I am trying to find the IP of a windows computer (named TEST) on a local wifi network on iOS for smb purposes. I have bonjour installed on this windows machine and if i type the following command in terminal on my mac(on the same wifi network):
ping TEST.local
I get a success ( '64 bytes from 10.0.1.19: icmp_seq=285 ttl=128 time=3.237 ms' ). Note the ip (10.0.1.19): It resolves the hostname correctly! No problem so far!
Now, I'm trying to do the same on iOS by using CFHostCreateWithName:
NSString *host = @"TEST.local";
CFHostRef hostref = CFHostCreateWithName(nil/*or kCFAllocatorDefault, same result...*/,(__bridge CFStringRef)host);
CFStreamError *err;
Boolean lookup = CFHostStartInfoResolution(hostref, kCFHostAddresses, err);
NSArray* addresses = (__bridge NSArray*)CFHostGetAddressing(hostref, &lookup);
id first = addresses.firstObject;
if(first!=nil) {
struct in_addr *firstaddress = (__bridge struct in_addr *)first;
NSString *strDNS = [NSString stringWithUTF8String:inet_ntoa(*(firstaddress))];
}
Results vary from:
So host resolving is fine on mac, but does not work on an iOS device connected to the same network... Did i miss something?
Basically, you can get the hostname using this:
NSString* hostname = @"Mac-mini.local";
CFHostRef hostRef = CFHostCreateWithName(kCFAllocatorDefault, (__bridge CFStringRef)hostname);
Boolean lookup = CFHostStartInfoResolution(hostRef, kCFHostAddresses, NULL);
if (lookup) {
CFArrayRef addresses = CFHostGetAddressing(hostRef, &lookup);
struct sockaddr_in *remoteAddr;
for(int i = 0; i < CFArrayGetCount(addresses); i++) {
CFDataRef saData = (CFDataRef)CFArrayGetValueAtIndex(addresses, i);
remoteAddr = (struct sockaddr_in*)CFDataGetBytePtr(saData);
if(remoteAddr != NULL){
NSString *strDNS = [NSString stringWithUTF8String:inet_ntoa(remoteAddr->sin_addr)];
NSLog(@"dns:%@",strDNS);
}
}
CFRelease(addresses);
}
In your case you would have to modify it this way:
NSString *host = @"TEST.local";
CFHostRef hostref = CFHostCreateWithName(kCFAllocatorDefault,(__bridge CFStringRef)host);
CFStreamError *err;
Boolean lookup = CFHostStartInfoResolution(hostref, kCFHostAddresses, err);
NSArray* addresses = (__bridge NSArray*)CFHostGetAddressing(hostref, &lookup);
if(addresses.firstObject!=nil) {
struct sockaddr_in *firstaddress = (struct sockaddr_in*)CFDataGetBytePtr((__bridge CFDataRef)addresses.firstObject);
NSString *strDNS = [NSString stringWithUTF8String:inet_ntoa(firstaddress->sin_addr)];
}