2 Unix SMB/CIFS implementation.
6 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
7 Copyright (C) Andrew Tridgell 2005
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include "smbd/service_task.h"
26 #include "lib/events/events.h"
27 #include "lib/socket/socket.h"
29 #include "system/network.h"
30 #include "dlinklist.h"
31 #include "lib/messaging/irpc.h"
36 handle fd send events on a KDC socket
38 static void kdc_send_handler(struct kdc_socket *kdc_socket)
40 while (kdc_socket->send_queue) {
41 struct kdc_reply *rep = kdc_socket->send_queue;
45 status = socket_sendto(kdc_socket->sock, &rep->packet, &sendlen, 0,
46 rep->dest_address, rep->dest_port);
47 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
51 DLIST_REMOVE(kdc_socket->send_queue, rep);
55 if (kdc_socket->send_queue == NULL) {
56 EVENT_FD_NOT_WRITEABLE(kdc_socket->fde);
62 handle fd recv events on a KDC socket
64 static void kdc_recv_handler(struct kdc_socket *kdc_socket)
67 TALLOC_CTX *tmp_ctx = talloc_new(kdc_socket);
69 struct kdc_reply *rep;
74 struct sockaddr_in src_sock_addr;
75 struct ipv4_addr addr;
78 status = socket_pending(kdc_socket->sock, &dsize);
79 if (!NT_STATUS_IS_OK(status)) {
84 blob = data_blob_talloc(kdc_socket, NULL, dsize);
85 if (blob.data == NULL) {
86 /* hope this is a temporary low memory condition */
91 status = socket_recvfrom(kdc_socket->sock, blob.data, blob.length, &nread, 0,
92 &src_addr, &src_port);
93 if (!NT_STATUS_IS_OK(status)) {
97 talloc_steal(tmp_ctx, src_addr);
100 DEBUG(2,("Received krb5 packet of length %d from %s:%d\n",
101 (int)blob.length, src_addr, src_port));
103 /* TODO: This really should be in a utility function somewhere */
104 ZERO_STRUCT(src_sock_addr);
105 #ifdef HAVE_SOCK_SIN_LEN
106 src_sock_addr.sin_len = sizeof(src_sock_addr);
108 addr = interpret_addr2(src_addr);
109 src_sock_addr.sin_addr.s_addr = addr.addr;
110 src_sock_addr.sin_port = htons(src_port);
111 src_sock_addr.sin_family = PF_INET;
114 ret = krb5_kdc_process_krb5_request(kdc_socket->kdc->smb_krb5_context->krb5_context,
115 kdc_socket->kdc->config,
116 blob.data, blob.length,
119 (struct sockaddr *)&src_sock_addr);
121 talloc_free(tmp_ctx);
125 /* queue a pending reply */
126 rep = talloc(kdc_socket, struct kdc_reply);
128 krb5_data_free(&reply);
129 talloc_free(tmp_ctx);
132 rep->dest_address = talloc_steal(rep, src_addr);
133 rep->dest_port = src_port;
134 rep->packet = data_blob_talloc(rep, reply.data, reply.length);
135 krb5_data_free(&reply);
137 if (rep->packet.data == NULL) {
139 talloc_free(tmp_ctx);
143 DLIST_ADD_END(kdc_socket->send_queue, rep, struct kdc_reply *);
144 EVENT_FD_WRITEABLE(kdc_socket->fde);
145 talloc_free(tmp_ctx);
149 handle fd events on a KDC socket
151 static void kdc_socket_handler(struct event_context *ev, struct fd_event *fde,
152 uint16_t flags, void *private)
154 struct kdc_socket *kdc_socket = talloc_get_type(private, struct kdc_socket);
155 if (flags & EVENT_FD_WRITE) {
156 kdc_send_handler(kdc_socket);
158 if (flags & EVENT_FD_READ) {
159 kdc_recv_handler(kdc_socket);
165 start listening on the given address
167 static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address)
169 struct kdc_socket *kdc_socket;
172 kdc_socket = talloc(kdc, struct kdc_socket);
173 NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
175 status = socket_create("ip", SOCKET_TYPE_DGRAM, &kdc_socket->sock, 0);
176 if (!NT_STATUS_IS_OK(status)) {
177 talloc_free(kdc_socket);
181 kdc_socket->kdc = kdc;
182 kdc_socket->send_queue = NULL;
184 talloc_steal(kdc_socket, kdc_socket->sock);
186 kdc_socket->fde = event_add_fd(kdc->task->event_ctx, kdc,
187 socket_get_fd(kdc_socket->sock), EVENT_FD_READ,
188 kdc_socket_handler, kdc_socket);
190 status = socket_listen(kdc_socket->sock, address, lp_krb5_port(), 0, 0);
191 if (!NT_STATUS_IS_OK(status)) {
192 DEBUG(0,("Failed to bind to %s:%d - %s\n",
193 address, lp_krb5_port(), nt_errstr(status)));
194 talloc_free(kdc_socket);
203 setup our listening sockets on the configured network interfaces
205 NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc)
207 int num_interfaces = iface_count();
208 TALLOC_CTX *tmp_ctx = talloc_new(kdc);
211 /* if we are allowing incoming packets from any address, then
212 we need to bind to the wildcard address */
213 if (!lp_bind_interfaces_only()) {
214 status = kdc_add_socket(kdc, "0.0.0.0");
215 NT_STATUS_NOT_OK_RETURN(status);
219 for (i=0; i<num_interfaces; i++) {
220 const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
221 status = kdc_add_socket(kdc, address);
222 NT_STATUS_NOT_OK_RETURN(status);
226 talloc_free(tmp_ctx);
234 static void kdc_task_init(struct task_server *task)
236 struct kdc_server *kdc;
240 if (iface_count() == 0) {
241 task_server_terminate(task, "kdc: no network interfaces configured");
245 kdc = talloc(task, struct kdc_server);
247 task_server_terminate(task, "kdc: out of memory");
253 /* Setup the KDC configuration */
254 kdc->config = talloc(kdc, krb5_kdc_configuration);
256 task_server_terminate(task, "kdc: out of memory");
259 krb5_kdc_default_config(kdc->config);
261 /* NAT and the like make this pointless, and painful */
262 kdc->config->check_ticket_addresses = FALSE;
264 initialize_krb5_error_table();
266 ret = smb_krb5_init_context(kdc, &kdc->smb_krb5_context);
268 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
269 error_message(ret)));
270 task_server_terminate(task, "kdc: krb5_init_context failed");
274 kdc->config->logf = kdc->smb_krb5_context->logf;
275 kdc->config->db = talloc(kdc->config, struct HDB *);
276 if (!kdc->config->db) {
277 task_server_terminate(task, "kdc: out of memory");
280 kdc->config->num_db = 1;
282 ret = hdb_ldb_create(kdc, kdc->smb_krb5_context->krb5_context,
283 &kdc->config->db[0], lp_sam_url());
285 DEBUG(1, ("kdc_task_init: hdb_ldb_create fails: %s\n",
286 smb_get_krb5_error_message(kdc->smb_krb5_context->krb5_context, ret, kdc)));
287 task_server_terminate(task, "kdc: hdb_ldb_create failed");
291 /* start listening on the configured network interfaces */
292 status = kdc_startup_interfaces(kdc);
293 if (!NT_STATUS_IS_OK(status)) {
294 task_server_terminate(task, "kdc failed to setup interfaces");
298 irpc_add_name(task->msg_ctx, "kdc_server");
303 called on startup of the KDC service
305 static NTSTATUS kdc_init(struct event_context *event_ctx,
306 const struct model_ops *model_ops)
308 return task_server_startup(event_ctx, model_ops, kdc_task_init);
311 /* called at smbd startup - register ourselves as a server service */
312 NTSTATUS server_service_kdc_init(void)
314 return register_server_service("kdc", kdc_init);