The rest of the Follow UDP Stream check-in

svn path=/trunk/; revision=23347

2 files changed, 319 insertions, 0 deletions

diff --git a/gtk/follow_udp.c b/gtk/follow_udp.c
new file mode 100644
index 0000000000..2a5b93c82a
--- /dev/null
+++ b/gtk/follow_udp.c
@@ -0,0 +1,285 @@
+/* follow_udp.c
+ * UDP specific routines for following traffic 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.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include <string.h>
+
+#include <epan/addr_resolv.h>
+#include <epan/epan_dissect.h>
+#include <epan/follow.h>
+#include <epan/ipproto.h>
+#include <epan/strutil.h>
+#include <epan/tap.h>
+#include "follow_stream.h"
+#include <globals.h>
+#include <gtk/compat_macros.h>
+#include <gtk/keys.h>
+#include <gtk/main.h>
+#include <simple_dialog.h>
+
+#include "follow_udp.h"
+
+
+static int
+udp_queue_packet_data(void *tapdata, packet_info *pinfo,
+		      epan_dissect_t *edt _U_, const void *data)
+{
+	follow_record_t *follow_record;
+	follow_info_t *follow_info = tapdata;
+	const tvbuff_t *next_tvb = data;
+	
+	follow_record = g_malloc(sizeof(follow_record_t));
+
+	follow_record->data = g_byte_array_sized_new(next_tvb->length);
+	follow_record->data = g_byte_array_append(follow_record->data,
+						  next_tvb->real_data,
+						  next_tvb->length);
+
+	if (follow_info->client_port == 0) {
+		follow_info->client_port = pinfo->srcport;
+		memcpy(follow_info->client_ip, pinfo->src.data, pinfo->src.len);
+	}
+
+	if (memcmp(follow_info->client_ip, pinfo->src.data, pinfo->src.len) ==
+	    0 && follow_info->client_port == pinfo->srcport)
+		follow_record->is_server = FALSE;
+	else 
+		follow_record->is_server = TRUE;
+
+	/* update stream counter */
+	follow_info->bytes_written[follow_record->is_server] +=
+		follow_record->data->len;
+
+	follow_info->payload = g_list_append(follow_info->payload,
+					     follow_record);
+	return 0;
+}
+
+
+/* Follow the UDP stream, if any, to which the last packet that we called
+   a dissection routine on belongs (this might be the most recently
+   selected packet, or it might be the last packet in the file). */
+void
+follow_udp_stream_cb(GtkWidget *w, gpointer data _U_)
+{
+	GtkWidget *filter_te;
+	gchar *follow_filter;
+	const gchar *previous_filter;
+	int filter_out_filter_len, previous_filter_len;
+	const char *hostname0, *hostname1;
+	char *port0, *port1;
+	gchar *server_to_client_string = NULL;
+	gchar *client_to_server_string = NULL;
+	gchar *both_directions_string = NULL;
+	follow_stats_t stats;
+	follow_info_t *follow_info;
+	GString *msg;
+
+	/* we got udp so we can follow */
+	if(cfile.edt->pi.ipproto != IP_PROTO_UDP) {
+		simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+			      "Error following stream.  Please make\n"
+			      "sure you have a UDP packet selected.");
+		return;
+	}
+	
+	follow_info = g_new0(follow_info_t, 1);
+	follow_info->follow_type = FOLLOW_UDP;
+
+	/* Create a new filter that matches all packets in the UDP stream,
+	   and set the display filter entry accordingly */
+	follow_filter = build_follow_filter(&cfile.edt->pi);
+	if (!follow_filter)
+		{
+			simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+				      "Error creating filter for this stream.\n"
+				      "A network layer header is needed");
+			return;
+		}
+
+	/* Set the display filter entry accordingly */
+	filter_te = OBJECT_GET_DATA(w, E_DFILTER_TE_KEY);
+
+	/* needed in follow_filter_out_stream(), is there a better way? */
+	follow_info->filter_te = filter_te;
+
+	/* save previous filter, const since we're not supposed to alter */
+	previous_filter =
+		(const gchar *)gtk_entry_get_text(GTK_ENTRY(filter_te));
+
+	/* allocate our new filter. API claims g_malloc terminates program on failure */
+	/* my calc for max alloc needed is really +10 but when did a few extra bytes hurt ? */
+	previous_filter_len = previous_filter?strlen(previous_filter):0;
+	filter_out_filter_len = strlen(follow_filter) + previous_filter_len + 16;
+	follow_info->filter_out_filter = (gchar *)g_malloc(filter_out_filter_len);
+
+	/* append the negation */
+	if(previous_filter_len) {
+		g_snprintf(follow_info->filter_out_filter, filter_out_filter_len,
+			   "%s and !(%s)", previous_filter, follow_filter);
+	} else {
+		g_snprintf(follow_info->filter_out_filter, filter_out_filter_len,
+			   "!(%s)", follow_filter);
+	}
+
+	/* data will be passed via tap callback*/
+	msg = register_tap_listener("udp_follow", follow_info, follow_filter,
+				    NULL, udp_queue_packet_data, NULL);
+	if (msg) {
+		simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
+			      "Can't register udp_follow tap: %s\n",
+			      msg->str);
+		return;
+	}
+
+	gtk_entry_set_text(GTK_ENTRY(filter_te), follow_filter);
+
+	/* Run the display filter so it goes in effect - even if it's the
+	   same as the previous display filter. */
+	main_filter_packets(&cfile, follow_filter, TRUE);
+
+	/* Free the filter string, as we're done with it. */
+	g_free(follow_filter);
+
+	remove_tap_listener(follow_info);
+
+	/* Stream to show */
+	follow_stats(&stats);
+
+	if (stats.is_ipv6) {
+		struct e_in6_addr ipaddr;
+		memcpy(&ipaddr, stats.ip_address[0], 16);
+		hostname0 = get_hostname6(&ipaddr);
+		memcpy(&ipaddr, stats.ip_address[0], 16);
+		hostname1 = get_hostname6(&ipaddr);
+	} else {
+		guint32 ipaddr;
+		memcpy(&ipaddr, stats.ip_address[0], 4);
+		hostname0 = get_hostname(ipaddr);
+		memcpy(&ipaddr, stats.ip_address[1], 4);
+		hostname1 = get_hostname(ipaddr);
+	}
+    
+	port0 = get_udp_port(stats.port[0]);
+	port1 = get_udp_port(stats.port[1]);
+    
+	follow_info->is_ipv6 = stats.is_ipv6;
+
+	/* Both Stream Directions */
+	both_directions_string = g_strdup_printf("Entire conversation (%u bytes)", follow_info->bytes_written[0] + follow_info->bytes_written[1]);
+    
+	/* Host 0 --> Host 1 */
+	server_to_client_string =
+		g_strdup_printf("%s:%s --> %s:%s (%u bytes)",
+				hostname0, port0,
+				hostname1, port1,
+				follow_info->bytes_written[0]);
+
+	/* Host 1 --> Host 0 */
+	client_to_server_string =
+		g_strdup_printf("%s:%s --> %s:%s (%u bytes)",
+				hostname1, port1,
+				hostname0, port0,
+				follow_info->bytes_written[1]);
+
+	follow_stream("Follow UDP Stream", follow_info, both_directions_string,
+		      server_to_client_string, client_to_server_string);
+
+	g_free(both_directions_string);
+	g_free(server_to_client_string);
+	g_free(client_to_server_string);
+}
+
+#define FLT_BUF_SIZE 1024
+
+/*
+ * XXX - the routine pointed to by "print_line" doesn't get handed lines,
+ * it gets handed bufferfuls.  That's fine for "follow_write_raw()"
+ * and "follow_add_to_gtk_text()", but, as "follow_print_text()" calls
+ * the "print_line()" routine from "print.c", and as that routine might
+ * genuinely expect to be handed a line (if, for example, it's using
+ * some OS or desktop environment's printing API, and that API expects
+ * to be handed lines), "follow_print_text()" should probably accumulate
+ * lines in a buffer and hand them "print_line()".  (If there's a
+ * complete line in a buffer - i.e., there's nothing of the line in
+ * the previous buffer or the next buffer - it can just hand that to
+ * "print_line()" after filtering out non-printables, as an
+ * optimization.)
+ *
+ * This might or might not be the reason why C arrays display
+ * correctly but get extra blank lines very other line when printed.
+ */
+frs_return_t
+follow_read_udp_stream(follow_info_t *follow_info,
+		       gboolean (*print_line)(char *, size_t, gboolean, void *),
+		       void *arg)
+{
+	int iplen;
+	guint32 global_client_pos = 0, global_server_pos = 0;
+	guint32	*global_pos;
+	gboolean skip;
+	GList* cur;
+	frs_return_t frs_return;
+	follow_record_t *follow_record;
+	char *buffer;
+
+	iplen = (follow_info->is_ipv6) ? 16 : 4;
+    
+	for (cur = follow_info->payload; cur; cur = g_list_next(cur)) {
+		follow_record = cur->data;
+		skip = FALSE;
+		if (!follow_record->is_server) {
+			global_pos = &global_client_pos;
+			if(follow_info->show_stream == FROM_SERVER) {
+				skip = TRUE;
+			}
+		}
+		else {
+			global_pos = &global_server_pos;
+			if (follow_info->show_stream == FROM_CLIENT) {
+				skip = TRUE;
+			}
+		}
+
+		if (!skip) {
+			buffer = g_memdup(follow_record->data->data,
+					  follow_record->data->len);
+            
+			frs_return = follow_show(follow_info, print_line,
+						 buffer,
+						 follow_record->data->len,
+						 follow_record->is_server, arg,
+						 global_pos);
+			g_free(buffer);
+			if(frs_return == FRS_PRINT_ERROR)
+				return frs_return;
+		}
+	}
+
+	return FRS_OK;
+}
diff --git a/gtk/follow_udp.h b/gtk/follow_udp.h
new file mode 100644
index 0000000000..852e1c8392
--- /dev/null
+++ b/gtk/follow_udp.h
@@ -0,0 +1,34 @@
+/* follow_udp.h
+ * UDP specific routines for following traffic 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef __FOLLOW_UDP_H__
+#define __FOLLOW_UDP_H__
+
+/* Follow the UDP stream, if any, to which the last packet that we called
+   a dissection routine on belongs (this might be the most recently
+   selected packet, or it might be the last packet in the file). */
+void follow_udp_stream_cb(GtkWidget * w, gpointer data _U_);
+
+#endif /* __FOLLOW_UDP_H__ */
+