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/*
* Copyright (C) 2022 Amazon.com Inc. or its affiliates. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#ifdef __wasi__
#include <wasi_socket_ext.h>
#endif
static void
init_sockaddr_inet(struct sockaddr_in *addr)
{
/* 127.0.0.1:1234 */
addr->sin_family = AF_INET;
addr->sin_port = htons(1234);
addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
}
static void
init_sockaddr_inet6(struct sockaddr_in6 *addr)
{
/* [::1]:1234 */
addr->sin6_family = AF_INET6;
addr->sin6_port = htons(1234);
addr->sin6_addr = in6addr_loopback;
}
int
main(int argc, char *argv[])
{
int socket_fd, ret, af;
char buffer[1024] = { 0 };
socklen_t serverlen;
struct sockaddr_storage server_address = { 0 };
const char *message = "Hello from client";
if (argc > 1 && strcmp(argv[1], "inet6") == 0) {
af = AF_INET6;
init_sockaddr_inet6((struct sockaddr_in6 *)&server_address);
serverlen = sizeof(struct sockaddr_in6);
}
else {
af = AF_INET;
init_sockaddr_inet((struct sockaddr_in *)&server_address);
serverlen = sizeof(struct sockaddr_in);
}
printf("[Client] Create socket\n");
socket_fd = socket(af, SOCK_DGRAM, 0);
if (socket_fd == -1) {
perror("Create socket failed");
return EXIT_FAILURE;
}
printf("[Client] Client send\n");
ret = sendto(socket_fd, message, strlen(message), 0,
(struct sockaddr *)&server_address, serverlen);
if (ret < 0) {
close(socket_fd);
perror("Send failed");
return EXIT_FAILURE;
}
printf("[Client] Client receive\n");
serverlen = sizeof(server_address);
/* make sure there is space for the string terminator */
ret = recvfrom(socket_fd, buffer, sizeof(buffer) - 1, 0,
(struct sockaddr *)&server_address, &serverlen);
if (ret > 0) {
buffer[ret] = '\0';
printf("[Client] Buffer recieved: %s\n", buffer);
}
close(socket_fd);
printf("[Client] BYE \n");
return EXIT_SUCCESS;
}
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