text: /** @file
  
    A brief file description
  
    @section license License
  
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at
  
        http://www.apache.org/licenses/LICENSE-2.0
  
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
   */
  
  /* hello.c:  an example hello world program
   *                   
   *
   *
   *	Usage:	
   * 	(NT): Hello.dll 
   * 	(Solaris): hello.so 
   *
   *
   */
  
  #include <stdio.h>
  #include <ts/ts.h>
  
  int
  check_ts_version()
  {
  
    const char *ts_version = INKTrafficServerVersionGet();
    int result = 0;
  
    if (ts_version) {
      int major_ts_version = 0;
      int minor_ts_version = 0;
      int patch_ts_version = 0;
  
      if (sscanf(ts_version, "%d.%d.%d", &major_ts_version, &minor_ts_version, &patch_ts_version) != 3) {
        return 0;
      }
  
      /* Need at least TS 5.2 */
      if (major_ts_version > 5) {
        result = 1;
      } else if (major_ts_version == 5) {
        if (minor_ts_version >= 2) {
          result = 1;
        }
      }
    }
  
    return result;
  }
  
  void
  INKPluginInit(int argc, const char *argv[])
  {
    INKPluginRegistrationInfo info;
  
    info.plugin_name = "hello-world";
    info.vendor_name = "MyCompany";
    info.support_email = "ts-api-support@MyCompany.com";
  
    if (!INKPluginRegister(INK_SDK_VERSION_5_2, &info)) {
      INKError("Plugin registration failed. \n");
    }
  
    if (!check_ts_version()) {
      INKError("Plugin requires Traffic Server 5.2.0 or later\n");
      return;
    }
  
    INKDebug("debug-hello", "Hello World!\n");
  }
  