⭐ 欢迎来到虫虫下载站！ | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站
📤 上传资源

📄 431.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>apue</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="317.htm">上一层</a>][<a href="432.htm">下一篇</a>]
<hr><p align="left"><small>发信人: AngelFalls (Happiness Forever), 信区: Security <br>

标  题: anti_sniffer程序 <br>

发信站: 武汉白云黄鹤站 (Wed Mar 29 18:18:54 2000), 站内信件 <br>

#include <netdb.h> <br>

#include <stdio.h> <br>

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

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

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

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

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

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

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

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

#include <string.h> <br>

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

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

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

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

#include <unistd.h> <br>

#include <fcntl.h> <br>

struct arp_hdr{ <br>

        u_char  dst_addr[6]; <br>

        u_char  src_addr[6]; <br>



        u_short frame_type; <br>

        u_short hw_type; <br>

        u_short proto_type; <br>

        u_char  hw_addr_len; <br>

        u_char  proto_addr_len; <br>

        u_short op; <br>

        u_char  snd_hw_addr[6]; <br>

        u_char  snd_ip_addr[4]; <br>

        u_char  rcv_hw_addr[6]; <br>

        u_char  rcv_ip_addr[4]; <br>

}; <br>

void dealARP(struct arp_hdr *ahdr) <br>

{ <br>

        struct in_addr daddr, saddr; <br>

        char str_s[32], str_d[32]; <br>

        printf("\nARP datagram from %.2x:%.2x:%.2x:%.2x:%.2x:%.2x to %.2x:%. <br>

2x:% <br>

.2x:%.2x:%.2x:%.2x\n", <br>

                ahdr->src_addr[0], ahdr->src_addr[1], ahdr->src_addr[2], ahd <br>

r->s <br>

rc_addr[3], <br>

                ahdr->src_addr[4], ahdr->src_addr[5], ahdr->dst_addr[0], ahd <br>



r->d <br>

st_addr[1], <br>

                ahdr->dst_addr[2], ahdr->dst_addr[3], ahdr->dst_addr[4], ahd <br>

r->d <br>

st_addr[5]); <br>

        switch( ntohs(ahdr->op) ) <br>

        { <br>

                case 1: <br>

                        printf("Operation : ARP Request\n"); <br>

                        break; <br>

                case 2: <br>

                        printf("Operation : ARP Reply\n"); <br>

                        break; <br>

                case 3: <br>

                        printf("Operation : RARP Request\n"); <br>

                        break; <br>

                case 4: <br>

                        printf("Operation : RARP Reply\n"); <br>

                        break; <br>

                default: <br>

                        printf("Operation : %d\n", ntohs(ahdr->op)); <br>

                        break; <br>



        } <br>

        memcpy(&daddr, ahdr->rcv_ip_addr, 4); <br>

        memcpy(&saddr, ahdr->snd_ip_addr, 4); <br>

        strcpy(str_s, inet_ntoa(saddr)); <br>

        strcpy(str_d, inet_ntop(AF_INET, &daddr, str_d, sizeof(str_d))); <br>

        printf("Source IP : %s, Dest IP : %s\n", str_s, str_d); <br>

} <br>

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

{ <br>

        int sock_pak, i, flag, verbose = 0; <br>

        struct ifreq ifr; <br>

        struct sockaddr_in *sa, sa_in; <br>

        struct sockaddr sa_local; <br>

        u_int32_t  nmask, uni_ip, brd_ip, t_ip, t_ip2, dst; <br>

        u_char ucMac[6], recvbuf[1024]; <br>

        struct arp_hdr *ahdr = (struct arp_hdr*)recvbuf; <br>

        if( argc != 1 && argc != 2) <br>

        { <br>

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

                exit(-1); <br>

        } <br>

        if( argc == 2 ) <br>



                if( strcmp(argv[1], "-v")==0 ) <br>

                        verbose = 1; <br>

                else <br>

                { <br>

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

                        exit(-1); <br>

                } <br>

        if( (sock_pak = socket(PF_INET, SOCK_PACKET, htons(ETH_P_ARP))) < 0 <br>

) <br>

        { <br>

                perror("Socket"); <br>

                exit(-1); <br>

        } <br>

        setuid(getuid()); <br>

        strcpy(ifr.ifr_name, "eth0"); <br>

        if( ioctl(sock_pak, SIOCGIFHWADDR, &ifr) < 0 ) <br>

        { <br>

                perror("Ioctl SIOGIFHWADDR"); <br>

                exit(-1); <br>

        } <br>

        memcpy(ucMac, &ifr.ifr_hwaddr.sa_data, 6); <br>

        printf("Eth0 MAC : %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n", ucMac[0], ucMac <br>



[1], <br>

                ucMac[2], ucMac[3], ucMac[4], ucMac[5]); <br>

        if( ioctl(sock_pak, SIOCGIFADDR, &ifr) < 0 ) <br>

        { <br>

                perror("Ioctl SIOGIFADDR"); <br>

                exit(-1); <br>

        } <br>

        sa = (struct sockaddr_in*)&ifr.ifr_addr; <br>

        uni_ip = ntohl(sa->sin_addr.s_addr); <br>

        printf("Eth0 IP : %s\n", inet_ntoa(sa->sin_addr)); <br>

        if( ioctl(sock_pak, SIOCGIFBRDADDR, &ifr) < 0 ) <br>

        { <br>

                perror("Ioctl SIOCGIFBRDADDR"); <br>

                exit(-1); <br>

        } <br>

        sa = (struct sockaddr_in*)&ifr.ifr_broadaddr; <br>

        brd_ip = ntohl(sa->sin_addr.s_addr); <br>

        printf("Eth0 BCast IP : %s\n", inet_ntoa(sa->sin_addr)); <br>

        if( ioctl(sock_pak, SIOCGIFNETMASK, &ifr) < 0 ) <br>

        { <br>

                perror("Ioctl SIOGGIFNETMASK"); <br>

                exit(-1); <br>



        } <br>

        sa = (struct sockaddr_in*)&ifr.ifr_netmask; <br>

        nmask = ntohl(sa->sin_addr.s_addr); <br>

        sa = (struct sockaddr_in*)&ifr.ifr_netmask; <br>

        printf("Eth0 Netmask : %s\n", inet_ntoa(sa->sin_addr)); <br>

        if( ( flag = fcntl(sock_pak, F_GETFL, 0)) < 0 ) <br>

        { <br>

                perror("Fcntl F_GETFL"); <br>

                exit(-1); <br>

        } <br>

        if( fcntl(sock_pak, F_SETFL, flag | O_NONBLOCK) < 0 ) <br>

        { <br>

                perror("Fcntl F_SETFL"); <br>

                exit(-1); <br>

        } <br>

        for(i=0; i<80; i++) <br>

                printf("+"); <br>

        printf("\n> Scanning...\n"); <br>

        for(dst = (nmask & uni_ip)+1; dst < brd_ip; dst++) <br>

        { <br>

                bzero(recvbuf, 1024); <br>

                memset(ahdr->dst_addr, 0, 6); <br>



                memset(ahdr->dst_addr, 0xff, 1); <br>

                memcpy(ahdr->src_addr, ucMac, 6); <br>

                ahdr->frame_type = htons(0x0806); //ethernet frame <br>

                ahdr->hw_type = htons(1);         //ethernet hw <br>

                ahdr->proto_type = htons(0x0800); <br>

                ahdr->hw_addr_len = 6; <br>

                ahdr->proto_addr_len = 4; <br>

                ahdr->op = htons(0x0001); <br>

                memcpy(ahdr->snd_hw_addr, ucMac, 6); <br>

                t_ip = htonl(uni_ip); <br>

                memcpy(ahdr->snd_ip_addr, &t_ip, 4); <br>

                memset(ahdr->rcv_hw_addr, 0, 6); <br>

                t_ip = htonl(dst); <br>

                memcpy(ahdr->rcv_ip_addr, &t_ip, 4); <br>

                sa_local.sa_family = AF_LOCAL; <br>

                strcpy(sa_local.sa_data, "eth0"); <br>

                if( sendto(sock_pak, recvbuf, sizeof(struct arp_hdr), 0, &sa <br>

_loc <br>

al, sizeof(sa_local)) < 0 ) <br>

                        perror("Sendto"); <br>

                usleep(10); <br>

                i = recvfrom(sock_pak, recvbuf, 1024, 0, &sa_local, &flag); <br>



                if( i < sizeof(struct arp_hdr) ) <br>

                        continue; <br>

                memcpy(&t_ip, ahdr->rcv_ip_addr, 4); <br>

                memcpy(&t_ip2, ahdr->snd_ip_addr, 4); <br>

                if( ntohs(ahdr->op) == 0x0002 && ntohl(t_ip) == uni_ip <br>

                        && dst - ntohl(t_ip2) >= 0 && dst - ntohl(t_ip2) <= <br>

2 ) <br>

                { <br>

                        bzero(&sa_in, sizeof(struct sockaddr_in)); <br>

                        sa_in.sin_family = AF_INET; <br>

                        sa_in.sin_addr.s_addr = t_ip2; <br>

                        printf("> Host %s Promisc Mode detected\n", inet_nto <br>

a(sa <br>

_in.sin_addr)); <br>

                } <br>

                else if(verbose) <br>

                        dealARP(ahdr); <br>

        } <br>

        printf("> Scanning End.\n"); <br>

} <br>

-- <br>

  Wish your sky be sunny, <br>



   Wish your heart be happy, <br>

    Wish your body be healthy, <br>

     Wish U never be lazy. <br>

  :) :> ;) ;> :-) :-> ;-) ;-> <br>

</small><hr>
<p align="center">[<a href="index.htm">回到开始</a>][<a href="317.htm">上一层</a>][<a href="432.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 + -