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Simplify EDNS0 packet size handling.

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In the post 2020 flag-day world, we limit UDP packets to 1232 bytes
which can go anywhere, so the dodgy code to try and determine the
functional maxmimum packet size on the path from upstream servers
is obsolete.
This commit is contained in:
Simon Kelley
2024-11-24 23:06:22 +00:00
parent 04d7693d86
commit f04cf8506a
5 changed files with 31 additions and 75 deletions
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src/config.h
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@@ -20,7 +20,6 @@
#define TCP_MAX_QUERIES 100 /* Maximum number of queries per incoming TCP connection */
#define TCP_BACKLOG 32 /* kernel backlog limit for TCP connections */
#define EDNS_PKTSZ 1232 /* default max EDNS.0 UDP packet from from /dnsflagday.net/2020 */
#define SAFE_PKTSZ 1232 /* "go anywhere" UDP packet size, see https://dnsflagday.net/2020/ */
#define KEYBLOCK_LEN 40 /* choose to minimise fragmentation when storing DNSSEC keys */
#define DNSSEC_LIMIT_WORK 40 /* Max number of queries to validate one question */
#define DNSSEC_LIMIT_SIG_FAIL 20 /* Number of signature that can fail to validate in one answer */