Initial work on merging common code between follow TCP & SSL stream features

svn path=/trunk/; revision=22520

1 files changed, 691 insertions, 0 deletions

diff --git a/gtk/follow_stream.c b/gtk/follow_stream.c
new file mode 100644
index 0000000000..05ded5533c
--- /dev/null
+++ b/gtk/follow_stream.c
@@ -0,0 +1,691 @@
+/* follow_stream.c
+ * Common routines for following data streams
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program 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
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
+ * USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <ctype.h>
+#include <string.h>
+
+#include <gtk/gtk.h>
+
+#include <alert_box.h>
+#include <main.h>
+#include <isprint.h>
+#include <print.h>
+#include <epan/follow.h>
+#include <epan/filesystem.h>
+#include <epan/prefs.h>
+#include <gtk/colors.h>
+#include <gtk/compat_macros.h>
+#include <gtk/dlg_utils.h>
+#include <gtk/follow_stream.h>
+#include <gtk/font_utils.h>
+#include <gtk/file_dlg.h>
+#include <gtk/gui_utils.h>
+#include <simple_dialog.h>
+#include <wiretap/file_util.h>
+
+/* static variable declarations to speed up the performance
+ * of follow_load_text and follow_add_to_gtk_text
+ */
+static GdkColor server_fg, server_bg;
+static GdkColor client_fg, client_bg;
+#if GTK_MAJOR_VERSION >= 2
+static GtkTextTag *server_tag, *client_tag;
+#endif
+
+frs_return_t
+follow_read_stream(follow_info_t *follow_info,
+		   gboolean (*print_line)(char *, size_t, gboolean, void *),
+		   void *arg)
+{
+	switch(follow_info->follow_type) {
+
+	case FOLLOW_TCP :
+		return follow_read_tcp_stream(follow_info, print_line, arg);
+
+	case FOLLOW_SSL :
+		return follow_read_ssl_stream(follow_info, print_line, arg);
+
+	default :
+		g_assert_not_reached();
+	}
+}
+
+gboolean
+follow_add_to_gtk_text(char *buffer, size_t nchars, gboolean is_server,
+		       void *arg)
+{
+	GtkWidget *text = arg;
+#if GTK_MAJOR_VERSION >= 2
+	GtkTextBuffer *buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text));
+	GtkTextIter    iter;
+#endif
+
+#if GTK_MAJOR_VERSION >= 2 || GTK_MINOR_VERSION >= 3
+	/* While our isprint() hack is in place, we
+	 * have to use convert some chars to '.' in order
+	 * to be able to see the data we *should* see
+	 * in the GtkText widget.
+	 */
+	size_t i;
+
+	for (i = 0; i < nchars; i++) {
+		if (buffer[i] == '\n' || buffer[i] == '\r')
+			continue;
+		if (! isprint((guchar)buffer[i])) {
+			buffer[i] = '.';
+		}
+	}
+#endif
+
+#if GTK_MAJOR_VERSION < 2
+	if (is_server) {
+		gtk_text_insert(GTK_TEXT(text), user_font_get_regular(), &server_fg, 
+				&server_bg, buffer, nchars);
+	} else {
+		gtk_text_insert(GTK_TEXT(text), user_font_get_regular(), &client_fg, 
+				&client_bg, buffer, nchars);
+	}
+#else
+	gtk_text_buffer_get_end_iter(buf, &iter);
+	if (is_server) {
+		gtk_text_buffer_insert_with_tags(buf, &iter, buffer, nchars, 
+						 server_tag, NULL);
+	} else {
+		gtk_text_buffer_insert_with_tags(buf, &iter, buffer, nchars, 
+						 client_tag, NULL);
+	}
+#endif
+	return TRUE;
+}
+
+/*
+ * XXX - for text printing, we probably want to wrap lines at 80 characters;
+ * (PostScript printing is doing this already), and perhaps put some kind of 
+ * dingbat (to use the technical term) to indicate a wrapped line, along the 
+ * lines of what's done when displaying this in a window, as per Warren Young's 
+ * suggestion.
+ */
+gboolean
+follow_print_text(char *buffer, size_t nchars, gboolean is_server _U_, void *arg)
+{
+	print_stream_t *stream = arg;
+	size_t i;
+	char *str;
+
+	/* convert non printable characters */
+	for (i = 0; i < nchars; i++) {
+		if (buffer[i] == '\n' || buffer[i] == '\r')
+			continue;
+		if (! isprint((guchar)buffer[i])) {
+			buffer[i] = '.';
+		}
+	}
+
+	/* convert unterminated char array to a zero terminated string */
+	str = g_malloc(nchars + 1);
+	memcpy(str, buffer, nchars);
+	str[nchars] = 0;
+	print_line(stream, /*indent*/ 0, str);
+	g_free(str);
+
+	return TRUE;
+}
+
+gboolean
+follow_write_raw(char *buffer, size_t nchars, gboolean is_server _U_, void *arg)
+{
+	FILE *fh = arg;
+	size_t nwritten;
+
+	nwritten = fwrite(buffer, 1, nchars, fh);
+	if (nwritten != nchars)
+		return FALSE;
+
+	return TRUE;
+}
+
+/* Handles the display style toggling */
+void
+follow_charset_toggle_cb(GtkWidget * w _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+
+	/*
+	 * A radio button toggles when it goes on and when it goes
+	 * off, so when you click a radio button two signals are
+	 * delivered.  We only want to reprocess the display once,
+	 * so we do it only when the button goes on.
+	 */
+	if (GTK_TOGGLE_BUTTON(w)->active) {
+		if (w == follow_info->ebcdic_bt)
+			follow_info->show_type = SHOW_EBCDIC;
+		else if (w == follow_info->hexdump_bt)
+			follow_info->show_type = SHOW_HEXDUMP;
+		else if (w == follow_info->carray_bt)
+			follow_info->show_type = SHOW_CARRAY;
+		else if (w == follow_info->ascii_bt)
+			follow_info->show_type = SHOW_ASCII;
+		else if (w == follow_info->raw_bt)
+			follow_info->show_type = SHOW_RAW;
+		follow_load_text(follow_info);
+	}
+}
+
+void
+follow_load_text(follow_info_t *follow_info)
+{
+#if GTK_MAJOR_VERSION < 2
+	int bytes_already;
+#else
+	GtkTextBuffer *buf;
+
+	buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(follow_info->text));
+#endif
+
+	/* prepare colors one time for repeated use by follow_add_to_gtk_text */
+	color_t_to_gdkcolor(&server_fg, &prefs.st_server_fg);
+	color_t_to_gdkcolor(&server_bg, &prefs.st_server_bg);
+	color_t_to_gdkcolor(&client_fg, &prefs.st_client_fg);
+	color_t_to_gdkcolor(&client_bg, &prefs.st_client_bg);
+
+	/* Delete any info already in text box */
+#if GTK_MAJOR_VERSION < 2
+	bytes_already = gtk_text_get_length(GTK_TEXT(follow_info->text));
+	if (bytes_already > 0) {
+		gtk_text_set_point(GTK_TEXT(follow_info->text), 0);
+		gtk_text_forward_delete(GTK_TEXT(follow_info->text), bytes_already);
+	}
+
+	/* stop the updates while we fill the text box */
+	gtk_text_freeze(GTK_TEXT(follow_info->text));
+#else
+	/* prepare tags one time for repeated use by follow_add_to_gtk_text */
+	server_tag = gtk_text_buffer_create_tag(buf, NULL, "foreground-gdk",
+						&server_fg, "background-gdk",
+						&server_bg, "font-desc",
+						user_font_get_regular(), NULL);
+	client_tag = gtk_text_buffer_create_tag(buf, NULL, "foreground-gdk",
+						&client_fg, "background-gdk",
+						&client_bg, "font-desc",
+						user_font_get_regular(), NULL);
+
+	gtk_text_buffer_set_text(buf, "", -1);
+#endif
+	follow_read_stream(follow_info, follow_add_to_gtk_text,
+			   follow_info->text);
+#if GTK_MAJOR_VERSION < 2
+	gtk_text_thaw(GTK_TEXT(follow_info->text));
+#endif
+}
+
+void
+follow_filter_out_stream(GtkWidget * w _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+
+	/* Lock out user from messing with us. (ie. don't free our data!) */
+	gtk_widget_set_sensitive(follow_info->streamwindow, FALSE);
+
+	/* Set the display filter. */
+	gtk_entry_set_text(GTK_ENTRY(follow_info->filter_te), follow_info->filter_out_filter);
+
+	/* Run the display filter so it goes in effect. */
+	main_filter_packets(&cfile, follow_info->filter_out_filter, FALSE);
+
+	/* we force a subsequent close */
+	window_destroy(follow_info->streamwindow);
+
+	return;
+}
+
+#if GTK_CHECK_VERSION(2,4,0)
+void
+follow_find_cb(GtkWidget * w _U_, gpointer data)
+{
+	follow_info_t      	*follow_info = data;
+	GtkTooltips		*tooltips;
+	GtkWidget		*find_dlg_w, *main_vb, *buttons_row, *find_lb;
+	GtkWidget		*find_hb, *find_text_box, *find_bt, *cancel_bt;
+
+	tooltips = gtk_tooltips_new();
+
+	if (follow_info->find_dlg_w != NULL) {
+		/* There's already a dialog box; reactivate it. */
+		reactivate_window(follow_info->find_dlg_w);
+		return;
+	}
+
+	/* Create the find box */
+	find_dlg_w = dlg_window_new("Wireshark: Find text");
+	gtk_window_set_transient_for(GTK_WINDOW(find_dlg_w),
+				     GTK_WINDOW(follow_info->streamwindow));
+	gtk_window_set_destroy_with_parent(GTK_WINDOW(find_dlg_w), TRUE);
+	follow_info->find_dlg_w = find_dlg_w;
+
+	SIGNAL_CONNECT(find_dlg_w, "destroy", follow_find_destroy_cb, follow_info);
+	SIGNAL_CONNECT(find_dlg_w, "delete_event", window_delete_event_cb, NULL);
+
+	/* Main vertical box */
+	main_vb = gtk_vbox_new(FALSE, 3);
+	gtk_container_border_width(GTK_CONTAINER(main_vb), 5);
+	gtk_container_add(GTK_CONTAINER(find_dlg_w), main_vb);
+
+	/* Horizontal box for find label, entry field and up/down radio buttons*/
+	find_hb = gtk_hbox_new(FALSE, 3);
+	gtk_container_add(GTK_CONTAINER(main_vb), find_hb);
+	gtk_widget_show(find_hb);
+
+	/* Find label */
+	find_lb = gtk_label_new("Find text:");
+	gtk_box_pack_start(GTK_BOX(find_hb), find_lb, FALSE, FALSE, 0);
+	gtk_widget_show(find_lb);
+
+	/* Find field */
+	find_text_box = gtk_entry_new();
+	gtk_box_pack_start(GTK_BOX(find_hb), find_text_box, FALSE, FALSE, 0);
+	gtk_tooltips_set_tip(tooltips, find_text_box, "Text to search for (case sensitive)", NULL);
+	gtk_widget_show(find_text_box);
+
+	/* Buttons row */
+	buttons_row = dlg_button_row_new(GTK_STOCK_FIND, GTK_STOCK_CANCEL, NULL);
+	gtk_container_add(GTK_CONTAINER(main_vb), buttons_row);
+	find_bt = OBJECT_GET_DATA(buttons_row, GTK_STOCK_FIND);
+	cancel_bt = OBJECT_GET_DATA(buttons_row, GTK_STOCK_CANCEL);
+
+	SIGNAL_CONNECT(find_bt, "clicked", follow_find_button_cb, follow_info);
+	OBJECT_SET_DATA(find_bt, "find_string", find_text_box);
+	window_set_cancel_button(find_dlg_w, cancel_bt, window_cancel_button_cb);
+
+	/* Hitting return in the find field "clicks" the find button */
+	dlg_set_activate(find_text_box, find_bt);
+
+	/* Show the dialog */
+	gtk_widget_show_all(find_dlg_w);
+	window_present(find_dlg_w);
+}
+
+void
+follow_find_button_cb(GtkWidget * w, gpointer data)
+{
+	gboolean		found;
+	const gchar		*find_string;
+	follow_info_t	*follow_info = data;
+	GtkTextBuffer	*buffer;
+	GtkTextIter		iter, match_start, match_end;
+	GtkTextMark		*last_pos_mark;
+	GtkWidget		*find_string_w;
+
+	/* Get the text the user typed into the find field */
+	find_string_w = (GtkWidget *)OBJECT_GET_DATA(w, "find_string");
+	find_string = gtk_entry_get_text(GTK_ENTRY(find_string_w));
+
+	/* Get the buffer associated with the follow stream */
+	buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(follow_info->text));
+	gtk_text_buffer_get_start_iter(buffer, &iter);
+
+	/* Look for the search string in the buffer */
+	last_pos_mark = gtk_text_buffer_get_mark(buffer, "last_position");
+	if(last_pos_mark)
+		gtk_text_buffer_get_iter_at_mark(buffer, &iter, last_pos_mark);
+
+	found = gtk_text_iter_forward_search(&iter, find_string, 0, &match_start,
+					     &match_end,
+					     NULL);
+
+	if(found) {
+		gtk_text_buffer_select_range(buffer, &match_start, &match_end);
+		last_pos_mark = gtk_text_buffer_create_mark (buffer, "last_position",
+							     &match_end, FALSE);
+		gtk_text_view_scroll_mark_onscreen(GTK_TEXT_VIEW(follow_info->text), last_pos_mark);
+	} else {
+		/* We didn't find a match */
+		simple_dialog(ESD_TYPE_INFO, ESD_BTN_OK,
+			      "%sFind text has reached the end of the followed "
+			      "stream%s\n\nThe next search will start from the "
+			      "beginning", simple_dialog_primary_start(),
+			      simple_dialog_primary_end());
+		if(last_pos_mark)
+			gtk_text_buffer_delete_mark(buffer, last_pos_mark);
+	}
+	
+}
+
+void
+follow_find_destroy_cb(GtkWidget * win _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+
+	/* Note that we no longer have a dialog box. */
+	follow_info->find_dlg_w = NULL;
+}
+#endif /* GTK_CHECK_VERSION(2,4,0) */
+
+void
+follow_print_stream(GtkWidget * w _U_, gpointer data)
+{
+	print_stream_t	*stream;
+	gboolean		to_file;
+	char		*print_dest;
+	follow_info_t	*follow_info = data;
+#ifdef _WIN32
+	gboolean win_printer = FALSE;
+#endif
+
+	switch (prefs.pr_dest) {
+	case PR_DEST_CMD:
+#ifdef _WIN32
+		win_printer = TRUE;
+		/*XXX should use temp file stuff in util routines */
+		print_dest = g_strdup(tmpnam(NULL));
+		to_file = TRUE;
+#else
+		print_dest = prefs.pr_cmd;
+		to_file = FALSE;
+#endif
+		break;
+	case PR_DEST_FILE:
+		print_dest = prefs.pr_file;
+		to_file = TRUE;
+		break;
+	default:			/* "Can't happen" */
+		simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+			      "Couldn't figure out where to send the print "
+			      "job. Check your preferences.");
+		return;
+	}
+
+	switch (prefs.pr_format) {
+
+	case PR_FMT_TEXT:
+		stream = print_stream_text_new(to_file, print_dest);
+		break;
+
+	case PR_FMT_PS:
+		stream = print_stream_ps_new(to_file, print_dest);
+		break;
+
+	default:
+		g_assert_not_reached();
+		stream = NULL;
+	}
+	if (stream == NULL) {
+		if (to_file) {
+			open_failure_alert_box(prefs.pr_file, errno, TRUE);
+		} else {
+			simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+				      "Couldn't run print command %s.", prefs.pr_cmd);
+		}
+		return;
+	}
+
+	if (!print_preamble(stream, cfile.filename))
+		goto print_error;
+
+	switch (follow_read_stream(follow_info, follow_print_text, stream)) {
+	case FRS_OK:
+		break;
+	case FRS_OPEN_ERROR:
+	case FRS_READ_ERROR:
+		/* XXX - cancel printing? */
+		destroy_print_stream(stream);
+		return;
+	case FRS_PRINT_ERROR:
+		goto print_error;
+	}
+
+	if (!print_finale(stream))
+		goto print_error;
+
+	if (!destroy_print_stream(stream)) {
+		if (to_file) {
+			write_failure_alert_box(prefs.pr_file, errno);
+		} else {
+			simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+				      "Error closing print destination.");
+		}
+	}
+#ifdef _WIN32
+	if (win_printer) {
+		print_mswin(print_dest);
+
+		/* trash temp file */
+		eth_remove(print_dest);
+	}
+#endif
+	return;
+
+ print_error:
+	if (to_file) {
+		write_failure_alert_box(prefs.pr_file, errno);
+	} else {
+		simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+			      "Error writing to print command: %s", strerror(errno));
+	}
+	/* XXX - cancel printing? */
+	destroy_print_stream(stream);
+
+#ifdef _WIN32
+	if (win_printer) {
+		/* trash temp file */
+		eth_remove(print_dest);
+	}
+#endif
+}
+
+/*
+ * Keep a static pointer to the current "Save TCP Follow Stream As" window, if
+ * any, so that if somebody tries to do "Save"
+ * while there's already a "Save TCP Follow Stream" window up, we just pop
+ * up the existing one, rather than creating a new one.
+ */
+void
+follow_save_as_cmd_cb(GtkWidget *w _U_, gpointer data)
+{
+	GtkWidget		*new_win;
+	follow_info_t	*follow_info = data;
+
+	if (follow_info->follow_save_as_w != NULL) {
+		/* There's already a dialog box; reactivate it. */
+		reactivate_window(follow_info->follow_save_as_w);
+		return;
+	}
+
+	new_win = file_selection_new("Wireshark: Save TCP Follow Stream As",
+				     FILE_SELECTION_SAVE);
+	follow_info->follow_save_as_w = new_win;
+
+	/* Tuck away the follow_info object into the window */
+	OBJECT_SET_DATA(new_win, E_FOLLOW_INFO_KEY, follow_info);
+
+	SIGNAL_CONNECT(new_win, "destroy", follow_save_as_destroy_cb, follow_info);
+
+#if (GTK_MAJOR_VERSION == 2 && GTK_MINOR_VERSION >= 4) || GTK_MAJOR_VERSION > 2
+	if (gtk_dialog_run(GTK_DIALOG(new_win)) == GTK_RESPONSE_ACCEPT)
+		{
+			follow_save_as_ok_cb(new_win, new_win);
+		} else {
+		window_destroy(new_win);
+	}
+#else
+	/* Connect the ok_button to file_save_as_ok_cb function and pass along a
+	   pointer to the file selection box widget */
+	SIGNAL_CONNECT(GTK_FILE_SELECTION(new_win)->ok_button, 
+		       "clicked", follow_save_as_ok_cb, new_win);
+
+	window_set_cancel_button(new_win, 
+				 GTK_FILE_SELECTION(new_win)->cancel_button, window_cancel_button_cb);
+
+	gtk_file_selection_set_filename(GTK_FILE_SELECTION(new_win), "");
+
+	SIGNAL_CONNECT(new_win, "delete_event", window_delete_event_cb, NULL);
+
+	gtk_widget_show_all(new_win);
+	window_present(new_win);
+#endif
+}
+
+
+void
+follow_save_as_ok_cb(GtkWidget * w _U_, gpointer fs)
+{
+	gchar		*to_name;
+	follow_info_t	*follow_info;
+	FILE		*fh;
+	print_stream_t	*stream = NULL;
+	gchar		*dirname;
+
+#if (GTK_MAJOR_VERSION == 2 && GTK_MINOR_VERSION >= 4) || GTK_MAJOR_VERSION > 2
+	to_name = g_strdup(gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(fs)));
+#else
+	to_name = g_strdup(gtk_file_selection_get_filename(GTK_FILE_SELECTION(fs)));
+#endif
+
+	/* Perhaps the user specified a directory instead of a file.
+	   Check whether they did. */
+	if (test_for_directory(to_name) == EISDIR) {
+		/* It's a directory - set the file selection box to display that
+		   directory, and leave the selection box displayed. */
+		set_last_open_dir(to_name);
+		g_free(to_name);
+		file_selection_set_current_folder(fs, get_last_open_dir());
+		return;
+	}
+
+	follow_info = OBJECT_GET_DATA(fs, E_FOLLOW_INFO_KEY);
+	if (follow_info->show_type == SHOW_RAW) {
+		/* Write the data out as raw binary data */
+		fh = eth_fopen(to_name, "wb");
+	} else {
+		/* Write it out as text */
+		fh = eth_fopen(to_name, "w");
+	}
+	if (fh == NULL) {
+		open_failure_alert_box(to_name, errno, TRUE);
+		g_free(to_name);
+		return;
+	}
+
+	gtk_widget_hide(GTK_WIDGET(fs));
+	window_destroy(GTK_WIDGET(fs));
+
+	if (follow_info->show_type == SHOW_RAW) {
+		switch (follow_read_stream(follow_info, follow_write_raw, fh)) {
+		case FRS_OK:
+			if (fclose(fh) == EOF)
+				write_failure_alert_box(to_name, errno);
+			break;
+
+		case FRS_OPEN_ERROR:
+		case FRS_READ_ERROR:
+			fclose(fh);
+			break;
+
+		case FRS_PRINT_ERROR:
+			write_failure_alert_box(to_name, errno);
+			fclose(fh);
+			break;
+		}
+	} else {
+		stream = print_stream_text_stdio_new(fh);
+		switch (follow_read_stream(follow_info, follow_print_text, stream)) {
+		case FRS_OK:
+			if (!destroy_print_stream(stream))
+				write_failure_alert_box(to_name, errno);
+			break;
+
+		case FRS_OPEN_ERROR:
+		case FRS_READ_ERROR:
+			destroy_print_stream(stream);
+			break;
+
+		case FRS_PRINT_ERROR:
+			write_failure_alert_box(to_name, errno);
+			destroy_print_stream(stream);
+			break;
+		}
+	}
+
+	/* Save the directory name for future file dialogs. */
+	dirname = get_dirname(to_name);  /* Overwrites to_name */
+	set_last_open_dir(dirname);
+	g_free(to_name);
+}
+
+void
+follow_save_as_destroy_cb(GtkWidget * win _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+
+	/* Note that we no longer have a dialog box. */
+	follow_info->follow_save_as_w = NULL;
+}
+
+/* XXX - can I emulate follow_charset_toggle_cb() instead of having
+ * 3 different functions here?
+ * That might not be a bad idea, as it might mean we only reload
+ * the window once, not twice - see follow_charset_toggle_cb()
+ * for an explanation. */
+void
+follow_stream_om_both(GtkWidget *w _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+	follow_info->show_stream = BOTH_HOSTS;
+	follow_load_text(follow_info);
+}
+
+void
+follow_stream_om_client(GtkWidget *w _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+	follow_info->show_stream = FROM_CLIENT;
+	follow_load_text(follow_info);
+}
+
+void
+follow_stream_om_server(GtkWidget *w _U_, gpointer data)
+{
+	follow_info_t	*follow_info = data;
+	follow_info->show_stream = FROM_SERVER;
+	follow_load_text(follow_info);
+}
+
+/* Add a "follow_info_t" structure to the list. */
+void
+remember_follow_info(follow_info_t *follow_info)
+{
+	follow_infos = g_list_append(follow_infos, follow_info);
+}
+
+/* Remove a "follow_info_t" structure from the list. */
+void
+forget_follow_info(follow_info_t *follow_info)
+{
+	follow_infos = g_list_remove(follow_infos, follow_info);
+}
+