* wpa_supplicant/hostapd / common helper functions, etc.
* Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
*/
#include "includes.h"
+#include "common/ieee802_11_defs.h"
#include "common.h"
}
-static int hex2byte(const char *hex)
+int hex2byte(const char *hex)
{
int a, b;
a = hex2num(*hex++);
}
+static const char * hwaddr_parse(const char *txt, u8 *addr)
+{
+ size_t i;
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ int a;
+
+ a = hex2byte(txt);
+ if (a < 0)
+ return NULL;
+ txt += 2;
+ addr[i] = a;
+ if (i < ETH_ALEN - 1 && *txt++ != ':')
+ return NULL;
+ }
+ return txt;
+}
+
+
/**
* hwaddr_aton - Convert ASCII string to MAC address (colon-delimited format)
* @txt: MAC address as a string (e.g., "00:11:22:33:44:55")
*/
int hwaddr_aton(const char *txt, u8 *addr)
{
+ return hwaddr_parse(txt, addr) ? 0 : -1;
+}
+
+
+/**
+ * hwaddr_masked_aton - Convert ASCII string with optional mask to MAC address (colon-delimited format)
+ * @txt: MAC address with optional mask as a string (e.g., "00:11:22:33:44:55/ff:ff:ff:ff:00:00")
+ * @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
+ * @mask: Buffer for the MAC address mask (ETH_ALEN = 6 bytes)
+ * @maskable: Flag to indicate whether a mask is allowed
+ * Returns: 0 on success, -1 on failure (e.g., string not a MAC address)
+ */
+int hwaddr_masked_aton(const char *txt, u8 *addr, u8 *mask, u8 maskable)
+{
+ const char *r;
+
+ /* parse address part */
+ r = hwaddr_parse(txt, addr);
+ if (!r)
+ return -1;
+
+ /* check for optional mask */
+ if (*r == '\0' || isspace(*r)) {
+ /* no mask specified, assume default */
+ os_memset(mask, 0xff, ETH_ALEN);
+ } else if (maskable && *r == '/') {
+ /* mask specified and allowed */
+ r = hwaddr_parse(r + 1, mask);
+ /* parser error? */
+ if (!r)
+ return -1;
+ } else {
+ /* mask specified but not allowed or trailing garbage */
+ return -1;
+ }
+
+ return 0;
+}
+
+
+/**
+ * hwaddr_compact_aton - Convert ASCII string to MAC address (no colon delimitors format)
+ * @txt: MAC address as a string (e.g., "001122334455")
+ * @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
+ * Returns: 0 on success, -1 on failure (e.g., string not a MAC address)
+ */
+int hwaddr_compact_aton(const char *txt, u8 *addr)
+{
int i;
for (i = 0; i < 6; i++) {
if (b < 0)
return -1;
*addr++ = (a << 4) | b;
- if (i < 5 && *txt++ != ':')
- return -1;
}
return 0;
}
-
/**
* hwaddr_aton2 - Convert ASCII string to MAC address (in any known format)
* @txt: MAC address as a string (e.g., 00:11:22:33:44:55 or 0011.2233.4455)
}
+int hwaddr_mask_txt(char *buf, size_t len, const u8 *addr, const u8 *mask)
+{
+ size_t i;
+ int print_mask = 0;
+ int res;
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ if (mask[i] != 0xff) {
+ print_mask = 1;
+ break;
+ }
+ }
+
+ if (print_mask)
+ res = os_snprintf(buf, len, MACSTR "/" MACSTR,
+ MAC2STR(addr), MAC2STR(mask));
+ else
+ res = os_snprintf(buf, len, MACSTR, MAC2STR(addr));
+ if (os_snprintf_error(len, res))
+ return -1;
+ return res;
+}
+
+
/**
* inc_byte_array - Increment arbitrary length byte array by one
* @counter: Pointer to byte array
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;
+}
+
+
+int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
+ char sep)
+{
+ size_t i;
+ char *pos = buf, *end = buf + buf_size;
+ int ret;
+
+ if (buf_size == 0)
+ return 0;
+
+ for (i = 0; i < len; i++) {
+ ret = os_snprintf(pos, end - pos, "%02x%c",
+ data[i], sep);
+ if (os_snprintf_error(end - pos, ret)) {
+ end[-1] = '\0';
+ return pos - buf;
+ }
+ pos += ret;
+ }
+ pos[-1] = '\0';
+ return pos - buf;
+}
+
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;
}
#endif /* CONFIG_NATIVE_WINDOWS */
+void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len)
+{
+ char *end = txt + maxlen;
+ size_t i;
+
+ for (i = 0; i < len; i++) {
+ if (txt + 4 >= end)
+ break;
+
+ switch (data[i]) {
+ case '\"':
+ *txt++ = '\\';
+ *txt++ = '\"';
+ break;
+ case '\\':
+ *txt++ = '\\';
+ *txt++ = '\\';
+ break;
+ case '\033':
+ *txt++ = '\\';
+ *txt++ = 'e';
+ break;
+ case '\n':
+ *txt++ = '\\';
+ *txt++ = 'n';
+ break;
+ case '\r':
+ *txt++ = '\\';
+ *txt++ = 'r';
+ break;
+ case '\t':
+ *txt++ = '\\';
+ *txt++ = 't';
+ break;
+ default:
+ if (data[i] >= 32 && data[i] <= 127) {
+ *txt++ = data[i];
+ } else {
+ txt += os_snprintf(txt, end - txt, "\\x%02x",
+ data[i]);
+ }
+ break;
+ }
+ }
+
+ *txt = '\0';
+}
+
+
+size_t printf_decode(u8 *buf, size_t maxlen, const char *str)
+{
+ const char *pos = str;
+ size_t len = 0;
+ int val;
+
+ while (*pos) {
+ if (len + 1 >= maxlen)
+ break;
+ switch (*pos) {
+ case '\\':
+ pos++;
+ switch (*pos) {
+ case '\\':
+ buf[len++] = '\\';
+ pos++;
+ break;
+ case '"':
+ buf[len++] = '"';
+ pos++;
+ break;
+ case 'n':
+ buf[len++] = '\n';
+ pos++;
+ break;
+ case 'r':
+ buf[len++] = '\r';
+ pos++;
+ break;
+ case 't':
+ buf[len++] = '\t';
+ pos++;
+ break;
+ case 'e':
+ buf[len++] = '\033';
+ pos++;
+ break;
+ case 'x':
+ pos++;
+ val = hex2byte(pos);
+ if (val < 0) {
+ val = hex2num(*pos);
+ if (val < 0)
+ break;
+ buf[len++] = val;
+ pos++;
+ } else {
+ buf[len++] = val;
+ pos += 2;
+ }
+ break;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ val = *pos++ - '0';
+ if (*pos >= '0' && *pos <= '7')
+ val = val * 8 + (*pos++ - '0');
+ if (*pos >= '0' && *pos <= '7')
+ val = val * 8 + (*pos++ - '0');
+ buf[len++] = val;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ buf[len++] = *pos++;
+ break;
+ }
+ }
+ if (maxlen > len)
+ buf[len] = '\0';
+
+ return len;
+}
+
+
/**
* wpa_ssid_txt - Convert SSID to a printable string
* @ssid: SSID (32-octet string)
*/
const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len)
{
- static char ssid_txt[33];
- char *pos;
+ static char ssid_txt[SSID_MAX_LEN * 4 + 1];
- if (ssid_len > 32)
- ssid_len = 32;
- os_memcpy(ssid_txt, ssid, ssid_len);
- ssid_txt[ssid_len] = '\0';
- for (pos = ssid_txt; *pos != '\0'; pos++) {
- if ((u8) *pos < 32 || (u8) *pos >= 127)
- *pos = '_';
+ if (ssid == NULL) {
+ ssid_txt[0] = '\0';
+ return ssid_txt;
}
+
+ printf_encode(ssid_txt, sizeof(ssid_txt), ssid, ssid_len);
return ssid_txt;
}
{
return foo;
}
+
+
+char * wpa_config_parse_string(const char *value, size_t *len)
+{
+ if (*value == '"') {
+ const char *pos;
+ char *str;
+ value++;
+ pos = os_strrchr(value, '"');
+ if (pos == NULL || pos[1] != '\0')
+ return NULL;
+ *len = pos - value;
+ str = dup_binstr(value, *len);
+ if (str == NULL)
+ return NULL;
+ return str;
+ } else if (*value == 'P' && value[1] == '"') {
+ const char *pos;
+ char *tstr, *str;
+ size_t tlen;
+ value += 2;
+ pos = os_strrchr(value, '"');
+ if (pos == NULL || pos[1] != '\0')
+ return NULL;
+ tlen = pos - value;
+ tstr = dup_binstr(value, tlen);
+ if (tstr == NULL)
+ return NULL;
+
+ str = os_malloc(tlen + 1);
+ if (str == NULL) {
+ os_free(tstr);
+ return NULL;
+ }
+
+ *len = printf_decode((u8 *) str, tlen + 1, tstr);
+ os_free(tstr);
+
+ return str;
+ } else {
+ u8 *str;
+ size_t tlen, hlen = os_strlen(value);
+ if (hlen & 1)
+ return NULL;
+ tlen = hlen / 2;
+ str = os_malloc(tlen + 1);
+ if (str == NULL)
+ return NULL;
+ if (hexstr2bin(value, str, tlen)) {
+ os_free(str);
+ return NULL;
+ }
+ str[tlen] = '\0';
+ *len = tlen;
+ return (char *) str;
+ }
+}
+
+
+int is_hex(const u8 *data, size_t len)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++) {
+ if (data[i] < 32 || data[i] >= 127)
+ return 1;
+ }
+ return 0;
+}
+
+
+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 (os_snprintf_error(end - pos, res)) {
+ 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;
+}
+
+
+/**
+ * cstr_token - Get next token from const char string
+ * @str: a constant string to tokenize
+ * @delim: a string of delimiters
+ * @last: a pointer to a character following the returned token
+ * It has to be set to NULL for the first call and passed for any
+ * futher call.
+ * Returns: a pointer to token position in str or NULL
+ *
+ * This function is similar to str_token, but it can be used with both
+ * char and const char strings. Differences:
+ * - The str buffer remains unmodified
+ * - The returned token is not a NULL terminated string, but a token
+ * position in str buffer. If a return value is not NULL a size
+ * of the returned token could be calculated as (last - token).
+ */
+const char * cstr_token(const char *str, const char *delim, const char **last)
+{
+ const char *end, *token = str;
+
+ if (!str || !delim || !last)
+ return NULL;
+
+ if (*last)
+ token = *last;
+
+ while (*token && os_strchr(delim, *token))
+ token++;
+
+ if (!*token)
+ return NULL;
+
+ end = token + 1;
+
+ while (*end && !os_strchr(delim, *end))
+ end++;
+
+ *last = end;
+ return token;
+}
+
+
+/**
+ * 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 *token = (char *) cstr_token(str, delim, (const char **) context);
+
+ if (token && **context)
+ *(*context)++ = '\0';
+
+ return token;
+}
+
+
+size_t utf8_unescape(const char *inp, size_t in_size,
+ char *outp, size_t out_size)
+{
+ size_t res_size = 0;
+
+ if (!inp || !outp)
+ return 0;
+
+ if (!in_size)
+ in_size = os_strlen(inp);
+
+ /* Advance past leading single quote */
+ if (*inp == '\'' && in_size) {
+ inp++;
+ in_size--;
+ }
+
+ while (in_size--) {
+ if (res_size >= out_size)
+ return 0;
+
+ switch (*inp) {
+ case '\'':
+ /* Terminate on bare single quote */
+ *outp = '\0';
+ return res_size;
+
+ case '\\':
+ if (!in_size--)
+ return 0;
+ inp++;
+ /* fall through */
+
+ default:
+ *outp++ = *inp++;
+ res_size++;
+ }
+ }
+
+ /* NUL terminate if space allows */
+ if (res_size < out_size)
+ *outp = '\0';
+
+ return res_size;
+}
+
+
+size_t utf8_escape(const char *inp, size_t in_size,
+ char *outp, size_t out_size)
+{
+ size_t res_size = 0;
+
+ if (!inp || !outp)
+ return 0;
+
+ /* inp may or may not be NUL terminated, but must be if 0 size
+ * is specified */
+ if (!in_size)
+ in_size = os_strlen(inp);
+
+ while (in_size--) {
+ if (res_size++ >= out_size)
+ return 0;
+
+ switch (*inp) {
+ case '\\':
+ case '\'':
+ if (res_size++ >= out_size)
+ return 0;
+ *outp++ = '\\';
+ /* fall through */
+
+ default:
+ *outp++ = *inp++;
+ break;
+ }
+ }
+
+ /* NUL terminate if space allows */
+ if (res_size < out_size)
+ *outp = '\0';
+
+ return res_size;
+}
+
+
+int is_ctrl_char(char c)
+{
+ return c > 0 && c < 32;
+}
projects / mech_eap.git / blobdiff