diff options
Diffstat (limited to 'source4/wrepl_server')
| -rw-r--r-- | source4/wrepl_server/wrepl_in_connection.c | 319 | ||||
| -rw-r--r-- | source4/wrepl_server/wrepl_server.c | 308 |
2 files changed, 330 insertions, 297 deletions
diff --git a/source4/wrepl_server/wrepl_in_connection.c b/source4/wrepl_server/wrepl_in_connection.c new file mode 100644 index 0000000000..ed9c9998d7 --- /dev/null +++ b/source4/wrepl_server/wrepl_in_connection.c @@ -0,0 +1,319 @@ +/* + 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 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" +#include "dlinklist.h" +#include "lib/events/events.h" +#include "lib/socket/socket.h" +#include "smbd/service_task.h" +#include "smbd/service_stream.h" +#include "lib/messaging/irpc.h" +#include "librpc/gen_ndr/ndr_winsrepl.h" +#include "wrepl_server/wrepl_server.h" +#include "nbt_server/wins/winsdb.h" +#include "ldb/include/ldb.h" + +static void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn, const char *reason) +{ + stream_terminate_connection(wreplconn->conn, reason); +} + +/* + 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; + const char *peer_ip; + + wreplconn = talloc_zero(conn, struct wreplsrv_in_connection); + if (!wreplconn) { + stream_terminate_connection(conn, "wreplsrv_accept: out of memory"); + return; + } + + wreplconn->conn = conn; + wreplconn->service = service; + wreplconn->our_ip = socket_get_my_addr(conn->socket, wreplconn); + if (!wreplconn->our_ip) { + wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory"); + return; + } + + peer_ip = socket_get_peer_addr(conn->socket, wreplconn); + if (!peer_ip) { + wreplsrv_terminate_in_connection(wreplconn, "wreplsrv_accept: out of memory"); + return; + } + + wreplconn->partner = wreplsrv_find_partner(service, peer_ip); + + conn->private = wreplconn; + + irpc_add_name(conn->msg_ctx, "wreplsrv_connection"); +} + +/* + receive some data on a WREPL connection +*/ +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); + struct wreplsrv_in_call *call; + DATA_BLOB packet_in_blob; + DATA_BLOB packet_out_blob; + struct wrepl_wrap packet_out_wrap; + struct data_blob_list_item *rep; + NTSTATUS status = NT_STATUS_UNSUCCESSFUL; + size_t nread; + + /* avoid recursion, because of half async code */ + if (wreplconn->processing) { + EVENT_FD_NOT_READABLE(conn->event.fde); + return; + } + + if (wreplconn->partial.length == 0) { + wreplconn->partial = data_blob_talloc(wreplconn, NULL, 4); + if (wreplconn->partial.data == NULL) { + status = NT_STATUS_NO_MEMORY; + goto failed; + } + wreplconn->partial_read = 0; + } + + /* read in the packet length */ + if (wreplconn->partial_read < 4) { + uint32_t packet_length; + + status = socket_recv(conn->socket, + wreplconn->partial.data + wreplconn->partial_read, + 4 - wreplconn->partial_read, + &nread, 0); + if (NT_STATUS_IS_ERR(status)) goto failed; + if (!NT_STATUS_IS_OK(status)) return; + + wreplconn->partial_read += nread; + if (wreplconn->partial_read != 4) return; + + packet_length = RIVAL(wreplconn->partial.data, 0) + 4; + + wreplconn->partial.data = talloc_realloc(wreplconn, wreplconn->partial.data, + uint8_t, packet_length); + if (wreplconn->partial.data == NULL) { + status = NT_STATUS_NO_MEMORY; + goto failed; + } + wreplconn->partial.length = packet_length; + } + + /* read in the body */ + status = socket_recv(conn->socket, + wreplconn->partial.data + wreplconn->partial_read, + wreplconn->partial.length - wreplconn->partial_read, + &nread, 0); + if (NT_STATUS_IS_ERR(status)) goto failed; + if (!NT_STATUS_IS_OK(status)) return; + + wreplconn->partial_read += nread; + if (wreplconn->partial_read != wreplconn->partial.length) return; + + packet_in_blob.data = wreplconn->partial.data + 4; + packet_in_blob.length = wreplconn->partial.length - 4; + + call = talloc_zero(wreplconn, struct wreplsrv_in_call); + if (!call) { + status = NT_STATUS_NO_MEMORY; + goto failed; + } + call->wreplconn = wreplconn; + + /* we have a full request - parse it */ + status = ndr_pull_struct_blob(&packet_in_blob, + call, &call->req_packet, + (ndr_pull_flags_fn_t)ndr_pull_wrepl_packet); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(2,("Failed to parse incoming WINS-Replication packet - %s\n", + nt_errstr(status))); + DEBUG(10,("packet length %u\n", wreplconn->partial.length)); + NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet); + goto failed; + } + + /* + * we have parsed the request, so we can reset the wreplconn->partial_read, + * maybe we could also free wreplconn->partial, but for now we keep it, + * and overwrite it the next time + */ + wreplconn->partial_read = 0; + + if (DEBUGLVL(10)) { + DEBUG(10,("Received WINS-Replication packet of length %u\n", wreplconn->partial.length)); + NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet); + } + + /* actually process the request */ + wreplconn->processing = True; + status = wreplsrv_in_call(call); + wreplconn->processing = False; + if (NT_STATUS_IS_ERR(status)) goto failed; + 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; + } + + /* and now encode the reply */ + packet_out_wrap.packet = call->rep_packet; + status = ndr_push_struct_blob(&packet_out_blob, call, &packet_out_wrap, + (ndr_push_flags_fn_t)ndr_push_wrepl_wrap); + if (!NT_STATUS_IS_OK(status)) goto failed; + + 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); + } + + rep = talloc(wreplconn, struct data_blob_list_item); + if (!rep) { + status = NT_STATUS_NO_MEMORY; + goto failed; + } + + rep->blob = packet_out_blob; + talloc_steal(rep, packet_out_blob.data); + /* we don't need the call anymore */ + talloc_free(call); + + if (!wreplconn->send_queue) { + EVENT_FD_WRITEABLE(conn->event.fde); + } + DLIST_ADD_END(wreplconn->send_queue, rep, struct data_blob_list_item *); + + if (wreplconn->terminate) { + EVENT_FD_NOT_READABLE(conn->event.fde); + } else { + EVENT_FD_READABLE(conn->event.fde); + } + return; + +failed: + wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status)); +} + +/* + called when we can write to a connection +*/ +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); + NTSTATUS status; + + while (wreplconn->send_queue) { + struct data_blob_list_item *rep = wreplconn->send_queue; + size_t sendlen; + + status = socket_send(conn->socket, &rep->blob, &sendlen, 0); + if (NT_STATUS_IS_ERR(status)) goto failed; + if (!NT_STATUS_IS_OK(status)) return; + + rep->blob.length -= sendlen; + rep->blob.data += sendlen; + + if (rep->blob.length == 0) { + DLIST_REMOVE(wreplconn->send_queue, rep); + talloc_free(rep); + } + } + + if (wreplconn->terminate) { + wreplsrv_terminate_in_connection(wreplconn, "connection terminated after all pending packets are send"); + return; + } + + EVENT_FD_NOT_WRITEABLE(conn->event.fde); + return; + +failed: + wreplsrv_terminate_in_connection(wreplconn, nt_errstr(status)); +} + +static const struct stream_server_ops wreplsrv_stream_ops = { + .name = "wreplsrv", + .accept_connection = wreplsrv_accept, + .recv_handler = wreplsrv_recv, + .send_handler = wreplsrv_send, +}; + +/* + startup the wrepl port 42 server sockets +*/ +NTSTATUS wreplsrv_setup_sockets(struct wreplsrv_service *service) +{ + 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_bind_interfaces_only()) { + int num_interfaces = iface_count(); + int i; + + /* 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(i); + status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops, + "ipv4", address, &port, 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(); + status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops, + "ipv4", address, &port, 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; +} diff --git a/source4/wrepl_server/wrepl_server.c b/source4/wrepl_server/wrepl_server.c index e2da68d2b4..866090f400 100644 --- a/source4/wrepl_server/wrepl_server.c +++ b/source4/wrepl_server/wrepl_server.c @@ -32,12 +32,20 @@ #include "nbt_server/wins/winsdb.h" #include "ldb/include/ldb.h" -void wreplsrv_terminate_connection(struct wreplsrv_in_connection *wreplconn, const char *reason) +/* + open winsdb +*/ +static NTSTATUS wreplsrv_open_winsdb(struct wreplsrv_service *service) { - stream_terminate_connection(wreplconn->conn, reason); + service->wins_db = winsdb_connect(service); + if (!service->wins_db) { + return NT_STATUS_INTERNAL_DB_ERROR; + } + + return NT_STATUS_OK; } -static struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *service, const char *peer_addr) +struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *service, const char *peer_addr) { struct wreplsrv_partner *cur; @@ -51,248 +59,6 @@ static struct wreplsrv_partner *wreplsrv_find_partner(struct wreplsrv_service *s } /* - 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; - const char *peer_ip; - - wreplconn = talloc_zero(conn, struct wreplsrv_in_connection); - if (!wreplconn) { - stream_terminate_connection(conn, "wreplsrv_accept: out of memory"); - return; - } - - wreplconn->conn = conn; - wreplconn->service = service; - wreplconn->our_ip = socket_get_my_addr(conn->socket, wreplconn); - if (!wreplconn->our_ip) { - wreplsrv_terminate_connection(wreplconn, "wreplsrv_accept: out of memory"); - return; - } - - peer_ip = socket_get_peer_addr(conn->socket, wreplconn); - if (!peer_ip) { - wreplsrv_terminate_connection(wreplconn, "wreplsrv_accept: out of memory"); - return; - } - - wreplconn->partner = wreplsrv_find_partner(service, peer_ip); - - conn->private = wreplconn; - - irpc_add_name(conn->msg_ctx, "wreplsrv_connection"); -} - -/* - receive some data on a WREPL connection -*/ -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); - struct wreplsrv_in_call *call; - DATA_BLOB packet_in_blob; - DATA_BLOB packet_out_blob; - struct wrepl_wrap packet_out_wrap; - struct data_blob_list_item *rep; - NTSTATUS status = NT_STATUS_UNSUCCESSFUL; - size_t nread; - - /* avoid recursion, because of half async code */ - if (wreplconn->processing) { - EVENT_FD_NOT_READABLE(conn->event.fde); - return; - } - - if (wreplconn->partial.length == 0) { - wreplconn->partial = data_blob_talloc(wreplconn, NULL, 4); - if (wreplconn->partial.data == NULL) { - status = NT_STATUS_NO_MEMORY; - goto failed; - } - wreplconn->partial_read = 0; - } - - /* read in the packet length */ - if (wreplconn->partial_read < 4) { - uint32_t packet_length; - - status = socket_recv(conn->socket, - wreplconn->partial.data + wreplconn->partial_read, - 4 - wreplconn->partial_read, - &nread, 0); - if (NT_STATUS_IS_ERR(status)) goto failed; - if (!NT_STATUS_IS_OK(status)) return; - - wreplconn->partial_read += nread; - if (wreplconn->partial_read != 4) return; - - packet_length = RIVAL(wreplconn->partial.data, 0) + 4; - - wreplconn->partial.data = talloc_realloc(wreplconn, wreplconn->partial.data, - uint8_t, packet_length); - if (wreplconn->partial.data == NULL) { - status = NT_STATUS_NO_MEMORY; - goto failed; - } - wreplconn->partial.length = packet_length; - } - - /* read in the body */ - status = socket_recv(conn->socket, - wreplconn->partial.data + wreplconn->partial_read, - wreplconn->partial.length - wreplconn->partial_read, - &nread, 0); - if (NT_STATUS_IS_ERR(status)) goto failed; - if (!NT_STATUS_IS_OK(status)) return; - - wreplconn->partial_read += nread; - if (wreplconn->partial_read != wreplconn->partial.length) return; - - packet_in_blob.data = wreplconn->partial.data + 4; - packet_in_blob.length = wreplconn->partial.length - 4; - - call = talloc_zero(wreplconn, struct wreplsrv_in_call); - if (!call) { - status = NT_STATUS_NO_MEMORY; - goto failed; - } - call->wreplconn = wreplconn; - - /* we have a full request - parse it */ - status = ndr_pull_struct_blob(&packet_in_blob, - call, &call->req_packet, - (ndr_pull_flags_fn_t)ndr_pull_wrepl_packet); - if (!NT_STATUS_IS_OK(status)) { - DEBUG(2,("Failed to parse incoming WINS-Replication packet - %s\n", - nt_errstr(status))); - DEBUG(10,("packet length %u\n", wreplconn->partial.length)); - NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet); - goto failed; - } - - /* - * we have parsed the request, so we can reset the wreplconn->partial_read, - * maybe we could also free wreplconn->partial, but for now we keep it, - * and overwrite it the next time - */ - wreplconn->partial_read = 0; - - if (DEBUGLVL(10)) { - DEBUG(10,("Received WINS-Replication packet of length %u\n", wreplconn->partial.length)); - NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet); - } - - /* actually process the request */ - wreplconn->processing = True; - status = wreplsrv_in_call(call); - wreplconn->processing = False; - if (NT_STATUS_IS_ERR(status)) goto failed; - 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; - } - - /* and now encode the reply */ - packet_out_wrap.packet = call->rep_packet; - status = ndr_push_struct_blob(&packet_out_blob, call, &packet_out_wrap, - (ndr_push_flags_fn_t)ndr_push_wrepl_wrap); - if (!NT_STATUS_IS_OK(status)) goto failed; - - 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); - } - - rep = talloc(wreplconn, struct data_blob_list_item); - if (!rep) { - status = NT_STATUS_NO_MEMORY; - goto failed; - } - - rep->blob = packet_out_blob; - talloc_steal(rep, packet_out_blob.data); - /* we don't need the call anymore */ - talloc_free(call); - - if (!wreplconn->send_queue) { - EVENT_FD_WRITEABLE(conn->event.fde); - } - DLIST_ADD_END(wreplconn->send_queue, rep, struct data_blob_list_item *); - - if (wreplconn->terminate) { - EVENT_FD_NOT_READABLE(conn->event.fde); - } else { - EVENT_FD_READABLE(conn->event.fde); - } - return; - -failed: - wreplsrv_terminate_connection(wreplconn, nt_errstr(status)); -} - -/* - called when we can write to a connection -*/ -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); - NTSTATUS status; - - while (wreplconn->send_queue) { - struct data_blob_list_item *rep = wreplconn->send_queue; - size_t sendlen; - - status = socket_send(conn->socket, &rep->blob, &sendlen, 0); - if (NT_STATUS_IS_ERR(status)) goto failed; - if (!NT_STATUS_IS_OK(status)) return; - - rep->blob.length -= sendlen; - rep->blob.data += sendlen; - - if (rep->blob.length == 0) { - DLIST_REMOVE(wreplconn->send_queue, rep); - talloc_free(rep); - } - } - - if (wreplconn->terminate) { - wreplsrv_terminate_connection(wreplconn, "connection terminated after all pending packets are send"); - return; - } - - EVENT_FD_NOT_WRITEABLE(conn->event.fde); - return; - -failed: - wreplsrv_terminate_connection(wreplconn, nt_errstr(status)); -} - -static const struct stream_server_ops wreplsrv_stream_ops = { - .name = "wreplsrv", - .accept_connection = wreplsrv_accept, - .recv_handler = wreplsrv_recv, - .send_handler = wreplsrv_send, -}; - -/* - open winsdb -*/ -static NTSTATUS wreplsrv_open_winsdb(struct wreplsrv_service *service) -{ - service->wins_db = winsdb_connect(service); - if (!service->wins_db) { - return NT_STATUS_INTERNAL_DB_ERROR; - } - - return NT_STATUS_OK; -} - -/* load our replication partners */ static NTSTATUS wreplsrv_load_partners(struct wreplsrv_service *service) @@ -492,58 +258,6 @@ static NTSTATUS wreplsrv_setup_partners(struct wreplsrv_service *service) } /* - startup the wrepl port 42 server sockets -*/ -static NTSTATUS wreplsrv_setup_sockets(struct wreplsrv_service *service) -{ - 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_bind_interfaces_only()) { - int num_interfaces = iface_count(); - int i; - - /* 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(i); - status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops, - "ipv4", address, &port, 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(); - status = stream_setup_socket(task->event_ctx, model_ops, &wreplsrv_stream_ops, - "ipv4", address, &port, 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; -} - -/* startup the wrepl task */ static void wreplsrv_task_init(struct task_server *task) |