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Diff for /pegasus/src/Pegasus/Common/System.cpp between version 1.16 and 1.59

version 1.16, 2003/08/12 18:00:11 version 1.59, 2007/09/11 17:56:33
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 //%/////////////////////////////////////////////////////////////////////////////  //%2006////////////////////////////////////////////////////////////////////////
 // //
 // Copyright (c) 2000, 2001, 2002 BMC Software, Hewlett-Packard Company, IBM,  // Copyright (c) 2000, 2001, 2002 BMC Software; Hewlett-Packard Development
 // The Open Group, Tivoli Systems  // Company, L.P.; IBM Corp.; The Open Group; Tivoli Systems.
   // Copyright (c) 2003 BMC Software; Hewlett-Packard Development Company, L.P.;
   // IBM Corp.; EMC Corporation, The Open Group.
   // Copyright (c) 2004 BMC Software; Hewlett-Packard Development Company, L.P.;
   // IBM Corp.; EMC Corporation; VERITAS Software Corporation; The Open Group.
   // Copyright (c) 2005 Hewlett-Packard Development Company, L.P.; IBM Corp.;
   // EMC Corporation; VERITAS Software Corporation; The Open Group.
   // Copyright (c) 2006 Hewlett-Packard Development Company, L.P.; IBM Corp.;
   // EMC Corporation; Symantec Corporation; The Open Group.
 // //
 // Permission is hereby granted, free of charge, to any person obtaining a copy // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to // of this software and associated documentation files (the "Software"), to
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 // //
 //============================================================================== //==============================================================================
 // //
 // Author: Mike Brasher (mbrasher@bmc.com)  
 //  
 // Modified By: Rudy Schuet (rudy.schuet@compaq.com) 11/12/01  
 //                                      added nsk platform support  
 //                              Ramnath Ravindran (Ramnath.Ravindran@compaq.com) 03/21/2002  
 //                                      replaced instances of "| ios::binary" with  
 //                                      PEGASUS_OR_IOS_BINARY  
 //  
 //%///////////////////////////////////////////////////////////////////////////// //%/////////////////////////////////////////////////////////////////////////////
  
 #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM) #if defined(PEGASUS_PLATFORM_ZOS_ZSERIES_IBM)
 #include <Pegasus/Common/Config.h> #include <Pegasus/Common/Config.h>
 #endif #endif
  
   
 #include <fstream> #include <fstream>
 #include <cctype>  // for tolower() #include <cctype>  // for tolower()
 #include <cstring> #include <cstring>
 #include "System.h" #include "System.h"
   #include "Socket.h"
   #include "Network.h"
 #include <Pegasus/Common/PegasusVersion.h> #include <Pegasus/Common/PegasusVersion.h>
   #include <Pegasus/Common/FileSystem.h>
   #include <Pegasus/Common/HostAddress.h>
   #include <Pegasus/Common/Array.h>
  
 #if defined(PEGASUS_OS_TYPE_WINDOWS) #if defined(PEGASUS_OS_TYPE_WINDOWS)
 # include "SystemWindows.cpp" # include "SystemWindows.cpp"
 #elif defined(PEGASUS_OS_TYPE_UNIX)  #elif defined(PEGASUS_OS_TYPE_UNIX) || defined(PEGASUS_OS_VMS)
 # include "SystemUnix.cpp"  # include "SystemPOSIX.cpp"
 #elif defined(PEGASUS_OS_TYPE_NSK)  
 # include "SystemNsk.cpp"  
 #else #else
 # error "Unsupported platform" # error "Unsupported platform"
 #endif #endif
  
 #if defined(PEGASUS_OS_OS400)  
 # include "OS400ConvertChar.h"  
 #endif  
   
 PEGASUS_USING_STD; PEGASUS_USING_STD;
  
 PEGASUS_NAMESPACE_BEGIN PEGASUS_NAMESPACE_BEGIN
  
   Boolean System::bindVerbose = false;
   
 Boolean System::copyFile(const char* fromPath, const char* toPath) Boolean System::copyFile(const char* fromPath, const char* toPath)
 { {
 #if defined(PEGASUS_OS_OS400)  
     AtoE((char *)fromPath);  
     AtoE((char *)toPath);  
 #endif  
   
     ifstream is(fromPath PEGASUS_IOS_BINARY);     ifstream is(fromPath PEGASUS_IOS_BINARY);
     ofstream os(toPath PEGASUS_IOS_BINARY);      fstream os(toPath, ios::out  PEGASUS_OR_IOS_BINARY);
   
 #if defined(PEGASUS_OS_OS400)  
     EtoA((char *)fromPath);  
     EtoA((char *)toPath);  
 #endif  
  
     char c;     char c;
  
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             return false;             return false;
     }     }
  
     return true;      FileSystem::syncWithDirectoryUpdates(os);
       return is.eof();
 } }
  
 // ATTN: Move to platform-specific System implementation files and call  static const Uint8 _toLowerTable[256] =
 // strcasecmp where it is available.  
 Sint32 System::strcasecmp(const char* s1, const char* s2)  
 { {
     while (*s1 && *s2)      0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,
       0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
       0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,
       0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
       0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,
       0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
       0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
       0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
       0x40,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
       0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
       0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
       0x78,0x79,0x7A,0x5B,0x5C,0x5D,0x5E,0x5F,
       0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,
       0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
       0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,
       0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
       0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,
       0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
       0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
       0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
       0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,
       0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
       0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
       0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
       0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,
       0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
       0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,
       0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
       0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,
       0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
       0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,
       0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,
   };
   
   Sint32 System::strcasecmp(const char* s1, const char* s2)
     {     {
         int r = tolower(*s1++) - tolower(*s2++);      // Note: this is faster than glibc strcasecmp().
  
         if (r)      Uint8* p = (Uint8*)s1;
             return r;      Uint8* q = (Uint8*)s2;
     }      int r;
   
       for (;;)
       {
           if ((r = _toLowerTable[p[0]] - _toLowerTable[q[0]]) || !p[0] ||
               (r = _toLowerTable[p[1]] - _toLowerTable[q[1]]) || !p[1] ||
               (r = _toLowerTable[p[2]] - _toLowerTable[q[2]]) || !p[2] ||
               (r = _toLowerTable[p[3]] - _toLowerTable[q[3]]) || !p[3])
               break;
  
     if (*s2)          p += 4;
         return -1;          q += 4;
     else if (*s1)      }
         return 1;  
  
     return 0;      return r;
 } }
  
 // Return the just the file name from the path into basename // Return the just the file name from the path into basename
 char *System::extract_file_name(const char *fullpath, char *basename) char *System::extract_file_name(const char *fullpath, char *basename)
 { {
   char *p;  
   char buff[2048];  
   if (fullpath == NULL)   if (fullpath == NULL)
     {     {
       basename[0] = '\0';       basename[0] = '\0';
       return basename;       return basename;
     }     }
   strcpy(buff, fullpath);  
   for(p = buff + strlen(buff); p >= buff; p--)      for (const char* p = fullpath + strlen(fullpath) - 1; p >= fullpath; p--)
     {     {
       if (*p == '\\' || *p == '/')       if (*p == '\\' || *p == '/')
         {         {
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           return basename;           return basename;
         }         }
     }     }
   
   strcpy(basename, fullpath);   strcpy(basename, fullpath);
   return basename;   return basename;
 } }
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 char *System::extract_file_path(const char *fullpath, char *dirname) char *System::extract_file_path(const char *fullpath, char *dirname)
 { {
   char *p;   char *p;
   char buff[2048];      char buff[4096];
   if (fullpath == NULL)   if (fullpath == NULL)
     {     {
       dirname[0] = '\0';       dirname[0] = '\0';
       return dirname;       return dirname;
     }     }
   strcpy(buff, fullpath);      strncpy(buff, fullpath, sizeof(buff)-1);
       buff[sizeof(buff)-1] =  '\0';
   for(p = buff + strlen(buff); p >= buff; p--)   for(p = buff + strlen(buff); p >= buff; p--)
     {     {
       if (*p == '\\' || *p == '/')       if (*p == '\\' || *p == '/')
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   return dirname;   return dirname;
 } }
  
   Boolean System::getHostIP(const String &hostName, int *af, String &hostIP)
   {
   #ifdef PEGASUS_ENABLE_IPV6
       struct addrinfo *info, hints;
       memset (&hints, 0, sizeof(struct addrinfo));
   
       // Check for valid IPV4 address, if found return ipv4 address
       *af = AF_INET;
       hints.ai_family = *af;
       hints.ai_protocol = IPPROTO_TCP;
       hints.ai_socktype = SOCK_STREAM;
       if (!getAddrInfo(hostName.getCString(), 0, &hints, &info))
       {
           char ipAddress[PEGASUS_INET_ADDRSTR_LEN];
           HostAddress::convertBinaryToText(info->ai_family,
               &(reinterpret_cast<struct sockaddr_in*>(info->ai_addr))->sin_addr,
               ipAddress,
               PEGASUS_INET_ADDRSTR_LEN);
           hostIP = ipAddress;
           freeaddrinfo(info);
           return true;
       }
   
       // Check for valid IPV6 Address.
       *af = AF_INET6;
       hints.ai_family = *af;
       hints.ai_protocol = IPPROTO_TCP;
       hints.ai_socktype = SOCK_STREAM;
       if (!getAddrInfo(hostName.getCString(), 0, &hints, &info))
       {
           char ipAddress[PEGASUS_INET6_ADDRSTR_LEN];
           HostAddress::convertBinaryToText(info->ai_family,
               &(reinterpret_cast<struct sockaddr_in6*>(info->ai_addr))->sin6_addr,
               ipAddress,
               PEGASUS_INET6_ADDRSTR_LEN);
           hostIP = ipAddress;
           freeaddrinfo(info);
           return true;
       }
   
       return false;
   #else
       *af = AF_INET;
       struct hostent* hostEntry;
       struct in_addr inaddr;
       String ipAddress;
       CString hostNameCString = hostName.getCString();
       const char* hostNamePtr = hostNameCString;
   
       char hostEntryBuffer[8192];
       struct hostent hostEntryStruct;
       hostEntry = getHostByName(hostNamePtr, &hostEntryStruct,
           hostEntryBuffer, sizeof (hostEntryBuffer));
   
       if (hostEntry)
       {
           ::memcpy( &inaddr, hostEntry->h_addr,4);
           ipAddress = ::inet_ntoa( inaddr );
           hostIP = ipAddress;
           return true;
       }
       return false;
   #endif
   }
   
   
   #ifdef PEGASUS_ENABLE_IPV6
   Boolean System::isIPv6StackActive()
   {
       SocketHandle ip6Socket;
       if ((ip6Socket = Socket::createSocket(AF_INET6, SOCK_STREAM, IPPROTO_TCP))
           == PEGASUS_INVALID_SOCKET)
       {
           if (getSocketError() == PEGASUS_INVALID_ADDRESS_FAMILY)
           {
               return false;
           }
       }
       else
       {
           Socket::close(ip6Socket);
       }
   
       return true;
   }
   #endif
   
   // ------------------------------------------------------------------------
   // Convert a hostname into a a single host unique integer representation
   // ------------------------------------------------------------------------
   Boolean System::_acquireIP(const char* hostname, int *af, void *dst)
   {
   #ifdef PEGASUS_ENABLE_IPV6
       String ipAddress;
       if(getHostIP(hostname, af, ipAddress))
       {
           HostAddress::convertTextToBinary(*af, ipAddress.getCString(), dst);
           return true;
       }
       return false;
   #else
       *af = AF_INET;
       Uint32 ip = 0xFFFFFFFF;
       if (!hostname) return 0xFFFFFFFF;
   
   ////////////////////////////////////////////////////////////////////////////////
   // This code used to check if the first character of "hostname" was alphabetic
   // to indicate hostname instead of IP address. But RFC 1123, section 2.1,
   // relaxed this requirement to alphabetic character *or* digit. So bug 1462
   // changed the flow here to call inet_addr first to check for a valid IP
   // address in dotted decimal notation. If it's not a valid IP address, then
   // try to validate it as a hostname.
   // RFC 1123 states: The host SHOULD check the string syntactically for a
   // dotted-decimal number before looking it up in the Domain Name System.
   // Hence the call to inet_addr() first.
   ////////////////////////////////////////////////////////////////////////////////
   
       Uint32 tmp_addr = inet_addr((char *) hostname);
       struct hostent* hostEntry;
   
   // Note: 0xFFFFFFFF is actually a valid IP address (255.255.255.255).
   //       A better solution would be to use inet_aton() or equivalent, as
   //       inet_addr() is now considered "obsolete".
   
       if (tmp_addr == 0xFFFFFFFF)  // if hostname is not an IP address
       {
           char hostEntryBuffer[8192];
           struct hostent hostEntryStruct;
           hostEntry = getHostByName(hostname, &hostEntryStruct,
               hostEntryBuffer, sizeof (hostEntryBuffer));
   
           if (!hostEntry)
           {
               // error, couldn't resolve the ip
               memcpy(dst, &ip, sizeof (Uint32));
               return false;
           }
           unsigned char ip_part1,ip_part2,ip_part3,ip_part4;
   
           ip_part1 = hostEntry->h_addr[0];
           ip_part2 = hostEntry->h_addr[1];
           ip_part3 = hostEntry->h_addr[2];
           ip_part4 = hostEntry->h_addr[3];
           ip = ip_part1;
           ip = (ip << 8) + ip_part2;
           ip = (ip << 8) + ip_part3;
           ip = (ip << 8) + ip_part4;
       }
       else    // else hostname *is* a dotted-decimal IP address
       {
           // resolve hostaddr to a real host entry
           // casting to (const char *) as (char *) will work as (void *) too,
           // those it fits all platforms
           char hostEntryBuffer[8192];
           struct hostent hostEntryStruct;
           hostEntry =
               getHostByAddr((const char*) &tmp_addr, sizeof(tmp_addr), AF_INET,
                   &hostEntryStruct, hostEntryBuffer, sizeof (hostEntryBuffer));
   
           if (hostEntry == 0)
           {
               // error, couldn't resolve the ip
               memcpy(dst, &ip, sizeof (Uint32));
               return false;
           }
           else
           {
               unsigned char ip_part1,ip_part2,ip_part3,ip_part4;
   
               ip_part1 = hostEntry->h_addr[0];
               ip_part2 = hostEntry->h_addr[1];
               ip_part3 = hostEntry->h_addr[2];
               ip_part4 = hostEntry->h_addr[3];
               ip = ip_part1;
               ip = (ip << 8) + ip_part2;
               ip = (ip << 8) + ip_part3;
               ip = (ip << 8) + ip_part4;
           }
       }
       memcpy(dst, &ip, sizeof (Uint32));
   
       return true;
   #endif
   }
   
   Boolean System::resolveHostNameAtDNS(
       const char* hostname,
       Uint32* resolvedNameIP)
   {
       struct hostent* hostEntry;
   
       // ask the DNS for hostname resolution to IP address
       // this can mean a time delay for as long as the DNS
       // takes to answer
       char hostEntryBuffer[8192];
       struct hostent hostEntryStruct;
       hostEntry = getHostByName(hostname, &hostEntryStruct,
           hostEntryBuffer, sizeof (hostEntryBuffer));
   
       if (hostEntry == 0)
       {
           // error, couldn't resolve the hostname to an ip address
           return false;
       }
       else
       {
           unsigned char ip_part1,ip_part2,ip_part3,ip_part4;
           ip_part1 = hostEntry->h_addr[0];
           ip_part2 = hostEntry->h_addr[1];
           ip_part3 = hostEntry->h_addr[2];
           ip_part4 = hostEntry->h_addr[3];
           *resolvedNameIP = ip_part1;
           *resolvedNameIP = (*resolvedNameIP << 8) + ip_part2;
           *resolvedNameIP = (*resolvedNameIP << 8) + ip_part3;
           *resolvedNameIP = (*resolvedNameIP << 8) + ip_part4;
       }
       return true;
   }
   
   Boolean System::resolveIPAtDNS(Uint32 ip_addr, Uint32 * resolvedIP)
   {
       struct hostent *entry;
   
       entry = getHostByAddr((const char *) &ip_addr, sizeof(ip_addr), AF_INET);
   
       if (entry == 0)
       {
           // error, couldn't resolve the ip
           return false;
       }
       else
       {
           unsigned char ip_part1,ip_part2,ip_part3,ip_part4;
           ip_part1 = entry->h_addr[0];
           ip_part2 = entry->h_addr[1];
           ip_part3 = entry->h_addr[2];
           ip_part4 = entry->h_addr[3];
           *resolvedIP = ip_part1;
           *resolvedIP = (*resolvedIP << 8) + ip_part2;
           *resolvedIP = (*resolvedIP << 8) + ip_part3;
           *resolvedIP = (*resolvedIP << 8) + ip_part4;
       }
       return true;
   }
   
   
   Boolean System::isLoopBack(int af, void *binIPAddress)
   {
   #ifdef PEGASUS_ENABLE_IPV6
       struct in6_addr ip6 = PEGASUS_IPV6_LOOPBACK_INIT;
   #endif
       Uint32 ip4 = PEGASUS_IPV4_LOOPBACK_INIT;
       switch (af)
       {
   #ifdef PEGASUS_ENABLE_IPV6
           case AF_INET6:
               return !memcmp(&ip6, binIPAddress, sizeof (ip6));
   #endif
           case AF_INET:
               Uint32 n = ntohl( *(Uint32*)binIPAddress);
               return !memcmp(&ip4, &n, sizeof (ip4));
       }
   
       return false;
   }
   
   Boolean System::isLocalHost(const String &hostName)
   {
   // Get all ip addresses on the node and compare them with the given hostname.
   #ifdef PEGASUS_ENABLE_IPV6
       CString csName = hostName.getCString();
       struct addrinfo hints, *res1, *res2, *res1root, *res2root;
       char localHostName[PEGASUS_MAXHOSTNAMELEN];
       gethostname(localHostName, PEGASUS_MAXHOSTNAMELEN);
       Boolean isLocal = false;
   
       memset(&hints, 0, sizeof(hints));
       hints.ai_family = AF_INET;
       hints.ai_socktype = SOCK_STREAM;
       hints.ai_protocol = IPPROTO_TCP;
       res1root = res2root = 0;
       getAddrInfo(csName, 0, &hints, &res1root);
       getAddrInfo(localHostName, 0, &hints, &res2root);
   
       res1 = res1root;
       while (res1 && !isLocal)
       {
           if (isLoopBack(AF_INET,
               &(reinterpret_cast<struct sockaddr_in*>(res1->ai_addr))->sin_addr))
           {
               isLocal = true;
               break;
           }
   
           res2 = res2root;
           while (res2)
           {
               if (!memcmp(
                       &(reinterpret_cast<struct sockaddr_in*>(res1->ai_addr))->
                           sin_addr,
                       &(reinterpret_cast<struct sockaddr_in*>(res2->ai_addr))->
                           sin_addr,
                       sizeof (struct in_addr)))
               {
                   isLocal = true;
                   break;
               }
               res2 = res2->ai_next;
           }
           res1 = res1->ai_next;
       }
       freeaddrinfo(res1root);
       freeaddrinfo(res2root);
       if (isLocal)
       {
           return true;
       }
   
       hints.ai_family = AF_INET6;
       res1root = res2root = 0;
       getAddrInfo(csName, 0, &hints, &res1root);
       getAddrInfo(localHostName, 0, &hints, &res2root);
   
       res1 = res1root;
       while (res1 && !isLocal)
       {
           if (isLoopBack(
                   AF_INET6,
                   &(reinterpret_cast<struct sockaddr_in6*>(res1->ai_addr))->
                       sin6_addr))
           {
               isLocal = true;
               break;
           }
   
           res2 = res2root;
           while (res2)
           {
               if (!memcmp(
                       &(reinterpret_cast<struct sockaddr_in6*>(res1->ai_addr))->
                           sin6_addr,
                       &(reinterpret_cast<struct sockaddr_in6*>(res2->ai_addr))->
                           sin6_addr,
                       sizeof (struct in6_addr)))
               {
                   isLocal = true;
                   break;
               }
               res2 = res2->ai_next;
           }
           res1 = res1->ai_next;
       }
       freeaddrinfo(res1root);
       freeaddrinfo(res2root);
   
       return isLocal;
   #else
   
       // differentiate between a dotted IP address given
       // and a real hostname given
       CString csName = hostName.getCString();
       char cc_hostname[PEGASUS_MAXHOSTNAMELEN];
       strcpy(cc_hostname, (const char*) csName);
       Uint32 tmp_addr = 0xFFFFFFFF;
       Boolean hostNameIsIPNotation;
   
       // Note: Platforms already supporting the inet_aton()
       //       should define their platform here,
       //        as this is the superior way to work
   #if defined(PEGASUS_OS_LINUX) || \
       defined(PEGASUS_OS_AIX) || \
       defined(PEGASUS_OS_HPUX) || \
       defined(PEGASUS_OS_PASE)
   
       struct in_addr inaddr;
       // if inet_aton failed(return=0),
       // we do not have a valip IP address (x.x.x.x)
       int atonSuccess = inet_aton(cc_hostname, &inaddr);
       if (atonSuccess == 0) hostNameIsIPNotation = false;
       else
       {
           hostNameIsIPNotation = true;
           tmp_addr = inaddr.s_addr;
       }
   #else
       // Note: 0xFFFFFFFF is actually a valid IP address (255.255.255.255).
       //       A better solution would be to use inet_aton() or equivalent, as
       //       inet_addr() is now considered "obsolete".
       // Note: inet_aton() not yet supported on all Pegasus platforms
       tmp_addr = inet_addr((char *) cc_hostname);
       if (tmp_addr == 0xFFFFFFFF) hostNameIsIPNotation = false;
       else hostNameIsIPNotation = true;
   #endif
   
       if (!hostNameIsIPNotation)  // if hostname is not an IP address
       {
           // localhost ?
           if (String::equalNoCase(hostName,String("localhost"))) return true;
           char localHostName[PEGASUS_MAXHOSTNAMELEN];
           CString cstringLocalHostName = System::getHostName().getCString();
           strcpy(localHostName, (const char*) cstringLocalHostName);
           // given hostname equals what system returns as local hostname ?
           if (String::equalNoCase(hostName,localHostName)) return true;
           Uint32 hostIP;
           // bail out if hostname unresolveable
           if (!System::resolveHostNameAtDNS(cc_hostname, &hostIP)) return false;
           // lets see if the IP is defined on one of the network interfaces
           // this can help us avoid another call to DNS
           if (System::isIpOnNetworkInterface(hostIP)) return true;
           // need to check if the local hosts name is possibly
           // registered at the DNS with the IP address equal resolvedNameIP
           Uint32 localHostIP;
           if (!System::resolveHostNameAtDNS(localHostName, &localHostIP))
               return false;
           if (localHostIP == hostIP) return true;
       }
       else
       {   // hostname is an IP address
           // 127.0.0.1 is always the loopback
           // inet_addr returns network byte order
           if (tmp_addr == htonl(0x7F000001)) return true;
           // IP defined on a local AF_INET network interface
           if (System::isIpOnNetworkInterface(tmp_addr)) return true;
           // out of luck so far, lets ask the DNS what our IP is
           // and check against what we got
           Uint32 localHostIP;
           if (!System::resolveHostNameAtDNS(
                   (const char*) System::getHostName().getCString(), &localHostIP))
               return false;
           if (localHostIP == tmp_addr) return true;
           // not yet, sometimes resolving the IP address we got against the DNS
           // can solve the problem
           // casting to (const char *) as (char *) will work as (void *) too,
           // those it fits all platforms
           Uint32 hostIP;
           if (!System::resolveIPAtDNS(tmp_addr, &hostIP)) return false;
           if (hostIP == localHostIP) return true;
       }
       return false;
   #endif
   }
   
   struct hostent* System::getHostByName(
       const char* name,
       struct hostent* he,
       char* buf,
       size_t len)
   {
       int hostEntryErrno = 0;
       struct hostent* hostEntry = 0;
       unsigned int maxTries = 5;
   
       do
       {
   #if defined(PEGASUS_OS_LINUX)
           gethostbyname_r(name,
               he,
               buf,
               len,
               &hostEntry,
               &hostEntryErrno);
   #elif defined(PEGASUS_OS_SOLARIS)
           hostEntry = gethostbyname_r((char *)name,
                           he,
                           buf,
                           len,
                           &hostEntryErrno);
   #elif defined(PEGASUS_OS_ZOS)
           char hostName[PEGASUS_MAXHOSTNAMELEN + 1];
           if (String::equalNoCase("localhost", String(name)))
           {
               gethostname(hostName, PEGASUS_MAXHOSTNAMELEN);
               hostName[sizeof(hostName) - 1] = 0;
               hostEntry = gethostbyname(hostName);
           }
           else
           {
               hostEntry = gethostbyname((char *)name);
           }
           hostEntryErrno = h_errno;
   #else
           hostEntry = gethostbyname((char *)name);
           hostEntryErrno = h_errno;
   #endif
       } while (hostEntry == 0 && hostEntryErrno == TRY_AGAIN &&
                maxTries-- > 0);
   
       return hostEntry;
   }
   
   struct hostent* System::getHostByAddr(
       const char *addr,
       int len,
       int type,
       struct hostent* he,
       char* buf,
       size_t buflen)
   {
       int hostEntryErrno = 0;
       struct hostent* hostEntry = 0;
       unsigned int maxTries = 5;
   
       do
       {
   #if defined(PEGASUS_OS_LINUX)
           gethostbyaddr_r(addr,
               len,
               type,
               he,
               buf,
               buflen,
               &hostEntry,
               &hostEntryErrno);
   #elif defined(PEGASUS_OS_SOLARIS)
           char hostEntryBuffer[8192];
           struct hostent hostEntryStruct;
   
           hostEntry = gethostbyaddr_r(addr,
                           len,
                           type,
                           he,
                           buf,
                           buflen,
                           &hostEntryErrno);
   #else
           hostEntry = gethostbyaddr(addr,
                           len,
                           type);
           hostEntryErrno = h_errno;
   #endif
       } while (hostEntry == 0 && hostEntryErrno == TRY_AGAIN &&
                maxTries-- > 0);
   
       return hostEntry;
   }
   
   int System::getAddrInfo(
       const char *hostname,
       const char *servname,
       const struct addrinfo *hints,
       struct addrinfo **res)
   {
       int rc = 0;
       unsigned int maxTries = 5;
   
       while ((rc = getaddrinfo(hostname,
                        servname,
                        hints,
                        res)) == EAI_AGAIN &&
              maxTries-- > 0)
           ;
       return rc;
   }
   
   int System::getNameInfo(
       const struct sockaddr *sa,
       size_t salen,
       char *host,
       size_t hostlen,
       char *serv,
       size_t servlen,
       int flags)
   {
       int rc = 0;
       unsigned int maxTries = 5;
   
       while ((rc = getnameinfo(sa,
                        salen,
                        host,
                        hostlen,
                        serv,
                        servlen,
                        flags)) == EAI_AGAIN &&
              maxTries-- > 0)
           ;
       return rc;
   }
   
   
   // System ID constants for Logger::put and Logger::trace
   const String System::CIMLISTENER = "cimlistener"; // Listener systme ID
   
 PEGASUS_NAMESPACE_END PEGASUS_NAMESPACE_END


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