使用Visual Studio C++ 6.0和网络接口套接字Socket进行Windows环境下的网络编程，运用原始嵌套字RAW_SOCKET从IP层开始构造整个ICMP报文，通过ICMP协议所提供的回送请求(echo request)和回送应答(echo reply)这两种报文实现检测目的站的可达性与状态
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001391s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.085025s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001400s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001171s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001943s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004499s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001200s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003460s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014275s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001110s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 529821 [ RunTime:0.028913s ]
