git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/version.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  Copyright (C) 2010 Brian Aker All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37 #include <libmemcached/common.h>
  38
  39 const char * memcached_lib_version(void)
  40 {
  41   return LIBMEMCACHED_VERSION_STRING;
  42 }
  43
  44 static inline memcached_return_t memcached_version_binary(memcached_st *ptr);
  45 static inline memcached_return_t memcached_version_textual(memcached_st *ptr);
  46
  47 memcached_return_t memcached_version(memcached_st *ptr)
  48 {
  49   memcached_return_t rc;
  50   if (memcached_failed(rc= initialize_query(ptr)))
  51   {
  52     return rc;
  53   }
  54
  55   if (ptr->flags.use_udp)
  56   {
  57     return MEMCACHED_NOT_SUPPORTED;
  58   }
  59
  60   if (ptr->flags.binary_protocol)
  61   {
  62     rc= memcached_version_binary(ptr);
  63   }
  64   else
  65   {
  66     rc= memcached_version_textual(ptr);
  67   }
  68
  69   return rc;
  70 }
  71
  72 static inline memcached_return_t memcached_version_textual(memcached_st *ptr)
  73 {
  74   struct libmemcached_io_vector_st vector[]=
  75   {
  76     { memcached_literal_param("version\r\n") },
  77   };
  78   memcached_return_t rc= MEMCACHED_SUCCESS;
  79
  80   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
  81   {
  82     memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
  83
  84     // Optimization, we only fetch version once.
  85     if (instance->major_version != UINT8_MAX)
  86     {
  87       continue;
  88     }
  89
  90     memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
  91     if (memcached_failed(rrc))
  92     {
  93       (void)memcached_set_error(*instance, rrc, MEMCACHED_AT);
  94       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
  95       rc= MEMCACHED_SOME_ERRORS;
  96       continue;
  97     }
  98
  99     char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
 100     rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 101     if (memcached_failed(rrc))
 102     {
 103       memcached_set_error(*instance, rrc, MEMCACHED_AT);
 104       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 105       rc= MEMCACHED_SOME_ERRORS;
 106       continue;
 107     }
 108
 109     /* Find the space, and then move one past it to copy version */
 110     char *response_ptr= index(buffer, ' ');
 111     response_ptr++;
 112
 113     long int version= strtol(response_ptr, (char **)NULL, 10);
 114     if (version == LONG_MIN or version == LONG_MAX or errno == EINVAL or version > UINT8_MAX or version == 0)
 115     {
 116       memcached_set_error(*instance, MEMCACHED_PROTOCOL_ERROR, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse major version"));
 117       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 118       rc= MEMCACHED_SOME_ERRORS;
 119       continue;
 120     }
 121     instance->major_version= uint8_t(version);
 122
 123     response_ptr= index(response_ptr, '.');
 124     response_ptr++;
 125
 126     version= strtol(response_ptr, (char **)NULL, 10);
 127     if (version == LONG_MIN or version == LONG_MAX or errno == EINVAL or version > UINT8_MAX)
 128     {
 129       memcached_set_error(*instance, MEMCACHED_PROTOCOL_ERROR, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse minor version"));
 130       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 131       rc= MEMCACHED_SOME_ERRORS;
 132       continue;
 133     }
 134     instance->minor_version= uint8_t(version);
 135
 136     response_ptr= index(response_ptr, '.');
 137     response_ptr++;
 138
 139     version= strtol(response_ptr, (char **)NULL, 10);
 140     if (version == LONG_MIN or version == LONG_MAX or errno == EINVAL or version > UINT8_MAX)
 141     {
 142       memcached_set_error(*instance, MEMCACHED_PROTOCOL_ERROR, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse micro version"));
 143       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 144       rc= MEMCACHED_SOME_ERRORS;
 145       continue;
 146     }
 147     instance->micro_version= uint8_t(version);
 148   }
 149
 150   return rc;
 151 }
 152
 153 static inline memcached_return_t memcached_version_binary(memcached_st *ptr)
 154 {
 155   protocol_binary_request_version request= {};
 156   request.message.header.request.magic= PROTOCOL_BINARY_REQ;
 157   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
 158   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
 159
 160   struct libmemcached_io_vector_st vector[]=
 161   {
 162     { request.bytes, sizeof(request.bytes) }
 163   };
 164
 165   memcached_return_t rc= MEMCACHED_SUCCESS;
 166   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 167   {
 168     memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
 169
 170     if (instance->major_version != UINT8_MAX)
 171     {
 172       continue;
 173     }
 174
 175     memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
 176     if (memcached_failed(rrc))
 177     {
 178       memcached_io_reset(instance);
 179       rc= MEMCACHED_SOME_ERRORS;
 180       continue;
 181     }
 182   }
 183
 184   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 185   {
 186     memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
 187
 188     if (instance->major_version != UINT8_MAX)
 189     {
 190       continue;
 191     }
 192
 193     if (memcached_server_response_count(instance) > 0)
 194     {
 195       char buffer[32];
 196       char *p;
 197
 198       memcached_return_t rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 199       if (memcached_failed(rrc))
 200       {
 201         memcached_io_reset(instance);
 202         rc= MEMCACHED_SOME_ERRORS;
 203         continue;
 204       }
 205
 206       long int version= strtol(buffer, &p, 10);
 207       if (version == LONG_MIN or version == LONG_MAX or errno == EINVAL or version > UINT8_MAX or version == 0)
 208       {
 209         memcached_set_error(*instance, MEMCACHED_PROTOCOL_ERROR, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse major version"));
 210         instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 211         rc= MEMCACHED_SOME_ERRORS;
 212         continue;
 213       }
 214       instance->major_version= uint8_t(version);
 215
 216       version= strtol(p +1, &p, 10);
 217       if (version == LONG_MIN or version == LONG_MAX or errno == EINVAL or version > UINT8_MAX)
 218       {
 219         memcached_set_error(*instance, MEMCACHED_PROTOCOL_ERROR, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse micro version"));
 220         instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 221         rc= MEMCACHED_SOME_ERRORS;
 222         continue;
 223       }
 224       instance->minor_version= uint8_t(version);
 225
 226       version= strtol(p + 1, NULL, 10);
 227       if (errno == ERANGE)
 228       {
 229         memcached_set_error(*instance, MEMCACHED_PROTOCOL_ERROR, MEMCACHED_AT, memcached_literal_param("strtol() failed to parse micro version"));
 230         instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 231         rc= MEMCACHED_SOME_ERRORS;
 232         continue;
 233       }
 234       instance->micro_version= uint8_t(version);
 235     }
 236   }
 237
 238   return rc;
 239 }