/* 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_byname("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, 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_byname("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; }