regress_zlib.c (8801B)
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 #include "mm-internal.h" 60 61 /* zlib 1.2.4 and 1.2.5 do some "clever" things with macros. Instead of 62 saying "(defined(FOO) ? FOO : 0)" they like to say "FOO-0", on the theory 63 that nobody will care if the compile outputs a no-such-identifier warning. 64 65 Sorry, but we like -Werror over here, so I guess we need to define these. 66 I hope that zlib 1.2.6 doesn't break these too. 67 */ 68 #ifndef _LARGEFILE64_SOURCE 69 #define _LARGEFILE64_SOURCE 0 70 #endif 71 #ifndef _LFS64_LARGEFILE 72 #define _LFS64_LARGEFILE 0 73 #endif 74 #ifndef _FILE_OFFSET_BITS 75 #define _FILE_OFFSET_BITS 0 76 #endif 77 #ifndef off64_t 78 #define off64_t ev_int64_t 79 #endif 80 81 #include <zlib.h> 82 83 static int infilter_calls; 84 static int outfilter_calls; 85 static int readcb_finished; 86 static int writecb_finished; 87 static int errorcb_invoked; 88 89 /* 90 * Zlib filters 91 */ 92 93 static void 94 zlib_deflate_free(void *ctx) 95 { 96 z_streamp p = ctx; 97 98 assert(deflateEnd(p) == Z_OK); 99 mm_free(p); 100 } 101 102 static void 103 zlib_inflate_free(void *ctx) 104 { 105 z_streamp p = ctx; 106 107 assert(inflateEnd(p) == Z_OK); 108 mm_free(p); 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 = (unsigned char *)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 = (unsigned char *)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 = (unsigned char *)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 = (unsigned char *)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 pair[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, pair) == -1) { 290 tt_abort_perror("socketpair"); 291 } 292 293 evutil_make_socket_nonblocking(pair[0]); 294 evutil_make_socket_nonblocking(pair[1]); 295 296 bev1 = bufferevent_socket_new(NULL, pair[0], 0); 297 bev2 = bufferevent_socket_new(NULL, pair[1], 0); 298 299 z_output = mm_calloc(sizeof(*z_output), 1); 300 r = deflateInit(z_output, Z_DEFAULT_COMPRESSION); 301 tt_int_op(r, ==, Z_OK); 302 z_input = mm_calloc(sizeof(*z_input), 1); 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 (pair[0] >= 0) 345 evutil_closesocket(pair[0]); 346 if (pair[1] >= 0) 347 evutil_closesocket(pair[1]); 348 }