sort #includes by directories
[obnox/wireshark/wip.git] / gtk / follow_udp.c
1 /* follow_udp.c
2  * UDP specific routines for following traffic streams
3  *
4  * $Id$
5  *
6  * Wireshark - Network traffic analyzer
7  * By Gerald Combs <gerald@wireshark.org>
8  * Copyright 1998 Gerald Combs
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License
12  * as published by the Free Software Foundation; either version 2
13  * of the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
23  * USA.
24  */
25
26 #ifdef HAVE_CONFIG_H
27 # include "config.h"
28 #endif
29 #include <string.h>
30
31 #include <gtk/gtk.h>
32
33 #include <epan/addr_resolv.h>
34 #include <epan/epan_dissect.h>
35 #include <epan/follow.h>
36 #include <epan/ipproto.h>
37 #include <epan/strutil.h>
38 #include <epan/tap.h>
39
40 #include <../globals.h>
41 #include <../simple_dialog.h>
42
43 #include "gtk/follow_stream.h"
44 #include <gtk/keys.h>
45 #include <gtk/main.h>
46 #include "gtk/follow_udp.h"
47
48
49 static int
50 udp_queue_packet_data(void *tapdata, packet_info *pinfo,
51                       epan_dissect_t *edt _U_, const void *data)
52 {
53         follow_record_t *follow_record;
54         follow_info_t *follow_info = tapdata;
55         const tvbuff_t *next_tvb = data;
56         
57         follow_record = g_malloc(sizeof(follow_record_t));
58
59         follow_record->data = g_byte_array_sized_new(next_tvb->length);
60         follow_record->data = g_byte_array_append(follow_record->data,
61                                                   next_tvb->real_data,
62                                                   next_tvb->length);
63
64         if (follow_info->client_port == 0) {
65                 follow_info->client_port = pinfo->srcport;
66                 COPY_ADDRESS(&follow_info->client_ip, &pinfo->src);
67         }
68
69         if (ADDRESSES_EQUAL(&follow_info->client_ip, &pinfo->src) &&
70             follow_info->client_port == pinfo->srcport)
71                 follow_record->is_server = FALSE;
72         else 
73                 follow_record->is_server = TRUE;
74
75         /* update stream counter */
76         follow_info->bytes_written[follow_record->is_server] +=
77                 follow_record->data->len;
78
79         follow_info->payload = g_list_append(follow_info->payload,
80                                              follow_record);
81         return 0;
82 }
83
84
85 /* Follow the UDP stream, if any, to which the last packet that we called
86    a dissection routine on belongs (this might be the most recently
87    selected packet, or it might be the last packet in the file). */
88 void
89 follow_udp_stream_cb(GtkWidget *w, gpointer data _U_)
90 {
91         GtkWidget *filter_te;
92         gchar *follow_filter;
93         const gchar *previous_filter;
94         int filter_out_filter_len, previous_filter_len;
95         const char *hostname0, *hostname1;
96         char *port0, *port1;
97         gchar *server_to_client_string = NULL;
98         gchar *client_to_server_string = NULL;
99         gchar *both_directions_string = NULL;
100         follow_stats_t stats;
101         follow_info_t *follow_info;
102         GString *msg;
103
104         /* we got udp so we can follow */
105         if(cfile.edt->pi.ipproto != IP_PROTO_UDP) {
106                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
107                               "Error following stream.  Please make\n"
108                               "sure you have a UDP packet selected.");
109                 return;
110         }
111         
112         follow_info = g_new0(follow_info_t, 1);
113         follow_info->follow_type = FOLLOW_UDP;
114
115         /* Create a new filter that matches all packets in the UDP stream,
116            and set the display filter entry accordingly */
117         follow_filter = build_follow_filter(&cfile.edt->pi);
118         if (!follow_filter)
119                 {
120                         simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
121                                       "Error creating filter for this stream.\n"
122                                       "A network layer header is needed");
123                         return;
124                 }
125
126         /* Set the display filter entry accordingly */
127         filter_te = g_object_get_data(G_OBJECT(w), E_DFILTER_TE_KEY);
128
129         /* needed in follow_filter_out_stream(), is there a better way? */
130         follow_info->filter_te = filter_te;
131
132         /* save previous filter, const since we're not supposed to alter */
133         previous_filter =
134                 (const gchar *)gtk_entry_get_text(GTK_ENTRY(filter_te));
135
136         /* allocate our new filter. API claims g_malloc terminates program on failure */
137         /* my calc for max alloc needed is really +10 but when did a few extra bytes hurt ? */
138         previous_filter_len = previous_filter?strlen(previous_filter):0;
139         filter_out_filter_len = strlen(follow_filter) + previous_filter_len + 16;
140         follow_info->filter_out_filter = (gchar *)g_malloc(filter_out_filter_len);
141
142         /* append the negation */
143         if(previous_filter_len) {
144                 g_snprintf(follow_info->filter_out_filter, filter_out_filter_len,
145                            "%s and !(%s)", previous_filter, follow_filter);
146         } else {
147                 g_snprintf(follow_info->filter_out_filter, filter_out_filter_len,
148                            "!(%s)", follow_filter);
149         }
150
151         /* data will be passed via tap callback*/
152         msg = register_tap_listener("udp_follow", follow_info, follow_filter,
153                                     NULL, udp_queue_packet_data, NULL);
154         if (msg) {
155                 simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
156                               "Can't register udp_follow tap: %s\n",
157                               msg->str);
158                 return;
159         }
160
161         gtk_entry_set_text(GTK_ENTRY(filter_te), follow_filter);
162
163         /* Run the display filter so it goes in effect - even if it's the
164            same as the previous display filter. */
165         main_filter_packets(&cfile, follow_filter, TRUE);
166
167         /* Free the filter string, as we're done with it. */
168         g_free(follow_filter);
169
170         remove_tap_listener(follow_info);
171
172         /* Stream to show */
173         follow_stats(&stats);
174
175         if (stats.is_ipv6) {
176                 struct e_in6_addr ipaddr;
177                 memcpy(&ipaddr, stats.ip_address[0], 16);
178                 hostname0 = get_hostname6(&ipaddr);
179                 memcpy(&ipaddr, stats.ip_address[0], 16);
180                 hostname1 = get_hostname6(&ipaddr);
181         } else {
182                 guint32 ipaddr;
183                 memcpy(&ipaddr, stats.ip_address[0], 4);
184                 hostname0 = get_hostname(ipaddr);
185                 memcpy(&ipaddr, stats.ip_address[1], 4);
186                 hostname1 = get_hostname(ipaddr);
187         }
188     
189         port0 = get_udp_port(stats.port[0]);
190         port1 = get_udp_port(stats.port[1]);
191     
192         follow_info->is_ipv6 = stats.is_ipv6;
193
194         /* Both Stream Directions */
195         both_directions_string = g_strdup_printf("Entire conversation (%u bytes)", follow_info->bytes_written[0] + follow_info->bytes_written[1]);
196     
197         if(follow_info->client_port == stats.port[0]) {
198                 server_to_client_string =
199                         g_strdup_printf("%s:%s --> %s:%s (%u bytes)",
200                                         hostname0, port0,
201                                         hostname1, port1,
202                                         follow_info->bytes_written[0]);
203                 
204                 client_to_server_string =
205                         g_strdup_printf("%s:%s --> %s:%s (%u bytes)",
206                                         hostname1, port1,
207                                         hostname0, port0,
208                                         follow_info->bytes_written[1]);
209         } else {
210                 server_to_client_string =
211                         g_strdup_printf("%s:%s --> %s:%s (%u bytes)",
212                                         hostname1, port1,
213                                         hostname0, port0,
214                                         follow_info->bytes_written[0]);
215                 
216                 client_to_server_string =
217                         g_strdup_printf("%s:%s --> %s:%s (%u bytes)",
218                                         hostname0, port0,
219                                         hostname1, port1,
220                                         follow_info->bytes_written[1]);
221         }
222
223         follow_stream("Follow UDP Stream", follow_info, both_directions_string,
224                       server_to_client_string, client_to_server_string);
225
226         g_free(both_directions_string);
227         g_free(server_to_client_string);
228         g_free(client_to_server_string);
229 }
230
231 #define FLT_BUF_SIZE 1024
232
233 /*
234  * XXX - the routine pointed to by "print_line" doesn't get handed lines,
235  * it gets handed bufferfuls.  That's fine for "follow_write_raw()"
236  * and "follow_add_to_gtk_text()", but, as "follow_print_text()" calls
237  * the "print_line()" routine from "print.c", and as that routine might
238  * genuinely expect to be handed a line (if, for example, it's using
239  * some OS or desktop environment's printing API, and that API expects
240  * to be handed lines), "follow_print_text()" should probably accumulate
241  * lines in a buffer and hand them "print_line()".  (If there's a
242  * complete line in a buffer - i.e., there's nothing of the line in
243  * the previous buffer or the next buffer - it can just hand that to
244  * "print_line()" after filtering out non-printables, as an
245  * optimization.)
246  *
247  * This might or might not be the reason why C arrays display
248  * correctly but get extra blank lines very other line when printed.
249  */
250 frs_return_t
251 follow_read_udp_stream(follow_info_t *follow_info,
252                        gboolean (*print_line)(char *, size_t, gboolean, void *),
253                        void *arg)
254 {
255         int iplen;
256         guint32 global_client_pos = 0, global_server_pos = 0;
257         guint32 server_packet_count = 0;
258         guint32 client_packet_count = 0;
259         guint32 *global_pos;
260         gboolean skip;
261         GList* cur;
262         frs_return_t frs_return;
263         follow_record_t *follow_record;
264         char *buffer;
265
266         iplen = (follow_info->is_ipv6) ? 16 : 4;
267     
268         for (cur = follow_info->payload; cur; cur = g_list_next(cur)) {
269                 follow_record = cur->data;
270                 skip = FALSE;
271                 if (!follow_record->is_server) {
272                         global_pos = &global_client_pos;
273                         if(follow_info->show_stream == FROM_SERVER) {
274                                 skip = TRUE;
275                         }
276                 } else {
277                         global_pos = &global_server_pos;
278                         if (follow_info->show_stream == FROM_CLIENT) {
279                                 skip = TRUE;
280                         }
281                 }
282
283                 if (!skip) {
284                         buffer = g_memdup(follow_record->data->data,
285                                           follow_record->data->len);
286             
287                         frs_return = follow_show(follow_info, print_line,
288                                                  buffer,
289                                                  follow_record->data->len,
290                                                  follow_record->is_server, arg,
291                                                  global_pos, 
292                                                  &server_packet_count,
293                                                  &client_packet_count);
294                         g_free(buffer);
295                         if(frs_return == FRS_PRINT_ERROR)
296                                 return frs_return;
297                 }
298         }
299
300         return FRS_OK;
301 }