Ondřej Surý bb990030d3 Simplify the EDNS buffer size logic for DNS Flag Day 2020 ...

The DNS Flag Day 2020 aims to remove the IP fragmentation problem from
the UDP DNS communication.  In this commit, we implement the required
changes and simplify the logic for picking the EDNS Buffer Size.

1. The defaults for `edns-udp-size`, `max-udp-size` and
   `nocookie-udp-size` have been changed to `1232` (the value picked by
   DNS Flag Day 2020).

2. The probing heuristics that would try 512->4096->1432->1232 buffer
   sizes has been removed and the resolver will always use just the
   `edns-udp-size` value.

3. Instead of just disabling the PMTUD mechanism on the UDP sockets, we
   now set IP_DONTFRAG (IPV6_DONTFRAG) flag.  That means that the UDP
   packets won't get ever fragmented.  If the ICMP packets are lost the
   UDP will just timeout and eventually be retried over TCP.

2020-10-05 16:21:21 +02:00

..

include

Add the ability to select tests to run

2020-10-01 08:21:42 +00:00

netmgr

Split reusing the addr/port and load-balancing socket options

2020-10-05 15:18:28 +02:00

pthreads

update all copyright headers to eliminate the typo

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tests

Add the ability to print out the list of test names (-l)

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unix

Simplify the EDNS buffer size logic for DNS Flag Day 2020

2020-10-05 16:21:21 +02:00

win32

Add helper function to enable DF (don't fragment) flag on UDP sockets

2020-10-05 14:55:20 +02:00

.gitignore

[master] update gitignore files; use rev-parse to get srcid

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aes.c

update all copyright headers to eliminate the typo

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api

Update library API versions

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app.c

update all copyright headers to eliminate the typo

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assertions.c

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astack.c

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backtrace.c

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base32.c

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base64.c

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bind9.c

update all copyright headers to eliminate the typo

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buffer.c

update all copyright headers to eliminate the typo

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bufferlist.c

update all copyright headers to eliminate the typo

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commandline.c

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counter.c

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crc64.c

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entropy_private.h

update all copyright headers to eliminate the typo

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entropy.c

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error.c

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event.c

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fsaccess_common_p.h

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fsaccess_common.c

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glob.c

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hash.c

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heap.c

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hex.c

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hmac.c

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hp.c

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ht.c

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httpd.c

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iterated_hash.c

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lex.c

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lib.c

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log.c

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Makefile.am

Add the ability to select tests to run

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md.c

update all copyright headers to eliminate the typo

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mem_p.h

update all copyright headers to eliminate the typo

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mem.c

Exclude isc_mem_isovermem from ThreadSanitizer

2020-09-17 13:51:50 +00:00

mutexblock.c

update all copyright headers to eliminate the typo

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netaddr.c

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netscope.c

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nonce.c

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openssl_shim.c

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openssl_shim.h

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parseint.c

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pk11_result.c

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pk11.c

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pool.c

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portset.c

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queue.c

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quota.c

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radix.c

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random.c

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ratelimiter.c

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regex.c

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region.c

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result.c

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rwlock.c

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safe.c

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serial.c

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siphash.c

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sockaddr.c

update all copyright headers to eliminate the typo

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stats.c

update all copyright headers to eliminate the typo

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string.c

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symtab.c

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task_p.h

update all copyright headers to eliminate the typo

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task.c

update all copyright headers to eliminate the typo

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taskpool.c

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timer_p.h

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timer.c

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tm.c

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utf8.c

update all copyright headers to eliminate the typo

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