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sendchap on ConfigAck
[l2tpns.git] / radius.c
1 // L2TPNS Radius Stuff
2
3 char const *cvs_id_radius = "$Id: radius.c,v 1.30 2005/05/07 08:17:26 bodea Exp $";
4
5 #include <time.h>
6 #include <stdio.h>
7 #include <sys/types.h>
8 #include <sys/socket.h>
9 #include <malloc.h>
10 #include <string.h>
11 #include <fcntl.h>
12 #include <arpa/inet.h>
13 #include <ctype.h>
14 #include <netinet/in.h>
15 #include "md5.h"
16 #include "constants.h"
17 #include "l2tpns.h"
18 #include "plugin.h"
19 #include "util.h"
20
21 extern radiust *radius;
22 extern sessiont *session;
23 extern tunnelt *tunnel;
24 extern configt *config;
25 extern int *radfds;
26 extern ip_filtert *ip_filters;
27
28 // Set up socket for radius requests
29 void initrad(void)
30 {
31 int i;
32 LOG(3, 0, 0, "Creating %d sockets for RADIUS queries\n", config->num_radfds);
33 radfds = calloc(sizeof(int), config->num_radfds);
34 for (i = 0; i < config->num_radfds; i++)
35 {
36 int flags;
37 radfds[i] = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
38 flags = fcntl(radfds[i], F_GETFL, 0);
39 fcntl(radfds[i], F_SETFL, flags | O_NONBLOCK);
40 }
41 }
42
43 void radiusclear(uint16_t r, sessionidt s)
44 {
45 if (s) sess_local[s].radius = 0;
46 memset(&radius[r], 0, sizeof(radius[r])); // radius[r].state = RADIUSNULL;
47 }
48
49 static uint16_t get_free_radius()
50 {
51 int count;
52 static uint32_t next_radius_id = 0;
53
54 for (count = MAXRADIUS; count > 0 ; --count)
55 {
56 ++next_radius_id; // Find the next ID to check.
57 if (next_radius_id >= MAXRADIUS)
58 next_radius_id = 1;
59
60 if (radius[next_radius_id].state == RADIUSNULL)
61 {
62 return next_radius_id;
63 }
64 }
65
66 LOG(0, 0, 0, "Can't find a free radius session! This is very bad!\n");
67 return 0;
68 }
69
70 uint16_t radiusnew(sessionidt s)
71 {
72 uint16_t r = sess_local[s].radius;
73
74 /* re-use */
75 if (r)
76 {
77 LOG(3, s, session[s].tunnel, "Re-used radius %d\n", r);
78 return r;
79 }
80
81 if (!(r = get_free_radius()))
82 {
83 LOG(1, s, session[s].tunnel, "No free RADIUS sessions\n");
84 STAT(radius_overflow);
85 return 0;
86 };
87
88 memset(&radius[r], 0, sizeof(radius[r]));
89 sess_local[s].radius = r;
90 radius[r].session = s;
91 radius[r].state = RADIUSWAIT;
92 radius[r].retry = TIME + 1200; // Wait at least 120 seconds to re-claim this.
93
94 random_data(radius[r].auth, sizeof(radius[r].auth));
95
96 LOG(3, s, session[s].tunnel, "Allocated radius %d\n", r);
97 return r;
98 }
99
100 // Send a RADIUS request
101 void radiussend(uint16_t r, uint8_t state)
102 {
103 struct sockaddr_in addr;
104 uint8_t b[4096]; // RADIUS packet
105 char pass[129];
106 int pl;
107 uint8_t *p;
108 sessionidt s;
109
110 CSTAT(radiussend);
111
112 s = radius[r].session;
113 if (!config->numradiusservers)
114 {
115 LOG(0, s, session[s].tunnel, "No RADIUS servers\n");
116 return;
117 }
118 if (!*config->radiussecret)
119 {
120 LOG(0, s, session[s].tunnel, "No RADIUS secret\n");
121 return;
122 }
123
124 if (state != RADIUSAUTH && !config->radius_accounting)
125 {
126 // Radius accounting is turned off
127 radiusclear(r, s);
128 return;
129 }
130
131 if (radius[r].state != state)
132 radius[r].try = 0;
133
134 radius[r].state = state;
135 radius[r].retry = backoff(radius[r].try++);
136 LOG(4, s, session[s].tunnel, "Send RADIUS id %d sock %d state %s try %d\n",
137 r >> RADIUS_SHIFT, r & RADIUS_MASK,
138 radius_state(radius[r].state), radius[r].try);
139
140 if (radius[r].try > config->numradiusservers * 2)
141 {
142 if (s)
143 {
144 if (state == RADIUSAUTH)
145 sessionshutdown(s, "RADIUS timeout.", 3, 0);
146 else
147 {
148 LOG(1, s, session[s].tunnel, "RADIUS timeout, but in state %s so don't timeout session\n",
149 radius_state(state));
150 radiusclear(r, s);
151 }
152 STAT(radius_timeout);
153 }
154 else
155 {
156 STAT(radius_retries);
157 radius[r].state = RADIUSWAIT;
158 radius[r].retry = 100;
159 }
160 return;
161 }
162 // contruct RADIUS access request
163 switch (state)
164 {
165 case RADIUSAUTH:
166 b[0] = 1; // access request
167 break;
168 case RADIUSSTART:
169 case RADIUSSTOP:
170 case RADIUSINTERIM:
171 b[0] = 4; // accounting request
172 break;
173 default:
174 LOG(0, 0, 0, "Unknown radius state %d\n", state);
175 }
176 b[1] = r >> RADIUS_SHIFT; // identifier
177 memcpy(b + 4, radius[r].auth, 16);
178 p = b + 20;
179 if (s)
180 {
181 *p = 1; // user name
182 p[1] = strlen(session[s].user) + 2;
183 strcpy(p + 2, session[s].user);
184 p += p[1];
185 }
186 if (state == RADIUSAUTH)
187 {
188 if (radius[r].chap)
189 {
190 *p = 3; // CHAP password
191 p[1] = 19; // length
192 p[2] = radius[r].id; // ID
193 memcpy(p + 3, radius[r].pass, 16); // response from CHAP request
194 p += p[1];
195 *p = 60; // CHAP Challenge
196 p[1] = 18; // length
197 memcpy(p + 2, radius[r].auth, 16);
198 p += p[1];
199 }
200 else
201 {
202 strcpy(pass, radius[r].pass);
203 pl = strlen(pass);
204 while (pl & 15)
205 pass[pl++] = 0; // pad
206 if (pl)
207 { // encrypt
208 hasht hash;
209 int p = 0;
210 while (p < pl)
211 {
212 MD5_CTX ctx;
213 MD5Init(&ctx);
214 MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret));
215 if (p)
216 MD5Update(&ctx, pass + p - 16, 16);
217 else
218 MD5Update(&ctx, radius[r].auth, 16);
219 MD5Final(hash, &ctx);
220 do
221 {
222 pass[p] ^= hash[p & 15];
223 p++;
224 }
225 while (p & 15);
226 }
227 }
228 *p = 2; // password
229 p[1] = pl + 2;
230 if (pl)
231 memcpy(p + 2, pass, pl);
232 p += p[1];
233 }
234 }
235 else if (state == RADIUSSTART || state == RADIUSSTOP || state == RADIUSINTERIM)
236 { // accounting
237 *p = 40; // accounting type
238 p[1] = 6;
239 *(uint32_t *) (p + 2) = htonl(state - RADIUSSTART + 1); // start=1, stop=2, interim=3
240 p += p[1];
241 if (s)
242 {
243 *p = 44; // session ID
244 p[1] = 18;
245 sprintf(p + 2, "%08X%08X", session[s].unique_id, session[s].opened);
246 p += p[1];
247 if (state == RADIUSSTART)
248 { // start
249 *p = 41; // delay
250 p[1] = 6;
251 *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
252 p += p[1];
253 sess_local[s].last_interim = time_now; // Setup "first" Interim
254 }
255 else
256 { // stop, interim
257 *p = 42; // input octets
258 p[1] = 6;
259 *(uint32_t *) (p + 2) = htonl(session[s].cin);
260 p += p[1];
261 *p = 43; // output octets
262 p[1] = 6;
263 *(uint32_t *) (p + 2) = htonl(session[s].cout);
264 p += p[1];
265 *p = 46; // session time
266 p[1] = 6;
267 *(uint32_t *) (p + 2) = htonl(time(NULL) - session[s].opened);
268 p += p[1];
269 *p = 47; // input packets
270 p[1] = 6;
271 *(uint32_t *) (p + 2) = htonl(session[s].pin);
272 p += p[1];
273 *p = 48; // output spackets
274 p[1] = 6;
275 *(uint32_t *) (p + 2) = htonl(session[s].pout);
276 p += p[1];
277 }
278
279 if (session[s].snoop_ip && session[s].snoop_port)
280 {
281 *p = 26; // vendor-specific
282 *(uint32_t *) (p + 2) = htonl(9); // Cisco
283 p[6] = 1; // Cisco-Avpair
284 p[7] = 2 + sprintf(p + 8, "intercept=%s:%d",
285 fmtaddr(session[s].snoop_ip, 0), session[s].snoop_port);
286
287 p[1] = p[7] + 6;
288 p += p[1];
289 }
290 }
291 }
292 if (s)
293 {
294 *p = 5; // NAS-Port
295 p[1] = 6;
296 *(uint32_t *) (p + 2) = htonl(s);
297 p += p[1];
298 }
299 if (s && session[s].ip)
300 {
301 *p = 8; // Framed-IP-Address
302 p[1] = 6;
303 *(uint32_t *) (p + 2) = htonl(session[s].ip);
304 p += p[1];
305 }
306 if (*session[s].called)
307 {
308 *p = 30; // called
309 p[1] = strlen(session[s].called) + 2;
310 strcpy(p + 2, session[s].called);
311 p += p[1];
312 }
313 if (*radius[r].calling)
314 {
315 *p = 31; // calling
316 p[1] = strlen(radius[r].calling) + 2;
317 strcpy(p + 2, radius[r].calling);
318 p += p[1];
319 }
320 else if (*session[s].calling)
321 {
322 *p = 31; // calling
323 p[1] = strlen(session[s].calling) + 2;
324 strcpy(p + 2, session[s].calling);
325 p += p[1];
326 }
327 // NAS-IP-Address
328 *p = 4;
329 p[1] = 6;
330 *(uint32_t *)(p + 2) = config->bind_address;
331 p += p[1];
332
333 // All AVpairs added
334 *(uint16_t *) (b + 2) = htons(p - b);
335 if (state != RADIUSAUTH)
336 {
337 // Build auth for accounting packet
338 char z[16] = {0};
339 char hash[16] = {0};
340 MD5_CTX ctx;
341 MD5Init(&ctx);
342 MD5Update(&ctx, b, 4);
343 MD5Update(&ctx, z, 16);
344 MD5Update(&ctx, b + 20, (p - b) - 20);
345 MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret));
346 MD5Final(hash, &ctx);
347 memcpy(b + 4, hash, 16);
348 memcpy(radius[r].auth, hash, 16);
349 }
350 memset(&addr, 0, sizeof(addr));
351 addr.sin_family = AF_INET;
352 *(uint32_t *) & addr.sin_addr = config->radiusserver[(radius[r].try - 1) % config->numradiusservers];
353 {
354 // get radius port
355 uint16_t port = config->radiusport[(radius[r].try - 1) % config->numradiusservers];
356 // assume RADIUS accounting port is the authentication port +1
357 addr.sin_port = htons((state == RADIUSAUTH) ? port : port+1);
358 }
359
360 LOG_HEX(5, "RADIUS Send", b, (p - b));
361 sendto(radfds[r & RADIUS_MASK], b, p - b, 0, (void *) &addr, sizeof(addr));
362 }
363
364 // process RADIUS response
365 void processrad(uint8_t *buf, int len, char socket_index)
366 {
367 uint8_t b[MAXCONTROL];
368 MD5_CTX ctx;
369 uint16_t r;
370 sessionidt s;
371 tunnelidt t = 0;
372 hasht hash;
373 uint8_t routes = 0;
374 int r_code;
375 int r_id;
376
377 CSTAT(processrad);
378
379 LOG_HEX(5, "RADIUS Response", buf, len);
380 if (len < 20 || len < ntohs(*(uint16_t *) (buf + 2)))
381 {
382 LOG(1, 0, 0, "Duff RADIUS response length %d\n", len);
383 return ;
384 }
385
386 r_code = buf[0]; // response type
387 r_id = buf[1]; // radius reply indentifier.
388
389 len = ntohs(*(uint16_t *) (buf + 2));
390 r = socket_index | (r_id << RADIUS_SHIFT);
391 s = radius[r].session;
392 LOG(3, s, session[s].tunnel, "Received %s, radius %d response for session %u (%s, id %d)\n",
393 radius_state(radius[r].state), r, s, radius_code(r_code), r_id);
394
395 if (!s && radius[r].state != RADIUSSTOP)
396 {
397 LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n");
398 return;
399 }
400 if (radius[r].state != RADIUSAUTH && radius[r].state != RADIUSSTART
401 && radius[r].state != RADIUSSTOP && radius[r].state != RADIUSINTERIM)
402 {
403 LOG(1, s, session[s].tunnel, " Unexpected RADIUS response\n");
404 return;
405 }
406 t = session[s].tunnel;
407 MD5Init(&ctx);
408 MD5Update(&ctx, buf, 4);
409 MD5Update(&ctx, radius[r].auth, 16);
410 MD5Update(&ctx, buf + 20, len - 20);
411 MD5Update(&ctx, config->radiussecret, strlen(config->radiussecret));
412 MD5Final(hash, &ctx);
413 do {
414 if (memcmp(hash, buf + 4, 16))
415 {
416 LOG(0, s, session[s].tunnel, " Incorrect auth on RADIUS response!! (wrong secret in radius config?)\n");
417 return; // Do nothing. On timeout, it will try the next radius server.
418 }
419
420 if ((radius[r].state == RADIUSAUTH && r_code != AccessAccept && r_code != AccessReject) ||
421 ((radius[r].state == RADIUSSTART || radius[r].state == RADIUSSTOP || radius[r].state == RADIUSINTERIM) && r_code != AccountingResponse))
422 {
423 LOG(1, s, session[s].tunnel, " Unexpected RADIUS response %s\n", radius_code(r_code));
424 return; // We got something we didn't expect. Let the timeouts take
425 // care off finishing the radius session if that's really correct.
426 }
427
428 if (radius[r].state == RADIUSAUTH)
429 {
430 // run post-auth plugin
431 struct param_post_auth packet = {
432 &tunnel[t],
433 &session[s],
434 session[s].user,
435 (r_code == AccessAccept),
436 radius[r].chap ? PPPCHAP : PPPPAP
437 };
438
439 run_plugins(PLUGIN_POST_AUTH, &packet);
440 r_code = packet.auth_allowed ? AccessAccept : AccessReject;
441
442 // process auth response
443 if (radius[r].chap)
444 {
445 // CHAP
446 uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPCHAP);
447 if (!p) return; // Abort!
448
449 *p = (r_code == AccessAccept) ? 3 : 4; // ack/nak
450 p[1] = radius[r].id;
451 *(uint16_t *) (p + 2) = ntohs(4); // no message
452 tunnelsend(b, (p - b) + 4, t); // send it
453
454 LOG(3, s, session[s].tunnel, " CHAP User %s authentication %s.\n", session[s].user,
455 (r_code == AccessAccept) ? "allowed" : "denied");
456 }
457 else
458 {
459 // PAP
460 uint8_t *p = makeppp(b, sizeof(b), 0, 0, t, s, PPPPAP);
461 if (!p) return; // Abort!
462
463 // ack/nak
464 *p = r_code;
465 p[1] = radius[r].id;
466 *(uint16_t *) (p + 2) = ntohs(5);
467 p[4] = 0; // no message
468 tunnelsend(b, (p - b) + 5, t); // send it
469
470 LOG(3, s, session[s].tunnel, " PAP User %s authentication %s.\n", session[s].user,
471 (r_code == AccessAccept) ? "allowed" : "denied");
472 }
473
474 if (r_code == AccessAccept)
475 {
476 // Login successful
477 // Extract IP, routes, etc
478 uint8_t *p = buf + 20;
479 uint8_t *e = buf + len;
480 for (; p + 2 <= e && p[1] && p + p[1] <= e; p += p[1])
481 {
482 if (*p == 8)
483 {
484 // Framed-IP-Address
485 if (p[1] < 6) continue;
486 session[s].ip = ntohl(*(uint32_t *) (p + 2));
487 session[s].ip_pool_index = -1;
488 LOG(3, s, session[s].tunnel, " Radius reply contains IP address %s\n",
489 fmtaddr(htonl(session[s].ip), 0));
490
491 if (session[s].ip == 0xFFFFFFFE)
492 session[s].ip = 0; // assign from pool
493 }
494 else if (*p == 135)
495 {
496 // DNS address
497 if (p[1] < 6) continue;
498 session[s].dns1 = ntohl(*(uint32_t *) (p + 2));
499 LOG(3, s, session[s].tunnel, " Radius reply contains primary DNS address %s\n",
500 fmtaddr(htonl(session[s].dns1), 0));
501 }
502 else if (*p == 136)
503 {
504 // DNS address
505 if (p[1] < 6) continue;
506 session[s].dns2 = ntohl(*(uint32_t *) (p + 2));
507 LOG(3, s, session[s].tunnel, " Radius reply contains secondary DNS address %s\n",
508 fmtaddr(htonl(session[s].dns2), 0));
509 }
510 else if (*p == 22)
511 {
512 // Framed-Route
513 in_addr_t ip = 0, mask = 0;
514 uint8_t u = 0;
515 uint8_t bits = 0;
516 uint8_t *n = p + 2;
517 uint8_t *e = p + p[1];
518 while (n < e && (isdigit(*n) || *n == '.'))
519 {
520 if (*n == '.')
521 {
522 ip = (ip << 8) + u;
523 u = 0;
524 }
525 else
526 u = u * 10 + *n - '0';
527 n++;
528 }
529 ip = (ip << 8) + u;
530 if (*n == '/')
531 {
532 n++;
533 while (n < e && isdigit(*n))
534 bits = bits * 10 + *n++ - '0';
535 mask = (( -1) << (32 - bits));
536 }
537 else if ((ip >> 24) < 128)
538 mask = 0xFF0000;
539 else if ((ip >> 24) < 192)
540 mask = 0xFFFF0000;
541 else
542 mask = 0xFFFFFF00;
543
544 if (routes == MAXROUTE)
545 {
546 LOG(1, s, session[s].tunnel, " Too many routes\n");
547 }
548 else if (ip)
549 {
550 LOG(3, s, session[s].tunnel, " Radius reply contains route for %s/%s\n",
551 fmtaddr(htonl(ip), 0), fmtaddr(htonl(mask), 1));
552
553 session[s].route[routes].ip = ip;
554 session[s].route[routes].mask = mask;
555 routes++;
556 }
557 }
558 else if (*p == 11)
559 {
560 // Filter-Id
561 char *filter = p + 2;
562 int l = p[1] - 2;
563 char *suffix;
564 uint8_t *f = 0;
565 int i;
566
567 LOG(3, s, session[s].tunnel, " Radius reply contains Filter-Id \"%.*s\"\n", l, filter);
568 if ((suffix = memchr(filter, '.', l)))
569 {
570 int b = suffix - filter;
571 if (l - b == 3 && !memcmp("in", suffix+1, 2))
572 f = &session[s].filter_in;
573 else if (l - b == 4 && !memcmp("out", suffix+1, 3))
574 f = &session[s].filter_out;
575
576 l = b;
577 }
578
579 if (!f)
580 {
581 LOG(3, s, session[s].tunnel, " Invalid filter\n");
582 continue;
583 }
584
585 for (*f = 0, i = 0; !*f && i < MAXFILTER; i++)
586 if (strlen(ip_filters[i].name) == l &&
587 !strncmp(ip_filters[i].name, filter, l))
588 *f = i + 1;
589
590 if (*f)
591 ip_filters[*f - 1].used++;
592 else
593 LOG(3, s, session[s].tunnel, " Unknown filter\n");
594
595 }
596 else if (*p == 26 && p[1] >= 7)
597 {
598 // Vendor-Specific Attribute
599 int vendor = ntohl(*(int *)(p + 2));
600 char attrib = *(p + 6);
601 int attrib_length = *(p + 7) - 2;
602 char *avpair, *value, *key, *newp;
603
604 LOG(3, s, session[s].tunnel, " Radius reply contains Vendor-Specific. Vendor=%d Attrib=%d Length=%d\n", vendor, attrib, attrib_length);
605 if (vendor != 9 || attrib != 1)
606 {
607 LOG(3, s, session[s].tunnel, " Unknown vendor-specific\n");
608 continue;
609 }
610
611 if (attrib_length < 0) continue;
612
613 avpair = key = calloc(attrib_length + 1, 1);
614 memcpy(avpair, p + 8, attrib_length);
615 LOG(3, s, session[s].tunnel, " Cisco-Avpair value: %s\n", avpair);
616 do {
617 value = strchr(key, '=');
618 if (!value) break;
619 *value++ = 0;
620
621 // Trim quotes off reply string
622 if (*value == '\'' || *value == '\"')
623 {
624 char *x;
625 value++;
626 x = value + strlen(value) - 1;
627 if (*x == '\'' || *x == '\"')
628 *x = 0;
629 }
630
631 // Run hooks
632 newp = strchr(value, ',');
633 if (newp) *newp++ = 0;
634 {
635 struct param_radius_response p = { &tunnel[session[s].tunnel], &session[s], key, value };
636 run_plugins(PLUGIN_RADIUS_RESPONSE, &p);
637 }
638 key = newp;
639 } while (newp);
640 free(avpair);
641 }
642 else if (*p == 99)
643 {
644 // Framed-IPv6-Route
645 struct in6_addr r6;
646 int prefixlen;
647 uint8_t *n = p + 2;
648 uint8_t *e = p + p[1];
649 uint8_t *m = strchr(n, '/');
650
651 *m++ = 0;
652 inet_pton(AF_INET6, n, &r6);
653
654 prefixlen = 0;
655 while (m < e && isdigit(*m)) {
656 prefixlen = prefixlen * 10 + *m++ - '0';
657 }
658
659 if (prefixlen)
660 {
661 LOG(3, s, session[s].tunnel,
662 " Radius reply contains route for %s/%d\n",
663 n, prefixlen);
664 session[s].ipv6route = r6;
665 session[s].ipv6prefixlen = prefixlen;
666 }
667 }
668 }
669 }
670 else if (r_code == AccessReject)
671 {
672 LOG(2, s, session[s].tunnel, " Authentication rejected for %s\n", session[s].user);
673 sessionkill(s, "Authentication rejected");
674 break;
675 }
676
677 if (!session[s].dns1 && config->default_dns1)
678 {
679 session[s].dns1 = htonl(config->default_dns1);
680 LOG(3, s, t, " Sending dns1 = %s\n", fmtaddr(config->default_dns1, 0));
681 }
682 if (!session[s].dns2 && config->default_dns2)
683 {
684 session[s].dns2 = htonl(config->default_dns2);
685 LOG(3, s, t, " Sending dns2 = %s\n", fmtaddr(config->default_dns2, 0));
686 }
687
688 // Valid Session, set it up
689 session[s].unique_id = 0;
690 sessionsetup(t, s);
691 }
692 else
693 {
694 // An ack for a stop or start record.
695 LOG(3, s, t, " RADIUS accounting ack recv in state %s\n", radius_state(radius[r].state));
696 break;
697 }
698 } while (0);
699
700 // finished with RADIUS
701 radiusclear(r, s);
702 }
703
704 // Send a retry for RADIUS/CHAP message
705 void radiusretry(uint16_t r)
706 {
707 sessionidt s = radius[r].session;
708 tunnelidt t = 0;
709
710 CSTAT(radiusretry);
711
712 if (s) t = session[s].tunnel;
713
714 radius[r].retry = backoff(radius[r].try + 1);
715 switch (radius[r].state)
716 {
717 case RADIUSCHAP: // sending CHAP down PPP
718 sendchap(t, s);
719 break;
720 case RADIUSIPCP:
721 sendipcp(t, s); // send IPCP
722 break;
723 case RADIUSAUTH: // sending auth to RADIUS server
724 radiussend(r, RADIUSAUTH);
725 break;
726 case RADIUSSTART: // sending start accounting to RADIUS server
727 radiussend(r, RADIUSSTART);
728 break;
729 case RADIUSSTOP: // sending stop accounting to RADIUS server
730 radiussend(r, RADIUSSTOP);
731 break;
732 case RADIUSINTERIM: // sending interim accounting to RADIUS server
733 radiussend(r, RADIUSINTERIM);
734 break;
735 default:
736 case RADIUSNULL: // Not in use
737 case RADIUSWAIT: // waiting timeout before available, in case delayed reply from RADIUS server
738 // free up RADIUS task
739 radiusclear(r, s);
740 LOG(3, s, session[s].tunnel, "Freeing up radius session %d\n", r);
741 break;
742 }
743 }
for cloning use: "git clone git://git.sameswireless.fr/l2tpns.git" ; For add to your sources.list: "deb http://package.sameswifi.fr/ jessie main"