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Set the default maximum DNS UDP packet size to 1232.

Browse Source 
http://www.dnsflagday.net/2020/ refers.

Thanks to Xiang Li for the prompt.
This commit is contained in:
Simon Kelley
2023-03-07 22:07:46 +00:00
parent 9a698434dd
commit eb92fb32b7
3 changed files with 11 additions and 3 deletions
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2
src/config.h
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@@ -19,7 +19,7 @@
#define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */
#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 4096 /* default max EDNS.0 UDP packet from RFC5625 */
#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_WORK 50 /* Max number of queries to validate one question */