#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#define BUF_SIZE 1024
void error_handling(char *message);
int main(int argc, char *argv[]){
int sock;
char message[BUF_SIZE];
int str_len, recv_len, recv_cnt;
struct sockaddr_in serv_addr;
if(argc!=3){
printf("Usage : %s <IP> <PORT>\n",argv[0]);
exit(1);
}
sock = socket(PF_INET, SOCK_STREAM, 0);
if(sock==-1){
error_handling("socket() error");
}
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = inet_addr(argv[1]);
serv_addr.sin_port = htons(atoi(argv[2]));
if(connect(sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr))==-1){
error_handling("connect() error");
}
else{
printf("Connect……");
}
while(1)
{
fputs("Input message(Q to quit)", stdout);
fgets(message, BUF_SIZE, stdin);
if(!strcmp(message, 'q\n') || !strcmp(message, 'Q\n')){
break;
}
str_len = write(sock, message, strlen(message));
recv_len = 0;
while(recv_len < str_len)
{
recv_cnt = read(sock, &message[recv_len], BUF_SIZE-1);
if(recv_cnt == -1){
error_handling("read() error");
}
recv_len += recv_cnt;
}
message[recv_cnt]=0;
printf("Message from server : %s", message);
}
close(sock);
return 0;
}
void error_handling(char *message){
fputs(message, stderr);
fputc('\n', stderr);
exit(1);
}