Actual SSH connection and terminal emulation (testing)
This commit is contained in:
Michael Jumper
parent
69dbead349
commit
4f7c8c98e7
@ -46,6 +46,7 @@ AC_PROG_LIBTOOL
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# Checks for libraries.
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AC_CHECK_LIB([guac], [guac_get_client],, AC_MSG_ERROR("libguac is required for communication via the guacamole protocol"))
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AC_CHECK_LIB([cairo], [cairo_create],, AC_MSG_ERROR("cairo is required for drawing instructions"))
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AC_CHECK_LIB([ssh], [ssh_new],, AC_MSG_ERROR("libssh is required"))
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PKG_CHECK_MODULES([PANGO], pango);
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PKG_CHECK_MODULES([PANGOCAIRO], pangocairo);
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@ -38,6 +38,8 @@
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#include <stdlib.h>
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#include <string.h>
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#include <libssh/libssh.h>
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#include <cairo/cairo.h>
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#include <pango/pangocairo.h>
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@ -46,15 +48,26 @@
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#include <guacamole/protocol.h>
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#include <guacamole/client.h>
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#define SSH_TERM_STATE_NULL 0
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#define SSH_TERM_STATE_ECHO 1
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#define SSH_TERM_STATE_ESC 2
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#define SSH_TERM_STATE_CSI 3
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#define SSH_TERM_STATE_OSC 4
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#define SSH_TERM_STATE_CHARSET 5
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/* Client plugin arguments */
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const char* GUAC_CLIENT_ARGS[] = {
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"hostname",
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"port",
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"user",
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"password",
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NULL
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};
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typedef struct ssh_guac_client_data {
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ssh_session session;
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ssh_channel term_channel;
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PangoFontDescription* font_desc;
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guac_layer* glyphs[256];
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@ -64,14 +77,22 @@ typedef struct ssh_guac_client_data {
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int term_width;
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int term_height;
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int term_state;
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int term_seq_argc;
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int term_seq_argv[16];
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char term_seq_argv_buffer[16];
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int term_seq_argv_buffer_current;
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int cursor_row;
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int cursor_col;
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} ssh_guac_client_data;
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int ssh_guac_client_handle_messages(guac_client* client);
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int ssh_guac_client_key_handler(guac_client* client, int keysym, int pressed);
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int ssh_guac_client_send_glyph(guac_client* client, int row, int col, char c);
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int ssh_guac_client_print(guac_client* client, const char* c);
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int ssh_guac_client_write(guac_client* client, const char* c, int size);
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int guac_client_init(guac_client* client, int argc, char** argv) {
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@ -87,14 +108,15 @@ int guac_client_init(guac_client* client, int argc, char** argv) {
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client_data->cursor_row = 0;
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client_data->cursor_col = 0;
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client_data->term_width = 80;
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client_data->term_height = 25;
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client_data->term_width = 160;
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client_data->term_height = 50;
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client_data->term_state = SSH_TERM_STATE_ECHO;
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/* Get font */
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client_data->font_desc = pango_font_description_new();
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pango_font_description_set_family(client_data->font_desc, "monospace");
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pango_font_description_set_weight(client_data->font_desc, PANGO_WEIGHT_NORMAL);
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pango_font_description_set_size(client_data->font_desc, 16*PANGO_SCALE);
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pango_font_description_set_size(client_data->font_desc, 8*PANGO_SCALE);
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font_map = pango_cairo_font_map_get_default();
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context = pango_font_map_create_context(font_map);
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@ -128,32 +150,73 @@ int guac_client_init(guac_client* client, int argc, char** argv) {
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guac_flush(io);
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ssh_guac_client_print(client, "Hello World!\r\nThis is a test of the new Guacamole SSH client plugin!!!\r\n");
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guac_flush(io);
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/* Open SSH session */
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client_data->session = ssh_new();
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if (client_data->session == NULL) {
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guac_send_error(io, "Unable to create SSH session.");
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guac_flush(io);
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return 1;
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}
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ssh_guac_client_print(client, "ROW 1\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 2\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 3\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 4\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 5\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 6\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 8\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 9\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 10\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 11\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 12\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 13\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 14\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 15\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 16\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 17\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 18\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 19\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 20\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 21\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 22\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 23\r\n"); guac_flush(io);
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ssh_guac_client_print(client, "ROW 24\r\n"); guac_flush(io);
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/* Set session options */
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ssh_options_set(client_data->session, SSH_OPTIONS_HOST, argv[0]);
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ssh_options_set(client_data->session, SSH_OPTIONS_USER, argv[1]);
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/* Connect */
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if (ssh_connect(client_data->session) != SSH_OK) {
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guac_send_error(io, "Unable to connect via SSH.");
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guac_flush(io);
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return 1;
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}
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/* Authenticate */
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if (ssh_userauth_password(client_data->session, NULL, argv[2]) != SSH_AUTH_SUCCESS) {
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guac_send_error(io, "SSH auth failed.");
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guac_flush(io);
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return 1;
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}
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/* Open channel for terminal */
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client_data->term_channel = channel_new(client_data->session);
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if (client_data->term_channel == NULL) {
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guac_send_error(io, "Unable to open channel.");
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guac_flush(io);
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return 1;
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}
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/* Open session for channel */
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if (channel_open_session(client_data->term_channel) != SSH_OK) {
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guac_send_error(io, "Unable to open channel session.");
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guac_flush(io);
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return 1;
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}
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/* Request PTY */
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if (channel_request_pty(client_data->term_channel) != SSH_OK) {
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guac_send_error(io, "Unable to allocate PTY for channel.");
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guac_flush(io);
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return 1;
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}
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/* Request PTY size */
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if (channel_change_pty_size(client_data->term_channel, client_data->term_width, client_data->term_height) != SSH_OK) {
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guac_send_error(io, "Unable to change PTY size.");
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guac_flush(io);
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return 1;
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}
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/* Request shell */
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if (channel_request_shell(client_data->term_channel) != SSH_OK) {
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guac_send_error(io, "Unable to associate shell with PTY.");
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guac_flush(io);
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return 1;
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}
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guac_log_info("SSH connection successful.");
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/* Set handlers */
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client->handle_messages = ssh_guac_client_handle_messages;
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client->key_handler = ssh_guac_client_key_handler;
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/* Success */
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return 0;
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@ -208,6 +271,34 @@ guac_layer* ssh_guac_client_get_glyph(guac_client* client, char c) {
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}
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int ssh_guac_client_handle_messages(guac_client* client) {
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GUACIO* io = client->io;
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ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
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char buffer[8192];
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/* While data available, write to terminal */
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int bytes_read = 0;
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while (channel_is_open(client_data->term_channel)
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&& !channel_is_eof(client_data->term_channel)
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&& (bytes_read = channel_read_nonblocking(client_data->term_channel, buffer, sizeof(buffer), 0)) > 0) {
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ssh_guac_client_write(client, buffer, bytes_read);
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guac_flush(io);
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}
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/* Notify on error */
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if (bytes_read < 0) {
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guac_send_error(io, "Error reading data.");
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guac_flush(io);
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return 1;
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}
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return 0;
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}
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int ssh_guac_client_send_glyph(guac_client* client, int row, int col, char c) {
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GUACIO* io = client->io;
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@ -216,71 +307,335 @@ int ssh_guac_client_send_glyph(guac_client* client, int row, int col, char c) {
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return guac_send_copy(io,
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glyph, 0, 0, client_data->char_width, client_data->char_height,
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GUAC_COMP_OVER, GUAC_DEFAULT_LAYER,
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GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
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client_data->char_width * col,
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client_data->char_height * row);
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}
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int ssh_guac_client_print(guac_client* client, const char* c) {
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int ssh_guac_client_write(guac_client* client, const char* c, int size) {
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GUACIO* io = client->io;
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ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
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while (*c != 0) {
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while (size > 0) {
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switch (*c) {
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switch (client_data->term_state) {
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/* Carriage return */
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case '\r':
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client_data->cursor_col = 0;
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case SSH_TERM_STATE_NULL:
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break;
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/* Line feed */
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case '\n':
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client_data->cursor_row++;
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break;
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case SSH_TERM_STATE_ECHO:
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/* Displayable chars */
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default:
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ssh_guac_client_send_glyph(client,
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client_data->cursor_row,
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client_data->cursor_col,
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*c);
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/* Advance cursor, wrap if necessary */
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client_data->cursor_col++;
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/* Wrap if necessary */
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if (client_data->cursor_col >= client_data->term_width) {
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client_data->cursor_col = 0;
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client_data->cursor_row++;
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}
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}
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/* Scroll up if necessary */
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if (client_data->cursor_row >= client_data->term_height) {
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client_data->cursor_row = client_data->term_height - 1;
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/* Copy screen up by one row */
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guac_send_copy(io,
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GUAC_DEFAULT_LAYER, 0, client_data->char_height,
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client_data->char_width * client_data->term_width,
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client_data->char_height * (client_data->term_height - 1),
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GUAC_COMP_SRC, GUAC_DEFAULT_LAYER, 0, 0);
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/* Scroll up if necessary */
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if (client_data->cursor_row >= client_data->term_height) {
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client_data->cursor_row = client_data->term_height - 1;
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/* Copy screen up by one row */
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guac_send_copy(io,
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GUAC_DEFAULT_LAYER, 0, client_data->char_height,
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client_data->char_width * client_data->term_width,
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client_data->char_height * (client_data->term_height - 1),
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GUAC_COMP_SRC, GUAC_DEFAULT_LAYER, 0, 0);
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/* Fill bottom row with background */
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guac_send_rect(io,
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GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
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0, client_data->char_height * (client_data->term_height - 1),
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client_data->char_width * client_data->term_width,
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client_data->char_height * client_data->term_height,
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0, 0, 0, 255);
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/* Fill bottom row with background */
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guac_send_rect(io,
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GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
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0, client_data->char_height * (client_data->term_height - 1),
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client_data->char_width * client_data->term_width,
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client_data->char_height * client_data->term_height,
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0, 0, 0, 255);
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}
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switch (*c) {
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/* Bell */
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case 0x07:
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break;
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/* Backspace */
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case 0x08:
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if (client_data->cursor_col >= 1)
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client_data->cursor_col--;
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break;
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/* Carriage return */
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case '\r':
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client_data->cursor_col = 0;
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break;
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/* Line feed */
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case '\n':
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client_data->cursor_row++;
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break;
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/* ESC */
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case 0x1B:
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client_data->term_state = SSH_TERM_STATE_ESC;
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break;
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/* Displayable chars */
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default:
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ssh_guac_client_send_glyph(client,
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client_data->cursor_row,
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client_data->cursor_col,
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*c);
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/* Advance cursor */
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client_data->cursor_col++;
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}
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/* End of SSH_TERM_STATE_ECHO */
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break;
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case SSH_TERM_STATE_CHARSET:
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client_data->term_state = SSH_TERM_STATE_ECHO;
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break;
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case SSH_TERM_STATE_ESC:
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switch (*c) {
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case '(':
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client_data->term_state = SSH_TERM_STATE_CHARSET;
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break;
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case ']':
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client_data->term_state = SSH_TERM_STATE_OSC;
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client_data->term_seq_argc = 0;
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client_data->term_seq_argv_buffer_current = 0;
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break;
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case '[':
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client_data->term_state = SSH_TERM_STATE_CSI;
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client_data->term_seq_argc = 0;
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client_data->term_seq_argv_buffer_current = 0;
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break;
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default:
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guac_log_info("Unhandled ESC sequence: %c", *c);
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client_data->term_state = SSH_TERM_STATE_ECHO;
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}
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/* End of SSH_TERM_STATE_ESC */
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break;
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case SSH_TERM_STATE_OSC:
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/* TODO: Implement OSC */
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if (*c == 0x9C || *c == 0x5C || *c == 0x07) /* ECMA-48 ST (String Terminator */
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client_data->term_state = SSH_TERM_STATE_ECHO;
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/* End of SSH_TERM_STATE_OSC */
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break;
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case SSH_TERM_STATE_CSI:
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/* FIXME: "The sequence of parameters may be preceded by a single question mark. */
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if (*c == '?')
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break; /* Ignore question marks for now... */
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/* Digits get concatenated into argv */
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if (*c >= '0' && *c <= '9') {
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/* Concatenate digit if there is space in buffer */
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if (client_data->term_seq_argv_buffer_current <
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sizeof(client_data->term_seq_argv_buffer)) {
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client_data->term_seq_argv_buffer[
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client_data->term_seq_argv_buffer_current++
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] = *c;
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}
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}
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/* Any non-digit stops the parameter, and possibly the sequence */
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else {
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/* At most 16 parameters */
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if (client_data->term_seq_argc < 16) {
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/* Finish parameter */
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client_data->term_seq_argv_buffer[client_data->term_seq_argv_buffer_current] = 0;
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client_data->term_seq_argv[client_data->term_seq_argc++] =
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atoi(client_data->term_seq_argv_buffer);
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/* Prepare for next parameter */
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client_data->term_seq_argv_buffer_current = 0;
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}
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/* Handle CSI functions */
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switch (*c) {
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/* H: Move cursor */
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case 'H':
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client_data->cursor_row = client_data->term_seq_argv[0] - 1;
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client_data->cursor_col = client_data->term_seq_argv[1] - 1;
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break;
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/* J: Erase display */
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case 'J':
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/* Erase from cursor to end of display */
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if (client_data->term_seq_argv[0] == 0) {
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/* Until end of line */
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guac_send_rect(io,
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GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
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client_data->cursor_col * client_data->char_width,
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client_data->cursor_row * client_data->char_height,
|
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(client_data->term_width - client_data->cursor_col) * client_data->char_width,
|
||||
client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
|
||||
/* Until end of display */
|
||||
if (client_data->cursor_row < client_data->term_height - 1) {
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
0,
|
||||
(client_data->cursor_row+1) * client_data->char_height,
|
||||
client_data->term_width * client_data->char_width,
|
||||
client_data->term_height * client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Erase from start to cursor */
|
||||
else if (client_data->term_seq_argv[0] == 1) {
|
||||
|
||||
/* Until start of line */
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
0,
|
||||
client_data->cursor_row * client_data->char_height,
|
||||
client_data->cursor_col * client_data->char_width,
|
||||
client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
|
||||
/* From start */
|
||||
if (client_data->cursor_row >= 1) {
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
0,
|
||||
0,
|
||||
client_data->term_width * client_data->char_width,
|
||||
(client_data->cursor_row-1) * client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/* Entire screen */
|
||||
else if (client_data->term_seq_argv[0] == 2) {
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
0,
|
||||
0,
|
||||
client_data->term_width * client_data->char_width,
|
||||
client_data->term_height * client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
/* K: Erase line */
|
||||
case 'K':
|
||||
|
||||
/* Erase from cursor to end of line */
|
||||
if (client_data->term_seq_argv[0] == 0) {
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
client_data->cursor_col * client_data->char_width,
|
||||
client_data->cursor_row * client_data->char_height,
|
||||
(client_data->term_width - client_data->cursor_col) * client_data->char_width,
|
||||
client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
}
|
||||
|
||||
/* Erase from start to cursor */
|
||||
else if (client_data->term_seq_argv[0] == 1) {
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
0,
|
||||
client_data->cursor_row * client_data->char_height,
|
||||
client_data->cursor_col * client_data->char_width,
|
||||
client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
}
|
||||
|
||||
/* Erase line */
|
||||
else if (client_data->term_seq_argv[0] == 2) {
|
||||
guac_send_rect(io,
|
||||
GUAC_COMP_SRC, GUAC_DEFAULT_LAYER,
|
||||
0,
|
||||
client_data->cursor_row * client_data->char_height,
|
||||
client_data->term_width * client_data->char_width,
|
||||
client_data->char_height,
|
||||
0, 0, 0, 255); /* Background color */
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
/* Warn of unhandled codes */
|
||||
default:
|
||||
if (*c != ';')
|
||||
guac_log_info("Unhandled CSI sequence: %c", *c);
|
||||
|
||||
}
|
||||
|
||||
/* If not a semicolon, end of CSI sequence */
|
||||
if (*c != ';')
|
||||
client_data->term_state = SSH_TERM_STATE_ECHO;
|
||||
|
||||
}
|
||||
|
||||
/* End of SSH_TERM_STATE_CSI */
|
||||
break;
|
||||
|
||||
}
|
||||
|
||||
c++;
|
||||
size--;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
int ssh_guac_client_key_handler(guac_client* client, int keysym, int pressed) {
|
||||
|
||||
ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
|
||||
|
||||
/* If key pressed */
|
||||
if (pressed) {
|
||||
|
||||
char data;
|
||||
|
||||
/* If simple ASCII key */
|
||||
if (keysym >= 0x00 && keysym <= 0xFF)
|
||||
data = (char) keysym;
|
||||
|
||||
else if (keysym == 0xFF08) data = 0x08;
|
||||
else if (keysym == 0xFF09) data = 0x09;
|
||||
else if (keysym == 0xFF0D) data = 0x0D;
|
||||
|
||||
else
|
||||
return 0;
|
||||
|
||||
return channel_write(client_data->term_channel, &data, 1);
|
||||
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user