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Add support for zero configuration IPv6 streaming

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This commit is contained in:
Cameron Gutman
2019-07-14 19:17:17 -07:00
parent cb527baead
commit 8337b3e708
10 changed files with 193 additions and 8 deletions
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3
Limelight/Network/DiscoveryManager.m
View File

@@ -130,6 +130,9 @@
if (host.localAddress != nil) {
existingHost.localAddress = host.localAddress;
}
if (host.ipv6Address != nil) {
existingHost.ipv6Address = host.ipv6Address;
}
if (host.externalAddress != nil) {
existingHost.externalAddress = host.externalAddress;
}

5
Limelight/Network/DiscoveryWorker.m
View File

@@ -52,6 +52,9 @@ static const float POLL_RATE = 2.0f; // Poll every 2 seconds
if (_host.externalAddress != nil) {
[array addObject:_host.externalAddress];
}
if (_host.ipv6Address != nil) {
[array addObject:_host.ipv6Address];
}
// Remove duplicate addresses from the list.
// This is done using an array rather than a set
@@ -117,7 +120,7 @@ static const float POLL_RATE = 2.0f; // Poll every 2 seconds
_host.online = receivedResponse;
if (receivedResponse) {
Log(LOG_D, @"Received response from: %@\n{\n\t address:%@ \n\t localAddress:%@ \n\t externalAddress:%@ \n\t uuid:%@ \n\t mac:%@ \n\t pairState:%d \n\t online:%d \n\t activeAddress:%@ \n}", _host.name, _host.address, _host.localAddress, _host.externalAddress, _host.uuid, _host.mac, _host.pairState, _host.online, _host.activeAddress);
Log(LOG_D, @"Received response from: %@\n{\n\t address:%@ \n\t localAddress:%@ \n\t externalAddress:%@ \n\t ipv6Address:%@ \n\t uuid:%@ \n\t mac:%@ \n\t pairState:%d \n\t online:%d \n\t activeAddress:%@ \n}", _host.name, _host.address, _host.localAddress, _host.externalAddress, _host.ipv6Address, _host.uuid, _host.mac, _host.pairState, _host.online, _host.activeAddress);
}
}

130
Limelight/Network/MDNSManager.m
View File

@@ -63,11 +63,137 @@ static NSString* NV_SERVICE_TYPE = @"_nvstream._tcp";
[mDNSBrowser stop];
}
+ (NSString*)sockAddrToString:(NSData*)addrData {
char addrStr[INET6_ADDRSTRLEN];
struct sockaddr* addr = (struct sockaddr*)[addrData bytes];
if (addr->sa_family == AF_INET) {
inet_ntop(addr->sa_family, &((struct sockaddr_in*)addr)->sin_addr, addrStr, sizeof(addrStr));
}
else {
inet_ntop(addr->sa_family, &((struct sockaddr_in6*)addr)->sin6_addr, addrStr, sizeof(addrStr));
}
return [NSString stringWithFormat: @"%s", addrStr];
}
+ (BOOL)isAddress:(uint8_t*)address inSubnet:(uint8_t*)subnet netmask:(int)bits {
for (int i = 0; i < bits; i++) {
uint8_t mask = 1 << (i % 8);
if ((address[i / 8] & mask) != (subnet[i / 8] & mask)) {
return NO;
}
}
return YES;
}
+ (BOOL)isLocalIpv6Address:(NSData*)addrData {
struct sockaddr_in6* sin6 = (struct sockaddr_in6*)[addrData bytes];
if (sin6->sin6_family != AF_INET6) {
return NO;
}
uint8_t* addrBytes = sin6->sin6_addr.s6_addr;
uint8_t prefix[2];
// fe80::/10
prefix[0] = 0xfe;
prefix[1] = 0x80;
if ([MDNSManager isAddress:addrBytes inSubnet:prefix netmask:10]) {
// Link-local
return YES;
}
// fec0::/10
prefix[0] = 0xfe;
prefix[1] = 0xc0;
if ([MDNSManager isAddress:addrBytes inSubnet:prefix netmask:10]) {
// Site local
return YES;
}
// fc00::/7
prefix[0] = 0xfc;
prefix[1] = 0x00;
if ([MDNSManager isAddress:addrBytes inSubnet:prefix netmask:7]) {
// ULA
return YES;
}
return NO;
}
+ (NSString*)getBestIpv6Address:(NSArray<NSData*>*)addresses {
for (NSData* addrData in addresses) {
struct sockaddr_in6* sin6 = (struct sockaddr_in6*)[addrData bytes];
if (sin6->sin6_family != AF_INET6) {
continue;
}
if ([MDNSManager isLocalIpv6Address:addrData]) {
// Skip non-global addresses
continue;
}
uint8_t* addrBytes = sin6->sin6_addr.s6_addr;
uint8_t prefix[2];
// 2002::/16
prefix[0] = 0x20;
prefix[1] = 0x02;
if ([MDNSManager isAddress:addrBytes inSubnet:prefix netmask:16]) {
Log(LOG_I, @"Ignoring 6to4 address: %@", [MDNSManager sockAddrToString:addrData]);
continue;
}
// 2001::/32
prefix[0] = 0x20;
prefix[1] = 0x01;
if ([MDNSManager isAddress:addrBytes inSubnet:prefix netmask:32]) {
Log(LOG_I, @"Ignoring Teredo address: %@", [MDNSManager sockAddrToString:addrData]);
continue;
}
return [MDNSManager sockAddrToString:addrData];
}
return nil;
}
- (void)netServiceDidResolveAddress:(NSNetService *)service {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
Log(LOG_D, @"Resolved address: %@ -> %@", service, service.hostName);
NSArray<NSData*>* addresses = [service addresses];
for (NSData* addrData in addresses) {
Log(LOG_I, @"Resolved address: %@ -> %@", [service hostName], [MDNSManager sockAddrToString: addrData]);
}
TemporaryHost* host = [[TemporaryHost alloc] init];
// First, look for an IPv4 record for the local address
for (NSData* addrData in addresses) {
struct sockaddr_in* sin = (struct sockaddr_in*)[addrData bytes];
if (sin->sin_family != AF_INET) {
continue;
}
host.localAddress = [MDNSManager sockAddrToString:addrData];
Log(LOG_I, @"Local address chosen: %@ -> %@", [service hostName], host.localAddress);
break;
}
if (host.localAddress == nil) {
// If we didn't find an IPv4 record, look for a local IPv6 record
for (NSData* addrData in addresses) {
if ([MDNSManager isLocalIpv6Address:addrData]) {
host.localAddress = [MDNSManager sockAddrToString:addrData];
Log(LOG_I, @"Local address chosen: %@ -> %@", [service hostName], host.localAddress);
break;
}
}
}
host.ipv6Address = [MDNSManager getBestIpv6Address:addresses];
Log(LOG_I, @"IPv6 address chosen: %@ -> %@", [service hostName], host.ipv6Address);
// 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.
@@ -82,7 +208,7 @@ static NSString* NV_SERVICE_TYPE = @"_nvstream._tcp";
Log(LOG_E, @"STUN failed to get WAN address: %d", err);
}
host.activeAddress = host.localAddress = service.hostName;
host.activeAddress = host.localAddress;
host.name = service.hostName;
[self.callback updateHost:host];
});

6
Limelight/Network/WakeOnLanManager.m
View File

@@ -33,7 +33,7 @@ static const int ports[numPorts] = {7, 9, 47998, 47999, 48000};
+ (void) wakeHost:(TemporaryHost*)host {
NSData* wolPayload = [WakeOnLanManager createPayload:host];
for (int i = 0; i < 4; i++) {
for (int i = 0; i < 5; i++) {
const char* address;
struct addrinfo hints, *res, *curr;
@@ -44,7 +44,9 @@ static const int ports[numPorts] = {7, 9, 47998, 47999, 48000};
address = [host.externalAddress UTF8String];
} else if (i == 2 && host.address != nil) {
address = [host.address UTF8String];
} else if (i == 3) {
} else if (i == 3 && host.ipv6Address != nil) {
address = [host.ipv6Address UTF8String];
} else if (i == 4) {
address = "255.255.255.255";
} else {
// Requested address wasn't present