[Dnsmasq-discuss] DNSpooq v2.80 backport patch

[WU, CHRIS]

>The patch does address all seven CVEs. Note that there's a second version of the patch, at
>which 1) fixes a regression seen in 2.83 and 2) was created with the correct flags to patch, so the new file src/hash_questions.c is included.
>
>Cheers,
>Simon.

Hi Simon. 

FYI, this newest patch won't compile for some of your users.  Version 2.80 of dnsmasq was still one where you could compile it without IPv6 support using "-DNO_IPV6".

When I applied the patch I got these errors:

forward.c: In function ‘lookup_frec’:
forward.c:2414:29: error: ‘struct frec’ has no member named ‘rfd6’
  if (family == AF_INET6 && f->rfd6 && f->rfd6->fd == fd)
                             ^
forward.c:2414:40: error: ‘struct frec’ has no member named ‘rfd6’
  if (family == AF_INET6 && f->rfd6 && f->rfd6->fd == fd)

The issue is inside of struct frec.  Since I have IPv6 turned off the “#ifdef HAVE_IPV6” means rfd6 isn’t included in the struct.

struct frec {
  struct frec_src {
    union mysockaddr source;
    struct all_addr dest;
    unsigned int iface, log_id;
    unsigned short orig_id;
    int fd;
    struct frec_src *next;
  } frec_src;
  struct server *sentto; /* NULL means free */
  struct randfd *rfd4;
#ifdef HAVE_IPV6
  struct randfd *rfd6;
#endif