d75d25a7286eb92f435c13ab5b8112908bb324f8
[strongswan.git] / src / starter / starterstroke.c
1 /* Stroke for charon is the counterpart to whack from pluto
2 * Copyright (C) 2006 Martin Willi
3 * Hochschule fuer Technik Rapperswil
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * for more details.
14 *
15 * RCSID $Id$
16 */
17
18 #include <sys/types.h>
19 #include <sys/socket.h>
20 #include <sys/un.h>
21 #include <stddef.h>
22 #include <unistd.h>
23 #include <stdlib.h>
24 #include <errno.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
27
28 #include <freeswan.h>
29
30 #include <constants.h>
31 #include <defs.h>
32 #include <log.h>
33
34 #include <stroke_msg.h>
35
36 #include "starterstroke.h"
37 #include "confread.h"
38 #include "files.h"
39
40 /**
41 * Authentication mehtods, must be the same values as in charon
42 */
43 enum auth_method_t {
44 AUTH_RSA = 1,
45 AUTH_PSK = 2,
46 AUTH_DSS = 3,
47 AUTH_EAP = 201,
48 };
49
50 static char* push_string(stroke_msg_t *msg, char *string)
51 {
52 unsigned long string_start = msg->length;
53
54 if (string == NULL || msg->length + strlen(string) >= sizeof(stroke_msg_t))
55 {
56 return NULL;
57 }
58 else
59 {
60 msg->length += strlen(string) + 1;
61 strcpy((char*)msg + string_start, string);
62 return (char*)string_start;
63 }
64 }
65
66 static int send_stroke_msg (stroke_msg_t *msg)
67 {
68 struct sockaddr_un ctl_addr = { AF_UNIX, CHARON_CTL_FILE };
69 int byte_count;
70 char buffer[64];
71
72 /* starter is not called from commandline, and therefore absolutely silent */
73 msg->output_verbosity = -1;
74
75 int sock = socket(AF_UNIX, SOCK_STREAM, 0);
76
77 if (sock < 0)
78 {
79 plog("socket() failed: %s", strerror(errno));
80 return -1;
81 }
82 if (connect(sock, (struct sockaddr *)&ctl_addr, offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
83 {
84 plog("connect(charon_ctl) failed: %s", strerror(errno));
85 close(sock);
86 return -1;
87 }
88
89 /* send message */
90 if (write(sock, msg, msg->length) != msg->length)
91 {
92 plog("write(charon_ctl) failed: %s", strerror(errno));
93 close(sock);
94 return -1;
95 }
96 while ((byte_count = read(sock, buffer, sizeof(buffer)-1)) > 0)
97 {
98 buffer[byte_count] = '\0';
99 plog("%s", buffer);
100 }
101 if (byte_count < 0)
102 {
103 plog("read() failed: %s", strerror(errno));
104 }
105
106 close(sock);
107 return 0;
108 }
109
110 static char* connection_name(starter_conn_t *conn)
111 {
112 /* if connection name is '%auto', create a new name like conn_xxxxx */
113 static char buf[32];
114
115 if (streq(conn->name, "%auto"))
116 {
117 sprintf(buf, "conn_%ld", conn->id);
118 return buf;
119 }
120 return conn->name;
121 }
122
123 static void ip_address2string(ip_address *addr, char *buffer, size_t len)
124 {
125 switch (((struct sockaddr*)addr)->sa_family)
126 {
127 case AF_INET:
128 {
129 struct sockaddr_in* sin = (struct sockaddr_in*)addr;
130 if (inet_ntop(AF_INET, &sin->sin_addr, buffer, len))
131 {
132 return;
133 }
134 break;
135 }
136 case AF_INET6:
137 {
138 struct sockaddr_in6* sin6 = (struct sockaddr_in6*)addr;
139 if (inet_ntop(AF_INET6, &sin6->sin6_addr, buffer, len))
140 {
141 return;
142 }
143 break;
144 }
145 default:
146 break;
147 }
148 /* failed */
149 snprintf(buffer, len, "0.0.0.0");
150 }
151
152
153 static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
154 {
155 char buffer[INET6_ADDRSTRLEN];
156
157 msg_end->id = push_string(msg, conn_end->id);
158 msg_end->cert = push_string(msg, conn_end->cert);
159 msg_end->ca = push_string(msg, conn_end->ca);
160 msg_end->groups = push_string(msg, conn_end->groups);
161 msg_end->updown = push_string(msg, conn_end->updown);
162 ip_address2string(&conn_end->addr, buffer, sizeof(buffer));
163 msg_end->address = push_string(msg, buffer);
164 ip_address2string(&conn_end->subnet.addr, buffer, sizeof(buffer));
165 msg_end->subnet = push_string(msg, buffer);
166 msg_end->subnet_mask = conn_end->subnet.maskbits;
167 msg_end->sendcert = conn_end->sendcert;
168 msg_end->hostaccess = conn_end->hostaccess;
169 msg_end->tohost = !conn_end->has_client;
170 msg_end->protocol = conn_end->protocol;
171 msg_end->port = conn_end->port;
172 if (conn_end->srcip)
173 {
174 if (conn_end->srcip[0] == '%')
175 { /* %poolname, strip % */
176 msg_end->sourceip_size = 0;
177 msg_end->sourceip = push_string(msg, conn_end->srcip + 1);
178 }
179 else
180 {
181 char *pos = strchr(conn_end->srcip, '/');
182 if (pos)
183 { /* CIDR subnet definition */
184 snprintf(buffer, pos - conn_end->srcip + 1, "%s", conn_end->srcip);
185 msg_end->sourceip = push_string(msg, buffer);
186 msg_end->sourceip_size = atoi(pos + 1);
187 }
188 else
189 { /* a sigle address */
190 msg_end->sourceip = push_string(msg, conn_end->srcip);
191 if (strchr(conn_end->srcip, ':'))
192 { /* IPv6 */
193 msg_end->sourceip_size = 128;
194 }
195 else
196 { /* IPv4 */
197 msg_end->sourceip_size = 32;
198 }
199 }
200 }
201 }
202 else if (conn_end->modecfg)
203 {
204 msg_end->sourceip_size = 1;
205 }
206 }
207
208 int starter_stroke_add_conn(starter_config_t *cfg, starter_conn_t *conn)
209 {
210 stroke_msg_t msg;
211
212 memset(&msg, 0, sizeof(msg));
213 msg.type = STR_ADD_CONN;
214 msg.length = offsetof(stroke_msg_t, buffer);
215 msg.add_conn.ikev2 = conn->keyexchange == KEY_EXCHANGE_IKEV2;
216 msg.add_conn.name = push_string(&msg, connection_name(conn));
217
218 /* RSA is preferred before PSK and EAP */
219 if (conn->policy & POLICY_RSASIG)
220 {
221 msg.add_conn.auth_method = AUTH_RSA;
222 }
223 else if (conn->policy & POLICY_PSK)
224 {
225 msg.add_conn.auth_method = AUTH_PSK;
226 }
227 else
228 {
229 msg.add_conn.auth_method = AUTH_EAP;
230 }
231 msg.add_conn.eap_type = conn->eap_type;
232 msg.add_conn.eap_vendor = conn->eap_vendor;
233
234 if (conn->policy & POLICY_TUNNEL)
235 {
236 msg.add_conn.mode = 1; /* XFRM_MODE_TRANSPORT */
237 }
238 else if (conn->policy & POLICY_BEET)
239 {
240 msg.add_conn.mode = 4; /* XFRM_MODE_BEET */
241 }
242 else
243 {
244 msg.add_conn.mode = 0; /* XFRM_MODE_TUNNEL */
245 }
246
247 if (!(conn->policy & POLICY_DONT_REKEY))
248 {
249 msg.add_conn.rekey.reauth = (conn->policy & POLICY_DONT_REAUTH) == LEMPTY;
250 msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
251 msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
252 msg.add_conn.rekey.margin = conn->sa_rekey_margin;
253 msg.add_conn.rekey.tries = conn->sa_keying_tries;
254 msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
255 }
256 msg.add_conn.mobike = conn->policy & POLICY_MOBIKE;
257 msg.add_conn.force_encap = conn->policy & POLICY_FORCE_ENCAP;
258 msg.add_conn.crl_policy = cfg->setup.strictcrlpolicy;
259 msg.add_conn.unique = cfg->setup.uniqueids;
260 msg.add_conn.algorithms.ike = push_string(&msg, conn->ike);
261 msg.add_conn.algorithms.esp = push_string(&msg, conn->esp);
262 msg.add_conn.dpd.delay = conn->dpd_delay;
263 msg.add_conn.dpd.action = conn->dpd_action;
264 msg.add_conn.ikeme.mediation = conn->me_mediation;
265 msg.add_conn.ikeme.mediated_by = push_string(&msg, conn->me_mediated_by);
266 msg.add_conn.ikeme.peerid = push_string(&msg, conn->me_peerid);
267
268 starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->left);
269 starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->right);
270
271 return send_stroke_msg(&msg);
272 }
273
274 int starter_stroke_del_conn(starter_conn_t *conn)
275 {
276 stroke_msg_t msg;
277
278 msg.type = STR_DEL_CONN;
279 msg.length = offsetof(stroke_msg_t, buffer);
280 msg.del_conn.name = push_string(&msg, connection_name(conn));
281 return send_stroke_msg(&msg);
282 }
283
284 int starter_stroke_route_conn(starter_conn_t *conn)
285 {
286 stroke_msg_t msg;
287
288 msg.type = STR_ROUTE;
289 msg.length = offsetof(stroke_msg_t, buffer);
290 msg.route.name = push_string(&msg, connection_name(conn));
291 return send_stroke_msg(&msg);
292 }
293
294 int starter_stroke_initiate_conn(starter_conn_t *conn)
295 {
296 stroke_msg_t msg;
297
298 msg.type = STR_INITIATE;
299 msg.length = offsetof(stroke_msg_t, buffer);
300 msg.initiate.name = push_string(&msg, connection_name(conn));
301 return send_stroke_msg(&msg);
302 }
303
304 int starter_stroke_add_ca(starter_ca_t *ca)
305 {
306 stroke_msg_t msg;
307
308 msg.type = STR_ADD_CA;
309 msg.length = offsetof(stroke_msg_t, buffer);
310 msg.add_ca.name = push_string(&msg, ca->name);
311 msg.add_ca.cacert = push_string(&msg, ca->cacert);
312 msg.add_ca.crluri = push_string(&msg, ca->crluri);
313 msg.add_ca.crluri2 = push_string(&msg, ca->crluri2);
314 msg.add_ca.ocspuri = push_string(&msg, ca->ocspuri);
315 msg.add_ca.ocspuri2 = push_string(&msg, ca->ocspuri2);
316 msg.add_ca.certuribase = push_string(&msg, ca->certuribase);
317 return send_stroke_msg(&msg);
318 }
319
320 int starter_stroke_del_ca(starter_ca_t *ca)
321 {
322 stroke_msg_t msg;
323
324 msg.type = STR_DEL_CA;
325 msg.length = offsetof(stroke_msg_t, buffer);
326 msg.del_ca.name = push_string(&msg, ca->name);
327 return send_stroke_msg(&msg);
328 }
329
330 int starter_stroke_configure(starter_config_t *cfg)
331 {
332 stroke_msg_t msg;
333
334 if (cfg->setup.cachecrls)
335 {
336 msg.type = STR_CONFIG;
337 msg.length = offsetof(stroke_msg_t, buffer);
338 msg.config.cachecrl = 1;
339 return send_stroke_msg(&msg);
340 }
341 return 0;
342 }
343