git.m6w6.name Git - m6w6/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   if (ptr->flags.use_udp)
  50     return MEMCACHED_NOT_SUPPORTED;
  51
  52   memcached_return_t rc;
  53
  54   if (ptr->flags.binary_protocol)
  55     rc= memcached_version_binary(ptr);
  56   else
  57     rc= memcached_version_textual(ptr);
  58
  59   return rc;
  60 }
  61
  62 static inline memcached_return_t memcached_version_textual(memcached_st *ptr)
  63 {
  64   size_t send_length;
  65   memcached_return_t rc;
  66   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  67   char *response_ptr;
  68   const char *command= "version\r\n";
  69
  70   send_length= sizeof("version\r\n") -1;
  71
  72   rc= MEMCACHED_SUCCESS;
  73   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
  74   {
  75     memcached_return_t rrc;
  76     memcached_server_write_instance_st instance=
  77       memcached_server_instance_fetch(ptr, x);
  78
  79     // Optimization, we only fetch version once.
  80     if (instance->major_version != UINT8_MAX)
  81       continue;
  82
  83     rrc= memcached_do(instance, command, send_length, true);
  84     if (rrc != MEMCACHED_SUCCESS)
  85     {
  86       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
  87       rc= MEMCACHED_SOME_ERRORS;
  88       continue;
  89     }
  90
  91     rrc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
  92     if (rrc != MEMCACHED_SUCCESS)
  93     {
  94       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
  95       rc= MEMCACHED_SOME_ERRORS;
  96       continue;
  97     }
  98
  99     /* Find the space, and then move one past it to copy version */
 100     response_ptr= index(buffer, ' ');
 101     response_ptr++;
 102
 103     instance->major_version= (uint8_t)strtol(response_ptr, (char **)NULL, 10);
 104     if (errno == ERANGE)
 105     {
 106       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 107       rc= MEMCACHED_SOME_ERRORS;
 108       continue;
 109     }
 110
 111     response_ptr= index(response_ptr, '.');
 112     response_ptr++;
 113
 114     instance->minor_version= (uint8_t)strtol(response_ptr, (char **)NULL, 10);
 115     if (errno == ERANGE)
 116     {
 117       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 118       rc= MEMCACHED_SOME_ERRORS;
 119       continue;
 120     }
 121
 122     response_ptr= index(response_ptr, '.');
 123     response_ptr++;
 124     instance->micro_version= (uint8_t)strtol(response_ptr, (char **)NULL, 10);
 125     if (errno == ERANGE)
 126     {
 127       instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 128       rc= MEMCACHED_SOME_ERRORS;
 129       continue;
 130     }
 131   }
 132
 133   return rc;
 134 }
 135
 136 static inline memcached_return_t memcached_version_binary(memcached_st *ptr)
 137 {
 138   memcached_return_t rc;
 139   protocol_binary_request_version request= {};
 140   request.message.header.request.magic= PROTOCOL_BINARY_REQ;
 141   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
 142   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
 143
 144   rc= MEMCACHED_SUCCESS;
 145   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 146   {
 147     memcached_return_t rrc;
 148
 149     memcached_server_write_instance_st instance=
 150       memcached_server_instance_fetch(ptr, x);
 151
 152     if (instance->major_version != UINT8_MAX)
 153       continue;
 154
 155     rrc= memcached_do(instance, request.bytes, sizeof(request.bytes), true);
 156     if (rrc != MEMCACHED_SUCCESS)
 157     {
 158       memcached_io_reset(instance);
 159       rc= MEMCACHED_SOME_ERRORS;
 160       continue;
 161     }
 162   }
 163
 164   for (uint32_t x= 0; x < memcached_server_count(ptr); x++)
 165   {
 166     memcached_server_write_instance_st instance=
 167       memcached_server_instance_fetch(ptr, x);
 168
 169     if (instance->major_version != UINT8_MAX)
 170       continue;
 171
 172     if (memcached_server_response_count(instance) > 0)
 173     {
 174       memcached_return_t rrc;
 175       char buffer[32];
 176       char *p;
 177
 178       rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 179       if (rrc != MEMCACHED_SUCCESS)
 180       {
 181         memcached_io_reset(instance);
 182         rc= MEMCACHED_SOME_ERRORS;
 183         continue;
 184       }
 185
 186       instance->major_version= (uint8_t)strtol(buffer, &p, 10);
 187       if (errno == ERANGE)
 188       {
 189         instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 190         rc= MEMCACHED_SOME_ERRORS;
 191         continue;
 192       }
 193
 194       instance->minor_version= (uint8_t)strtol(p + 1, &p, 10);
 195       if (errno == ERANGE)
 196       {
 197         instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 198         rc= MEMCACHED_SOME_ERRORS;
 199         continue;
 200       }
 201
 202       instance->micro_version= (uint8_t)strtol(p + 1, NULL, 10);
 203       if (errno == ERANGE)
 204       {
 205         instance->major_version= instance->minor_version= instance->micro_version= UINT8_MAX;
 206         rc= MEMCACHED_SOME_ERRORS;
 207         continue;
 208       }
 209
 210     }
 211   }
 212
 213   return rc;
 214 }