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/*
Unix SMB/CIFS implementation.
KDC Server startup
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
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.
*/
#include "includes.h"
#include "smbd/service_task.h"
#include "lib/events/events.h"
#include "lib/socket/socket.h"
#include "kdc/kdc.h"
/*
handle fd events on a cldap_socket
*/
static void kdc_socket_handler(struct event_context *ev, struct fd_event *fde,
uint16_t flags, void *private)
{
NTSTATUS status;
struct kdc_socket *kdc_socket = talloc_get_type(private, struct kdc_socket);
if (flags & EVENT_FD_WRITE) {
/* this should not happen */
} else if (flags & EVENT_FD_READ) {
TALLOC_CTX *tmp_ctx = talloc_new(kdc_socket);
DATA_BLOB blob = data_blob_talloc(tmp_ctx, NULL, 64 * 1024);
size_t nread;
const char *src_addr;
int src_port;
DEBUG(0, ("incoming!\n"));
status = socket_recvfrom(kdc_socket->sock, blob.data, blob.length, &nread, 0,
&src_addr, &src_port);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(tmp_ctx);
return;
}
talloc_steal(tmp_ctx, src_addr);
blob.length = nread;
DEBUG(2,("Received krb5 packet of length %d from %s:%d\n",
blob.length, src_addr, src_port));
}
}
/*
start listening on the given address
*/
static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address)
{
struct kdc_socket *kdc_socket;
NTSTATUS status;
kdc_socket = talloc(kdc, struct kdc_socket);
NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
status = socket_create("ip", SOCKET_TYPE_DGRAM, &kdc_socket->sock, 0);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(kdc_socket);
return status;
}
kdc_socket->kdc = kdc;
talloc_steal(kdc_socket, kdc_socket->sock);
kdc_socket->fde = event_add_fd(kdc->task->event_ctx, kdc,
socket_get_fd(kdc_socket->sock), 0,
kdc_socket_handler, kdc_socket);
status = socket_listen(kdc_socket->sock, address, lp_krb5_port(), 0, 0);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Failed to bind to %s:%d - %s\n",
address, lp_krb5_port(), nt_errstr(status)));
talloc_free(kdc_socket);
return status;
}
return NT_STATUS_OK;
}
/*
setup our listening sockets on the configured network interfaces
*/
NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc)
{
int num_interfaces = iface_count();
TALLOC_CTX *tmp_ctx = talloc_new(kdc);
NTSTATUS status;
/* if we are allowing incoming packets from any address, then
we need to bind to the wildcard address */
if (!lp_bind_interfaces_only()) {
status = kdc_add_socket(kdc, "0.0.0.0");
NT_STATUS_NOT_OK_RETURN(status);
} else {
int i;
for (i=0; i<num_interfaces; i++) {
const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
status = kdc_add_socket(kdc, address);
NT_STATUS_NOT_OK_RETURN(status);
}
}
talloc_free(tmp_ctx);
return NT_STATUS_OK;
}
/*
startup the kdc task
*/
static void kdc_task_init(struct task_server *task)
{
struct kdc_server *kdc;
NTSTATUS status;
if (iface_count() == 0) {
task_terminate(task, "kdc: no network interfaces configured");
return;
}
kdc = talloc(task, struct kdc_server);
if (kdc == NULL) {
task_terminate(task, "kdc: out of memory");
return;
}
kdc->task = task;
/* Setup the KDC configuration */
kdc->config = talloc(kdc, struct krb5_kdc_configuration);
if (!kdc->config) {
task_terminate(task, "kdc: out of memory");
return;
}
krb5_kdc_default_config(kdc->config);
/* TODO: Fill in the hdb and logging details */
/* start listening on the configured network interfaces */
status = kdc_startup_interfaces(kdc);
if (!NT_STATUS_IS_OK(status)) {
task_terminate(task, "kdc failed to setup interfaces");
return;
}
DEBUG(0, ("When I grow up, I want to be a KDC!\n"));
}
/*
called on startup of the KDC service
*/
static NTSTATUS kdc_init(struct event_context *event_ctx,
const struct model_ops *model_ops)
{
return task_server_startup(event_ctx, model_ops, kdc_task_init);
}
/* called at smbd startup - register ourselves as a server service */
NTSTATUS server_service_kdc_init(void)
{
return register_server_service("kdc", kdc_init);
}
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