214 lines
6.7 KiB
C
214 lines
6.7 KiB
C
/* server.c
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*
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* Copyright (C) 2006-2023 wolfSSL Inc.
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*
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* This file is part of wolfSSL.
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*
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* wolfSSL is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* wolfSSL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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#include "server.h"
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/* the usual suspects */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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/* socket includes */
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <unistd.h>
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/* <shared/util.h> includes */
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#include <shared/util.h>
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/* wolfSSL */
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#include <wolfssl/wolfcrypt/settings.h>
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#include <wolfssl/ssl.h>
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#include <wolfssl/certs_test.h>
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/* Azure Sphere */
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#include <applibs/log.h>
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#include <applibs/networking.h>
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#define BIND_PORT 11111
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#define CERT_BUF server_cert_der_2048
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#define SIZEOF_CERT_BUF sizeof_server_cert_der_2048
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#define KEY_BUF server_key_der_2048
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#define SIZEOF_KEY_BUF sizeof_server_key_der_2048
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#ifndef NO_MAIN_DRIVER
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int main(void)
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#else
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int azsphere_server_app(void)
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#endif
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{
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bool isNetworkingReady = false;
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int sockfd;
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int connd;
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struct sockaddr_in servAddr;
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struct sockaddr_in clientAddr;
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socklen_t size = sizeof(clientAddr);
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char buff[256];
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size_t len;
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int shutdown = 0;
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int ret;
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const char* reply = "I hear ya fa shizzle!\n";
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/* declare wolfSSL objects */
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WOLFSSL_CTX* ctx = NULL;
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WOLFSSL* ssl = NULL;
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util_PrintIfAddr();
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/* Check if the Azure Sphere Dev Board has network connectivity. */
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if ((Networking_IsNetworkingReady(&isNetworkingReady) < 0) || !isNetworkingReady) {
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fprintf(stderr,"Error: Network is not up.\n");
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return -1;
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}
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/* Initialize wolfSSL */
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wolfSSL_Init();
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/* Create a socket that uses an internet IPv4 address,
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* Sets the socket to be stream based (TCP),
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* 0 means choose the default protocol. */
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if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
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fprintf(stderr, "ERROR: failed to create the socket\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Create and initialize WOLFSSL_CTX */
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if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_server_method())) == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Load server certificates into WOLFSSL_CTX */
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if (wolfSSL_CTX_use_certificate_buffer(ctx, CERT_BUF, SIZEOF_CERT_BUF, SSL_FILETYPE_ASN1)
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!= SSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
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CERT_BUF);
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Load server key into WOLFSSL_CTX */
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if (wolfSSL_CTX_use_PrivateKey_buffer(ctx, KEY_BUF, SIZEOF_KEY_BUF, SSL_FILETYPE_ASN1)
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!= SSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
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KEY_BUF);
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Initialize the server address struct with zeros */
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memset(&servAddr, 0, sizeof(servAddr));
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/* Fill in the server address */
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servAddr.sin_family = AF_INET; /* using IPv4 */
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servAddr.sin_port = htons(BIND_PORT); /* on BIND_PORT */
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servAddr.sin_addr.s_addr = INADDR_ANY; /* from anywhere */
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/* Bind the server socket to our port */
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if (bind(sockfd, (struct sockaddr*)&servAddr, sizeof(servAddr)) == -1) {
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fprintf(stderr, "ERROR: failed to bind\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Listen for a new connection, allow 5 pending connections */
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if (listen(sockfd, 5) == -1) {
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fprintf(stderr, "ERROR: failed to listen\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Continue to accept clients until shutdown is issued */
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while (!shutdown) {
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printf("Waiting for a connection...\n");
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/* Accept client connections */
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if ((connd = accept(sockfd, (struct sockaddr*)&clientAddr, &size))
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== -1) {
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fprintf(stderr, "ERROR: failed to accept the connection\n\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Create a WOLFSSL object */
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if ((ssl = wolfSSL_new(ctx)) == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Attach wolfSSL to the socket */
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wolfSSL_set_fd(ssl, connd);
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/* Establish TLS connection */
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ret = wolfSSL_accept(ssl);
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if (ret != SSL_SUCCESS) {
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fprintf(stderr, "wolfSSL_accept error = %d\n",
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wolfSSL_get_error(ssl, ret));
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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printf("Client connected successfully\n");
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/* Read the client data into our buff array */
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memset(buff, 0, sizeof(buff));
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if (wolfSSL_read(ssl, buff, sizeof(buff)-1) == -1) {
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fprintf(stderr, "ERROR: failed to read\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Print to stdout any data the client sends */
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printf("Client: %s\n", buff);
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/* Check for server shutdown command */
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if (strncmp(buff, "shutdown", 8) == 0) {
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printf("Shutdown command issued!\n");
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shutdown = 1;
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}
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/* Write our reply into buff */
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memset(buff, 0, sizeof(buff));
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memcpy(buff, reply, strlen(reply));
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len = strnlen(buff, sizeof(buff));
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/* Reply back to the client */
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if (wolfSSL_write(ssl, buff, (int)len) != len) {
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fprintf(stderr, "ERROR: failed to write\n");
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util_Cleanup(sockfd, ctx, ssl);
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return -1;
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}
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/* Cleanup after this connection */
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wolfSSL_free(ssl); /* Free the wolfSSL object */
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close(connd); /* Close the connection to the client */
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}
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printf("Shutdown complete\n");
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/* Cleanup and return */
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util_Cleanup(sockfd, ctx, ssl);
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return 0; /* Return reporting a success */
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}
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