Nahrát soubory do '.'

This commit is contained in:
Matúš Sabol 2019-12-02 12:53:44 +00:00
parent e8774e9108
commit 566e2f03b5

47
program.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
void error(char *msg) {
//tato funkcia sa vyuziva ked systemove volanie zlyha
perror(msg); //vypise spravu o chybe a ukonci program server
exit(1);
}
int main(int argc, char *argv[]) {
int sockfd, newsockfd, portno, clilen, n; //pomocne premenne
char buffer[256]; //buffer pre ulozenie znakov zo socketu
struct sockaddr_in serv_addr; //obsahuje adresu servera
struct sockaddr_in cli_addr; //obsahuje adresu klienta
if (argc < 2) { //kontrola poctu argumentov
fprintf(stderr,"ERROR, no port provided\n");
exit(1);
} //vytvorenie socketu
sockfd = socket(PF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket"); //naplnenie struktury sockaddr_in
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); //zviazanie socketu sluzbou bind()
//printf("%s", hostent->h_name);
if (bind(sockfd, (struct sockaddr *) &serv_addr,
sizeof(serv_addr)) < 0)
error("ERROR on binding");
listen(sockfd,5); //vytvorime si front poziadaviek
clilen = sizeof(cli_addr); //velkost struktury adresy klienta //akceptovanie spojenia
newsockfd = accept(sockfd,(struct sockaddr *) &cli_addr,&clilen);
if (newsockfd < 0)
error("ERROR on accept");
bzero(buffer,256); //spracovanie dat od klientov
n = read(newsockfd,buffer,255);
if (n < 0)
error("ERROR reading from socket");
printf("Here is the message: %s\n",buffer);
n = write(newsockfd,"I got your message",18);
if (n < 0)
error("ERROR writing to socket");
return 0;
}