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nuttx-apps/wireless/ieee802154/i8sak/i8sak_main.c

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/****************************************************************************
* apps/wireless/ieee802154/i8sak/i8sak_main.c
* IEEE 802.15.4 Swiss Army Knife
*
* Copyright (C) 2014-2015, 2017 Gregory Nutt. All rights reserved.
* Copyright (C) 2014-2015 Sebastien Lorquet. All rights reserved.
* Copyright (C) 2017 Verge Inc. All rights reserved.
*
* Author: Sebastien Lorquet <sebastien@lorquet.fr>
* Author: Anthony Merlino <anthony@vergeaero.com>
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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.
*
****************************************************************************/
/****************************************************************************
* This app can be used to control an IEEE 802.15.4 device from command line.
* Example valid ieee802154 packets:
*
* Beacon request, seq number 01:
* xx xx 01
*
* Simple data packet
* from long address xx to long address yy, pan id pp for src and dest
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
#include <fcntl.h>
#include <queue.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <nuttx/fs/ioctl.h>
#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
#include <nuttx/wireless/ieee802154/ieee802154_device.h>
#include "wireless/ieee802154.h"
#include "i8sak.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#if !defined(CONFIG_IEEE802154_I8SAK_NINSTANCES) || CONFIG_IEEE802154_I8SAK_NINSTANCES <= 0
# undef CONFIG_IEEE802154_I8SAK_NINSTANCES
# define CONFIG_IEEE802154_I8SAK_NINSTANCES 3
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/* Describes one command */
struct i8sak_command_s
{
FAR const char *name;
CODE void (*handler)(FAR struct i8sak_s *i8sak, int argc, FAR char *argv[]);
};
/****************************************************************************
* Private Data
****************************************************************************/
/* Alphabetical, except for help */
static const struct i8sak_command_s g_i8sak_commands[] =
{
{"help", (CODE void *)NULL},
{"acceptassoc", (CODE void *)i8sak_acceptassoc_cmd},
{"assoc", (CODE void *)i8sak_assoc_cmd},
{"blaster", (CODE void *)i8sak_blaster_cmd},
{"get", (CODE void *)i8sak_get_cmd},
{"poll", (CODE void *)i8sak_poll_cmd},
{"regdump", (CODE void *)i8sak_regdump_cmd},
{"reset", (CODE void *)i8sak_reset_cmd},
{"scan", (CODE void *)i8sak_scan_cmd},
{"set", (CODE void *)i8sak_set_cmd},
{"sniffer", (CODE void *)i8sak_sniffer_cmd},
{"startpan", (CODE void *)i8sak_startpan_cmd},
{"tx", (CODE void *)i8sak_tx_cmd},
};
#define NCOMMANDS (sizeof(g_i8sak_commands) / sizeof(struct i8sak_command_s))
static sq_queue_t g_i8sak_free;
static sq_queue_t g_i8sak_instances;
static struct i8sak_s g_i8sak_pool[CONFIG_IEEE802154_I8SAK_NINSTANCES];
static bool g_i8sak_initialized = false;
static bool g_activei8sak_set = false;
static FAR struct i8sak_s *g_activei8sak;
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int i8sak_setup(FAR struct i8sak_s *i8sak, FAR const char *ifname);
static int i8sak_daemon(int argc, FAR char *argv[]);
static int i8sak_showusage(FAR const char *progname, int exitcode);
static void i8sak_switch_instance(FAR char *ifname);
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name : i8sak_requestdaemon
*
* Description :
*
****************************************************************************/
int i8sak_requestdaemon(FAR struct i8sak_s *i8sak)
{
char daemonname[I8SAK_MAX_DAEMONNAME];
int ret;
int len;
ret = sem_wait(&i8sak->daemonlock);
if (ret < 0)
{
DEBUGASSERT(ret == EINTR);
return ret;
}
if (++i8sak->daemonusers == 1)
{
/* Create strings for task based on device. i.e. i8_ieee0 */
if (i8sak->mode == I8SAK_MODE_CHAR)
{
len = strlen(i8sak->ifname);
snprintf(daemonname, I8SAK_DAEMONNAME_PREFIX_LEN + (len - 5),
I8SAK_DAEMONNAME_FMT, &i8sak->ifname[5]);
}
#ifdef CONFIG_NET_6LOWPAN
else if (i8sak->mode == I8SAK_MODE_NETIF)
{
len = strlen(i8sak->ifname);
snprintf(daemonname, I8SAK_DAEMONNAME_PREFIX_LEN + len,
I8SAK_DAEMONNAME_FMT, i8sak->ifname);
}
#endif
i8sak->daemon_shutdown = false;
i8sak->daemon_pid = task_create(daemonname, CONFIG_IEEE802154_I8SAK_PRIORITY,
CONFIG_IEEE802154_I8SAK_STACKSIZE, i8sak_daemon,
NULL);
if (i8sak->daemon_pid < 0)
{
fprintf(stderr, "failed to start daemon\n");
sem_post(&i8sak->daemonlock);
return ERROR;
}
/* Use the signal semaphore to wait for daemon to start before returning */
ret = sem_wait(&i8sak->sigsem);
if (ret < 0)
{
fprintf(stderr, "i8sak:interrupted while daemon starting\n");
sem_post(&i8sak->daemonlock);
return ret;
}
}
sem_post(&i8sak->daemonlock);
return 0;
}
/****************************************************************************
* Name : i8sak_releasedaemon
*
* Description :
*
****************************************************************************/
int i8sak_releasedaemon(FAR struct i8sak_s *i8sak)
{
int ret;
ret = sem_wait(&i8sak->daemonlock);
if (ret < 0)
{
DEBUGASSERT(ret == EINTR);
return ret;
}
/* If this was the last user, signal the daemon to shutdown */
if (--i8sak->daemonusers == 0)
{
i8sak->daemon_shutdown = true;
sem_post(&i8sak->updatesem);
}
sem_post(&i8sak->daemonlock);
return 0;
}
/****************************************************************************
* Name : i8sak_str2payload
*
* Description :
* Parse string to get buffer of data. Buf is expected to be of size
* IEEE802154_MAX_MAC_PAYLOAD_SIZE or larger.
*
* Returns:
* Positive length value of frame payload
****************************************************************************/
int i8sak_str2payload(FAR const char *str, FAR uint8_t *buf)
{
int str_len;
int ret;
int i = 0;
str_len = strlen(str);
/* Each byte is represented by 2 chars */
ret = str_len >> 1;
/* Check if the number of chars is a multiple of 2 and that the number of
* bytes does not exceed the max MAC frame payload supported.
*/
if ((str_len & 1) || (ret > IEEE802154_MAX_MAC_PAYLOAD_SIZE))
{
fprintf(stderr, "ERROR: Invalid payload\n");
exit(EXIT_FAILURE);
}
/* Decode hex packet */
while (str_len > 0)
{
int dat;
if (sscanf(str, "%2x", &dat) == 1)
{
buf[i++] = dat;
str += 2;
str_len -= 2;
}
else
{
fprintf(stderr, "ERROR: Invalid payload\n");
exit(EXIT_FAILURE);
}
}
return ret;
}
/****************************************************************************
* Name: i8sak_str2long
*
* Description:
* Convert a hex string to an integer value
*
****************************************************************************/
long i8sak_str2long(FAR const char *str)
{
FAR char *endptr;
long value;
value = strtol(str, &endptr, 0);
if (*endptr != '\0')
{
fprintf(stderr, "ERROR: Garbage after numeric argument\n");
exit(EXIT_FAILURE);
}
if (value > INT_MAX || value < INT_MIN)
{
fprintf(stderr, "ERROR: Integer value out of range\n");
return LONG_MAX;
exit(EXIT_FAILURE);
}
return value;
}
/****************************************************************************
* Name: i8sak_str2luint8
*
* Description:
* Convert a string to an integer value
*
****************************************************************************/
uint8_t i8sak_str2luint8(FAR const char *str)
{
long value = i8sak_str2long(str);
if (value < 0 || value > UINT8_MAX)
{
fprintf(stderr, "ERROR: 8-bit value out of range\n");
exit(EXIT_FAILURE);
}
return (uint8_t)value;
}
/****************************************************************************
* Name: i8sak_str2luint16
*
* Description:
* Convert a string to an integer value
*
****************************************************************************/
uint16_t i8sak_str2luint16(FAR const char *str)
{
long value = i8sak_str2long(str);
if (value < 0 || value > UINT16_MAX)
{
fprintf(stderr, "ERROR: 16-bit value out of range\n");
exit(EXIT_FAILURE);
}
return (uint16_t)value;
}
/****************************************************************************
* Name: i8sak_char2nibble
*
* Description:
* Convert an hexadecimal character to a 4-bit nibble.
*
****************************************************************************/
uint8_t i8sak_char2nibble(char ch)
{
if (ch >= '0' && ch <= '9')
{
return ch - '0';
}
else if (ch >= 'a' && ch <= 'f')
{
return ch - 'a' + 10;
}
else if (ch >= 'A' && ch <= 'F')
{
return ch - 'A' + 10;
}
else if (ch == '\0')
{
fprintf(stderr, "ERROR: Unexpected end hex\n");
exit(EXIT_FAILURE);
}
else
{
fprintf(stderr, "ERROR: Unexpected character in hex value: %02x\n", ch);
exit(EXIT_FAILURE);
}
}
/****************************************************************************
* Name: i8sak_str2eaddr
*
* Description:
* Convert a string 8-byte EADDR array.
*
****************************************************************************/
void i8sak_str2eaddr(FAR const char *str, FAR uint8_t *eaddr)
{
FAR const char *src = str;
uint8_t bvalue;
char ch;
int i;
for (i = 0; i < 8; i++)
{
ch = (char)*src++;
bvalue = i8sak_char2nibble(ch) << 4;
ch = (char)*src++;
bvalue |= i8sak_char2nibble(ch);
*eaddr++ = bvalue;
if (i < 7)
{
ch = (char)*src++;
if (ch != ':')
{
fprintf(stderr, "ERROR: Missing colon separator: %s\n", str);
fprintf(stderr, " Expected xx:xx:xx:xx:xx:xx:xx:xx\n");
exit(EXIT_FAILURE);
}
}
}
}
/****************************************************************************
* Name: i8sak_str2saddr
*
* Description:
* Convert a string 2-byte SADDR array.
*
****************************************************************************/
void i8sak_str2saddr(FAR const char *str, FAR uint8_t *saddr)
{
FAR const char *src = str;
uint8_t bvalue;
char ch;
int i;
for (i = 0; i < 2; i++)
{
ch = (char)*src++;
bvalue = i8sak_char2nibble(ch) << 4;
ch = (char)*src++;
bvalue |= i8sak_char2nibble(ch);
*saddr++ = bvalue;
if (i < 1)
{
ch = (char)*src++;
if (ch != ':')
{
fprintf(stderr, "ERROR: Missing colon separator: %s\n", str);
fprintf(stderr, " Expected xx:xx\n");
exit(EXIT_FAILURE);
}
}
}
}
/****************************************************************************
* Name: i8sak_str2panid
*
* Description:
* Convert a string 2-byte PAN ID array.
*
****************************************************************************/
void i8sak_str2panid(FAR const char *str, FAR uint8_t *panid)
{
FAR const char *src = str;
uint8_t bvalue;
char ch;
int i;
for (i = 0; i < 2; i++)
{
ch = (char)*src++;
bvalue = i8sak_char2nibble(ch) << 4;
ch = (char)*src++;
bvalue |= i8sak_char2nibble(ch);
*panid++ = bvalue;
if (i < 1)
{
ch = (char)*src++;
if (ch != ':')
{
fprintf(stderr, "ERROR: Missing colon separator: %s\n", str);
fprintf(stderr, " Expected xx:xx\n");
exit(EXIT_FAILURE);
}
}
}
}
/****************************************************************************
* Name: i8sak_str2bool
*
* Description:
* Convert a boolean name to a boolean value.
*
****************************************************************************/
bool i8sak_str2bool(FAR const char *str)
{
if (strcasecmp(str, "true") == 0)
{
return true;
}
else if (strcasecmp(str, "false") == 0)
{
return false;
}
else
{
fprintf(stderr, "ERROR: Invalid boolean name: %s\n", str);
fprintf(stderr, " Expected true or false\n");
exit(EXIT_FAILURE);
}
}
/****************************************************************************
* Private Functions
****************************************************************************/
static void i8sak_switch_instance(FAR char *ifname)
{
FAR struct i8sak_s *i8sak;
/* Search list of i8sak instances for one associated with the provided
* device.
*/
i8sak = (FAR struct i8sak_s *)sq_peek(&g_i8sak_instances);
while (i8sak != NULL)
{
if (strcmp(ifname, i8sak->ifname) == 0)
{
break;
}
i8sak = (FAR struct i8sak_s *)sq_next((FAR sq_entry_t *)i8sak);
}
/* If there isn't a i8sak instance started for this device, allocate one */
if (i8sak == NULL)
{
i8sak = (FAR struct i8sak_s *)sq_remfirst(&g_i8sak_free);
if (i8sak == NULL)
{
fprintf(stderr, "ERROR: Failed to allocate i8sak instance\n");
exit(EXIT_FAILURE);
}
sq_addlast((FAR sq_entry_t *)i8sak, &g_i8sak_instances);
/* Update our "sticky" i8sak instance. Must come before call to setup so that
* the shared active global i8sak is correct.
*/
g_activei8sak = i8sak;
if (i8sak_setup(i8sak, ifname) < 0)
{
exit(EXIT_FAILURE);
}
}
else
{
g_activei8sak = i8sak;
}
g_activei8sak_set = true;
}
static int i8sak_setup(FAR struct i8sak_s *i8sak, FAR const char *ifname)
{
int i;
int fd = 0;
if (i8sak->initialized)
{
return OK;
}
if (strlen(ifname) > I8SAK_MAX_IFNAME)
{
fprintf(stderr, "ERROR: ifname too long\n");
return ERROR;
}
strcpy(&i8sak->ifname[0], ifname);
i8sak->chan = 11;
i8sak->chpage = 0;
i8sak->addrmode = IEEE802154_ADDRMODE_SHORT;
i8sak->ep_addr.mode = IEEE802154_ADDRMODE_SHORT;
/* Initialize the default remote endpoint address */
for (i = 0; i < IEEE802154_EADDRSIZE; i++)
{
i8sak->ep_addr.eaddr[i] =
(uint8_t)((CONFIG_IEEE802154_I8SAK_DEFAULT_EP_EADDR >> (i*8)) & 0xFF);
}
for (i = 0; i < IEEE802154_SADDRSIZE; i++)
{
i8sak->ep_addr.saddr[i] =
(uint8_t)((CONFIG_IEEE802154_I8SAK_DEFAULT_EP_SADDR >> (i*8)) & 0xFF);
}
for (i = 0; i < IEEE802154_PANIDSIZE; i++)
{
i8sak->ep_addr.panid[i] =
(uint8_t)((CONFIG_IEEE802154_I8SAK_DEFAULT_EP_PANID >> (i*8)) & 0xFF);
}
#ifdef CONFIG_NET_6LOWPAN
i8sak->ep_in6addr.sin6_family = AF_INET6;
i8sak->ep_in6addr.sin6_port = HTONS(CONFIG_IEEE802154_I8SAK_DEFAULT_PORT);
i8sak_update_ep_ip(i8sak);
i8sak->snifferport = HTONS(CONFIG_IEEE802154_I8SAK_DEFAULT_PORT);
#endif
/* Set the next association device to the default device address, so that
* the first device to request association gets that address.
*/
for (i = 0; i < IEEE802154_SADDRSIZE; i++)
{
i8sak->next_saddr[i] =
(uint8_t)(((CONFIG_IEEE802154_I8SAK_DEFAULT_EP_SADDR + 1) >> (i*8)) & 0xFF);
}
/* Check if argument starts with /dev/ */
if (strncmp(ifname, "/dev/", 5) == 0)
{
i8sak->mode = I8SAK_MODE_CHAR;
}
else
{
i8sak->mode = I8SAK_MODE_NETIF;
}
if (i8sak->mode == I8SAK_MODE_CHAR)
{
fd = open(i8sak->ifname, O_RDWR);
if (fd < 0)
{
fprintf(stderr, "ERROR: cannot open %s, errno=%d\n", i8sak->ifname, errno);
i8sak_cmd_error(i8sak);
}
}
#ifdef CONFIG_NET_6LOWPAN
else if (i8sak->mode == I8SAK_MODE_NETIF)
{
fd = socket(PF_INET6, SOCK_DGRAM, 0);
if (fd < 0)
{
fprintf(stderr, "ERROR: failed to open socket, errno=%d\n", errno);
i8sak_cmd_error(i8sak);
}
}
#endif
else
{
close(fd);
return ERROR;
}
close(fd);
sem_init(&i8sak->exclsem, 0, 1);
sem_init(&i8sak->updatesem, 0, 0);
sem_setprotocol(&i8sak->updatesem, SEM_PRIO_NONE);
sem_init(&i8sak->sigsem, 0, 0);
sem_setprotocol(&i8sak->sigsem, SEM_PRIO_NONE);
sem_init(&i8sak->eventsem, 0, 1);
sem_init(&i8sak->daemonlock, 0, 1);
i8sak->daemonusers = 0;
i8sak->eventlistener_run = false;
sq_init(&i8sak->eventreceivers);
sq_init(&i8sak->eventreceivers_free);
for (i = 0; i < CONFIG_I8SAK_NEVENTRECEIVERS; i++)
{
sq_addlast((FAR sq_entry_t *)&i8sak->eventreceiver_pool[i], &i8sak->eventreceivers_free);
}
i8sak->blasterperiod = 1000;
i8sak->initialized = true;
return OK;
}
/****************************************************************************
* Name : i8sak_daemon
*
* Description :
* Runs command in seperate task
****************************************************************************/
static int i8sak_daemon(int argc, FAR char *argv[])
{
FAR struct i8sak_s *i8sak = g_activei8sak;
int ret;
fprintf(stderr, "i8sak: daemon started\n");
if (i8sak->mode == I8SAK_MODE_CHAR)
{
i8sak->fd = open(i8sak->ifname, O_RDWR);
if (i8sak->fd < 0)
{
fprintf(stderr, "ERROR: cannot open %s, errno=%d\n", i8sak->ifname, errno);
ret = errno;
return ret;
}
}
#ifdef CONFIG_NET_6LOWPAN
else if (i8sak->mode == I8SAK_MODE_NETIF)
{
i8sak->fd = socket(PF_INET6, SOCK_DGRAM, 0);
if (i8sak->fd < 0)
{
fprintf(stderr, "ERROR: failed to open socket, errno=%d\n", errno);
ret = errno;
return ret;
}
}
#endif
i8sak_eventlistener_start(i8sak);
/* Signal the calling thread that the daemon is up and running */
sem_post(&i8sak->sigsem);
while (!i8sak->daemon_shutdown)
{
ret = sem_wait(&i8sak->updatesem);
if (ret != OK)
{
continue;
}
if (i8sak->startblaster)
{
i8sak->blasterenabled = true;
i8sak->startblaster = false;
ret = pthread_create(&i8sak->blaster_threadid, NULL, i8sak_blaster_thread,
(void *)i8sak);
if (ret != 0)
{
fprintf(stderr, "failed to start blaster thread: %d\n", ret);
return ret;
}
}
if (i8sak->startsniffer)
{
i8sak->snifferenabled = true;
i8sak->startsniffer = false;
ret = pthread_create(&i8sak->sniffer_threadid, NULL, i8sak_sniffer_thread,
(void *)i8sak);
if (ret != 0)
{
fprintf(stderr, "failed to start sniffer thread: %d\n", ret);
return ret;
}
}
}
i8sak_eventlistener_stop(i8sak);
close(i8sak->fd);
printf("i8sak: daemon closing\n");
return OK;
}
/****************************************************************************
* Name: i8sak_showusage
*
* Description:
* Show program usage.
*
****************************************************************************/
static int i8sak_showusage(FAR const char *progname, int exitcode)
{
fprintf(stderr, "Usage (Use the -h option on any command to get more info): %s\n"
" acceptassoc [-h|e]\n"
" assoc [-h|p|e|s|w|r|t]\n"
" blaster [-h|q|f|p]\n"
" get [-h] parameter\n"
" poll [-h]\n"
" regdump [-h]\n"
" reset [-h]\n"
" scan [-h|p|a|e] minch-maxch\n"
" set [-h] param val\n"
" sniffer [-h|d]\n"
" startpan [-h|b|s] xx:xx\n"
" tx [-h|d|m] <hex-payload>\n"
, progname);
exit(exitcode);
}
/****************************************************************************
* i8_main
****************************************************************************/
int main(int argc, FAR char *argv[])
{
FAR const struct i8sak_command_s *i8sakcmd;
int argind;
int ret;
int i;
if (!g_i8sak_initialized)
{
sq_init(&g_i8sak_free);
sq_init(&g_i8sak_instances);
for (i = 0; i < CONFIG_IEEE802154_I8SAK_NINSTANCES; i++)
{
sq_addlast((FAR sq_entry_t *)&g_i8sak_pool[i], &g_i8sak_free);
g_i8sak_pool[i].initialized = false;
}
g_i8sak_initialized = true;
}
argind = 1;
/* Check if ifname was included */
if (argc > 1)
{
/* Check if argument starts with /dev/ */
if ((strncmp(argv[argind], "/dev/", 5) == 0) ||
(strncmp(argv[argind], "wpan", 4) == 0))
{
i8sak_switch_instance(argv[argind]);
argind++;
if (argc == 2)
{
/* Close silently to allow user to set ifname without any
* other operation.
*/
return EXIT_SUCCESS;
}
}
/* Argument must be command */
}
/* If ifname wasn't included, we need to check if our sticky feature has
* ever been set.
*/
if (!g_activei8sak_set)
{
fprintf(stderr, "ERROR: Must include ifname the first time you run\n");
i8sak_showusage(argv[0], EXIT_FAILURE);
}
/* Check to make sure the user supplied a command */
if (argc <= argind)
{
fprintf(stderr, "ERROR: Must include a command\n");
i8sak_showusage(argv[0], EXIT_FAILURE);
}
/* Find the command in the g_i8sak_command[] list */
i8sakcmd = NULL;
for (i = 0; i < NCOMMANDS; i++)
{
FAR const struct i8sak_command_s *cmd = &g_i8sak_commands[i];
if (strcmp(argv[argind], cmd->name) == 0)
{
i8sakcmd = cmd;
break;
}
}
if (i8sakcmd == NULL)
{
i8sak_showusage(argv[0], EXIT_FAILURE);
}
/* Special case the help command which has no handler */
if (i8sakcmd->handler == NULL)
{
i8sak_showusage(argv[0], EXIT_SUCCESS);
}
ret = sem_wait(&g_activei8sak->exclsem);
if (ret < 0)
{
fprintf(stderr, "ERROR: Failed to lock i8sak instance\n");
exit(EXIT_FAILURE);
}
i8sakcmd->handler(g_activei8sak, argc - argind, &argv[argind]);
sem_post(&g_activei8sak->exclsem);
return EXIT_SUCCESS;
}
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