mirror of
https://github.com/slackhq/nebula.git
synced 2024-11-10 17:24:37 +08:00
54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
// +build linux
|
|
// +build amd64 arm64 ppc64 ppc64le mips64 mips64le s390x
|
|
// +build !android
|
|
|
|
package nebula
|
|
|
|
import "unsafe"
|
|
|
|
type iovec struct {
|
|
Base *byte
|
|
Len uint64
|
|
}
|
|
|
|
type msghdr struct {
|
|
Name *byte
|
|
Namelen uint32
|
|
Pad0 [4]byte
|
|
Iov *iovec
|
|
Iovlen uint64
|
|
Control *byte
|
|
Controllen uint64
|
|
Flags int32
|
|
Pad1 [4]byte
|
|
}
|
|
|
|
type rawMessage struct {
|
|
Hdr msghdr
|
|
Len uint32
|
|
Pad0 [4]byte
|
|
}
|
|
|
|
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, 0x1c) //TODO = sizeofSockaddrInet6
|
|
|
|
//TODO: this is still silly, no need for an array
|
|
vs := []iovec{
|
|
{Base: (*byte)(unsafe.Pointer(&buffers[i][0])), Len: uint64(len(buffers[i]))},
|
|
}
|
|
|
|
msgs[i].Hdr.Iov = &vs[0]
|
|
msgs[i].Hdr.Iovlen = uint64(len(vs))
|
|
|
|
msgs[i].Hdr.Name = (*byte)(unsafe.Pointer(&names[i][0]))
|
|
msgs[i].Hdr.Namelen = uint32(len(names[i]))
|
|
}
|
|
|
|
return msgs, buffers, names
|
|
}
|