mbtk/libmbtk_lib/tcpip/mbtk_tcpip_at.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sys/epoll.h>
#include <string.h>
#include <fcntl.h>
#include <signal.h>
#include <netinet/tcp.h>

#include "mbtk_log.h"
#include "mbtk_tcpip.h"
#include "mbtk_net_control.h"

#define MBTK_TCPIP_CID_DEFAULT  0
#define MBTK_TCPIP_READ_BUFF_SIZE 2048
#define TCPIP_DEBUG 0

typedef struct {
    mbtk_sock_session sock_fd;
    char ser_addr[256];
    int ser_port;
    char local_addr[256];
    int local_port;
    bool ack_support;
    bool ssl_support;
    bool ignore_cert;
    uint32 heartbeat_time;
    uint32 delay_time;

    mbtk_tcpip_read_callback_func read_cb;

    uint32 data_traffic_send;
    uint32 data_traffic_recv;

} mbtk_tcpip_cli_info_t;

typedef struct {
    mbtk_sock_session sock_fd;
    char ser_addr[256];
    int ser_port;

    int cli_num;
    mbtk_tcpip_cli_info_t *cli_list;
} mbtk_tcpip_ser_info_t;

typedef struct {
    int link_id;
    int link_cid;
    bool link_connected;
    mbtk_sock_type prot_type;    // TCP/UDP

    mbtk_tcpip_type_enum type;
    union
    {
        mbtk_tcpip_cli_info_t cli_info;
        mbtk_tcpip_ser_info_t ser_info;
    } tcpip_info;

} mbtk_tcpip_link_t;

static mbtk_tcpip_link_t tcpip_link[MBTK_TCPIP_LINK_MAX];
static bool tcpip_inited = FALSE;
static mbtk_sock_handle tcpip_handle;
static mbtk_tcpip_net_callback_func tcpip_net_cb = NULL;
static mbtk_tcpip_sock_callback_func tcpip_sock_cb = NULL;

/*
struct tcp_info
{
  u_int8_t	tcpi_state;
  u_int8_t	tcpi_ca_state;
  u_int8_t	tcpi_retransmits;
  u_int8_t	tcpi_probes;
  u_int8_t	tcpi_backoff;
  u_int8_t	tcpi_options;
  u_int8_t	tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;

  u_int32_t	tcpi_rto;
  u_int32_t	tcpi_ato;
  u_int32_t	tcpi_snd_mss;
  u_int32_t	tcpi_rcv_mss;

  u_int32_t	tcpi_unacked;
  u_int32_t	tcpi_sacked;
  u_int32_t	tcpi_lost;
  u_int32_t	tcpi_retrans;
  u_int32_t	tcpi_fackets;

  u_int32_t	tcpi_last_data_sent;
  u_int32_t	tcpi_last_ack_sent;
  u_int32_t	tcpi_last_data_recv;
  u_int32_t	tcpi_last_ack_recv;

  u_int32_t	tcpi_pmtu;
  u_int32_t	tcpi_rcv_ssthresh;
  u_int32_t	tcpi_rtt;
  u_int32_t	tcpi_rttvar;
  u_int32_t	tcpi_snd_ssthresh;
  u_int32_t	tcpi_snd_cwnd;
  u_int32_t	tcpi_advmss;
  u_int32_t	tcpi_reordering;

  u_int32_t	tcpi_rcv_rtt;
  u_int32_t	tcpi_rcv_space;

  u_int32_t	tcpi_total_retrans;
};

*/
void tcp_info_print(struct tcp_info *tcp)
{
    if(tcp) {
        LOGD("tcpi_state = %d", tcp->tcpi_state);
        LOGD("tcpi_ca_state = %d", tcp->tcpi_ca_state);
        LOGD("tcpi_retransmits = %d", tcp->tcpi_retransmits);
        LOGD("tcpi_probes = %d", tcp->tcpi_probes);
        LOGD("tcpi_backoff = %d", tcp->tcpi_backoff);
        LOGD("tcpi_options = %d", tcp->tcpi_options);
        LOGD("tcpi_snd_wscale = %d", 0x0F & tcp->tcpi_snd_wscale);
        LOGD("tcpi_rcv_wscale = %d", 0xF0 & tcp->tcpi_rcv_wscale);
        LOGD("tcpi_rto = %d", tcp->tcpi_rto);
        LOGD("tcpi_ato = %d", tcp->tcpi_ato);
        LOGD("tcpi_snd_mss = %d", tcp->tcpi_snd_mss);
        LOGD("tcpi_rcv_mss = %d", tcp->tcpi_rcv_mss);
        LOGD("tcpi_unacked = %d", tcp->tcpi_unacked);
        LOGD("tcpi_sacked = %d", tcp->tcpi_sacked);
        LOGD("tcpi_lost = %d", tcp->tcpi_lost);
        LOGD("tcpi_retrans = %d", tcp->tcpi_retrans);
        LOGD("tcpi_fackets = %d", tcp->tcpi_fackets);
        LOGD("tcpi_last_data_sent = %d", tcp->tcpi_last_data_sent);
        LOGD("tcpi_last_ack_sent = %d", tcp->tcpi_last_ack_sent);
        LOGD("tcpi_last_data_recv = %d", tcp->tcpi_last_data_recv);
        LOGD("tcpi_last_ack_recv = %d", tcp->tcpi_last_ack_recv);
        LOGD("tcpi_pmtu = %d", tcp->tcpi_pmtu);
        LOGD("tcpi_rcv_ssthresh = %d", tcp->tcpi_rcv_ssthresh);
        LOGD("tcpi_rtt = %d", tcp->tcpi_rtt);
        LOGD("tcpi_rttvar = %d", tcp->tcpi_rttvar);
        LOGD("tcpi_snd_ssthresh = %d", tcp->tcpi_snd_ssthresh);
        LOGD("tcpi_snd_cwnd = %d", tcp->tcpi_snd_cwnd);
        LOGD("tcpi_advmss = %d", tcp->tcpi_advmss);
        LOGD("tcpi_reordering = %d", tcp->tcpi_reordering);
        LOGD("tcpi_rcv_rtt = %d", tcp->tcpi_rcv_rtt);
        LOGD("tcpi_rcv_space = %d", tcp->tcpi_rcv_space);
        LOGD("tcpi_total_retrans = %d", tcp->tcpi_total_retrans);
    }
}

static int tcpip_fd_2_link(int fd)
{
    int link_id = 0;
    mbtk_tcpip_link_t *link = NULL;
    for(; link_id < MBTK_TCPIP_LINK_MAX; link_id++) {
        link = tcpip_link + link_id;
        if(link->link_connected) {
            if(link->type == MBTK_TCPIP_TYPE_CLIENT) {
                if(link->tcpip_info.cli_info.sock_fd > 0 && link->tcpip_info.cli_info.sock_fd == fd) {
                    break;
                }
            } else {
                // Not support.

            }
        }
    }

    if(link_id == MBTK_TCPIP_LINK_MAX) {
        return -1;
    } else {
        return link_id;
    }
}

static void tcpip_sock_cb_func(int handle, mbtk_sock_cb_info_s *sock_info)
{
    if(tcpip_inited && tcpip_handle == handle/* && http_fd == fd*/) {
        if(sock_info->event & (EPOLLIN | EPOLLOUT)) { // Cand read or write.
            int sock_error = 0;
            socklen_t socklen = sizeof(sock_error);
            if(getsockopt(sock_info->sock_fd, SOL_SOCKET, SO_ERROR, &sock_error, (socklen_t*)&socklen) == 0) {
                LOGV("Socket error:%d", sock_error);
            }

            if(sock_error) {
                LOGW("errno = %d", errno);
                if(sock_error == ECONNRESET|| errno == EAGAIN)
                {
                    //
                }
                else
                {
                    return;
                }
            }

            if(sock_info->sock_type == MBTK_SOCK_TCP) {
                struct tcp_info info;
                int len = sizeof(info);
                if(getsockopt(sock_info->sock_fd, IPPROTO_TCP, TCP_INFO, &info, (socklen_t*)&len) == 0) {
                    LOGV("State : %d", info.tcpi_state);
#if TCPIP_DEBUG
                    //tcp_info_print(&info);
#endif
                }

                if(TCP_ESTABLISHED != info.tcpi_state) {
                    LOGW("errno = %d", errno);
                    int link_id = tcpip_fd_2_link(sock_info->sock_fd);
                    if(link_id >= 0) {
                        // Socket disconnected?
                        mbtk_tcpip_sock_close(link_id);

                        if(tcpip_sock_cb) {
                            tcpip_sock_cb(link_id, 0);
                        }
                    }
                    return;
                }
            }
        }

        if(sock_info->event & EPOLLIN) { // READ
            LOGV("fd[%d] can read.", sock_info->sock_fd);
            int link_id = tcpip_fd_2_link(sock_info->sock_fd);
            if(link_id >= 0) {
                if(tcpip_link[link_id].type == MBTK_TCPIP_TYPE_CLIENT) {
                    if(tcpip_link[link_id].tcpip_info.cli_info.read_cb) {
                        char buff[MBTK_TCPIP_READ_BUFF_SIZE];
                        memset(buff, 0x0, MBTK_TCPIP_READ_BUFF_SIZE);
                        int read_len = mbtk_sock_read_async(tcpip_handle, sock_info->sock_fd, buff, MBTK_TCPIP_READ_BUFF_SIZE);
                        if(read_len > 0) {
                            tcpip_link[link_id].tcpip_info.cli_info.data_traffic_recv += read_len;
                            tcpip_link[link_id].tcpip_info.cli_info.read_cb(link_id, (const char*)buff, read_len);
                        }
#if 0
                        else { // Socket error(Such as server disconnected.).
                            LOGW("errno = %d", errno);
                            // Socket disconnected?
                            mbtk_tcpip_sock_close(link_id);

                            if(tcpip_sock_cb) {
                                tcpip_sock_cb(link_id, 0);
                            }
                        }
#endif
                        while(read_len > 0) {
                            memset(buff, 0x0, MBTK_TCPIP_READ_BUFF_SIZE);
                            read_len = mbtk_sock_read_async(tcpip_handle, sock_info->sock_fd, buff, MBTK_TCPIP_READ_BUFF_SIZE);
                            // LOGD("read_len = %d", read_len);
                            if(read_len > 0) {
                                tcpip_link[link_id].tcpip_info.cli_info.data_traffic_recv += read_len;
                                tcpip_link[link_id].tcpip_info.cli_info.read_cb(link_id, (const char*)buff, read_len);
                            }
                        }
                    }
                } else {
                    // Not support.

                }
            }
        } else if(sock_info->event & EPOLLRDHUP) { // Close
            LOGD("fd[%d] Closed?", sock_info->sock_fd);
        } else {
            LOGW("Unknown event:%x",sock_info->event);
        }
    }
}

static void tcpip_net_cb_func(mbtk_sock_handle handle, mbtk_net_cb_info_s *info)
{
    if(tcpip_inited && tcpip_handle == handle) {
        LOGD("Net state : %d, %s, %s", info->state, info->if_name, info->addr);
        if(info->state == 0) {
            mbtk_tcpip_net_close();
        }

        if(tcpip_net_cb) {
            tcpip_net_cb(info->state, info->addr);
        }
    }
}

static bool tcpip_link_check(int link_id)
{
    if(tcpip_inited && link_id >= 0 && link_id < MBTK_TCPIP_LINK_MAX) {
        return TRUE;
    }

    return FALSE;
}

static bool tcpip_link_connected(int link_id)
{
    if(!tcpip_link_check(link_id)) {
        return FALSE;
    }

    if(!tcpip_link[link_id].link_connected) {
        return FALSE;
    }

    return TRUE;
}

static int tcpip_link_reset(mbtk_tcpip_link_t *link, int link_id)
{
    if(link) {
        // Close socket if necessary.
        if(link->link_connected) {
            if(link->type == MBTK_TCPIP_TYPE_CLIENT) {
                if(link->tcpip_info.cli_info.sock_fd > 0) {
                    int err;
                    if(mbtk_sock_close(tcpip_handle, link->tcpip_info.cli_info.sock_fd, 3000, &err) == 0
                        && err == MBTK_SOCK_SUCCESS) {
                        LOGD("Close socket[%d] success.", link->tcpip_info.cli_info.sock_fd);
                    } else {
                        LOGE("Close socket[%d] fail.", link->tcpip_info.cli_info.sock_fd);
                        return -1;
                    }
                }
            } else {
                // Not support.

                return -1;
            }
        }

        memset(link, 0x0, sizeof(mbtk_tcpip_link_t));
        link->link_id = link_id;
        link->link_cid = MBTK_TCPIP_CID_DEFAULT;
        return 0;
    }

    return -1;
}

mbtk_tcpip_err_enum mbtk_tcpip_net_open(mbtk_tcpip_net_callback_func net_cb, mbtk_tcpip_sock_callback_func sock_cb)
{
    if(tcpip_inited) {
        LOGW("TCP/IP has inited.");
        return MBTK_TCPIP_ERR_SUCCESS;
    } else {
        //mbtk_log_init("radio", "MBTK_TCPIP");
        mbtk_net_state_t net_state = mbtk_net_state_get();
        if(net_state == MBTK_NET_STATE_OFF) {
            LOGE("Network unavailable.");
            return MBTK_TCPIP_ERR_NET_UNAVAILABLE;
        }

        memset(&tcpip_link, 0x0, sizeof(mbtk_tcpip_link_t) * MBTK_TCPIP_LINK_MAX);
        int i = 0;
        for(; i < MBTK_TCPIP_LINK_MAX; i++) {
            tcpip_link_reset(tcpip_link + i, i);
        }

        mbtk_init_info init_info;
        init_info.net_type = MBTK_NET_LINUX;
        init_info.net_cb = tcpip_net_cb_func;
        init_info.sock_cb = tcpip_sock_cb_func;
        sprintf(init_info.if_name, "ccinet%d", MBTK_TCPIP_CID_DEFAULT);
        tcpip_handle = mbtk_sock_init(&init_info);
        if(tcpip_handle < 0) {
            LOGE("mbtk_sock_init() fail.");
            return MBTK_TCPIP_ERR_NET_HANDLE;
        }

        tcpip_net_cb = net_cb;
        tcpip_sock_cb = sock_cb;
        tcpip_inited = TRUE;
        return MBTK_TCPIP_ERR_SUCCESS;
    }
}

mbtk_tcpip_err_enum mbtk_tcpip_net_close()
{
    if(tcpip_inited) {
        int i = 0;
        mbtk_tcpip_err_enum tcpip_err = MBTK_TCPIP_ERR_SUCCESS;

        // Close all socket.
        for(; i < MBTK_TCPIP_LINK_MAX; i++) {
            if(tcpip_link_reset(tcpip_link + i, i)) {
                tcpip_err = MBTK_TCPIP_ERR_UNKNOWN;
            }
        }

        if(tcpip_err == MBTK_TCPIP_ERR_SUCCESS) {
            tcpip_inited = FALSE;
        }
        return tcpip_err;
    } else {
        LOGW("TCP/IP not inited.");
        return MBTK_TCPIP_ERR_SUCCESS;
    }
}

mbtk_tcpip_err_enum mbtk_tcpip_sock_open(const mbtk_tcpip_info_t *tcpip_info)
{
    if(tcpip_info == NULL || strlen(tcpip_info->ser_addr) == 0 || tcpip_info->ser_port <= 0) {
        LOGE("ARG error.");
        return MBTK_TCPIP_ERR_ARG;
    }

    if(!tcpip_link_check(tcpip_info->link_id)) {
        LOGE("Link[%d] error.", tcpip_info->link_id);
        return MBTK_TCPIP_ERR_LINK_UNAVAILABLE;
    }

    if(tcpip_link_connected(tcpip_info->link_id)) {
        LOGE("Link[%d] has connected.", tcpip_info->link_id);
        return MBTK_TCPIP_ERR_LINK_UNAVAILABLE;
    }

    if(tcpip_info->tcpip_type == MBTK_TCPIP_TYPE_CLIENT) {
        mbtk_tcpip_link_t *link = tcpip_link + tcpip_info->link_id;

        int err;
        mbtk_sock_info sock_info;
        memset(&sock_info, 0x0, sizeof(mbtk_sock_info));
        sock_info.type = tcpip_info->prot_type;
        sock_info.is_support_ssl = tcpip_info->ssl_support;
        sock_info.ingnore_cert = tcpip_info->ignore_cert;
        memcpy(sock_info.address, tcpip_info->ser_addr, strlen(tcpip_info->ser_addr));
        sock_info.port = tcpip_info->ser_port;
        sock_info.local_port = tcpip_info->local_port;

        link->tcpip_info.cli_info.sock_fd = mbtk_sock_open(tcpip_handle, &sock_info, 3000, &err);
        if(link->tcpip_info.cli_info.sock_fd > 0) {
            link->prot_type = tcpip_info->prot_type;
            link->type = MBTK_TCPIP_TYPE_CLIENT;
            memcpy(link->tcpip_info.cli_info.ser_addr, tcpip_info->ser_addr, strlen(tcpip_info->ser_addr));
            link->tcpip_info.cli_info.ser_port = tcpip_info->ser_port;
            link->tcpip_info.cli_info.local_port = tcpip_info->local_port;
            link->tcpip_info.cli_info.ack_support = tcpip_info->ack_support;
            link->tcpip_info.cli_info.ssl_support = tcpip_info->ssl_support;
            link->tcpip_info.cli_info.ignore_cert = tcpip_info->ignore_cert;
            link->tcpip_info.cli_info.heartbeat_time = tcpip_info->heartbeat_time;
            link->tcpip_info.cli_info.delay_time = tcpip_info->delay_time;
            link->tcpip_info.cli_info.read_cb = tcpip_info->read_cb;
            link->link_connected = TRUE;
            LOGD("Open socket[%d] success.");
            return MBTK_TCPIP_ERR_SUCCESS;
        } else {
            LOGE("Open socket[%d] fail.");
            return MBTK_TCPIP_ERR_UNKNOWN;
        }
    } else {
        LOGE("Only support CLIENT now!");
        return MBTK_TCPIP_ERR_UNKNOWN;
    }
}

mbtk_tcpip_err_enum mbtk_tcpip_sock_close(int link_id)
{
    if(!tcpip_link_connected(link_id)) {
        LOGE("Link[%d] not connected.", link_id);
        return MBTK_TCPIP_ERR_LINK_NOT_CONNECT;
    }

    if(tcpip_link_reset(tcpip_link + link_id, link_id)) {
        LOGE("Close link[%d] fail.", link_id);
        return MBTK_TCPIP_ERR_UNKNOWN;
    }

    return MBTK_TCPIP_ERR_SUCCESS;
}

int mbtk_tcpip_send(int link_id, const char* data, int data_len, const char* ser_addr, int ser_port)
{
    if(!tcpip_link_connected(link_id)) {
        LOGE("Link[%d] not connected.", link_id);
        return -1;
    }

    if(tcpip_link[link_id].type == MBTK_TCPIP_TYPE_CLIENT) {
        int err;
        int len = mbtk_sock_write(tcpip_handle, tcpip_link[link_id].tcpip_info.cli_info.sock_fd,
                    data, data_len, 3000, &err);
        if(len > 0) {
            tcpip_link[link_id].tcpip_info.cli_info.data_traffic_send += len;
        }
        return len;
    } else {
        // Not support.
        return -1;
    }

    return 0;
}

int mbtk_tcpip_read(int link_id, char* buff, int buff_size)
{
    if(!tcpip_link_connected(link_id)) {
        LOGE("Link[%d] not connected.", link_id);
        return -1;
    }

    if(tcpip_link[link_id].type == MBTK_TCPIP_TYPE_CLIENT) {
        if(tcpip_handle, tcpip_link[link_id].tcpip_info.cli_info.read_cb) {
            LOGE("Set read_cb function,can not manual read.");
            return -1;
        }
        int len = mbtk_sock_read_async(tcpip_handle, tcpip_link[link_id].tcpip_info.cli_info.sock_fd,
                    buff, buff_size);
        if(len > 0) {
            tcpip_link[link_id].tcpip_info.cli_info.data_traffic_recv += len;
        }
        return len;
    } else {
        // Not support.
        return -1;
    }
}

/*
* Get the data traffic of the specified link. Return -1 if fail.
*/
int mbtk_tcpip_data_traffic_get(int link_id)
{
    if(!tcpip_link_connected(link_id)) {
        LOGE("Link[%d] not connected.", link_id);
        return -1;
    }

    if(tcpip_link[link_id].type == MBTK_TCPIP_TYPE_CLIENT) {
        return tcpip_link[link_id].tcpip_info.cli_info.data_traffic_recv
                + tcpip_link[link_id].tcpip_info.cli_info.data_traffic_send;
    } else {
        // Not support.
        return -1;
    }
}

/*
* Reset the data traffic of the specified link.
*/
mbtk_tcpip_err_enum mbtk_tcpip_data_traffic_reset(int link_id)
{
    if(!tcpip_link_connected(link_id)) {
        LOGE("Link[%d] not connected.", link_id);
        return MBTK_TCPIP_ERR_LINK_NOT_CONNECT;
    }

    if(tcpip_link[link_id].type == MBTK_TCPIP_TYPE_CLIENT) {
        tcpip_link[link_id].tcpip_info.cli_info.data_traffic_recv = 0;
        tcpip_link[link_id].tcpip_info.cli_info.data_traffic_send = 0;
        return MBTK_TCPIP_ERR_SUCCESS;
    } else {
        // Not support.

    }

    return MBTK_TCPIP_ERR_UNKNOWN;
}

/*
* Return 0 if disconnected, 1 for connected, other for fail.
*/
int mbtk_tcpip_link_state_get(int link_id)
{
    if(!tcpip_link_check(link_id)) {
        LOGE("Link error.");
        return -1;
    }

    return tcpip_link[link_id].link_connected ? 1 : 0;
}

/*
* Get TCP state informations.
*/
int mbtk_tcpip_info_get(int link_id, mbtk_tcpip_tcp_state_info_s *state_info)
{
    if(!tcpip_link_check(link_id)) {
        LOGE("Link error.");
        return -1;
    }

    if(state_info == NULL) {
        LOGE("ARG error.");
        return -1;
    }

    memset(state_info, 0x0, sizeof(mbtk_tcpip_tcp_state_info_s));

    struct tcp_info info;
    memset(&info, 0x0, sizeof(struct tcp_info));
    int len = sizeof(info);
    if(tcpip_link[link_id].prot_type == MBTK_SOCK_TCP) {
        if(getsockopt(tcpip_link[link_id].tcpip_info.cli_info.sock_fd, IPPROTO_TCP, TCP_INFO, &info, (socklen_t*)&len)) {
            LOGE("Get TCP_INFO fail:%d", errno);
            return -1;
        }

#if TCPIP_DEBUG
        tcp_info_print(&info);
#endif
        state_info->state = info.tcpi_state;
    } else {
        state_info->state = 0;
    }

#if TCPIP_DEBUG
    int rcvbuf_size;
    len = sizeof(rcvbuf_size);
    if(getsockopt(tcpip_link[link_id].tcpip_info.cli_info.sock_fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf_size, (socklen_t*)&len)) {
        LOGE("Get SO_RCVBUF fail:%d", errno);
        return -1;
    }
    LOGD("SO_RCVBUF = %d", rcvbuf_size);

    int sndbuf_size;
    len = sizeof(sndbuf_size);
    if(getsockopt(tcpip_link[link_id].tcpip_info.cli_info.sock_fd, SOL_SOCKET, SO_SNDBUF, &sndbuf_size, (socklen_t*)&len)) {
        LOGE("Get SO_SNDBUF fail:%d", errno);
        return -1;
    }
    LOGD("SO_SNDBUF = %d", sndbuf_size);

    int rcvlowat_size;
    len = sizeof(rcvlowat_size);
    if(getsockopt(tcpip_link[link_id].tcpip_info.cli_info.sock_fd, SOL_SOCKET, SO_RCVLOWAT, &rcvlowat_size, (socklen_t*)&len)) {
        LOGE("Get SO_RCVLOWAT fail:%d", errno);
        return -1;
    }
    LOGD("SO_RCVLOWAT = %d", rcvlowat_size);

    int sndlowat_size;
    len = sizeof(sndlowat_size);
    if(getsockopt(tcpip_link[link_id].tcpip_info.cli_info.sock_fd, SOL_SOCKET, SO_SNDLOWAT, &sndlowat_size, (socklen_t*)&len)) {
        LOGE("Get SO_SNDLOWAT fail:%d", errno);
        return -1;
    }
    LOGD("SO_SNDLOWAT = %d", sndlowat_size);
#endif

    state_info->link_id = link_id;
    state_info->sock_fd = tcpip_link[link_id].tcpip_info.cli_info.sock_fd;
    state_info->recv_data_len = mbtk_sock_tcp_recv_len_get(tcpip_handle, tcpip_link[link_id].tcpip_info.cli_info.sock_fd);

    return 0;
}

/*
* Set socket auto read callback function,NULL for close auto read.
*/
void mbtk_tcpip_set_read_cb(int link_id, mbtk_tcpip_read_callback_func read_cb)
{
    if(!tcpip_link_check(link_id)) {
        LOGE("Link error.");
        return;
    }

    tcpip_link[link_id].tcpip_info.cli_info.read_cb = read_cb;
}

void mbtk_tcpip_lib_info_print()
{
    MBTK_SOURCE_INFO_PRINT("mbtk_tcpip_lib");
}