326 lines
9.3 KiB
C
326 lines
9.3 KiB
C
/* server-tls-threaded.c
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*
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* Copyright (C) 2006-2022 wolfSSL Inc.
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*
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* This file is part of wolfSSL. (formerly known as CyaSSL)
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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 02110-1301, USA
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*/
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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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/* wolfSSL */
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#include <wolfssl/options.h>
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#include <wolfssl/ssl.h>
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/* threads */
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#include <pthread.h>
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#define DEFAULT_PORT 11111
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#define MAX_CONCURRENT_THREADS 10
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#define CERT_FILE "../certs/server-cert.pem"
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#define KEY_FILE "../certs/server-key.pem"
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/* Thread argument package */
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struct targ_pkg {
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int open;
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pthread_t tid;
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int num;
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int connd;
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WOLFSSL_CTX* ctx;
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int* shutdown;
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};
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void* ClientHandler(void* args)
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{
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struct targ_pkg* pkg = args;
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WOLFSSL* ssl;
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char buff[256];
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size_t len;
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int ret;
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const char* reply = "I hear ya fa shizzle!\n";
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printf("thread %d open for business\n", pkg->num);
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/* Create a WOLFSSL object */
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if ((ssl = wolfSSL_new(pkg->ctx)) == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
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pkg->open = 1;
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pthread_exit(NULL);
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}
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/* Attach wolfSSL to the socket */
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printf("Handling thread %d on port %d\n", pkg->num, pkg->connd);
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wolfSSL_set_fd(ssl, pkg->connd);
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/* Establish TLS connection */
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do {
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ret = wolfSSL_accept(ssl);
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} while(wolfSSL_want_read(ssl));
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if (ret != WOLFSSL_SUCCESS) {
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printf("ret = %d\n", ret);
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fprintf(stderr, "wolfSSL_accept error = %d\n",
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wolfSSL_get_error(ssl, ret));
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pkg->open = 1;
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pthread_exit(NULL);
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}
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printf("Client %d connected successfully\n", pkg->num);
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/* Read the client data into our buff array */
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XMEMSET(buff, 0, sizeof(buff));
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do {
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ret = wolfSSL_read(ssl, buff, sizeof(buff)-1);
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/* TODO: Currently this thread can get stuck infinitely if client
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* disconnects, add timer to abort on a timeout eventually,
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* just an example for now so allow for possible stuck condition
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*/
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} while(wolfSSL_want_read(ssl));
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if (ret > 0) {
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/* Print to stdout any data the client sends */
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printf("Client %d said: %s\n", pkg->num, buff);
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} else {
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printf("wolfSSL_read encountered an error with code %d and msg %s\n",
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ret, wolfSSL_ERR_error_string(ret, buff));
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wolfSSL_free(ssl); /* Free the wolfSSL object */
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ssl = NULL;
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close(pkg->connd); /* Close the connection to the server */
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pkg->open = 1; /* Indicate that execution is over */
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pthread_exit(NULL); /* End thread execution */
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}
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/* Check for server shutdown command */
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if (XSTRNCMP(buff, "shutdown", 8) == 0) {
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printf("Shutdown command issued!\n");
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*pkg->shutdown = 1;
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}
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/* Write our reply into buff */
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XMEMSET(buff, 0, sizeof(buff));
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len = XSTRLEN(reply);
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XMEMCPY(buff, reply, len);
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/* Reply back to the client */
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do {
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ret = wolfSSL_write(ssl, buff, len);
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/* TODO: Currently this thread can get stuck infinitely if client
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* disconnects, add timer to abort on a timeout eventually,
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* just an example for now so allow for possible stuck condition
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*/
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} while (wolfSSL_want_write(ssl));
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if (ret != len) {
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printf("wolfSSL_write encountered an error with code %d and msg %s\n",
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ret, wolfSSL_ERR_error_string(ret, buff));
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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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ssl = NULL;
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close(pkg->connd); /* Close the connection to the server */
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pkg->open = 1; /* Indicate that execution is over */
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#if defined(HAVE_ECC) && defined(FP_ECC)
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wc_ecc_fp_free(); /* free per thread cache */
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#endif
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pthread_exit(NULL); /* End thread execution */
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}
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int main()
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{
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int ret;
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int sockfd = SOCKET_INVALID;
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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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int shutdown = 0;
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/* declare wolfSSL objects */
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WOLFSSL_CTX* ctx = NULL;
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/* declare thread variable */
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struct targ_pkg thread[MAX_CONCURRENT_THREADS];
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int i;
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/* Initialize wolfSSL */
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wolfSSL_Init();
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wolfSSL_Debugging_ON();
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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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ret = -1;
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goto exit;
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}
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/* Set the socket options to use nonblocking I/O */
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if (fcntl(sockfd, F_SETFL, O_NONBLOCK) == -1) {
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fprintf(stderr, "ERROR: failed to set socket options\n");
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ret = -1;
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goto exit;
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}
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/* Create and initialize WOLFSSL_CTX */
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#ifdef USE_TLSV13
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ctx = wolfSSL_CTX_new(wolfTLSv1_3_server_method());
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#else
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ctx = wolfSSL_CTX_new(wolfTLSv1_2_server_method());
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#endif
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if (ctx == NULL) {
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fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
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ret = -1;
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goto exit;
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}
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/* Load server certificates into WOLFSSL_CTX */
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if ((ret = wolfSSL_CTX_use_certificate_file(ctx, CERT_FILE, WOLFSSL_FILETYPE_PEM))
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!= WOLFSSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
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CERT_FILE);
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goto exit;
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}
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/* Load server key into WOLFSSL_CTX */
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if ((ret = wolfSSL_CTX_use_PrivateKey_file(ctx, KEY_FILE, WOLFSSL_FILETYPE_PEM))
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!= WOLFSSL_SUCCESS) {
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fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
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KEY_FILE);
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goto exit;
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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(DEFAULT_PORT); /* on DEFAULT_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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ret = -1;
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goto exit;
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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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ret = -1;
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goto exit;
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}
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/* Initialize thread array */
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for (i = 0; i < MAX_CONCURRENT_THREADS; ++i) {
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printf("Creating %d thread\n", i);
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thread[i].open = 1;
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thread[i].num = i;
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thread[i].ctx = ctx;
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thread[i].shutdown = &shutdown;
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}
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printf("Now open for connections\n");
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/* Continue to accept clients until shutdown is issued */
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while (!shutdown) {
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/* find an open thread or continue if there is none */
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for (i = 0; i < MAX_CONCURRENT_THREADS && !thread[i].open; ++i);
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if (i == MAX_CONCURRENT_THREADS) {
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continue;
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}
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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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continue;
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}
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/* Fill out the relevant thread argument package information */
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thread[i].open = 0;
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thread[i].connd = connd;
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/* Launch a thread to deal with the new client */
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pthread_create(&thread[i].tid, NULL, ClientHandler, &thread[i]);
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/* State that we won't be joining this thread */
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pthread_detach(thread[i].tid);
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}
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/* Suspend shutdown until all threads are closed */
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do {
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shutdown = 1;
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for (i = 0; i < MAX_CONCURRENT_THREADS; ++i) {
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if (!thread[i].open) {
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shutdown = 0;
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}
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}
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} while (!shutdown);
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printf("Shutdown complete\n");
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ret = 0;
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exit:
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/* Cleanup and return */
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if (sockfd != SOCKET_INVALID)
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close(sockfd); /* Close the socket listening for clients */
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if (ctx)
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wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
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wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
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return ret; /* Return reporting a success */
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}
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