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#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <unistd.h>
#include <stdbool.h>
#include <fcntl.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <signal.h>
#define __FAIL EXIT_FAILURE
#define BACKLOG 2
#define __PORT "62000"
#define BUF_SZ_2 2048
void talk_to_server (int sockfd) {
while (1) {
char editbuffer[BUF_SZ_2];
fprintf(stdout, ": ");
char *fgs = fgets(editbuffer, BUF_SZ_2, stdin);
socklen_t fgs_len = strlen(editbuffer);
if (fgs == NULL) {
continue;
}
if (editbuffer[0] == '\n') {
send(sockfd, editbuffer, fgs_len, 0);
continue;
} else {
send(sockfd, editbuffer, fgs_len, 0);
continue;
}
}
}
void INThandler(int sockfd) {
fprintf(stderr, "\n");
close(sockfd);
exit(0);
}
int main (int argc, char *argv[]) {
if (argc != 2) {
fprintf(stderr, "USAGE: %s [IP]\n", argv[0]);
exit(__FAIL);
}
int sockfd = -1;
int gai_result;
int connect_result = -1;
struct addrinfo hints;
struct addrinfo *res;
struct addrinfo *p;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
gai_result = getaddrinfo(argv[1], __PORT, &hints, &res);
if (gai_result != 0) {
fprintf(stderr, "getaddrinfo: %d\n", gai_result);
exit(__FAIL);
}
for (p = res ; p != NULL ; p = p->ai_next) {
sockfd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
if (sockfd == -1) {
fprintf(stderr, "socket fail\n");
continue;
}
connect_result = connect(sockfd, p->ai_addr, p->ai_addrlen);
if (connect_result == -1) {
fprintf(stderr, "connect fail\n");
continue;
}
}
if (connect_result == -1 || sockfd == -1) {
close(sockfd);
exit(__FAIL);
}
signal(SIGINT, INThandler);
freeaddrinfo(res);
talk_to_server(sockfd);
return 0;
}
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