📄 178.htm

📁 unix高级编程原吗
💻 HTM
字号:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>CTerm非常精华下载</title>
</head>
<body bgcolor="#FFFFFF">
<table border="0" width="100%" cellspacing="0" cellpadding="0" height="577">
<tr><td width="32%" rowspan="3" height="123"><img src="DDl_back.jpg" width="300" height="129" alt="DDl_back.jpg"></td><td width="30%" background="DDl_back2.jpg" height="35"><p align="center"><a href="http://apue.dhs.org"><font face="黑体"><big><big>123</big></big></font></a></td></tr>
<tr>
<td width="68%" background="DDl_back2.jpg" height="44"><big><big><font face="黑体"><p align="center">               ● UNIX网络编程                       (BM: clown)                </font></big></big></td></tr>
<tr>
<td width="68%" height="44" bgcolor="#000000"><font face="黑体"><big><big><p   align="center"></big></big><a href="http://cterm.163.net"><img src="banner.gif" width="400" height="60" alt="banner.gif"border="0"></a></font></td>
</tr>
<tr><td width="100%" colspan="2" height="100" align="center" valign="top"><br><p align="center">[<a href="index.htm">回到开始</a>][<a href="155.htm">上一层</a>][<a href="179.htm">下一篇</a>]
<hr><p align="left"><small>发信人: digger (欧阳疯), 信区: Socket <br>

标  题: RAW sockets example code: tcp.c <br>

发信站: 华南网木棉站 (Wed Aug  5 19:58:27 1998), 转信 <br>

/* Generate a TCP packet <br>

 * with a FIN flag and pass it through a raw socket. <br>

 * <br>

 * Thamer Al-Herbish shadows@whitefang.com <br>

 */ <br>

#include <stdlib.h> <br>

#include <stdio.h> <br>

#include <sys/types.h> <br>

#include <sys/socket.h> <br>

#include <netinet/in.h> <br>

#include <arpa/inet.h> <br>

#include <netinet/in_systm.h> <br>

#if defined(LINUX) <br>

#include <linux/ip.h> <br>

#include <linux/tcp.h> <br>

#else <br>

#include <netinet/ip.h> <br>

#include <netinet/tcp.h> <br>

#endif <br>

#include <string.h> <br>



#include <unistd.h> <br>

#include <time.h> <br>

#include <rawsock_utils.h> <br>

int main(int argc,char *argv[]) <br>

{ <br>

  unsigned char packet[ <br>

#if !defined(LINUX) <br>

  sizeof(struct ip) + <br>

#else /* LINUX */ <br>

  sizeof(struct iphdr) + <br>

#endif /* LINUX */ <br>

  sizeof(struct tcphdr)]; <br>

  struct sockaddr_in mysocket; <br>

  unsigned short sport, dport; <br>

  struct in_addr saddr, daddr; <br>

  struct tcphdr *tcp; <br>

  unsigned long seq, ack; <br>

  int sockd, on = 1; <br>

  if(argc < 5)  { <br>

    fprintf(stderr,"usage: %s source_port source_address dest_port dest_addr <br>

ess\ <br>

", <br>

", <br>

            argv[0]); <br>

    exit(1); <br>

  } <br>

  sport = (unsigned short)atoi(argv[1]); <br>

  saddr.s_addr = inet_addr(argv[2]); <br>

  dport = (unsigned short)atoi(argv[3]); <br>

  daddr.s_addr = inet_addr(argv[4]); <br>

  if((sockd = socket(AF_INET,SOCK_RAW,IPPROTO_RAW)) < 0)  { <br>

    perror("socket"); <br>

    exit(1); <br>

  } <br>

  if(setsockopt(sockd,IPPROTO_IP,IP_HDRINCL,(char *)&on,sizeof(on)) < 0)  { <br>

    perror("setsockopt"); <br>

    exit(1); <br>

  } <br>

  /* Very bad random sequence number generator */ <br>

  srand(getpid()); <br>

  seq = rand()%time(NULL); <br>

  ack = rand()%time(NULL); <br>

  ip_gen(packet,IPPROTO_TCP,saddr,daddr,sizeof(packet)); <br>

#if !defined(LINUX) <br>

  tcp = (struct tcphdr *)(packet + sizeof(struct ip)); <br>



  tcp_gen((char *)tcp,sport,dport,seq,ack); <br>

#if !defined(SOLARIS_CKSUM_BUG) <br>

  tcp->th_sum = trans_check(IPPROTO_TCP,(char *)tcp, <br>

                            sizeof(struct tcphdr), <br>

                            saddr, <br>

                            daddr); <br>

#else /* SOLARIS_CKSUM_BUG */ <br>

  tcp->th_sum = sizeof(struct tcphdr); <br>

#endif /* SOLARIS_CKSUM_BUG */ <br>

#else /* LINUX */ <br>

  tcp = (struct tcphdr *)(packet + sizeof(struct iphdr)); <br>

  tcp_gen((char *)tcp,sport,dport,seq,ack); <br>

#if !defined(SOLARIS_CKSUM_BUG) <br>

  tcp->check = trans_check(IPPROTO_TCP,(char *)tcp, <br>

                           sizeof(struct tcphdr), <br>

                           saddr, <br>

                           daddr); <br>

#else /* SOLARIS_CKSUM_BUG */ <br>

  tcp->check = sizeof(struct tcphdr); <br>

#endif /* SOLARIS_CKSUM_BUG */ <br>

#endif /* LINUX */ <br>

  memset(&mysocket,'\0',sizeof(mysocket)); <br>



  mysocket.sin_family = AF_INET; <br>

  mysocket.sin_port = htons(dport); <br>

  mysocket.sin_addr = daddr; <br>

  if(sendto(sockd,&packet,sizeof(packet),0x0,(struct sockaddr *)&mysocket, <br>

            sizeof(mysocket)) != sizeof(packet))  { <br>

    perror("sendto"); <br>

    exit(1); <br>

  } <br>

  exit(0); <br>

} <br>

-- <br>

                #################### <br>

                #  遥  眺  淑  女  # <br>

                ####################################### <br>

                                   #  君  子  好  球  # <br>

                                   #################### <br>

</small><hr>
<p align="center">[<a href="index.htm">回到开始</a>][<a href="155.htm">上一层</a>][<a href="179.htm">下一篇</a>]
<p align="center"><a href="http://cterm.163.net">欢迎访问Cterm主页</a></p>
</table>
</body>
</html>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -