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package main
// void onTerm_cgo(int sig);
import "C"
import (
"unsafe"
"encoding/binary"
"fmt"
"salticidae-go"
)
var ec salticidae.EventContext
const (
MSG_OPCODE_HELLO salticidae.Opcode = iota
MSG_OPCODE_ACK
)
//export onTerm
func onTerm(_ int) {
ec.Stop()
}
type MsgHello struct {
name string
text string
}
func msgHelloSerialize(name string, text string) salticidae.Msg {
serialized := salticidae.NewDataStream()
t := make([]byte, 4)
binary.LittleEndian.PutUint32(t, uint32(len(name)))
serialized.PutData(t)
serialized.PutData([]byte(name))
serialized.PutData([]byte(text))
return salticidae.NewMsg(MSG_OPCODE_HELLO, serialized.ToByteArray())
}
func msgHelloUnserialize(msg salticidae.Msg) MsgHello {
p := msg.GetPayload()
length := binary.LittleEndian.Uint32(p.GetData(4))
name := string(p.GetData(int(length)))
text := string(p.GetData(p.Size()))
p.Free()
return MsgHello { name: name, text: text }
}
func msgAckSerialize() salticidae.Msg {
return salticidae.NewMsg(MSG_OPCODE_ACK, salticidae.NewByteArray())
}
type MyNet struct {
net salticidae.MsgNetwork
name string
}
var alice, bob MyNet
func onReceiveHello(_msg salticidae.Msg, conn salticidae.MsgNetworkConn) {
net := conn.GetNet()
name := bob.name
if net == alice.net.GetInner() {
name = alice.name
}
msg := msgHelloUnserialize(_msg)
fmt.Printf("[%s] %s says %s\n", name, msg.name, msg.text)
ack := msgAckSerialize()
net.SendMsg(ack, conn)
ack.Free()
}
func onReceiveAck(msg salticidae.Msg, conn salticidae.MsgNetworkConn) {
net := conn.GetNet()
name := bob.name
if net == alice.net.GetInner() {
name = alice.name
}
fmt.Printf("[%s] the peer knows\n", name)
}
func connHandler(conn salticidae.MsgNetworkConn, connected bool) {
net := conn.GetNet()
n := &bob
if net == alice.net.GetInner() {
n = &alice
}
name := n.name
if connected {
if conn.GetMode() == salticidae.CONN_MODE_ACTIVE {
fmt.Printf("[%s] Connected, sending hello.", name)
hello := msgHelloSerialize(name, "Hello there!")
n.net.SendMsg(hello, conn)
hello.Free()
} else {
fmt.Printf("[%s] Accepted, waiting for greetings.\n", name)
}
} else {
fmt.Printf("[%s] Disconnected, retrying.\n", name)
net.Connect(conn.GetAddr())
}
}
func genMyNet(ec salticidae.EventContext, name string) MyNet {
netconfig := salticidae.NewMsgNetworkConfig()
n := MyNet {
net: salticidae.NewMsgNetwork(ec, netconfig),
name: name,
}
netconfig.Free()
return n
}
func main() {
ec = salticidae.NewEventContext()
alice_addr := salticidae.NewAddrFromIPPortString("127.0.0.1:12345")
bob_addr := salticidae.NewAddrFromIPPortString("127.0.0.1:12346")
alice := genMyNet(ec, "Alice")
bob := genMyNet(ec, "Bob")
alice.net.Start()
bob.net.Start()
alice.net.Listen(alice_addr)
bob.net.Listen(bob_addr)
alice.net.Connect(bob_addr)
bob.net.Connect(alice_addr)
alice_addr.Free()
bob_addr.Free()
ev_int := salticidae.NewSigEvent(ec, salticidae.SigEventCallback(unsafe.Pointer(C.onTerm_cgo)))
ev_int.Add(salticidae.SIGINT)
ev_term := salticidae.NewSigEvent(ec, salticidae.SigEventCallback(unsafe.Pointer(C.onTerm_cgo)))
ev_term.Add(salticidae.SIGTERM)
ec.Dispatch()
ev_int.Free()
ev_term.Free()
alice.net.Free()
bob.net.Free()
ec.Free()
}
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