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samba-mirror/source4/wrepl_server/wrepl_in_connection.c
2008-09-22 18:16:09 +02:00

324 lines
10 KiB
C

/*
Unix SMB/CIFS implementation.
WINS Replication server
Copyright (C) Stefan Metzmacher 2005
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/socket/socket.h"
#include "lib/stream/packet.h"
#include "smbd/service_task.h"
#include "smbd/service_stream.h"
#include "smbd/service.h"
#include "lib/messaging/irpc.h"
#include "librpc/gen_ndr/ndr_winsrepl.h"
#include "wrepl_server/wrepl_server.h"
#include "smbd/process_model.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "param/param.h"
void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn, const char *reason)
{
stream_terminate_connection(wreplconn->conn, reason);
}
static int terminate_after_send_destructor(struct wreplsrv_in_connection **tas)
{
wreplsrv_terminate_in_connection(*tas, "wreplsrv_in_connection: terminate_after_send");
return 0;
}
/*
receive some data on a WREPL connection
*/
static NTSTATUS wreplsrv_recv_request(void *private, DATA_BLOB blob)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(private, struct wreplsrv_in_connection);
struct wreplsrv_in_call *call;
DATA_BLOB packet_in_blob;
DATA_BLOB packet_out_blob;
struct wrepl_wrap packet_out_wrap;
NTSTATUS status;
enum ndr_err_code ndr_err;
call = talloc_zero(wreplconn, struct wreplsrv_in_call);
NT_STATUS_HAVE_NO_MEMORY(call);
call->wreplconn = wreplconn;
talloc_steal(call, blob.data);
packet_in_blob.data = blob.data + 4;
packet_in_blob.length = blob.length - 4;
ndr_err = ndr_pull_struct_blob(&packet_in_blob, call,
lp_iconv_convenience(wreplconn->service->task->lp_ctx),
&call->req_packet,
(ndr_pull_flags_fn_t)ndr_pull_wrepl_packet);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return ndr_map_error2ntstatus(ndr_err);
}
if (DEBUGLVL(10)) {
DEBUG(10,("Received WINS-Replication packet of length %u\n",
(unsigned)packet_in_blob.length + 4));
NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet);
}
status = wreplsrv_in_call(call);
NT_STATUS_IS_ERR_RETURN(status);
if (!NT_STATUS_IS_OK(status)) {
/* w2k just ignores invalid packets, so we do */
DEBUG(10,("Received WINS-Replication packet was invalid, we just ignore it\n"));
talloc_free(call);
return NT_STATUS_OK;
}
/* and now encode the reply */
packet_out_wrap.packet = call->rep_packet;
ndr_err = ndr_push_struct_blob(&packet_out_blob, call,
lp_iconv_convenience(wreplconn->service->task->lp_ctx),
&packet_out_wrap,
(ndr_push_flags_fn_t)ndr_push_wrepl_wrap);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
return ndr_map_error2ntstatus(ndr_err);
}
if (DEBUGLVL(10)) {
DEBUG(10,("Sending WINS-Replication packet of length %d\n", (int)packet_out_blob.length));
NDR_PRINT_DEBUG(wrepl_packet, &call->rep_packet);
}
if (call->terminate_after_send) {
struct wreplsrv_in_connection **tas;
tas = talloc(packet_out_blob.data, struct wreplsrv_in_connection *);
NT_STATUS_HAVE_NO_MEMORY(tas);
*tas = wreplconn;
talloc_set_destructor(tas, terminate_after_send_destructor);
}
status = packet_send(wreplconn->packet, packet_out_blob);
NT_STATUS_NOT_OK_RETURN(status);
talloc_free(call);
return NT_STATUS_OK;
}
/*
called when the socket becomes readable
*/
static void wreplsrv_recv(struct stream_connection *conn, uint16_t flags)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private,
struct wreplsrv_in_connection);
packet_recv(wreplconn->packet);
}
/*
called when the socket becomes writable
*/
static void wreplsrv_send(struct stream_connection *conn, uint16_t flags)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(conn->private,
struct wreplsrv_in_connection);
packet_queue_run(wreplconn->packet);
}
/*
handle socket recv errors
*/
static void wreplsrv_recv_error(void *private, NTSTATUS status)
{
struct wreplsrv_in_connection *wreplconn = talloc_get_type(private,
struct wreplsrv_in_connection);
wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status));
}
/*
called when we get a new connection
*/
static void wreplsrv_accept(struct stream_connection *conn)
{
struct wreplsrv_service *service = talloc_get_type(conn->private, struct wreplsrv_service);
struct wreplsrv_in_connection *wreplconn;
struct socket_address *peer_ip;
wreplconn = talloc_zero(conn, struct wreplsrv_in_connection);
if (!wreplconn) {
stream_terminate_connection(conn, "wreplsrv_accept: out of memory");
return;
}
wreplconn->packet = packet_init(wreplconn);
if (!wreplconn->packet) {
wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory");
return;
}
packet_set_private(wreplconn->packet, wreplconn);
packet_set_socket(wreplconn->packet, conn->socket);
packet_set_callback(wreplconn->packet, wreplsrv_recv_request);
packet_set_full_request(wreplconn->packet, packet_full_request_u32);
packet_set_error_handler(wreplconn->packet, wreplsrv_recv_error);
packet_set_event_context(wreplconn->packet, conn->event.ctx);
packet_set_fde(wreplconn->packet, conn->event.fde);
packet_set_serialise(wreplconn->packet);
wreplconn->conn = conn;
wreplconn->service = service;
peer_ip = socket_get_peer_addr(conn->socket, wreplconn);
if (!peer_ip) {
wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: could not obtain peer IP from kernel");
return;
}
wreplconn->partner = wreplsrv_find_partner(service, peer_ip->addr);
conn->private = wreplconn;
irpc_add_name(conn->msg_ctx, "wreplsrv_connection");
}
static const struct stream_server_ops wreplsrv_stream_ops = {
.name = "wreplsrv",
.accept_connection = wreplsrv_accept,
.recv_handler = wreplsrv_recv,
.send_handler = wreplsrv_send,
};
/*
called when we get a new connection
*/
NTSTATUS wreplsrv_in_connection_merge(struct wreplsrv_partner *partner,
struct socket_context *sock,
struct packet_context *packet,
struct wreplsrv_in_connection **_wrepl_in)
{
struct wreplsrv_service *service = partner->service;
struct wreplsrv_in_connection *wrepl_in;
const struct model_ops *model_ops;
struct stream_connection *conn;
NTSTATUS status;
/* within the wrepl task we want to be a single process, so
ask for the single process model ops and pass these to the
stream_setup_socket() call. */
model_ops = process_model_startup(service->task->event_ctx, "single");
if (!model_ops) {
DEBUG(0,("Can't find 'single' process model_ops"));
return NT_STATUS_INTERNAL_ERROR;
}
wrepl_in = talloc_zero(partner, struct wreplsrv_in_connection);
NT_STATUS_HAVE_NO_MEMORY(wrepl_in);
wrepl_in->service = service;
wrepl_in->partner = partner;
status = stream_new_connection_merge(service->task->event_ctx, service->task->lp_ctx, model_ops,
sock, &wreplsrv_stream_ops, service->task->msg_ctx,
wrepl_in, &conn);
NT_STATUS_NOT_OK_RETURN(status);
/*
* make the wreplsrv_in_connection structure a child of the
* stream_connection, to match the hierachie of wreplsrv_accept
*/
wrepl_in->conn = conn;
talloc_steal(conn, wrepl_in);
/*
* now update the packet handling callback,...
*/
wrepl_in->packet = talloc_steal(wrepl_in, packet);
packet_set_private(wrepl_in->packet, wrepl_in);
packet_set_socket(wrepl_in->packet, conn->socket);
packet_set_callback(wrepl_in->packet, wreplsrv_recv_request);
packet_set_full_request(wrepl_in->packet, packet_full_request_u32);
packet_set_error_handler(wrepl_in->packet, wreplsrv_recv_error);
packet_set_event_context(wrepl_in->packet, conn->event.ctx);
packet_set_fde(wrepl_in->packet, conn->event.fde);
packet_set_serialise(wrepl_in->packet);
*_wrepl_in = wrepl_in;
return NT_STATUS_OK;
}
/*
startup the wrepl port 42 server sockets
*/
NTSTATUS wreplsrv_setup_sockets(struct wreplsrv_service *service, struct loadparm_context *lp_ctx)
{
NTSTATUS status;
struct task_server *task = service->task;
const struct model_ops *model_ops;
const char *address;
uint16_t port = WINS_REPLICATION_PORT;
/* within the wrepl task we want to be a single process, so
ask for the single process model ops and pass these to the
stream_setup_socket() call. */
model_ops = process_model_startup(task->event_ctx, "single");
if (!model_ops) {
DEBUG(0,("Can't find 'single' process model_ops"));
return NT_STATUS_INTERNAL_ERROR;
}
if (lp_interfaces(lp_ctx) && lp_bind_interfaces_only(lp_ctx)) {
int num_interfaces;
int i;
struct interface *ifaces;
load_interfaces(task, lp_interfaces(lp_ctx), &ifaces);
num_interfaces = iface_count(ifaces);
/* We have been given an interfaces line, and been
told to only bind to those interfaces. Create a
socket per interface and bind to only these.
*/
for(i = 0; i < num_interfaces; i++) {
address = iface_n_ip(ifaces, i);
status = stream_setup_socket(task->event_ctx,
task->lp_ctx, model_ops,
&wreplsrv_stream_ops,
"ipv4", address, &port,
lp_socket_options(task->lp_ctx),
service);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("stream_setup_socket(address=%s,port=%u) failed - %s\n",
address, port, nt_errstr(status)));
return status;
}
}
} else {
address = lp_socket_address(lp_ctx);
status = stream_setup_socket(task->event_ctx, task->lp_ctx,
model_ops, &wreplsrv_stream_ops,
"ipv4", address, &port, lp_socket_options(task->lp_ctx),
service);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("stream_setup_socket(address=%s,port=%u) failed - %s\n",
address, port, nt_errstr(status)));
return status;
}
}
return NT_STATUS_OK;
}