GUACAMOLE-623: Add support for setting terminal font for Kubernetes via "argv".
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c26672e281
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@ -29,6 +29,7 @@ ACLOCAL_AMFLAGS = -I m4
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lib_LTLIBRARIES = libguac-client-kubernetes.la
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lib_LTLIBRARIES = libguac-client-kubernetes.la
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libguac_client_kubernetes_la_SOURCES = \
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libguac_client_kubernetes_la_SOURCES = \
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argv.c \
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client.c \
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client.c \
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clipboard.c \
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clipboard.c \
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input.c \
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input.c \
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@ -41,6 +42,7 @@ libguac_client_kubernetes_la_SOURCES = \
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user.c
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user.c
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noinst_HEADERS = \
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noinst_HEADERS = \
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argv.h \
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client.h \
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client.h \
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clipboard.h \
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clipboard.h \
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input.h \
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input.h \
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195
src/protocols/kubernetes/argv.c
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195
src/protocols/kubernetes/argv.c
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@ -0,0 +1,195 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "config.h"
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#include "argv.h"
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#include "kubernetes.h"
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#include "terminal/terminal.h"
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#include <guacamole/protocol.h>
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#include <guacamole/socket.h>
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#include <guacamole/user.h>
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#include <stdlib.h>
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#include <string.h>
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/**
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* All Kubernetes connection settings which may be updated by unprivileged
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* users through "argv" streams.
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*/
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typedef enum guac_kubernetes_argv_setting {
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/**
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* The color scheme of the terminal.
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*/
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GUAC_KUBERNETES_ARGV_SETTING_COLOR_SCHEME,
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/**
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* The name of the font family used by the terminal.
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*/
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GUAC_KUBERNETES_ARGV_SETTING_FONT_NAME,
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/**
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* The size of the font used by the terminal, in points.
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*/
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GUAC_KUBERNETES_ARGV_SETTING_FONT_SIZE
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} guac_kubernetes_argv_setting;
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/**
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* The value or current status of a connection parameter received over an
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* "argv" stream.
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*/
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typedef struct guac_kubernetes_argv {
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/**
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* The specific setting being updated.
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*/
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guac_kubernetes_argv_setting setting;
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/**
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* Buffer space for containing the received argument value.
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*/
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char buffer[GUAC_KUBERNETES_ARGV_MAX_LENGTH];
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/**
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* The number of bytes received so far.
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*/
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int length;
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} guac_kubernetes_argv;
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/**
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* Handler for "blob" instructions which appends the data from received blobs
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* to the end of the in-progress argument value buffer.
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*
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* @see guac_user_blob_handler
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*/
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static int guac_kubernetes_argv_blob_handler(guac_user* user,
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guac_stream* stream, void* data, int length) {
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guac_kubernetes_argv* argv = (guac_kubernetes_argv*) stream->data;
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/* Calculate buffer size remaining, including space for null terminator,
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* adjusting received length accordingly */
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int remaining = sizeof(argv->buffer) - argv->length - 1;
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if (length > remaining)
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length = remaining;
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/* Append received data to end of buffer */
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memcpy(argv->buffer + argv->length, data, length);
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argv->length += length;
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return 0;
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}
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/**
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* Handler for "end" instructions which applies the changes specified by the
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* argument value buffer associated with the stream.
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*
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* @see guac_user_end_handler
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*/
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static int guac_kubernetes_argv_end_handler(guac_user* user,
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guac_stream* stream) {
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int size;
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guac_client* client = user->client;
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guac_kubernetes_client* kubernetes_client = (guac_kubernetes_client*) client->data;
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guac_terminal* terminal = kubernetes_client->term;
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/* Append null terminator to value */
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guac_kubernetes_argv* argv = (guac_kubernetes_argv*) stream->data;
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argv->buffer[argv->length] = '\0';
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/* Apply changes to chosen setting */
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switch (argv->setting) {
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/* Update color scheme */
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case GUAC_KUBERNETES_ARGV_SETTING_COLOR_SCHEME:
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guac_terminal_apply_color_scheme(terminal, argv->buffer);
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break;
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/* Update font name */
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case GUAC_KUBERNETES_ARGV_SETTING_FONT_NAME:
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guac_terminal_apply_font(terminal, argv->buffer, -1, 0);
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break;
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/* Update font size */
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case GUAC_KUBERNETES_ARGV_SETTING_FONT_SIZE:
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/* Update only if font size is sane */
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size = atoi(argv->buffer);
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if (size > 0) {
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guac_terminal_apply_font(terminal, NULL, size,
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kubernetes_client->settings->resolution);
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}
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break;
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}
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/* Update Kubernetes terminal size */
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guac_kubernetes_resize(client, terminal->term_height,
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terminal->term_width);
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free(argv);
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return 0;
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}
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int guac_kubernetes_argv_handler(guac_user* user, guac_stream* stream,
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char* mimetype, char* name) {
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guac_kubernetes_argv_setting setting;
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/* Allow users to update the color scheme and font details */
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if (strcmp(name, "color-scheme") == 0)
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setting = GUAC_KUBERNETES_ARGV_SETTING_COLOR_SCHEME;
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else if (strcmp(name, "font-name") == 0)
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setting = GUAC_KUBERNETES_ARGV_SETTING_FONT_NAME;
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else if (strcmp(name, "font-size") == 0)
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setting = GUAC_KUBERNETES_ARGV_SETTING_FONT_SIZE;
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/* No other connection parameters may be updated */
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else {
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guac_protocol_send_ack(user->socket, stream, "Not allowed.",
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GUAC_PROTOCOL_STATUS_CLIENT_FORBIDDEN);
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guac_socket_flush(user->socket);
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return 0;
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}
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guac_kubernetes_argv* argv = malloc(sizeof(guac_kubernetes_argv));
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argv->setting = setting;
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argv->length = 0;
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/* Prepare stream to receive argument value */
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stream->blob_handler = guac_kubernetes_argv_blob_handler;
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stream->end_handler = guac_kubernetes_argv_end_handler;
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stream->data = argv;
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/* Signal stream is ready */
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guac_protocol_send_ack(user->socket, stream, "Ready for updated "
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"parameter.", GUAC_PROTOCOL_STATUS_SUCCESS);
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guac_socket_flush(user->socket);
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return 0;
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}
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41
src/protocols/kubernetes/argv.h
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41
src/protocols/kubernetes/argv.h
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@ -0,0 +1,41 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef GUAC_KUBERNETES_ARGV_H
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#define GUAC_KUBERNETES_ARGV_H
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#include "config.h"
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#include <guacamole/user.h>
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/**
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* The maximum number of bytes to allow for any argument value received via an
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* argv stream, including null terminator.
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*/
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#define GUAC_KUBERNETES_ARGV_MAX_LENGTH 16384
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/**
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* Handles an incoming stream from a Guacamole "argv" instruction, updating the
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* given connection parameter if that parameter is allowed to be updated.
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*/
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guac_user_argv_handler guac_kubernetes_argv_handler;
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#endif
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@ -17,6 +17,7 @@
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* under the License.
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* under the License.
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*/
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*/
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#include "argv.h"
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#include "clipboard.h"
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#include "clipboard.h"
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#include "common/cursor.h"
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#include "common/cursor.h"
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#include "input.h"
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#include "input.h"
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@ -87,6 +88,9 @@ int guac_kubernetes_user_join_handler(guac_user* user, int argc, char** argv) {
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/* STDIN redirection */
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/* STDIN redirection */
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user->pipe_handler = guac_kubernetes_pipe_handler;
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user->pipe_handler = guac_kubernetes_pipe_handler;
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/* Updates to connection parameters */
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user->argv_handler = guac_kubernetes_argv_handler;
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/* Display size change events */
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/* Display size change events */
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user->size_handler = guac_kubernetes_user_size_handler;
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user->size_handler = guac_kubernetes_user_size_handler;
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