having trouble with a UDP c program where I need to make a knock knock joke where the client initiates the conversation with the conversation being:

Client $>$ Server: Knock! Knock!

Server $>$ Client: Who is there?

Client $>$ Server: Robin.

Server $>$ Client: Robin who?

Client $>$ Server: Robin you! Hand over your cash!

the files i need to complete are udpknockknockjokeclient.c and udpknockknockjokeserver.c$.$ I should also note that the program needs to be manually terminated and not automatically after program is completed.

they need to be utilized with the files:

AddressUtility.c

#include

#include

#include

#include

void PrintSocketAddress$($const struct sockaddr $*$address$,$ FILE $*$stream$)\{$

$//$ Test for address and stream

if $($address $==$ NULL $||$ stream $==$ NULL$)$

return;

void $*$numericAddress; $//$ Pointer to binary address

$//$ Buffer to contain result $($IPv$6$ sufficient to hold IPv$4)$

char addrBuffer$[$INET$6\_$ADDRSTRLEN$]$;

in$\_$port$\_$t port; $//$ Port to print

$//$ Set pointer to address based on address family

switch $($address$->$sa$\_$family$)\{$

case AF$\_$INET:

numericAddress $=$ &$(($struct sockaddr$\_$in $*)$ address$)->$sin$\_$addr;

port $=$ ntohs$((($struct sockaddr$\_$in $*)$ address$)->$sin$\_$port$)$;

break;

case AF$\_$INET$6$:

numericAddress $=$ &$(($struct sockaddr$\_$in$6*)$ address$)->$sin$6\_$addr;

port $=$ ntohs$((($struct sockaddr$\_$in$6*)$ address$)->$sin$6\_$port$)$;

break;

default:

fputs$("[$unknown type$]",$ stream$)$; $//$ Unhandled type

return;

$\}$

$//$ Convert binary to printable address

if $($inet$\_$ntop$($address$->$sa$\_$family, numericAddress, addrBuffer,

sizeof$($addrBuffer$))==$ NULL$)$

fputs$("[$invalid address$]",$ stream$)$; $//$ Unable to convert

else $\{$

fprintf$($stream$,"\%$s$",$ addrBuffer$)$;

if $($port $!=0)//$ Zero not valid in any socket addr

fprintf$($stream$,"-\%$u$",$ port$)$;

$\}$

$\}$

bool SockAddrsEqual$($const struct sockaddr $*$addr$1,$ const struct sockaddr $*$addr$2)\{$

if $($addr$1==$ NULL $||$ addr$2==$ NULL$)$

return addr$1==$ addr$2$;

else if $($addr$1->$sa$\_$family $!=$ addr$2->$sa$\_$family$)$

return false;

else if $($addr$1->$sa$\_$family $==$ AF$\_$INET$)\{$

struct sockaddr$\_$in $*$ipv$4$Addr$1=($struct sockaddr$\_$in $*)$ addr$1$;

struct sockaddr$\_$in $*$ipv$4$Addr$2=($struct sockaddr$\_$in $*)$ addr$2$;

return ipv$4$Addr$1->$sin$\_$addr.s$\_$addr $==$ ipv$4$Addr$2->$sin$\_$addr.s$\_$addr

&& ipv$4$Addr$1->$sin$\_$port $==$ ipv$4$Addr$2->$sin$\_$port;

$\}$ else if $($addr$1->$sa$\_$family $==$ AF$\_$INET$6)\{$

struct sockaddr$\_$in$6*$ipv$6$Addr$1=($struct sockaddr$\_$in$6*)$ addr$1$;

struct sockaddr$\_$in$6*$ipv$6$Addr$2=($struct sockaddr$\_$in$6*)$ addr$2$;

return memcmp$($&ipv$6$Addr$1->$sin$6\_$addr, &ipv$6$Addr$2->$sin$6\_$addr,

sizeof$($struct in$6\_$addr$))==0$ && ipv$6$Addr$1->$sin$6\_$port

$==$ ipv$6$Addr$2->$sin$6\_$port;

$\}$ else

return false;

$\}$

DieWithMessage.c

#include

#include

void DieWithUserMessage$($const char $*$msg$,$ const char $*$detail$)\{$

fputs$($msg$,$ stderr$)$;

fputs$("$: $",$ stderr$)$;

fputs$($detail$,$ stderr$)$;

fputc$(\text{'}$

$\text{'},$ stderr$)$;

exit$(1)$;

$\}$

void DieWithSystemMessage$($const char $*$msg$)\{$

perror$($msg$)$;

exit$(1)$;

$\}$

Practical.h

#ifndef PRACTICAL$\_$H$\_$

#define PRACTICAL$\_$H$\_$

#include

#include

#include

$//$ Handle error with user msg

void DieWithUserMessage$($const char $*$msg$,$ const char $*$detail$)$;

$//$ Handle error with sys msg

void DieWithSystemMessage$($const char $*$msg$)$;

$//$ Print socket address

void PrintSocketAddress$($const struct sockaddr $*$address$,$ FILE $*$stream$)$;

$//$ Test socket address equality

bool SockAddrsEqual$($const struct sockaddr $*$addr$1,$ const struct sockaddr $*$addr$2)$;

$//$ Create, bind, and listen a new TCP server socket

int SetupTCPServerSocket$($const char $*$service$)$;

$//$ Accept a new TCP connection on a server socket

int AcceptTCPConnection$($int servSock$)$;

$//$ Handle new TCP client

void HandleTCPClient$($int clntSocket$)$;

$//$ Create and connect a new TCP client socket

int SetupTCPClientSocket$($const char $*$server$,$ const char $*$service$)$;

enum sizeConstants $\{$

MAXSTRINGLENGTH $=128,$

BUFSIZE $=512,$

$\}$;

#endif $//$ PRACTICAL$\_$H$\_$