Stephen Smalley | f074036 | 2012-01-04 12:30:47 -0500 | [diff] [blame] | 1 | /* |
| 2 | * User-supplied callbacks and default implementations. |
| 3 | * Class and permission mappings. |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <stdlib.h> |
| 8 | #include <stdarg.h> |
| 9 | #include <errno.h> |
| 10 | #include <selinux/selinux.h> |
| 11 | #include "callbacks.h" |
| 12 | |
| 13 | /* default implementations */ |
| 14 | static int __attribute__ ((format(printf, 2, 3))) |
| 15 | default_selinux_log(int type __attribute__((unused)), const char *fmt, ...) |
| 16 | { |
| 17 | int rc; |
| 18 | va_list ap; |
| 19 | va_start(ap, fmt); |
| 20 | rc = vfprintf(stderr, fmt, ap); |
| 21 | va_end(ap); |
| 22 | return rc; |
| 23 | } |
| 24 | |
| 25 | static int |
| 26 | default_selinux_audit(void *ptr __attribute__((unused)), |
| 27 | security_class_t cls __attribute__((unused)), |
| 28 | char *buf __attribute__((unused)), |
| 29 | size_t len __attribute__((unused))) |
| 30 | { |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | static int |
Stephen Smalley | ab40ea9 | 2014-02-19 09:16:17 -0500 | [diff] [blame] | 35 | default_selinux_validate(char **ctx) |
Stephen Smalley | f074036 | 2012-01-04 12:30:47 -0500 | [diff] [blame] | 36 | { |
| 37 | return security_check_context(*ctx); |
| 38 | } |
| 39 | |
| 40 | static int |
| 41 | default_selinux_setenforce(int enforcing __attribute__((unused))) |
| 42 | { |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int |
| 47 | default_selinux_policyload(int seqno __attribute__((unused))) |
| 48 | { |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | /* callback pointers */ |
| 53 | int __attribute__ ((format(printf, 2, 3))) |
| 54 | (*selinux_log)(int, const char *, ...) = |
| 55 | default_selinux_log; |
| 56 | |
| 57 | int |
| 58 | (*selinux_audit) (void *, security_class_t, char *, size_t) = |
| 59 | default_selinux_audit; |
| 60 | |
| 61 | int |
Stephen Smalley | ab40ea9 | 2014-02-19 09:16:17 -0500 | [diff] [blame] | 62 | (*selinux_validate)(char **ctx) = |
Stephen Smalley | f074036 | 2012-01-04 12:30:47 -0500 | [diff] [blame] | 63 | default_selinux_validate; |
| 64 | |
| 65 | int |
| 66 | (*selinux_netlink_setenforce) (int enforcing) = |
| 67 | default_selinux_setenforce; |
| 68 | |
| 69 | int |
| 70 | (*selinux_netlink_policyload) (int seqno) = |
| 71 | default_selinux_policyload; |
| 72 | |
| 73 | /* callback setting function */ |
| 74 | void |
| 75 | selinux_set_callback(int type, union selinux_callback cb) |
| 76 | { |
| 77 | switch (type) { |
| 78 | case SELINUX_CB_LOG: |
| 79 | selinux_log = cb.func_log; |
| 80 | break; |
| 81 | case SELINUX_CB_AUDIT: |
| 82 | selinux_audit = cb.func_audit; |
| 83 | break; |
| 84 | case SELINUX_CB_VALIDATE: |
| 85 | selinux_validate = cb.func_validate; |
| 86 | break; |
| 87 | case SELINUX_CB_SETENFORCE: |
| 88 | selinux_netlink_setenforce = cb.func_setenforce; |
| 89 | break; |
| 90 | case SELINUX_CB_POLICYLOAD: |
| 91 | selinux_netlink_policyload = cb.func_policyload; |
| 92 | break; |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | /* callback getting function */ |
| 97 | union selinux_callback |
| 98 | selinux_get_callback(int type) |
| 99 | { |
| 100 | union selinux_callback cb; |
| 101 | |
| 102 | switch (type) { |
| 103 | case SELINUX_CB_LOG: |
| 104 | cb.func_log = selinux_log; |
| 105 | break; |
| 106 | case SELINUX_CB_AUDIT: |
| 107 | cb.func_audit = selinux_audit; |
| 108 | break; |
| 109 | case SELINUX_CB_VALIDATE: |
| 110 | cb.func_validate = selinux_validate; |
| 111 | break; |
| 112 | case SELINUX_CB_SETENFORCE: |
| 113 | cb.func_setenforce = selinux_netlink_setenforce; |
| 114 | break; |
| 115 | case SELINUX_CB_POLICYLOAD: |
| 116 | cb.func_policyload = selinux_netlink_policyload; |
| 117 | break; |
| 118 | default: |
| 119 | memset(&cb, 0, sizeof(cb)); |
| 120 | errno = EINVAL; |
| 121 | break; |
| 122 | } |
| 123 | return cb; |
| 124 | } |