mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-03 04:07:35 +03:00
74be4d2755
This function is the equivalent to the function used to set the UDP receive buffer size. It's so similar that code generation is used to make a copy of the setReceiveBuffer function.
70 lines
2.4 KiB
Go
70 lines
2.4 KiB
Go
// Code generated by go generate. DO NOT EDIT.
|
|
// Source: sys_conn_buffers.go
|
|
|
|
package quic
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"syscall"
|
|
|
|
"github.com/quic-go/quic-go/internal/protocol"
|
|
"github.com/quic-go/quic-go/internal/utils"
|
|
)
|
|
|
|
func setSendBuffer(c net.PacketConn, logger utils.Logger) error {
|
|
conn, ok := c.(interface{ SetWriteBuffer(int) error })
|
|
if !ok {
|
|
return errors.New("connection doesn't allow setting of send buffer size. Not a *net.UDPConn?")
|
|
}
|
|
|
|
var syscallConn syscall.RawConn
|
|
if sc, ok := c.(interface {
|
|
SyscallConn() (syscall.RawConn, error)
|
|
}); ok {
|
|
var err error
|
|
syscallConn, err = sc.SyscallConn()
|
|
if err != nil {
|
|
syscallConn = nil
|
|
}
|
|
}
|
|
// The connection has a SetWriteBuffer method, but we couldn't obtain a syscall.RawConn.
|
|
// This shouldn't happen for a net.UDPConn, but is possible if the connection just implements the
|
|
// net.PacketConn interface and the SetWriteBuffer method.
|
|
// We have no way of checking if increasing the buffer size actually worked.
|
|
if syscallConn == nil {
|
|
return conn.SetWriteBuffer(protocol.DesiredSendBufferSize)
|
|
}
|
|
|
|
size, err := inspectWriteBuffer(syscallConn)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to determine send buffer size: %w", err)
|
|
}
|
|
if size >= protocol.DesiredSendBufferSize {
|
|
logger.Debugf("Conn has send buffer of %d kiB (wanted: at least %d kiB)", size/1024, protocol.DesiredSendBufferSize/1024)
|
|
return nil
|
|
}
|
|
// Ignore the error. We check if we succeeded by querying the buffer size afterward.
|
|
_ = conn.SetWriteBuffer(protocol.DesiredSendBufferSize)
|
|
newSize, err := inspectWriteBuffer(syscallConn)
|
|
if newSize < protocol.DesiredSendBufferSize {
|
|
// Try again with RCVBUFFORCE on Linux
|
|
_ = forceSetSendBuffer(syscallConn, protocol.DesiredSendBufferSize)
|
|
newSize, err = inspectWriteBuffer(syscallConn)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to determine send buffer size: %w", err)
|
|
}
|
|
}
|
|
if err != nil {
|
|
return fmt.Errorf("failed to determine send buffer size: %w", err)
|
|
}
|
|
if newSize == size {
|
|
return fmt.Errorf("failed to increase send buffer size (wanted: %d kiB, got %d kiB)", protocol.DesiredSendBufferSize/1024, newSize/1024)
|
|
}
|
|
if newSize < protocol.DesiredSendBufferSize {
|
|
return fmt.Errorf("failed to sufficiently increase send buffer size (was: %d kiB, wanted: %d kiB, got: %d kiB)", size/1024, protocol.DesiredSendBufferSize/1024, newSize/1024)
|
|
}
|
|
logger.Debugf("Increased send buffer size to %d kiB", newSize/1024)
|
|
return nil
|
|
}
|