WolfSSL
/
wolfssl-examples
mirror of https://github.com/wolfSSL/wolfssl-examples.git
1
0
Fork 0
Code Issues Releases Wiki Activity
wolfssl-examples/tls/server-tls-threaded.c

321 lines
9.2 KiB
C
Raw Permalink Blame History

/* server-tls-threaded.c
*
* Copyright (C) 2006-2022 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* the usual suspects */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/* socket includes */
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <unistd.h>
/* wolfSSL */
#include <wolfssl/options.h>
#include <wolfssl/ssl.h>
/* threads */
#include <pthread.h>
#define DEFAULT_PORT 11111
#define MAX_CONCURRENT_THREADS 10
#define CERT_FILE "../certs/server-cert.pem"
#define KEY_FILE "../certs/server-key.pem"
/* Thread argument package */
struct targ_pkg {
int open;
pthread_t tid;
int num;
int connd;
WOLFSSL_CTX* ctx;
int* shutdown;
};
void* ClientHandler(void* args)
{
struct targ_pkg* pkg = args;
WOLFSSL* ssl;
char buff[256];
size_t len;
int ret;
const char* reply = "I hear ya fa shizzle!\n";
printf("thread %d open for business\n", pkg->num);
/* Create a WOLFSSL object */
if ((ssl = wolfSSL_new(pkg->ctx)) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL object\n");
pkg->open = 1;
pthread_exit(NULL);
}
/* Attach wolfSSL to the socket */
printf("Handling thread %d on port %d\n", pkg->num, pkg->connd);
wolfSSL_set_fd(ssl, pkg->connd);
/* Establish TLS connection */
do {
ret = wolfSSL_accept(ssl);
} while(wolfSSL_want_read(ssl));
if (ret != WOLFSSL_SUCCESS) {
printf("ret = %d\n", ret);
fprintf(stderr, "wolfSSL_accept error = %d\n",
wolfSSL_get_error(ssl, ret));
pkg->open = 1;
pthread_exit(NULL);
}
printf("Client %d connected successfully\n", pkg->num);
/* Read the client data into our buff array */
XMEMSET(buff, 0, sizeof(buff));
do {
ret = wolfSSL_read(ssl, buff, sizeof(buff)-1);
/* TODO: Currently this thread can get stuck infinitely if client
* disconnects, add timer to abort on a timeout eventually,
* just an example for now so allow for possible stuck condition
*/
} while(wolfSSL_want_read(ssl));
if (ret > 0) {
/* Print to stdout any data the client sends */
printf("Client %d said: %s\n", pkg->num, buff);
} else {
printf("wolfSSL_read encountered an error with code %d and msg %s\n",
ret, wolfSSL_ERR_error_string(ret, buff));
wolfSSL_free(ssl); /* Free the wolfSSL object */
ssl = NULL;
close(pkg->connd); /* Close the connection to the server */
pkg->open = 1; /* Indicate that execution is over */
pthread_exit(NULL); /* End thread execution */
}
/* Check for server shutdown command */
if (XSTRNCMP(buff, "shutdown", 8) == 0) {
printf("Shutdown command issued!\n");
*pkg->shutdown = 1;
}
/* Write our reply into buff */
XMEMSET(buff, 0, sizeof(buff));
len = XSTRLEN(reply);
XMEMCPY(buff, reply, len);
/* Reply back to the client */
do {
ret = wolfSSL_write(ssl, buff, len);
/* TODO: Currently this thread can get stuck infinitely if client
* disconnects, add timer to abort on a timeout eventually,
* just an example for now so allow for possible stuck condition
*/
} while (wolfSSL_want_write(ssl));
if (ret != len) {
printf("wolfSSL_write encountered an error with code %d and msg %s\n",
ret, wolfSSL_ERR_error_string(ret, buff));
}
/* Cleanup after this connection */
wolfSSL_free(ssl); /* Free the wolfSSL object */
ssl = NULL;
close(pkg->connd); /* Close the connection to the server */
pkg->open = 1; /* Indicate that execution is over */
#if defined(HAVE_ECC) && defined(FP_ECC)
wc_ecc_fp_free(); /* free per thread cache */
#endif
pthread_exit(NULL); /* End thread execution */
}
int main()
{
int ret;
int sockfd = SOCKET_INVALID;
int connd;
struct sockaddr_in servAddr;
struct sockaddr_in clientAddr;
socklen_t size = sizeof(clientAddr);
int shutdown = 0;
/* declare wolfSSL objects */
WOLFSSL_CTX* ctx = NULL;
/* declare thread variable */
struct targ_pkg thread[MAX_CONCURRENT_THREADS];
int i;
/* Initialize wolfSSL */
wolfSSL_Init();
wolfSSL_Debugging_ON();
/* Create a socket that uses an internet IPv4 address,
* Sets the socket to be stream based (TCP),
* 0 means choose the default protocol. */
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
fprintf(stderr, "ERROR: failed to create the socket\n");
ret = -1;
goto exit;
}
/* Set the socket options to use nonblocking I/O */
if (fcntl(sockfd, F_SETFL, O_NONBLOCK) == -1) {
fprintf(stderr, "ERROR: failed to set socket options\n");
ret = -1;
goto exit;
}
/* Create and initialize WOLFSSL_CTX */
if ((ctx = wolfSSL_CTX_new(wolfTLSv1_2_server_method())) == NULL) {
fprintf(stderr, "ERROR: failed to create WOLFSSL_CTX\n");
ret = -1;
goto exit;
}
/* Load server certificates into WOLFSSL_CTX */
if ((ret = wolfSSL_CTX_use_certificate_file(ctx, CERT_FILE, WOLFSSL_FILETYPE_PEM))
!= WOLFSSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
CERT_FILE);
goto exit;
}
/* Load server key into WOLFSSL_CTX */
if ((ret = wolfSSL_CTX_use_PrivateKey_file(ctx, KEY_FILE, WOLFSSL_FILETYPE_PEM))
!= WOLFSSL_SUCCESS) {
fprintf(stderr, "ERROR: failed to load %s, please check the file.\n",
KEY_FILE);
goto exit;
}
/* Initialize the server address struct with zeros */
memset(&servAddr, 0, sizeof(servAddr));
/* Fill in the server address */
servAddr.sin_family = AF_INET; /* using IPv4 */
servAddr.sin_port = htons(DEFAULT_PORT); /* on DEFAULT_PORT */
servAddr.sin_addr.s_addr = INADDR_ANY; /* from anywhere */
/* Bind the server socket to our port */
if (bind(sockfd, (struct sockaddr*)&servAddr, sizeof(servAddr)) == -1) {
fprintf(stderr, "ERROR: failed to bind\n");
ret = -1;
goto exit;
}
/* Listen for a new connection, allow 5 pending connections */
if (listen(sockfd, 5) == -1) {
fprintf(stderr, "ERROR: failed to listen\n");
ret = -1;
goto exit;
}
/* Initialize thread array */
for (i = 0; i < MAX_CONCURRENT_THREADS; ++i) {
printf("Creating %d thread\n", i);
thread[i].open = 1;
thread[i].num = i;
thread[i].ctx = ctx;
thread[i].shutdown = &shutdown;
}
printf("Now open for connections\n");
/* Continue to accept clients until shutdown is issued */
while (!shutdown) {
/* find an open thread or continue if there is none */
for (i = 0; i < MAX_CONCURRENT_THREADS && !thread[i].open; ++i);
if (i == MAX_CONCURRENT_THREADS) {
continue;
}
/* Accept client connections */
if ((connd = accept(sockfd, (struct sockaddr*)&clientAddr, &size))
== -1) {
continue;
}
/* Fill out the relevant thread argument package information */
thread[i].open = 0;
thread[i].connd = connd;
/* Launch a thread to deal with the new client */
pthread_create(&thread[i].tid, NULL, ClientHandler, &thread[i]);
/* State that we won't be joining this thread */
pthread_detach(thread[i].tid);
}
/* Suspend shutdown until all threads are closed */
do {
shutdown = 1;
for (i = 0; i < MAX_CONCURRENT_THREADS; ++i) {
if (!thread[i].open) {
shutdown = 0;
}
}
} while (!shutdown);
printf("Shutdown complete\n");
ret = 0;
exit:
/* Cleanup and return */
if (sockfd != SOCKET_INVALID)
close(sockfd); /* Close the socket listening for clients */
if (ctx)
wolfSSL_CTX_free(ctx); /* Free the wolfSSL context object */
wolfSSL_Cleanup(); /* Cleanup the wolfSSL environment */
return ret; /* Return reporting a success */
}
Reference in New Issue View Git Blame Copy Permalink