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Add EDE "filtered" extended error when --filter-A or --filter-AAAA act.

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If a NODATA answer is returned instead of actual data for A or AAAA
queries because of the existence of --filter-A or --filter-AAAA
config options, then mark the replies with an EDE "filtered" tag.

Basic patch by Petr Menšík, tweaked by Simon Kelley to apply onto
the preceding caching patches.
This commit is contained in:
Simon Kelley
2023-03-20 18:32:14 +00:00
parent 2842972035
commit 1f0f86a0d0
5 changed files with 83 additions and 47 deletions
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4
src/dnsmasq.h
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@@ -1366,7 +1366,7 @@ void report_addresses(struct dns_header *header, size_t len, u32 mark);
size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
struct in_addr local_addr, struct in_addr local_netmask,
time_t now, int ad_reqd, int do_bit, int have_pseudoheader,
int *stale);
int *stale, int *filtered);
int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
time_t now);
int check_for_ignored_address(struct dns_header *header, size_t qlen);
@@ -1811,7 +1811,7 @@ void poll_listen(int fd, short event);
int do_poll(int timeout);
/* rrfilter.c */
size_t rrfilter(struct dns_header *header, size_t plen, int mode);
size_t rrfilter(struct dns_header *header, size_t *plen, int mode);
u16 *rrfilter_desc(int type);
int expand_workspace(unsigned char ***wkspc, int *szp, int new);
/* modes. */