source: trunk/samba/source/libsmb/clidgram.c @ 26

Last change on this file since 26 was 26, checked in by Paul Smedley, 14 years ago

Updated source to 3.0.25rc1

File size: 5.1 KB
Line 
1/*
2   Unix SMB/CIFS implementation.
3   client dgram calls
4   Copyright (C) Andrew Tridgell 1994-1998
5   Copyright (C) Richard Sharpe 2001
6   Copyright (C) John Terpstra 2001
7
8   This program is free software; you can redistribute it and/or modify
9   it under the terms of the GNU General Public License as published by
10   the Free Software Foundation; either version 2 of the License, or
11   (at your option) any later version.
12   
13   This program is distributed in the hope that it will be useful,
14   but WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   GNU General Public License for more details.
17   
18   You should have received a copy of the GNU General Public License
19   along with this program; if not, write to the Free Software
20   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21*/
22
23#include "includes.h"
24
25/*
26 * cli_send_mailslot, send a mailslot for client code ...
27 */
28
29BOOL cli_send_mailslot(BOOL unique, const char *mailslot,
30                       uint16 priority,
31                       char *buf, int len,
32                       const char *srcname, int src_type, 
33                       const char *dstname, int dest_type,
34                       struct in_addr dest_ip)
35{
36        struct packet_struct p;
37        struct dgram_packet *dgram = &p.packet.dgram;
38        char *ptr, *p2;
39        char tmp[4];
40        pid_t nmbd_pid;
41
42        if ((nmbd_pid = pidfile_pid("nmbd")) == 0) {
43                DEBUG(3, ("No nmbd found\n"));
44                return False;
45        }
46
47        if (!message_init())
48                return False;
49
50        memset((char *)&p, '\0', sizeof(p));
51
52        /*
53         * Next, build the DGRAM ...
54         */
55
56        /* DIRECT GROUP or UNIQUE datagram. */
57        dgram->header.msg_type = unique ? 0x10 : 0x11; 
58        dgram->header.flags.node_type = M_NODE;
59        dgram->header.flags.first = True;
60        dgram->header.flags.more = False;
61        dgram->header.dgm_id = ((unsigned)time(NULL)%(unsigned)0x7FFF) +
62                ((unsigned)sys_getpid()%(unsigned)100);
63        /* source ip is filled by nmbd */
64        dgram->header.dgm_length = 0; /* Let build_dgram() handle this. */
65        dgram->header.packet_offset = 0;
66 
67        make_nmb_name(&dgram->source_name,srcname,src_type);
68        make_nmb_name(&dgram->dest_name,dstname,dest_type);
69
70        ptr = &dgram->data[0];
71
72        /* Setup the smb part. */
73        ptr -= 4; /* XXX Ugliness because of handling of tcp SMB length. */
74        memcpy(tmp,ptr,4);
75        set_message(ptr,17,strlen(mailslot) + 1 + len,True);
76        memcpy(ptr,tmp,4);
77
78        SCVAL(ptr,smb_com,SMBtrans);
79        SSVAL(ptr,smb_vwv1,len);
80        SSVAL(ptr,smb_vwv11,len);
81        SSVAL(ptr,smb_vwv12,70 + strlen(mailslot));
82        SSVAL(ptr,smb_vwv13,3);
83        SSVAL(ptr,smb_vwv14,1);
84        SSVAL(ptr,smb_vwv15,priority);
85        SSVAL(ptr,smb_vwv16,2);
86        p2 = smb_buf(ptr);
87        fstrcpy(p2,mailslot);
88        p2 = skip_string(ptr,MAX_DGRAM_SIZE,p2);
89        if (!p2) {
90                return False;
91        }
92
93        memcpy(p2,buf,len);
94        p2 += len;
95
96        dgram->datasize = PTR_DIFF(p2,ptr+4); /* +4 for tcp length. */
97
98        p.packet_type = DGRAM_PACKET;
99        p.ip = dest_ip;
100        p.timestamp = time(NULL);
101
102        DEBUG(4,("send_mailslot: Sending to mailslot %s from %s ",
103                 mailslot, nmb_namestr(&dgram->source_name)));
104        DEBUGADD(4,("to %s IP %s\n", nmb_namestr(&dgram->dest_name),
105                    inet_ntoa(dest_ip)));
106
107        return NT_STATUS_IS_OK(message_send_pid(pid_to_procid(nmbd_pid),
108                                                MSG_SEND_PACKET, &p, sizeof(p),
109                                                False));
110}
111
112/*
113 * cli_get_response: Get a response ...
114 */
115BOOL cli_get_response(const char *mailslot, char *buf, int bufsiz)
116{
117        struct packet_struct *p;
118
119        p = receive_unexpected(DGRAM_PACKET, 0, mailslot);
120
121        if (p == NULL)
122                return False;
123
124        memcpy(buf, &p->packet.dgram.data[92],
125               MIN(bufsiz, p->packet.dgram.datasize-92));
126
127        return True;
128}
129
130/*
131 * cli_get_backup_list: Send a get backup list request ...
132 */
133
134static char cli_backup_list[1024];
135
136int cli_get_backup_list(const char *myname, const char *send_to_name)
137{
138        pstring outbuf;
139        char *p;
140        struct in_addr sendto_ip;
141
142        if (!resolve_name(send_to_name, &sendto_ip, 0x1d)) {
143
144                DEBUG(0, ("Could not resolve name: %s<1D>\n", send_to_name));
145                return False;
146
147        }
148
149        memset(cli_backup_list, '\0', sizeof(cli_backup_list));
150        memset(outbuf, '\0', sizeof(outbuf));
151
152        p = outbuf;
153
154        SCVAL(p, 0, ANN_GetBackupListReq);
155        p++;
156
157        SCVAL(p, 0, 1); /* Count pointer ... */
158        p++;
159
160        SIVAL(p, 0, 1); /* The sender's token ... */
161        p += 4;
162
163        cli_send_mailslot(True, "\\MAILSLOT\\BROWSE", 1, outbuf, 
164                          PTR_DIFF(p, outbuf), myname, 0, send_to_name, 
165                          0x1d, sendto_ip);
166
167        /* We should check the error and return if we got one */
168
169        /* Now, get the response ... */
170
171        cli_get_response("\\MAILSLOT\\BROWSE",
172                         cli_backup_list, sizeof(cli_backup_list));
173
174        return True;
175
176}
177
178/*
179 * cli_get_backup_server: Get the backup list and retrieve a server from it
180 */
181
182int cli_get_backup_server(char *my_name, char *target, char *servername, int namesize)
183{
184
185  /* Get the backup list first. We could pull this from the cache later */
186
187  cli_get_backup_list(my_name, target);  /* FIXME: Check the response */
188
189  if (!cli_backup_list[0]) { /* Empty list ... try again */
190
191    cli_get_backup_list(my_name, target);
192
193  }
194
195  strncpy(servername, cli_backup_list, MIN(16, namesize));
196
197  return True;
198
199}
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