diff options
Diffstat (limited to 'conn/controlfns_linux.go')
| -rw-r--r-- | conn/controlfns_linux.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/conn/controlfns_linux.go b/conn/controlfns_linux.go index 9e26d95..aff6245 100644 --- a/conn/controlfns_linux.go +++ b/conn/controlfns_linux.go @@ -15,6 +15,21 @@ import ( func init() { controlFns = append(controlFns, + // Attempt to set the socket buffer size beyond net.core.{r,w}mem_max by + // using SO_*BUFFORCE. This requires CAP_NET_ADMIN, and is allowed here to + // fail silently - the result of failure is lower performance on very fast + // links or high latency links. + func(network, address string, c syscall.RawConn) error { + return c.Control(func(fd uintptr) { + // Set up to *mem_max + _ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_RCVBUF, socketBufferSize) + _ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_SNDBUF, socketBufferSize) + // Set beyond *mem_max if CAP_NET_ADMIN + _ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_RCVBUFFORCE, socketBufferSize) + _ = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_SNDBUFFORCE, socketBufferSize) + }) + }, + // Enable receiving of the packet information (IP_PKTINFO for IPv4, // IPV6_PKTINFO for IPv6) that is used to implement sticky socket support. func(network, address string, c syscall.RawConn) error { |