From b070e218c6fe61c6ef98e0a3af5ad58d7e627632 Mon Sep 17 00:00:00 2001 From: Bhasker Hariharan Date: Wed, 24 Jun 2020 10:21:44 -0700 Subject: Add support for Stack level options. Linux controls socket send/receive buffers using a few sysctl variables - net.core.rmem_default - net.core.rmem_max - net.core.wmem_max - net.core.wmem_default - net.ipv4.tcp_rmem - net.ipv4.tcp_wmem The first 4 control the default socket buffer sizes for all sockets raw/packet/tcp/udp and also the maximum permitted socket buffer that can be specified in setsockopt(SOL_SOCKET, SO_(RCV|SND)BUF,...). The last two control the TCP auto-tuning limits and override the default specified in rmem_default/wmem_default as well as the max limits. Netstack today only implements tcp_rmem/tcp_wmem and incorrectly uses it to limit the maximum size in setsockopt() as well as uses it for raw/udp sockets. This changelist introduces the other 4 and updates the udp/raw sockets to use the newly introduced variables. The values for min/max match the current tcp_rmem/wmem values and the default value buffers for UDP/RAW sockets is updated to match the linux value of 212KiB up from the really low current value of 32 KiB. Updates #3043 Fixes #3043 PiperOrigin-RevId: 318089805 --- pkg/tcpip/stack/BUILD | 1 + 1 file changed, 1 insertion(+) (limited to 'pkg/tcpip/stack/BUILD') diff --git a/pkg/tcpip/stack/BUILD b/pkg/tcpip/stack/BUILD index 24f52b735..794ddb5c8 100644 --- a/pkg/tcpip/stack/BUILD +++ b/pkg/tcpip/stack/BUILD @@ -48,6 +48,7 @@ go_library( "route.go", "stack.go", "stack_global_state.go", + "stack_options.go", "transport_demuxer.go", ], visibility = ["//visibility:public"], -- cgit v1.2.3