8fbfc0bdb23afb14ff00c7067365e64690a1f024
[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 methods, must be the same as in charons authenticator.h
42 */
43 enum auth_method_t {
44 AUTH_PUBKEY = 1,
45 AUTH_PSK = 2,
46 AUTH_EAP = 3
47 };
48
49 static char* push_string(stroke_msg_t *msg, char *string)
50 {
51 unsigned long string_start = msg->length;
52
53 if (string == NULL || msg->length + strlen(string) >= sizeof(stroke_msg_t))
54 {
55 return NULL;
56 }
57 else
58 {
59 msg->length += strlen(string) + 1;
60 strcpy((char*)msg + string_start, string);
61 return (char*)string_start;
62 }
63 }
64
65 static int send_stroke_msg (stroke_msg_t *msg)
66 {
67 struct sockaddr_un ctl_addr = { AF_UNIX, CHARON_CTL_FILE };
68 int byte_count;
69 char buffer[64];
70
71 /* starter is not called from commandline, and therefore absolutely silent */
72 msg->output_verbosity = -1;
73
74 int sock = socket(AF_UNIX, SOCK_STREAM, 0);
75
76 if (sock < 0)
77 {
78 plog("socket() failed: %s", strerror(errno));
79 return -1;
80 }
81 if (connect(sock, (struct sockaddr *)&ctl_addr, offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
82 {
83 plog("connect(charon_ctl) failed: %s", strerror(errno));
84 close(sock);
85 return -1;
86 }
87
88 /* send message */
89 if (write(sock, msg, msg->length) != msg->length)
90 {
91 plog("write(charon_ctl) failed: %s", strerror(errno));
92 close(sock);
93 return -1;
94 }
95 while ((byte_count = read(sock, buffer, sizeof(buffer)-1)) > 0)
96 {
97 buffer[byte_count] = '\0';
98 plog("%s", buffer);
99 }
100 if (byte_count < 0)
101 {
102 plog("read() failed: %s", strerror(errno));
103 }
104
105 close(sock);
106 return 0;
107 }
108
109 static char* connection_name(starter_conn_t *conn)
110 {
111 /* if connection name is '%auto', create a new name like conn_xxxxx */
112 static char buf[32];
113
114 if (streq(conn->name, "%auto"))
115 {
116 sprintf(buf, "conn_%ld", conn->id);
117 return buf;
118 }
119 return conn->name;
120 }
121
122 static void ip_address2string(ip_address *addr, char *buffer, size_t len)
123 {
124 switch (((struct sockaddr*)addr)->sa_family)
125 {
126 case AF_INET:
127 {
128 struct sockaddr_in* sin = (struct sockaddr_in*)addr;
129 if (inet_ntop(AF_INET, &sin->sin_addr, buffer, len))
130 {
131 return;
132 }
133 break;
134 }
135 case AF_INET6:
136 {
137 struct sockaddr_in6* sin6 = (struct sockaddr_in6*)addr;
138 if (inet_ntop(AF_INET6, &sin6->sin6_addr, buffer, len))
139 {
140 return;
141 }
142 break;
143 }
144 default:
145 break;
146 }
147 /* failed */
148 snprintf(buffer, len, "0.0.0.0");
149 }
150
151
152 static void starter_stroke_add_end(stroke_msg_t *msg, stroke_end_t *msg_end, starter_end_t *conn_end)
153 {
154 char buffer[INET6_ADDRSTRLEN];
155
156 msg_end->id = push_string(msg, conn_end->id);
157 msg_end->cert = push_string(msg, conn_end->cert);
158 msg_end->ca = push_string(msg, conn_end->ca);
159 msg_end->groups = push_string(msg, conn_end->groups);
160 msg_end->updown = push_string(msg, conn_end->updown);
161 ip_address2string(&conn_end->addr, buffer, sizeof(buffer));
162 msg_end->address = push_string(msg, buffer);
163 msg_end->subnets = push_string(msg, conn_end->subnet);
164 msg_end->sendcert = conn_end->sendcert;
165 msg_end->hostaccess = conn_end->hostaccess;
166 msg_end->tohost = !conn_end->has_client;
167 msg_end->protocol = conn_end->protocol;
168 msg_end->port = conn_end->port;
169 if (conn_end->srcip)
170 {
171 if (conn_end->srcip[0] == '%')
172 { /* %poolname, strip % */
173 msg_end->sourceip_size = 0;
174 msg_end->sourceip = push_string(msg, conn_end->srcip + 1);
175 }
176 else
177 {
178 char *pos = strchr(conn_end->srcip, '/');
179 if (pos)
180 { /* CIDR subnet definition */
181 snprintf(buffer, pos - conn_end->srcip + 1, "%s", conn_end->srcip);
182 msg_end->sourceip = push_string(msg, buffer);
183 msg_end->sourceip_size = atoi(pos + 1);
184 }
185 else
186 { /* a single address */
187 msg_end->sourceip = push_string(msg, conn_end->srcip);
188 if (strchr(conn_end->srcip, ':'))
189 { /* IPv6 */
190 msg_end->sourceip_size = 128;
191 }
192 else
193 { /* IPv4 */
194 msg_end->sourceip_size = 32;
195 }
196 }
197 }
198 }
199 else if (conn_end->modecfg)
200 {
201 msg_end->sourceip_size = 1;
202 }
203 }
204
205 int starter_stroke_add_conn(starter_config_t *cfg, starter_conn_t *conn)
206 {
207 stroke_msg_t msg;
208
209 memset(&msg, 0, sizeof(msg));
210 msg.type = STR_ADD_CONN;
211 msg.length = offsetof(stroke_msg_t, buffer);
212 msg.add_conn.ikev2 = conn->keyexchange == KEY_EXCHANGE_IKEV2;
213 msg.add_conn.name = push_string(&msg, connection_name(conn));
214
215 /* PUBKEY is preferred to PSK and EAP */
216 if (conn->policy & POLICY_RSASIG || conn->policy & POLICY_ECDSASIG)
217 {
218 msg.add_conn.auth_method = AUTH_PUBKEY;
219 }
220 else if (conn->policy & POLICY_PSK)
221 {
222 msg.add_conn.auth_method = AUTH_PSK;
223 }
224 else
225 {
226 msg.add_conn.auth_method = AUTH_EAP;
227 }
228 msg.add_conn.eap_type = conn->eap_type;
229 msg.add_conn.eap_vendor = conn->eap_vendor;
230 msg.add_conn.eap_identity = push_string(&msg, conn->eap_identity);
231
232 if (conn->policy & POLICY_TUNNEL)
233 {
234 msg.add_conn.mode = 1; /* XFRM_MODE_TRANSPORT */
235 }
236 else if (conn->policy & POLICY_BEET)
237 {
238 msg.add_conn.mode = 4; /* XFRM_MODE_BEET */
239 }
240 else
241 {
242 msg.add_conn.mode = 0; /* XFRM_MODE_TUNNEL */
243 }
244
245 if (!(conn->policy & POLICY_DONT_REKEY))
246 {
247 msg.add_conn.rekey.reauth = (conn->policy & POLICY_DONT_REAUTH) == LEMPTY;
248 msg.add_conn.rekey.ipsec_lifetime = conn->sa_ipsec_life_seconds;
249 msg.add_conn.rekey.ike_lifetime = conn->sa_ike_life_seconds;
250 msg.add_conn.rekey.margin = conn->sa_rekey_margin;
251 msg.add_conn.rekey.tries = conn->sa_keying_tries;
252 msg.add_conn.rekey.fuzz = conn->sa_rekey_fuzz;
253 }
254 msg.add_conn.mobike = conn->policy & POLICY_MOBIKE;
255 msg.add_conn.force_encap = conn->policy & POLICY_FORCE_ENCAP;
256 msg.add_conn.ipcomp = conn->policy & POLICY_COMPRESS;
257 msg.add_conn.crl_policy = cfg->setup.strictcrlpolicy;
258 msg.add_conn.unique = cfg->setup.uniqueids;
259 msg.add_conn.algorithms.ike = push_string(&msg, conn->ike);
260 msg.add_conn.algorithms.esp = push_string(&msg, conn->esp);
261 msg.add_conn.dpd.delay = conn->dpd_delay;
262 msg.add_conn.dpd.action = conn->dpd_action;
263 msg.add_conn.ikeme.mediation = conn->me_mediation;
264 msg.add_conn.ikeme.mediated_by = push_string(&msg, conn->me_mediated_by);
265 msg.add_conn.ikeme.peerid = push_string(&msg, conn->me_peerid);
266
267 starter_stroke_add_end(&msg, &msg.add_conn.me, &conn->left);
268 starter_stroke_add_end(&msg, &msg.add_conn.other, &conn->right);
269
270 return send_stroke_msg(&msg);
271 }
272
273 int starter_stroke_del_conn(starter_conn_t *conn)
274 {
275 stroke_msg_t msg;
276
277 msg.type = STR_DEL_CONN;
278 msg.length = offsetof(stroke_msg_t, buffer);
279 msg.del_conn.name = push_string(&msg, connection_name(conn));
280 return send_stroke_msg(&msg);
281 }
282
283 int starter_stroke_route_conn(starter_conn_t *conn)
284 {
285 stroke_msg_t msg;
286
287 msg.type = STR_ROUTE;
288 msg.length = offsetof(stroke_msg_t, buffer);
289 msg.route.name = push_string(&msg, connection_name(conn));
290 return send_stroke_msg(&msg);
291 }
292
293 int starter_stroke_initiate_conn(starter_conn_t *conn)
294 {
295 stroke_msg_t msg;
296
297 msg.type = STR_INITIATE;
298 msg.length = offsetof(stroke_msg_t, buffer);
299 msg.initiate.name = push_string(&msg, connection_name(conn));
300 return send_stroke_msg(&msg);
301 }
302
303 int starter_stroke_add_ca(starter_ca_t *ca)
304 {
305 stroke_msg_t msg;
306
307 msg.type = STR_ADD_CA;
308 msg.length = offsetof(stroke_msg_t, buffer);
309 msg.add_ca.name = push_string(&msg, ca->name);
310 msg.add_ca.cacert = push_string(&msg, ca->cacert);
311 msg.add_ca.crluri = push_string(&msg, ca->crluri);
312 msg.add_ca.crluri2 = push_string(&msg, ca->crluri2);
313 msg.add_ca.ocspuri = push_string(&msg, ca->ocspuri);
314 msg.add_ca.ocspuri2 = push_string(&msg, ca->ocspuri2);
315 msg.add_ca.certuribase = push_string(&msg, ca->certuribase);
316 return send_stroke_msg(&msg);
317 }
318
319 int starter_stroke_del_ca(starter_ca_t *ca)
320 {
321 stroke_msg_t msg;
322
323 msg.type = STR_DEL_CA;
324 msg.length = offsetof(stroke_msg_t, buffer);
325 msg.del_ca.name = push_string(&msg, ca->name);
326 return send_stroke_msg(&msg);
327 }
328
329 int starter_stroke_configure(starter_config_t *cfg)
330 {
331 stroke_msg_t msg;
332
333 if (cfg->setup.cachecrls)
334 {
335 msg.type = STR_CONFIG;
336 msg.length = offsetof(stroke_msg_t, buffer);
337 msg.config.cachecrl = 1;
338 return send_stroke_msg(&msg);
339 }
340 return 0;
341 }
342