#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/stat.h>
#define PORT htons(2799)
void HandleConnection(int gn)
{
int out, real;
long In1;
char buff[2048];
const char* mode = "r";
char str[10];
FILE *fp;
if (recv(gn, &In1, sizeof(long), 0) == 0)
{
printf("Error while receiving!\n");
return;
}
real = ntohl(In1);
sprintf(str, "%d", real);
if (real==99){
long reed, seend, file_len, send_session;
struct stat fileinfo;
stat("10MB.pdf", &fileinfo);
send_session = 0;
fp = fopen("10MB.pdf", "rb");
file_len = fileinfo.st_size;
printf("%ld", file_len);
if (send(gn, &file_len, sizeof(long), 0) != sizeof(long))
{
printf("Error while sending\n");
close(gn);
}
while (send_session < file_len)
{
reed = fread(buff, 1, 2048, fp);
seend = send(gn, buff, reed, 0);
if (reed != seend)
break;
send_session += seend;
}}
else{
fp = fopen(str, mode);
fgets(buff, 2048, (FILE*)fp);
if (send(gn, buff, strlen(buff), 0) != strlen(buff))
{
printf("Error while sending\n");
close(gn);
}
fclose(fp);
}
}
int main(void)
{
int gn_nasluch, gn_klienta;
struct sockaddr_in adr;
socklen_t dladr = sizeof(struct sockaddr_in);
gn_nasluch = socket(PF_INET, SOCK_STREAM, 0);
adr.sin_family = AF_INET;
adr.sin_port = PORT;
adr.sin_addr.s_addr = INADDR_ANY;
memset(adr.sin_zero, 0, sizeof(adr.sin_zero));
if (bind(gn_nasluch, (struct sockaddr*) &adr, dladr) < 0)
{
printf("Port blocked \n");
return 1;
}
listen(gn_nasluch, 10);
while(1)
{
dladr = sizeof(struct sockaddr_in);
gn_klienta = accept(gn_nasluch, (struct sockaddr*) &adr, &dladr);
if (gn_klienta < 0)
printf("Connection from %s:%u\n",
inet_ntoa(adr.sin_addr),
ntohs(adr.sin_port)
);
printf("Created child process\n");
if (fork() == 0)
{
HandleConnection(gn_klienta);
close(gn_klienta);
exit(0);
}
else
{
printf("Waiting for another connection\n");
continue;
}
}
return 0;
}
