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/*
* Copyright (c) 2008-2012 Niels Provos and Nick Mathewson
*
* 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*/
/* The old tests here need assertions to work. */
#undef NDEBUG
#ifdef _WIN32
#include <winsock2.h>
#include <windows.h>
#endif
#include "event2/event-config.h"
#include <sys/types.h>
#ifndef _WIN32
#include <sys/socket.h>
#include <sys/wait.h>
#include <unistd.h>
#include <netdb.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include "event2/util.h"
#include "event2/event.h"
#include "event2/event_compat.h"
#include "event2/buffer.h"
#include "event2/bufferevent.h"
#include "regress.h"
#include "mm-internal.h"
/* zlib 1.2.4 and 1.2.5 do some "clever" things with macros. Instead of
saying "(defined(FOO) ? FOO : 0)" they like to say "FOO-0", on the theory
that nobody will care if the compile outputs a no-such-identifier warning.
Sorry, but we like -Werror over here, so I guess we need to define these.
I hope that zlib 1.2.6 doesn't break these too.
*/
#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE 0
#endif
#ifndef _LFS64_LARGEFILE
#define _LFS64_LARGEFILE 0
#endif
#ifndef _FILE_OFFSET_BITS
#define _FILE_OFFSET_BITS 0
#endif
#ifndef off64_t
#define off64_t ev_int64_t
#endif
#include <zlib.h>
static int infilter_calls;
static int outfilter_calls;
static int readcb_finished;
static int writecb_finished;
static int errorcb_invoked;
/*
* Zlib filters
*/
static void
zlib_deflate_free(void *ctx)
{
z_streamp p = ctx;
assert(deflateEnd(p) == Z_OK);
mm_free(p);
}
static void
zlib_inflate_free(void *ctx)
{
z_streamp p = ctx;
assert(inflateEnd(p) == Z_OK);
mm_free(p);
}
static int
getstate(enum bufferevent_flush_mode state)
{
switch (state) {
case BEV_FINISHED:
return Z_FINISH;
case BEV_FLUSH:
return Z_SYNC_FLUSH;
case BEV_NORMAL:
default:
return Z_NO_FLUSH;
}
}
/*
* The input filter is triggered only on new input read from the network.
* That means all input data needs to be consumed or the filter needs to
* initiate its own triggering via a timeout.
*/
static enum bufferevent_filter_result
zlib_input_filter(struct evbuffer *src, struct evbuffer *dst,
ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
{
struct evbuffer_iovec v_in[1];
struct evbuffer_iovec v_out[1];
int nread, nwrite;
int res, n;
z_streamp p = ctx;
do {
/* let's do some decompression */
n = evbuffer_peek(src, -1, NULL, v_in, 1);
if (n) {
p->avail_in = v_in[0].iov_len;
p->next_in = (unsigned char *)v_in[0].iov_base;
} else {
p->avail_in = 0;
p->next_in = 0;
}
evbuffer_reserve_space(dst, 4096, v_out, 1);
p->next_out = (unsigned char *)v_out[0].iov_base;
p->avail_out = v_out[0].iov_len;
/* we need to flush zlib if we got a flush */
res = inflate(p, getstate(state));
/* let's figure out how much was compressed */
nread = v_in[0].iov_len - p->avail_in;
nwrite = v_out[0].iov_len - p->avail_out;
evbuffer_drain(src, nread);
v_out[0].iov_len = nwrite;
evbuffer_commit_space(dst, v_out, 1);
if (res==Z_BUF_ERROR) {
/* We're out of space, or out of decodeable input.
Only if nwrite == 0 assume the latter.
*/
if (nwrite == 0)
return BEV_NEED_MORE;
} else {
assert(res == Z_OK || res == Z_STREAM_END);
}
} while (evbuffer_get_length(src) > 0);
++infilter_calls;
return (BEV_OK);
}
static enum bufferevent_filter_result
zlib_output_filter(struct evbuffer *src, struct evbuffer *dst,
ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
{
struct evbuffer_iovec v_in[1];
struct evbuffer_iovec v_out[1];
int nread, nwrite;
int res, n;
z_streamp p = ctx;
do {
/* let's do some compression */
n = evbuffer_peek(src, -1, NULL, v_in, 1);
if (n) {
p->avail_in = v_in[0].iov_len;
p->next_in = (unsigned char *)v_in[0].iov_base;
} else {
p->avail_in = 0;
p->next_in = 0;
}
evbuffer_reserve_space(dst, 4096, v_out, 1);
p->next_out = (unsigned char *)v_out[0].iov_base;
p->avail_out = v_out[0].iov_len;
/* we need to flush zlib if we got a flush */
res = deflate(p, getstate(state));
/* let's figure out how much was decompressed */
nread = v_in[0].iov_len - p->avail_in;
nwrite = v_out[0].iov_len - p->avail_out;
evbuffer_drain(src, nread);
v_out[0].iov_len = nwrite;
evbuffer_commit_space(dst, v_out, 1);
if (res==Z_BUF_ERROR) {
/* We're out of space, or out of decodeable input.
Only if nwrite == 0 assume the latter.
*/
if (nwrite == 0)
return BEV_NEED_MORE;
} else {
assert(res == Z_OK || res == Z_STREAM_END);
}
} while (evbuffer_get_length(src) > 0);
++outfilter_calls;
return (BEV_OK);
}
/*
* simple bufferevent test (over transparent zlib treatment)
*/
static void
readcb(struct bufferevent *bev, void *arg)
{
if (evbuffer_get_length(bufferevent_get_input(bev)) == 8333) {
struct evbuffer *evbuf = evbuffer_new();
assert(evbuf != NULL);
/* gratuitous test of bufferevent_read_buffer */
bufferevent_read_buffer(bev, evbuf);
bufferevent_disable(bev, EV_READ);
if (evbuffer_get_length(evbuf) == 8333) {
++readcb_finished;
}
evbuffer_free(evbuf);
}
}
static void
writecb(struct bufferevent *bev, void *arg)
{
if (evbuffer_get_length(bufferevent_get_output(bev)) == 0) {
++writecb_finished;
}
}
static void
errorcb(struct bufferevent *bev, short what, void *arg)
{
errorcb_invoked = 1;
}
void
test_bufferevent_zlib(void *arg)
{
struct bufferevent *bev1=NULL, *bev2=NULL;
char buffer[8333];
z_stream *z_input, *z_output;
int i, r;
evutil_socket_t pair[2] = {-1, -1};
(void)arg;
infilter_calls = outfilter_calls = readcb_finished = writecb_finished
= errorcb_invoked = 0;
if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) {
tt_abort_perror("socketpair");
}
evutil_make_socket_nonblocking(pair[0]);
evutil_make_socket_nonblocking(pair[1]);
bev1 = bufferevent_socket_new(NULL, pair[0], 0);
bev2 = bufferevent_socket_new(NULL, pair[1], 0);
z_output = mm_calloc(sizeof(*z_output), 1);
r = deflateInit(z_output, Z_DEFAULT_COMPRESSION);
tt_int_op(r, ==, Z_OK);
z_input = mm_calloc(sizeof(*z_input), 1);
r = inflateInit(z_input);
tt_int_op(r, ==, Z_OK);
/* initialize filters */
bev1 = bufferevent_filter_new(bev1, NULL, zlib_output_filter,
BEV_OPT_CLOSE_ON_FREE, zlib_deflate_free, z_output);
bev2 = bufferevent_filter_new(bev2, zlib_input_filter,
NULL, BEV_OPT_CLOSE_ON_FREE, zlib_inflate_free, z_input);
bufferevent_setcb(bev1, readcb, writecb, errorcb, NULL);
bufferevent_setcb(bev2, readcb, writecb, errorcb, NULL);
bufferevent_disable(bev1, EV_READ);
bufferevent_enable(bev1, EV_WRITE);
bufferevent_enable(bev2, EV_READ);
for (i = 0; i < (int)sizeof(buffer); i++)
buffer[i] = i;
/* break it up into multiple buffer chains */
bufferevent_write(bev1, buffer, 1800);
bufferevent_write(bev1, buffer + 1800, sizeof(buffer) - 1800);
/* we are done writing - we need to flush everything */
bufferevent_flush(bev1, EV_WRITE, BEV_FINISHED);
event_dispatch();
tt_want(infilter_calls);
tt_want(outfilter_calls);
tt_want(readcb_finished);
tt_want(writecb_finished);
tt_want(!errorcb_invoked);
test_ok = 1;
end:
if (bev1)
bufferevent_free(bev1);
if (bev2)
bufferevent_free(bev2);
if (pair[0] >= 0)
evutil_closesocket(pair[0]);
if (pair[1] >= 0)
evutil_closesocket(pair[1]);
}