forked from droe/sslsplit
/
cachemgr.c
164 lines (149 loc) · 4.47 KB
/
cachemgr.c
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/*
* SSLsplit - transparent SSL/TLS interception
* Copyright (c) 2009-2016, Daniel Roethlisberger <daniel@roe.ch>
* All rights reserved.
* http://www.roe.ch/SSLsplit
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "cachemgr.h"
#include "cachefkcrt.h"
#include "cachetgcrt.h"
#include "cachessess.h"
#include "cachedsess.h"
#include "log.h"
#include "attrib.h"
#include <string.h>
#include <pthread.h>
#include <netinet/in.h>
cache_t *cachemgr_fkcrt;
cache_t *cachemgr_tgcrt;
cache_t *cachemgr_ssess;
cache_t *cachemgr_dsess;
/*
* Garbage collector thread entry point.
* Calls the _gc() method on the cache passed as argument, then returns.
*/
static void *
cachemgr_gc_thread(UNUSED void * arg)
{
cache_gc(arg);
return NULL;
}
/*
* Pre-initialize the caches.
* The caches may be initialized before or after libevent and OpenSSL.
* Returns -1 on error, 0 on success.
*/
int
cachemgr_preinit(void)
{
if (!(cachemgr_fkcrt = cache_new(cachefkcrt_init_cb)))
goto out4;
if (!(cachemgr_tgcrt = cache_new(cachetgcrt_init_cb)))
goto out3;
if (!(cachemgr_ssess = cache_new(cachessess_init_cb)))
goto out2;
if (!(cachemgr_dsess = cache_new(cachedsess_init_cb)))
goto out1;
return 0;
out1:
cache_free(cachemgr_ssess);
out2:
cache_free(cachemgr_tgcrt);
out3:
cache_free(cachemgr_fkcrt);
out4:
return -1;
}
/*
* Post-fork initialization.
* Returns -1 on error, 0 on success.
*/
int
cachemgr_init(void)
{
cache_reinit(cachemgr_fkcrt);
cache_reinit(cachemgr_tgcrt);
cache_reinit(cachemgr_ssess);
cache_reinit(cachemgr_dsess);
return 0;
}
/*
* Cleanup the caches and free all memory. Since OpenSSL certificates are
* being freed, this must be done before calling the OpenSSL cleanup methods.
* Also, it is not safe to call this while cachemgr_gc() is still running.
*/
void
cachemgr_fini(void)
{
cache_free(cachemgr_dsess);
cache_free(cachemgr_ssess);
cache_free(cachemgr_tgcrt);
cache_free(cachemgr_fkcrt);
}
/*
* Garbage collect all the cache contents; free's up resources occupied by
* certificates and sessions which are no longer valid.
* This function returns after the cleanup completed and all threads are
* joined.
*/
void
cachemgr_gc(void)
{
pthread_t fkcrt_thr, dsess_thr, ssess_thr;
int rv;
/* the tgcrt cache does not need cleanup */
rv = pthread_create(&fkcrt_thr, NULL, cachemgr_gc_thread,
cachemgr_fkcrt);
if (rv) {
log_err_printf("cachemgr_gc: pthread_create failed: %s\n",
strerror(rv));
}
rv = pthread_create(&ssess_thr, NULL, cachemgr_gc_thread,
cachemgr_ssess);
if (rv) {
log_err_printf("cachemgr_gc: pthread_create failed: %s\n",
strerror(rv));
}
rv = pthread_create(&dsess_thr, NULL, cachemgr_gc_thread,
cachemgr_dsess);
if (rv) {
log_err_printf("cachemgr_gc: pthread_create failed: %s\n",
strerror(rv));
}
rv = pthread_join(fkcrt_thr, NULL);
if (rv) {
log_err_printf("cachemgr_gc: pthread_join failed: %s\n",
strerror(rv));
}
rv = pthread_join(ssess_thr, NULL);
if (rv) {
log_err_printf("cachemgr_gc: pthread_join failed: %s\n",
strerror(rv));
}
rv = pthread_join(dsess_thr, NULL);
if (rv) {
log_err_printf("cachemgr_gc: pthread_join failed: %s\n",
strerror(rv));
}
}
/* vim: set noet ft=c: */