2 * Copyright (C) 2006-2008 Stig Venaas <venaas@uninett.no>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
10 #include <sys/socket.h>
11 #include <netinet/in.h>
20 #include <sys/types.h>
21 #include <sys/select.h>
24 #include <arpa/inet.h>
27 #include <openssl/ssl.h>
28 #include <openssl/err.h>
32 #include "radsecproxy.h"
35 static struct addrinfo *srcres = NULL;
37 void tlssetsrcres(char *source) {
39 srcres = resolve_hostport_addrinfo(RAD_TLS, source);
42 int tlsconnect(struct server *server, struct timeval *when, int timeout, char *text) {
49 debug(DBG_DBG, "tlsconnect: called from %s", text);
50 pthread_mutex_lock(&server->lock);
51 if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
52 /* already reconnected, nothing to do */
53 debug(DBG_DBG, "tlsconnect(%s): seems already reconnected", text);
54 pthread_mutex_unlock(&server->lock);
59 gettimeofday(&now, NULL);
60 elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
61 if (timeout && server->lastconnecttry.tv_sec && elapsed > timeout) {
62 debug(DBG_DBG, "tlsconnect: timeout");
63 if (server->sock >= 0)
65 SSL_free(server->ssl);
67 pthread_mutex_unlock(&server->lock);
70 if (server->connectionok) {
71 server->connectionok = 0;
73 } else if (elapsed < 1)
75 else if (elapsed < 60) {
76 debug(DBG_INFO, "tlsconnect: sleeping %lds", elapsed);
78 } else if (elapsed < 100000) {
79 debug(DBG_INFO, "tlsconnect: sleeping %ds", 60);
82 server->lastconnecttry.tv_sec = now.tv_sec; /* no sleep at startup */
83 debug(DBG_WARN, "tlsconnect: trying to open TLS connection to %s port %s", server->conf->host, server->conf->port);
84 if (server->sock >= 0)
86 if ((server->sock = connecttcp(server->conf->addrinfo, srcres)) < 0) {
87 debug(DBG_ERR, "tlsconnect: connecttcp failed");
91 SSL_free(server->ssl);
93 ctx = tlsgetctx(RAD_TLS, server->conf->tlsconf);
96 server->ssl = SSL_new(ctx);
100 SSL_set_fd(server->ssl, server->sock);
101 if (SSL_connect(server->ssl) <= 0) {
102 while ((error = ERR_get_error()))
103 debug(DBG_ERR, "tlsconnect: TLS: %s", ERR_error_string(error, NULL));
106 cert = verifytlscert(server->ssl);
109 if (verifyconfcert(cert, server->conf)) {
115 debug(DBG_WARN, "tlsconnect: TLS connection to %s port %s up", server->conf->host, server->conf->port);
116 server->connectionok = 1;
117 gettimeofday(&server->lastconnecttry, NULL);
118 pthread_mutex_unlock(&server->lock);
122 /* timeout in seconds, 0 means no timeout (blocking), returns when num bytes have been read, or timeout */
123 /* returns 0 on timeout, -1 on error and num if ok */
124 int sslreadtimeout(SSL *ssl, unsigned char *buf, int num, int timeout) {
125 int s, ndesc, cnt, len;
126 fd_set readfds, writefds;
127 struct timeval timer;
132 /* make socket non-blocking? */
133 for (len = 0; len < num; len += cnt) {
138 timer.tv_sec = timeout;
141 ndesc = select(s + 1, &readfds, &writefds, NULL, timeout ? &timer : NULL);
145 cnt = SSL_read(ssl, buf + len, num - len);
147 switch (SSL_get_error(ssl, cnt)) {
148 case SSL_ERROR_WANT_READ:
149 case SSL_ERROR_WANT_WRITE:
152 case SSL_ERROR_ZERO_RETURN:
153 /* remote end sent close_notify, send one back */
163 /* timeout in seconds, 0 means no timeout (blocking) */
164 unsigned char *radtlsget(SSL *ssl, int timeout) {
166 unsigned char buf[4], *rad;
169 cnt = sslreadtimeout(ssl, buf, 4, timeout);
171 debug(DBG_DBG, cnt ? "radtlsget: connection lost" : "radtlsget: timeout");
178 debug(DBG_ERR, "radtlsget: malloc failed");
183 cnt = sslreadtimeout(ssl, rad + 4, len - 4, timeout);
185 debug(DBG_DBG, cnt ? "radtlsget: connection lost" : "radtlsget: timeout");
194 debug(DBG_WARN, "radtlsget: packet smaller than minimum radius size");
197 debug(DBG_DBG, "radtlsget: got %d bytes", len);
201 int clientradputtls(struct server *server, unsigned char *rad) {
205 struct clsrvconf *conf = server->conf;
207 if (!server->connectionok)
210 if ((cnt = SSL_write(server->ssl, rad, len)) <= 0) {
211 while ((error = ERR_get_error()))
212 debug(DBG_ERR, "clientradputtls: TLS: %s", ERR_error_string(error, NULL));
216 debug(DBG_DBG, "clientradputtls: Sent %d bytes, Radius packet of length %d to TLS peer %s", cnt, len, conf->host);
220 void *tlsclientrd(void *arg) {
221 struct server *server = (struct server *)arg;
223 struct timeval now, lastconnecttry;
226 /* yes, lastconnecttry is really necessary */
227 lastconnecttry = server->lastconnecttry;
228 buf = radtlsget(server->ssl, server->dynamiclookuparg ? IDLE_TIMEOUT : 0);
230 if (server->dynamiclookuparg)
232 tlsconnect(server, &lastconnecttry, 0, "tlsclientrd");
238 if (server->dynamiclookuparg) {
239 gettimeofday(&now, NULL);
240 if (now.tv_sec - server->lastreply.tv_sec > IDLE_TIMEOUT) {
241 debug(DBG_INFO, "tlsclientrd: idle timeout for %s", server->conf->name);
247 server->clientrdgone = 1;
251 void *tlsserverwr(void *arg) {
254 struct client *client = (struct client *)arg;
255 struct queue *replyq;
256 struct request *reply;
258 debug(DBG_DBG, "tlsserverwr: starting for %s", addr2string(client->addr));
259 replyq = client->replyq;
261 pthread_mutex_lock(&replyq->mutex);
262 while (!list_first(replyq->entries)) {
264 debug(DBG_DBG, "tlsserverwr: waiting for signal");
265 pthread_cond_wait(&replyq->cond, &replyq->mutex);
266 debug(DBG_DBG, "tlsserverwr: got signal");
269 /* ssl might have changed while waiting */
270 pthread_mutex_unlock(&replyq->mutex);
271 debug(DBG_DBG, "tlsserverwr: exiting as requested");
276 reply = (struct request *)list_shift(replyq->entries);
277 pthread_mutex_unlock(&replyq->mutex);
278 cnt = SSL_write(client->ssl, reply->replybuf, RADLEN(reply->replybuf));
280 debug(DBG_DBG, "tlsserverwr: sent %d bytes, Radius packet of length %d to %s",
281 cnt, RADLEN(reply->replybuf), addr2string(client->addr));
283 while ((error = ERR_get_error()))
284 debug(DBG_ERR, "tlsserverwr: SSL: %s", ERR_error_string(error, NULL));
289 void tlsserverrd(struct client *client) {
292 pthread_t tlsserverwrth;
294 debug(DBG_DBG, "tlsserverrd: starting for %s", addr2string(client->addr));
296 if (pthread_create(&tlsserverwrth, NULL, tlsserverwr, (void *)client)) {
297 debug(DBG_ERR, "tlsserverrd: pthread_create failed");
302 buf = radtlsget(client->ssl, 0);
304 debug(DBG_ERR, "tlsserverrd: connection from %s lost", addr2string(client->addr));
307 debug(DBG_DBG, "tlsserverrd: got Radius message from %s", addr2string(client->addr));
316 debug(DBG_ERR, "tlsserverrd: message authentication/validation failed, closing connection from %s", addr2string(client->addr));
321 /* stop writer by setting ssl to NULL and give signal in case waiting for data */
323 pthread_mutex_lock(&client->replyq->mutex);
324 pthread_cond_signal(&client->replyq->cond);
325 pthread_mutex_unlock(&client->replyq->mutex);
326 debug(DBG_DBG, "tlsserverrd: waiting for writer to end");
327 pthread_join(tlsserverwrth, NULL);
328 debug(DBG_DBG, "tlsserverrd: reader for %s exiting", addr2string(client->addr));
331 void *tlsservernew(void *arg) {
333 struct sockaddr_storage from;
334 socklen_t fromlen = sizeof(from);
335 struct clsrvconf *conf;
336 struct list_node *cur = NULL;
341 struct client *client;
344 if (getpeername(s, (struct sockaddr *)&from, &fromlen)) {
345 debug(DBG_DBG, "tlsservernew: getpeername failed, exiting");
348 debug(DBG_WARN, "tlsservernew: incoming TLS connection from %s", addr2string((struct sockaddr *)&from));
350 conf = find_clconf(RAD_TLS, (struct sockaddr *)&from, &cur);
352 ctx = tlsgetctx(RAD_TLS, conf->tlsconf);
360 if (SSL_accept(ssl) <= 0) {
361 while ((error = ERR_get_error()))
362 debug(DBG_ERR, "tlsservernew: SSL: %s", ERR_error_string(error, NULL));
363 debug(DBG_ERR, "tlsservernew: SSL_accept failed");
366 cert = verifytlscert(ssl);
372 if (verifyconfcert(cert, conf)) {
374 client = addclient(conf, 1);
377 client->addr = addr_copy((struct sockaddr *)&from);
379 removeclient(client);
381 debug(DBG_WARN, "tlsservernew: failed to create new client instance");
384 conf = find_clconf(RAD_TLS, (struct sockaddr *)&from, &cur);
386 debug(DBG_WARN, "tlsservernew: ignoring request, no matching TLS client");
396 shutdown(s, SHUT_RDWR);
401 void *tlslistener(void *arg) {
402 pthread_t tlsserverth;
403 int s, *sp = (int *)arg;
404 struct sockaddr_storage from;
405 socklen_t fromlen = sizeof(from);
410 s = accept(*sp, (struct sockaddr *)&from, &fromlen);
412 debug(DBG_WARN, "accept failed");
415 if (pthread_create(&tlsserverth, NULL, tlsservernew, (void *)&s)) {
416 debug(DBG_ERR, "tlslistener: pthread_create failed");
417 shutdown(s, SHUT_RDWR);
421 pthread_detach(tlsserverth);