socket 파일 전송 클라이언트

#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<ctype.h>

void error(const char *msg){
perror(msg);
exit(0);
}

int main(int argc, char *argv[]){
int sockfd, port_number, n;
struct sockaddr_in serv_addr;
struct hostent *server;

char buffer[1024];
if (argc < 3){
fprintf(stderr,"usage %s hostname port\n", argv[0]);
exit(0);
}
port_number = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
server = gethostbyname(argv[1]);
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(port_number);
if (connect(sockfd,(struct sockaddr *) &serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");

bzero(buffer,1024);

FILE *f;

int words = 0;
char c;
f=fopen("HeaN.txt","r");
while((c=getc(f))!=EOF){ //Counting No of words in the file
fscanf(f , "%s" , buffer);
if(isspace(c)||c=='\t')
words++;
}
//printf("Words = %d \n"  , words); //Ignore


write(sockfd, &words, sizeof(int));
rewind(f);

/*      fseek(f, 0L, SEEK_END);    // tells size of the file. Not rquired for the functionality in code.
int sz = ftell(f); //Just written for curiosity.
printf("Size is %d \n" , sz);
rewind(f);
*/

char ch ;
while(ch != EOF){

fscanf(f , "%s" , buffer);
//printf("%s\n" , buffer); //Ignore
write(sockfd,buffer,1024);
ch = fgetc(f);
}
printf("The file was sent successfully");

close(sockfd);
return 0;
}

// compile: gcc -o client client.c
// ./client 127.0.0.1 9999