Merge branch 'master' into experimental

Conflicts:
	src/common/guac_surface.c

configure.ac

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2013 Glyptodon LLC
+# Copyright (C) 2015 Glyptodon LLC
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -21,7 +21,7 @@
 #
 
 AC_PREREQ([2.61])
-AC_INIT([guacamole-server], [0.9.7])
+AC_INIT([guacamole-server], [0.9.8])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
 AM_SILENT_RULES([yes])
 

doc/Doxyfile

@@ -31,7 +31,7 @@ PROJECT_NAME           = libguac
 # This could be handy for archiving the generated documentation or
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.9.7
+PROJECT_NUMBER         = 0.9.8
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute)
 # base path where the generated documentation will be put.

src/common-ssh/guac_sftp.c

@@ -34,6 +34,78 @@
 #include <stdlib.h>
 #include <string.h>
 
+/**
+ * Translates the last error message received by the SFTP layer of an SSH
+ * session into a Guacamole protocol status code.
+ *
+ * @param filesystem
+ *     The Guacamole protocol object defining the filesystem associated with
+ *     the SFTP and SSH sessions.
+ *
+ * @return
+ *     The Guacamole protocol status code corresponding to the last reported
+ *     error of the SFTP layer, if nay, or GUAC_PROTOCOL_STATUS_SUCCESS if no
+ *     error has occurred.
+ */
+static guac_protocol_status guac_sftp_get_status(guac_object* filesystem) {
+
+    guac_common_ssh_sftp_data* sftp_data =
+        (guac_common_ssh_sftp_data*) filesystem->data;
+
+    /* Get libssh2 objects */
+    LIBSSH2_SFTP*    sftp    = sftp_data->sftp_session;
+    LIBSSH2_SESSION* session = sftp_data->ssh_session->session;
+
+    /* Return success code if no error occurred */
+    if (libssh2_session_last_errno(session) != LIBSSH2_ERROR_SFTP_PROTOCOL)
+        return GUAC_PROTOCOL_STATUS_SUCCESS;
+
+    /* Translate SFTP error codes defined by
+     * https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02 (the most
+     * commonly-implemented standard) */
+    switch (libssh2_sftp_last_error(sftp)) {
+
+        /* SSH_FX_OK (not an error) */
+        case 0:
+            return GUAC_PROTOCOL_STATUS_SUCCESS;
+
+        /* SSH_FX_EOF (technically not an error) */
+        case 1:
+            return GUAC_PROTOCOL_STATUS_SUCCESS;
+
+        /* SSH_FX_NO_SUCH_FILE */
+        case 2:
+            return GUAC_PROTOCOL_STATUS_RESOURCE_NOT_FOUND;
+
+        /* SSH_FX_PERMISSION_DENIED */
+        case 3:
+            return GUAC_PROTOCOL_STATUS_CLIENT_FORBIDDEN;
+
+        /* SSH_FX_FAILURE */
+        case 4:
+            return GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR;
+
+        /* SSH_FX_BAD_MESSAGE */
+        case 5:
+            return GUAC_PROTOCOL_STATUS_SERVER_ERROR;
+
+        /* SSH_FX_NO_CONNECTION / SSH_FX_CONNECTION_LOST */
+        case 6:
+        case 7:
+            return GUAC_PROTOCOL_STATUS_UPSTREAM_TIMEOUT;
+
+        /* SSH_FX_OP_UNSUPPORTED */
+        case 8:
+            return GUAC_PROTOCOL_STATUS_UNSUPPORTED;
+
+        /* Return generic error if cause unknown */
+        default:
+            return GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR;
+
+    }
+
+}
+
 /**
  * Concatenates the given filename with the given path, separating the two
  * with a single forward slash. The full result must be no more than
@@ -249,7 +321,7 @@ int guac_common_ssh_sftp_handle_file_stream(guac_object* filesystem,
         guac_client_log(client, GUAC_LOG_INFO,
                 "Unable to open file \"%s\"", fullpath);
         guac_protocol_send_ack(client->socket, stream, "SFTP: Open failed",
-                GUAC_PROTOCOL_STATUS_RESOURCE_NOT_FOUND);
+                guac_sftp_get_status(filesystem));
         guac_socket_flush(client->socket);
     }
 
@@ -642,7 +714,7 @@ static int guac_common_ssh_sftp_put_handler(guac_client* client,
         guac_client_log(client, GUAC_LOG_INFO,
                 "Unable to open file \"%s\"", name);
         guac_protocol_send_ack(client->socket, stream, "SFTP: Open failed",
-                GUAC_PROTOCOL_STATUS_RESOURCE_NOT_FOUND);
+                guac_sftp_get_status(object));
     }
 
     /* Set handlers for file stream */

src/guacd/man/guacd.8

@@ -1,4 +1,4 @@
-.TH guacd 8 "8 Jun 2015" "version 0.9.7" "Guacamole"
+.TH guacd 8 "4 Sep 2015" "version 0.9.8" "Guacamole"
 .
 .SH NAME
 guacd \- Guacamole proxy daemon

src/guacd/man/guacd.conf.5

@@ -1,4 +1,4 @@
-.TH guacd.conf 5 "8 Jun 2015" "version 0.9.7" "Guacamole"
+.TH guacd.conf 5 "4 Sep 2015" "version 0.9.8" "Guacamole"
 .
 .SH NAME
 /etc/guacamole/guacd.conf \- Configuration file for guacd

src/libguac/Makefile.am

@@ -99,7 +99,7 @@ libguac_la_CFLAGS = \
     -Werror -Wall -pedantic -Iguacamole
 
 libguac_la_LDFLAGS =     \
-    -version-info 9:0:0 \
+    -version-info 10:0:0 \
     @CAIRO_LIBS@         \
     @JPEG_LIBS@          \
     @PNG_LIBS@           \

src/protocols/telnet/guac_handlers.c

@@ -84,6 +84,19 @@ int guac_telnet_client_key_handler(guac_client* client, int keysym, int pressed)
 
     }
 
+    /* Intercept and handle Pause / Break / Ctrl+0 as "IAC BRK" */
+    if (pressed && (
+                keysym == 0xFF13                  /* Pause */
+             || keysym == 0xFF6B                  /* Break */
+             || (term->mod_ctrl && keysym == '0') /* Ctrl + 0 */
+       )) {
+
+        /* Send IAC BRK */
+        telnet_iac(client_data->telnet, TELNET_BREAK);
+
+        return 0;
+    }
+
     /* Send key */
     guac_terminal_send_key(term, keysym, pressed);
 

src/protocols/vnc/pulse.c

@@ -27,8 +27,41 @@
 
 #include <guacamole/audio.h>
 #include <guacamole/client.h>
+#include <guacamole/socket.h>
 #include <pulse/pulseaudio.h>
 
+/**
+ * Returns whether the given buffer contains only silence (only null bytes).
+ *
+ * @param buffer
+ *     The audio buffer to check.
+ *
+ * @param length
+ *     The length of the buffer to check.
+ *
+ * @return
+ *     Non-zero if the audio buffer contains silence, zero otherwise.
+ */
+static int guac_pa_is_silence(const void* buffer, size_t length) {
+
+    int i;
+
+    const unsigned char* current = (const unsigned char*) buffer;
+
+    /* For each byte in buffer */
+    for (i = 0; i < length; i++) {
+
+        /* If current value non-zero, then not silence */
+        if (*(current++))
+            return 0;
+
+    }
+
+    /* Otherwise, the buffer contains 100% silence */
+    return 1;
+
+}
+
 static void __stream_read_callback(pa_stream* stream, size_t length,
         void* data) {
 
@@ -41,6 +74,9 @@ static void __stream_read_callback(pa_stream* stream, size_t length,
     /* Read data */
     pa_stream_peek(stream, &buffer, &length);
 
+    /* Avoid sending silence unless data is waiting to be flushed */
+    if (audio->pcm_bytes_written != 0 || !guac_pa_is_silence(buffer, length)) {
+
         /* Write data */
         guac_audio_stream_write_pcm(audio, buffer, length);
 
@@ -51,6 +87,9 @@ static void __stream_read_callback(pa_stream* stream, size_t length,
                     GUAC_VNC_AUDIO_RATE,
                     GUAC_VNC_AUDIO_CHANNELS,
                     GUAC_VNC_AUDIO_BPS);
+            guac_socket_flush(client->socket);
+        }
+
     }
 
     /* Advance buffer */