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/*
Unix SMB/CIFS implementation.
process incoming connections and fork a samba3 in inetd mode
Copyright (C) Stefan Metzmacher 2008
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 "smbd/service.h"
#include "libcli/smb2/smb2.h"
#include "system/network.h"
#include "lib/socket/netif.h"
#include "param/param.h"
#include "dynconfig/dynconfig.h"
#include "smbd/process_model.h"
/*
initialise a server_context from a open socket and register a event handler
for reading from that socket
*/
static void samba3_smb_accept(struct stream_connection *conn)
{
int i;
int fd = socket_get_fd(conn->socket);
const char *prog;
char *argv[2];
char *reason;
close(0);
close(1);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
for (i=3;i<256;i++) {
close(i);
}
prog = lpcfg_parm_string(conn->lp_ctx, NULL, "samba3", "smbd");
if (prog == NULL) {
argv[0] = talloc_asprintf(conn, "%s/%s", dyn_BINDIR, "smbd3");
}
else {
argv[0] = talloc_strdup(conn, prog);
}
if (argv[0] == NULL) {
stream_terminate_connection(conn, "out of memory");
return;
}
argv[1] = NULL;
execv(argv[0], argv);
/*
* Should never get here
*/
reason = talloc_asprintf(conn, "Could not execute %s", argv[0]);
if (reason == NULL) {
stream_terminate_connection(conn, "out of memory");
return;
}
stream_terminate_connection(conn, reason);
talloc_free(reason);
}
static const struct stream_server_ops samba3_smb_stream_ops = {
.name = "samba3",
.accept_connection = samba3_smb_accept,
};
/*
setup a listening socket on all the SMB ports for a particular address
*/
static NTSTATUS samba3_add_socket(struct task_server *task,
struct tevent_context *event_context,
struct loadparm_context *lp_ctx,
const struct model_ops *model_ops,
const char *address)
{
const char **ports = lpcfg_smb_ports(lp_ctx);
int i;
NTSTATUS status;
for (i=0;ports[i];i++) {
uint16_t port = atoi(ports[i]);
if (port == 0) continue;
status = stream_setup_socket(task, event_context, lp_ctx,
model_ops, &samba3_smb_stream_ops,
"ip", address, &port,
lpcfg_socket_options(lp_ctx),
NULL);
NT_STATUS_NOT_OK_RETURN(status);
}
return NT_STATUS_OK;
}
/*
open the smb server sockets
*/
static void samba3_smb_task_init(struct task_server *task)
{
NTSTATUS status;
const struct model_ops *model_ops;
model_ops = process_model_startup("standard");
if (model_ops == NULL) {
goto failed;
}
task_server_set_title(task, "task[samba3_smb]");
if (lpcfg_interfaces(task->lp_ctx)
&& lpcfg_bind_interfaces_only(task->lp_ctx)) {
int num_interfaces;
int i;
struct interface *ifaces;
load_interfaces(task, lpcfg_interfaces(task->lp_ctx), &ifaces);
num_interfaces = iface_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++) {
const char *address = iface_n_ip(ifaces, i);
status = samba3_add_socket(task,
task->event_ctx,
task->lp_ctx,
model_ops, address);
if (!NT_STATUS_IS_OK(status)) goto failed;
}
} else {
/* Just bind to lpcfg_socket_address() (usually 0.0.0.0) */
status = samba3_add_socket(task,
task->event_ctx, task->lp_ctx,
model_ops,
lpcfg_socket_address(task->lp_ctx));
if (!NT_STATUS_IS_OK(status)) goto failed;
}
return;
failed:
task_server_terminate(task, "Failed to startup samba3 smb task", true);
}
/* called at smbd startup - register ourselves as a server service */
NTSTATUS server_service_samba3_smb_init(void)
{
return register_server_service("samba3_smb", samba3_smb_task_init);
}
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