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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/*
Unix SMB/CIFS implementation.
client dgram calls
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Richard Sharpe 2001
Copyright (C) John Terpstra 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.
*/
#include "includes.h"
/*
* cli_send_mailslot, send a mailslot for client code ...
*/
int cli_send_mailslot(int dgram_sock, BOOL unique, const char *mailslot,
char *buf, int len,
const char *srcname, int src_type,
const char *dstname, int dest_type,
struct in_addr dest_ip, struct in_addr src_ip,
int dest_port, int src_port)
{
struct packet_struct p;
struct dgram_packet *dgram = &p.packet.dgram;
char *ptr, *p2;
char tmp[4];
memset((char *)&p, '\0', sizeof(p));
/*
* Next, build the DGRAM ...
*/
/* DIRECT GROUP or UNIQUE datagram. */
dgram->header.msg_type = unique ? 0x10 : 0x11;
dgram->header.flags.node_type = M_NODE;
dgram->header.flags.first = True;
dgram->header.flags.more = False;
dgram->header.dgm_id = ((unsigned)time(NULL)%(unsigned)0x7FFF) + ((unsigned)sys_getpid()%(unsigned)100);
dgram->header.source_ip.s_addr = src_ip.s_addr;
dgram->header.source_port = ntohs(src_port);
dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
dgram->header.packet_offset = 0;
make_nmb_name(&dgram->source_name,srcname,src_type);
make_nmb_name(&dgram->dest_name,dstname,dest_type);
ptr = &dgram->data[0];
/* Setup the smb part. */
ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
memcpy(tmp,ptr,4);
set_message(ptr,17,17 + len,True);
memcpy(ptr,tmp,4);
SCVAL(ptr,smb_com,SMBtrans);
SSVAL(ptr,smb_vwv1,len);
SSVAL(ptr,smb_vwv11,len);
SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
SSVAL(ptr,smb_vwv13,3);
SSVAL(ptr,smb_vwv14,1);
SSVAL(ptr,smb_vwv15,1);
SSVAL(ptr,smb_vwv16,2);
p2 = smb_buf(ptr);
fstrcpy(p2,mailslot);
p2 = skip_string(p2,1);
memcpy(p2,buf,len);
p2 += len;
dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
p.ip = dest_ip;
p.port = dest_port;
p.fd = dgram_sock;
p.timestamp = time(NULL);
p.packet_type = DGRAM_PACKET;
DEBUG(4,("send_mailslot: Sending to mailslot %s from %s IP %s ", mailslot,
nmb_namestr(&dgram->source_name), inet_ntoa(src_ip)));
DEBUG(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name), inet_ntoa(dest_ip)));
return send_packet(&p);
}
/*
* cli_get_response: Get a response ...
*/
int cli_get_response(int dgram_sock, BOOL unique, const char *mailslot, char *buf, int bufsiz)
{
struct packet_struct *packet;
packet = receive_dgram_packet(dgram_sock, 5, mailslot);
if (packet) { /* We got one, pull what we want out of the SMB data ... */
struct dgram_packet *dgram = &packet->packet.dgram;
/*
* We should probably parse the SMB, but for now, we will pull what
* from fixed, known locations ...
*/
/* Copy the data to buffer, respecting sizes ... */
memcpy(buf, &dgram->data[92], MIN(bufsiz, (dgram->datasize - 92)));
}
else
return -1;
return 0;
}
/*
* cli_get_backup_list: Send a get backup list request ...
*/
static char cli_backup_list[1024];
int cli_get_backup_list(const char *myname, const char *send_to_name)
{
pstring outbuf;
char *p;
struct in_addr sendto_ip, my_ip;
int dgram_sock;
struct sockaddr_in sock_out;
socklen_t name_size;
if (!resolve_name(send_to_name, &sendto_ip, 0x1d)) {
DEBUG(0, ("Could not resolve name: %s<1D>\n", send_to_name));
return False;
}
my_ip.s_addr = inet_addr("0.0.0.0");
if (!resolve_name(myname, &my_ip, 0x00)) { /* FIXME: Call others here */
DEBUG(0, ("Could not resolve name: %s<00>\n", myname));
}
if ((dgram_sock = open_socket_out(SOCK_DGRAM, &sendto_ip, 138, LONG_CONNECT_TIMEOUT)) < 0) {
DEBUG(4, ("open_sock_out failed ..."));
return False;
}
/* Make it a broadcast socket ... */
set_socket_options(dgram_sock, "SO_BROADCAST");
/* Make it non-blocking??? */
if (fcntl(dgram_sock, F_SETFL, O_NONBLOCK) < 0) {
DEBUG(0, ("Unable to set non blocking on dgram sock\n"));
}
/* Now, bind a local addr to it ... Try port 138 first ... */
memset((char *)&sock_out, '\0', sizeof(sock_out));
sock_out.sin_addr.s_addr = INADDR_ANY;
sock_out.sin_port = htons(138);
sock_out.sin_family = AF_INET;
if (bind(dgram_sock, (struct sockaddr *)&sock_out, sizeof(sock_out)) < 0) {
/* Try again on any port ... */
sock_out.sin_port = INADDR_ANY;
if (bind(dgram_sock, (struct sockaddr *)&sock_out, sizeof(sock_out)) < 0) {
DEBUG(4, ("failed to bind socket to address ...\n"));
return False;
}
}
/* Now, figure out what socket name we were bound to. We want the port */
name_size = sizeof(sock_out);
getsockname(dgram_sock, (struct sockaddr *)&sock_out, &name_size);
DEBUG(5, ("Socket bound to IP:%s, port: %d\n", inet_ntoa(sock_out.sin_addr), ntohs(sock_out.sin_port)));
/* Now, build the request */
memset(cli_backup_list, '\0', sizeof(cli_backup_list));
memset(outbuf, '\0', sizeof(outbuf));
p = outbuf;
SCVAL(p, 0, ANN_GetBackupListReq);
p++;
SCVAL(p, 0, 1); /* Count pointer ... */
p++;
SIVAL(p, 0, 1); /* The sender's token ... */
p += 4;
cli_send_mailslot(dgram_sock, True, "\\MAILSLOT\\BROWSE", outbuf,
PTR_DIFF(p, outbuf), myname, 0, send_to_name,
0x1d, sendto_ip, my_ip, 138, sock_out.sin_port);
/* We should check the error and return if we got one */
/* Now, get the response ... */
cli_get_response(dgram_sock, True, "\\MAILSLOT\\BROWSE", cli_backup_list, sizeof(cli_backup_list));
/* Should check the response here ... FIXME */
close(dgram_sock);
return True;
}
/*
* cli_get_backup_server: Get the backup list and retrieve a server from it
*/
int cli_get_backup_server(char *my_name, char *target, char *servername, int namesize)
{
/* Get the backup list first. We could pull this from the cache later */
cli_get_backup_list(my_name, target); /* FIXME: Check the response */
if (!cli_backup_list[0]) { /* Empty list ... try again */
cli_get_backup_list(my_name, target);
}
strncpy(servername, cli_backup_list, MIN(16, namesize));
return True;
}
|
