270 lines
6.3 KiB
C
270 lines
6.3 KiB
C
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//=============================================================================
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// Copyright (c) 1997 Microsoft Corporation
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// File Name: global.h
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//
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// Abstract:
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// This file contains declarations for the global variables
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// and some global #defines.
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//
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// Author: K.S.Lokesh (lokeshs@) 11-1-97
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//
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//=============================================================================
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#ifndef _IGMP_H_
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#define _IGMP_H_
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//------------------------------------------------------------------------------
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// SOME GLOBAL #DEFINES
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//------------------------------------------------------------------------------
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// log warning every 60 min if ver-1 router present when my router is ver-2
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#define OTHER_VER_ROUTER_WARN_INTERVAL 60
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//
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// the router remains in ver-1 for 400secs after hearing from a ver-1 router
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//
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#define IGMP_VER1_RTR_PRESENT_TIMEOUT 40000L
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//
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// the default size set for local mib enumeration.
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//
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#define MIB_DEFAULT_BUFFER_SIZE 500
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//
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// for the first 5 sockets, I bind them to different event objects
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//
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#define NUM_SINGLE_SOCKET_EVENTS 5
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//
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// at most 30 sockets will be bound to the same event.
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//
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#define MAX_SOCKETS_PER_EVENT 30
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//
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// various codes describing states of igmp
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//
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typedef enum _IGMP_STATUS_CODE {
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IGMP_STATUS_STARTING = 100,
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IGMP_STATUS_RUNNING = 101,
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IGMP_STATUS_STOPPING = 102,
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IGMP_STATUS_STOPPED = 103
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} IGMP_STATUS_CODE, *PIGMP_STATUS_CODE;
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//------------------------------------------------------------------------------
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//
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// struct: IGMP_GLOBAL
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//
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// The critical section IGMP_GLOBAL::CS protects the fields Status,
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// ActivityCount and ActivitySemaphore.
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// Changes: if any new fields are added, make sure that StartProtocol() takes
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// appropriate action of its value being reset if StartProtocol() is called
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// immediately after StopProtocol().
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// Locks for ProxyIfEntry: take the lock on the interface, and then check
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// again if the g_pProxyIfEntry value has been changed.
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//
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// Note: if any new field is added, you might have to reset it in StartProtocol
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//------------------------------------------------------------------------------
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// used during cleanup to see what all structures need to be deleted
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extern DWORD g_Initialized;
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//
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// Interface table: IF_HASHTABLE_SZ set in table.h to 256
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// Contains the hash table, lists, etc.
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//
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extern PIGMP_IF_TABLE g_pIfTable;
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// group table: GROUP_HASH_TABLE_SZ set in table.h to 256
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extern PGROUP_TABLE g_pGroupTable;
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// defined in table.h. contains LoggingLevel and RasClientStats
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extern GLOBAL_CONFIG g_Config;
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// defined in table.h. contains Current-Added GroupMemberships
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extern IGMP_GLOBAL_STATS g_Info;
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//
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// list of sockets (1st 4 interfaces will be bound to different sockets).
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// After that, a socket will be created for every 30 interfaces
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// Most of the operations take read lock (input packet).
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//
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extern LIST_ENTRY g_ListOfSocketEvents;
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extern READ_WRITE_LOCK g_SocketsRWLock;
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// enum lock
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extern READ_WRITE_LOCK g_EnumRWLock;
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// Igmp global timer. defined in igmptimer.h
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extern IGMP_TIMER_GLOBAL g_TimerStruct;
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//
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// MGMhandle for igmp router and proxy.
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//
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extern HANDLE g_MgmIgmprtrHandle;
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extern HANDLE g_MgmProxyHandle;
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extern CRITICAL_SECTION g_ProxyAlertCS;
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extern LIST_ENTRY g_ProxyAlertsList;
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//------------------------------------------------------------------------------
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// proxy interface.
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//
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// For accessing proxy Interface,
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// 1. tmpVar = g_ProxyIfIndex.
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// 2. Read/WriteLockInterface(tmpVar).
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// 3. check(tmpVar==g_ProxyIfIndex). If FALSE, UnlockInterface using tmpVar
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// as index, and goto 1 and try again.
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// 4. if TRUE, g_ProxyIfEntry is valid for use. Release IF lock when done.
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//
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// While deleting, the interface is write locked and g_ProxyIfIndex is
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// changed using interlocked operation
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//
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// most of the operations for the proxy interface involve creating/deleting
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// group entries and (un)binding the Mcast group from the socket. The
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// processing being less, I dont create dynamic lock for each bucket,
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// also no point creating a ProxyHT_CS. I just take a write lock for the
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// interface. Change this if required. However dynamic locking would require
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// additional 3 lockings in addition to interface locking.
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//------------------------------------------------------------------------------
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extern DWORD g_ProxyIfIndex;
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extern PIF_TABLE_ENTRY g_pProxyIfEntry;
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#define PROXY_HASH_TABLE_SZ 128
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//
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// ras interface
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//
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extern DWORD g_RasIfIndex;
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extern PIF_TABLE_ENTRY g_pRasIfEntry;
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//
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// global lock:
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// protects g_ActivitySemaphore, g_ActivityCount, g_RunningStatus
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//
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extern CRITICAL_SECTION g_CS;
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//
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// contains list of free dynamic CS locks and the MainLock
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//
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extern DYNAMIC_LOCKS_STORE g_DynamicCSStore;
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extern DYNAMIC_LOCKS_STORE g_DynamicRWLStore;
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//
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// used to know how many active threads are running
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// protected by g_CS
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//
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extern HANDLE g_ActivitySemaphore;
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extern LONG g_ActivityCount;
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extern DWORD g_RunningStatus;
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extern HINSTANCE g_DllHandle;
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// rtm event and queue
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extern HANDLE g_RtmNotifyEvent;
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extern LOCKED_LIST g_RtmQueue;
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extern HANDLE g_Heap;
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extern DWORD g_TraceId;
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extern HANDLE g_LogHandle;
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// global variable used to assign unique ids for mib enumeration
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extern USHORT g_GlobalIfGroupEnumSignature;
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#ifdef MIB_DEBUG
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extern DWORD g_MibTraceId;
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extern IGMP_TIMER_ENTRY g_MibTimer;
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#endif
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// IGMP_GLOBAL
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//------------------------------------------------------------------------------
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// type definitions for event message queue
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//------------------------------------------------------------------------------
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typedef struct _EVENT_QUEUE_ENTRY {
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ROUTING_PROTOCOL_EVENTS EventType;
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MESSAGE Msg;
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LIST_ENTRY Link;
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} EVENT_QUEUE_ENTRY, *PEVENT_QUEUE_ENTRY;
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DWORD
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EnqueueEvent(
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PLOCKED_LIST pQueue,
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ROUTING_PROTOCOL_EVENTS EventType,
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MESSAGE Msg
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);
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DWORD
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DequeueEvent(
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PLOCKED_LIST pQueue,
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ROUTING_PROTOCOL_EVENTS *pEventType,
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PMESSAGE pResult
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);
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#endif // #ifndef _IGMP_H_
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