| 11 | int conn; //This is the connection file descriptor that will be used to distinguish client connections. |
| 12 | |
| 13 | static int easy_filter(void) |
| 14 | { |
| 15 | struct sock_filter filter[] = { |
| 16 | /* Validate architecture. */ |
| 17 | VALIDATE_ARCHITECTURE, |
| 18 | /* Grab the system call number. */ |
| 19 | EXAMINE_SYSCALL, |
| 20 | /* List allowed syscalls. */ |
| 21 | DISALLOW_SYSCALL(execve), |
| 22 | ALLOW_PROCESS, |
| 23 | }; |
| 24 | struct sock_fprog prog = { |
| 25 | .len = (unsigned short)(sizeof(filter)/sizeof(filter[0])), |
| 26 | .filter = filter, |
| 27 | }; |
| 28 | |
| 29 | if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)) { |
| 30 | printf("prctl(NO_NEW_PRIVS)"); |
| 31 | goto failed2; |
| 32 | } |
| 33 | if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog)) { |
| 34 | printf("prctl(SECCOMP)"); |
| 35 | printf("Test\n"); |
| 36 | goto failed2; |
| 37 | } |
| 38 | return 0; |
| 39 | |
| 40 | failed2: |
| 41 | if (errno == EINVAL){ |
| 42 | printf("SECCOMP_FILTER is not available. :(\n"); |
| 43 | exit(0); |
| 44 | } |
| 45 | return 1; |
| 46 | } |
| 47 | |
| 48 | |
| 49 | static int difficult_filter(void) |