怎么获取计算机的本地地址吗,获取本地计算机的IP地址

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所有基于gethostbyname的方法的问题在于，您不会获得分配给特定计算机的所有IP地址。服务器通常具有多个适配器。这是一个如何遍历主机上所有Ipv4和Ipv6地址的示例：void ListIpAddresses(IpAddresses& ipAddrs){  IP_ADAPTER_ADDRESSES* adapter_addresses(NULL);  IP_ADAPTER_ADDRESSES* adapter(NULL);  // Start with a 16 KB buffer and resize if needed -  // multiple attempts in case interfaces change while  // we are in the middle of querying them.  DWORD adapter_addresses_buffer_size = 16 * KB;  for (int attempts = 0; attempts != 3; ++attempts)  {    adapter_addresses = (IP_ADAPTER_ADDRESSES*)malloc(adapter_addresses_buffer_size);    assert(adapter_addresses);    DWORD error = ::GetAdaptersAddresses(      AF_UNSPEC,       GAA_FLAG_SKIP_ANYCAST |         GAA_FLAG_SKIP_MULTICAST |         GAA_FLAG_SKIP_DNS_SERVER |        GAA_FLAG_SKIP_FRIENDLY_NAME,       NULL,       adapter_addresses,      &adapter_addresses_buffer_size);    if (ERROR_SUCCESS == error)    {      // We're done here, people!      break;    }    else if (ERROR_BUFFER_OVERFLOW == error)    {      // Try again with the new size      free(adapter_addresses);      adapter_addresses = NULL;      continue;    }    else    {      // Unexpected error code - log and throw      free(adapter_addresses);      adapter_addresses = NULL;      // @todo      LOG_AND_THROW_HERE();    }  }  // Iterate through all of the adapters  for (adapter = adapter_addresses; NULL != adapter; adapter = adapter->Next)  {    // Skip loopback adapters    if (IF_TYPE_SOFTWARE_LOOPBACK == adapter->IfType)    {      continue;    }    // Parse all IPv4 and IPv6 addresses    for (      IP_ADAPTER_UNICAST_ADDRESS* address = adapter->FirstUnicastAddress;       NULL != address;      address = address->Next)    {      auto family = address->Address.lpSockaddr->sa_family;      if (AF_INET == family)      {        // IPv4        SOCKADDR_IN* ipv4 = reinterpret_cast(address->Address.lpSockaddr);        char str_buffer[INET_ADDRSTRLEN] = {0};        inet_ntop(AF_INET, &(ipv4->sin_addr), str_buffer, INET_ADDRSTRLEN);        ipAddrs.mIpv4.push_back(str_buffer);      }      else if (AF_INET6 == family)      {        // IPv6        SOCKADDR_IN6* ipv6 = reinterpret_cast(address->Address.lpSockaddr);        char str_buffer[INET6_ADDRSTRLEN] = {0};        inet_ntop(AF_INET6, &(ipv6->sin6_addr), str_buffer, INET6_ADDRSTRLEN);        std::string ipv6_str(str_buffer);        // Detect and skip non-external addresses        bool is_link_local(false);        bool is_special_use(false);        if (0 == ipv6_str.find("fe"))        {          char c = ipv6_str[2];          if (c == '8' || c == '9' || c == 'a' || c == 'b')          {            is_link_local = true;          }        }        else if (0 == ipv6_str.find("2001:0:"))        {          is_special_use = true;        }        if (! (is_link_local || is_special_use))        {          ipAddrs.mIpv6.push_back(ipv6_str);        }      }      else      {        // Skip all other types of addresses        continue;      }    }  }  // Cleanup  free(adapter_addresses);  adapter_addresses = NULL;  // Cheers!}