First pass at creating a DTLS example using custom IO callbacks.
David Garske
parent
cae49407e7
commit
abc83e84fb
|
|
@ -2,7 +2,7 @@ CC=gcc
|
|||
CFLAGS=-Wall -DWOLFSSL_DTLS
|
||||
LIBS=-lwolfssl -lpthread
|
||||
|
||||
all: client-udp client-dtls client-dtls-nonblocking client-dtls-resume client-dtls-shared server-udp server-dtls server-dtls-nonblocking server-dtls-threaded client-dtls-ipv6 server-dtls-ipv6
|
||||
all: client-udp client-dtls client-dtls-nonblocking client-dtls-resume client-dtls-shared server-udp server-dtls server-dtls-nonblocking server-dtls-threaded client-dtls-ipv6 server-dtls-ipv6 client-dtls-callback server-dtls-callback
|
||||
|
||||
client-udp: client-udp.o
|
||||
$(CC) -o $@ $^ $(CFLAGS)
|
||||
|
|
@ -37,7 +37,13 @@ server-dtls-nonblocking: server-dtls-nonblocking.o
|
|||
server-dtls-threaded: server-dtls-threaded.o
|
||||
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
|
||||
|
||||
client-dtls-callback: client-dtls-callback.o
|
||||
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
|
||||
|
||||
server-dtls-callback: server-dtls-callback.o
|
||||
$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
|
||||
|
||||
.PHONY: clean all
|
||||
|
||||
clean:
|
||||
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 server-dtls-ipv6 client-dtls-ipv6
|
||||
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 server-dtls-ipv6 client-dtls-ipv6 client-dtls-callback server-dtls-callback
|
||||
|
|
|
|||
|
|
@ -0,0 +1,281 @@
|
|||
/*
|
||||
* client-dtls-callback.c
|
||||
*
|
||||
* Copyright (C) 2006-2015 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
|
||||
*
|
||||
*=============================================================================
|
||||
*
|
||||
* Bare-bones example of a DTLS client for instructional/learning purposes.
|
||||
*/
|
||||
|
||||
#include <wolfssl/options.h>
|
||||
#include <unistd.h>
|
||||
#include <wolfssl/ssl.h>
|
||||
#include <netdb.h>
|
||||
#include <signal.h>
|
||||
#include <sys/socket.h>
|
||||
#include <arpa/inet.h>
|
||||
#include <netinet/in.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#define MAXLINE 4096
|
||||
#define SERV_PORT 11111
|
||||
|
||||
typedef struct SharedDtls {
|
||||
WOLFSSL* ssl; /* WOLFSSL object being shared */
|
||||
int sd; /* socket fd */
|
||||
struct sockaddr_in servAddr; /* server sockaddr */
|
||||
socklen_t servSz; /* length of servAddr */
|
||||
char* recvBuf; /* I/O recv cb buffer */
|
||||
int recvSz; /* bytes in recvBuf */
|
||||
int handShakeDone; /* is the handshake done? */
|
||||
} SharedDtls;
|
||||
|
||||
|
||||
int my_IORecv(WOLFSSL* ssl, char* buff, int sz, void* ctx)
|
||||
{
|
||||
SharedDtls* shared = (SharedDtls*)ctx;
|
||||
int recvd;
|
||||
|
||||
printf("my_IORecv sz %d\n", sz);
|
||||
|
||||
|
||||
/* Receive message from socket */
|
||||
recvd = recvfrom(shared->sd, buff, sz, 0, NULL, NULL);
|
||||
if (recvd == -1) {
|
||||
/* error encountered. Be responsible and report it in wolfSSL terms */
|
||||
|
||||
fprintf(stderr, "IO RECEIVE ERROR: ");
|
||||
switch (errno) {
|
||||
#if EAGAIN != EWOULDBLOCK
|
||||
case EAGAIN: /* EAGAIN == EWOULDBLOCK on some systems, but not others */
|
||||
#endif
|
||||
case EWOULDBLOCK:
|
||||
if (!wolfSSL_dtls(ssl) || wolfSSL_get_using_nonblock(ssl)) {
|
||||
fprintf(stderr, "would block\n");
|
||||
return WOLFSSL_CBIO_ERR_WANT_READ;
|
||||
}
|
||||
else {
|
||||
fprintf(stderr, "socket timeout\n");
|
||||
return WOLFSSL_CBIO_ERR_TIMEOUT;
|
||||
}
|
||||
case ECONNRESET:
|
||||
fprintf(stderr, "connection reset\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_RST;
|
||||
case EINTR:
|
||||
fprintf(stderr, "socket interrupted\n");
|
||||
return WOLFSSL_CBIO_ERR_ISR;
|
||||
case ECONNREFUSED:
|
||||
fprintf(stderr, "connection refused\n");
|
||||
return WOLFSSL_CBIO_ERR_WANT_READ;
|
||||
case ECONNABORTED:
|
||||
fprintf(stderr, "connection aborted\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
|
||||
default:
|
||||
fprintf(stderr, "general error\n");
|
||||
return WOLFSSL_CBIO_ERR_GENERAL;
|
||||
}
|
||||
}
|
||||
else if (recvd == 0) {
|
||||
printf("Connection closed\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
|
||||
}
|
||||
|
||||
printf("my_IORecv recvd %d \n", recvd);
|
||||
|
||||
/* successful receive */
|
||||
printf("my_IORecv: received %d bytes from %d\n", sz, shared->sd);
|
||||
return recvd;
|
||||
}
|
||||
|
||||
|
||||
int my_IOSend(WOLFSSL* ssl, char* buff, int sz, void* ctx)
|
||||
{
|
||||
SharedDtls* shared = (SharedDtls*)ctx;
|
||||
int sent;
|
||||
|
||||
printf("my_IOSend sz %d\n", sz);
|
||||
|
||||
|
||||
sent = sendto(shared->sd, buff, sz, 0,
|
||||
(const struct sockaddr*)&shared->servAddr, shared->servSz);
|
||||
/* Send message to socket */
|
||||
if (sent == -1) {
|
||||
/* error encountered. Be responsible and report it in wolfSSL terms */
|
||||
|
||||
fprintf(stderr, "IO SEND ERROR: ");
|
||||
switch (errno) {
|
||||
#if EAGAIN != EWOULDBLOCK
|
||||
case EAGAIN: /* EAGAIN == EWOULDBLOCK on some systems, but not others */
|
||||
#endif
|
||||
case EWOULDBLOCK:
|
||||
fprintf(stderr, "would block\n");
|
||||
return WOLFSSL_CBIO_ERR_WANT_READ;
|
||||
case ECONNRESET:
|
||||
fprintf(stderr, "connection reset\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_RST;
|
||||
case EINTR:
|
||||
fprintf(stderr, "socket interrupted\n");
|
||||
return WOLFSSL_CBIO_ERR_ISR;
|
||||
case EPIPE:
|
||||
fprintf(stderr, "socket EPIPE\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
|
||||
default:
|
||||
fprintf(stderr, "general error\n");
|
||||
return WOLFSSL_CBIO_ERR_GENERAL;
|
||||
}
|
||||
}
|
||||
else if (sent == 0) {
|
||||
printf("Connection closed\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
printf("my_IOSend sent %d\n", sent);
|
||||
|
||||
/* successful send */
|
||||
printf("my_IOSend: sent %d bytes to %d\n", sz, shared->sd);
|
||||
return sent;
|
||||
}
|
||||
|
||||
|
||||
int main (int argc, char** argv)
|
||||
{
|
||||
/* standard variables used in a dtls client*/
|
||||
int n = 0;
|
||||
int sockfd = 0;
|
||||
int err1;
|
||||
int readErr;
|
||||
//struct sockaddr_in servAddr;
|
||||
WOLFSSL* ssl = 0;
|
||||
WOLFSSL_CTX* ctx = 0;
|
||||
char cert_array[] = "../certs/ca-cert.pem";
|
||||
char* certs = cert_array;
|
||||
char sendLine[MAXLINE];
|
||||
char recvLine[MAXLINE - 1];
|
||||
SharedDtls shared;
|
||||
|
||||
/* Program argument checking */
|
||||
if (argc != 2) {
|
||||
printf("usage: udpcli <IP address>\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
wolfSSL_Debugging_ON();
|
||||
|
||||
/* Initialize wolfSSL before assigning ctx */
|
||||
wolfSSL_Init();
|
||||
|
||||
|
||||
if ( (ctx = wolfSSL_CTX_new(wolfDTLSv1_2_client_method())) == NULL) {
|
||||
fprintf(stderr, "wolfSSL_CTX_new error.\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Register callbacks */
|
||||
wolfSSL_CTX_SetIORecv(ctx, my_IORecv);
|
||||
wolfSSL_CTX_SetIOSend(ctx, my_IOSend);
|
||||
|
||||
|
||||
/* Load certificates into ctx variable */
|
||||
if (wolfSSL_CTX_load_verify_locations(ctx, certs, 0)
|
||||
!= SSL_SUCCESS) {
|
||||
fprintf(stderr, "Error loading %s, please check the file.\n", certs);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Assign ssl variable */
|
||||
ssl = wolfSSL_new(ctx);
|
||||
if (ssl == NULL) {
|
||||
printf("unable to get ssl object");
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/* servAddr setup */
|
||||
memset(&shared.servAddr, 0, sizeof(shared.servAddr));
|
||||
shared.servAddr.sin_family = AF_INET;
|
||||
shared.servAddr.sin_port = htons(SERV_PORT);
|
||||
if (inet_pton(AF_INET, argv[1], &shared.servAddr.sin_addr) < 1) {
|
||||
printf("Error and/or invalid IP address");
|
||||
return 1;
|
||||
}
|
||||
|
||||
if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
|
||||
printf("cannot create a socket.");
|
||||
return 1;
|
||||
}
|
||||
|
||||
shared.sd = sockfd;
|
||||
shared.servSz = sizeof(shared.servAddr);
|
||||
shared.ssl = ssl;
|
||||
shared.handShakeDone = 0;
|
||||
|
||||
wolfSSL_SetIOWriteCtx(ssl, &shared);
|
||||
wolfSSL_SetIOReadCtx(ssl, &shared);
|
||||
|
||||
//wolfSSL_dtls_set_peer(ssl, &servAddr, sizeof(servAddr));
|
||||
|
||||
/* Set the file descriptor for ssl and connect with ssl variable */
|
||||
//wolfSSL_set_fd(ssl, sockfd);
|
||||
if (wolfSSL_connect(ssl) != SSL_SUCCESS) {
|
||||
err1 = wolfSSL_get_error(ssl, 0);
|
||||
printf("err = %d, %s\n", err1, wolfSSL_ERR_reason_error_string(err1));
|
||||
printf("SSL_connect failed");
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*****************************************************************************/
|
||||
/* Code for sending datagram to server */
|
||||
/* Loop until the user is finished */
|
||||
while (fgets(sendLine, MAXLINE, stdin) != NULL) {
|
||||
|
||||
/* Send sendLine to the server */
|
||||
if ( ( wolfSSL_write(ssl, sendLine, strlen(sendLine)))
|
||||
!= strlen(sendLine)) {
|
||||
printf("SSL_write failed");
|
||||
}
|
||||
|
||||
/* n is the # of bytes received */
|
||||
n = wolfSSL_read(ssl, recvLine, sizeof(recvLine)-1);
|
||||
|
||||
if (n < 0) {
|
||||
readErr = wolfSSL_get_error(ssl, 0);
|
||||
if (readErr != SSL_ERROR_WANT_READ) {
|
||||
printf("wolfSSL_read failed");
|
||||
}
|
||||
}
|
||||
|
||||
/* Add a terminating character to the generic server message */
|
||||
recvLine[n] = '\0';
|
||||
fputs(recvLine, stdout);
|
||||
}
|
||||
/* End code for sending datagram to server */
|
||||
/*****************************************************************************/
|
||||
|
||||
/* Housekeeping */
|
||||
wolfSSL_shutdown(ssl);
|
||||
wolfSSL_free(ssl);
|
||||
close(sockfd);
|
||||
wolfSSL_CTX_free(ctx);
|
||||
wolfSSL_Cleanup();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,365 @@
|
|||
/* server-dtls-callback.c
|
||||
*
|
||||
* Copyright (C) 2006-2015 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
|
||||
*
|
||||
*=============================================================================
|
||||
*
|
||||
* Bare-bones example of a DTLS server for instructional/learning purposes.
|
||||
* Utilizes DTLS 1.2.
|
||||
*/
|
||||
|
||||
#include <wolfssl/options.h>
|
||||
#include <stdio.h> /* standard in/out procedures */
|
||||
#include <stdlib.h> /* defines system calls */
|
||||
#include <string.h> /* necessary for memset */
|
||||
#include <netdb.h>
|
||||
#include <sys/socket.h> /* used for all socket calls */
|
||||
#include <netinet/in.h> /* used for sockaddr_in */
|
||||
#include <arpa/inet.h>
|
||||
#include <wolfssl/ssl.h>
|
||||
#include <errno.h>
|
||||
#include <signal.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#define SERV_PORT 11111 /* define our server port number */
|
||||
#define MSGLEN 4096
|
||||
|
||||
static int cleanup; /* To handle shutdown */
|
||||
struct sockaddr_in servAddr; /* our server's address */
|
||||
struct sockaddr_in cliaddr; /* the client's address */
|
||||
|
||||
void sig_handler(const int sig);
|
||||
|
||||
void sig_handler(const int sig)
|
||||
{
|
||||
printf("\nSIGINT %d handled\n", sig);
|
||||
cleanup = 1;
|
||||
return;
|
||||
}
|
||||
|
||||
typedef struct SharedDtls {
|
||||
WOLFSSL* ssl; /* WOLFSSL object being shared */
|
||||
int sd; /* socket fd */
|
||||
struct sockaddr_in servAddr; /* server sockaddr */
|
||||
socklen_t servSz; /* length of servAddr */
|
||||
char* recvBuf; /* I/O recv cb buffer */
|
||||
int recvSz; /* bytes in recvBuf */
|
||||
int handShakeDone; /* is the handshake done? */
|
||||
} SharedDtls;
|
||||
|
||||
|
||||
int my_IORecv(WOLFSSL* ssl, char* buff, int sz, void* ctx)
|
||||
{
|
||||
SharedDtls* shared = (SharedDtls*)ctx;
|
||||
int recvd;
|
||||
|
||||
printf("Server Recv %d\n", sz);
|
||||
|
||||
recvd = recvfrom(shared->sd, buff, sz, 0, NULL, NULL);
|
||||
if (recvd == -1) {
|
||||
/* error encountered. Be responsible and report it in wolfSSL terms */
|
||||
|
||||
fprintf(stderr, "IO RECEIVE ERROR: ");
|
||||
switch (errno) {
|
||||
#if EAGAIN != EWOULDBLOCK
|
||||
case EAGAIN: /* EAGAIN == EWOULDBLOCK on some systems, but not others */
|
||||
#endif
|
||||
case EWOULDBLOCK:
|
||||
if (!wolfSSL_dtls(ssl) || wolfSSL_get_using_nonblock(ssl)) {
|
||||
fprintf(stderr, "would block\n");
|
||||
return WOLFSSL_CBIO_ERR_WANT_READ;
|
||||
}
|
||||
else {
|
||||
fprintf(stderr, "socket timeout\n");
|
||||
return WOLFSSL_CBIO_ERR_TIMEOUT;
|
||||
}
|
||||
case ECONNRESET:
|
||||
fprintf(stderr, "connection reset\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_RST;
|
||||
case EINTR:
|
||||
fprintf(stderr, "socket interrupted\n");
|
||||
return WOLFSSL_CBIO_ERR_ISR;
|
||||
case ECONNREFUSED:
|
||||
fprintf(stderr, "connection refused\n");
|
||||
return WOLFSSL_CBIO_ERR_WANT_READ;
|
||||
case ECONNABORTED:
|
||||
fprintf(stderr, "connection aborted\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
|
||||
default:
|
||||
fprintf(stderr, "general error\n");
|
||||
return WOLFSSL_CBIO_ERR_GENERAL;
|
||||
}
|
||||
}
|
||||
else if (recvd == 0) {
|
||||
printf("Connection closed\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
|
||||
}
|
||||
|
||||
printf("Server Recvd %d\n", recvd);
|
||||
|
||||
/* successful receive */
|
||||
printf("my_IORecv: received %d bytes from %d\n", sz, shared->sd);
|
||||
return recvd;
|
||||
}
|
||||
|
||||
int my_IOSend(WOLFSSL* ssl, char* buff, int sz, void* ctx)
|
||||
{
|
||||
SharedDtls* shared = (SharedDtls*)ctx;
|
||||
int sent;
|
||||
|
||||
printf("Server Send %d\n", sz);
|
||||
|
||||
|
||||
sent = sendto(shared->sd, buff, sz, 0,
|
||||
(const struct sockaddr*)&shared->servAddr, shared->servSz);
|
||||
/* Send message to socket */
|
||||
if (sent == -1) {
|
||||
/* error encountered. Be responsible and report it in wolfSSL terms */
|
||||
|
||||
fprintf(stderr, "IO SEND ERROR: ");
|
||||
switch (errno) {
|
||||
#if EAGAIN != EWOULDBLOCK
|
||||
case EAGAIN: /* EAGAIN == EWOULDBLOCK on some systems, but not others */
|
||||
#endif
|
||||
case EWOULDBLOCK:
|
||||
fprintf(stderr, "would block\n");
|
||||
return WOLFSSL_CBIO_ERR_WANT_READ;
|
||||
case ECONNRESET:
|
||||
fprintf(stderr, "connection reset\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_RST;
|
||||
case EINTR:
|
||||
fprintf(stderr, "socket interrupted\n");
|
||||
return WOLFSSL_CBIO_ERR_ISR;
|
||||
case EPIPE:
|
||||
fprintf(stderr, "socket EPIPE\n");
|
||||
return WOLFSSL_CBIO_ERR_CONN_CLOSE;
|
||||
default:
|
||||
fprintf(stderr, "general error\n");
|
||||
return WOLFSSL_CBIO_ERR_GENERAL;
|
||||
}
|
||||
}
|
||||
else if (sent == 0) {
|
||||
printf("Connection closed\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
printf("Server Sent %d\n", sent);
|
||||
|
||||
/* successful send */
|
||||
printf("my_IOSend: sent %d bytes to %d\n", sz, shared->sd);
|
||||
return sent;
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char** argv)
|
||||
{
|
||||
/* cont short for "continue?", Loc short for "location" */
|
||||
int cont = 0;
|
||||
char caCertLoc[] = "../certs/ca-cert.pem";
|
||||
char servCertLoc[] = "../certs/server-cert.pem";
|
||||
char servKeyLoc[] = "../certs/server-key.pem";
|
||||
WOLFSSL_CTX* ctx;
|
||||
/* Variables for awaiting datagram */
|
||||
int on = 1;
|
||||
int res = 1;
|
||||
int connfd = 0;
|
||||
int recvLen = 0; /* length of message */
|
||||
WOLFSSL* ssl = NULL;
|
||||
socklen_t cliLen;
|
||||
socklen_t len = sizeof(int);
|
||||
unsigned char b[MSGLEN]; /* watch for incoming messages */
|
||||
char buff[MSGLEN]; /* the incoming message */
|
||||
char ack[] = "I hear you fashizzle!\n";
|
||||
int listenfd = 0; /* Initialize our socket */
|
||||
SharedDtls shared;
|
||||
|
||||
/* Code for handling signals */
|
||||
struct sigaction act, oact;
|
||||
act.sa_handler = sig_handler;
|
||||
sigemptyset(&act.sa_mask);
|
||||
act.sa_flags = 0;
|
||||
sigaction(SIGINT, &act, &oact);
|
||||
|
||||
/* "./config --enable-debug" and uncomment next line for debugging */
|
||||
wolfSSL_Debugging_ON();
|
||||
|
||||
/* Initialize wolfSSL */
|
||||
wolfSSL_Init();
|
||||
|
||||
/* Set ctx to DTLS 1.2 */
|
||||
if ((ctx = wolfSSL_CTX_new(wolfDTLSv1_2_server_method())) == NULL) {
|
||||
printf("wolfSSL_CTX_new error.\n");
|
||||
return 1;
|
||||
}
|
||||
/* Load CA certificates */
|
||||
if (wolfSSL_CTX_load_verify_locations(ctx,caCertLoc,0) !=
|
||||
SSL_SUCCESS) {
|
||||
printf("Error loading %s, please check the file.\n", caCertLoc);
|
||||
return 1;
|
||||
}
|
||||
/* Load server certificates */
|
||||
if (wolfSSL_CTX_use_certificate_file(ctx, servCertLoc, SSL_FILETYPE_PEM) !=
|
||||
SSL_SUCCESS) {
|
||||
printf("Error loading %s, please check the file.\n", servCertLoc);
|
||||
return 1;
|
||||
}
|
||||
/* Load server Keys */
|
||||
if (wolfSSL_CTX_use_PrivateKey_file(ctx, servKeyLoc,
|
||||
SSL_FILETYPE_PEM) != SSL_SUCCESS) {
|
||||
printf("Error loading %s, please check the file.\n", servKeyLoc);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Register callbacks */
|
||||
wolfSSL_CTX_SetIORecv(ctx, my_IORecv);
|
||||
wolfSSL_CTX_SetIOSend(ctx, my_IOSend);
|
||||
|
||||
|
||||
/* Await Datagram */
|
||||
while (cleanup != 1) {
|
||||
|
||||
/* Create a UDP/IP socket */
|
||||
if ((listenfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
|
||||
printf("Cannot create socket.\n");
|
||||
cleanup = 1;
|
||||
}
|
||||
printf("Socket allocated\n");
|
||||
|
||||
/* clear servAddr each loop */
|
||||
memset((char *)&servAddr, 0, sizeof(servAddr));
|
||||
|
||||
/* host-to-network-long conversion (htonl) */
|
||||
/* host-to-network-short conversion (htons) */
|
||||
servAddr.sin_family = AF_INET;
|
||||
servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
|
||||
servAddr.sin_port = htons(SERV_PORT);
|
||||
|
||||
/* Eliminate socket already in use error */
|
||||
res = setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, &on, len);
|
||||
if (res < 0) {
|
||||
printf("Setsockopt SO_REUSEADDR failed.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
|
||||
/*Bind Socket*/
|
||||
if (bind(listenfd, (struct sockaddr*)&servAddr, sizeof(servAddr)) < 0) {
|
||||
printf("Bind failed.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
|
||||
printf("Awaiting client connection on port %d\n", SERV_PORT);
|
||||
|
||||
cliLen = sizeof(cliaddr);
|
||||
connfd = (int)recvfrom(listenfd, (char *)&b, sizeof(b), MSG_PEEK,
|
||||
(struct sockaddr*)&shared.servAddr, &cliLen);
|
||||
|
||||
if (connfd < 0) {
|
||||
printf("No clients in que, enter idle state\n");
|
||||
continue;
|
||||
}
|
||||
else if (connfd > 0) {
|
||||
if (connect(listenfd, (const struct sockaddr *)&shared.servAddr,
|
||||
sizeof(shared.servAddr)) != 0) {
|
||||
printf("Udp connect failed.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
}
|
||||
else {
|
||||
printf("Recvfrom failed.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
printf("Connected!\n");
|
||||
|
||||
/* Create the WOLFSSL Object */
|
||||
if ((ssl = wolfSSL_new(ctx)) == NULL) {
|
||||
printf("wolfSSL_new error.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
|
||||
shared.sd = listenfd;
|
||||
shared.servSz = sizeof(shared.servAddr);
|
||||
shared.ssl = ssl;
|
||||
shared.handShakeDone = 0;
|
||||
|
||||
wolfSSL_SetIOWriteCtx(ssl, &shared);
|
||||
wolfSSL_SetIOReadCtx(ssl, &shared);
|
||||
|
||||
/* set the session ssl to client connection port */
|
||||
//wolfSSL_set_fd(ssl, listenfd);
|
||||
|
||||
if (wolfSSL_accept(ssl) != SSL_SUCCESS) {
|
||||
|
||||
int e = wolfSSL_get_error(ssl, 0);
|
||||
|
||||
printf("error = %d, %s\n", e, wolfSSL_ERR_reason_error_string(e));
|
||||
printf("SSL_accept failed.\n");
|
||||
continue;
|
||||
}
|
||||
if ((recvLen = wolfSSL_read(ssl, buff, sizeof(buff)-1)) > 0) {
|
||||
printf("heard %d bytes\n", recvLen);
|
||||
|
||||
buff[recvLen] = 0;
|
||||
printf("I heard this: \"%s\"\n", buff);
|
||||
}
|
||||
else if (recvLen < 0) {
|
||||
int readErr = wolfSSL_get_error(ssl, 0);
|
||||
if(readErr != SSL_ERROR_WANT_READ) {
|
||||
printf("SSL_read failed.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
}
|
||||
if (wolfSSL_write(ssl, ack, sizeof(ack)) < 0) {
|
||||
printf("wolfSSL_write fail.\n");
|
||||
cleanup = 1;
|
||||
cont = 1;
|
||||
}
|
||||
else {
|
||||
printf("Sending reply.\n");
|
||||
}
|
||||
|
||||
printf("reply sent \"%s\"\n", ack);
|
||||
|
||||
wolfSSL_set_fd(ssl, 0);
|
||||
wolfSSL_shutdown(ssl);
|
||||
wolfSSL_free(ssl);
|
||||
|
||||
printf("Client left cont to idle state\n");
|
||||
cont = 0;
|
||||
}
|
||||
|
||||
/* With the "continue" keywords, it is possible for the loop to exit *
|
||||
* without changing the value of cont */
|
||||
if (cleanup == 1) {
|
||||
cont = 1;
|
||||
}
|
||||
|
||||
if (cont == 1) {
|
||||
wolfSSL_CTX_free(ctx);
|
||||
wolfSSL_Cleanup();
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue