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util: Add compact MAC address formatting/parsing

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The P2P DBus interface will use addresses for
DBus paths, and uses them without any separators.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2011-02-02 17:11:00 +02:00 committed by Jouni Malinen
parent d750b7e699
commit 0c11c63375
2 changed files with 31 additions and 0 deletions
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24
src/utils/common.c
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@ -69,6 +69,30 @@ int hwaddr_aton(const char *txt, u8 *addr)
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)

7
src/utils/common.h
View file

@ -402,6 +402,12 @@ void perror(const char *s);
#ifndef MAC2STR
#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
/*
* Compact form for string representation of MAC address
* To be used, e.g., for constructing dbus paths for P2P Devices
*/
#define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x"
#endif
#ifndef BIT
@ -436,6 +442,7 @@ typedef u64 __bitwise le64;
#endif /* __must_check */
int hwaddr_aton(const char *txt, u8 *addr);
int hwaddr_compact_aton(const char *txt, u8 *addr);
int hwaddr_aton2(const char *txt, u8 *addr);
int hex2byte(const char *hex);
int hexstr2bin(const char *hex, u8 *buf, size_t len);