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TUN-6741: ICMP proxy tries to listen on specific IPv4 & IPv6 when possible

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If it cannot determine the correct interface IP, it will fallback to all interfaces.
This commit also introduces the icmpv4-src and icmpv6-src flags
This commit is contained in:
cthuang
2022-09-20 11:39:51 +01:00
parent 3449ea35f2
commit be0305ec58
22 changed files with 262 additions and 109 deletions
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11
ingress/icmp_posix.go
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@@ -16,12 +16,15 @@ import (
)
// Opens a non-privileged ICMP socket on Linux and Darwin
func newICMPConn(listenIP netip.Addr) (*icmp.PacketConn, error) {
network := "udp6"
func newICMPConn(listenIP netip.Addr, zone string) (*icmp.PacketConn, error) {
if listenIP.Is4() {
network = "udp4"
return icmp.ListenPacket("udp4", listenIP.String())
}
return icmp.ListenPacket(network, listenIP.String())
listenAddr := listenIP.String()
if zone != "" {
listenAddr = listenAddr + "%" + zone
}
return icmp.ListenPacket("udp6", listenAddr)
}
func netipAddr(addr net.Addr) (netip.Addr, bool) {