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88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
package port
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import (
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"fmt"
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"sort"
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"strconv"
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"strings"
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"sync"
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"tunnel_pls/utils"
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)
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type PortManager struct {
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mu sync.RWMutex
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ports map[uint16]bool
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sortedPorts []uint16
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}
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var Manager = PortManager{
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ports: make(map[uint16]bool),
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sortedPorts: []uint16{},
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}
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func init() {
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rawRange := utils.Getenv("ALLOWED_PORTS")
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splitRange := strings.Split(rawRange, "-")
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if len(splitRange) != 2 {
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Manager.AddPortRange(30000, 31000)
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} else {
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start, err := strconv.ParseUint(splitRange[0], 10, 16)
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if err != nil {
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start = 30000
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}
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end, err := strconv.ParseUint(splitRange[1], 10, 16)
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if err != nil {
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end = 31000
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}
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Manager.AddPortRange(uint16(start), uint16(end))
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}
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}
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func (pm *PortManager) AddPortRange(startPort, endPort uint16) error {
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pm.mu.Lock()
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defer pm.mu.Unlock()
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if startPort > endPort {
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return fmt.Errorf("start port cannot be greater than end port")
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}
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for port := startPort; port <= endPort; port++ {
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if _, exists := pm.ports[port]; !exists {
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pm.ports[port] = false
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pm.sortedPorts = append(pm.sortedPorts, port)
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}
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}
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sort.Slice(pm.sortedPorts, func(i, j int) bool {
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return pm.sortedPorts[i] < pm.sortedPorts[j]
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})
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return nil
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}
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func (pm *PortManager) GetUnassignedPort() (uint16, bool) {
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pm.mu.Lock()
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defer pm.mu.Unlock()
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for _, port := range pm.sortedPorts {
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if !pm.ports[port] {
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pm.ports[port] = true
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return port, true
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}
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}
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return 0, false
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}
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func (pm *PortManager) SetPortStatus(port uint16, assigned bool) error {
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pm.mu.Lock()
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defer pm.mu.Unlock()
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pm.ports[port] = assigned
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return nil
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}
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func (pm *PortManager) GetPortStatus(port uint16) (bool, bool) {
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pm.mu.RLock()
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defer pm.mu.RUnlock()
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status, exists := pm.ports[port]
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return status, exists
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}
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