Custom Routing:

Implementing custom routing protocols in NS$-3$ requires modifying existing protocols or creating new ones from scratch. This involves modifying routing messages, decision$-$making algorithms, and table updates Could you writ ethe code of it dont understands

Steps:

Identify your specific simulation goals and requirements. What are you trying to compare or analyze?analyze packet delivery ratio, end to end delay, routing overhead,throughput. Could you write the code of it $?$

Choose appropriate mobility models for different types of vehicles.

Decide on the level of customization for AODV and OLSR routing. Do you need minor adjustments or completely new protocols? need hybrid vanet routing protocols for AODV andf OLSR

Start with existing code examples and tutorials, then modify them based on your needs.

Test and validate your simulation setup and custom code.

Remember, developing a complex simulation like this requires a good understanding of NS$-3,$ network protocols, and VANETs. If you find the task challenging, consider seeking help from the NS$-3$ community or collaborating with someone experienced in network simulation. Custom AODV RouteRequest$()$:

AODV Route Request, Reply, Error:

AODVRouteRequest:

Create a RouteRequest packet with source and destination addresses.

Broadcast the packet to neighboring nodes.

AODVRouteReply:

Nodes receiving RouteRequest check their routing tables for a path to the destination.

If a path exists, send a RouteReply back to the source.

AODVRouteError:

If a node cannot find a route to the destination, send a RouteError back to the source.

Custom Routing for AODV and OLSR:

Custom AODV:

Modify the AODV routing algorithm behavior based on your specific needs, like prioritizing certain routes or incorporating additional metrics.

Override existing AODV functions like RouteRequest or RouteReply to implement your custom logic.

Custom OLSR:

Modify the OLSR multipoint relay algorithm to adapt to specific network conditions or incorporate additional information like zone boundaries.

Override existing OLSR functions like MPR selection or HELLO message generation. need you to show me in this code for better understanding it make non sense. Ptr mobility $=$ CreateObject$()$;

mobility$->$SetHighwaySpeed$(80)$; $//$ Set speed limit

mobility$->$SetLaneNumber$(3)$; $//$ Set number of lanes

Ptr node $=$ CreateObject$()$;

node$->$SetMobilityModel$($mobility$)$;

Zone$-$Based Switching:

bool isAODVZone$($Ptr node$)\{$

$//$ Check if node is within an AODV zone $($e$.$g$.,$ based on location$)$

$//...$

$\}$

if $($isAODVZone$($node$))\{$

$//$ Use AODV routing

$\}$ else $\{$

$//$ Use OLSR routing

$\}$ write me the code dont undersand it truct RouteEntry $\{$

Ipv$4$Address dest;

Ipv$4$Address nextHop;

RoutingProtocol protocol; $//$ AODV or OLSR

$//...$ other information

$\}$;

std::vector routingTable;

AODV RouteRequest:

Ptr packet $=$ Create$()$;

packet$->$SetSource$($Ipv$4$Address$($sourceAddress$))$;

packet$->$SetDestination$($Ipv$4$Address$($destAddress$))$;

node$->$Send$($packet$)$;

Custom AODV RouteReply:

Ptr reply $=$ Create$()$;

reply$->$SetRoute$($route$)$; $//$ Modified route based on your custom logic

node$->$Send$($reply$)$; complete the write whole code dont seperate it parts and parts. $$t makes difficult