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Description: 本书第二部分讲述的是在Wi n 3 2平台上的Wi n s o c k编程。对于众多的基层网络协议，
Wi n s o c k是访问它们的首选接口。而且在每个Wi n 3 2平台上，Wi n s o c k都以不同的形式存在着。
Wi n s o c k是网络编程接口，而不是协议。它从U n i x平台的B e r k e l e y（B S D）套接字方案借鉴了
许多东西，后者能访问多种网络协议。在Wi n 3 2环境中，Wi n s o c k接口最终成为一个真正的
“与协议无关”接口，尤其是在Winsock 2发布之后。-book on the second part of the Wi n 3 2 on the platform's Wi n o c k programming. To many of the grass-roots network protocol, Wi n s o c k is to visit their preferred interface. But in each Wi n 3 2 platform, Wi n o c k's in different forms exist. Wi n s o c k network programming interface, rather than agreement. From U n i x platform B e r k e l e y (S B D) socket program draws many things, The latter would be able to visit a variety of network protocols. In Wi n 3 2 environment, Wi n o c k s interface will eventually become a real "agreement has nothing to do with the" interface, especially in the Winsock 2 was released.
Platform: |
Size: 362079 |
Author: 楼洛阳 |
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Description: 利用“原始套接字”（Raw Socket），我们可访问位于基层的传输协议。本章专门讲解如
何运用这种原始套接字，来模拟I P的一些实用工具，比如Tr a c e r o u t e和P i n g程序等等。使用原
始套接字，亦可对I P头信息进行实际的操作。本章只关心I P协议；至于如何针对其他协议使
用原始套接字，我们不打算提及。而且，大多数协议（除AT M以外）根本就不支持原始套接
字。所有原始套接字都是使用S O C K _ R AW这个套接字类型来创建的，而且目前只有Wi n s o c k
2提供了对它的支持。因此，无论Microsoft Windows CE 还是老版本的Windows 95 （无
Winsock 2升级）均不能利用原始套接字的能力。-use "raw socket" (Raw Socket), we can visit at the grassroots transmission agreements. This chapter specifically on how to use the original socket, I P to simulate some practical tools, For example Tr a c e r t o u e and P i n g procedures, and so on. Original socket, I can right the first P information of the actual operation. I only care about this chapter P Agreement; As to how the other agreements original socket, we do not intend to mention. Moreover, most agreements (except outside AT M) simply does not support the original socket. All original socket are using S O C K R AW _ the socket types to create, but it's only Wi n o c k 2 of the support it. Therefore, Whether Microsoft Windows CE or an older version of Windows 95 (non-Win sock escalation 2) are not using the ori
Platform: |
Size: 692344 |
Author: 楼洛阳 |
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Description: Windows Sockets规范以U.C. Berkeley大学BSD UNIX中流行的Socket接口为范例定义了一套Micosoft Windows下网络编程接口。它不仅包含了人们所熟悉的Berkeley Socket风格的库函数；也包含了一组针对Windows的扩展库函数，以使程序员能充分地利用Windows消息驱动机制进行编程。
Platform: |
Size: 302250 |
Author: 李晓明 |
Hits:
Description: 一个判断远程主机存活程序代码(ping)
#include
#include
#include
#include
#include "winsock.h"
#pragma comment(lib,"Ws2_32");
#define SEND_SIZE 32
#define PACKET_SIZE 4096
#define ICMP_ECHO 8
#define ICMP_ECHOREPLY 0
struct icmp
{
unsigned char icmp_type;
unsigned char icmp_code;
unsigned short icmp_cksum;
unsigned short icmp_id;
unsigned short icmp_seq;
unsigned long icmp_data;
};
struct ip
{
unsigned char ip_hl:4;
unsigned char ip_v:4;
unsigned char ip_tos;
unsigned short ip_len;
unsigned short ip_id;
unsigned short ip_off;
unsigned char ip_ttl;
unsigned char ip_p;
unsigned short ip_sum;
unsigned long ip_src;
unsigned long ip_dst;
};
unsigned char sendpacket[PACKET_SIZE];
unsigned char recvpacket[PACKET_SIZE];
struct sockaddr_in dest_addr;
struct sockaddr_in from_addr;
int sockfd;
int pid;
unsigned short cal_chksum(unsigned short *addr,int len);
int pack(int pack_no);
int unpack(unsigned char *buf,int len);
void send_packet(void);
void recv_packet(void);
void main(int argc,char *argv[])
{
struct hostent *host;
struct protoent *protocol;
WSADATA wsaData;
int timeout=1000;
int SEND_COUNT=4;
int i;
char *par_host;
par_host=argv[argc-1]; //IP赋值
switch(argc)
{
case 2: break;
case 3: if(strcmp(argv[1],"-t")==0)
{
SEND_COUNT=10000;
break;
}
//fall through
default:
printf("usage: %s [-t] Host name or IP address\n",argv[0]);
exit(1);
}
if(WSAStartup(0x1010,&wsaData)!=0)
{
printf("wsastartup error\n");
exit(1);
}
if( (protocol=getprotobyname("icmp") )==NULL)
{
printf("getprotobyname error\n");
exit(1);
}
/*
printf("%s\n",protocol->p_name);
printf("%s\n",protocol->p_aliases);
printf("%d\n",protocol->p_proto);
system("pause");
*/
if( (sockfd=socket(AF_INET,SOCK_RAW,protocol->p_proto) )<0)
{
printf("socket error\n");
exit(1);
}
if(setsockopt(sockfd,SOL_SOCKET,SO_RCVTIMEO,(char*)&timeout,sizeof(timeout))h_length);
//resolve address to hostname
if(host=gethostbyaddr(host->h_addr,4,PF_INET))
par_host=host->h_name;
//
//printf("%s\n",par_host);
//
}
else if( dest_addr.sin_addr.s_addr=inet_addr(par_host)==INADDR_NONE)
{
printf("Unkown host %s\n",par_host);
exit(1);
}
pid=getpid();
/*
printf("%d\n",pid);
system("pause");
*/
printf("Pinging %s [%s]: with %d bytes of data:\n\n",par_host,inet_ntoa(dest_addr.sin_addr),SEND_SIZE);
for(i=0;i1)
{ sum+=*w++;
nleft-=2;
}
if( nleft==1)
{ *(unsigned char *)(&answer)=*(unsigned char *)w;
sum+=answer;
}
sum=(sum>>16)+(sum&0xffff);
sum+=(sum>>16);
answer=~sum;
return answer;
}
//打包
int pack(int pack_no)
{
int packsize;
struct icmp *icmp;
packsize=8+SEND_SIZE;
icmp=(struct icmp*)sendpacket;
icmp->icmp_type=ICMP_ECHO;
icmp->icmp_code=0;
icmp->icmp_cksum=0;
icmp->icmp_seq=pack_no;
icmp->icmp_id=pid;
icmp->icmp_data=GetTickCount();
icmp->icmp_cksum=cal_chksum( (unsigned short *)icmp,packsize); /*校验算法*/
return packsize;
}
//解包
int unpack(unsigned char *buf,int len)
{
struct ip *ip;
struct icmp *icmp;
double rtt;
int iphdrlen;
ip=(struct ip *)buf;
iphdrlen=ip->ip_hl*4;
icmp=(struct icmp *)(buf+iphdrlen);
if( (icmp->icmp_type==ICMP_ECHOREPLY) && (icmp->icmp_id==pid) )
{
len=len-iphdrlen-8;
rtt=GetTickCount()-icmp->icmp_data;
printf("Reply from %s: bytes=%d time=%.0fms TTL=%d icmp_seq=%u\n",
inet_ntoa(from_addr.sin_addr),
len,
rtt,
ip->ip_ttl,
icmp->icmp_seq);
return 1;
}
return 0;
}
//发送
void send_packet()
{
int packetsize;
static int pack_no=0;
packetsize=pack(pack_no++);
if( sendto(sockfd,(char *)sendpacket,packetsize,0,(struct sockaddr *)&dest_addr,sizeof(dest_addr) )=0)
success=unpack(recvpacket,n);
else if (WSAGetLastError() == WSAETIMEDOUT)
{
printf("Request timed out.\n");
return;
}
}while(!success);
}
UID5380 帖子239 精华0 积分1289 阅读权限40 来自软件学院 在线时间81 小时 注册时间2006-5-22 最后登录2007-2-24 查看详细资料
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Description: 本书第二部分讲述的是在Wi n 3 2平台上的Wi n s o c k编程。对于众多的基层网络协议，
Wi n s o c k是访问它们的首选接口。而且在每个Wi n 3 2平台上，Wi n s o c k都以不同的形式存在着。
Wi n s o c k是网络编程接口，而不是协议。它从U n i x平台的B e r k e l e y（B S D）套接字方案借鉴了
许多东西，后者能访问多种网络协议。在Wi n 3 2环境中，Wi n s o c k接口最终成为一个真正的
“与协议无关”接口，尤其是在Winsock 2发布之后。-book on the second part of the Wi n 3 2 on the platform's Wi n o c k programming. To many of the grass-roots network protocol, Wi n s o c k is to visit their preferred interface. But in each Wi n 3 2 platform, Wi n o c k's in different forms exist. Wi n s o c k network programming interface, rather than agreement. From U n i x platform B e r k e l e y (S B D) socket program draws many things, The latter would be able to visit a variety of network protocols. In Wi n 3 2 environment, Wi n o c k s interface will eventually become a real "agreement has nothing to do with the" interface, especially in the Winsock 2 was released.
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