nebula/udp_linux_32.go

55 lines
998 B
Go

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