pkgs/libnet/patches/libnet-1.1.4-capability.patch

   1 Patch by Robert Scheck <robert@fedoraproject.org> for libnet >= 1.1.4, which backports
   2 capability support instead of explicitly checking for UID 0. Further information can be
   3 found at the following links:
   4
   5  - https://bugzilla.redhat.com/show_bug.cgi?id=589770
   6  - http://github.com/sam-github/libnet/commit/671742244c20804c9e935326e3649dac3382f17a
   7
   8 --- libnet-1.1.4/src/libnet_init.c                      2009-06-05 02:31:44.000000000 +0200
   9 +++ libnet-1.1.4/src/libnet_init.c.capability           2010-07-09 22:57:10.000000000 +0200
  10 @@ -44,14 +44,7 @@
  11  {
  12      libnet_t *l = NULL;
  13
  14 -#if !defined(__WIN32__)
  15 -    if (getuid() && geteuid())
  16 -    {
  17 -        snprintf(err_buf, LIBNET_ERRBUF_SIZE,
  18 -                "%s(): UID or EUID of 0 required\n", __func__);
  19 -        goto bad;
  20 -    }
  21 -#else
  22 +#if defined(__WIN32__)
  23      WSADATA wsaData;
  24
  25      if ((WSAStartup(0x0202, &wsaData)) != 0)
  26 --- libnet-1.1.4/src/libnet_link_linux.c                2009-06-05 02:31:44.000000000 +0200
  27 +++ libnet-1.1.4/src/libnet_link_linux.c.capability     2010-07-09 22:58:33.000000000 +0200
  28 @@ -90,8 +90,15 @@
  29
  30      if (ioctl(l->fd, SIOCGIFHWADDR, &ifr) < 0 )
  31      {
  32 -        snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
  33 -                "SIOCGIFHWADDR: %s", strerror(errno));
  34 +        if (errno == EPERM) {
  35 +            snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
  36 +                     "%s(): UID/EUID 0 or capability CAP_NET_RAW required",
  37 +                     __func__);
  38 +
  39 +        } else {
  40 +            snprintf(l->err_buf, LIBNET_ERRBUF_SIZE,
  41 +                     "socket: %s", strerror(errno));
  42 +        }
  43          goto bad;
  44      }
  45