#include #pragma comment(lib,"ws2_32.lib") /*链接api相关连的ws2_32.lib静态库*/

#define max_hostname_lan 255

#define sio_rcvall _wsaiow(ioc_vendor,1)

#define max_addr_len 16

struct ipheader {

unsigned char ip_hl:4; /*header length(报头长度)*/

unsigned char ip_v:4; /*version(版本)*/

unsigned char ip_tos; /*type os service服务类型*/

unsigned short int ip_len; /*total length (总长度)*/

unsigned short int ip_id; /*identification (标识符)*/

unsigned short int ip_off; /*fragment offset field(段移位域)*/

unsigned char ip_ttl; /*time to live (生存时间)*/

unsigned char ip_p; /*protocol(协议)*/

unsigned short int ip_sum; /*checksum(校验和)*/

unsigned int ip_src; /*source address(源地址)*/

unsigned int ip_dst; /*destination address(目的地址)*/

}; /* total ip header length: 20 bytes (=160 bits) */

typedef struct tcpheader {

unsigned short int sport; /*source port (源端口号)*/

unsigned short int dport; /*destination port(目的端口号)*/

unsigned int th_seq; /*sequence number(包的序列号)*/

unsigned int th_ack; /*acknowledgement number(确认应答号)*/

unsigned char th_x:4; /*unused(未使用)*/

unsigned char th_off:4; /*data offset(数据偏移量)*/

unsigned char flags; /*标志全*/

unsigned short int th_win; /*windows(窗口)*/

unsigned short int th_sum; /*checksum(校验和)*/

unsigned short int th_urp; /*urgent pointer(紧急指针)*/

}tcp_hdr;

typedef struct udphdr {

unsigned short sport; /*source port(源端口号)*/

unsigned short dport; /*destination port(目的端口号)*/

unsigned short len; /*udp length(udp长度)*/

unsigned short cksum; /*udp checksum(udp校验和)*/

}udp_hdr;

void main(){

socket sock;

wsadata wsd;

dword dwbytesret;

unsigned int optval = 1;

unsigned char *dataudp,*datatcp;

int i,pcount=0,lentcp, lenudp;

sockaddr_in sa,sasource, sadest;

struct hostent far * phostent;

char far name[max_hostname_lan];

char szsourceip[max_addr_len], szdestip[max_addr_len],recvbuf[65535] = {0};

struct udphdr *pudpheader;

struct ipheader *pipheader;

struct tcpheader *ptcpheader;

wsastartup(makeword(2,1),&wsd);

if ((sock = socket(af_inet, sock_raw, ipproto_ip))==socket_error)

exit(1);

gethostname(name, max_hostname_lan);

phostent = gethostbyname(name);

sa.sin_family = af_inet;

sa.sin_port = htons(6000);

memcpy(&sa.sin_addr.s_un.s_addr, phostent->h_addr_list[0], phostent->h_length);

bind(sock, (sockaddr *)&sa, sizeof(sa)); /*bind()设定自己主机的ip地址和端口号*/

if ((wsagetlasterror())==10013)

exit(1);

wsaioctl(sock, sio_rcvall, &optval, sizeof(optval), null, 0, &dwbytesret, null, null);

pipheader = (struct ipheader *)recvbuf;

ptcpheader = (struct tcpheader *)(recvbuf+ sizeof(struct ipheader ));

pudpheader = (struct udphdr *) (recvbuf+ sizeof(struct ipheader ));

while (1){

memset(recvbuf, 0, sizeof(recvbuf));

recv(sock, recvbuf, sizeof(recvbuf), 0);

sasource.sin_addr.s_addr = pipheader->ip_src;

strncpy(szsourceip, inet_ntoa(sasource.sin_addr), max_addr_len);

sadest.sin_addr.s_addr = pipheader->ip_dst;

strncpy(szdestip, inet_ntoa(sadest.sin_addr), max_addr_len);

lentcp =(ntohs(pipheader->ip_len)-(sizeof(struct ipheader)+sizeof(struct tcpheader)));

lenudp =(ntohs(pipheader->ip_len)-(sizeof(struct ipheader)+sizeof(struct udphdr)));

if((pipheader->ip_p)==ipproto_tcp&&lentcp!=0){

printf("*******************************************\n");

pcount++;

datatcp=(unsigned char *) recvbuf+sizeof(struct ipheader)+sizeof(struct tcpheader);

printf("-tcp-\n");

printf("\n目的ip地址：%s\n",szdestip);

printf("\n目的端口：%i\n",ntohs(ptcpheader->dport));

printf("datatcp address->%x\n",datatcp);

printf("size of ipheader->%i\n",sizeof(struct ipheader));

printf("size of tcpheader->%i\n",sizeof(struct tcpheader));

printf("size of the hole packet->%i\n",ntohs(pipheader->ip_len));

printf("\nchar packet%i [%i]=\"",pcount,lentcp-1);

for (i=0;i=20)

printf("%c",*(datatcp+i));

else

printf(".");

}

printf("\n\n*******************************************\n");

}

if((pipheader->ip_p)==ipproto_udp&&lentcp!=0){

pcount++;

dataudp=(unsigned char *) recvbuf+sizeof(struct ipheader)+sizeof(struct udphdr);

printf("-udp-\n");

printf("\n目的ip地址：%s\n",szdestip);

printf("\n目的端口：%d\n",ntohs(ptcpheader->dport));

printf("udp数据地址：%x\n",dataudp);

printf("ip头部长度：%i\n",sizeof(struct ipheader));

printf("udp头部长度：%i\n",sizeof(struct udphdr));

printf("包的大小：%i\n",ntohs(pipheader->ip_len));

printf("\nchar packet%i [%i]=\"",pcount,lenudp-1);

for (i=0;i=20)

printf("%c",*(dataudp+i));

else

printf(".");

}

printf("\n\n*******************************************\n");

}

}

}