udp client server [network lab]

udp client server 

UDP single server  

 #include<stdio.h>

#include<unistd.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<string.h>

#include<sys/socket.h>

int main()

{

        int sd,nsd,i=0,port=7052;

        unsigned int t;

        char content[30];

        struct sockaddr_in ser,cli;

       if((sd=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP))==-1)

        {

                printf("Error:Socket creation in server\n");

                return 0;

        }

        bzero((char *)&ser,sizeof(ser));

        printf("The port address is %d\n",port);

        ser.sin_family=AF_INET;

        ser.sin_port=htons(port);

        ser.sin_addr.s_addr=inet_addr("192.168.0.200");

        if(bind(sd,(struct sockaddr *)&ser,sizeof(ser))==-1)

        {

             printf("Error : Binding problem port busy");

             return (0);

        }

        printf("\t\tServer\n");

        t=sizeof(cli);

        printf("\n client accepted\n");

 while(1)

        {

                recvfrom(sd,content,50,0,(struct sockaddr*)&cli,&t);

                puts(content);

                if(content[i]=='*')

                        break;

        }

printf("\n");

        close(sd);

        return 0;

}

Server o/p:

[cs2910007@localhost netlab]$ ./a.out

The port address is 7052

                                                Server

 client accepted

5

9

6

9

*

[cs2910007@localhost netlab]$

UDP Client single

#include<unistd.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<string.h>

#include<sys/socket.h>

int main()

{

        int sd,i=0,port=7052;

        char cont[30]="\0";

        struct sockaddr_in ser;

        if((sd=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP))==-1)

        {

                printf("Error:Socket creation in server\n");

                return 0;

        }

        bzero((char *)&ser,sizeof(ser));

        printf("The port address is %d\n",port);

        ser.sin_family=AF_INET;

        ser.sin_port=htons(port);

        ser.sin_addr.s_addr=inet_addr("192.168.0.200");

        if(connect(sd,(struct sockaddr *)&ser,sizeof(ser))==-1)

        {

             printf("Error in connecting port busy");

             return 0;

        }

        printf("This is client");

        printf("Enter any data :\n");

        while(1)

        {

                gets(cont);

                sendto(sd,cont,50,0,(struct sockaddr*)&ser,sizeof(ser));

                  if(cont[i]=='*')

                        break;

                }

        close(sd);

        return 0;

 }

Client o/p:

[cs2910007@localhost netlab]$ ./a.out

The port address is 7052

This is clientEnter any data :

5

9

9

*

[cs2910007@localhost netlab]$