bagas
5857dec730
Reviewed-on: #157 Co-authored-by: Bagas <bagas@fossy.my.id> Co-committed-by: Bagas <bagas@fossy.my.id>
89 lines
1.6 KiB
Go
89 lines
1.6 KiB
Go
package port
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"sync"
|
|
)
|
|
|
|
type Port interface {
|
|
AddRange(startPort, endPort uint16) error
|
|
Unassigned() (uint16, bool)
|
|
SetStatus(port uint16, assigned bool) error
|
|
Claim(port uint16) (claimed bool)
|
|
}
|
|
|
|
type port struct {
|
|
mu sync.RWMutex
|
|
ports map[uint16]bool
|
|
sortedPorts []uint16
|
|
}
|
|
|
|
func New() Port {
|
|
return &port{
|
|
ports: make(map[uint16]bool),
|
|
sortedPorts: []uint16{},
|
|
}
|
|
}
|
|
|
|
func (pm *port) AddRange(startPort, endPort uint16) error {
|
|
pm.mu.Lock()
|
|
defer pm.mu.Unlock()
|
|
|
|
if startPort > endPort {
|
|
return fmt.Errorf("start port cannot be greater than end port")
|
|
}
|
|
for index := startPort; ; index++ {
|
|
if index != 0 {
|
|
if _, exists := pm.ports[index]; !exists {
|
|
pm.ports[index] = false
|
|
pm.sortedPorts = append(pm.sortedPorts, index)
|
|
}
|
|
}
|
|
if index == endPort {
|
|
break
|
|
}
|
|
}
|
|
sort.Slice(pm.sortedPorts, func(i, j int) bool {
|
|
return pm.sortedPorts[i] < pm.sortedPorts[j]
|
|
})
|
|
return nil
|
|
}
|
|
|
|
func (pm *port) Unassigned() (uint16, bool) {
|
|
pm.mu.Lock()
|
|
defer pm.mu.Unlock()
|
|
|
|
for _, index := range pm.sortedPorts {
|
|
if !pm.ports[index] {
|
|
pm.ports[index] = true
|
|
return index, true
|
|
}
|
|
}
|
|
return 0, false
|
|
}
|
|
|
|
func (pm *port) SetStatus(port uint16, assigned bool) error {
|
|
pm.mu.Lock()
|
|
defer pm.mu.Unlock()
|
|
|
|
if _, exists := pm.ports[port]; !exists {
|
|
return fmt.Errorf("port %d is not in the allowed range", port)
|
|
}
|
|
pm.ports[port] = assigned
|
|
return nil
|
|
}
|
|
|
|
func (pm *port) Claim(port uint16) (claimed bool) {
|
|
pm.mu.Lock()
|
|
defer pm.mu.Unlock()
|
|
|
|
status, exists := pm.ports[port]
|
|
if !exists || status {
|
|
return false
|
|
}
|
|
|
|
pm.ports[port] = true
|
|
return true
|
|
}
|