/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * 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 of the copyright holder 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 "../core/ipv4/etharp.c"  /* for arp_table */
#define icmp6_hdr netinet_icmp6_hdr
#include <netinet/icmp6.h>
#undef icmp6_hdr
#include "lwip/fixme.h"
#include "lwip/opt.h"

#if LWIP_ENABLE_LOS_SHELL_CMD
#include "lwip/api.h"
#include "lwip/tcpip.h"
#include "lwip/netif.h"
#include "lwip/netdb.h"
#include "lwip/stats.h"
#include "lwip/err.h"
#include "lwip/inet.h"
#include "netif/etharp.h"
#include "lwip/ip_addr.h"
#include "lwip/ip6_addr.h"
#include "lwip/icmp.h"
#include "lwip/priv/nd6_priv.h"
#include "lwip/sockets.h"
#include "lwip/inet_chksum.h"
#include "lwip/raw.h"
#include "los_config.h"
#include <string.h>
#include "limits.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <time.h>
#include <ctype.h>
#include <poll.h>

#include "lwip/api_shell.h"

#include "lwip/dns.h"
#include "lwip/netdb.h"
#include "lwip/udp.h"
#include "lwip/priv/tcp_priv.h"

#include "lwip/dhcp.h"
#include "lwip/netifapi.h"
#include "los_strnlen_user.h"
#include "linux/kernel.h"
#ifdef LOSCFG_SHELL
#include "shcmd.h"
#include "shell.h"
#endif

#define LWIP_STATIC static

#if LWIP_ARP
extern sys_sem_t ip_conflict_detect;
#endif
extern volatile int tcpip_init_finish;
extern const char *const tcp_state_str[];
extern int get_unused_socket_num(void);

#if LWIP_IPV6
#define LWIP_MAX_PING6_ARG_COUNT              64
#define LWIP_PING6_STANDARD_PKT_SIZE          56
#define LWIP_PING6_STARTING_SEQ_NUM           0x2255
#define LWIP_PING6_OUT_OF_ORDER_MAGNITUDE     1

#define LWIP_PING6_COUNT_ARG           1
#define LWIP_PING6_SOURCE_ADDRESS_ARG  2
#define LWIP_PING6_INTERFACE_ARG       4
#define LWIP_PING6_HOSTNAME_ARG        8
#define LWIP_PING6_DEFAULT_SOCKET      16
#endif

/* Forward Declarations [START] */
#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
int print_netif(struct netif *netif, char *print_buf, unsigned int buf_len);

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_ifconfig_show_internal(void *arg);

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_ifconfig_internal(void *arg);

void lwip_printsize(size_t size);
LWIP_STATIC void lwip_ifconfig_usage(const char *cmd);

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_arp_show_internal(struct netif *netif, char *printf_buf, unsigned int buf_len);

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_arp_internal(void *arg);

LWIP_STATIC void lwip_arp_usage(const char *cmd);
void ifup_internal(void *arg);
void ifdown_internal(void *arg);

#if LWIP_DNS
LWIP_STATIC unsigned int get_hostip(const char *hname);

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
struct hostent *gethostnameinfo(const char *host);

#endif /* LWIP_DNS */

#ifdef LWIP_DEBUG_INFO
LWIP_STATIC u32_t netdebug_memp(int argc, const char **argv);
LWIP_STATIC u32_t netdebug_sock(int argc, const char **argv);
u32_t osShellNetDebug(int argc, const char **argv);
u32_t osShellIpDebug(int argc, const char **argv);
#endif /* LWIP_DEBUG_INFO */
#if LWIP_IPV6
/* Holds params for ping6 task */
typedef struct ping6_args {
    u8_t args_found;
    u8_t interface_index;
    u8_t host_index;
    u8_t pad;
    u32_t pingcount;
    ip6_addr_t src_addr;
    ip6_addr_t dst_addr;
} ping6_args_t;

/* Holds stats for ongoing ping6 task */
typedef struct ping6_stats {
    u32_t flag;
    u32_t min_rtt;
    u32_t max_rtt;
    float avg_rtt;
} ping6_stats_t;
LWIP_STATIC void update_ping6_stats(ping6_stats_t *ping6_stats, u32_t rtt, u32_t nrecieved);
LWIP_STATIC int parse_args_ping6(int argc, const char **argv, ping6_args_t *ping6_params);

u32_t osShellPing6(int argc, const char **argv);
LWIP_STATIC int create_ping6_socket(u8_t type, const void *param);
LWIP_STATIC const char *convert_icmpv6_err_to_string(u8_t err_type);
#endif /* LWIP_IPV6 */
u32_t osTcpserver(int argc, const char **argv);
void udpserver(int argc, const char **argv);
void tcp_access(int sockfd);
#if LWIP_IPV6
int netstat_get_udp_sendQLen6(struct udp_pcb *udppcb, struct pbuf *udpbuf);
int netstat_udp_sendq6(struct udp_pcb *upcb);
#endif
#if LWIP_IPV4
int netstat_get_udp_sendQLen(struct udp_pcb *udppcb, struct pbuf *udpbuf);
#endif
int netstat_tcp_sendq(struct tcp_pcb *tpcb);
int netstat_tcp_recvq(struct tcp_pcb *tpcb);
int netstat_netconn_recvq(const struct netconn *conn);

int netstat_udp_sendq(struct udp_pcb *upcb);
int netstat_netconn_sendq(struct netconn *conn);
/* Forward Declarations [END] */

#define IFCONFIG_OPTION_SET_IP          (1)
#define IFCONFIG_OPTION_SET_NETMASK     (1 << 1)
#define IFCONFIG_OPTION_SET_GW          (1 << 2)
#define IFCONFIG_OPTION_SET_HW          (1 << 3)
#define IFCONFIG_OPTION_SET_UP          (1 << 4)
#define IFCONFIG_OPTION_SET_DOWN        (1 << 5)
#define IFCONFIG_OPTION_SET_MTU         (1 << 6)
#define IFCONFIG_OPTION_DEL_IP          (1 << 7)

#define NETSTAT_ENTRY_SIZE 120
#define MAX_NETSTAT_ENTRY (NETSTAT_ENTRY_SIZE * (MEMP_NUM_TCP_PCB + MEMP_NUM_UDP_PCB + MEMP_NUM_TCP_PCB_LISTEN + 1))

#define PRINT_BUF_LEN   1024
#define MAX_MACADDR_STRING_LENGTH    18 /* including NULL */

#define CONVERT_STRING_TO_HEX(_src, _dest)                                                      \
{                                                                                               \
    const char *_srcString = (char *)_src;                                                      \
    _dest = 0;                                                                                  \
    while (*_srcString) {                                                                       \
        _dest = (unsigned char)((_dest << 4) & 0xFF);                                           \
        if ((*_srcString >= 48) && (*_srcString <= 57))    /* between 0 to 9 */                 \
            _dest |= (unsigned char)(*_srcString - 48);                                         \
        else if ((*_srcString >= 65 && *_srcString <= 70)) /* between A to F */                 \
            _dest |= (unsigned char)((*_srcString - 65) + 10);                                  \
        else if ((*_srcString >= 97 && *_srcString <= 102)) /* between a to f */                \
            _dest |= (unsigned char)((*_srcString - 97) + 10);                                  \
        else break;                                                                             \
        ++_srcString;                                                                           \
    }                                                                                           \
}

#define ERR_IFCONFIG_STRING_PUT(ret, str)                                                       \
    do {                                                                                        \
        (ret) = snprintf_s(ifconfig_cmd->cb_print_buf + ifconfig_cmd->print_len,                \
                           PRINT_BUF_LEN - ifconfig_cmd->print_len,                             \
                           ((PRINT_BUF_LEN - ifconfig_cmd->print_len) - 1), (str));             \
        if (((ret) > 0) && ((unsigned int)(ret) < (PRINT_BUF_LEN - ifconfig_cmd->print_len)))   \
            ifconfig_cmd->print_len += (unsigned int)(ret);                                     \
    } while (0)                                                                                 \

#define LWIP_MSECS_TO_SECS(time_in_msecs) (time_in_msecs / 1000)
struct ifconfig_option {
    char iface[IFNAMSIZ];
    unsigned int option;
    ip_addr_t ip_addr;
    ip_addr_t netmask;
    ip_addr_t gw;
    unsigned char ethaddr[6];
    u16_t mtu;
    /* when using telnet, print to the telnet socket will result in system  */
    /* deadlock. So we cahe the prinf data to a buf, and when the tcpip      */
    /* callback returns, then print the data out to the telnet socket       */
    sys_sem_t cb_completed;
    char cb_print_buf[PRINT_BUF_LEN];
    unsigned int print_len;
};

struct netstat_data {
    s8_t *netstat_out_buf;
    u32_t netstat_out_buf_len;
    u32_t netstat_out_buf_updated_len;
    sys_sem_t cb_completed;
};

struct if_cmd_data {
    char *if_name;
    err_t err;
    sys_sem_t cb_completed;
};

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
int print_netif(struct netif *netif, char *print_buf, unsigned int buf_len)
{
    int i, ret;
    char *tmp = print_buf;
#if LWIP_IPV6
    char *addr = NULL;
#endif

    if (buf_len < 1) {
        goto out;
    }
    if (netif->link_layer_type == LOOPBACK_IF) {
        ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%.2s\t", netif->name);
    } else {
        ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%s\t", netif_get_name(netif));
    }
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;
#if LWIP_IPV4
    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "ip:%s ", ipaddr_ntoa(&netif->ip_addr));
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "netmask:%s ", ipaddr_ntoa(&netif->netmask));
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "gateway:%s\n", ipaddr_ntoa(&netif->gw));
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;
#endif

#if LWIP_IPV6
    for (i = 0; i < LWIP_IPV6_NUM_ADDRESSES; i++) {
        /* only PREFERRED addresses are displyaed */
        if (!ip6_addr_isvalid(netif->ip6_addr_state[i])) {
            continue;
        }
        addr = ip6addr_ntoa((const ip6_addr_t *)&netif->ip6_addr[i]);
        ret = snprintf_s(tmp, buf_len, (buf_len - 1), "\tip6: %s/64\n", addr ? addr : "::");
        if ((ret <= 0) || ((unsigned int)ret >= buf_len))
            goto out;
        tmp += ret;
        buf_len -= (unsigned int)ret;
    }
#endif

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "\tHWaddr ");
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    for (i = 0; i < netif->hwaddr_len - 1; i++) {
        ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%02x:", netif->hwaddr[i]);
        if ((ret <= 0) || ((unsigned int)ret >= buf_len))
            goto out;
        tmp += ret;
        buf_len -= (unsigned int)ret;
    }

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%02x", netif->hwaddr[i]);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), " MTU:%d %s", netif->mtu,
                     netif->flags & NETIF_FLAG_UP ? "Running" : "Stop");
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    if (netif_default == netif && netif_is_up(netif)) {
        ret = snprintf_s(tmp, buf_len, (buf_len - 1), " %s", "Default");
        if ((ret <= 0) || ((unsigned int)ret >= buf_len))
            goto out;
        tmp += ret;
        buf_len -= (unsigned int)ret;
    }

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), " %s\n", netif->flags & NETIF_FLAG_LINK_UP ? "Link UP" : "Link Down");
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        goto out;
    tmp += ret;

#if MIB2_STATS
    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "\tRX packets:%u ",
                     netif->mib2_counters.ifinucastpkts + netif->mib2_counters.ifinnucastpkts);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "errors:%u ", netif->mib2_counters.ifinerrors);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "dropped:%u ", netif->mib2_counters.ifindiscards);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "overruns:%u\n", netif->mib2_counters.ifinoverruns);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "\tTX packets:%u ",
                     netif->mib2_counters.ifoutucastpkts + netif->mib2_counters.ifoutnucastpkts);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "errors:%u ", netif->mib2_counters.ifouterrors);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "dropped:%u\n", netif->mib2_counters.ifoutdiscards);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "\tRX bytes:%u ", netif->mib2_counters.ifinoctets);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "TX bytes:%u\n", netif->mib2_counters.ifoutoctets);
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
      goto out;
    tmp += ret;
    buf_len -= (unsigned int)ret;
#endif

out:
    return (int)(tmp - print_buf);
}

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_ifconfig_show_internal(void *arg)
{
    struct netif *netif = NULL;
    struct ifconfig_option *ifconfig_cmd = (struct ifconfig_option *)arg;
    int ret;

    if (netif_list == NULL) {
        ret = snprintf_s(ifconfig_cmd->cb_print_buf, PRINT_BUF_LEN - ifconfig_cmd->print_len,
                         ((PRINT_BUF_LEN - ifconfig_cmd->print_len) - 1), "Device not init\n");
        if ((ret > 0) && ((unsigned int)ret < (PRINT_BUF_LEN - ifconfig_cmd->print_len))) {
            ifconfig_cmd->print_len += (unsigned int)ret;
        }
        sys_sem_signal(&ifconfig_cmd->cb_completed);
        return;
    }

    if (ifconfig_cmd->iface[0] == '\0') {
        /* display all netif */
        for (netif = netif_list; netif != NULL; netif = netif->next) {
            ret = print_netif(netif, ifconfig_cmd->cb_print_buf + ifconfig_cmd->print_len,
                              PRINT_BUF_LEN - ifconfig_cmd->print_len);
            ifconfig_cmd->print_len += (unsigned int)ret;
        }
    } else {
        netif = netif_find(ifconfig_cmd->iface);
        if (netif == NULL) {
            ret = snprintf_s(ifconfig_cmd->cb_print_buf + ifconfig_cmd->print_len,
                             (PRINT_BUF_LEN - ifconfig_cmd->print_len),
                             ((PRINT_BUF_LEN - ifconfig_cmd->print_len) - 1), "Device not found\n");
            if ((ret > 0) && ((unsigned int)ret < (PRINT_BUF_LEN - ifconfig_cmd->print_len))) {
                ifconfig_cmd->print_len += (unsigned int)ret;
            }

            sys_sem_signal(&ifconfig_cmd->cb_completed);
            return;
        }

        ret = print_netif(netif, ifconfig_cmd->cb_print_buf + ifconfig_cmd->print_len,
                          PRINT_BUF_LEN - ifconfig_cmd->print_len);
        ifconfig_cmd->print_len += (unsigned int)ret;
    }
    sys_sem_signal(&ifconfig_cmd->cb_completed);
}

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_ifconfig_internal(void *arg)
{
    struct ifconfig_option *ifconfig_cmd = NULL;
    struct netif *netif = NULL;
    ip_addr_t ip_addr;
    ip_addr_t netmask;
    ip_addr_t gw;
    unsigned short mtu;
    struct netif *loc_netif = NULL;
    int ret;
    s8_t idx;
    err_t err;

    ifconfig_cmd = (struct ifconfig_option *)arg;
    netif = netif_find(ifconfig_cmd->iface);
    if (netif == NULL) {
        ERR_IFCONFIG_STRING_PUT(ret, "Device not found\n");
        goto out;
    }

    if (ifconfig_cmd->option & IFCONFIG_OPTION_SET_UP) {
        (void)netif_set_up(netif);
        goto out;
    } else if (ifconfig_cmd->option & IFCONFIG_OPTION_SET_DOWN) {
        (void)netif_set_down(netif);
        goto out;
    }

    if ((ifconfig_cmd->option & IFCONFIG_OPTION_SET_IP) ||
        (ifconfig_cmd->option & IFCONFIG_OPTION_SET_NETMASK) ||
        (ifconfig_cmd->option & IFCONFIG_OPTION_SET_HW)) {
        (void)netif_set_down(netif);
    }

    if (ifconfig_cmd->option & IFCONFIG_OPTION_SET_IP) {
        ip_addr_set_val(&ip_addr, &(ifconfig_cmd->ip_addr));
        if (IP_IS_V4_VAL(ifconfig_cmd->ip_addr)) {
            /* check the address is not multicast/broadcast/0/loopback */
            if (ip_addr_ismulticast_val(&ip_addr) || ip_addr_isbroadcast_val(&ip_addr, netif) ||
                ip_addr_isany(&ip_addr) || ip_addr_isloopback(&ip_addr)) {
                ERR_IFCONFIG_STRING_PUT(ret, "Don't set ip as a multicast/broadcast/0/loopback address!\n");
                goto out;
            }

            /* reset gateway if new and previous ipaddr not in same net */
            if (!ip_addr_netcmp_val(&ip_addr, &netif->ip_addr, ip_2_ip4(&netif->netmask))) {
                ip_addr_set_zero(&netif->gw);
                if (netif == netif_default) {
                    (void)netif_set_default(NULL);
                }
            }

            /* lwip disallow two netif sit in same net at the same time */
            loc_netif = netif_list;
            while (loc_netif != NULL) {
                if (loc_netif == netif) {
                    loc_netif = loc_netif->next;
                    continue;
                }
                if (IP_IS_V4_VAL(ifconfig_cmd->ip_addr) && ip_addr_cmp(&netif->netmask, &loc_netif->netmask) &&
                    ip_addr_netcmp_val(&loc_netif->ip_addr, &ip_addr, ip_2_ip4(&netif->netmask))) {
                    ERR_IFCONFIG_STRING_PUT(ret, "Duplicate network!\n");
                    goto out;
                }
                loc_netif = loc_netif->next;
            }

#if LWIP_DHCP
            if (netif_dhcp_data(netif) && netif_dhcp_data(netif)->state != DHCP_STATE_OFF) {
                (void)netif_dhcp_off(netif);
            }
#endif
            netif_set_ipaddr(netif, ip_2_ip4(&ip_addr));
        } else if (IP_IS_V6_VAL(ifconfig_cmd->ip_addr)) {
            idx = -1;
            err = netif_add_ip6_address(netif, ip_2_ip6(&ip_addr), &idx);
            if (err != ERR_OK || idx == -1) {
                ERR_IFCONFIG_STRING_PUT(ret, "The IPv6 has reached the Global address limit, "
                                             "you should delete one address before add!\n");
                goto out;
            }
        }
    }

    if (ifconfig_cmd->option & IFCONFIG_OPTION_DEL_IP) {
        (void)netif_do_rmv_ipv6_addr(netif, &ifconfig_cmd->ip_addr);
    }

    if (ifconfig_cmd->option & IFCONFIG_OPTION_SET_NETMASK) {
        ip_addr_set_val(&netmask, &(ifconfig_cmd->netmask));
        /* check data valid */
        if (!ip_addr_netmask_valid(ip_2_ip4(&netmask))) {
            ERR_IFCONFIG_STRING_PUT(ret, "ifconfig: netmask is invalid!\n");
            goto out;
        }

#if LWIP_DHCP
        if (netif_dhcp_data(netif) && netif_dhcp_data(netif)->state != DHCP_STATE_OFF) {
            (void)netif_dhcp_off(netif);
        }
#endif
        if (netif_ip4_netmask(netif)->addr != ip_2_ip4(&netmask)->addr) {
            /* lwip disallow two netif sit in same net at the same time */
            loc_netif = netif_list;
            while (loc_netif != NULL) {
                if (loc_netif == netif) {
                    loc_netif = loc_netif->next;
                    continue;
                }
                if (ip_addr_cmp(&loc_netif->netmask, &netmask) &&
                    ip_addr_netcmp(&loc_netif->ip_addr, &netif->ip_addr, ip_2_ip4(&netmask))) {
                    ERR_IFCONFIG_STRING_PUT(ret, "Duplicate network!\n");
                    goto out;
                }
                loc_netif = loc_netif->next;
            }
            netif_set_netmask(netif, ip_2_ip4(&netmask));
            /* check if gateway still reachable */
            if (!ip_addr_netcmp(&netif->gw, &netif->ip_addr, ip_2_ip4(&netmask))) {
                ip_addr_set_zero(&(netif->gw));
                if (netif == netif_default) {
                    (void)netif_set_default(NULL);
                }
            }
        }
    }

    if ((ifconfig_cmd->option & IFCONFIG_OPTION_SET_HW) &&
        netif_set_hwaddr(netif, ifconfig_cmd->ethaddr, NETIF_MAX_HWADDR_LEN) != ERR_OK) {
        ERR_IFCONFIG_STRING_PUT(ret, "Failed to update the hwaddr of the device!\n");
        (void)netif_set_up(netif);
        goto out;
    }

    if ((ifconfig_cmd->option & IFCONFIG_OPTION_SET_IP) ||
        (ifconfig_cmd->option & IFCONFIG_OPTION_SET_NETMASK) ||
        (ifconfig_cmd->option & IFCONFIG_OPTION_SET_HW)) {
        (void)netif_set_up(netif);
    }

    if (ifconfig_cmd->option & IFCONFIG_OPTION_SET_GW) {
        ip_addr_set_val(&gw, &ifconfig_cmd->gw);

        /* check the address multicast/0/loopback */
        if (ip_addr_ismulticast_val(&gw) || ip_addr_isbroadcast_val(&gw, netif) ||
            ip_addr_isany(&gw) || ip_addr_isloopback(&gw)) {
            ERR_IFCONFIG_STRING_PUT(ret, "Don't set gateway as a multicast/broadcast/0/loopback address!\n");
            goto out;
        }

        /* check if reachable */
        if (!ip_addr_netcmp_val(&gw, &netif->ip_addr, ip_2_ip4(&netif->netmask))) {
            ERR_IFCONFIG_STRING_PUT(ret, "The address is unreachable!\n");
            goto out;
        }

        if (netif_default != netif) {
            ip_addr_set_zero(&netif->gw);
            (void)netif_set_default(netif);
        }

#if LWIP_DHCP
        if (netif_dhcp_data(netif) && netif_dhcp_data(netif)->state != DHCP_STATE_OFF) {
            (void)netif_dhcp_off(netif);
        }
#endif
        netif_set_gw(netif, ip_2_ip4(&gw));
    }

    if (ifconfig_cmd->option & IFCONFIG_OPTION_SET_MTU) {
        mtu = ifconfig_cmd->mtu;
        if (netif_set_mtu(netif, mtu) != ERR_OK) {
            ERR_IFCONFIG_STRING_PUT(ret, "Invalid MTU\n");
        }
    }
out:
    sys_sem_signal(&ifconfig_cmd->cb_completed);
}


void lwip_printsize(size_t size)
{
    static const char *SIZES[] = {"B", "KB", "MB", "GB"};
    size_t divis = 0;
    size_t rem = 0;

    while ((size >= 1024) && (divis < ((sizeof(SIZES) / sizeof(char *)) - 1))) {
        rem = (size % 1024);
        divis++;
        size /= 1024;
    }

    PRINTK("(%.1f %s) \r\n", (float)size + (float)rem / 1024.0, SIZES[divis]);
}

LWIP_STATIC void lwip_ifconfig_usage(const char *cmd)
{
    PRINTK("Usage:"\
         "\n%s [-a] "\
         "\n[interface]"\
         "\n[interface ipaddr] <netmask mask> <gateway gw>"\
         "\n[interface inet6 add|del ipaddr]"\
         "\n[interface hw ether MAC]"\
         "\n[interface mtu NN]"\
         "\n[interface up|down]\n",
           cmd);
}

u32_t lwip_ifconfig(int argc, const char **argv)
{
    int i;
    static struct ifconfig_option ifconfig_cmd;
    err_t ret;

#if LWIP_STATS
    u32_t stat_err_cnt;
    u32_t stat_drop_cnt;
    u32_t stat_rx_or_tx_cnt;
    u32_t stat_rx_or_tx_bytes;
#endif

#if LWIP_ARP
    u32_t retval;
    struct netif *netiftmp = NULL;
#if LWIP_ENABLE_IP_CONFLICT_SIGNAL
    u32_t old_ip4addr;
    err_t        err;
    extern sys_sem_t ip_conflict_detect;
    extern u32_t is_ip_conflict_signal;
#endif /* LWIP_ENABLE_IP_CONFLICT_SIGNAL */
#endif /* LWIP_ARP */
#if LWIP_IPV6
    extern sys_sem_t dup_addr_detect;
    extern u32_t is_dup_detect_initialized;
#endif
    if (!tcpip_init_finish) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        return 2;
    }
    /* To support "ifconfig -a" command
         RX packets:XXXX errors:X dropped:X overruns:X bytes:XXXX (Human readable format)
         TX packets:XXXX errors:X dropped:X overruns:X bytes:XXXX (Human readable format)

         Below is assumed for 'overrun' stat.
         Linux Kernel:
                RX: FIFO overrun
                    Data structure: net_device->stats->rx_fifo_errors
                    Flag which is marked when FIFO overrun: ENRSR_FO

                Function: ei_receive->ENRSR_FO

                TX: A "FIFO underrun" occurred during transmit.
                    Data structure: net_device->stats->tx_fifo_errors
                    Flag which is marked when FIFO underrun: ENTSR_FU

                Function: ei_tx_intr->ENTSR_FU

        LWIP:
            So in our case,
            while receiving a packet RX case, if the buffer is full (trypost - it is sys_mbox_trypost)
            the error will be returned, we can consider that an overflow has happened.
            So this can be RX overrun.

            But while transmitting a packet TX case, underrun cannot happen because it block on the
            message Q if it is full (NOT trypost - it is sys_mbox_post). So TX overrun is always 0.
    */
    if (argc) {
        if (strcmp("-a", argv[0]) == 0) {
#if LWIP_STATS
            stat_rx_or_tx_cnt = lwip_stats.ip.recv;
            stat_err_cnt = (u32_t)(lwip_stats.ip.ip_rx_err +
                                   lwip_stats.ip.lenerr +
                                   lwip_stats.ip.chkerr +
                                   lwip_stats.ip.opterr +
                                   lwip_stats.ip.proterr);
            stat_drop_cnt = (u32_t)(lwip_stats.ip.drop + lwip_stats.link.link_rx_drop);
            stat_rx_or_tx_bytes = lwip_stats.ip.ip_rx_bytes;

            PRINTK("%18s:%u\t errors:%u\t ip dropped:%u\t link dropped:%u\t overrun:%d\t bytes:%u ",
                   "RX packets",
                   stat_rx_or_tx_cnt,
                   stat_err_cnt,
                   stat_drop_cnt,
                   lwip_stats.link.link_rx_drop,
                   lwip_stats.ip.link_rx_overrun,
                   stat_rx_or_tx_bytes);

            /* Print in Human readable format of the incoming bytes */
            lwip_printsize(lwip_stats.ip.ip_rx_bytes);
#if IP6_STATS
            stat_rx_or_tx_cnt = lwip_stats.ip6.recv;
            stat_err_cnt = (u32_t)(lwip_stats.ip6.ip_rx_err +
                                   lwip_stats.ip6.lenerr +
                                   lwip_stats.ip6.chkerr +
                                   lwip_stats.ip6.opterr +
                                   lwip_stats.ip6.proterr);
            stat_drop_cnt = lwip_stats.ip6.drop;
            stat_rx_or_tx_bytes = lwip_stats.ip6.ip_rx_bytes;

            PRINTK("%18s:%u\t errors:%u\t dropped:%u\t overrun:%d\t bytes:%u ",
                   "RX packets(ip6)",
                   stat_rx_or_tx_cnt,
                   stat_err_cnt,
                   stat_drop_cnt,
                   lwip_stats.ip.link_rx_overrun,
                   stat_rx_or_tx_bytes);

            /* Print in Human readable format of the incoming bytes */
            lwip_printsize(lwip_stats.ip6.ip_rx_bytes);
#endif
            stat_rx_or_tx_cnt = (u32_t)(lwip_stats.ip.fw + lwip_stats.ip.xmit);
            stat_err_cnt = (u32_t)(lwip_stats.ip.rterr + lwip_stats.ip.ip_tx_err);
            /* IP layer drop stat param is not maintained, failure at IP is considered in 'errors' stat */
            stat_drop_cnt = lwip_stats.link.link_tx_drop;
            stat_rx_or_tx_bytes = lwip_stats.ip.ip_tx_bytes;

            PRINTK("%18s:%u\t errors:%u\t link dropped:%u\t overrun:0\t bytes:%u",
                   "TX packets",
                   stat_rx_or_tx_cnt,
                   stat_err_cnt,
                   stat_drop_cnt,
                   stat_rx_or_tx_bytes);

            /* Print in Human readable format of the outgoing bytes */
            lwip_printsize(lwip_stats.ip.ip_tx_bytes);

            stat_rx_or_tx_cnt = (u32_t)(lwip_stats.ip6.fw + lwip_stats.ip6.xmit);
            stat_err_cnt = (u32_t)(lwip_stats.ip6.rterr + lwip_stats.ip6.ip_tx_err);
            stat_rx_or_tx_bytes = lwip_stats.ip6.ip_tx_bytes;

            PRINTK("%18s:%u\t errors:%u\t overrun:0\t bytes:%u",
                   "TX packets(ip6)",
                   stat_rx_or_tx_cnt,
                   stat_err_cnt,
                   stat_rx_or_tx_bytes);

            /* Print in Human readable format of the outgoing bytes */
            lwip_printsize(lwip_stats.ip6.ip_tx_bytes);
#endif /* LWIP_STATS */
            return 0;
        }
    }

    (void)memset_s(&ifconfig_cmd, sizeof(ifconfig_cmd), 0, sizeof(ifconfig_cmd));
    if (sys_sem_new(&ifconfig_cmd.cb_completed, 0) != ERR_OK) {
        PRINTK("%s: sys_sem_new fail\n", __FUNCTION__);
        return 1;
    }

    i = 0;
    /* Get the interface */
    if (argc > 0) {
        if (strlen(argv[i]) < IFNAMSIZ) {
            if (strncpy_s(ifconfig_cmd.iface, IFNAMSIZ, argv[i], (strlen(argv[i]))) != EOK) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                PRINTK("ifconfig : strncpy_s error\n");
                return 1;
            }
            ifconfig_cmd.iface[IFNAMSIZ - 1] = '\0';
        } else {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            PRINTK("ifconfig : interface name is too big\n");
            return 1;
        }
        i++;
        argc--;
        if (argc == 0) {
            /* no more arguments, show the interface state. */
            ret = tcpip_callback(lwip_ifconfig_show_internal, &ifconfig_cmd);
            if (ret != ERR_OK) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                PRINTK("ifconfig : internal error, l:%d err:%d\n", __LINE__, ret);
                return 1;
            }
            (void)sys_arch_sem_wait(&ifconfig_cmd.cb_completed, 0);
            sys_sem_free(&ifconfig_cmd.cb_completed);
            ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
            PRINTK("%s", ifconfig_cmd.cb_print_buf);
            return 0;
        }
    } else {
        /* no more arguments, show all the interface state. */
        ret = tcpip_callback(lwip_ifconfig_show_internal, &ifconfig_cmd);
        if (ret != ERR_OK) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            PRINTK("ifconfig : internal error, l:%d err:%d\n", __LINE__, ret);
            return 1;
        }
        (void)sys_arch_sem_wait(&ifconfig_cmd.cb_completed, 0);
        sys_sem_free(&ifconfig_cmd.cb_completed);
        ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
        PRINTK("%s", ifconfig_cmd.cb_print_buf);

        return 0;
    }

    /* ifup/ifdown */
    if (strcmp("up", argv[i]) == 0) {
        ifconfig_cmd.option |= IFCONFIG_OPTION_SET_UP;
        /* setup the interface, other arguments is ignored. */
        ret = tcpip_callback(lwip_ifconfig_internal, &ifconfig_cmd);
        if (ret != ERR_OK) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            PRINTK("ifconfig : internal error, l:%d err:%d\n", __LINE__, ret);
            return 1;
        }
        (void)sys_arch_sem_wait(&ifconfig_cmd.cb_completed, 0);
        sys_sem_free(&ifconfig_cmd.cb_completed);
        ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
        PRINTK("%s", ifconfig_cmd.cb_print_buf);
        return 0;
    } else if (strcmp("down", argv[i]) == 0) {
        ifconfig_cmd.option |= IFCONFIG_OPTION_SET_DOWN;
        /* setdown the interface, other arguments is ignored. */
        ret = tcpip_callback(lwip_ifconfig_internal, &ifconfig_cmd);
        if (ret != ERR_OK) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            PRINTK("ifconfig : internal error, l:%d err:%d\n", __LINE__, ret);
            return 1;
        }
        (void)sys_arch_sem_wait(&ifconfig_cmd.cb_completed, 0);
        sys_sem_free(&ifconfig_cmd.cb_completed);
        ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
        PRINTK("%s", ifconfig_cmd.cb_print_buf);
        return 0;
    }
    /* check if set the ip address. */
#if LWIP_ARP
    netiftmp = netifapi_netif_find_by_name(ifconfig_cmd.iface);
    if (netiftmp == NULL) {
        sys_sem_free(&ifconfig_cmd.cb_completed);
        PRINTK("ifconfig : Interface %s not found\n", ifconfig_cmd.iface);
        return 1;
    }
#if LWIP_ENABLE_IP_CONFLICT_SIGNAL
    old_ip4addr = ipaddr_addr(ipaddr_ntoa(&netiftmp->ip_addr));
#endif /* LWIP_ENABLE_IP_CONFLICT_SIGNAL */
#endif /* LWIP_ARP */
    if (!strcmp(argv[i], "inet") || ip4addr_aton(argv[i], ip_2_ip4(&ifconfig_cmd.ip_addr))) {
        if (!strcmp(argv[i], "inet")) {
            if (argc <= 1) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                goto ifconfig_error;
            }

            if (!ip4addr_aton(argv[i + 1], ip_2_ip4(&ifconfig_cmd.ip_addr))) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                PRINTK("ifconfig : Invalid IPv4 Address\n");
                return 1;
            }
            argc--;
            i++;
        }
        IP_SET_TYPE_VAL((ifconfig_cmd.ip_addr), IPADDR_TYPE_V4);
#if LWIP_ARP
        if (!ip_addr_cmp(&ifconfig_cmd.ip_addr, &netiftmp->ip_addr)) {
            ifconfig_cmd.option |= IFCONFIG_OPTION_SET_IP;
        }
#else
        ifconfig_cmd.option |= IFCONFIG_OPTION_SET_IP;
#endif /* LWIP_ARP */
        argc--;
        i++;
    } else if (!strcmp(argv[i], "inet6")) {
        if (argc < 3) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            goto ifconfig_error;
        }
        if (strcmp(argv[i + 1], "add") && strcmp(argv[i + 1], "del")) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            goto ifconfig_error;
        }

        if (!ip6addr_aton(argv[i + 2], ip_2_ip6(&ifconfig_cmd.ip_addr))) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            PRINTK("ifconfig : Invalid IPv6 Address\n");
            return 1;
        }

        IP_SET_TYPE_VAL((ifconfig_cmd.ip_addr), IPADDR_TYPE_V6);
        ifconfig_cmd.option |= (!strcmp(argv[i + 1], "add") ? IFCONFIG_OPTION_SET_IP : IFCONFIG_OPTION_DEL_IP);
        argc -= 3;
        i += 3;
    }

    if (ifconfig_cmd.option & IFCONFIG_OPTION_DEL_IP) {
        if (argc != 0) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            goto ifconfig_error;
        }
    }

    while (argc > 0) {
        if (strcmp("netmask", argv[i]) == 0 && (argc > 1) && (ipaddr_addr(argv[i + 1]) != IPADDR_NONE)) {
            /* if set netmask */
            ip_addr_set_ip4_u32_val((ifconfig_cmd.netmask), ipaddr_addr(argv[i + 1]));
            ifconfig_cmd.option |= IFCONFIG_OPTION_SET_NETMASK;
            i += 2;
            argc -= 2;
        } else if (strcmp("gateway", argv[i]) == 0 && (argc > 1) && (ipaddr_addr(argv[i + 1]) != IPADDR_NONE)) {
            /* if set gateway */
            ip_addr_set_ip4_u32_val((ifconfig_cmd.gw), ipaddr_addr(argv[i + 1]));
            ifconfig_cmd.option |= IFCONFIG_OPTION_SET_GW;
            i += 2;
            argc -= 2;
        } else if (strcmp("hw", argv[i]) == 0 && argc > 2 && strcmp("ether", argv[i + 1]) == 0) {
            /* if set HWaddr */
            char *digit = NULL;
            u32_t macaddrlen = strlen(argv[i + 2]) + 1;
            char tmpStr[MAX_MACADDR_STRING_LENGTH];
            char *tmpStr1 = NULL;
            char *saveptr = NULL;
            int j;

            if (macaddrlen != MAX_MACADDR_STRING_LENGTH) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                PRINTK("ifconfig : wrong MAC address format\n");
                return 1;
            }

            if (strncpy_s(tmpStr, MAX_MACADDR_STRING_LENGTH, argv[i + 2], macaddrlen - 1) != 0) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                PRINTK("ifconfig : wrong MAC address\n");
                return 1;
            }
            for (j = 0, tmpStr1 = tmpStr; j < 6; j++, tmpStr1 = NULL) {
                digit = strtok_r(tmpStr1, ":", &saveptr);
                if ((digit == NULL) || (strlen(digit) > 2)) {
                    sys_sem_free(&ifconfig_cmd.cb_completed);
                    PRINTK("ifconfig : wrong MAC address format\n");
                    return 1;
                }
                CONVERT_STRING_TO_HEX(digit, ifconfig_cmd.ethaddr[j]);
            }
            ifconfig_cmd.option |= IFCONFIG_OPTION_SET_HW;
            i += 3;
            argc -= 3;
        } else if (!strcmp("mtu", argv[i]) && (argc > 1)) {
            /* if set mtu */
            if ((atoi(argv[i + 1]) < 0) || (atoi(argv[i + 1]) > 0xFFFF)) {
                sys_sem_free(&ifconfig_cmd.cb_completed);
                PRINTK("\nifconfig: Invalid argument for mtu\n");
                goto ifconfig_error;
            }

            ifconfig_cmd.mtu = (u16_t)(atoi(argv[i + 1]));
            ifconfig_cmd.option |= IFCONFIG_OPTION_SET_MTU;
            i += 2;
            argc -= 2;
        } else {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            goto ifconfig_error;
        }
    }

#if LWIP_ARP && LWIP_ENABLE_IP_CONFLICT_SIGNAL
    if ((ifconfig_cmd.option & IFCONFIG_OPTION_SET_IP) && IP_IS_V4_VAL((ifconfig_cmd.ip_addr))) {
      /* Create the semaphore for ip conflict detection. */
      if (sys_sem_new(&ip_conflict_detect, 0) != ERR_OK) {
        sys_sem_free(&ifconfig_cmd.cb_completed);
        PRINTK("ifconfig: internal error\n");
        return 1;
      }
      is_ip_conflict_signal = 1;
    }
#endif /* LWIP_ARP && LWIP_ENABLE_IP_CONFLICT_SIGNAL */

#if LWIP_IPV6
    if ((ifconfig_cmd.option & IFCONFIG_OPTION_SET_IP) && IP_IS_V6_VAL((ifconfig_cmd.ip_addr))) {
        /* Create the semaphore for duplicate address detection. */
        if (sys_sem_new(&dup_addr_detect, 0) != ERR_OK) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            PRINTK("ifconfig: internal error\n");
            return 1;
        }
        is_dup_detect_initialized = 1;
    }
#endif /* LWIP_IPV6 */

    ret = tcpip_callback(lwip_ifconfig_internal, &ifconfig_cmd);
    if (ret != ERR_OK) {
        sys_sem_free(&ifconfig_cmd.cb_completed);
#if LWIP_ARP && LWIP_ENABLE_IP_CONFLICT_SIGNAL
        if ((ifconfig_cmd.option & IFCONFIG_OPTION_SET_IP) && IP_IS_V4_VAL((ifconfig_cmd.ip_addr))) {
          is_ip_conflict_signal = 0;
          sys_sem_free(&ip_conflict_detect);
        }
#endif /* LWIP_ARP && LWIP_ENABLE_IP_CONFLICT_SIGNAL */

#if LWIP_IPV6
        if ((ifconfig_cmd.option & IFCONFIG_OPTION_SET_IP) && IP_IS_V6_VAL((ifconfig_cmd.ip_addr))) {
            is_dup_detect_initialized = 0;
            sys_sem_free(&dup_addr_detect);
        }
#endif /* LWIP_IPV6 */

        PRINTK("%s : tcpip_callback failed in line %d : errnu %d", __FUNCTION__, __LINE__, ret);
        return 1;
    }
    (void)sys_arch_sem_wait(&ifconfig_cmd.cb_completed, 0);
    ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
    PRINTK("%s", ifconfig_cmd.cb_print_buf);
#if LWIP_ARP && LWIP_ENABLE_IP_CONFLICT_SIGNAL
    /* Pend 2 seconds for waiting the arp reply if the ip is already in use.*/
    if ((ifconfig_cmd.option & IFCONFIG_OPTION_SET_IP) && IP_IS_V4_VAL((ifconfig_cmd.ip_addr))) {
      err = (err_t)sys_arch_sem_wait(&ip_conflict_detect, DUP_ARP_DETECT_TIME);
      is_ip_conflict_signal = 0;
      sys_sem_free(&ip_conflict_detect);
      if (err < 0) {
        /* The result neither conflict nor timeout. */
        PRINT_ERR("ifconfig: internal error\n");
        sys_sem_free(&ifconfig_cmd.cb_completed);
        return 1;
      } else if (err < DUP_ARP_DETECT_TIME) {
        /* Duplicate use of new ip, restore it to the old one. */
        PRINT_ERR("ifconfig: ip conflict!\n");
        ip_addr_set_ip4_u32_val(ifconfig_cmd.ip_addr, old_ip4addr);
        ret = tcpip_callback(lwip_ifconfig_internal, &ifconfig_cmd);
        if (ret != ERR_OK) {
          sys_sem_free(&ifconfig_cmd.cb_completed);
          PRINTK("%s : tcpip_callback failed in line %d : errnu %d", __FUNCTION__, __LINE__, ret);
          return 1;
        }
        (void)sys_arch_sem_wait(&ifconfig_cmd.cb_completed, 0);
        sys_sem_free(&ifconfig_cmd.cb_completed);
        ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
        PRINTK("%s", ifconfig_cmd.cb_print_buf);
        return 1;
      }
    }
#endif /* LWIP_ARP && LWIP_ENABLE_IP_CONFLICT_SIGNAL */
#if LWIP_IPV6
    if ((ifconfig_cmd.option & IFCONFIG_OPTION_SET_IP) && IP_IS_V6_VAL(ifconfig_cmd.ip_addr)) {
        /* Pend 2 seconds for waiting the arp reply if the ip is already in use.*/
        retval = sys_arch_sem_wait(&dup_addr_detect, DUP_ARP_DETECT_TIME);
        is_dup_detect_initialized = 0;
        sys_sem_free(&dup_addr_detect);
        if (retval == SYS_ARCH_ERROR) {
            sys_sem_free(&ifconfig_cmd.cb_completed);
            /* The result neither conflict nor timeout. */
            PRINT_ERR("ifconfig: internal error\n");
            return 1;
        } else if (retval < DUP_ARP_DETECT_TIME) {
            /* Duplicate use of new ip, restore it to the old one. */
            struct netif *netif = NULL;
            PRINT_ERR("ifconfig: IP conflict!\n");
            netif = netifapi_netif_find_by_name(ifconfig_cmd.iface);
            i = netif_get_ip6_addr_match(netif, &ifconfig_cmd.ip_addr.u_addr.ip6);
            if (i >= 0) {
                netif->ip6_addr_state[i] = IP6_ADDR_INVALID;
            }

            sys_sem_free(&ifconfig_cmd.cb_completed);
            ifconfig_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
            PRINTK("%s", ifconfig_cmd.cb_print_buf);
            return 1;
        }
    }
#endif /* LWIP_IPV6 */
    sys_sem_free(&ifconfig_cmd.cb_completed);
    return 0;
ifconfig_error:
    lwip_ifconfig_usage("ifconfig");
    return 1;
}

#ifdef LOSCFG_SHELL
SHELLCMD_ENTRY(ifconfig_shellcmd, CMD_TYPE_EX, "ifconfig", XARGS, (CmdCallBackFunc)lwip_ifconfig);
#endif /* LOSCFG_SHELL */
/* add arp entry to arp cache */
#define ARP_OPTION_ADD      1
/* delete arp entry to arp cache */
#define ARP_OPTION_DEL      2
/* print all arp entry in arp cache */
#define ARP_OPTION_SHOW     3

struct arp_option {
    /* see the ARP_OPTION_ above */
    int option;
    /* descriptive abbreviation of network interface */
    char iface[IFNAMSIZ];
    /* ip addr */
    unsigned int ipaddr;
    /* hw addr */
    unsigned char ethaddr[6];
    /* when using telnet, printf to the telnet socket will result in system  */
    /* deadlock.so don't do it.cahe the data to prinf to a buf, and when     */
    /* callback returns, then printf the data out to the telnet socket       */
    sys_sem_t cb_completed;
    char cb_print_buf[PRINT_BUF_LEN];
    int print_buf_len;
};

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_arp_show_internal(struct netif *netif, char *printf_buf, unsigned int buf_len)
{
    u8_t state, i;
    int ret;
    char *tmp = printf_buf;
    if (buf_len < 1) {
        return;
    }
    ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%-24s%-24s%-12s%-12s\n", "Address", "HWaddress", "Iface", "Type");
    if ((ret <= 0) || ((unsigned int)ret >= buf_len))
        return;
    tmp += ret;
    buf_len -= (unsigned int)ret;

    if (netif != NULL) {
        for (i = 0; i < ARP_TABLE_SIZE; ++i) {
            state = arp_table[i].state;
            if (((state == ETHARP_STATE_STABLE)
                 #if ETHARP_SUPPORT_STATIC_ENTRIES
                 || (state == ETHARP_STATE_STATIC)
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
                ) && arp_table[i].netif) {

                if (strcmp(netif_get_name(netif), netif_get_name(arp_table[i].netif)) != 0) {
                    continue;
                }

                ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%-24s%02X:%02X:%02X:%02X:%02X:%02X       %s        %s\n",
                                 ip4addr_ntoa(&arp_table[i].ipaddr),
                                 arp_table[i].ethaddr.addr[0], arp_table[i].ethaddr.addr[1],
                                 arp_table[i].ethaddr.addr[2], arp_table[i].ethaddr.addr[3],
                                 arp_table[i].ethaddr.addr[4], arp_table[i].ethaddr.addr[5],
                                 netif_get_name(netif),
#if ETHARP_SUPPORT_STATIC_ENTRIES
                                 ((state == ETHARP_STATE_STATIC) ? "static" : "dynamic")
#else
                    "dynamic"
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
                );
                if ((ret <= 0) || ((unsigned int)ret >= buf_len))
                    return;
                tmp += ret;
                buf_len -= (unsigned int)ret;
            }
        }
    } else {
        for (i = 0; i < ARP_TABLE_SIZE; ++i) {
            state = arp_table[i].state;
            if (((state == ETHARP_STATE_STABLE)
                 #if ETHARP_SUPPORT_STATIC_ENTRIES
                 || (state == ETHARP_STATE_STATIC)
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
                ) && arp_table[i].netif) {
                ret = snprintf_s(tmp, buf_len, (buf_len - 1), "%-24s%02X:%02X:%02X:%02X:%02X:%02X       %s        %s\n",
                                 ip4addr_ntoa(&arp_table[i].ipaddr),
                                 arp_table[i].ethaddr.addr[0], arp_table[i].ethaddr.addr[1],
                                 arp_table[i].ethaddr.addr[2], arp_table[i].ethaddr.addr[3],
                                 arp_table[i].ethaddr.addr[4], arp_table[i].ethaddr.addr[5],
                                 netif_get_name(arp_table[i].netif),
#if ETHARP_SUPPORT_STATIC_ENTRIES
                                 ((state == ETHARP_STATE_STATIC) ? "static" : "dynamic")
#else
                    "dynamic"
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
                );
                if ((ret <= 0) || ((unsigned int)ret >= buf_len))
                    return;
                tmp += ret;
                buf_len -= (unsigned int)ret;
            }
        }
    }
}

#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
void lwip_arp_internal(void *arg)
{
#if LWIP_IPV4
    struct arp_option *arp_cmd = (struct arp_option *)arg;
    struct netif *netif = NULL;
    struct eth_addr ethaddr;
    ip4_addr_t ipaddr;
    err_t ret = 0;
    int type = 0;

    if (arp_cmd->iface[0] == 'd' && arp_cmd->iface[1] == 'e') {
        netif = NULL;
    } else {
        /* find the specified netif by it's name */
        netif = netif_find(arp_cmd->iface);
        if (netif == NULL) {
            (void)snprintf_s(arp_cmd->cb_print_buf, PRINT_BUF_LEN, (PRINT_BUF_LEN - 1), "No such device\n");
            goto out;
        }
    }

    type = arp_cmd->option;
    switch (type) {
        case ARP_OPTION_SHOW:
            if (netif != NULL) {
                lwip_arp_show_internal(netif, arp_cmd->cb_print_buf, PRINT_BUF_LEN);
            } else {
                lwip_arp_show_internal(NULL, arp_cmd->cb_print_buf, PRINT_BUF_LEN);
            }
            break;

        case ARP_OPTION_ADD:
#if ETHARP_SUPPORT_STATIC_ENTRIES
            ipaddr.addr = arp_cmd->ipaddr;
            (void)memcpy_s(ethaddr.addr, sizeof(ethaddr.addr), arp_cmd->ethaddr, 6);
            if (netif != NULL) {
                if (ip4_addr_netcmp(&ipaddr, ip_2_ip4(&(netif->ip_addr)), ip_2_ip4(&(netif->netmask)))) {
                    ret = etharp_update_arp_entry(netif, &ipaddr, &ethaddr,
                                                  ETHARP_FLAG_TRY_HARD | ETHARP_FLAG_STATIC_ENTRY);
                } else {
                    ret = ERR_RTE;
                }
            } else {
                ret = etharp_add_static_entry(&ipaddr, &ethaddr);
            }
#else
            ret = ERR_ARG;
#endif /* ETHARP_SUPPORT_STATIC_ENTRIES */
            break;

        case ARP_OPTION_DEL:
            ipaddr.addr = arp_cmd->ipaddr;
            (void)memcpy_s(ethaddr.addr, sizeof(ethaddr.addr), arp_cmd->ethaddr, 6);
            if (netif != NULL) {
                ret = etharp_delete_arp_entry(netif, &ipaddr);
            } else {
                for (netif = netif_list; netif != NULL; netif = netif->next) {
                    ret = etharp_delete_arp_entry(netif, &ipaddr);
                    if (ret == ERR_OK) {
                        /*only can del success one time*/
                        break;
                    }
                }
            }
            break;

        default:
            (void)snprintf_s(arp_cmd->cb_print_buf, PRINT_BUF_LEN, (PRINT_BUF_LEN - 1), "Error\n");
            goto out;
    }

out:
    if (type == ARP_OPTION_ADD || type == ARP_OPTION_DEL) {
        if (ret == ERR_MEM) {
            (void)snprintf_s(arp_cmd->cb_print_buf, PRINT_BUF_LEN, (PRINT_BUF_LEN - 1), "Out of memory error\n");
        } else if (ret == ERR_ARG) {
            (void)snprintf_s(arp_cmd->cb_print_buf, PRINT_BUF_LEN, (PRINT_BUF_LEN - 1), "Illegal argument\n");
        } else if (ret == ERR_RTE) {
            (void)snprintf_s(arp_cmd->cb_print_buf, PRINT_BUF_LEN, (PRINT_BUF_LEN - 1), "Network is unreachable\n");
        } else {
            (void)snprintf_s(arp_cmd->cb_print_buf, PRINT_BUF_LEN, (PRINT_BUF_LEN - 1), "Successed\n");
        }
    }
#endif

    sys_sem_signal(&arp_cmd->cb_completed);
}


LWIP_STATIC void lwip_arp_usage(const char *cmd)
{
    PRINTK("Usage:"\
         "\n%s"
           "\n%s [-i IF] -s IPADDR HWADDR"\
         "\n%s [-i IF] -d IPADDR\n",
           cmd, cmd, cmd);
}

u32_t lwip_arp(int argc, const char **argv)
{
    int i;
    struct arp_option arp_cmd;
    err_t ret;
    size_t interface_len = 0;

    (void)memset_s(&arp_cmd, sizeof(struct arp_option), 0, sizeof(struct arp_option));
    if (!tcpip_init_finish) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        return LOS_NOK;
    }

    arp_cmd.iface[0] = 'd';
    arp_cmd.iface[1] = 'e';
    arp_cmd.iface[2] = '0';
    arp_cmd.option = ARP_OPTION_SHOW;
    arp_cmd.print_buf_len = 0;
    if (sys_sem_new(&arp_cmd.cb_completed, 0) != ERR_OK) {
        PRINTK("%s: sys_sem_new fail\n", __FUNCTION__);
        return 1;
    }

    i = 0;
    while (argc > 0) {
        if (strcmp("-i", argv[i]) == 0 && (argc > 1)) {
            /* get the network interface's name */
            interface_len = strlen(argv[i + 1]);
            if (interface_len < IFNAMSIZ) {
                if (strncmp(argv[i + 1], "lo", (sizeof("lo") - 1)) == 0) {
                    PRINTK("Illegal operation\n");
                    goto arp_error;
                }
                if (strncpy_s(arp_cmd.iface, IFNAMSIZ, argv[i + 1], interface_len) != EOK) {
                    PRINTK("strncpy_s error\n");
                    goto arp_error;
                }
                arp_cmd.iface[interface_len] = '\0';
            } else {
                PRINTK("Iface name is big \n");
                goto arp_error;
            }
            i += 2;
            argc -= 2;
        } else if (strcmp("-d", argv[i]) == 0 && (argc > 1)) {
            /* arp delete */
            arp_cmd.option = ARP_OPTION_DEL;
            arp_cmd.ipaddr = inet_addr(argv[i + 1]);

            if (arp_cmd.ipaddr == IPADDR_NONE) {
                PRINTK("IP address is not correct!\n");
                goto arp_error;
            }

            i += 2;
            argc -= 2;
        } else if (strcmp("-s", argv[i]) == 0 && (argc > 2)) {
            /* arp add */
            char *digit = NULL;
            u32_t macaddrlen = strlen(argv[i + 2]) + 1;
            char tmpStr[MAX_MACADDR_STRING_LENGTH];
            char *tmpStr1 = NULL;
            char *saveptr1 = NULL;
            char *temp = NULL;
            int j;

            arp_cmd.option = ARP_OPTION_ADD;
            arp_cmd.ipaddr = inet_addr(argv[i + 1]);

            if (arp_cmd.ipaddr == IPADDR_NONE) {
                PRINTK("IP address is not correct!\n");
                goto arp_error;
            }

            /*cannot add an arp entry of 127.*.*.* */
            if ((arp_cmd.ipaddr & (u32_t)0x0000007fUL) == (u32_t)0x0000007fUL) {
                PRINTK("IP address is not correct!\n");
                goto arp_error;
            }

            if (macaddrlen != MAX_MACADDR_STRING_LENGTH) {
                PRINTK("Wrong MAC address length\n");
                goto arp_error;
            }

            if (strncpy_s(tmpStr, MAX_MACADDR_STRING_LENGTH, argv[i + 2], macaddrlen - 1) != 0) {
                PRINTK("Wrong MAC address\n");
                goto arp_error;
            }

            for (j = 0, tmpStr1 = tmpStr; j < 6; j++, tmpStr1 = NULL) {
                digit = strtok_r(tmpStr1, ":", &saveptr1);
                if ((digit == NULL) || (strlen(digit) > 2)) {
                    PRINTK("MAC address is not correct\n");
                    goto arp_error;
                }

                for (temp = digit; *temp != '\0'; temp++) {
                    if (!isxdigit(*temp)) {
                        PRINTK("MAC address is not correct\n");
                        goto arp_error;
                    }
                }

                CONVERT_STRING_TO_HEX(digit, arp_cmd.ethaddr[j]);
            }

            i += 3;
            argc -= 3;
        } else {
            goto arp_error;
        }
    }

    ret = tcpip_callback(lwip_arp_internal, &arp_cmd);
    if (ret != ERR_OK) {
        PRINTK("%s : tcpip_callback failed in line %d : errnu %d", __FUNCTION__, __LINE__, ret);
        sys_sem_free(&arp_cmd.cb_completed);
        return 1;
    }
    (void)sys_arch_sem_wait(&arp_cmd.cb_completed, 0);
    sys_sem_free(&arp_cmd.cb_completed);
    arp_cmd.cb_print_buf[PRINT_BUF_LEN - 1] = '\0';
    PRINTK("%s", arp_cmd.cb_print_buf);
    return 0;

arp_error:
    lwip_arp_usage("arp");
    sys_sem_free(&arp_cmd.cb_completed);
    return 1;
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(arp_shellcmd, CMD_TYPE_EX, "arp", 1, (CmdCallBackFunc)lwip_arp);
#endif /* LOSCFG_SHELL_CMD_DEBUG */

void ifup_internal(void *arg)
{
    struct netif *netif = NULL;
    struct if_cmd_data *ifcmd_data;

    ifcmd_data = (struct if_cmd_data *)arg;
    if (ifcmd_data == NULL) {
        return;
    }
    netif = netif_find(ifcmd_data->if_name);
    if (netif == NULL) {
        ifcmd_data->err = ERR_VAL;
    } else {
        (void)netif_set_up(netif);
        ifcmd_data->err = ERR_OK;
    }

    sys_sem_signal(&ifcmd_data->cb_completed);
}

void ifdown_internal(void *arg)
{
    struct netif *netif = NULL;
    struct if_cmd_data *ifcmd_data = NULL;

    ifcmd_data = (struct if_cmd_data *)arg;
    if (ifcmd_data == NULL) {
        return;
    }
    netif = netif_find(ifcmd_data->if_name);
    if (netif == NULL) {
        ifcmd_data->err = ERR_VAL;
    } else {
        (void)netif_set_down(netif);
        ifcmd_data->err = ERR_OK;
    }

    sys_sem_signal(&ifcmd_data->cb_completed);
}

#if LWIP_DNS
#ifndef LWIP_TESTBED
LWIP_STATIC
#endif
struct hostent *gethostnameinfo(const char *host)
{
    static struct hostent hostbuf;
    struct hostent *hp = NULL;
    const size_t hstbuflen = 1024;
    char tmphstbuf[1024];
    int res;
    int herr;

    res = lwip_gethostbyname_r(host, &hostbuf, tmphstbuf, hstbuflen, &hp, &herr);
    /*  Check for errors.  */
    if (res || hp == NULL)
        return NULL;
    return hp;
}

LWIP_STATIC unsigned int get_hostip(const char *hname)
{
    unsigned int ip = 0;
    int ret;

    struct hostent *pent = gethostnameinfo(hname);
    if (pent == NULL || pent->h_addr == NULL)
        return 0;
    ret = memcpy_s(&ip, sizeof(ip), pent->h_addr, 4);
    if (ret != 0) {
        return 0;
    }
    return ip;
}
#endif

#if LWIP_EXT_POLL_SUPPORT
static int ping_taskid = -1;
static int ping_kill = 0;
#define PING_ZERO_DATA_LEN 8
static void lwip_ping_usage(void)
{
    PRINTK("Usage:"\
         "\n  ping"
           "\n  ping [-n cnt] [-w interval] [-l data_len] destination"
           "\n  ping [-t] [-w interval] destination"
           "\n  ping -k");
    PRINTK("\n  -t means ping forever, user can use -k to stop the forever ping\n");
}

LWIP_STATIC int osPingFunc(u32_t destip, u32_t cnt, u32_t interval, u32_t data_len)
{
    int sfd;
    struct sockaddr_in to;
    struct pbuf *pbuf_resp = NULL;
    struct icmp_echo_hdr *iecho = NULL;
    struct icmp_echo_hdr *iecho_resp = NULL;
    struct ip_hdr *iphdr_resp = NULL;
    u32_t iecho_len;
    s16_t ip_hlen;
    u32_t forever;
    u32_t i = 0;
    u32_t succ_cnt = 0;
    u32_t failed_cnt = 0;
    struct timespec start, end;
    long timout_ms = 0;
    struct pollfd pfd;
    long rtt;
    int ret = 0;
    u32_t intrvl = 0;
    char *data_buf = NULL;
    BOOL timeout_flag = false;
    char buf[50];

    iecho_len = sizeof(struct icmp_echo_hdr) + data_len;
    sfd = lwip_socket(PF_INET, SOCK_RAW, IPPROTO_ICMP);
    if (sfd < 0) {
        perror("Ping socket");
        return -1;
    }
    pbuf_resp = pbuf_alloc(PBUF_RAW, IP_HLEN + sizeof(struct icmp_echo_hdr), PBUF_RAM);
    if (pbuf_resp == NULL) {
        PRINTK("Ping: pbuf_resp malloc failed\n");
        ret = -1;
        goto FAILURE;
    }
    iecho = (struct icmp_echo_hdr *)mem_malloc(iecho_len);
    if (iecho == NULL) {
        PRINTK("Ping: echo request malloc failed\n");
        ret = -1;
        goto FAILURE;
    }

    to.sin_family = AF_INET;
    to.sin_addr.s_addr = destip; /* already in network order */
    to.sin_port = 0;

    if (data_len > PING_ZERO_DATA_LEN) {
        (void)memset_s(iecho, sizeof(struct icmp_echo_hdr) + PING_ZERO_DATA_LEN,
                       0, sizeof(struct icmp_echo_hdr) + PING_ZERO_DATA_LEN);
        data_buf = (char *)iecho + sizeof(struct icmp_echo_hdr) + PING_ZERO_DATA_LEN;
        for (i = 0; i < data_len - PING_ZERO_DATA_LEN; i++) {
            *(data_buf + i) = i + 0x10;
        }
    } else {
        (void)memset_s(iecho, sizeof(struct icmp_echo_hdr) + data_len, 0, sizeof(struct icmp_echo_hdr) + data_len);
    }
    iecho->id = htons((u16_t)LOS_CurTaskIDGet());
    ICMPH_TYPE_SET(iecho, (u8_t)ICMP_ECHO);
    forever = (cnt ? 0 : 1);
    i = 0;
    while (!ping_kill && (forever || (i < cnt))) {
        iecho->seqno = htons((u16_t)i);
        iecho->chksum = 0;
        iecho->chksum = inet_chksum((void *)iecho, iecho_len);

        ret = sendto(sfd, iecho, iecho_len, 0, (struct sockaddr *)&to, (socklen_t)sizeof(to));
        if (ret < 0) {
            perror("Ping: sending ICMP echo request failed\n");
            goto FAILURE;
        }

        /* capture the start time to calculate RTT */
        (void)clock_gettime(CLOCK_MONOTONIC_RAW, &start);

        /* poll for ICMP echo response msg */
        pfd.fd = sfd;

        do {
            pfd.events = POLLIN;
            pfd.revents = 0;
            timeout_flag = false;
            ret = poll(&pfd, 1, LWIP_SHELL_CMD_PING_TIMEOUT);
            if (ret < 0) {
                perror("Ping: poll\n");
                goto FAILURE;
            } else if (ret == 0) {
                /* first type timeout event */
                timeout_flag = true;
                break;
            }

            ret = recv(sfd, pbuf_resp->payload, pbuf_resp->len, MSG_DONTWAIT);
            if (ret < 0) {
                perror("Ping: recv echo reply failed\n");
                goto FAILURE;
            }

            /* Accessing ip header and icmp header */
            iphdr_resp = pbuf_resp->payload;

            ip_hlen = (IPH_HL(iphdr_resp) << 2);
            if (pbuf_header(pbuf_resp, -ip_hlen)) {
                /* this failure will never happen, but failure handle is written just to be in safe side */
                PRINTK("Ping : memory management failure\n");
                goto FAILURE;
            }
            iecho_resp = (struct icmp_echo_hdr *)pbuf_resp->payload;
            /* Reverting back pbuf to its original state */
            if (pbuf_header(pbuf_resp, ip_hlen)) {
                /* this failure will never happen, but failure handle is written just to be in safe side */
                PRINTK("ping : memory management failure\n");
                goto FAILURE;
            }

            if ((iphdr_resp->src.addr != to.sin_addr.s_addr) ||
                ((ICMPH_TYPE(iecho_resp) == ICMP_ECHO) && (iphdr_resp->src.addr == to.sin_addr.s_addr))) {
                /* second type timeout event */
                (void)clock_gettime(CLOCK_MONOTONIC_RAW, &end);
                timout_ms = ((end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000);
                timout_ms = LWIP_SHELL_CMD_PING_TIMEOUT - timout_ms;
            } else {
                timout_ms = 0;
                break;
            }
        } while (timout_ms >= 0);

        /* all timeout events are true timeout */
        if ((timout_ms < 0) || (timeout_flag == true)) {
            failed_cnt++;
            i++;
            PRINTK("\nPing: destination unreachable ...");
            continue;
        }
        /* capture the end time to calculate round trip time */
        (void)clock_gettime(CLOCK_MONOTONIC_RAW, &end);
        rtt = ((end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000);

        if (iphdr_resp->src.addr == to.sin_addr.s_addr) {
            switch (ICMPH_TYPE(iecho_resp)) {
                case ICMP_ER:
                    PRINTK("\n[%u]Reply from %s: ", i, inet_ntop(AF_INET, &to.sin_addr, buf, sizeof(buf)));
                    if (rtt > 0) {
                        PRINTK("time=%ims ", rtt);
                    } else {
                        PRINTK("time<1ms ");
                    }
                    PRINTK("TTL=%u", iphdr_resp->_ttl);

                    /* delay 1s for every successful ping */
                    intrvl = interval;
                    do {
                        if (intrvl < 1000) {
                            sys_msleep(intrvl);
                            break;
                        }
                        intrvl -= 1000;
                        sys_msleep(1000);
                        if (ping_kill == 1)
                            break;
                    } while (intrvl > 0);
                    succ_cnt++;
                    break;
                case ICMP_DUR:
                    PRINTK("\nPing: destination host unreachable ...");
                    break;
                case ICMP_SQ:
                    PRINTK("\nPing: source quench ...");
                    break;
                case ICMP_RD:
                    PRINTK("\nPing: redirect ...");
                    break;
                case ICMP_TE:
                    PRINTK("\nPing: time exceeded ...");
                    break;
                case ICMP_PP:
                    PRINTK("\nPing: parameter problem ...");
                    break;
                default :
                    PRINTK("\nPing: unknow error ...");
                    break;
            }
            i++;
        }
    }

    PRINTK("\n--- %s ping statistics ---\n", inet_ntop(AF_INET, &to.sin_addr, buf, sizeof(buf)));
    PRINTK("%u packets transmitted, %u received, %u loss\n", i, succ_cnt, failed_cnt);

FAILURE:
    ping_kill = 0;
    (void)lwip_close(sfd);
    if (pbuf_resp != NULL) {
        (void)pbuf_free(pbuf_resp);
    }
    if (iecho != NULL) {
        mem_free(iecho);
    }
    return ret;
}

static void ping_cmd(unsigned int p0, unsigned int p1, unsigned int p2, unsigned int p3)
{
    u32_t destip = p0;
    u32_t count = p1;
    u32_t interval = p2;
    u32_t data_len = p3;
    int ret;

    ret = osPingFunc(destip, count, interval, data_len);
    if (ret < 0) {
        PRINTK("Ping cmd failed due to some errors\n");
    }

    ping_taskid = -1;
}

u32_t osShellPing(int argc, const char **argv)
{
    int ret;
    u32_t i = 0;
    u32_t count = 0;
    int count_set = 0;
    u32_t interval = 1000; /* default ping interval */
    u32_t data_len = 48; /* default data length */
    ip4_addr_t dst_ipaddr;
    TSK_INIT_PARAM_S stPingTask;

    if (!tcpip_init_finish) {
        PRINTK("Ping: tcpip_init have not been called\n");
        return LOS_NOK;
    }

    if ((argc < 1) || (argv == NULL)) {
        PRINTK("Ping: require dest ipaddr at least\n");
        goto ping_error;
    }

    /* could add more param support */
    while (argc > 0) {
        if (strcmp("-n", argv[i]) == 0 && (argc > 1)) {
            ret = atoi(argv[i + 1]);
            if (ret <= 0) {
                PRINTK("Ping count should be greater than 0 \n");
                goto ping_error;
            }
            count = ret;
            count_set = 1;
            i += 2;
            argc -= 2;
        } else if (strcmp("-t", argv[i]) == 0) {
            count = 0; /* ping forerver */
            count_set = 1;
            i++;
            argc--;
        } else if (strcmp("-w", argv[i]) == 0 && (argc > 1)) {
            ret = atoi(argv[i + 1]);
            if (ret <= 0) {
                PRINTK("Ping interval should be greater than 0 \n");
                goto ping_error;
            }

            interval = ret;
            i += 2;
            argc -= 2;
        } else if (strcmp("-l", argv[i]) == 0 && (argc > 1)) {
            ret = atoi(argv[i + 1]);
            if (ret < 0 || ret > (int)(LWIP_MAX_UDP_RAW_SEND_SIZE - sizeof(struct icmp_echo_hdr))) {
                PRINTK("Ping data length error, should be in range of [0, %d] \n",
                       LWIP_MAX_UDP_RAW_SEND_SIZE - sizeof(struct icmp_echo_hdr));
                goto ping_error;
            }
            data_len = ret;
            i += 2;
            argc -= 2;
        } else if (strcmp("-k", argv[i]) == 0) {
            if (ping_taskid > 0) {
                ping_kill = 1; /* stop the current ping task */
                return LOS_OK;
            } else {
                PRINTK("No ping task running...\n");
                return LOS_NOK;
            }
        } else {
            if (argc == 1) {
                break;
            } else {
                PRINTK("Invalid Ping param\n");
                goto ping_error;
            }
        }
    }

    if (!count_set) {
        count = LWIP_SHELL_CMD_PING_RETRY_TIMES;
    }

    /* initialize dst IP address */
    if (argc <= 0) {
        goto ping_error;
    }
#if LWIP_DNS
    dst_ipaddr.addr = get_hostip(argv[i]);
#else /* LWIP_DNS */
    dst_ipaddr.addr = inet_addr(argv[i]);
#endif /* LWIP_DNS */

    if (dst_ipaddr.addr == IPADDR_NONE || dst_ipaddr.addr == IPADDR_ANY) {
        PRINTK("Invalid dest ipaddr: NONE or ANY\n");
        return LOS_NOK;
    }

    /* start one task if ping forever or ping count greater than 60 */
    if (count == 0 || count > LWIP_SHELL_CMD_PING_RETRY_TIMES) {
        if (ping_taskid > 0) {
            PRINTK("Ping task already running and only support one now\n");
            return LOS_NOK;
        }
        stPingTask.pfnTaskEntry = (TSK_ENTRY_FUNC)ping_cmd;
        stPingTask.uwStackSize = LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE;
        stPingTask.pcName = "ping_task";
        stPingTask.usTaskPrio = 8; /* higher than shell */
        stPingTask.uwResved = LOS_TASK_STATUS_DETACHED;
        stPingTask.auwArgs[0] = dst_ipaddr.addr; /* network order */
        stPingTask.auwArgs[1] = count;
        stPingTask.auwArgs[2] = interval;
        stPingTask.auwArgs[3] = data_len;
        ret = LOS_TaskCreate((UINT32 *)(&ping_taskid), &stPingTask);
        if (ret != LOS_OK) {
            PRINTK("ping_task create failed 0x%08x.\n", ret);
            count = LWIP_SHELL_CMD_PING_RETRY_TIMES;
        } else {
            return LOS_OK;
        }
    }

    /* two cases:
     1, ping cout less than LWIP_SHELL_CMD_PING_RETRY_TIMES;
     2, ping task create failed;
    */
    if (osPingFunc(dst_ipaddr.addr, count, interval, data_len) < 0) {
        PRINTK("Ping cmd failed due some errors\n");
    }

    return LOS_OK;
ping_error:
    lwip_ping_usage();
    return LOS_NOK;
}
#ifdef LOSCFG_SHELL
SHELLCMD_ENTRY(ping_shellcmd, CMD_TYPE_EX, "ping", XARGS, (CmdCallBackFunc)osShellPing);
#endif /* LOSCFG_SHELL */

#else /* LWIP_EXT_POLL_SUPPORT*/

u32_t osShellPing(int argc, const char **argv)
{
    int sfd;
    struct sockaddr_in to;
    struct icmp_echo_hdr iecho;
    struct pbuf *pbuf_resp = NULL;
    struct icmp_echo_hdr *iecho_resp = NULL;
    struct ip_hdr *iphdr_resp = NULL;
    s16_t ip_hlen;
    ip_addr_t dst_ipaddr;
    fd_set fdReadSet;
    struct timeval stTimeVal;
    struct timespec start, end;
    int ret;
    s32_t i;
    long rtt;
    s32_t pingcount;
    char buf[50];

    if (!tcpip_init_finish) {
        PRINTK("ping: tcpip_init have not been called\n");
        return LOS_NOK;
    }

    if ((argc < 1) || (argv == NULL)) {
        PRINTK("ping : invalid arguments, ping command receives ip as command line argument \n");
        return LOS_NOK;
    }

    if (argc == 2) {
        pingcount = atoi(argv[1]);
        if (pingcount < 1)
            pingcount = LWIP_SHELL_CMD_PING_RETRY_TIMES;
    } else {
        pingcount = LWIP_SHELL_CMD_PING_RETRY_TIMES;
    }
    PRINTK("ping %u packets start.\n", pingcount);

    /* initialize dst IP address */
#if LWIP_DNS
    ip_2_ip4(&dst_ipaddr)->addr = get_hostip(argv[0]);
#else /* LWIP_DNS */
    ip_2_ip4(&dst_ipaddr)->addr = inet_addr(argv[0]);
#endif /* LWIP_DNS */

    to.sin_family = AF_INET;
    to.sin_addr.s_addr = ip_2_ip4(&dst_ipaddr)->addr;
    to.sin_port = 0;

    if (to.sin_addr.s_addr == IPADDR_NONE || to.sin_addr.s_addr == IPADDR_ANY) {
        PRINTK("ping : invalid ip address : NONE or ANY\n");
        return LOS_NOK;
    }

    sfd = lwip_socket(PF_INET, SOCK_RAW, IPPROTO_ICMP);
    if (sfd == -1) {
        PRINTK("ping : failed, socket creation failed\n");
        return LOS_NOK;
    }

    pbuf_resp = pbuf_alloc(PBUF_RAW, IP_HLEN + sizeof(struct icmp_echo_hdr), PBUF_RAM);
    if (pbuf_resp == NULL) {
        PRINTK("ping : memory allocation failed\n");
        goto FAILURE;
    }

    for (i = 0; i < pingcount; i++) {
        (void)memset_s(&iecho, sizeof(iecho), 0, sizeof(iecho));
        ICMPH_TYPE_SET(&iecho, (u8_t)ICMP_ECHO);
        iecho.chksum = inet_chksum(&iecho, sizeof(struct icmp_echo_hdr));

        ret = lwip_sendto(sfd, &iecho, sizeof(struct icmp_echo_hdr), 0, (struct sockaddr *)&to, (socklen_t)sizeof(to));
        if (ret == -1) {
            PRINTK("ping : sending ICMP echo msg failed\n");
            goto FAILURE;
        }

        /* capture the start time to calculate round trip time */
        (void)clock_gettime(CLOCK_MONOTONIC_RAW, &start);
        /* Wait in select for ICMP response msg */
        FD_ZERO(&fdReadSet);
        FD_SET(sfd, &fdReadSet);
        stTimeVal.tv_sec = LWIP_SHELL_CMD_PING_TIMEOUT / 1000;
        stTimeVal.tv_usec = 0;

DO_SELECT:
        ret = select(sfd + 1, &fdReadSet, 0, 0, &stTimeVal);
        if (ret < 0) {
            PRINTK("ping : select failure\n");
            goto FAILURE;
        } else if (ret == 0) {
            PRINTK("Request timed out.\n");
            continue;
        }

        /* capture the end time to calculate round trip time */
        (void)clock_gettime(CLOCK_MONOTONIC_RAW, &end);
        rtt = ((end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000);

        ret = lwip_recv(sfd, pbuf_resp->payload, pbuf_resp->len, 0);
        if (ret == -1) {
            PRINTK("ping : receiving ICMP echo response msg failed\n");
            goto FAILURE;
        }

        /* Accessing ip header and icmp header */
        iphdr_resp = (struct ip_hdr *)(pbuf_resp->payload);
        ip_hlen = (s16_t)(IPH_HL(iphdr_resp) * 4);
        if (pbuf_header(pbuf_resp, (s16_t)(-ip_hlen))) {
            /* this failure will never happen, but failure handle is written just to be in safe side */
            PRINTK("ping : memory management failure\n");
            goto FAILURE;
        }
        iecho_resp = (struct icmp_echo_hdr *)pbuf_resp->payload;

        /* Reverting back pbuf to its original state */
        if (pbuf_header(pbuf_resp, ip_hlen)) {
            /* this failure will never happen, but failure handle is written just to be in safe side */
            PRINTK("ping : memory management failure\n");
            goto FAILURE;
        }

        if (iphdr_resp->src.addr == to.sin_addr.s_addr) {
            if (ICMPH_TYPE(iecho_resp) == ICMP_ER) {
                PRINTK("[%u]Reply from %s: time=%ims TTL=%u\n", i,
                       inet_ntoa_r(to.sin_addr.s_addr, buf, sizeof(buf)), rtt, iphdr_resp->_ttl);
            } else if (ICMPH_TYPE(iecho_resp) == ICMP_ECHO) {
                /* If ping self, stack will receive a ICMP_ECHO request message flowing a ICMP_ER reply message,
                    and we need reply only, do select again */
                goto DO_SELECT;
            }
        }
    }

    (void)lwip_close(sfd);
    (void)pbuf_free(pbuf_resp);
    return LOS_OK;

FAILURE:
    (void)lwip_close(sfd);
    if (pbuf_resp != NULL) {
        (void)pbuf_free(pbuf_resp);
    }

    return LOS_NOK;
}

#ifdef LOSCFG_SHELL
SHELLCMD_ENTRY(ping_shellcmd, CMD_TYPE_EX, "ping", XARGS, (CmdCallBackFunc)osShellPing);
#endif /* LOSCFG_SHELL */

#endif /* LWIP_EXT_POLL_SUPPORT*/

#if LWIP_IPV6
u32_t osShellPing6(int argc, const char **argv)
{
    u16_t icmpv6_id;
    u16_t icmpv6_seq;
    u32_t nsent;
    u32_t nrecieve;
    u32_t last_recieved;
    struct timespec start, end, start_in_reply;
    struct timespec first, last;
    long rtt;
    int ret;
    fd_set fdReadSet;
    void *param = NULL;
    ping6_args_t ping6_params;
    ping6_stats_t ping6_stats;
    struct sockaddr_in6 to;
    struct icmp6_echo_hdr *iecho_resp = NULL;
    struct icmp6_echo_hdr *iecho = NULL;
    struct timeval stTimeVal;
    struct timeval deltaTimeVal;
    struct pbuf *pbuf_resp = NULL;
    struct pbuf *pbuf_req = NULL;
    int sfd = -1;
    u8_t type;
    u8_t select_on_socket = 0;
    char buf[INET6_ADDRSTRLEN];

    if (!tcpip_init_finish) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        ret = -1;
        goto exit;
    }

    if ((argc < 1) || (argc > LWIP_MAX_PING6_ARG_COUNT) || (argv == NULL)) {
        goto usage;
    }

    ret = parse_args_ping6(argc, argv, &ping6_params);
    if (ret == -1) {
        goto exit;
    }

    if (ping6_params.args_found & LWIP_PING6_SOURCE_ADDRESS_ARG) {
        type = LWIP_PING6_SOURCE_ADDRESS_ARG;
        param = (void *)(&ping6_params.src_addr);
    } else if (ping6_params.args_found & LWIP_PING6_INTERFACE_ARG) {
        type = LWIP_PING6_INTERFACE_ARG;
        param = (void *)(argv[ping6_params.interface_index]);
    } else {
        type = LWIP_PING6_DEFAULT_SOCKET;
        param = NULL;
    }

    /* Create a socket for sending and receiving pings with appropriate bindings */
    sfd = create_ping6_socket(type, param);
    if (sfd == -1) {
        ret = -1;
        goto exit;
    }

    pbuf_req = pbuf_alloc(PBUF_RAW, LWIP_PING6_STANDARD_PKT_SIZE, PBUF_RAM);
    pbuf_resp = pbuf_alloc(PBUF_RAW, LWIP_PING6_STANDARD_PKT_SIZE, PBUF_RAM);
    if ((pbuf_resp == NULL) || (pbuf_req == NULL)) {
        PRINTK("ping6 : Memory Allocation Failed\n");
        ret = -1;
        goto exit;
    }

    to.sin6_family = AF_INET6;
    inet6_addr_from_ip6addr(&to.sin6_addr, &(ping6_params.dst_addr));
    to.sin6_port = htons(IPPROTO_ICMPV6);

#if LWIP_DNS
    if (lwip_strnicmp(inet_ntop(AF_INET6, &to.sin6_addr, buf, sizeof(buf)), argv[ping6_params.host_index],
                      sizeof(to.sin6_addr))) {
        /* If There Was A DNS Resolution */
        PRINTK("PING %s (%s) with %d bytes of data.\n",
               argv[ping6_params.host_index], buf, LWIP_PING6_STANDARD_PKT_SIZE);
    } else {
        PRINTK("PING %s with %d bytes of data.\n", buf, LWIP_PING6_STANDARD_PKT_SIZE);
    }
#else
    PRINTK("PING %s with %d bytes of data\n", inet_ntop(AF_INET6, &to.sin6_addr, buf, sizeof(buf)), LWIP_PING6_STANDARD_PKT_SIZE);
#endif /* LWIP_DNS */

    nrecieve = 0;
    ping6_stats.flag = 0;
    ping6_stats.avg_rtt = 0;
    ping6_stats.max_rtt = 0;
    ping6_stats.min_rtt = 0;
    last_recieved = LWIP_PING6_STARTING_SEQ_NUM + LWIP_PING6_OUT_OF_ORDER_MAGNITUDE + 1;
    icmpv6_id = (u16_t)LWIP_RAND();
    icmpv6_seq = LWIP_PING6_STARTING_SEQ_NUM;
    /* Setting the start time of the entire ping task for statistics */
    (void)clock_gettime(CLOCK_MONOTONIC_RAW, &first);

    nsent = 0;

    for (nsent = 0; nsent < ping6_params.pingcount; nsent++) {
        /* capture the start tick to calculate rtt */
        (void)clock_gettime(CLOCK_MONOTONIC_RAW, &start);
        /* Initialize Memory To Prevent Unintialized Memory Read Write Issues */
        if (memset_s(pbuf_req->payload, pbuf_req->len, (int)(start.tv_nsec), pbuf_req->len) != 0) {
            goto exit;
        }

        iecho = (struct icmp6_echo_hdr *)pbuf_req->payload;
        iecho->type = ICMP6_TYPE_EREQ;
        iecho->id = icmpv6_id;
        icmpv6_seq++;
        iecho->seqno = icmpv6_seq;
        iecho->code = 0;

        /* Embedding the start_tick as data into the icmp_payload */
        (void)pbuf_header(pbuf_req, (s16_t)(-(s16_t)(sizeof(struct icmp6_echo_hdr))));
        if (memcpy_s(pbuf_req->payload, pbuf_req->len, (void *)&start, sizeof(start)) != 0) {
            goto exit;
        }
        (void)pbuf_header(pbuf_req, (s16_t)((s16_t)(sizeof(struct icmp6_echo_hdr))));

        ret = lwip_sendto(sfd, iecho, pbuf_req->len, 0, (struct sockaddr *)&to, (socklen_t)sizeof(to));
        if (ret == -1) {
            PRINTK("ping6 : Sending ICMP Echo message failed\n");
            goto exit;
        }

        /* Wait in select for ICMP response msg */
        FD_ZERO(&fdReadSet);
        FD_SET(sfd, &fdReadSet);
        stTimeVal.tv_sec = LWIP_MSECS_TO_SECS(LWIP_SHELL_CMD_PING_TIMEOUT);
        stTimeVal.tv_usec = 0;
        select_on_socket = 1;

        while (select_on_socket) {
            select_on_socket = 0;
            ret = select(sfd + 1, &fdReadSet, 0, 0, &stTimeVal);
            if (ret < 0) {
                PRINTK("ping6 : select failure\n");
                goto exit;
            } else if (ret == 0) {
                (void)clock_gettime(CLOCK_MONOTONIC_RAW, &end);
                PRINTK("Request timed out\n");
                continue;
            }

            /* capture the end time to calculate round trip time */
            (void)clock_gettime(CLOCK_MONOTONIC_RAW, &end);

            ret = lwip_recv(sfd, pbuf_resp->payload, pbuf_resp->len, 0);
            if (ret == -1) {
                PRINTK("ping6 : receiving ICMP echo response msg failed\n");
                goto exit;
            }

            if ((u32_t)ret < sizeof(struct icmp6_echo_hdr *)) {
                /* Drop the packet if its too short [Doesnot contain even the header !!] */
                PRINTK("ping6 : received ICMP echo response too short\n");
                goto REDUCE_SELECT_TIME;
            }

            /* Acceping the ICMPv6 payload. */
            /* Here, pbuf_resp->payload wont contain IPv6 Header since its an AF_INET6 RAW Socket */
            iecho_resp = (struct icmp6_echo_hdr *)pbuf_resp->payload;

            if (iecho_resp->id == icmpv6_id) {
                if (iecho_resp->type == ICMP6_TYPE_EREP) {
                    if (ret < LWIP_PING6_STANDARD_PKT_SIZE) {
                        /* Drop the packet if its too short */
                        PRINTK("ping6 : received ICMP echo response too short\n");
                        goto REDUCE_SELECT_TIME;
                    }
                    /* Accept and process only those delayed EREP only if its sequence num is within out-of-order magnitude */
                    if (nsent && iecho_resp->seqno != icmpv6_seq &&
                        (iecho_resp->seqno<(u16_t)(last_recieved - LWIP_PING6_OUT_OF_ORDER_MAGNITUDE) ||
                                           iecho_resp->seqno>(u16_t)(
                            last_recieved + LWIP_PING6_OUT_OF_ORDER_MAGNITUDE))) {
                        /* Otherwise drop it and wait for more packets */
                        goto REDUCE_SELECT_TIME;
                    }
                    ++nrecieve;
                    last_recieved = iecho_resp->seqno;
                    /* Retrieving the start_tick from the packet which was embedded when the request was transmitted */
                    (void)pbuf_header(pbuf_resp, (s16_t)(-(s16_t)(sizeof(struct icmp6_echo_hdr))));
                    if (memcpy_s((void *)&start_in_reply, sizeof(start_in_reply),
                                 pbuf_resp->payload, sizeof(start_in_reply)) != EOK) {
                        goto REDUCE_SELECT_TIME;
                    }
                    (void)pbuf_header(pbuf_resp, (s16_t)((s16_t)(sizeof(struct icmp6_echo_hdr))));

                    rtt = ((end.tv_sec - start.tv_sec) * 1000 + (end.tv_nsec - start.tv_nsec) / 1000000);

                    PRINTK("%d bytes from %s : icmp_seq=%d time", ret,
                           inet_ntop(AF_INET6, &to.sin6_addr, buf, sizeof(buf)),
                           ((iecho_resp->seqno) - LWIP_PING6_STARTING_SEQ_NUM));
                    if (rtt < 1) {
                        PRINTK("<1 ms\n");
                    } else {
                        PRINTK("=%i ms\n", rtt);
                    }

                    update_ping6_stats(&ping6_stats, (u32_t)(rtt), nrecieve);

                    /* Checking if its a delayed packet */
                    if ((iecho_resp->seqno != icmpv6_seq) && (nsent < ping6_params.pingcount)) {
                        /* Incase of delayed packet wait on socket for other response before sending a new PING */
                        /* We have to reduce the timeout value now when selecting on socket */
                        goto REDUCE_SELECT_TIME;
                    }
                } else {
                    PRINTK("[%u]ping6 : %s\n", nsent, convert_icmpv6_err_to_string(iecho_resp->type));
                }
            } else {
                /* If incoming packet does not matches with icmp_id, it should be ignored  */
                /* Reduce the timeout for select on socket */
REDUCE_SELECT_TIME:
                deltaTimeVal.tv_sec = (long)(end.tv_sec - start.tv_sec);
                deltaTimeVal.tv_usec = (long)((end.tv_nsec - start.tv_nsec) / 1000);
                /* Subtract deltaTime from stTime and store in stTime */
                /* This will reduce the select time on the socket */
                timersub(&stTimeVal, &deltaTimeVal, &stTimeVal);
                select_on_socket = 1;
            }
        }
    }

    ret = ERR_OK;

    (void)clock_gettime(CLOCK_MONOTONIC_RAW, &last);
    /* Display ping stats */
    PRINTK("--- %s ping statistics ---\n", argv[ping6_params.host_index]);
    PRINTK("%d packets transmitted, %d received, %.2f%% packet loss, time %dms\n",
           nsent, nrecieve, (float)(((float)(nsent - nrecieve)) * ((float)(100)) / ((float)(nsent))),
           ((last.tv_sec - first.tv_sec) * 1000 + (last.tv_nsec - first.tv_nsec) / 1000000));
    if (nrecieve) {
        /* Display rtt stats only if atleast one packet is recieved */
        PRINTK("rtt min/avg/max = %u/%.2f/%u ms\n", ping6_stats.min_rtt, ping6_stats.avg_rtt, ping6_stats.max_rtt);
    }

exit:
    if (sfd != -1) {
        (void)lwip_close(sfd);
    }

    if (pbuf_resp != NULL) {
        (void)pbuf_free(pbuf_resp);
    }

    if (pbuf_req != NULL) {
        (void)pbuf_free(pbuf_req);
    }
    return (u32_t)((ret == (int)ERR_OK) ? LOS_OK : LOS_NOK);

usage:
    PRINTK("Usage:\n");
    PRINTK("\tping6 [-c count] [-I interface/sourceAddress] destination\n");
    return LOS_NOK;
}

LWIP_STATIC int create_ping6_socket(u8_t type, const void *param)
{
    int sfd;
    int ret;
    struct sockaddr_in6 stHostAddr6;
    struct icmp6_filter icmp6_sock_filter;

    sfd = lwip_socket(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
    if (sfd == -1) {
        PRINTK("ping6 : Failed, socket creation failed\n");
        return -1;
    }

    if (param != NULL) {
        if (type == LWIP_PING6_SOURCE_ADDRESS_ARG) {
            /* Binding socket to the provided source address */
            (void)memset_s(&stHostAddr6, sizeof(stHostAddr6), 0, sizeof(stHostAddr6));
            stHostAddr6.sin6_family = AF_INET6;
            inet6_addr_from_ip6addr(&stHostAddr6.sin6_addr, (ip6_addr_t *)param);
            stHostAddr6.sin6_port = htons(IPPROTO_ICMPV6);
            stHostAddr6.sin6_scope_id = 0;

            ret = lwip_bind(sfd, (struct sockaddr *)&stHostAddr6, sizeof(stHostAddr6));
            if (ret == -1) {
                (void)lwip_close(sfd);
                PRINTK("ping6 : bind icmp socket: cannot assign requested address\n");
                return ret;
            }
        } else if (type == LWIP_PING6_INTERFACE_ARG) {
            /* Binding socket to the provided netif */
            ret = lwip_setsockopt(sfd, SOL_SOCKET, SO_BINDTODEVICE, (char *)(param), strlen((char *)(param)));
            if (ret == -1) {
                (void)lwip_close(sfd);
                PRINTK("ping6: unknown iface %s\n", (char *)(param));
                return ret;
            }
        }
    }

    /* Setting socket filter since we are interested only in ECHO REPLY and ERROR messages */
    ICMP6_FILTER_SETBLOCKALL (&icmp6_sock_filter);
    ICMP6_FILTER_SETPASS (ICMP6_TYPE_EREP, &icmp6_sock_filter);
    ICMP6_FILTER_SETPASS (ICMP6_TYPE_DUR, &icmp6_sock_filter);
    ICMP6_FILTER_SETPASS (ICMP6_TYPE_PTB, &icmp6_sock_filter);
    ICMP6_FILTER_SETPASS (ICMP6_TYPE_TE, &icmp6_sock_filter);

    ret = lwip_setsockopt(sfd, IPPROTO_ICMPV6, ICMP6_FILTER, &icmp6_sock_filter, sizeof(struct icmp6_filter));
    if (ret == -1) {
        (void)lwip_close(sfd);
        PRINTK("ping6 : setsockopt: Invalid Argument\n");
        return -1;
    }

    return sfd;
}

/*
 * Function to parse the command line args for ping6 shell utility
 * @return:
 *   Success: ERR_OK
 *   Failure: -1
 */
LWIP_STATIC int parse_args_ping6(int argc, const char **argv, ping6_args_t *ping6_params)
{
    int pingcount;
    int ret = -1;
#if LWIP_DNS
    struct addrinfo *res = NULL;
    struct addrinfo hints_structure;
#endif
    u8_t i = 0;

    IP6_ADDR(&(ping6_params->dst_addr), 0, 0, 0, 0);
    IP6_ADDR(&(ping6_params->src_addr), 0, 0, 0, 0);

    ping6_params->pingcount = LWIP_SHELL_CMD_PING_RETRY_TIMES;
    ping6_params->host_index = 0;
    ping6_params->args_found = 0;

    while (i < argc) {
        if (strcmp("-c", argv[i]) == 0) {
            /* Handle number of ICMP packets to transmit :: -c [number_of_packets] */
            if (ping6_params->args_found & LWIP_PING6_COUNT_ARG) {
                PRINTK("ping6: -c option present multiple times \n");
                ret = -1;
                goto exit;
            }

            if (i + 2 > argc) {
                PRINTK("ping6: ping count(-c) should require an argument \n");
                ret = -1;
                goto exit;
            }

            pingcount = atoi(argv[i + 1]);
            if (pingcount <= 0) {
                PRINTK("ping6: bad number of packets to transmit \n");
                ret = -1;
                goto exit;
            }

            ping6_params->args_found |= LWIP_PING6_COUNT_ARG;
            ping6_params->pingcount = (u32_t)pingcount;
            i = (u8_t)(i + 2);
        } else if (strcmp("-I", argv[i]) == 0) {
            /* Handle interface ID / sourceAddress using which the ICMP Packets has to be transmitted :: -I [interface_id/source_address] */

            if ((ping6_params->args_found & LWIP_PING6_SOURCE_ADDRESS_ARG) ||
                (ping6_params->args_found & LWIP_PING6_INTERFACE_ARG)) {
                PRINTK("ping6: -I option present multiple times \n");
                ret = -1;
                goto exit;
            }

            if (i + 2 > argc) {
                PRINTK("ping6: interface/source address(-I) should require an argument \n");
                ret = -1;
                goto exit;
            }

            /* Check whether the given argument to -I is source address */
            if (ip6addr_aton(argv[i + 1], &(ping6_params->src_addr))) {
                ping6_params->args_found |= LWIP_PING6_SOURCE_ADDRESS_ARG;
                i = (u8_t)(i + 2);
                continue;
            }

            /* Storing the index where interface name is found */
            /* If this name is not valid, then it will fail later in setsockopt(BIND_TO_DEVICE) */
            ping6_params->interface_index = (u8_t)(i + 1);
            ping6_params->args_found |= LWIP_PING6_INTERFACE_ARG;

            i = (u8_t)(i + 2);
        } else {
            if (argv[i][0] == '-') {
                /* Check whether its a bad option */
                PRINTK("ping6: bad option %s\n", argv[i]);
                ret = -1;
                goto exit;
            } else if (ping6_params->args_found & LWIP_PING6_HOSTNAME_ARG) {
                /* Check whether hostname is already found and there are extra arguments */
                PRINTK("ping6: bad parameter %s\n", argv[i]);
                ret = -1;
                goto exit;
            }

#if LWIP_DNS
            /* Resolve the given hostname */
            hints_structure.ai_family = AF_INET6;
            hints_structure.ai_flags = 0;
            ret = lwip_getaddrinfo(argv[i], NULL, &hints_structure, &res);
            if (ret != ERR_OK) {
                PRINTK("ping6 : Host : %s can't be resolved to IPv6 address\n", argv[i]);
                ret = -1;
                goto exit;
            }

            inet6_addr_to_ip6addr(&(ping6_params->dst_addr),
                                  &(((const struct sockaddr_in6 *)(res->ai_addr))->sin6_addr));
#else
            /* Convert the string representation to network form */
            if (!ip6addr_aton(argv[i], &(ping6_params->dst_addr))) {
                PRINTK("ping6 : Invalid IPv6 Address : %s\n", argv[i]);
                ret = -1;
                goto exit;
            }
#endif /* LWIP_DNS */
            if (ip6_addr_isany(&(ping6_params->dst_addr)) || ip6_addr_isnone(&(ping6_params->dst_addr))) {
#if LWIP_DNS
                PRINTK("ping6 : IPv6 address of host : %s (%s) is invalid\n", argv[i],
                       ip6addr_ntoa((const ip6_addr_t *)&(ping6_params->dst_addr)));
#else
                PRINTK("ping6 : Invalid IPv6 address : %s\n", argv[i]);
#endif /* LWIP_DNS */
                goto exit;
            }
            /* Setting host_index to the index of argv[] where the host/IP is present */
            ping6_params->args_found |= LWIP_PING6_HOSTNAME_ARG;
            ping6_params->host_index = (u8_t)(i);
            i = (u8_t)(i + 1);
        }
    }

    if (!(ping6_params->args_found & LWIP_PING6_HOSTNAME_ARG)) {
        /* Hostname/IPv6 address not found */
        PRINTK("ping6 : Hostname/IPv6 address to ping is not specified\n");
        ret = -1;
        goto exit;
    }

    if (ip6_addr_islinklocal(&(ping6_params->dst_addr)) &&
        !(ping6_params->args_found & (LWIP_PING6_INTERFACE_ARG | LWIP_PING6_SOURCE_ADDRESS_ARG))) {
        /* For link-local addresses, -I is mandatory */
        PRINTK("ping6 : Interface specification is mandatory for link-local addresses\n");
        ret = -1;
        goto exit;
    }

    ret = ERR_OK;

exit:
#if LWIP_DNS
    lwip_freeaddrinfo(res);
#endif /* LWIP_DNS */

    return ret;
}

/*
 * Function to update ping6_stats
 * stats is maintained in ping6_stats structure
 */
LWIP_STATIC void update_ping6_stats(ping6_stats_t *ping6_stats, u32_t rtt, u32_t nrecieved)
{
    if (rtt > ping6_stats->max_rtt) {
        ping6_stats->max_rtt = rtt;
    }

    if (ping6_stats->flag == 0 || rtt < ping6_stats->min_rtt) {
        ping6_stats->min_rtt = rtt;
        ping6_stats->flag = 1;
    }

    ping6_stats->avg_rtt = (float)(ping6_stats->avg_rtt +
                                   (float)((float)((float)rtt - ping6_stats->avg_rtt) / (float)(nrecieved)));
}

LWIP_STATIC const char *convert_icmpv6_err_to_string(u8_t err_type)
{
    switch (err_type) {
        case ICMP6_TYPE_DUR:
            return "Destination Unreachable";
        case ICMP6_TYPE_PTB:
            return "Packet too big";
        case ICMP6_TYPE_TE:
            return "Time Exceeded";
        case ICMP6_TYPE_PP:
            return "Parameter Problem";
        default:
            break;
    }
    return "Unknown Error";
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(ping6_shellcmd, CMD_TYPE_EX, "ping6", XARGS, (CmdCallBackFunc)osShellPing6);
#endif /* LOSCFG_SHELL_CMD_DEBUG */
#endif /* LWIP_IPV6 */

#if LWIP_SNTP
u32_t osShellNtpdate(int argc, const char **argv)
{
    int server_num = 0;
    char *ret = NULL;
    struct timeval get_time;
    char buf[50];

    (void)memset_s(&get_time, sizeof(struct timeval), 0, sizeof(struct timeval));

    if (!tcpip_init_finish) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        return LOS_NOK;
    }

    if (argc < 1 || argv == NULL) {
        goto usage;
    }

    server_num = lwip_sntp_start(argc, (char **)argv, &get_time);
    if (server_num >= 0 && server_num < argc) {
        ret = ctime_r((time_t *)&get_time.tv_sec, buf);
        if (ret != NULL) {
            PRINTK("time server %s: %s\n", argv[server_num], ret);
        } else {
            PRINTK("ctime return null error\n");
        }
    } else {
        PRINTK("no server suitable for synchronization found\n");
    }

    return LOS_OK;

usage:
    PRINTK("\nUsage:\n");
    PRINTK("ntpdate [SERVER_IP1] [SERVER_IP2] ...\n");
    return LOS_NOK;
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(ntpdate_shellcmd, CMD_TYPE_EX, "ntpdate", XARGS, (CmdCallBackFunc)osShellNtpdate);
#endif /* LOSCFG_SHELL_CMD_DEBUG */

#endif /* LWIP_SNTP*/

#if LWIP_DNS
u32_t osShellDns(int argc, const char **argv)
{
    ip_addr_t dns = {0};
    err_t err;
    int i;
    if (argc < 1 || argv == NULL) {
        goto usage;
    }

    if (tcpip_init_finish == 0) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        return LOS_NOK;
    }

    if (argc == 1 && (strcmp(argv[0], "-a") == 0)) {
        for (i = 0; i < DNS_MAX_SERVERS; i++) {
            err = lwip_dns_getserver((u8_t)i, &dns);
            if (err == ERR_OK) {
                PRINTK("dns %d: %s\n", i + 1, ipaddr_ntoa_unsafe(&dns));
            } else {
                PRINTK("dns: failed\n");
                return LOS_NOK;
            }
        }
        return LOS_OK;
    } else if (argc == 2) {
        i = atoi(argv[0]);
        if ((i <= 0) || (i > DNS_MAX_SERVERS))
            goto usage;
#if LWIP_IPV6
        if (ip6addr_aton(argv[1], ((ip6_addr_t *)&dns))) {
#if LWIP_IPV4 && LWIP_IPV6
            dns.type = IPADDR_TYPE_V6;
#endif
            if (!ip6_addr_isglobal((ip6_addr_t *)&dns)) {
                PRINTK("ip address<%s> is wrong\n", argv[1]);
                return LOS_NOK;
            }
        } else
#endif
        {
#if LWIP_IPV4
            ((ip4_addr_t *)&dns)->addr = ipaddr_addr(argv[1]);
            if (((ip4_addr_t *)&dns)->addr == IPADDR_NONE) {
                PRINTK("ip address<%s> is wrong\n", argv[1]);
                return LOS_NOK;
            }
#if LWIP_IPV4 && LWIP_IPV6
            dns.type = IPADDR_TYPE_V4;
#endif
#endif
        }

        err = lwip_dns_setserver((u8_t)(i - 1), &dns);
        if (err != ERR_OK) {
            PRINTK("dns : failed\n");
            return LOS_NOK;
        }
        return LOS_OK;
    }
usage:
    PRINTK("usage:\n");
    PRINTK("\tdns <1-%d> <IP>\n", DNS_MAX_SERVERS);
    PRINTK("\tdns -a\n");
    return LOS_NOK;
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(dns_shellcmd, CMD_TYPE_EX, "dns", XARGS, (CmdCallBackFunc)osShellDns);
#endif /* LOSCFG_SHELL_CMD_DEBUG */
#endif /* LWIP_DNS */
#if LWIP_IPV6
extern struct nd6_neighbor_cache_entry neighbor_cache[LWIP_ND6_NUM_NEIGHBORS];
#endif
#if LWIP_IPV6
int netstat_get_udp_sendQLen6(struct udp_pcb *udppcb, struct pbuf *udpbuf)
{
    int sendLen = -1;
    u16_t offset = 0, len;
    struct ip6_hdr *iphdr = NULL;
    struct udp_hdr *udphdr = NULL;
    struct ip6_dest_hdr *dest_hdr = NULL;
    struct ip6_frag_hdr *frag_hdr = NULL;
    u8_t nexth;
    u16_t hlen = 0;

    LWIP_ERROR("netstat_get_udp6_sendQLen: NULL pcb received\n", (udppcb != NULL), return -1);
    LWIP_ERROR("netstat_get_udp6_sendQLen: NULL pbuf received\n", (udpbuf != NULL), return -1);

    iphdr = (struct ip6_hdr *)udpbuf->payload;

    if (!(ip6_addr_cmp(&iphdr->dest, ip_2_ip6(&udppcb->remote_ip)) &&
          (ip_addr_isany(&udppcb->local_ip) ||
           ip6_addr_cmp(&iphdr->src, ip_2_ip6(&udppcb->local_ip))))) {
        goto FUNC_OUT;
    }

    len = IP6_HLEN;
    if (pbuf_header(udpbuf, (s16_t)(-(s16_t)(len)))) {
        goto FUNC_OUT;
    }

    offset = len;

    nexth = IP6H_NEXTH(iphdr);
    while (offset < udpbuf->tot_len) {
        if (nexth == IP6_NEXTH_NONE || nexth == IP6_NEXTH_UDP || nexth == IP6_NEXTH_UDPLITE) {
            break;
        }
        switch (nexth) {
            case IP6_NEXTH_HOPBYHOP:
            case IP6_NEXTH_ROUTING:
                nexth = *((u8_t *)udpbuf->payload);
                hlen = (u16_t)(8 * (1 + *((u8_t *)udpbuf->payload + 1)));
                break;
            case IP6_NEXTH_DESTOPTS:
                nexth = *((u8_t *)udpbuf->payload);
                dest_hdr = (struct ip6_dest_hdr *)udpbuf->payload;
                hlen = (u16_t)(8 * (1 + dest_hdr->_hlen));
                break;
            case IP6_NEXTH_FRAGMENT:
                frag_hdr = (struct ip6_frag_hdr *)udpbuf->payload;
                nexth = frag_hdr->_nexth;
                hlen = IP6_FRAG_HLEN;
                break;
            default:
                /* Unknown next_header */
                goto FUNC_OUT;
        }

        (void)pbuf_header(udpbuf, (s16_t)(-(s16_t)hlen));
        offset = (u16_t)(offset + hlen);
    }

    /* If the while loop test condition failed , then revert the last offset change */
    if (offset >= udpbuf->tot_len) {
        offset = (u16_t)(offset - hlen);
        goto FUNC_OUT;
    }

    LWIP_ERROR("Transport option should be UDP", (nexth == IP6_NEXTH_UDP || nexth == IP6_NEXTH_UDPLITE), goto FUNC_OUT);

    if (offset > iphdr->_plen) {
        goto FUNC_OUT;
    }

    /* check if there is enough space for atleast udp header available */
    if (udpbuf->tot_len < UDP_HLEN) {
        goto FUNC_OUT;
    }

    udphdr = (struct udp_hdr *)udpbuf->payload;
    if ((ntohs(udphdr->dest) == udppcb->remote_port) && (ntohs(udphdr->src) == udppcb->local_port)) {
        if (ntohs(udphdr->len) > UDP_HLEN) {
            sendLen = ntohs(udphdr->len) - UDP_HLEN;
        } else {
            sendLen = udpbuf->tot_len - UDP_HLEN;
        }
    }

FUNC_OUT:
    (void)pbuf_header(udpbuf, (s16_t)offset); // can not cross max limit of s16_t
    return sendLen;
}
#endif

#if LWIP_IPV4
int netstat_get_udp_sendQLen(struct udp_pcb *udppcb, struct pbuf *udpbuf)
{
    int sendLen = -1;
    u16_t offset = 0, len;
    struct ip_hdr *iphdr = NULL;
    struct udp_hdr *udphdr = NULL;

    LWIP_ERROR("netstat_get_udp_sendQLen: NULL pcb received\n", (udppcb != NULL), return -1);
    LWIP_ERROR("netstat_get_udp_sendQLen: NULL pbuf received\n", (udpbuf != NULL), return -1);

    iphdr = (struct ip_hdr *)udpbuf->payload;

    if (!(ip4_addr_cmp(&iphdr->dest, ip_2_ip4(&udppcb->remote_ip)) &&
          (ip_addr_isany(&udppcb->local_ip) ||
           ip4_addr_cmp(&iphdr->src, ip_2_ip4(&udppcb->local_ip))))) {
        goto FUNC_OUT;
    }
#if LWIP_UDPLITE
    if ((IPH_PROTO(iphdr) != IP_PROTO_UDP) && (IPH_PROTO(iphdr) != IP_PROTO_UDPLITE)) {
#else
    if (IPH_PROTO(iphdr) != IP_PROTO_UDP) {
#endif
        goto FUNC_OUT;
    }

    if ((ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK) != 0) {
        goto FUNC_OUT;
    }

    len = (u16_t)(IPH_HL(iphdr) * 4);
    if (pbuf_header(udpbuf, (s16_t)(-len))) {
        goto FUNC_OUT;
    }

    offset = (u16_t)(offset + len);

    udphdr = (struct udp_hdr *)udpbuf->payload;
    if ((ntohs(udphdr->dest) == udppcb->remote_port) && (ntohs(udphdr->src) == udppcb->local_port)) {
        sendLen = ntohs(udphdr->len) - UDP_HLEN;
    }

FUNC_OUT:
    (void)pbuf_header(udpbuf, (s16_t)offset);
    return sendLen;
}
#endif

int netstat_tcp_recvq(struct tcp_pcb *tpcb)
{
    unsigned int retVal = 0;
#if LWIP_SO_RCVBUF
    struct netconn *conn = NULL;
#endif

    LWIP_ERROR("netstat_tcp_recvq: Received NULL pcb\n", (tpcb != NULL), return 0);

#if LWIP_SO_RCVBUF
    conn = (struct netconn *)tpcb->callback_arg;
    if (conn != NULL) {
        switch (conn->type) {
            case NETCONN_TCP:
            case NETCONN_RAW:
#if LWIP_IPV6
            case NETCONN_RAW_IPV6:
            case NETCONN_UDP_IPV6:
#endif
            case NETCONN_UDP:
                SYS_ARCH_GET(((unsigned int)conn->recv_avail /*+ conn->lrcv_left*/), retVal);
                break;
            default:
                retVal = 0; /* ur... very ugly, damn DHCP DNS and SNTP */
        }
    }
#endif

    return (int)retVal;
}

int netstat_tcp_sendq(struct tcp_pcb *tpcb)
{
    int retVal = 0;
    struct tcp_seg *useg = NULL;

    LWIP_ERROR("netstat_tcp_sendq: Received NULL pcb\n", (tpcb != NULL), return 0);

    for (useg = tpcb->unacked; useg != NULL; useg = useg->next) {
        retVal = retVal + useg->len;
    }

    return retVal;
}

#if LWIP_IPV6
int netstat_udp_sendq6(struct udp_pcb *upcb)
{
    int retLen = 0;
    int ret;
    int idx = 0;
    int i;
#if LWIP_ND6_QUEUEING
    struct nd6_q_entry *neibq = NULL;
#endif

    LWIP_ERROR("netstat_udp_sendq6: Received NULL pcb\n", (upcb != NULL), return 0);

    for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) {
        if (neighbor_cache[i].state != ND6_NO_ENTRY) {
            if (ip6_addr_cmp(&upcb->remote_ip.u_addr.ip6, &neighbor_cache[i].next_hop_address)) {
                idx = i;
                break;
            }
        }
    }
#if LWIP_ND6_QUEUEING
    for (neibq = neighbor_cache[idx].q; neibq != NULL; neibq = neibq->next) {
        ret = netstat_get_udp_sendQLen6(upcb, neibq->p);
        if (ret >= 0) {
            retLen += ret;
        }
    }
#else
    ret = netstat_get_udp_sendQLen6(upcb, neighbor_cache[idx].q);
    if (ret >= 0) {
      retLen += ret;
    }
#endif
    return retLen;
}
#endif

#if LWIP_IPV4
int netstat_udp_sendq(struct udp_pcb *upcb)
{
    int retLen = 0;
    int ret;
    int arpidx = -1;
    int i;
#if ARP_QUEUEING
    struct etharp_q_entry *arpq = NULL;
#endif

    LWIP_ERROR("netstat_udp_sendq: Received NULL pcb\n", (upcb != NULL), return 0);

    for (i = 0; i < ARP_TABLE_SIZE; ++i) {
        if (arp_table[i].state != ETHARP_STATE_EMPTY) {
            if (ip4_addr_cmp(ip_2_ip4(&upcb->remote_ip), &arp_table[i].ipaddr)) {
                arpidx = i;
                break;
            }
        }
    }

    if (arpidx >= 0) {
#if ARP_QUEUEING
        for (arpq = arp_table[arpidx].q; arpq != NULL; arpq = arpq->next) {
            ret = netstat_get_udp_sendQLen(upcb, arpq->p);
            if (ret > 0) {
                retLen += ret;
                if (retLen <= 0) { // overflow, set rteLen = -1 to indicate
                    retLen = -1;
                    break;
                }
            }
        }
#else
        ret = netstat_get_udp_sendQLen(upcb, arp_table[arpidx].q);
        if (ret > 0) {
          retLen += ret;
          if (retLen <= 0) { // overflow, set rteLen = -1 to indicate
            retLen = -1;
          }
        }
#endif
    }
    return retLen;
}
#endif
int netstat_netconn_recvq(const struct netconn *conn)
{
    unsigned int retVal = 0;

#if LWIP_SO_RCVBUF
    if (conn == NULL) {
        return 0;
    }

    switch (NETCONNTYPE_GROUP((unsigned int)(conn->type))) {
        case NETCONN_TCP:
        case NETCONN_RAW:
#if PF_PKT_SUPPORT
        case NETCONN_PKT_RAW:
#endif
        case NETCONN_UDP:
            SYS_ARCH_GET(((unsigned int)conn->recv_avail /*+ conn->lrcv_left*/), retVal);
            break;
        default:
            retVal = 0; /* ur... very ugly, damn DHCP DNS and SNTP */
    }
#endif
    return (int)retVal;
}

int netstat_netconn_sendq(struct netconn *conn)
{
    int retVal = 0;

    if (conn == NULL) {
        return 0;
    }

    switch (NETCONNTYPE_GROUP((unsigned int)(conn->type))) {
        case NETCONN_TCP:
            retVal = netstat_tcp_sendq(conn->pcb.tcp);
            break;
        case NETCONN_RAW:
            retVal = 0; /* todo */
            break;
#if PF_PKT_SUPPORT
        case NETCONN_PKT_RAW:
            retVal = 0; /* always be 0 as frame send to driver directly */
#endif
            break;
        case NETCONN_UDP:
            retVal = netstat_udp_sendq(conn->pcb.udp);
            break;
        default:
            retVal = 0; /* ur... very ugly, damn DHCP DNS and SNTP */
    }

    return retVal;
}
void netstat_internal(void *ctx)
{
    s8_t local_ip_port[64] = {0};
    s8_t remote_ip_port[64] = {0};
    struct tcp_pcb *tpcb = NULL;
    struct tcp_pcb_listen *lpcb = NULL;
    struct udp_pcb *upcb = NULL;
    struct raw_pcb *rpcb = NULL;
    s8_t *entry_buf = NULL;
    u32_t entry_buf_len;
    u32_t entry_buf_offset;
    struct netstat_data *ndata = (struct netstat_data *)ctx;
    int iRet;
    int recvQlen = 0;
    int sendQlen = 0;
    u_int proto;
#if PF_PKT_SUPPORT
    u8_t netif_name[IFNAMSIZ];
    struct netif *netif = NULL;
#endif

    if (ndata == NULL) {
        return;
    }
    entry_buf = ndata->netstat_out_buf;
    entry_buf_len = ndata->netstat_out_buf_len;
    entry_buf_offset = 0;

    if (entry_buf == NULL) {
        goto out;
    }
    iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                      "========== total sockets %d ======  unused sockets %d ==========\n",
                      LWIP_CONFIG_NUM_SOCKETS, get_unused_socket_num());
    if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
        goto out;
    }
    entry_buf_len -= (u32_t)(iRet);
    entry_buf_offset += (u32_t)(iRet);

#if LWIP_TCP
    if (tcp_active_pcbs != NULL || tcp_bound_pcbs != NULL || tcp_tw_pcbs != NULL || tcp_listen_pcbs.pcbs != NULL) {
        iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                          "%-8s%-12s%-12s%-24s%-24s%-16s\n",
                          "Proto", "Recv-Q", "Send-Q", "Local Address", "Foreign Address", "State");
        if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
            goto out;
        }
        entry_buf_len -= (u32_t)(iRet);
        entry_buf_offset += (u32_t)(iRet);

        for (tpcb = tcp_active_pcbs; tpcb != NULL; tpcb = tpcb->next) {
            iRet = snprintf_s((char *)local_ip_port, sizeof(local_ip_port), (sizeof(local_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&tpcb->local_ip), tpcb->local_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(local_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)remote_ip_port, sizeof(remote_ip_port), (sizeof(remote_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&tpcb->remote_ip), tpcb->remote_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(remote_ip_port))) {
                goto out;
            }
            if (tpcb->state == SYN_RCVD) {
                recvQlen = 0;
                sendQlen = 0;
            } else {
                recvQlen = netstat_netconn_recvq(tpcb->callback_arg);
                sendQlen = netstat_netconn_sendq(tpcb->callback_arg);
            }
            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              IP_IS_V6(&tpcb->local_ip) ? "%-8s%-12d%-12d%-39s%-39s%-16s\n" :
                              "%-8s%-12d%-12d%-24s%-24s%-16s\n",
                              IP_IS_V6(&tpcb->local_ip) ? "tcp-ip6" : "tcp",
                              recvQlen, sendQlen, local_ip_port, remote_ip_port, tcp_state_str[tpcb->state]);
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }

        /* For bound PCBs */
        sendQlen = 0;
        recvQlen = 0;

        for (tpcb = tcp_bound_pcbs; tpcb != NULL; tpcb = tpcb->next) {
            iRet = snprintf_s((char *)local_ip_port, sizeof(local_ip_port), (sizeof(local_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&tpcb->local_ip), tpcb->local_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(local_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)remote_ip_port, sizeof(remote_ip_port), (sizeof(remote_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&tpcb->remote_ip), tpcb->remote_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(remote_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              IP_IS_V6(&tpcb->local_ip) ? "%-8s%-12d%-12d%-39s%-39s%-16s\n" :
                              "%-8s%-12d%-12d%-24s%-24s%-16s\n",
                              IP_IS_V6(&tpcb->local_ip) ? "tcp-ip6" : "tcp",
                              recvQlen, sendQlen, local_ip_port, remote_ip_port, tcp_state_str[tpcb->state]);
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }

        for (tpcb = tcp_tw_pcbs; tpcb != NULL; tpcb = tpcb->next) {
            iRet = snprintf_s((char *)local_ip_port, sizeof(local_ip_port), (sizeof(local_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&tpcb->local_ip), tpcb->local_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(local_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)remote_ip_port, sizeof(remote_ip_port), (sizeof(remote_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&tpcb->remote_ip), tpcb->remote_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(remote_ip_port))) {
                goto out;
            }

            recvQlen = netstat_netconn_recvq(tpcb->callback_arg);
            sendQlen = netstat_netconn_sendq(tpcb->callback_arg);
            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              IP_IS_V6(&tpcb->local_ip) ? "%-8s%-12d%-12d%-39s%-39s%-16s\n" :
                              "%-8s%-12d%-12d%-24s%-24s%-16s\n",
                              IP_IS_V6(&tpcb->local_ip) ? "tcp-ip6" : "tcp",
                              recvQlen, sendQlen, local_ip_port, remote_ip_port, tcp_state_str[tpcb->state]);
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }

        /* For listen PCBs */
        recvQlen = 0;
        sendQlen = 0;

        for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
            iRet = snprintf_s((char *)local_ip_port, sizeof(local_ip_port), (sizeof(local_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&lpcb->local_ip), lpcb->local_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(local_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)remote_ip_port, sizeof(remote_ip_port), (sizeof(remote_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&lpcb->remote_ip), 0);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(remote_ip_port))) {
                goto out;
            }

            recvQlen = netstat_netconn_recvq(lpcb->callback_arg);

            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              IP_IS_V6(&lpcb->local_ip) ? "%-8s%-12d%-12d%-39s%-39s%-16s\n" :
                              "%-8s%-12d%-12d%-24s%-24s%-16s\n",
                              IP_IS_V6(&lpcb->local_ip) ? "tcp-ip6" : "tcp",
                              recvQlen, sendQlen, local_ip_port, remote_ip_port, tcp_state_str[lpcb->state]);
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }
    }
#endif
#if LWIP_UDP
    if (udp_pcbs != NULL) {
        iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                          "\n%-8s%-12s%-12s%-24s%-24s\n",
                          "Proto", "Recv-Q", "Send-Q", "Local Address", "Foreign Address");
        if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
            goto out;
        }
        entry_buf_len -= (u32_t)(iRet);
        entry_buf_offset += (u32_t)(iRet);

        for (upcb = udp_pcbs; upcb != NULL; upcb = upcb->next) {
            iRet = snprintf_s((char *)local_ip_port, sizeof(local_ip_port), (sizeof(local_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&upcb->local_ip), upcb->local_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(local_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)remote_ip_port, sizeof(remote_ip_port), (sizeof(remote_ip_port) - 1),
                              "%s:%d", ipaddr_ntoa(&upcb->remote_ip), upcb->remote_port);
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(remote_ip_port))) {
                goto out;
            }

            recvQlen = netstat_netconn_recvq(upcb->recv_arg);
#if LWIP_IPV6
            sendQlen = IP_IS_V6(&upcb->local_ip) ? netstat_udp_sendq6(upcb) : netstat_netconn_sendq(upcb->recv_arg);
#else
            sendQlen = netstat_netconn_sendq(upcb->recv_arg);
#endif
            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              IP_IS_V6(&upcb->local_ip) ? "%-8s%-12d%-12d%-39s%-39s%-16s\n" :
                              "%-8s%-12d%-12d%-24s%-24s%-16s\n",
                              IP_IS_V6(&upcb->local_ip) ? "udp-ip6" : "udp",
                              recvQlen, sendQlen, local_ip_port, remote_ip_port, " ");
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }
    }
#endif

#if LWIP_RAW
    if (raw_pcbs != NULL) {
        iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                          "\n%-8s%-12s%-12s%-20s%-20s%-16s%-16s\n",
                          "Type", "Recv-Q", "Send-Q", "Local Address", "Foreign Address", "Protocol", "HDRINCL");
        if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
            goto out;
        }
        entry_buf_len -= (u32_t)(iRet);
        entry_buf_offset += (u32_t)(iRet);

        for (rpcb = raw_pcbs; rpcb != NULL; rpcb = rpcb->next) {
            iRet = snprintf_s((char *)local_ip_port, sizeof(local_ip_port), (sizeof(local_ip_port) - 1),
                              "%s", ipaddr_ntoa(&rpcb->local_ip));
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(local_ip_port))) {
                goto out;
            }

            iRet = snprintf_s((char *)remote_ip_port, sizeof(remote_ip_port), (sizeof(remote_ip_port) - 1),
                              "%s", ipaddr_ntoa(&rpcb->remote_ip));
            if ((iRet <= 0) || ((u32_t)(iRet) >= sizeof(remote_ip_port))) {
                goto out;
            }

            recvQlen = netstat_netconn_recvq(rpcb->recv_arg);
            sendQlen = netstat_netconn_sendq(rpcb->recv_arg);

            proto = rpcb->protocol;//raw_proto;
            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              "%-8s%-12d%-12d%-20s%-20s%-16u%-16d\n",
                              "raw", recvQlen, sendQlen, local_ip_port, remote_ip_port, proto, /*rpcb->hdrincl*/0);
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }
    }
#if PF_PKT_SUPPORT
    if (pkt_raw_pcbs != NULL) {
        iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                          "\n%-12s%-12s%-12s%-16s%-12s\n", "Type", "Recv-Q", "Send-Q", "Protocol", "netif");
        if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
            goto out;
        }
        entry_buf_len -= (u32_t)(iRet);
        entry_buf_offset += (u32_t)(iRet);

        for (rpcb = pkt_raw_pcbs; rpcb != NULL; rpcb = rpcb->next) {
            recvQlen = netstat_netconn_recvq(rpcb->recv_arg);
            sendQlen = netstat_netconn_sendq(rpcb->recv_arg);

            for (netif = netif_list; netif != NULL; netif = netif->next) {
                if (netif_get_index(netif)/*netif->ifindex*/ == rpcb->netif_idx/*index*/) {
                    (void)snprintf_s((char *)netif_name, IFNAMSIZ, IFNAMSIZ - 1, "%s", netif_get_name(netif));
                    break;
                }
            }

            if (netif == NULL) {
                (void)snprintf_s((char *)netif_name, IFNAMSIZ, IFNAMSIZ - 1, "%s", "None");
            }

            proto = rpcb->protocol;//ntohs(rpcb->proto.eth_proto);

            iRet = snprintf_s((char *)(entry_buf + entry_buf_offset), entry_buf_len, entry_buf_len - 1,
                              "%-12s%-12d%-12d%-16x%-12s\n", "pkt-raw", recvQlen, sendQlen, proto, netif_name);
            if ((iRet <= 0) || ((u32_t)(iRet) >= entry_buf_len)) {
                goto out;
            }
            entry_buf_len -= (u32_t)(iRet);
            entry_buf_offset += (u32_t)(iRet);
        }
    }
#endif
#endif

out:
    ndata->netstat_out_buf_updated_len = entry_buf_offset;
    sys_sem_signal(&ndata->cb_completed);
    return;
}

u32_t osShellNetstat(int argc, const char **argv)
{
    struct netstat_data ndata;
    err_t err;

    if (argc > 0) {
        PRINTK("\nUsage: netstat\n");
        return LOS_NOK;
    }

    if (tcpip_init_finish == 0) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        return LOS_NOK;
    }

    ndata.netstat_out_buf = mem_malloc(MAX_NETSTAT_ENTRY);
    if (ndata.netstat_out_buf == NULL) {
        PRINTK("%s: no free mem\n", __FUNCTION__);
        return LOS_NOK;
    }
    ndata.netstat_out_buf_len = MAX_NETSTAT_ENTRY;
    ndata.netstat_out_buf_updated_len = 0;

    if (sys_sem_new(&ndata.cb_completed, 0) != ERR_OK) {
        goto err_hand;
    }

    err = tcpip_callback(netstat_internal, &ndata);
    if (err != ERR_OK) {
        sys_sem_free(&ndata.cb_completed);
        goto err_hand;
    }

    (void)sys_arch_sem_wait(&ndata.cb_completed, 0);
    sys_sem_free(&ndata.cb_completed);
    if ((ndata.netstat_out_buf_updated_len > 0) && (ndata.netstat_out_buf_updated_len < MAX_NETSTAT_ENTRY)) {
        PRINTK("%s\n", (char *)(ndata.netstat_out_buf));
        mem_free(ndata.netstat_out_buf);
        return LOS_OK;
    }

err_hand:
    mem_free(ndata.netstat_out_buf);
    ndata.netstat_out_buf = NULL;
    (void)(argv);
    return LOS_NOK;
}
#ifdef LOSCFG_SHELL
SHELLCMD_ENTRY(netstat_shellcmd, CMD_TYPE_EX, "netstat", XARGS, (CmdCallBackFunc)osShellNetstat);
#endif /* LOSCFG_SHELL */

#define NETIF_NAME_LEN 10
STATIC VOID OsShellDhclientUsage(VOID)
{
    PRINTK("<netif name>,       start dhcp for netif name\n"
           "-x <netif name>,    stop dhcp for netif name\n"
           "-h | --help,        print dhclient command usage\n");
}

u32_t OsShellDhclient(int argc, const char **argv)
{
    struct netif *netif = NULL;

    if (argc == 0) {
        OsShellDhclientUsage();
    } else if (argc == 1) {
        if (strcmp(argv[0], "-h") == 0 || strcmp(argv[0], "--help") == 0) {
            OsShellDhclientUsage();
        } else {
            netif = netif_find(argv[0]);
            if (netif != NULL) {
                (VOID)netifapi_dhcp_start(netif);
            } else {
                PRINTK("dhclient: invalid option: %s\n", argv[0]);
                OsShellDhclientUsage();
            }
        }
    } else if (argc == 2) {
        if (strcmp(argv[0], "-x") == 0) {
            netif = netif_find(argv[1]);
            if (netif != NULL) {
                (VOID)netifapi_dhcp_stop(netif);
            } else {
                PRINTK("dhclient: invalid option: %s\n", argv[1]);
                OsShellDhclientUsage();
            }
        } else {
            PRINTK("dhclient: invalid option: %s\n", argv[0]);
            OsShellDhclientUsage();
        }
    } else {
        OsShellDhclientUsage();
    }

    return 0;
}

#ifdef LOSCFG_SHELL
SHELLCMD_ENTRY(dhclient_shellcmd, CMD_TYPE_EX, "dhclient", XARGS, (CmdCallBackFunc)OsShellDhclient);
#endif /* LOSCFG_SHELL */

#ifdef LWIP_DEBUG_TCPSERVER

#define MAX_SIZE 1024
void tcp_access(int sockfd)
{
    size_t n, i;
    ssize_t ret;
    char msg[MAX_SIZE] = {0};
    while (1) {
        PRINTK("waiting for recv\n");
        (void)memset_s(msg, MAX_SIZE, 0, MAX_SIZE);
        ret = recv(sockfd, msg, MAX_SIZE - 1, 0);
        if (ret < 0) {
            PRINTK("recv failed, %d.\n", (u32_t)ret);
            (void)closesocket(sockfd);
            return;
        } else if (ret == 0) {
            (void)closesocket(sockfd);
            PRINTK("client disconnect.\n");
            return;
        }

        n = strlen(msg);
        for (i = 0; i < n; ++i) {
            if (msg[i] >= 'a' && msg[i] <= 'z') {
                msg[i] = (char)(msg[i] + ('A' - 'a'));
            } else if (msg[i] >= 'A' && msg[i] <= 'Z') {
                msg[i] = (char)(msg[i] + ('a' - 'A'));
            }
        }

        if (send(sockfd, msg, n, 0) < 0) {
            PRINTK("send failed!\r\n");
            continue;
        }
    }
}

u32_t osTcpserver(int argc, const char **argv)
{
    uint16_t port;
    int sockfd = -1;
    int ret;
    struct sockaddr_in seraddr;
    struct sockaddr_in cliaddr;
    u32_t cliaddr_size = (u32_t)sizeof(cliaddr);
    int reuse, iPortVal;

    if (tcpip_init_finish == 0) {
        PRINTK("tcpip_init have not been called\n");
        return LOS_NOK;
    }

    if (argc < 1 || argv == NULL) {
        PRINTK("\nUsage: tcpserver <port>\n");
        return LOS_NOK;
    }

    iPortVal = atoi(argv[0]);
    /* Port 0 not supported , negative values not supported , max port limit is 65535 */
    if (iPortVal <= 0 || iPortVal > 65535) {
        PRINTK("\nUsage: Invalid port\n");
        return LOS_NOK;
    }

    port = (uint16_t)iPortVal;

    /* removed the print of argv[1] as its accessing argv[1] without verifying argc and
     * argv[1] not used anywhere else */
    PRINTK("argv[0]:%s, argc:%d\r\n", argv[0], argc);
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        PRINTK("\nUsage: create socket fail!\n");
        return LOS_NOK;
    }
    reuse = 1;
    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, (const char *)&reuse, sizeof(reuse)) != 0) {
        (void)closesocket(sockfd);
        PRINTK("set SO_REUSEADDR failed\n");
        return LOS_NOK;
    }

    (void)memset_s(&seraddr, sizeof(seraddr), 0, sizeof(seraddr));
    seraddr.sin_family = AF_INET;
    seraddr.sin_addr.s_addr = htonl(INADDR_ANY);
    seraddr.sin_port = htons(port);

    ret = bind(sockfd, (struct sockaddr *)&seraddr, sizeof(seraddr));
    if (ret < 0) {
        PRINTK("bind ip and port failed");
        (void)closesocket(sockfd);
        return LOS_NOK;
    }

    ret = listen(sockfd, 5);
    if (ret < 0) {
        (void)closesocket(sockfd);
        PRINTK("listen failed\n");
        return LOS_NOK;
    }
    while (1) {
        PRINTK("waiting for accept\n");
        (void)memset_s(&cliaddr, sizeof(struct sockaddr_in), 0, sizeof(struct sockaddr_in));
        ret = (int)accept(sockfd, (struct sockaddr *)&cliaddr, &cliaddr_size);
        if (ret < 0) {
            (void)closesocket(sockfd);
            PRINTK("Accept failed, %d\n", ret);
            break;
        }
        tcp_access(ret);
    }
    return LOS_NOK;            // Hits Only If Accept Fails
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(tcpserver_shellcmd, CMD_TYPE_EX, "tcpserver", XARGS, (CmdCallBackFunc)osTcpserver);
#endif /* LOSCFG_SHELL_CMD_DEBUG */
#endif /* LWIP_DEBUG_TCPSERVER */

#ifdef LWIP_DEBUG_UDPSERVER
void udpserver(int argc, const char **argv)
{
    int sockfd, fromlen;
    int ret, iPortVal;
    struct sockaddr_in seraddr;
    struct sockaddr_in cliaddr;
    size_t n, i;

    char msg[MAX_SIZE] = {0};
    uint16_t port;

    if (argc < 1) {
        PRINTK("\nUsage: udpserver <port>\n");
        return;
    }

    iPortVal = atoi(argv[0]);
    /* Port 0 not supported , negative values not supported , max port limit is 65535 */
    if (iPortVal <= 0 || iPortVal > 65535) {
        PRINTK("\nUsage: Invalid Port\n");
        return;
    }

    port = (uint16_t)iPortVal;

    PRINTK("port:%d\r\n", port);

    sockfd = lwip_socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sockfd == -1) {
        PRINTK("\ncreate socket fail\n");
        return;
    }

    (void)memset_s(&seraddr, sizeof(seraddr), 0, sizeof(seraddr));
    (void)memset_s(&cliaddr, sizeof(cliaddr), 0, sizeof(cliaddr));
    seraddr.sin_family = AF_INET;
    seraddr.sin_addr.s_addr = htonl(INADDR_ANY);
    seraddr.sin_port = htons(port);
    ret = lwip_bind(sockfd, (struct sockaddr *)&seraddr, sizeof(seraddr));
    if (ret < 0) {
        PRINTK("bind ip and port failed:%d\n", errno);
        (void)closesocket(sockfd);
        return;
    }

    while (1) {
        ret = recvfrom(sockfd, msg, MAX_SIZE - 1, 0, (struct sockaddr *)&cliaddr, (socklen_t *)&fromlen);
        if (ret >= 0) {
            n = strlen(msg);
            for (i = 0; i < n; ++i) {
                if (msg[i] >= 'a' && msg[i] <= 'z') {
                    msg[i] = (char)(msg[i] + 'A' - 'a');
                } else if (msg[i] >= 'A' && msg[i] <= 'Z') {
                    msg[i] = (char)(msg[i] + 'a' - 'A');
                }
            }
            ret = sendto(sockfd, msg, n + 1, 0, (struct sockaddr *)&cliaddr, (socklen_t)fromlen);
            if (ret <= 0 && errno == EPIPE) {
                break;
            }
        } else {
            break;
        }
    }

    (void)closesocket(sockfd);
    return;
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(udpserver_shellcmd, CMD_TYPE_EX, "udpserver", XARGS, (CmdCallBackFunc)udpserver);
#endif /* LOSCFG_SHELL_CMD_DEBUG */
#endif /* LWIP_DEBUG_UDPSERVER */

#ifdef LWIP_DEBUG_INFO
LWIP_STATIC
u32_t netdebug_memp(int argc, const char **argv)
{
    u32_t ret = LOS_OK;
    int type;

    if (argc == 2) {
        if (!strcmp("-i", argv[1])) {
            debug_memp_info();
        } else if (!strcmp("-udp", argv[1])) {
            debug_memp_type_info(MEMP_UDP_PCB);
        } else if (!strcmp("-tcp", argv[1])) {
            debug_memp_type_info(MEMP_TCP_PCB);
        } else if (!strcmp("-raw", argv[1])) {
            debug_memp_type_info(MEMP_RAW_PCB);
        } else if (!strcmp("-conn", argv[1])) {
            debug_memp_type_info(MEMP_NETCONN);
        } else {
            ret = LOS_NOK;
        }
    } else if (argc == 3) {
        if (!strcmp("-d", argv[1])) {
            type = atoi(argv[2]);
            if (type >= 0) {
                debug_memp_detail(type);
            } else {
                PRINTK("Error: type < 0\n");
                ret = LOS_NOK;
            }
        } else {
            ret = LOS_NOK;
        }
    } else {
        ret = LOS_NOK;
    }

    return ret;
}

LWIP_STATIC
u32_t netdebug_sock(int argc, const char **argv)
{
    int idx;
    u32_t ret = LOS_NOK;

    if (argc == 2) {
        if (!strcmp("-i", argv[1])) {
            /* netdebug sock -i */
            for (idx = 0; idx < (int)LWIP_CONFIG_NUM_SOCKETS; idx++) {
                debug_socket_info(idx, 1, 0);
            }
            ret = LOS_OK;
        }
    } else if (argc == 3) {
        if (!strcmp("-d", argv[1])) {
            /* netdebug sock -d <idx> */
            idx = atoi(argv[2]);
            if (idx >= 0) {
                debug_socket_info(idx, 1, 1);
                ret = LOS_OK;
            } else {
                PRINTK("Error: idx < 0\n");
            }
        }
    }

    return ret;
}


u32_t osShellNetDebug(int argc, const char **argv)
{
    u32_t ret = LOS_NOK;

    if (argc < 1 || argv == NULL) {
        goto usage;
    }

    if (!strcmp("memp", argv[0])) {
        ret = netdebug_memp(argc, argv);
        if (ret != LOS_OK) {
            goto usage_memp;
        }
    } else if (!strcmp("sock", argv[0])) {
        /* netdebug sock {-i | -d <idx>} */
        ret = netdebug_sock(argc, argv);
        if (ret != LOS_OK) {
            goto usage_sock;
        }
    } else {
        goto usage;
    }
    return ret;

usage:
    /* Cmd help */
    PRINTK("\nUsage:\n");
    PRINTK("netdebug memp {-i | -d <type> | -udp | -tcp | -raw |-conn}\n");
    PRINTK("netdebug sock {-i | -d <idx>}\n");
    return LOS_NOK;

usage_memp:
    /* netdebug memp help */
    PRINTK("\nUsage:\n");
    PRINTK("netdebug memp {-i | -d <type> | -udp | -tcp | -raw |-conn}\n");
    return LOS_NOK;

usage_sock:
    /* netdebug sock help */
    PRINTK("\nUsage:\n");
    PRINTK("netdebug sock {-i | -d <idx>}\n");
    return LOS_NOK;
}
#endif /* LWIP_DEBUG_INFO */

#if defined(LOSCFG_SHELL_CMD_DEBUG) && defined(LWIP_DEBUG_INFO)
SHELLCMD_ENTRY(netdebug_shellcmd, CMD_TYPE_EX, "netdebug", XARGS, (CmdCallBackFunc)osShellNetDebug);
#endif /* LOSCFG_SHELL_CMD_DEBUG && LWIP_DEBUG_INFO */

u32_t osShellIpDebug(int argc, const char **argv)
{
    u8_t i = 0;
    char acIPv6Addr[IP6ADDR_STRLEN_MAX + 1] = {0};
    char aclladdr[20] = {0};
    const char *acStates[] = {"NO_ENTRY", "INCOMPLETE", "REACHABLE", "STALE", "DELAY", "PROBE"};
    u8_t atleastOneEntry = 0;

    if (!tcpip_init_finish) {
        PRINTK("%s: tcpip_init have not been called\n", __FUNCTION__);
        goto exit;
    }

    /* Display prefix */
    PRINTK("=================\n");
    PRINTK("|| Prefix List ||\n");
    PRINTK("=================\n");
    PRINTK("%-50s %-16s %-20s\n", "Prefix", "netif", "validLifetime");
    PRINTK("---------------------------------------------------------------------------------\n");
    /* Display neighbour Cache Entry */
    for (i = 0; i < LWIP_ND6_NUM_PREFIXES; i++) {
        if (prefix_list[i].netif != NULL && prefix_list[i].invalidation_timer > 0) {
            atleastOneEntry = 1;
            (void)ip6addr_ntoa_r((const ip6_addr_t *)(prefix_list[i].prefix.addr), (acIPv6Addr), sizeof(acIPv6Addr));
            PRINTK("%-50s ", acIPv6Addr);
            PRINTK("%-16s ", netif_get_name(prefix_list[i].netif));
            PRINTK("%-20u\n", prefix_list[i].invalidation_timer);
        }
    }

    if (!atleastOneEntry) {
        PRINTK("**** NO VALID PREFIXES FOUND CONFIGURED ****\n");
    }
    PRINTK("---------------------------------------------------------------------------------\n");

    atleastOneEntry = 0;

    PRINTK("\n\n");
    PRINTK("============================\n");
    PRINTK("|| Neighbor Cache Entries ||\n");
    PRINTK("============================\n");
    PRINTK("%-50s %-25s %-16s %-15s %-10s\n", "Neighbor", "MAC", "netif", "state", "IsRouter");
    PRINTK("------------------------------------------------------------"
           "----------------------------------------------------------\n");

    /* Display neighbour Cache Entry */
    for (i = 0; i < LWIP_ND6_NUM_NEIGHBORS; i++) {
        if (neighbor_cache[i].state != ND6_NO_ENTRY) {
            atleastOneEntry = 1;
            (void)ip6addr_ntoa_r((const ip6_addr_t *)(neighbor_cache[i].next_hop_address.addr), (acIPv6Addr),
                                 sizeof(acIPv6Addr));
            PRINTK("%-50s ", acIPv6Addr);

            if (snprintf_s(aclladdr, sizeof(aclladdr), sizeof(aclladdr) - 1, "%02X:%02X:%02X:%02X:%02X:%02X",
                           neighbor_cache[i].lladdr[0], neighbor_cache[i].lladdr[1], neighbor_cache[i].lladdr[2],
                           neighbor_cache[i].lladdr[3], neighbor_cache[i].lladdr[4], neighbor_cache[i].lladdr[5]) < 0) {
                return LOS_NOK;
            }
            PRINTK("%-25s ", aclladdr);
            PRINTK("%-16s ", netif_get_name(neighbor_cache[i].netif));
            PRINTK("%-15s ", acStates[neighbor_cache[i].state]);
            PRINTK("%-10s\n", (neighbor_cache[i].isrouter ? "Yes" : "No"));
        }
    }
    if (!atleastOneEntry) {
        PRINTK("**** NO NEIGHBOURS FOUND ****\n");
    }
    PRINTK("------------------------------------------------------------"
           "----------------------------------------------------------\n");

    atleastOneEntry = 0;

    PRINTK("\n\n");
    PRINTK("===============================\n");
    PRINTK("|| Destination Cache Entries ||\n");
    PRINTK("===============================\n");
    PRINTK("%-50s %-50s %-10s %-10s\n", "Destination", "NextHop", "PMTU", "age");
    PRINTK("------------------------------------------------------------"
           "--------------------------------------------------------\n");
    /* Display destination Cache Entry */
    for (i = 0; i < LWIP_ND6_NUM_DESTINATIONS; i++) {
        if (!ip6_addr_isany(&(destination_cache[i].destination_addr))) {
            atleastOneEntry = 1;
            (void)ip6addr_ntoa_r((const ip6_addr_t *)(destination_cache[i].destination_addr.addr), (acIPv6Addr),
                                 sizeof(acIPv6Addr));
            PRINTK("%-50s ", acIPv6Addr);
            (void)ip6addr_ntoa_r((const ip6_addr_t *)(destination_cache[i].next_hop_addr.addr), (acIPv6Addr),
                                 sizeof(acIPv6Addr));
            PRINTK("%-50s ", acIPv6Addr);
            PRINTK("%-10u ", destination_cache[i].pmtu);
            PRINTK("%-10u\n", destination_cache[i].age);
        }
    }
    if (!atleastOneEntry) {
        PRINTK("**** NO DESTINATION CACHE FOUND ****\n");
    }
    PRINTK("------------------------------------------------------------"
           "--------------------------------------------------------\n");

    atleastOneEntry = 0;
    PRINTK("\n\n");
    PRINTK("============================\n");
    PRINTK("|| Default Router Entries ||\n");
    PRINTK("============================\n");
    PRINTK("%-50s %-20s %-10s\n", "Router", "invalidation_timer", "flags");
    PRINTK("-----------------------------------------------------------------------------\n");
    /* Display Default Router Cache Entry */
    for (i = 0; i < LWIP_ND6_NUM_ROUTERS; i++) {
        if (default_router_list[i].neighbor_entry) {
            atleastOneEntry = 1;
            (void)ip6addr_ntoa_r((const ip6_addr_t *)((default_router_list[i].neighbor_entry)->next_hop_address.addr),
                                 (acIPv6Addr), sizeof(acIPv6Addr));
            PRINTK("%-50s ", acIPv6Addr);
            PRINTK("%-20u ", default_router_list[i].invalidation_timer);
            PRINTK("%-10u\n", default_router_list[i].flags);
        }
    }
    if (!atleastOneEntry) {
        PRINTK("**** NO DEFAULT ROUTERS FOUND ****\n");
    }
    PRINTK("-----------------------------------------------------------------------------\n");

exit:
    return LOS_OK;
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(ipdebug_shellcmd, CMD_TYPE_EX, "ipdebug", XARGS, (CmdCallBackFunc)osShellIpDebug);
#endif
#ifdef LWIP_TESTBED
extern void cmd_reset(void);

void osShellReboot(int argc, const char **argv)
{
    cmd_reset();
}

#ifdef LOSCFG_SHELL_CMD_DEBUG
SHELLCMD_ENTRY(reboot_shellcmd, CMD_TYPE_EX, "reboot", XARGS, (CmdCallBackFunc)osShellReboot);
#endif /* LOSCFG_SHELL_CMD_DEBUG */
#endif

#endif //LWIP_ENABLE_LOS_SHELL_CMD
