2 * Copyright (C) 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>
31 #include "radsecproxy.h"
34 int tcpconnect(struct server *server, struct timeval *when, int timeout, char *text) {
38 debug(DBG_DBG, "tcpconnect: called from %s", text);
39 pthread_mutex_lock(&server->lock);
40 if (when && memcmp(&server->lastconnecttry, when, sizeof(struct timeval))) {
41 /* already reconnected, nothing to do */
42 debug(DBG_DBG, "tcpconnect(%s): seems already reconnected", text);
43 pthread_mutex_unlock(&server->lock);
48 gettimeofday(&now, NULL);
49 elapsed = now.tv_sec - server->lastconnecttry.tv_sec;
50 if (timeout && server->lastconnecttry.tv_sec && elapsed > timeout) {
51 debug(DBG_DBG, "tcpconnect: timeout");
52 if (server->sock >= 0)
54 pthread_mutex_unlock(&server->lock);
57 if (server->connectionok) {
58 server->connectionok = 0;
60 } else if (elapsed < 1)
62 else if (elapsed < 60) {
63 debug(DBG_INFO, "tcpconnect: sleeping %lds", elapsed);
65 } else if (elapsed < 100000) {
66 debug(DBG_INFO, "tcpconnect: sleeping %ds", 60);
69 server->lastconnecttry.tv_sec = now.tv_sec; /* no sleep at startup */
70 debug(DBG_WARN, "tcpconnect: trying to open TCP connection to %s port %s", server->conf->host, server->conf->port);
71 if (server->sock >= 0)
73 if ((server->sock = connecttcp(server->conf->addrinfo, getsrcprotores(RAD_TCP))) >= 0)
75 debug(DBG_ERR, "tcpconnect: connecttcp failed");
77 debug(DBG_WARN, "tcpconnect: TCP connection to %s port %s up", server->conf->host, server->conf->port);
78 gettimeofday(&server->lastconnecttry, NULL);
79 pthread_mutex_unlock(&server->lock);
83 /* timeout in seconds, 0 means no timeout (blocking), returns when num bytes have been read, or timeout */
84 /* returns 0 on timeout, -1 on error and num if ok */
85 int tcpreadtimeout(int s, unsigned char *buf, int num, int timeout) {
87 fd_set readfds, writefds;
92 /* make socket non-blocking? */
93 for (len = 0; len < num; len += cnt) {
98 timer.tv_sec = timeout;
101 ndesc = select(s + 1, &readfds, &writefds, NULL, timeout ? &timer : NULL);
105 cnt = read(s, buf + len, num - len);
112 /* timeout in seconds, 0 means no timeout (blocking) */
113 unsigned char *radtcpget(int s, int timeout) {
115 unsigned char buf[4], *rad;
118 cnt = tcpreadtimeout(s, buf, 4, timeout);
120 debug(DBG_DBG, cnt ? "radtcpget: connection lost" : "radtcpget: timeout");
127 debug(DBG_ERR, "radtcpget: malloc failed");
132 cnt = tcpreadtimeout(s, rad + 4, len - 4, timeout);
134 debug(DBG_DBG, cnt ? "radtcpget: connection lost" : "radtcpget: timeout");
143 debug(DBG_WARN, "radtcpget: packet smaller than minimum radius size");
146 debug(DBG_DBG, "radtcpget: got %d bytes", len);
150 int clientradputtcp(struct server *server, unsigned char *rad) {
153 struct timeval lastconnecttry;
154 struct clsrvconf *conf = server->conf;
157 lastconnecttry = server->lastconnecttry;
158 while ((cnt = write(server->sock, rad, len)) <= 0) {
159 debug(DBG_ERR, "clientradputtcp: write error");
160 tcpconnect(server, &lastconnecttry, 0, "clientradputtcp");
161 lastconnecttry = server->lastconnecttry;
164 server->connectionok = 1;
165 debug(DBG_DBG, "clientradputtcp: Sent %d bytes, Radius packet of length %d to TCP peer %s", cnt, len, conf->host);
169 void *tcpclientrd(void *arg) {
170 struct server *server = (struct server *)arg;
172 struct timeval lastconnecttry;
175 /* yes, lastconnecttry is really necessary */
176 lastconnecttry = server->lastconnecttry;
177 buf = radtcpget(server->sock, 0);
179 tcpconnect(server, &lastconnecttry, 0, "tcpclientrd");
185 server->clientrdgone = 1;
189 void *tcpserverwr(void *arg) {
191 struct client *client = (struct client *)arg;
192 struct queue *replyq;
195 debug(DBG_DBG, "tcpserverwr: starting for %s", client->conf->host);
196 replyq = client->replyq;
198 pthread_mutex_lock(&replyq->mutex);
199 while (!list_first(replyq->entries)) {
200 if (client->sock >= 0) {
201 debug(DBG_DBG, "tcpserverwr: waiting for signal");
202 pthread_cond_wait(&replyq->cond, &replyq->mutex);
203 debug(DBG_DBG, "tcpserverwr: got signal");
205 if (client->sock < 0) {
206 /* s might have changed while waiting */
207 pthread_mutex_unlock(&replyq->mutex);
208 debug(DBG_DBG, "tcpserverwr: exiting as requested");
212 reply = (struct reply *)list_shift(replyq->entries);
213 pthread_mutex_unlock(&replyq->mutex);
214 cnt = write(client->sock, reply->buf, RADLEN(reply->buf));
216 debug(DBG_DBG, "tcpserverwr: sent %d bytes, Radius packet of length %d",
217 cnt, RADLEN(reply->buf));
219 debug(DBG_ERR, "tcpserverwr: write error for %s", client->conf->host);
225 void tcpserverrd(struct client *client) {
228 pthread_t tcpserverwrth;
230 debug(DBG_DBG, "tcpserverrd: starting for %s", client->conf->host);
232 if (pthread_create(&tcpserverwrth, NULL, tcpserverwr, (void *)client)) {
233 debug(DBG_ERR, "tcpserverrd: pthread_create failed");
238 buf = radtcpget(client->sock, 0);
240 debug(DBG_ERR, "tcpserverrd: connection from %s lost", client->conf->host);
243 debug(DBG_DBG, "tcpserverrd: got Radius message from %s", client->conf->host);
252 debug(DBG_ERR, "tcpserverrd: message authentication/validation failed, closing connection from %s", client->conf->host);
257 /* stop writer by setting s to -1 and give signal in case waiting for data */
259 pthread_mutex_lock(&client->replyq->mutex);
260 pthread_cond_signal(&client->replyq->cond);
261 pthread_mutex_unlock(&client->replyq->mutex);
262 debug(DBG_DBG, "tcpserverrd: waiting for writer to end");
263 pthread_join(tcpserverwrth, NULL);
264 removeclientrqs(client);
265 debug(DBG_DBG, "tcpserverrd: reader for %s exiting", client->conf->host);
268 void *tcpservernew(void *arg) {
270 struct sockaddr_storage from;
271 size_t fromlen = sizeof(from);
272 struct clsrvconf *conf;
273 struct client *client;
276 if (getpeername(s, (struct sockaddr *)&from, &fromlen)) {
277 debug(DBG_DBG, "tcpservernew: getpeername failed, exiting");
280 debug(DBG_WARN, "tcpservernew: incoming TCP connection from %s", addr2string((struct sockaddr *)&from, fromlen));
282 conf = find_clconf(RAD_TCP, (struct sockaddr *)&from, NULL);
284 client = addclient(conf, 1);
288 removeclient(client);
290 debug(DBG_WARN, "tcpservernew: failed to create new client instance");
292 debug(DBG_WARN, "tcpservernew: ignoring request, no matching TCP client");
295 shutdown(s, SHUT_RDWR);
300 void *tcplistener(void *arg) {
301 pthread_t tcpserverth;
302 int s, *sp = (int *)arg;
303 struct sockaddr_storage from;
304 size_t fromlen = sizeof(from);
309 s = accept(*sp, (struct sockaddr *)&from, &fromlen);
311 debug(DBG_WARN, "accept failed");
314 if (pthread_create(&tcpserverth, NULL, tcpservernew, (void *)&s)) {
315 debug(DBG_ERR, "tcplistener: pthread_create failed");
316 shutdown(s, SHUT_RDWR);
320 pthread_detach(tcpserverth);