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client.cpp
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97 lines (89 loc) · 2.48 KB
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <bits/stdc++.h>
using namespace std;
void error(const char *msg)
{
perror(msg);
exit(0);
}
int main(int argc, char *argv[])
{
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
char buffer[100];
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)
error("ERROR opening socket");
server = gethostbyname(argv[1]);
//printf("%s", server->h_name);
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,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");
cout << "connected" << endl;
bzero(buffer,104);
int c;
FILE * f = fopen("input.txt", "r");
int counter = 0;
int no_of_packets = 0;
buffer[0] = '0';
buffer[1] = '0';
buffer[2] = '0';
buffer[3] = '0';
counter = 3;
while ((c = fgetc(f)) != EOF) {
counter++;
if (counter == 103) {
buffer[103] = '\0';
counter = 4;
int temp = no_of_packets++;
n = write(sockfd,buffer,strlen(buffer));
if (n < 0) {
error("ERROR writing to socket");
}
bzero(buffer,104);
buffer[0] = (char)(no_of_packets / 1000 + '0');
no_of_packets %= 1000;
buffer[1] = (char)(no_of_packets / 100 + '0');
no_of_packets %= 100;
buffer[2] = (char)(no_of_packets / 10 + '0');
no_of_packets %= 10;
buffer[3] = (char)(no_of_packets + '0');
no_of_packets = temp;
}
buffer[counter] = (char)c;
cout << buffer[counter] << endl;
}
if (counter != 4) {
buffer[counter] = '\0';
cout << buffer << endl;
no_of_packets++;
n = write(sockfd,buffer,strlen(buffer));
if (n < 0) {
error("ERROR writing to socket");
}
}
close(sockfd);
return 0;
}