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r6952@Kushana: nickm | 2006-07-28 11:09:37 -0400

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Add completely untested find-my-nameservers code for win32.


svn:r6952
This commit is contained in:
Nick Mathewson 2006-07-31 17:59:11 +00:00
parent 8112829a9b
commit 8ba913c660
1 changed files with 92 additions and 23 deletions
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115
src/or/eventdns.c
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@ -1237,29 +1237,6 @@ eventdns_nameserver_ip_add(const char *ip_as_string) {
return eventdns_nameserver_add(ina.s_addr);
}
/* Add multiple nameservers from a space-or-comma-separated list. */
static int
eventdns_nameserver_ip_add_line(const char *ips) {
const char *addr;
char *buf;
int r;
while (*ips) {
while (ISSPACE(*ips) || *ips == ',' || *ips == '\t')
++ips;
addr = ips;
while (ISDIGIT(*ips) || *ips == '.')
++ips;
buf = malloc(ips-addr+1);
if (!buf) return 4;
memcpy(buf, addr, ips-addr);
buf[ips-addr] = '\0';
r = eventdns_nameserver_ip_add(buf);
free(buf);
if (r) return r;
}
return 0;
}
// insert into the tail of the queue
static void
eventdns_request_insert(struct request *req, struct request **head) {
@ -1744,9 +1721,35 @@ out1:
}
#ifdef MS_WINDOWS
// Add multiple nameservers from a space-or-comma-separated list.
static int
eventdns_nameserver_ip_add_line(const char *ips) {
const char *addr;
char *buf;
int r;
while (*ips) {
while (ISSPACE(*ips) || *ips == ',' || *ips == '\t')
++ips;
addr = ips;
while (ISDIGIT(*ips) || *ips == '.')
++ips;
buf = malloc(ips-addr+1);
if (!buf) return 4;
memcpy(buf, addr, ips-addr);
buf[ips-addr] = '\0';
r = eventdns_nameserver_ip_add(buf);
free(buf);
if (r) return r;
}
return 0;
}
// Use the windows GetNetworkParams interface in iphlpapi.dll to
// figure out what our nameservers are.
static int
load_nameservers_with_getnetworkparams(void)
{
// Based on MSDN examples and inspection of c-ares code.
FIXED_INFO *fixed;
HMODULE handle = 0;
ULONG size = sizeof(FIXED_INFO);
@ -1798,4 +1801,70 @@ load_nameservers_with_getnetworkparams(void)
return status;
}
static int
config_nameserver_from_reg_key(HKEY key, const char *subkey)
{
char *buf;
DWORD bufsz = 0, type = 0;
int status = 0;
if (RegQueryValueEx(key, subkey, 0, &type, NULL, &bufsz)
!= ERROR_MORE_DATA)
return -1;
if (!(buf = malloc(bufsz)))
return -1;
if (RegQueryValueEx(key, subkey, 0, &type, (LPBYTE)buf, &bufsz)
== ERROR_SUCCESS && bufsz > 1) {
status = eventdns_nameserver_ip_add_line(buf);
}
free(buf);
return status;
}
static int
load_nameservers_from_registry(void)
{
int found = 0;
#define TRY(k, name) \
if (!found && config_nameserver_from_reg_key(k,name) == 0) { \
log("Found nameservers in %s/%s",#k,name); \
found = 1; \
}
if (IS_NT()) {
HKEY nt_key = 0, interfaces_key = 0;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_NT_KEY, 0,
KEY_READ, &nt_key) != ERROR_SUCCESS)
return -1;
RegOpenKeyEx(nt_key, "Interfaces", 0,
KEY_QUERY_VALUE|KEY_ENUMERATE_SUBKEYS,
&interfaces_key);
TRY(nt_key, NAMESERVER);
TRY(nt_key, DHCPNAMESERVER);
TRY(interfaces_key, NAMESERVER);
TRY(interfaces_key, DHCPNAMESERVER);
RegCloseKey(interfaces_key);
RegCloseKey(nt_key);
} else {
HKEY win_key = 0;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, WIN_NS_9X, 0,
KEY_READ, &win_key) != ERROR_SUCCESS)
return -1;
TRY(win_key, NAMESERVER);
RegCloseKey(win_key);
}
return found ? 0 : -1;
#undef TRY
}
int
eventdns_config_windows_nameservers(void)
{
if (load_nameservers_with_getnetworkparams() == 0)
return 0;
return load_nameservers_from_registry();
}
#endif