lttv/lttv/sync/data_structures.h

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2009 Benjamin Poirier <benjamin.poirier@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation;
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  16  * MA 02111-1307, USA.
  17  */
  18
  19 #ifndef DATA_STRUCTURES_H
  20 #define DATA_STRUCTURES_H
  21
  22 #include <glib.h>
  23 #include <stdbool.h>
  24 #include <stdint.h>
  25
  26
  27 enum Direction
  28 {
  29         OUT,
  30         IN,
  31 };
  32
  33 enum EventType
  34 {
  35         TCP,
  36         UDP,
  37         TYPE_COUNT // This must be the last field
  38 };
  39
  40 // Stage 1 to 2: These structures are passed from processing to matching modules
  41 // TCP events
  42 typedef struct
  43 {
  44         uint32_t saddr, daddr;
  45         uint16_t source, dest;
  46 } ConnectionKey;
  47
  48 typedef struct
  49 {
  50         ConnectionKey connectionKey;
  51         uint8_t ihl;
  52         uint16_t tot_len;
  53         uint32_t seq, ack_seq;
  54         uint8_t doff;
  55         uint8_t ack, rst, syn, fin;
  56 } SegmentKey;
  57
  58 typedef struct
  59 {
  60         enum Direction direction;
  61         SegmentKey* segmentKey;
  62 } TCPEvent;
  63
  64 // UDP events
  65 typedef struct
  66 {
  67         uint32_t saddr, daddr;
  68         uint16_t source, dest;
  69         uint16_t ulen;
  70         uint8_t dataKey[8];
  71 } DatagramKey;
  72
  73 typedef struct
  74 {
  75         enum Direction direction;
  76         DatagramKey* datagramKey;
  77         bool unicast;
  78 } UDPEvent;
  79
  80 typedef struct
  81 {
  82         uint32_t seconds;
  83         uint32_t nanosec;
  84 } WallTime;
  85
  86 typedef struct _Event
  87 {
  88         unsigned long traceNum;
  89         // wallTime is corrected according to factors in trace struct, cpuTime
  90         // is not
  91         uint64_t cpuTime;
  92         WallTime wallTime;
  93
  94         // specific event structures and functions could be in separate files and
  95         // type could be an int
  96         enum EventType type;
  97         // event could be a void*, this union is to avoid having to cast
  98         union {
  99                 TCPEvent* tcpEvent;
 100                 UDPEvent* udpEvent;
 101         } event;
 102
 103         void (*copy)(const struct _Event* const event, struct _Event** const newEvent);
 104         void (*destroy)(struct _Event* const event);
 105 } Event;
 106
 107 // Stage 2 to 3: These structures are passed from matching to analysis modules
 108 typedef struct _Message
 109 {
 110         Event* inE, * outE;
 111
 112         void (*print)(const struct _Message* const message);
 113 } Message;
 114
 115 typedef struct
 116 {
 117         Message* message;
 118         // Event* acks[]
 119         GQueue* acks;
 120 } Exchange;
 121
 122 typedef struct
 123 {
 124         // Event* events[]
 125         GQueue* events;
 126 } Broadcast;
 127
 128 // One set of factors for each trace, this is the result of synchronization
 129 typedef struct
 130 {
 131         double drift, offset;
 132 } Factors;
 133
 134
 135 // ConnectionKey-related functions
 136 guint ghfConnectionKeyHash(gconstpointer key);
 137
 138 gboolean gefConnectionKeyEqual(gconstpointer a, gconstpointer b);
 139 bool connectionKeyEqual(const ConnectionKey* const a, const ConnectionKey*
 140         const b);
 141
 142 void gdnConnectionKeyDestroy(gpointer data);
 143
 144 // SegmentKey-related functions
 145 guint ghfSegmentKeyHash(gconstpointer key);
 146 gboolean gefSegmentKeyEqual(gconstpointer a, gconstpointer b);
 147
 148 // DatagramKey-related functions
 149 guint ghfDatagramKeyHash(gconstpointer key);
 150 gboolean gefDatagramKeyEqual(gconstpointer a, gconstpointer b);
 151 void gdnDestroyDatagramKey(gpointer data);
 152
 153 // Event-related functions
 154 void gdnDestroyEvent(gpointer data);
 155 void copyEvent(const Event* const event, Event** const newEvent);
 156 void copyTCPEvent(const Event* const event, Event** const newEvent);
 157 void copyUDPEvent(const Event* const event, Event** const newEvent);
 158 void destroyEvent(Event* const event);
 159 void destroyTCPEvent(Event* const event);
 160 void destroyUDPEvent(Event* const event);
 161 void gfDestroyEvent(gpointer data, gpointer user_data);
 162 double wallTimeSub(const WallTime const* tA, const WallTime const* tB);
 163
 164 // Message-related functions
 165 void printTCPSegment(const Message* const segment);
 166 void convertIP(char* const str, const uint32_t addr);
 167
 168 gint gcfTCPSegmentAckCompare(gconstpointer a, gconstpointer b);
 169 bool isAcking(const Message* const ackSegment, const Message* const ackedSegment);
 170
 171 void gdnTCPSegmentListDestroy(gpointer data);
 172 void gfTCPSegmentDestroy(gpointer data, gpointer user_data);
 173 void destroyTCPSegment(Message* const segment);
 174
 175 // Exchange-related functions
 176 void destroyTCPExchange(Exchange* const exchange);
 177
 178 // Broadcast-related functions
 179 void gdnDestroyBroadcast(gpointer data);
 180 void destroyBroadcast(Broadcast* const broadcast);
 181
 182 #endif