static JSBool myIpAddress(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) {
char *hostname = JS_malloc(cx, 1024);
if (!gethostname(hostname, 1023)) {
JSString *myhost = JS_NewString(cx, hostname, strlen(hostname));
jsval arg = STRING_TO_JSVAL(myhost);
return dnsResolve(cx, obj, 1, &arg, rval);
}
px_free(hostname);
*rval = JSVAL_NULL;
return true;
}
error_t getHostByName(NetInterface *interface,
const char_t *name, IpAddr *ipAddr, uint_t flags)
{
error_t error;
//Default address type depends on TCP/IP stack configuration
#if (IPV4_SUPPORT == ENABLED)
HostType type = HOST_TYPE_IPV4;
#elif (IPV6_SUPPORT == ENABLED)
HostType type = HOST_TYPE_IPV6;
#else
HostType type = HOST_TYPE_ANY;
#endif
//Default name resolution protocol depends on TCP/IP stack configuration
#if (DNS_CLIENT_SUPPORT == ENABLED)
HostnameResolver protocol = HOST_NAME_RESOLVER_DNS;
#elif (MDNS_CLIENT_SUPPORT == ENABLED)
HostnameResolver protocol = HOST_NAME_RESOLVER_MDNS;
#elif (NBNS_CLIENT_SUPPORT == ENABLED)
HostnameResolver protocol = HOST_NAME_RESOLVER_NBNS;
#else
HostnameResolver protocol = HOST_NAME_RESOLVER_ANY;
#endif
//Check parameters
if(name == NULL || ipAddr == NULL)
return ERROR_INVALID_PARAMETER;
//Use default network interface?
if(interface == NULL)
interface = netGetDefaultInterface();
//The specified name can be either an IP or a host name
error = ipStringToAddr(name, ipAddr);
//Perform name resolution if necessary
if(error)
{
//The user may provide a hint to choose between IPv4 and IPv6
if(flags & HOST_TYPE_IPV4)
type = HOST_TYPE_IPV4;
else if(flags & HOST_TYPE_IPV6)
type = HOST_TYPE_IPV6;
//The user may provide a hint to to select the desired protocol to be used
if(flags & HOST_NAME_RESOLVER_DNS)
{
//Use DNS to resolve the specified host name
protocol = HOST_NAME_RESOLVER_DNS;
}
else if(flags & HOST_NAME_RESOLVER_MDNS)
{
//Use mDNS to resolve the specified host name
protocol = HOST_NAME_RESOLVER_MDNS;
}
else if(flags & HOST_NAME_RESOLVER_NBNS)
{
//Use NBNS to resolve the specified host name
protocol = HOST_NAME_RESOLVER_NBNS;
}
else
{
//Retrieve the length of the host name to be resolved
size_t n = strlen(name);
//Select the most suitable protocol
if(n >= 6 && !strcasecmp(name + n - 6, ".local"))
{
#if (MDNS_CLIENT_SUPPORT == ENABLED)
//Use mDNS to resolve the specified host name
protocol = HOST_NAME_RESOLVER_MDNS;
#endif
}
else if(n <= 15 && !strchr(name, '.') && type == HOST_TYPE_IPV4)
{
#if (NBNS_CLIENT_SUPPORT == ENABLED)
//Use NetBIOS Name Service to resolve the specified host name
protocol = HOST_NAME_RESOLVER_NBNS;
#endif
}
}
#if (DNS_CLIENT_SUPPORT == ENABLED)
//Use DNS protocol?
if(protocol == HOST_NAME_RESOLVER_DNS)
{
//Perform host name resolution
error = dnsResolve(interface, name, type, ipAddr);
}
else
#endif
#if (MDNS_CLIENT_SUPPORT == ENABLED)
//Use mDNS protocol?
if(protocol == HOST_NAME_RESOLVER_MDNS)
{
//Perform host name resolution
error = mdnsResolve(interface, name, type, ipAddr);
}
else
#endif
#if (NBNS_CLIENT_SUPPORT == ENABLED && IPV4_SUPPORT == ENABLED)
//Use NetBIOS Name Service protocol?
if(protocol == HOST_NAME_RESOLVER_NBNS)
{
//Perform host name resolution
error = nbnsResolve(interface, name, ipAddr);
}
else
#endif
//Invalid protocol?
{
//Report an error
error = ERROR_INVALID_PARAMETER;
}
}
//Return status code
return error;
}
