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util: Add SSID to UTF8 pretty-print function

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Use a static buffer for converting an SSID to an approximate string in
UTF8. Replace each char that is not UTF8 compatible with the UTF8
replacement symbol.
This commit is contained in:
Patrik Flykt 2014-12-18 11:41:33 +02:00 committed by Denis Kenzior
parent 007d9f3bd1
commit bf25abf38d
3 changed files with 109 additions and 1 deletions
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3
Makefile.am
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@ -60,7 +60,8 @@ monitor_iwmon_SOURCES = monitor/main.c linux/nl80211.h \
monitor/nlmon.h monitor/nlmon.c \
monitor/pcap.h monitor/pcap.c \
monitor/display.h monitor/display.c \
src/ie.h src/ie.c
src/ie.h src/ie.c \
src/util.h src/util.c
monitor_iwmon_LDADD = ell/libell-internal.la
noinst_PROGRAMS = tools/hwsim

76
src/util.c Normal file
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@ -0,0 +1,76 @@
/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2014 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <ell/string.h>
#include "util.h"
const char *util_ssid_to_utf8(size_t len, const uint8_t *ssid)
{
static char buf[3* 32 + 1];
size_t i = 0, pos = 0;
const uint8_t *start = ssid, *end;
memset(buf, 0, sizeof(buf));
if (len > 32)
goto no_ssid;
while (i < len && !ssid[i])
i++;
if (i == len)
goto no_ssid;
i = len;
while (i && (!l_utf8_validate((const char *)start, i,
(const char **)&end))) {
const char replacement[] = { 0xEF, 0xBF, 0xBD };
int bytes = end - start;
memcpy(&buf[pos], start, bytes);
pos += bytes;
memcpy(&buf[pos], replacement, sizeof(replacement));
pos += sizeof(replacement);
start = end + 1;
i -= (bytes + 1);
}
if (i) {
memcpy(&buf[pos], start, i);
pos += i;
}
no_ssid:
buf[pos] = '\0';
return buf;
}

31
src/util.h Normal file
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@ -0,0 +1,31 @@
/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2013-2014 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef __UTIL_H
#define __UTIL_H
#include <stdint.h>
#include <unistd.h>
const char *util_ssid_to_utf8(size_t len, const uint8_t *ssid);
#endif /* __UTIL_H */