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#include "libosfp.h"
#include "libosfp_fingerprint.h"
#include "libosfp_score_db.h"
#include "libosfp_log.h"
const char *libosfp_result_likely_os_class_name_get(libosfp_result_t *result)
{
libosfp_os_class_id_t os_class;
if (result == NULL) {
return NULL;
}
os_class = result->score.likely_os_class;
if (os_class < 0 || os_class >= LIBOSFP_OS_CLASS_MAX) {
return NULL;
}
return libosfp_os_class_id_to_name(os_class);
}
int libosfp_result_to_buf(libosfp_result_t *result, char *strbuf, unsigned int buf_len)
{
int ret, offset = 0, i;
libosfp_os_class_id_t likely_os_class;
if (result == NULL || strbuf == NULL || buf_len == 0) {
return 0;
}
likely_os_class = result->score.likely_os_class;
if (likely_os_class < 0 || likely_os_class >= LIBOSFP_OS_CLASS_MAX) {
return 0;
}
LIBOSFP_WRITE_STRING_TO_BUF(ret, strbuf, buf_len, offset,
"Most likely os class: %s\nLikely score: %u/100\n",
libosfp_os_class_id_to_name(likely_os_class), result->score.likely_score);
for (i = 0; i < LIBOSFP_OS_CLASS_MAX; i++) {
LIBOSFP_WRITE_STRING_TO_BUF(ret, strbuf, buf_len, offset,"%s score: %u\n",
libosfp_os_class_id_to_name(i), result->score.os_class_score[i]);
}
exit:
return offset;
}
libosfp_error_code_t libosfp_detect(libosfp_context_t *libosfp_context, unsigned int flags, unsigned char *ip_hdr, unsigned char *tcp_hdr, libosfp_result_t *result)
{
int ret = LIBOSFP_EINVAL;
libosfp_fingerprint_t fp;
if (libosfp_context == NULL || ip_hdr == NULL || tcp_hdr == NULL || result == NULL) {
goto exit;
}
ret = libosfp_fingerprinting(ip_hdr, tcp_hdr, &fp);
if (ret != 0) {
goto exit;
}
ret = libosfp_score_db_score(libosfp_context->score_db, flags, &fp, &result->score);
if (ret != 0) {
goto exit;
}
return LIBOSFP_NOERR;
exit:
return ret;
}
libosfp_error_code_t libosfp_context_setup(libosfp_context_t *libosfp_context)
{
int ret = LIBOSFP_EINVAL;
if (libosfp_context == NULL) {
goto exit;
}
ret = libosfp_score_db_load((libosfp_score_db_t *)libosfp_context->score_db, libosfp_context->fp_file);
if (ret != LIBOSFP_NOERR) {
goto exit;
}
return LIBOSFP_NOERR;
exit:
return ret;
}
libosfp_context_t *libosfp_context_create(char *fp_file)
{
libosfp_context_t *libosfp_context;
libosfp_context = calloc(1, sizeof(libosfp_context_t));
if (libosfp_context == NULL) {
goto exit;
}
if (fp_file != NULL) {
if (0 != access(fp_file, R_OK)) {
goto exit;
}
libosfp_context->fp_file = strdup((const char*)fp_file);
if (libosfp_context->fp_file == NULL) {
goto exit;
}
}
libosfp_context->score_db = (void *)libosfp_score_db_create();
if (libosfp_context->score_db == NULL) {
goto exit;
}
return libosfp_context;
exit:
if (libosfp_context) {
libosfp_context_destroy(libosfp_context);
}
return NULL;
}
void libosfp_context_destroy(libosfp_context_t *libosfp_context)
{
if (libosfp_context) {
if (libosfp_context->fp_file) {
free(libosfp_context->fp_file);
}
if (libosfp_context->score_db) {
libosfp_score_db_destroy(libosfp_context->score_db);
}
free(libosfp_context);
}
}
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