epan/frame_data.h

   1 /* frame_data.h
   2  * Definitions for frame_data structures and routines
   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 #ifndef __FRAME_DATA_H__
  26 #define __FRAME_DATA_H__
  27
  28 #include <epan/column-info.h>
  29 #include <epan/tvbuff.h>
  30 #include <wsutil/nstime.h>
  31 #include <wiretap/wtap.h>
  32 #include "ws_symbol_export.h"
  33
  34 #define PINFO_FD_NUM(pinfo)       ((pinfo)->fd->num)
  35 #define PINFO_FD_VISITED(pinfo)   ((pinfo)->fd->flags.visited)
  36
  37 /** @file
  38  * Low-level frame data and metadata.
  39  */
  40
  41 /** @defgroup framedata Frame Data
  42  *
  43  * @{
  44  */
  45
  46 /** @todo XXX - some of this stuff is used only while a packet is being dissected;
  47    should we keep that stuff in the "packet_info" structure, instead, to
  48    save memory? */
  49
  50 /* Types of character encodings */
  51 typedef enum {
  52         PACKET_CHAR_ENC_CHAR_ASCII       = 0,   /* ASCII */
  53         PACKET_CHAR_ENC_CHAR_EBCDIC      = 1    /* EBCDIC */
  54 } packet_char_enc;
  55
  56 /** The frame number is the ordinal number of the frame in the capture, so
  57    it's 1-origin.  In various contexts, 0 as a frame number means "frame
  58    number unknown". */
  59 typedef struct _frame_data {
  60   GSList      *pfd;          /**< Per frame proto data */
  61   guint32      num;          /**< Frame number */
  62   guint32      pkt_len;      /**< Packet length */
  63   guint32      cap_len;      /**< Amount actually captured */
  64   guint32      cum_bytes;    /**< Cumulative bytes into the capture */
  65   gint64       file_off;     /**< File offset */
  66   guint16      subnum;       /**< subframe number, for protocols that require this */
  67   gint16       lnk_t;        /**< Per-packet encapsulation/data-link type */
  68   struct {
  69     unsigned int passed_dfilter : 1; /**< 1 = display, 0 = no display */
  70     unsigned int dependent_of_displayed : 1; /**< 1 if a displayed frame depends on this frame */
  71     unsigned int encoding       : 1; /**< Character encoding (ASCII, EBCDIC...) */
  72     unsigned int visited        : 1; /**< Has this packet been visited yet? 1=Yes,0=No*/
  73     unsigned int marked         : 1; /**< 1 = marked by user, 0 = normal */
  74     unsigned int ref_time       : 1; /**< 1 = marked as a reference time frame, 0 = normal */
  75     unsigned int ignored        : 1; /**< 1 = ignore this frame, 0 = normal */
  76     unsigned int has_ts         : 1; /**< 1 = has time stamp, 0 = no time stamp */
  77     unsigned int has_phdr_comment : 1; /** 1 = there's comment for this packet */
  78     unsigned int has_user_comment : 1; /** 1 = user set (also deleted) comment for this packet */
  79   } flags;
  80
  81   const void *color_filter;  /**< Per-packet matching color_filter_t object */
  82
  83   nstime_t     abs_ts;       /**< Absolute timestamp */
  84   nstime_t     shift_offset; /**< How much the abs_tm of the frame is shifted */
  85   guint32      frame_ref_num; /**< Previous reference frame (0 if this is one) */
  86   guint32      prev_dis_num; /**< Previous displayed frame (0 if first one) */
  87 } frame_data;
  88
  89 #ifdef WANT_PACKET_EDITOR
  90 /* XXX, where this struct should go? */
  91 typedef struct {
  92   struct wtap_pkthdr phdr; /**< Modified packet header */
  93   char *pd;                /**< Modified packet data */
  94 } modified_frame_data;
  95 #endif
  96
  97 /* Utility routines used by packet*.c */
  98
  99 WS_DLL_PUBLIC void p_add_proto_data(frame_data *fd, int proto, guint8 key, void *proto_data);
 100 WS_DLL_PUBLIC void *p_get_proto_data(frame_data *fd, int proto, guint8 key);
 101 void p_remove_proto_data(frame_data *fd, int proto, guint8 key);
 102 gchar *p_get_proto_name_and_key(frame_data *fd, guint pfd_index);
 103
 104 /* no sense to include epan.h + dependencies for opaque epan session type */
 105 struct epan_session;
 106
 107 /** compare two frame_datas */
 108 WS_DLL_PUBLIC gint frame_data_compare(const struct epan_session *epan, const frame_data *fdata1, const frame_data *fdata2, int field);
 109
 110 WS_DLL_PUBLIC void frame_data_reset(frame_data *fdata);
 111
 112 WS_DLL_PUBLIC void frame_data_destroy(frame_data *fdata);
 113
 114 WS_DLL_PUBLIC void frame_data_init(frame_data *fdata, guint32 num,
 115                 const struct wtap_pkthdr *phdr, gint64 offset,
 116                 guint32 cum_bytes);
 117
 118 extern void frame_delta_abs_time(const struct epan_session *epan, const frame_data *fdata,
 119                 guint32 prev_num, nstime_t *delta);
 120 /**
 121  * Sets the frame data struct values before dissection.
 122  */
 123 WS_DLL_PUBLIC void frame_data_set_before_dissect(frame_data *fdata,
 124                 nstime_t *elapsed_time,
 125                 const frame_data **frame_ref,
 126                 const frame_data *prev_dis);
 127
 128 WS_DLL_PUBLIC void frame_data_set_after_dissect(frame_data *fdata,
 129                 guint32 *cum_bytes);
 130
 131 /** @} */
 132
 133 #endif  /* __FRAME_DATA__ */