Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 471 insertions, 0 deletions

diff --git a/source4/wrepl_server/wrepl_in_connection.c b/source4/wrepl_server/wrepl_in_connection.c
new file mode 100644
index 0000000..c68214d
--- /dev/null
+++ b/source4/wrepl_server/wrepl_in_connection.c
@@ -0,0 +1,471 @@
+/* 
+   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 "samba/service_task.h"
+#include "samba/service_stream.h"
+#include "samba/service.h"
+#include "lib/messaging/irpc.h"
+#include "librpc/gen_ndr/ndr_winsrepl.h"
+#include "wrepl_server/wrepl_server.h"
+#include "samba/process_model.h"
+#include "system/network.h"
+#include "lib/socket/netif.h"
+#include "lib/tsocket/tsocket.h"
+#include "libcli/util/tstream.h"
+#include "param/param.h"
+
+void wreplsrv_terminate_in_connection(struct wreplsrv_in_connection *wreplconn, const char *reason)
+{
+	stream_terminate_connection(wreplconn->conn, reason);
+}
+
+/*
+  receive some data on a WREPL connection
+*/
+static NTSTATUS wreplsrv_process(struct wreplsrv_in_connection *wrepl_conn,
+				 struct wreplsrv_in_call **_call)
+{
+	struct wrepl_wrap packet_out_wrap;
+	NTSTATUS status;
+	enum ndr_err_code ndr_err;
+	struct wreplsrv_in_call *call = *_call;
+
+	ndr_err = ndr_pull_struct_blob(&call->in, call,
+				       &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 int) call->in.length + 4));
+		NDR_PRINT_DEBUG(wrepl_packet, &call->req_packet);
+	}
+
+	status = wreplsrv_in_call(call);
+	if (NT_STATUS_IS_ERR(status)) {
+		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);
+		*_call = NULL;
+		return NT_STATUS_OK;
+	}
+
+	/* and now encode the reply */
+	packet_out_wrap.packet = call->rep_packet;
+	ndr_err = ndr_push_struct_blob(&call->out, call,
+				       &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 %u\n",
+			 (unsigned int) call->out.length));
+		NDR_PRINT_DEBUG(wrepl_packet, &call->rep_packet);
+	}
+
+	return NT_STATUS_OK;
+}
+
+static void wreplsrv_call_loop(struct tevent_req *subreq);
+
+/*
+  called when we get a new connection
+*/
+static void wreplsrv_accept(struct stream_connection *conn)
+{
+	struct wreplsrv_service *service = talloc_get_type(conn->private_data, struct wreplsrv_service);
+	struct wreplsrv_in_connection *wrepl_conn;
+	struct tsocket_address *peer_addr;
+	char *peer_ip;
+	struct tevent_req *subreq;
+	int rc;
+
+	wrepl_conn = talloc_zero(conn, struct wreplsrv_in_connection);
+	if (wrepl_conn == NULL) {
+		stream_terminate_connection(conn,
+					    "wreplsrv_accept: out of memory");
+		return;
+	}
+
+	wrepl_conn->send_queue = tevent_queue_create(conn, "wrepl_accept");
+	if (wrepl_conn->send_queue == NULL) {
+		stream_terminate_connection(conn,
+					    "wrepl_accept: out of memory");
+		return;
+	}
+
+	TALLOC_FREE(conn->event.fde);
+
+	rc = tstream_bsd_existing_socket(wrepl_conn,
+					 socket_get_fd(conn->socket),
+					 &wrepl_conn->tstream);
+	if (rc < 0) {
+		stream_terminate_connection(conn,
+					    "wrepl_accept: out of memory");
+		return;
+	}
+	socket_set_flags(conn->socket, SOCKET_FLAG_NOCLOSE);
+
+	wrepl_conn->conn = conn;
+	wrepl_conn->service = service;
+
+	peer_addr = conn->remote_address;
+
+	if (!tsocket_address_is_inet(peer_addr, "ipv4")) {
+		DEBUG(0,("wreplsrv_accept: non ipv4 peer addr '%s'\n",
+			tsocket_address_string(peer_addr, wrepl_conn)));
+		wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_accept: "
+				"invalid peer IP");
+		return;
+	}
+
+	peer_ip = tsocket_address_inet_addr_string(peer_addr, wrepl_conn);
+	if (peer_ip == NULL) {
+		wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_accept: "
+				"could not convert peer IP into a string");
+		return;
+	}
+
+	wrepl_conn->partner = wreplsrv_find_partner(service, peer_ip);
+	irpc_add_name(conn->msg_ctx, "wreplsrv_connection");
+
+	/*
+	 * The wrepl pdu's has the length as 4 byte (initial_read_size),
+	 * packet_full_request_u32 provides the pdu length then.
+	 */
+	subreq = tstream_read_pdu_blob_send(wrepl_conn,
+					    wrepl_conn->conn->event.ctx,
+					    wrepl_conn->tstream,
+					    4, /* initial_read_size */
+					    packet_full_request_u32,
+					    wrepl_conn);
+	if (subreq == NULL) {
+		wreplsrv_terminate_in_connection(wrepl_conn, "wrepl_accept: "
+				"no memory for tstream_read_pdu_blob_send");
+		return;
+	}
+	tevent_req_set_callback(subreq, wreplsrv_call_loop, wrepl_conn);
+}
+
+static void wreplsrv_call_writev_done(struct tevent_req *subreq);
+
+static void wreplsrv_call_loop(struct tevent_req *subreq)
+{
+	struct wreplsrv_in_connection *wrepl_conn = tevent_req_callback_data(subreq,
+				      struct wreplsrv_in_connection);
+	struct wreplsrv_in_call *call;
+	NTSTATUS status;
+
+	call = talloc_zero(wrepl_conn, struct wreplsrv_in_call);
+	if (call == NULL) {
+		wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_call_loop: "
+				"no memory for wrepl_samba3_call");
+		return;
+	}
+	call->wreplconn = wrepl_conn;
+
+	status = tstream_read_pdu_blob_recv(subreq,
+					    call,
+					    &call->in);
+	TALLOC_FREE(subreq);
+	if (!NT_STATUS_IS_OK(status)) {
+		const char *reason;
+
+		reason = talloc_asprintf(call, "wreplsrv_call_loop: "
+					 "tstream_read_pdu_blob_recv() - %s",
+					 nt_errstr(status));
+		if (!reason) {
+			reason = nt_errstr(status);
+		}
+
+		wreplsrv_terminate_in_connection(wrepl_conn, reason);
+		return;
+	}
+
+	DEBUG(10,("Received wrepl packet of length %lu from %s\n",
+		 (long) call->in.length,
+		 tsocket_address_string(wrepl_conn->conn->remote_address, call)));
+
+	/* skip length header */
+	call->in.data += 4;
+	call->in.length -= 4;
+
+	status = wreplsrv_process(wrepl_conn, &call);
+	if (!NT_STATUS_IS_OK(status)) {
+		const char *reason;
+
+		reason = talloc_asprintf(call, "wreplsrv_call_loop: "
+					 "tstream_read_pdu_blob_recv() - %s",
+					 nt_errstr(status));
+		if (reason == NULL) {
+			reason = nt_errstr(status);
+		}
+
+		wreplsrv_terminate_in_connection(wrepl_conn, reason);
+		return;
+	}
+
+	/* We handed over the connection so we're done here */
+	if (wrepl_conn->tstream == NULL) {
+	    return;
+	}
+
+	/* Invalid WINS-Replication packet, we just ignore it */
+	if (call == NULL) {
+		goto noreply;
+	}
+
+	call->out_iov[0].iov_base = (char *) call->out.data;
+	call->out_iov[0].iov_len = call->out.length;
+
+	subreq = tstream_writev_queue_send(call,
+					   wrepl_conn->conn->event.ctx,
+					   wrepl_conn->tstream,
+					   wrepl_conn->send_queue,
+					   call->out_iov, 1);
+	if (subreq == NULL) {
+		wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_call_loop: "
+				"no memory for tstream_writev_queue_send");
+		return;
+	}
+	tevent_req_set_callback(subreq, wreplsrv_call_writev_done, call);
+
+noreply:
+	/*
+	 * The wrepl pdu's has the length as 4 byte (initial_read_size),
+	 *  provides the pdu length then.
+	 */
+	subreq = tstream_read_pdu_blob_send(wrepl_conn,
+					    wrepl_conn->conn->event.ctx,
+					    wrepl_conn->tstream,
+					    4, /* initial_read_size */
+					    packet_full_request_u32,
+					    wrepl_conn);
+	if (subreq == NULL) {
+		wreplsrv_terminate_in_connection(wrepl_conn, "wreplsrv_call_loop: "
+				"no memory for tstream_read_pdu_blob_send");
+		return;
+	}
+	tevent_req_set_callback(subreq, wreplsrv_call_loop, wrepl_conn);
+}
+
+static void wreplsrv_call_writev_done(struct tevent_req *subreq)
+{
+	struct wreplsrv_in_call *call = tevent_req_callback_data(subreq,
+			struct wreplsrv_in_call);
+	int sys_errno;
+	int rc;
+
+	rc = tstream_writev_queue_recv(subreq, &sys_errno);
+	TALLOC_FREE(subreq);
+	if (rc == -1) {
+		const char *reason;
+
+		reason = talloc_asprintf(call, "wreplsrv_call_writev_done: "
+					 "tstream_writev_queue_recv() - %d:%s",
+					 sys_errno, strerror(sys_errno));
+		if (reason == NULL) {
+			reason = "wreplsrv_call_writev_done: "
+				 "tstream_writev_queue_recv() failed";
+		}
+
+		wreplsrv_terminate_in_connection(call->wreplconn, reason);
+		return;
+	}
+
+	if (call->terminate_after_send) {
+		wreplsrv_terminate_in_connection(call->wreplconn,
+				"wreplsrv_in_connection: terminate_after_send");
+		return;
+	}
+
+	talloc_free(call);
+}
+
+/*
+  called on a tcp recv
+*/
+static void wreplsrv_recv(struct stream_connection *conn, uint16_t flags)
+{
+	struct wreplsrv_in_connection *wrepl_conn = talloc_get_type(conn->private_data,
+							struct wreplsrv_in_connection);
+	/* this should never be triggered! */
+	DEBUG(0,("Terminating connection - '%s'\n", "wrepl_recv: called"));
+	wreplsrv_terminate_in_connection(wrepl_conn, "wrepl_recv: called");
+}
+
+/*
+  called when we can write to a connection
+*/
+static void wreplsrv_send(struct stream_connection *conn, uint16_t flags)
+{
+	struct wreplsrv_in_connection *wrepl_conn = talloc_get_type(conn->private_data,
+							struct wreplsrv_in_connection);
+	/* this should never be triggered! */
+	DEBUG(0,("Terminating connection - '%s'\n", "wrepl_send: called"));
+	wreplsrv_terminate_in_connection(wrepl_conn, "wrepl_send: called");
+}
+
+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,
+				      uint32_t peer_assoc_ctx,
+				      struct tstream_context **stream,
+				      struct wreplsrv_in_connection **_wrepl_in,
+				      void* process_context)
+{
+	struct wreplsrv_service *service = partner->service;
+	struct wreplsrv_in_connection *wrepl_in;
+	struct stream_connection *conn;
+	struct tevent_req *subreq;
+	NTSTATUS status;
+
+	wrepl_in = talloc_zero(partner, struct wreplsrv_in_connection);
+	NT_STATUS_HAVE_NO_MEMORY(wrepl_in);
+
+	wrepl_in->service	= service;
+	wrepl_in->partner	= partner;
+	wrepl_in->tstream	= talloc_move(wrepl_in, stream);
+	wrepl_in->assoc_ctx.peer_ctx = peer_assoc_ctx;
+
+	status = stream_new_connection_merge(service->task->event_ctx,
+					     service->task->lp_ctx,
+					     service->task->model_ops,
+					     &wreplsrv_stream_ops,
+					     service->task->msg_ctx,
+					     wrepl_in,
+					     &conn,
+					     process_context);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	/*
+	 * make the wreplsrv_in_connection structure a child of the
+	 * stream_connection, to match the hierarchy of wreplsrv_accept
+	 */
+	wrepl_in->conn		= conn;
+	talloc_steal(conn, wrepl_in);
+
+	wrepl_in->send_queue = tevent_queue_create(wrepl_in, "wreplsrv_in_connection_merge");
+	if (wrepl_in->send_queue == NULL) {
+		stream_terminate_connection(conn,
+					    "wreplsrv_in_connection_merge: out of memory");
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/*
+	 * The wrepl pdu's has the length as 4 byte (initial_read_size),
+	 * packet_full_request_u32 provides the pdu length then.
+	 */
+	subreq = tstream_read_pdu_blob_send(wrepl_in,
+					    wrepl_in->conn->event.ctx,
+					    wrepl_in->tstream,
+					    4, /* initial_read_size */
+					    packet_full_request_u32,
+					    wrepl_in);
+	if (subreq == NULL) {
+		wreplsrv_terminate_in_connection(wrepl_in, "wreplsrv_in_connection_merge: "
+				"no memory for tstream_read_pdu_blob_send");
+		return NT_STATUS_NO_MEMORY;
+	}
+	tevent_req_set_callback(subreq, wreplsrv_call_loop, wrepl_in);
+
+	*_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 char *address;
+	uint16_t port = WINS_REPLICATION_PORT;
+
+	if (lpcfg_interfaces(lp_ctx) && lpcfg_bind_interfaces_only(lp_ctx)) {
+		int num_interfaces;
+		int i;
+		struct interface *ifaces;
+
+		load_interface_list(task, lp_ctx, &ifaces);
+
+		num_interfaces = iface_list_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++) {
+			if (!iface_list_n_is_v4(ifaces, i)) {
+				continue;
+			}
+			address = iface_list_n_ip(ifaces, i);
+			status = stream_setup_socket(
+					task, task->event_ctx,
+					task->lp_ctx,
+					task->model_ops,
+					&wreplsrv_stream_ops,
+					"ipv4", address, &port,
+					lpcfg_socket_options(task->lp_ctx),
+					service, task->process_context);
+			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 = "0.0.0.0";
+		status = stream_setup_socket(task, task->event_ctx,
+					     task->lp_ctx, task->model_ops,
+					     &wreplsrv_stream_ops,
+					     "ipv4", address, &port,
+					     lpcfg_socket_options(task->lp_ctx),
+					     service, task->process_context);
+		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;
+}