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r5103: forgot to add two new files
these are the stream server helper functions
(This used to be commit 3c5a7650a9)
This commit is contained in:
Andrew Tridgell
Gerald (Jerry) Carter
parent
55d4d36993
commit
597142ddd3
215
source4/smbd/service_stream.c
Normal file
215
source4/smbd/service_stream.c
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@ -0,0 +1,215 @@
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/*
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Unix SMB/CIFS implementation.
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hepler functions for stream based servers
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Copyright (C) Andrew Tridgell 2003-2005
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Copyright (C) Stefan (metze) Metzmacher 2004
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "process_model.h"
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#include "events.h"
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#include "smbd/service_stream.h"
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/* the range of ports to try for dcerpc over tcp endpoints */
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#define SERVER_TCP_LOW_PORT 1024
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#define SERVER_TCP_HIGH_PORT 1300
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/* size of listen() backlog in smbd */
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#define SERVER_LISTEN_BACKLOG 10
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/*
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private structure for a single listening stream socket
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*/
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struct stream_socket {
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const struct stream_server_ops *ops;
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struct event_context *event_ctx;
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const struct model_ops *model_ops;
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struct socket_context *sock;
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void *private;
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};
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/*
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close the socket and shutdown a stream_connection
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*/
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void stream_terminate_connection(struct stream_connection *srv_conn, const char *reason)
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{
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struct event_ctx *event_ctx = srv_conn->event.ctx;
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const struct model_ops *model_ops = srv_conn->model_ops;
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talloc_free(srv_conn);
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model_ops->terminate_connection(event_ctx, reason);
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}
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/*
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the select loop has indicated that a stream is ready for IO
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*/
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static void stream_io_handler(struct event_context *ev, struct fd_event *fde,
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struct timeval t, uint16_t flags)
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{
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struct stream_connection *conn = talloc_get_type(fde->private,
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struct stream_connection);
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if (flags & EVENT_FD_WRITE) {
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conn->ops->send_handler(conn, t, flags);
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return;
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}
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if (flags & EVENT_FD_READ) {
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conn->ops->recv_handler(conn, t, flags);
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}
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}
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/*
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called when a new socket connection has been established. This is called in the process
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context of the new process (if appropriate)
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*/
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static void stream_new_connection(struct event_context *ev,
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struct socket_context *sock,
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uint32_t server_id, void *private)
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{
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struct stream_socket *stream_socket = talloc_get_type(private, struct stream_socket);
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struct fd_event fde;
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struct stream_connection *srv_conn;
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srv_conn = talloc_zero(ev, struct stream_connection);
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if (!srv_conn) {
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DEBUG(0,("talloc(mem_ctx, struct stream_connection) failed\n"));
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return;
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}
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talloc_steal(srv_conn, sock);
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fde.private = srv_conn;
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fde.fd = socket_get_fd(sock);
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fde.flags = EVENT_FD_READ;
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fde.handler = stream_io_handler;
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srv_conn->private = stream_socket->private;
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srv_conn->model_ops = stream_socket->model_ops;
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srv_conn->event.ctx = ev;
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srv_conn->event.fde = &fde;
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srv_conn->socket = sock;
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srv_conn->server_id = server_id;
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srv_conn->ops = stream_socket->ops;
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srv_conn->event.fde = event_add_fd(ev, &fde, srv_conn);
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if (!socket_check_access(sock, "smbd", lp_hostsallow(-1), lp_hostsdeny(-1))) {
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stream_terminate_connection(srv_conn, "denied by access rules");
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return;
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}
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/* setup to receive internal messages on this connection */
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srv_conn->msg_ctx = messaging_init(srv_conn, srv_conn->server_id, ev);
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if (!srv_conn->msg_ctx) {
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stream_terminate_connection(srv_conn, "messaging_init() failed");
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return;
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}
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/* call the server specific accept code */
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stream_socket->ops->accept_connection(srv_conn);
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}
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/*
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called when someone opens a connection to one of our listening ports
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*/
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static void stream_accept_handler(struct event_context *ev, struct fd_event *fde,
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struct timeval t, uint16_t flags)
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{
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struct stream_socket *stream_socket = talloc_get_type(fde->private, struct stream_socket);
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/* ask the process model to create us a process for this new
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connection. When done, it calls stream_new_connection()
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with the newly created socket */
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stream_socket->model_ops->accept_connection(ev, stream_socket->sock,
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stream_new_connection, stream_socket);
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}
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/*
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setup a listen stream socket
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if you pass *port == 0, then a port > 1024 is used
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*/
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NTSTATUS stream_setup_socket(struct event_context *event_context,
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const struct model_ops *model_ops,
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const struct stream_server_ops *stream_ops,
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const char *family,
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const char *sock_addr,
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uint16_t *port,
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void *private)
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{
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NTSTATUS status;
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struct stream_socket *stream_socket;
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struct fd_event fde;
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int i;
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stream_socket = talloc_zero(event_context, struct stream_socket);
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NT_STATUS_HAVE_NO_MEMORY(stream_socket);
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status = socket_create(family, SOCKET_TYPE_STREAM, &stream_socket->sock, 0);
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NT_STATUS_NOT_OK_RETURN(status);
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talloc_steal(stream_socket, stream_socket->sock);
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/* ready to listen */
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status = socket_set_option(stream_socket->sock, "SO_KEEPALIVE SO_REUSEADDR=1", NULL);
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NT_STATUS_NOT_OK_RETURN(status);
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status = socket_set_option(stream_socket->sock, lp_socket_options(), NULL);
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NT_STATUS_NOT_OK_RETURN(status);
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/* TODO: set socket ACL's here when they're implemented */
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if (*port == 0) {
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for (i=SERVER_TCP_LOW_PORT;i<= SERVER_TCP_HIGH_PORT;i++) {
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status = socket_listen(stream_socket->sock, sock_addr, i,
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SERVER_LISTEN_BACKLOG, 0);
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if (NT_STATUS_IS_OK(status)) {
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*port = i;
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break;
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}
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}
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} else {
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status = socket_listen(stream_socket->sock, sock_addr, *port, SERVER_LISTEN_BACKLOG, 0);
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}
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0,("Failed to listen on %s:%u - %s\n",
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sock_addr, *port, nt_errstr(status)));
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talloc_free(stream_socket);
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return status;
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}
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/* we are only interested in read events on the listen socket */
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fde.fd = socket_get_fd(stream_socket->sock);
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fde.flags = EVENT_FD_READ;
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fde.private = stream_socket;
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fde.handler = stream_accept_handler;
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event_add_fd(event_context, &fde, stream_socket->sock);
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stream_socket->private = talloc_reference(stream_socket, private);
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stream_socket->ops = stream_ops;
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stream_socket->event_ctx = event_context;
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stream_socket->model_ops = model_ops;
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return NT_STATUS_OK;
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}
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57
source4/smbd/service_stream.h
Normal file
57
source4/smbd/service_stream.h
Normal file
@ -0,0 +1,57 @@
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/*
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Unix SMB/CIFS implementation.
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structures specific to stream servers
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Copyright (C) Stefan (metze) Metzmacher 2004
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Copyright (C) Andrew Tridgell 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* modules can use the following to determine if the interface has changed
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* please increment the version number after each interface change
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* with a comment and maybe update struct process_model_critical_sizes.
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*/
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/* version 1 - initial version - metze */
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#define SERVER_SERVICE_VERSION 1
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/*
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top level context for an established stream connection
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*/
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struct stream_connection {
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const struct stream_server_ops *ops;
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const struct model_ops *model_ops;
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uint32_t server_id;
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void *private;
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struct {
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struct event_context *ctx;
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struct fd_event *fde;
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} event;
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struct socket_context *socket;
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struct messaging_context *msg_ctx;
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};
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/* operations passed to the service_stream code */
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struct stream_server_ops {
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/* the name of the server_service */
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const char *name;
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void (*accept_connection)(struct stream_connection *);
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void (*recv_handler)(struct stream_connection *, struct timeval, uint16_t);
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void (*send_handler)(struct stream_connection *, struct timeval, uint16_t);
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};
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