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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/DiscoveryManager.m
+12 -14
View File
@@ -158,21 +158,19 @@
[_hostQueue removeObject:host];
}
// Override from MDNSCallback
// Override from MDNSCallback - called in a worker thread
- (void)updateHost:(TemporaryHost*)host {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Discover the hosts before adding to eliminate duplicates
Log(LOG_D, @"Found host through MDNS: %@:", host.name);
// Since this is on a background thread, we do not need to use the opQueue
DiscoveryWorker* worker = (DiscoveryWorker*)[self createWorkerForHost:host];
[worker discoverHost];
if ([self addHostToDiscovery:host]) {
Log(LOG_I, @"Found new host through MDNS: %@:", host.name);
[self->_callback updateAllHosts:self->_hostQueue];
} else {
Log(LOG_D, @"Found existing host through MDNS: %@", host.name);
}
});
// Discover the hosts before adding to eliminate duplicates
Log(LOG_D, @"Found host through MDNS: %@:", host.name);
// Since this is on a background thread, we do not need to use the opQueue
DiscoveryWorker* worker = (DiscoveryWorker*)[self createWorkerForHost:host];
[worker discoverHost];
if ([self addHostToDiscovery:host]) {
Log(LOG_I, @"Found new host through MDNS: %@:", host.name);
[self->_callback updateAllHosts:self->_hostQueue];
} else {
Log(LOG_D, @"Found existing host through MDNS: %@", host.name);
}
}
- (TemporaryHost*) getHostInDiscovery:(NSString*)uuidString {
Limelight/Network/MDNSManager.m
+23 -5
View File
@@ -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 {
Limelight/Network/ServerInfoResponse.m
+7 -1
View File
@@ -19,12 +19,18 @@
- (void) populateHost:(TemporaryHost*)host {
host.name = [[self getStringTag:TAG_HOSTNAME] trim];
host.externalAddress = [[self getStringTag:TAG_EXTERNAL_IP] trim];
host.localAddress = [[self getStringTag:TAG_LOCAL_IP] trim];
host.uuid = [[self getStringTag:TAG_UNIQUE_ID] trim];
host.mac = [[self getStringTag:TAG_MAC_ADDRESS] trim];
host.currentGame = [[self getStringTag:TAG_CURRENT_GAME] trim];
// Modern GFE versions don't actually give us a WAN address anymore
// so we leave the one that we populated from mDNS discovery via STUN.
NSString *wanAddr = [[self getStringTag:TAG_EXTERNAL_IP] trim];
if (wanAddr) {
host.externalAddress = wanAddr;
}
NSString *state = [[self getStringTag:TAG_STATE] trim];
if (![state hasSuffix:@"_SERVER_BUSY"]) {
// GFE 2.8 started keeping currentgame set to the last game played. As a result, it no longer