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/*
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 = EPMAPPER_PORT;
}
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;
}
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