// Reset resets a filter context, removing all its existing state.
// Accepts a new default action to be taken for syscalls which do not match.
// Returns an error if the filter or action provided are invalid.
func (f *ScmpFilter) Reset(defaultAction ScmpAction) error {
f.lock.Lock()
defer f.lock.Unlock()
if err := sanitizeAction(defaultAction); err != nil {
return err
} else if !f.valid {
return errBadFilter
}
retCode := C.seccomp_reset(f.filterCtx, defaultAction.toNative())
if retCode != 0 {
return syscall.Errno(-1 * retCode)
}
return nil
}
func Sandbox() {
//fmt.Printf("Attempting to sandbox...\n")
ctx := C.seccomp_init2()
if ctx == nil {
log.Fatalln("Failed to initialize seccomp!")
}
// DO SECCOMP STUFFS
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_read)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_write)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_close)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_gettimeofday)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_futex)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_exit_group)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_socket)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_epoll_ctl)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_mmap)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_mprotect)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_munmap)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_accept)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_fcntl)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_getsockname)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_setsockopt)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_rt_sigprocmask)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_clone)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_exit)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_bind)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_pipe)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_listen)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_restart_syscall)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_epoll_create1)
// Likely unneeded:
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_sigaltstack)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_set_robust_list)
C.seccomp_filter_call(ctx, C.SCMP_ACT_ALLOW, C.__NR_epoll_wait)
moo := C.seccomp_load(ctx)
moo = moo
rc := C.seccomp_reset(ctx, C.SCMP_ACT_KILL)
if rc < 0 {
log.Fatalln("Failed to reset seccomp!")
}
log.Printf("Started Seccomp Sandbox.")
}