summaryrefslogtreecommitdiff
path: root/source4/libcli/raw/clisocket.c
blob: eaa02e10472782f5dfb59938bcbcac75ea504a3d (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
251
252
253
254
/* 
   Unix SMB/CIFS implementation.

   SMB client socket context management functions

   Copyright (C) Andrew Tridgell 1994-2005
   Copyright (C) James Myers 2003 <myersjj@samba.org>
   
   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "lib/events/events.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "lib/socket/socket.h"
#include "libcli/resolve/resolve.h"
#include "param/param.h"

struct sock_connect_state {
	struct composite_context *ctx;
	const char *host_name;
	int num_ports;
	uint16_t *ports;
	const char *socket_options;
	struct smbcli_socket *result;
};

/*
  connect a smbcli_socket context to an IP/port pair
  if port is 0 then choose 445 then 139
*/

static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);

struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
						   const char *host_addr,
						   const char **ports,
						   const char *host_name,
						   struct resolve_context *resolve_ctx,
						   struct event_context *event_ctx)
{
	struct composite_context *result, *ctx;
	struct sock_connect_state *state;
	int i;

	result = talloc_zero(mem_ctx, struct composite_context);
	if (result == NULL) goto failed;
	result->state = COMPOSITE_STATE_IN_PROGRESS;

	if (event_ctx != NULL) {
		result->event_ctx = talloc_reference(result, event_ctx);
	} else {
		result->event_ctx = event_context_init(result);
	}

	if (result->event_ctx == NULL) goto failed;

	state = talloc(result, struct sock_connect_state);
	if (state == NULL) goto failed;
	state->ctx = result;
	result->private_data = state;

	state->host_name = talloc_strdup(state, host_name);
	if (state->host_name == NULL) goto failed;

	state->num_ports = str_list_length(ports);
	state->ports = talloc_array(state, uint16_t, state->num_ports);
	if (state->ports == NULL) goto failed;
	for (i=0;ports[i];i++) {
		state->ports[i] = atoi(ports[i]);
	}
	state->socket_options = lp_socket_options(global_loadparm);

	ctx = socket_connect_multi_send(state, host_addr,
					state->num_ports, state->ports,
					resolve_ctx,
					state->ctx->event_ctx);
	if (ctx == NULL) goto failed;
	ctx->async.fn = smbcli_sock_connect_recv_conn;
	ctx->async.private_data = state;
	return result;

failed:
	talloc_free(result);
	return NULL;
}

static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
{
	struct sock_connect_state *state =
		talloc_get_type(ctx->async.private_data,
				struct sock_connect_state);
	struct socket_context *sock;
	uint16_t port;

	state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
						       &port);
	if (!composite_is_ok(state->ctx)) return;

	state->ctx->status =
		socket_set_option(sock, state->socket_options, NULL);
	if (!composite_is_ok(state->ctx)) return;


	state->result = talloc_zero(state, struct smbcli_socket);
	if (composite_nomem(state->result, state->ctx)) return;

	state->result->sock = talloc_steal(state->result, sock);
	state->result->port = port;
	state->result->hostname = talloc_steal(sock, state->host_name);

	state->result->event.ctx =
		talloc_reference(state->result, state->ctx->event_ctx);
	if (composite_nomem(state->result->event.ctx, state->ctx)) return;

	composite_done(state->ctx);
}

/*
  finish a smbcli_sock_connect_send() operation
*/
NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
				  TALLOC_CTX *mem_ctx,
				  struct smbcli_socket **result)
{
	NTSTATUS status = composite_wait(c);
	if (NT_STATUS_IS_OK(status)) {
		struct sock_connect_state *state =
			talloc_get_type(c->private_data,
					struct sock_connect_state);
		*result = talloc_steal(mem_ctx, state->result);
	}
	talloc_free(c);
	return status;
}

/*
  connect a smbcli_socket context to an IP/port pair
  if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)

  sync version of the function
*/
NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
			     const char *host_addr, const char **ports,
			     const char *host_name,
			     struct resolve_context *resolve_ctx,
			     struct event_context *event_ctx,
			     struct smbcli_socket **result)
{
	struct composite_context *c =
		smbcli_sock_connect_send(mem_ctx, host_addr, ports, host_name,
					 resolve_ctx,
					 event_ctx);
	return smbcli_sock_connect_recv(c, mem_ctx, result);
}


/****************************************************************************
 mark the socket as dead
****************************************************************************/
void smbcli_sock_dead(struct smbcli_socket *sock)
{
	talloc_free(sock->event.fde);
	sock->event.fde = NULL;
	talloc_free(sock->sock);
	sock->sock = NULL;
}

/****************************************************************************
 Set socket options on a open connection.
****************************************************************************/
void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
{
	socket_set_option(sock->sock, options, NULL);
}

/****************************************************************************
resolve a hostname and connect 
****************************************************************************/
struct smbcli_socket *smbcli_sock_connect_byname(const char *host, const char **ports,
						 TALLOC_CTX *mem_ctx,
						 struct resolve_context *resolve_ctx,
						 struct event_context *event_ctx)
{
	int name_type = NBT_NAME_SERVER;
	const char *address;
	NTSTATUS status;
	struct nbt_name nbt_name;
	char *name, *p;
	TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
	struct smbcli_socket *result;

	if (tmp_ctx == NULL) {
		DEBUG(0, ("talloc_new failed\n"));
		return NULL;
	}

	name = talloc_strdup(tmp_ctx, host);
	if (name == NULL) {
		DEBUG(0, ("talloc_strdup failed\n"));
		talloc_free(tmp_ctx);
		return NULL;
	}

	if (event_ctx == NULL) {
		event_ctx = event_context_init(mem_ctx);
	}

	if (event_ctx == NULL) {
		DEBUG(0, ("event_context_init failed\n"));
		talloc_free(tmp_ctx);
		return NULL;
	}

	/* allow hostnames of the form NAME#xx and do a netbios lookup */
	if ((p = strchr(name, '#'))) {
		name_type = strtol(p+1, NULL, 16);
		*p = 0;
	}

	make_nbt_name(&nbt_name, host, name_type);
	
	status = resolve_name(resolve_ctx, &nbt_name, tmp_ctx, &address, event_ctx);
	if (!NT_STATUS_IS_OK(status)) {
		talloc_free(tmp_ctx);
		return NULL;
	}

	status = smbcli_sock_connect(mem_ctx, address, ports, name, resolve_ctx,
				     event_ctx, &result);

	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(9, ("smbcli_sock_connect failed: %s\n",
			  nt_errstr(status)));
		talloc_free(tmp_ctx);
		return NULL;
	}

	talloc_free(tmp_ctx);

	return result;
}