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分类: 嵌入式

2018-06-15 17:35:32

/************************************
 * For msmr
 * server.c
 * tesing the speed of bufferevent_write
 * 2015-02-03
 * author@tom
************************************/
/*
#include
#include
#include
#include
#include
#include
#include
#include
evutil_socket_t fd;
static void server_on_read(struct bufferevent* bev,void* arg){
    struct timeval start_t;
  //  int sockfd;
    gettimeofday(&start_t,NULL);
    printf("Warning: server_on_read start timestamp  %lu.%06lu\n", start_t.tv_sec, start_t.tv_usec);
 
    struct evbuffer* input = bufferevent_get_input(bev);
    size_t len = 0;
    len = evbuffer_get_length(input);
    printf("There Is %u Bytes Data In The Buffer In Total.\n",
            (unsigned)len);
    
    // read
    char* buf;
    buf = (char*)malloc(sizeof(char)*len);
    if(NULL==buf){return;}
    //evbuffer_copyout(input,buf,len); // it do not clear the input buffer
    evbuffer_remove(input,buf,len); // clear the buffer
    printf("Server gets the message from client: %s\n", buf);  

  //  write(bev, "OK", 2);  
    send(fd,"OK",2+1,0);
    // check
    len = 0;
    len = evbuffer_get_length(input);
    printf("After the first reading, there Is %u Bytes Data Left In The Buffer.\n",
            (unsigned)len);
    
    free(buf);
    buf=NULL;
    return;
}


void server_on_accept(struct evconnlistener* listener,evutil_socket_t fd,struct sockaddr *address,int socklen,void *arg)
{
    printf("accept a client : %d\n", fd);

    // set TCP_NODELAY
    int enable = 1;
    if(setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&enable, sizeof(enable)) < 0)
        printf("Consensus-side: TCP_NODELAY SETTING ERROR!\n");

    struct event_base *base = evconnlistener_get_base(listener);
    struct bufferevent* new_buff_event = bufferevent_socket_new(base,fd,BEV_OPT_CLOSE_ON_FREE);
    // bufferevent_setwatermark(new_buff_event, EV_READ, 72, 0);
    bufferevent_setcb(new_buff_event,server_on_read,NULL,NULL,NULL);
    // set a read timeout of 1000 us
    // struct timeval tv = {0, 10000};
    // bufferevent_set_timeouts(new_buff_event, &tv, NULL);
    bufferevent_enable(new_buff_event,EV_READ|EV_WRITE);

    return;
}

int main()
{
    int port = 9876;
    struct sockaddr_in my_address;
    memset(&my_address, 0, sizeof(my_address));
    my_address.sin_family = AF_INET;
    my_address.sin_addr.s_addr = htonl(0x7f000001); // 127.0.0.1
    my_address.sin_port = htons(port);

    struct event_base* base = event_base_new();
    struct evconnlistener* listener =
        evconnlistener_new_bind(base,server_on_accept,
                NULL,LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,-1,
                (struct sockaddr*)&my_address,sizeof(my_address));

    if(!listener)
        exit(1);

    event_base_dispatch(base);
    evconnlistener_free(listener);
    event_base_free(base);
 
    return 0;
}
*/
#include     // for sockaddr_in
#include     // for socket
#include     // for socket
#include         // for printf
#include         // for exit
#include         // for bzero
/*
#include
#include
#include
#include
*/
#define HELLO_WORLD_SERVER_PORT    9876
#define LENGTH_OF_LISTEN_QUEUE 20
#define BUFFER_SIZE 1024
#define FILE_NAME_MAX_SIZE 512
 
int main(int argc, char **argv)
{
    //设置一个socket地址结构server_addr,代表服务器internet地址, 端口
    int rec_flag;
    struct sockaddr_in server_addr;
    bzero(&server_addr,sizeof(server_addr)); //把一段内存区的内容全部设置为0
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htons(INADDR_ANY);
    server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
 
    //创建用于internet的流协议(TCP)socket,用server_socket代表服务器socket
    int server_socket = socket(PF_INET,SOCK_STREAM,0);
    if( server_socket < 0)
    {
        printf("Create Socket Failed!");
        exit(1);
    }
{
   int opt =1;
   setsockopt(server_socket,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
}
     
    //把socket和socket地址结构联系起来
    if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr)))
    {
        printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT);
        exit(1);
    }
 
    //server_socket用于监听
    if ( listen(server_socket, LENGTH_OF_LISTEN_QUEUE) )
    {
        printf("Server Listen Failed!");
        exit(1);
    }
    while (1) //服务器端要一直运行
    {
        //定义客户端的socket地址结构client_addr
        struct sockaddr_in client_addr;
        socklen_t length = sizeof(client_addr);
 
        //接受一个到server_socket代表的socket的一个连接
        //如果没有连接请求,就等待到有连接请求--这是accept函数的特性
        //accept函数返回一个新的socket,这个socket(new_server_socket)用于同连接到的客户的通信
        //new_server_socket代表了服务器和客户端之间的一个通信通道
        //accept函数把连接到的客户端信息填写到客户端的socket地址结构client_addr中
        int new_server_socket = accept(server_socket,(struct sockaddr*)&client_addr,&length);
        if ( new_server_socket < 0)
        {
            printf("Server Accept Failed!\n");
            break;
        }
         
        char buffer[BUFFER_SIZE];
        bzero(buffer, BUFFER_SIZE);
        length = recv(new_server_socket,buffer,BUFFER_SIZE,0);
        if (length < 0)
        {
            printf("Server Recieve Data Failed!\n");
            break;
        }
        char file_name[FILE_NAME_MAX_SIZE+1];
        bzero(file_name, FILE_NAME_MAX_SIZE+1);
        strncpy(file_name, buffer, strlen(buffer)>FILE_NAME_MAX_SIZE?FILE_NAME_MAX_SIZE:strlen(buffer));

        printf("%s\n",file_name);
    
            bzero(buffer, BUFFER_SIZE);
            int file_block_length = 0;
    if(length>0)
        rec_flag=1;
            while(rec_flag)
            {
                printf("file_block_length = %d\n",file_block_length);
                //发送buffer中的字符串到new_server_socket,实际是给客户端
                if(send(new_server_socket,"OK",2,0)<0)
                {
                    printf("Send File:\t%s Failed\n", file_name);
                    break;
                }
        rec_flag=0;
                bzero(buffer, BUFFER_SIZE);
        //sleep(5);
            }
//            close(fp);
          //  fclose(fp);
            printf("File:\t%s Transfer Finished\n",file_name);
       // }
        //关闭与客户端的连接
      //  close(new_server_socket);
    }
    //关闭监听用的socket
   // close(server_socket);
    return 0;
}
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