From c64e1e75381d0cb53f9fc8f93245a933b12c68a6 Mon Sep 17 00:00:00 2001 From: Yu-Chen Lin Date: Sat, 23 Nov 2019 11:43:06 +0800 Subject: [PATCH] io/channel-websock: treat 'binary' and no sub-protocol as the same MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit noVNC doesn't use 'binary' protocol by default after commit c912230309806aacbae4295faf7ad6406da97617. It will cause qemu return 400 when handshaking. To overcome this problem and remain compatibility of older noVNC client. We treat 'binary' and no sub-protocol as the same so that we can support different version of noVNC client. Tested on noVNC before c912230 and after c912230. Buglink: https://bugs.launchpad.net/qemu/+bug/1849644 Signed-off-by: Yu-Chen Lin Signed-off-by: Daniel P. Berrangé --- io/channel-websock.c | 36 ++++++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 12 deletions(-) diff --git a/io/channel-websock.c b/io/channel-websock.c index fc36d44eba..47a0e941d9 100644 --- a/io/channel-websock.c +++ b/io/channel-websock.c @@ -49,13 +49,20 @@ "Server: QEMU VNC\r\n" \ "Date: %s\r\n" +#define QIO_CHANNEL_WEBSOCK_HANDSHAKE_WITH_PROTO_RES_OK \ + "HTTP/1.1 101 Switching Protocols\r\n" \ + QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ + "Upgrade: websocket\r\n" \ + "Connection: Upgrade\r\n" \ + "Sec-WebSocket-Accept: %s\r\n" \ + "Sec-WebSocket-Protocol: binary\r\n" \ + "\r\n" #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_OK \ "HTTP/1.1 101 Switching Protocols\r\n" \ QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_COMMON \ "Upgrade: websocket\r\n" \ "Connection: Upgrade\r\n" \ "Sec-WebSocket-Accept: %s\r\n" \ - "Sec-WebSocket-Protocol: binary\r\n" \ "\r\n" #define QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_NOT_FOUND \ "HTTP/1.1 404 Not Found\r\n" \ @@ -336,6 +343,7 @@ qio_channel_websock_find_header(QIOChannelWebsockHTTPHeader *hdrs, static void qio_channel_websock_handshake_send_res_ok(QIOChannelWebsock *ioc, const char *key, + const bool use_protocols, Error **errp) { char combined_key[QIO_CHANNEL_WEBSOCK_CLIENT_KEY_LEN + @@ -361,8 +369,14 @@ static void qio_channel_websock_handshake_send_res_ok(QIOChannelWebsock *ioc, } date = qio_channel_websock_date_str(); - qio_channel_websock_handshake_send_res( - ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_OK, date, accept); + if (use_protocols) { + qio_channel_websock_handshake_send_res( + ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_WITH_PROTO_RES_OK, + date, accept); + } else { + qio_channel_websock_handshake_send_res( + ioc, QIO_CHANNEL_WEBSOCK_HANDSHAKE_RES_OK, date, accept); + } g_free(date); g_free(accept); @@ -387,10 +401,6 @@ static void qio_channel_websock_handshake_process(QIOChannelWebsock *ioc, protocols = qio_channel_websock_find_header( hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_PROTOCOL); - if (!protocols) { - error_setg(errp, "Missing websocket protocol header data"); - goto bad_request; - } version = qio_channel_websock_find_header( hdrs, nhdrs, QIO_CHANNEL_WEBSOCK_HEADER_VERSION); @@ -430,10 +440,12 @@ static void qio_channel_websock_handshake_process(QIOChannelWebsock *ioc, trace_qio_channel_websock_http_request(ioc, protocols, version, host, connection, upgrade, key); - if (!g_strrstr(protocols, QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY)) { - error_setg(errp, "No '%s' protocol is supported by client '%s'", - QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY, protocols); - goto bad_request; + if (protocols) { + if (!g_strrstr(protocols, QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY)) { + error_setg(errp, "No '%s' protocol is supported by client '%s'", + QIO_CHANNEL_WEBSOCK_PROTOCOL_BINARY, protocols); + goto bad_request; + } } if (!g_str_equal(version, QIO_CHANNEL_WEBSOCK_SUPPORTED_VERSION)) { @@ -467,7 +479,7 @@ static void qio_channel_websock_handshake_process(QIOChannelWebsock *ioc, goto bad_request; } - qio_channel_websock_handshake_send_res_ok(ioc, key, errp); + qio_channel_websock_handshake_send_res_ok(ioc, key, !!protocols, errp); return; bad_request: