forked from quic-go/quic-go
fd2c345152
This commit introduces additional platform-dependent checking when the kernel returns an error. Previously, the session is terminated when PingFrame sends a discovery packet larger than the limit. With this commit, the error is checked, and if it is "datagram too large", the error is ignored. Additionally, 1. This commit re-enables MTU discovery on Windows unless it is disabled explicitly by user (Undo #3276), 2. Set IP_DONTFRAGMENT and IPV6_DONTFRAG with error checking on Windows, and 3. Set IP_MTU_DISCOVERY to PMTUDISC_DO for both IPv4 and IPv6 on Linux so that the kernel will return "message too long". Fixes #3273 #3327
16 lines
437 B
Go
16 lines
437 B
Go
//go:build linux
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// +build linux
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package quic
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import (
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"golang.org/x/sys/unix"
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)
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func setOOBSockOpts(fd uintptr) {
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// Enabling IP_MTU_DISCOVER will force the kernel to return "sendto: message too long"
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// and the datagram will not be fragmented
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unix.SetsockoptInt(int(fd), unix.IPPROTO_IP, unix.IP_MTU_DISCOVER, unix.IP_PMTUDISC_DO)
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unix.SetsockoptInt(int(fd), unix.IPPROTO_IPV6, unix.IPV6_MTU_DISCOVER, unix.IPV6_PMTUDISC_DO)
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}
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