r5103: forgot to add two new files

these are the stream server helper functions
(This used to be commit 3c5a7650a9730d74503b759bccafbb0fa3bbce78)

2 files changed, 272 insertions, 0 deletions

diff --git a/source4/smbd/service_stream.c b/source4/smbd/service_stream.c
new file mode 100644
index 0000000000..72a6703995
--- /dev/null
+++ b/source4/smbd/service_stream.c
@@ -0,0 +1,215 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   hepler functions for stream based servers
+
+   Copyright (C) Andrew Tridgell 2003-2005
+   Copyright (C) Stefan (metze) Metzmacher	2004
+   
+   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 "process_model.h"
+#include "events.h"
+#include "smbd/service_stream.h"
+
+/* the range of ports to try for dcerpc over tcp endpoints */
+#define SERVER_TCP_LOW_PORT  1024
+#define SERVER_TCP_HIGH_PORT 1300
+
+/* size of listen() backlog in smbd */
+#define SERVER_LISTEN_BACKLOG 10
+
+
+/*
+  private structure for a single listening stream socket
+*/
+struct stream_socket {
+	const struct stream_server_ops *ops;
+	struct event_context *event_ctx;
+	const struct model_ops *model_ops;
+	struct socket_context *sock;
+	void *private;
+};
+
+
+/*
+  close the socket and shutdown a stream_connection
+*/
+void stream_terminate_connection(struct stream_connection *srv_conn, const char *reason)
+{
+	struct event_ctx *event_ctx = srv_conn->event.ctx;
+	const struct model_ops *model_ops = srv_conn->model_ops;
+	talloc_free(srv_conn);
+	model_ops->terminate_connection(event_ctx, reason);
+}
+
+/*
+  the select loop has indicated that a stream is ready for IO
+*/
+static void stream_io_handler(struct event_context *ev, struct fd_event *fde, 
+			      struct timeval t, uint16_t flags)
+{
+	struct stream_connection *conn = talloc_get_type(fde->private, 
+							 struct stream_connection);
+	if (flags & EVENT_FD_WRITE) {
+		conn->ops->send_handler(conn, t, flags);
+		return;
+	}
+
+	if (flags & EVENT_FD_READ) {
+		conn->ops->recv_handler(conn, t, flags);
+	}
+}
+
+
+/*
+  called when a new socket connection has been established. This is called in the process
+  context of the new process (if appropriate)
+*/
+static void stream_new_connection(struct event_context *ev,
+				  struct socket_context *sock, 
+				  uint32_t server_id, void *private)
+{
+	struct stream_socket *stream_socket = talloc_get_type(private, struct stream_socket);
+	struct fd_event fde;
+	struct stream_connection *srv_conn;
+
+	srv_conn = talloc_zero(ev, struct stream_connection);
+	if (!srv_conn) {
+		DEBUG(0,("talloc(mem_ctx, struct stream_connection) failed\n"));
+		return;
+	}
+
+	talloc_steal(srv_conn, sock);
+
+	fde.private 	= srv_conn;
+	fde.fd		= socket_get_fd(sock);
+	fde.flags	= EVENT_FD_READ;
+	fde.handler	= stream_io_handler;
+
+	srv_conn->private       = stream_socket->private;
+	srv_conn->model_ops     = stream_socket->model_ops;
+	srv_conn->event.ctx	= ev;
+	srv_conn->event.fde	= &fde;
+	srv_conn->socket	= sock;
+	srv_conn->server_id	= server_id;
+	srv_conn->ops           = stream_socket->ops;
+	srv_conn->event.fde	= event_add_fd(ev, &fde, srv_conn);
+
+	if (!socket_check_access(sock, "smbd", lp_hostsallow(-1), lp_hostsdeny(-1))) {
+		stream_terminate_connection(srv_conn, "denied by access rules");
+		return;
+	}
+
+	/* setup to receive internal messages on this connection */
+	srv_conn->msg_ctx = messaging_init(srv_conn, srv_conn->server_id, ev);
+	if (!srv_conn->msg_ctx) {
+		stream_terminate_connection(srv_conn, "messaging_init() failed");
+		return;
+	}
+
+	/* call the server specific accept code */
+	stream_socket->ops->accept_connection(srv_conn);
+}
+
+
+/*
+  called when someone opens a connection to one of our listening ports
+*/
+static void stream_accept_handler(struct event_context *ev, struct fd_event *fde, 
+				  struct timeval t, uint16_t flags)
+{
+	struct stream_socket *stream_socket = talloc_get_type(fde->private, struct stream_socket);
+
+	/* ask the process model to create us a process for this new
+	   connection.  When done, it calls stream_new_connection()
+	   with the newly created socket */
+	stream_socket->model_ops->accept_connection(ev, stream_socket->sock, 
+						    stream_new_connection, stream_socket);
+}
+
+
+
+/*
+  setup a listen stream socket
+  if you pass *port == 0, then a port > 1024 is used
+ */
+NTSTATUS stream_setup_socket(struct event_context *event_context,
+			     const struct model_ops *model_ops,
+			     const struct stream_server_ops *stream_ops,
+			     const char *family,
+			     const char *sock_addr,
+			     uint16_t *port,
+			     void *private)
+{
+	NTSTATUS status;
+	struct stream_socket *stream_socket;
+	struct fd_event fde;
+	int i;
+
+	stream_socket = talloc_zero(event_context, struct stream_socket);
+	NT_STATUS_HAVE_NO_MEMORY(stream_socket);
+
+	status = socket_create(family, SOCKET_TYPE_STREAM, &stream_socket->sock, 0);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	talloc_steal(stream_socket, stream_socket->sock);
+
+	/* ready to listen */
+	status = socket_set_option(stream_socket->sock, "SO_KEEPALIVE SO_REUSEADDR=1", NULL);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	status = socket_set_option(stream_socket->sock, lp_socket_options(), NULL);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	/* TODO: set socket ACL's here when they're implemented */
+
+	if (*port == 0) {
+		for (i=SERVER_TCP_LOW_PORT;i<= SERVER_TCP_HIGH_PORT;i++) {
+			status = socket_listen(stream_socket->sock, sock_addr, i, 
+					       SERVER_LISTEN_BACKLOG, 0);
+			if (NT_STATUS_IS_OK(status)) {
+				*port = i;
+				break;
+			}
+		}
+	} else {
+		status = socket_listen(stream_socket->sock, sock_addr, *port, SERVER_LISTEN_BACKLOG, 0);
+	}
+
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("Failed to listen on %s:%u - %s\n",
+			sock_addr, *port, nt_errstr(status)));
+		talloc_free(stream_socket);
+		return status;
+	}
+
+	/* we are only interested in read events on the listen socket */
+	fde.fd          = socket_get_fd(stream_socket->sock);
+	fde.flags       = EVENT_FD_READ;
+	fde.private     = stream_socket;
+	fde.handler     = stream_accept_handler;
+
+	event_add_fd(event_context, &fde, stream_socket->sock);
+
+	stream_socket->private          = talloc_reference(stream_socket, private);
+	stream_socket->ops              = stream_ops;
+	stream_socket->event_ctx	= event_context;
+	stream_socket->model_ops        = model_ops;
+
+	return NT_STATUS_OK;
+}
diff --git a/source4/smbd/service_stream.h b/source4/smbd/service_stream.h
new file mode 100644
index 0000000000..b9d4d4cc77
--- /dev/null
+++ b/source4/smbd/service_stream.h
@@ -0,0 +1,57 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   structures specific to stream servers
+
+   Copyright (C) Stefan (metze) Metzmacher	2004
+   Copyright (C) Andrew Tridgell        	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.
+*/
+
+/* modules can use the following to determine if the interface has changed
+ * please increment the version number after each interface change
+ * with a comment and maybe update struct process_model_critical_sizes.
+ */
+/* version 1 - initial version - metze */
+#define SERVER_SERVICE_VERSION 1
+
+/*
+  top level context for an established stream connection
+*/
+struct stream_connection {
+	const struct stream_server_ops *ops;
+	const struct model_ops *model_ops;
+	uint32_t server_id;
+	void *private;
+
+	struct {
+		struct event_context *ctx;
+		struct fd_event *fde;
+	} event;
+
+	struct socket_context *socket;
+	struct messaging_context *msg_ctx;
+};
+
+
+/* operations passed to the service_stream code */
+struct stream_server_ops {
+	/* the name of the server_service */
+	const char *name;
+	void (*accept_connection)(struct stream_connection *);
+	void (*recv_handler)(struct stream_connection *, struct timeval, uint16_t);
+	void (*send_handler)(struct stream_connection *, struct timeval, uint16_t);
+};