Daviddoria at 17:53, 23 November 2010

2010-11-23T17:53:04Z

Daviddoria: Created page with 'First run server 51717 Then run (while 'server' is still running): client localhost 51717 The client will ask you to type a message. Do this, and press enter. You will see th…'

2010-11-23T17:51:35Z

Created page with 'First run server 51717 Then run (while 'server' is still running): client localhost 51717 The client will ask you to type a message. Do this, and press enter. You will see th…'

New page

First run
server 51717

Then run (while 'server' is still running):
client localhost 51717

The client will ask you to type a message. Do this, and press enter. You will see the message appear in the server window!

==client.cpp==
<source lang="cpp">
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <cstdlib>
#include <cstring> // includes bzero
#include <fstream>
#include <iostream>

int main(int argc, char *argv[])
{
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;

char buffer[256];
if (argc < 3)
{
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
std::cout << "ERROR opening socket" << std::endl;
exit(-1);
}
server = gethostbyname(argv[1]);
if (server == NULL) {
fprintf(stderr,"ERROR, no such host\n");
exit(0);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,
(char *)&serv_addr.sin_addr.s_addr,
server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(sockaddr*)(&serv_addr),sizeof(serv_addr)) < 0)
{
std::cout << "ERROR connecting" << std::endl;
exit(-1);
}
printf("Please enter the message: ");
bzero(buffer,256);
fgets(buffer,255,stdin);
n = write(sockfd,buffer,strlen(buffer));
if (n < 0)
{
std::cout << "ERROR writing to socket" << std::endl;
exit(-1);
}
bzero(buffer,256);
n = read(sockfd,buffer,255);
if (n < 0)
{
std::cout << "ERROR reading from socket" << std::endl;
}
printf("%s\n",buffer);
return 0;
}

</source>

==server.cpp==
<source lang="cpp">
/* A simple server in the internet domain using TCP
The port number is passed as an argument */
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <cstdlib>
#include <cstring> // includes bzero
#include <iterator>
#include <iostream>

int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, clilen;
char buffer[256];
struct sockaddr_in serv_addr, cli_addr;
int n;
if (argc < 2) {
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
{
std::cout << "ERROR opening socket" << std::endl;
exit(-1);
}
bzero((char *) &serv_addr, sizeof(serv_addr));
portno = atoi(argv[1]);
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0)
{
std::cout << "ERROR on binding" << std::endl;
exit(-1);
}
listen(sockfd,5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd,
(struct sockaddr *) &cli_addr,
(socklen_t*)(&clilen));
if (newsockfd < 0)
{
std::cout << "ERROR on accept" << std::endl;
exit(-1);
}
bzero(buffer,256);
n = read(newsockfd,buffer,255);
if (n < 0)
{
std::cout << "ERROR reading from socket" << std::endl;
exit(-1);
}
printf("Here is the message: %s\n",buffer);
n = write(newsockfd,"I got your message",18);
if (n < 0)
{
std::cout << "ERROR writing to socket" << std::endl;
exit(-1);
}
return 0;
}

</source>

==CMakeLists.txt==
<source lang="cmake">
cmake_minimum_required(VERSION 2.6)

Project(Sockets)

ADD_EXECUTABLE(server server.cpp)
ADD_EXECUTABLE(client client.cpp)

</source>

← Older revision		Revision as of 17:53, 23 November 2010
Line 1:		Line 1:
		+	(Taken from here with non-trivial modifications: http://www.linuxhowtos.org/C_C++/socket.htm)
		+
	First run		First run
	server 51717		server 51717

CPP/Sockets - Revision history

Daviddoria at 17:53, 23 November 2010

Daviddoria: Created page with 'First run server 51717 Then run (while 'server' is still running): client localhost 51717 The client will ask you to type a message. Do this, and press enter. You will see th…'