Added a "aggressive" ipsec.conf connection option
[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
16 #include <sys/types.h>
17 #include <sys/socket.h>
18 #include <sys/un.h>
19 #include <stddef.h>
20 #include <unistd.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <errno.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26
27 #include <credentials/auth_cfg.h>
28
29 #include <freeswan.h>
30
31 #include <constants.h>
32 #include <defs.h>
33 #include <log.h>
34
35 #include <stroke_msg.h>
36
37 #include "starterstroke.h"
38 #include "confread.h"
39 #include "files.h"
40
41 #define IPV4_LEN 4
42 #define IPV6_LEN 16
43
44 static char* push_string(stroke_msg_t *msg, char *string)
45 {
46 unsigned long string_start = msg->length;
47
48 if (string == NULL || msg->length + strlen(string) >= sizeof(stroke_msg_t))
49 {
50 return NULL;
51 }
52 else
53 {
54 msg->length += strlen(string) + 1;
55 strcpy((char*)msg + string_start, string);
56 return (char*)string_start;
57 }
58 }
59
60 static int send_stroke_msg (stroke_msg_t *msg)
61 {
62 struct sockaddr_un ctl_addr;
63 int byte_count;
64 char buffer[64];
65
66 ctl_addr.sun_family = AF_UNIX;
67 strcpy(ctl_addr.sun_path, CHARON_CTL_FILE);
68
69 /* starter is not called from commandline, and therefore absolutely silent */
70 msg->output_verbosity = -1;
71
72 int sock = socket(AF_UNIX, SOCK_STREAM, 0);
73
74 if (sock < 0)
75 {
76 plog("socket() failed: %s", strerror(errno));
77 return -1;
78 }
79 if (connect(sock, (struct sockaddr *)&ctl_addr, offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
80 {
81 plog("connect(charon_ctl) failed: %s", strerror(errno));
82 close(sock);
83 return -1;
84 }
85
86 /* send message */
87 if (write(sock, msg, msg->length) != msg->length)
88 {
89 plog("write(charon_ctl) failed: %s", strerror(errno));
90 close(sock);
91 return -1;
92 }
93 while ((byte_count = read(sock, buffer, sizeof(buffer)-1)) > 0)
94 {
95 buffer[byte_count] = '\0';
96 plog("%s", buffer);
97 }
98 if (byte_count < 0)
99 {
100 plog("read() failed: %s", strerror(errno));
101 }
102
103 close(sock);
104 return 0;
105 }
106
107 static char* connection_name(starter_conn_t *conn)
108 {
109 /* if connection name is '%auto', create a new name like conn_xxxxx */
110 static char buf[32];
111
112 if (streq(conn->name, "%auto"))
113 {
114 sprintf(buf, "conn_%lu", conn->id);
115 return buf;
116 }
117 return conn->name;
118 }
119
120 static void ip_address2string(ip_address *addr, char *buffer, size_t len)
121 {
122 switch (((struct sockaddr*)addr)->sa_family)
123 {
124 case AF_INET6:
125 {
126 struct sockaddr_in6* sin6 = (struct sockaddr_in6*)addr;
127 u_int8_t zeroes[IPV6_LEN];
128
129 memset(zeroes, 0, IPV6_LEN);
130 if (memcmp(zeroes, &(sin6->sin6_addr.s6_addr), IPV6_LEN) &&
131 inet_ntop(AF_INET6, &sin6->sin6_addr, buffer, len))
132 {
133 return;
134 }
135 snprintf(buffer, len, "%%any6");
136 break;
137 }
138 case AF_INET:
139 {
140 struct sockaddr_in* sin = (struct sockaddr_in*)addr;
141 u_int8_t zeroes[IPV4_LEN];
142
143 memset(zeroes, 0, IPV4_LEN);
144 if (memcmp(zeroes, &(sin->sin_addr.s_addr), IPV4_LEN) &&
145 inet_ntop(AF_INET, &sin->sin_addr, buffer, len))
146 {
147 return;
148 }
149 /* fall through to default */
150 }
151 default:
152 snprintf(buffer, len, "%%any");
153 break;
154 }
155 }
156
157 static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
158 {
159 char buffer[INET6_ADDRSTRLEN];
160
161 msg_end->auth = push_string(msg, conn_end->auth);
162 msg_end->auth2 = push_string(msg, conn_end->auth2);
163 msg_end->id = push_string(msg, conn_end->id);
164 msg_end->id2 = push_string(msg, conn_end->id2);
165 msg_end->cert = push_string(msg, conn_end->cert);
166 msg_end->cert2 = push_string(msg, conn_end->cert2);
167 msg_end->cert_policy = push_string(msg, conn_end->cert_policy);
168 msg_end->ca = push_string(msg, conn_end->ca);
169 msg_end->ca2 = push_string(msg, conn_end->ca2);
170 msg_end->groups = push_string(msg, conn_end->groups);
171 msg_end->updown = push_string(msg, conn_end->updown);
172 if (conn_end->host)
173 {
174 msg_end->address = push_string(msg, conn_end->host);
175 }
176 else
177 {
178 ip_address2string(&conn_end->addr, buffer, sizeof(buffer));
179 msg_end->address = push_string(msg, buffer);
180 }
181 msg_end->ikeport = conn_end->ikeport;
182 msg_end->subnets = push_string(msg, conn_end->subnet);
183 msg_end->sourceip = push_string(msg, conn_end->sourceip);
184 msg_end->sourceip_mask = conn_end->sourceip_mask;
185 msg_end->sendcert = conn_end->sendcert;
186 msg_end->hostaccess = conn_end->hostaccess;
187 msg_end->tohost = !conn_end->has_client;
188 msg_end->protocol = conn_end->protocol;
189 msg_end->port = conn_end->port;
190 }
191
192 int starter_stroke_add_conn(starter_config_t *cfg, starter_conn_t *conn)
193 {
194 stroke_msg_t msg;
195
196 memset(&msg, 0, sizeof(msg));
197 msg.type = STR_ADD_CONN;
198 msg.length = offsetof(stroke_msg_t, buffer);
199 msg.add_conn.version = conn->keyexchange;
200 msg.add_conn.name = push_string(&msg, connection_name(conn));
201
202 /* PUBKEY is preferred to PSK and EAP */
203 if (conn->policy & POLICY_PUBKEY)
204 {
205 msg.add_conn.auth_method = AUTH_CLASS_PUBKEY;
206 }
207 else if (conn->policy & POLICY_PSK)
208 {
209 msg.add_conn.auth_method = AUTH_CLASS_PSK;
210 }
211 else if (conn->policy & POLICY_XAUTH_PSK)
212 {
213 msg.add_conn.auth_method = AUTH_CLASS_EAP;
214 }
215 else
216 {
217 msg.add_conn.auth_method = AUTH_CLASS_ANY;
218 }
219 msg.add_conn.eap_type = conn->eap_type;
220 msg.add_conn.eap_vendor = conn->eap_vendor;
221 msg.add_conn.eap_identity = push_string(&msg, conn->eap_identity);
222 msg.add_conn.aaa_identity = push_string(&msg, conn->aaa_identity);
223 msg.add_conn.xauth_identity = push_string(&msg, conn->xauth_identity);
224
225 if (conn->policy & POLICY_TUNNEL)
226 {
227 msg.add_conn.mode = MODE_TUNNEL;
228 }
229 else if (conn->policy & POLICY_BEET)
230 {
231 msg.add_conn.mode = MODE_BEET;
232 }
233 else if (conn->policy & POLICY_PROXY)
234 {
235 msg.add_conn.mode = MODE_TRANSPORT;
236 msg.add_conn.proxy_mode = TRUE;
237 }
238 else if (conn->policy & POLICY_SHUNT_PASS)
239 {
240 msg.add_conn.mode = MODE_PASS;
241 }
242 else if (conn->policy & (POLICY_SHUNT_DROP | POLICY_SHUNT_REJECT))
243 {
244 msg.add_conn.mode = MODE_DROP;
245 }
246 else
247 {
248 msg.add_conn.mode = MODE_TRANSPORT;
249 }
250
251 if (!(conn->policy & POLICY_DONT_REKEY))
252 {
253 msg.add_conn.rekey.reauth = (conn->policy & POLICY_DONT_REAUTH) == LEMPTY;
254 msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
255 msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
256 msg.add_conn.rekey.margin = conn->sa_rekey_margin;
257 msg.add_conn.rekey.life_bytes = conn->sa_ipsec_life_bytes;
258 msg.add_conn.rekey.margin_bytes = conn->sa_ipsec_margin_bytes;
259 msg.add_conn.rekey.life_packets = conn->sa_ipsec_life_packets;
260 msg.add_conn.rekey.margin_packets = conn->sa_ipsec_margin_packets;
261 msg.add_conn.rekey.tries = conn->sa_keying_tries;
262 msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
263 }
264 msg.add_conn.mobike = (conn->policy & POLICY_MOBIKE) != 0;
265 msg.add_conn.force_encap = (conn->policy & POLICY_FORCE_ENCAP) != 0;
266 msg.add_conn.ipcomp = (conn->policy & POLICY_COMPRESS) != 0;
267 msg.add_conn.install_policy = conn->install_policy;
268 msg.add_conn.aggressive = conn->aggressive;
269 msg.add_conn.crl_policy = cfg->setup.strictcrlpolicy;
270 msg.add_conn.unique = cfg->setup.uniqueids;
271 msg.add_conn.algorithms.ike = push_string(&msg, conn->ike);
272 msg.add_conn.algorithms.esp = push_string(&msg, conn->esp);
273 msg.add_conn.dpd.delay = conn->dpd_delay;
274 msg.add_conn.dpd.action = conn->dpd_action;
275 msg.add_conn.close_action = conn->close_action;
276 msg.add_conn.inactivity = conn->inactivity;
277 msg.add_conn.ikeme.mediation = conn->me_mediation;
278 msg.add_conn.ikeme.mediated_by = push_string(&msg, conn->me_mediated_by);
279 msg.add_conn.ikeme.peerid = push_string(&msg, conn->me_peerid);
280 msg.add_conn.reqid = conn->reqid;
281 msg.add_conn.mark_in.value = conn->mark_in.value;
282 msg.add_conn.mark_in.mask = conn->mark_in.mask;
283 msg.add_conn.mark_out.value = conn->mark_out.value;
284 msg.add_conn.mark_out.mask = conn->mark_out.mask;
285 msg.add_conn.tfc = conn->tfc;
286
287 starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->left);
288 starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->right);
289
290 return send_stroke_msg(&msg);
291 }
292
293 int starter_stroke_del_conn(starter_conn_t *conn)
294 {
295 stroke_msg_t msg;
296
297 msg.type = STR_DEL_CONN;
298 msg.length = offsetof(stroke_msg_t, buffer);
299 msg.del_conn.name = push_string(&msg, connection_name(conn));
300 return send_stroke_msg(&msg);
301 }
302
303 int starter_stroke_route_conn(starter_conn_t *conn)
304 {
305 stroke_msg_t msg;
306
307 msg.type = STR_ROUTE;
308 msg.length = offsetof(stroke_msg_t, buffer);
309 msg.route.name = push_string(&msg, connection_name(conn));
310 return send_stroke_msg(&msg);
311 }
312
313 int starter_stroke_initiate_conn(starter_conn_t *conn)
314 {
315 stroke_msg_t msg;
316
317 msg.type = STR_INITIATE;
318 msg.length = offsetof(stroke_msg_t, buffer);
319 msg.initiate.name = push_string(&msg, connection_name(conn));
320 return send_stroke_msg(&msg);
321 }
322
323 int starter_stroke_add_ca(starter_ca_t *ca)
324 {
325 stroke_msg_t msg;
326
327 msg.type = STR_ADD_CA;
328 msg.length = offsetof(stroke_msg_t, buffer);
329 msg.add_ca.name = push_string(&msg, ca->name);
330 msg.add_ca.cacert = push_string(&msg, ca->cacert);
331 msg.add_ca.crluri = push_string(&msg, ca->crluri);
332 msg.add_ca.crluri2 = push_string(&msg, ca->crluri2);
333 msg.add_ca.ocspuri = push_string(&msg, ca->ocspuri);
334 msg.add_ca.ocspuri2 = push_string(&msg, ca->ocspuri2);
335 msg.add_ca.certuribase = push_string(&msg, ca->certuribase);
336 return send_stroke_msg(&msg);
337 }
338
339 int starter_stroke_del_ca(starter_ca_t *ca)
340 {
341 stroke_msg_t msg;
342
343 msg.type = STR_DEL_CA;
344 msg.length = offsetof(stroke_msg_t, buffer);
345 msg.del_ca.name = push_string(&msg, ca->name);
346 return send_stroke_msg(&msg);
347 }
348
349 int starter_stroke_configure(starter_config_t *cfg)
350 {
351 stroke_msg_t msg;
352
353 if (cfg->setup.cachecrls)
354 {
355 msg.type = STR_CONFIG;
356 msg.length = offsetof(stroke_msg_t, buffer);
357 msg.config.cachecrl = 1;
358 return send_stroke_msg(&msg);
359 }
360 return 0;
361 }
362