![Guy Harris](/assets/img/avatar_default.png)
That's a little cleaner, and lets us preserve the LINKTYPE_ value for DLT_LOOP captures. ("Preserve" here doesn't mean "write files with a link-layer header type of 12", as that's ambiguous; we write it with a link-layer header type of LINKTYPE_LOOP, i.e. 108. If programs on OpenBSD don't recognize that as DLT_LOOP, that's a bug in OpenBSD's libpcap or in the program.) Change-Id: I48a2e04aed41c013823ffb5c588d2a8e8b376e15 Reviewed-on: https://code.wireshark.org/review/7143 Reviewed-by: Guy Harris <guy@alum.mit.edu>
387 lines
12 KiB
C
387 lines
12 KiB
C
/* capture_info.c
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* capture info functions
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#ifdef HAVE_LIBPCAP
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#include <glib.h>
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#include <epan/packet.h>
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/* XXX - try to remove this later */
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#include <epan/prefs.h>
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/* XXX - try to remove this later */
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#include <wiretap/wtap.h>
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#include "capture_info.h"
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#include <epan/dissectors/packet-ap1394.h>
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#include <epan/dissectors/packet-atalk.h>
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#include <epan/dissectors/packet-atm.h>
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#include <epan/dissectors/packet-ax25.h>
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#include <epan/dissectors/packet-clip.h>
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#include <epan/dissectors/packet-eth.h>
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#include <epan/dissectors/packet-fddi.h>
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#include <epan/dissectors/packet-fr.h>
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#include <epan/dissectors/packet-null.h>
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#include <epan/dissectors/packet-ppi.h>
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#include <epan/dissectors/packet-ppp.h>
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#include <epan/dissectors/packet-raw.h>
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#include <epan/dissectors/packet-sll.h>
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#include <epan/dissectors/packet-tr.h>
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#include <epan/dissectors/packet-ieee80211.h>
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#include <epan/dissectors/packet-ieee80211-radiotap.h>
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#include <epan/dissectors/packet-chdlc.h>
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#include <epan/dissectors/packet-ipfc.h>
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#include <epan/dissectors/packet-arcnet.h>
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#include <epan/dissectors/packet-enc.h>
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#include <epan/dissectors/packet-i2c.h>
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#include <epan/dissectors/packet-ax25-kiss.h>
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#include <epan/dissectors/packet-pktap.h>
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#include <wsutil/filesystem.h>
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static void capture_info_packet(
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packet_counts *counts, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header);
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typedef struct _info_data {
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packet_counts counts; /* several packet type counters */
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struct wtap* wtap; /* current wtap file */
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capture_info ui; /* user interface data */
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} info_data_t;
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static info_data_t info_data;
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/* open the info */
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void capture_info_open(capture_session *cap_session)
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{
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info_data.counts.total = 0;
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info_data.counts.sctp = 0;
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info_data.counts.tcp = 0;
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info_data.counts.udp = 0;
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info_data.counts.icmp = 0;
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info_data.counts.ospf = 0;
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info_data.counts.gre = 0;
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info_data.counts.ipx = 0;
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info_data.counts.netbios = 0;
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info_data.counts.vines = 0;
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info_data.counts.other = 0;
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info_data.counts.arp = 0;
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info_data.counts.i2c_event = 0;
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info_data.counts.i2c_data = 0;
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info_data.wtap = NULL;
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info_data.ui.counts = &info_data.counts;
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capture_info_ui_create(&info_data.ui, cap_session);
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}
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static const char *
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cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
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int file_type)
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{
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const char *errmsg;
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static char errmsg_errno[1024+1];
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if (err < 0) {
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/* Wiretap error. */
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switch (err) {
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case WTAP_ERR_NOT_REGULAR_FILE:
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errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
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break;
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case WTAP_ERR_FILE_UNKNOWN_FORMAT:
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/* Seen only when opening a capture file for reading. */
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errmsg = "The file \"%s\" isn't a capture file in a format Wireshark understands.";
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break;
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case WTAP_ERR_UNSUPPORTED:
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/* Seen only when opening a capture file for reading. */
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g_snprintf(errmsg_errno, sizeof(errmsg_errno),
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"The file \"%%s\" contains record data that Wireshark doesn't support.\n"
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"(%s)", err_info != NULL ? err_info : "no information supplied");
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g_free(err_info);
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errmsg = errmsg_errno;
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break;
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case WTAP_ERR_CANT_WRITE_TO_PIPE:
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/* Seen only when opening a capture file for writing. */
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g_snprintf(errmsg_errno, sizeof(errmsg_errno),
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"The file \"%%s\" is a pipe, and %s capture files can't be "
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"written to a pipe.", wtap_file_type_subtype_string(file_type));
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errmsg = errmsg_errno;
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break;
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case WTAP_ERR_UNWRITABLE_FILE_TYPE:
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/* Seen only when opening a capture file for writing. */
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errmsg = "Wireshark doesn't support writing capture files in that format.";
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break;
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case WTAP_ERR_UNWRITABLE_ENCAP:
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/* Seen only when opening a capture file for writing. */
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errmsg = "Wireshark can't save this capture in that format.";
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break;
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case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
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if (for_writing)
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errmsg = "Wireshark can't save this capture in that format.";
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else
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errmsg = "The file \"%s\" is a capture for a network type that Wireshark doesn't support.";
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break;
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case WTAP_ERR_BAD_FILE:
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/* Seen only when opening a capture file for reading. */
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g_snprintf(errmsg_errno, sizeof(errmsg_errno),
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"The file \"%%s\" appears to be damaged or corrupt.\n"
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"(%s)", err_info != NULL ? err_info : "no information supplied");
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g_free(err_info);
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errmsg = errmsg_errno;
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break;
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case WTAP_ERR_CANT_OPEN:
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if (for_writing)
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errmsg = "The file \"%s\" could not be created for some unknown reason.";
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else
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errmsg = "The file \"%s\" could not be opened for some unknown reason.";
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break;
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case WTAP_ERR_SHORT_READ:
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errmsg = "The file \"%s\" appears to have been cut short"
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" in the middle of a packet or other data.";
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break;
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case WTAP_ERR_SHORT_WRITE:
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errmsg = "A full header couldn't be written to the file \"%s\".";
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break;
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case WTAP_ERR_DECOMPRESS:
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g_snprintf(errmsg_errno, sizeof(errmsg_errno),
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"The compressed file \"%%s\" appears to be damaged or corrupt.\n"
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"(%s)", err_info != NULL ? err_info : "no information supplied");
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g_free(err_info);
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errmsg = errmsg_errno;
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break;
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default:
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g_snprintf(errmsg_errno, sizeof(errmsg_errno),
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"The file \"%%s\" could not be %s: %s.",
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for_writing ? "created" : "opened",
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wtap_strerror(err));
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errmsg = errmsg_errno;
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break;
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}
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} else
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errmsg = file_open_error_message(err, for_writing);
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return errmsg;
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}
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/* new file arrived */
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gboolean capture_info_new_file(const char *new_filename)
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{
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int err;
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gchar *err_info;
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gchar *err_msg;
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if(info_data.wtap != NULL) {
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wtap_close(info_data.wtap);
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}
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info_data.wtap = wtap_open_offline(new_filename, WTAP_TYPE_AUTO, &err, &err_info, FALSE);
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if (!info_data.wtap) {
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err_msg = g_strdup_printf(cf_open_error_message(err, err_info, FALSE, WTAP_FILE_TYPE_SUBTYPE_UNKNOWN),
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new_filename);
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g_warning("capture_info_new_file: %d (%s)", err, err_msg);
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g_free (err_msg);
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return FALSE;
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} else
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return TRUE;
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}
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/* new packets arrived */
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void capture_info_new_packets(int to_read)
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{
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int err;
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gchar *err_info;
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gint64 data_offset;
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struct wtap_pkthdr *phdr;
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union wtap_pseudo_header *pseudo_header;
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int wtap_linktype;
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const guchar *buf;
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info_data.ui.new_packets = to_read;
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/*g_warning("new packets: %u", to_read);*/
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while (to_read > 0) {
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wtap_cleareof(info_data.wtap);
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if (wtap_read(info_data.wtap, &err, &err_info, &data_offset)) {
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phdr = wtap_phdr(info_data.wtap);
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pseudo_header = &phdr->pseudo_header;
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wtap_linktype = phdr->pkt_encap;
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buf = wtap_buf_ptr(info_data.wtap);
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capture_info_packet(&info_data.counts, wtap_linktype, buf, phdr->caplen, pseudo_header);
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/*g_warning("new packet");*/
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to_read--;
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}
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}
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capture_info_ui_update(&info_data.ui);
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}
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/* close the info */
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void capture_info_close(void)
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{
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capture_info_ui_destroy(&info_data.ui);
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if(info_data.wtap)
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wtap_close(info_data.wtap);
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}
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static void
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capture_info_packet(packet_counts *counts, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header)
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{
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counts->total++;
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switch (wtap_linktype) {
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case WTAP_ENCAP_ETHERNET:
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capture_eth(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_FDDI:
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case WTAP_ENCAP_FDDI_BITSWAPPED:
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capture_fddi(pd, caplen, counts);
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break;
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case WTAP_ENCAP_IEEE_802_11_PRISM:
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capture_prism(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_TOKEN_RING:
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capture_tr(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_NULL:
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capture_null(pd, caplen, counts);
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break;
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case WTAP_ENCAP_LOOP:
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capture_loop(pd, caplen, counts);
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break;
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case WTAP_ENCAP_PPP:
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capture_ppp_hdlc(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_RAW_IP:
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capture_raw(pd, caplen, counts);
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break;
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case WTAP_ENCAP_SLL:
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capture_sll(pd, caplen, counts);
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break;
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case WTAP_ENCAP_LINUX_ATM_CLIP:
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capture_clip(pd, caplen, counts);
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break;
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case WTAP_ENCAP_IEEE_802_11:
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case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
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capture_ieee80211(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_IEEE_802_11_RADIOTAP:
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capture_radiotap(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_IEEE_802_11_AVS:
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capture_wlancap(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_CHDLC:
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capture_chdlc(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_LOCALTALK:
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capture_llap(counts);
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break;
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case WTAP_ENCAP_ATM_PDUS:
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capture_atm(pseudo_header, pd, caplen, counts);
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break;
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case WTAP_ENCAP_IP_OVER_FC:
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capture_ipfc(pd, caplen, counts);
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break;
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case WTAP_ENCAP_ARCNET:
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capture_arcnet(pd, caplen, counts, FALSE, TRUE);
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break;
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case WTAP_ENCAP_ARCNET_LINUX:
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capture_arcnet(pd, caplen, counts, TRUE, FALSE);
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break;
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case WTAP_ENCAP_APPLE_IP_OVER_IEEE1394:
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capture_ap1394(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_FRELAY:
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case WTAP_ENCAP_FRELAY_WITH_PHDR:
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capture_fr(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_ENC:
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capture_enc(pd, caplen, counts);
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break;
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case WTAP_ENCAP_PPI:
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capture_ppi(pd, caplen, counts);
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break;
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case WTAP_ENCAP_I2C:
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capture_i2c(pseudo_header, counts);
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break;
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case WTAP_ENCAP_AX25_KISS:
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capture_ax25_kiss(pd, 0, caplen, counts);
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break;
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case WTAP_ENCAP_AX25:
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capture_ax25(pd, 0, caplen, counts);
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break;
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/* XXX - some ATM drivers on FreeBSD might prepend a 4-byte ATM
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pseudo-header to DLT_ATM_RFC1483, with LLC header following;
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we might have to implement that at some point. */
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case WTAP_ENCAP_PKTAP:
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case WTAP_ENCAP_USER2:
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/* XXX - WTAP_ENCAP_USER2 to handle Mavericks' botch wherein it
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uses DLT_USER2 for PKTAP; if you are using DLT_USER2 for your
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own purposes, feel free to call your own capture_ routine for
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WTAP_ENCAP_USER2. */
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capture_pktap(pd, caplen, counts);
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break;
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}
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}
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#endif /* HAVE_LIBPCAP */
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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