capture_info.c

   1 /* capture_info.c
   2  * capture info functions
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * SPDX-License-Identifier: GPL-2.0-or-later
   9  */
  10
  11 #include <config.h>
  12
  13 #ifdef HAVE_LIBPCAP
  14
  15 #include <glib.h>
  16
  17 #include <epan/packet.h>
  18 #include <wiretap/wtap.h>
  19
  20 #include "capture_info.h"
  21
  22 #include <epan/capture_dissectors.h>
  23
  24 static void
  25 capture_info_packet(info_data_t* cap_info, gint wtap_linktype, const guchar *pd, guint32 caplen, union wtap_pseudo_header *pseudo_header)
  26 {
  27     capture_packet_info_t cpinfo;
  28
  29     /* Setup the capture packet structure */
  30     cpinfo.counts = cap_info->counts.counts_hash;
  31
  32     cap_info->counts.total++;
  33     if (!try_capture_dissector("wtap_encap", wtap_linktype, pd, 0, caplen, &cpinfo, pseudo_header))
  34         cap_info->counts.other++;
  35 }
  36
  37 /* new packets arrived */
  38 void capture_info_new_packets(int to_read, info_data_t* cap_info)
  39 {
  40     int err;
  41     gchar *err_info;
  42     gint64 data_offset;
  43     wtap_rec *rec;
  44     union wtap_pseudo_header *pseudo_header;
  45     int wtap_linktype;
  46     const guchar *buf;
  47
  48
  49     cap_info->ui.new_packets = to_read;
  50
  51     /*g_warning("new packets: %u", to_read);*/
  52
  53     while (to_read > 0) {
  54         wtap_cleareof(cap_info->wtap);
  55         if (wtap_read(cap_info->wtap, &err, &err_info, &data_offset)) {
  56             rec = wtap_get_rec(cap_info->wtap);
  57             if (rec->rec_type == REC_TYPE_PACKET) {
  58                 pseudo_header = &rec->rec_header.packet_header.pseudo_header;
  59                 wtap_linktype = rec->rec_header.packet_header.pkt_encap;
  60                 buf = wtap_get_buf_ptr(cap_info->wtap);
  61
  62                 capture_info_packet(cap_info, wtap_linktype, buf, rec->rec_header.packet_header.caplen, pseudo_header);
  63
  64                 /*g_warning("new packet");*/
  65                 to_read--;
  66             }
  67         }
  68     }
  69
  70     capture_info_ui_update(&cap_info->ui);
  71 }
  72
  73 #endif /* HAVE_LIBPCAP */
  74
  75 /*
  76  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
  77  *
  78  * Local variables:
  79  * c-basic-offset: 4
  80  * tab-width: 8
  81  * indent-tabs-mode: nil
  82  * End:
  83  *
  84  * vi: set shiftwidth=4 tabstop=8 expandtab:
  85  * :indentSize=4:tabSize=8:noTabs=true:
  86  */