package/network/services/dnsmasq/patches/0012-Sane-error-message-when-pcap-file-header-is-wrong.patch

   1 From cc5cc8f1e0b4deaaea4cbefe677989b186c84837 Mon Sep 17 00:00:00 2001
   2 From: Simon Kelley <simon@thekelleys.org.uk>
   3 Date: Sat, 2 Jun 2018 14:45:17 +0100
   4 Subject: [PATCH 12/17] Sane error message when pcap file header is wrong.
   5
   6 Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
   7 ---
   8  src/dump.c | 5 +++--
   9  1 file changed, 3 insertions(+), 2 deletions(-)
  10
  11 --- a/src/dump.c
  12 +++ b/src/dump.c
  13 @@ -64,9 +64,10 @@ void dump_init(void)
  14         die(_("cannot create %s: %s"), daemon->dump_file, EC_FILE);
  15      }
  16    else if ((daemon->dumpfd = open(daemon->dump_file, O_APPEND | O_RDWR)) == -1 ||
  17 -          !read_write(daemon->dumpfd, (void *)&header, sizeof(header), 1) ||
  18 -          header.magic_number != 0xa1b2c3d4)
  19 +          !read_write(daemon->dumpfd, (void *)&header, sizeof(header), 1))
  20      die(_("cannot access %s: %s"), daemon->dump_file, EC_FILE);
  21 +  else if (header.magic_number != 0xa1b2c3d4)
  22 +    die(_("bad header in %s"), daemon->dump_file, EC_FILE);
  23    else
  24      {
  25        /* count existing records */