43 lines
900 B
C
43 lines
900 B
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <sys/time.h>
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#include "blacklist.h"
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#include "global.h"
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static struct blacklist_entry_t blacklist[BLACKLIST_ENTRY_COUNT];
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static double gettime(void) {
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struct timeval tv;
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if (gettimeofday(&tv, NULL)) {
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return 0;
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}
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double now = tv.tv_sec + (tv.tv_usec * 1e-6);
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return now;
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}
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static bool blacklist_entry_expired(int index) {
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double now = gettime();
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return now > blacklist[index].entered + BLACKLIST_ENTRY_TIMEOUT_SECS;
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}
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void blacklist_ip(uint32_t ip) {
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for (int i = 0; i < BLACKLIST_ENTRY_COUNT; i++) {
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if (blacklist_entry_expired(i)) {
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blacklist[i].ip = ip;
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blacklist[i].entered = gettime();
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return;
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}
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}
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}
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bool is_ip_blacklisted(uint32_t ip) {
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for (int i = 0; i < BLACKLIST_ENTRY_COUNT; i++) {
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if ((ip == blacklist[i].ip) && (!blacklist_entry_expired(i))) {
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return true;
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}
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}
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return false;
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}
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