This page lists the protocols that may be implemented in the given Pia versions.

• 3.3 - 3.10
• 4.5
• 4.8 - 4.10
• 5.2
• 5.3 - 5.4
• 5.6 - 5.9
• 5.10
• 5.11
• 5.12
• 5.14
• 5.17 - 5.18
• 5.19
• 5.20 - 5.21
• 5.23
• 5.24 - 5.25
• 5.26 - 5.28
• 5.29 - 5.44
• 6.16 - 6.30

This is the earliest Pia version that we are aware of.

ID	Protocol
0x0080	Relay Protocol
0x00C0	Keep Alive Protocol
0x0100	Station Protocol
0x0200	Session Protocol
0x0210	Session Clock Protocol
0x0400	NAT Protocol
0x0410	Gateway Protocol
0x0600	RTT Protocol
0x1800	Sync Protocol (old)
0x1810	Sync Protocol
0x2000	Unreliable Protocol
0x2100	Roundrobin Unreliable Protocol
0x2400	Clone Protocol
0x2800	Voice Protocol
0x3000	Reliable Protocol
0x7000	Reliable Broadcast Protocol
0x7200	Match Protocol
0x8000	Feedback Protocol
0x8200	Relay Service Protocol

A few protocols were renamed.

ID	Protocol
0x0080	Relay Protocol
0x00C0	Keep Alive Protocol
0x0100	Station Protocol
0x0200	Mesh Protocol
0x0210	Sync Clock Protocol
0x0400	NAT Protocol
0x0410	Gateway Protocol
0x0600	RTT Protocol
0x1800	Sync Protocol (old)
0x1810	Sync Protocol
0x2000	Unreliable Protocol
0x2100	Roundrobin Unreliable Protocol
0x2400	Clone Protocol
0x2800	Voice Protocol
0x3000	Reliable Protocol
0x7000	Reliable Broadcast Protocol
0x7200	Session Protocol
0x8000	Feedback Protocol
0x8200	Relay Service Protocol

The bandwidth check protocol was added.

ID	Protocol
0x0080	Relay Protocol
0x00C0	Keep Alive Protocol
0x0100	Station Protocol
0x0200	Mesh Protocol
0x0210	Sync Clock Protocol
0x0400	NAT Protocol
0x0410	Gateway Protocol
0x0500	Bandwidth Check Protocol
0x0600	RTT Protocol
0x1800	Sync Protocol (old)
0x1810	Sync Protocol
0x2000	Unreliable Protocol
0x2100	Roundrobin Unreliable Protocol
0x2400	Clone Protocol
0x2800	Voice Protocol
0x3000	Reliable Protocol
0x7000	Reliable Broadcast Protocol
0x7200	Session Protocol
0x8000	Feedback Protocol
0x8200	Relay Service Protocol

This is the first version in which the local and LAN protocol were seen.

ID	Protocol
0x0080	Relay Protocol
0x00C0	Keep Alive Protocol
0x0100	Station Protocol
0x0200	Mesh Protocol
0x0210	Sync Clock Protocol
0x0300	Local Protocol
0x0400	NAT Protocol
0x0410	Gateway Protocol
0x0420	LAN Protocol
0x0500	Bandwidth Check Protocol
0x0600	RTT Protocol
0x1810	Sync Protocol
0x2000	Unreliable Protocol
0x2400	Clone Protocol
0x2800	Voice Protocol
0x3000	Reliable Protocol
0x7000	Reliable Broadcast Protocol
0x7200	Session Protocol
0x8000	Feedback Protocol

The direct and net protocol were introduced.

ID	Protocol
0x0080	Relay Protocol
0x00C0	Keep Alive Protocol
0x0100	Station Protocol
0x0200	Mesh Protocol
0x0210	Sync Clock Protocol
0x0300	Local Protocol
0x0310	Direct Protocol
0x0320	Net Protocol
0x0400	NAT Protocol
0x0410	Gateway Protocol
0x0420	LAN Protocol
0x0500	Bandwidth Check Protocol
0x0600	RTT Protocol
0x1810	Sync Protocol
0x2000	Unreliable Protocol
0x2400	Clone Protocol
0x2800	Voice Protocol
0x3000	Reliable Protocol
0x7000	Reliable Broadcast Protocol
0x7200	Session Protocol
0x8000	Feedback Protocol

The protocol list was cleaned up and new ids were assigned.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x64	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x74	Clone Protocol
0x78	Voice Protocol
0x7C	Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol

The lobby protocols were introduced.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x64	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x6D	Lobby Unreliable Protocol
0x74	Clone Protocol
0x78	Voice Protocol
0x7C	Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol

The clone and sync protocol were split up into smaller protocols. The unreliable lobby protocol was removed.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x64	Sync Protocol
0x65	Sync Protocol (event)
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x78	Voice Protocol
0x7C	Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol

The WAN NAT protocol was added.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x64	Sync Protocol
0x65	Sync Protocol (event)
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x78	Voice Protocol
0x7C	Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol

The broadcast reliable protocol was added, which is meant to replace the reliable broadcast protocol.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x64	Sync Protocol
0x65	Sync Protocol (event)
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x78	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol

The old sync protocol was removed. The stream broadcast reliable protocol was added.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x78	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol

The voice protocol was assigned a different protocol id.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x84	Reliable Broadcast Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol

The reliable broadcast protocol was removed.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x54	Bandwidth Check Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol

The bandwidth check protocol was removed.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Feedback Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol

The reckoning protocols were added. The feedback protocol was renamed to monitoring data protocol.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x28	Direct Protocol
0x2C	Net Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x6C	Roundrobin Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x94	Session Protocol
0x98	Lobby Protocol
0xA4	Monitoring Data Protocol
0xA8	Relay Service Protocol
0xAC	WAN NAT Protocol
0xB0	Reckoning 1D Protocol
0xB4	Reckoning 3D Protocol

Several protocols were removed.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x94	Session Protocol
0xA4	Monitoring Data Protocol
0xB0	Reckoning 1D Protocol
0xB4	Reckoning 3D Protocol

The broadcast event protocol was added to the clone protocol.

ID	Protocol
0x08	Keep Alive Protocol
0x14	Station Protocol
0x18	Mesh Protocol
0x1C	Sync Clock Protocol
0x24	Local Protocol
0x34	NAT Protocol
0x44	LAN Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x73	Clone Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x76	Clone Protocol (broadcast event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x94	Session Protocol
0xA4	Monitoring Data Protocol
0xB0	Reckoning 1D Protocol
0xB4	Reckoning 3D Protocol

The Pia library was redesigned for NPLN.

ID	Protocol
0x08	Keep Alive Protocol
0x2C	Net Protocol
0x30	Turn Protocol
0x58	RTT Protocol
0x65	Sync Protocol
0x68	Unreliable Protocol
0x74	Clone Protocol (atomic)
0x75	Clone Protocol (event)
0x76	Clone Protocol (broadcast event)
0x77	Clone Protocol (clock)
0x7B	Voice Protocol
0x7C	Reliable Protocol
0x80	Broadcast Reliable Protocol
0x81	Stream Broadcast Reliable Protocol
0x94	Session Protocol
0xA0	NAT Traversal Result Protocol
0xA4	Monitoring Data Protocol
0xAC	WAN NAT Protocol
0xB0	Reckoning 1D Protocol
0xB4	Reckoning 3D Protocol