diff options
Diffstat (limited to 'node/Packet.hpp')
| -rw-r--r-- | node/Packet.hpp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/node/Packet.hpp b/node/Packet.hpp index 7439dddc..20a5b145 100644 --- a/node/Packet.hpp +++ b/node/Packet.hpp @@ -175,6 +175,12 @@ */ #define ZT_PROTO_BEACON_IDX_ADDRESS 8 +// Destination address types from HELLO and OK(HELLO) +#define ZT_PROTO_DEST_ADDRESS_TYPE_NONE 0 +#define ZT_PROTO_DEST_ADDRESS_TYPE_ETHERNET 1 +#define ZT_PROTO_DEST_ADDRESS_TYPE_IPV4 4 +#define ZT_PROTO_DEST_ADDRESS_TYPE_IPV6 6 + // Field incides for parsing verbs ------------------------------------------- // Some verbs have variable-length fields. Those aren't fully defined here @@ -467,6 +473,23 @@ public: * <[2] software revision> * <[8] timestamp (ms since epoch)> * <[...] binary serialized identity (see Identity)> + * <[1] destination address type> + * [<[...] destination address>] + * + * This is the only message that ever must be sent in the clear, since it + * is used to push an identity to a new peer. + * + * The destination address is the wire address to which this packet is + * being sent, and in OK is *also* the destination address of the OK + * packet. This can be used by the receiver to detect NAT, learn its real + * external address if behind NAT, and detect changes to its external + * address that require re-establishing connectivity. + * + * Destination address types and formats (not all of these are used now): + * 0 - None -- no destination address data present + * 1 - Ethernet address -- format: <[6] Ethernet MAC> + * 4 - 6-byte IPv4 address -- format: <[4] IP>, <[2] port> + * 6 - 18-byte IPv6 address -- format: <[16] IP>, <[2] port> * * OK payload: * <[8] timestamp (echoed from original HELLO)> @@ -474,6 +497,8 @@ public: * <[1] software major version (of responder)> * <[1] software minor version (of responder)> * <[2] software revision (of responder)> + * <[1] destination address type (for this OK, not copied from HELLO)> + * [<[...] destination address>] * * ERROR has no payload. */ |