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"
33 handle fd send events on a KDC socket
35 static void kdc_send_handler(struct kdc_socket *kdc_socket)
37 while (kdc_socket->send_queue) {
38 struct kdc_reply *rep = kdc_socket->send_queue;
42 status = socket_sendto(kdc_socket->sock, &rep->packet, &sendlen, 0,
43 rep->dest_address, rep->dest_port);
44 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
48 DLIST_REMOVE(kdc_socket->send_queue, rep);
52 if (kdc_socket->send_queue == NULL) {
53 EVENT_FD_NOT_WRITEABLE(kdc_socket->fde);
59 handle fd recv events on a KDC socket
61 static void kdc_recv_handler(struct kdc_socket *kdc_socket)
64 TALLOC_CTX *tmp_ctx = talloc_new(kdc_socket);
66 struct kdc_reply *rep;
71 struct sockaddr_in src_sock_addr;
72 struct ipv4_addr addr;
75 status = socket_pending(kdc_socket->sock, &dsize);
76 if (!NT_STATUS_IS_OK(status)) {
81 blob = data_blob_talloc(kdc_socket, NULL, dsize);
82 if (blob.data == NULL) {
83 /* hope this is a temporary low memory condition */
88 status = socket_recvfrom(kdc_socket->sock, blob.data, blob.length, &nread, 0,
89 &src_addr, &src_port);
90 if (!NT_STATUS_IS_OK(status)) {
94 talloc_steal(tmp_ctx, src_addr);
97 DEBUG(2,("Received krb5 packet of length %d from %s:%d\n",
98 blob.length, src_addr, src_port));
100 /* TODO: This really should be in a utility function somewhere */
101 ZERO_STRUCT(src_sock_addr);
102 #ifdef HAVE_SOCK_SIN_LEN
103 src_sock_addr.sin_len = sizeof(src_sock_addr);
105 addr = interpret_addr2(src_addr);
106 src_sock_addr.sin_addr.s_addr = addr.addr;
107 src_sock_addr.sin_port = htons(src_port);
108 src_sock_addr.sin_family = PF_INET;
111 ret = krb5_kdc_process_krb5_request(kdc_socket->kdc->smb_krb5_context->krb5_context,
112 kdc_socket->kdc->config,
113 blob.data, blob.length,
116 (struct sockaddr *)&src_sock_addr);
118 talloc_free(tmp_ctx);
122 /* queue a pending reply */
123 rep = talloc(kdc_socket, struct kdc_reply);
125 talloc_free(tmp_ctx);
128 rep->dest_address = talloc_steal(rep, src_addr);
129 rep->dest_port = src_port;
130 rep->packet = data_blob_talloc(rep, reply.data, reply.length);
131 if (rep->packet.data == NULL) {
133 talloc_free(tmp_ctx);
137 DLIST_ADD_END(kdc_socket->send_queue, rep, struct kdc_reply *);
138 EVENT_FD_WRITEABLE(kdc_socket->fde);
139 talloc_free(tmp_ctx);
143 handle fd events on a KDC socket
145 static void kdc_socket_handler(struct event_context *ev, struct fd_event *fde,
146 uint16_t flags, void *private)
148 struct kdc_socket *kdc_socket = talloc_get_type(private, struct kdc_socket);
149 if (flags & EVENT_FD_WRITE) {
150 kdc_send_handler(kdc_socket);
151 } else if (flags & EVENT_FD_READ) {
152 kdc_recv_handler(kdc_socket);
158 start listening on the given address
160 static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address)
162 struct kdc_socket *kdc_socket;
165 kdc_socket = talloc(kdc, struct kdc_socket);
166 NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
168 status = socket_create("ip", SOCKET_TYPE_DGRAM, &kdc_socket->sock, 0);
169 if (!NT_STATUS_IS_OK(status)) {
170 talloc_free(kdc_socket);
174 kdc_socket->kdc = kdc;
175 kdc_socket->send_queue = NULL;
177 talloc_steal(kdc_socket, kdc_socket->sock);
179 kdc_socket->fde = event_add_fd(kdc->task->event_ctx, kdc,
180 socket_get_fd(kdc_socket->sock), EVENT_FD_READ,
181 kdc_socket_handler, kdc_socket);
183 status = socket_listen(kdc_socket->sock, address, lp_krb5_port(), 0, 0);
184 if (!NT_STATUS_IS_OK(status)) {
185 DEBUG(0,("Failed to bind to %s:%d - %s\n",
186 address, lp_krb5_port(), nt_errstr(status)));
187 talloc_free(kdc_socket);
196 setup our listening sockets on the configured network interfaces
198 NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc)
200 int num_interfaces = iface_count();
201 TALLOC_CTX *tmp_ctx = talloc_new(kdc);
204 /* if we are allowing incoming packets from any address, then
205 we need to bind to the wildcard address */
206 if (!lp_bind_interfaces_only()) {
207 status = kdc_add_socket(kdc, "0.0.0.0");
208 NT_STATUS_NOT_OK_RETURN(status);
212 for (i=0; i<num_interfaces; i++) {
213 const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
214 status = kdc_add_socket(kdc, address);
215 NT_STATUS_NOT_OK_RETURN(status);
219 talloc_free(tmp_ctx);
227 static void kdc_task_init(struct task_server *task)
229 struct kdc_server *kdc;
233 if (iface_count() == 0) {
234 task_terminate(task, "kdc: no network interfaces configured");
238 kdc = talloc(task, struct kdc_server);
240 task_terminate(task, "kdc: out of memory");
246 /* Setup the KDC configuration */
247 kdc->config = talloc(kdc, struct krb5_kdc_configuration);
249 task_terminate(task, "kdc: out of memory");
252 krb5_kdc_default_config(kdc->config);
254 /* NAT and the like make this pointless, and painful */
255 kdc->config->check_ticket_addresses = FALSE;
257 initialize_krb5_error_table();
259 ret = smb_krb5_init_context(kdc, &kdc->smb_krb5_context);
261 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
262 error_message(ret)));
263 task_terminate(task, "kdc: krb5_init_context failed");
267 kdc->config->logf = kdc->smb_krb5_context->logf;
268 kdc->config->db = talloc(kdc->config, struct HDB *);
269 if (!kdc->config->db) {
270 task_terminate(task, "kdc: out of memory");
273 kdc->config->num_db = 1;
275 ret = hdb_ldb_create(kdc->smb_krb5_context->krb5_context,
276 &kdc->config->db[0], lp_sam_url());
278 DEBUG(1, ("kdc_task_init: hdb_ldb_create fails: %s\n",
279 smb_get_krb5_error_message(kdc->smb_krb5_context->krb5_context, ret, kdc)));
280 task_terminate(task, "kdc: hdb_ldb_create failed");
284 /* start listening on the configured network interfaces */
285 status = kdc_startup_interfaces(kdc);
286 if (!NT_STATUS_IS_OK(status)) {
287 task_terminate(task, "kdc failed to setup interfaces");
294 called on startup of the KDC service
296 static NTSTATUS kdc_init(struct event_context *event_ctx,
297 const struct model_ops *model_ops)
299 return task_server_startup(event_ctx, model_ops, kdc_task_init);
302 /* called at smbd startup - register ourselves as a server service */
303 NTSTATUS server_service_kdc_init(void)
305 return register_server_service("kdc", kdc_init);