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Comment on how we came up with this code, and comment it

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git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@7116 e03df62e-2008-0410-955e-edbf42e46eb7
This commit is contained in:
brain 2007-05-22 20:36:53 +00:00
parent e8aed79a4b
commit 3ee9f47ac1
1 changed files with 9 additions and 2 deletions
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11
win/inspircd_win32wrapper.cpp
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@ -368,12 +368,15 @@ void CloseIPC()
}
/* These three functions were created from looking at how ares does it
* (...and they look far tidier in C++)
*/
/* Get active nameserver */
bool GetNameServer(HKEY regkey, const char *key, char* &output)
{
/* Test for the size we need */
DWORD size = 0;
DWORD result = RegQueryValueEx(regkey, key, 0, NULL, NULL, &size);
if (((result != ERROR_SUCCESS) && (result != ERROR_MORE_DATA)) || (!size))
return false;
@ -387,6 +390,7 @@ bool GetNameServer(HKEY regkey, const char *key, char* &output)
return true;
}
/* Check a network interface for its nameserver */
bool GetInterface(HKEY regkey, const char *key, char* &output)
{
char buf[39];
@ -414,8 +418,10 @@ std::string FindNameServerWin()
HKEY top, key;
char* dns = NULL;
/* Lets see if the correct registry hive and tree exist */
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, "System\\CurrentControlSet\\Services\\Tcpip\\Parameters", 0, KEY_READ, &top) == ERROR_SUCCESS)
{
/* If they do, attempt to get the nameserver name */
RegOpenKeyEx(top, "Interfaces", 0, KEY_QUERY_VALUE|KEY_ENUMERATE_SUB_KEYS, &key);
if ((GetNameServer(top, "NameServer", dns)) || (GetNameServer(top, "DhcpNameServer", dns))
|| (GetInterface(key, "NameServer", dns)) || (GetInterface(key, "DhcpNameServer", dns)))
@ -431,3 +437,4 @@ std::string FindNameServerWin()
}
return returnval;
}