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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
#include "osfp_common.h"
#include "osfp.h"
#include "osfp_log.h"
unsigned int osfp_profile_enable;
const char *osfp_os_class_name[OSFP_OS_CLASS_MAX] = {
OSFP_OS_CLASS_NAME_UNKNOWN,
OSFP_OS_CLASS_NAME_WINDOWS,
OSFP_OS_CLASS_NAME_LINUX,
OSFP_OS_CLASS_NAME_MAC_OS,
OSFP_OS_CLASS_NAME_IOS,
OSFP_OS_CLASS_NAME_ANDROID,
OSFP_OS_CLASS_NAME_OTHERS
};
struct osfp_profile_counter osfp_profile_fingerprinting;
struct osfp_profile_counter osfp_profile_prefilter;
struct osfp_profile_counter osfp_profile_score;
struct osfp_profile_counter osfp_profile_result_build;
struct osfp_profile_counter osfp_profile_result_export;
const char *osfp_os_class_id_to_name(enum osfp_os_class_id os_class)
{
return osfp_os_class_name[os_class];
}
enum osfp_os_class_id osfp_os_class_name_to_id(char *name)
{
int i, namelen;
const char *os_class_name;
for (i = 0; i < OSFP_OS_CLASS_MAX; i++) {
os_class_name = osfp_os_class_id_to_name(i);
if (0 == strncmp(name, os_class_name, strlen(os_class_name))) {
return (enum osfp_os_class_id)i;
}
}
return OSFP_OS_CLASS_MAX;
}
struct osfp_result *osfp_result_build(struct osfp_os_class_score *os_class_score, const char *matched)
{
int i;
unsigned int tmp_score;
unsigned int likely_score;
enum osfp_os_class_id likely_os_class;
struct osfp_result *result;
result = calloc(1, sizeof(struct osfp_result));
if (result == NULL) {
goto exit;
}
likely_score = 0;
likely_os_class = OSFP_OS_CLASS_OTHERS;
// likely os score
for (i = 0; i < OSFP_OS_CLASS_MAX; i++) {
tmp_score = os_class_score->scores[i];
if (likely_score < tmp_score) {
likely_score = tmp_score;
likely_os_class = i;
}
result->details[i].score = tmp_score;
}
// prefiltered
if (likely_score == OSFP_PERCENTILE) {
goto end;
}
// too low to tell os class
if (likely_score < OSFP_LOWEST_SCORE_LIMIT) {
likely_os_class = OSFP_OS_CLASS_OTHERS;
goto end;
}
// when the tied likely scores appear between win/apple-like/unix-like, we throw unknown
for (i = 0; i < OSFP_OS_CLASS_MAX; i++) {
if (likely_os_class == i) {
continue;
}
if (likely_score != os_class_score->scores[i]) {
continue;
}
if (likely_os_class == OSFP_OS_CLASS_LINUX && i == OSFP_OS_CLASS_ANDROID) {
continue;
}
if (likely_os_class == OSFP_OS_CLASS_MAC_OS && i == OSFP_OS_CLASS_IOS) {
continue;
}
likely_os_class = OSFP_OS_CLASS_UNKNOWN;
break;
}
end:
result->likely_os_class = likely_os_class;
result->matched = matched;
return result;
exit:
return NULL;
}
void osfp_profile_counter_print(struct osfp_profile_counter *profile, const char *name)
{
printf("profile %s: avg: %lu max: %lu min: %lu curr: %lu total: %lu count: %lu\n",
name,
profile->total_cycle / profile->count,
profile->max_cycle,
profile->min_cycle,
profile->curr_cycle,
profile->total_cycle,
profile->count);
}
void osfp_profile_counter_update(struct osfp_profile_counter *profile, unsigned long long curr_cycle)
{
profile->count++;
profile->curr_cycle = curr_cycle;
profile->total_cycle += curr_cycle;
if (profile->min_cycle == 0) {
profile->min_cycle = curr_cycle;
} else {
if (profile->min_cycle > curr_cycle) {
profile->min_cycle = curr_cycle;
}
}
if (profile->max_cycle < curr_cycle) {
profile->max_cycle = curr_cycle;
}
}
void osfp_profile_print_stats(void)
{
osfp_profile_counter_print(&osfp_profile_fingerprinting, "fingerprinting");
osfp_profile_counter_print(&osfp_profile_prefilter, "prefilter");
osfp_profile_counter_print(&osfp_profile_score, "score");
osfp_profile_counter_print(&osfp_profile_result_build, "result build");
osfp_profile_counter_print(&osfp_profile_result_export, "result export");
}
void osfp_profile_set(unsigned int enabled)
{
osfp_profile_enable = enabled;
}
char *osfp_read_file(char *fp_file)
{
int ret = -1;
char *file_buffer = NULL;
unsigned int file_len = 0;
FILE *fp = NULL;
struct stat st;
if (0 > stat(fp_file, &st)) {
osfp_log_error("stat() failed on '%s'.\n", fp_file);
goto exit;
}
if (st.st_size == 0) {
osfp_log_error("Empty file: '%s'.\n", fp_file);
goto exit;
}
file_len = (unsigned int)st.st_size;
file_buffer = malloc(file_len + 1);
if (file_buffer == NULL) {
osfp_log_error("Not enough memory for file buffer. file name: '%s'\n",fp_file);
goto exit;
}
fp = fopen(fp_file, "r");
if (fp == NULL) {
osfp_log_error("Cannot open '%s' for reading.\n", fp_file);
goto exit;
}
ret = fread(file_buffer, 1, file_len, fp);
if (ret < 0) {
osfp_log_error("fread() failed on '%s'.\n", fp_file);
free(file_buffer);
fclose(fp);
goto exit;
}
fclose(fp);
file_buffer[file_len] = 0;
return file_buffer;
exit:
return NULL;
}
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