You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.5 KiB
53 lines
1.5 KiB
/* A simple server in the internet domain using TCP
|
|
The port number is passed as an argument */
|
|
/* code from: http://www.cs.rpi.edu/~moorthy/Courses/os98/Pgms/socket.html */
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <strings.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <unistd.h>
|
|
#include <netinet/in.h>
|
|
|
|
void
|
|
error(char *msg)
|
|
{
|
|
perror(msg);
|
|
exit(1);
|
|
}
|
|
|
|
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) error("ERROR opening socket");
|
|
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) error("ERROR on binding");
|
|
listen(sockfd, 5);
|
|
clilen = sizeof(cli_addr);
|
|
newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
|
|
if (newsockfd < 0) error("ERROR on accept");
|
|
bzero(buffer, 256);
|
|
n = recv(newsockfd, buffer, 255, 0);
|
|
if (n < 0) error("ERROR reading from socket");
|
|
printf("Here is the message: %s\n", buffer);
|
|
n = send(newsockfd, "I got your message", 18, 0);
|
|
if (n < 0) error("ERROR writing to socket");
|
|
close(newsockfd);
|
|
close(sockfd);
|
|
|
|
return 0;
|
|
}
|