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wireshark/capture_info.c
Guy Harris 8ac0325b2b Clean up indentation a bit. 
In "capture_input_new_file()", don't call the callbacks unless we
succeed in opening the new file.  Have "capture_info_new_file()" return
a success/failure indication.

Improve the message logged when we fail to open the new file if we're
only opening it for the quick packet counts.  We really should put up an
alert box and give up on the capture at that point.

svn path=/trunk/; revision=17437
2006-03-01 01:46:52 +00:00

339 lines
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C
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/* capture_info.c
* capture info functions
*
* $Id$
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_LIBPCAP
#include <glib.h>
#include <epan/packet.h>
/* XXX - try to remove this later */
#include <epan/prefs.h>
/* XXX - try to remove this later */
#include <epan/filesystem.h>
#include "capture_info.h"
#include <epan/dissectors/packet-ap1394.h>
#include <epan/dissectors/packet-atalk.h>
#include <epan/dissectors/packet-atm.h>
#include <epan/dissectors/packet-clip.h>
#include <epan/dissectors/packet-eth.h>
#include <epan/dissectors/packet-fddi.h>
#include <epan/dissectors/packet-fr.h>
#include <epan/dissectors/packet-null.h>
#include <epan/dissectors/packet-ppp.h>
#include <epan/dissectors/packet-raw.h>
#include <epan/dissectors/packet-sll.h>
#include <epan/dissectors/packet-tr.h>
#include <epan/dissectors/packet-ieee80211.h>
#include <epan/dissectors/packet-radiotap.h>
#include <epan/dissectors/packet-chdlc.h>
#include <epan/dissectors/packet-prism.h>
#include <epan/dissectors/packet-ipfc.h>
#include <epan/dissectors/packet-arcnet.h>
#include <epan/dissectors/packet-enc.h>
static void capture_info_packet(
packet_counts *counts, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header);
typedef struct _info_data {
packet_counts counts; /* several packet type counters */
struct wtap* wtap; /* current wtap file */
capture_info ui; /* user interface data */
} info_data_t;
info_data_t info_data;
/* open the info */
void capture_info_open(const char *iface)
{
info_data.counts.total = 0;
info_data.counts.sctp = 0;
info_data.counts.tcp = 0;
info_data.counts.udp = 0;
info_data.counts.icmp = 0;
info_data.counts.ospf = 0;
info_data.counts.gre = 0;
info_data.counts.ipx = 0;
info_data.counts.netbios = 0;
info_data.counts.vines = 0;
info_data.counts.other = 0;
info_data.counts.arp = 0;
info_data.wtap = NULL;
info_data.ui.counts = &info_data.counts;
capture_info_ui_create(&info_data.ui, iface);
}
static const char *
cf_open_error_message(int err, gchar *err_info, gboolean for_writing,
int file_type)
{
const char *errmsg;
static char errmsg_errno[1024+1];
if (err < 0) {
/* Wiretap error. */
switch (err) {
case WTAP_ERR_NOT_REGULAR_FILE:
errmsg = "The file \"%s\" is a \"special file\" or socket or other non-regular file.";
break;
case WTAP_ERR_FILE_UNKNOWN_FORMAT:
/* Seen only when opening a capture file for reading. */
errmsg = "The file \"%s\" isn't a capture file in a format Tethereal understands.";
break;
case WTAP_ERR_UNSUPPORTED:
/* Seen only when opening a capture file for reading. */
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
"The file \"%%s\" isn't a capture file in a format Tethereal understands.\n"
"(%s)", err_info);
g_free(err_info);
errmsg = errmsg_errno;
break;
case WTAP_ERR_CANT_WRITE_TO_PIPE:
/* Seen only when opening a capture file for writing. */
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
"The file \"%%s\" is a pipe, and %s capture files can't be "
"written to a pipe.", wtap_file_type_string(file_type));
errmsg = errmsg_errno;
break;
case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
/* Seen only when opening a capture file for writing. */
errmsg = "Tethereal doesn't support writing capture files in that format.";
break;
case WTAP_ERR_UNSUPPORTED_ENCAP:
if (for_writing)
errmsg = "Tethereal can't save this capture in that format.";
else {
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
"The file \"%%s\" is a capture for a network type that Tethereal doesn't support.\n"
"(%s)", err_info);
g_free(err_info);
errmsg = errmsg_errno;
}
break;
case WTAP_ERR_ENCAP_PER_PACKET_UNSUPPORTED:
if (for_writing)
errmsg = "Tethereal can't save this capture in that format.";
else
errmsg = "The file \"%s\" is a capture for a network type that Tethereal doesn't support.";
break;
case WTAP_ERR_BAD_RECORD:
/* Seen only when opening a capture file for reading. */
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
"The file \"%%s\" appears to be damaged or corrupt.\n"
"(%s)", err_info);
g_free(err_info);
errmsg = errmsg_errno;
break;
case WTAP_ERR_CANT_OPEN:
if (for_writing)
errmsg = "The file \"%s\" could not be created for some unknown reason.";
else
errmsg = "The file \"%s\" could not be opened for some unknown reason.";
break;
case WTAP_ERR_SHORT_READ:
errmsg = "The file \"%s\" appears to have been cut short"
" in the middle of a packet or other data.";
break;
case WTAP_ERR_SHORT_WRITE:
errmsg = "A full header couldn't be written to the file \"%s\".";
break;
default:
g_snprintf(errmsg_errno, sizeof(errmsg_errno),
"The file \"%%s\" could not be %s: %s.",
for_writing ? "created" : "opened",
wtap_strerror(err));
errmsg = errmsg_errno;
break;
}
} else
errmsg = file_open_error_message(err, for_writing);
return errmsg;
}
/* new file arrived */
gboolean capture_info_new_file(const char *new_filename)
{
int err;
gchar *err_info;
char err_msg[2048+1];
if(info_data.wtap != NULL) {
wtap_close(info_data.wtap);
}
info_data.wtap = wtap_open_offline(new_filename, &err, &err_info, FALSE);
if (!info_data.wtap) {
g_snprintf(err_msg, sizeof err_msg,
cf_open_error_message(err, err_info, FALSE, WTAP_FILE_PCAP),
new_filename);
g_warning("capture_info_new_file: %s", err_msg);
return FALSE;
} else
return TRUE;
}
/* new packets arrived */
void capture_info_new_packets(int to_read)
{
int err;
gchar *err_info;
long data_offset;
const struct wtap_pkthdr *phdr;
union wtap_pseudo_header *pseudo_header;
int wtap_linktype;
const guchar *buf;
info_data.ui.new_packets = to_read;
/*g_warning("new packets: %u", to_read);*/
while (to_read != 0 && (wtap_read(info_data.wtap, &err, &err_info, &data_offset))) {
phdr = wtap_phdr(info_data.wtap);
pseudo_header = wtap_pseudoheader(info_data.wtap);
wtap_linktype = phdr->pkt_encap;
buf = wtap_buf_ptr(info_data.wtap);
capture_info_packet(&info_data.counts, wtap_linktype, buf, phdr->caplen, pseudo_header);
/*g_warning("new packet");*/
to_read--;
}
capture_info_ui_update(&info_data.ui);
}
/* close the info */
void capture_info_close(void)
{
capture_info_ui_destroy(&info_data.ui);
if(info_data.wtap)
wtap_close(info_data.wtap);
}
static void
capture_info_packet(packet_counts *counts, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header)
{
counts->total++;
switch (wtap_linktype) {
case WTAP_ENCAP_ETHERNET:
capture_eth(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_FDDI:
case WTAP_ENCAP_FDDI_BITSWAPPED:
capture_fddi(pd, caplen, counts);
break;
case WTAP_ENCAP_PRISM_HEADER:
capture_prism(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_TOKEN_RING:
capture_tr(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_NULL:
capture_null(pd, caplen, counts);
break;
case WTAP_ENCAP_PPP:
capture_ppp_hdlc(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_RAW_IP:
capture_raw(pd, caplen, counts);
break;
case WTAP_ENCAP_SLL:
capture_sll(pd, caplen, counts);
break;
case WTAP_ENCAP_LINUX_ATM_CLIP:
capture_clip(pd, caplen, counts);
break;
case WTAP_ENCAP_IEEE_802_11:
case WTAP_ENCAP_IEEE_802_11_WITH_RADIO:
capture_ieee80211(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_IEEE_802_11_WLAN_RADIOTAP:
capture_radiotap(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_CHDLC:
capture_chdlc(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_LOCALTALK:
capture_llap(counts);
break;
case WTAP_ENCAP_ATM_PDUS:
capture_atm(pseudo_header, pd, caplen, counts);
break;
case WTAP_ENCAP_IP_OVER_FC:
capture_ipfc(pd, caplen, counts);
break;
case WTAP_ENCAP_ARCNET:
capture_arcnet(pd, caplen, counts, FALSE, TRUE);
break;
case WTAP_ENCAP_ARCNET_LINUX:
capture_arcnet(pd, caplen, counts, TRUE, FALSE);
break;
case WTAP_ENCAP_APPLE_IP_OVER_IEEE1394:
capture_ap1394(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_FRELAY:
case WTAP_ENCAP_FRELAY_WITH_PHDR:
capture_fr(pd, 0, caplen, counts);
break;
case WTAP_ENCAP_ENC:
capture_enc(pd, caplen, counts);
break;
/* XXX - some ATM drivers on FreeBSD might prepend a 4-byte ATM
pseudo-header to DLT_ATM_RFC1483, with LLC header following;
we might have to implement that at some point. */
}
}
#endif /* HAVE_LIBPCAP */
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