【求助】怎么编程实现ipv4与ipv6的快速切换_c++吧_百度贴吧
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【求助】怎么编程实现ipv4与ipv6的快速切换收藏
就是怎么改协议版本？
不懂啊 只知道建立socket的时候可以在第一个参数里指定协议socket(PF_INET,SOCK_STREAM,0);这样就是V4socket(PF_INET4,SOCK_STREAM,0);这样就是V6
这个可以通过修改注册表么？如果可以，具体是注册表里的哪儿键？求指导
来人挽尊啊
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为兴趣而生，贴吧更懂你。或c++ - ipv4 and ipv6 from any valid address - Stack Overflow
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I'm trying to get both the ipv4 and ipv6 address from any string address, be it by ipv4, ipv6, or DNS address.
I can create my own function to do so, but I'm trying to take
and utilize built-in capabilities.
Is there a way to input an address string of any format, and have both
boost addresses returned?
user1382306
Getting an address from the DNS name involves... querying a naming server (DNS!). If you want to enumerate the results, use a resolver in asio:
Simple example:
#include &boost/asio.hpp&
#include &boost/function_output_iterator.hpp&
#include &set&
using boost::asio::ip::
std::set&address& unique_endpoints(std::string const& ip)
using resolver = boost::asio::ip::tcp::
boost::asio::io_ // TODO use existing service / resolver
resolver r(ios);
std::set&address&
for (auto it = r.resolve({ip, ""}); it != resolver::iterator {}; ++it)
//std::cout && "Resolved: " && it-&host_name() && " -& " && it-&endpoint() && " " && it-&service_name() && "\n";
address a = it-&endpoint().address();
if (a.is_v4())
unique.insert(boost::asio::ip::address_v6::v4_mapped(a.to_v4()));
unique.insert(a);
template &typename S&
bool endpoints_overlap(S const& a, S const& b)
bool matching_found =
std::set_intersection(
a.begin(), a.end(), b.begin(), b.end(),
boost::make_function_output_iterator([&](address const&) { matching_found = }));
return matching_
int main()
auto h = unique_endpoints("bbs2.fritz.box");
auto a = unique_endpoints("192.168.2.111");
auto b = unique_endpoints("::ffff:192.168.2.111");
auto c = unique_endpoints("::ffff:c0a8:026f");
assert(endpoints_overlap(a, b));
assert(endpoints_overlap(a, c));
assert(endpoints_overlap(b, c));
assert(endpoints_overlap(h, a));
assert(endpoints_overlap(h, b));
assert(endpoints_overlap(h, c));
Note that this test will decide that endpoints overlap when one of the DNS responses matches. This might not always be true in a cluster setting (? no expert there) and you might also want to detect broadcast addresses before using this algorithm (not tested).
Note also, I don't think there's a way to detect equivalence of actual hosts (meaning, if a host has several physical/logical NICs, they will appear as separate servers on the transport level).
Finally, in a real-world application you will want to do the resolving asynchronously (use async_resolve)
213k26262357
boost::ip::address provides this type of functionality.
You can construct an address from a string of either format(decimal for ipv4 or hexadecimal for ipv6) using the from_string function:
boost::ip::address address( boost::ip::address::from_string( myIpAddress ) );
Then you should be able to return either the v4 or v6 ip address:
boost::asio::ip::address_v4 ipv4 = address.to_v4();
boost::asio::ip::address_v6 ipv6 = address.to_v6();
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怎样编写ip无关的应用程序呢？书上只讲了用getaddrinfo(),gethostinfo()，小弟初学，求高人给详个较为清楚详细的办法吧，谢谢各位了！
[ 本帖最后由 Jass 于
15:38 编辑 ]
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求助：编写Ipv4、Ipv6兼容的网络程序方法
版上大牛肯定有做过Ipv4和IPv6兼容的网络程序的吧。
小弟初学，牛看了一两本书，不甚了了，求牛人指点迷津啊
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能不能劳驾说得详细一些呢，呵呵。
不好意思初学者，而且对ACE只是听说却不了解。
另外最好能用C语言实现一个简单的思路
谢谢啦！！
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回复 4楼 Jass 的帖子
&UNIX Network Programming&这本书上讲得有. 好书啊好书
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嗯 我读了他的第十二章 IPv4与IPv6的互操作性
但是呢 呵呵 恕我能力不高 只是有了一个使用getaddrinfo和getnameinfo的印象
并不清楚要怎么编写出ip无关的程序来
楼上的大哥能不能指点一下，提示一个框架出来
比方说要作哪些哪些工作，编写哪些哪些函数，就可以了
呵呵 谢谢！！
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那么请问何为 “IP 无关”，或者 “IP independent”？
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回复 7楼 langue 的帖子
就是写好的程序，拿到ipv4的机器和ipv6的机器上都不影响C++在windows下获取本地主机ipv4地址和ipv6地址
0人收藏此代码,
C++在windows下获取本地主机ipv4地址和ipv6地址
#include &Winsock2.h&
#include &stdio.h&
#include &iostream&
#include &cstring&
#include&ws2tcpip.h&
#pragma comment(lib, &ws2_32.lib &)
//linking to the library
int get_ip()
struct addrinfo *ailist, *
struct sockaddr_in6 *sinp6;
char hostname[255] = {0};
char *port = &3294&;
const char *
gethostname(hostname, sizeof(hostname));
if((hostinfo = gethostbyname(hostname)) == NULL)
//获得本地ipv4地址
errno = GetLastError();
fprintf(stderr,&gethostbyname Error:%d\n&, errno);
while(*(hostinfo-&h_addr_list) != NULL)
//输出ipv4地址
ip = inet_ntoa(*(struct in_addr *) *hostinfo-&h_addr_list);
printf(&ipv4 addr = %s\n\n&, ip);
hostinfo-&h_addr_list++;
hint.ai_family = AF_INET6;
hint 的限定设置
hint.ai_socktype = SOCK_STREAM;
这里可是设置 socket type
SOCK——DGRAM */
hint.ai_flags = AI_PASSIVE;
// flags 的标志很多
。常用的有AI_CANONNAME;
hint.ai_protocol = 0;
一般为0，默认 */
hint.ai_addrlen = 0;
下面不可以设置，为0，或者为NULL
hint.ai_canonname = NULL;
hint.ai_addr = NULL;
hint.ai_next = NULL;
ilRc = getaddrinfo(hostname, port, &hint, &ailist);
/*通过主机名获得地址信息*/
if (ilRc & 0)
char str_error[100];
strcpy(str_error, (char *)gai_strerror(errno));
printf(&str_error = %s&, str_error);
if(ailist == NULL)
printf(&sorry not find the IP address,please try again \n&);
for (aip = aip != NULL; aip = aip-&ai_next)
/* 显示获取的信息
aip-&ai_family == AF_INET6;
sinp6 = (struct sockaddr_in6 *)aip-&ai_
/* 为什么是for 循环 ，先向下看 */
printf(&ipv6 addr = &);
for(i = 0; i & 16; i++)
if(((i-1)%2) && (i&0))
printf(&:&);
printf(&%02x&,sinp6-&sin6_addr.u.Byte[i]);
printf(& \n&);
printf(& \n&);
int main(){
WORD wVersionR
WSADATA wsaD
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );//initiate the ws2_32.dll and match the version
if ( err != 0 )
if ( LOBYTE( wsaData.wVersion ) != 1 ||
//if the version is not matched ,then quit and terminate the ws3_32.dll
HIBYTE( wsaData.wVersion ) != 1 )
WSACleanup( );
//该代码片段来自于: /codes/cpp/5958
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