radsecproxy.c 124 KB
Newer Older
venaas's avatar
 
venaas committed
1
/*
2
 * Copyright (C) 2006-2008 Stig Venaas <venaas@uninett.no>
venaas's avatar
 
venaas committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 */

/* For UDP there is one server instance consisting of udpserverrd and udpserverth
 *              rd is responsible for init and launching wr
 * For TLS there is a server instance that launches tlsserverrd for each TLS peer
 *          each tlsserverrd launches tlsserverwr
 * For each UDP/TLS peer there is clientrd and clientwr, clientwr is responsible
 *          for init and launching rd
 *
 * serverrd will receive a request, processes it and puts it in the requestq of
 *          the appropriate clientwr
 * clientwr monitors its requestq and sends requests
 * clientrd looks for responses, processes them and puts them in the replyq of
 *          the peer the request came from
 * serverwr monitors its reply and sends replies
 *
 * In addition to the main thread, we have:
 * If UDP peers are configured, there will be 2 + 2 * #peers UDP threads
 * If TLS peers are configured, there will initially be 2 * #peers TLS threads
 * For each TLS peer connecting to us there will be 2 more TLS threads
 *       This is only for connected peers
 * Example: With 3 UDP peer and 30 TLS peers, there will be a max of
 *          1 + (2 + 2 * 3) + (2 * 30) + (2 * 30) = 129 threads
*/

venaas's avatar
venaas committed
32
/* Bugs:
33
 * TCP accounting not yet supported
venaas's avatar
venaas committed
34
35
36
 * We are not removing client requests from dynamic servers, see removeclientrqs()
 */

venaas's avatar
venaas committed
37
#include <signal.h>
venaas's avatar
venaas committed
38
39
#include <sys/socket.h>
#include <netinet/in.h>
venaas's avatar
 
venaas committed
40
#include <netdb.h>
venaas's avatar
venaas committed
41
#include <string.h>
venaas's avatar
 
venaas committed
42
#include <unistd.h>
venaas's avatar
venaas committed
43
#include <limits.h>
venaas's avatar
venaas committed
44
45
46
#ifdef SYS_SOLARIS9
#include <fcntl.h>
#endif
venaas's avatar
venaas committed
47
#include <sys/time.h>
48
#include <sys/types.h>
49
#include <sys/select.h>
50
#include <ctype.h>
51
#include <sys/wait.h>
52
#include <arpa/inet.h>
venaas's avatar
venaas committed
53
#include <regex.h>
venaas's avatar
venaas committed
54
#include <libgen.h>
venaas's avatar
 
venaas committed
55
56
57
58
59
#include <pthread.h>
#include <openssl/ssl.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/md5.h>
venaas's avatar
venaas committed
60
#include <openssl/hmac.h>
61
#include <openssl/x509v3.h>
venaas's avatar
venaas committed
62
#include "debug.h"
venaas's avatar
venaas committed
63
#include "list.h"
64
65
#include "util.h"
#include "gconfig.h"
venaas's avatar
venaas committed
66
#include "radsecproxy.h"
venaas's avatar
 
venaas committed
67

68
static struct options options;
69
struct list *clconfs, *srvconfs, *realms, *tlsconfs, *rewriteconfs;
70

venaas's avatar
venaas committed
71
static struct addrinfo *srcprotores[3] = { NULL, NULL, NULL };
72

venaas's avatar
venaas committed
73
static struct replyq *udp_server_replyq = NULL;
74
75
static int udp_client4_sock = -1;
static int udp_client6_sock = -1;
venaas's avatar
venaas committed
76
77
static pthread_mutex_t tlsconfs_lock;
static pthread_mutex_t *ssl_locks = NULL;
venaas's avatar
 
venaas committed
78
79
80
81
static long *ssl_lock_count;
extern int optind;
extern char *optarg;

venaas's avatar
venaas committed
82
83
/* minimum required declarations to avoid reordering code */
void adddynamicrealmserver(struct realm *realm, struct clsrvconf *conf, char *id);
84
int dynamicconfig(struct server *server);
85
int confserver_cb(struct gconffile **cf, void *arg, char *block, char *opt, char *val);
86
87
void freerealm(struct realm *realm);
void freeclsrvconf(struct clsrvconf *conf);
88
void freerqdata(struct request *rq);
89
90
91
void *udpserverrd(void *arg);
void *tlslistener(void *arg);
void *tcplistener(void *arg);
venaas's avatar
venaas committed
92
int tlsconnect(struct server *server, struct timeval *when, int timeout, char *text);
93
int dtlsconnect(struct server *server, struct timeval *when, int timeout, char *text);
venaas's avatar
venaas committed
94
95
96
int tcpconnect(struct server *server, struct timeval *when, int timeout, char *text);
void *udpclientrd(void *arg);
void *tlsclientrd(void *arg);
97
void *dtlsclientrd(void *arg);
venaas's avatar
venaas committed
98
99
100
void *tcpclientrd(void *arg);
int clientradputudp(struct server *server, unsigned char *rad);
int clientradputtls(struct server *server, unsigned char *rad);
101
int clientradputdtls(struct server *server, unsigned char *rad);
venaas's avatar
venaas committed
102
103
int clientradputtcp(struct server *server, unsigned char *rad);
    
104
static const struct protodefs protodefs[] = {
venaas's avatar
venaas committed
105
106
    {   "udp", /* UDP, assuming RAD_UDP defined as 0 */
	NULL, /* secretdefault */
venaas's avatar
venaas committed
107
108
	SOCK_DGRAM, /* socktype */
	"1812", /* portdefault */
109
110
111
	REQUEST_RETRY_COUNT, /* retrycountdefault */
	10, /* retrycountmax */
	REQUEST_RETRY_INTERVAL, /* retryintervaldefault */
112
	60, /* retryintervalmax */
venaas's avatar
venaas committed
113
114
115
116
117
	udpserverrd, /* listener */
	&options.sourceudp, /* srcaddrport */
	NULL, /* connecter */
	udpclientrd, /* clientreader */
	clientradputudp /* clientradput */
118
    },
venaas's avatar
venaas committed
119
120
    {   "tls", /* TLS, assuming RAD_TLS defined as 1 */
	"mysecret", /* secretdefault */
venaas's avatar
venaas committed
121
122
	SOCK_STREAM, /* socktype */
	"2083", /* portdefault */
venaas's avatar
venaas committed
123
124
125
	0, /* retrycountdefault */
	0, /* retrycountmax */
	REQUEST_RETRY_INTERVAL * REQUEST_RETRY_COUNT, /* retryintervaldefault */
126
	60, /* retryintervalmax */
venaas's avatar
venaas committed
127
128
129
130
131
	tlslistener, /* listener */
	&options.sourcetls, /* srcaddrport */
	tlsconnect, /* connecter */
	tlsclientrd, /* clientreader */
	clientradputtls /* clientradput */
venaas's avatar
venaas committed
132
133
134
    },
    {   "tcp", /* TCP, assuming RAD_TCP defined as 2 */
	NULL, /* secretdefault */
venaas's avatar
venaas committed
135
136
	SOCK_STREAM, /* socktype */
	"1812", /* portdefault */
137
138
139
	0, /* retrycountdefault */
	0, /* retrycountmax */
	REQUEST_RETRY_INTERVAL * REQUEST_RETRY_COUNT, /* retryintervaldefault */
140
	60, /* retryintervalmax */
venaas's avatar
venaas committed
141
142
143
144
145
	tcplistener, /* listener */
	&options.sourcetcp, /* srcaddrport */
	tcpconnect, /* connecter */
	tcpclientrd, /* clientreader */
	clientradputtcp /* clientradput */
venaas's avatar
venaas committed
146
    },
venaas's avatar
venaas committed
147
148
149
150
151
152
153
154
155
156
    {   "dtls", /* DTLS, assuming RAD_DTLS defined as 3 */
	NULL, /* secretdefault */
	SOCK_DGRAM, /* socktype */
	"1812", /* portdefault */
	REQUEST_RETRY_COUNT, /* retrycountdefault */
	10, /* retrycountmax */
	REQUEST_RETRY_INTERVAL, /* retryintervaldefault */
	60, /* retryintervalmax */
	udpserverrd, /* listener */
	&options.sourceudp, /* srcaddrport */
157
158
159
	dtlsconnect, /* connecter */
	dtlsclientrd, /* clientreader */
	clientradputdtls /* clientradput */
venaas's avatar
venaas committed
160
    },
venaas's avatar
venaas committed
161
    {   NULL
162
163
164
    }
};

venaas's avatar
venaas committed
165
166
167
168
169
170
171
uint8_t protoname2int(const char *name) {
    int i;

    for (i = 0; protodefs[i].name && strcasecmp(protodefs[i].name, name); i++);
    return i;
}
    
venaas's avatar
 
venaas committed
172
173
174
/* callbacks for making OpenSSL thread safe */
unsigned long ssl_thread_id() {
        return (unsigned long)pthread_self();
venaas's avatar
venaas committed
175
}
venaas's avatar
 
venaas committed
176
177
178
179
180
181
182
183
184

void ssl_locking_callback(int mode, int type, const char *file, int line) {
    if (mode & CRYPTO_LOCK) {
	pthread_mutex_lock(&ssl_locks[type]);
	ssl_lock_count[type]++;
    } else
	pthread_mutex_unlock(&ssl_locks[type]);
}

venaas's avatar
venaas committed
185
186
187
188
189
190
191
192
static int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata) {
    int pwdlen = strlen(userdata);
    if (rwflag != 0 || pwdlen > size) /* not for decryption or too large */
	return 0;
    memcpy(buf, userdata, pwdlen);
    return pwdlen;
}

193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
static int verify_cb(int ok, X509_STORE_CTX *ctx) {
  char buf[256];
  X509 *err_cert;
  int err, depth;

  err_cert = X509_STORE_CTX_get_current_cert(ctx);
  err = X509_STORE_CTX_get_error(ctx);
  depth = X509_STORE_CTX_get_error_depth(ctx);

  if (depth > MAX_CERT_DEPTH) {
      ok = 0;
      err = X509_V_ERR_CERT_CHAIN_TOO_LONG;
      X509_STORE_CTX_set_error(ctx, err);
  }

  if (!ok) {
      X509_NAME_oneline(X509_get_subject_name(err_cert), buf, 256);
210
      debug(DBG_WARN, "verify error: num=%d:%s:depth=%d:%s", err, X509_verify_cert_error_string(err), depth, buf);
211
212
213
214

      switch (err) {
      case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
	  X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), buf, 256);
215
	  debug(DBG_WARN, "\tIssuer=%s", buf);
216
217
218
	  break;
      case X509_V_ERR_CERT_NOT_YET_VALID:
      case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
219
	  debug(DBG_WARN, "\tCertificate not yet valid");
220
221
	  break;
      case X509_V_ERR_CERT_HAS_EXPIRED:
222
	  debug(DBG_WARN, "Certificate has expired");
223
224
	  break;
      case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
225
	  debug(DBG_WARN, "Certificate no longer valid (after notAfter)");
226
227
228
	  break;
      }
  }
229
230
231
#ifdef DEBUG  
  printf("certificate verify returns %d\n", ok);
#endif  
232
233
234
  return ok;
}

venaas's avatar
venaas committed
235
int resolvepeer(struct clsrvconf *conf, int ai_flags) {
236
    struct addrinfo hints, *addrinfo, *res;
237
    char *slash, *s;
venaas's avatar
venaas committed
238
    int plen = 0;
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258

    slash = conf->host ? strchr(conf->host, '/') : NULL;
    if (slash) {
	s = slash + 1;
	if (!*s) {
	    debug(DBG_WARN, "resolvepeer: prefix length must be specified after the / in %s", conf->host);
	    return 0;
	}
	for (; *s; s++)
	    if (*s < '0' || *s > '9') {
		debug(DBG_WARN, "resolvepeer: %s in %s is not a valid prefix length", slash + 1, conf->host);
		return 0;
	    }
	plen = atoi(slash + 1);
	if (plen < 0 || plen > 128) {
	    debug(DBG_WARN, "resolvepeer: %s in %s is not a valid prefix length", slash + 1, conf->host);
	    return 0;
	}
	*slash = '\0';
    }
venaas's avatar
 
venaas committed
259
    memset(&hints, 0, sizeof(hints));
venaas's avatar
venaas committed
260
    hints.ai_socktype = conf->pdef->socktype;
venaas's avatar
 
venaas committed
261
    hints.ai_family = AF_UNSPEC;
venaas's avatar
venaas committed
262
    hints.ai_flags = ai_flags;
263
264
    if (!conf->host && !conf->port) {
	/* getaddrinfo() doesn't like host and port to be NULL */
venaas's avatar
venaas committed
265
	if (getaddrinfo(conf->host, conf->pdef->portdefault, &hints, &addrinfo)) {
266
267
268
269
270
271
272
273
274
275
276
	    debug(DBG_WARN, "resolvepeer: can't resolve (null) port (null)");
	    return 0;
	}
	for (res = addrinfo; res; res = res->ai_next) {
	    switch (res->ai_family) {
	    case AF_INET:
		((struct sockaddr_in *)res->ai_addr)->sin_port = 0;
		break;
	    case AF_INET6:
		((struct sockaddr_in6 *)res->ai_addr)->sin6_port = 0;
		break;
277
	    }
278
279
280
281
282
	}
    } else {
	if (slash)
	    hints.ai_flags |= AI_NUMERICHOST;
	if (getaddrinfo(conf->host, conf->port, &hints, &addrinfo)) {
283
	    debug(DBG_WARN, "resolvepeer: can't resolve %s port %s", conf->host ? conf->host : "(null)", conf->port ? conf->port : "(null)");
284
285
	    return 0;
	}
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
	if (slash) {
	    *slash = '/';
	    switch (addrinfo->ai_family) {
	    case AF_INET:
		if (plen > 32) {
		    debug(DBG_WARN, "resolvepeer: prefix length must be <= 32 in %s", conf->host);
		    freeaddrinfo(addrinfo);
		    return 0;
		}
		break;
	    case AF_INET6:
		break;
	    default:
		debug(DBG_WARN, "resolvepeer: prefix must be IPv4 or IPv6 in %s", conf->host);
		freeaddrinfo(addrinfo);
		return 0;
	    }
	    conf->prefixlen = plen;
	} else
	    conf->prefixlen = 255;
    }
venaas's avatar
venaas committed
307
308
309
    if (conf->addrinfo)
	freeaddrinfo(conf->addrinfo);
    conf->addrinfo = addrinfo;
venaas's avatar
 
venaas committed
310
311
312
    return 1;
}	  

313
314
int bindtoaddr(struct addrinfo *addrinfo, int family, int reuse, int v6only) {
    int s, on = 1;
venaas's avatar
 
venaas committed
315
    struct addrinfo *res;
316
    
317
    for (res = addrinfo; res; res = res->ai_next) {
318
319
	if (family != AF_UNSPEC && family != res->ai_family)
	    continue;
venaas's avatar
 
venaas committed
320
321
        s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
        if (s < 0) {
322
            debug(DBG_WARN, "bindtoaddr: socket failed");
venaas's avatar
 
venaas committed
323
324
            continue;
        }
325
326
327
328
329
330
331
332
333
334
	if (reuse)
	    setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
#ifdef IPV6_V6ONLY
	if (v6only)
	    setsockopt(s, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on));
#endif		

	if (!bind(s, res->ai_addr, res->ai_addrlen))
	    return s;
	debug(DBG_WARN, "bindtoaddr: bind failed");
venaas's avatar
 
venaas committed
335
336
        close(s);
    }
337
    return -1;
venaas's avatar
 
venaas committed
338
339
}	  

340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
char *parsehostport(char *s, struct clsrvconf *conf, char *default_port) {
    char *p, *field;
    int ipv6 = 0;

    p = s;
    /* allow literal addresses and port, e.g. [2001:db8::1]:1812 */
    if (*p == '[') {
	p++;
	field = p;
	for (; *p && *p != ']' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
	if (*p != ']')
	    debugx(1, DBG_ERR, "no ] matching initial [");
	ipv6 = 1;
    } else {
	field = p;
	for (; *p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n'; p++);
    }
    if (field == p)
	debugx(1, DBG_ERR, "missing host/address");

    conf->host = stringcopy(field, p - field);
    if (ipv6) {
	p++;
	if (*p && *p != ':' && *p != ' ' && *p != '\t' && *p != '\n')
	    debugx(1, DBG_ERR, "unexpected character after ]");
    }
    if (*p == ':') {
	    /* port number or service name is specified */;
	    field = ++p;
	    for (; *p && *p != ' ' && *p != '\t' && *p != '\n'; p++);
	    if (field == p)
		debugx(1, DBG_ERR, "syntax error, : but no following port");
	    conf->port = stringcopy(field, p - field);
    } else
	conf->port = default_port ? stringcopy(default_port, 0) : NULL;
    return p;
}

venaas's avatar
venaas committed
378
struct clsrvconf *resolve_hostport(uint8_t type, char *lconf, char *default_port) {
379
380
381
382
383
384
385
    struct clsrvconf *conf;

    conf = malloc(sizeof(struct clsrvconf));
    if (!conf)
	debugx(1, DBG_ERR, "malloc failed");
    memset(conf, 0, sizeof(struct clsrvconf));
    conf->type = type;
venaas's avatar
venaas committed
386
    conf->pdef = &protodefs[conf->type];
387
388
389
390
391
392
393
394
395
    if (lconf) {
	parsehostport(lconf, conf, default_port);
	if (!strcmp(conf->host, "*")) {
	    free(conf->host);
	    conf->host = NULL;
	}
    } else
	conf->port = default_port ? stringcopy(default_port, 0) : NULL;
    if (!resolvepeer(conf, AI_PASSIVE))
396
	debugx(1, DBG_ERR, "failed to resolve host %s port %s, exiting", conf->host ? conf->host : "(null)", conf->port ? conf->port : "(null)");
397
398
399
    return conf;
}

400
401
402
403
404
405
406
407
void freeclsrvres(struct clsrvconf *res) {
    free(res->host);
    free(res->port);
    if (res->addrinfo)
	freeaddrinfo(res->addrinfo);
    free(res);
}

venaas's avatar
venaas committed
408
int connecttcp(struct addrinfo *addrinfo, struct addrinfo *src) {
409
    int s;
venaas's avatar
venaas committed
410
    struct addrinfo *res;
411
412

    s = -1;
venaas's avatar
venaas committed
413
    for (res = addrinfo; res; res = res->ai_next) {
venaas's avatar
venaas committed
414
	s = bindtoaddr(src, res->ai_family, 1, 1);
venaas's avatar
venaas committed
415
        if (s < 0) {
416
            debug(DBG_WARN, "connecttoserver: socket failed");
venaas's avatar
venaas committed
417
418
            continue;
        }
419
420
421
        if (connect(s, res->ai_addr, res->ai_addrlen) == 0)
            break;
        debug(DBG_WARN, "connecttoserver: connect failed");
venaas's avatar
venaas committed
422
        close(s);
423
        s = -1;
venaas's avatar
venaas committed
424
    }
425
    return s;
venaas's avatar
venaas committed
426
427
}	  

428
429
430
431
432
433
434
435
436
437
438
439
/* returns 1 if the len first bits are equal, else 0 */
int prefixmatch(void *a1, void *a2, uint8_t len) {
    static uint8_t mask[] = { 0, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe };
    int r, l = len / 8;
    if (l && memcmp(a1, a2, l))
	return 0;
    r = len % 8;
    if (!r)
	return 1;
    return (((uint8_t *)a1)[l] & mask[r]) == (((uint8_t *)a2)[l] & mask[r]);
}

440
/* check if conf has matching address */
venaas's avatar
venaas committed
441
struct clsrvconf *checkconfaddr(uint8_t type, struct sockaddr *addr, struct clsrvconf *conf) {
venaas's avatar
venaas committed
442
443
444
    struct sockaddr_in6 *sa6 = NULL;
    struct in_addr *a4 = NULL;
    struct addrinfo *res;
venaas's avatar
venaas committed
445
    
venaas's avatar
venaas committed
446
447
    if (addr->sa_family == AF_INET6) {
        sa6 = (struct sockaddr_in6 *)addr;
448
        if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
venaas's avatar
venaas committed
449
            a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
450
451
	    sa6 = NULL;
	}
venaas's avatar
venaas committed
452
453
454
    } else
	a4 = &((struct sockaddr_in *)addr)->sin_addr;

455
456
457
458
459
460
461
    if (conf->type == type) {
	if (conf->prefixlen == 255) {
	    for (res = conf->addrinfo; res; res = res->ai_next)
		if ((a4 && res->ai_family == AF_INET &&
		     !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
		    (sa6 && res->ai_family == AF_INET6 &&
		     !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16)))
venaas's avatar
venaas committed
462
		    return conf;
463
464
465
466
467
468
469
470
	} else {
	    res = conf->addrinfo;
	    if (res &&
		((a4 && res->ai_family == AF_INET &&
		  prefixmatch(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, conf->prefixlen)) ||
		 (sa6 && res->ai_family == AF_INET6 &&
		  prefixmatch(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, conf->prefixlen))))
		return conf;
471
	}
venaas's avatar
venaas committed
472
    }
473
474
475
476
    return NULL;
}

/* returns next config with matching address, or NULL */
venaas's avatar
venaas committed
477
struct clsrvconf *find_conf(uint8_t type, struct sockaddr *addr, struct list *confs, struct list_node **cur) {
478
479
480
481
482
483
484
485
486
487
488
489
490
491
    struct sockaddr_in6 *sa6 = NULL;
    struct in_addr *a4 = NULL;
    struct addrinfo *res;
    struct list_node *entry;
    struct clsrvconf *conf;
    
    if (addr->sa_family == AF_INET6) {
        sa6 = (struct sockaddr_in6 *)addr;
        if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) {
            a4 = (struct in_addr *)&sa6->sin6_addr.s6_addr[12];
	    sa6 = NULL;
	}
    } else
	a4 = &((struct sockaddr_in *)addr)->sin_addr;
venaas's avatar
venaas committed
492

venaas's avatar
venaas committed
493
    for (entry = (cur && *cur ? list_next(*cur) : list_first(confs)); entry; entry = list_next(entry)) {
venaas's avatar
venaas committed
494
	conf = (struct clsrvconf *)entry->data;
495
496
497
498
499
500
	if (conf->type == type) {
	    if (conf->prefixlen == 255) {
		for (res = conf->addrinfo; res; res = res->ai_next)
		    if ((a4 && res->ai_family == AF_INET &&
			 !memcmp(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, 4)) ||
			(sa6 && res->ai_family == AF_INET6 &&
501
502
503
			 !memcmp(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, 16))) {
			if (cur)
			    *cur = entry;
504
			return conf;
505
		    }
506
507
508
509
510
511
	    } else {
		res = conf->addrinfo;
		if (res &&
		    ((a4 && res->ai_family == AF_INET &&
		      prefixmatch(a4, &((struct sockaddr_in *)res->ai_addr)->sin_addr, conf->prefixlen)) ||
		     (sa6 && res->ai_family == AF_INET6 &&
512
513
514
		      prefixmatch(&sa6->sin6_addr, &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr, conf->prefixlen)))) {
		    if (cur)
			*cur = entry;
venaas's avatar
venaas committed
515
		    return conf;
516
		}
517
518
	    }
	}
venaas's avatar
venaas committed
519
    }    
venaas's avatar
venaas committed
520
521
522
    return NULL;
}

venaas's avatar
venaas committed
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
/* returns next config of given type, or NULL */
struct clsrvconf *find_conf_type(uint8_t type, struct list *confs, struct list_node **cur) {
    struct list_node *entry;
    struct clsrvconf *conf;
    
    for (entry = (cur && *cur ? list_next(*cur) : list_first(confs)); entry; entry = list_next(entry)) {
	conf = (struct clsrvconf *)entry->data;
	if (conf->type == type) {
	    if (cur)
		*cur = entry;
	    return conf;
	}
    }    
    return NULL;
}

539
struct replyq *newreplyq() {
540
541
542
543
544
    struct replyq *replyq;
    
    replyq = malloc(sizeof(struct replyq));
    if (!replyq)
	debugx(1, DBG_ERR, "malloc failed");
545
    replyq->replies = list_create();
546
547
    if (!replyq->replies)
	debugx(1, DBG_ERR, "malloc failed");
548
549
    pthread_mutex_init(&replyq->mutex, NULL);
    pthread_cond_init(&replyq->cond, NULL);
550
551
552
    return replyq;
}

553
554
555
556
557
558
struct client *addclient(struct clsrvconf *conf) {
    struct client *new = malloc(sizeof(struct client));
    
    if (!new) {
	debug(DBG_ERR, "malloc failed");
	return NULL;
559
560
    }
    if (!conf->clients) {
561
562
563
564
565
	conf->clients = list_create();
	if (!conf->clients) {
	    debug(DBG_ERR, "malloc failed");
	    return NULL;
	}
566
    }
567
568
569
    
    memset(new, 0, sizeof(struct client));
    new->conf = conf;
venaas's avatar
venaas committed
570
    new->replyq = conf->type == RAD_UDP ? udp_server_replyq : newreplyq();
571
572
573
574
575
576

    list_push(conf->clients, new);
    return new;
}

void removeclient(struct client *client) {
577
578
    struct list_node *entry;
    
579
580
581
    if (!client || !client->conf->clients)
	return;

582
583
584
585
    pthread_mutex_lock(&client->replyq->mutex);
    for (entry = list_first(client->replyq->replies); entry; entry = list_next(entry))
	free(((struct reply *)entry)->buf);
    list_destroy(client->replyq->replies);
venaas's avatar
venaas committed
586
    pthread_cond_destroy(&client->replyq->cond);
587
    pthread_mutex_unlock(&client->replyq->mutex);
venaas's avatar
venaas committed
588
    pthread_mutex_destroy(&client->replyq->mutex);
589
590
    list_removedata(client->conf->clients, client);
    free(client);
591
592
}

593
594
595
596
597
598
599
600
void removeclientrqs(struct client *client) {
    struct list_node *entry;
    struct server *server;
    struct request *rq;
    int i;
    
    for (entry = list_first(srvconfs); entry; entry = list_next(entry)) {
	server = ((struct clsrvconf *)entry->data)->servers;
601
602
	if (!server)
	    continue;
603
604
605
606
607
608
609
610
611
	pthread_mutex_lock(&server->newrq_mutex);
	for (i = 0; i < MAX_REQUESTS; i++) {
	    rq = server->requests + i;
	    if (rq->from == client)
		rq->from = NULL;
	}
	pthread_mutex_unlock(&server->newrq_mutex);
    }
}
venaas's avatar
venaas committed
612
613

void freeserver(struct server *server, uint8_t destroymutex) {
614
615
    struct request *rq, *end;

venaas's avatar
venaas committed
616
617
    if (!server)
	return;
618
619
620
621
622
623
624

    if(server->requests) {
	rq = server->requests;
	for (end = rq + MAX_REQUESTS; rq < end; rq++)
	    freerqdata(rq);
	free(server->requests);
    }
625
    free(server->dynamiclookuparg);
venaas's avatar
venaas committed
626
627
628
629
630
631
632
633
634
635
    if (destroymutex) {
	pthread_mutex_destroy(&server->lock);
	pthread_cond_destroy(&server->newrq_cond);
	pthread_mutex_destroy(&server->newrq_mutex);
    }
    free(server);
}

int addserver(struct clsrvconf *conf) {
    struct clsrvconf *res;
venaas's avatar
venaas committed
636
    uint8_t type;
637
    
venaas's avatar
venaas committed
638
639
640
641
    if (conf->servers) {
	debug(DBG_ERR, "addserver: currently works with just one server per conf");
	return 0;
    }
642
    conf->servers = malloc(sizeof(struct server));
venaas's avatar
venaas committed
643
644
645
646
    if (!conf->servers) {
	debug(DBG_ERR, "malloc failed");
	return 0;
    }
647
648
649
    memset(conf->servers, 0, sizeof(struct server));
    conf->servers->conf = conf;

venaas's avatar
venaas committed
650
651
652
653
654
655
656
    type = conf->type;
    if (type == RAD_DTLS)
	type = RAD_UDP;
    
    if (!srcprotores[type]) {
	res = resolve_hostport(type, *conf->pdef->srcaddrport, NULL);
	srcprotores[type] = res->addrinfo;
venaas's avatar
venaas committed
657
658
659
660
	res->addrinfo = NULL;
	freeclsrvres(res);
    }

venaas's avatar
venaas committed
661
    if (type == RAD_UDP) {
662
663
664
	switch (conf->addrinfo->ai_family) {
	case AF_INET:
	    if (udp_client4_sock < 0) {
venaas's avatar
venaas committed
665
		udp_client4_sock = bindtoaddr(srcprotores[RAD_UDP], AF_INET, 0, 1);
666
667
668
669
		if (udp_client4_sock < 0)
		    debugx(1, DBG_ERR, "addserver: failed to create client socket for server %s", conf->host);
	    }
	    conf->servers->sock = udp_client4_sock;
670
	    break;
671
672
	case AF_INET6:
	    if (udp_client6_sock < 0) {
venaas's avatar
venaas committed
673
		udp_client6_sock = bindtoaddr(srcprotores[RAD_UDP], AF_INET6, 0, 1);
674
675
676
677
		if (udp_client6_sock < 0)
		    debugx(1, DBG_ERR, "addserver: failed to create client socket for server %s", conf->host);
	    }
	    conf->servers->sock = udp_client6_sock;
678
	    break;
679
680
681
682
	default:
	    debugx(1, DBG_ERR, "addserver: unsupported address family");
	}
	
venaas's avatar
venaas committed
683
    } else
684
685
	conf->servers->sock = -1;
    
686
    conf->servers->requests = calloc(MAX_REQUESTS, sizeof(struct request));
venaas's avatar
venaas committed
687
688
689
690
691
692
693
694
    if (!conf->servers->requests) {
	debug(DBG_ERR, "malloc failed");
	goto errexit;
    }
    if (pthread_mutex_init(&conf->servers->lock, NULL)) {
	debug(DBG_ERR, "mutex init failed");
	goto errexit;
    }
695
    conf->servers->newrq = 0;
venaas's avatar
venaas committed
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
    if (pthread_mutex_init(&conf->servers->newrq_mutex, NULL)) {
	debug(DBG_ERR, "mutex init failed");
	pthread_mutex_destroy(&conf->servers->lock);
	goto errexit;
    }
    if (pthread_cond_init(&conf->servers->newrq_cond, NULL)) {
	debug(DBG_ERR, "mutex init failed");
	pthread_mutex_destroy(&conf->servers->newrq_mutex);
	pthread_mutex_destroy(&conf->servers->lock);
	goto errexit;
    }

    return 1;
    
 errexit:
    freeserver(conf->servers, 0);
    conf->servers = NULL;
    return 0;
714
715
}

716
/* exactly one of client and server must be non-NULL */
venaas's avatar
venaas committed
717
/* should probably take peer list (client(s) or server(s)) as argument instead */
venaas's avatar
 
venaas committed
718
719
/* if *peer == NULL we return who we received from, else require it to be from peer */
/* return from in sa if not NULL */
720
unsigned char *radudpget(int s, struct client **client, struct server **server, struct sockaddr_storage *sa) {
721
722
723
724
725
726
    int cnt, len;
    unsigned char buf[4], *rad;
    struct sockaddr_storage from;
    socklen_t fromlen = sizeof(from);
    struct clsrvconf *p;
    struct list_node *node;
727
    fd_set readfds;
728
729
    
    for (;;) {
730
731
732
733
	FD_ZERO(&readfds);
        FD_SET(s, &readfds);
	if (select(s + 1, &readfds, NULL, NULL, NULL) < 1)
	    continue;
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
	cnt = recvfrom(s, buf, 4, MSG_PEEK, (struct sockaddr *)&from, &fromlen);
	if (cnt == -1) {
	    debug(DBG_WARN, "radudpget: recv failed");
	    continue;
	}

	if (client)
	    if (*client)
		p = checkconfaddr(RAD_UDP, (struct sockaddr *)&from, (*client)->conf);
	    else
		p = find_conf(RAD_UDP, (struct sockaddr *)&from, clconfs, NULL);
	else
	    if (*server)
		p = checkconfaddr(RAD_UDP, (struct sockaddr *)&from, (*server)->conf);
	    else
		p = find_conf(RAD_UDP, (struct sockaddr *)&from, srvconfs, NULL);

	if (!p) {
	    debug(DBG_WARN, "radudpget: got packet from wrong or unknown UDP peer %s, ignoring", addr2string((struct sockaddr *)&from, fromlen));
	    recv(s, buf, 4, 0);
	    continue;
	}
	
	len = RADLEN(buf);
	if (len < 20) {
	    debug(DBG_WARN, "radudpget: length too small");
	    recv(s, buf, 4, 0);
	    continue;
	}
	
	rad = malloc(len);
	if (!rad) {
	    debug(DBG_ERR, "radudpget: malloc failed");
	    recv(s, buf, 4, 0);
	    continue;
	}
	
	cnt = recv(s, rad, len, MSG_TRUNC);
	debug(DBG_DBG, "radudpget: got %d bytes from %s", cnt, addr2string((struct sockaddr *)&from, fromlen));

	if (cnt < len) {
	    debug(DBG_WARN, "radudpget: packet smaller than length field in radius header");
	    free(rad);
	    continue;
	}
	
	if (cnt > len)
	    debug(DBG_DBG, "radudpget: packet was padded with %d bytes", cnt - len);

	if (client && !*client) {
	    node = list_first(p->clients);
	    *client = node ? (struct client *)node->data : addclient(p);
	    if (!*client) {
		free(rad);
		continue;
	    }
	} else if (server && !*server)
	    *server = p->servers;
	
	break;
    }
    if (sa)
	*sa = from;
    return rad;
}

800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
int subjectaltnameaddr(X509 *cert, int family, struct in6_addr *addr) {
    int loc, i, l, n, r = 0;
    char *v;
    X509_EXTENSION *ex;
    STACK_OF(GENERAL_NAME) *alt;
    GENERAL_NAME *gn;
    
    debug(DBG_DBG, "subjectaltnameaddr");
    
    loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
    if (loc < 0)
	return r;
    
    ex = X509_get_ext(cert, loc);
    alt = X509V3_EXT_d2i(ex);
    if (!alt)
	return r;
    
    n = sk_GENERAL_NAME_num(alt);
    for (i = 0; i < n; i++) {
	gn = sk_GENERAL_NAME_value(alt, i);
	if (gn->type != GEN_IPADD)
	    continue;
	r = -1;
	v = (char *)ASN1_STRING_data(gn->d.ia5);
	l = ASN1_STRING_length(gn->d.ia5);
	if (((family == AF_INET && l == sizeof(struct in_addr)) || (family == AF_INET6 && l == sizeof(struct in6_addr)))
	    && !memcmp(v, &addr, l)) {
	    r = 1;
	    break;
	}
    }
    GENERAL_NAMES_free(alt);
    return r;
}

venaas's avatar
venaas committed
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
int cnregexp(X509 *cert, char *exact, regex_t *regex) {
    int loc, l;
    char *v, *s;
    X509_NAME *nm;
    X509_NAME_ENTRY *e;
    ASN1_STRING *t;

    nm = X509_get_subject_name(cert);
    loc = -1;
    for (;;) {
	loc = X509_NAME_get_index_by_NID(nm, NID_commonName, loc);
	if (loc == -1)
	    break;
	e = X509_NAME_get_entry(nm, loc);
	t = X509_NAME_ENTRY_get_data(e);
	v = (char *) ASN1_STRING_data(t);
	l = ASN1_STRING_length(t);
	if (l < 0)
	    continue;
	if (exact) {
	    if (l == strlen(exact) && !strncasecmp(exact, v, l))
		return 1;
	} else {
	    s = stringcopy((char *)v, l);
	    if (!s) {
		debug(DBG_ERR, "malloc failed");
		continue;
	    }
	    if (regexec(regex, s, 0, NULL, 0)) {
		free(s);
		continue;
	    }
	    free(s);
	    return 1;
	}
    }
    return 0;
}

875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
int subjectaltnameregexp(X509 *cert, int type, char *exact,  regex_t *regex) {
    int loc, i, l, n, r = 0;
    char *s, *v;
    X509_EXTENSION *ex;
    STACK_OF(GENERAL_NAME) *alt;
    GENERAL_NAME *gn;
    
    debug(DBG_DBG, "subjectaltnameregexp");
    
    loc = X509_get_ext_by_NID(cert, NID_subject_alt_name, -1);
    if (loc < 0)
	return r;
    
    ex = X509_get_ext(cert, loc);
    alt = X509V3_EXT_d2i(ex);
    if (!alt)
	return r;
    
    n = sk_GENERAL_NAME_num(alt);
    for (i = 0; i < n; i++) {
	gn = sk_GENERAL_NAME_value(alt, i);
	if (gn->type != type)
	    continue;
	r = -1;
	v = (char *)ASN1_STRING_data(gn->d.ia5);
	l = ASN1_STRING_length(gn->d.ia5);
	if (l <= 0)
	    continue;
#ifdef DEBUG
	printfchars(NULL, gn->type == GEN_DNS ? "dns" : "uri", NULL, v, l);
#endif	
	if (exact) {
	    if (memcmp(v, exact, l))
		continue;
	} else {
	    s = stringcopy((char *)v, l);
	    if (!s) {
		debug(DBG_ERR, "malloc failed");
		continue;
	    }
	    if (regexec(regex, s, 0, NULL, 0)) {
		free(s);
		continue;
	    }
	    free(s);
	}
	r = 1;
	break;
    }
    GENERAL_NAMES_free(alt);
    return r;
}

venaas's avatar
venaas committed
928
X509 *verifytlscert(SSL *ssl) {
929
930
    X509 *cert;
    unsigned long error;
931
    
venaas's avatar
venaas committed
932
    if (SSL_get_verify_result(ssl) != X509_V_OK) {
venaas's avatar
venaas committed
933
	debug(DBG_ERR, "verifytlscert: basic validation failed");
934
	while ((error = ERR_get_error()))
venaas's avatar
venaas committed
935
936
	    debug(DBG_ERR, "verifytlscert: TLS: %s", ERR_error_string(error, NULL));
	return NULL;
937
    }
938

venaas's avatar
venaas committed
939
    cert = SSL_get_peer_certificate(ssl);
venaas's avatar
venaas committed
940
941
942
943
944
945
946
947
948
949
    if (!cert)
	debug(DBG_ERR, "verifytlscert: failed to obtain certificate");
    return cert;
}
    
int verifyconfcert(X509 *cert, struct clsrvconf *conf) {
    int r;
    uint8_t type = 0; /* 0 for DNS, AF_INET for IPv4, AF_INET6 for IPv6 */
    struct in6_addr addr;
    
950
    if (conf->certnamecheck && conf->prefixlen == 255) {
951
952
953
954
955
956
957
958
	if (inet_pton(AF_INET, conf->host, &addr))
	    type = AF_INET;
	else if (inet_pton(AF_INET6, conf->host, &addr))
	    type = AF_INET6;

	r = type ? subjectaltnameaddr(cert, type, &addr) : subjectaltnameregexp(cert, GEN_DNS, conf->host, NULL);
	if (r) {
	    if (r < 0) {
venaas's avatar
venaas committed
959
		debug(DBG_WARN, "verifyconfcert: No subjectaltname matching %s %s", type ? "address" : "host", conf->host);
venaas's avatar
venaas committed
960
		return 0;
961
	    }
venaas's avatar
venaas committed
962
	    debug(DBG_DBG, "verifyconfcert: Found subjectaltname matching %s %s", type ? "address" : "host", conf->host);
963
	} else {
venaas's avatar
venaas committed
964
	    if (!cnregexp(cert, conf->host, NULL)) {
venaas's avatar
venaas committed
965
		debug(DBG_WARN, "verifyconfcert: cn not matching host %s", conf->host);
venaas's avatar
venaas committed
966
		return 0;
venaas's avatar
venaas committed
967
	    }		
venaas's avatar
venaas committed
968
	    debug(DBG_DBG, "verifyconfcert: Found cn matching host %s", conf->host);
venaas's avatar
venaas committed
969
970
971
972
	}
    }
    if (conf->certcnregex) {
	if (cnregexp(cert, NULL, conf->certcnregex) < 1) {
venaas's avatar
venaas committed
973
	    debug(DBG_WARN, "verifyconfcert: CN not matching regex");
venaas's avatar
venaas committed
974
	    return 0;
975
	}
venaas's avatar
venaas committed
976
	debug(DBG_DBG, "verifyconfcert: CN matching regex");
977
978
    }
    if (conf->certuriregex) {
venaas's avatar
venaas committed
979
	if (subjectaltnameregexp(cert, GEN_URI, NULL, conf->certuriregex) < 1) {
venaas's avatar
venaas committed
980
	    debug(DBG_WARN, "verifyconfcert: subjectaltname URI not matching regex");
venaas's avatar
venaas committed
981
	    return 0;
982
	}
venaas's avatar
venaas committed
983
	debug(DBG_DBG, "verifyconfcert: subjectaltname URI matching regex");
984
    }
985
    return 1;
986
987
}

988
int tlsconnect(struct server *server, struct timeval *when, int timeout, char *text) {
venaas's avatar
venaas committed
989
990
    struct timeval now;
    time_t elapsed;
venaas's avatar
venaas committed
991
    X509 *cert;
992
    unsigned long error;
venaas's avatar
venaas committed
993
    
venaas's avatar
venaas committed
994
    debug(DBG_DBG, "tlsconnect: called from %s", text);
995
996
    pthread_mutex_lock(&server->lock);
    if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
venaas's avatar
 
venaas committed
997
	/* already reconnected, nothing to do */
venaas's avatar
venaas committed
998
	debug(DBG_DBG, "tlsconnect(%s): seems already reconnected", text);
999
	pthread_mutex_unlock(&server->lock);
1000
	return 1;
venaas's avatar
 
venaas committed
1001
1002
1003
    }

    for (;;) {
venaas's avatar
venaas committed
1004
	gettimeofday(&now, NULL);
1005
	elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
1006
1007
1008
1009
1010
	if (timeout && server->lastconnecttry.tv_sec && elapsed > timeout) {
	    debug(DBG_DBG, "tlsconnect: timeout");
	    if (server->sock >= 0)
		close(server->sock);
	    SSL_free(server->ssl);
1011
	    server->ssl = NULL;
1012
1013
1014
	    pthread_mutex_unlock(&server->lock);
	    return 0;
	}
1015
1016
	if (server->connectionok) {
	    server->connectionok = 0;
1017
1018
1019
1020
	    sleep(2);
	} else if (elapsed < 1)
	    sleep(2);
	else if (elapsed < 60) {
venaas's avatar
venaas committed
1021
	    debug(DBG_INFO, "tlsconnect: sleeping %lds", elapsed);
venaas's avatar
venaas committed
1022
	    sleep(elapsed);
venaas's avatar
venaas committed
1023
	} else if (elapsed < 100000) {
1024
1025
	    debug(DBG_INFO, "tlsconnect: sleeping %ds", 60);
	    sleep(60);
venaas's avatar
venaas committed
1026
	} else
venaas's avatar
venaas committed
1027
	    server->lastconnecttry.tv_sec = now.tv_sec;  /* no sleep at startup */
venaas's avatar
venaas committed
1028
	debug(DBG_WARN, "tlsconnect: trying to open TLS connection to %s port %s", server->conf->host, server->conf->port);
1029
1030
	if (server->sock >= 0)
	    close(server->sock);
venaas's avatar
venaas committed
1031
	if ((server->sock = connecttcp(server->conf->addrinfo, srcprotores[RAD_TLS])) < 0) {
1032
	    debug(DBG_ERR, "tlsconnect: connecttcp failed");
venaas's avatar
venaas committed
1033
	    continue;
1034
1035
	}
	
venaas's avatar
venaas committed
1036
	SSL_free(server->ssl);
venaas's avatar
venaas committed
1037
	server->ssl = SSL_new(server->conf->ssl_ctx);
venaas's avatar
venaas committed
1038
	SSL_set_fd(server->ssl, server->sock);
1039
1040
1041
	if (SSL_connect(server->ssl) <= 0) {
	    while ((error = ERR_get_error()))
		debug(DBG_ERR, "tlsconnect: TLS: %s", ERR_error_string(error, NULL));
venaas's avatar
venaas committed
1042
	    continue;
1043
	}
venaas's avatar
venaas committed
1044
1045
1046
1047
1048
	cert = verifytlscert(server->ssl);
	if (!cert)
	    continue;
	if (verifyconfcert(cert, server->conf)) {
	    X509_free(cert);
venaas's avatar
 
venaas committed
1049
	    break;
venaas's avatar
venaas committed
1050
1051
	}
	X509_free(cert);
venaas's avatar
 
venaas committed
1052
    }
venaas's avatar
venaas committed
1053
    debug(DBG_WARN, "tlsconnect: TLS connection to %s port %s up", server->conf->host, server->conf->port);
venaas's avatar
venaas committed
1054
    gettimeofday(&server->lastconnecttry, NULL);
1055
    pthread_mutex_unlock(&server->lock);
1056
    return 1;
venaas's avatar
 
venaas committed
1057
1058
}

1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
int dtlsconnect(struct server *server, struct timeval *when, int timeout, char *text) {
    BIO *dummybio, *wbio;
    
    debug(DBG_DBG, "dtlsconnect: called from %s", text);
    server->ssl = SSL_new(server->conf->ssl_ctx);
    SSL_set_connect_state(server->ssl);
    dummybio = BIO_new(BIO_s_mem());
    wbio = BIO_new_dgram(server->sock, BIO_NOCLOSE);
    BIO_dgram_set_peer(wbio, server->conf->addrinfo->ai_addr);
    /* the real rbio will be set by radudpget */
    SSL_set_bio(server->ssl, dummybio, wbio);
    return 1;
}
    
venaas's avatar
venaas committed
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
int tcpconnect(struct server *server, struct timeval *when, int timeout, char *text) {
    struct timeval now;
    time_t elapsed;
    
    debug(DBG_DBG, "tcpconnect: called from %s", text);
    pthread_mutex_lock(&server->lock);
    if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
	/* already reconnected, nothing to do */
	debug(DBG_DBG, "tcpconnect(%s): seems already reconnected", text);
	pthread_mutex_unlock(&server->lock);
	return 1;
    }

    for (;;) {
	gettimeofday(&now, NULL);
	elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
	if (timeout && server->lastconnecttry.tv_sec && elapsed > timeout) {
	    debug(DBG_DBG, "tcpconnect: timeout");
	    if (server->sock >= 0)
		close(server->sock);
	    pthread_mutex_unlock(&server->lock);
	    return 0;
	}
	if (server->connectionok) {
	    server->connectionok = 0;
	    sleep(2);
	} else if (elapsed < 1)
	    sleep(2);
	else if (elapsed < 60) {
	    debug(DBG_INFO, "tcpconnect: sleeping %lds", elapsed);
	    sleep(elapsed);
	} else if (elapsed < 100000) {
	    debug(DBG_INFO, "tcpconnect: sleeping %ds", 60);
	    sleep(60);
	} else
	    server->lastconnecttry.tv_sec = now.tv_sec;  /* no sleep at startup */
	debug(DBG_WARN, "tcpconnect: trying to open TCP connection to %s port %s", server->conf->host, server->conf->port);
	if (server->sock >= 0)
	    close(server->sock);
	if ((server->sock = connecttcp(server->conf->addrinfo, srcprotores[RAD_TCP])) >= 0)
	    break;
	debug(DBG_ERR, "tcpconnect: connecttcp failed");
    }
    debug(DBG_WARN, "tcpconnect: TCP connection to %s port %s up", server->conf->host, server->conf->port);
    gettimeofday(&server->lastconnecttry, NULL);
    pthread_mutex_unlock(&server->lock);
    return 1;
}

1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
/* timeout in seconds, 0 means no timeout (blocking), returns when num bytes have been read, or timeout */
/* returns 0 on timeout, -1 on error and num if ok */
int sslreadtimeout(SSL *ssl, unsigned char *buf, int num, int timeout) {
    int s, ndesc, cnt, len;
    fd_set readfds, writefds;
    struct timeval timer;
    
    s = SSL_get_fd(ssl);
    if (s < 0)
	return -1;
    /* make socket non-blocking? */
    for (len = 0; len < num; len += cnt) {
	FD_ZERO(&readfds);
	FD_SET(s, &readfds);
	writefds = readfds;
	if (timeout) {
	    timer.tv_sec = timeout;
	    timer.tv_usec = 0;
	}
	ndesc = select(s + 1, &readfds, &writefds, NULL, timeout ? &timer : NULL);
	if (ndesc < 1)
	    return ndesc;

	cnt = SSL_read(ssl, buf + len, num - len);
	if (cnt <= 0)
	    switch (SSL_get_error(ssl, cnt)) {
	    case SSL_ERROR_WANT_READ:
	    case SSL_ERROR_WANT_WRITE:
		cnt = 0;
		continue;
	    case SSL_ERROR_ZERO_RETURN:
		/* remote end sent close_notify, send one back */
		SSL_shutdown(ssl);
		/* fall through */
	    default:
		return -1;
	    }
    }
    return num;
}

/* timeout in seconds, 0 means no timeout (blocking) */
unsigned char *radtlsget(SSL *ssl, int timeout) {
venaas's avatar
venaas committed
1165
    int cnt, len;
venaas's avatar
 
venaas committed
1166
1167
1168
    unsigned char buf[4], *rad;

    for (;;) {
1169
1170
1171
1172
	cnt = sslreadtimeout(ssl, buf, 4, timeout);
	if (cnt < 1) {
	    debug(DBG_DBG, cnt ? "radtlsget: connection lost" : "radtlsget: timeout");
	    return NULL;
venaas's avatar
 
venaas committed
1173
1174
1175
1176
1177
	}

	len = RADLEN(buf);
	rad = malloc(len);
	if (!rad) {
1178
	    debug(DBG_ERR, "radtlsget: malloc failed");
venaas's avatar
 
venaas committed
1179
1180
1181
	    continue;
	}
	memcpy(rad, buf, 4);
1182
1183
1184
1185
1186
1187
	
	cnt = sslreadtimeout(ssl, rad + 4, len - 4, timeout);
	if (cnt < 1) {
	    debug(DBG_DBG, cnt ? "radtlsget: connection lost" : "radtlsget: timeout");
	    free(rad);
	    return NULL;
venaas's avatar
 
venaas committed
1188
	}
1189
1190
	
	if (len >= 20)
venaas's avatar
 
venaas committed
1191
1192
1193
	    break;
	
	free(rad);
1194
	debug(DBG_WARN, "radtlsget: packet smaller than minimum radius size");
venaas's avatar
 
venaas committed
1195
1196
    }
    
venaas's avatar
venaas committed
1197
    debug(DBG_DBG, "radtlsget: got %d bytes", len);
venaas's avatar
 
venaas committed
1198
1199
1200
    return rad;
}

1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
/* timeout in seconds, 0 means no timeout (blocking), returns when num bytes have been read, or timeout */
/* returns 0 on timeout, -1 on error and num if ok */
int tcpreadtimeout(int s, unsigned char *buf, int num, int timeout) {
    int ndesc, cnt, len;
    fd_set readfds, writefds;
    struct timeval timer;
    
    if (s < 0)
	return -1;
    /* make socket non-blocking? */
    for (len = 0; len < num; len += cnt) {
	FD_ZERO(&readfds);
	FD_SET(s, &readfds);
	writefds = readfds;
	if (timeout) {
	    timer.tv_sec = timeout;
	    timer.tv_usec = 0;
	}
	ndesc = select(s + 1, &readfds, &writefds, NULL, timeout ? &timer : NULL);
	if (ndesc < 1)
	    return ndesc;

	cnt = read(s, buf + len, num - len);
	if (cnt <= 0)
	    return -1;
    }
    return num;
}

/* timeout in seconds, 0 means no timeout (blocking) */
unsigned char *radtcpget(int s, int timeout) {
    int cnt, len;
    unsigned char buf[4], *rad;

    for (;;) {
	cnt = tcpreadtimeout(s, buf, 4, timeout);
	if (cnt < 1) {
	    debug(DBG_DBG, cnt ? "radtcpget: connection lost" : "radtcpget: timeout");
	    return NULL;
	}

	len = RADLEN(buf);
	rad = malloc(len);
	if (!rad) {
	    debug(DBG_ERR, "radtcpget: malloc failed");
	    continue;
	}
	memcpy(rad, buf, 4);
	
	cnt = tcpreadtimeout(s, rad + 4, len - 4, timeout);
	if (cnt < 1) {
	    debug(DBG_DBG, cnt ? "radtcpget: connection lost" : "radtcpget: timeout");
	    free(rad);
	    return NULL;
	}
	
	if (len >= 20)
	    break;
	
	free(rad);
	debug(DBG_WARN, "radtcpget: packet smaller than minimum radius size");
    }
    
    debug(DBG_DBG, "radtcpget: got %d bytes", len);
    return rad;
}

1268
int clientradputudp(struct server *server, unsigned char *rad) {
venaas's avatar
 
venaas committed
1269
    size_t len;
1270
1271
    struct sockaddr_storage sa;
    struct sockaddr *sap;
1272
    struct clsrvconf *conf = server->conf;
1273
    in_port_t *port = NULL;
venaas's avatar
venaas committed
1274
    
venaas's avatar
 
venaas committed
1275
    len = RADLEN(rad);
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
    
    if (*rad == RAD_Accounting_Request) {
	sap = (struct sockaddr *)&sa;
	memcpy(sap, conf->addrinfo->ai_addr, conf->addrinfo->ai_addrlen);
    } else
	sap = conf->addrinfo->ai_addr;
    
    switch (sap->sa_family) {
    case AF_INET:
	port = &((struct sockaddr_in *)sap)->