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package main
import (
"errors"
"sync"
)
var(
containers = []*ChallengeContainer{}
containerStartLock sync.Mutex
containerStopLock sync.Mutex
)
// Checks if the given container name is already running
func isChallengeContainerRunning(name string) (bool) {
for _, c := range containers {
if c.Challenge.Name == name {
return true
}
}
return false
}
// Starts the given container. Thread-safe!
func startChallengeContainer(c Challenge) (*ChallengeContainer, error) {
// Lock procedure to avoid race conditions
containerStartLock.Lock()
defer containerStartLock.Unlock()
if(isChallengeContainerRunning(c.Name)) {
return nil, errors.New("Container already running")
}
cc := ChallengeContainer{Challenge: &c}
address, containerID, err := cc.startContainer()
if err != nil {
return nil, err
}
cc.IP = address
cc.ContainerID = containerID
// Add container to list
containers = append(containers, &cc)
return &cc, nil
}
// Stops the given container. Thread-safe!
func stopChallengeContainer(name string) {
containerStopLock.Lock()
defer containerStopLock.Unlock()
for index, c := range containers {
if c.Challenge.Name == name {
c.stopContainer()
containers = append(containers[:index], containers[index+1:]...)
return
}
}
}
// Returns the address for the given container, if there is a container with this name running
func getAddressForChallengeContainer(container string) (address string) {
for _, c := range containers {
if c.Challenge.Container == container {
return c.IP
}
}
return ""
}
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