diff options
Diffstat (limited to 'libjava/classpath/native/plugin')
| -rw-r--r-- | libjava/classpath/native/plugin/.cvsignore | 6 | ||||
| -rw-r--r-- | libjava/classpath/native/plugin/Makefile.am | 18 | ||||
| -rw-r--r-- | libjava/classpath/native/plugin/Makefile.in | 627 | ||||
| -rw-r--r-- | libjava/classpath/native/plugin/gcjwebplugin.cc | 1803 |
4 files changed, 2454 insertions, 0 deletions
diff --git a/libjava/classpath/native/plugin/.cvsignore b/libjava/classpath/native/plugin/.cvsignore new file mode 100644 index 000000000..17cbfe80b --- /dev/null +++ b/libjava/classpath/native/plugin/.cvsignore @@ -0,0 +1,6 @@ +Makefile.in +.deps +.libs +libgcjwebplugin_la-gcjwebplugin.lo +libgcjwebplugin.la +Makefile diff --git a/libjava/classpath/native/plugin/Makefile.am b/libjava/classpath/native/plugin/Makefile.am new file mode 100644 index 000000000..28268bf48 --- /dev/null +++ b/libjava/classpath/native/plugin/Makefile.am @@ -0,0 +1,18 @@ +nativeexeclib_LTLIBRARIES = libgcjwebplugin.la + +libgcjwebplugin_la_SOURCES = gcjwebplugin.cc + +libgcjwebplugin_la_CXXFLAGS = \ + -Wall -DAPPLETVIEWER_EXECUTABLE="\"$(bindir)/`echo gappletviewer | sed '$(program_transform_name)'`\"" \ + $(MOZILLA_CFLAGS) $(GLIB_CFLAGS) $(GTK_CFLAGS) + +libgcjwebplugin_la_LDFLAGS = -avoid-version \ + $(GLIB_LIBS) $(GTK_LIBS) \ + -lstdc++ $(AM_LDFLAGS) + +install-plugin: $(nativeexeclib_LTLIBRARIES) + $(INSTALL) -d -m0755 $(DESTDIR)$(PLUGIN_DIR) + $(INSTALL) .libs/libgcjwebplugin.so $(DESTDIR)$(PLUGIN_DIR) + +uninstall-plugin: + rm -f $(DESTDIR)$(PLUGIN_DIR)/libgcjwebplugin.so diff --git a/libjava/classpath/native/plugin/Makefile.in b/libjava/classpath/native/plugin/Makefile.in new file mode 100644 index 000000000..798bc6d12 --- /dev/null +++ b/libjava/classpath/native/plugin/Makefile.in @@ -0,0 +1,627 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +pkgdatadir = $(datadir)/@PACKAGE@ +pkgincludedir = $(includedir)/@PACKAGE@ +pkglibdir = $(libdir)/@PACKAGE@ +pkglibexecdir = $(libexecdir)/@PACKAGE@ +am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd +install_sh_DATA = $(install_sh) -c -m 644 +install_sh_PROGRAM = $(install_sh) -c +install_sh_SCRIPT = $(install_sh) -c +INSTALL_HEADER = $(INSTALL_DATA) +transform = $(program_transform_name) +NORMAL_INSTALL = : +PRE_INSTALL = : +POST_INSTALL = : +NORMAL_UNINSTALL = : +PRE_UNINSTALL = : +POST_UNINSTALL = : +build_triplet = @build@ +host_triplet = @host@ +target_triplet = @target@ +subdir = native/plugin +DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am +ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 +am__aclocal_m4_deps = $(top_srcdir)/../../config/depstand.m4 \ + $(top_srcdir)/../../config/lead-dot.m4 \ + $(top_srcdir)/../../config/lib-ld.m4 \ + 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$(ETAGS_ARGS) \ + $$unique; \ + fi; \ + fi +ctags: CTAGS +CTAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) \ + $(TAGS_FILES) $(LISP) + list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \ + unique=`for i in $$list; do \ + if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \ + done | \ + $(AWK) '{ files[$$0] = 1; nonempty = 1; } \ + END { if (nonempty) { for (i in files) print i; }; }'`; \ + test -z "$(CTAGS_ARGS)$$unique" \ + || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \ + $$unique + +GTAGS: + here=`$(am__cd) $(top_builddir) && pwd` \ + && $(am__cd) $(top_srcdir) \ + && gtags -i $(GTAGS_ARGS) "$$here" + +distclean-tags: + -rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags +check-am: all-am +check: check-am +all-am: Makefile $(LTLIBRARIES) +installdirs: + for dir in "$(DESTDIR)$(nativeexeclibdir)"; do \ + test -z "$$dir" || $(MKDIR_P) "$$dir"; \ + done +install: install-am +install-exec: install-exec-am +install-data: install-data-am +uninstall: uninstall-am + +install-am: all-am + @$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am + +installcheck: installcheck-am +install-strip: + $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ + install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ + `test -z '$(STRIP)' || \ + echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install +mostlyclean-generic: + +clean-generic: + +distclean-generic: + -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES) + -test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES) + +maintainer-clean-generic: + @echo "This command is intended for maintainers to use" + @echo "it deletes files that may require special tools to rebuild." +clean: clean-am + +clean-am: clean-generic clean-libtool clean-nativeexeclibLTLIBRARIES \ + mostlyclean-am + +distclean: distclean-am + -rm -rf ./$(DEPDIR) + -rm -f Makefile +distclean-am: clean-am distclean-compile distclean-generic \ + distclean-tags + +dvi: dvi-am + +dvi-am: + +html: html-am + +html-am: + +info: info-am + +info-am: + +install-data-am: + +install-dvi: install-dvi-am + +install-dvi-am: + +install-exec-am: install-nativeexeclibLTLIBRARIES + +install-html: install-html-am + +install-html-am: + +install-info: install-info-am + +install-info-am: + +install-man: + +install-pdf: install-pdf-am + +install-pdf-am: + +install-ps: install-ps-am + +install-ps-am: + +installcheck-am: + +maintainer-clean: maintainer-clean-am + -rm -rf ./$(DEPDIR) + -rm -f Makefile +maintainer-clean-am: distclean-am maintainer-clean-generic + +mostlyclean: mostlyclean-am + +mostlyclean-am: mostlyclean-compile mostlyclean-generic \ + mostlyclean-libtool + +pdf: pdf-am + +pdf-am: + +ps: ps-am + +ps-am: + +uninstall-am: uninstall-nativeexeclibLTLIBRARIES + +.MAKE: install-am install-strip + +.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \ + clean-libtool clean-nativeexeclibLTLIBRARIES ctags distclean \ + distclean-compile distclean-generic distclean-libtool \ + distclean-tags dvi dvi-am html html-am info info-am install \ + install-am install-data install-data-am install-dvi \ + install-dvi-am install-exec install-exec-am install-html \ + install-html-am install-info install-info-am install-man \ + install-nativeexeclibLTLIBRARIES install-pdf install-pdf-am \ + install-ps install-ps-am install-strip installcheck \ + installcheck-am installdirs maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags uninstall uninstall-am uninstall-nativeexeclibLTLIBRARIES + + +install-plugin: $(nativeexeclib_LTLIBRARIES) + $(INSTALL) -d -m0755 $(DESTDIR)$(PLUGIN_DIR) + $(INSTALL) .libs/libgcjwebplugin.so $(DESTDIR)$(PLUGIN_DIR) + +uninstall-plugin: + rm -f $(DESTDIR)$(PLUGIN_DIR)/libgcjwebplugin.so + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/libjava/classpath/native/plugin/gcjwebplugin.cc b/libjava/classpath/native/plugin/gcjwebplugin.cc new file mode 100644 index 000000000..71cffccb6 --- /dev/null +++ b/libjava/classpath/native/plugin/gcjwebplugin.cc @@ -0,0 +1,1803 @@ +/* gcjwebplugin.cc -- web browser plugin to execute Java applets + Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +// System includes. +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <unistd.h> + +// Netscape plugin API includes. +#include <npapi.h> +#if (((NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR) < 20) +#include <npupp.h> +#else +#include <npfunctions.h> +#endif + +// GLib includes. +#include <glib.h> +#include <glib/gstdio.h> + +// GTK includes. +#include <gtk/gtk.h> + +// gcjwebplugin includes. +#include "config.h" + +// Documentbase retrieval includes. +#include <nsIPluginInstance.h> +#include <nsIPluginInstancePeer.h> +#include <nsIPluginTagInfo2.h> + +// Debugging macros. +#define PLUGIN_DEBUG(message) \ + g_print ("GCJ PLUGIN: thread %p: %s\n", g_thread_self (), message) + +#define PLUGIN_DEBUG_TWO(first, second) \ + g_print ("GCJ PLUGIN: thread %p: %s %s\n", g_thread_self (), \ + first, second) + +// Error reporting macros. +#define PLUGIN_ERROR(message) \ + g_printerr ("%s:%d: thread %p: Error: %s\n", __FILE__, __LINE__, \ + g_thread_self (), message) + +#define PLUGIN_ERROR_TWO(first, second) \ + g_printerr ("%s:%d: thread %p: Error: %s: %s\n", __FILE__, __LINE__, \ + g_thread_self (), first, second) + +#define PLUGIN_ERROR_THREE(first, second, third) \ + g_printerr ("%s:%d: thread %p: Error: %s: %s: %s\n", __FILE__, \ + __LINE__, g_thread_self (), first, second, third) + +// Plugin information passed to about:plugins. +#define PLUGIN_NAME "GCJ Web Browser Plugin" +#define PLUGIN_DESC "The " PLUGIN_NAME " executes Java applets." +#define PLUGIN_MIME_DESC \ + "application/x-java-vm:class,jar:GCJ;" \ + "application/x-java-applet:class,jar:GCJ;" \ + "application/x-java-applet;version=1.1:class,jar:GCJ;" \ + "application/x-java-applet;version=1.1.1:class,jar:GCJ;" \ + "application/x-java-applet;version=1.1.2:class,jar:GCJ;" \ + "application/x-java-applet;version=1.1.3:class,jar:GCJ;" \ + "application/x-java-applet;version=1.2:class,jar:GCJ;" \ + "application/x-java-applet;version=1.2.1:class,jar:GCJ;" \ + "application/x-java-applet;version=1.2.2:class,jar:GCJ;" \ + "application/x-java-applet;version=1.3:class,jar:GCJ;" \ + "application/x-java-applet;version=1.3.1:class,jar:GCJ;" \ + "application/x-java-applet;version=1.4:class,jar:GCJ;" \ + "application/x-java-applet;version=1.4.1:class,jar:GCJ;" \ + "application/x-java-applet;version=1.4.2:class,jar:GCJ;" \ + "application/x-java-applet;jpi-version=1.4.2_01:class,jar:GCJ;" \ + "application/x-java-bean:class,jar:GCJ;" \ + "application/x-java-bean;version=1.1:class,jar:GCJ;" \ + "application/x-java-bean;version=1.1.1:class,jar:GCJ;" \ + "application/x-java-bean;version=1.1.2:class,jar:GCJ;" \ + "application/x-java-bean;version=1.1.3:class,jar:GCJ;" \ + "application/x-java-bean;version=1.2:class,jar:GCJ;" \ + "application/x-java-bean;version=1.2.1:class,jar:GCJ;" \ + "application/x-java-bean;version=1.2.2:class,jar:GCJ;" \ + "application/x-java-bean;version=1.3:class,jar:GCJ;" \ + "application/x-java-bean;version=1.3.1:class,jar:GCJ;" \ + "application/x-java-bean;version=1.4:class,jar:GCJ;" \ + "application/x-java-bean;version=1.4.1:class,jar:GCJ;" \ + "application/x-java-bean;version=1.4.2:class,jar:GCJ;" \ + "application/x-java-bean;jpi-version=1.4.2_01:class,jar:GCJ;" +#define PLUGIN_URL NS_INLINE_PLUGIN_CONTRACTID_PREFIX NS_JVM_MIME_TYPE +#define PLUGIN_MIME_TYPE "application/x-java-vm" +#define PLUGIN_FILE_EXTS "class,jar,zip" +#define PLUGIN_MIME_COUNT 1 + +// Security dialog messages. +#define RESPONSE_TRUST_APPLET "Trust Applet" +#define RESPONSE_TRUST_APPLET_ADD_TO_LIST "Trust Applet and Add to Whitelist" +#define SECURITY_WARNING \ + "%s wants to load an applet.\n" \ + "GNU Classpath's security implementation is not complete.\n" \ + "HOSTILE APPLETS WILL STEAL AND/OR DESTROY YOUR DATA!\n" +#define SECURITY_DESCRIPTION \ + "Click \"Cancel\" if you do not trust the source of this applet.\n" \ + "Click \"Trust Applet\" to load and run this applet now.\n" \ + "Click \"Trust Applet and Add To Whitelist\" to always load" \ + " and run this applet from now on, without asking.\n" \ + "The whitelist is a list of the URLs from which you trust" \ + " applets.\n" \ + "Your whitelist file is \" %s \"." +#define FAILURE_MESSAGE \ + "This page wants to load an applet.\n" \ + "The appletviewer is missing or not installed properly in \"" \ + APPLETVIEWER_EXECUTABLE "\"." + +// Documentbase retrieval required definition. +static NS_DEFINE_IID (kIPluginTagInfo2IID, NS_IPLUGINTAGINFO2_IID); + +// Browser function table. +static NPNetscapeFuncs browserFunctions; + +// Data directory for plugin. +static gchar* data_directory; + +// Whitelist filename +static gchar* whitelist_filename; + +// Keeps track of initialization. NP_Initialize should only be +// called once. +gboolean initialized = false; + +// GCJPluginData stores all the data associated with a single plugin +// instance. A separate plugin instance is created for each <APPLET> +// tag. For now, each plugin instance spawns its own applet viewer +// process but this may need to change if we find pages containing +// multiple applets that expect to be running in the same VM. +struct GCJPluginData +{ + // A unique identifier for this plugin window. + gchar* instance_string; + // Applet viewer input pipe name. + gchar* in_pipe_name; + // Applet viewer input channel. + GIOChannel* in_from_appletviewer; + // Applet viewer input watch source. + gint in_watch_source; + // Applet viewer output pipe name. + gchar* out_pipe_name; + // Applet viewer output channel. + GIOChannel* out_to_appletviewer; + // Applet viewer output watch source. + gint out_watch_source; + // Mutex to protect appletviewer_alive. + GMutex* appletviewer_mutex; + // Back-pointer to the plugin instance to which this data belongs. + // This should not be freed but instead simply set to NULL. + NPP owner; + // FALSE if the applet viewer process has died. All code + // communicating with the applet viewer should check this flag + // before attempting to read from/write to the applet viewer pipes. + gboolean appletviewer_alive; + // The address of the plugin window. This should not be freed but + // instead simply set to NULL. + gpointer window_handle; + // The last plugin window width sent to us by the browser. + guint32 window_width; + // The last plugin window height sent to us by the browser. + guint32 window_height; +}; + +// Documentbase retrieval type-punning union. +typedef union +{ + void** void_field; + nsIPluginTagInfo2** info_field; +} info_union; + +// Static instance helper functions. +// Have the browser allocate a new GCJPluginData structure. +static void plugin_data_new (GCJPluginData** data); +// Documentbase retrieval. +static gchar* plugin_get_documentbase (NPP instance); +// plugin failure handling. +static bool plugin_failed (); +// Whitelist handling. +static bool plugin_user_trusts_documentbase (char* documentbase); +static bool plugin_ask_user_about_documentbase (char* documentbase); +static void plugin_add_documentbase_to_whitelist (char* documentbase); +// Callback used to monitor input pipe status. +static gboolean plugin_in_pipe_callback (GIOChannel* source, + GIOCondition condition, + gpointer plugin_data); +// Callback used to monitor output pipe status. +static gboolean plugin_out_pipe_callback (GIOChannel* source, + GIOCondition condition, + gpointer plugin_data); +static NPError plugin_start_appletviewer (GCJPluginData* data); +static gchar* plugin_create_applet_tag (int16 argc, char* argn[], + char* argv[]); +static void plugin_send_message_to_appletviewer (GCJPluginData* data, + gchar const* message); +static void plugin_stop_appletviewer (GCJPluginData* data); +// Uninitialize GCJPluginData structure and delete pipes. +static void plugin_data_destroy (GCJPluginData** data); + +// Global instance counter. +// Mutex to protect plugin_instance_counter. +static GMutex* plugin_instance_mutex = NULL; +// A counter used to create uniquely named pipes. +static gulong plugin_instance_counter = 0; +// The user's documentbase whitelist. +static GIOChannel* whitelist_file = NULL; +// A global variable for reporting GLib errors. This must be free'd +// and set to NULL after each use. +static GError* channel_error = NULL; + +// Functions prefixed by GCJ_ are instance functions. They are called +// by the browser and operate on instances of GCJPluginData. +// Functions prefixed by plugin_ are static helper functions. +// Functions prefixed by NP_ are factory functions. They are called +// by the browser and provide functionality needed to create plugin +// instances. + +// INSTANCE FUNCTIONS + +// Creates a new gcjwebplugin instance. This function creates a +// GCJPluginData* and stores it in instance->pdata. The following +// GCJPluginData fiels are initialized: instance_string, in_pipe_name, +// in_from_appletviewer, in_watch_source, out_pipe_name, +// out_to_appletviewer, out_watch_source, appletviewer_mutex, owner, +// appletviewer_alive. In addition two pipe files are created. All +// of those fields must be properly destroyed, and the pipes deleted, +// by GCJ_Destroy. If an error occurs during initialization then this +// function will free anything that's been allocated so far, set +// instance->pdata to NULL and return an error code. +NPError +GCJ_New (NPMIMEType pluginType, NPP instance, uint16 mode, + int16 argc, char* argn[], char* argv[], + NPSavedData* saved) +{ + PLUGIN_DEBUG ("GCJ_New"); + + NPError np_error = NPERR_NO_ERROR; + GCJPluginData* data = NULL; + + gchar* documentbase = NULL; + gchar* read_message = NULL; + gchar* applet_tag = NULL; + gchar* tag_message = NULL; + + if (!instance) + { + PLUGIN_ERROR ("Browser-provided instance pointer is NULL."); + np_error = NPERR_INVALID_INSTANCE_ERROR; + goto cleanup_done; + } + + // data + plugin_data_new (&data); + if (data == NULL) + { + PLUGIN_ERROR ("Failed to allocate plugin data."); + np_error = NPERR_OUT_OF_MEMORY_ERROR; + goto cleanup_done; + } + + // Initialize data->instance_string. + // + // instance_string should be unique for this process so we use a + // combination of getpid and plugin_instance_counter. + // + // Critical region. Reference and increment plugin_instance_counter + // global. + g_mutex_lock (plugin_instance_mutex); + + // data->instance_string + data->instance_string = g_strdup_printf ("instance-%d-%ld", + getpid (), + plugin_instance_counter++); + + g_mutex_unlock (plugin_instance_mutex); + + // data->appletviewer_mutex + data->appletviewer_mutex = g_mutex_new (); + + // Documentbase retrieval. + documentbase = plugin_get_documentbase (instance); + if (!documentbase) + { + PLUGIN_ERROR ("Documentbase retrieval failed." + " Browser not Mozilla-based?"); + goto cleanup_appletviewer_mutex; + } + + // Open the user's documentbase whitelist. + whitelist_file = g_io_channel_new_file (whitelist_filename, + "a+", &channel_error); + if (!whitelist_file) + { + if (channel_error) + { + PLUGIN_ERROR_THREE ("Failed to open whitelist file", + whitelist_filename, + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR_TWO ("Failed to open whitelist file", + whitelist_filename); + + return NPERR_GENERIC_ERROR; + } + + if (!plugin_user_trusts_documentbase (documentbase)) + { + PLUGIN_ERROR ("User does not trust applet."); + np_error = NPERR_GENERIC_ERROR; + goto cleanup_appletviewer_mutex; + } + + // Create appletviewer-to-plugin pipe which we refer to as the input + // pipe. + + // data->in_pipe_name + data->in_pipe_name = g_strdup_printf ("%s/gcj-%s-appletviewer-to-plugin", + data_directory, data->instance_string); + if (!data->in_pipe_name) + { + PLUGIN_ERROR ("Failed to create input pipe name."); + np_error = NPERR_OUT_OF_MEMORY_ERROR; + // If data->in_pipe_name is NULL then the g_free at + // cleanup_in_pipe_name will simply return. + goto cleanup_in_pipe_name; + } + + if (mkfifo (data->in_pipe_name, 0700) == -1 && errno != EEXIST) + { + PLUGIN_ERROR_TWO ("Failed to create input pipe", strerror (errno)); + np_error = NPERR_GENERIC_ERROR; + goto cleanup_in_pipe_name; + } + + // Create plugin-to-appletviewer pipe which we refer to as the + // output pipe. + + // data->out_pipe_name + data->out_pipe_name = g_strdup_printf ("%s/gcj-%s-plugin-to-appletviewer", + data_directory, data->instance_string); + + if (!data->out_pipe_name) + { + PLUGIN_ERROR ("Failed to create output pipe name."); + np_error = NPERR_OUT_OF_MEMORY_ERROR; + goto cleanup_out_pipe_name; + } + + if (mkfifo (data->out_pipe_name, 0700) == -1 && errno != EEXIST) + { + PLUGIN_ERROR_TWO ("Failed to create output pipe", strerror (errno)); + np_error = NPERR_GENERIC_ERROR; + goto cleanup_out_pipe_name; + } + + // Start a separate appletviewer process for each applet, even if + // there are multiple applets in the same page. We may need to + // change this behaviour if we find pages with multiple applets that + // rely on being run in the same VM. + + // Critical region. Hold appletviewer_mutex while we start the + // appletviewer, create the IO channels and install the channel + // watch callbacks. + g_mutex_lock (data->appletviewer_mutex); + + np_error = plugin_start_appletviewer (data); + + // If the appletviewer is not installed, then a dialog box will + // show up and the plugin will be killed. + if (np_error != NPERR_NO_ERROR) + { + if (plugin_failed ()) + goto cleanup_applet_failure; + } + + // Create plugin-to-appletviewer channel. The default encoding for + // the file is UTF-8. + // data->out_to_appletviewer + data->out_to_appletviewer = g_io_channel_new_file (data->out_pipe_name, + "w", &channel_error); + if (!data->out_to_appletviewer) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to create output channel", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to create output channel"); + + np_error = NPERR_GENERIC_ERROR; + goto cleanup_out_to_appletviewer; + } + + // Watch for hangup and error signals on the output pipe. + data->out_watch_source = + g_io_add_watch (data->out_to_appletviewer, + (GIOCondition) (G_IO_ERR | G_IO_HUP), + plugin_out_pipe_callback, (gpointer) data); + + // Create appletviewer-to-plugin channel. The default encoding for + // the file is UTF-8. + // data->in_from_appletviewer + data->in_from_appletviewer = g_io_channel_new_file (data->in_pipe_name, + "r", &channel_error); + if (!data->in_from_appletviewer) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to create input channel", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to create input channel"); + + np_error = NPERR_GENERIC_ERROR; + goto cleanup_in_from_appletviewer; + } + + // Watch for hangup and error signals on the input pipe. + data->in_watch_source = + g_io_add_watch (data->in_from_appletviewer, + (GIOCondition) (G_IO_IN | G_IO_ERR | G_IO_HUP), + plugin_in_pipe_callback, (gpointer) data); + + // Wait until we receive confirmation that the appletviewer has + // started. + if (g_io_channel_read_line (data->in_from_appletviewer, + &read_message, NULL, NULL, + &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Receiving confirmation from appletviewer failed", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Receiving confirmation from appletviewer failed"); + + np_error = NPERR_GENERIC_ERROR; + goto cleanup_in_watch_source; + } + + PLUGIN_DEBUG ("GCJ_New: got confirmation that appletviewer is running."); + data->appletviewer_alive = TRUE; + + // Send applet tag message to appletviewer. + applet_tag = plugin_create_applet_tag (argc, argn, argv); + tag_message = g_strconcat ("tag ", documentbase, " ", applet_tag, NULL); + + plugin_send_message_to_appletviewer (data, data->instance_string); + plugin_send_message_to_appletviewer (data, tag_message); + + g_mutex_unlock (data->appletviewer_mutex); + + // If initialization succeeded entirely then we store the plugin + // data in the instance structure and return. Otherwise we free the + // data we've allocated so far and set instance->pdata to NULL. + + // Set back-pointer to owner instance. + data->owner = instance; + instance->pdata = data; + goto cleanup_done; + + // An error occurred while initializing the plugin data or spawning + // the appletviewer so we free the data we've already allocated. + + cleanup_in_watch_source: + // Removing a source is harmless if it fails since it just means the + // source has already been removed. + g_source_remove (data->in_watch_source); + data->in_watch_source = 0; + + cleanup_in_from_appletviewer: + if (data->in_from_appletviewer) + g_io_channel_unref (data->in_from_appletviewer); + data->in_from_appletviewer = NULL; + + // cleanup_out_watch_source: + g_source_remove (data->out_watch_source); + data->out_watch_source = 0; + + cleanup_out_to_appletviewer: + if (data->out_to_appletviewer) + g_io_channel_unref (data->out_to_appletviewer); + data->out_to_appletviewer = NULL; + + // cleanup_out_pipe: + // Delete output pipe. + unlink (data->out_pipe_name); + + cleanup_applet_failure: + cleanup_out_pipe_name: + g_free (data->out_pipe_name); + data->out_pipe_name = NULL; + + // cleanup_in_pipe: + // Delete input pipe. + unlink (data->in_pipe_name); + + cleanup_in_pipe_name: + g_free (data->in_pipe_name); + data->in_pipe_name = NULL; + + cleanup_appletviewer_mutex: + g_free (data->appletviewer_mutex); + data->appletviewer_mutex = NULL; + + // cleanup_instance_string: + g_free (data->instance_string); + data->instance_string = NULL; + + // cleanup_data: + // Eliminate back-pointer to plugin instance. + data->owner = NULL; + (*browserFunctions.memfree) (data); + data = NULL; + + // Initialization failed so return a NULL pointer for the browser + // data. + instance->pdata = NULL; + + cleanup_done: + g_free (tag_message); + tag_message = NULL; + g_free (applet_tag); + applet_tag = NULL; + g_free (read_message); + read_message = NULL; + g_free (documentbase); + documentbase = NULL; + + PLUGIN_DEBUG ("GCJ_New return"); + + return np_error; +} + +NPError +GCJ_GetValue (NPP instance, NPPVariable variable, void* value) +{ + PLUGIN_DEBUG ("GCJ_GetValue"); + + NPError np_error = NPERR_NO_ERROR; + + switch (variable) + { + // This plugin needs XEmbed support. + case NPPVpluginNeedsXEmbed: + { + PLUGIN_DEBUG ("GCJ_GetValue: returning TRUE for NeedsXEmbed."); + PRBool* bool_value = (PRBool*) value; + *bool_value = PR_TRUE; + } + break; + + default: + PLUGIN_ERROR ("Unknown plugin value requested."); + np_error = NPERR_GENERIC_ERROR; + break; + } + + PLUGIN_DEBUG ("GCJ_GetValue return"); + + return np_error; +} + +NPError +GCJ_Destroy (NPP instance, NPSavedData** save) +{ + PLUGIN_DEBUG ("GCJ_Destroy"); + + GCJPluginData* data = (GCJPluginData*) instance->pdata; + + if (data) + { + // Critical region. Stop the appletviewer. + g_mutex_lock (data->appletviewer_mutex); + + // Tell the appletviewer to destroy its embedded plugin window. + plugin_send_message_to_appletviewer (data, "destroy"); + // Shut down the appletviewer. + plugin_stop_appletviewer (data); + + g_mutex_unlock (data->appletviewer_mutex); + + // Free plugin data. + plugin_data_destroy (&data); + } + + PLUGIN_DEBUG ("GCJ_Destroy return"); + + return NPERR_NO_ERROR; +} + +NPError +GCJ_SetWindow (NPP instance, NPWindow* window) +{ + PLUGIN_DEBUG ("GCJ_SetWindow"); + + if (instance == NULL) + { + PLUGIN_ERROR ("Invalid instance."); + + return NPERR_INVALID_INSTANCE_ERROR; + } + + GCJPluginData* data = (GCJPluginData*) instance->pdata; + + // Simply return if we receive a NULL window. + if ((window == NULL) || (window->window == NULL)) + { + PLUGIN_DEBUG ("GCJ_SetWindow: got NULL window."); + + return NPERR_NO_ERROR; + } + + if (data->window_handle) + { + // The window already exists. + if (data->window_handle == window->window) + { + // The parent window is the same as in previous calls. + PLUGIN_DEBUG ("GCJ_SetWindow: window already exists."); + + // Critical region. Read data->appletviewer_mutex and send + // a message to the appletviewer. + g_mutex_lock (data->appletviewer_mutex); + + if (data->appletviewer_alive) + { + // The window is the same as it was for the last + // SetWindow call. + if (window->width != data->window_width) + { + PLUGIN_DEBUG ("GCJ_SetWindow: window width changed."); + // The width of the plugin window has changed. + + // Send the new width to the appletviewer. + plugin_send_message_to_appletviewer (data, + data->instance_string); + gchar* width_message = g_strdup_printf ("width %d", + window->width); + plugin_send_message_to_appletviewer (data, width_message); + g_free (width_message); + width_message = NULL; + + // Store the new width. + data->window_width = window->width; + } + + if (window->height != data->window_height) + { + PLUGIN_DEBUG ("GCJ_SetWindow: window height changed."); + // The height of the plugin window has changed. + + // Send the new height to the appletviewer. + plugin_send_message_to_appletviewer (data, + data->instance_string); + gchar* height_message = g_strdup_printf ("height %d", + window->height); + plugin_send_message_to_appletviewer (data, height_message); + g_free (height_message); + height_message = NULL; + + // Store the new height. + data->window_height = window->height; + } + } + else + { + // The appletviewer is not running. + PLUGIN_DEBUG ("GCJ_SetWindow: appletviewer is not running."); + } + + g_mutex_unlock (data->appletviewer_mutex); + } + else + { + // The parent window has changed. This branch does run but + // doing nothing in response seems to be sufficient. + PLUGIN_DEBUG ("GCJ_SetWindow: parent window changed."); + } + } + else + { + PLUGIN_DEBUG ("GCJ_SetWindow: setting window."); + + // Critical region. Send messages to appletviewer. + g_mutex_lock (data->appletviewer_mutex); + + plugin_send_message_to_appletviewer (data, data->instance_string); + gchar *window_message = g_strdup_printf ("handle %ld", + (gulong) window->window); + plugin_send_message_to_appletviewer (data, window_message); + g_free (window_message); + window_message = NULL; + + g_mutex_unlock (data->appletviewer_mutex); + + // Store the window handle. + data->window_handle = window->window; + } + + PLUGIN_DEBUG ("GCJ_SetWindow return"); + + return NPERR_NO_ERROR; +} + +NPError +GCJ_NewStream (NPP instance, NPMIMEType type, NPStream* stream, + NPBool seekable, uint16* stype) +{ + PLUGIN_DEBUG ("GCJ_NewStream"); + + PLUGIN_DEBUG ("GCJ_NewStream return"); + + return NPERR_NO_ERROR; +} + +void +GCJ_StreamAsFile (NPP instance, NPStream* stream, const char* filename) +{ + PLUGIN_DEBUG ("GCJ_StreamAsFile"); + + PLUGIN_DEBUG ("GCJ_StreamAsFile return"); +} + +NPError +GCJ_DestroyStream (NPP instance, NPStream* stream, NPReason reason) +{ + PLUGIN_DEBUG ("GCJ_DestroyStream"); + + PLUGIN_DEBUG ("GCJ_DestroyStream return"); + + return NPERR_NO_ERROR; +} + +int32 +GCJ_WriteReady (NPP instance, NPStream* stream) +{ + PLUGIN_DEBUG ("GCJ_WriteReady"); + + PLUGIN_DEBUG ("GCJ_WriteReady return"); + + return 0; +} + +int32 +GCJ_Write (NPP instance, NPStream* stream, int32 offset, int32 len, + void* buffer) +{ + PLUGIN_DEBUG ("GCJ_Write"); + + PLUGIN_DEBUG ("GCJ_Write return"); + + return 0; +} + +void +GCJ_Print (NPP instance, NPPrint* platformPrint) +{ + PLUGIN_DEBUG ("GCJ_Print"); + + PLUGIN_DEBUG ("GCJ_Print return"); +} + +int16 +GCJ_HandleEvent (NPP instance, void* event) +{ + PLUGIN_DEBUG ("GCJ_HandleEvent"); + + PLUGIN_DEBUG ("GCJ_HandleEvent return"); + + return 0; +} + +void +GCJ_URLNotify (NPP instance, const char* url, NPReason reason, + void* notifyData) +{ + PLUGIN_DEBUG ("GCJ_URLNotify"); + + PLUGIN_DEBUG ("GCJ_URLNotify return"); +} + +#if (((NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR) < 20) +jref +#else +void* +#endif +GCJ_GetJavaClass (void) +{ + PLUGIN_DEBUG ("GCJ_GetJavaClass"); + + PLUGIN_DEBUG ("GCJ_GetJavaClass return"); + + return 0; +} + +// HELPER FUNCTIONS + +static void +plugin_data_new (GCJPluginData** data) +{ + PLUGIN_DEBUG ("plugin_data_new"); + + *data = (GCJPluginData*) + (*browserFunctions.memalloc) (sizeof (struct GCJPluginData)); + + // appletviewer_alive is false until the applet viewer is spawned. + if (*data) + memset (*data, 0, sizeof (struct GCJPluginData)); + + PLUGIN_DEBUG ("plugin_data_new return"); +} + +// Documentbase retrieval. This function gets the current document's +// documentbase. This function relies on browser-private data so it +// will only work when the plugin is loaded in a Mozilla-based +// browser. We could not find a way to retrieve the documentbase +// using the original Netscape plugin API so we use the XPCOM API +// instead. +static gchar* +plugin_get_documentbase (NPP instance) +{ + PLUGIN_DEBUG ("plugin_get_documentbase"); + + nsIPluginInstance* xpcom_instance = NULL; + nsIPluginInstancePeer* peer = NULL; + nsresult result = 0; + nsIPluginTagInfo2* pluginTagInfo2 = NULL; + info_union u = { NULL }; + char const* documentbase = NULL; + gchar* documentbase_copy = NULL; + + xpcom_instance = (nsIPluginInstance*) (instance->ndata); + if (!xpcom_instance) + { + PLUGIN_ERROR ("xpcom_instance is NULL."); + goto cleanup_done; + } + + xpcom_instance->GetPeer (&peer); + if (!peer) + { + PLUGIN_ERROR ("peer is NULL."); + goto cleanup_done; + } + + u.info_field = &pluginTagInfo2; + + result = peer->QueryInterface (kIPluginTagInfo2IID, + u.void_field); + if (result || !pluginTagInfo2) + { + PLUGIN_ERROR ("pluginTagInfo2 retrieval failed."); + goto cleanup_peer; + } + + pluginTagInfo2->GetDocumentBase (&documentbase); + + if (!documentbase) + { + PLUGIN_ERROR ("documentbase is NULL."); + goto cleanup_plugintaginfo2; + } + + documentbase_copy = g_strdup (documentbase); + + // Release references. + cleanup_plugintaginfo2: + NS_RELEASE (pluginTagInfo2); + + cleanup_peer: + NS_RELEASE (peer); + + cleanup_done: + PLUGIN_DEBUG ("plugin_get_documentbase return"); + + return documentbase_copy; +} + +// This function shows a error message if the appletviewer has +// not been installed. It returns true, if the user presses the +// ok button. +static bool +plugin_failed () +{ + GtkWidget* dialog = NULL; + GtkWidget* ok_button = NULL; + + dialog = gtk_message_dialog_new (NULL, + GTK_DIALOG_MODAL, + GTK_MESSAGE_WARNING, + GTK_BUTTONS_NONE, + FAILURE_MESSAGE); + ok_button = gtk_dialog_add_button (GTK_DIALOG (dialog), + GTK_STOCK_OK, + GTK_RESPONSE_OK); + gtk_widget_show_all (dialog); + if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_OK) + { + gtk_widget_destroy (dialog); + return true; + } + return false; +} + +// plugin_user_trusts_documentbase returns true if the given +// documentbase is in the documentbase whitelist. Otherwise it asks +// the user if he trusts the given documentbase by calling +// plugin_ask_user_about_documentbase. +static bool +plugin_user_trusts_documentbase (char* documentbase) +{ + bool applet_in_whitelist = false; + + // Check if documentbase is in whitelist. + while (true) + { + gchar* whitelist_entry = NULL; + gchar* newline_documentbase = NULL; + + // If reading fails, break out of this loop with + // applet_in_whitelist still set to false. + if (g_io_channel_read_line (whitelist_file, &whitelist_entry, + NULL, NULL, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to read line from whitelist file", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to read line from whitelist file."); + g_free (whitelist_entry); + whitelist_entry = NULL; + break; + } + + newline_documentbase = g_strdup_printf ("%s\n", documentbase); + if (!strcmp (newline_documentbase, whitelist_entry)) + { + applet_in_whitelist = true; + g_free (newline_documentbase); + newline_documentbase = NULL; + g_free (whitelist_entry); + whitelist_entry = NULL; + break; + } + g_free (whitelist_entry); + whitelist_entry = NULL; + g_free (newline_documentbase); + newline_documentbase = NULL; + } + + return applet_in_whitelist ? true + : plugin_ask_user_about_documentbase (documentbase); +} + +// plugin_add_documentbase_to_whitelist adds the given documentbase to +// the user's documentbase whitelist. +static void +plugin_add_documentbase_to_whitelist (char* documentbase) +{ + gsize bytes_written = 0; + char* newline_documentbase = NULL; + GIOStatus status = G_IO_STATUS_NORMAL; + + newline_documentbase = g_strdup_printf ("%s\n", documentbase); + status = g_io_channel_write_chars (whitelist_file, + newline_documentbase, -1, &bytes_written, + &channel_error); + g_free (newline_documentbase); + newline_documentbase = NULL; + + if (status != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Error writing to whitelist file", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Error writing to whitelist file."); + } + + if (g_io_channel_flush (whitelist_file, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to write whitelist file", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to write whitelist file."); + } + + if (g_io_channel_shutdown (whitelist_file, TRUE, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to close whitelist file", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to close whitelist file."); + } +} + +// plugin_ask_user_about_documentbase puts up a dialog box that asks if the +// user trusts applets from this documentbase. The user has three +// options: "Cancel", "Trust Applet" and "Trust Applet and Add to +// Whitelist". If the user selects Cancel (the default) then a +// generic error code is returned from GCJ_New, telling the browser +// that the applet failed to load. If the user selects "Trust Applet" +// then plugin loading proceeds. If the user selects "Trust Applet +// and Add to Whitelist" then this documentbase is added to the user's +// applet whitelist and plugin loading proceeds. +static bool +plugin_ask_user_about_documentbase (char* documentbase) +{ + GtkWidget* dialog = NULL; + GtkWidget* ok_button = NULL; + GtkWidget* cancel_button = NULL; + GtkWidget* whitelist_button = NULL; + gint dialog_response = GTK_RESPONSE_NONE; + + dialog = gtk_message_dialog_new (NULL, + GTK_DIALOG_MODAL, + GTK_MESSAGE_WARNING, + GTK_BUTTONS_NONE, + SECURITY_WARNING, + documentbase); + gtk_message_dialog_format_secondary_text (GTK_MESSAGE_DIALOG (dialog), + SECURITY_DESCRIPTION, whitelist_filename); + + cancel_button = gtk_dialog_add_button (GTK_DIALOG (dialog), + GTK_STOCK_CANCEL, + GTK_RESPONSE_CANCEL); + ok_button = gtk_dialog_add_button (GTK_DIALOG (dialog), + RESPONSE_TRUST_APPLET, + GTK_RESPONSE_OK); + whitelist_button = gtk_dialog_add_button (GTK_DIALOG (dialog), + RESPONSE_TRUST_APPLET_ADD_TO_LIST, + GTK_RESPONSE_APPLY); + gtk_widget_grab_focus (cancel_button); + + gtk_widget_show_all (dialog); + dialog_response = gtk_dialog_run (GTK_DIALOG (dialog)); + gtk_widget_destroy (dialog); + if (dialog_response == GTK_RESPONSE_CANCEL) + { + // The user does not trust this documentbase. + return false; + } + else if (dialog_response == GTK_RESPONSE_APPLY) + { + // The user wants this documentbase added to his documentbase + // whitelist. + plugin_add_documentbase_to_whitelist (documentbase); + } + // The user trusts this documentbase. + return true; +} + +// plugin_in_pipe_callback is called when data is available on the +// input pipe, or when the appletviewer crashes or is killed. It may +// be called after data has been destroyed in which case it simply +// returns FALSE to remove itself from the glib main loop. +static gboolean +plugin_in_pipe_callback (GIOChannel* source, + GIOCondition condition, + gpointer plugin_data) +{ + PLUGIN_DEBUG ("plugin_in_pipe_callback"); + + GCJPluginData* data = (GCJPluginData*) plugin_data; + gboolean keep_installed = TRUE; + + // If data is NULL then GCJ_Destroy has already been called and + // plugin_in_pipe_callback is being called after plugin + // destruction. In that case all we need to do is return FALSE so + // that the plugin_in_pipe_callback watch is removed. + if (data) + { + // Critical region. Set or clear data->appletviewer_alive. + g_mutex_lock (data->appletviewer_mutex); + + if (condition & G_IO_IN) + { + gchar* message = NULL; + + if (g_io_channel_read_line (data->in_from_appletviewer, + &message, NULL, NULL, + &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to read line from input channel", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to read line from input channel"); + } + else + { + if (g_str_has_prefix (message, "url ")) + { + gchar** parts = g_strsplit (message, " ", 3); + PLUGIN_DEBUG_TWO ("plugin_in_pipe_callback:" + " opening URL", parts[1]); + PLUGIN_DEBUG_TWO ("plugin_in_pipe_callback:" + " URL target", parts[2]); + // Open the URL in a new browser window. + NPError np_error = + (*browserFunctions.geturl) (data->owner, parts[1], parts[2]); + if (np_error != NPERR_NO_ERROR) + PLUGIN_ERROR ("Failed to load URL."); + g_strfreev (parts); + parts = NULL; + } + else if (g_str_has_prefix (message, "status ")) + { + gchar** parts = g_strsplit (message, " ", 2); + + PLUGIN_DEBUG_TWO ("plugin_in_pipe_callback:" + " setting status", parts[1]); + (*browserFunctions.status) (data->owner, parts[1]); + g_strfreev (parts); + parts = NULL; + } + g_print (" PIPE: plugin read %s\n", message); + } + + g_free (message); + message = NULL; + + keep_installed = TRUE; + } + + if (condition & (G_IO_ERR | G_IO_HUP)) + { + PLUGIN_DEBUG ("appletviewer has stopped."); + data->appletviewer_alive = FALSE; + keep_installed = FALSE; + } + g_mutex_unlock (data->appletviewer_mutex); + } + + PLUGIN_DEBUG ("plugin_in_pipe_callback return"); + + return keep_installed; +} + +// plugin_out_pipe_callback is called when the appletviewer crashes or +// is killed. It may be called after data has been destroyed in which +// case it simply returns FALSE to remove itself from the glib main +// loop. +static gboolean +plugin_out_pipe_callback (GIOChannel* source, + GIOCondition condition, + gpointer plugin_data) +{ + PLUGIN_DEBUG ("plugin_out_pipe_callback"); + + GCJPluginData* data = (GCJPluginData*) plugin_data; + + // If data is NULL then GCJ_Destroy has already been called and + // plugin_out_pipe_callback is being called after plugin + // destruction. In that case all we need to do is return FALSE so + // that the plugin_out_pipe_callback watch is removed. + if (data) + { + // Critical region. Clear data->appletviewer_alive. + g_mutex_lock (data->appletviewer_mutex); + + PLUGIN_DEBUG ("plugin_out_pipe_callback: appletviewer has stopped."); + data->appletviewer_alive = FALSE; + + g_mutex_unlock (data->appletviewer_mutex); + } + + PLUGIN_DEBUG ("plugin_out_pipe_callback return"); + + return FALSE; +} + +static NPError +plugin_start_appletviewer (GCJPluginData* data) +{ + PLUGIN_DEBUG ("plugin_start_appletviewer"); + NPError error = NPERR_NO_ERROR; + + if (!data->appletviewer_alive) + { + gchar* command_line[3] = { NULL, NULL, NULL }; + + command_line[0] = g_strdup (APPLETVIEWER_EXECUTABLE); + // Output from plugin's perspective is appletviewer's input. + // Input from plugin's perspective is appletviewer's output. + command_line[1] = g_strdup_printf ("--plugin=%s,%s", + data->out_pipe_name, + data->in_pipe_name); + command_line[2] = NULL; + + if (!g_spawn_async (NULL, command_line, NULL, (GSpawnFlags) 0, + NULL, NULL, NULL, &channel_error)) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to spawn applet viewer", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to spawn applet viewer"); + error = NPERR_GENERIC_ERROR; + goto cleanup; + } + + cleanup: + g_free (command_line[0]); + command_line[0] = NULL; + g_free (command_line[1]); + command_line[1] = NULL; + g_free (command_line[2]); + command_line[2] = NULL; + } + + PLUGIN_DEBUG ("plugin_start_appletviewer return"); + return error; +} + +// Build up the applet tag string that we'll send to the applet +// viewer. +static gchar* +plugin_create_applet_tag (int16 argc, char* argn[], char* argv[]) +{ + PLUGIN_DEBUG ("plugin_create_applet_tag"); + + gchar* applet_tag = g_strdup ("<EMBED "); + gchar* parameters = g_strdup (""); + + for (int16 i = 0; i < argc; i++) + { + if (!g_ascii_strcasecmp (argn[i], "code")) + { + gchar* code = g_strdup_printf ("CODE=\"%s\" ", argv[i]); + applet_tag = g_strconcat (applet_tag, code, NULL); + g_free (code); + code = NULL; + } + else if (!g_ascii_strcasecmp (argn[i], "codebase")) + { + gchar* codebase = g_strdup_printf ("CODEBASE=\"%s\" ", argv[i]); + applet_tag = g_strconcat (applet_tag, codebase, NULL); + g_free (codebase); + codebase = NULL; + } + else if (!g_ascii_strcasecmp (argn[i], "archive")) + { + gchar* archive = g_strdup_printf ("ARCHIVE=\"%s\" ", argv[i]); + applet_tag = g_strconcat (applet_tag, archive, NULL); + g_free (archive); + archive = NULL; + } + else if (!g_ascii_strcasecmp (argn[i], "width")) + { + gchar* width = g_strdup_printf ("WIDTH=\"%s\" ", argv[i]); + applet_tag = g_strconcat (applet_tag, width, NULL); + g_free (width); + width = NULL; + } + else if (!g_ascii_strcasecmp (argn[i], "height")) + { + gchar* height = g_strdup_printf ("HEIGHT=\"%s\" ", argv[i]); + applet_tag = g_strconcat (applet_tag, height, NULL); + g_free (height); + height = NULL; + } + else + { + // Escape the parameter value so that line termination + // characters will pass through the pipe. + if (argv[i] != '\0') + { + gchar* escaped = NULL; + + escaped = g_strescape (argv[i], NULL); + parameters = g_strconcat (parameters, "<PARAM NAME=\"", argn[i], + "\" VALUE=\"", escaped, "\">", NULL); + + g_free (escaped); + escaped = NULL; + } + } + } + + applet_tag = g_strconcat (applet_tag, ">", parameters, "</EMBED>", NULL); + + g_free (parameters); + parameters = NULL; + + PLUGIN_DEBUG ("plugin_create_applet_tag return"); + + return applet_tag; +} + +// plugin_send_message_to_appletviewer must be called while holding +// data->appletviewer_mutex. +static void +plugin_send_message_to_appletviewer (GCJPluginData* data, gchar const* message) +{ + PLUGIN_DEBUG ("plugin_send_message_to_appletviewer"); + + if (data->appletviewer_alive) + { + gchar* newline_message = NULL; + gsize bytes_written = 0; + + // Send message to appletviewer. + newline_message = g_strdup_printf ("%s\n", message); + + // g_io_channel_write_chars will return something other than + // G_IO_STATUS_NORMAL if not all the data is written. In that + // case we fail rather than retrying. + if (g_io_channel_write_chars (data->out_to_appletviewer, + newline_message, -1, &bytes_written, + &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to write bytes to output channel", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to write bytes to output channel"); + } + + if (g_io_channel_flush (data->out_to_appletviewer, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to flush bytes to output channel", + channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to flush bytes to output channel"); + } + g_free (newline_message); + newline_message = NULL; + + g_print (" PIPE: plugin wrote %s\n", message); + } + + PLUGIN_DEBUG ("plugin_send_message_to_appletviewer return"); +} + +// Stop the appletviewer process. When this is called the +// appletviewer can be in any of three states: running, crashed or +// hung. If the appletviewer is running then sending it "shutdown" +// will cause it to exit. This will cause +// plugin_out_pipe_callback/plugin_in_pipe_callback to be called and +// the input and output channels to be shut down. If the appletviewer +// has crashed then plugin_out_pipe_callback/plugin_in_pipe_callback +// would already have been called and data->appletviewer_alive cleared +// in which case this function simply returns. If the appletviewer is +// hung then this function will be successful and the input and output +// watches will be removed by plugin_data_destroy. +// plugin_stop_appletviewer must be called with +// data->appletviewer_mutex held. +static void +plugin_stop_appletviewer (GCJPluginData* data) +{ + PLUGIN_DEBUG ("plugin_stop_appletviewer"); + + if (data->appletviewer_alive) + { + // Shut down the appletviewer. + gsize bytes_written = 0; + + if (data->out_to_appletviewer) + { + if (g_io_channel_write_chars (data->out_to_appletviewer, "shutdown", + -1, &bytes_written, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to write shutdown message to" + " appletviewer", channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to write shutdown message to"); + } + + if (g_io_channel_flush (data->out_to_appletviewer, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to write shutdown message to" + " appletviewer", channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to write shutdown message to"); + } + + if (g_io_channel_shutdown (data->out_to_appletviewer, + TRUE, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to shut down appletviewer" + " output channel", channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to shut down appletviewer"); + } + } + + if (data->in_from_appletviewer) + { + if (g_io_channel_shutdown (data->in_from_appletviewer, + TRUE, &channel_error) + != G_IO_STATUS_NORMAL) + { + if (channel_error) + { + PLUGIN_ERROR_TWO ("Failed to shut down appletviewer" + " input channel", channel_error->message); + g_error_free (channel_error); + channel_error = NULL; + } + else + PLUGIN_ERROR ("Failed to shut down appletviewer"); + } + } + } + + PLUGIN_DEBUG ("plugin_stop_appletviewer return"); +} + +static void +plugin_data_destroy (GCJPluginData** data) +{ + PLUGIN_DEBUG ("plugin_data_destroy"); + + GCJPluginData* tofree = *data; + + tofree->window_handle = NULL; + tofree->window_height = 0; + tofree->window_width = 0; + + // Copied from GCJ_New. + + // cleanup_in_watch_source: + // Removing a source is harmless if it fails since it just means the + // source has already been removed. + g_source_remove (tofree->in_watch_source); + tofree->in_watch_source = 0; + + // cleanup_in_from_appletviewer: + if (tofree->in_from_appletviewer) + g_io_channel_unref (tofree->in_from_appletviewer); + tofree->in_from_appletviewer = NULL; + + // cleanup_out_watch_source: + g_source_remove (tofree->out_watch_source); + tofree->out_watch_source = 0; + + // cleanup_out_to_appletviewer: + if (tofree->out_to_appletviewer) + g_io_channel_unref (tofree->out_to_appletviewer); + tofree->out_to_appletviewer = NULL; + + // cleanup_out_pipe: + // Delete output pipe. + unlink (tofree->out_pipe_name); + + // cleanup_out_pipe_name: + g_free (tofree->out_pipe_name); + tofree->out_pipe_name = NULL; + + // cleanup_in_pipe: + // Delete input pipe. + unlink (tofree->in_pipe_name); + + // cleanup_in_pipe_name: + g_free (tofree->in_pipe_name); + tofree->in_pipe_name = NULL; + + // cleanup_appletviewer_mutex: + g_free (tofree->appletviewer_mutex); + tofree->appletviewer_mutex = NULL; + + // cleanup_instance_string: + g_free (tofree->instance_string); + tofree->instance_string = NULL; + + // cleanup_data: + // Eliminate back-pointer to plugin instance. + tofree->owner = NULL; + (*browserFunctions.memfree) (tofree); + tofree = NULL; + + PLUGIN_DEBUG ("plugin_data_destroy return"); +} + +// FACTORY FUNCTIONS + +// Provides the browser with pointers to the plugin functions that we +// implement and initializes a local table with browser functions that +// we may wish to call. Called once, after browser startup and before +// the first plugin instance is created. +// The field 'initialized' is set to true once this function has +// finished. If 'initialized' is already true at the beginning of +// this function, then it is evident that NP_Initialize has already +// been called. There is no need to call this function more than once and +// this workaround avoids any duplicate calls. +NPError +NP_Initialize (NPNetscapeFuncs* browserTable, NPPluginFuncs* pluginTable) +{ + PLUGIN_DEBUG ("NP_Initialize"); + + if (initialized) + return NPERR_NO_ERROR; + else if ((browserTable == NULL) || (pluginTable == NULL)) + { + PLUGIN_ERROR ("Browser or plugin function table is NULL."); + + return NPERR_INVALID_FUNCTABLE_ERROR; + } + + // Ensure that the major version of the plugin API that the browser + // expects is not more recent than the major version of the API that + // we've implemented. + if ((browserTable->version >> 8) > NP_VERSION_MAJOR) + { + PLUGIN_ERROR ("Incompatible version."); + + return NPERR_INCOMPATIBLE_VERSION_ERROR; + } + + // Ensure that the plugin function table we've received is large + // enough to store the number of functions that we may provide. + if (pluginTable->size < sizeof (NPPluginFuncs)) + { + PLUGIN_ERROR ("Invalid plugin function table."); + + return NPERR_INVALID_FUNCTABLE_ERROR; + } + + // Ensure that the browser function table is large enough to store + // the number of browser functions that we may use. + if (browserTable->size < sizeof (NPNetscapeFuncs)) + { + PLUGIN_ERROR ("Invalid browser function table."); + + return NPERR_INVALID_FUNCTABLE_ERROR; + } + + data_directory = g_strconcat(getenv("HOME"), "/.gcjwebplugin", NULL); + whitelist_filename = g_strconcat (data_directory, "/whitelist.txt", NULL); + // Make sure the plugin data directory exists, creating it if + // necessary. + if (!g_file_test (data_directory, + (GFileTest) (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR))) + { + int file_error = 0; + + file_error = g_mkdir (data_directory, 0700); + if (file_error != 0) + { + PLUGIN_ERROR_THREE ("Failed to create data directory", + data_directory, + strerror (errno)); + return NPERR_GENERIC_ERROR; + } + } + + // Store in a local table the browser functions that we may use. + browserFunctions.version = browserTable->version; + browserFunctions.size = browserTable->size; + browserFunctions.posturl = browserTable->posturl; + browserFunctions.geturl = browserTable->geturl; + browserFunctions.geturlnotify = browserTable->geturlnotify; + browserFunctions.requestread = browserTable->requestread; + browserFunctions.newstream = browserTable->newstream; + browserFunctions.write = browserTable->write; + browserFunctions.destroystream = browserTable->destroystream; + browserFunctions.status = browserTable->status; + browserFunctions.uagent = browserTable->uagent; + browserFunctions.memalloc = browserTable->memalloc; + browserFunctions.memfree = browserTable->memfree; + browserFunctions.memflush = browserTable->memflush; + browserFunctions.reloadplugins = browserTable->reloadplugins; + browserFunctions.getvalue = browserTable->getvalue; + + // Return to the browser the plugin functions that we implement. + pluginTable->version = (NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR; + pluginTable->size = sizeof (NPPluginFuncs); +#if (((NP_VERSION_MAJOR << 8) + NP_VERSION_MINOR) < 20) + pluginTable->newp = NewNPP_NewProc (GCJ_New); + pluginTable->destroy = NewNPP_DestroyProc (GCJ_Destroy); + pluginTable->setwindow = NewNPP_SetWindowProc (GCJ_SetWindow); + pluginTable->newstream = NewNPP_NewStreamProc (GCJ_NewStream); + pluginTable->destroystream = NewNPP_DestroyStreamProc (GCJ_DestroyStream); + pluginTable->asfile = NewNPP_StreamAsFileProc (GCJ_StreamAsFile); + pluginTable->writeready = NewNPP_WriteReadyProc (GCJ_WriteReady); + pluginTable->write = NewNPP_WriteProc (GCJ_Write); + pluginTable->print = NewNPP_PrintProc (GCJ_Print); + pluginTable->urlnotify = NewNPP_URLNotifyProc (GCJ_URLNotify); + pluginTable->getvalue = NewNPP_GetValueProc (GCJ_GetValue); +#else + pluginTable->newp = (NPP_NewProcPtr) (GCJ_New); + pluginTable->destroy = (NPP_DestroyProcPtr) (GCJ_Destroy); + pluginTable->setwindow = (NPP_SetWindowProcPtr) (GCJ_SetWindow); + pluginTable->newstream = (NPP_NewStreamProcPtr) (GCJ_NewStream); + pluginTable->destroystream = (NPP_DestroyStreamProcPtr) (GCJ_DestroyStream); + pluginTable->asfile = (NPP_StreamAsFileProcPtr) (GCJ_StreamAsFile); + pluginTable->writeready = (NPP_WriteReadyProcPtr) (GCJ_WriteReady); + pluginTable->write = (NPP_WriteProcPtr) (GCJ_Write); + pluginTable->print = (NPP_PrintProcPtr) (GCJ_Print); + pluginTable->urlnotify = (NPP_URLNotifyProcPtr) (GCJ_URLNotify); + pluginTable->getvalue = (NPP_GetValueProcPtr) (GCJ_GetValue); +#endif + + initialized = true; + + // Initialize threads (needed for mutexes). + if (!g_thread_supported ()) + g_thread_init (NULL); + + plugin_instance_mutex = g_mutex_new (); + + PLUGIN_DEBUG ("NP_Initialize: using " APPLETVIEWER_EXECUTABLE "."); + + PLUGIN_DEBUG ("NP_Initialize return"); + + return NPERR_NO_ERROR; +} + +// Returns a string describing the MIME type that this plugin +// handles. +char* +NP_GetMIMEDescription (void) +{ + PLUGIN_DEBUG ("NP_GetMIMEDescription"); + + PLUGIN_DEBUG ("NP_GetMIMEDescription return"); + + return (char*) PLUGIN_MIME_DESC; +} + +// Returns a value relevant to the plugin as a whole. The browser +// calls this function to obtain information about the plugin. +NPError +NP_GetValue (void* future, NPPVariable variable, void* value) +{ + PLUGIN_DEBUG ("NP_GetValue"); + + NPError result = NPERR_NO_ERROR; + gchar** char_value = (gchar**) value; + + switch (variable) + { + case NPPVpluginNameString: + PLUGIN_DEBUG ("NP_GetValue: returning plugin name."); + *char_value = g_strdup (PLUGIN_NAME " " PACKAGE_VERSION); + break; + + case NPPVpluginDescriptionString: + PLUGIN_DEBUG ("NP_GetValue: returning plugin description."); + *char_value = g_strdup (PLUGIN_DESC); + break; + + default: + PLUGIN_ERROR ("Unknown plugin value requested."); + result = NPERR_GENERIC_ERROR; + break; + } + + PLUGIN_DEBUG ("NP_GetValue return"); + + return result; +} + +// Shuts down the plugin. Called after the last plugin instance is +// destroyed. +NPError +NP_Shutdown (void) +{ + PLUGIN_DEBUG ("NP_Shutdown"); + + // Free mutex. + if (plugin_instance_mutex) + { + g_mutex_free (plugin_instance_mutex); + plugin_instance_mutex = NULL; + } + + if (whitelist_file) + { + g_io_channel_close (whitelist_file); + whitelist_file = NULL; + } + + if (data_directory) + { + g_free (data_directory); + data_directory = NULL; + } + + if (whitelist_filename) + { + g_free (whitelist_filename); + whitelist_filename = NULL; + } + + initialized = false; + + PLUGIN_DEBUG ("NP_Shutdown return"); + + return NPERR_NO_ERROR; +} |