i have two computers connected onto a network here at work. I want to run my server.c on one computer and get a response from client.c. This works fine with localhost and using two terminal screens.........one for the server and other for the client. But it does not work if i run the server program on another computer. How can i fix this.....what are the steps involved in doing this. Here are my programs(very simple).
/*server.c*/
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
int port = 8000;
void main(int argc,char *argv[])
{
struct sockaddr_in pin;
struct sockaddr_in sin;
int sock_descriptor;
int temp_sock_descriptor;
int address_size;
char buf[16384];
int i, len;
sock_descriptor = socket(AF_INET,SOCK_STREAM,0);
if(sock_descriptor == -1){
perror("call to socket");
//exit(1);
}
//char *str = "A default test string";
bzero(&sin,sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons(port);
if(bind(sock_descriptor,(struct sockaddr *)&sin, sizeof(sin)) == -1){
perror("call to bind\n");
//exit(1);
}
if(listen(sock_descriptor,20) == -1){
perror("call to listen\n");
//exit(1);
}
printf("Accepting connections.....\n");
while(1){
temp_sock_descriptor =
accept(sock_descriptor, (struct sockaddr*)&pin,
&address_size);
if(temp_sock_descriptor == -1){
perror("call to accept");
//exit(1);
}
if(recv(temp_sock_descriptor,buf,16384,0) == -1){
perror("call to recv");
//exit(1);
}
printf("Received from client:%s\n",buf);
len = strlen(buf);
for(i = 0;i < len;i++) buf[i] = toupper(buf[i]);
if(send(temp_sock_descriptor, buf, len, 0) == -1){
perror("call to send");
exit(1);
}
close(temp_sock_descriptor);
}
}
/*client.c*/
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
char* host_name = "xxx.16.13.124";
int port = 8000;
int main(int argc,char *argv[])
{
char buf[8192];
char message[256];
int socket_descriptor;
struct sockaddr_in pin;
struct hostent *server_host_name;
char *str = "A default test string";
if(argc < 2){
printf("Usage:'test \"Any test string\"\n");
printf("We will send a default test string.\n");
}
else{
str = argv[1];
}
if((server_host_name = gethostbyname(host_name)) == 0){
perror("Error resolving local host\n");
}
bzero(&pin,sizeof(pin));
pin.sin_family = AF_INET;
pin.sin_addr.s_addr = htonl(INADDR_ANY);
pin.sin_addr.s_addr = ((struct in_addr *)(server_host_name->h_addr))->s_addr;
pin.sin_port = htons(port);
if((socket_descriptor = socket(AF_INET, SOCK_STREAM,0)) == -1){
perror("Error opening socket\n");
exit(1);
}
if(connect(socket_descriptor,(void*)&pin, sizeof(pin)) == -1){
perror("Error connecting to socket\n");
exit(1);
}
printf("Sending message %s to server.....\n",str);
if(send(socket_descriptor,str,strlen(str),0) == -1){
perror("Error in Send\n");
exit(1);
}
printf("...sent message..wait for response..\n");
if(recv(socket_descriptor,buf,8192,0) == -1){
perror("Error in receiving response from server\n");
exit(1);
}
printf("\nResponse from server:\n\n%s\n",buf);
close(socket_descriptor);
exit(0);
}
