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| author | Cristian RodrÃguez <cristian@rodriguez.im> | 2023-04-07 03:52:52 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-04-07 09:52:52 +0200 |
| commit | e144a26306dbe07fe37f294301421a938b781247 (patch) | |
| tree | 259e548af9d5cc274e7c4a14cdadfea94c60f1a9 /src/resolve | |
| parent | 1e094cb4ba258496dd8b210658106f3d196252a2 (diff) | |
| download | systemd-e144a26306dbe07fe37f294301421a938b781247.tar.gz | |
resolve: change DNS_PACKET_UNICAST_SIZE_LARGE_MAX to 1232 (#27171)
The old common default was 4096, until 2020 on which all DNS servers (verified
on BIND9, NSD, Unbound, dnsmasq) switched to 1232 as an agreed max size [1].
[1] https://www.dnsflagday.net/2020/#message-size-considerations
Diffstat (limited to 'src/resolve')
| -rw-r--r-- | src/resolve/resolved-dns-packet.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h index 505e3e7ba9..e4d3e94c68 100644 --- a/src/resolve/resolved-dns-packet.h +++ b/src/resolve/resolved-dns-packet.h @@ -55,8 +55,8 @@ assert_cc(sizeof(DnsPacketHeader) == 12); /* RFC 1035 say 512 is the maximum, for classic unicast DNS */ #define DNS_PACKET_UNICAST_SIZE_MAX 512u -/* With EDNS0 we can use larger packets, default to 4096, which is what is commonly used */ -#define DNS_PACKET_UNICAST_SIZE_LARGE_MAX 4096u +/* With EDNS0 we can use larger packets, default to 1232, which is what is commonly used */ +#define DNS_PACKET_UNICAST_SIZE_LARGE_MAX 1232u struct DnsPacket { unsigned n_ref; |