netdev - Re: [PATCH net-2.6.24] introduce MAC_FMT/MAC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 27 Aug 2007 13:57:42 -0700
From:	Joe Perches <joe@...ches.com>
To:	David Miller <davem@...emloft.net>
Cc:	johannes@...solutions.net, netdev@...r.kernel.org
Subject: Re: [PATCH net-2.6.24] introduce MAC_FMT/MAC_ARG

On Mon, 2007-08-27 at 13:41 -0700, David Miller wrote:
> From: Johannes Berg <johannes@...solutions.net>
> Date: Mon, 27 Aug 2007 12:54:09 +0200
> > #define MAC_FMT "%s"
> > #define MAC_ARG(a) ({char __buf[18]; print_mac(a, __buf); __buf;})

> I don't think this works.

$ cat test_fmt.c
#include <stdio.h>
#include <stdlib.h>

#define MAC_FMT "%s"
#define MAC_ARG(a) ({char __buf[18]; print_mac(a, __buf); __buf;})

int print_mac(const char* p, char* b)
{
  return sprintf(b, "%02x:%02x:%02x:%02x:%02x:%02x",
		 p[0], p[1], p[2], p[3], p[4], p[5]);
}

int main(int argc, char** argv)
{
  char m1[6] = {1,2,3,4,5,6};
  char m2[6] = {6,5,4,3,2,1};

  printf("m1: " MAC_FMT " m2: " MAC_FMT "\n", MAC_ARG(m1), MAC_ARG(m2));
  return 0;
}

$ gcc test_fmt.c
$ ./a.out
m1: 01:02:03:04:05:06 m2: 06:05:04:03:02:01


-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html