package/network/services/dnsmasq/patches/0041-Don-t-attempt-to-parse-a-sequence-of-hex-digits-with.patch

   1 From 6799320edb9f8465659259721e01e15f9d263aeb Mon Sep 17 00:00:00 2001
   2 From: Simon Kelley <simon@thekelleys.org.uk>
   3 Date: Mon, 4 Mar 2019 22:59:42 +0000
   4 Subject: [PATCH 41/57] Don't attempt to parse a sequence of hex digits without
   5  any colons as IPv6 address.
   6
   7 Another confusion in the heuristic dhcp-option parsing. Sigh.
   8
   9 Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
  10 ---
  11  src/option.c | 6 +++++-
  12  1 file changed, 5 insertions(+), 1 deletion(-)
  13
  14 --- a/src/option.c
  15 +++ b/src/option.c
  16 @@ -1181,7 +1181,7 @@ static int parse_dhcp_opt(char *errstr,
  17      {
  18        /* characterise the value */
  19        char c;
  20 -      int found_dig = 0;
  21 +      int found_dig = 0, found_colon = 0;
  22        is_addr = is_addr6 = is_hex = is_dec = is_string = 1;
  23        addrs = digs = 1;
  24        dots = 0;
  25 @@ -1195,6 +1195,7 @@ static int parse_dhcp_opt(char *errstr,
  26           {
  27             digs++;
  28             is_dec = is_addr = 0;
  29 +           found_colon = 1;
  30           }
  31         else if (c == '/')
  32           {
  33 @@ -1236,6 +1237,9 @@ static int parse_dhcp_opt(char *errstr,
  34
  35        if (!found_dig)
  36         is_dec = is_addr = 0;
  37 +
  38 +      if (!found_colon)
  39 +       is_addr6 = 0;
  40
  41        /* We know that some options take addresses */
  42        if (opt_len & OT_ADDR_LIST)