amit12sept

hi i have a problem.........

i want to send a structure b/w two systems using sockets.............

but systems are not connected by lan and no server......

instead i have wlan connection they are able to ping each other and also i m able to use scp..........

but for socket (stream tcp/ip) it is not working its showing

message no route to host.........


i m sending my code............

where 192.168.1.120 is my ip address.





/*This is a simple sequential server program which receives message at port 1034 ans sends the message to desired client*/



#include<stdio.h>

#include<stdlib.h>

#include<sys/types.h>

#include<sys/socket.h>

#include<netinet/in.h>

#include<arpa/inet.h>



#define MYPORT 1034





main()

{

int sd,pid,nsd,dat,yes=1;

char message[40];

struct sockaddr_in server,client;

socklen_t length;



//Creating un named socket

if((sd=socket(PF_INET,SOCK_STREAM,0))==-1) {

perror("socket");

exit(1);

}

server.sin_port=htons(MYPORT);

server.sin_family=PF_INET;

server.sin_addr.s_addr=inet_addr("192.168.1.120");



//Nameing the scoket using bind(2) which also binds the scoket to LOCAL ADDRESS



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

perror("bind:");

exit(1);

}

//Listen for connections on scoket



if(listen(sd,5)==-1) { //backlog is 5 pending connections can grow

perror("listen");

exit(1);

}

printf("Waiting for connection.............\n");



//Accept connection on socket, then return new socket descriptor



if((nsd=accept(sd,(struct sockaddr *)&client,&length))==-1) {

perror("accept");

exit(1);

}

//Manipualte inter net address, converter.

//INTERNET to network - byte - order

printf("Got connection from client:%s\n",inet_ntoa(client.sin_addr));



//Recive message from the socket

if((dat=recv(nsd,message,40,0))==-1) {

perror("recv");

exit(1);

}



message[dat]='\0';



printf("Data received is : %s\n",message);

printf("Enter the data you want to send to client\n");

fgets(message,40,stdin); //Reading from stdin



//Write message to socket

send(nsd,message,40,0);



close(sd);

close(nsd);



}//End of the program




/* This is a simple tcpclient which connects to the server and sends a message*/

#include<sys/socket.h>

#include<stdlib.h>

#include<sys/types.h>

#include<netinet/in.h>

#include<arpa/inet.h>

#include<stdio.h>



#define PORT 1034



struct sockaddr_in server;

main()

{

int n,sd,length;

char msg[40];

if((sd=socket(PF_INET,SOCK_STREAM,0))==-1) {

perror("socket");

exit(1);

}



server.sin_family=PF_INET;

server.sin_port=htons(PORT);

server.sin_addr.s_addr=inet_addr("192.168.1.120");



//initiate the connection on socket

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

perror("In client connect \n");

exit(1);

}



printf("Enter the message you want to send to server\n");

fgets(msg,40,stdin);//Read message from stdin

send(sd,msg,40,0); //send message to server

printf("Waiting for message from server..............\n");

//bolcked recive

n=recv(sd,msg,40,0);//Receving message from server

msg[n]='\0';



printf("Message received from server is:%s\n",msg);

close(sd);

}