/*
*
* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#define _GNU_SOURCE
#include <sys/socket.h>
#include <fcntl.h>
#include <memory.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <time.h>
#include <linux/tcp.h>
#include <sched.h>
#include <pthread.h>
#include <arpa/inet.h>
#include <sys/epoll.h>
#include <errno.h>

#define _BIND bind
#define _LISTEN listen
#define _SOCKET socket
#define _ACCEPT accept
#define _SEND send
#define _RECV recv
#define _CLOSE close
#define _CONNECT connect
#define _PROTOCOL IPPROTO_TCP

#define MAX_TEST_TIME 1000
#define MSG_LENGTH 256
#define CORE_NUM 8
#define START_CPU_ID 2
#define MAX_CONN_LIMIT 256
#define MAX_PORT_NUM 65535
//1:A-B ;0:A-B-A
#define SEND_RECV_MODE 1
#define MAX_EVENTS 1000
#define Default_PortID 12345
#define Default_SleepCnt 10000
#define Default_SleepTime 1000000
#define  Flag_Print 1
#define  Fd_Number 1

static struct sockaddr_in g_dest;
static struct sockaddr_in g_src;
static struct sockaddr_in g_recv;

int times = MAX_TEST_TIME;
int msg_length = MSG_LENGTH;
int coreNum = CORE_NUM;
int startCPUId = START_CPU_ID;
int connectNum = MAX_CONN_LIMIT;
int msgMode = SEND_RECV_MODE;
int sleepCnt = Default_SleepCnt;
int sleepTime = Default_SleepTime;      //us
int fdNumber = Fd_Number;
int flagPrint = Flag_Print;
int unitPrint = 0;
int waitTime = 0;

int srcPort = Default_PortID;
int destPort = 0;
int recvPort = 0;
char sendarr[256] = "";
char recvarr[256] = "";
char destarr[256] = "";

static void setArgsDefault()
{

    memset(&g_dest, 0, sizeof(g_dest));
    g_dest.sin_family = AF_INET;
    g_dest.sin_addr.s_addr = inet_addr("127.0.0.1");
    g_dest.sin_port = htons(12345);
    bzero(&(g_dest.sin_zero), 8);

    memset(&g_src, 0, sizeof(g_src));
    g_src.sin_family = AF_INET;
    g_src.sin_addr.s_addr = inet_addr("0.0.0.0");
    g_src.sin_port = htons(7895);
    bzero(&(g_src.sin_zero), 8);

    memset(&g_recv, 0, sizeof(g_recv));
    g_recv.sin_family = AF_INET;
    g_recv.sin_addr.s_addr = inet_addr("0.0.0.0");
    g_recv.sin_port = htons(7895);
    bzero(&(g_recv.sin_zero), 8);

}

static int process_arg(int argc, char *argv[])
{
    int opt = 0;
    int error = 0;
    const char *optstring = "p:d:s:a:l:t:e:i:f:r:n:w:u:x:";
    int rw_mark = 0;

    if (argc < 4)
    {
        printf
            ("Param info :-p dest_portid; -d dest_serverIP; -a src_portid; -s src_clientIP; -l msg_length; \n");
        printf
            ("\t-t MAX_TEST_TIME; -i  msg_interval ; -f  client fd number ; -r receive port; -n connectNum(one server vs n client)\n");
        return 0;
    }
    while ((opt = getopt(argc, argv, optstring)) != -1)
    {
        switch (opt)
        {
            case 'p':
                destPort = atoi(optarg);
                g_dest.sin_port = htons(atoi(optarg));
                break;
            case 'd':
                stpcpy(destarr, optarg);
                g_dest.sin_addr.s_addr = inet_addr(optarg);
                break;
            case 's':
                stpcpy(sendarr, optarg);
                g_src.sin_addr.s_addr = inet_addr(optarg);
                g_recv.sin_addr.s_addr = inet_addr(optarg);
                break;
            case 'a':
                //g_src.sin_port = htons(atoi(optarg));
                srcPort = atoi(optarg);
                break;
            case 'l':
                msg_length = atoi(optarg);
                break;
            case 't':
                times = atoi(optarg);
                break;
            case 'e':
                sleepCnt = atoi(optarg);
                break;
            case 'i':
                sleepTime = atoi(optarg);
                break;
            case 'f':
                fdNumber = atoi(optarg);
                break;
            case 'r':
                recvPort = atoi(optarg);
                g_recv.sin_port = htons(atoi(optarg));
                break;
            case 'n':
                connectNum = atoi(optarg);
                break;
            case 'w':
                waitTime = atoi(optarg);
                break;
            case 'u':
                unitPrint = atoi(optarg);
                break;
            case 'x':
                flagPrint = atoi(optarg);
                break;

        }
    }
    return 1;
}

void process_client(void)
{
    int sendLen = 0;
    int i = 0, t = 0, p = 0, optval = 0, ret = 0;
    char send_buf[1000] = "";
    char recv_buf[1000] = "";
    int c_socketfd[100] = { 0 };
    int errbind[1000] = { 0 };
    int errconn[1000] = { 0 };

    int send_count[1000] = { 0 };
    int pps = 0;
    long pps_time = 0;

    struct timespec startTime, endTime;
    struct timespec countStart;
    struct timespec countEnd;
    memset(&countStart, 0, sizeof(countStart));
    memset(&countEnd, 0, sizeof(countEnd));

    for (i = 0; i < fdNumber; i++)
    {
        c_socketfd[i] = _SOCKET(PF_INET, SOCK_STREAM, _PROTOCOL);
        if (0 > c_socketfd[i])
        {
            printf("client %d failed,err %d\n", i, errno);
        }
        else
        {
            printf("client %d created success\n", i);
        }
    }

    for (i = 0; i < fdNumber; i++)
    {
        optval = 1;
        ret =
            setsockopt(c_socketfd[i], SOL_SOCKET, SO_REUSEADDR,
                       (void *) &optval, sizeof(optval));
        if (ret == -1)
        {
            printf("Couldn't setsockopt(SO_REUSEADDR)\n");
            break;
        }
    }

    for (i = 0; i < fdNumber; i++)
    {
        g_src.sin_port = htons(srcPort + i);
        errbind[i] =
            _BIND(c_socketfd[i], (struct sockaddr *) &g_src, sizeof(g_src));
        if (errbind[i] < 0)
        {
            printf("client %d bind Failed %d\n", i, errno);
            _CLOSE(c_socketfd[i]);
            c_socketfd[i] = -1;
            continue;
        }
        else
        {
            printf("client %d bind Success port:%d IP:%s\n", i,
                   ntohs(g_src.sin_port),
                   inet_ntoa(*((struct in_addr *) &(g_src.sin_addr.s_addr))));
        }
    }
    for (i = 0; i < fdNumber; i++)
    {
        if (errbind[i] >= 0)
        {
            errconn[i] =
                _CONNECT(c_socketfd[i], (struct sockaddr *) &g_dest,
                         sizeof(g_dest));
            if (errconn[i] < 0)
            {
                printf("client %d Connect Failed %s\n", i, strerror(errno));
                _CLOSE(c_socketfd[i]);
                c_socketfd[i] = -1;
                continue;
            }
            else
            {
                printf("client %d Connect Success port:%d, IP:%s\n", i,
                       ntohs(g_dest.sin_port),
                       inet_ntoa(*
                                 ((struct in_addr *)
                                  &(g_dest.sin_addr.s_addr))));
            }
        }
    }

    sleep(1);

    clock_gettime(CLOCK_MONOTONIC, &startTime);
    clock_gettime(CLOCK_MONOTONIC, &countStart);

    int recvLen2, recvLen;
    for (t = 0; t < times; t++)
    {
        for (i = 0; i < fdNumber; i++)
        {
            if (c_socketfd[i] < 0)
            {
                continue;
            }
            do
            {
                sendLen = _SEND(c_socketfd[i], send_buf, msg_length, 0);
            }
            while (sendLen <= 0);
            send_count[i]++;
            recvLen = 0;
            do
            {
                recvLen2 =
                    recv(c_socketfd[i], recv_buf + recvLen,
                         msg_length - recvLen, 0);
                if (recvLen2 <= 0)
                {
                    continue;
                }
                else if (recvLen2 == msg_length - recvLen)
                {
                    recvLen = 0;
                    break;
                }
                else if (recvLen2 < msg_length - recvLen)
                {
                    recvLen += recvLen2;
                }
            }
            while (1);
        }

        if (0 != sleepTime)
        {
            if ((t % sleepCnt) == 0)
            {
                usleep(sleepTime);
            }
        }

        if ((send_count[0] % unitPrint) == 0 && send_count[0] > 0)
        {
            clock_gettime(CLOCK_MONOTONIC, &countEnd);

            pps_time =
                (countEnd.tv_sec - countStart.tv_sec) * 1000000000 +
                countEnd.tv_nsec - countStart.tv_nsec;
            pps = ((float) 1000000000 / pps_time) * unitPrint * fdNumber;
            if ((flagPrint != 0))
            {
                printf(" sendcount %d, time: %ld ns\n",
                       send_count[0] * fdNumber, pps_time);
            }
            printf("sendcount %d , pps=%d\n", send_count[0] * fdNumber, pps);
            clock_gettime(CLOCK_MONOTONIC, &countStart);
        }
    }

    clock_gettime(CLOCK_MONOTONIC, &endTime);

    for (i = 0; i < fdNumber; i++)
    {
        printf("client %d send %d , sendtime :%ld s %ld ns\n", i,
               send_count[i], endTime.tv_sec - startTime.tv_sec,
               endTime.tv_nsec - startTime.tv_nsec);
    }

    for (i = 0; i < fdNumber; i++)
    {
        printf("client %d close!\n", i);
        if (c_socketfd[i] > 0)
            _CLOSE(c_socketfd[i]);
    }

    pthread_exit(NULL);
}

void main(int argc, char *argv[])
{
    socklen_t addrlen = sizeof(struct sockaddr);
    int err = 0, result = 0, ret = 0;
    int i = 0, j = 0, optval = 0, z = 0, x, listenfd;
    cpu_set_t mask;

    setArgsDefault();
    ret = process_arg(argc, argv);
    if (ret != 1)
    {
        printf("The param error\n");
        return;
    }

    pthread_t client_thread_id;

    if (pthread_create
        (&client_thread_id, NULL, (void *) (&process_client), NULL) == -1)
    {
        printf("create client thread fail\n");
        return;
    }

    printf("create client thread success\n");

    if (client_thread_id != 0)
    {
        printf("Client Thread join\n");
        pthread_join(client_thread_id, NULL);
    }

    return;
}