57baac9504
On a connected socket sendmsg_x sends a whole batch in one syscall; msg_name is unsupported there, so batched sends require connecting to the peer, which loses roaming and is therefore opt-in via SetSinglePeerMode for single fixed-peer binds. recvmsg_x fills in per-message source addresses, so batched receive works on unconnected sockets too. Any unexpected errno permanently falls back to the generic paths. iOS is excluded: in the Network Extension recvmsg_x on unconnected UDP sockets delivers no data, and connected sockets stop passing traffic after a rebind.
30 lines
577 B
Go
30 lines
577 B
Go
//go:build !darwin || ios
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package conn
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import (
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"net"
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"golang.org/x/net/ipv6"
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)
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const supportsMsgX = false
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const msgXBatchSize = 1
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type msgXState struct{}
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func (m *msgXState) reset() {
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}
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// SetSinglePeerMode is a no-op on platforms without sendmsg_x/recvmsg_x.
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func (s *StdNetBind) SetSinglePeerMode() {
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}
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func (s *StdNetBind) sendMsgX(conn *net.UDPConn, msgs []ipv6.Message) (bool, error) {
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return false, nil
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}
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func (s *StdNetBind) makeReceiveMsgX(conn *net.UDPConn, isV6 bool) (ReceiveFunc, error) {
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panic("makeReceiveMsgX is not supported on this platform")
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}
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