//?ping.cpp?:?定義控制臺應用程序的入口點。
#include
#include
#include

#define?SEND_SIZE?32?
#define?PACKET_SIZE?4096
#define?ICMP_ECHO?8
#define?ICMP_ECHOREPLY?0

#pragma?comment（lib“Ws2_32.lib“）

struct?icmp
{
	unsigned?char?icmp_type;????//類型
	unsigned?char?icmp_code;????//編碼
	unsigned?short?icmp_chksum;?//校驗和
	unsigned?short?icmp_id;?????//標示符
	unsigned?short?icmp_seq;????//順序號
	unsigned?long?icmp_data;????//數據
};

struct?ip
{
	unsigned?char?ip_hl:4;???????//報頭長度
	unsigned?char?ip_v:4;????????//版本號
	unsigned?char?ip_tos;????????//服務類型
	unsigned?short?ip_len;???????//總長度
	unsigned?short?ip_id;????????//標識
	unsigned?short?ip_off;???????//標志
	unsigned?char?ip_ttl;????????//生存時間
	unsigned?char?ip_p;??????????//協議號
	unsigned?short?ip_sum;???????//報頭校驗和
	unsigned?long?ip_src;????????//源IP地址
	unsigned?long?ip_dst;????????//目的IP地址
};

char?sendpacket[PACKET_SIZE];
char?recvpacket[PACKET_SIZE];
struct?sockaddr_in?dest_addr;???
struct?sockaddr_in?from_addr;
int?sockfd;
int?pid;

unsigned?short?cal_chksum（unsigned?short?*addrint?len）;
int?pack（int?pack_no）;
int?unpack（unsigned?char?*bufint?len）;
void?send_packet（void）;
void?recv_packet（void）;

int?main（int?argc?CHAR*?argv[]）
{
	struct?hostent?*host;
	struct?protoent?*protocol;
	int?timeout=1000;
	int?SEND_COUNT=4;
	int?i;
	char?*par_host;
	char?m_Input[100];
	printf（“Input?IP:?“）;
	gets（m_Input）;
	par_host=m_Input;

	WORD?wVersionRequested;
	WSADATA?wsaData;
	int?err;
	wVersionRequested?=?MAKEWORD（?2?2?）;
	err?=?WSAStartup（?wVersionRequested?&wsaData?）;
	if?（?err?!=?0?）??return;
	if?（?LOBYTE（?wsaData.wVersion?）?!=?2?||
		HIBYTE（?wsaData.wVersion?）?!=?2?）?{
			WSACleanup（?）;
			return;?
	}?????????????????????????????????????????????????????????????????????

	if（?（protocol=getprotobyname（“icmp“）?）==NULL）????//返回對應于給定協議名的包含名字和協議號
	{?
		printf（“getprotobyname?error\n“）;???????????//的protoent結構指針
		exit（1）;
	}
	if（?（sockfd=socket（AF_INETSOCK_RAWprotocol->p_proto）?）<0）
	{???
		printf（“socket?error\n“）;
		exit（1）;
	}?????????????????????????????????????????????????????????????????????????

	if（setsockopt（sockfdSOL_SOCKETSO_RCVTIMEO（char*）&timeoutsizeof（timeout））<0）??//設置套接口的選項
		fprintf（stderr“failed?to?set?recv?timeout:?%d\n“WSAGetLastError（））;
	if（setsockopt（sockfdSOL_SOCKETSO_SNDTIMEO（char*）&timeoutsizeof（timeout））<0）
		fprintf（stderr“failed?to?set?send?timeout:?%d\n“WSAGetLastError（））;???????

	memset（&dest_addr0sizeof（dest_addr））;
	dest_addr.sin_family=AF_INET;?
	if（host=gethostbyname（par_host）?）????????//?返回對應于給定主機名的主機信息????????????????????????????
	{
	?????memcpy（?（char?*）&dest_addr.sin_addrhost->h_addrhost->h_length）;
		//resolve?address?to?hostname
		if（host=gethostbyaddr（host->h_addr4PF_INET））??????????????????????
			par_host=host->h_name;??????????
	}
	else?if（?dest_addr.sin_addr.s_addr=inet_addr（par_host）==INADDR_NONE）
	{
		printf（“Unkown?host?%s\n“par

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????196695??2009-12-30?10:51??Ping\Debug\Ping.exe

?????文件?????209128??2009-12-30?10:51??Ping\Debug\Ping.ilk

?????文件??????21349??2009-12-30?10:51??Ping\Debug\Ping.obj

?????文件????3644536??2009-12-30?10:51??Ping\Debug\Ping.pch

?????文件?????377856??2009-12-30?10:51??Ping\Debug\Ping.pdb

?????文件?????148480??2009-12-30?10:51??Ping\Debug\vc60.idb

?????文件??????77824??2009-12-30?10:51??Ping\Debug\vc60.pdb

?????文件???????5627??2009-12-30?10:51??Ping\Ping.cpp

?????文件???????3377??2009-12-30?10:51??Ping\Ping.dsp

?????文件????????516??2009-12-30?10:51??Ping\Ping.dsw

?????文件??????33792??2009-12-30?10:51??Ping\Ping.ncb

?????文件??????48640??2009-12-30?10:51??Ping\Ping.opt

?????文件????????736??2009-12-30?10:51??Ping\Ping.plg

?????文件?????275968??2009-12-31?20:25??Ping\報告.doc

?????目錄??????????0??2009-12-30?10:51??Ping\Debug

?????目錄??????????0??2009-12-31?20:33??Ping

-----------?---------??----------?-----??----

??????????????5044524????????????????????16