Notes

#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netinet/ip.h>
#include<arpa/inet.h>
#include<string.h>
#include<ctype.h>

int find_gcd(int a, int b)
{
if (a == 0)
return b;
return find_gcd(b % a, a);
}

int main(){
int sockfd,len,line;
char buff[50];
char *res_msg;
int num[2];
struct sockaddr_in addrport,src_addr,dest_addr;
sockfd = socket(AF_INET,SOCK_DGRAM,0);
if(sockfd == -1){
printf("Socket creation failed!!n");
exit(0);
}
else{
printf("Socket Created!!n");
}
addrport.sin_family=AF_INET;
addrport.sin_port=htons(4040);
addrport.sin_addr.s_addr=inet_addr("127.0.0.1");
len = sizeof(src_addr);
line = 50;
if(bind(sockfd,(struct sockaddr *)&addrport,sizeof(addrport))!=-1){
printf("Bind Complete.n");
int res_1 = recvfrom(sockfd,&num,line,0,(struct sockaddr*)&src_addr,&len);
//int res_2 = recvfrom(sockfd,num2,line,0,(struct sockaddr*)&src_addr,&len);
if(res_1 == -1){
printf("Receive Error!n");
}
else{
//buff[r]='';
printf("The two numbers Received from the client are %d and %dn",num[0],num[1]);
}
dest_addr.sin_family=AF_INET;
dest_addr.sin_port=htons(5100);
dest_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
int ans = find_gcd(num[0],num[1]);
int s = sendto(sockfd,&ans,sizeof(ans),0,(struct sockaddr*)&dest_addr,sizeof(dest_addr));
if(s==-1){
printf("Error in sending the message!n");
exit(0);
}
else{
printf("Response message sent successfully!n");
printf("The GCD of the two numbers is :- %dn",ans);
}
}
else{
printf("Bind Incomplete!n");
}
return 0;
}



#include<stdio.h>
#include<stdlib.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<netinet/ip.h>
#include<arpa/inet.h>
#include<string.h>


int main(){
int sockfd;
char str[50],buff[50];
int num[2],ans = 0;
struct sockaddr_in addrport,dest_addr,src_addr;
sockfd = socket(AF_INET,SOCK_DGRAM,0);
if(sockfd == -1){
printf("Client Socket creation failed!!n");
exit(0);
}
else{
printf("Client Socket Created!!n");
}
addrport.sin_family=AF_INET;
addrport.sin_port=htons(5100);
addrport.sin_addr.s_addr=inet_addr("127.0.0.1");
if(bind(sockfd,(struct sockaddr *)&addrport,sizeof(addrport))!=-1){
printf("Client Bind completed!n");
printf("Enter the two numbers :- ");
scanf("%d%d",&num[0],&num[1]);
dest_addr.sin_family=AF_INET;
dest_addr.sin_port=htons(4040);
dest_addr.sin_addr.s_addr=inet_addr("127.0.0.1");
int s1 = sendto(sockfd,&num,sizeof(num),0,(struct sockaddr*)&dest_addr,sizeof(dest_addr));
//int s2 = sendto(sockfd,num2,sizeof(num2),0,(struct sockaddr*)&dest_addr,sizeof(dest_addr));
if(s1 ==-1){
printf("Error in sending the message!n");
exit(0);
}
else{
printf("Client message sent successfully!n");
}
int len = sizeof(src_addr);
int line = 50;
int r = recvfrom(sockfd,&ans,line,0,(struct sockaddr*)&src_addr,&len);
if(r == -1){
printf("Receive Error!");
}
else{
printf("Message Received from server :- n%dn",ans);
}
}
else{
printf("Bind Incomplete!n");
}
return 0;
}