1 /*
2 * Copyright (c) 2008-2012 Niels Provos and Nick Mathewson
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 /* The old tests here need assertions to work. */
28 #undef NDEBUG
29
30 #ifdef WIN32
31 #include <winsock2.h>
32 #include <windows.h>
33 #endif
34
35 #include "event2/event-config.h"
36
37 #include <sys/types.h>
38 #ifndef WIN32
39 #include <sys/socket.h>
40 #include <sys/wait.h>
41 #include <unistd.h>
42 #include <netdb.h>
43 #endif
44 #include <signal.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48
49 #include <assert.h>
50 #include <errno.h>
51
52 #include "event2/util.h"
53 #include "event2/event.h"
54 #include "event2/event_compat.h"
55 #include "event2/buffer.h"
56 #include "event2/bufferevent.h"
57
58 #include "regress.h"
59
60 /* zlib 1.2.4 and 1.2.5 do some "clever" things with macros. Instead of
61 saying "(defined(FOO) ? FOO : 0)" they like to say "FOO-0", on the theory
62 that nobody will care if the compile outputs a no-such-identifier warning.
63
64 Sorry, but we like -Werror over here, so I guess we need to define these.
65 I hope that zlib 1.2.6 doesn't break these too.
66 */
67 #ifndef _LARGEFILE64_SOURCE
68 #define _LARGEFILE64_SOURCE 0
69 #endif
70 #ifndef _LFS64_LARGEFILE
71 #define _LFS64_LARGEFILE 0
72 #endif
73 #ifndef _FILE_OFFSET_BITS
74 #define _FILE_OFFSET_BITS 0
75 #endif
76 #ifndef off64_t
77 #define off64_t ev_int64_t
78 #endif
79
80 #include <zlib.h>
81
82 static int infilter_calls;
83 static int outfilter_calls;
84 static int readcb_finished;
85 static int writecb_finished;
86 static int errorcb_invoked;
87
88 /*
89 * Zlib filters
90 */
91
92 static void
zlib_deflate_free(void * ctx)93 zlib_deflate_free(void *ctx)
94 {
95 z_streamp p = ctx;
96
97 assert(deflateEnd(p) == Z_OK);
98 }
99
100 static void
zlib_inflate_free(void * ctx)101 zlib_inflate_free(void *ctx)
102 {
103 z_streamp p = ctx;
104
105 assert(inflateEnd(p) == Z_OK);
106 }
107
108 static int
getstate(enum bufferevent_flush_mode state)109 getstate(enum bufferevent_flush_mode state)
110 {
111 switch (state) {
112 case BEV_FINISHED:
113 return Z_FINISH;
114 case BEV_FLUSH:
115 return Z_SYNC_FLUSH;
116 case BEV_NORMAL:
117 default:
118 return Z_NO_FLUSH;
119 }
120 }
121
122 /*
123 * The input filter is triggered only on new input read from the network.
124 * That means all input data needs to be consumed or the filter needs to
125 * initiate its own triggering via a timeout.
126 */
127 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)128 zlib_input_filter(struct evbuffer *src, struct evbuffer *dst,
129 ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
130 {
131 struct evbuffer_iovec v_in[1];
132 struct evbuffer_iovec v_out[1];
133 int nread, nwrite;
134 int res, n;
135
136 z_streamp p = ctx;
137
138 do {
139 /* let's do some decompression */
140 n = evbuffer_peek(src, -1, NULL, v_in, 1);
141 if (n) {
142 p->avail_in = v_in[0].iov_len;
143 p->next_in = v_in[0].iov_base;
144 } else {
145 p->avail_in = 0;
146 p->next_in = 0;
147 }
148
149 evbuffer_reserve_space(dst, 4096, v_out, 1);
150 p->next_out = v_out[0].iov_base;
151 p->avail_out = v_out[0].iov_len;
152
153 /* we need to flush zlib if we got a flush */
154 res = inflate(p, getstate(state));
155
156 /* let's figure out how much was compressed */
157 nread = v_in[0].iov_len - p->avail_in;
158 nwrite = v_out[0].iov_len - p->avail_out;
159
160 evbuffer_drain(src, nread);
161 v_out[0].iov_len = nwrite;
162 evbuffer_commit_space(dst, v_out, 1);
163
164 if (res==Z_BUF_ERROR) {
165 /* We're out of space, or out of decodeable input.
166 Only if nwrite == 0 assume the latter.
167 */
168 if (nwrite == 0)
169 return BEV_NEED_MORE;
170 } else {
171 assert(res == Z_OK || res == Z_STREAM_END);
172 }
173
174 } while (evbuffer_get_length(src) > 0);
175
176 ++infilter_calls;
177
178 return (BEV_OK);
179 }
180
181 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)182 zlib_output_filter(struct evbuffer *src, struct evbuffer *dst,
183 ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
184 {
185 struct evbuffer_iovec v_in[1];
186 struct evbuffer_iovec v_out[1];
187 int nread, nwrite;
188 int res, n;
189
190 z_streamp p = ctx;
191
192 do {
193 /* let's do some compression */
194 n = evbuffer_peek(src, -1, NULL, v_in, 1);
195 if (n) {
196 p->avail_in = v_in[0].iov_len;
197 p->next_in = v_in[0].iov_base;
198 } else {
199 p->avail_in = 0;
200 p->next_in = 0;
201 }
202
203 evbuffer_reserve_space(dst, 4096, v_out, 1);
204 p->next_out = v_out[0].iov_base;
205 p->avail_out = v_out[0].iov_len;
206
207 /* we need to flush zlib if we got a flush */
208 res = deflate(p, getstate(state));
209
210 /* let's figure out how much was decompressed */
211 nread = v_in[0].iov_len - p->avail_in;
212 nwrite = v_out[0].iov_len - p->avail_out;
213
214 evbuffer_drain(src, nread);
215 v_out[0].iov_len = nwrite;
216 evbuffer_commit_space(dst, v_out, 1);
217
218 if (res==Z_BUF_ERROR) {
219 /* We're out of space, or out of decodeable input.
220 Only if nwrite == 0 assume the latter.
221 */
222 if (nwrite == 0)
223 return BEV_NEED_MORE;
224 } else {
225 assert(res == Z_OK || res == Z_STREAM_END);
226 }
227
228 } while (evbuffer_get_length(src) > 0);
229
230 ++outfilter_calls;
231
232 return (BEV_OK);
233 }
234
235 /*
236 * simple bufferevent test (over transparent zlib treatment)
237 */
238
239 static void
readcb(struct bufferevent * bev,void * arg)240 readcb(struct bufferevent *bev, void *arg)
241 {
242 if (evbuffer_get_length(bufferevent_get_input(bev)) == 8333) {
243 struct evbuffer *evbuf = evbuffer_new();
244 assert(evbuf != NULL);
245
246 /* gratuitous test of bufferevent_read_buffer */
247 bufferevent_read_buffer(bev, evbuf);
248
249 bufferevent_disable(bev, EV_READ);
250
251 if (evbuffer_get_length(evbuf) == 8333) {
252 ++readcb_finished;
253 }
254
255 evbuffer_free(evbuf);
256 }
257 }
258
259 static void
writecb(struct bufferevent * bev,void * arg)260 writecb(struct bufferevent *bev, void *arg)
261 {
262 if (evbuffer_get_length(bufferevent_get_output(bev)) == 0) {
263 ++writecb_finished;
264 }
265 }
266
267 static void
errorcb(struct bufferevent * bev,short what,void * arg)268 errorcb(struct bufferevent *bev, short what, void *arg)
269 {
270 errorcb_invoked = 1;
271 }
272
273 void
test_bufferevent_zlib(void * arg)274 test_bufferevent_zlib(void *arg)
275 {
276 struct bufferevent *bev1=NULL, *bev2=NULL;
277 char buffer[8333];
278 z_stream z_input, z_output;
279 int i, r;
280 evutil_socket_t pair[2] = {-1, -1};
281 (void)arg;
282
283 infilter_calls = outfilter_calls = readcb_finished = writecb_finished
284 = errorcb_invoked = 0;
285
286 if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) {
287 tt_abort_perror("socketpair");
288 }
289
290 evutil_make_socket_nonblocking(pair[0]);
291 evutil_make_socket_nonblocking(pair[1]);
292
293 bev1 = bufferevent_socket_new(NULL, pair[0], 0);
294 bev2 = bufferevent_socket_new(NULL, pair[1], 0);
295
296 memset(&z_output, 0, sizeof(z_output));
297 r = deflateInit(&z_output, Z_DEFAULT_COMPRESSION);
298 tt_int_op(r, ==, Z_OK);
299 memset(&z_input, 0, sizeof(z_input));
300 r = inflateInit(&z_input);
301 tt_int_op(r, ==, Z_OK);
302
303 /* initialize filters */
304 bev1 = bufferevent_filter_new(bev1, NULL, zlib_output_filter,
305 BEV_OPT_CLOSE_ON_FREE, zlib_deflate_free, &z_output);
306 bev2 = bufferevent_filter_new(bev2, zlib_input_filter,
307 NULL, BEV_OPT_CLOSE_ON_FREE, zlib_inflate_free, &z_input);
308 bufferevent_setcb(bev1, readcb, writecb, errorcb, NULL);
309 bufferevent_setcb(bev2, readcb, writecb, errorcb, NULL);
310
311 bufferevent_disable(bev1, EV_READ);
312 bufferevent_enable(bev1, EV_WRITE);
313
314 bufferevent_enable(bev2, EV_READ);
315
316 for (i = 0; i < (int)sizeof(buffer); i++)
317 buffer[i] = i;
318
319 /* break it up into multiple buffer chains */
320 bufferevent_write(bev1, buffer, 1800);
321 bufferevent_write(bev1, buffer + 1800, sizeof(buffer) - 1800);
322
323 /* we are done writing - we need to flush everything */
324 bufferevent_flush(bev1, EV_WRITE, BEV_FINISHED);
325
326 event_dispatch();
327
328 tt_want(infilter_calls);
329 tt_want(outfilter_calls);
330 tt_want(readcb_finished);
331 tt_want(writecb_finished);
332 tt_want(!errorcb_invoked);
333
334 test_ok = 1;
335 end:
336 if (bev1)
337 bufferevent_free(bev1);
338 if (bev2)
339 bufferevent_free(bev2);
340
341 if (pair[0] >= 0)
342 evutil_closesocket(pair[0]);
343 if (pair[1] >= 0)
344 evutil_closesocket(pair[1]);
345 }
346