40 lines
1.1 KiB
Go
40 lines
1.1 KiB
Go
package utils
|
|
|
|
import (
|
|
"log"
|
|
"github.com/google/gopacket"
|
|
|
|
"saprusserver/structs"
|
|
)
|
|
|
|
func (c* SocketCall) FileTransferPacket(message string) gopacket.SerializeBuffer {
|
|
eth, ip, udp := basePacket(c)
|
|
|
|
sapFile := structs.SaprusFileTransfer {
|
|
Flag: [1]byte{0x11},
|
|
Sequence: [2]byte{0x22, 0x33},
|
|
Checksum: [2]byte{0x44, 0x44},
|
|
Payload: []byte(message),
|
|
}
|
|
|
|
sapHeader := structs.SaprusHeaderFrame {
|
|
PacketType: [2]byte{0x88, 0x88},
|
|
Length: c.saprusPayloadLength(sapFile.Bytes()),
|
|
Payload: sapFile.Bytes(),
|
|
}
|
|
|
|
buf := gopacket.NewSerializeBuffer()
|
|
opts := gopacket.SerializeOptions {
|
|
ComputeChecksums: true,
|
|
FixLengths: true,
|
|
}
|
|
|
|
udp.SetNetworkLayerForChecksum(&ip)
|
|
err := gopacket.SerializeLayers(buf, opts, ð, &ip, &udp, gopacket.Payload(sapHeader.Bytes()))
|
|
if err != nil {
|
|
log.Panic(err)
|
|
}
|
|
return buf
|
|
}
|
|
|