reactos/modules/rostests/apitests/ws2_32/gethostname.c

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/*
* PROJECT: ReactOS API tests
* LICENSE: LGPL-2.1+ (https://spdx.org/licenses/LGPL-2.1+)
* PURPOSE: Tests for Hostname command and Winsock gethostname() function.
* COPYRIGHT: Copyright 2019 Doug Lyons <douglyons@douglyons.com>
* Copyright 2019 Hermes Belusca-Maito
*/
#include "ws2_32.h"
#include <winreg.h>
#define REG_HOSTNAME_KEY L"System\\CurrentControlSet\\Services\\Tcpip\\Parameters"
#define REG_COMPUTERNAME_KEY L"System\\CurrentControlSet\\Control\\ComputerName\\ComputerName"
HKEY
OpenRegKey(
IN HKEY hRootKey,
IN PCWSTR pszSubKey,
IN DWORD ulOptions)
{
HKEY hKey = NULL;
LONG Error = RegOpenKeyExW(hRootKey, pszSubKey, 0, ulOptions, &hKey);
if (Error == ERROR_SUCCESS)
return hKey;
return NULL;
}
BOOL
GetHostnameFromCommand(
OUT PSTR pszHostnameBuffer,
IN ULONG ulBufferSize)
{
PCSTR file_name = "HostName123.txt";
CHAR cmdline[MAX_PATH] = "hostname > ";
FILE *fp;
INT iResult;
INT len;
PCSTR ptr;
ZeroMemory(pszHostnameBuffer, ulBufferSize * sizeof(CHAR));
/* Run the 'hostname' command, piping out its result to the temporary file */
strcat(cmdline, file_name);
system(cmdline);
/* Open the temporary file in read mode */
fp = fopen(file_name, "r");
ok(fp != NULL, "An error occurred while opening the file.\n");
if (fp == NULL)
return FALSE;
/* Read its contents */
ptr = fgets(pszHostnameBuffer, ulBufferSize * sizeof(CHAR), fp);
ok(ptr != NULL, "An error occurred while reading the file.\n");
if (ptr == NULL)
goto Cleanup;
/* Delete the expected ending line feed character */
len = strlen(pszHostnameBuffer);
if (pszHostnameBuffer[len-1] == '\r' || pszHostnameBuffer[len-1] == '\n')
pszHostnameBuffer[len-1] = ANSI_NULL;
Cleanup:
/* Close and remove the file */
iResult = fclose(fp);
ok(iResult == 0, "An error occurred while closing the file: %i.\n", iResult);
iResult = remove(file_name);
ok(iResult == 0, "An error occurred while deleting the file: %i.\n", iResult);
return (ptr ? TRUE : FALSE);
}
START_TEST(gethostname)
{
INT pos;
HKEY hKeyHN;
DWORD cbData;
LONG Error;
INT hnError;
INT iResult;
WSADATA wsaData;
DWORD uApiHostNameSize;
CHAR szApiHostName[256] = "";
CHAR szHostNameOld[256] = "";
CHAR szHostNameNew[256] = "";
CHAR hostbuffer[256] = "";
/*
* Notes about the retrieval of the computer name on Windows.
*
* - GetComputerName() (equivalently, GetComputerNameEx(ComputerNameNetBIOS))
* retrieves the name cached in the registry value "ComputerName" under
* "System\\CurrentControlSet\\Control\\ComputerName\\ActiveComputerName" .
*
* - GetComputerNameEx(ComputerNameDnsHostname) as well as the 'hostname' command
return the registry value "Hostname" under "System\\CurrentControlSet\\Services\\Tcpip\\Parameters" .
*
* - In case a new computer name is set, its value is cached in the registry value
* "ComputerName" under "System\\CurrentControlSet\\Control\\ComputerName\\ComputerName",
* and also in the registry value "NV Hostname" under "System\\CurrentControlSet\\Services\\Tcpip\\Parameters" .
*/
/* Retrieve the current host name using API */
uApiHostNameSize = _countof(szApiHostName);
if (!GetComputerNameExA(ComputerNameDnsHostname, szApiHostName, &uApiHostNameSize))
{
/* Fail in case of error */
skip("GetComputerNameExA(ComputerNameDnsHostname) failed, error %lu\n", GetLastError());
return;
}
printf("The Hostname from API is '%s'.\n", szApiHostName);
/* Retrieve the current host name using the 'hostname' command */
if (!GetHostnameFromCommand(hostbuffer, _countof(hostbuffer)))
{
/* Fail in case of error */
skip("Error while retrieving the host name using the 'hostname' command!\n");
return;
}
printf("The Hostname from command is '%s'.\n", hostbuffer);
pos = strcmp(szApiHostName, hostbuffer);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "hostbuffer '%s' should have been szApiHostName '%s'.\n", hostbuffer, szApiHostName);
hKeyHN = OpenRegKey(HKEY_LOCAL_MACHINE, REG_HOSTNAME_KEY, KEY_ALL_ACCESS);
ok(hKeyHN != NULL, "Error while opening hostname registry key.\n");
if (hKeyHN == NULL)
return;
/* Get Old Hostname */
szHostNameOld[0] = ANSI_NULL;
cbData = sizeof(szHostNameOld);
Error = RegQueryValueExA(hKeyHN, "Hostname", NULL, NULL, (LPBYTE)szHostNameOld, &cbData);
printf("Hostname from Registry is '%s'.\n", szHostNameOld);
pos = strcmp(szHostNameOld, szApiHostName);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "szApiHostName '%s' should have been szHostNameOld '%s'.\n", szApiHostName, szHostNameOld);
/* Change Hostname in the Registry */
szHostNameNew[0] = ANSI_NULL;
strcat(szHostNameNew, "ROSHOSTNAME1");
cbData = strlen(szHostNameNew) + 1;
Error = RegSetValueExA(hKeyHN, "Hostname", 0, REG_SZ, (LPBYTE)szHostNameNew, cbData);
ok(Error == ERROR_SUCCESS, "Error setting new registry value (%ld).\n", GetLastError());
/* Retrieve the current host name using API */
uApiHostNameSize = _countof(szApiHostName);
if (!GetComputerNameExA(ComputerNameDnsHostname, szApiHostName, &uApiHostNameSize))
{
/* Fail in case of error */
skip("GetComputerNameExA(ComputerNameDnsHostname) failed, error %lu\n", GetLastError());
goto Cleanup;
}
printf("The Hostname from API is '%s'.\n", szApiHostName);
/* Retrieve the current host name using the 'hostname' command */
if (!GetHostnameFromCommand(hostbuffer, _countof(hostbuffer)))
{
/* Fail in case of error */
skip("Error while retrieving the host name using the 'hostname' command!\n");
goto Cleanup;
}
printf("The Hostname from command is '%s'.\n", hostbuffer);
pos = strcmp(szHostNameNew, szApiHostName);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "szApiHostName '%s' should be szHostNameNew '%s'.\n", szApiHostName, szHostNameNew);
pos = strcmp(szHostNameNew, hostbuffer);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "hostbuffer '%s' should have been szHostNameNew '%s'.\n", hostbuffer, szHostNameNew);
/* Reset the original registry entry */
cbData = strlen(szHostNameOld) + 1;
Error = RegSetValueExA(hKeyHN, "Hostname", 0, REG_SZ, (LPBYTE)szHostNameOld, cbData);
ok(Error == ERROR_SUCCESS, "Error resetting new registry value back (%ld).\n", GetLastError());
/*============ Winsock Checks ===============*/
/* Start up Winsock to use gethostname() */
iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
ok(iResult == 0, "Error occurred starting Winsock");
if (iResult != 0)
goto Cleanup;
/* Retrieve gethostname() */
hnError = gethostname(hostbuffer, sizeof(hostbuffer));
ok(!hnError, "Winsock gethostname() Error is '%d'.\n", WSAGetLastError());
/* Display results */
if (!hnError)
printf("Winsock gethostname() is '%s'.\n", hostbuffer);
pos = strcmp(szHostNameOld, hostbuffer);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "szHostNameOld '%s' should be hostbuffer '%s'.\n", szHostNameOld, hostbuffer);
/* Change Hostname in the Registry */
szHostNameNew[0] = ANSI_NULL;
strcat(szHostNameNew, "ROSHOSTNAME1");
cbData = strlen(szHostNameNew) + 1;
Error = RegSetValueExA(hKeyHN, "Hostname", 0, REG_SZ, (LPBYTE)szHostNameNew, cbData);
ok(Error == ERROR_SUCCESS, "Error setting new registry value (%ld).\n", GetLastError());
/* Retrieve gethostname() */
hnError = gethostname(hostbuffer, sizeof(hostbuffer));
ok(!hnError, "Winsock gethostname() Error is '%d'.\n", WSAGetLastError());
/* Display results */
if (!hnError)
printf("Winsock gethostname() is '%s'.\n", hostbuffer);
pos = strcmp(szHostNameNew, hostbuffer);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "szHostNameNew '%s' should be hostbuffer '%s'.\n", szHostNameNew, hostbuffer);
/* Reset the original registry entry */
cbData = strlen(szHostNameOld) + 1;
Error = RegSetValueExA(hKeyHN, "Hostname", 0, REG_SZ, (LPBYTE)szHostNameOld, cbData);
ok(Error == ERROR_SUCCESS, "Error resetting new registry value back (%ld).\n", GetLastError());
/* Retrieve gethostname() */
hnError = gethostname(hostbuffer, sizeof(hostbuffer));
ok(!hnError, "Winsock gethostname() Error is '%d'.\n", WSAGetLastError());
/* Display results */
if (!hnError)
printf("Winsock gethostname() is '%s'.\n", hostbuffer);
pos = strcmp(szHostNameOld, hostbuffer);
printf("The test results were '%s'.\n", pos==0 ? "good" : "bad");
ok(pos == 0, "szHostNameOld '%s' should be hostbuffer '%s'.\n", szHostNameOld, hostbuffer);
Cleanup:
iResult = WSACleanup();
ok(iResult == 0, "WSACleanup error occurred ending Winsock");
Error = RegCloseKey(hKeyHN);
ok(Error == ERROR_SUCCESS, "Error closing registry key (%ld).\n", GetLastError());
return;
}