c++ - Difference between GetExtendedUdpTable and netstat result -

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i used code opened udp ports , application use every port.

dword (winapi *pgetextendedudptable)(   pvoid pudptable,   pdword pdwsize,   bool border,   ulong ulaf,   udp_table_class tableclass,   ulong reserved );     mib_udptable_owner_pid *pudpinfo;     mib_udprow_owner_pid *owner;     dword size;     dword dwresult;      hmodule hlib = loadlibrary((lpcwstr)"iphlpapi.dll");      pgetextendedudptable = (dword (winapi *)(pvoid,pdword,bool,ulong,udp_table_class,ulong))         getprocaddress(hlib, "getextendedtcptable");      if ( !pgetextendedudptable )     {         //printf("could not load iphlpapi.dll. application windows xp sp2 , up.\n");          return "could not load iphlpapi.dll. application windows xp sp2 , up.\n";     }      dwresult = pgetextendedudptable(null,       &size, false, af_inet, (udp_table_class)5, 0);     pudpinfo = (mib_udptable_owner_pid*)malloc(size);     dwresult = pgetextendedudptable(pudpinfo,   &size, false, af_inet, (udp_table_class)5, 0); //    if (dwresult != no_error)     {         printf("couldn't our ip table");          return "couldn't our ip table";     }    (dword dwloop = 0; dwloop < pudpinfo->dwnumentries; dwloop++)     {         owner = &pudpinfo->table[dwloop];               applicationname = getnamebypid(owner->dwowningpid);         openedport = convertint(ntohs(owner->dwlocalport));         localadress = convertint(ntohs(owner->dwlocaladdr));    }

but, haven't same result netstat -ano.in code, have port 0 more 10 times in netstat command port 0 doesn't exist.

you have udp everywhere function you're querying tcp 1 (getextendedtcptable).


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