diff options
| -rw-r--r-- | CHANGES | 14 | ||||
| -rw-r--r-- | ares_gethostbyaddr.c | 21 | ||||
| -rw-r--r-- | ares_gethostbyname.c | 22 | ||||
| -rw-r--r-- | ares_private.h | 4 |
4 files changed, 48 insertions, 13 deletions
@@ -1,5 +1,19 @@ Changelog for the c-ares project +* September 26 + +- Dominick Meglio patched: C-ares on Windows assumed that the HOSTS file is + located in a static location. It assumed + C:\Windows\System32\Drivers\Etc. This is a poor assumption to make. In fact, + the location of the HOSTS file can be changed via a registry setting. + + There is a key called DatabasePath which specifies the path to the HOSTS + file: + http://www.microsoft.com/technet/itsolutions/network/deploy/depovg/tcpip2k.mspx + + The patch will make c-ares correctly consult the registry for the location + of this file. + * August 29 - Gisle Vanem fixed the MSVC build files. diff --git a/ares_gethostbyaddr.c b/ares_gethostbyaddr.c index f44b3fb..978beba 100644 --- a/ares_gethostbyaddr.c +++ b/ares_gethostbyaddr.c @@ -150,12 +150,23 @@ static int file_lookup(struct in_addr *addr, struct hostent **host) char PATH_HOSTS[MAX_PATH]; if (IsNT) { - GetSystemDirectory(PATH_HOSTS, MAX_PATH); - strcat(PATH_HOSTS, PATH_HOSTS_NT); - } else { + char tmp[MAX_PATH]; + HKEY hkeyHosts; + + if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0, KEY_READ, &hkeyHosts) + == ERROR_SUCCESS) + { + DWORD dwLength = MAX_PATH; + RegQueryValueEx(hkeyHosts, DATABASEPATH, NULL, NULL, tmp, + &dwLength); + ExpandEnvironmentStrings(tmp, PATH_HOSTS, MAX_PATH); + RegCloseKey(hkeyHosts); + } + } + else GetWindowsDirectory(PATH_HOSTS, MAX_PATH); - strcat(PATH_HOSTS, PATH_HOSTS_9X); - } + + strcat(PATH_HOSTS, WIN_PATH_HOSTS); #elif defined(WATT32) extern const char *_w32_GetHostsFile (void); diff --git a/ares_gethostbyname.c b/ares_gethostbyname.c index b39d53b..decac55 100644 --- a/ares_gethostbyname.c +++ b/ares_gethostbyname.c @@ -220,15 +220,25 @@ static int file_lookup(const char *name, struct hostent **host) int status; #ifdef WIN32 - char PATH_HOSTS[MAX_PATH]; if (IsNT) { - GetSystemDirectory(PATH_HOSTS, MAX_PATH); - strcat(PATH_HOSTS, PATH_HOSTS_NT); - } else { + char tmp[MAX_PATH]; + HKEY hkeyHosts; + + if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0, KEY_READ, &hkeyHosts) + == ERROR_SUCCESS) + { + DWORD dwLength = MAX_PATH; + RegQueryValueEx(hkeyHosts, DATABASEPATH, NULL, NULL, tmp, + &dwLength); + ExpandEnvironmentStrings(tmp, PATH_HOSTS, MAX_PATH); + RegCloseKey(hkeyHosts); + } + } + else GetWindowsDirectory(PATH_HOSTS, MAX_PATH); - strcat(PATH_HOSTS, PATH_HOSTS_9X); - } + + strcat(PATH_HOSTS, WIN_PATH_HOSTS); #elif defined(WATT32) extern const char *_w32_GetHostsFile (void); diff --git a/ares_private.h b/ares_private.h index 0b16dc0..06f8768 100644 --- a/ares_private.h +++ b/ares_private.h @@ -46,8 +46,8 @@ #define WIN_NS_NT_KEY "System\\CurrentControlSet\\Services\\Tcpip\\Parameters" #define NAMESERVER "NameServer" #define DHCPNAMESERVER "DhcpNameServer" -#define PATH_HOSTS_NT "\\drivers\\etc\\hosts" -#define PATH_HOSTS_9X "\\hosts" +#define DATABASEPATH "DatabasePath" +#define WIN_PATH_HOSTS "\\hosts" #elif defined(WATT32) |