Damien Neil | a6a24dd | 2024-02-15 09:52:29 -0800 | [diff] [blame] | 1 | // Copyright 2023 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | //go:build go1.21 |
| 6 | |
| 7 | package quic |
| 8 | |
| 9 | import "net/netip" |
| 10 | |
| 11 | // Per-plaform consts describing support for various features. |
| 12 | // |
| 13 | // const udpECNSupport indicates whether the platform supports setting |
| 14 | // the ECN (Explicit Congestion Notification) IP header bits. |
| 15 | // |
| 16 | // const udpInvalidLocalAddrIsError indicates whether sending a packet |
| 17 | // from an local address not associated with the system is an error. |
| 18 | // For example, assuming 127.0.0.2 is not a local address, does sending |
| 19 | // from it (using IP_PKTINFO or some other such feature) result in an error? |
| 20 | |
| 21 | // unmapAddrPort returns a with any IPv4-mapped IPv6 address prefix removed. |
| 22 | func unmapAddrPort(a netip.AddrPort) netip.AddrPort { |
| 23 | if a.Addr().Is4In6() { |
| 24 | return netip.AddrPortFrom( |
| 25 | a.Addr().Unmap(), |
| 26 | a.Port(), |
| 27 | ) |
| 28 | } |
| 29 | return a |
| 30 | } |