56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
//go:build linux && (386 || amd64p32 || arm || mips || mipsle) && !android && !e2e_testing
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// +build linux
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// +build 386 amd64p32 arm mips mipsle
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// +build !android
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// +build !e2e_testing
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package udp
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import (
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"golang.org/x/sys/unix"
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)
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type iovec struct {
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Base *byte
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Len uint32
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}
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type msghdr struct {
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Name *byte
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Namelen uint32
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Iov *iovec
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Iovlen uint32
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Control *byte
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Controllen uint32
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Flags int32
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}
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type rawMessage struct {
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Hdr msghdr
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Len uint32
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}
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func (u *StdConn) PrepareRawMessages(n int) ([]rawMessage, [][]byte, [][]byte) {
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msgs := make([]rawMessage, n)
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buffers := make([][]byte, n)
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names := make([][]byte, n)
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for i := range msgs {
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buffers[i] = make([]byte, MTU)
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names[i] = make([]byte, unix.SizeofSockaddrInet6)
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//TODO: this is still silly, no need for an array
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vs := []iovec{
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{Base: &buffers[i][0], Len: uint32(len(buffers[i]))},
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}
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msgs[i].Hdr.Iov = &vs[0]
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msgs[i].Hdr.Iovlen = uint32(len(vs))
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msgs[i].Hdr.Name = &names[i][0]
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msgs[i].Hdr.Namelen = uint32(len(names[i]))
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}
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return msgs, buffers, names
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}
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