+++ /dev/null
-/*
- * Copyright (C) 2008-2009 Stig Venaas <venaas@uninett.no>
- *
- * 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.
- */
-
-#include <signal.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <string.h>
-#include <unistd.h>
-#include <limits.h>
-#ifdef SYS_SOLARIS9
-#include <fcntl.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/select.h>
-#include <ctype.h>
-#include <sys/wait.h>
-#include <arpa/inet.h>
-#include <regex.h>
-#include <pthread.h>
-#include "list.h"
-#include "hostport.h"
-#include "radsecproxy.h"
-
-#ifdef RADPROT_TCP
-#include "debug.h"
-#include "util.h"
-static void setprotoopts(struct commonprotoopts *opts);
-static char **getlistenerargs();
-void *tcplistener(void *arg);
-int tcpconnect(struct server *server, struct timeval *when, int timeout, char * text);
-void *tcpclientrd(void *arg);
-int clientradputtcp(struct server *server, unsigned char *rad);
-void tcpsetsrcres();
-
-static const struct protodefs protodefs = {
- "tcp",
- NULL, /* secretdefault */
- SOCK_STREAM, /* socktype */
- "1812", /* portdefault */
- 0, /* retrycountdefault */
- 0, /* retrycountmax */
- REQUEST_RETRY_INTERVAL * REQUEST_RETRY_COUNT, /* retryintervaldefault */
- 60, /* retryintervalmax */
- DUPLICATE_INTERVAL, /* duplicateintervaldefault */
- setprotoopts, /* setprotoopts */
- getlistenerargs, /* getlistenerargs */
- tcplistener, /* listener */
- tcpconnect, /* connecter */
- tcpclientrd, /* clientconnreader */
- clientradputtcp, /* clientradput */
- NULL, /* addclient */
- NULL, /* addserverextra */
- tcpsetsrcres, /* setsrcres */
- NULL /* initextra */
-};
-
-static struct addrinfo *srcres = NULL;
-static uint8_t handle;
-static struct commonprotoopts *protoopts = NULL;
-const struct protodefs *tcpinit(uint8_t h) {
- handle = h;
- return &protodefs;
-}
-
-static void setprotoopts(struct commonprotoopts *opts) {
- protoopts = opts;
-}
-
-static char **getlistenerargs() {
- return protoopts ? protoopts->listenargs : NULL;
-}
-
-void tcpsetsrcres() {
- if (!srcres)
- srcres = resolvepassiveaddrinfo(protoopts ? protoopts->sourcearg : NULL, NULL, protodefs.socktype);
-}
-
-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 */
-
- if (server->sock >= 0)
- close(server->sock);
- if ((server->sock = connecttcphostlist(server->conf->hostports, srcres)) >= 0)
- break;
- }
- server->connectionok = 1;
- gettimeofday(&server->lastconnecttry, NULL);
- pthread_mutex_unlock(&server->lock);
- return 1;
-}
-
-/* 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;
-}
-
-int clientradputtcp(struct server *server, unsigned char *rad) {
- int cnt;
- size_t len;
- struct clsrvconf *conf = server->conf;
-
- if (!server->connectionok)
- return 0;
- len = RADLEN(rad);
- if ((cnt = write(server->sock, rad, len)) <= 0) {
- debug(DBG_ERR, "clientradputtcp: write error");
- return 0;
- }
- debug(DBG_DBG, "clientradputtcp: Sent %d bytes, Radius packet of length %d to TCP peer %s", cnt, len, conf->name);
- return 1;
-}
-
-void *tcpclientrd(void *arg) {
- struct server *server = (struct server *)arg;
- unsigned char *buf;
- struct timeval lastconnecttry;
-
- for (;;) {
- /* yes, lastconnecttry is really necessary */
- lastconnecttry = server->lastconnecttry;
- buf = radtcpget(server->sock, 0);
- if (!buf) {
- tcpconnect(server, &lastconnecttry, 0, "tcpclientrd");
- continue;
- }
-
- replyh(server, buf);
- }
- server->clientrdgone = 1;
- return NULL;
-}
-
-void *tcpserverwr(void *arg) {
- int cnt;
- struct client *client = (struct client *)arg;
- struct gqueue *replyq;
- struct request *reply;
-
- debug(DBG_DBG, "tcpserverwr: starting for %s", addr2string(client->addr));
- replyq = client->replyq;
- for (;;) {
- pthread_mutex_lock(&replyq->mutex);
- while (!list_first(replyq->entries)) {
- if (client->sock >= 0) {
- debug(DBG_DBG, "tcpserverwr: waiting for signal");
- pthread_cond_wait(&replyq->cond, &replyq->mutex);
- debug(DBG_DBG, "tcpserverwr: got signal");
- }
- if (client->sock < 0) {
- /* s might have changed while waiting */
- pthread_mutex_unlock(&replyq->mutex);
- debug(DBG_DBG, "tcpserverwr: exiting as requested");
- pthread_exit(NULL);
- }
- }
- reply = (struct request *)list_shift(replyq->entries);
- pthread_mutex_unlock(&replyq->mutex);
- cnt = write(client->sock, reply->replybuf, RADLEN(reply->replybuf));
- if (cnt > 0)
- debug(DBG_DBG, "tcpserverwr: sent %d bytes, Radius packet of length %d to %s",
- cnt, RADLEN(reply->replybuf), addr2string(client->addr));
- else
- debug(DBG_ERR, "tcpserverwr: write error for %s", addr2string(client->addr));
- freerq(reply);
- }
-}
-
-void tcpserverrd(struct client *client) {
- struct request *rq;
- uint8_t *buf;
- pthread_t tcpserverwrth;
-
- debug(DBG_DBG, "tcpserverrd: starting for %s", addr2string(client->addr));
-
- if (pthread_create(&tcpserverwrth, NULL, tcpserverwr, (void *)client)) {
- debug(DBG_ERR, "tcpserverrd: pthread_create failed");
- return;
- }
-
- for (;;) {
- buf = radtcpget(client->sock, 0);
- if (!buf) {
- debug(DBG_ERR, "tcpserverrd: connection from %s lost", addr2string(client->addr));
- break;
- }
- debug(DBG_DBG, "tcpserverrd: got Radius message from %s", addr2string(client->addr));
- rq = newrequest();
- if (!rq) {
- free(buf);
- continue;
- }
- rq->buf = buf;
- rq->from = client;
- if (!radsrv(rq)) {
- debug(DBG_ERR, "tcpserverrd: message authentication/validation failed, closing connection from %s", addr2string(client->addr));
- break;
- }
- }
-
- /* stop writer by setting s to -1 and give signal in case waiting for data */
- client->sock = -1;
- pthread_mutex_lock(&client->replyq->mutex);
- pthread_cond_signal(&client->replyq->cond);
- pthread_mutex_unlock(&client->replyq->mutex);
- debug(DBG_DBG, "tcpserverrd: waiting for writer to end");
- pthread_join(tcpserverwrth, NULL);
- debug(DBG_DBG, "tcpserverrd: reader for %s exiting", addr2string(client->addr));
-}
-void *tcpservernew(void *arg) {
- int s;
- struct sockaddr_storage from;
- socklen_t fromlen = sizeof(from);
- struct clsrvconf *conf;
- struct client *client;
-
- s = *(int *)arg;
- if (getpeername(s, (struct sockaddr *)&from, &fromlen)) {
- debug(DBG_DBG, "tcpservernew: getpeername failed, exiting");
- goto exit;
- }
- debug(DBG_WARN, "tcpservernew: incoming TCP connection from %s", addr2string((struct sockaddr *)&from));
-
- conf = find_clconf(handle, (struct sockaddr *)&from, NULL);
- if (conf) {
- client = addclient(conf, 1);
- if (client) {
- client->sock = s;
- client->addr = addr_copy((struct sockaddr *)&from);
- tcpserverrd(client);
- removeclient(client);
- } else
- debug(DBG_WARN, "tcpservernew: failed to create new client instance");
- } else
- debug(DBG_WARN, "tcpservernew: ignoring request, no matching TCP client");
-
-exit:
- shutdown(s, SHUT_RDWR);
- close(s);
- pthread_exit(NULL);
-}
-
-void *tcplistener(void *arg) {
- pthread_t tcpserverth;
- int s, *sp = (int *)arg;
- struct sockaddr_storage from;
- socklen_t fromlen = sizeof(from);
-
- listen(*sp, 0);
-
- for (;;) {
- s = accept(*sp, (struct sockaddr *)&from, &fromlen);
- if (s < 0) {
- debug(DBG_WARN, "accept failed");
- continue;
- }
- if (pthread_create(&tcpserverth, NULL, tcpservernew, (void *)&s)) {
- debug(DBG_ERR, "tcplistener: pthread_create failed");
- shutdown(s, SHUT_RDWR);
- close(s);
- continue;
- }
- pthread_detach(tcpserverth);
- }
- free(sp);
- return NULL;
-}
-#else
-const struct protodefs *tcpinit(uint8_t h) {
- return NULL;
-}
-#endif
-
-/* Local Variables: */
-/* c-file-style: "stroustrup" */
-/* End: */
projects / libradsec.git / blobdiff