2 Unix SMB/CIFS implementation.
3 SMB client transport context management functions
4 Copyright (C) Andrew Tridgell 1994-2003
5 Copyright (C) James Myers 2003 <myersjj@samba.org>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 create a transport structure based on an established socket
27 struct cli_transport *cli_transport_init(struct cli_socket *sock)
30 struct cli_transport *transport;
32 mem_ctx = talloc_init("cli_transport");
33 if (!mem_ctx) return NULL;
35 transport = talloc_zero(mem_ctx, sizeof(*transport));
36 if (!transport) return NULL;
38 transport->mem_ctx = mem_ctx;
39 transport->socket = sock;
40 transport->negotiate.protocol = PROTOCOL_NT1;
41 transport->options.use_spnego = lp_use_spnego();
42 transport->negotiate.max_xmit = ~0;
43 cli_null_set_signing(transport);
44 transport->socket->reference_count++;
46 ZERO_STRUCT(transport->called);
52 decrease reference count on a transport, and destroy if it becomes
55 void cli_transport_close(struct cli_transport *transport)
57 transport->reference_count--;
58 if (transport->reference_count <= 0) {
59 cli_sock_close(transport->socket);
60 talloc_destroy(transport->mem_ctx);
65 mark the transport as dead
67 void cli_transport_dead(struct cli_transport *transport)
69 cli_sock_dead(transport->socket);
74 /****************************************************************************
75 send a session request (if appropriate)
76 ****************************************************************************/
77 BOOL cli_transport_connect(struct cli_transport *transport,
78 struct nmb_name *calling,
79 struct nmb_name *called)
82 int len = NBT_HDR_SIZE;
83 struct cli_request *req;
86 transport->called = *called;
89 /* 445 doesn't have session request */
90 if (transport->socket->port == 445) {
94 /* allocate output buffer */
95 req = cli_request_setup_nonsmb(transport, NBT_HDR_SIZE + 2*nbt_mangled_name_len());
97 /* put in the destination name */
98 p = req->out.buffer + NBT_HDR_SIZE;
99 name_mangle(called->name, p, called->name_type);
103 p = req->out.buffer+len;
104 name_mangle(calling->name, p, calling->name_type);
107 _smb_setlen(req->out.buffer,len-4);
108 SCVAL(req->out.buffer,0,0x81);
110 if (!cli_request_send(req) ||
111 !cli_request_receive(req)) {
112 cli_request_destroy(req);
116 if (CVAL(req->in.buffer,0) != 0x82) {
117 transport->error.etype = ETYPE_NBT;
118 transport->error.e.nbt_error = CVAL(req->in.buffer,4);
119 cli_request_destroy(req);
123 cli_request_destroy(req);
128 /****************************************************************************
129 get next mid in sequence
130 ****************************************************************************/
131 uint16_t cli_transport_next_mid(struct cli_transport *transport)
134 struct cli_request *req;
136 mid = transport->next_mid;
139 /* now check to see if this mid is being used by one of the
140 pending requests. This is quite efficient because the list is
141 usually very short */
143 /* the zero mid is reserved for requests that don't have a mid */
144 if (mid == 0) mid = 1;
146 for (req=transport->pending_requests; req; req=req->next) {
147 if (req->mid == mid) {
153 transport->next_mid = mid+1;
158 setup the idle handler for a transport
160 void cli_transport_idle_handler(struct cli_transport *transport,
161 void (*idle_func)(struct cli_transport *, void *),
165 transport->idle.func = idle_func;
166 transport->idle.private = private;
167 transport->idle.period = period;
172 determine if a packet is pending for receive on a transport
174 BOOL cli_transport_pending(struct cli_transport *transport)
176 return socket_pending(transport->socket->fd);
182 wait for data on a transport, periodically calling a wait function
183 if one has been defined
184 return True if a packet is received
186 BOOL cli_transport_select(struct cli_transport *transport)
191 struct timeval timeout;
193 fd = transport->socket->fd;
200 uint_t period = 1000;
205 if (transport->idle.func) {
206 period = transport->idle.period;
209 timeout.tv_sec = period / 1000;
210 timeout.tv_usec = 1000*(period%1000);
212 selrtn = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout);
215 /* the fd is readable */
220 /* sys_select_intr() already handles EINTR, so this
221 is an error. The socket is probably dead */
225 /* only other possibility is that we timed out - call the idle function
227 if (transport->idle.func) {
228 transport->idle.func(transport, transport->idle.private);
230 } while (selrtn == 0);