external/bsd/libevent/dist/test/regress_zlib.c

   1 /*      $NetBSD: regress_zlib.c,v 1.2 2013/04/11 16:56:42 christos Exp $        */
   2 /*
   3  * Copyright (c) 2008-2012 Niels Provos and Nick Mathewson
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 /* The old tests here need assertions to work. */
  29 #undef NDEBUG
  30
  31 #ifdef WIN32
  32 #include <winsock2.h>
  33 #include <windows.h>
  34 #endif
  35
  36 #include "event2/event-config.h"
  37 #include <sys/cdefs.h>
  38 __RCSID("$NetBSD: regress_zlib.c,v 1.2 2013/04/11 16:56:42 christos Exp $");
  39
  40 #include <sys/types.h>
  41 #ifndef WIN32
  42 #include <sys/socket.h>
  43 #include <sys/wait.h>
  44 #include <unistd.h>
  45 #include <netdb.h>
  46 #endif
  47 #include <signal.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51
  52 #include <assert.h>
  53 #include <errno.h>
  54
  55 #include "event2/util.h"
  56 #include "event2/event.h"
  57 #include "event2/event_compat.h"
  58 #include "event2/buffer.h"
  59 #include "event2/bufferevent.h"
  60
  61 #include "regress.h"
  62
  63 /* zlib 1.2.4 and 1.2.5 do some "clever" things with macros.  Instead of
  64    saying "(defined(FOO) ? FOO : 0)" they like to say "FOO-0", on the theory
  65    that nobody will care if the compile outputs a no-such-identifier warning.
  66
  67    Sorry, but we like -Werror over here, so I guess we need to define these.
  68    I hope that zlib 1.2.6 doesn't break these too.
  69 */
  70 #ifndef _LARGEFILE64_SOURCE
  71 #define _LARGEFILE64_SOURCE 0
  72 #endif
  73 #ifndef _LFS64_LARGEFILE
  74 #define _LFS64_LARGEFILE 0
  75 #endif
  76 #ifndef _FILE_OFFSET_BITS
  77 #define _FILE_OFFSET_BITS 0
  78 #endif
  79 #ifndef off64_t
  80 #define off64_t ev_int64_t
  81 #endif
  82
  83 #include <zlib.h>
  84
  85 static int infilter_calls;
  86 static int outfilter_calls;
  87 static int readcb_finished;
  88 static int writecb_finished;
  89 static int errorcb_invoked;
  90
  91 /*
  92  * Zlib filters
  93  */
  94
  95 static void
  96 zlib_deflate_free(void *ctx)
  97 {
  98         z_streamp p = ctx;
  99
 100         assert(deflateEnd(p) == Z_OK);
 101 }
 102
 103 static void
 104 zlib_inflate_free(void *ctx)
 105 {
 106         z_streamp p = ctx;
 107
 108         assert(inflateEnd(p) == Z_OK);
 109 }
 110
 111 static int
 112 getstate(enum bufferevent_flush_mode state)
 113 {
 114         switch (state) {
 115         case BEV_FINISHED:
 116                 return Z_FINISH;
 117         case BEV_FLUSH:
 118                 return Z_SYNC_FLUSH;
 119         case BEV_NORMAL:
 120         default:
 121                 return Z_NO_FLUSH;
 122         }
 123 }
 124
 125 /*
 126  * The input filter is triggered only on new input read from the network.
 127  * That means all input data needs to be consumed or the filter needs to
 128  * initiate its own triggering via a timeout.
 129  */
 130 static enum bufferevent_filter_result
 131 zlib_input_filter(struct evbuffer *src, struct evbuffer *dst,
 132     ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
 133 {
 134         struct evbuffer_iovec v_in[1];
 135         struct evbuffer_iovec v_out[1];
 136         int nread, nwrite;
 137         int res, n;
 138
 139         z_streamp p = ctx;
 140
 141         do {
 142                 /* let's do some decompression */
 143                 n = evbuffer_peek(src, -1, NULL, v_in, 1);
 144                 if (n) {
 145                         p->avail_in = v_in[0].iov_len;
 146                         p->next_in = v_in[0].iov_base;
 147                 } else {
 148                         p->avail_in = 0;
 149                         p->next_in = 0;
 150                 }
 151
 152                 evbuffer_reserve_space(dst, 4096, v_out, 1);
 153                 p->next_out = v_out[0].iov_base;
 154                 p->avail_out = v_out[0].iov_len;
 155
 156                 /* we need to flush zlib if we got a flush */
 157                 res = inflate(p, getstate(state));
 158
 159                 /* let's figure out how much was compressed */
 160                 nread = v_in[0].iov_len - p->avail_in;
 161                 nwrite = v_out[0].iov_len - p->avail_out;
 162
 163                 evbuffer_drain(src, nread);
 164                 v_out[0].iov_len = nwrite;
 165                 evbuffer_commit_space(dst, v_out, 1);
 166
 167                 if (res==Z_BUF_ERROR) {
 168                         /* We're out of space, or out of decodeable input.
 169                            Only if nwrite == 0 assume the latter.
 170                          */
 171                         if (nwrite == 0)
 172                                 return BEV_NEED_MORE;
 173                 } else {
 174                         assert(res == Z_OK || res == Z_STREAM_END);
 175                 }
 176
 177         } while (evbuffer_get_length(src) > 0);
 178
 179         ++infilter_calls;
 180
 181         return (BEV_OK);
 182 }
 183
 184 static enum bufferevent_filter_result
 185 zlib_output_filter(struct evbuffer *src, struct evbuffer *dst,
 186     ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
 187 {
 188         struct evbuffer_iovec v_in[1];
 189         struct evbuffer_iovec v_out[1];
 190         int nread, nwrite;
 191         int res, n;
 192
 193         z_streamp p = ctx;
 194
 195         do {
 196                 /* let's do some compression */
 197                 n = evbuffer_peek(src, -1, NULL, v_in, 1);
 198                 if (n) {
 199                         p->avail_in = v_in[0].iov_len;
 200                         p->next_in = v_in[0].iov_base;
 201                 } else {
 202                         p->avail_in = 0;
 203                         p->next_in = 0;
 204                 }
 205
 206                 evbuffer_reserve_space(dst, 4096, v_out, 1);
 207                 p->next_out = v_out[0].iov_base;
 208                 p->avail_out = v_out[0].iov_len;
 209
 210                 /* we need to flush zlib if we got a flush */
 211                 res = deflate(p, getstate(state));
 212
 213                 /* let's figure out how much was decompressed */
 214                 nread = v_in[0].iov_len - p->avail_in;
 215                 nwrite = v_out[0].iov_len - p->avail_out;
 216
 217                 evbuffer_drain(src, nread);
 218                 v_out[0].iov_len = nwrite;
 219                 evbuffer_commit_space(dst, v_out, 1);
 220
 221                 if (res==Z_BUF_ERROR) {
 222                         /* We're out of space, or out of decodeable input.
 223                            Only if nwrite == 0 assume the latter.
 224                          */
 225                         if (nwrite == 0)
 226                                 return BEV_NEED_MORE;
 227                 } else {
 228                         assert(res == Z_OK || res == Z_STREAM_END);
 229                 }
 230
 231         } while (evbuffer_get_length(src) > 0);
 232
 233         ++outfilter_calls;
 234
 235         return (BEV_OK);
 236 }
 237
 238 /*
 239  * simple bufferevent test (over transparent zlib treatment)
 240  */
 241
 242 static void
 243 readcb(struct bufferevent *bev, void *arg)
 244 {
 245         if (evbuffer_get_length(bufferevent_get_input(bev)) == 8333) {
 246                 struct evbuffer *evbuf = evbuffer_new();
 247                 assert(evbuf != NULL);
 248
 249                 /* gratuitous test of bufferevent_read_buffer */
 250                 bufferevent_read_buffer(bev, evbuf);
 251
 252                 bufferevent_disable(bev, EV_READ);
 253
 254                 if (evbuffer_get_length(evbuf) == 8333) {
 255                         ++readcb_finished;
 256                 }
 257
 258                 evbuffer_free(evbuf);
 259         }
 260 }
 261
 262 static void
 263 writecb(struct bufferevent *bev, void *arg)
 264 {
 265         if (evbuffer_get_length(bufferevent_get_output(bev)) == 0) {
 266                 ++writecb_finished;
 267         }
 268 }
 269
 270 static void
 271 errorcb(struct bufferevent *bev, short what, void *arg)
 272 {
 273         errorcb_invoked = 1;
 274 }
 275
 276 void
 277 test_bufferevent_zlib(void *arg)
 278 {
 279         struct bufferevent *bev1=NULL, *bev2=NULL;
 280         char buffer[8333];
 281         z_stream z_input, z_output;
 282         int i, r;
 283         evutil_socket_t xpair[2] = {-1, -1};
 284         (void)arg;
 285
 286         infilter_calls = outfilter_calls = readcb_finished = writecb_finished
 287             = errorcb_invoked = 0;
 288
 289         if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, xpair) == -1) {
 290                 tt_abort_perror("socketpair");
 291         }
 292
 293         evutil_make_socket_nonblocking(xpair[0]);
 294         evutil_make_socket_nonblocking(xpair[1]);
 295
 296         bev1 = bufferevent_socket_new(NULL, xpair[0], 0);
 297         bev2 = bufferevent_socket_new(NULL, xpair[1], 0);
 298
 299         memset(&z_output, 0, sizeof(z_output));
 300         r = deflateInit(&z_output, Z_DEFAULT_COMPRESSION);
 301         tt_int_op(r, ==, Z_OK);
 302         memset(&z_input, 0, sizeof(z_input));
 303         r = inflateInit(&z_input);
 304         tt_int_op(r, ==, Z_OK);
 305
 306         /* initialize filters */
 307         bev1 = bufferevent_filter_new(bev1, NULL, zlib_output_filter,
 308             BEV_OPT_CLOSE_ON_FREE, zlib_deflate_free, &z_output);
 309         bev2 = bufferevent_filter_new(bev2, zlib_input_filter,
 310             NULL, BEV_OPT_CLOSE_ON_FREE, zlib_inflate_free, &z_input);
 311         bufferevent_setcb(bev1, readcb, writecb, errorcb, NULL);
 312         bufferevent_setcb(bev2, readcb, writecb, errorcb, NULL);
 313
 314         bufferevent_disable(bev1, EV_READ);
 315         bufferevent_enable(bev1, EV_WRITE);
 316
 317         bufferevent_enable(bev2, EV_READ);
 318
 319         for (i = 0; i < (int)sizeof(buffer); i++)
 320                 buffer[i] = i;
 321
 322         /* break it up into multiple buffer chains */
 323         bufferevent_write(bev1, buffer, 1800);
 324         bufferevent_write(bev1, buffer + 1800, sizeof(buffer) - 1800);
 325
 326         /* we are done writing - we need to flush everything */
 327         bufferevent_flush(bev1, EV_WRITE, BEV_FINISHED);
 328
 329         event_dispatch();
 330
 331         tt_want(infilter_calls);
 332         tt_want(outfilter_calls);
 333         tt_want(readcb_finished);
 334         tt_want(writecb_finished);
 335         tt_want(!errorcb_invoked);
 336
 337         test_ok = 1;
 338 end:
 339         if (bev1)
 340                 bufferevent_free(bev1);
 341         if (bev2)
 342                 bufferevent_free(bev2);
 343
 344         if (xpair[0] >= 0)
 345                 evutil_closesocket(xpair[0]);
 346         if (xpair[1] >= 0)
 347                 evutil_closesocket(xpair[1]);
 348 }