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.
52 lines
1.5 KiB
52 lines
1.5 KiB
5 years ago
|
/* 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 <sys/types.h>
|
||
|
|
#include <sys/socket.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;
|
||
|
|
}
|