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<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="135.htm">上一层</a>][<a href="147.htm">下一篇</a>]
<hr><p align="left"><small>发信人: guru (好读书，不求甚解), 信区: UNP <br>

标  题: myxray.c <br>

发信站: UNIX编程 (2001年08月07日16:24:07 星期二), 站内信件 <br>

  <br>

发信人: sztcww (姑苏一鬼), 信区: Socket <br>

标  题: myxray.c <br>

发信站: 华南网木棉站 (Thu Feb 17 22:54:46 2000), 转信 <br>

  <br>

上学期,SCZ大哥老是叫我抓几个包看看 <br>

可是我苦于找不到工具,找到了又下不下来 <br>

于是自己乱拼了个程序,酬和着能用吧 <br>

程序使用说明如下 <br>

myxray dstip <br>

给出目的地址是dstip的所有包的头结构的数据 <br>

包括以太侦头，arp包，ip包，tcp包,udp包,icmp包 <br>

各个字段的值 <br>

  <br>

该程序在REDHAT 6.0下编译通过 <br>

//myxray.c <br>

#include <netdb.h> <br>

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

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

#include <stdio.h> <br>



#include <errno.h> <br>

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

#include <net/if.h> <br>

#include <signal.h> <br>

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

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

#include <string.h> <br>

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

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

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

#define __FAVOR_BSD <br>

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

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

#define PACKET_SIZE 4096 <br>

#define ETH_HW_ADDR_LEN 6 <br>

#define IP_ADDR_LEN 4 <br>

struct arp_packet <br>

        { <br>

        u_char targ_hw_addr[ETH_HW_ADDR_LEN]; <br>

        u_char src_hw_addr[ETH_HW_ADDR_LEN]; <br>

        u_short frame_type; <br>

        u_short hw_type; <br>



        u_short prot_type; <br>

        u_char hw_addr_size; <br>

        u_char prot_addr_size; <br>

        u_short op; <br>

        u_char sndr_hw_addr[ETH_HW_ADDR_LEN]; <br>

        u_char sndr_ip_addr[IP_ADDR_LEN]; <br>

        u_char rcpt_hw_addr[ETH_HW_ADDR_LEN]; <br>

        u_char rcpt_ip_addr[IP_ADDR_LEN]; <br>

        u_char padding[18]; <br>

        } ; <br>

void leave(); <br>

char * <br>

hwaddr (unsigned char  *,char *); <br>

int fd_recv = -1 ; <br>

struct ifreq ifr,ifr_old; <br>

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

{ <br>

 char device[] = "eth0"; // ethernet device name <br>

 char protocol[16]; <br>

 u_char buf_recv[PACKET_SIZE]; // buffer for receive <br>

 u_short i = 0; // packet number <br>

 int ihl; <br>

 int ihl; <br>

 int ethprotol; <br>

 int ipfragoff,df,mf; <br>

 int protol; <br>

 char buf1[20],buf2[20]; <br>

 char strptr[255]; <br>

 char *srcaddr,*dstaddr; <br>

 struct ethhdr *eth ; <br>

 struct arp_packet *arphead; <br>

 struct udphdr *udp; <br>

 struct icmp *icmphdr; <br>

 struct iphdr * ip; <br>

 struct tcphdr * tcp1; <br>

 struct in_addr in1; <br>

 struct in_addr in2; <br>

 int from_len, datalen; <br>

 struct sockaddr from; <br>

 if (argc!=2) { <br>

  printf("Hi,dear friends,tell me your advice Good Luck\n"); <br>

  printf("Usage:%s dstIP \n",argv[0]); <br>

  exit(-1); <br>

  } <br>

 fd_recv = socket(AF_INET, SOCK_PACKET, htons(0x0003)); <br>



 if (fd_recv < 0) { perror( "packet socket error"); exit(-1); } <br>

 strcpy(ifr.ifr_name, device); <br>

 if (ioctl(fd_recv, SIOCGIFFLAGS, &ifr) < 0 ) { <br>

  perror("ioctl SIOCGIFFLAGS error"); <br>

  if (fd_recv >= 0) close(fd_recv); <br>

  exit(-1); <br>

 } <br>

 ifr_old = ifr; <br>

 ifr.ifr_flags |= IFF_PROMISC; <br>

 if (ioctl(fd_recv, SIOCSIFFLAGS, &ifr) < 0 ) { <br>

  perror("ioctl SIOCSIFFLAGS error"); <br>

  if (fd_recv >= 0) close(fd_recv); <br>

   exit(-1); <br>

 } <br>

 signal(SIGINT, leave); <br>

 signal(SIGTERM, leave); <br>

AGAIN: <br>

 bzero(&from, sizeof(from)); <br>

 from_len = sizeof(from); <br>

 bzero(buf_recv, PACKET_SIZE); <br>

 datalen = recvfrom(fd_recv, (char *)buf_recv, 4096, 0, <br>

  &from, &from_len); <br>



 if (datalen < 0) { <br>

  perror("recvfrom error"); <br>

  exit(-1); <br>

 } <br>

 buf_recv[datalen] = '\0'; <br>

 //if (strcmp(device, from.sa_data) != 0) goto AGAIN; <br>

 eth=(struct ethhdr *)buf_recv; <br>

 ethprotol=ntohs(eth->h_proto); <br>

 if (ethprotol==0x0806){//arp <br>

  arphead=(struct arp_packet *)buf_recv; <br>

  memcpy(&in1,arphead->sndr_ip_addr, IP_ADDR_LEN); <br>

         memcpy(&in2,arphead->rcpt_ip_addr, IP_ADDR_LEN); <br>

         srcaddr=inet_ntoa(in1); <br>

         dstaddr=inet_ntop(AF_INET,&in2,strptr,sizeof(strptr)); <br>

  if (strcmp(dstaddr,argv[1])==0) <br>

  { <br>

  printf("ethhdr\nsrchw:%s--->dsthw:%s proto:%xH\n", <br>

  hwaddr(eth->h_source,buf1),hwaddr(eth->h_dest,buf2),ethprotol); <br>

  printf("arphdr\nhwtype:%d protol:%xH hw_size:%d pro_size:%d <br>

  op:%d\ns_ha:%s s_ip:%s\nd_ha:%s d_ip:%s\n",ntohs(arphead->hw_type), <br>

  ntohs(arphead->prot_type),arphead->hw_addr_size, <br>

  arphead->prot_addr_size,ntohs(arphead->op), <br>



  hwaddr(arphead->sndr_hw_addr,buf1),srcaddr, <br>

  hwaddr(arphead->rcpt_hw_addr,buf2),dstaddr); <br>

  printf("-----------------------------------------------------------\n"); <br>

  } <br>

  goto AGAIN; <br>

 } <br>

 ip = (struct iphdr *)&buf_recv[14]; <br>

 ihl = (int)ip->ihl << 2; <br>

 in1.s_addr = ip->saddr; <br>

 in2.s_addr = ip->daddr; <br>

 srcaddr=inet_ntoa(in1); <br>

 dstaddr=inet_ntop(AF_INET,&in2,strptr,sizeof(strptr)); <br>

 if (strcmp(dstaddr,argv[1])==0) <br>

 { <br>

 //do with ethhdr data <br>

 printf("ethhdr\nsrchw:%s--->dsthw:%s proto:%xH\n",hwaddr(eth->h_source,buf1), <br>

 hwaddr(eth->h_dest,buf2),ethprotol); <br>

 //iphdr <br>

 protol=ip->protocol; <br>

 ipfragoff=ntohs(ip->frag_off); <br>

 df=ipfragoff&IP_DF; <br>

 mf=ipfragoff&IP_MF; <br>



  if (df!=0) df=1; <br>

 if (mf!=0) mf=1; <br>

 printf("iphdr\nver:%d ihl:%d tos:%d tot_len:%d id:%d df:%d mf:%d <br>

 fragoff:%d TTL:%d proto:%d\nsrcaddr:%s dstaddr:%s\n",ip->version,ip->ihl, <br>

 ip->tos,ntohs(ip->tot_len),ntohs(ip->id),df,mf,ipfragoff&IP_OFFMASK,ip->ttl, <br>

 protol,srcaddr,dstaddr); <br>

 if (protol==6){//tcp <br>

  //tcphdr <br>

  tcp1 = (struct tcphdr *)&buf_recv[14 + ihl]; <br>

  printf("tcphdr\nsrcport:%d dstport:%d seq:%u ack:%u off:%d <br>

  flag:%d win:%d\n",ntohs(tcp1->th_sport),ntohs(tcp1->th_dport), <br>

  ntohl(tcp1->th_seq),ntohl(tcp1->th_ack),tcp1->th_off, <br>

  tcp1->th_flags,ntohs(tcp1->th_win)); <br>

 printf("-----------------------------------------------------------\n"); <br>

 } <br>

 if (protol==1){//icmp <br>

  icmphdr=(struct icmp *)&buf_recv[14 + ihl]; <br>

  printf("icmp\ntype:%d code:%d\n",icmphdr->icmp_type,icmphdr->icmp_code); <br>

 printf("-----------------------------------------------------------\n"); <br>

 } <br>

 if (protol==17){//udphdr <br>

  udp= (struct udphdr *)&buf_recv[14 + ihl]; <br>



  printf("udphdr\nsport:%d dsport:%d len:%d\n",ntohs(udp->uh_sport), <br>

  ntohs(udp->uh_dport),ntohs(udp->uh_ulen)); <br>

 printf("-----------------------------------------------------------\n"); <br>

 } <br>

 fflush(stdout); <br>

 } <br>

 goto AGAIN; <br>

} <br>

char * <br>

hwaddr (unsigned char * s,char *d) <br>

{ <br>

sprintf (d, "%02X:%02X:%02X:%02X:%02X:%02X", s[0], s[1], s[2], s[3], <br>

s[4], s[5]); <br>

return d; <br>

} <br>

void leave() <br>

{ <br>

if (ioctl(fd_recv, SIOCSIFFLAGS, &ifr_old) < 0) { <br>

perror("ioctl SIOCSIFFLAGS error"); <br>

} <br>

if (fd_recv > 0) close(fd_recv); <br>

printf("process terminamted.\n"); <br>



exit(0); <br>

} <br>

-- <br>

Target Locked:Guru In Darkness. <br>

我只是一只静静卧着的狮子。。。 <br>

※ 来源:·UNIX编程 www.tiaozhan.com/unixbbs/·[FROM: 202.114.36.224] <br>

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