5.4. Remote hostname lookup
To find the address associated with a hostname, the OP sends a
- RELAY_RESOLVE cell containing the hostname to be resolved. The OR
- replies with a RELAY_RESOLVED cell containing a status byte, and any
- number of answers. Each answer is of the form:
+ RELAY_RESOLVE cell containing the hostname to be resolved. (For a reverse
+ lookup, the OP sends a RELAY_RESOLVE cell containing an in-addr.arpa
+ address.) The OR replies with a RELAY_RESOLVED cell containing a status
+ byte, and any number of answers. Each answer is of the form:
Type (1 octet)
Length (1 octet)
Value (variable-width)
"Length" is the length of the Value field.
"Type" is one of:
+ 0x00 -- Hostname
0x04 -- IPv4 address
0x06 -- IPv6 address
0xF0 -- Error, transient