static jdns_string_t *reg_readString(HKEY hk, const char *subkey)
{
char *buf;
DWORD bufsize;
int ret;
jdns_string_t *str = 0;
bufsize = 1024;
buf = (char *)jdns_alloc((int)bufsize);
if(!buf)
return 0;
ret = RegQueryValueExA(hk, subkey, 0, 0, (LPBYTE)buf, &bufsize);
if(ret == ERROR_MORE_DATA)
{
buf = (char *)jdns_realloc(buf, bufsize);
if(!buf)
{
jdns_free(buf);
return 0;
}
ret = RegQueryValueExA(hk, subkey, 0, 0, (LPBYTE)buf, &bufsize);
}
if(ret == ERROR_SUCCESS)
{
str = jdns_string_new();
jdns_string_set_cstr(str, (char *)buf);
}
jdns_free(buf);
return str;
}
static jdns_dnsparams_t *dnsparams_get_winsys()
{
jdns_dnsparams_t *params;
GetNetworkParamsFunc myGetNetworkParams;
DWORD ret;
HINSTANCE lib;
jdns_address_t *addr;
jdns_string_t *str;
IP_ADDR_STRING *ipstr;
lib = LoadLibraryA("iphlpapi");
if(!lib)
return 0;
params = 0;
myGetNetworkParams = (GetNetworkParamsFunc)GetProcAddress(lib, "GetNetworkParams");
if(myGetNetworkParams)
{
ULONG bufsize = 0;
ret = myGetNetworkParams(0, &bufsize);
if(ret == ERROR_BUFFER_OVERFLOW)
{
FIXED_INFO *info = (FIXED_INFO *)jdns_alloc((int)bufsize);
ret = myGetNetworkParams(info, &bufsize);
if(ret == ERROR_SUCCESS)
{
params = jdns_dnsparams_new();
ipstr = &info->DnsServerList;
while(ipstr)
{
addr = jdns_address_new();
if(jdns_address_set_cstr(addr, (char *)ipstr->IpAddress.String))
jdns_dnsparams_append_nameserver(params, addr, JDNS_UNICAST_PORT);
jdns_address_delete(addr);
ipstr = ipstr->Next;
}
str = jdns_string_new();
jdns_string_set_cstr(str, info->DomainName);
if(str->size > 0)
jdns_dnsparams_append_domain(params, str);
jdns_string_delete(str);
}
jdns_free(info);
}
}
FreeLibrary(lib);
return params;
}
static jdns_dnsparams_t *dnsparams_get_unixsys()
{
int n;
jdns_dnsparams_t *params;
#ifdef JDNS_MODERN_RES_API
struct __res_state res;
memset(&res, 0, sizeof(struct __res_state));
n = res_ninit(&res);
#define RESVAR res
#else
n = my_res_init();
#define RESVAR _res
#endif
params = jdns_dnsparams_new();
// error initializing?
if(n == -1)
return params;
#ifdef USE_INDEP_EXT
for(n = 0; n < MAXNS && n < RESVAR.nscount; ++n)
{
struct sockaddr_in *sa = (struct sockaddr_in*)&(_res_ext.nsaddr_list[n]);
jdns_address_t *addr = jdns_address_new();
if (sa->sin_family = AF_INET6) {
struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
jdns_address_set_ipv6(addr, sa6->sin6_addr.s6_addr);
} else {
jdns_address_set_ipv4(addr, ntohl(sa->sin_addr.s_addr));
}
jdns_dnsparams_append_nameserver(params, addr, JDNS_UNICAST_PORT);
jdns_address_delete(addr);
}
#else
// nameservers - ipv6
#ifdef __GLIBC__
for(n = 0; n < MAXNS; ++n)
#else
for(n = 0; n < MAXNS && n < RESVAR._u._ext.nscount; ++n)
#endif
{
jdns_address_t *addr;
struct sockaddr_in6 *sa6;
#ifdef USE_EXTEXT
// seems _ext.ext can be null in some cases...
if(RESVAR._u._ext.ext == NULL)
break;
sa6 = ((struct sockaddr_in6 *)RESVAR._u._ext.ext) + n;
#else
sa6 = RESVAR._u._ext.nsaddrs[n];
#endif
if(sa6 == NULL)
continue;
addr = jdns_address_new();
jdns_address_set_ipv6(addr, sa6->sin6_addr.s6_addr);
jdns_dnsparams_append_nameserver(params, addr, JDNS_UNICAST_PORT);
jdns_address_delete(addr);
}
// nameservers - ipv4
#ifdef __GLIBC__
int ns4count = RESVAR.nscount - RESVAR._u._ext.nscount6;
for(n = 0; n < MAXNS && n < ns4count; ++n)
#else
for(n = 0; n < MAXNS && n < RESVAR.nscount; ++n)
#endif
{
jdns_address_t *addr = jdns_address_new();
jdns_address_set_ipv4(addr, ntohl(RESVAR.nsaddr_list[n].sin_addr.s_addr));
jdns_dnsparams_append_nameserver(params, addr, JDNS_UNICAST_PORT);
jdns_address_delete(addr);
}
#endif
// domain name
if(strlen(RESVAR.defdname) > 0)
{
jdns_string_t *str;
jdns_string_t *p;
str = jdns_string_new();
jdns_string_set_cstr(str, RESVAR.defdname);
p = string_tolower(str);
jdns_string_delete(str);
str = p;
jdns_dnsparams_append_domain(params, str);
jdns_string_delete(str);
}
// search list
#ifdef MAXDFLSRCH
for(n = 0; n < MAXDFLSRCH && RESVAR.dnsrch[n]; ++n)
{
if(strlen(RESVAR.dnsrch[n]) > 0)
{
jdns_string_t *str;
jdns_string_t *p;
str = jdns_string_new();
jdns_string_set_cstr(str, RESVAR.dnsrch[n]);
p = string_tolower(str);
jdns_string_delete(str);
str = p;
// don't add dups
if(!dnsparams_have_domain(params, str))
jdns_dnsparams_append_domain(params, str);
jdns_string_delete(str);
}
}
#endif
return params;
}
static jdns_string_t *string_simplify(const jdns_string_t *in)
{
int n;
int pos;
int total;
unsigned char *out;
int outlen;
jdns_string_t *outstr;
jdns_stringlist_t *wordlist;
// gather words and total of lengths
pos = 0;
total = 0;
wordlist = jdns_stringlist_new();
while(1)
{
jdns_string_t *word;
unsigned char *str = string_getnextword(in->data, in->size, pos, &pos);
if(!str)
break;
word = jdns_string_new();
jdns_string_set_cstr(word, (char *)str);
jdns_free(str);
jdns_stringlist_append(wordlist, word);
total += word->size;
jdns_string_delete(word);
}
if(total == 0)
{
jdns_stringlist_delete(wordlist);
outstr = jdns_string_new();
jdns_string_set_cstr(outstr, "");
return outstr;
}
// we need to allocate space for total lengths and wordcount-1 spaces
outlen = total + (wordlist->count - 1);
out = (unsigned char *)jdns_alloc(outlen);
// lay out the words
pos = 0;
for(n = 0; n < wordlist->count; ++n)
{
unsigned char *data = wordlist->item[n]->data;
int size = wordlist->item[n]->size;
memcpy(out + pos, data, size);
pos += size;
// if this is not the last word, append a space
if(n + 1 < wordlist->count)
out[pos++] = ' ';
}
jdns_stringlist_delete(wordlist);
outstr = jdns_string_new();
jdns_string_set(outstr, out, outlen);
jdns_free(out);
return outstr;
}
static jdns_dnsparams_t *dnsparams_get_unixsys()
{
int n;
jdns_dnsparams_t *params;
#ifdef JDNS_MODERN_RES_API
struct __res_state res;
memset(&res, 0, sizeof(struct __res_state));
n = res_ninit(&res);
#define RESVAR res
#else
n = my_res_init();
#define RESVAR _res
#endif
params = jdns_dnsparams_new();
// error initializing?
if(n == -1)
return params;
// nameservers - ipv6
for(n = 0; n < MAXNS && n < RESVAR._u._ext.nscount; ++n)
{
jdns_address_t *addr;
struct sockaddr_in6 *sa6;
#ifdef USE_EXTEXT
sa6 = ((struct sockaddr_in6 *)RESVAR._u._ext.ext) + n;
#else
sa6 = RESVAR._u._ext.nsaddrs[n];
#endif
if(sa6 == NULL)
continue;
addr = jdns_address_new();
jdns_address_set_ipv6(addr, sa6->sin6_addr.s6_addr);
jdns_dnsparams_append_nameserver(params, addr, JDNS_UNICAST_PORT);
jdns_address_delete(addr);
}
// nameservers - ipv4
for(n = 0; n < MAXNS && n < RESVAR.nscount; ++n)
{
jdns_address_t *addr = jdns_address_new();
jdns_address_set_ipv4(addr, ntohl(RESVAR.nsaddr_list[n].sin_addr.s_addr));
jdns_dnsparams_append_nameserver(params, addr, JDNS_UNICAST_PORT);
jdns_address_delete(addr);
}
// domain name
if(strlen(RESVAR.defdname) > 0)
{
jdns_string_t *str;
jdns_string_t *p;
str = jdns_string_new();
jdns_string_set_cstr(str, RESVAR.defdname);
p = string_tolower(str);
jdns_string_delete(str);
str = p;
jdns_dnsparams_append_domain(params, str);
jdns_string_delete(str);
}
// search list
#ifdef MAXDFLSRCH
for(n = 0; n < MAXDFLSRCH && RESVAR.dnsrch[n]; ++n)
{
if(strlen(RESVAR.dnsrch[n]) > 0)
{
jdns_string_t *str;
jdns_string_t *p;
str = jdns_string_new();
jdns_string_set_cstr(str, RESVAR.dnsrch[n]);
p = string_tolower(str);
jdns_string_delete(str);
str = p;
// don't add dups
if(!dnsparams_have_domain(params, str))
jdns_dnsparams_append_domain(params, str);
jdns_string_delete(str);
}
}
#endif
return params;
}