capture_info.c

   1 /* capture_info.c
   2  * capture info functions
   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 USA.
  23  */
  24
  25 #include "config.h"
  26
  27 #ifdef HAVE_LIBPCAP
  28
  29 #include <glib.h>
  30
  31 #include <epan/packet.h>
  32 /* XXX - try to remove this later */
  33 #include <epan/prefs.h>
  34 /* XXX - try to remove this later */
  35 #include <epan/filesystem.h>
  36
  37 #include "capture_info.h"
  38
  39 #include <epan/dissectors/packet-ap1394.h>
  40 #include <epan/dissectors/packet-atalk.h>
  41 #include <epan/dissectors/packet-atm.h>
  42 #include <epan/dissectors/packet-ax25.h>
  43 #include <epan/dissectors/packet-clip.h>
  44 #include <epan/dissectors/packet-eth.h>
  45 #include <epan/dissectors/packet-fddi.h>
  46 #include <epan/dissectors/packet-fr.h>
  47 #include <epan/dissectors/packet-null.h>
  48 #include <epan/dissectors/packet-ppi.h>
  49 #include <epan/dissectors/packet-ppp.h>
  50 #include <epan/dissectors/packet-raw.h>
  51 #include <epan/dissectors/packet-sll.h>
  52 #include <epan/dissectors/packet-tr.h>
  53 #include <epan/dissectors/packet-ieee80211.h>
  54 #include <epan/dissectors/packet-ieee80211-radiotap.h>
  55 #include <epan/dissectors/packet-chdlc.h>
  56 #include <epan/dissectors/packet-ipfc.h>
  57 #include <epan/dissectors/packet-arcnet.h>
  58 #include <epan/dissectors/packet-enc.h>
  59 #include <epan/dissectors/packet-i2c.h>
  60 #include <epan/dissectors/packet-ax25-kiss.h>
  61
  62 static void capture_info_packet(
  63 packet_counts *counts, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header);
  64
  65
  66
  67 typedef struct _info_data {
  68     packet_counts     counts;     /* several packet type counters */
  69     struct wtap*      wtap;       /* current wtap file */
  70     capture_info      ui;         /* user interface data */
  71 } info_data_t;
  72
  73
  74 static info_data_t info_data;
  75
  76
  77 /* open the info */
  78 void capture_info_open(capture_session *cap_session)
  79 {
  80     info_data.counts.total      = 0;
  81     info_data.counts.sctp       = 0;
  82     info_data.counts.tcp        = 0;
  83     info_data.counts.udp        = 0;
  84     info_data.counts.icmp       = 0;
  85     info_data.counts.ospf       = 0;
  86     info_data.counts.gre        = 0;
  87     info_data.counts.ipx        = 0;
  88     info_data.counts.netbios    = 0;
  89     info_data.counts.vines      = 0;
  90     info_data.counts.other      = 0;
  91     info_data.counts.arp        = 0;
  92     info_data.counts.i2c_event  = 0;
  93     info_data.counts.i2c_data   = 0;
  94
  95     info_data.wtap = NULL;
  96     info_data.ui.counts = &info_data.counts;
  97
  98     capture_info_ui_create(&info_data.ui, cap_session);
  99 }
 100
 101
 102 static const char *
 103 cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
 104                       int file_type)
 105 {
 106     const char *errmsg;
 107     static char errmsg_errno[1024+1];
 108
 109     if (err < 0) {
 110         /* Wiretap error. */
 111         switch (err) {
 112
 113         case WTAP_ERR_NOT_REGULAR_FILE:
 114             errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
 115             break;
 116
 117         case WTAP_ERR_FILE_UNKNOWN_FORMAT:
 118             /* Seen only when opening a capture file for reading. */
 119             errmsg = "The file \"%s\" isn't a capture file in a format TShark understands.";
 120             break;
 121
 122         case WTAP_ERR_UNSUPPORTED:
 123             /* Seen only when opening a capture file for reading. */
 124             g_snprintf(errmsg_errno, sizeof(errmsg_errno),
 125                        "The file \"%%s\" isn't a capture file in a format TShark understands.\n"
 126                        "(%s)", err_info);
 127             g_free(err_info);
 128             errmsg = errmsg_errno;
 129             break;
 130
 131         case WTAP_ERR_CANT_WRITE_TO_PIPE:
 132             /* Seen only when opening a capture file for writing. */
 133             g_snprintf(errmsg_errno, sizeof(errmsg_errno),
 134                        "The file \"%%s\" is a pipe, and %s capture files can't be "
 135                        "written to a pipe.", wtap_file_type_subtype_string(file_type));
 136             errmsg = errmsg_errno;
 137             break;
 138
 139         case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
 140             /* Seen only when opening a capture file for writing. */
 141             errmsg = "TShark doesn't support writing capture files in that format.";
 142             break;
 143
 144         case WTAP_ERR_UNSUPPORTED_ENCAP:
 145             if (for_writing)
 146                 errmsg = "TShark can't save this capture in that format.";
 147             else {
 148                 g_snprintf(errmsg_errno, sizeof(errmsg_errno),
 149                            "The file \"%%s\" is a capture for a network type that TShark doesn't support.\n"
 150                            "(%s)", err_info);
 151                 g_free(err_info);
 152                 errmsg = errmsg_errno;
 153             }
 154             break;
 155
 156         case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
 157             if (for_writing)
 158                 errmsg = "TShark can't save this capture in that format.";
 159             else
 160                 errmsg = "The file \"%s\" is a capture for a network type that TShark doesn't support.";
 161             break;
 162
 163         case WTAP_ERR_BAD_FILE:
 164             /* Seen only when opening a capture file for reading. */
 165             g_snprintf(errmsg_errno, sizeof(errmsg_errno),
 166                        "The file \"%%s\" appears to be damaged or corrupt.\n"
 167                        "(%s)", err_info);
 168             g_free(err_info);
 169             errmsg = errmsg_errno;
 170             break;
 171
 172         case WTAP_ERR_CANT_OPEN:
 173             if (for_writing)
 174                 errmsg = "The file \"%s\" could not be created for some unknown reason.";
 175             else
 176                 errmsg = "The file \"%s\" could not be opened for some unknown reason.";
 177             break;
 178
 179         case WTAP_ERR_SHORT_READ:
 180             errmsg = "The file \"%s\" appears to have been cut short"
 181                 " in the middle of a packet or other data.";
 182             break;
 183
 184         case WTAP_ERR_SHORT_WRITE:
 185             errmsg = "A full header couldn't be written to the file \"%s\".";
 186             break;
 187
 188         case WTAP_ERR_DECOMPRESS:
 189             g_snprintf(errmsg_errno, sizeof(errmsg_errno),
 190                        "The compressed file \"%%s\" appears to be damaged or corrupt.\n"
 191                        "(%s)", err_info);
 192             g_free(err_info);
 193             errmsg = errmsg_errno;
 194             break;
 195
 196         default:
 197             g_snprintf(errmsg_errno, sizeof(errmsg_errno),
 198                        "The file \"%%s\" could not be %s: %s.",
 199                        for_writing ? "created" : "opened",
 200                        wtap_strerror(err));
 201             errmsg = errmsg_errno;
 202             break;
 203         }
 204     } else
 205         errmsg = file_open_error_message(err, for_writing);
 206     return errmsg;
 207 }
 208
 209 /* new file arrived */
 210 gboolean capture_info_new_file(const char *new_filename)
 211 {
 212     int err;
 213     gchar *err_info;
 214     gchar *err_msg;
 215
 216
 217     if(info_data.wtap != NULL) {
 218         wtap_close(info_data.wtap);
 219     }
 220
 221     info_data.wtap = wtap_open_offline(new_filename, &err, &err_info, FALSE);
 222     if (!info_data.wtap) {
 223         err_msg = g_strdup_printf(cf_open_error_message(err, err_info, FALSE, WTAP_FILE_TYPE_SUBTYPE_UNKNOWN),
 224                                   new_filename);
 225         g_warning("capture_info_new_file: %d (%s)", err, err_msg);
 226         g_free (err_msg);
 227         return FALSE;
 228     } else
 229         return TRUE;
 230 }
 231
 232
 233 /* new packets arrived */
 234 void capture_info_new_packets(int to_read)
 235 {
 236     int err;
 237     gchar *err_info;
 238     gint64 data_offset;
 239     struct wtap_pkthdr *phdr;
 240     union wtap_pseudo_header *pseudo_header;
 241     int wtap_linktype;
 242     const guchar *buf;
 243
 244
 245     info_data.ui.new_packets = to_read;
 246
 247     /*g_warning("new packets: %u", to_read);*/
 248
 249     while (to_read > 0) {
 250         wtap_cleareof(info_data.wtap);
 251         if (wtap_read(info_data.wtap, &err, &err_info, &data_offset)) {
 252             phdr = wtap_phdr(info_data.wtap);
 253             pseudo_header = &phdr->pseudo_header;
 254             wtap_linktype = phdr->pkt_encap;
 255             buf = wtap_buf_ptr(info_data.wtap);
 256
 257             capture_info_packet(&info_data.counts, wtap_linktype, buf, phdr->caplen, pseudo_header);
 258
 259             /*g_warning("new packet");*/
 260             to_read--;
 261         }
 262     }
 263
 264     capture_info_ui_update(&info_data.ui);
 265 }
 266
 267
 268 /* close the info */
 269 void capture_info_close(void)
 270 {
 271     capture_info_ui_destroy(&info_data.ui);
 272     if(info_data.wtap)
 273         wtap_close(info_data.wtap);
 274 }
 275
 276
 277 static void
 278 capture_info_packet(packet_counts *counts, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header)
 279 {
 280     counts->total++;
 281     switch (wtap_linktype) {
 282     case WTAP_ENCAP_ETHERNET:
 283         capture_eth(pd, 0, caplen, counts);
 284         break;
 285     case WTAP_ENCAP_FDDI:
 286     case WTAP_ENCAP_FDDI_BITSWAPPED:
 287         capture_fddi(pd, caplen, counts);
 288         break;
 289     case WTAP_ENCAP_IEEE_802_11_PRISM:
 290         capture_prism(pd, 0, caplen, counts);
 291         break;
 292     case WTAP_ENCAP_TOKEN_RING:
 293         capture_tr(pd, 0, caplen, counts);
 294         break;
 295     case WTAP_ENCAP_NULL:
 296         capture_null(pd, caplen, counts);
 297         break;
 298     case WTAP_ENCAP_PPP:
 299         capture_ppp_hdlc(pd, 0, caplen, counts);
 300         break;
 301     case WTAP_ENCAP_RAW_IP:
 302         capture_raw(pd, caplen, counts);
 303         break;
 304     case WTAP_ENCAP_SLL:
 305         capture_sll(pd, caplen, counts);
 306         break;
 307     case WTAP_ENCAP_LINUX_ATM_CLIP:
 308         capture_clip(pd, caplen, counts);
 309         break;
 310     case WTAP_ENCAP_IEEE_802_11:
 311     case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
 312         capture_ieee80211(pd, 0, caplen, counts);
 313         break;
 314     case WTAP_ENCAP_IEEE_802_11_RADIOTAP:
 315         capture_radiotap(pd, 0, caplen, counts);
 316         break;
 317     case WTAP_ENCAP_IEEE_802_11_AVS:
 318         capture_wlancap(pd, 0, caplen, counts);
 319         break;
 320     case WTAP_ENCAP_CHDLC:
 321         capture_chdlc(pd, 0, caplen, counts);
 322         break;
 323     case WTAP_ENCAP_LOCALTALK:
 324         capture_llap(counts);
 325         break;
 326     case WTAP_ENCAP_ATM_PDUS:
 327         capture_atm(pseudo_header, pd, caplen, counts);
 328         break;
 329     case WTAP_ENCAP_IP_OVER_FC:
 330         capture_ipfc(pd, caplen, counts);
 331         break;
 332     case WTAP_ENCAP_ARCNET:
 333         capture_arcnet(pd, caplen, counts, FALSE, TRUE);
 334         break;
 335     case WTAP_ENCAP_ARCNET_LINUX:
 336         capture_arcnet(pd, caplen, counts, TRUE, FALSE);
 337         break;
 338     case WTAP_ENCAP_APPLE_IP_OVER_IEEE1394:
 339         capture_ap1394(pd, 0, caplen, counts);
 340         break;
 341     case WTAP_ENCAP_FRELAY:
 342     case WTAP_ENCAP_FRELAY_WITH_PHDR:
 343         capture_fr(pd, 0, caplen, counts);
 344         break;
 345     case WTAP_ENCAP_ENC:
 346         capture_enc(pd, caplen, counts);
 347         break;
 348     case WTAP_ENCAP_PPI:
 349         capture_ppi(pd, caplen, counts);
 350         break;
 351     case WTAP_ENCAP_I2C:
 352         capture_i2c(pseudo_header, counts);
 353         break;
 354     case WTAP_ENCAP_AX25_KISS:
 355         capture_ax25_kiss(pd, 0, caplen, counts);
 356         break;
 357     case WTAP_ENCAP_AX25:
 358         capture_ax25(pd, 0, caplen, counts);
 359         break;
 360         /* XXX - some ATM drivers on FreeBSD might prepend a 4-byte ATM
 361            pseudo-header to DLT_ATM_RFC1483, with LLC header following;
 362            we might have to implement that at some point. */
 363     }
 364 }
 365
 366
 367 #endif /* HAVE_LIBPCAP */