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path: root/misc/main.go
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package main

import (
	"encoding/binary"
	"encoding/hex"
	"flag"
	"fmt"
	"log"
	"net"
)

var service = flag.String("service", "192.168.240.20:33333", "PBX CTI Service")

func init() {
	flag.Parse()
}

/* A-ASSOCIATE Request
 *
 * 60 23				AARQ-apdu
 *    80 02 07 08			protocol-version { version1 }
 *    A1 07				application-context-name
 *       06 05 2B 0C 00 81 5A		{ 1 3 12 0 218 }
 *    BE 14				user-information
 *       28 12
 *          06 07 2B 0C 00 82 1D 81 48	derect-reference { 1 3 12 0 285 200 }
 *          A0 07			single-ASN1-type
 *					(ACSEUserInfomrationForCSTA)
 *             A0 05			newDefinition
 *                03 03 00 08 00	cSTAVersion { versionFive }
 */

var associate = []byte{
	0x60, 0x23,
	0x80, 0x02, 0x07, 0x80,
	0xA1, 0x07,
	0x06, 0x05, 0x2B, 0x0C, 0x00, 0x81, 0x5A,
	0xBE, 0x14,
	0x28, 0x12,
	0x06, 0x07, 0x2B, 0x0C, 0x00, 0x82, 0x1D, 0x81, 0x48,
	0xA0, 0x07,
	0xA0, 0x05,
	0x03, 0x03, 0x00, 0x08, 0x00,
}

/* A-ACCOCIATE Result
 * 61 2F				AARE-apdu
 *    80 02 07 80			protocol-version { version1 }
 *    A1 07				application-context-name
 *       06 05 2B 0C 00 81 5A		{ 1 3 12 0 218 }
 *    A2 03				result
 *       02 01 00			accepted
 *    A3 05				result-source-diagnostic
 *       A1 03				acse-service-user
 *          02 01 00			no-reason-given
 *    BE 14				user-information
 *       28 12
 *          06 07 2B 0C 00 82 1D 81 48	direct-reference { 1 3 120 285 200 }
 *          A0 07			single-ASN1-type
 *					(ACSEUserInformationForCSTA)
 *             A0 05			newDefinition
 *                03 03 00 08 00	cSTAVersion { versionFive }
 */

/* A-RELEASE Request
 *
 * 62 00				RLRQ-apdu
 */

var release = []byte{0x62, 0x00}

/* A-RELEASE Result
 *
 * 63 00				RLRE-apdu
 */

/* SystemStatus Request
 * A1 0C				ROSE-Invoke
 *    02 01 01				invokeId present: 1
 *    02 02 00 D3			opcode local: 211
 *    30 03				SystemStatusArgiment
 *       0A 01 02			systemStatus normal
 */

/* SystemStatus Result
 * A2 0B				ROSE-ReturnResult
 *    02 01 01				invokeId present: 1
 *    30 06				SystemStatusResult
 *       02 02 00 D3			opcode local: 211
 *       05 00				noData
 */

var status = []byte{
	0xA2, 0x0B,
	0x02, 0x01, 0x01,
	0x30, 0x06,
	0x02, 0x02, 0x00, 0xD3,
	0x05, 0x00,
}

/* A-ABORT
 * 64 03				ABRT-apdu
 *    80 01 00				ABRT-source: acse-service-user
 */

var nbo = binary.BigEndian // Network Byte Order

func send(c net.Conn, b []byte) {
	size := int16(len(b))
	if err := binary.Write(c, nbo, size); err != nil {
		log.Fatal(err)
	}
	if err := binary.Write(c, nbo, b); err != nil {
		log.Fatal(err)
	}
}

func recv(c net.Conn) []byte {
	var size int16
	if err := binary.Read(c, nbo, &size); err != nil {
		log.Fatal(err)
	}
	r := make([]byte, size)
	if err := binary.Read(c, nbo, r); err != nil {
		log.Fatal(err)
	}
	return r
}

func dump(b []byte, dir string) {
	log.Println(dir)
	fmt.Println(hex.Dump(b))
}

func Associate(c net.Conn) {
	dump(associate, ">>> Send associate")
	send(c, associate)
	in := recv(c)
	dump(in, "<<< Recv associate")
}

func Release(c net.Conn) {
	dump(release, ">>> Send release")
	send(c, release)
	in := recv(c)
	dump(in, "<<< Recv release")
}

func Status(c net.Conn) {
	in := recv(c)
	dump(in, "<<< Recv status")
	out := status
	out[4] = in[4]
	dump(out, ">>> Send status")
	send(c, out)
}

func main() {
	conn, err := net.Dial("tcp", *service)
	if err != nil {
		log.Fatal(err)
	}
	defer conn.Close()

	Associate(conn)
	defer Release(conn)

	for i := 0; i < 3; i++ {
		Status(conn)
	}
}