player/Project/Src/rt-thread/examples/network/tcpserver.c

#include <rtthread.h>
#include <string.h>

#if !defined(SAL_USING_POSIX)
#error "Please enable SAL_USING_POSIX!"
#else
#include <sys/time.h>
#include <sys/select.h>
#endif
#include <sys/socket.h> /* ʹ<><CAB9>BSD socket<65><74><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>socket.hͷ<68>ļ<EFBFBD> */
#include "netdb.h"

#define DEBUG_TCP_SERVER

#define DBG_ENABLE
#define DBG_SECTION_NAME               "TCP"
#ifdef DEBUG_TCP_SERVER
#define DBG_LEVEL                      DBG_LOG
#else
#define DBG_LEVEL                      DBG_INFO /* DBG_ERROR */
#endif
#define DBG_COLOR
#include <rtdbg.h>

#define BUFSZ       (1024)

static int started = 0;
static int is_running = 0;
static int port = 5000;
static const char send_data[] = "This is TCP Server from RT-Thread."; /* <20><><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */

static void tcpserv(void *arg)
{
    int ret;
    char *recv_data; /* <20><><EFBFBD>ڽ<EFBFBD><DABD>յ<EFBFBD>ָ<EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ζ<EFBFBD>̬<EFBFBD><CCAC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD> */
    int sock, connected, bytes_received;
    struct sockaddr_in server_addr, client_addr;

    struct timeval timeout;
    fd_set readset, readset_c;
    socklen_t sin_size = sizeof(struct sockaddr_in);

    recv_data = rt_malloc(BUFSZ + 1); /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD> */
    if (recv_data == RT_NULL)
    {
        LOG_E("No memory");
        return;
    }

    /* һ<><D2BB>socket<65><74>ʹ<EFBFBD><CAB9>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ҪԤ<D2AA>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8>SOCK_STREAMΪTCP<43><50>socket */
    if ((sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
    {
        LOG_E("Create socket error");
        goto __exit;
    }

    /* <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD>ַ */
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port); /* <20><><EFBFBD><EFBFBD><EFBFBD>˹<EFBFBD><CBB9><EFBFBD><EFBFBD>Ķ˿<C4B6> */
    server_addr.sin_addr.s_addr = INADDR_ANY;
    rt_memset(&(server_addr.sin_zero), 0x0, sizeof(server_addr.sin_zero));

    /* <20><><EFBFBD><EFBFBD>socket<65><74><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD>ַ */
    if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
    {
        LOG_E("Unable to bind");
        goto __exit;
    }

    /* <20><>socket<65>Ͻ<EFBFBD><CFBD>м<EFBFBD><D0BC><EFBFBD> */
    if (listen(sock, 10) == -1)
    {
        LOG_E("Listen error");
        goto __exit;
    }

    LOG_I("\nTCPServer Waiting for client on port %d...\n", port);

    started = 1;
    is_running = 1;

    timeout.tv_sec = 3;
    timeout.tv_usec = 0;

    while (is_running)
    {
        FD_ZERO(&readset);
        FD_SET(sock, &readset);

        LOG_I("Waiting for a new connection...");

        /* Wait for read or write */
        if (select(sock + 1, &readset, RT_NULL, RT_NULL, &timeout) == 0)
            continue;

        /* <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ͻ<EFBFBD><CDBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>socket<65><74><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><CABD> */
        connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
        /* <20><><EFBFBD>ص<EFBFBD><D8B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳɹ<D3B3><C9B9><EFBFBD>socket */
        if (connected < 0)
        {
            LOG_E("accept connection failed! errno = %d", errno);
            continue;
        }

        /* <20><><EFBFBD>ܷ<EFBFBD><DCB7>ص<EFBFBD>client_addrָ<72><D6B8><EFBFBD>˿ͻ<CBBF><CDBB>˵ĵ<CBB5>ַ<EFBFBD><D6B7>Ϣ */
        LOG_I("I got a connection from (%s , %d)\n",
                   inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));

        /* <20>ͻ<EFBFBD><CDBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵĴ<D3B5><C4B4><EFBFBD> */
        while (is_running)
        {
            FD_ZERO(&readset_c);
            FD_SET(connected, &readset_c);

            /* Wait for read or write */
            if (select(connected + 1, &readset_c, RT_NULL, RT_NULL, &timeout) == 0)
                continue;

            /* <20><>connected socket<65>н<EFBFBD><D0BD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><DDA3><EFBFBD><EFBFBD><EFBFBD>buffer<65><72>1024<32><34>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ܹ<EFBFBD><DCB9>յ<EFBFBD>1024<32><34>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
            bytes_received = recv(connected, recv_data, BUFSZ, 0);
            if (bytes_received < 0)
            {
                LOG_E("Received error, close the connect.");
                closesocket(connected);
                connected = -1;
                break;
            }
            else if (bytes_received == 0)
            {
                /* <20><>ӡrecv<63><76><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ0<CEAA>ľ<EFBFBD><C4BE><EFBFBD><EFBFBD><EFBFBD>Ϣ */
                LOG_W("Received warning, recv function return 0.");
                continue;
            }
            else
            {
                /* <20>н<EFBFBD><D0BD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD>ݣ<EFBFBD><DDA3><EFBFBD>ĩ<EFBFBD><C4A9><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
                recv_data[bytes_received] = '\0';
                if (strcmp(recv_data, "q") == 0 || strcmp(recv_data, "Q") == 0)
                {
                    /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><C4B8>q<EFBFBD><71>Q<EFBFBD><51><EFBFBD>ر<EFBFBD><D8B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
                    LOG_I("Got a 'q' or 'Q', close the connect.");
                    closesocket(connected);
                    connected = -1;
                    break;
                }
                else if (strcmp(recv_data, "exit") == 0)
                {
                    /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>յ<EFBFBD><D5B5><EFBFBD>exit<69><74><EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD><D8B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
                    closesocket(connected);
                    connected = -1;
                    goto __exit;
                }
                else
                {
                    /* <20>ڿ<EFBFBD><DABF><EFBFBD><EFBFBD>ն<EFBFBD><D5B6><EFBFBD>ʾ<EFBFBD>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
                    LOG_D("Received data = %s", recv_data);
                }
            }

            /* <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>connected socket */
            ret = send(connected, send_data, rt_strlen(send_data), 0);
            if (ret < 0)
            {
                LOG_E("send error, close the connect.");
                closesocket(connected);
                connected = -1;
                break;
            }
            else if (ret == 0)
            {
                /* <20><>ӡsend<6E><64><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ0<CEAA>ľ<EFBFBD><C4BE><EFBFBD><EFBFBD><EFBFBD>Ϣ */
                LOG_W("Send warning, send function return 0.");
            }
        }
    }

__exit:
    if (recv_data)
    {
        rt_free(recv_data);
        recv_data = RT_NULL;
    }
    if (connected >= 0)
    {
        closesocket(connected);
        connected = -1;
    }
    if (sock >= 0)
    {
        closesocket(sock);
        sock = -1;
    }
    started = 0;
    is_running = 0;
    return;
}

static void usage(void)
{
    rt_kprintf("Usage: tcpserver -p <port>\n");
    rt_kprintf("       tcpserver --stop\n");
    rt_kprintf("       tcpserver --help\n");
    rt_kprintf("\n");
    rt_kprintf("Miscellaneous:\n");
    rt_kprintf("  -p           Specify the host port number\n");
    rt_kprintf("  --stop       Stop tcpserver program\n");
    rt_kprintf("  --help       Print help information\n");
}

static void tcpserver_test(int argc, char** argv)
{
    rt_thread_t tid;

    if (argc == 1 || argc > 3)
    {
        LOG_I("Please check the command you entered!\n");
        goto __usage;
    }
    else
    {
        if (rt_strcmp(argv[1], "--help") == 0)
        {
            goto __usage;
        }
        else if (rt_strcmp(argv[1], "--stop") == 0)
        {
            is_running = 0;
            return;
        }
        else if (rt_strcmp(argv[1], "-p") == 0)
        {
            if (started)
            {
                LOG_I("The tcpclient has started!");
                LOG_I("Please stop tcpclient firstly, by: tcpclient --stop");
                return;
            }

            port = atoi(argv[2]);
        }
        else
        {
            goto __usage;
        }
    }

    tid = rt_thread_create("tcp_serv",
        tcpserv, RT_NULL,
        2048, RT_THREAD_PRIORITY_MAX/3, 20);
    if (tid != RT_NULL)
    {
        rt_thread_startup(tid);
    }
    return;

__usage:
    usage();
}

#ifdef RT_USING_FINSH
MSH_CMD_EXPORT_ALIAS(tcpserver_test, tcpserver,
    Start a tcp server. Help: tcpserver --help);
#endif