supporting multiple comma seperated subnets in left/rightsubnet definition
[strongswan.git] / src / starter / starterwhack.c
1 /* strongSwan whack functions to communicate with pluto (whack.c)
2 * Copyright (C) 2001-2002 Mathieu Lafon - Arkoon Network Security
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * RCSID $Id$
15 */
16
17 #include <sys/types.h>
18 #include <sys/socket.h>
19 #include <sys/un.h>
20 #include <stddef.h>
21 #include <unistd.h>
22 #include <errno.h>
23
24 #include <freeswan.h>
25
26 #include <constants.h>
27 #include <defs.h>
28 #include <log.h>
29 #include <whack.h>
30
31 #include "starterwhack.h"
32 #include "confread.h"
33 #include "files.h"
34
35 #define ip_version(string) (strchr(string, '.') ? AF_INET : AF_INET6)
36
37 static int
38 pack_str (char **p, char **next, char **roof)
39 {
40 const char *s = (*p==NULL) ? "" : *p; /* note: NULL becomes ""! */
41 size_t len = strlen(s) + 1;
42
43 if ((*roof - *next) < len)
44 {
45 return 0; /* not enough space */
46 }
47 else
48 {
49 strcpy(*next, s);
50 *next += len;
51 *p = NULL; /* don't send pointers on the wire! */
52 return 1;
53 }
54 }
55
56 static int
57 send_whack_msg (whack_message_t *msg)
58 {
59 struct sockaddr_un ctl_addr = { AF_UNIX, PLUTO_CTL_FILE };
60 int sock;
61 ssize_t len;
62 char *str_next, *str_roof;
63
64 /* pack strings */
65 str_next = (char *)msg->string;
66 str_roof = (char *)&msg->string[sizeof(msg->string)];
67
68 if (!pack_str(&msg->name, &str_next, &str_roof)
69 || !pack_str(&msg->left.id, &str_next, &str_roof)
70 || !pack_str(&msg->left.cert, &str_next, &str_roof)
71 || !pack_str(&msg->left.ca, &str_next, &str_roof)
72 || !pack_str(&msg->left.groups, &str_next, &str_roof)
73 || !pack_str(&msg->left.updown, &str_next, &str_roof)
74 || !pack_str(&msg->left.virt, &str_next, &str_roof)
75 || !pack_str(&msg->right.id, &str_next, &str_roof)
76 || !pack_str(&msg->right.cert, &str_next, &str_roof)
77 || !pack_str(&msg->right.ca, &str_next, &str_roof)
78 || !pack_str(&msg->right.groups, &str_next, &str_roof)
79 || !pack_str(&msg->right.updown, &str_next, &str_roof)
80 || !pack_str(&msg->right.virt, &str_next, &str_roof)
81 || !pack_str(&msg->keyid, &str_next, &str_roof)
82 || !pack_str(&msg->myid, &str_next, &str_roof)
83 || !pack_str(&msg->cacert, &str_next, &str_roof)
84 || !pack_str(&msg->ldaphost, &str_next, &str_roof)
85 || !pack_str(&msg->ldapbase, &str_next, &str_roof)
86 || !pack_str(&msg->crluri, &str_next, &str_roof)
87 || !pack_str(&msg->crluri2, &str_next, &str_roof)
88 || !pack_str(&msg->ocspuri, &str_next, &str_roof)
89 || !pack_str(&msg->ike, &str_next, &str_roof)
90 || !pack_str(&msg->esp, &str_next, &str_roof)
91 || !pack_str(&msg->sc_data, &str_next, &str_roof)
92 || (str_roof - str_next < msg->keyval.len))
93 {
94 plog("send_wack_msg(): can't pack strings");
95 return -1;
96 }
97 if (msg->keyval.ptr)
98 memcpy(str_next, msg->keyval.ptr, msg->keyval.len);
99 msg->keyval.ptr = NULL;
100 str_next += msg->keyval.len;
101 len = str_next - (char *)msg;
102
103 /* connect to pluto ctl */
104 sock = socket(AF_UNIX, SOCK_STREAM, 0);
105 if (sock < 0)
106 {
107 plog("socket() failed: %s", strerror(errno));
108 return -1;
109 }
110 if (connect(sock, (struct sockaddr *)&ctl_addr,
111 offsetof(struct sockaddr_un, sun_path) + strlen(ctl_addr.sun_path)) < 0)
112 {
113 plog("connect(pluto_ctl) failed: %s", strerror(errno));
114 close(sock);
115 return -1;
116 }
117
118 /* send message */
119 if (write(sock, msg, len) != len)
120 {
121 plog("write(pluto_ctl) failed: %s", strerror(errno));
122 close(sock);
123 return -1;
124 }
125
126 /* TODO: read reply */
127 close(sock);
128 return 0;
129 }
130
131 static void
132 init_whack_msg(whack_message_t *msg)
133 {
134 memset(msg, 0, sizeof(whack_message_t));
135 msg->magic = WHACK_MAGIC;
136 }
137
138 static char *
139 connection_name(starter_conn_t *conn)
140 {
141 /* if connection name is '%auto', create a new name like conn_xxxxx */
142 static char buf[32];
143
144 if (streq(conn->name, "%auto"))
145 {
146 sprintf(buf, "conn_%ld", conn->id);
147 return buf;
148 }
149 return conn->name;
150 }
151
152 static void
153 set_whack_end(whack_end_t *w, starter_end_t *end, sa_family_t family)
154 {
155 if (end->srcip && end->srcip[0] != '%')
156 {
157 int len = 0;
158 char *pos;
159
160 pos = strchr(end->srcip, '/');
161 if (pos)
162 {
163 /* use first address only for pluto */
164 len = pos - end->srcip;
165 }
166 w->has_srcip = !end->has_natip;
167 ttoaddr(end->srcip, len, ip_version(end->srcip), &w->host_srcip);
168 }
169 else
170 {
171 anyaddr(AF_INET, &w->host_srcip);
172 }
173
174 w->id = end->id;
175 w->cert = end->cert;
176 w->ca = end->ca;
177 w->groups = end->groups;
178 w->host_addr = end->addr;
179 w->has_client = end->has_client;
180
181 if (family == AF_INET6 && isanyaddr(&end->nexthop))
182 {
183 anyaddr(AF_INET6, &end->nexthop);
184 }
185 w->host_nexthop = end->nexthop;
186
187 if (w->has_client)
188 {
189 char *pos;
190 int len = 0;
191
192 pos = strchr(end->subnet, ',');
193 if (pos)
194 {
195 len = pos - end->subnet;
196 }
197 ttosubnet(end->subnet, len, ip_version(end->subnet), &w->client);
198 }
199 else
200 w->client.addr.u.v4.sin_family = addrtypeof(&w->host_addr);
201
202 w->has_client_wildcard = end->has_client_wildcard;
203 w->has_port_wildcard = end->has_port_wildcard;
204 w->has_natip = end->has_natip;
205 w->allow_any = end->allow_any && !end->dns_failed;
206 w->modecfg = end->modecfg;
207 w->hostaccess = end->hostaccess;
208 w->sendcert = end->sendcert;
209 w->updown = end->updown;
210 w->host_port = IKE_UDP_PORT;
211 w->port = end->port;
212 w->protocol = end->protocol;
213 w->virt = end->virt;
214
215 if (w->port != 0)
216 {
217 int port = htons(w->port);
218
219 setportof(port, &w->host_addr);
220 setportof(port, &w->client.addr);
221 }
222 }
223
224 static int
225 starter_whack_add_pubkey (starter_conn_t *conn, starter_end_t *end
226 , const char *lr)
227 {
228 const char *err;
229 static char keyspace[1024 + 4];
230 whack_message_t msg;
231
232 init_whack_msg(&msg);
233
234 msg.whack_key = TRUE;
235 msg.pubkey_alg = PUBKEY_ALG_RSA;
236 if (end->id && end->rsakey)
237 {
238 /* special values to ignore */
239 if (streq(end->rsakey, "")
240 || streq(end->rsakey, "%none")
241 || streq(end->rsakey, "%cert")
242 || streq(end->rsakey, "0x00"))
243 {
244 return 0;
245 }
246 msg.keyid = end->id;
247 err = atobytes(end->rsakey, 0, keyspace, sizeof(keyspace), &msg.keyval.len);
248 if (err)
249 {
250 plog("conn %s/%s: rsakey malformed [%s]", connection_name(conn), lr, err);
251 return 1;
252 }
253 else
254 {
255 msg.keyval.ptr = keyspace;
256 return send_whack_msg(&msg);
257 }
258 }
259 return 0;
260 }
261
262 int
263 starter_whack_add_conn(starter_conn_t *conn)
264 {
265 whack_message_t msg;
266 int r;
267
268 init_whack_msg(&msg);
269
270 msg.whack_connection = TRUE;
271 msg.name = connection_name(conn);
272
273 msg.ikev1 = conn->keyexchange != KEY_EXCHANGE_IKEV2;
274 msg.addr_family = conn->addr_family;
275 msg.tunnel_addr_family = conn->tunnel_addr_family;
276 msg.sa_ike_life_seconds = conn->sa_ike_life_seconds;
277 msg.sa_ipsec_life_seconds = conn->sa_ipsec_life_seconds;
278 msg.sa_rekey_margin = conn->sa_rekey_margin;
279 msg.sa_rekey_fuzz = conn->sa_rekey_fuzz;
280 msg.sa_keying_tries = conn->sa_keying_tries;
281 msg.policy = conn->policy;
282
283 /*
284 * Make sure the IKEv2-only policy bits are unset for IKEv1 connections
285 */
286 msg.policy &= ~POLICY_DONT_REAUTH;
287 msg.policy &= ~POLICY_BEET;
288 msg.policy &= ~POLICY_MOBIKE;
289 msg.policy &= ~POLICY_FORCE_ENCAP;
290
291 set_whack_end(&msg.left, &conn->left, conn->addr_family);
292 set_whack_end(&msg.right, &conn->right, conn->addr_family);
293
294 msg.esp = conn->esp;
295 msg.ike = conn->ike;
296 msg.pfsgroup = conn->pfsgroup;
297
298 /* taken from pluto/whack.c */
299 if (msg.pfsgroup)
300 {
301 char esp_buf[256];
302
303 snprintf(esp_buf, sizeof (esp_buf), "%s;%s"
304 , msg.esp ? msg.esp : ""
305 , msg.pfsgroup ? msg.pfsgroup : "");
306 msg.esp = esp_buf;
307
308 DBG(DBG_CONTROL,
309 DBG_log("Setting --esp=%s", msg.esp)
310 )
311 }
312 msg.dpd_delay = conn->dpd_delay;
313 msg.dpd_timeout = conn->dpd_timeout;
314 msg.dpd_action = conn->dpd_action;
315 /* msg.dpd_count = conn->dpd_count; not supported yet by strongSwan */
316
317 r = send_whack_msg(&msg);
318
319 if (r == 0 && (conn->policy & POLICY_RSASIG))
320 {
321 r += starter_whack_add_pubkey (conn, &conn->left, "left");
322 r += starter_whack_add_pubkey (conn, &conn->right, "right");
323 }
324
325 return r;
326 }
327
328 int
329 starter_whack_del_conn(starter_conn_t *conn)
330 {
331 whack_message_t msg;
332
333 init_whack_msg(&msg);
334 msg.whack_delete = TRUE;
335 msg.name = connection_name(conn);
336 return send_whack_msg(&msg);
337 }
338
339 int
340 starter_whack_route_conn(starter_conn_t *conn)
341 {
342 whack_message_t msg;
343
344 init_whack_msg(&msg);
345 msg.whack_route = TRUE;
346 msg.name = connection_name(conn);
347 return send_whack_msg(&msg);
348 }
349
350 int
351 starter_whack_initiate_conn(starter_conn_t *conn)
352 {
353 whack_message_t msg;
354
355 init_whack_msg(&msg);
356 msg.whack_initiate = TRUE;
357 msg.whack_async = TRUE;
358 msg.name = connection_name(conn);
359 return send_whack_msg(&msg);
360 }
361
362 int
363 starter_whack_listen(void)
364 {
365 whack_message_t msg;
366 init_whack_msg(&msg);
367 msg.whack_listen = TRUE;
368 return send_whack_msg(&msg);
369 }
370
371 int starter_whack_shutdown(void)
372 {
373 whack_message_t msg;
374
375 init_whack_msg(&msg);
376 msg.whack_shutdown = TRUE;
377 return send_whack_msg(&msg);
378 }
379
380 int
381 starter_whack_add_ca(starter_ca_t *ca)
382 {
383 whack_message_t msg;
384
385 init_whack_msg(&msg);
386
387 msg.whack_ca = TRUE;
388 msg.name = ca->name;
389 msg.cacert = ca->cacert;
390 msg.ldaphost = ca->ldaphost;
391 msg.ldapbase = ca->ldapbase;
392 msg.crluri = ca->crluri;
393 msg.crluri2 = ca->crluri2;
394 msg.ocspuri = ca->ocspuri;
395 msg.whack_strict = ca->strict;
396
397 return send_whack_msg(&msg);
398 }
399
400 int
401 starter_whack_del_ca(starter_ca_t *ca)
402 {
403 whack_message_t msg;
404
405 init_whack_msg(&msg);
406
407 msg.whack_delete = TRUE;
408 msg.whack_ca = TRUE;
409 msg.name = ca->name;
410
411 return send_whack_msg(&msg);
412 }