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Make port mapper names even more unique, and trial bind before binding TCP now which should work on Linux and others.

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This commit is contained in:
Adam Ierymenko 2016-04-07 09:51:14 -07:00
parent 9085a04b16
commit 569de22481
1 changed files with 43 additions and 37 deletions
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80
service/OneService.cpp
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@ -571,33 +571,37 @@ public:
if (port == 0) {
unsigned int randp = 0;
Utils::getSecureRandom(&randp,sizeof(randp));
port = 40000 + (randp % 25500);
port = 20000 + (randp % 45500);
}
struct sockaddr_in in4;
memset(&in4,0,sizeof(in4));
in4.sin_family = AF_INET;
in4.sin_addr.s_addr = Utils::hton((uint32_t)0x7f000001); // right now we just listen for TCP @127.0.0.1
in4.sin_port = Utils::hton((uint16_t)port);
_v4TcpControlSocket = _phy.tcpListen((const struct sockaddr *)&in4,this);
if (_trialBind(port)) {
struct sockaddr_in in4;
memset(&in4,0,sizeof(in4));
in4.sin_family = AF_INET;
in4.sin_addr.s_addr = Utils::hton((uint32_t)0x7f000001); // right now we just listen for TCP @127.0.0.1
in4.sin_port = Utils::hton((uint16_t)port);
_v4TcpControlSocket = _phy.tcpListen((const struct sockaddr *)&in4,this);
struct sockaddr_in6 in6;
memset((void *)&in6,0,sizeof(in6));
in6.sin6_family = AF_INET6;
in6.sin6_port = in4.sin_port;
in6.sin6_addr.s6_addr[15] = 1; // IPv6 localhost == ::1
_v6TcpControlSocket = _phy.tcpListen((const struct sockaddr *)&in6,this);
struct sockaddr_in6 in6;
memset((void *)&in6,0,sizeof(in6));
in6.sin6_family = AF_INET6;
in6.sin6_port = in4.sin_port;
in6.sin6_addr.s6_addr[15] = 1; // IPv6 localhost == ::1
_v6TcpControlSocket = _phy.tcpListen((const struct sockaddr *)&in6,this);
// We must bind one of IPv4 or IPv6 -- support either failing to support hosts that
// have only IPv4 or only IPv6 stacks.
if ((_v4TcpControlSocket)||(_v6TcpControlSocket)) {
_ports[0] = port;
break;
// We must bind one of IPv4 or IPv6 -- support either failing to support hosts that
// have only IPv4 or only IPv6 stacks.
if ((_v4TcpControlSocket)||(_v6TcpControlSocket)) {
_ports[0] = port;
break;
} else {
if (_v4TcpControlSocket)
_phy.close(_v4TcpControlSocket,false);
if (_v6TcpControlSocket)
_phy.close(_v6TcpControlSocket,false);
port = 0;
}
} else {
if (_v4TcpControlSocket)
_phy.close(_v4TcpControlSocket,false);
if (_v6TcpControlSocket)
_phy.close(_v6TcpControlSocket,false);
port = 0;
}
}
@ -675,7 +679,7 @@ public:
// private address port number.
_ports[1] = 20000 + ((unsigned int)_node->address() % 45500);
for(int i=0;;++i) {
if (i > 256) {
if (i > 1000) {
_ports[1] = 0;
break;
} else if (++_ports[1] >= 65536) {
@ -689,21 +693,23 @@ public:
// If we're running uPnP/NAT-PMP, bind a *third* port for that. We can't
// use the other two ports for that because some NATs do really funky
// stuff with ports that are explicitly mapped that breaks things.
_ports[2] = _ports[1];
for(int i=0;;++i) {
if (i > 256) {
_ports[2] = 0;
break;
} else if (++_ports[2] >= 65536) {
_ports[2] = 20000;
if (_ports[1]) {
_ports[2] = _ports[1];
for(int i=0;;++i) {
if (i > 1000) {
_ports[2] = 0;
break;
} else if (++_ports[2] >= 65536) {
_ports[2] = 20000;
}
if (_trialBind(_ports[2]))
break;
}
if (_ports[2]) {
char uniqueName[64];
Utils::snprintf(uniqueName,sizeof(uniqueName),"ZeroTier/%.10llx@%u",_node->address(),_ports[2]);
_portMapper = new PortMapper(_ports[2],uniqueName);
}
if (_trialBind(_ports[2]))
break;
}
if (_ports[2]) {
char uniqueName[64];
Utils::snprintf(uniqueName,sizeof(uniqueName),"ZeroTier/%.10llx",_node->address());
_portMapper = new PortMapper(_ports[2],uniqueName);
}
#endif