2008-02-28 02:34:43 +01:00
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/*
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* wpa_supplicant/hostapd / common helper functions, etc.
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* Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
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*
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2012-02-11 15:46:35 +01:00
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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2008-02-28 02:34:43 +01:00
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*/
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#include "includes.h"
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#include "common.h"
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static int hex2num(char c)
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{
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if (c >= '0' && c <= '9')
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return c - '0';
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if (c >= 'a' && c <= 'f')
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return c - 'a' + 10;
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if (c >= 'A' && c <= 'F')
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return c - 'A' + 10;
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return -1;
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}
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2010-12-16 15:11:54 +01:00
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int hex2byte(const char *hex)
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2008-02-28 02:34:43 +01:00
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{
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int a, b;
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a = hex2num(*hex++);
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if (a < 0)
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return -1;
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b = hex2num(*hex++);
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if (b < 0)
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return -1;
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return (a << 4) | b;
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}
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/**
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2010-04-06 09:37:13 +02:00
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* hwaddr_aton - Convert ASCII string to MAC address (colon-delimited format)
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2008-02-28 02:34:43 +01:00
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* @txt: MAC address as a string (e.g., "00:11:22:33:44:55")
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* @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
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* Returns: 0 on success, -1 on failure (e.g., string not a MAC address)
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*/
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int hwaddr_aton(const char *txt, u8 *addr)
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{
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int i;
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for (i = 0; i < 6; i++) {
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int a, b;
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a = hex2num(*txt++);
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if (a < 0)
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return -1;
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b = hex2num(*txt++);
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if (b < 0)
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return -1;
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*addr++ = (a << 4) | b;
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if (i < 5 && *txt++ != ':')
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return -1;
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}
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return 0;
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}
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2011-02-02 16:11:00 +01:00
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/**
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* hwaddr_compact_aton - Convert ASCII string to MAC address (no colon delimitors format)
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* @txt: MAC address as a string (e.g., "001122334455")
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* @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
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* Returns: 0 on success, -1 on failure (e.g., string not a MAC address)
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*/
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int hwaddr_compact_aton(const char *txt, u8 *addr)
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{
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int i;
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for (i = 0; i < 6; i++) {
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int a, b;
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a = hex2num(*txt++);
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if (a < 0)
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return -1;
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b = hex2num(*txt++);
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if (b < 0)
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return -1;
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*addr++ = (a << 4) | b;
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}
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return 0;
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}
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2008-02-28 02:34:43 +01:00
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2010-04-06 09:37:13 +02:00
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/**
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* hwaddr_aton2 - Convert ASCII string to MAC address (in any known format)
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* @txt: MAC address as a string (e.g., 00:11:22:33:44:55 or 0011.2233.4455)
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* @addr: Buffer for the MAC address (ETH_ALEN = 6 bytes)
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* Returns: Characters used (> 0) on success, -1 on failure
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*/
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int hwaddr_aton2(const char *txt, u8 *addr)
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{
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int i;
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const char *pos = txt;
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for (i = 0; i < 6; i++) {
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int a, b;
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while (*pos == ':' || *pos == '.' || *pos == '-')
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pos++;
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a = hex2num(*pos++);
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if (a < 0)
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return -1;
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b = hex2num(*pos++);
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if (b < 0)
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return -1;
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*addr++ = (a << 4) | b;
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}
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return pos - txt;
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}
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2008-02-28 02:34:43 +01:00
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/**
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* hexstr2bin - Convert ASCII hex string into binary data
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* @hex: ASCII hex string (e.g., "01ab")
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* @buf: Buffer for the binary data
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* @len: Length of the text to convert in bytes (of buf); hex will be double
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* this size
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* Returns: 0 on success, -1 on failure (invalid hex string)
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*/
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int hexstr2bin(const char *hex, u8 *buf, size_t len)
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{
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size_t i;
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int a;
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const char *ipos = hex;
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u8 *opos = buf;
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for (i = 0; i < len; i++) {
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a = hex2byte(ipos);
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if (a < 0)
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return -1;
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*opos++ = a;
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ipos += 2;
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}
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return 0;
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}
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/**
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* inc_byte_array - Increment arbitrary length byte array by one
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* @counter: Pointer to byte array
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* @len: Length of the counter in bytes
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*
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* This function increments the last byte of the counter by one and continues
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* rolling over to more significant bytes if the byte was incremented from
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* 0xff to 0x00.
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*/
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void inc_byte_array(u8 *counter, size_t len)
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{
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int pos = len - 1;
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while (pos >= 0) {
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counter[pos]++;
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if (counter[pos] != 0)
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break;
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pos--;
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}
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}
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void wpa_get_ntp_timestamp(u8 *buf)
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{
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struct os_time now;
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u32 sec, usec;
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be32 tmp;
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/* 64-bit NTP timestamp (time from 1900-01-01 00:00:00) */
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os_get_time(&now);
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sec = now.sec + 2208988800U; /* Epoch to 1900 */
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/* Estimate 2^32/10^6 = 4295 - 1/32 - 1/512 */
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usec = now.usec;
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usec = 4295 * usec - (usec >> 5) - (usec >> 9);
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tmp = host_to_be32(sec);
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os_memcpy(buf, (u8 *) &tmp, 4);
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tmp = host_to_be32(usec);
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os_memcpy(buf + 4, (u8 *) &tmp, 4);
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}
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static inline int _wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data,
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size_t len, int uppercase)
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{
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size_t i;
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char *pos = buf, *end = buf + buf_size;
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int ret;
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if (buf_size == 0)
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return 0;
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for (i = 0; i < len; i++) {
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ret = os_snprintf(pos, end - pos, uppercase ? "%02X" : "%02x",
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data[i]);
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if (ret < 0 || ret >= end - pos) {
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end[-1] = '\0';
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return pos - buf;
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}
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pos += ret;
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}
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end[-1] = '\0';
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return pos - buf;
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}
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/**
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* wpa_snprintf_hex - Print data as a hex string into a buffer
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* @buf: Memory area to use as the output buffer
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* @buf_size: Maximum buffer size in bytes (should be at least 2 * len + 1)
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* @data: Data to be printed
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* @len: Length of data in bytes
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* Returns: Number of bytes written
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*/
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int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len)
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{
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return _wpa_snprintf_hex(buf, buf_size, data, len, 0);
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}
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/**
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* wpa_snprintf_hex_uppercase - Print data as a upper case hex string into buf
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* @buf: Memory area to use as the output buffer
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* @buf_size: Maximum buffer size in bytes (should be at least 2 * len + 1)
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* @data: Data to be printed
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* @len: Length of data in bytes
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* Returns: Number of bytes written
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*/
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int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
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size_t len)
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{
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return _wpa_snprintf_hex(buf, buf_size, data, len, 1);
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}
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#ifdef CONFIG_ANSI_C_EXTRA
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#ifdef _WIN32_WCE
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void perror(const char *s)
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{
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wpa_printf(MSG_ERROR, "%s: GetLastError: %d",
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s, (int) GetLastError());
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}
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#endif /* _WIN32_WCE */
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int optind = 1;
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int optopt;
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char *optarg;
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int getopt(int argc, char *const argv[], const char *optstring)
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{
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static int optchr = 1;
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char *cp;
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if (optchr == 1) {
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if (optind >= argc) {
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/* all arguments processed */
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return EOF;
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}
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if (argv[optind][0] != '-' || argv[optind][1] == '\0') {
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/* no option characters */
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return EOF;
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}
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}
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if (os_strcmp(argv[optind], "--") == 0) {
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/* no more options */
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optind++;
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return EOF;
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}
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optopt = argv[optind][optchr];
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cp = os_strchr(optstring, optopt);
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if (cp == NULL || optopt == ':') {
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if (argv[optind][++optchr] == '\0') {
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optchr = 1;
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optind++;
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}
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return '?';
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}
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if (cp[1] == ':') {
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/* Argument required */
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optchr = 1;
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if (argv[optind][optchr + 1]) {
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/* No space between option and argument */
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optarg = &argv[optind++][optchr + 1];
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} else if (++optind >= argc) {
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/* option requires an argument */
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return '?';
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} else {
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/* Argument in the next argv */
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optarg = argv[optind++];
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}
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} else {
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/* No argument */
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if (argv[optind][++optchr] == '\0') {
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optchr = 1;
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optind++;
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}
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optarg = NULL;
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}
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return *cp;
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}
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#endif /* CONFIG_ANSI_C_EXTRA */
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#ifdef CONFIG_NATIVE_WINDOWS
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/**
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* wpa_unicode2ascii_inplace - Convert unicode string into ASCII
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* @str: Pointer to string to convert
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*
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* This function converts a unicode string to ASCII using the same
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* buffer for output. If UNICODE is not set, the buffer is not
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* modified.
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*/
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void wpa_unicode2ascii_inplace(TCHAR *str)
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{
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#ifdef UNICODE
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char *dst = (char *) str;
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while (*str)
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*dst++ = (char) *str++;
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*dst = '\0';
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#endif /* UNICODE */
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}
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TCHAR * wpa_strdup_tchar(const char *str)
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{
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#ifdef UNICODE
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TCHAR *buf;
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buf = os_malloc((strlen(str) + 1) * sizeof(TCHAR));
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if (buf == NULL)
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return NULL;
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wsprintf(buf, L"%S", str);
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return buf;
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#else /* UNICODE */
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return os_strdup(str);
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#endif /* UNICODE */
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}
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#endif /* CONFIG_NATIVE_WINDOWS */
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2012-08-07 12:30:13 +02:00
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void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len)
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{
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char *end = txt + maxlen;
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size_t i;
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for (i = 0; i < len; i++) {
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if (txt + 4 > end)
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break;
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switch (data[i]) {
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case '\"':
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*txt++ = '\\';
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*txt++ = '\"';
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break;
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case '\\':
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*txt++ = '\\';
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*txt++ = '\\';
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break;
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case '\e':
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*txt++ = '\\';
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*txt++ = 'e';
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break;
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case '\n':
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*txt++ = '\\';
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*txt++ = 'n';
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break;
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case '\r':
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*txt++ = '\\';
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*txt++ = 'r';
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break;
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case '\t':
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*txt++ = '\\';
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*txt++ = 't';
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break;
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default:
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if (data[i] >= 32 && data[i] <= 127) {
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*txt++ = data[i];
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} else {
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txt += os_snprintf(txt, end - txt, "\\x%02x",
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data[i]);
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}
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break;
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}
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}
|
|
|
|
|
|
|
|
*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 == 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++] = '\e';
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2008-02-28 02:34:43 +01:00
|
|
|
/**
|
|
|
|
* 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)
|
|
|
|
{
|
2012-08-07 12:32:57 +02:00
|
|
|
static char ssid_txt[32 * 4 + 1];
|
|
|
|
|
|
|
|
if (ssid == NULL) {
|
|
|
|
ssid_txt[0] = '\0';
|
|
|
|
return ssid_txt;
|
2008-02-28 02:34:43 +01:00
|
|
|
}
|
2012-08-07 12:32:57 +02:00
|
|
|
|
|
|
|
printf_encode(ssid_txt, sizeof(ssid_txt), ssid, ssid_len);
|
2008-02-28 02:34:43 +01:00
|
|
|
return ssid_txt;
|
|
|
|
}
|
2009-11-04 18:49:14 +01:00
|
|
|
|
|
|
|
|
|
|
|
void * __hide_aliasing_typecast(void *foo)
|
|
|
|
{
|
|
|
|
return foo;
|
|
|
|
}
|
2012-08-07 15:13:51 +02:00
|
|
|
|
|
|
|
|
|
|
|
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 = os_malloc(*len + 1);
|
|
|
|
if (str == NULL)
|
|
|
|
return NULL;
|
|
|
|
os_memcpy(str, value, *len);
|
|
|
|
str[*len] = '\0';
|
|
|
|
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 = os_malloc(tlen + 1);
|
|
|
|
if (tstr == NULL)
|
|
|
|
return NULL;
|
|
|
|
os_memcpy(tstr, value, tlen);
|
|
|
|
tstr[tlen] = '\0';
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
2012-08-07 15:27:40 +02:00
|
|
|
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
2012-08-19 16:52:41 +02:00
|
|
|
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|