BSD 套接字问题：inet_ntop 返回“0.0.0.0”
我正在尝试获取我绑定的套接字正在侦听的机器的 IP。 打印的端口号工作正常，但地址是“0.0.0.0”。 这是相关代码。 在获取此代码之前，res 已传递给 getaddrinfo 和 getsockname。
char ip[INET_ADDRSTRLEN];
struct sockaddr_in *ipv4 = (struct sockaddr_in *)res->ai_addr;
void* addr = &(ipv4->sin_addr);
inet_ntop(res->ai_family, addr, ip, sizeof ip);
std::cout << "SERVER_ADDRESS " << ip << std::endl;
std::cout << "SERVER_PORT " << ipv4->sin_port << std::endl;
可能出什么问题了？
I'm trying to get the IP of the machine a socket I've bound is listening on. The port number printed works fine, but the address is "0.0.0.0". Here's the relevant code. res has been passed to getaddrinfo and getsockname before getting to this code.
char ip[INET_ADDRSTRLEN];
struct sockaddr_in *ipv4 = (struct sockaddr_in *)res->ai_addr;
void* addr = &(ipv4->sin_addr);
inet_ntop(res->ai_family, addr, ip, sizeof ip);
std::cout << "SERVER_ADDRESS " << ip << std::endl;
std::cout << "SERVER_PORT " << ipv4->sin_port << std::endl;
What could be wrong?
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地址
0.0.0.0表示套接字正在侦听所有地址。 像127.0.0.1这样的特定地址意味着服务器仅侦听该地址，而不侦听任何其他地址。An address of
0.0.0.0means that the socket is listening on all addresses. A specific address like127.0.0.1would mean that the server is just listening on that address, but not on any other ones.