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https://github.com/cesanta/mongoose.git
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118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
#include "util.h"
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#if MG_ARCH == MG_ARCH_UNIX && defined(__APPLE__)
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#include <mach/mach_time.h>
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#endif
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#if MG_ENABLE_CUSTOM_RANDOM
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#else
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void mg_random(void *buf, size_t len) {
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bool done = false;
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unsigned char *p = (unsigned char *) buf;
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#if MG_ARCH == MG_ARCH_ESP32
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while (len--) *p++ = (unsigned char) (esp_random() & 255);
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done = true;
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#elif MG_ARCH == MG_ARCH_WIN32
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#elif MG_ARCH == MG_ARCH_UNIX
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FILE *fp = fopen("/dev/urandom", "rb");
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if (fp != NULL) {
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if (fread(buf, 1, len, fp) == len) done = true;
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fclose(fp);
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}
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#endif
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// If everything above did not work, fallback to a pseudo random generator
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while (!done && len--) *p++ = (unsigned char) (rand() & 255);
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}
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#endif
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uint32_t mg_ntohl(uint32_t net) {
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uint8_t data[4] = {0, 0, 0, 0};
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memcpy(&data, &net, sizeof(data));
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return (((uint32_t) data[3]) << 0) | (((uint32_t) data[2]) << 8) |
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(((uint32_t) data[1]) << 16) | (((uint32_t) data[0]) << 24);
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}
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uint16_t mg_ntohs(uint16_t net) {
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uint8_t data[2] = {0, 0};
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memcpy(&data, &net, sizeof(data));
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return (uint16_t) ((uint16_t) data[1] | (((uint16_t) data[0]) << 8));
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}
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uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len) {
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int i;
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crc = ~crc;
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while (len--) {
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crc ^= *(unsigned char *) buf++;
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for (i = 0; i < 8; i++) crc = crc & 1 ? (crc >> 1) ^ 0xedb88320 : crc >> 1;
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}
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return ~crc;
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}
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static int isbyte(int n) {
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return n >= 0 && n <= 255;
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}
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static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
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int n, a, b, c, d, slash = 32, len = 0;
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if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
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sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
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isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && slash >= 0 &&
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slash < 33) {
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len = n;
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*net = ((uint32_t) a << 24) | ((uint32_t) b << 16) | ((uint32_t) c << 8) |
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(uint32_t) d;
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*mask = slash ? (uint32_t) (0xffffffffU << (32 - slash)) : (uint32_t) 0;
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}
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return len;
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}
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int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip) {
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struct mg_str k, v;
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int allowed = acl.len == 0 ? '+' : '-'; // If any ACL is set, deny by default
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while (mg_commalist(&acl, &k, &v)) {
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uint32_t net, mask;
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if (k.ptr[0] != '+' && k.ptr[0] != '-') return -1;
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if (parse_net(&k.ptr[1], &net, &mask) == 0) return -2;
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if ((mg_ntohl(remote_ip) & mask) == net) allowed = k.ptr[0];
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}
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return allowed == '+';
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}
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#if MG_ENABLE_CUSTOM_MILLIS
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#else
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uint64_t mg_millis(void) {
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#if MG_ARCH == MG_ARCH_WIN32
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return GetTickCount();
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#elif MG_ARCH == MG_ARCH_ESP32
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return esp_timer_get_time() / 1000;
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#elif MG_ARCH == MG_ARCH_ESP8266
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return xTaskGetTickCount() * portTICK_PERIOD_MS;
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#elif MG_ARCH == MG_ARCH_FREERTOS_TCP || MG_ARCH == MG_ARCH_FREERTOS_LWIP
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return xTaskGetTickCount() * portTICK_PERIOD_MS;
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#elif MG_ARCH == MG_ARCH_AZURERTOS
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return tx_time_get() * (1000 /* MS per SEC */ / TX_TIMER_TICKS_PER_SECOND);
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#elif MG_ARCH == MG_ARCH_UNIX && defined(__APPLE__)
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uint64_t ticks = mach_absolute_time();
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static mach_timebase_info_data_t timebase;
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mach_timebase_info(&timebase);
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double ticks_to_nanos = (double) timebase.numer / timebase.denom;
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uint64_t uptime_nanos = (uint64_t) (ticks_to_nanos * ticks);
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return (uint64_t) (uptime_nanos / 1000000);
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#elif MG_ARCH == MG_ARCH_UNIX
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struct timespec ts;
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#ifdef _POSIX_MONOTONIC_CLOCK
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#ifdef CLOCK_MONOTONIC_RAW
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clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
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#else
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clock_gettime(CLOCK_MONOTONIC, &ts);
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#endif
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#else
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clock_gettime(CLOCK_REALTIME, &ts);
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#endif
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return ((uint64_t) ts.tv_sec * 1000 + (uint64_t) ts.tv_nsec / 1000000);
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#else
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return (uint64_t) (time(NULL) * 1000);
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#endif
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}
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#endif
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