/* * Copyright (C) 2022 Amazon.com Inc. or its affiliates. All rights reserved. * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception */ #include #include #include #include #include #include #ifdef __wasi__ #include #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; }