first version

src/utils/utils.c

@@ -0,0 +1,80 @@
+#include "utils.h"
+#include "ubus.h"
+
+int string_is_greater(uint8_t *str, uint8_t *str_2) {
+
+    int length_1 = strlen((char *) str);
+    int length_2 = strlen((char *) str_2);
+
+    int length = length_1 < length_2 ? length_1 : length_2;
+
+    for (int i = 0; i < length; i++) {
+        if (str[i] > str_2[i]) {
+            return 1;
+        }
+        if (str[i] < str_2[i]) {
+            return 0;
+        }
+    }
+    return length_1 > length_2;
+}
+
+// source: https://elixir.bootlin.com/linux/v4.9/source/lib/hexdump.c#L28
+int hex_to_bin(char ch) {
+    if ((ch >= '0') && (ch <= '9')) return ch - '0';
+    ch = tolower(ch);
+    if ((ch >= 'a') && (ch <= 'f')) return ch - 'a' + 10;
+    return -1;
+}
+
+// based on: hostapd src/utils/common.c
+int hwaddr_aton(const char *txt, uint8_t *addr) {
+    int i;
+
+    for (i = 0; i < ETH_ALEN; i++) {
+        int a, b;
+
+        a = hex_to_bin(*txt++);
+        if (a < 0) return -1;
+        b = hex_to_bin(*txt++);
+        if (b < 0) return -1;
+        *addr++ = (a << 4) | b;
+        if (i < 5 && *txt++ != ':') return -1;
+    }
+
+    return 0;
+}
+
+int convert_mac(char *in, char *out) {
+    int i, j = 0;
+
+    for (i = 0; i < 6; i++) {
+        if (in[j + 1] != ':' && in[j + 1] != '\0') {
+            out[3 * i] = toupper(in[j]);
+            out[(3 * i) + 1] = toupper(in[j + 1]);
+            out[(3 * i) + 2] = in[j + 2];
+            j += 3;
+        } else {
+            out[3 * i] = '0';
+            out[(3 * i) + 1] = toupper(in[j]);
+            out[(3 * i) + 2] = toupper(in[j + 1]);
+            j += 2;
+        }
+    }
+    return 0;
+}
+
+void write_mac_to_file(char *path, uint8_t addr[]) {
+    FILE *f = fopen(path, "a");
+    if (f == NULL) {
+        fprintf(stderr,"Error opening mac file!\n");
+        exit(1);
+    }
+
+    char mac_buf[20];
+    sprintf(mac_buf, MACSTR, MAC2STR(addr));
+
+    fprintf(f, "%s\n", mac_buf);
+
+    fclose(f);
+}