我正在尝试用 C++ 制作一个小型服务器，它可以简单地回显它通过无限带宽连接接收到的任何内容。我还在 Ubuntu 下使用套接字直接协议(protocol)和 POSIX 套接字。

不幸的是，我在互联网上找到的唯一建议是关于我应该如何使用 AF_INET_SDP 域创建套接字，就像这里一样:

#define AF_INET_SDP 27

int socketfd = socket(AF_INET_SDP, SOCK_STREAM, 0);

我设法绑定(bind)套接字，我调用了 listen(...) 函数，但服务器在尝试接受连接时挂起，而在客户端，我仅在尝试连接时收到超时。

我还有一个用 Java 编写的较旧的类似应用程序(客户端和服务器)，它通过 infiniband 进行通信并且工作正常。

谁能给我一个使用 infiniband 的应用程序示例，或者向我指出某种可以帮助我的文档？

谢谢。

最佳答案

这是一个如何使用infiniband的简单例子，希望对你有所帮助:

#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <errno.h>
#include <sys/select.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <pthread.h>
#include <time.h>

#define AF_INET_SDP 27


typedef struct
{
    pthread_attr_t threadattr;
    pthread_t threadid;
    int seq;
    int  fd;
    double sendbytes;
    double runtimes;
}CLIENTTHREADPARA;

CLIENTTHREADPARA * g_pClientThreadPara;


void signal_func(int no);
int SetSignal();

int g_listensock;
int g_bIsExit=0;

int g_packetsize;
int g_totalthread;
char * g_szIp;
int g_iPort;
int g_nDelayUsecs;

pthread_mutex_t g_mutex;


typedef struct
{
    pthread_attr_t threadattr;
    pthread_t threadid;
    int fd;
}THREADDATA;

static double time_so_far();
void * ThreadProc(void * pPara);
int RunServ(int iPort);
int RunClient(char * Ip,int iPort);
void * ClientThreadProc(void * pPara);

int main(int argc,char * argv[])
{
    int iPort;
    int thread_nums;

    SetSignal();

    if(argc != 3 && argc!=6)
    {
        goto err_out;
    }

    g_packetsize=atoi(argv[1]);

    if(argc==3)
    {
        iPort=atoi(argv[2]);
        if(iPort==0)
        {
            printf("socket port can not zero\n");
            return -1;
        }
        RunServ(iPort);
    }
    else if(argc==6)
    {
        g_szIp=argv[2];
        g_iPort=atoi(argv[3]);
        g_totalthread=atoi(argv[4]);
        g_nDelayUsecs=atoi(argv[5]);
        RunClient(argv[2],iPort);
    }
    return 0;

err_out:
    printf("For Server: sdptest <packet size> <port>\n");
    printf("For Client: sdptest <packet size> <ip> <port> <thread_nums> <delay microsecond>\n");
    return -1;
}

int RunClient(char * Ip,int iPort)
{
    int i;
    pthread_mutex_init(&g_mutex, (pthread_mutexattr_t *)0);

    g_pClientThreadPara=(CLIENTTHREADPARA *)malloc(sizeof(CLIENTTHREADPARA)*g_totalthread);
    for(i=0;i<g_totalthread;i++)
    {
        g_pClientThreadPara[i].seq=i;
        pthread_attr_init(&g_pClientThreadPara[i].threadattr);
        pthread_create(&g_pClientThreadPara[i].threadid, &g_pClientThreadPara[i].threadattr,ClientThreadProc,(void *)&g_pClientThreadPara[i]);
    }

    double sendbytes = 0;
    double pre_sendbytes=0;
    double pre_time = time_so_far();
    double current_time = time_so_far();

    while(!g_bIsExit)
    {
        sleep(1);
        pthread_mutex_lock(&g_mutex);
        sendbytes = g_pClientThreadPara[0].sendbytes;
        pthread_mutex_unlock(&g_mutex);
        current_time = time_so_far();        
        printf("speed is %10.2fMbytes/s,\n",(sendbytes - pre_sendbytes)/1024/1024/(current_time - pre_time));
        pre_sendbytes = sendbytes;
        pre_time = current_time;
    }

    for(i=0;i<g_totalthread;i++)
    {
        pthread_join(g_pClientThreadPara[i].threadid, NULL);
    }

    double totalspeed=0;
    double totaltimes=0;

    for(i=0;i<g_totalthread;i++)
    {

        totalspeed+=(double)g_pClientThreadPara[i].sendbytes/g_pClientThreadPara[i].runtimes;
    }
    printf("speed is %10.2fMbytes/s,total times is %.2f seconds\n",totalspeed/1024/1024,totaltimes/g_totalthread);
}

void * ClientThreadProc(void * pPara)
{

    CLIENTTHREADPARA * pThreadPara= (CLIENTTHREADPARA *)pPara;

    struct sockaddr_in  sin;
    int nRet;
    double starttime,endtime;
    int cnt_per_usec;
    char * buf;

    memset(&sin,0,sizeof(sin));
    sin.sin_family=AF_INET_SDP;
    sin.sin_port=htons(g_iPort);

    if((sin.sin_addr.s_addr = inet_addr(g_szIp)) == INADDR_NONE)
    {
        printf("Ip address %s is invalid!\n",g_szIp);
        return (void *)-1;
    }

    pThreadPara->fd = socket(AF_INET_SDP,SOCK_STREAM,0);
    if(pThreadPara->fd < 0)
    {
        perror("Create socket error");
        return (void *)-1;
    }

    nRet=connect(pThreadPara->fd,(struct sockaddr *)&sin,sizeof(sin));
    if(nRet<0)
    {

        printf("Can't connect to %s:%d\n",g_szIp,g_iPort);
        perror("sock error:");
        close(pThreadPara->fd);
        return (void *)-1;
    }

    buf=malloc(g_packetsize);
    starttime=time_so_far();

    pThreadPara->sendbytes=0;
    while(!g_bIsExit)
    {
        nRet=send(pThreadPara->fd,buf,g_packetsize,0);
        if(nRet<=0)
        {
            if(errno==EINTR)
            {
                continue;
            }
            else
            {
                printf("thread %d ",pThreadPara->seq);
                perror("sock error:");
                break;
            }
        }
        else
        {
            pthread_mutex_lock(&g_mutex);
            pThreadPara->sendbytes+=nRet;
            pthread_mutex_unlock(&g_mutex);
        }
        if (g_nDelayUsecs>0)
        {
            usleep(g_nDelayUsecs);
        }
    }
    endtime=time_so_far();
    pThreadPara->runtimes=endtime-starttime;
    close(pThreadPara->fd);
    free(buf);
    //printf("speed is %10.2fM/s\n",g_totalbytes/1024/1024/(endtime - starttime));
    return (void *)0;
}

int RunServ(int iPort)
{
    struct sockaddr_in my_addr;
    struct linger li; 
    int nRet;
    int fromclientfd;

    //0.init
    memset ((char *)&my_addr, 0, sizeof(struct sockaddr_in));
    my_addr.sin_family = AF_INET_SDP;
    my_addr.sin_port = htons(iPort);
    my_addr.sin_addr.s_addr = htonl(INADDR_ANY);

    //1.create
    g_listensock = socket(AF_INET_SDP, SOCK_STREAM, 0);
    if (g_listensock==-1)
    {
        return -1;
    }

    li.l_onoff = 1;
    li.l_linger = 0;

    int option=1;
    setsockopt(g_listensock,SOL_SOCKET, SO_REUSEADDR, (char*)&option, sizeof(option));
    setsockopt(g_listensock,SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(li));

    //2.bind
    nRet = bind(g_listensock, (struct sockaddr *)&my_addr, sizeof(struct sockaddr));
    if (nRet==-1)
    {
        printf("bind %d port error\n",iPort);
        return -1;
    }

    //3.listen
    nRet = listen(g_listensock, 10);
    if (nRet==-1)
    {
        printf("listen in port %d error!\n",iPort);
        return -1;
    }

    struct sockaddr_in from;
#if AIX || Linux
        socklen_t fromlen=sizeof(from);
#else
        int fromlen=sizeof(from);
#endif


    li.l_onoff = 1;
    li.l_linger = 3;
    while(!g_bIsExit)
    {
        fromclientfd = accept(g_listensock,(struct sockaddr *)&from,&fromlen);
        if (fromclientfd==-1)
        {
            close(g_listensock);
            printf("server is stoped.\n");
            break;;
        }

        setsockopt(fromclientfd,SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(li));
        THREADDATA * pThreadData=(THREADDATA *)malloc(sizeof(THREADDATA));
        pThreadData->fd=fromclientfd;
        pthread_attr_init(&pThreadData->threadattr);
        pthread_create (&pThreadData->threadid, &pThreadData->threadattr,ThreadProc,(void *)pThreadData);
    }
}

void * ThreadProc(void * pPara)
{
    THREADDATA * pThreadPara;
    pThreadPara=(THREADDATA *)pPara;
    int nRet;
    char * buf;
    double starttime,endtime;
    double totalbytes;

    buf=malloc(g_packetsize);
    if(buf==NULL)
    {
        close(pThreadPara->fd);
        printf("Canot not allocate memory!\n");
        return 0;
    }

    nRet=1;
    starttime=time_so_far();
    totalbytes=0;
    while (nRet>0 && !g_bIsExit)
    {
        nRet=recv(pThreadPara->fd ,buf,g_packetsize,0);
        if (nRet<=0)
        {
            break;
        }
        totalbytes+=nRet;
    }
    endtime=time_so_far();
    free(buf);
    free(pThreadPara);
    printf("speed is %10.2fM/s\n",totalbytes/1024/1024/(endtime - starttime));
    return 0;
}

static double time_so_far()
{
#if defined(SysV)
    int        val;
    struct tms tms;

    if ((val = times(&tms)) == -1)
    {
        printf("Call times() error\n");
    }
    return ((double) val) / ((double) sysconf(_SC_CLK_TCK));

#else

    struct timeval tp;

    if (gettimeofday(&tp, (struct timezone *) NULL) == -1)
    {
        printf("Call gettyimeofday error\n");
    }
    return ((double) (tp.tv_sec)) +
           (((double) tp.tv_usec) / 1000000.0);
#endif
}


int SetSignal()
{
    signal(SIGHUP, signal_func);
    signal(SIGQUIT, signal_func);
    signal(SIGBUS, SIG_DFL);

    signal(SIGURG,signal_func); 

    signal(SIGPIPE,SIG_IGN); 

    signal(SIGABRT,SIG_IGN); 

    signal(SIGTRAP,SIG_IGN);

    signal(SIGILL,signal_func); 
    //signal(SIGSEGV,signal_func); 

    //signal(SIGCHLD,SIG_IGN)

    signal(SIGTERM,signal_func); 
    signal(SIGINT, signal_func); //Ctrl+C

    return 0;
}


void signal_func(int no)
{
    switch (no)
    {
    case 1:
        printf("Receive signal SIGHUP.\n");
        break;
    case SIGINT:
        close(g_listensock);
        //printf("Receive Ctrl+C or signal SIGINT, server is stoping....\n");
        g_bIsExit=1;
        break;
    case SIGTERM:
        close(g_listensock);
        printf("Receive kill signal,server is stoping...\n");
        g_bIsExit=1;
        break;
    case SIGQUIT:
        printf("Receive SIGQUIT signal.\n");
        break;

    case SIGABRT:
        close(g_listensock);
        printf("Receive SIGABRT signal.\n");
        break;

    case SIGILL:
        printf("Receive SIGILL signal.\n");
        break;

    case SIGSEGV:
        close(g_listensock);
        printf("Receive SIGSEGV signal.\n");
        g_bIsExit=1;
        break;

    case SIGPIPE:
        printf("Receive SIGPIPE signal.\n");
        break;

    default:
        printf("Receive %d sigial!\n",no);
        break;
    break;
    }
}

关于c++ - 无法通过 infiniband 连接到服务器，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17656751/