file_packet_provider.c

   1 /* file_packet_provider_data.c
   2  * Routines for a packet_provider_data for packets from a file.
   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 #include "config.h"
  11
  12 #include <stdint.h>
  13 #include <glib.h>
  14 #include "cfile.h"
  15
  16 const nstime_t *
  17 cap_file_provider_get_frame_ts(struct packet_provider_data *prov, uint32_t frame_num)
  18 {
  19     const frame_data *fd = NULL;
  20
  21     if (prov->ref && prov->ref->num == frame_num) {
  22         fd = prov->ref;
  23     } else if (prov->prev_dis && prov->prev_dis->num == frame_num) {
  24         fd = prov->prev_dis;
  25     } else if (prov->prev_cap && prov->prev_cap->num == frame_num) {
  26         fd = prov->prev_cap;
  27     } else if (prov->frames) {
  28         fd = frame_data_sequence_find(prov->frames, frame_num);
  29     }
  30
  31     return (fd && fd->has_ts) ? &fd->abs_ts : NULL;
  32 }
  33
  34 static int
  35 frame_cmp(const void *a, const void *b, void *user_data _U_)
  36 {
  37   const frame_data *fdata1 = (const frame_data *) a;
  38   const frame_data *fdata2 = (const frame_data *) b;
  39
  40   return (fdata1->num < fdata2->num) ? -1 :
  41     (fdata1->num > fdata2->num) ? 1 :
  42     0;
  43 }
  44
  45 const char *
  46 cap_file_provider_get_interface_name(struct packet_provider_data *prov, uint32_t interface_id, unsigned section_number)
  47 {
  48   wtapng_iface_descriptions_t *idb_info;
  49   wtap_block_t wtapng_if_descr = NULL;
  50   char* interface_name;
  51
  52   idb_info = wtap_file_get_idb_info(prov->wth);
  53
  54   unsigned gbl_iface_id = wtap_file_get_shb_global_interface_id(prov->wth, section_number, interface_id);
  55
  56   if (gbl_iface_id < idb_info->interface_data->len)
  57     wtapng_if_descr = g_array_index(idb_info->interface_data, wtap_block_t, gbl_iface_id);
  58
  59   g_free(idb_info);
  60
  61   if (wtapng_if_descr) {
  62     if (wtap_block_get_string_option_value(wtapng_if_descr, OPT_IDB_NAME, &interface_name) == WTAP_OPTTYPE_SUCCESS)
  63       return interface_name;
  64     if (wtap_block_get_string_option_value(wtapng_if_descr, OPT_IDB_DESCRIPTION, &interface_name) == WTAP_OPTTYPE_SUCCESS)
  65       return interface_name;
  66     if (wtap_block_get_string_option_value(wtapng_if_descr, OPT_IDB_HARDWARE, &interface_name) == WTAP_OPTTYPE_SUCCESS)
  67       return interface_name;
  68   }
  69   return "unknown";
  70 }
  71
  72 const char *
  73 cap_file_provider_get_interface_description(struct packet_provider_data *prov, uint32_t interface_id, unsigned section_number)
  74 {
  75   wtapng_iface_descriptions_t *idb_info;
  76   wtap_block_t wtapng_if_descr = NULL;
  77   char* interface_name;
  78
  79   idb_info = wtap_file_get_idb_info(prov->wth);
  80
  81   interface_id = wtap_file_get_shb_global_interface_id(prov->wth, section_number, interface_id);
  82
  83   if (interface_id < idb_info->interface_data->len)
  84     wtapng_if_descr = g_array_index(idb_info->interface_data, wtap_block_t, interface_id);
  85
  86   g_free(idb_info);
  87
  88   if (wtapng_if_descr) {
  89     if (wtap_block_get_string_option_value(wtapng_if_descr, OPT_IDB_DESCRIPTION, &interface_name) == WTAP_OPTTYPE_SUCCESS)
  90       return interface_name;
  91   }
  92   return NULL;
  93 }
  94
  95 wtap_block_t
  96 cap_file_provider_get_modified_block(struct packet_provider_data *prov, const frame_data *fd)
  97 {
  98   if (prov->frames_modified_blocks)
  99      return (wtap_block_t)g_tree_lookup(prov->frames_modified_blocks, fd);
 100
 101   /* ws_warning? */
 102   return NULL;
 103 }
 104
 105 void
 106 cap_file_provider_set_modified_block(struct packet_provider_data *prov, frame_data *fd, const wtap_block_t new_block)
 107 {
 108   if (!prov->frames_modified_blocks)
 109     prov->frames_modified_blocks = g_tree_new_full(frame_cmp, NULL, NULL, (GDestroyNotify)wtap_block_unref);
 110
 111   /* insert new packet block */
 112   g_tree_replace(prov->frames_modified_blocks, fd, (void *)new_block);
 113
 114   fd->has_modified_block = 1;
 115 }