139 lines
3.5 KiB
Go
139 lines
3.5 KiB
Go
package lockserver
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import (
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"bufio"
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"fmt"
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"net"
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"os"
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"strconv"
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"strings"
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"time"
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log "github.com/sirupsen/logrus"
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)
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// Build key encoding request command for the Omnitec lock server.
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func (lock *OmniLockServer) BuildCommand(doorReq DoorCardRequest, checkIn, checkOut time.Time) error {
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const funcName = "OmniLockServer.BuildCommand"
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hostname, err := os.Hostname()
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if err != nil {
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return fmt.Errorf("[%s] failed to get hostname: %v", funcName, err)
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}
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// Format lockId as 4-digit zero-padded string
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idInt, err := strconv.Atoi(doorReq.RoomField)
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if err != nil {
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return fmt.Errorf("[%s] failed to convert lockId to integer: %v", funcName, err)
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}
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formattedLockId := fmt.Sprintf("%04d", idInt)
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// Format date/time parts
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dt := checkOut.Format("15:04") // DT = HH:mm
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ga := checkIn.Format("060102") // GA = ddMMyy
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gd := checkOut.Format("060102") // GD = ddMMyy
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ti := checkIn.Format("150405") // TI = HHmmss
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// Construct payload
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payload := fmt.Sprintf(
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"KR|KC%s|KTD|RN%s|%s|DT%s|G#75|GA%s|GD%s|KO0000|DA%s|TI%s|",
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lock.encoderAddr,
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formattedLockId,
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hostname,
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dt,
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ga,
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gd,
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ga,
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ti,
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)
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// Assign to command field with STX and ETX
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lock.command = append([]byte{0x02}, append([]byte(payload), 0x03)...)
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return nil
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}
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// Starts link to the Omnitec lock server and perform key encoding
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func (lock *OmniLockServer) LockSequence() error {
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const funcName = "OmniLockServer.LockSequence"
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conn, err := net.Dial("tcp", lock.encoderAddr)
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if err != nil {
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return err
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}
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defer conn.Close()
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// Start the link with the lock server
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regs, err := lock.linkStart(conn)
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if err != nil {
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return fmt.Errorf("[%s] linkStart failed: %v", funcName, err)
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}
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for _, reg := range regs {
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log.Printf("Received: %q", reg)
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}
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// Request encoding from the lock server
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raw, err := lock.requestEncoding(conn)
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if err != nil {
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return fmt.Errorf("[%s] request encoding failed: %v", funcName, err)
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}
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log.Infof("Encoding response: %s", raw)
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return nil
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}
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func (lock *OmniLockServer) linkStart(conn net.Conn) ([]string, error) {
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payload := fmt.Sprintf("LS|DA%s|TI%s|",
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time.Now().Format("060102"),
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time.Now().Format("150405"),
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)
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command := append([]byte{0x02}, append([]byte(payload), 0x03)...)
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log.Printf("Sending command: %q", command)
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_, err := conn.Write(command)
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if err != nil {
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return nil, fmt.Errorf("failed to send command: %v", err)
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}
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conn.SetReadDeadline(time.Now().Add(10 * time.Second))
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reader := bufio.NewReader(conn)
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var registers []string
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for {
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reg, err := reader.ReadString(0x03)
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if err != nil {
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if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
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break // timeout -> assume no more registers
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}
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return nil, fmt.Errorf("error reading register: %v", err)
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}
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registers = append(registers, reg)
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// stop when you see the final register type, e.g. "LA|…|<ETX>"
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if strings.HasPrefix(reg, "\x02LA|") {
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break
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}
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}
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return registers, nil
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}
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func (lock *OmniLockServer) requestEncoding(conn net.Conn) (string, error) {
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raw, err := sendAndReceive(conn, lock.command)
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if err != nil {
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return "", fmt.Errorf("failed to send Encoding request: %v", err)
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}
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return parseOmniResponse(raw)
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}
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func parseOmniResponse(raw string) (string, error) {
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clean := strings.Trim(raw, "\x02\x03")
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idx := strings.Index(clean, "AS")
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code := clean[idx+2 : idx+4] // Extract the response code
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code = strings.ToLower(code) // Convert to lowercase for consistency
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if code != "ok" {
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return "", fmt.Errorf("negative response code: %s", clean)
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}
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return "Success: " + clean, nil
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} |