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Use STUN to get the WAN address for PCs discovered by mDNS

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This commit is contained in:
Cameron Gutman
2018-10-26 20:28:59 -07:00
parent 736887b945
commit 8e6dadfa79
5 changed files with 49 additions and 21 deletions
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Limelight/Network/MDNSManager.m
+23 -5
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@@ -9,6 +9,10 @@
#import "MDNSManager.h"
#import "TemporaryHost.h"
#include <arpa/inet.h>
#include <Limelight.h>
@implementation MDNSManager {
NSNetServiceBrowser* mDNSBrowser;
NSMutableArray* services;
@@ -60,11 +64,25 @@ static NSString* NV_SERVICE_TYPE = @"_nvstream._tcp";
}
- (void)netServiceDidResolveAddress:(NSNetService *)service {
Log(LOG_D, @"Resolved address: %@ -> %@", service, service.hostName);
TemporaryHost* host = [[TemporaryHost alloc] init];
host.activeAddress = host.localAddress = service.hostName;
host.name = service.hostName;
[self.callback updateHost:host];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
Log(LOG_D, @"Resolved address: %@ -> %@", service, service.hostName);
TemporaryHost* host = [[TemporaryHost alloc] init];
// Since we discovered this host over mDNS, we know we're on the same network
// as the PC and we can use our current WAN address as a likely candidate
// for our PC's external address.
struct in_addr wanAddr;
int err = LiFindExternalAddressIP4("stun.stunprotocol.org", 3478, &wanAddr.s_addr);
if (err == 0) {
char addrStr[INET_ADDRSTRLEN];
inet_ntop(AF_INET, &wanAddr, addrStr, sizeof(addrStr));
host.externalAddress = [NSString stringWithFormat: @"%s", addrStr];
}
host.activeAddress = host.localAddress = service.hostName;
host.name = service.hostName;
[self.callback updateHost:host];
});
}
- (void)netService:(NSNetService *)sender didNotResolve:(NSDictionary *)errorDict {