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package main
// #cgo CFLAGS: -I${SRCDIR}/../salticidae/include/
// #include "salticidae/network.h"
// void onTerm(int sig);
// void onReceiveHello(msg_t *, msgnetwork_conn_t *, void *);
// void onReceiveAck(msg_t *, msgnetwork_conn_t *, void *);
// void connHandler(msgnetwork_conn_t *, bool, void *);
import "C"
import (
"encoding/binary"
"fmt"
"unsafe"
"salticidae-go"
)
var ec salticidae.EventContext
const (
MSG_OPCODE_HELLO salticidae.Opcode = iota
MSG_OPCODE_ACK
)
//export onTerm
func onTerm(_ C.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.NewMsgMovedFromByteArray(
MSG_OPCODE_HELLO,
salticidae.NewByteArrayMovedFromDataStream(serialized))
}
func msgHelloUnserialize(msg salticidae.Msg) MsgHello {
p := msg.ConsumePayload()
length := binary.LittleEndian.Uint32(p.GetDataInPlace(4))
name := string(p.GetDataInPlace(int(length)))
text := string(p.GetDataInPlace(p.Size()))
p.Free()
return MsgHello { name: name, text: text }
}
func msgAckSerialize() salticidae.Msg {
return salticidae.NewMsgMovedFromByteArray(MSG_OPCODE_ACK, salticidae.NewByteArray())
}
type MyNet struct {
net salticidae.MsgNetwork
name string
}
var alice, bob MyNet
//export onReceiveHello
func onReceiveHello(__msg *C.struct_msg_t, _conn *C.struct_msgnetwork_conn_t, _ unsafe.Pointer) {
_msg := salticidae.Msg(__msg)
conn := salticidae.MsgNetworkConn(_conn)
net := conn.GetNet()
name := bob.name
if net == alice.net {
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()
}
//export onReceiveAck
func onReceiveAck(_ *C.struct_msg_t, _conn *C.struct_msgnetwork_conn_t, _ unsafe.Pointer) {
conn := salticidae.MsgNetworkConn(_conn)
net := conn.GetNet()
name := bob.name
if net == alice.net {
name = alice.name
}
fmt.Printf("[%s] the peer knows\n", name)
}
//export connHandler
func connHandler(_conn *C.struct_msgnetwork_conn_t, connected C.bool, _ unsafe.Pointer) {
conn := salticidae.MsgNetworkConn(_conn)
net := conn.GetNet()
n := &bob
if net == alice.net {
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.RegHandler(MSG_OPCODE_HELLO, salticidae.MsgNetworkMsgCallback(C.onReceiveHello), nil)
alice.net.RegHandler(MSG_OPCODE_ACK, salticidae.MsgNetworkMsgCallback(C.onReceiveAck), nil)
alice.net.RegConnHandler(salticidae.MsgNetworkConnCallback(C.connHandler), nil)
bob.net.RegHandler(MSG_OPCODE_HELLO, salticidae.MsgNetworkMsgCallback(C.onReceiveHello), nil)
bob.net.RegHandler(MSG_OPCODE_ACK, salticidae.MsgNetworkMsgCallback(C.onReceiveAck), nil)
bob.net.RegConnHandler(salticidae.MsgNetworkConnCallback(C.connHandler), nil)
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(C.onTerm))
ev_int.Add(salticidae.SIGINT)
ev_term := salticidae.NewSigEvent(ec, salticidae.SigEventCallback(C.onTerm))
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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