mirror of
https://github.com/bytecodealliance/wasm-micro-runtime.git
synced 2024-11-26 15:32:05 +00:00
5ddc335a7f
Add a couple of socket examples that can be used with WAMR: - The `timeout_client` and `timeout_server` examples demonstrate socket send and receive timeouts using the socket options - The `multicast_client` and `multicast_server` examples demonstrate receiving multicast packets in WASM And add several macro controls for `socket_opts` example.
120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/*
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* Copyright (C) 2022 Amazon.com Inc. or its affiliates. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#ifdef __wasi__
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#include <wasi_socket_ext.h>
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#endif
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static int
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get_ip_addr_type(char *addr, char *buf)
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{
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if (inet_pton(AF_INET6, addr, buf)) {
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return AF_INET6;
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}
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if (inet_pton(AF_INET, addr, buf)) {
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return AF_INET;
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}
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return -1;
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}
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static int
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is_valid_addr_type(int addr_type)
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{
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return !(addr_type == -1
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|| (addr_type != AF_INET && addr_type != AF_INET6));
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}
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static void
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init_sockaddr_inet(struct sockaddr_in *addr, char *addr_buffer)
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{
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addr->sin_family = AF_INET;
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addr->sin_port = htons(1234);
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memcpy(&(addr->sin_addr), addr_buffer, 4);
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}
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static void
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init_sockaddr_inet6(struct sockaddr_in6 *addr, char *addr_buffer)
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{
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addr->sin6_family = AF_INET6;
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addr->sin6_port = htons(1234);
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memcpy(&(addr->sin6_addr), addr_buffer, 16);
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}
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int
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main(int argc, char *argv[])
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{
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struct sockaddr_storage addr = { 0 };
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int sd;
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char *databuf = "Test message";
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int datalen = strlen(databuf) + 1;
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char multicast_addr_buffer[16];
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int addr_type = -1;
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int multicast_interface;
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int bool_opt = 1;
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if (argc < 2) {
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printf("Usage is <Multicast IP>\n");
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return EXIT_FAILURE;
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}
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addr_type = get_ip_addr_type(argv[1], multicast_addr_buffer);
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if (!is_valid_addr_type(addr_type)) {
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printf("Not a valid ipv4 or ipv6 address\n");
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return EXIT_FAILURE;
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}
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if ((sd = socket(addr_type, SOCK_DGRAM, 0)) == -1) {
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return EXIT_FAILURE;
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}
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if (setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, &bool_opt, sizeof(bool_opt))
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== -1) {
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perror("Failed setting SO_REUSEADDR");
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goto fail;
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}
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if (addr_type == AF_INET) {
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multicast_interface = htonl(INADDR_ANY);
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if (setsockopt(sd, IPPROTO_IP, IP_MULTICAST_IF,
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(char *)&multicast_interface,
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sizeof(multicast_interface))) {
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perror("Failed setting local interface");
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goto fail;
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}
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init_sockaddr_inet((struct sockaddr_in *)&addr, multicast_addr_buffer);
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}
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else {
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multicast_interface = 0;
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if (setsockopt(sd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
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(char *)&multicast_interface,
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sizeof(multicast_interface))) {
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perror("Failed setting local interface");
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goto fail;
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}
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init_sockaddr_inet6((struct sockaddr_in6 *)&addr,
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multicast_addr_buffer);
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}
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if (sendto(sd, databuf, datalen, 0, (struct sockaddr *)&addr, sizeof(addr))
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== -1) {
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perror("Failed sending datagram");
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goto fail;
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}
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printf("Datagram sent\n");
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close(sd);
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return EXIT_SUCCESS;
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fail:
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close(sd);
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return EXIT_FAILURE;
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} |