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Allow dns hook to fail a resolve and add domains

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This lets people with crap ISPs that resolve domains
that they shouldn't to use the game without
changing their DNS server
This commit is contained in:
Will Toohey 2019-11-17 15:08:25 +10:00
parent 9f933bb371
commit 4bc7eee909
3 changed files with 46 additions and 5 deletions
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35
hooklib/dns.c
View File

@ -156,7 +156,6 @@ HRESULT dns_hook_push(const wchar_t *from_src, const wchar_t *to_src)
wchar_t *to;
assert(from_src != NULL);
assert(to_src != NULL);
to = NULL;
from = NULL;
@ -172,12 +171,14 @@ HRESULT dns_hook_push(const wchar_t *from_src, const wchar_t *to_src)
goto end;
}
to = _wcsdup(to_src);
if(to_src != NULL) {
to = _wcsdup(to_src);
if (to == NULL) {
hr = E_OUTOFMEMORY;
if (to == NULL) {
hr = E_OUTOFMEMORY;
goto end;
goto end;
}
}
newmem = realloc(
@ -250,6 +251,13 @@ static DNS_STATUS WINAPI hook_DnsQuery_A(
pos = &dns_hook_entries[i];
if (_wcsicmp(wstr, pos->from) == 0) {
if(pos->to == NULL) {
LeaveCriticalSection(&dns_hook_lock);
hr = HRESULT_FROM_WIN32(DNS_ERROR_RCODE_NAME_ERROR);
goto end;
}
wcstombs_s(&str_c, NULL, 0, pos->to, 0);
str = malloc(str_c * sizeof(char));
@ -307,6 +315,11 @@ static DNS_STATUS WINAPI hook_DnsQuery_W(
pos = &dns_hook_entries[i];
if (_wcsicmp(pszName, pos->from) == 0) {
if(pos->to == NULL) {
LeaveCriticalSection(&dns_hook_lock);
return HRESULT_FROM_WIN32(DNS_ERROR_RCODE_NAME_ERROR);
}
pszName = pos->to;
break;
@ -346,6 +359,11 @@ static DNS_STATUS WINAPI hook_DnsQueryEx(
pos = &dns_hook_entries[i];
if (_wcsicmp(pRequest->QueryName, pos->from) == 0) {
if(pos->to == NULL) {
LeaveCriticalSection(&dns_hook_lock);
return HRESULT_FROM_WIN32(DNS_ERROR_RCODE_NAME_ERROR);
}
pRequest->QueryName = pos->to;
break;
@ -408,6 +426,13 @@ static int WSAAPI hook_getaddrinfo(
pos = &dns_hook_entries[i];
if (_wcsicmp(wstr, pos->from) == 0) {
if(pos->to == NULL) {
LeaveCriticalSection(&dns_hook_lock);
result = EAI_NONAME;
goto end;
}
wcstombs_s(&str_c, NULL, 0, pos->to, 0);
str = malloc(str_c * sizeof(char));

1
hooklib/dns.h
View File

@ -4,5 +4,6 @@
#include <stddef.h>
// if to_src is NULL, all lookups for from_src will fail
HRESULT dns_hook_push(const wchar_t *from_src, const wchar_t *to_src);

15
platform/dns.c
View File

@ -64,5 +64,20 @@ HRESULT dns_platform_hook_init(const struct dns_config *cfg)
return hr;
}
// if your ISP resolves bad domains, it will kill the network. These 2
// *cannot* resolve
hr = dns_hook_push(L"mobirouter.loc", NULL);
if (FAILED(hr)) {
return hr;
}
hr = dns_hook_push(L"dslrouter.loc", NULL);
if (FAILED(hr)) {
return hr;
}
return S_OK;
}