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package libpod
import (
"fmt"
"net"
"os"
"regexp"
"strings"
"time"
"github.com/containers/podman/v3/libpod/define"
"github.com/containers/podman/v3/libpod/network/types"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// Timeout before declaring that runtime has failed to kill a given
// container
const killContainerTimeout = 5 * time.Second
// ociError is used to parse the OCI runtime JSON log. It is not part of the
// OCI runtime specifications, it follows what runc does
type ociError struct {
Level string `json:"level,omitempty"`
Time string `json:"time,omitempty"`
Msg string `json:"msg,omitempty"`
}
// Create systemd unit name for cgroup scopes
func createUnitName(prefix string, name string) string {
return fmt.Sprintf("%s-%s.scope", prefix, name)
}
// Bind ports to keep them closed on the host
func bindPorts(ports []types.PortMapping) ([]*os.File, error) {
var files []*os.File
sctpWarning := true
for _, port := range ports {
isV6 := net.ParseIP(port.HostIP).To4() == nil
if port.HostIP == "" {
isV6 = false
}
protocols := strings.Split(port.Protocol, ",")
for _, protocol := range protocols {
for i := uint16(0); i < port.Range; i++ {
f, err := bindPort(protocol, port.HostIP, port.HostPort+i, isV6, &sctpWarning)
if err != nil {
return files, err
}
if f != nil {
files = append(files, f)
}
}
}
}
return files, nil
}
func bindPort(protocol, hostIP string, port uint16, isV6 bool, sctpWarning *bool) (*os.File, error) {
var file *os.File
switch protocol {
case "udp":
var (
addr *net.UDPAddr
err error
)
if isV6 {
addr, err = net.ResolveUDPAddr("udp6", fmt.Sprintf("[%s]:%d", hostIP, port))
} else {
addr, err = net.ResolveUDPAddr("udp4", fmt.Sprintf("%s:%d", hostIP, port))
}
if err != nil {
return nil, errors.Wrapf(err, "cannot resolve the UDP address")
}
proto := "udp4"
if isV6 {
proto = "udp6"
}
server, err := net.ListenUDP(proto, addr)
if err != nil {
return nil, errors.Wrapf(err, "cannot listen on the UDP port")
}
file, err = server.File()
if err != nil {
return nil, errors.Wrapf(err, "cannot get file for UDP socket")
}
// close the listener
// note that this does not affect the fd, see the godoc for server.File()
err = server.Close()
if err != nil {
logrus.Warnf("Failed to close connection: %v", err)
}
case "tcp":
var (
addr *net.TCPAddr
err error
)
if isV6 {
addr, err = net.ResolveTCPAddr("tcp6", fmt.Sprintf("[%s]:%d", hostIP, port))
} else {
addr, err = net.ResolveTCPAddr("tcp4", fmt.Sprintf("%s:%d", hostIP, port))
}
if err != nil {
return nil, errors.Wrapf(err, "cannot resolve the TCP address")
}
proto := "tcp4"
if isV6 {
proto = "tcp6"
}
server, err := net.ListenTCP(proto, addr)
if err != nil {
return nil, errors.Wrapf(err, "cannot listen on the TCP port")
}
file, err = server.File()
if err != nil {
return nil, errors.Wrapf(err, "cannot get file for TCP socket")
}
// close the listener
// note that this does not affect the fd, see the godoc for server.File()
err = server.Close()
if err != nil {
logrus.Warnf("Failed to close connection: %v", err)
}
case "sctp":
if *sctpWarning {
logrus.Info("Port reservation for SCTP is not supported")
*sctpWarning = false
}
default:
return nil, fmt.Errorf("unknown protocol %s", protocol)
}
return file, nil
}
func getOCIRuntimeError(runtimeMsg string) error {
includeFullOutput := logrus.GetLevel() == logrus.DebugLevel
if match := regexp.MustCompile("(?i).*permission denied.*|.*operation not permitted.*").FindString(runtimeMsg); match != "" {
errStr := match
if includeFullOutput {
errStr = runtimeMsg
}
return errors.Wrapf(define.ErrOCIRuntimePermissionDenied, "%s", strings.Trim(errStr, "\n"))
}
if match := regexp.MustCompile("(?i).*executable file not found in.*|.*no such file or directory.*").FindString(runtimeMsg); match != "" {
errStr := match
if includeFullOutput {
errStr = runtimeMsg
}
return errors.Wrapf(define.ErrOCIRuntimeNotFound, "%s", strings.Trim(errStr, "\n"))
}
if match := regexp.MustCompile("`/proc/[a-z0-9-].+/attr.*`").FindString(runtimeMsg); match != "" {
errStr := match
if includeFullOutput {
errStr = runtimeMsg
}
if strings.HasSuffix(match, "/exec`") {
return errors.Wrapf(define.ErrSetSecurityAttribute, "%s", strings.Trim(errStr, "\n"))
} else if strings.HasSuffix(match, "/current`") {
return errors.Wrapf(define.ErrGetSecurityAttribute, "%s", strings.Trim(errStr, "\n"))
}
return errors.Wrapf(define.ErrSecurityAttribute, "%s", strings.Trim(errStr, "\n"))
}
return errors.Wrapf(define.ErrOCIRuntime, "%s", strings.Trim(runtimeMsg, "\n"))
}
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