#include "lib/common.h"
# define MAXLINE 4096
int main(int argc, char **argv) {
if (argc != 2) {
error(1, 0, "usage: udpclient1 <IPaddress>");
}
int socket_fd;
socket_fd = socket(AF_INET, SOCK_DGRAM, 0);
struct sockaddr_in server_addr;
bzero(&server_addr, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(SERV_PORT);
inet_pton(AF_INET, argv[1], &server_addr.sin_addr);
socklen_t server_len = sizeof(server_addr);
if (connect(socket_fd, (struct sockaddr *) &server_addr, server_len)) {
error(1, errno, "connect failed");
}
struct sockaddr *reply_addr;
reply_addr = malloc(server_len);
char send_line[MAXLINE], recv_line[MAXLINE + 1];
socklen_t len;
int n;
while (fgets(send_line, MAXLINE, stdin) != NULL) {
int i = strlen(send_line);
if (send_line[i - 1] == '\n') {
send_line[i - 1] = 0;
}
printf("now sending %s\n", send_line);
size_t rt = sendto(socket_fd, send_line, strlen(send_line), 0, (struct sockaddr *) &server_addr, server_len);
if (rt < 0) {
error(1, errno, "sendto failed");
}
printf("send bytes: %zu \n", rt);
len = 0;
recv_line[0] = 0;
n = recvfrom(socket_fd, recv_line, MAXLINE, 0, reply_addr, &len);
if (n < 0)
error(1, errno, "recvfrom failed");
recv_line[n] = 0;
fputs(recv_line, stdout);
fputs("\n", stdout);
}
exit(0);
}