61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package cli
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import (
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"fmt"
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"math/rand"
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"net/http"
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"strings"
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"time"
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"github.com/qdm12/golibs/files"
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"github.com/qdm12/golibs/network"
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"github.com/qdm12/private-internet-access-docker/internal/constants"
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)
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func HealthCheck() error {
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// Get all VPN ip addresses from openvpn configuration file
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fileManager := files.NewFileManager()
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b, err := fileManager.ReadFile(string(constants.OpenVPNConf))
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if err != nil {
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return err
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}
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var vpnIPs []string
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for _, line := range strings.Split(string(b), "\n") {
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if strings.HasPrefix(line, "remote ") {
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vpnIPs = append(vpnIPs, strings.TrimPrefix(line, "remote "))
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}
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}
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// Get public IP address from one of the following urls
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urls := []string{
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"http://ip1.dynupdate.no-ip.com:8245",
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"http://ip1.dynupdate.no-ip.com",
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"https://api.ipify.org",
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"https://diagnostic.opendns.com/myip",
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"https://domains.google.com/checkip",
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"https://ifconfig.io/ip",
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"https://ip4.ddnss.de/meineip.php",
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"https://ipinfo.io/ip",
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}
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url := urls[rand.Intn(len(urls))]
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client := network.NewClient(3 * time.Second)
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content, status, err := client.GetContent(url, network.UseRandomUserAgent())
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if err != nil {
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return err
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} else if status != http.StatusOK {
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return fmt.Errorf("Received unexpected status code %d from %s", status, url)
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}
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publicIP := strings.ReplaceAll(string(content), "\n", "")
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match := false
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for _, vpnIP := range vpnIPs {
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if publicIP == vpnIP {
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match = true
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break
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}
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}
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if !match {
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return fmt.Errorf("Public IP address %s does not match any of the VPN ip addresses %s", publicIP, strings.Join(vpnIPs, ", "))
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}
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return nil
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}
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