ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/package/kernel/asr-wl/asr-hostapd/asr-hostapd-2023-06-22/src/utils/common.c b/package/kernel/asr-wl/asr-hostapd/asr-hostapd-2023-06-22/src/utils/common.c
new file mode 100644
index 0000000..6acfcbd
--- /dev/null
+++ b/package/kernel/asr-wl/asr-hostapd/asr-hostapd-2023-06-22/src/utils/common.c
@@ -0,0 +1,1304 @@
+/*
+ * wpa_supplicant/hostapd / common helper functions, etc.
+ * Copyright (c) 2002-2019, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "includes.h"
+#include <limits.h>
+
+#include "common/ieee802_11_defs.h"
+#include "common.h"
+
+
+int hex2num(char c)
+{
+ if (c >= '0' && c <= '9')
+ return c - '0';
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+ return -1;
+}
+
+
+int hex2byte(const char *hex)
+{
+ int a, b;
+ a = hex2num(*hex++);
+ if (a < 0)
+ return -1;
+ b = hex2num(*hex++);
+ if (b < 0)
+ return -1;
+ return (a << 4) | b;
+}
+
+
+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")
+ * @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_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((unsigned char) *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++) {
+ int a, b;
+
+ a = hex2num(*txt++);
+ if (a < 0)
+ return -1;
+ b = hex2num(*txt++);
+ if (b < 0)
+ return -1;
+ *addr++ = (a << 4) | b;
+ }
+
+ 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)
+ * @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
+ * Returns: Characters used (> 0) on success, -1 on failure
+ */
+int hwaddr_aton2(const char *txt, u8 *addr)
+{
+ int i;
+ const char *pos = txt;
+
+ for (i = 0; i < 6; i++) {
+ int a, b;
+
+ while (*pos == ':' || *pos == '.' || *pos == '-')
+ pos++;
+
+ a = hex2num(*pos++);
+ if (a < 0)
+ return -1;
+ b = hex2num(*pos++);
+ if (b < 0)
+ return -1;
+ *addr++ = (a << 4) | b;
+ }
+
+ return pos - txt;
+}
+
+
+/**
+ * hexstr2bin - Convert ASCII hex string into binary data
+ * @hex: ASCII hex string (e.g., "01ab")
+ * @buf: Buffer for the binary data
+ * @len: Length of the text to convert in bytes (of buf); hex will be double
+ * this size
+ * Returns: 0 on success, -1 on failure (invalid hex string)
+ */
+int hexstr2bin(const char *hex, u8 *buf, size_t len)
+{
+ size_t i;
+ int a;
+ const char *ipos = hex;
+ u8 *opos = buf;
+
+ for (i = 0; i < len; i++) {
+ a = hex2byte(ipos);
+ if (a < 0)
+ return -1;
+ *opos++ = a;
+ ipos += 2;
+ }
+ return 0;
+}
+
+
+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
+ * @len: Length of the counter in bytes
+ *
+ * This function increments the last byte of the counter by one and continues
+ * rolling over to more significant bytes if the byte was incremented from
+ * 0xff to 0x00.
+ */
+void inc_byte_array(u8 *counter, size_t len)
+{
+ int pos = len - 1;
+ while (pos >= 0) {
+ counter[pos]++;
+ if (counter[pos] != 0)
+ break;
+ pos--;
+ }
+}
+
+
+void buf_shift_right(u8 *buf, size_t len, size_t bits)
+{
+ size_t i;
+
+ for (i = len - 1; i > 0; i--)
+ buf[i] = (buf[i - 1] << (8 - bits)) | (buf[i] >> bits);
+ buf[0] >>= bits;
+}
+
+
+void wpa_get_ntp_timestamp(u8 *buf)
+{
+ struct os_time now;
+ u32 sec, usec;
+ be32 tmp;
+
+ /* 64-bit NTP timestamp (time from 1900-01-01 00:00:00) */
+ os_get_time(&now);
+ sec = now.sec + 2208988800U; /* Epoch to 1900 */
+ /* Estimate 2^32/10^6 = 4295 - 1/32 - 1/512 */
+ usec = now.usec;
+ usec = 4295 * usec - (usec >> 5) - (usec >> 9);
+ tmp = host_to_be32(sec);
+ os_memcpy(buf, (u8 *) &tmp, 4);
+ tmp = host_to_be32(usec);
+ 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)
+{
+ 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, uppercase ? "%02X" : "%02x",
+ data[i]);
+ if (os_snprintf_error(end - pos, ret)) {
+ end[-1] = '\0';
+ return pos - buf;
+ }
+ pos += ret;
+ }
+ end[-1] = '\0';
+ return pos - buf;
+}
+
+/**
+ * wpa_snprintf_hex - Print data as a hex string into a buffer
+ * @buf: Memory area to use as the output buffer
+ * @buf_size: Maximum buffer size in bytes (should be at least 2 * len + 1)
+ * @data: Data to be printed
+ * @len: Length of data in bytes
+ * Returns: Number of bytes written
+ */
+int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len)
+{
+ return _wpa_snprintf_hex(buf, buf_size, data, len, 0);
+}
+
+
+/**
+ * wpa_snprintf_hex_uppercase - Print data as a upper case hex string into buf
+ * @buf: Memory area to use as the output buffer
+ * @buf_size: Maximum buffer size in bytes (should be at least 2 * len + 1)
+ * @data: Data to be printed
+ * @len: Length of data in bytes
+ * Returns: Number of bytes written
+ */
+int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
+ size_t len)
+{
+ return _wpa_snprintf_hex(buf, buf_size, data, len, 1);
+}
+
+
+#ifdef CONFIG_ANSI_C_EXTRA
+
+#ifdef _WIN32_WCE
+void perror(const char *s)
+{
+ wpa_printf(MSG_ERROR, "%s: GetLastError: %d",
+ s, (int) GetLastError());
+}
+#endif /* _WIN32_WCE */
+
+
+int optind = 1;
+int optopt;
+char *optarg;
+
+int getopt(int argc, char *const argv[], const char *optstring)
+{
+ static int optchr = 1;
+ char *cp;
+
+ if (optchr == 1) {
+ if (optind >= argc) {
+ /* all arguments processed */
+ return EOF;
+ }
+
+ if (argv[optind][0] != '-' || argv[optind][1] == '\0') {
+ /* no option characters */
+ return EOF;
+ }
+ }
+
+ if (os_strcmp(argv[optind], "--") == 0) {
+ /* no more options */
+ optind++;
+ return EOF;
+ }
+
+ optopt = argv[optind][optchr];
+ cp = os_strchr(optstring, optopt);
+ if (cp == NULL || optopt == ':') {
+ if (argv[optind][++optchr] == '\0') {
+ optchr = 1;
+ optind++;
+ }
+ return '?';
+ }
+
+ if (cp[1] == ':') {
+ /* Argument required */
+ optchr = 1;
+ if (argv[optind][optchr + 1]) {
+ /* No space between option and argument */
+ optarg = &argv[optind++][optchr + 1];
+ } else if (++optind >= argc) {
+ /* option requires an argument */
+ return '?';
+ } else {
+ /* Argument in the next argv */
+ optarg = argv[optind++];
+ }
+ } else {
+ /* No argument */
+ if (argv[optind][++optchr] == '\0') {
+ optchr = 1;
+ optind++;
+ }
+ optarg = NULL;
+ }
+ return *cp;
+}
+#endif /* CONFIG_ANSI_C_EXTRA */
+
+
+#ifdef CONFIG_NATIVE_WINDOWS
+/**
+ * wpa_unicode2ascii_inplace - Convert unicode string into ASCII
+ * @str: Pointer to string to convert
+ *
+ * This function converts a unicode string to ASCII using the same
+ * buffer for output. If UNICODE is not set, the buffer is not
+ * modified.
+ */
+void wpa_unicode2ascii_inplace(TCHAR *str)
+{
+#ifdef UNICODE
+ char *dst = (char *) str;
+ while (*str)
+ *dst++ = (char) *str++;
+ *dst = '\0';
+#endif /* UNICODE */
+}
+
+
+TCHAR * wpa_strdup_tchar(const char *str)
+{
+#ifdef UNICODE
+ TCHAR *buf;
+ buf = os_malloc((strlen(str) + 1) * sizeof(TCHAR));
+ if (buf == NULL)
+ return NULL;
+ wsprintf(buf, L"%S", str);
+ return buf;
+#else /* UNICODE */
+ return os_strdup(str);
+#endif /* UNICODE */
+}
+#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] <= 126) {
+ *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)
+ * @ssid_len: Length of ssid in octets
+ * Returns: Pointer to a printable string
+ *
+ * This function can be used to convert SSIDs into printable form. In most
+ * cases, SSIDs do not use unprintable characters, but IEEE 802.11 standard
+ * does not limit the used character set, so anything could be used in an SSID.
+ *
+ * This function uses a static buffer, so only one call can be used at the
+ * time, i.e., this is not re-entrant and the returned buffer must be used
+ * before calling this again.
+ */
+const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len)
+{
+ static char ssid_txt[SSID_MAX_LEN * 4 + 1];
+
+ if (ssid == NULL) {
+ ssid_txt[0] = '\0';
+ return ssid_txt;
+ }
+
+ printf_encode(ssid_txt, sizeof(ssid_txt), ssid, ssid_len);
+ return ssid_txt;
+}
+
+
+void * __hide_aliasing_typecast(void *foo)
+{
+ 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;
+}
+
+
+int has_ctrl_char(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;
+}
+
+
+int has_newline(const char *str)
+{
+ while (*str) {
+ if (*str == '\n' || *str == '\r')
+ return 1;
+ str++;
+ }
+ 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]) {
+ if (count == UINT_MAX) {
+ os_free(freq);
+ return -1;
+ }
+ 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;
+}
+
+
+size_t int_array_len(const int *a)
+{
+ size_t i;
+
+ for (i = 0; a && a[i]; i++)
+ ;
+ return i;
+}
+
+
+void int_array_concat(int **res, const int *a)
+{
+ size_t reslen, alen, i, max_size;
+ int *n;
+
+ reslen = int_array_len(*res);
+ alen = int_array_len(a);
+ max_size = (size_t) -1;
+ if (alen >= max_size - reslen) {
+ /* This should not really happen, but if it did, something
+ * would overflow. Do not try to merge the arrays; instead, make
+ * this behave like memory allocation failure to avoid messing
+ * up memory. */
+ os_free(*res);
+ *res = NULL;
+ return;
+ }
+ 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)
+{
+ size_t alen, 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)
+{
+ size_t reslen, max_size;
+ int *n;
+
+ for (reslen = 0; *res && (*res)[reslen]; reslen++) {
+ if ((*res)[reslen] == a)
+ return; /* already in the list */
+ }
+
+ max_size = (size_t) -1;
+ if (reslen > max_size - 2) {
+ /* This should not really happen in practice, but if it did,
+ * something would overflow. Do not try to add the new value;
+ * instead, make this behave like memory allocation failure to
+ * avoid messing up memory. */
+ os_free(*res);
+ *res = NULL;
+ return;
+ }
+ 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);
+ forced_memzero(str, len);
+ os_free(str);
+ }
+}
+
+
+void bin_clear_free(void *bin, size_t len)
+{
+ if (bin) {
+ forced_memzero(bin, 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
+ * further 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) {
+ 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;
+ in_size--;
+ 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) {
+ 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;
+}
+
+
+/**
+ * ssid_parse - Parse a string that contains SSID in hex or text format
+ * @buf: Input NULL terminated string that contains the SSID
+ * @ssid: Output SSID
+ * Returns: 0 on success, -1 otherwise
+ *
+ * The SSID has to be enclosed in double quotes for the text format or space
+ * or NULL terminated string of hex digits for the hex format. buf can include
+ * additional arguments after the SSID.
+ */
+int ssid_parse(const char *buf, struct wpa_ssid_value *ssid)
+{
+ char *tmp, *res, *end;
+ size_t len;
+
+ ssid->ssid_len = 0;
+
+ tmp = os_strdup(buf);
+ if (!tmp)
+ return -1;
+
+ if (*tmp != '"') {
+ end = os_strchr(tmp, ' ');
+ if (end)
+ *end = '\0';
+ } else {
+ end = os_strchr(tmp + 1, '"');
+ if (!end) {
+ os_free(tmp);
+ return -1;
+ }
+
+ end[1] = '\0';
+ }
+
+ res = wpa_config_parse_string(tmp, &len);
+ if (res && len <= SSID_MAX_LEN) {
+ ssid->ssid_len = len;
+ os_memcpy(ssid->ssid, res, len);
+ }
+
+ os_free(tmp);
+ os_free(res);
+
+ return ssid->ssid_len ? 0 : -1;
+}
+
+
+int str_starts(const char *str, const char *start)
+{
+ return os_strncmp(str, start, os_strlen(start)) == 0;
+}
+
+
+/**
+ * rssi_to_rcpi - Convert RSSI to RCPI
+ * @rssi: RSSI to convert
+ * Returns: RCPI corresponding to the given RSSI value, or 255 if not available.
+ *
+ * It's possible to estimate RCPI based on RSSI in dBm. This calculation will
+ * not reflect the correct value for high rates, but it's good enough for Action
+ * frames which are transmitted with up to 24 Mbps rates.
+ */
+u8 rssi_to_rcpi(int rssi)
+{
+ if (!rssi)
+ return 255; /* not available */
+ if (rssi < -110)
+ return 0;
+ if (rssi > 0)
+ return 220;
+ return (rssi + 110) * 2;
+}
+
+
+char * get_param(const char *cmd, const char *param)
+{
+ const char *pos, *end;
+ char *val;
+ size_t len;
+
+ pos = os_strstr(cmd, param);
+ if (!pos)
+ return NULL;
+
+ pos += os_strlen(param);
+ end = os_strchr(pos, ' ');
+ if (end)
+ len = end - pos;
+ else
+ len = os_strlen(pos);
+ val = os_malloc(len + 1);
+ if (!val)
+ return NULL;
+ os_memcpy(val, pos, len);
+ val[len] = '\0';
+ return val;
+}
+
+
+/* Try to prevent most compilers from optimizing out clearing of memory that
+ * becomes unaccessible after this function is called. This is mostly the case
+ * for clearing local stack variables at the end of a function. This is not
+ * exactly perfect, i.e., someone could come up with a compiler that figures out
+ * the pointer is pointing to memset and then end up optimizing the call out, so
+ * try go a bit further by storing the first octet (now zero) to make this even
+ * a bit more difficult to optimize out. Once memset_s() is available, that
+ * could be used here instead. */
+static void * (* const volatile memset_func)(void *, int, size_t) = memset;
+static u8 forced_memzero_val;
+
+void forced_memzero(void *ptr, size_t len)
+{
+ memset_func(ptr, 0, len);
+ if (len)
+ forced_memzero_val = ((u8 *) ptr)[0];
+}