CIPSO is the Common IP Security Option, an IETF standard for setting
security levels for a process sending packets. In Smack kernels,
CIPSO headers are mapped to Smack labels automatically, but can be changed.
This patch writes label/category mappings from /etc/smack/cipso/ to
/sys/fs/smackfs/cipso2. The mapping format is "%s%4d%4d"["%4d"]...
For more information about Smack and CIPSO, see:
https://kernel.org/doc/Documentation/security/Smack.txt
#include "label.h"
#define SMACK_CONFIG "/etc/smack/accesses.d/"
#include "label.h"
#define SMACK_CONFIG "/etc/smack/accesses.d/"
+#define CIPSO_CONFIG "/etc/smack/cipso/"
static int write_rules(const char* dstpath, const char* srcdir) {
_cleanup_fclose_ FILE *dst = NULL;
static int write_rules(const char* dstpath, const char* srcdir) {
_cleanup_fclose_ FILE *dst = NULL;
return 0;
case 0:
log_info("Successfully loaded Smack policies.");
return 0;
case 0:
log_info("Successfully loaded Smack policies.");
+ break;
+ default:
+ log_warning("Failed to load Smack access rules: %s, ignoring.",
+ strerror(abs(r)));
+ return 0;
+ }
+
+ r = write_rules("/sys/fs/smackfs/cipso2", CIPSO_CONFIG);
+ switch(r) {
+ case -ENOENT:
+ log_debug("Smack/CIPSO is not enabled in the kernel.");
+ return 0;
+ case ENOENT:
+ log_debug("Smack/CIPSO access rules directory " CIPSO_CONFIG " not found");
+ return 0;
+ case 0:
+ log_info("Successfully loaded Smack/CIPSO policies.");
- log_warning("Failed to load smack access rules: %s, ignoring.",
+ log_warning("Failed to load Smack/CIPSO access rules: %s, ignoring.",
strerror(abs(r)));
return 0;
}
strerror(abs(r)));
return 0;
}