1 files changed, 122 insertions, 0 deletions
diff --git a/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/socket-api/wasm-src/udp_server.c b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/socket-api/wasm-src/udp_server.c
new file mode 100644
index 000000000..588964145
--- /dev/null
+++ b/fluent-bit/lib/wasm-micro-runtime-WAMR-1.2.2/samples/socket-api/wasm-src/udp_server.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2022 Amazon.com Inc. or its affiliates. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#include "socket_utils.h"
+
+#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
+
+#define MAX_CONNECTIONS_COUNT 5
+
+static void
+init_sockaddr_inet(struct sockaddr_in *addr)
+{
+    /* 0.0.0.0:1234 */
+    addr->sin_family = AF_INET;
+    addr->sin_port = htons(1234);
+    addr->sin_addr.s_addr = htonl(INADDR_ANY);
+}
+
+static void
+init_sockaddr_inet6(struct sockaddr_in6 *addr)
+{
+    /* [::]:1234 */
+    addr->sin6_family = AF_INET6;
+    addr->sin6_port = htons(1234);
+    addr->sin6_addr = in6addr_any;
+}
+
+int
+main(int argc, char *argv[])
+{
+    int socket_fd = -1, af;
+    socklen_t addrlen = 0;
+    struct sockaddr_storage addr = { 0 };
+    char *reply_message = "Hello from server";
+    unsigned connections = 0;
+    char ip_string[64] = { 0 };
+    char buffer[1024] = { 0 };
+
+    if (argc > 1 && strcmp(argv[1], "inet6") == 0) {
+        af = AF_INET6;
+        addrlen = sizeof(struct sockaddr_in6);
+        init_sockaddr_inet6((struct sockaddr_in6 *)&addr);
+    }
+    else {
+        af = AF_INET;
+        addrlen = sizeof(struct sockaddr_in);
+        init_sockaddr_inet((struct sockaddr_in *)&addr);
+    }
+
+    printf("[Server] Create socket\n");
+    socket_fd = socket(af, SOCK_DGRAM, 0);
+    if (socket_fd < 0) {
+        perror("Create socket failed");
+        goto fail;
+    }
+
+    printf("[Server] Bind socket\n");
+    if (bind(socket_fd, (struct sockaddr *)&addr, addrlen) < 0) {
+        perror("Bind failed");
+        goto fail;
+    }
+
+    printf("[Server] Wait for clients to connect ..\n");
+    while (connections < MAX_CONNECTIONS_COUNT) {
+        addrlen = sizeof(addr);
+        /* make sure there is space for the string terminator */
+        int ret = recvfrom(socket_fd, buffer, sizeof(buffer) - 1, 0,
+                           (struct sockaddr *)&addr, &addrlen);
+        if (ret < 0) {
+            perror("Read failed");
+            goto fail;
+        }
+        buffer[ret] = '\0';
+
+        if (sockaddr_to_string((struct sockaddr *)&addr, ip_string,
+                               sizeof(ip_string) / sizeof(ip_string[0]))
+            != 0) {
+            printf("[Server] failed to parse client address\n");
+            goto fail;
+        }
+
+        printf("[Server] received %d bytes from %s: %s\n", ret, ip_string,
+               buffer);
+
+        if (sendto(socket_fd, reply_message, strlen(reply_message), 0,
+                   (struct sockaddr *)&addr, addrlen)
+            < 0) {
+            perror("Send failed");
+            break;
+        }
+
+        connections++;
+    }
+
+    if (connections == MAX_CONNECTIONS_COUNT) {
+        printf("[Server] Achieve maximum amount of connections\n");
+    }
+
+    printf("[Server] Shuting down ..\n");
+    shutdown(socket_fd, SHUT_RDWR);
+    close(socket_fd);
+    sleep(3);
+    printf("[Server] BYE \n");
+    return EXIT_SUCCESS;
+
+fail:
+    printf("[Server] Shuting down ..\n");
+    if (socket_fd >= 0)
+        close(socket_fd);
+    sleep(3);
+    return EXIT_FAILURE;
+}