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91 lines
2.3 KiB
91 lines
2.3 KiB
package http2interop
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import (
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"fmt"
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"time"
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)
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// Section 6.5 says the minimum SETTINGS_MAX_FRAME_SIZE is 16,384
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func testSmallMaxFrameSize(ctx *HTTP2InteropCtx) error {
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conn, err := connect(ctx)
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if err != nil {
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return err
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}
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defer conn.Close()
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conn.SetDeadline(time.Now().Add(defaultTimeout))
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sf := &SettingsFrame{
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Params: []SettingsParameter{{
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Identifier: SettingsMaxFrameSize,
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Value: 1<<14 - 1, // 1 less than the smallest maximum
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}},
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}
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if err := http2Connect(conn, sf); err != nil {
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return err
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}
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if _, err := expectGoAwaySoon(conn); err != nil {
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return err
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}
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return nil
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}
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// Section 6.5.3 says all settings frames must be acked.
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func testAllSettingsFramesAcked(ctx *HTTP2InteropCtx) error {
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conn, err := connect(ctx)
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if err != nil {
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return err
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}
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defer conn.Close()
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conn.SetDeadline(time.Now().Add(defaultTimeout))
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sf := &SettingsFrame{}
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if err := http2Connect(conn, sf); err != nil {
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return err
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}
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// The spec says "The values in the SETTINGS frame MUST be processed in the order they
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// appear. [...] Once all values have been processed, the recipient MUST immediately
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// emit a SETTINGS frame with the ACK flag set." From my understanding, processing all
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// of no values warrants an ack per frame.
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for i := 0; i < 10; i++ {
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if err := streamFrame(conn, sf); err != nil {
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return err
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}
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}
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var settingsFramesReceived = 0
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// The server by default sends a settings frame as part of the handshake, and another
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// after the receipt of the initial settings frame as part of our conneection preface.
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// This means we expected 1 + 1 + 10 = 12 settings frames in return, with all but the
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// first having the ack bit.
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for settingsFramesReceived < 12 {
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f, err := parseFrame(conn)
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if err != nil {
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return err
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}
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// Other frames come down the wire too, including window update. Just ignore those.
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if f, ok := f.(*SettingsFrame); ok {
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settingsFramesReceived += 1
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if settingsFramesReceived == 1 {
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if f.Header.Flags&SETTINGS_FLAG_ACK > 0 {
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return fmt.Errorf("settings frame should not have used ack: %v")
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}
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continue
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}
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if f.Header.Flags&SETTINGS_FLAG_ACK == 0 {
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return fmt.Errorf("settings frame should have used ack: %v", f)
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}
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if len(f.Params) != 0 {
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return fmt.Errorf("settings ack cannot have params: %v", f)
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}
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}
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}
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return nil
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}
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