os_memcpy(buf + 4, (u8 *) &tmp, 4);
}
+/**
+ * wpa_scnprintf - Simpler-to-use snprintf function
+ * @buf: Output buffer
+ * @size: Buffer size
+ * @fmt: format
+ *
+ * Simpler snprintf version that doesn't require further error checks - the
+ * return value only indicates how many bytes were actually written, excluding
+ * the NULL byte (i.e., 0 on error, size-1 if buffer is not big enough).
+ */
+int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ if (!size)
+ return 0;
+
+ va_start(ap, fmt);
+ ret = vsnprintf(buf, size, fmt, ap);
+ va_end(ap);
+
+ if (ret < 0)
+ return 0;
+ if ((size_t) ret >= size)
+ return size - 1;
+
+ return ret;
+}
static inline int _wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data,
size_t len, int uppercase)
for (i = 0; i < len; i++) {
ret = os_snprintf(pos, end - pos, uppercase ? "%02X" : "%02x",
data[i]);
- if (ret < 0 || ret >= end - pos) {
+ if (os_snprintf_error(end - pos, ret)) {
end[-1] = '\0';
return pos - buf;
}
size_t i;
for (i = 0; i < len; i++) {
- if (txt + 4 > end)
+ if (txt + 4 >= end)
break;
switch (data[i]) {
*txt++ = '\\';
*txt++ = '\\';
break;
- case '\e':
+ case '\033':
*txt++ = '\\';
*txt++ = 'e';
break;
int val;
while (*pos) {
- if (len == maxlen)
+ if (len + 1 >= maxlen)
break;
switch (*pos) {
case '\\':
pos++;
break;
case 'e':
- buf[len++] = '\e';
+ buf[len++] = '\033';
pos++;
break;
case 'x':
break;
}
}
+ if (maxlen > len)
+ buf[len] = '\0';
return len;
}
if (pos == NULL || pos[1] != '\0')
return NULL;
*len = pos - value;
- str = os_malloc(*len + 1);
+ str = dup_binstr(value, *len);
if (str == NULL)
return NULL;
- os_memcpy(str, value, *len);
- str[*len] = '\0';
return str;
} else if (*value == 'P' && value[1] == '"') {
const char *pos;
if (pos == NULL || pos[1] != '\0')
return NULL;
tlen = pos - value;
- tstr = os_malloc(tlen + 1);
+ tstr = dup_binstr(value, tlen);
if (tstr == NULL)
return NULL;
- os_memcpy(tstr, value, tlen);
- tstr[tlen] = '\0';
str = os_malloc(tlen + 1);
if (str == NULL) {
}
return 0;
}
+
+
+int find_first_bit(u32 value)
+{
+ int pos = 0;
+
+ while (value) {
+ if (value & 0x1)
+ return pos;
+ value >>= 1;
+ pos++;
+ }
+
+ return -1;
+}
+
+
+size_t merge_byte_arrays(u8 *res, size_t res_len,
+ const u8 *src1, size_t src1_len,
+ const u8 *src2, size_t src2_len)
+{
+ size_t len = 0;
+
+ os_memset(res, 0, res_len);
+
+ if (src1) {
+ if (src1_len >= res_len) {
+ os_memcpy(res, src1, res_len);
+ return res_len;
+ }
+
+ os_memcpy(res, src1, src1_len);
+ len += src1_len;
+ }
+
+ if (src2) {
+ if (len + src2_len >= res_len) {
+ os_memcpy(res + len, src2, res_len - len);
+ return res_len;
+ }
+
+ os_memcpy(res + len, src2, src2_len);
+ len += src2_len;
+ }
+
+ return len;
+}
+
+
+char * dup_binstr(const void *src, size_t len)
+{
+ char *res;
+
+ if (src == NULL)
+ return NULL;
+ res = os_malloc(len + 1);
+ if (res == NULL)
+ return NULL;
+ os_memcpy(res, src, len);
+ res[len] = '\0';
+
+ return res;
+}
+
+
+int freq_range_list_parse(struct wpa_freq_range_list *res, const char *value)
+{
+ struct wpa_freq_range *freq = NULL, *n;
+ unsigned int count = 0;
+ const char *pos, *pos2, *pos3;
+
+ /*
+ * Comma separated list of frequency ranges.
+ * For example: 2412-2432,2462,5000-6000
+ */
+ pos = value;
+ while (pos && pos[0]) {
+ n = os_realloc_array(freq, count + 1,
+ sizeof(struct wpa_freq_range));
+ if (n == NULL) {
+ os_free(freq);
+ return -1;
+ }
+ freq = n;
+ freq[count].min = atoi(pos);
+ pos2 = os_strchr(pos, '-');
+ pos3 = os_strchr(pos, ',');
+ if (pos2 && (!pos3 || pos2 < pos3)) {
+ pos2++;
+ freq[count].max = atoi(pos2);
+ } else
+ freq[count].max = freq[count].min;
+ pos = pos3;
+ if (pos)
+ pos++;
+ count++;
+ }
+
+ os_free(res->range);
+ res->range = freq;
+ res->num = count;
+
+ return 0;
+}
+
+
+int freq_range_list_includes(const struct wpa_freq_range_list *list,
+ unsigned int freq)
+{
+ unsigned int i;
+
+ if (list == NULL)
+ return 0;
+
+ for (i = 0; i < list->num; i++) {
+ if (freq >= list->range[i].min && freq <= list->range[i].max)
+ return 1;
+ }
+
+ return 0;
+}
+
+
+char * freq_range_list_str(const struct wpa_freq_range_list *list)
+{
+ char *buf, *pos, *end;
+ size_t maxlen;
+ unsigned int i;
+ int res;
+
+ if (list->num == 0)
+ return NULL;
+
+ maxlen = list->num * 30;
+ buf = os_malloc(maxlen);
+ if (buf == NULL)
+ return NULL;
+ pos = buf;
+ end = buf + maxlen;
+
+ for (i = 0; i < list->num; i++) {
+ struct wpa_freq_range *range = &list->range[i];
+
+ if (range->min == range->max)
+ res = os_snprintf(pos, end - pos, "%s%u",
+ i == 0 ? "" : ",", range->min);
+ else
+ res = os_snprintf(pos, end - pos, "%s%u-%u",
+ i == 0 ? "" : ",",
+ range->min, range->max);
+ if (res < 0 || res > end - pos) {
+ os_free(buf);
+ return NULL;
+ }
+ pos += res;
+ }
+
+ return buf;
+}
+
+
+int int_array_len(const int *a)
+{
+ int i;
+ for (i = 0; a && a[i]; i++)
+ ;
+ return i;
+}
+
+
+void int_array_concat(int **res, const int *a)
+{
+ int reslen, alen, i;
+ int *n;
+
+ reslen = int_array_len(*res);
+ alen = int_array_len(a);
+
+ n = os_realloc_array(*res, reslen + alen + 1, sizeof(int));
+ if (n == NULL) {
+ os_free(*res);
+ *res = NULL;
+ return;
+ }
+ for (i = 0; i <= alen; i++)
+ n[reslen + i] = a[i];
+ *res = n;
+}
+
+
+static int freq_cmp(const void *a, const void *b)
+{
+ int _a = *(int *) a;
+ int _b = *(int *) b;
+
+ if (_a == 0)
+ return 1;
+ if (_b == 0)
+ return -1;
+ return _a - _b;
+}
+
+
+void int_array_sort_unique(int *a)
+{
+ int alen;
+ int i, j;
+
+ if (a == NULL)
+ return;
+
+ alen = int_array_len(a);
+ qsort(a, alen, sizeof(int), freq_cmp);
+
+ i = 0;
+ j = 1;
+ while (a[i] && a[j]) {
+ if (a[i] == a[j]) {
+ j++;
+ continue;
+ }
+ a[++i] = a[j++];
+ }
+ if (a[i])
+ i++;
+ a[i] = 0;
+}
+
+
+void int_array_add_unique(int **res, int a)
+{
+ int reslen;
+ int *n;
+
+ for (reslen = 0; *res && (*res)[reslen]; reslen++) {
+ if ((*res)[reslen] == a)
+ return; /* already in the list */
+ }
+
+ n = os_realloc_array(*res, reslen + 2, sizeof(int));
+ if (n == NULL) {
+ os_free(*res);
+ *res = NULL;
+ return;
+ }
+
+ n[reslen] = a;
+ n[reslen + 1] = 0;
+
+ *res = n;
+}
+
+
+void str_clear_free(char *str)
+{
+ if (str) {
+ size_t len = os_strlen(str);
+ os_memset(str, 0, len);
+ os_free(str);
+ }
+}
+
+
+void bin_clear_free(void *bin, size_t len)
+{
+ if (bin) {
+ os_memset(bin, 0, len);
+ os_free(bin);
+ }
+}
+
+
+int random_mac_addr(u8 *addr)
+{
+ if (os_get_random(addr, ETH_ALEN) < 0)
+ return -1;
+ addr[0] &= 0xfe; /* unicast */
+ addr[0] |= 0x02; /* locally administered */
+ return 0;
+}
+
+
+int random_mac_addr_keep_oui(u8 *addr)
+{
+ if (os_get_random(addr + 3, 3) < 0)
+ return -1;
+ addr[0] &= 0xfe; /* unicast */
+ addr[0] |= 0x02; /* locally administered */
+ return 0;
+}
+
+
+/**
+ * str_token - Get next token from a string
+ * @buf: String to tokenize. Note that the string might be modified.
+ * @delim: String of delimiters
+ * @context: Pointer to save our context. Should be initialized with
+ * NULL on the first call, and passed for any further call.
+ * Returns: The next token, NULL if there are no more valid tokens.
+ */
+char * str_token(char *str, const char *delim, char **context)
+{
+ char *end, *pos = str;
+
+ if (*context)
+ pos = *context;
+
+ while (*pos && os_strchr(delim, *pos))
+ pos++;
+ if (!*pos)
+ return NULL;
+
+ end = pos + 1;
+ while (*end && !os_strchr(delim, *end))
+ end++;
+
+ if (*end)
+ *end++ = '\0';
+
+ *context = end;
+ return pos;
+}
projects / mech_eap.git / blobdiff