summaryrefslogtreecommitdiff
path: root/source4/librpc/rpc/dcerpc_tcp.c
blob: b3523e6855d5bcad24e4c2ca389c459c1e17321f (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
/* 
   Unix SMB/CIFS implementation.

   dcerpc over TCP transport

   Copyright (C) Andrew Tridgell 2003
   
   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"

/* transport private information used by TCP pipe transport */
struct tcp_private {
	int fd;
	char *server_name;
	uint32 port;
};

static NTSTATUS tcp_raw_recv(struct dcerpc_pipe *p, 
			     TALLOC_CTX *mem_ctx,
			     DATA_BLOB *blob)
{
	struct tcp_private *tcp = p->transport.private;
	ssize_t ret;
	uint32 frag_length;
	DATA_BLOB blob1;

	blob1 = data_blob_talloc(mem_ctx, NULL, 16);
	if (!blob1.data) {
		return NT_STATUS_NO_MEMORY;
	}

	ret = read_data(tcp->fd, blob1.data, blob1.length);
	if (ret != blob1.length) {
		return NT_STATUS_NET_WRITE_FAULT;
	}

	/* we might have recieved a partial fragment, in which case we
	   need to pull the rest of it */
	frag_length = SVAL(blob1.data, 8);
	if (frag_length == blob1.length) {
		*blob = blob1;
		return NT_STATUS_OK;
	}

	*blob = data_blob_talloc(mem_ctx, NULL, frag_length);
	if (!blob->data) {
		return NT_STATUS_NO_MEMORY;
	}
	memcpy(blob->data, blob1.data, blob1.length);

	ret = read_data(tcp->fd, blob->data + blob1.length, frag_length - blob1.length);
	if (ret != frag_length - blob1.length) {
		return NT_STATUS_NET_WRITE_FAULT;
	}

	return NT_STATUS_OK;
}

static NTSTATUS tcp_full_request(struct dcerpc_pipe *p, 
				 TALLOC_CTX *mem_ctx,
				 DATA_BLOB *request_blob,
				 DATA_BLOB *reply_blob)
{
	struct tcp_private *tcp = p->transport.private;
	ssize_t ret;

	ret = write_data(tcp->fd, request_blob->data, request_blob->length);
	if (ret != request_blob->length) {
		return NT_STATUS_NET_WRITE_FAULT;
	}

	return tcp_raw_recv(p, mem_ctx, reply_blob);
}
	      

/* 
   retrieve a secondary pdu from a pipe 
*/
NTSTATUS tcp_secondary_request(struct dcerpc_pipe *p, 
			       TALLOC_CTX *mem_ctx,
			       DATA_BLOB *blob)
{
	return tcp_raw_recv(p, mem_ctx, blob);
}


/* 
   send an initial pdu in a multi-pdu sequence
*/
static NTSTATUS tcp_initial_request(struct dcerpc_pipe *p, 
				    TALLOC_CTX *mem_ctx,
				    DATA_BLOB *blob)
{
	struct tcp_private *tcp = p->transport.private;
	ssize_t ret;

	ret = write_data(tcp->fd, blob->data, blob->length);
	if (ret != blob->length) {
		return NT_STATUS_NET_WRITE_FAULT;
	}

	return NT_STATUS_OK;
}


/* 
   shutdown TCP pipe connection
*/
static NTSTATUS tcp_shutdown_pipe(struct dcerpc_pipe *p)
{
	struct tcp_private *tcp = p->transport.private;

	if (tcp) {
		close(tcp->fd);
	}

	return NT_STATUS_OK;
}

/*
  return TCP server name
*/
static const char *tcp_peer_name(struct dcerpc_pipe *p)
{
	struct tcp_private *tcp = p->transport.private;
	return tcp->server_name;
}


/* 
   open a rpc connection to a named pipe 
*/
NTSTATUS dcerpc_pipe_open_tcp(struct dcerpc_pipe **p, 
			      const char *server,
			      uint32 port)
{
	struct tcp_private *tcp;
	int fd;
	struct in_addr addr;

	if (port == 0) {
		port = 135;
	}

	addr.s_addr = interpret_addr(server);
	if (addr.s_addr == 0) {
		return NT_STATUS_BAD_NETWORK_NAME;
	}

	fd = open_socket_out(SOCK_STREAM, &addr, port, 30000);
	if (fd == -1) {
		return NT_STATUS_PORT_CONNECTION_REFUSED;
	}

        if (!(*p = dcerpc_pipe_init())) {
                return NT_STATUS_NO_MEMORY;
	}
 
	/*
	  fill in the transport methods
	*/
	(*p)->transport.private = NULL;
	(*p)->transport.full_request = tcp_full_request;
	(*p)->transport.secondary_request = tcp_secondary_request;
	(*p)->transport.initial_request = tcp_initial_request;
	(*p)->transport.shutdown_pipe = tcp_shutdown_pipe;
	(*p)->transport.peer_name = tcp_peer_name;
	
	tcp = talloc((*p)->mem_ctx, sizeof(*tcp));
	if (!tcp) {
		dcerpc_pipe_close(*p);
		return NT_STATUS_NO_MEMORY;
	}

	tcp->fd = fd;
	tcp->server_name = talloc_strdup((*p)->mem_ctx, server);

	(*p)->transport.private = tcp;

        return NT_STATUS_OK;
}