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| // | |
| // ViewController.m | |
| // LIFX | |
| // | |
| // Created by Gary Riches on 18/01/2016. | |
| // Copyright © 2016 Gary Riches. All rights reserved. | |
| // | |
| #import "ViewController.h" | |
| #import "GCDAsyncUdpSocket.h" | |
| typedef struct { | |
| /* frame */ | |
| uint16_t size; | |
| uint16_t protocol:12; | |
| uint8_t addressable:1; | |
| uint8_t tagged:1; | |
| uint8_t origin:2; | |
| uint32_t source; | |
| /* frame address */ | |
| uint8_t target[8]; | |
| uint8_t reserved[6]; | |
| uint8_t res_required:1; | |
| uint8_t ack_required:1; | |
| uint8_t :6; | |
| uint8_t sequence; | |
| /* protocol header */ | |
| uint64_t :64; | |
| uint16_t type; | |
| uint16_t reserved_header:16; | |
| /* variable length payload follows */ | |
| } packet; | |
| packet CreatePacket(){ | |
| packet Packet; | |
| return Packet; | |
| } | |
| @interface ViewController () <GCDAsyncUdpSocketDelegate> | |
| @property (nonatomic, strong) GCDAsyncUdpSocket *udpSocket; | |
| @end | |
| @implementation ViewController | |
| - (void)viewDidLoad { | |
| [super viewDidLoad]; | |
| // Do any additional setup after loading the view, typically from a nib. | |
| self.udpSocket = [[GCDAsyncUdpSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()]; | |
| self.udpSocket.delegate = self; | |
| // Discover | |
| [self discover]; | |
| } | |
| - (void)udpSocket:(GCDAsyncUdpSocket *)sock didReceiveData:(NSData *)data fromAddress:(NSData *)address withFilterContext:(id)filterContext { | |
| NSString *response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; | |
| NSLog(@"%@", response); | |
| } | |
| - (void)discover { | |
| [self.udpSocket enableBroadcast:YES error:nil]; | |
| self.udpSocket.delegate = self; | |
| [self.udpSocket bindToPort:56700 error:nil]; | |
| [self.udpSocket beginReceiving:nil]; | |
| [self findBulbs]; | |
| [self performSelector:@selector(cancelFindBulbs) withObject:nil afterDelay:12]; | |
| } | |
| - (void)findBulbs | |
| { | |
| packet discovery = CreatePacket(); | |
| discovery.protocol = 1024; | |
| discovery.addressable = 1; | |
| discovery.tagged = 1; | |
| discovery.origin = 0; | |
| discovery.source = 0; | |
| bzero(discovery.target, sizeof(discovery.target)); | |
| bzero(discovery.reserved, sizeof(discovery.reserved)); | |
| discovery.res_required = 0; | |
| discovery.ack_required = 0; | |
| discovery.sequence = 0; | |
| discovery.reserved_header = 0; | |
| discovery.type = 2; | |
| discovery.size = sizeof(discovery); | |
| NSData *bytes = [NSData dataWithBytes:&discovery length:sizeof(discovery)]; | |
| [self.udpSocket sendData:bytes toHost:@"255.255.255.255" port:56700 withTimeout:-1 tag:1]; | |
| [self performSelector:@selector(findBulbs) withObject:nil afterDelay:1]; | |
| } | |
| - (void)cancelFindBulbs | |
| { | |
| [self.udpSocket pauseReceiving]; | |
| [self.udpSocket enableBroadcast:NO error:nil]; | |
| } | |
| @end |
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