Term Project: ZRP Source Code Part 1

1. Term Project:ZRP Source CodePart 1 presented by Ikhsan Putra Kurniawan Sun Moon University Spring 2012 운영체제특론(Advanced Operating System)

2. Contents • routing_zrp.cpp: • libraries • routing methods 운영체제특론(Advanced Operating System)

3. Libraries • stdlib.h • stdio.h • string.h • “api.h” • “network_ip.h” • “routing_zrp.h” • “routing_iarp.h” • “routing_ierp.h” 운영체제특론(Advanced Operating System)

4. stdlib.h • Standard general utilities library • String conversion • Eg:atoi, convert string to int, etc, • dynamic memory management • Eg: malloc, memory allocation, etc, • Environment • Eg: exit, terminate process, etc, • Searching and sorting • Eg: qsort, sort elements of array, etc, • integer arithmethics • Eg: abs, absolute value, etc • Etc. 운영체제특론(Advanced Operating System)

5. stdio.h • Library to perform input/output operations • Operation on files • remove, remove file, etc • File access • Fclose, close file, etc. • Formatted i/o • printf, print data to stdout, etc. • Character i/o • getchar, get character from stdin, etc. • Etc. 운영체제특론(Advanced Operating System)

6. string.h • Several functions to manipulate C strings and arrays. • Copying • strcpy, copy string, etc. • Concatenation • strcat, concatenate strings, etc. • Comparison • strcmp, compare two strings, etc. • Etc. 운영체제특론(Advanced Operating System)

7. Libraries cont. • stdlib.h • stdio.h • string.h • “api.h” • “network_ip.h” • “routing_zrp.h” • “routing_iarp.h” • “routing_ierp.h” 운영체제특론(Advanced Operating System)

8. “api.h” • In qualnet • It enumerates the basic message/eventsexchanged during the simulation process and the various layer functions (initialize, finalize, and event handling functions) and other miscellaneous routines and data structure definitions. • Enum • MSG_SPECIAL_Timer = 0, • MSG_WEATHER_MobilityTimerExpired = 50, • MSG_PROP_SignalArrival = 100, • MSG_PROP_SAMPLE_PATHLOSS = 103, • Etc. • Routines • void CHANNEL_Initialize(Node *node, constNodeInput *nodeInput); • Channel initialization • void PHY_Init(Node *node, constNodeInput *nodeInput); • Physical layer initiation • Etc. 운영체제특론(Advanced Operating System)

9. network_ip.h • In qualnet • It contains data structures and prototypes of functions used by IP. • Define • #define IPVERSION4 4 • #define FORWARDING_TABLE_ROW_START_SIZE 8 • Etc. • Struct type • structIpHeaderType {……} • Etc. • Routines • static void IpHeaderSetVersion(UInt32 *ip_v_hl_tos_len, unsigned int version) • Etc. 운영체제특론(Advanced Operating System)

10. routing_zrp.h • In qualnet • Define • #define _ZRP_NETWORK_H_ • Struct • typedefstructstruct_zrp_strZrpData; • Etc. • Routines • Void ZrpInit(Node* node, ZrpData** dataPtr, constNodeInput* nodeInput, intinterfaceIndex); • Etc. • Enum • enum { ZRP_RECEIVE_PACKET_FROM_NETWORK, ZRP_ROUTE_PACKET, ZRP_IDLE_STATE, ZRP_INITIAL_STATE, ZRP_FINAL_STATE, ZRP_DEFAULT_STATE }; • Etc. • End define 운영체제특론(Advanced Operating System)

11. routing_iarp.h & routing_ierp.h • #define _IARP_NETWORK_H_ • Struct • Enum • routine • End define • #define _IERP_NETWORK_H_ • Struct • Enum • routine • End define 운영체제특론(Advanced Operating System)

12. routing_zrp.cpp and its methods • ZrpIsEnabled • ZrpReturnProtocolData • ZrpHandleProtocolPacket • ZrpRouterFunction • enterZrpIdleState • ZrpInitStats • ZrpPrintStats • ZrpRunTimeStat • ZrpInit • ZrpFinalize • ZrpProcessEvent 운영체제특론(Advanced Operating System)

13. ZrpIsEnabled • BOOLZrpIsEnabled(Node* node) { return (NetworkIpGetRoutingProtocol( node, ROUTING_PROTOCOL_ZRP) != NULL); } 운영체제특론(Advanced Operating System)

14. Returning pointer to protocol data structure. Parameters: node (node which is returning protocol data), routingProtocolType (the routing Protocol Type). • void* ZrpReturnProtocolData(Node* node,NetworkRoutingProtocolTyperoutingProtocolType) { ZrpData* dataPtr = (ZrpData*) NetworkIpGetRoutingProtocol (node, ROUTING_PROTOCOL_ZRP); if (dataPtr == NULL) { ERROR_Assert(FALSE, "ZRP not found in this node"); abort(); } switch (routingProtocolType) { case ROUTING_PROTOCOL_IERP: { return dataPtr->ierpProtocolStruct; } case ROUTING_PROTOCOL_IARP: { return dataPtr->iarpProtocolStruct; } default: { return NULL; } } • } 운영체제특론(Advanced Operating System)

15. void ZrpHandleProtocolPacket(Node* node,Message* msg, NodeAddresssourceAddr,NodeAddressdestAddr, intinterfaceIndex, unsigned ttl) { //UserCodeStartReceivePacketFromNetwork // NO operation. // Control of code MUST NOT come here. ZrpData *dataPtr = (ZrpData*) NetworkIpGetRoutingProtocol(node, ROUTING_PROTOCOL_ZRP); ERROR_Assert(FALSE, "Control Must not reach Here"); //UserCodeEndReceivePacketFromNetwork dataPtr->state = ZRP_IDLE_STATE; enterZrpIdleState(node, dataPtr, msg); • } 운영체제특론(Advanced Operating System)

16. void ZrpRouterFunction(Node* node, Message* msg, NodeAddressdestAddr, NodeAddresspreviousHopAddr, BOOL* packetWasRouted) { //UserCodeStartRoutePacket ZrpData*dataPtr = (ZrpData*) NetworkIpGetRoutingProtocol(node, ROUTING_PROTOCOL_ZRP); // call iarp router function first // if IARP is unable to route call IERP to route dataPtr->iarpRouterFunction( node, msg, destAddr, previousHopAddr, packetWasRouted); if (*packetWasRouted == FALSE) { // call ierp router function dataPtr->ierpRouterFunction( node, msg, destAddr, previousHopAddr, packetWasRouted); } // Set the message pointer to NULL. This will not effect // the original pointer passed to this function, but it will prevent // the message from being freed at the idle state. msg = NULL; //UserCodeEndRoutePacket dataPtr->state = ZRP_IDLE_STATE; enterZrpIdleState(node, dataPtr, msg); } 운영체제특론(Advanced Operating System)

17. enterZrpIdleState • static void enterZrpIdleState(Node* node, ZrpData* dataPtr, Message *msg) { //UserCodeStartIdleState // Free the message if it is null. if (msg != NULL) { MESSAGE_Free(node, msg); } //UserCodeEndIdleState • } 운영체제특론(Advanced Operating System)

18. ZrpInitStats, ZrpPrintStats, ZrpRunTimeStat • //Statistic Function Definitions static void ZrpInitStats(Node* node, ZrpStatsType *stats) { if (node->guiOption) { } } • void ZrpPrintStats(Node* node) { } • void ZrpRunTimeStat(Node* node, ZrpData* dataPtr) { } 운영체제특론(Advanced Operating System)

19. ZrpInit • void ZrpInit(Node* node, ZrpData** dataPtr, constNodeInput* nodeInput, intinterfaceIndex) { Message *msg = NULL; //UserCodeStartInit // The following line of code should be executed only // for the *first* initialization of an interface that // shares this data structure. // Initialize ZrpProtocol data structure (*dataPtr) = (ZrpData*) MEM_malloc(sizeof(ZrpData)); memset((*dataPtr), 0, sizeof(ZrpData)); (*dataPtr)->printStats = TRUE; // The routing protocols IARP and IERP will be Initialized // from ZRP. So first check that if IARP or IER is already // initialized or not. If they are initialized before flash // an error message and the abort execution. if (NetworkIpGetRoutingProtocol(node, ROUTING_PROTOCOL_IERP) || NetworkIpGetRoutingProtocol(node, ROUTING_PROTOCOL_IARP)) { ERROR_ReportError("IERP or IARP was initialized before \n" "disable IARP or IERP first\n"); abort(); } // Register ZRP with IARP protocol IarpRegisterZrp( node, (IarpData**) &((*dataPtr)->iarpProtocolStruct), nodeInput, interfaceIndex, &((*dataPtr)->iarpRouterFunction)); 운영체제특론(Advanced Operating System)

20. // Register ZRP with IERP protocol IerpRegisterZrp( node, (IerpData**) &((*dataPtr)->ierpProtocolStruct), nodeInput, interfaceIndex, &((*dataPtr)->ierpRouterFunction), &((*dataPtr)->macStatusHandlar)); NetworkIpSetRouterFunction( node, ZrpRouterFunction, interfaceIndex); NetworkIpSetMacLayerStatusEventHandlerFunction( node, (*dataPtr)->macStatusHandlar, interfaceIndex); IarpSetIerpUpdeteFuncPtr(node, IerpReturnRouteTableUpdateFunction(node)); if ((*dataPtr)->initStats) { ZrpInitStats(node, &((*dataPtr)->stats)); } //UserCodeEndInit if ((*dataPtr)->initStats) { ZrpInitStats(node, &((*dataPtr)->stats)); } (*dataPtr)->state = ZRP_IDLE_STATE; enterZrpIdleState(node, *dataPtr, msg); } 운영체제특론(Advanced Operating System)

21. ZrpFinalize • void ZrpFinalize(Node* node) { ZrpData *dataPtr = (ZrpData*) NetworkIpGetRoutingProtocol(node, ROUTING_PROTOCOL_ZRP); //UserCodeStartFinalize IarpFinalize(node); IerpFinalize(node); //UserCodeEndFinalize if (dataPtr->statsPrinted) { return; } if (dataPtr->printStats) { dataPtr->statsPrinted = TRUE; ZrpPrintStats(node); } } 운영체제특론(Advanced Operating System)

22. ZrpProcessEvent • void ZrpProcessEvent(Node* node, Message* msg) { ZrpData* dataPtr = (ZrpData*) NetworkIpGetRoutingProtocol(node, ROUTING_PROTOCOL_ZRP); switch (dataPtr->state) { case ZRP_IDLE_STATE: assert(FALSE); break; default: ERROR_ReportError("Illegal transition"); break; } } 운영체제특론(Advanced Operating System)

23. Next: Part 2 • IERP. • IARP. • Improvement. 운영체제특론(Advanced Operating System)