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;
44 cli_init_signing(transport);
46 transport->socket->reference_count++;
48 ZERO_STRUCT(transport->called);
54 decrease reference count on a transport, and destroy if it becomes
57 void cli_transport_close(struct cli_transport *transport)
59 transport->reference_count--;
60 if (transport->reference_count <= 0) {
61 cli_sock_close(transport->socket);
62 talloc_destroy(transport->mem_ctx);
67 mark the transport as dead
69 void cli_transport_dead(struct cli_transport *transport)
71 cli_sock_dead(transport->socket);
76 /****************************************************************************
77 send a session request (if appropriate)
78 ****************************************************************************/
79 BOOL cli_transport_connect(struct cli_transport *transport,
80 struct nmb_name *calling,
81 struct nmb_name *called)
84 int len = NBT_HDR_SIZE;
85 struct cli_request *req;
88 transport->called = *called;
91 /* 445 doesn't have session request */
92 if (transport->socket->port == 445) {
96 /* allocate output buffer */
97 req = cli_request_setup_nonsmb(transport, NBT_HDR_SIZE + 2*nbt_mangled_name_len());
99 /* put in the destination name */
100 p = req->out.buffer + NBT_HDR_SIZE;
101 name_mangle(called->name, p, called->name_type);
105 p = req->out.buffer+len;
106 name_mangle(calling->name, p, calling->name_type);
109 _smb_setlen(req->out.buffer,len-4);
110 SCVAL(req->out.buffer,0,0x81);
112 if (!cli_request_send(req) ||
113 !cli_request_receive(req)) {
114 cli_request_destroy(req);
118 if (CVAL(req->in.buffer,0) != 0x82) {
119 transport->error.etype = ETYPE_NBT;
120 transport->error.e.nbt_error = CVAL(req->in.buffer,4);
121 cli_request_destroy(req);
125 cli_request_destroy(req);
130 /****************************************************************************
131 get next mid in sequence
132 ****************************************************************************/
133 uint16_t cli_transport_next_mid(struct cli_transport *transport)
136 struct cli_request *req;
138 mid = transport->next_mid;
141 /* now check to see if this mid is being used by one of the
142 pending requests. This is quite efficient because the list is
143 usually very short */
145 /* the zero mid is reserved for requests that don't have a mid */
146 if (mid == 0) mid = 1;
148 for (req=transport->pending_requests; req; req=req->next) {
149 if (req->mid == mid) {
155 transport->next_mid = mid+1;
160 setup the idle handler for a transport
162 void cli_transport_idle_handler(struct cli_transport *transport,
163 void (*idle_func)(struct cli_transport *, void *),
167 transport->idle.func = idle_func;
168 transport->idle.private = private;
169 transport->idle.period = period;
174 determine if a packet is pending for receive on a transport
176 BOOL cli_transport_pending(struct cli_transport *transport)
178 return socket_pending(transport->socket->fd);
184 wait for data on a transport, periodically calling a wait function
185 if one has been defined
186 return True if a packet is received
188 BOOL cli_transport_select(struct cli_transport *transport)
193 struct timeval timeout;
195 fd = transport->socket->fd;
202 uint_t period = 1000;
207 if (transport->idle.func) {
208 period = transport->idle.period;
211 timeout.tv_sec = period / 1000;
212 timeout.tv_usec = 1000*(period%1000);
214 selrtn = sys_select_intr(fd+1,&fds,NULL,NULL,&timeout);
217 /* the fd is readable */
222 /* sys_select_intr() already handles EINTR, so this
223 is an error. The socket is probably dead */
227 /* only other possibility is that we timed out - call the idle function
229 if (transport->idle.func) {
230 transport->idle.func(transport, transport->idle.private);
232 } while (selrtn == 0);