#include <unistd.h>

#include <sys/types.h>

#include <fcntl.h>

#include <stdlib.h>

#include <stdio.h>

#include <errno.h>

#include <string.h>

#include <asm/page.h>

#include "selinux_internal.h"

#include "policy.h"

#include <limits.h>

int security_compute_av_raw(security_context_t scon,

                            security_context_t tcon,

                            security_class_t tclass,

                            access_vector_t requested,

                            struct av_decision *avd)

{

	char path[PATH_MAX];

	char *buf;

	size_t len;

	int fd, ret;

	snprintf(path, sizeof path, "%s/access", selinux_mnt);

	fd = open(path, O_RDWR);

	if (fd < 0) 

		return -1;

	len = PAGE_SIZE;

	buf = malloc(len);

	if (!buf) {

		ret = -1;

		goto out;

	}

	snprintf(buf, len, "%s %s %hu %x", scon, tcon, tclass, requested);

	ret = write(fd, buf, strlen(buf));

	if (ret < 0)

		goto out2;

	memset(buf, 0, len);

	ret = read(fd, buf, len-1);

	if (ret < 0)

		goto out2;

	if (sscanf(buf, "%x %x %x %x %u", &avd->allowed, 

		    &avd->decided, &avd->auditallow, &avd->auditdeny, 

		   &avd->seqno) != 5) {

		ret = -1;

		goto out2;

	}

	ret = 0;

out2:

	free(buf);

out:

	close(fd);

	return ret;

}

hidden_def(security_compute_av_raw)

int security_compute_av(security_context_t scon,

                        security_context_t tcon,

                        security_class_t tclass,

                        access_vector_t requested,

                        struct av_decision *avd)

{

	int ret;

	security_context_t rscon = scon;

	security_context_t rtcon = tcon;

	if (context_translations) {

		if (trans_to_raw_context(scon, &rscon))

			return -1;

		if (trans_to_raw_context(tcon, &rtcon)) {

			freecon(rscon);

			return -1;

		}

	}

 	ret = security_compute_av_raw(rscon, rtcon, tclass, requested, avd);

	if (context_translations) {

		freecon(rscon);

		freecon(rtcon);

	}

	return ret;

}

hidden_def(security_compute_av)