test/testmemcache.c

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include "testutil.h"
  18 #include "apr.h"
  19 #include "apu.h"
  20 #include "apr_general.h"
  21 #include "apr_strings.h"
  22 #include "apr_hash.h"
  23 #include "apr_memcache.h"
  24 #include "apr_network_io.h"
  25
  26 #if APR_HAVE_STDLIB_H
  27 #include <stdlib.h>             /* for exit() */
  28 #endif
  29
  30 #define HOST "localhost"
  31 #define PORT 11211
  32
  33 /* the total number of items to use for set/get testing */
  34 #define TDATA_SIZE 3000
  35
  36 /* some smaller subset of TDATA_SIZE used for multiget testing */
  37 #define TDATA_SET 100
  38
  39 /* our custom hash function just returns this all the time */
  40 #define HASH_FUNC_RESULT 510
  41
  42 /* all keys will be prefixed with this */
  43 const char prefix[] = "testmemcache";
  44
  45 /* text for values we store */
  46 const char txt[] =
  47 "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Duis at"
  48 "lacus in ligula hendrerit consectetuer. Vestibulum tristique odio"
  49 "iaculis leo. In massa arcu, ultricies a, laoreet nec, hendrerit non,"
  50 "neque. Nulla sagittis sapien ac risus. Morbi ligula dolor, vestibulum"
  51 "nec, viverra id, placerat dapibus, arcu. Curabitur egestas feugiat"
  52 "tellus. Donec dignissim. Nunc ante. Curabitur id lorem. In mollis"
  53 "tortor sit amet eros auctor dapibus. Proin nulla sem, tristique in,"
  54 "convallis id, iaculis feugiat cras amet.";
  55
  56 /*
  57  * this datatype is for our custom server determination function. this might
  58  * be useful if you don't want to rely on simply hashing keys to determine
  59  * where a key belongs, but instead want to write something fancy, or use some
  60  * other kind of configuration data, i.e. a hash plus some data about a
  61  * namespace, or whatever. see my_server_func, and test_memcache_user_funcs
  62  * for the examples.
  63  */
  64 typedef struct {
  65   const char *someval;
  66   apr_uint32_t which_server;
  67 } my_hash_server_baton;
  68
  69
  70 /* this could do something fancy and return some hash result.
  71  * for simplicity, just return the same value, so we can test it later on.
  72  * if you wanted to use some external hashing library or functions for
  73  * consistent hashing, for example, this would be a good place to do it.
  74  */
  75 apr_uint32_t my_hash_func(void *baton, const char *data,
  76                           apr_size_t data_len)
  77 {
  78
  79   return HASH_FUNC_RESULT;
  80 }
  81
  82 /*
  83  * a fancy function to determine which server to use given some kind of data
  84  * and a hash value. this example actually ignores the hash value itself
  85  * and pulls some number from the *baton, which is a struct that has some
  86  * kind of meaningful stuff in it.
  87  */
  88 apr_memcache_server_t *my_server_func(void *baton,
  89                                       apr_memcache_t *mc,
  90                                       const apr_uint32_t hash)
  91 {
  92   apr_memcache_server_t *ms = NULL;
  93   my_hash_server_baton *mhsb = (my_hash_server_baton *)baton;
  94
  95   if(mc->ntotal == 0) {
  96     return NULL;
  97   }
  98
  99   if(mc->ntotal < mhsb->which_server) {
 100     return NULL;
 101   }
 102
 103   ms = mc->live_servers[mhsb->which_server - 1];
 104
 105   return ms;
 106 }
 107
 108 apr_uint16_t firsttime = 0;
 109 int randval(apr_uint32_t high)
 110 {
 111     apr_uint32_t i = 0;
 112     double d = 0;
 113
 114     if (firsttime == 0) {
 115         srand((unsigned) (getpid()));
 116         firsttime = 1;
 117     }
 118
 119     d = (double) rand() / ((double) RAND_MAX + 1);
 120     i = (int) (d * (high - 0 + 1));
 121
 122     return i > 0 ? i : 1;
 123 }
 124
 125 /*
 126  * general test to make sure we can create the memcache struct and add
 127  * some servers, but not more than we tell it we can add
 128  */
 129
 130 static void test_memcache_create(abts_case * tc, void *data)
 131 {
 132   apr_pool_t *pool = p;
 133   apr_status_t rv;
 134   apr_memcache_t *memcache;
 135   apr_memcache_server_t *server, *s;
 136   apr_uint32_t max_servers = 10;
 137   apr_uint32_t i;
 138   apr_uint32_t hash;
 139
 140   rv = apr_memcache_create(pool, max_servers, 0, &memcache);
 141   ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 142
 143   for (i = 1; i <= max_servers; i++) {
 144     apr_port_t port;
 145
 146     port = PORT + i;
 147     rv =
 148       apr_memcache_server_create(pool, HOST, PORT + i, 0, 1, 1, 60, &server);
 149     ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 150
 151     rv = apr_memcache_add_server(memcache, server);
 152     ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 153
 154     s = apr_memcache_find_server(memcache, HOST, port);
 155     ABTS_PTR_EQUAL(tc, server, s);
 156
 157     rv = apr_memcache_disable_server(memcache, s);
 158     ABTS_ASSERT(tc, "server disable failed", rv == APR_SUCCESS);
 159
 160     rv = apr_memcache_enable_server(memcache, s);
 161     ABTS_ASSERT(tc, "server enable failed", rv == APR_SUCCESS);
 162
 163     hash = apr_memcache_hash(memcache, prefix, strlen(prefix));
 164     ABTS_ASSERT(tc, "hash failed", hash > 0);
 165
 166     s = apr_memcache_find_server_hash(memcache, hash);
 167     ABTS_PTR_NOTNULL(tc, s);
 168   }
 169
 170   rv = apr_memcache_server_create(pool, HOST, PORT, 0, 1, 1, 60, &server);
 171   ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 172
 173   rv = apr_memcache_add_server(memcache, server);
 174   ABTS_ASSERT(tc, "server add should have failed", rv != APR_SUCCESS);
 175
 176 }
 177
 178 /* install our own custom hashing and server selection routines. */
 179
 180 int create_test_hash(apr_pool_t *p, apr_hash_t *h)
 181 {
 182   int i;
 183
 184   for (i = 0; i < TDATA_SIZE; i++) {
 185     char *k, *v;
 186
 187     k = apr_pstrcat(p, prefix, apr_itoa(p, i), NULL);
 188     v = apr_pstrndup(p, txt, randval((apr_uint32_t)strlen(txt)));
 189
 190     apr_hash_set(h, k, APR_HASH_KEY_STRING, v);
 191   }
 192
 193   return i;
 194 }
 195
 196 static void test_memcache_user_funcs(abts_case * tc, void *data)
 197 {
 198   apr_pool_t *pool = p;
 199   apr_status_t rv;
 200   apr_memcache_t *memcache;
 201   apr_memcache_server_t *found;
 202   apr_uint32_t max_servers = 10;
 203   apr_uint32_t hres;
 204   apr_uint32_t i;
 205   my_hash_server_baton *baton =
 206     apr_pcalloc(pool, sizeof(my_hash_server_baton));
 207
 208   rv = apr_memcache_create(pool, max_servers, 0, &memcache);
 209   ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 210
 211   /* as noted above, install our custom hash function, and call
 212    * apr_memcache_hash. the return value should be our predefined number,
 213    * and our function just ignores the other args, for simplicity.
 214    */
 215   memcache->hash_func = my_hash_func;
 216
 217   hres = apr_memcache_hash(memcache, "whatever", sizeof("whatever") - 1);
 218   ABTS_INT_EQUAL(tc, HASH_FUNC_RESULT, hres);
 219
 220   /* add some servers */
 221   for(i = 1; i <= 10; i++) {
 222     apr_memcache_server_t *ms;
 223
 224     rv = apr_memcache_server_create(pool, HOST, i, 0, 1, 1, 60, &ms);
 225     ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 226
 227     rv = apr_memcache_add_server(memcache, ms);
 228     ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 229   }
 230
 231   /*
 232    * set 'which_server' in our server_baton to find the third server
 233    * which should have the same port.
 234    */
 235   baton->which_server = 3;
 236   memcache->server_func = my_server_func;
 237   memcache->server_baton = baton;
 238   found = apr_memcache_find_server_hash(memcache, 0);
 239   ABTS_ASSERT(tc, "wrong server found", found->port == baton->which_server);
 240 }
 241
 242 /* test non data related commands like stats and version */
 243 static void test_memcache_meta(abts_case * tc, void *data)
 244 {
 245     apr_pool_t *pool = p;
 246     apr_memcache_t *memcache;
 247     apr_memcache_server_t *server;
 248     apr_memcache_stats_t *stats;
 249     char *result;
 250     apr_status_t rv;
 251
 252     rv = apr_memcache_create(pool, 1, 0, &memcache);
 253     ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 254
 255     rv = apr_memcache_server_create(pool, HOST, PORT, 0, 1, 1, 60, &server);
 256     ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 257
 258     rv = apr_memcache_add_server(memcache, server);
 259     ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 260
 261     rv = apr_memcache_version(server, pool, &result);
 262     ABTS_PTR_NOTNULL(tc, result);
 263
 264     rv = apr_memcache_stats(server, p, &stats);
 265     ABTS_PTR_NOTNULL(tc, stats);
 266
 267     ABTS_STR_NEQUAL(tc, stats->version, result, 5);
 268
 269     /*
 270      * no way to know exactly what will be in most of these, so
 271      * just make sure there is something.
 272      */
 273
 274     ABTS_ASSERT(tc, "pid", stats->pid >= 0);
 275     ABTS_ASSERT(tc, "time", stats->time >= 0);
 276     /* ABTS_ASSERT(tc, "pointer_size", stats->pointer_size >= 0); */
 277     ABTS_ASSERT(tc, "rusage_user", stats->rusage_user >= 0);
 278     ABTS_ASSERT(tc, "rusage_system", stats->rusage_system >= 0);
 279
 280     ABTS_ASSERT(tc, "curr_items", stats->curr_items >= 0);
 281     ABTS_ASSERT(tc, "total_items", stats->total_items >= 0);
 282     ABTS_ASSERT(tc, "bytes", stats->bytes >= 0);
 283
 284     ABTS_ASSERT(tc, "curr_connections", stats->curr_connections >= 0);
 285     ABTS_ASSERT(tc, "total_connections", stats->total_connections >= 0);
 286     ABTS_ASSERT(tc, "connection_structures",
 287                 stats->connection_structures >= 0);
 288
 289     ABTS_ASSERT(tc, "cmd_get", stats->cmd_get >= 0);
 290     ABTS_ASSERT(tc, "cmd_set", stats->cmd_set >= 0);
 291     ABTS_ASSERT(tc, "get_hits", stats->get_hits >= 0);
 292     ABTS_ASSERT(tc, "get_misses", stats->get_misses >= 0);
 293
 294     /* ABTS_ASSERT(tc, "evictions", stats->evictions >= 0); */
 295
 296     ABTS_ASSERT(tc, "bytes_read", stats->bytes_read >= 0);
 297     ABTS_ASSERT(tc, "bytes_written", stats->bytes_written >= 0);
 298     ABTS_ASSERT(tc, "limit_maxbytes", stats->limit_maxbytes >= 0);
 299
 300     /* ABTS_ASSERT(tc, "threads", stats->threads >= 0); */
 301 }
 302
 303 /* test add and replace calls */
 304
 305 static void test_memcache_addreplace(abts_case * tc, void *data)
 306 {
 307  apr_pool_t *pool = p;
 308  apr_status_t rv;
 309  apr_memcache_t *memcache;
 310  apr_memcache_server_t *server;
 311  apr_hash_t *tdata;
 312  apr_hash_index_t *hi;
 313  char *result;
 314  apr_size_t len;
 315
 316   rv = apr_memcache_create(pool, 1, 0, &memcache);
 317   ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 318
 319   rv = apr_memcache_server_create(pool, HOST, PORT, 0, 1, 1, 60, &server);
 320   ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 321
 322   rv = apr_memcache_add_server(memcache, server);
 323   ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 324
 325   tdata = apr_hash_make(p);
 326   create_test_hash(pool, tdata);
 327
 328   for (hi = apr_hash_first(p, tdata); hi; hi = apr_hash_next(hi)) {
 329     const void *k;
 330     void *v;
 331     const char *key;
 332
 333     apr_hash_this(hi, &k, NULL, &v);
 334     key = k;
 335
 336     /* doesn't exist yet, fail */
 337     rv = apr_memcache_replace(memcache, key, v, strlen(v) - 1, 0, 27);
 338     ABTS_ASSERT(tc, "replace should have failed", rv != APR_SUCCESS);
 339
 340     /* doesn't exist yet, succeed */
 341     rv = apr_memcache_add(memcache, key, v, strlen(v), 0, 27);
 342     ABTS_ASSERT(tc, "add failed", rv == APR_SUCCESS);
 343
 344     /* exists now, succeed */
 345     rv = apr_memcache_replace(memcache, key, "new", sizeof("new") - 1, 0, 27);
 346     ABTS_ASSERT(tc, "replace failed", rv == APR_SUCCESS);
 347
 348     /* make sure its different */
 349     rv = apr_memcache_getp(memcache, pool, key, &result, &len, NULL);
 350     ABTS_ASSERT(tc, "get failed", rv == APR_SUCCESS);
 351     ABTS_STR_NEQUAL(tc, result, "new", 3);
 352
 353     /* exists now, fail */
 354     rv = apr_memcache_add(memcache, key, v, strlen(v), 0, 27);
 355     ABTS_ASSERT(tc, "add should have failed", rv != APR_SUCCESS);
 356
 357     /* clean up */
 358     rv = apr_memcache_delete(memcache, key, 0);
 359     ABTS_ASSERT(tc, "delete failed", rv == APR_SUCCESS);
 360   }
 361 }
 362
 363 /* basic tests of the increment and decrement commands */
 364 static void test_memcache_incrdecr(abts_case * tc, void *data)
 365 {
 366  apr_pool_t *pool = p;
 367  apr_status_t rv;
 368  apr_memcache_t *memcache;
 369  apr_memcache_server_t *server;
 370  apr_uint32_t new;
 371  char *result;
 372  apr_size_t len;
 373  apr_uint32_t i;
 374
 375   rv = apr_memcache_create(pool, 1, 0, &memcache);
 376   ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 377
 378   rv = apr_memcache_server_create(pool, HOST, PORT, 0, 1, 1, 60, &server);
 379   ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 380
 381   rv = apr_memcache_add_server(memcache, server);
 382   ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 383
 384   rv = apr_memcache_set(memcache, prefix, "271", sizeof("271") - 1, 0, 27);
 385   ABTS_ASSERT(tc, "set failed", rv == APR_SUCCESS);
 386
 387   for( i = 1; i <= TDATA_SIZE; i++) {
 388     apr_uint32_t expect;
 389
 390     rv = apr_memcache_getp(memcache, pool, prefix, &result, &len, NULL);
 391     ABTS_ASSERT(tc, "get failed", rv == APR_SUCCESS);
 392
 393     expect = i + atoi(result);
 394
 395     rv = apr_memcache_incr(memcache, prefix, i, &new);
 396     ABTS_ASSERT(tc, "incr failed", rv == APR_SUCCESS);
 397
 398     ABTS_INT_EQUAL(tc, expect, new);
 399
 400     rv = apr_memcache_decr(memcache, prefix, i, &new);
 401     ABTS_ASSERT(tc, "decr failed", rv == APR_SUCCESS);
 402     ABTS_INT_EQUAL(tc, atoi(result), new);
 403
 404   }
 405
 406   rv = apr_memcache_getp(memcache, pool, prefix, &result, &len, NULL);
 407   ABTS_ASSERT(tc, "get failed", rv == APR_SUCCESS);
 408
 409   ABTS_INT_EQUAL(tc, 271, atoi(result));
 410
 411   rv = apr_memcache_delete(memcache, prefix, 0);
 412   ABTS_ASSERT(tc, "delete failed", rv == APR_SUCCESS);
 413 }
 414
 415 /* test the multiget functionality */
 416 static void test_memcache_multiget(abts_case * tc, void *data)
 417 {
 418   apr_pool_t *pool = p;
 419   apr_pool_t *tmppool;
 420   apr_status_t rv;
 421   apr_memcache_t *memcache;
 422   apr_memcache_server_t *server;
 423   apr_hash_t *tdata, *values;
 424   apr_hash_index_t *hi;
 425   apr_uint32_t i;
 426
 427   rv = apr_memcache_create(pool, 1, 0, &memcache);
 428   ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 429
 430   rv = apr_memcache_server_create(pool, HOST, PORT, 0, 1, 1, 60, &server);
 431   ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 432
 433   rv = apr_memcache_add_server(memcache, server);
 434   ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 435
 436   values = apr_hash_make(p);
 437   tdata = apr_hash_make(p);
 438
 439   create_test_hash(pool, tdata);
 440
 441   for (hi = apr_hash_first(p, tdata); hi; hi = apr_hash_next(hi)) {
 442     const void *k;
 443     void *v;
 444     const char *key;
 445
 446     apr_hash_this(hi, &k, NULL, &v);
 447     key = k;
 448
 449     rv = apr_memcache_set(memcache, key, v, strlen(v), 0, 27);
 450     ABTS_ASSERT(tc, "set failed", rv == APR_SUCCESS);
 451   }
 452
 453   rv = apr_pool_create(&tmppool, pool);
 454   for (i = 0; i < TDATA_SET; i++)
 455     apr_memcache_add_multget_key(pool,
 456                                  apr_pstrcat(pool, prefix,
 457                                              apr_itoa(pool, i), NULL),
 458                                  &values);
 459
 460   rv = apr_memcache_multgetp(memcache,
 461                              tmppool,
 462                              pool,
 463                              values);
 464
 465   ABTS_ASSERT(tc, "multgetp failed", rv == APR_SUCCESS);
 466   ABTS_ASSERT(tc, "multgetp returned too few results",
 467               apr_hash_count(values) == TDATA_SET);
 468
 469   for (hi = apr_hash_first(p, tdata); hi; hi = apr_hash_next(hi)) {
 470     const void *k;
 471     const char *key;
 472
 473     apr_hash_this(hi, &k, NULL, NULL);
 474     key = k;
 475
 476     rv = apr_memcache_delete(memcache, key, 0);
 477     ABTS_ASSERT(tc, "delete failed", rv == APR_SUCCESS);
 478   }
 479
 480 }
 481
 482 /* test setting and getting */
 483
 484 static void test_memcache_setget(abts_case * tc, void *data)
 485 {
 486     apr_pool_t *pool = p;
 487     apr_status_t rv;
 488     apr_memcache_t *memcache;
 489     apr_memcache_server_t *server;
 490     apr_hash_t *tdata, *values;
 491     apr_hash_index_t *hi;
 492     char *result;
 493     apr_size_t len;
 494
 495     rv = apr_memcache_create(pool, 1, 0, &memcache);
 496     ABTS_ASSERT(tc, "memcache create failed", rv == APR_SUCCESS);
 497
 498     rv = apr_memcache_server_create(pool, HOST, PORT, 0, 1, 1, 60, &server);
 499     ABTS_ASSERT(tc, "server create failed", rv == APR_SUCCESS);
 500
 501     rv = apr_memcache_add_server(memcache, server);
 502     ABTS_ASSERT(tc, "server add failed", rv == APR_SUCCESS);
 503
 504     tdata = apr_hash_make(pool);
 505     values = apr_hash_make(pool);
 506
 507     create_test_hash(pool, tdata);
 508
 509     for (hi = apr_hash_first(p, tdata); hi; hi = apr_hash_next(hi)) {
 510         const void *k;
 511         void *v;
 512         const char *key;
 513
 514         apr_hash_this(hi, &k, NULL, &v);
 515         key = k;
 516
 517         rv = apr_memcache_set(memcache, key, v, strlen(v), 0, 27);
 518         ABTS_ASSERT(tc, "set failed", rv == APR_SUCCESS);
 519         rv = apr_memcache_getp(memcache, pool, key, &result, &len, NULL);
 520         ABTS_ASSERT(tc, "get failed", rv == APR_SUCCESS);
 521     }
 522
 523     rv = apr_memcache_getp(memcache, pool, "nothere3423", &result, &len, NULL);
 524
 525     ABTS_ASSERT(tc, "get should have failed", rv != APR_SUCCESS);
 526
 527     for (hi = apr_hash_first(p, tdata); hi; hi = apr_hash_next(hi)) {
 528         const void *k;
 529         const char *key;
 530
 531         apr_hash_this(hi, &k, NULL, NULL);
 532         key = k;
 533
 534         rv = apr_memcache_delete(memcache, key, 0);
 535         ABTS_ASSERT(tc, "delete failed", rv == APR_SUCCESS);
 536     }
 537 }
 538
 539 /* use apr_socket stuff to see if there is in fact a memcached server
 540  * running on PORT.
 541  */
 542 apr_status_t check_mc(void)
 543 {
 544   apr_pool_t *pool = p;
 545   apr_status_t rv;
 546   apr_socket_t *sock = NULL;
 547   apr_sockaddr_t *sa;
 548   struct iovec vec[2];
 549   apr_size_t written;
 550   char buf[128];
 551   apr_size_t len;
 552
 553   rv = apr_socket_create(&sock, APR_INET, SOCK_STREAM, 0, pool);
 554   if(rv != APR_SUCCESS) {
 555     return rv;
 556   }
 557
 558   rv = apr_sockaddr_info_get(&sa, HOST, APR_INET, PORT, 0, pool);
 559   if(rv != APR_SUCCESS) {
 560     return rv;
 561   }
 562
 563   rv = apr_socket_timeout_set(sock, 1 * APR_USEC_PER_SEC);
 564   if (rv != APR_SUCCESS) {
 565     return rv;
 566   }
 567
 568   rv = apr_socket_connect(sock, sa);
 569   if (rv != APR_SUCCESS) {
 570     return rv;
 571   }
 572
 573   rv = apr_socket_timeout_set(sock, -1);
 574   if (rv != APR_SUCCESS) {
 575     return rv;
 576   }
 577
 578   vec[0].iov_base = "version";
 579   vec[0].iov_len  = sizeof("version") - 1;
 580
 581   vec[1].iov_base = "\r\n";
 582   vec[1].iov_len  = sizeof("\r\n") -1;
 583
 584   rv = apr_socket_sendv(sock, vec, 2, &written);
 585   if (rv != APR_SUCCESS) {
 586     return rv;
 587   }
 588
 589   len = sizeof(buf);
 590   rv = apr_socket_recv(sock, buf, &len);
 591   if(rv != APR_SUCCESS) {
 592     return rv;
 593   }
 594
 595   if(strncmp(buf, "VERSION", sizeof("VERSION")-1) != 0) {
 596     rv = APR_EGENERAL;
 597   }
 598
 599   apr_socket_close(sock);
 600   return rv;
 601 }
 602
 603 abts_suite *testmemcache(abts_suite * suite)
 604 {
 605     apr_status_t rv;
 606     suite = ADD_SUITE(suite);
 607     /* check for a running memcached on the typical port before
 608      * trying to run the tests. succeed silently if we don't find one.
 609      */
 610     rv = check_mc();
 611     if(rv == APR_SUCCESS) {
 612       abts_run_test(suite, test_memcache_create, NULL);
 613       abts_run_test(suite, test_memcache_user_funcs, NULL);
 614       abts_run_test(suite, test_memcache_meta, NULL);
 615       abts_run_test(suite, test_memcache_setget, NULL);
 616       abts_run_test(suite, test_memcache_multiget, NULL);
 617       abts_run_test(suite, test_memcache_addreplace, NULL);
 618       abts_run_test(suite, test_memcache_incrdecr, NULL);
 619     }
 620
 621     return suite;
 622 }