/*?P2P?程序客戶端
?*?
?*?文件名：P2PClient.c
?*
?*?日期：2004-5-21
?*
?*?作者：shootingstars（zhouhuis22@sina.com）
?*
?*/

#pragma?comment（lib“ws2_32.lib“）

#include?“windows.h“
#include?“..\proto.h“
#include?“..\Exception.h“
#include?
using?namespace?std;

UserList?ClientList;



#define?COMMANDMAXC?256
#define?MAXRETRY????5

SOCKET?PrimaryUDP;
char?UserName[10];
char?ServerIP[20];

bool?RecvedACK;

void?InitWinSock（）
{
	WSADATA?wsaData;

	if?（WSAStartup（MAKEWORD（2?2）?&wsaData）?!=?0）
	{
		printf（“Windows?sockets?2.2?startup“）;
		throw?Exception（““）;
	}
	else{
		printf（“Using?%s?（Status:?%s）\n“
			wsaData.szDescription?wsaData.szSystemStatus）;
		printf（“with?API?versions?%d.%d?to?%d.%d\n\n“
			LOBYTE（wsaData.wVersion）?HIBYTE（wsaData.wVersion）
			LOBYTE（wsaData.wHighVersion）?HIBYTE（wsaData.wHighVersion））;
	}
}

SOCKET?mksock（int?type）
{
	SOCKET?sock?=?socket（AF_INET?type?0）;
	if?（sock?	{
????????printf（“create?socket?error“）;
		throw?Exception（““）;
	}
	return?sock;
}

stUserListNode?GetUser（char?*username）
{
	for（UserList::iterator?UserIterator=ClientList.begin（）;
						UserIterator!=ClientList.end（）;
							++UserIterator）
	{
		if（?strcmp（?（（*UserIterator）->userName）?username）?==?0?）
			return?*（*UserIterator）;
	}
	throw?Exception（“not?find?this?user“）;
}

void?BindSock（SOCKET?sock）
{
	sockaddr_in?sin;
	sin.sin_addr.S_un.S_addr?=?INADDR_ANY;
	sin.sin_family?=?AF_INET;
	sin.sin_port?=?0;
	
	if?（bind（sock?（struct?sockaddr*）&sin?sizeof（sin））?		throw?Exception（“bind?error“）;
}

void?ConnectToServer（SOCKET?sockchar?*username?char?*serverip）
{
	sockaddr_in?remote;
	remote.sin_addr.S_un.S_addr?=?inet_addr（serverip）;
	remote.sin_family?=?AF_INET;
	remote.sin_port?=?htons（SERVER_PORT）;
	
	stMessage?sendbuf;
	sendbuf.iMessageType?=?LOGIN;
	strncpy（sendbuf.message.loginmember.userName?username?10）;

	sendto（sock?（const?char*）&sendbuf?sizeof（sendbuf）?0?（const?sockaddr*）&remotesizeof（remote））;

	int?usercount;
	int?fromlen?=?sizeof（remote）;
	int?iread?=?recvfrom（sock?（char?*）&usercount?sizeof（int）?0?（sockaddr?*）&remote?&fromlen）;
	if（iread<=0）
	{
		throw?Exception（“Login?error\n“）;
	}

	//?登錄到服務端后，接收服務端發來的已經登錄的用戶的信息
	cout<<“Have?“<	for（int?i?=?0;i	{
		stUserListNode?*node?=?new?stUserListNode;
		recvfrom（sock?（char*）node?sizeof（stUserListNode）?0?（sockaddr?*）&remote?&fromlen）;
		ClientList.push_back（node）;
		cout<<“Username:“<userName<		in_addr?tmp;
		tmp.S_un.S_addr?=?htonl（node->ip）;
		cout<<“UserIP:“<		cout<<“UserPort:“<port<		cout<<““<	}
}

void?OutputUsage（）
{
	cout<<“You?can?input?you?command:\n“
		<<“Command?Type:\“send\“\“exit\“\“getu\“\n“
		<<“Example?:?send?Username?Message\n“
		<<“??????????exit\n“
		<<“??????????getu\n“
		<}

/*?這是主要的函數：發送一個消息給某個用戶（C）
?*流程：直接

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

?????文件????????498??2004-05-21?21:58??P2P_by_shootingstars\P2P\Exception.h

?????文件???????9841??2004-05-21?22:54??P2P_by_shootingstars\P2P\P2PClient\P2PClient.cpp

?????文件???????4324??2004-05-21?22:55??P2P_by_shootingstars\P2P\P2PClient\P2PClient.dsp

?????文件????????541??2004-05-21?21:55??P2P_by_shootingstars\P2P\P2PClient\P2PClient.dsw

?????文件??????19456??2004-05-22?09:24??P2P_by_shootingstars\P2P\P2PClient\P2PClient.ncb

?????文件??????48640??2004-05-21?22:55??P2P_by_shootingstars\P2P\P2PClient\P2PClient.opt

?????文件????????252??2004-05-21?22:55??P2P_by_shootingstars\P2P\P2PClient\P2PClient.plg

?????文件????????907??2004-05-22?08:47??P2P_by_shootingstars\P2P\P2PClient\P2PClient.sln

????..A..H.??????8192??2004-05-22?09:24??P2P_by_shootingstars\P2P\P2PClient\P2PClient.suo

?????文件???????4361??2004-05-22?08:47??P2P_by_shootingstars\P2P\P2PClient\P2PClient.vcproj

?????目錄??????????0??2004-05-22?11:15??P2P_by_shootingstars\P2P\P2PClient

?????文件???????5364??2004-05-21?22:48??P2P_by_shootingstars\P2P\P2PServer\P2PServer.cpp

?????文件???????4320??2004-05-21?22:55??P2P_by_shootingstars\P2P\P2PServer\P2PServer.dsp

?????文件????????541??2004-05-21?21:51??P2P_by_shootingstars\P2P\P2PServer\P2PServer.dsw

?????文件??????19456??2004-05-22?09:24??P2P_by_shootingstars\P2P\P2PServer\P2PServer.ncb

?????文件??????48640??2004-05-21?22:55??P2P_by_shootingstars\P2P\P2PServer\P2PServer.opt

?????文件????????252??2004-05-21?22:55??P2P_by_shootingstars\P2P\P2PServer\P2PServer.plg

?????文件????????907??2004-05-22?08:47??P2P_by_shootingstars\P2P\P2PServer\P2PServer.sln

????..A..H.??????8192??2004-05-22?09:24??P2P_by_shootingstars\P2P\P2PServer\P2PServer.suo

?????文件???????4305??2004-05-22?08:47??P2P_by_shootingstars\P2P\P2PServer\P2PServer.vcproj

?????目錄??????????0??2004-05-22?10:57??P2P_by_shootingstars\P2P\P2PServer

?????文件???????1725??2004-05-21?22:35??P2P_by_shootingstars\P2P\proto.h

?????文件?????????93??2004-05-25?09:35??P2P_by_shootingstars\P2P\readme.txt

?????文件???????8733??2004-05-22?11:16??P2P_by_shootingstars\P2P\UDP穿越NAT.TXT

?????目錄??????????0??2004-05-25?09:34??P2P_by_shootingstars\P2P

?????目錄??????????0??2004-05-25?09:32??P2P_by_shootingstars

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

???????????????199540????????????????????26