Feature: Start and stop challenge containers

1 files changed, 70 insertions, 0 deletions

diff --git a/src/container.go b/src/container.go
new file mode 100644
index 0000000..73912bf
--- /dev/null
+++ b/src/container.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"context"
+	"github.com/docker/docker/client"
+	"github.com/docker/docker/api/types/container"
+	"github.com/docker/docker/api/types"
+	"fmt"
+	"time"
+)
+
+type ChallengeContainer struct {
+	Challenge *Challenge
+	ContainerID string
+	IP string
+}
+
+var (
+	dockerCtx context.Context
+	dockerCli *client.Client
+)
+
+// Starts the container and returns its address and containerID if successful
+func (cc ChallengeContainer) startContainer() (address string, containerID string, err error) {
+	// Set up our context if there is none already set up
+	if dockerCtx == nil {
+		dockerCtx = context.Background()
+	}
+
+	// Set up our Docker CLI connection if there is not already one
+	if dockerCli == nil {
+		dockerCli, err = client.NewEnvClient()
+
+		if err != nil {
+			return "", "", err
+		}
+	}
+
+	// Create container
+	resp, err := dockerCli.ContainerCreate(dockerCtx, &container.Config{
+		Image: cc.Challenge.Container,
+		Env: []string{fmt.Sprintf("FLAG=%s", cc.Challenge.Flag)},
+		Tty: false,
+	}, nil, nil, "")
+
+	if err != nil {
+		return "", "", err
+	}
+
+	// Start container
+	err = dockerCli.ContainerStart(dockerCtx, resp.ID, types.ContainerStartOptions{})
+	if err != nil {
+		return "", "", err
+	}
+
+	// Get IP Address of that container
+	inspectJSON, err := dockerCli.ContainerInspect(dockerCtx, resp.ID)
+	if err != nil {
+		return "", "", err
+	}
+
+	// Return IP, Container ID and error
+	return inspectJSON.NetworkSettings.IPAddress, resp.ID,nil
+}
+
+// Stops the container with a timeout of one second
+func (cc ChallengeContainer) stopContainer() {
+	timeout := time.Second
+	dockerCli.ContainerStop(dockerCtx, cc.ContainerID, &timeout)
+}