,cli->inbuf,cli->timeout);
	
	if (ret) {
		/* it might be an oplock break request */
		if (!(CVAL(cli->inbuf, smb_flg) & FLAG_REPLY) &&
		    CVAL(cli->inbuf,smb_com) == SMBlockingX &&
		    SVAL(cli->inbuf,smb_vwv6) == 0 &&
		    SVAL(cli->inbuf,smb_vwv7) == 0) {
			if (cli->oplock_handler) {
				int fnum = SVAL(cli->inbuf,smb_vwv2);
				unsigned char level = CVAL(cli->inbuf,smb_vwv3+1);
				if (!cli->oplock_handler(cli, fnum, level)) return False;
			}
			/* try to prevent loops */
			CVAL(cli->inbuf,smb_com) = 0xFF;
			goto again;
		}
	}

	return ret;
}

/****************************************************************************
  send an smb to a fd and re-establish if necessary
****************************************************************************/
BOOL cli_send_smb(struct cli_state *cli)
{
	size_t len;
	size_t nwritten=0;
	ssize_t ret;
	BOOL reestablished=False;

	len = smb_len(cli->outbuf) + 4;

	while (nwritten < len) {
		ret = write_socket(cli->fd,cli->outbuf+nwritten,len - nwritten);
		if (ret <= 0 && errno == EPIPE && !reestablished) {
			if (cli_reestablish_connection(cli)) {
				reestablished = True;
				nwritten=0;
				continue;
			}
		}
		if (ret <= 0) {
			DEBUG(0,("Error writing %d bytes to client. %d\n",
				 (int)len,(int)ret));
			return False;
		}
		nwritten += ret;
	}
	
	return True;
}

/****************************************************************************
setup basics in a outgoing packet
****************************************************************************/
void cli_setup_packet(struct cli_state *cli)
{
        cli->rap_error = 0;
	SSVAL(cli->outbuf,smb_pid,cli->pid);
	SSVAL(cli->outbuf,smb_uid,cli->vuid);
	SSVAL(cli->outbuf,smb_mid,cli->mid);
	if (cli->protocol > PROTOCOL_CORE) {
		uint16 flags2;
		SCVAL(cli->outbuf,smb_flg,0x8);
		flags2 = FLAGS2_LONG_PATH_COMPONENTS;
		if (cli->capabilities & CAP_UNICODE) {
			flags2 |= FLAGS2_UNICODE_STRINGS;
		}
		if (cli->capabilities & CAP_STATUS32) {
			flags2 |= FLAGS2_32_BIT_ERROR_CODES;
		}
		flags2 |= FLAGS2_EXTENDED_SECURITY;
		SSVAL(cli->outbuf,smb_flg2, flags2);
	}
}

/****************************************************************************
setup the bcc length of the packet from a pointer to the end of the data
****************************************************************************/
void cli_setup_bcc(struct cli_state *cli, void *p)
{
	set_message_bcc(cli->outbuf, PTR_DIFF(p, smb_buf(cli->outbuf)));
}



/****************************************************************************
initialise a client structure
****************************************************************************/
void cli_init_creds(struct cli_state *cli, const struct ntuser_creds *usr)
{
        /* copy_nt_creds(&cli->usr, usr); */
	safe_strcpy(cli->domain   , usr->domain   , sizeof(usr->domain   )-1);
	safe_strcpy(cli->user_name, usr->user_name, sizeof(usr->user_name)-1);
	memcpy(&cli->pwd, &usr->pwd, sizeof(usr->pwd));
        cli->ntlmssp_flags = usr->ntlmssp_flags;
        cli->ntlmssp_cli_flgs = usr != NULL ? usr->ntlmssp_flags : 0;

        DEBUG(10,("cli_init_creds: user %s domain %s flgs: %x\nntlmssp_cli_flgs:%x\n",
               cli->user_name, cli->domain,
               cli->ntlmssp_flags,cli->ntlmssp_cli_flgs));
}


/****************************************************************************
initialise a client structure
****************************************************************************/
struct cli_state *cli_initialise(struct cli_state *cli)
{
        BOOL alloced_cli = False;

	if (!cli) {
		cli = (struct cli_state *)malloc(sizeof(*cli));
		if (!cli)
			return NULL;
		ZERO_STRUCTP(cli);
                alloced_cli = True;
	}

	if (cli->initialised) {
		cli_shutdown(cli);
	}

	ZERO_STRUCTP(cli);

	cli->port = 0;
	cli->fd = -1;
	cli->cnum = -1;
	cli->pid = (uint16)sys_getpid();
	cli->mid = 1;
	cli->vuid = UID_FIELD_INVALID;
	cli->protocol = PROTOCOL_NT1;
	cli->timeout = 20000; /* Timeout is in milliseconds. */
	cli->bufsize = CLI_BUFFER_SIZE+4;
	cli->max_xmit = cli->bufsize;
	cli->outbuf = (char *)malloc(cli->bufsize);
	cli->inbuf = (char *)malloc(cli->bufsize);
	cli->oplock_handler = cli_oplock_ack;

	if (!cli->outbuf || !cli->inbuf)
                goto error;

	if ((cli->mem_ctx = talloc_init()) == NULL)
                goto error;

	memset(cli->outbuf, 0, cli->bufsize);
	memset(cli->inbuf, 0, cli->bufsize);

	cli->nt_pipe_fnum = 0;

	cli->initialised = 1;

	return cli;

        /* Clean up after malloc() error */

 error:

        SAFE_FREE(cli->inbuf);
        SAFE_FREE(cli->outbuf);

        if (alloced_cli)
                SAFE_FREE(cli);

        return NULL;
}

/****************************************************************************
shutdown a client structure
****************************************************************************/
void cli_shutdown(struct cli_state *cli)
{
	SAFE_FREE(cli->outbuf);
	SAFE_FREE(cli->inbuf);

	data_blob_free(cli->secblob);

	if (cli->mem_ctx)
		talloc_destroy(cli->mem_ctx);

#ifdef WITH_SSL
	if (cli->fd != -1)
		sslutil_disconnect(cli->fd);
#endif /* WITH_SSL */
	if (cli->fd != -1) 
		close(cli->fd);
	memset(cli, 0, sizeof(*cli));
}


/****************************************************************************
set socket options on a open connection
****************************************************************************/
void cli_sockopt(struct cli_state *cli, char *options)
{
	set_socket_options(cli->fd, options);
}

/****************************************************************************
set the PID to use for smb messages. Return the old pid.
****************************************************************************/
uint16 cli_setpid(struct cli_state *cli, uint16 pid)
{
	uint16 ret = cli->pid;
	cli->pid = pid;
	return ret;
}