{"id":38630,"date":"2025-05-21T05:36:02","date_gmt":"2025-05-20T21:36:02","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/38630.html"},"modified":"2025-05-21T05:36:02","modified_gmt":"2025-05-20T21:36:02","slug":"%e3%80%90%e5%88%9b%e5%bb%baudp%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%92%8c%e5%ae%a2%e6%88%b7%e7%ab%af%e3%80%91","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/38630.html","title":{"rendered":"\u3010\u521b\u5efaUDP\u670d\u52a1\u5668\u548c\u5ba2\u6237\u7aef\u3011"},"content":{"rendered":"

1.\u521b\u5efa（\u670d\u52a1\u7aef）<\/h2>\n

UDP\u662f\u4ec0\u4e48？ \u5728Linux\u4e2d，UDP(User Datagram Protocol，\u7528\u6237\u6570\u636e\u62a5\u534f\u8bae)\u662f\u4e00\u79cd\u65e0\u8fde\u63a5\u7684\u3001\u4e0d\u53ef\u9760\u7684\u7f51\u7edc\u4f20\u8f93\u534f\u8bae，\u5c5e\u4e8eTCP\/IP\u534f\u8bae\u65cf\u7684\u4f20\u8f93\u5c42\u3002\u4e0eTCP\u4e0d\u540c，UDP\u4e0d\u4fdd\u8bc1\u6570\u636e\u5305\u7684\u987a\u5e8f\u3001\u5b8c\u6574\u6027\u6216\u53ef\u9760\u6027，\u4f46\u5b83\u5177\u6709\u4f4e\u5ef6\u8fdf\u3001\u4f4e\u5f00\u9500\u7684\u7279\u70b9，\u9002\u7528\u4e8e\u5bf9\u5b9e\u65f6\u6027\u8981\u6c42\u9ad8\u4f46\u5141\u8bb8\u5c11\u91cf\u6570\u636e\u4e22\u5931\u7684\u573a\u666f\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

1.1 \u5957\u63a5\u5b57 socket<\/h3>\n

#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span>
\nint<\/span> socket<\/span>(<\/span>int<\/span> domain,<\/span> int<\/span> type,<\/span> int<\/span> protocol)<\/span>;<\/span><\/p>\n\n\u53c2\u6570\u4f5c\u7528\u53d6\u503c<\/tr>\n\n\n\n\n
domain<\/td>\n\u6307\u5b9a\u5957\u63a5\u5b57\u4f7f\u7528\u7684\u534f\u8bae\u65cf，\u51b3\u5b9a\u4e86\u901a\u4fe1\u7684\u5730\u5740\u683c\u5f0f\u548c\u534f\u8bae\u7c7b\u578b\u3002<\/td>\nAF_INET（IPv4 \u534f\u8bae\u65cf \u6700\u5e38\u7528） AF_INET6 （IPv6 \u534f\u8bae\u65cf）<\/td>\n<\/tr>\n
type<\/td>\n\u6307\u5b9a\u5957\u63a5\u5b57\u7684\u6570\u636e\u4f20\u8f93\u65b9\u5f0f，\u51b3\u5b9a\u901a\u4fe1\u7684\u53ef\u9760\u6027\u548c\u7279\u6027\u3002<\/td>\nAF_INET IPv4 \u534f\u8bae\u65cf（\u6700\u5e38\u7528）\u3002AF_INET6 IPv6 \u534f\u8bae\u65cf\u3002AF_UNIX Unix \u57df\u5957\u63a5\u5b57（\u672c\u5730\u8fdb\u7a0b\u95f4\u901a\u4fe1）\u3002<\/td>\n<\/tr>\n
protocol<\/td>\n\u6307\u5b9a\u5957\u63a5\u5b57\u4f7f\u7528\u7684\u5177\u4f53\u534f\u8bae，<\/td>\n\u901a\u5e38\u8bbe\u4e3a 0 \u8868\u793a\u81ea\u52a8\u9009\u62e9\u4e0e domain \u548c type \u5339\u914d\u7684\u9ed8\u8ba4\u534f\u8bae\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

#<\/span>include<\/span> <sys\/socket.h><\/span><\/span><\/p>\n

\/\/ \u521b\u5efa UDP Socket<\/span>
\nint<\/span> sockfd =<\/span> socket<\/span>(<\/span>AF_INET,<\/span> SOCK_DGRAM,<\/span> 0<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>sockfd <<\/span> 0<\/span>)<\/span> {<\/span>
\n perror<\/span>(<\/span>"socket creation failed"<\/span>)<\/span>;<\/span>
\n exit<\/span>(<\/span>EXIT_FAILURE)<\/span>;<\/span>
\n}<\/span><\/p>\n

1.2 \u7ed1\u5b9a\u5730\u5740 bind<\/h3>\n

\/\/\u7ed1\u5b9a\u524d\u5148\u586b\u5145\u5730\u5740\u7ed3\u6784\u4f53<\/span>
\nstruct<\/span> sockaddr_in<\/span> local;<\/span>
\n memset<\/span>(<\/span>&<\/span>local,<\/span> 0<\/span>,<\/span> sizeof<\/span>(<\/span>local)<\/span>)<\/span>;<\/span>
\n local.<\/span>sin_family =<\/span> AF_INET;<\/span>
\n local.<\/span>sin_port =<\/span> ::<\/span>htons<\/span>(<\/span>8080<\/span>)<\/span>;<\/span> \/\/ \u8981\u88ab\u53d1\u9001\u7ed9\u5bf9\u65b9\u7684，\u5373\u8981\u53d1\u5230\u7f51\u7edc\u4e2d！<\/span>
\n local.<\/span>sin_addr.<\/span>s_addr =<\/span> inet_addr<\/span>(<\/span>"127.0.0.1"<\/span>)<\/span>;<\/span> \/\/ IP\u5730\u5740\u8f6c\u6362<\/span>
\n\/\/\u6216\u8005\u4e5f\u53ef\u4ee5 local.sin_addr.s_addr = INADDR_ANY;<\/span>
\n\/\/INADDR_ANY:\u8868\u793a"\u4efb\u610f\u53ef\u7528\u7684\u7f51\u7edc\u63a5\u53e3"\u6216"\u6240\u6709\u672c\u5730IP\u5730\u5740"\u3002<\/span><\/p>\n

\u5730\u5740\u7ed3\u6784\u8be6\u60c5：sockaddr_in\u548csockaddr<\/p>\n

#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span><\/p>\n

int<\/span> bind<\/span>(<\/span>int<\/span> sockfd,<\/span> const<\/span> struct<\/span> sockaddr<\/span> *<\/span>addr,<\/span> socklen_t addrlen)<\/span>;<\/span><\/p>\n\n\u53c2\u6570\u4f5c\u7528<\/tr>\n\n\n\n\n
sockfd<\/td>\n\u8981\u7ed1\u5b9a\u7684\u5957\u63a5\u5b57\u6587\u4ef6\u63cf\u8ff0\u7b26（\u7531 socket() \u521b\u5efa）\u3002<\/td>\n<\/tr>\n
addr<\/td>\n\u6307\u5411 sockaddr \u7ed3\u6784\u4f53\u7684\u6307\u9488，\u5305\u542b\u8981\u7ed1\u5b9a\u7684\u5730\u5740\u548c\u7aef\u53e3\u4fe1\u606f\u3002<\/td>\n<\/tr>\n
addrlen sockaddr<\/td>\n\u7ed3\u6784\u4f53\u7684\u957f\u5ea6（\u901a\u5e38\u7528 sizeof(struct sockaddr_in)）\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

1.3 \u63a5\u6536\u6570\u636e recvfrom<\/h3>\n

#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span><\/p>\n

ssize_t recvfrom<\/span>(<\/span>int<\/span> sockfd,<\/span> void<\/span> *<\/span>buf,<\/span> size_t len,<\/span> int<\/span> flags,<\/span>
\n struct<\/span> sockaddr<\/span> *<\/span>src_addr,<\/span> socklen_t *<\/span>addrlen)<\/span>;<\/span><\/p>\n\n<\/tr>\n\n\n\n\n\n\n\n
sockfd<\/td>\n\u5df2\u521b\u5efa\u7684 UDP \u5957\u63a5\u5b57\u6587\u4ef6\u63cf\u8ff0\u7b26<\/td>\n<\/tr>\n
buf<\/td>\n\u63a5\u6536\u6570\u636e\u7684\u7f13\u51b2\u533a\u6307\u9488<\/td>\n<\/tr>\n
len<\/td>\n\u7f13\u51b2\u533a\u7684\u6700\u5927\u957f\u5ea6<\/td>\n<\/tr>\n
flags<\/td>\n\u63a7\u5236\u63a5\u6536\u884c\u4e3a\u7684\u6807\u5fd7\u4f4d（\u901a\u5e38\u8bbe\u4e3a0） src_addr \u7528\u4e8e\u5b58\u50a8\u53d1\u9001\u65b9\u5730\u5740\u4fe1\u606f\u7684\u7ed3\u6784\u4f53\u6307\u9488<\/td>\n<\/tr>\n
src_addr<\/td>\n\u7528\u4e8e\u5b58\u50a8\u53d1\u9001\u65b9\u5730\u5740\u4fe1\u606f\u7684\u7ed3\u6784\u4f53\u6307\u9488<\/td>\n<\/tr>\n
addrlen<\/td>\n\u8f93\u5165\u65f6\u4e3a\u7ed3\u6784\u4f53\u5927\u5c0f，\u8f93\u51fa\u65f6\u4e3a\u5b9e\u9645\u5730\u5740\u957f\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\/\/\u5b9e\u4f8b<\/span>
\nchar<\/span> inbuffer[<\/span>1024<\/span>]<\/span>;<\/span> \/\/ string<\/span>
\nstruct<\/span> sockaddr_in<\/span> peer;<\/span>
\nsocklen_t len =<\/span> sizeof<\/span>(<\/span>peer)<\/span>;<\/span> \/\/ \u5fc5\u987b\u8bbe\u5b9a<\/span>
\nssize_t n =<\/span> ::<\/span>recvfrom<\/span>(<\/span>sockfd,<\/span> inbuffer,<\/span> sizeof<\/span>(<\/span>inbuffer)<\/span> –<\/span> 1<\/span>,<\/span> 0<\/span>,<\/span> (<\/span>struct<\/span> sockaddr<\/span>*<\/span>)<\/span>&<\/span>peer,<\/span> &<\/span>len)<\/span>;<\/span>
\n\/\/sockaddr_in \u662f IPv4 \u4e13\u7528\u7ed3\u6784\u4f53，\u4f7f\u7528\u65f6\u9700\u5f3a\u5236\u8f6c\u6362\u4e3a sockaddr*\u3002<\/span><\/p>\n

1.4 \u53d1\u9001\u54cd\u5e94 sendto<\/h3>\n

#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span><\/p>\n

ssize_t sendto<\/span>(<\/span>int<\/span> sockfd,<\/span> const<\/span> void<\/span> *<\/span>buf,<\/span> size_t len,<\/span> int<\/span> flags,<\/span>
\n const<\/span> struct<\/span> sockaddr<\/span> *<\/span>dest_addr,<\/span> socklen_t addrlen)<\/span>;<\/span><\/p>\n\n<\/tr>\n\n\n\n\n\n\n\n
sockfd<\/td>\n\u5df2\u521b\u5efa\u7684 UDP \u5957\u63a5\u5b57\u6587\u4ef6\u63cf\u8ff0\u7b26<\/td>\n<\/tr>\n
buf<\/td>\n\u8981\u53d1\u9001\u7684\u6570\u636e\u7f13\u51b2\u533a\u6307\u9488<\/td>\n<\/tr>\n
len<\/td>\n\u8981\u53d1\u9001\u7684\u6570\u636e\u957f\u5ea6<\/td>\n<\/tr>\n
flags<\/td>\n\u63a7\u5236\u53d1\u9001\u884c\u4e3a\u7684\u6807\u5fd7\u4f4d（\u901a\u5e38\u8bbe\u4e3a0）<\/td>\n<\/tr>\n
dest_addr<\/td>\n\u76ee\u6807\u5730\u5740\u7684\u7ed3\u6784\u4f53\u6307\u9488<\/td>\n<\/tr>\n
addrlen<\/td>\n\u76ee\u6807\u5730\u5740\u7ed3\u6784\u4f53\u7684\u957f\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

std::<\/span>string echo_string =<\/span> "echo# "<\/span>;<\/span>
\necho_string +=<\/span> inbuffer;<\/span>
\n::<\/span>sendto<\/span>(<\/span>sockfd,<\/span> echo_string.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span> echo_string.<\/span>size<\/span>(<\/span>)<\/span>,<\/span> 0<\/span>,<\/span> (<\/span>struct<\/span> sockaddr<\/span>*<\/span>)<\/span>&<\/span>peer,<\/span> sizeof<\/span>(<\/span>peer)<\/span>)<\/span>;<\/span><\/p>\n

\u5b8c\u6574\u4ee3\u7801<\/p>\n

#<\/span>ifndef<\/span> __UDP_SERVER_HPP__<\/span><\/span>
\n#<\/span>define<\/span> __UDP_SERVER_HPP__<\/span><\/span><\/p>\n

#<\/span>include<\/span> <iostream><\/span><\/span>
\n#<\/span>include<\/span> <string><\/span><\/span>
\n#<\/span>include<\/span> <memory><\/span><\/span>
\n#<\/span>include<\/span> <cstring><\/span><\/span>
\n#<\/span>include<\/span> <cerrno><\/span><\/span>
\n#<\/span>include<\/span> <strings.h><\/span><\/span><\/p>\n

#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span>
\n#<\/span>include<\/span> <netinet\/in.h><\/span><\/span>
\n#<\/span>include<\/span> <arpa\/inet.h><\/span><\/span><\/p>\n

const<\/span> static<\/span> int<\/span> gsockfd =<\/span> –<\/span>1<\/span>;<\/span>
\nconst<\/span> static<\/span> std::<\/span>string gdefaultip =<\/span> "127.0.0.1"<\/span>;<\/span> \/\/ \u8868\u793a\u672c\u5730\u4e3b\u673a<\/span>
\nconst<\/span> static<\/span> uint16_t<\/span> gdefaultport =<\/span> 8080<\/span>;<\/span><\/p>\n

#<\/span>define<\/span> Die<\/span>(<\/span>code)<\/span> <\/span>\\\\<\/span>
\n do<\/span> <\/span>\\\\<\/span>
\n {<\/span> <\/span>\\\\<\/span>
\n exit<\/span>(<\/span>code)<\/span>;<\/span> <\/span>\\\\<\/span>
\n }<\/span> while<\/span> (<\/span>0<\/span>)<\/span><\/span><\/span><\/p>\n

#<\/span>define<\/span> CONV<\/span>(<\/span>v)<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>(<\/span>v)<\/span><\/span><\/span>
\n\/\/\u5b8f\u8f6c<\/span><\/p>\n

enum<\/span>
\n{<\/span>
\n USAGE_ERR =<\/span> 1<\/span>,<\/span>
\n SOCKET_ERR,<\/span>
\n BIND_ERR
\n}<\/span>;<\/span><\/p>\n

class<\/span> UdpServer<\/span>
\n{<\/span>
\npublic<\/span>:<\/span>
\n UdpServer<\/span>(<\/span>uint16_t<\/span> port =<\/span> gdefaultport)<\/span>
\n :<\/span> _sockfd<\/span>(<\/span>gsockfd)<\/span>,<\/span>
\n _port<\/span>(<\/span>gdefaultport)<\/span>,<\/span>
\n _isrunning<\/span>(<\/span>false<\/span>)<\/span>
\n {<\/span>
\n }<\/span>
\n \/\/ \u90fd\u662f\u5957\u8def<\/span>
\n void<\/span> InitServer<\/span>(<\/span>)<\/span>
\n {<\/span>
\n \/\/ 1. \u521b\u5efasocket<\/span>
\n _sockfd =<\/span> ::<\/span>socket<\/span>(<\/span>AF_INET,<\/span> SOCK_DGRAM,<\/span> 0<\/span>)<\/span>;<\/span> \/\/ IP?PORT?\u7f51\u7edc？\u672c\u5730？<\/span>
\n if<\/span> (<\/span>_sockfd <<\/span> 0<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cout <<<\/span> "socket: "<\/span> <<<\/span> strerror<\/span>(<\/span>errno)<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n Die<\/span>(<\/span>SOCKET_ERR)<\/span>;<\/span>
\n }<\/span>
\n std::<\/span>cout <<<\/span> "socket success, sockfd is : "<\/span> <<<\/span> _sockfd <<<\/span> std::<\/span>endl;<\/span><\/p>\n

\/\/ 2. \u586b\u5145\u7f51\u7edc\u4fe1\u606f，\u5e76bind\u7ed1\u5b9a<\/span>
\n \/\/ 2.1 \u6709\u6ca1\u6709\u628asocket\u4fe1\u606f，\u8bbe\u7f6e\u8fdb\u5165\u5185\u6838\u4e2d？？\u6ca1\u6709，\u53ea\u662f\u586b\u5145\u4e86\u7ed3\u6784\u4f53！<\/span>
\n struct<\/span> sockaddr_in<\/span> local;<\/span>
\n bzero<\/span>(<\/span>&<\/span>local,<\/span> sizeof<\/span>(<\/span>local)<\/span>)<\/span>;<\/span>
\n local.<\/span>sin_family =<\/span> AF_INET;<\/span>
\n local.<\/span>sin_port =<\/span> ::<\/span>htons<\/span>(<\/span>_port)<\/span>;<\/span> \/\/ \u8981\u88ab\u53d1\u9001\u7ed9\u5bf9\u65b9\u7684，\u5373\u8981\u53d1\u5230\u7f51\u7edc\u4e2d！<\/span>
\n \/\/local.sin_addr.s_addr = ::inet_addr(_ip.c_str()); \/\/ 1. string ip->4bytes 2. network order \/\/TODO<\/span>
\n local.<\/span>sin_addr.<\/span>s_addr =<\/span> INADDR_ANY;<\/span>
\n \/\/INADDR_ANY:\u8868\u793a"\u4efb\u610f\u53ef\u7528\u7684\u7f51\u7edc\u63a5\u53e3"\u6216"\u6240\u6709\u672c\u5730IP\u5730\u5740"\u3002<\/span><\/p>\n

\/\/ 2.2 bind ： \u8bbe\u7f6e\u8fdb\u5165\u5185\u6838\u4e2d<\/span>
\n int<\/span> n =<\/span> ::<\/span>bind<\/span>(<\/span>_sockfd,<\/span> CONV<\/span>(<\/span>&<\/span>local)<\/span>,<\/span> sizeof<\/span>(<\/span>local)<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>n <<\/span> 0<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cout <<<\/span> "bind: "<\/span> <<<\/span> strerror<\/span>(<\/span>errno)<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n Die<\/span>(<\/span>BIND_ERR)<\/span>;<\/span>
\n }<\/span>
\n std::<\/span>cout <<<\/span> "bind success"<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n }<\/span>
\n void<\/span> Start<\/span>(<\/span>)<\/span>
\n {<\/span>
\n _isrunning =<\/span> true<\/span>;<\/span>
\n while<\/span> (<\/span>true<\/span>)<\/span>
\n {<\/span>
\n char<\/span> inbuffer[<\/span>1024<\/span>]<\/span>;<\/span> \/\/ string<\/span>
\n struct<\/span> sockaddr_in<\/span> peer;<\/span>
\n socklen_t len =<\/span> sizeof<\/span>(<\/span>peer)<\/span>;<\/span> \/\/ \u5fc5\u987b\u8bbe\u5b9a<\/span><\/p>\n

ssize_t n =<\/span> ::<\/span>recvfrom<\/span>(<\/span>_sockfd,<\/span> inbuffer,<\/span> sizeof<\/span>(<\/span>inbuffer)<\/span> –<\/span> 1<\/span>,<\/span> 0<\/span>,<\/span> CONV<\/span>(<\/span>&<\/span>peer)<\/span>,<\/span> &<\/span>len)<\/span>;<\/span>
\n if<\/span> (<\/span>n ><\/span> 0<\/span>)<\/span>
\n {<\/span>
\n \/\/ 1. \u6d88\u606f\u5185\u5bb9 && 2. \u8c01\u53d1\u7ed9\u6211\u7684<\/span>
\n uint16_t<\/span> clientport =<\/span> ::<\/span>ntohs<\/span>(<\/span>peer.<\/span>sin_port)<\/span>;<\/span>
\n std::<\/span>string clientip =<\/span> ::<\/span>inet_ntoa<\/span>(<\/span>peer.<\/span>sin_addr)<\/span>;<\/span><\/p>\n

inbuffer[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span><\/p>\n

std::<\/span>string clientinfo =<\/span> gdefaultip +<\/span> ":"<\/span> +<\/span> std::<\/span>to_string<\/span>(<\/span>_port)<\/span> +<\/span> " # "<\/span> +<\/span> inbuffer;<\/span><\/p>\n

std::<\/span>cout <<<\/span> clientinfo <<<\/span>std::<\/span>endl;<\/span><\/p>\n

std::<\/span>string echo_string =<\/span> "echo# "<\/span>;<\/span>
\n echo_string +=<\/span> inbuffer;<\/span><\/p>\n

::<\/span>sendto<\/span>(<\/span>_sockfd,<\/span> echo_string.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span> echo_string.<\/span>size<\/span>(<\/span>)<\/span>,<\/span> 0<\/span>,<\/span> CONV<\/span>(<\/span>&<\/span>peer)<\/span>,<\/span> sizeof<\/span>(<\/span>peer)<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n _isrunning =<\/span> false<\/span>;<\/span>
\n }<\/span>
\n ~<\/span>UdpServer<\/span>(<\/span>)<\/span>
\n {<\/span>
\n \/\/ if(_sockfd > gsockfd)<\/span>
\n \/\/ ::close(_sockfd);<\/span>
\n }<\/span><\/p>\n

private<\/span>:<\/span>
\n int<\/span> _sockfd;<\/span>
\n uint16_t<\/span> _port;<\/span> \/\/ \u670d\u52a1\u5668\u672a\u6765\u7684\u7aef\u53e3\u53f7<\/span>
\n \/\/std::string _ip; \/\/ \u670d\u52a1\u5668\u6240\u5bf9\u5e94\u7684IP<\/span>
\n bool<\/span> _isrunning;<\/span> \/\/ \u670d\u52a1\u5668\u8fd0\u884c\u72b6\u6001<\/span>
\n}<\/span>;<\/span><\/p>\n

#<\/span>endif<\/span><\/span><\/p>\n

2.\u521b\u5efa\u5ba2\u6237\u7aef<\/h2>\n

2.1 \u521b\u5efa\u5957\u63a5\u5b57<\/h3>\n

int<\/span> sockfd =<\/span> ::<\/span>socket<\/span>(<\/span>AF_INET,<\/span> SOCK_DGRAM,<\/span> 0<\/span>)<\/span>;<\/span>
\nif<\/span>(<\/span>sockfd <<\/span> 0<\/span>)<\/span>
\n{<\/span>
\n std::<\/span>cerr <<<\/span> "socket error"<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n Die<\/span>(<\/span>SOCKET_ERR)<\/span>;<\/span>
\n}<\/span><\/p>\n

2.2 \u5730\u5740\u914d\u7f6e<\/h3>\n

struct<\/span> sockaddr_in<\/span> server;<\/span>
\nmemset<\/span>(<\/span>&<\/span>server,<\/span> 0<\/span>,<\/span> sizeof<\/span>(<\/span>server)<\/span>)<\/span>;<\/span>
\nserver.<\/span>sin_family =<\/span> AF_INET;<\/span>
\nserver.<\/span>sin_port =<\/span> ::<\/span>htons<\/span>(<\/span>_port)<\/span>;<\/span>
\nserver.<\/span>sin_addr.<\/span>s_addr =<\/span> ::<\/span>inet_addr<\/span>(<\/span>_ip)<\/span>;<\/span><\/p>\n

2.3 \u6570\u636e\u53d1\u9001<\/h3>\n

std::<\/span>cout <<<\/span> "Please Enter# "<\/span>;<\/span>
\nstd::<\/span>string message;<\/span>
\nstd::<\/span>getline<\/span>(<\/span>std::<\/span>cin,<\/span> message)<\/span>;<\/span>
\n\/\/ client \u4e0d\u9700\u8981bind\u5417？socket <-> socket<\/span>
\n\/\/ client\u5fc5\u987b\u4e5f\u8981\u6709\u81ea\u5df1\u7684ip\u548c\u7aef\u53e3！\u4f46\u662f\u5ba2\u6237\u7aef，\u4e0d\u9700\u8981\u81ea\u5df1\u663e\u793a\u7684\u8c03\u7528bind！！<\/span>
\n\/\/ \u800c\u662f，\u5ba2\u6237\u7aef\u9996\u6b21sendto\u6d88\u606f\u7684\u65f6\u5019，\u7531OS\u81ea\u52a8\u8fdb\u884cbind<\/span>
\n\/\/ 1. \u5982\u4f55\u7406\u89e3client\u81ea\u52a8\u968f\u673abind\u7aef\u53e3\u53f7？ \u4e00\u4e2a\u7aef\u53e3\u53f7，\u53ea\u80fd\u88ab\u4e00\u4e2a\u8fdb\u7a0bbind<\/span>
\n\/\/ 2. \u5982\u4f55\u7406\u89e3server\u8981\u663e\u793a\u7684bind？\u670d\u52a1\u5668\u7684\u7aef\u53e3\u53f7，\u5fc5\u987b\u7a33\u5b9a！！\u5fc5\u987b\u662f\u4f17\u6240\u5468\u77e5\u4e14\u4e0d\u80fd\u6539\u53d8\u8f7b\u6613\u6539\u53d8\u7684!<\/span>
\nint<\/span> n =<\/span> ::<\/span>sendto<\/span>(<\/span>sockfd,<\/span> message.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span>message.<\/span>size<\/span>(<\/span>)<\/span>,<\/span> 0<\/span>,<\/span> (<\/span>struct<\/span> sockaddr<\/span>*<\/span>)<\/span>&<\/span>server,<\/span> sizeof<\/span>(<\/span>server)<\/span>)<\/span>;<\/span><\/p>\n

2.4 \u63a5\u6536\u6570\u636e<\/h3>\n

struct<\/span> sockaddr_in<\/span> temp;<\/span>
\nsocklen_t len =<\/span> sizeof<\/span>(<\/span>temp)<\/span>;<\/span>
\nchar<\/span> buffer[<\/span>1024<\/span>]<\/span>;<\/span>
\nn =<\/span> ::<\/span>recvfrom<\/span>(<\/span>sockfd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>–<\/span>1<\/span>,<\/span> 0<\/span>,<\/span> (<\/span>struct<\/span> sockaddr<\/span>*<\/span>)<\/span>&<\/span>temp,<\/span> &<\/span>len)<\/span>;<\/span>
\nif<\/span>(<\/span>n ><\/span> 0<\/span>)<\/span>
\n {<\/span>
\n buffer[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span>
\n std::<\/span>cout <<<\/span> buffer <<<\/span> std::<\/span>endl;<\/span>
\n }<\/span><\/p>\n

\u5b8c\u6574\u4ee3\u7801<\/p>\n

#<\/span>include<\/span> <iostream><\/span><\/span>
\n#<\/span>include<\/span> <cstring><\/span><\/span>
\n#<\/span>include<\/span> <string><\/span><\/span>
\n#<\/span>include<\/span> <cstdlib><\/span><\/span>
\n#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span>
\n#<\/span>include<\/span> <netinet\/in.h><\/span><\/span>
\n#<\/span>include<\/span> <arpa\/inet.h><\/span><\/span>
\n#<\/span>define<\/span> CONV<\/span>(<\/span>v)<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>(<\/span>v)<\/span><\/span><\/span>
\nint<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\n \/\/ \u68c0\u67e5\u53c2\u6570\u6570\u91cf\u662f\u5426\u4e3a3（\u7a0b\u5e8f\u540d+\u670d\u52a1\u5668IP+\u670d\u52a1\u5668\u7aef\u53e3）<\/span>
\n if<\/span>(<\/span>argc !=<\/span> 3<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cerr <<<\/span> "Usage: "<\/span> <<<\/span> argv[<\/span>0<\/span>]<\/span> <<<\/span> " serverip serverport"<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n }<\/span>
\n \/\/ \u4ece\u547d\u4ee4\u884c\u53c2\u6570\u83b7\u53d6\u670d\u52a1\u5668IP（\u7b2c1\u4e2a\u53c2\u6570）<\/span>
\n std::<\/span>string serverip =<\/span> argv[<\/span>1<\/span>]<\/span>;<\/span>
\n \/\/ \u4ece\u547d\u4ee4\u884c\u53c2\u6570\u83b7\u53d6\u670d\u52a1\u5668\u7aef\u53e3（\u7b2c2\u4e2a\u53c2\u6570）\u5e76\u8f6c\u6362\u4e3auint16_t<\/span>
\n uint16_t<\/span> serverport =<\/span> std::<\/span>stoi<\/span>(<\/span>argv[<\/span>2<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

\/\/ 1. \u521b\u5efasocket<\/span>
\n int<\/span> sockfd =<\/span> ::<\/span>socket<\/span>(<\/span>AF_INET,<\/span> SOCK_DGRAM,<\/span> 0<\/span>)<\/span>;<\/span>
\n if<\/span>(<\/span>sockfd <<\/span> 0<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cerr <<<\/span> "socket error"<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n }<\/span><\/p>\n

\/\/ 1.1 \u586b\u5145server\u4fe1\u606f<\/span>
\n struct<\/span> sockaddr_in<\/span> server;<\/span>
\n memset<\/span>(<\/span>&<\/span>server,<\/span> 0<\/span>,<\/span> sizeof<\/span>(<\/span>server)<\/span>)<\/span>;<\/span>
\n server.<\/span>sin_family =<\/span> AF_INET;<\/span>
\n server.<\/span>sin_port =<\/span> ::<\/span>htons<\/span>(<\/span>serverport)<\/span>;<\/span>
\n server.<\/span>sin_addr.<\/span>s_addr =<\/span> ::<\/span>inet_addr<\/span>(<\/span>serverip.<\/span>c_str<\/span>(<\/span>)<\/span>)<\/span>;<\/span><\/p>\n

\/\/ 2. clientdone<\/span>
\n while<\/span>(<\/span>true<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cout <<<\/span> "Please Enter# "<\/span>;<\/span>
\n std::<\/span>string message;<\/span>
\n std::<\/span>getline<\/span>(<\/span>std::<\/span>cin,<\/span> message)<\/span>;<\/span>
\n \/\/ client \u4e0d\u9700\u8981bind\u5417？socket <-> socket<\/span>
\n \/\/ client\u5fc5\u987b\u4e5f\u8981\u6709\u81ea\u5df1\u7684ip\u548c\u7aef\u53e3！\u4f46\u662f\u5ba2\u6237\u7aef，\u4e0d\u9700\u8981\u81ea\u5df1\u663e\u793a\u7684\u8c03\u7528bind！！<\/span>
\n \/\/ \u800c\u662f，\u5ba2\u6237\u7aef\u9996\u6b21sendto\u6d88\u606f\u7684\u65f6\u5019，\u7531OS\u81ea\u52a8\u8fdb\u884cbind<\/span>
\n \/\/ 1. \u5982\u4f55\u7406\u89e3client\u81ea\u52a8\u968f\u673abind\u7aef\u53e3\u53f7？ \u4e00\u4e2a\u7aef\u53e3\u53f7，\u53ea\u80fd\u88ab\u4e00\u4e2a\u8fdb\u7a0bbind<\/span>
\n \/\/ 2. \u5982\u4f55\u7406\u89e3server\u8981\u663e\u793a\u7684bind？\u670d\u52a1\u5668\u7684\u7aef\u53e3\u53f7，\u5fc5\u987b\u7a33\u5b9a！！\u5fc5\u987b\u662f\u4f17\u6240\u5468\u77e5\u4e14\u4e0d\u80fd\u6539\u53d8\u8f7b\u6613\u6539\u53d8\u7684!<\/span>
\n int<\/span> n =<\/span> ::<\/span>sendto<\/span>(<\/span>sockfd,<\/span> message.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span>message.<\/span>size<\/span>(<\/span>)<\/span>,<\/span> 0<\/span>,<\/span> CONV<\/span>(<\/span>&<\/span>server)<\/span>,<\/span> sizeof<\/span>(<\/span>server)<\/span>)<\/span>;<\/span>
\n (<\/span>void<\/span>)<\/span>n;<\/span><\/p>\n

struct<\/span> sockaddr_in<\/span> temp;<\/span>
\n socklen_t len =<\/span> sizeof<\/span>(<\/span>temp)<\/span>;<\/span>
\n char<\/span> buffer[<\/span>1024<\/span>]<\/span>;<\/span>
\n n =<\/span> ::<\/span>recvfrom<\/span>(<\/span>sockfd,<\/span> buffer,<\/span> sizeof<\/span>(<\/span>buffer)<\/span>–<\/span>1<\/span>,<\/span> 0<\/span>,<\/span> CONV<\/span>(<\/span>&<\/span>temp)<\/span>,<\/span> &<\/span>len)<\/span>;<\/span>
\n if<\/span>(<\/span>n ><\/span> 0<\/span>)<\/span>
\n {<\/span>
\n buffer[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span>
\n std::<\/span>cout <<<\/span> buffer <<<\/span> std::<\/span>endl;<\/span>
\n }<\/span>
\n }<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u4e3b\u51fd\u6570Main<\/h2>\n

#<\/span>include<\/span> "UdpServer.hpp"<\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>int<\/span> argc,<\/span> char<\/span> *<\/span>argv[<\/span>]<\/span>)<\/span>
\n{<\/span>
\n if<\/span> (<\/span>argc !=<\/span> 2<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cerr <<<\/span> "Usage: "<\/span> <<<\/span> argv[<\/span>0<\/span>]<\/span> <<<\/span> " localport"<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n Die<\/span>(<\/span>USAGE_ERR)<\/span>;<\/span>
\n }<\/span>
\n \/\/ std::string ip = argv[1];<\/span>
\n uint16_t<\/span> port =<\/span> std::<\/span>stoi<\/span>(<\/span>argv[<\/span>1<\/span>]<\/span>)<\/span>;<\/span><\/p>\n

std::<\/span>unique_ptr<<\/span>UdpServer><\/span> svr_uptr =<\/span> std::<\/span>make_unique<\/span><<\/span>UdpServer><\/span><\/span><\/span>(<\/span>)<\/span>;<\/span>
\n svr_uptr-><\/span>InitServer<\/span>(<\/span>)<\/span>;<\/span>
\n svr_uptr-><\/span>Start<\/span>(<\/span>)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u8fd0\u884c\u540e\u6548\u679c \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u8fd0\u7528\u4e0a\u4e2a\u6587\u7ae0\u521b\u5efa\u7684InetAddr\u7c7b<\/h2>\n

\u53ea\u9700\u8981\u4fee\u6539\u670d\u52a1\u7aef<\/p>\n

#<\/span>ifndef<\/span> __UDP_SERVER_HPP__<\/span><\/span>
\n#<\/span>define<\/span> __UDP_SERVER_HPP__<\/span><\/span><\/p>\n

#<\/span>include<\/span> <iostream><\/span><\/span>
\n#<\/span>include<\/span> <string><\/span><\/span>
\n#<\/span>include<\/span> <memory><\/span><\/span>
\n#<\/span>include<\/span> <cstring><\/span><\/span>
\n#<\/span>include<\/span> <cerrno><\/span><\/span>
\n#<\/span>include<\/span> <strings.h><\/span><\/span>
\n#<\/span>include<\/span> <unistd.h><\/span><\/span><\/p>\n

#<\/span>include<\/span> <sys\/types.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/socket.h><\/span><\/span>
\n#<\/span>include<\/span> <netinet\/in.h><\/span><\/span>
\n#<\/span>include<\/span> <arpa\/inet.h><\/span><\/span>
\n#<\/span>include<\/span> "InetAddr.hpp"<\/span><\/span><\/p>\n

const<\/span> static<\/span> int<\/span> gsockfd =<\/span> –<\/span>1<\/span>;<\/span>
\nconst<\/span> static<\/span> std::<\/span>string gdefaultip =<\/span> "127.0.0.1"<\/span>;<\/span> \/\/ \u8868\u793a\u672c\u5730\u4e3b\u673a<\/span>
\nconst<\/span> static<\/span> uint16_t<\/span> gdefaultport =<\/span> 8080<\/span>;<\/span><\/p>\n

#<\/span>define<\/span> Die<\/span>(<\/span>code)<\/span> <\/span>\\\\<\/span>
\n do<\/span> <\/span>\\\\<\/span>
\n {<\/span> <\/span>\\\\<\/span>
\n exit<\/span>(<\/span>code)<\/span>;<\/span> <\/span>\\\\<\/span>
\n }<\/span> while<\/span> (<\/span>0<\/span>)<\/span><\/span><\/span><\/p>\n

#<\/span>define<\/span> CONV<\/span>(<\/span>v)<\/span> (<\/span>struct<\/span> sockaddr<\/span> *<\/span>)<\/span>(<\/span>v)<\/span><\/span><\/span>
\n\/\/\u5b8f\u8f6c<\/span><\/p>\n

enum<\/span>
\n{<\/span>
\n USAGE_ERR =<\/span> 1<\/span>,<\/span>
\n SOCKET_ERR,<\/span>
\n BIND_ERR
\n}<\/span>;<\/span><\/p>\n

class<\/span> UdpServer<\/span>
\n{<\/span>
\npublic<\/span>:<\/span>
\n UdpServer<\/span>(<\/span>uint16_t<\/span> port =<\/span> gdefaultport)<\/span>
\n :<\/span> _sockfd<\/span>(<\/span>gsockfd)<\/span>,<\/span>
\n _addr<\/span>(<\/span>port)<\/span>,<\/span>
\n _isrunning<\/span>(<\/span>false<\/span>)<\/span>
\n {<\/span>
\n }<\/span>
\n \/\/ \u90fd\u662f\u5957\u8def<\/span>
\n void<\/span> InitServer<\/span>(<\/span>)<\/span>
\n {<\/span>
\n \/\/ 1. \u521b\u5efasocket<\/span>
\n _sockfd =<\/span> ::<\/span>socket<\/span>(<\/span>AF_INET,<\/span> SOCK_DGRAM,<\/span> 0<\/span>)<\/span>;<\/span> \/\/ IP?PORT?\u7f51\u7edc？\u672c\u5730？<\/span>
\n if<\/span> (<\/span>_sockfd <<\/span> 0<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cout <<<\/span> "socket: "<\/span> <<<\/span> strerror<\/span>(<\/span>errno)<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n Die<\/span>(<\/span>SOCKET_ERR)<\/span>;<\/span>
\n }<\/span>
\n std::<\/span>cout <<<\/span> "socket success, sockfd is : "<\/span> <<<\/span> _sockfd <<<\/span> std::<\/span>endl;<\/span><\/p>\n

\/\/ \/\/ 2. \u586b\u5145\u7f51\u7edc\u4fe1\u606f，\u5e76bind\u7ed1\u5b9a<\/span>
\n \/\/ \/\/ 2.1 \u6709\u6ca1\u6709\u628asocket\u4fe1\u606f，\u8bbe\u7f6e\u8fdb\u5165\u5185\u6838\u4e2d？？\u6ca1\u6709，\u53ea\u662f\u586b\u5145\u4e86\u7ed3\u6784\u4f53！<\/span>
\n \/\/ struct sockaddr_in local;<\/span>
\n \/\/ bzero(&local, sizeof(local));<\/span>
\n \/\/ local.sin_family = AF_INET;<\/span>
\n \/\/ local.sin_port = ::htons(_port); \/\/ \u8981\u88ab\u53d1\u9001\u7ed9\u5bf9\u65b9\u7684，\u5373\u8981\u53d1\u5230\u7f51\u7edc\u4e2d！<\/span>
\n \/\/ \/\/local.sin_addr.s_addr = ::inet_addr(_ip.c_str()); \/\/ 1. string ip->4bytes 2. network order \/\/TODO<\/span>
\n \/\/ local.sin_addr.s_addr = INADDR_ANY;<\/span>
\n \/\/ \/\/INADDR_ANY:\u8868\u793a"\u4efb\u610f\u53ef\u7528\u7684\u7f51\u7edc\u63a5\u53e3"\u6216"\u6240\u6709\u672c\u5730IP\u5730\u5740"\u3002<\/span><\/p>\n

\/\/ 2.2 bind ： \u8bbe\u7f6e\u8fdb\u5165\u5185\u6838\u4e2d<\/span>
\n int<\/span> n =<\/span> ::<\/span>bind<\/span>(<\/span>_sockfd,<\/span> _addr.<\/span>NetAddr<\/span>(<\/span>)<\/span>,<\/span> _addr.<\/span>NetAddrLen<\/span>(<\/span>)<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>n <<\/span> 0<\/span>)<\/span>
\n {<\/span>
\n std::<\/span>cout <<<\/span> "bind: "<\/span> <<<\/span> strerror<\/span>(<\/span>errno)<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n Die<\/span>(<\/span>BIND_ERR)<\/span>;<\/span>
\n }<\/span>
\n std::<\/span>cout <<<\/span> "bind success"<\/span> <<<\/span> std::<\/span>endl;<\/span>
\n }<\/span>
\n void<\/span> Start<\/span>(<\/span>)<\/span>
\n {<\/span>
\n _isrunning =<\/span> true<\/span>;<\/span>
\n while<\/span> (<\/span>true<\/span>)<\/span>
\n {<\/span>
\n char<\/span> inbuffer[<\/span>1024<\/span>]<\/span>;<\/span> \/\/ string<\/span>
\n struct<\/span> sockaddr_in<\/span> peer;<\/span>
\n socklen_t len =<\/span> sizeof<\/span>(<\/span>peer)<\/span>;<\/span> \/\/ \u5fc5\u987b\u8bbe\u5b9a<\/span><\/p>\n

ssize_t n =<\/span> ::<\/span>recvfrom<\/span>(<\/span>_sockfd,<\/span> inbuffer,<\/span> sizeof<\/span>(<\/span>inbuffer)<\/span> –<\/span> 1<\/span>,<\/span> 0<\/span>,<\/span> CONV<\/span>(<\/span>&<\/span>peer)<\/span>,<\/span> &<\/span>len)<\/span>;<\/span>
\n if<\/span> (<\/span>n ><\/span> 0<\/span>)<\/span>
\n {<\/span>
\n \/\/ 1. \u6d88\u606f\u5185\u5bb9 && 2. \u8c01\u53d1\u7ed9\u6211\u7684<\/span>
\n \/\/ uint16_t clientport = ::ntohs(peer.sin_port);<\/span>
\n \/\/ std::string clientip = ::inet_ntoa(peer.sin_addr);<\/span><\/p>\n

InetAddr cli<\/span>(<\/span>peer)<\/span>;<\/span>
\n inbuffer[<\/span>n]<\/span> =<\/span> 0<\/span>;<\/span><\/p>\n

std::<\/span>string clientinfo =<\/span> cli.<\/span>Ip<\/span>(<\/span>)<\/span> +<\/span> ":"<\/span> +<\/span> std::<\/span>to_string<\/span>(<\/span>cli.<\/span>Port<\/span>(<\/span>)<\/span>)<\/span> +<\/span> " # "<\/span> +<\/span> inbuffer;<\/span><\/p>\n

std::<\/span>cout <<<\/span> clientinfo <<<\/span>std::<\/span>endl;<\/span><\/p>\n

std::<\/span>string echo_string =<\/span> "echo# "<\/span>;<\/span>
\n echo_string +=<\/span> inbuffer;<\/span><\/p>\n

::<\/span>sendto<\/span>(<\/span>_sockfd,<\/span> echo_string.<\/span>c_str<\/span>(<\/span>)<\/span>,<\/span> echo_string.<\/span>size<\/span>(<\/span>)<\/span>,<\/span> 0<\/span>,<\/span> CONV<\/span>(<\/span>&<\/span>peer)<\/span>,<\/span> sizeof<\/span>(<\/span>peer)<\/span>)<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n _isrunning =<\/span> false<\/span>;<\/span>
\n }<\/span>
\n ~<\/span>UdpServer<\/span>(<\/span>)<\/span>
\n {<\/span>
\n if<\/span>(<\/span>_sockfd ><\/span> gsockfd)<\/span>
\n ::<\/span>close<\/span>(<\/span>_sockfd)<\/span>;<\/span>
\n }<\/span><\/p>\n

private<\/span>:<\/span>
\n int<\/span> _sockfd;<\/span>
\n InetAddr _addr;<\/span>
\n \/\/ uint16_t _port; \/\/ \u670d\u52a1\u5668\u672a\u6765\u7684\u7aef\u53e3\u53f7<\/span>
\n \/\/ \/\/ std::string _ip; \/\/ \u670d\u52a1\u5668\u6240\u5bf9\u5e94\u7684IP<\/span>
\n bool<\/span> _isrunning;<\/span> \/\/ \u670d\u52a1\u5668\u8fd0\u884c\u72b6\u6001<\/span>
\n}<\/span>;<\/span><\/p>\n

#<\/span>endif<\/span><\/span><\/p>\n

\u5982\u679c\u4f5c\u8005\u54ea\u91cc\u9519\u8bef\u8bf7\u53ca\u65f6\u63d0\u51fa，\u8c22\u8c22\u5927\u5bb6！<\/p>\n","protected":false},"excerpt":{"rendered":"

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