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/*
* mgmt-cli.c
* ---------
* Management CLI code.
*
* Copyright (c) 2016, NORDUnet A/S 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 the NORDUnet 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
* HOLDER 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.
*/
#include <string.h>
#include "stm-init.h"
#include "stm-uart.h"
#include "stm-led.h"
#include "mgmt-cli.h"
#include "mgmt-dfu.h"
#include "mgmt-fpga.h"
#include "mgmt-misc.h"
#include "mgmt-show.h"
#include "mgmt-keystore.h"
#include "mgmt-masterkey.h"
/* MGMT UART interrupt receive buffer (data will be put in a larger ring buffer) */
volatile uint8_t uart_rx;
#ifndef CLI_UART_RECVBUF_SIZE
#define CLI_UART_RECVBUF_SIZE 256 /* This must be a power of 2 */
#endif
#define CLI_UART_RECVBUF_MASK (CLI_UART_RECVBUF_SIZE - 1)
typedef struct {
uint32_t enabled, ridx;
mgmt_cli_dma_state_t rx_state;
uint8_t buf[CLI_UART_RECVBUF_SIZE];
} uart_ringbuf_t;
volatile uart_ringbuf_t uart_ringbuf = {1, 0, DMA_RX_STOP, {0}};
#define RINGBUF_RIDX(rb) (rb.ridx & CLI_UART_RECVBUF_MASK)
#define RINGBUF_WIDX(rb) (sizeof(rb.buf) - __HAL_DMA_GET_COUNTER(huart_mgmt.hdmarx))
#define RINGBUF_COUNT(rb) ((unsigned)(RINGBUF_WIDX(rb) - RINGBUF_RIDX(rb)))
#define RINGBUF_READ(rb, dst) {dst = rb.buf[RINGBUF_RIDX(rb)]; rb.buf[RINGBUF_RIDX(rb)] = '.'; rb.ridx++;}
static void uart_cli_print(struct cli_def *cli __attribute__ ((unused)), const char *buf)
{
char crlf[] = "\r\n";
uart_send_string2(STM_UART_MGMT, buf);
uart_send_string2(STM_UART_MGMT, crlf);
}
static int uart_cli_read(struct cli_def *cli __attribute__ ((unused)), void *buf, size_t count)
{
uint32_t timeout = 0xffffff;
while (count && timeout) {
if (RINGBUF_COUNT(uart_ringbuf)) {
RINGBUF_READ(uart_ringbuf, *(uint8_t *) buf);
buf++;
count--;
}
timeout--;
}
if (! timeout) return 0;
return 1;
}
static int uart_cli_write(struct cli_def *cli __attribute__ ((unused)), const void *buf, size_t count)
{
uart_send_bytes(STM_UART_MGMT, (uint8_t *) buf, count);
return (int) count;
}
int control_mgmt_uart_dma_rx(mgmt_cli_dma_state_t state)
{
if (state == DMA_RX_START) {
if (uart_ringbuf.rx_state != DMA_RX_START) {
memset((void *) uart_ringbuf.buf, 0, sizeof(uart_ringbuf.buf));
/* Start receiving data from the UART using DMA */
HAL_UART_Receive_DMA(&huart_mgmt, (uint8_t *) uart_ringbuf.buf, sizeof(uart_ringbuf.buf));
uart_ringbuf.ridx = 0;
uart_ringbuf.rx_state = DMA_RX_START;
}
return 1;
} else if (state == DMA_RX_STOP) {
if (HAL_UART_DMAStop(&huart_mgmt) != HAL_OK) return 0;
uart_ringbuf.rx_state = DMA_RX_STOP;
return 1;
}
return 0;
}
static int embedded_cli_loop(struct cli_def *cli)
{
unsigned char c;
int n = 0;
static struct cli_loop_ctx ctx;
memset(&ctx, 0, sizeof(ctx));
ctx.insertmode = 1;
cli->state = CLI_STATE_LOGIN;
/* start off in unprivileged mode */
cli_set_privilege(cli, PRIVILEGE_UNPRIVILEGED);
cli_set_configmode(cli, MODE_EXEC, NULL);
cli_error(cli, "%s", cli->banner);
while (1) {
cli_loop_start_new_command(cli, &ctx);
control_mgmt_uart_dma_rx(DMA_RX_START);
while (1) {
cli_loop_show_prompt(cli, &ctx);
n = cli_loop_read_next_char(cli, &ctx, &c);
/*
cli_print(cli, "Next char: '%c'/%i, ringbuf ridx %i, widx %i",
c, (int) c,
uart_ringbuf.ridx,
RINGBUF_WIDX(uart_ringbuf)
*/
if (n == CLI_LOOP_CTRL_BREAK)
break;
if (n == CLI_LOOP_CTRL_CONTINUE)
continue;
n = cli_loop_process_char(cli, &ctx, c);
if (n == CLI_LOOP_CTRL_BREAK)
break;
if (n == CLI_LOOP_CTRL_CONTINUE)
continue;
}
if (ctx.l < 0)
continue;
/* cli_print(cli, "Process command: '%s'", ctx.cmd); */
n = cli_loop_process_cmd(cli, &ctx);
if (n == CLI_LOOP_CTRL_BREAK)
break;
}
return CLI_OK;
}
static void mgmt_cli_init(struct cli_def *cli)
{
cli_init(cli);
cli_read_callback(cli, uart_cli_read);
cli_write_callback(cli, uart_cli_write);
cli_print_callback(cli, uart_cli_print);
cli_set_banner(cli, "Cryptech Alpha");
cli_set_hostname(cli, "cryptech");
cli_telnet_protocol(cli, 0);
}
static int check_auth(const char *username, const char *password)
{
if (strcasecmp(username, "ct") != 0)
return CLI_ERROR;
if (strcasecmp(password, "ct") != 0)
return CLI_ERROR;
return CLI_OK;
}
int cli_main(void)
{
static struct cli_def cli;
mgmt_cli_init(&cli);
cli_set_auth_callback(&cli, check_auth);
configure_cli_show(&cli);
configure_cli_fpga(&cli);
configure_cli_misc(&cli);
configure_cli_dfu(&cli);
configure_cli_keystore(&cli);
configure_cli_masterkey(&cli);
while (1) {
embedded_cli_loop(&cli);
/* embedded_cli_loop returns when the user enters 'quit' or 'exit' */
cli_print(&cli, "\nLogging out...\n");
}
/*NOTREACHED*/
return -1;
}
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