ff_connect cannot connect to remote address.

[Water-Melon]

In the same server, using another NIC to ping remote IP is ok, but bound by f-stack(dpdk) can not connect on it.
code:
...
in_addr.sin_family = AF_INET;
in_addr.sin_port = htons(remote_port);
in_addr.sin_addr.s_addr = htonl(inet_addr(remote_ip));
ff_connect(connfd, (struct linux_sockaddr *)&in_addr, sizeof(in_addr));
...
if is blocking mode, it will return < 0 and error message is: Operation not permitted

[jfb8856606]

F-Stack don't support blocking mode, you should use ff_connect like this.

    ff_init(argc, argv);

    int  clientfd = ff_socket(AF_INET, SOCK_STREAM, 0);
    printf("client:%d\n", clientfd);
    if (clientfd>0)
    {
        int on=1;
        ff_ioctl(clientfd, FIONBIO, &on);

        struct sockaddr_in server_sock;
        bzero(&server_sock,sizeof(server_sock));
        server_sock.sin_family = AF_INET;
        server_sock.sin_port = htons(80);
        inet_pton(AF_INET,"your ip",&(server_sock.sin_addr));

        int ret = ff_connect(clientfd,(struct linux_sockaddr *)&server_sock,sizeof(struct sockaddr_in));
        if (ret < 0 && errno != EINPROGRESS)
           printf("conn failed, clientfd = %d,ret=%d,%d,%s\n",clientfd,ret,errno,strerror(errno));
        else 
            printf("conn suc\n");
        printf("create_socket_cn clientfd = %d,ret=%d,%d,%s\n",clientfd,ret,errno,strerror(errno));
    }
    //EV_SET(&kevSet, clientfd, EVFILT_READ|EVFILT_WRITE, EV_ADD, 0, MAX_EVENTS, NULL);
    EV_SET(&kevSet, clientfd, EVFILT_WRITE, EV_ADD, 0, MAX_EVENTS, NULL);

    assert((kq = ff_kqueue()) > 0);

    /* Update kqueue */
    ff_kevent(kq, &kevSet, 1, NULL, 0, NULL);

    ff_run(loop, NULL);