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   2  *
   3  *  Data Differential YATL (i.e. libtest)  library
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   5  *  Copyright (C) 2012 Data Differential, http://datadifferential.com/
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  36
  37 #include <config.h>
  38 #include <libtest/common.h>
  39
  40 #include <cassert>
  41 #include <cstdlib>
  42 #include <cstring>
  43 #include <ctime>
  44 #include <fnmatch.h>
  45 #include <iostream>
  46 #include <sys/socket.h>
  47 #include <sys/stat.h>
  48 #include <sys/time.h>
  49 #include <sys/types.h>
  50 #include <sys/wait.h>
  51 #include <unistd.h>
  52
  53 #include <utility>
  54 #include <vector>
  55
  56 #include <signal.h>
  57
  58 #include <libtest/signal.h>
  59
  60 #ifndef __INTEL_COMPILER
  61 #pragma GCC diagnostic ignored "-Wold-style-cast"
  62 #endif
  63
  64 using namespace libtest;
  65
  66 struct socket_st {
  67   typedef std::vector< std::pair< int, in_port_t> > socket_port_t;
  68   socket_port_t _pair;
  69
  70   void release(in_port_t _arg)
  71   {
  72     for(socket_port_t::iterator iter= _pair.begin();
  73         iter != _pair.end();
  74         iter++)
  75     {
  76       if ((*iter).second == _arg)
  77       {
  78         close((*iter).first);
  79       }
  80     }
  81   }
  82
  83   ~socket_st()
  84   {
  85     for(socket_port_t::iterator iter= _pair.begin();
  86         iter != _pair.end();
  87         iter++)
  88     {
  89       close((*iter).first);
  90     }
  91   }
  92 };
  93
  94 static socket_st all_socket_fd;
  95
  96 static in_port_t global_port= 0;
  97
  98 namespace libtest {
  99
 100 in_port_t default_port()
 101 {
 102   if (global_port == 0)
 103   {
 104     global_port= get_free_port();
 105   }
 106
 107   return global_port;
 108 }
 109
 110 void release_port(in_port_t arg)
 111 {
 112   all_socket_fd.release(arg);
 113 }
 114
 115 in_port_t get_free_port()
 116 {
 117   in_port_t ret_port= in_port_t(0);
 118
 119   int retries= 1024;
 120
 121   while (retries--)
 122   {
 123     int sd;
 124     if ((sd= socket(AF_INET, SOCK_STREAM, 0)) != -1)
 125     {
 126       int optval= 1;
 127       if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval)) != -1)
 128       {
 129         struct sockaddr_in sin;
 130         sin.sin_port= 0;
 131         sin.sin_addr.s_addr= 0;
 132         sin.sin_addr.s_addr= INADDR_ANY;
 133         sin.sin_family= AF_INET;
 134
 135         if (bind(sd, (struct sockaddr *)&sin,sizeof(struct sockaddr_in) ) != -1)
 136         {
 137           socklen_t addrlen= sizeof(sin);
 138
 139           if (getsockname(sd, (struct sockaddr *)&sin, &addrlen) != -1)
 140           {
 141             ret_port= sin.sin_port;
 142           }
 143         }
 144       }
 145
 146       all_socket_fd._pair.push_back(std::make_pair(sd, ret_port));
 147     }
 148
 149     if (ret_port > 1024)
 150     {
 151       break;
 152     }
 153   }
 154
 155   // We handle the case where if we max out retries, we still abort.
 156   if (ret_port <= 1024)
 157   {
 158     fatal_message("No port could be found");
 159   }
 160
 161   return ret_port;
 162 }
 163
 164 } // namespace libtest