[tor-bugs] #33220 [Core Tor/Tor]: Prop 311: 3. Allow Relay IPv6 Extends

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#33220: Prop 311: 3. Allow Relay IPv6 Extends
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 Reporter:  teor           |          Owner:  teor
     Type:  enhancement    |         Status:  assigned
 Priority:  Medium         |      Milestone:  Tor: 0.4.4.x-final
Component:  Core Tor/Tor   |        Version:
 Severity:  Normal         |     Resolution:
 Keywords:  ipv6, prop311  |  Actual Points:
Parent ID:  #33048         |         Points:  3
 Reviewer:                 |        Sponsor:  Sponsor55-must
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Comment (by teor):

 To make these changes, we will need to modify:
 * Most functions in circuitbuild_relay.c (a new file introduced by #33633)
 * check_extend_cell() in onion.c

 We should also modify the legacy EXTEND cell code:
 * extend_cell_from_extend2_cell_body() in onion.c
 Even though all relays that support IPv6 extends should be using extend2
 cells.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33220#comment:1>
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