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/**
* NXT interface; commands code.
*
* Copyright 2025 Nicolas Schodet
*
* This program 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.
*
* This program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "cmd.h"
#include "lowlevel.h"
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
static nxt_error_t
parse_reply(uint8_t **p, nxt_cmd_opcode_t opcode)
{
if (**p != NXT_CMD_TYPE_REPLY)
return NXT_ERROR_PROTO;
(*p)++;
if (**p != opcode)
return NXT_ERROR_PROTO;
(*p)++;
if (**p != NXT_CMD_STATUS_NO_ERR)
return NXT_ERROR_CMD(**p);
(*p)++;
return NXT_OK;
}
static nxt_error_t
parse_string(uint8_t **p, char *s, size_t size)
{
uint8_t *pp;
pp = *p;
*p += size;
for (; pp != *p; pp++)
{
*s++ = *pp;
if (!*pp)
return NXT_OK;
if (!isprint(*pp))
return NXT_ERROR_PROTO;
}
return NXT_ERROR_PROTO;
}
static nxt_error_t
parse_serial(uint8_t **p, char *s, size_t s_size)
{
int ret = snprintf(s, s_size, "%02x:%02x:%02x:%02x:%02x:%02x", (*p)[0],
(*p)[1], (*p)[2], (*p)[3], (*p)[4], (*p)[5]);
assert(ret < (int)s_size);
// Last one is always 0.
*p += 7;
return NXT_OK;
}
const char *
nxt_cmd_str_error(nxt_cmd_status_t status)
{
switch (status)
{
case NXT_CMD_STATUS_NO_ERR:
return "Command status: no error";
case NXT_CMD_STATUS_STAT_COMM_PENDING:
return "Command status: pending setup operation in progress";
case NXT_CMD_STATUS_STAT_MSG_EMPTY_MAILBOX:
return "Command status: specified mailbox contains no new messages";
case NXT_CMD_STATUS_NOMOREHANDLES:
return "Command status: no more handles";
case NXT_CMD_STATUS_NOSPACE:
return "Command status: no space";
case NXT_CMD_STATUS_NOMOREFILES:
return "Command status: no more files";
case NXT_CMD_STATUS_EOFEXSPECTED:
return "Command status: end of file expected";
case NXT_CMD_STATUS_ENDOFFILE:
return "Command status: end of file";
case NXT_CMD_STATUS_NOTLINEARFILE:
return "Command status: not a linear file";
case NXT_CMD_STATUS_FILENOTFOUND:
return "Command status: file not found";
case NXT_CMD_STATUS_HANDLEALREADYCLOSED:
return "Command status: handle already closed";
case NXT_CMD_STATUS_NOLINEARSPACE:
return "Command status: no linear space available";
case NXT_CMD_STATUS_UNDEFINEDERROR:
return "Command status: undefined error";
case NXT_CMD_STATUS_FILEISBUSY:
return "Command status: file is busy";
case NXT_CMD_STATUS_NOWRITEBUFFERS:
return "Command status: no write buffers";
case NXT_CMD_STATUS_APPENDNOTPOSSIBLE:
return "Command status: append not possible";
case NXT_CMD_STATUS_FILEISFULL:
return "Command status: file is full";
case NXT_CMD_STATUS_FILEEXISTS:
return "Command status: file exists";
case NXT_CMD_STATUS_MODULENOTFOUND:
return "Command status: module not found";
case NXT_CMD_STATUS_OUTOFBOUNDERY:
return "Command status: out of boundary";
case NXT_CMD_STATUS_ILLEGALFILENAME:
return "Command status: illegal file name";
case NXT_CMD_STATUS_ILLEGALHANDLE:
return "Command status: illegal handle";
case NXT_CMD_STATUS_ERR_RC_FAILED:
return "Command status: request failed (i.e. specified file not found)";
case NXT_CMD_STATUS_ERR_RC_UNKNOWN_CMD:
return "Command status: unknown command opcode";
case NXT_CMD_STATUS_ERR_RC_BAD_PACKET:
return "Command status: clearly insane packet";
case NXT_CMD_STATUS_ERR_RC_ILLEGAL_VAL:
return "Command status: data contains out-of-range values";
case NXT_CMD_STATUS_ERR_COMM_BUS_ERR:
return "Command status: something went wrong on the communications bus";
case NXT_CMD_STATUS_ERR_COMM_BUFFER_FULL:
return "Command status: no room in comm buffer";
case NXT_CMD_STATUS_ERR_COMM_CHAN_INVALID:
return "Command status: specified channel/connection is not valid";
case NXT_CMD_STATUS_ERR_COMM_CHAN_NOT_READY:
return "Command status: specified channel/connection not configured or "
"busy";
case NXT_CMD_STATUS_ERR_NO_PROG:
return "Command status: no active program";
case NXT_CMD_STATUS_ERR_INVALID_SIZE:
return "Command status: illegal size specified";
case NXT_CMD_STATUS_ERR_INVALID_QUEUE:
return "Command status: illegal queue ID specified";
case NXT_CMD_STATUS_ERR_INVALID_FIELD:
return "Command status: attempted to access invalid field of a structure";
case NXT_CMD_STATUS_ERR_INVALID_PORT:
return "Command status: bad input or output port specified";
case NXT_CMD_STATUS_ERR_MEM:
return "Command status: insufficient memory available";
case NXT_CMD_STATUS_ERR_ARG:
return "Command status: bad arguments";
default:
return "Command status: unknown error";
}
}
nxt_error_t
nxt_cmd_boot(nxt_t *nxt, bool sure)
{
static const uint8_t cmd[] = {
NXT_CMD_TYPE_SYSTEM, NXT_CMD_OPCODE_SYSTEM_BOOTCMD,
// clang-format off
'L', 'e', 't', '\'', 's', ' ', 'd', 'a', 'n', 'c', 'e', ':', ' ',
'S', 'A', 'M', 'B', 'A', '\0',
// clang-format on
};
uint8_t rsp[3 + sizeof("Yes")], *p;
assert(sure);
NXT_ERR(nxt_send_buf(nxt, cmd, sizeof(cmd)));
NXT_ERR(nxt_recv_buf(nxt, rsp, sizeof(rsp)));
p = rsp;
NXT_ERR(parse_reply(&p, NXT_CMD_OPCODE_SYSTEM_BOOTCMD));
return NXT_OK;
}
nxt_error_t
nxt_cmd_get_device_info(nxt_t *nxt, nxt_device_info_t *device_info)
{
static const uint8_t cmd[] = { NXT_CMD_TYPE_SYSTEM,
NXT_CMD_OPCODE_SYSTEM_DEVICEINFO };
uint8_t rsp[3 + NXT_NAME_SIZE + 7 + 4 + 4], *p;
NXT_ERR(nxt_send_buf(nxt, cmd, sizeof(cmd)));
NXT_ERR(nxt_recv_buf(nxt, rsp, sizeof(rsp)));
p = rsp;
NXT_ERR(parse_reply(&p, NXT_CMD_OPCODE_SYSTEM_DEVICEINFO));
NXT_ERR(parse_string(&p, device_info->name, sizeof(device_info->name)));
NXT_ERR(parse_serial(&p, device_info->serial, sizeof(device_info->serial)));
device_info->signal_strengths[0] = *p++;
device_info->signal_strengths[1] = *p++;
device_info->signal_strengths[2] = *p++;
device_info->signal_strengths[3] = *p++;
device_info->user_flash = p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24;
p += 4;
assert(p == rsp + sizeof(rsp));
return NXT_OK;
}
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