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;
74 status = socket_pending(kdc_socket->sock, &dsize);
75 if (!NT_STATUS_IS_OK(status)) {
80 blob = data_blob_talloc(kdc_socket, NULL, dsize);
81 if (blob.data == NULL) {
82 /* hope this is a temporary low memory condition */
87 status = socket_recvfrom(kdc_socket->sock, blob.data, blob.length, &nread, 0,
88 &src_addr, &src_port);
89 if (!NT_STATUS_IS_OK(status)) {
93 talloc_steal(tmp_ctx, src_addr);
96 DEBUG(2,("Received krb5 packet of length %d from %s:%d\n",
97 blob.length, src_addr, src_port));
99 /* TODO: This really should be in a utility function somewhere */
100 ZERO_STRUCT(src_sock_addr);
101 #ifdef HAVE_SOCK_SIN_LEN
102 src_sock_addr.sin_len = sizeof(src_sock_addr);
104 addr = interpret_addr2(src_addr);
105 src_sock_addr.sin_addr.s_addr = addr.addr;
106 src_sock_addr.sin_port = htons(src_port);
107 src_sock_addr.sin_family = PF_INET;
110 if (krb5_kdc_process_krb5_request(kdc_socket->kdc->krb5_context,
111 kdc_socket->kdc->config,
112 blob.data, blob.length,
115 (struct sockaddr *)&src_sock_addr) == -1) {
116 talloc_free(tmp_ctx);
120 /* queue a pending reply */
121 rep = talloc(kdc_socket, struct kdc_reply);
123 talloc_free(tmp_ctx);
126 rep->dest_address = talloc_steal(rep, src_addr);
127 rep->dest_port = src_port;
128 rep->packet = data_blob_talloc(rep, reply.data, reply.length);
129 if (rep->packet.data == NULL) {
131 talloc_free(tmp_ctx);
135 DLIST_ADD_END(kdc_socket->send_queue, rep, struct kdc_reply *);
136 EVENT_FD_WRITEABLE(kdc_socket->fde);
137 talloc_free(tmp_ctx);
141 handle fd events on a KDC socket
143 static void kdc_socket_handler(struct event_context *ev, struct fd_event *fde,
144 uint16_t flags, void *private)
146 struct kdc_socket *kdc_socket = talloc_get_type(private, struct kdc_socket);
147 if (flags & EVENT_FD_WRITE) {
148 kdc_send_handler(kdc_socket);
149 } else if (flags & EVENT_FD_READ) {
150 kdc_recv_handler(kdc_socket);
156 start listening on the given address
158 static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address)
160 struct kdc_socket *kdc_socket;
163 kdc_socket = talloc(kdc, struct kdc_socket);
164 NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
166 status = socket_create("ip", SOCKET_TYPE_DGRAM, &kdc_socket->sock, 0);
167 if (!NT_STATUS_IS_OK(status)) {
168 talloc_free(kdc_socket);
172 kdc_socket->kdc = kdc;
173 kdc_socket->send_queue = NULL;
175 talloc_steal(kdc_socket, kdc_socket->sock);
177 kdc_socket->fde = event_add_fd(kdc->task->event_ctx, kdc,
178 socket_get_fd(kdc_socket->sock), EVENT_FD_READ,
179 kdc_socket_handler, kdc_socket);
181 status = socket_listen(kdc_socket->sock, address, lp_krb5_port(), 0, 0);
182 if (!NT_STATUS_IS_OK(status)) {
183 DEBUG(0,("Failed to bind to %s:%d - %s\n",
184 address, lp_krb5_port(), nt_errstr(status)));
185 talloc_free(kdc_socket);
194 setup our listening sockets on the configured network interfaces
196 NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc)
198 int num_interfaces = iface_count();
199 TALLOC_CTX *tmp_ctx = talloc_new(kdc);
202 /* if we are allowing incoming packets from any address, then
203 we need to bind to the wildcard address */
204 if (!lp_bind_interfaces_only()) {
205 status = kdc_add_socket(kdc, "0.0.0.0");
206 NT_STATUS_NOT_OK_RETURN(status);
210 for (i=0; i<num_interfaces; i++) {
211 const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
212 status = kdc_add_socket(kdc, address);
213 NT_STATUS_NOT_OK_RETURN(status);
217 talloc_free(tmp_ctx);
225 static void kdc_task_init(struct task_server *task)
227 struct kdc_server *kdc;
231 if (iface_count() == 0) {
232 task_terminate(task, "kdc: no network interfaces configured");
236 kdc = talloc(task, struct kdc_server);
238 task_terminate(task, "kdc: out of memory");
244 /* Setup the KDC configuration */
245 kdc->config = talloc(kdc, struct krb5_kdc_configuration);
247 task_terminate(task, "kdc: out of memory");
250 krb5_kdc_default_config(kdc->config);
252 initialize_krb5_error_table();
254 ret = krb5_init_context(&kdc->krb5_context);
256 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
257 error_message(ret)));
258 task_terminate(task, "kdc: krb5_init_context failed");
262 /* TODO: Fill in the hdb and logging details */
263 kdc_openlog(kdc->krb5_context, kdc->config);
265 kdc->config->db = talloc(kdc->config, struct HDB *);
266 if (!kdc->config->db) {
267 task_terminate(task, "kdc: out of memory");
270 kdc->config->num_db = 1;
272 ret = hdb_ldb_create(kdc->krb5_context, &kdc->config->db[0], lp_sam_url());
274 DEBUG(1, ("kdc_task_init: hdb_ldb_create fails: %s\n",
275 smb_get_krb5_error_message(kdc->krb5_context, ret, kdc)));
276 task_terminate(task, "kdc: hdb_ldb_create failed");
280 /* start listening on the configured network interfaces */
281 status = kdc_startup_interfaces(kdc);
282 if (!NT_STATUS_IS_OK(status)) {
283 task_terminate(task, "kdc failed to setup interfaces");
290 called on startup of the KDC service
292 static NTSTATUS kdc_init(struct event_context *event_ctx,
293 const struct model_ops *model_ops)
295 return task_server_startup(event_ctx, model_ops, kdc_task_init);
298 /* called at smbd startup - register ourselves as a server service */
299 NTSTATUS server_service_kdc_init(void)
301 return register_server_service("kdc", kdc_init);