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