func (route *NetRoute) AddNextHop() (*NetRouteNextHop, error) {
nh := C.libct_net_route_add_nh(route.route)
if C.libct_handle_is_err(unsafe.Pointer(nh)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(nh)))}
}
return &NetRouteNextHop{nh}, nil
}
func (s *Session) ProcessCreateDesc() (*ProcessDesc, error) {
p := C.libct_process_desc_create(s.s)
if C.libct_handle_is_err(unsafe.Pointer(p)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(p)))}
}
return &ProcessDesc{desc: p}, nil
}
func (ct *Container) AddRoute() (*NetRoute, error) {
r := C.libct_net_route_add(ct.ct)
if C.libct_handle_is_err(unsafe.Pointer(r)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(r)))}
}
return &NetRoute{r}, nil
}
func (nd *NetDev) GetPeer() (*NetDev, error) {
dev := C.libct_net_dev_get_peer(nd.dev)
if C.libct_handle_is_err(unsafe.Pointer(dev)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(dev)))}
}
return &NetDev{dev}, nil
}
func (s *Session) OpenLocal() error {
h := C.libct_session_open_local()
if C.libct_handle_is_err(unsafe.Pointer(h)) != 0 {
return LibctError{int(C.libct_handle_to_err(unsafe.Pointer(h)))}
}
s.s = h
return nil
}
func (s *Session) ContainerCreate(name string) (*Container, error) {
cname := C.CString(name)
defer C.free(unsafe.Pointer(cname))
ct := C.libct_container_create(s.s, cname)
if C.libct_handle_is_err(unsafe.Pointer(ct)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(ct)))}
}
return &Container{ct}, nil
}
func (ct *Container) Load(p *ProcessDesc, pid int) error {
h := C.libct_container_load(ct.ct, C.pid_t(pid))
if C.libct_handle_is_err(unsafe.Pointer(h)) != 0 {
p.closeDescriptors(p.closeAfterStart)
p.closeDescriptors(p.closeAfterWait)
return LibctError{int(C.libct_handle_to_err(unsafe.Pointer(h)))}
}
p.handle = h
return nil
}
func (ct *Container) Processes() ([]int, error) {
ctasks := C.libct_container_processes(ct.ct)
if C.libct_handle_is_err(unsafe.Pointer(ctasks)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(ctasks)))}
}
defer C.libct_processes_free(ctasks)
tasks := make([]int, int(ctasks.nproc))
for i := 0; i < int(ctasks.nproc); i++ {
tasks[i] = int(C.libct_processes_get(ctasks, C.int(i)))
}
return tasks, nil
}
func (ct *Container) AddNetVeth(host_name string, ct_name string) (*NetDev, error) {
var args C.struct_ct_net_veth_arg
chost_name := C.CString(host_name)
defer C.free(unsafe.Pointer(chost_name))
cct_name := C.CString(ct_name)
defer C.free(unsafe.Pointer(cct_name))
args.host_name = chost_name
args.ct_name = cct_name
dev := C.libct_net_add(ct.ct, C.CT_NET_VETH, unsafe.Pointer(&args))
if C.libct_handle_is_err(unsafe.Pointer(dev)) != 0 {
return nil, LibctError{int(C.libct_handle_to_err(unsafe.Pointer(dev)))}
}
return &NetDev{dev}, nil
}
func (ct *Container) execve(p *ProcessDesc, path string, argv []string, env []string, spawn bool) error {
var (
h C.ct_process_t
i int = 0
)
type F func(*ProcessDesc) (file, error)
for _, setupFd := range []F{(*ProcessDesc).stdin, (*ProcessDesc).stdout, (*ProcessDesc).stderr} {
fd, err := setupFd(p)
if err != nil {
p.closeDescriptors(p.closeAfterStart)
p.closeDescriptors(p.closeAfterWait)
return err
}
p.childFiles = append(p.childFiles, fd)
i = i + 1
}
freeStrings := func(array []*C.char) {
for _, item := range array {
if item != nil {
C.free(unsafe.Pointer(item))
}
}
}
p.childFiles = append(p.childFiles, p.ExtraFiles...)
cargv := make([]*C.char, len(argv)+1)
defer freeStrings(cargv)
for i, arg := range argv {
cargv[i] = C.CString(arg)
}
var penv **C.char
if env == nil {
penv = nil
} else {
cenv := make([]*C.char, len(env)+1)
defer freeStrings(cenv)
for i, e := range env {
cenv[i] = C.CString(e)
}
penv = &cenv[0]
}
cfds := make([]C.int, len(p.childFiles))
for i, fd := range p.childFiles {
cfds[i] = C.int(getFd(fd))
}
C.libct_process_desc_set_fds(p.desc, &cfds[0], C.int(len(p.childFiles)))
cpath := C.CString(path)
defer C.free(unsafe.Pointer(cpath))
if spawn {
h = C.libct_container_spawn_execve(ct.ct, p.desc, cpath, &cargv[0], penv)
} else {
h = C.libct_container_enter_execve(ct.ct, p.desc, cpath, &cargv[0], penv)
}
if C.libct_handle_is_err(unsafe.Pointer(h)) != 0 {
p.closeDescriptors(p.closeAfterStart)
p.closeDescriptors(p.closeAfterWait)
return LibctError{int(C.libct_handle_to_err(unsafe.Pointer(h)))}
}
p.closeDescriptors(p.closeAfterStart)
p.errch = make(chan error, len(p.goroutine))
for _, fn := range p.goroutine {
go func(fn func() error) {
p.errch <- fn()
}(fn)
}
p.handle = h
return nil
}