使用 Winsock 获取套接字列表 [关闭]

Question

如何检索进程中所有套接字文件描述符的列表？ 是否可以在 Python 中执行此操作，或者我必须在 C 中使用 Winsock 执行此操作？

Answer 1

我不懂 Python，但我认为下面的代码很容易移植。

我在VxWorks上经常使用下面的方法，很快在Windows上试了试，是否有效。这个想法是简单地迭代套接字（=整数）并检查它们是否有效：

int iterator;
int len;
int option;

for (iterator = 1; iterator < 1024; iterator++)
{
    len = sizeof(option);
    if (getsockopt((SOCKET)iterator, SOL_SOCKET, SO_TYPE, &option, &len) == 0)   // valid socket?
    {
        /* valid socket found! */
    }
}

我已经在 Windows 7 上使用以下创建一些套接字的测试应用程序运行它：

int main ()
{
    WSADATA wsaData;
    SOCKET s;
    int iterator;
    int option;
    int len;
    struct sockaddr_in sockaddr;



    WSAStartup(MAKEWORD(2, 0), &wsaData);


    /*
    **  create some sockets...
    */
    s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    printf("s=%d\n", s);

    s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    printf("s=%d\n", s);
    sockaddr.sin_family = AF_INET;
    sockaddr.sin_addr.s_addr = inet_addr("192.168.178.1");
    sockaddr.sin_port = htons(80);
    connect(s, (SOCKADDR *)&sockaddr, sizeof(sockaddr));

    s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    printf("s=%d\n", s);
    sockaddr.sin_family = AF_INET;
    sockaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    sockaddr.sin_port = htons(27015);
    bind(s, (SOCKADDR *)&sockaddr, sizeof(sockaddr));
    listen(s, 10);



    printf("\niterating sockets...\n");
    for (iterator = 1; iterator < 1024; iterator++)
    {
        len = sizeof(option);
        if (getsockopt((SOCKET)iterator, SOL_SOCKET, SO_TYPE, &option, &len) == 0)   // valid socket?
        {
            printf("socket=%d (type=%d)\n", iterator, option);

            len = sizeof(option);
            if (getsockopt((SOCKET)iterator, SOL_SOCKET, SO_ACCEPTCONN, &option, &len) == 0)
            {
                if (option == 0)
                {
                    len = sizeof(sockaddr);
                    if (getpeername((SOCKET)iterator, (SOCKADDR *)&sockaddr, &len) == 0)
                    {
                        printf("   connected to %d.%d.%d.%d:%d\n",
                               sockaddr.sin_addr.S_un.S_un_b.s_b1,
                               sockaddr.sin_addr.S_un.S_un_b.s_b2,
                               sockaddr.sin_addr.S_un.S_un_b.s_b3,
                               sockaddr.sin_addr.S_un.S_un_b.s_b4,
                               sockaddr.sin_port);
                    }
                    else
                    {
                        printf("   ???\n");
                    }
                }
                else
                {
                    len = sizeof(sockaddr);
                    if (getsockname((SOCKET)iterator, (SOCKADDR *)&sockaddr, &len) == 0)
                    {
                        printf("   accepting connections on port=%d\n", sockaddr.sin_port);
                    }
                    else
                    {
                        printf("   accepting connections on port=???\n");
                    }
                }
            }
        }
    }

    return 0;
}

我得到以下打印输出：

s=124
s=132
s=136

iterating sockets...
socket=124 (type=1)
   ???
socket=125 (type=1)
   ???
socket=126 (type=1)
   ???
socket=132 (type=1)
   connected to 192.168.178.1:20480
socket=133 (type=1)
   connected to 192.168.178.1:20480
socket=134 (type=1)
   connected to 192.168.178.1:20480
socket=136 (type=1)
   accepting connections on port=34665
socket=137 (type=1)
   accepting connections on port=34665
socket=138 (type=1)
   accepting connections on port=34665

有趣的是，Windows 似乎为socket(..) 返回的每个套接字创建了两个额外的套接字。我简单地搜索了互联网以查找有关此的一些信息，但没有找到任何信息...