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Diffstat (limited to 'spec/tor-spec/opening-streams.md')
| -rw-r--r-- | spec/tor-spec/opening-streams.md | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/spec/tor-spec/opening-streams.md b/spec/tor-spec/opening-streams.md index 757f776..799b4dc 100644 --- a/spec/tor-spec/opening-streams.md +++ b/spec/tor-spec/opening-streams.md @@ -68,6 +68,18 @@ payload is in one of the following formats: A number of seconds (TTL) for which the address may be cached [4 octets] ``` +Implementations MUST accept either of these formats, +and MUST also accept an empty RELAY_CONNECTED message body. + +Implmentations MAY ignore the address value, +and MAY choose not to cache it. +If an implementation chooses to cache the address, +it SHOULD NOT reuse that address with any other circuit. + +> The reason not to cache an address +> is that the exit might have lied about the actual address of the host, +> or might have given us a unique address to identify us in the future. + \[Tor exit nodes before 0.1.2.0 set the TTL field to a fixed value. Later versions set the TTL to the last value seen from a DNS server, and expire their own cached entries after a fixed interval. This prevents certain |