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/*
Unix SMB/CIFS implementation.
process model: standard (1 process per client connection)
Copyright (C) Andrew Tridgell 1992-2003
Copyright (C) James J Myers 2003 <myersjj@samba.org>
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"
/*
called when the process model is selected
*/
static void standard_model_startup(void)
{
signal(SIGCHLD, SIG_IGN);
smbd_process_init();
}
/*
called when a listening socket becomes readable
*/
static void standard_accept_connection(struct event_context *ev, struct fd_event *srv_fde, time_t t, uint16_t flags)
{
int accepted_fd;
struct sockaddr addr;
socklen_t in_addrlen = sizeof(addr);
pid_t pid;
struct fd_event fde;
struct timed_event idle;
struct server_socket *server_socket = srv_fde->private;
struct server_connection *conn;
TALLOC_CTX *mem_ctx;
/* accept an incoming connection. */
accepted_fd = accept(srv_fde->fd,&addr,&in_addrlen);
if (accepted_fd == -1) {
DEBUG(0,("standard_accept_connection: accept: %s\n",
strerror(errno)));
return;
}
pid = fork();
if (pid != 0) {
/* parent or error code ... */
close(accepted_fd);
/* go back to the event loop */
return;
}
/* Child code ... */
/* close all the listening sockets */
event_remove_fd_all_handler(ev, standard_accept_connection);
/* tdb needs special fork handling */
if (tdb_reopen_all() == -1) {
DEBUG(0,("standard_accept_connection: tdb_reopen_all failed.\n"));
}
mem_ctx = talloc_init("server_service_connection");
if (!mem_ctx) {
DEBUG(0,("talloc_init(server_service_connection) failed\n"));
return;
}
conn = talloc_p(mem_ctx, struct server_connection);
if (!conn) {
DEBUG(0,("talloc_p(mem_ctx, struct server_service_connection) failed\n"));
talloc_destroy(mem_ctx);
return;
}
ZERO_STRUCTP(conn);
conn->mem_ctx = mem_ctx;
fde.private = conn;
fde.fd = accepted_fd;
fde.flags = EVENT_FD_READ;
fde.handler = server_io_handler;
idle.private = conn;
idle.next_event = t + 300;
idle.handler = server_idle_handler;
conn->event.ctx = ev;
conn->event.fde = &fde;
conn->event.idle = &idle;
conn->event.idle_time = 300;
conn->server_socket = server_socket;
conn->service = server_socket->service;
/* TODO: we need a generic socket subsystem */
conn->socket = talloc_p(conn->mem_ctx, struct socket_context);
if (!conn->socket) {
DEBUG(0,("talloc_p(conn->mem_ctx, struct socket_context) failed\n"));
talloc_destroy(mem_ctx);
return;
}
conn->socket->private_data = NULL;
conn->socket->ops = NULL;
conn->socket->client_addr = NULL;
conn->socket->pkt_count = 0;
conn->socket->fde = conn->event.fde;
/* create a smb server context and add it to out event
handling */
server_socket->service->ops->accept_connection(conn);
/* accpect_connection() of the service may changed idle.next_event */
conn->event.fde = event_add_fd(ev,&fde);
conn->event.idle = event_add_timed(ev,&idle);
conn->socket->fde = conn->event.fde;
DLIST_ADD(server_socket->connection_list,conn);
/* return to the event loop */
}
/* called when a SMB connection goes down */
static void standard_terminate_connection(struct server_connection *conn, const char *reason)
{
DEBUG(0,("single_terminate_connection: reason[%s]\n",reason));
conn->service->ops->close_connection(conn,reason);
/* terminate this process */
exit(0);
}
static int standard_get_id(struct smbsrv_request *req)
{
return (int)req->smb_conn->pid;
}
static void standard_exit_server(struct server_context *srv_ctx, const char *reason)
{
DEBUG(1,("standard_exit_server: reason[%s]\n",reason));
}
/*
initialise the standard process model, registering ourselves with the process model subsystem
*/
NTSTATUS process_model_standard_init(void)
{
NTSTATUS ret;
struct model_ops ops;
ZERO_STRUCT(ops);
/* fill in our name */
ops.name = "standard";
/* fill in all the operations */
ops.model_startup = standard_model_startup;
ops.accept_connection = standard_accept_connection;
ops.terminate_connection = standard_terminate_connection;
ops.exit_server = standard_exit_server;
ops.get_id = standard_get_id;
/* register ourselves with the PROCESS_MODEL subsystem. */
ret = register_backend("process_model", &ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register process_model 'standard'!\n"));
return ret;
}
return ret;
}
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