Merge branch 'master' of https://github.com/wolfssl/wolfssl-examples
kaleb-himes
commit
59ab351e28
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@ -34,6 +34,7 @@ android/wolfssljni-ndk-sample/proguard-project.txt
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# Example executables
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/dtls/client-dtls-nonblocking
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/dtls/client-dtls-resume
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/dtls/client-dtls-shared
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/dtls/client-dtls
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/dtls/client-udp
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/dtls/server-dtls-nonblocking
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@ -2,7 +2,7 @@ CC=gcc
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CFLAGS=-Wall -DWOLFSSL_DTLS
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LIBS=-lwolfssl -lpthread
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all: client-udp client-dtls client-dtls-nonblocking client-dtls-resume server-udp server-dtls server-dtls-nonblocking server-dtls-threaded
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all: client-udp client-dtls client-dtls-nonblocking client-dtls-resume client-dtls-shared server-udp server-dtls server-dtls-nonblocking server-dtls-threaded
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client-udp: client-udp.o
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$(CC) -o $@ $^ $(CFLAGS)
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@ -16,6 +16,9 @@ client-dtls-nonblocking: client-dtls-nonblocking.o
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client-dtls-resume: client-dtls-resume.o
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$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
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client-dtls-shared: client-dtls-shared.o
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$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
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server-udp: server-udp.o
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$(CC) -o $@ $^ $(CFLAGS)
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@ -32,4 +35,4 @@ server-dtls-threaded: server-dtls-threaded.o
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.PHONY: clean all
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clean:
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rm -f *.o client-udp client-dtls client-dtls-nonblocking client-dtls-resume server-udp server-dtls server-dtls-nonblocking server-dtls-threaded
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rm -f *.o client-udp client-dtls client-dtls-nonblocking client-dtls-resume client-dtls-shared server-udp server-dtls server-dtls-nonblocking server-dtls-threaded
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@ -0,0 +1,268 @@
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/*
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* client-dtls-shared.c
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*
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* Copyright (C) 2006-2017 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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*=============================================================================
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*
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* DTLS client example using multi-thread shared wrapper for
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* instructional/learning purposes.
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*/
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#include <wolfssl/options.h>
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#include <wolfssl/ssl.h>
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#include <wolfssl/wolfcrypt/wc_port.h>
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#include <unistd.h>
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#include <netdb.h>
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#include <signal.h>
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pthread.h>
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#define MAXBUF 1024
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#define MAXMSGS 100
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/* number of writer threads */
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#define THREADS 3
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#define SERV_PORT 11111
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typedef struct SharedDtls {
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wolfSSL_Mutex shared_mutex; /* mutex for using */
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WOLFSSL* ssl; /* WOLFSSL object being shared */
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int sd; /* socket fd */
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struct sockaddr_in servAddr; /* server sockaddr */
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socklen_t servSz; /* length of servAddr */
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char* recvBuf; /* I/O recv cb buffer */
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int recvSz; /* bytes in recvBuf */
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int handShakeDone; /* is the handshake done? */
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} SharedDtls;
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int dtls_sendto_cb(WOLFSSL* ssl, char* buf, int sz, void* ctx)
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{
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SharedDtls* shared = (SharedDtls*)ctx;
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return sendto(shared->sd, buf, sz, 0,
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(const struct sockaddr*)&shared->servAddr, shared->servSz);
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}
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static int min(int a, int b)
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{
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return a > b ? b : a;
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}
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int dtls_recvfrom_cb(WOLFSSL* ssl, char* buf, int sz, void* ctx)
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{
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SharedDtls* shared = (SharedDtls*)ctx;
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if (!shared->handShakeDone) {
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/* get directly from socket */
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return recvfrom(shared->sd, buf, sz, 0, NULL, NULL);
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} else {
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/* get the "pushed" datagram from our cb buffer instead */
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int copied = min(sz, shared->recvSz);
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memcpy(buf, shared->recvBuf, copied);
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shared->recvSz -= copied;
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return copied;
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}
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}
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/* each thread should have a simple id at startup */
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char get_id(SharedDtls* shared)
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{
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char ids[] = "abcdefgh";
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char ret;
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static int index = 0;
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wc_LockMutex(&shared->shared_mutex);
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ret = ids[index++];
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wc_UnLockMutex(&shared->shared_mutex);
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return ret;
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}
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/* DTLS Send function in its own thread */
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void* DatagramSend(void* arg)
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{
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int i;
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int sendSz;
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char sendBuf[MAXBUF];
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SharedDtls* shared = (SharedDtls*)arg;
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char id = get_id(shared);
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WOLFSSL* ssl = shared->ssl;
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for (i= 0; i < MAXMSGS; i++) {
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snprintf(sendBuf, MAXBUF, "thread %c sending msg %d\n", id, i);
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sendSz = strlen(sendBuf) + 1;
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wc_LockMutex(&shared->shared_mutex);
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if ( (wolfSSL_write(ssl, sendBuf, sendSz)) != sendSz) {
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printf("wolfSSL_write failed");
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}
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wc_UnLockMutex(&shared->shared_mutex);
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}
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return NULL;
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}
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/* DTLS Recv function */
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void DatagramRecv(WOLFSSL* ssl, SharedDtls* shared)
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{
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int i;
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int sz = 0;
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char recvBuf[MAXBUF];
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char plainBuf[MAXBUF];
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for (i = 0; i < THREADS*MAXMSGS; i++) {
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/* first get datagram, works in blocking mode too */
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sz = recvfrom(shared->sd, recvBuf, MAXBUF, 0, NULL, NULL);
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wc_LockMutex(&shared->shared_mutex);
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/* push datagram to our cb, no copy needed! */
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shared->recvBuf = recvBuf;
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shared->recvSz = sz;
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/* get plaintext */
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if ( (sz = (wolfSSL_read(ssl, plainBuf, MAXBUF-1))) < 0) {
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printf("wolfSSL_write failed");
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}
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wc_UnLockMutex(&shared->shared_mutex);
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plainBuf[MAXBUF-1] = '\0';
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printf("got msg %s\n", plainBuf);
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}
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}
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int main (int argc, char** argv)
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{
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int sockfd = 0, i;
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WOLFSSL* ssl = 0;
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WOLFSSL_CTX* ctx = 0;
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char* ca = "../certs/ca-cert.pem";
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char* ecc_ca = "../certs/server-ecc.pem";
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SharedDtls shared;
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if (argc != 2) {
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printf("usage: udpcli <IP address>\n");
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return 1;
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}
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wolfSSL_Init();
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if ( (ctx = wolfSSL_CTX_new(wolfDTLSv1_2_client_method())) == NULL) {
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fprintf(stderr, "wolfSSL_CTX_new error.\n");
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return 1;
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}
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if (wolfSSL_CTX_load_verify_locations(ctx, ca, 0) != SSL_SUCCESS) {
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fprintf(stderr, "Error loading %s, please check the file.\n", ca);
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return 1;
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}
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if (wolfSSL_CTX_load_verify_locations(ctx, ecc_ca, 0) != SSL_SUCCESS) {
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fprintf(stderr, "Error loading %s, please check the file.\n", ecc_ca);
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return 1;
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}
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wolfSSL_SetIOSend(ctx, dtls_sendto_cb);
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wolfSSL_SetIORecv(ctx, dtls_recvfrom_cb);
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ssl = wolfSSL_new(ctx);
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if (ssl == NULL) {
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printf("unable to get ssl object");
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return 1;
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}
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memset(&shared.servAddr, 0, sizeof(shared.servAddr));
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shared.servAddr.sin_family = AF_INET;
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shared.servAddr.sin_port = htons(SERV_PORT);
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if (inet_pton(AF_INET, argv[1], &shared.servAddr.sin_addr) < 1) {
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printf("Error and/or invalid IP address");
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return 1;
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}
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if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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printf("cannot create a socket.");
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return 1;
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}
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shared.sd = sockfd;
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shared.servSz = sizeof(shared.servAddr);
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shared.ssl = ssl;
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shared.handShakeDone = 0;
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if (wc_InitMutex(&shared.shared_mutex) != 0) {
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printf("wc_InitMutex failed");
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return 1;
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}
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wolfSSL_SetIOWriteCtx(ssl, &shared);
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wolfSSL_SetIOReadCtx(ssl, &shared);
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if (wolfSSL_connect(ssl) != SSL_SUCCESS) {
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int err1 = wolfSSL_get_error(ssl, 0);
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printf("err = %d, %s\n", err1, wolfSSL_ERR_reason_error_string(err1));
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printf("SSL_connect failed");
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return 1;
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}
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shared.handShakeDone = 1;
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pthread_t tid[THREADS];
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for (i = 0; i < THREADS; i++) {
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pthread_create(&tid[i], NULL, DatagramSend, &shared);
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}
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DatagramRecv(ssl, &shared);
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for (i = 0; i < THREADS; i++) {
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pthread_join(tid[i], NULL);
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}
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wolfSSL_shutdown(ssl);
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wolfSSL_free(ssl);
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close(sockfd);
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wolfSSL_CTX_free(ctx);
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wc_FreeMutex(&shared.shared_mutex);
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wolfSSL_Cleanup();
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return 0;
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}
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