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tcpEchoSSH.c
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tcpEchoSSH.c
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/*
* Copyright (c) 2014-2015, Texas Instruments Incorporated
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* * Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* ======== tcpEchoTLS.c ========
*/
#include <string.h>
#include <xdc/std.h>
#include <xdc/cfg/global.h>
#include <xdc/runtime/Error.h>
#include <xdc/runtime/System.h>
#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/drivers/GPIO.h>
/* NDK BSD support */
#include <sys/socket.h>
#include <arpa/inet.h>
/* Example/Board Header file */
#include "Board.h"
#include "servers/ssh/sshd.h"
#define TCPWORKERSTACKSIZE 14592
//#define TCPWORKERSTACKSIZE 20000
#define NUMTCPWORKERS 1
/****************************************************************************/
/* Tasks functions */
/****************************************************************************/
/**
* @brief Toggle the Board_LED0
* @param <i>arg0</i> Determines the sleep period of the task
* @param <i>arg1</i> unused
* @return Void
*/
Void heartBeatFxn(UArg arg0, UArg arg1)
{
while (1) {
Task_sleep((UInt)arg0);
GPIO_toggle(Board_LED0);
GPIO_toggle(Board_LED1);
}
}
/*
* ======== exitApp ========
* Cleans up the SSH context and exits the application
*/
Void exitApp(SSH_CTX *ctx)
{
if (ctx)
SSH_CTX_free(ctx);
//BIOS_exit(-1);
}
/*
* ======== tcpWorker ========
* Task to handle TCP connection. Can be multiple Tasks running
* this function.
*/
Void tcpWorker(UArg arg0, UArg arg1)
{
int rc;
int clientfd = 0;
SSH *ssh = (SSH *)arg0;
clientfd = SSH_get_fd(ssh);
System_printf("tcpWorker: start clientfd = 0x%x\n", clientfd);
/* Init structs */
transportInit(ssh);
/* Signal active session */
ssh->ctx->actSe = 1;
/* Version exchange */
rc = transportVersion_hd(ssh);
if (rc < 0 )
goto ABORT;
if (rc == 1)
goto PROCESS;
/* Main loop */
for (;;) {
/* Read plain/encrypt packet from client */
rc = transportGetPacket(ssh);
if (rc < 0)
break;
PROCESS:
rc = transportExtract(ssh);
if (rc < 0)
break;
/* Process the reply packet */
rc = transportProcessPacket(ssh);
if (rc != 0)
break;
//System_flush();
}
ABORT:
System_printf("tcpWorker stop clientfd = 0x%x\n", clientfd);
System_flush();
if (ssh)
SSH_free(ssh);
close(clientfd);
}
/*
* ======== tcpHandler ========
* Creates new Task to handle new TCP connections.
*/
Void dtask_tcp_echo(UArg arg0, UArg arg1)
{
int status;
int clientfd;
int server;
struct sockaddr_in localAddr;
struct sockaddr_in clientAddr;
int optval;
int optlen = sizeof(optval);
socklen_t addrlen = sizeof(clientAddr);
Task_Handle taskHandle;
Task_Params taskParams;
Error_Block eb;
SSH_CTX *ctx;
SSH *ssh;
/* Allocate memory */
ctx = SSH_CTX_new();
/* Load DSA Keys in ctx */
if (SSH_CTX_load_keys(ctx) < 0) {
System_printf("Error: keys load failed.\n");
goto ABORT;
}
server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (server == -1) {
System_printf("Error: socket not created.\n");
goto ABORT;
}
memset(&localAddr, 0, sizeof(localAddr));
localAddr.sin_family = AF_INET;
localAddr.sin_addr.s_addr = htonl(INADDR_ANY);
localAddr.sin_port = htons(arg0);
status = bind(server, (struct sockaddr *)&localAddr, sizeof(localAddr));
if (status == -1) {
System_printf("Error: bind failed.\n");
goto ABORT;
}
status = listen(server, NUMTCPWORKERS);
if (status == -1) {
System_printf("Error: listen failed.\n");
goto ABORT;
}
optval = 1;
if (setsockopt(server, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen) < 0) {
System_printf("Error: setsockopt failed\n");
goto ABORT;
}
/* TCP no push */
if (setsockopt(server, IPPROTO_TCP, TCP_NOPUSH, &optval, optlen ) < 0) {
System_printf("Error: setsockopt failed\n");
goto ABORT;
}
while ((clientfd =
accept(server, (struct sockaddr *)&clientAddr, &addrlen)) != -1) {
/* Only 1 active session */
if (ctx->actSe > 0) {
close(clientfd);
continue;
}
ctx->actSe = 1;
/* Init the Error_Block */
Error_init(&eb);
ssh = SSH_new(ctx);
if (ssh == NULL) {
System_printf("Error: SSH_new failed.\n");
close(clientfd);
continue;
}
SSH_set_fd(ssh, clientfd);
/* Initialize the defaults and set the parameters. */
Task_Params_init(&taskParams);
taskParams.arg0 = (UArg)ssh;
taskParams.stackSize = TCPWORKERSTACKSIZE;
taskHandle = Task_create((Task_FuncPtr)tcpWorker, &taskParams, &eb);
if (taskHandle == NULL) {
System_printf("Error: Failed to create new Task\n");
close(clientfd);
}
/* addrlen is a value-result param, must reset for next accept call */
addrlen = sizeof(clientAddr);
/* get client ip address */
struct sockaddr_in *s = (struct sockaddr_in *)&clientAddr;
inet_ntop(AF_INET, &s->sin_addr, ssh->in_addr, sizeof(ssh->in_addr));
System_flush();
}
System_printf("Error: accept failed.\n");
System_flush();
ABORT:
if (server > 0) {
close(server);
}
exitApp(ctx);
}
/*
* ======== main ========
*/
int main(void)
{
/* Call board init functions */
Board_initGeneral();
Board_initGPIO();
Board_initEMAC();
/* CyaSSL library needs time() for validating certificates. */
//MYTIME_init();
//MYTIME_settime(CURRENTTIME);
System_printf("Starting the SSH/TCP Echo example\nSystem provider is set "
"to SysMin. Halt the target to view any SysMin contents in"
" ROV.\n");
/* SysMin will only print to the console when you call flush or exit */
System_flush();
/* Start BIOS */
BIOS_start();
return (0);
}