如果运行此示例，您将看到该端口从未列出netstat。为什么？我该如何做到这一点？
#include <WinSock.h>
#include <io.h>
#include <stdio.h>
#pragma comment(lib, "WS2_32")
int main() {
WORD wVers = MAKEWORD(2, 2);
WSADATA wsa;
WSAStartup(wVers, &wsa);
SOCKET sock = socket(AF_INET, SOCK_STREAM, 6);
if (sock != INVALID_SOCKET) {
struct sockaddr_in addr = { 0 };
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
int addrlen = sizeof(addr);
bind(sock, (struct sockaddr *)&addr, addrlen);
if (getsockname(sock, (struct sockaddr *)&addr, &addrlen) == 0) {
fprintf(stdout, "HANDLE = %d, port = %d\n", sock, addr.sin_port);
fflush(stdout);
system("netstat -a -n");
}
closesocket(sock);
}
WSACleanup();
}
netstat -a只列出已连接的套接字和侦听套接字。
-a Displays all connections and listening ports.
Neither connect nor listen在你的套接字上被调用，所以它不在netstat -a.
但是，从 Windows 10 开始，您可以使用netstat -q.
-q Displays all connections, listening ports, and bound
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