diff --git a/client.cpp b/client.cpp
new file mode 100644
index 0000000..5aca2cd
--- /dev/null
+++ b/client.cpp
@@ -0,0 +1,865 @@
+#include "common.h"
+#include "network.h"
+#include "connection.h"
+#include "misc.h"
+#include "log.h"
+#include "lib/md5.h"
+#include "encrypt.h"
+#include "fd_manager.h"
+
+
+int client_on_timer(conn_info_t &conn_info) //for client. called when a timer is ready in epoll
+{
+	//keep_iptables_rule();
+	packet_info_t &send_info=conn_info.raw_info.send_info;
+	packet_info_t &recv_info=conn_info.raw_info.recv_info;
+	raw_info_t &raw_info=conn_info.raw_info;
+	conn_info.blob->conv_manager.c.clear_inactive();
+	mylog(log_trace,"timer!\n");
+
+	mylog(log_trace,"roller my %d,oppsite %d,%lld\n",int(conn_info.my_roller),int(conn_info.oppsite_roller),conn_info.last_oppsite_roller_time);
+
+	mylog(log_trace,"<client_on_timer,send_info.ts_ack= %u>\n",send_info.ts_ack);
+
+	if(raw_info.disabled)
+	{
+		conn_info.state.client_current_state=client_idle;
+		conn_info.my_id=get_true_random_number_nz();
+
+		mylog(log_info,"state back to client_idle\n");
+	}
+
+	if(conn_info.state.client_current_state==client_idle)
+	{
+		raw_info.rst_received=0;
+		raw_info.disabled=0;
+
+		fail_time_counter++;
+		if(max_fail_time>0&&fail_time_counter>max_fail_time)
+		{
+			mylog(log_fatal,"max_fail_time exceed\n");
+			myexit(-1);
+		}
+
+		conn_info.blob->anti_replay.re_init();
+		conn_info.my_id = get_true_random_number_nz(); ///todo no need to do this everytime
+
+
+
+		address_t tmp_addr;
+		//u32_t new_ip=0;
+		if(!force_source_ip)
+		{
+			if(get_src_adress2(tmp_addr,remote_addr)!=0)
+			{
+				mylog(log_warn,"get_src_adress() failed\n");
+				return -1;
+			}
+			//source_addr=new_addr;
+			//source_addr.set_port(0);
+
+			mylog(log_info,"source_addr is now %s\n",tmp_addr.get_ip());
+
+			/*
+			if(new_ip!=source_ip_uint32)
+			{
+				mylog(log_info,"source ip changed from %s to ",my_ntoa(source_ip_uint32));
+				log_bare(log_info,"%s\n",my_ntoa(new_ip));
+				source_ip_uint32=new_ip;
+				send_info.src_ip=new_ip;
+			}*/
+
+		}
+		else
+		{
+			tmp_addr=source_addr;
+		}
+
+		send_info.new_src_ip.from_address_t(tmp_addr);
+
+		if (force_source_port == 0)
+		{
+			send_info.src_port = client_bind_to_a_new_port2(bind_fd,tmp_addr);
+		}
+		else
+		{
+			send_info.src_port = source_port;
+		}
+
+		if (raw_mode == mode_icmp)
+		{
+			send_info.dst_port = send_info.src_port;
+		}
+
+		mylog(log_info, "using port %d\n", send_info.src_port);
+		init_filter(send_info.src_port);
+
+		if(raw_mode==mode_icmp||raw_mode==mode_udp)
+		{
+			conn_info.state.client_current_state=client_handshake1;
+
+			mylog(log_info,"state changed from client_idle to client_pre_handshake\n");
+		}
+		if(raw_mode==mode_faketcp)
+		{
+			conn_info.state.client_current_state=client_tcp_handshake;
+			mylog(log_info,"state changed from client_idle to client_tcp_handshake\n");
+
+		}
+		conn_info.last_state_time=get_current_time();
+		conn_info.last_hb_sent_time=0;
+		//dont return;
+	}
+	if(conn_info.state.client_current_state==client_tcp_handshake)  //send and resend syn
+	{
+		assert(raw_mode==mode_faketcp);
+		if (get_current_time() - conn_info.last_state_time > client_handshake_timeout)
+		{
+			conn_info.state.client_current_state = client_idle;
+			mylog(log_info, "state back to client_idle from client_tcp_handshake\n");
+			return 0;
+
+		}
+		else if (get_current_time() - conn_info.last_hb_sent_time > client_retry_interval)
+		{
+
+			if (raw_mode == mode_faketcp)
+			{
+				if (conn_info.last_hb_sent_time == 0)
+				{
+					send_info.psh = 0;
+					send_info.syn = 1;
+					send_info.ack = 0;
+					send_info.ts_ack =0;
+					send_info.seq=get_true_random_number();
+					send_info.ack_seq=get_true_random_number();
+				}
+			}
+
+			send_raw0(raw_info, 0, 0);
+
+			conn_info.last_hb_sent_time = get_current_time();
+			mylog(log_info, "(re)sent tcp syn\n");
+			return 0;
+		}
+		else
+		{
+			return 0;
+		}
+		return 0;
+	}
+	else if(conn_info.state.client_current_state==client_handshake1)//send and resend handshake1
+	{
+		if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
+		{
+			conn_info.state.client_current_state=client_idle;
+			mylog(log_info,"state back to client_idle from client_handshake1\n");
+			return 0;
+
+		}
+		else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
+		{
+
+			if(raw_mode==mode_faketcp)
+			{
+				if(conn_info.last_hb_sent_time==0)
+				{
+					send_info.seq++;
+					send_info.ack_seq=recv_info.seq+1;
+					send_info.ts_ack=recv_info.ts;
+					raw_info.reserved_send_seq=send_info.seq;
+				}
+				send_info.seq=raw_info.reserved_send_seq;
+				send_info.psh = 0;
+				send_info.syn = 0;
+				send_info.ack = 1;
+				send_raw0(raw_info, 0, 0);
+
+				send_handshake(raw_info,conn_info.my_id,0,const_id);
+
+				send_info.seq+=raw_info.send_info.data_len;
+			}
+			else
+			{
+
+				send_handshake(raw_info,conn_info.my_id,0,const_id);
+				if(raw_mode==mode_icmp)
+					send_info.my_icmp_seq++;
+			}
+
+			conn_info.last_hb_sent_time=get_current_time();
+			mylog(log_info,"(re)sent handshake1\n");
+			return 0;
+		}
+		else
+		{
+			return 0;
+		}
+		return 0;
+	}
+	else if(conn_info.state.client_current_state==client_handshake2)
+	{
+		if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
+		{
+			conn_info.state.client_current_state=client_idle;
+			mylog(log_info,"state back to client_idle from client_handshake2\n");
+			return 0;
+		}
+		else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
+		{
+			if(raw_mode==mode_faketcp)
+			{
+				if(conn_info.last_hb_sent_time==0)
+				{
+					send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
+					send_info.ts_ack=recv_info.ts;
+					raw_info.reserved_send_seq=send_info.seq;
+				}
+				send_info.seq=raw_info.reserved_send_seq;
+				send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
+				send_info.seq+=raw_info.send_info.data_len;
+
+			}
+			else
+			{
+
+				send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
+				if(raw_mode==mode_icmp)
+					send_info.my_icmp_seq++;
+			}
+			conn_info.last_hb_sent_time=get_current_time();
+			mylog(log_info,"(re)sent handshake2\n");
+			return 0;
+
+		}
+		else
+		{
+			return 0;
+		}
+		return 0;
+	}
+	else if(conn_info.state.client_current_state==client_ready)
+	{
+		fail_time_counter=0;
+		mylog(log_trace,"time %llu,%llu\n",get_current_time(),conn_info.last_state_time);
+
+		if(get_current_time()-conn_info.last_hb_recv_time>client_conn_timeout)
+		{
+			conn_info.state.client_current_state=client_idle;
+			conn_info.my_id=get_true_random_number_nz();
+			mylog(log_info,"state back to client_idle from  client_ready bc of server-->client direction timeout\n");
+			return 0;
+		}
+
+		if(get_current_time()- conn_info.last_oppsite_roller_time>client_conn_uplink_timeout)
+		{
+			conn_info.state.client_current_state=client_idle;
+			conn_info.my_id=get_true_random_number_nz();
+			mylog(log_info,"state back to client_idle from  client_ready bc of client-->server direction timeout\n");
+		}
+
+
+		if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
+		{
+			return 0;
+		}
+
+
+
+		mylog(log_debug,"heartbeat sent <%x,%x>\n",conn_info.oppsite_id,conn_info.my_id);
+
+		if(hb_mode==0)
+			send_safer(conn_info,'h',hb_buf,0);/////////////send
+		else
+			send_safer(conn_info,'h',hb_buf,hb_len);
+		conn_info.last_hb_sent_time=get_current_time();
+		return 0;
+	}
+	else
+	{
+		mylog(log_fatal,"unknown state,this shouldnt happen.\n");
+		myexit(-1);
+	}
+	return 0;
+}
+int client_on_raw_recv(conn_info_t &conn_info) //called when raw fd received a packet.
+{
+	char* data;int data_len;
+	packet_info_t &send_info=conn_info.raw_info.send_info;
+	packet_info_t &recv_info=conn_info.raw_info.recv_info;
+
+	raw_info_t &raw_info=conn_info.raw_info;
+
+	mylog(log_trace,"<client_on_raw_recv,send_info.ts_ack= %u>\n",send_info.ts_ack);
+	if(pre_recv_raw_packet()<0) return -1;
+
+	if(conn_info.state.client_current_state==client_idle )
+	{
+
+		discard_raw_packet();
+		//recv(raw_recv_fd, 0,0, 0  );
+	}
+	else if(conn_info.state.client_current_state==client_tcp_handshake)//received syn ack
+	{
+		assert(raw_mode==mode_faketcp);
+		if(recv_raw0(raw_info,data,data_len)<0)
+		{
+			return -1;
+		}
+		if(!recv_info.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
+		{
+			mylog(log_debug,"unexpected adress %s %s %d %d\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
+			return -1;
+		}
+		if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==1)
+		{
+			if(recv_info.ack_seq!=send_info.seq+1)
+			{
+				mylog(log_debug,"seq ack_seq mis match\n");
+							return -1;
+			}
+
+			conn_info.state.client_current_state = client_handshake1;
+			mylog(log_info,"state changed from client_tcp_handshake to client_handshake1\n");
+			conn_info.last_state_time = get_current_time();
+			conn_info.last_hb_sent_time=0;
+			client_on_timer(conn_info);
+			return 0;
+		}
+		else
+		{
+			mylog(log_debug,"unexpected packet type,expected:syn ack\n");
+			return -1;
+		}
+	}
+	else if(conn_info.state.client_current_state==client_handshake1)//recevied respond of handshake1
+	{
+		if(recv_bare(raw_info,data,data_len)!=0)
+		{
+			mylog(log_debug,"recv_bare failed!\n");
+			return -1;
+		}
+		if(!recv_info.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
+		{
+			mylog(log_debug,"unexpected adress %s %s %d %d\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
+			return -1;
+		}
+		if(data_len<int( 3*sizeof(my_id_t)))
+		{
+			mylog(log_debug,"too short to be a handshake\n");
+			return -1;
+		}
+		//id_t tmp_oppsite_id=  ntohl(* ((u32_t *)&data[0]));
+		my_id_t tmp_oppsite_id;
+		memcpy(&tmp_oppsite_id,&data[0],sizeof(tmp_oppsite_id));
+		tmp_oppsite_id=ntohl(tmp_oppsite_id);
+
+		//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
+		my_id_t tmp_my_id;
+		memcpy(&tmp_my_id,&data[sizeof(my_id_t)],sizeof(tmp_my_id));
+		tmp_my_id=ntohl(tmp_my_id);
+
+		//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
+		my_id_t tmp_oppsite_const_id;
+		memcpy(&tmp_oppsite_const_id,&data[sizeof(my_id_t)*2],sizeof(tmp_oppsite_const_id));
+		tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
+
+		if(tmp_my_id!=conn_info.my_id)
+		{
+			mylog(log_debug,"tmp_my_id doesnt match\n");
+			return -1;
+		}
+
+
+		if(raw_mode==mode_faketcp)
+		{
+			if(recv_info.ack_seq!=send_info.seq)
+			{
+				mylog(log_debug,"seq ack_seq mis match\n");
+							return -1;
+			}
+			if(recv_info.seq!=send_info.ack_seq)
+			{
+				mylog(log_debug,"seq ack_seq mis match\n");
+							return -1;
+			}
+		}
+		conn_info.oppsite_id=tmp_oppsite_id;
+
+		mylog(log_info,"changed state from to client_handshake1 to client_handshake2,my_id is %x,oppsite id is %x\n",conn_info.my_id,conn_info.oppsite_id);
+
+		//send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);  //////////////send
+		conn_info.state.client_current_state = client_handshake2;
+		conn_info.last_state_time = get_current_time();
+		conn_info.last_hb_sent_time=0;
+		client_on_timer(conn_info);
+
+		return 0;
+	}
+	else if(conn_info.state.client_current_state==client_handshake2||conn_info.state.client_current_state==client_ready)//received heartbeat or data
+	{
+		char type;
+		if(recv_safer(conn_info,type,data,data_len)!=0)
+		{
+			mylog(log_debug,"recv_safer failed!\n");
+			return -1;
+		}
+		if(!recv_info.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
+		{
+			mylog(log_warn,"unexpected adress %s %s %d %d,this shouldnt happen.\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
+			return -1;
+		}
+		if(conn_info.state.client_current_state==client_handshake2)
+		{
+			mylog(log_info,"changed state from to client_handshake2 to client_ready\n");
+			conn_info.state.client_current_state=client_ready;
+			conn_info.last_hb_sent_time=0;
+			conn_info.last_hb_recv_time=get_current_time();
+			conn_info.last_oppsite_roller_time=conn_info.last_hb_recv_time;
+			client_on_timer(conn_info);
+		}
+		if(data_len>=0&&type=='h')
+		{
+			mylog(log_debug,"[hb]heart beat received,oppsite_roller=%d\n",int(conn_info.oppsite_roller));
+			conn_info.last_hb_recv_time=get_current_time();
+			return 0;
+		}
+		else if(data_len>= int( sizeof(u32_t))&&type=='d')
+		{
+			mylog(log_trace,"received a data from fake tcp,len:%d\n",data_len);
+
+			if(hb_mode==0)
+				conn_info.last_hb_recv_time=get_current_time();
+
+			//u32_t tmp_conv_id= ntohl(* ((u32_t *)&data[0]));
+			u32_t tmp_conv_id;
+			memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
+			tmp_conv_id=ntohl(tmp_conv_id);
+
+			if(!conn_info.blob->conv_manager.c.is_conv_used(tmp_conv_id))
+			{
+				mylog(log_info,"unknow conv %d,ignore\n",tmp_conv_id);
+				return 0;
+			}
+
+			conn_info.blob->conv_manager.c.update_active_time(tmp_conv_id);
+
+			//u64_t u64=conn_info.blob->conv_manager.c.find_data_by_conv(tmp_conv_id);
+
+			address_t tmp_addr=conn_info.blob->conv_manager.c.find_data_by_conv(tmp_conv_id);
+
+			//sockaddr_in tmp_sockaddr={0};
+
+			//tmp_sockaddr.sin_family = AF_INET;
+			//tmp_sockaddr.sin_addr.s_addr=(u64>>32u);
+
+			//tmp_sockaddr.sin_port= htons(uint16_t((u64<<32u)>>32u));
+
+
+			int ret=sendto(udp_fd,data+sizeof(u32_t),data_len -(sizeof(u32_t)),0,(struct sockaddr *)&tmp_addr.inner,tmp_addr.get_len());
+
+			if(ret<0)
+			{
+		    	mylog(log_warn,"sento returned %d,%s,%02x,%s\n",ret,strerror(errno),int(tmp_addr.get_type()),tmp_addr.get_str());
+				//perror("ret<0");
+			}
+			//mylog(log_trace,"%s :%d\n",inet_ntoa(tmp_sockaddr.sin_addr),ntohs(tmp_sockaddr.sin_port));
+			mylog(log_trace,"%d byte sent\n",ret);
+		}
+		else
+		{
+			mylog(log_warn,"unknown packet,this shouldnt happen.\n");
+						return -1;
+		}
+
+		return 0;
+	}
+	else
+	{
+		mylog(log_fatal,"unknown state,this shouldnt happen.\n");
+		myexit(-1);
+	}
+	return 0;
+}
+int client_on_udp_recv(conn_info_t &conn_info)
+{
+	int recv_len;
+	char buf[buf_len];
+	address_t::storage_t udp_new_addr_in={0};
+	socklen_t udp_new_addr_len = sizeof(address_t::storage_t);
+	if ((recv_len = recvfrom(udp_fd, buf, max_data_len+1, 0,
+			(struct sockaddr *) &udp_new_addr_in, &udp_new_addr_len)) == -1) {
+		mylog(log_warn,"recv_from error,%s\n",strerror(errno));
+		//myexit(1);
+	};
+
+	if(recv_len==max_data_len+1)
+	{
+		mylog(log_warn,"huge packet, data_len > %d,dropped\n",max_data_len);
+		return -1;
+	}
+
+	if(recv_len>=mtu_warn)
+	{
+		mylog(log_warn,"huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ",recv_len,mtu_warn);
+	}
+	//mylog(log_trace,"Received packet from %s:%d,len: %d\n", inet_ntoa(udp_new_addr_in.sin_addr),
+		//	ntohs(udp_new_addr_in.sin_port),recv_len);
+
+	/*
+	if(udp_old_addr_in.sin_addr.s_addr==0&&udp_old_addr_in.sin_port==0)
+	{
+		memcpy(&udp_old_addr_in,&udp_new_addr_in,sizeof(udp_new_addr_in));
+	}
+	else if(udp_new_addr_in.sin_addr.s_addr!=udp_old_addr_in.sin_addr.s_addr
+			||udp_new_addr_in.sin_port!=udp_old_addr_in.sin_port)
+	{
+		if(get_current_time()- last_udp_recv_time <udp_timeout)
+		{
+			printf("new <ip,port> connected in,ignored,bc last connection is still active\n");
+			continue;
+		}
+		else
+		{
+			printf("new <ip,port> connected in,accpeted\n");
+			memcpy(&udp_old_addr_in,&udp_new_addr_in,sizeof(udp_new_addr_in));
+			conv_id++;
+		}
+	}*/
+
+	//last_udp_recv_time=get_current_time();
+	address_t tmp_addr;
+	tmp_addr.from_sockaddr((sockaddr *)&udp_new_addr_in,udp_new_addr_len);
+	//u64_t u64=((u64_t(udp_new_addr_in.sin_addr.s_addr))<<32u)+ntohs(udp_new_addr_in.sin_port);
+	u32_t conv;
+
+	//u64_t u64;//////todo
+	if(!conn_info.blob->conv_manager.c.is_data_used(tmp_addr))
+	{
+		if(conn_info.blob->conv_manager.c.get_size() >=max_conv_num)
+		{
+			mylog(log_warn,"ignored new udp connect bc max_conv_num exceed\n");
+			return -1;
+		}
+		conv=conn_info.blob->conv_manager.c.get_new_conv();
+		conn_info.blob->conv_manager.c.insert_conv(conv,tmp_addr);
+		mylog(log_info,"new packet from %s,conv_id=%x\n",tmp_addr.get_str(),conv);
+	}
+	else
+	{
+		conv=conn_info.blob->conv_manager.c.find_conv_by_data(tmp_addr);
+	}
+
+	conn_info.blob->conv_manager.c.update_active_time(conv);
+
+	if(conn_info.state.client_current_state==client_ready)
+	{
+		/*
+		char buf2[6000];
+		int ret1=send_raw(conn_info.raw_info,buf2,40);
+		int ret2=send_raw(conn_info.raw_info,buf2,500);
+		int ret3=send_raw(conn_info.raw_info,buf2,1000);
+		int ret4=send_raw(conn_info.raw_info,buf2,2000);
+		mylog(log_warn,"ret= %d %d %d %d\n",ret1,ret2,ret3,ret4);*/
+
+		send_data_safer(conn_info,buf,recv_len,conv);
+	}
+	return 0;
+}
+
+int client_event_loop()
+{
+
+
+	char buf[buf_len];
+
+	conn_info_t conn_info;
+	conn_info.my_id=get_true_random_number_nz();
+
+	conn_info.prepare();
+	packet_info_t &send_info=conn_info.raw_info.send_info;
+	packet_info_t &recv_info=conn_info.raw_info.recv_info;
+
+	if(lower_level)
+	{
+		if(lower_level_manual)
+		{
+			int index;
+			init_ifindex(if_name,raw_send_fd,index);
+			//init_ifindex(if_name);
+			memset(&send_info.addr_ll, 0, sizeof(send_info.addr_ll));
+			send_info.addr_ll.sll_family = AF_PACKET;
+			send_info.addr_ll.sll_ifindex =index;
+			send_info.addr_ll.sll_halen = ETHER_ADDR_LEN;
+			send_info.addr_ll.sll_protocol = htons(ETH_P_IP);
+			memcpy(&send_info.addr_ll.sll_addr, dest_hw_addr, ETHER_ADDR_LEN);
+			mylog(log_info,"we are running at lower-level (manual) mode\n");
+		}
+		else
+		{
+			u32_t dest_ip;
+			string if_name_string;
+			string hw_string;
+			assert(remote_addr.get_type()==AF_INET);
+
+			if(retry_on_error==0)
+			{
+				if(find_lower_level_info(remote_addr.inner.ipv4.sin_addr.s_addr,dest_ip,if_name_string,hw_string)!=0)
+				{
+					mylog(log_fatal,"auto detect lower-level info failed for %s,specific it manually\n",remote_addr.get_ip());
+					myexit(-1);
+				}
+			}
+			else
+			{
+				int ok=0;
+				while(!ok)
+				{
+					if(find_lower_level_info(remote_addr.inner.ipv4.sin_addr.s_addr,dest_ip,if_name_string,hw_string)!=0)
+					{
+						mylog(log_warn,"auto detect lower-level info failed for %s,retry in %d seconds\n",remote_addr.get_ip(),retry_on_error_interval);
+						sleep(retry_on_error_interval);
+					}
+					else
+					{
+						ok=1;
+					}
+
+				}
+			}
+			mylog(log_info,"we are running at lower-level (auto) mode,%s %s %s\n",my_ntoa(dest_ip),if_name_string.c_str(),hw_string.c_str());
+
+			u32_t hw[6];
+			memset(hw, 0, sizeof(hw));
+			sscanf(hw_string.c_str(), "%x:%x:%x:%x:%x:%x",&hw[0], &hw[1], &hw[2],
+					&hw[3], &hw[4], &hw[5]);
+
+			mylog(log_warn,
+					"make sure this is correct:   if_name=<%s>  dest_mac_adress=<%02x:%02x:%02x:%02x:%02x:%02x>  \n",
+					if_name_string.c_str(), hw[0], hw[1], hw[2], hw[3], hw[4], hw[5]);
+			for (int i = 0; i < 6; i++) {
+				dest_hw_addr[i] = uint8_t(hw[i]);
+			}
+
+			//mylog(log_fatal,"--lower-level auto for client hasnt been implemented\n");
+			int index;
+			init_ifindex(if_name_string.c_str(),raw_send_fd,index);
+
+			memset(&send_info.addr_ll, 0, sizeof(send_info.addr_ll));
+			send_info.addr_ll.sll_family = AF_PACKET;
+			send_info.addr_ll.sll_ifindex = index;
+			send_info.addr_ll.sll_halen = ETHER_ADDR_LEN;
+			send_info.addr_ll.sll_protocol = htons(ETH_P_IP);
+			memcpy(&send_info.addr_ll.sll_addr, dest_hw_addr, ETHER_ADDR_LEN);
+			//mylog(log_info,"we are running at lower-level (manual) mode\n");
+		}
+
+	}
+
+	/*
+
+	address_t new_addr;
+
+	if(!force_source_ip)
+	{
+		mylog(log_info,"get_src_adress called\n");
+		if(retry_on_error==0)
+		{
+			if(get_src_adress2(new_addr,remote_addr)!=0)
+			{
+				mylog(log_fatal,"the trick to auto get source ip failed, maybe you dont have internet access\n");
+				myexit(-1);
+			}
+		}
+		else
+		{
+			int ok=0;
+			while(!ok)
+			{
+				if(get_src_adress2(new_addr,remote_addr)!=0)
+				{
+					mylog(log_warn,"the trick to auto get source ip failed, maybe you dont have internet access, retry in %d seconds\n",retry_on_error_interval);
+					sleep(retry_on_error_interval);
+				}
+				else
+				{
+					ok=1;
+				}
+
+			}
+		}
+
+	}
+	else
+	{
+		new_addr=source_addr;
+	}
+	//in_addr tmp;
+	//tmp.s_addr=source_ip_uint32;
+	mylog(log_info,"source ip = %s\n",new_addr.get_ip());*/
+	//printf("done\n");
+
+
+	/*
+	if(try_to_list_and_bind(bind_fd,local_ip_uint32,source_port)!=0)
+	{
+		mylog(log_fatal,"bind to source_port:%d fail\n ",source_port);
+		myexit(-1);
+	}*/
+	send_info.src_port=0;
+	memset(&send_info.new_src_ip,0,sizeof(send_info.new_src_ip));
+
+	int i, j, k;int ret;
+
+
+	//init_filter(source_port);
+
+	send_info.new_dst_ip.from_address_t(remote_addr);
+
+	send_info.dst_port=remote_addr.get_port();
+
+	//g_packet_info.src_ip=source_address_uint32;
+	//g_packet_info.src_port=source_port;
+
+    udp_fd=socket(local_addr.get_type(), SOCK_DGRAM, IPPROTO_UDP);
+    set_buf_size(udp_fd,socket_buf_size);
+
+	int yes = 1;
+	//setsockopt(udp_fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
+
+	//struct sockaddr_in local_me={0};
+
+	//socklen_t slen = sizeof(sockaddr_in);
+	//memset(&local_me, 0, sizeof(local_me));
+	//local_me.sin_family = AF_INET;
+	//local_me.sin_port = local_addr.get_type();
+	//local_me.sin_addr.s_addr = local_addr.inner.ipv4.sin_addr.s_addr;
+
+
+	if (bind(udp_fd, (struct sockaddr*) &local_addr.inner, local_addr.get_len()) == -1) {
+		mylog(log_fatal,"socket bind error\n");
+		//perror("socket bind error");
+		myexit(1);
+	}
+	setnonblocking(udp_fd);
+	epollfd = epoll_create1(0);
+
+	const int max_events = 4096;
+	struct epoll_event ev, events[max_events];
+	if (epollfd < 0) {
+		mylog(log_fatal,"epoll return %d\n", epollfd);
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = udp_fd;
+	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, udp_fd, &ev);
+	if (ret!=0) {
+		mylog(log_fatal,"add  udp_listen_fd error\n");
+		myexit(-1);
+	}
+	ev.events = EPOLLIN;
+	ev.data.u64 = raw_recv_fd;
+
+	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
+	if (ret!= 0) {
+		mylog(log_fatal,"add raw_fd error\n");
+		myexit(-1);
+	}
+
+	////add_timer for fake_tcp_keep_connection_client
+
+	//sleep(10);
+
+	//memset(&udp_old_addr_in,0,sizeof(sockaddr_in));
+	int unbind=1;
+
+	set_timer(epollfd,timer_fd);
+
+	mylog(log_debug,"send_raw : from %s %d  to %s %d\n",send_info.new_src_ip.get_str1(),send_info.src_port,send_info.new_dst_ip.get_str2(),send_info.dst_port);
+	int fifo_fd=-1;
+
+	if(fifo_file[0]!=0)
+	{
+		fifo_fd=create_fifo(fifo_file);
+		ev.events = EPOLLIN;
+		ev.data.u64 = fifo_fd;
+
+		ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, fifo_fd, &ev);
+		if (ret!= 0) {
+			mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
+			myexit(-1);
+		}
+		mylog(log_info,"fifo_file=%s\n",fifo_file);
+	}
+	while(1)////////////////////////
+	{
+		if(about_to_exit) myexit(0);
+		epoll_trigger_counter++;
+		int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
+		if (nfds < 0) {  //allow zero
+			if(errno==EINTR  )
+			{
+				mylog(log_info,"epoll interrupted by signal,continue\n");
+				//close(fifo_fd);
+				//myexit(0);
+			}
+			else
+			{
+				mylog(log_fatal,"epoll_wait return %d,%s\n", nfds,strerror(errno));
+				myexit(-1);
+			}
+		}
+		int idx;
+		for (idx = 0; idx < nfds; ++idx) {
+			if (events[idx].data.u64 == (u64_t)raw_recv_fd)
+			{
+				//iphdr *iph;tcphdr *tcph;
+				client_on_raw_recv(conn_info);
+			}
+			else if(events[idx].data.u64 ==(u64_t)timer_fd)
+			{
+				u64_t value;
+				int unused=read(timer_fd, &value, 8);
+				client_on_timer(conn_info);
+				mylog(log_trace,"epoll_trigger_counter:  %d \n",epoll_trigger_counter);
+				epoll_trigger_counter=0;
+			}
+			else if (events[idx].data.u64 == (u64_t)udp_fd)
+			{
+				client_on_udp_recv(conn_info);
+			}
+			else if (events[idx].data.u64 == (u64_t)fifo_fd)
+			{
+				int len=read (fifo_fd, buf, sizeof (buf));
+				//assert(len>=0);
+				if(len<0)
+				{
+					mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+				buf[len]=0;
+				while(len>=1&&buf[len-1]=='\n')
+					buf[len-1]=0;
+				mylog(log_info,"got data from fifo,len=%d,s=[%s]\n",len,buf);
+				if(strcmp(buf,"reconnect")==0)
+				{
+					mylog(log_info,"received command: reconnect\n");
+					conn_info.state.client_current_state=client_idle;
+					conn_info.my_id=get_true_random_number_nz();
+				}
+				else
+				{
+					mylog(log_info,"unknown command\n");
+				}
+
+			}
+			else
+			{
+				mylog(log_fatal,"unknown fd,this should never happen\n");
+				myexit(-1);
+			}
+		}
+	}
+	return 0;
+}
diff --git a/main.cpp b/main.cpp
index b12851a..5aabafa 100755
--- a/main.cpp
+++ b/main.cpp
@@ -7,1763 +7,8 @@
 #include "encrypt.h"
 #include "fd_manager.h"
 
-
-char hb_buf[buf_len];
-
-int on_epoll_recv_event=0;  //TODO, just a flag to help detect epoll infinite shoot
-
-int server_easytcp=0;//currently only for test
-
-int client_on_timer(conn_info_t &conn_info) //for client. called when a timer is ready in epoll
-{
-	//keep_iptables_rule();
-	packet_info_t &send_info=conn_info.raw_info.send_info;
-	packet_info_t &recv_info=conn_info.raw_info.recv_info;
-	raw_info_t &raw_info=conn_info.raw_info;
-	conn_info.blob->conv_manager.c.clear_inactive();
-	mylog(log_trace,"timer!\n");
-
-	mylog(log_trace,"roller my %d,oppsite %d,%lld\n",int(conn_info.my_roller),int(conn_info.oppsite_roller),conn_info.last_oppsite_roller_time);
-
-	mylog(log_trace,"<client_on_timer,send_info.ts_ack= %u>\n",send_info.ts_ack);
-
-	if(raw_info.disabled)
-	{
-		conn_info.state.client_current_state=client_idle;
-		conn_info.my_id=get_true_random_number_nz();
-
-		mylog(log_info,"state back to client_idle\n");
-	}
-
-	if(conn_info.state.client_current_state==client_idle)
-	{
-		raw_info.rst_received=0;
-		raw_info.disabled=0;
-
-		fail_time_counter++;
-		if(max_fail_time>0&&fail_time_counter>max_fail_time)
-		{
-			mylog(log_fatal,"max_fail_time exceed\n");
-			myexit(-1);
-		}
-
-		conn_info.blob->anti_replay.re_init();
-		conn_info.my_id = get_true_random_number_nz(); ///todo no need to do this everytime
-
-
-
-		address_t tmp_addr;
-		//u32_t new_ip=0;
-		if(!force_source_ip)
-		{
-			if(get_src_adress2(tmp_addr,remote_addr)!=0)
-			{
-				mylog(log_warn,"get_src_adress() failed\n");
-				return -1;
-			}
-			//source_addr=new_addr;
-			//source_addr.set_port(0);
-
-			mylog(log_info,"source_addr is now %s\n",tmp_addr.get_ip());
-
-			/*
-			if(new_ip!=source_ip_uint32)
-			{
-				mylog(log_info,"source ip changed from %s to ",my_ntoa(source_ip_uint32));
-				log_bare(log_info,"%s\n",my_ntoa(new_ip));
-				source_ip_uint32=new_ip;
-				send_info.src_ip=new_ip;
-			}*/
-
-		}
-		else
-		{
-			tmp_addr=source_addr;
-		}
-
-		send_info.new_src_ip.from_address_t(tmp_addr);
-
-		if (force_source_port == 0)
-		{
-			send_info.src_port = client_bind_to_a_new_port2(bind_fd,tmp_addr);
-		}
-		else
-		{
-			send_info.src_port = source_port;
-		}
-
-		if (raw_mode == mode_icmp)
-		{
-			send_info.dst_port = send_info.src_port;
-		}
-
-		mylog(log_info, "using port %d\n", send_info.src_port);
-		init_filter(send_info.src_port);
-
-		if(raw_mode==mode_icmp||raw_mode==mode_udp)
-		{
-			conn_info.state.client_current_state=client_handshake1;
-
-			mylog(log_info,"state changed from client_idle to client_pre_handshake\n");
-		}
-		if(raw_mode==mode_faketcp)
-		{
-			conn_info.state.client_current_state=client_tcp_handshake;
-			mylog(log_info,"state changed from client_idle to client_tcp_handshake\n");
-
-		}
-		conn_info.last_state_time=get_current_time();
-		conn_info.last_hb_sent_time=0;
-		//dont return;
-	}
-	if(conn_info.state.client_current_state==client_tcp_handshake)  //send and resend syn
-	{
-		assert(raw_mode==mode_faketcp);
-		if (get_current_time() - conn_info.last_state_time > client_handshake_timeout)
-		{
-			conn_info.state.client_current_state = client_idle;
-			mylog(log_info, "state back to client_idle from client_tcp_handshake\n");
-			return 0;
-
-		}
-		else if (get_current_time() - conn_info.last_hb_sent_time > client_retry_interval)
-		{
-
-			if (raw_mode == mode_faketcp)
-			{
-				if (conn_info.last_hb_sent_time == 0)
-				{
-					send_info.psh = 0;
-					send_info.syn = 1;
-					send_info.ack = 0;
-					send_info.ts_ack =0;
-					send_info.seq=get_true_random_number();
-					send_info.ack_seq=get_true_random_number();
-				}
-			}
-
-			send_raw0(raw_info, 0, 0);
-
-			conn_info.last_hb_sent_time = get_current_time();
-			mylog(log_info, "(re)sent tcp syn\n");
-			return 0;
-		}
-		else
-		{
-			return 0;
-		}
-		return 0;
-	}
-	else if(conn_info.state.client_current_state==client_handshake1)//send and resend handshake1
-	{
-		if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
-		{
-			conn_info.state.client_current_state=client_idle;
-			mylog(log_info,"state back to client_idle from client_handshake1\n");
-			return 0;
-
-		}
-		else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
-		{
-
-			if(raw_mode==mode_faketcp)
-			{
-				if(conn_info.last_hb_sent_time==0)
-				{
-					send_info.seq++;
-					send_info.ack_seq=recv_info.seq+1;
-					send_info.ts_ack=recv_info.ts;
-					raw_info.reserved_send_seq=send_info.seq;
-				}
-				send_info.seq=raw_info.reserved_send_seq;
-				send_info.psh = 0;
-				send_info.syn = 0;
-				send_info.ack = 1;
-				send_raw0(raw_info, 0, 0);
-
-				send_handshake(raw_info,conn_info.my_id,0,const_id);
-
-				send_info.seq+=raw_info.send_info.data_len;
-			}
-			else
-			{
-
-				send_handshake(raw_info,conn_info.my_id,0,const_id);
-				if(raw_mode==mode_icmp)
-					send_info.my_icmp_seq++;
-			}
-
-			conn_info.last_hb_sent_time=get_current_time();
-			mylog(log_info,"(re)sent handshake1\n");
-			return 0;
-		}
-		else
-		{
-			return 0;
-		}
-		return 0;
-	}
-	else if(conn_info.state.client_current_state==client_handshake2)
-	{
-		if(get_current_time()-conn_info.last_state_time>client_handshake_timeout)
-		{
-			conn_info.state.client_current_state=client_idle;
-			mylog(log_info,"state back to client_idle from client_handshake2\n");
-			return 0;
-		}
-		else if(get_current_time()-conn_info.last_hb_sent_time>client_retry_interval)
-		{
-			if(raw_mode==mode_faketcp)
-			{
-				if(conn_info.last_hb_sent_time==0)
-				{
-					send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
-					send_info.ts_ack=recv_info.ts;
-					raw_info.reserved_send_seq=send_info.seq;
-				}
-				send_info.seq=raw_info.reserved_send_seq;
-				send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
-				send_info.seq+=raw_info.send_info.data_len;
-
-			}
-			else
-			{
-
-				send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);
-				if(raw_mode==mode_icmp)
-					send_info.my_icmp_seq++;
-			}
-			conn_info.last_hb_sent_time=get_current_time();
-			mylog(log_info,"(re)sent handshake2\n");
-			return 0;
-
-		}
-		else
-		{
-			return 0;
-		}
-		return 0;
-	}
-	else if(conn_info.state.client_current_state==client_ready)
-	{
-		fail_time_counter=0;
-		mylog(log_trace,"time %llu,%llu\n",get_current_time(),conn_info.last_state_time);
-
-		if(get_current_time()-conn_info.last_hb_recv_time>client_conn_timeout)
-		{
-			conn_info.state.client_current_state=client_idle;
-			conn_info.my_id=get_true_random_number_nz();
-			mylog(log_info,"state back to client_idle from  client_ready bc of server-->client direction timeout\n");
-			return 0;
-		}
-
-		if(get_current_time()- conn_info.last_oppsite_roller_time>client_conn_uplink_timeout)
-		{
-			conn_info.state.client_current_state=client_idle;
-			conn_info.my_id=get_true_random_number_nz();
-			mylog(log_info,"state back to client_idle from  client_ready bc of client-->server direction timeout\n");
-		}
-
-
-		if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
-		{
-			return 0;
-		}
-
-
-
-		mylog(log_debug,"heartbeat sent <%x,%x>\n",conn_info.oppsite_id,conn_info.my_id);
-
-		if(hb_mode==0)
-			send_safer(conn_info,'h',hb_buf,0);/////////////send
-		else
-			send_safer(conn_info,'h',hb_buf,hb_len);
-		conn_info.last_hb_sent_time=get_current_time();
-		return 0;
-	}
-	else
-	{
-		mylog(log_fatal,"unknown state,this shouldnt happen.\n");
-		myexit(-1);
-	}
-	return 0;
-}
-int client_on_raw_recv(conn_info_t &conn_info) //called when raw fd received a packet.
-{
-	char* data;int data_len;
-	packet_info_t &send_info=conn_info.raw_info.send_info;
-	packet_info_t &recv_info=conn_info.raw_info.recv_info;
-
-	raw_info_t &raw_info=conn_info.raw_info;
-
-	mylog(log_trace,"<client_on_raw_recv,send_info.ts_ack= %u>\n",send_info.ts_ack);
-	if(pre_recv_raw_packet()<0) return -1;
-
-	if(conn_info.state.client_current_state==client_idle )
-	{
-
-		discard_raw_packet();
-		//recv(raw_recv_fd, 0,0, 0  );
-	}
-	else if(conn_info.state.client_current_state==client_tcp_handshake)//received syn ack
-	{
-		assert(raw_mode==mode_faketcp);
-		if(recv_raw0(raw_info,data,data_len)<0)
-		{
-			return -1;
-		}
-		if(!recv_info.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
-		{
-			mylog(log_debug,"unexpected adress %s %s %d %d\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
-			return -1;
-		}
-		if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==1)
-		{
-			if(recv_info.ack_seq!=send_info.seq+1)
-			{
-				mylog(log_debug,"seq ack_seq mis match\n");
-							return -1;
-			}
-
-			conn_info.state.client_current_state = client_handshake1;
-			mylog(log_info,"state changed from client_tcp_handshake to client_handshake1\n");
-			conn_info.last_state_time = get_current_time();
-			conn_info.last_hb_sent_time=0;
-			client_on_timer(conn_info);
-			return 0;
-		}
-		else
-		{
-			mylog(log_debug,"unexpected packet type,expected:syn ack\n");
-			return -1;
-		}
-	}
-	else if(conn_info.state.client_current_state==client_handshake1)//recevied respond of handshake1
-	{
-		if(recv_bare(raw_info,data,data_len)!=0)
-		{
-			mylog(log_debug,"recv_bare failed!\n");
-			return -1;
-		}
-		if(!recv_info.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
-		{
-			mylog(log_debug,"unexpected adress %s %s %d %d\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
-			return -1;
-		}
-		if(data_len<int( 3*sizeof(my_id_t)))
-		{
-			mylog(log_debug,"too short to be a handshake\n");
-			return -1;
-		}
-		//id_t tmp_oppsite_id=  ntohl(* ((u32_t *)&data[0]));
-		my_id_t tmp_oppsite_id;
-		memcpy(&tmp_oppsite_id,&data[0],sizeof(tmp_oppsite_id));
-		tmp_oppsite_id=ntohl(tmp_oppsite_id);
-
-		//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
-		my_id_t tmp_my_id;
-		memcpy(&tmp_my_id,&data[sizeof(my_id_t)],sizeof(tmp_my_id));
-		tmp_my_id=ntohl(tmp_my_id);
-
-		//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
-		my_id_t tmp_oppsite_const_id;
-		memcpy(&tmp_oppsite_const_id,&data[sizeof(my_id_t)*2],sizeof(tmp_oppsite_const_id));
-		tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
-
-		if(tmp_my_id!=conn_info.my_id)
-		{
-			mylog(log_debug,"tmp_my_id doesnt match\n");
-			return -1;
-		}
-
-
-		if(raw_mode==mode_faketcp)
-		{
-			if(recv_info.ack_seq!=send_info.seq)
-			{
-				mylog(log_debug,"seq ack_seq mis match\n");
-							return -1;
-			}
-			if(recv_info.seq!=send_info.ack_seq)
-			{
-				mylog(log_debug,"seq ack_seq mis match\n");
-							return -1;
-			}
-		}
-		conn_info.oppsite_id=tmp_oppsite_id;
-
-		mylog(log_info,"changed state from to client_handshake1 to client_handshake2,my_id is %x,oppsite id is %x\n",conn_info.my_id,conn_info.oppsite_id);
-
-		//send_handshake(raw_info,conn_info.my_id,conn_info.oppsite_id,const_id);  //////////////send
-		conn_info.state.client_current_state = client_handshake2;
-		conn_info.last_state_time = get_current_time();
-		conn_info.last_hb_sent_time=0;
-		client_on_timer(conn_info);
-
-		return 0;
-	}
-	else if(conn_info.state.client_current_state==client_handshake2||conn_info.state.client_current_state==client_ready)//received heartbeat or data
-	{
-		char type;
-		if(recv_safer(conn_info,type,data,data_len)!=0)
-		{
-			mylog(log_debug,"recv_safer failed!\n");
-			return -1;
-		}
-		if(!recv_info.new_src_ip.equal(send_info.new_dst_ip)||recv_info.src_port!=send_info.dst_port)
-		{
-			mylog(log_warn,"unexpected adress %s %s %d %d,this shouldnt happen.\n",recv_info.new_src_ip.get_str1(),send_info.new_dst_ip.get_str2(),recv_info.src_port,send_info.dst_port);
-			return -1;
-		}
-		if(conn_info.state.client_current_state==client_handshake2)
-		{
-			mylog(log_info,"changed state from to client_handshake2 to client_ready\n");
-			conn_info.state.client_current_state=client_ready;
-			conn_info.last_hb_sent_time=0;
-			conn_info.last_hb_recv_time=get_current_time();
-			conn_info.last_oppsite_roller_time=conn_info.last_hb_recv_time;
-			client_on_timer(conn_info);
-		}
-		if(data_len>=0&&type=='h')
-		{
-			mylog(log_debug,"[hb]heart beat received,oppsite_roller=%d\n",int(conn_info.oppsite_roller));
-			conn_info.last_hb_recv_time=get_current_time();
-			return 0;
-		}
-		else if(data_len>= int( sizeof(u32_t))&&type=='d')
-		{
-			mylog(log_trace,"received a data from fake tcp,len:%d\n",data_len);
-
-			if(hb_mode==0)
-				conn_info.last_hb_recv_time=get_current_time();
-
-			//u32_t tmp_conv_id= ntohl(* ((u32_t *)&data[0]));
-			u32_t tmp_conv_id;
-			memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
-			tmp_conv_id=ntohl(tmp_conv_id);
-
-			if(!conn_info.blob->conv_manager.c.is_conv_used(tmp_conv_id))
-			{
-				mylog(log_info,"unknow conv %d,ignore\n",tmp_conv_id);
-				return 0;
-			}
-
-			conn_info.blob->conv_manager.c.update_active_time(tmp_conv_id);
-
-			//u64_t u64=conn_info.blob->conv_manager.c.find_data_by_conv(tmp_conv_id);
-
-			address_t tmp_addr=conn_info.blob->conv_manager.c.find_data_by_conv(tmp_conv_id);
-
-			//sockaddr_in tmp_sockaddr={0};
-
-			//tmp_sockaddr.sin_family = AF_INET;
-			//tmp_sockaddr.sin_addr.s_addr=(u64>>32u);
-
-			//tmp_sockaddr.sin_port= htons(uint16_t((u64<<32u)>>32u));
-
-
-			int ret=sendto(udp_fd,data+sizeof(u32_t),data_len -(sizeof(u32_t)),0,(struct sockaddr *)&tmp_addr.inner,tmp_addr.get_len());
-
-			if(ret<0)
-			{
-		    	mylog(log_warn,"sento returned %d,%s,%02x,%s\n",ret,strerror(errno),int(tmp_addr.get_type()),tmp_addr.get_str());
-				//perror("ret<0");
-			}
-			//mylog(log_trace,"%s :%d\n",inet_ntoa(tmp_sockaddr.sin_addr),ntohs(tmp_sockaddr.sin_port));
-			mylog(log_trace,"%d byte sent\n",ret);
-		}
-		else
-		{
-			mylog(log_warn,"unknown packet,this shouldnt happen.\n");
-						return -1;
-		}
-
-		return 0;
-	}
-	else
-	{
-		mylog(log_fatal,"unknown state,this shouldnt happen.\n");
-		myexit(-1);
-	}
-	return 0;
-}
-int client_on_udp_recv(conn_info_t &conn_info)
-{
-	int recv_len;
-	char buf[buf_len];
-	address_t::storage_t udp_new_addr_in={0};
-	socklen_t udp_new_addr_len = sizeof(address_t::storage_t);
-	if ((recv_len = recvfrom(udp_fd, buf, max_data_len+1, 0,
-			(struct sockaddr *) &udp_new_addr_in, &udp_new_addr_len)) == -1) {
-		mylog(log_warn,"recv_from error,%s\n",strerror(errno));
-		//myexit(1);
-	};
-
-	if(recv_len==max_data_len+1)
-	{
-		mylog(log_warn,"huge packet, data_len > %d,dropped\n",max_data_len);
-		return -1;
-	}
-
-	if(recv_len>=mtu_warn)
-	{
-		mylog(log_warn,"huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ",recv_len,mtu_warn);
-	}
-	//mylog(log_trace,"Received packet from %s:%d,len: %d\n", inet_ntoa(udp_new_addr_in.sin_addr),
-		//	ntohs(udp_new_addr_in.sin_port),recv_len);
-
-	/*
-	if(udp_old_addr_in.sin_addr.s_addr==0&&udp_old_addr_in.sin_port==0)
-	{
-		memcpy(&udp_old_addr_in,&udp_new_addr_in,sizeof(udp_new_addr_in));
-	}
-	else if(udp_new_addr_in.sin_addr.s_addr!=udp_old_addr_in.sin_addr.s_addr
-			||udp_new_addr_in.sin_port!=udp_old_addr_in.sin_port)
-	{
-		if(get_current_time()- last_udp_recv_time <udp_timeout)
-		{
-			printf("new <ip,port> connected in,ignored,bc last connection is still active\n");
-			continue;
-		}
-		else
-		{
-			printf("new <ip,port> connected in,accpeted\n");
-			memcpy(&udp_old_addr_in,&udp_new_addr_in,sizeof(udp_new_addr_in));
-			conv_id++;
-		}
-	}*/
-
-	//last_udp_recv_time=get_current_time();
-	address_t tmp_addr;
-	tmp_addr.from_sockaddr((sockaddr *)&udp_new_addr_in,udp_new_addr_len);
-	//u64_t u64=((u64_t(udp_new_addr_in.sin_addr.s_addr))<<32u)+ntohs(udp_new_addr_in.sin_port);
-	u32_t conv;
-
-	//u64_t u64;//////todo
-	if(!conn_info.blob->conv_manager.c.is_data_used(tmp_addr))
-	{
-		if(conn_info.blob->conv_manager.c.get_size() >=max_conv_num)
-		{
-			mylog(log_warn,"ignored new udp connect bc max_conv_num exceed\n");
-			return -1;
-		}
-		conv=conn_info.blob->conv_manager.c.get_new_conv();
-		conn_info.blob->conv_manager.c.insert_conv(conv,tmp_addr);
-		mylog(log_info,"new packet from %s,conv_id=%x\n",tmp_addr.get_str(),conv);
-	}
-	else
-	{
-		conv=conn_info.blob->conv_manager.c.find_conv_by_data(tmp_addr);
-	}
-
-	conn_info.blob->conv_manager.c.update_active_time(conv);
-
-	if(conn_info.state.client_current_state==client_ready)
-	{
-		/*
-		char buf2[6000];
-		int ret1=send_raw(conn_info.raw_info,buf2,40);
-		int ret2=send_raw(conn_info.raw_info,buf2,500);
-		int ret3=send_raw(conn_info.raw_info,buf2,1000);
-		int ret4=send_raw(conn_info.raw_info,buf2,2000);
-		mylog(log_warn,"ret= %d %d %d %d\n",ret1,ret2,ret3,ret4);*/
-
-		send_data_safer(conn_info,buf,recv_len,conv);
-	}
-	return 0;
-}
-
-
-
-/*
-int server_on_raw_recv_handshake1(conn_info_t &conn_info,id_t tmp_oppsite_id )
-{
-	packet_info_t &send_info=conn_info.raw_info.send_info;
-	packet_info_t &recv_info=conn_info.raw_info.recv_info;
-	raw_info_t &raw_info=conn_info.raw_info;
-
-
-
-	return 0;
-}*/
-int server_on_timer_multi(conn_info_t &conn_info)  //for server. called when a timer is ready in epoll.for server,there will be one timer for every connection
-// there is also a global timer for server,but its not handled here
-{
-	char ip_port[40];
-	//u32_t ip=conn_info.raw_info.send_info.dst_ip;
-	//u32_t port=conn_info.raw_info.send_info.dst_port;
-
-	address_t tmp_addr;
-	tmp_addr.from_ip_port_new(raw_ip_version,&conn_info.raw_info.send_info.new_dst_ip,conn_info.raw_info.send_info.dst_port);
-	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
-	tmp_addr.to_str(ip_port);
-
-	//keep_iptables_rule();
-	mylog(log_trace,"server timer!\n");
-	raw_info_t &raw_info=conn_info.raw_info;
-
-	assert(conn_info.state.server_current_state==server_ready);
-
-
-	if(conn_info.state.server_current_state==server_ready)
-	{
-		conn_info.blob->conv_manager.s.clear_inactive(ip_port);
-		/*
-		if( get_current_time()-conn_info.last_hb_recv_time>heartbeat_timeout )
-		{
-			mylog(log_trace,"%lld %lld\n",get_current_time(),conn_info.last_state_time);
-			conn_info.server_current_state=server_nothing;
-
-			//conn_manager.current_ready_ip=0;
-			//conn_manager.current_ready_port=0;
-
-			mylog(log_info,"changed state to server_nothing\n");
-			return 0;
-		}*/  //dont need to do this at server,conn_manger will clear expired connections
-
-		if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
-		{
-			return 0;
-		}
-
-		if(hb_mode==0)
-			send_safer(conn_info,'h',hb_buf,0);  /////////////send
-		else
-			send_safer(conn_info,'h',hb_buf,hb_len);
-		conn_info.last_hb_sent_time=get_current_time();
-
-		mylog(log_debug,"heart beat sent<%x,%x>\n",conn_info.my_id,conn_info.oppsite_id);
-	}
-	else
-	{
-		mylog(log_fatal,"this shouldnt happen!\n");
-		myexit(-1);
-	}
-	return 0;
-
-}
-int server_on_raw_recv_ready(conn_info_t &conn_info,char * ip_port,char type,char *data,int data_len)  //called while the state for a connection is server_ready
-//receives data and heart beat by recv_safer.
-{
-
-	raw_info_t &raw_info = conn_info.raw_info;
-	packet_info_t &send_info = conn_info.raw_info.send_info;
-	packet_info_t &recv_info = conn_info.raw_info.recv_info;
-	//char ip_port[40];
-
-	//sprintf(ip_port,"%s:%d",my_ntoa(recv_info.src_ip),recv_info.src_port);
-
-
-/*
-	if (recv_info.src_ip != send_info.dst_ip
-			|| recv_info.src_port != send_info.dst_port) {
-		mylog(log_debug, "unexpected adress\n");
-		return 0;
-	}*/
-
-	if (type == 'h' && data_len >= 0) {
-		//u32_t tmp = ntohl(*((u32_t *) &data[sizeof(u32_t)]));
-		mylog(log_debug,"[%s][hb]received hb \n",ip_port);
-		conn_info.last_hb_recv_time = get_current_time();
-		return 0;
-	} else if (type== 'd' && data_len >=int( sizeof(u32_t) ))
-	{
-
-		//u32_t tmp_conv_id = ntohl(*((u32_t *) &data[0]));
-		my_id_t tmp_conv_id;
-		memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
-		tmp_conv_id=ntohl(tmp_conv_id);
-
-
-		if(hb_mode==0)
-			conn_info.last_hb_recv_time = get_current_time();
-
-		mylog(log_trace, "conv:%u\n", tmp_conv_id);
-		if (!conn_info.blob->conv_manager.s.is_conv_used(tmp_conv_id)) {
-			if (conn_info.blob->conv_manager.s.get_size() >= max_conv_num) {
-				mylog(log_warn,
-						"[%s]ignored new conv %x connect bc max_conv_num exceed\n",ip_port,
-						tmp_conv_id);
-				return 0;
-			}
-			
-			/*
-			struct sockaddr_in remote_addr_in={0};
-
-			socklen_t slen = sizeof(sockaddr_in);
-			//memset(&remote_addr_in, 0, sizeof(remote_addr_in));
-			remote_addr_in.sin_family = AF_INET;
-			remote_addr_in.sin_port = htons(remote_port);
-			remote_addr_in.sin_addr.s_addr = remote_ip_uint32;
-
-
-
-			int new_udp_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-
-
-			if (new_udp_fd < 0) {
-				mylog(log_warn, "[%s]create udp_fd error\n",ip_port);
-				return -1;
-			}
-			setnonblocking(new_udp_fd);
-			set_buf_size(new_udp_fd,socket_buf_size);
-
-			mylog(log_debug, "[%s]created new udp_fd %d\n",ip_port, new_udp_fd);
-			int ret = connect(new_udp_fd, (struct sockaddr *) &remote_addr_in,
-					slen);
-			if (ret != 0) {
-				mylog(log_warn, "udp fd connect fail\n");
-				close(new_udp_fd);
-				return -1;
-			}*/
-
-			int new_udp_fd=remote_addr.new_connected_udp_fd();
-			if (new_udp_fd < 0) {
-				mylog(log_warn, "[%s]new_connected_udp_fd() failed\n",ip_port);
-				return -1;
-			}
-
-			struct epoll_event ev;
-
-			fd64_t new_udp_fd64 =  fd_manager.create(new_udp_fd);
-			fd_manager.get_info(new_udp_fd64).p_conn_info=&conn_info;
-
-			mylog(log_trace, "[%s]u64: %lld\n",ip_port, new_udp_fd64);
-			ev.events = EPOLLIN;
-
-			ev.data.u64 = new_udp_fd64;
-
-			int ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, new_udp_fd, &ev);
-
-			if (ret != 0) {
-				mylog(log_warn, "[%s]add udp_fd error\n",ip_port);
-				close(new_udp_fd);
-				return -1;
-			}
-
-			conn_info.blob->conv_manager.s.insert_conv(tmp_conv_id, new_udp_fd64);
-
-
-
-			//assert(conn_manager.udp_fd_mp.find(new_udp_fd)==conn_manager.udp_fd_mp.end());
-
-			//conn_manager.udp_fd_mp[new_udp_fd] = &conn_info;
-
-			//pack_u64(conn_info.raw_info.recv_info.src_ip,conn_info.raw_info.recv_info.src_port);
-
-			mylog(log_info, "[%s]new conv conv_id=%x, assigned fd=%d\n",ip_port,
-					tmp_conv_id, new_udp_fd);
-
-
-
-		}
-
-		fd64_t fd64 = conn_info.blob->conv_manager.s.find_data_by_conv(tmp_conv_id);
-
-		conn_info.blob->conv_manager.s.update_active_time(tmp_conv_id);
-
-		int fd = fd_manager.to_fd(fd64);
-
-		mylog(log_trace, "[%s]received a data from fake tcp,len:%d\n",ip_port, data_len);
-		int ret = send(fd, data + sizeof(u32_t),
-				data_len - ( sizeof(u32_t)), 0);
-
-		mylog(log_trace, "[%s]%d byte sent  ,fd :%d\n ",ip_port, ret, fd);
-		if (ret < 0) {
-			mylog(log_warn, "send returned %d\n", ret);
-			//perror("what happened????");
-		}
-		return 0;
-	}
-	return 0;
-}
-
-int server_on_raw_recv_pre_ready(conn_info_t &conn_info,char * ip_port,u32_t tmp_oppsite_const_id)// do prepare work before state change to server ready for a specifc connection
-//connection recovery is also handle here
-{
-	//u32_t ip;uint16_t port;
-	//ip=conn_info.raw_info.recv_info.src_ip;
-	//port=conn_info.raw_info.recv_info.src_port;
-	//char ip_port[40];
-	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
-
-	mylog(log_info,"[%s]received handshake oppsite_id:%x  my_id:%x\n",ip_port,conn_info.oppsite_id,conn_info.my_id);
-
-	mylog(log_info,"[%s]oppsite const_id:%x \n",ip_port,tmp_oppsite_const_id);
-	if(conn_manager.const_id_mp.find(tmp_oppsite_const_id)==conn_manager.const_id_mp.end())
-	{
-		//conn_manager.const_id_mp=
-
-		if(conn_manager.ready_num>=max_ready_conn_num)
-		{
-			mylog(log_info,"[%s]max_ready_conn_num,cant turn to ready\n",ip_port);
-			conn_info.state.server_current_state =server_idle;
-			return 0;
-		}
-
-		conn_info.prepare();
-		conn_info.state.server_current_state = server_ready;
-		conn_info.oppsite_const_id=tmp_oppsite_const_id;
-		conn_manager.ready_num++;
-		conn_manager.const_id_mp[tmp_oppsite_const_id]=&conn_info;
-
-
-		//conn_info.last_state_time=get_current_time(); //dont change this!!!!!!!!!!!!!!!!!!!!!!!!!
-
-		//conn_manager.current_ready_ip=ip;
-		//conn_manager.current_ready_port=port;
-
-		//my_id=conn_info.my_id;
-		//oppsite_id=conn_info.oppsite_id;
-		conn_info.last_hb_recv_time = get_current_time();
-
-		conn_info.last_hb_sent_time = conn_info.last_hb_recv_time;//=get_current_time()
-
-		if(hb_mode==0)
-			send_safer(conn_info,'h',hb_buf,0);/////////////send
-		else
-			send_safer(conn_info,'h',hb_buf,hb_len);
-
-		mylog(log_info, "[%s]changed state to server_ready\n",ip_port);
-		conn_info.blob->anti_replay.re_init();
-
-		//g_conn_info=conn_info;
-		int new_timer_fd;
-		set_timer_server(epollfd, new_timer_fd,conn_info.timer_fd64);
-
-		fd_manager.get_info(conn_info.timer_fd64).p_conn_info=&conn_info;
-		//assert(conn_manager.timer_fd_mp.find(new_timer_fd)==conn_manager.timer_fd_mp.end());
-		//conn_manager.timer_fd_mp[new_timer_fd] = &conn_info;//pack_u64(ip,port);
-
-
-		//timer_fd_mp[new_timer_fd]
-		/*
-		 if(oppsite_const_id!=0&&tmp_oppsite_const_id!=oppsite_const_id)  //TODO MOVE TO READY
-		 {
-		 mylog(log_info,"cleared all conv bc of const id doesnt match\n");
-		 conv_manager.clear();
-		 }*/
-		//oppsite_const_id=tmp_oppsite_const_id;
-	}
-	else
-	{
-
-		conn_info_t &ori_conn_info=*conn_manager.const_id_mp[tmp_oppsite_const_id];
-
-		if(ori_conn_info.state.server_current_state==server_ready)
-		{
-			if(conn_info.last_state_time<ori_conn_info.last_state_time)
-			{
-				 mylog(log_info,"[%s]conn_info.last_state_time<ori_conn_info.last_state_time. ignored new handshake\n",ip_port);
-				 conn_info.state.server_current_state=server_idle;
-				 conn_info.oppsite_const_id=0;
-				 return 0;
-			}
-			address_t addr1;addr1.from_ip_port_new(raw_ip_version,&ori_conn_info.raw_info.recv_info.new_src_ip,ori_conn_info.raw_info.recv_info.src_port);
-			if(!conn_manager.exist(addr1))//TODO remove this
-			{
-				mylog(log_fatal,"[%s]this shouldnt happen\n",ip_port);
-				myexit(-1);
-			}
-			address_t addr2;addr2.from_ip_port_new(raw_ip_version,&conn_info.raw_info.recv_info.new_src_ip,conn_info.raw_info.recv_info.src_port);
-			if(!conn_manager.exist(addr2))//TODO remove this
-			{
-				mylog(log_fatal,"[%s]this shouldnt happen2\n",ip_port);
-				myexit(-1);
-			}
-			conn_info_t *&p_ori=conn_manager.find_insert_p(addr1);
-			conn_info_t *&p=conn_manager.find_insert_p(addr2);
-			conn_info_t *tmp=p;
-			p=p_ori;
-			p_ori=tmp;
-
-
-			mylog(log_info,"[%s]grabbed a connection\n",ip_port);
-
-
-			//ori_conn_info.state.server_current_state=server_ready;
-			ori_conn_info.recover(conn_info);
-
-			//send_safer(ori_conn_info, 'h',hb_buf, hb_len);
-			//ori_conn_info.blob->anti_replay.re_init();
-			if(hb_mode==0)
-				send_safer(ori_conn_info,'h',hb_buf,0);/////////////send
-			else
-				send_safer(ori_conn_info,'h',hb_buf,hb_len);
-
-			ori_conn_info.last_hb_recv_time=get_current_time();
-
-
-
-			conn_info.state.server_current_state=server_idle;
-			conn_info.oppsite_const_id=0;
-
-		}
-		else
-		{
-			mylog(log_fatal,"[%s]this should never happen\n",ip_port);
-			myexit(-1);
-		}
-		return 0;
-	}
-	return 0;
-}
-int server_on_raw_recv_handshake1(conn_info_t &conn_info,char * ip_port,char * data, int data_len)//called when server received a handshake1 packet from client
-{
-	packet_info_t &send_info=conn_info.raw_info.send_info;
-	packet_info_t &recv_info=conn_info.raw_info.recv_info;
-	raw_info_t &raw_info=conn_info.raw_info;
-
-	//u32_t ip=conn_info.raw_info.recv_info.src_ip;
-	//uint16_t port=conn_info.raw_info.recv_info.src_port;
-
-	//char ip_port[40];
-	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
-
-	if(data_len<int( 3*sizeof(my_id_t)))
-	{
-		mylog(log_debug,"[%s] data_len=%d too short to be a handshake\n",ip_port,data_len);
-		return -1;
-	}
-	//id_t tmp_oppsite_id=  ntohl(* ((u32_t *)&data[0]));
-	my_id_t tmp_oppsite_id;
-	memcpy(&tmp_oppsite_id,(u32_t *)&data[0],sizeof(tmp_oppsite_id));
-	tmp_oppsite_id=ntohl(tmp_oppsite_id);
-
-	//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
-	my_id_t tmp_my_id;
-	memcpy(&tmp_my_id,&data[sizeof(my_id_t)],sizeof(tmp_my_id));
-	tmp_my_id=ntohl(tmp_my_id);
-
-	if(tmp_my_id==0)  //received  init handshake again
-	{
-		if(raw_mode==mode_faketcp)
-		{
-			send_info.seq=recv_info.ack_seq;
-			send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
-			send_info.ts_ack=recv_info.ts;
-		}
-		if(raw_mode==mode_icmp)
-		{
-			send_info.my_icmp_seq=recv_info.my_icmp_seq;
-		}
-		send_handshake(raw_info,conn_info.my_id,tmp_oppsite_id,const_id);  //////////////send
-
-		mylog(log_info,"[%s]changed state to server_handshake1,my_id is %x\n",ip_port,conn_info.my_id);
-	}
-	else if(tmp_my_id==conn_info.my_id)
-	{
-		conn_info.oppsite_id=tmp_oppsite_id;
-		//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
-
-		my_id_t tmp_oppsite_const_id;
-		memcpy(&tmp_oppsite_const_id,&data[sizeof(my_id_t)*2],sizeof(tmp_oppsite_const_id));
-		tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
-
-
-		if(raw_mode==mode_faketcp)
-		{
-			send_info.seq=recv_info.ack_seq;
-			send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
-			send_info.ts_ack=recv_info.ts;
-		}
-
-		if(raw_mode==mode_icmp)
-		{
-			send_info.my_icmp_seq=recv_info.my_icmp_seq;
-		}
-
-		server_on_raw_recv_pre_ready(conn_info,ip_port,tmp_oppsite_const_id);
-
-	}
-	else
-	{
-		mylog(log_debug,"[%s]invalid my_id %x,my_id is %x\n",ip_port,tmp_my_id,conn_info.my_id);
-	}
-	return 0;
-}
-
-int server_on_raw_recv_multi() //called when server received an raw packet
-{
-	char dummy_buf[buf_len];
-	raw_info_t peek_raw_info;
-	peek_raw_info.peek=1;
-	packet_info_t &peek_info=peek_raw_info.recv_info;
-	mylog(log_trace,"got a packet\n");
-	if(pre_recv_raw_packet()<0) return -1;
-	if(peek_raw(peek_raw_info)<0)
-	{
-		discard_raw_packet();
-		//recv(raw_recv_fd, 0,0, 0  );//
-		//struct sockaddr saddr;
-		//socklen_t saddr_size=sizeof(saddr);
-		///recvfrom(raw_recv_fd, 0,0, 0 ,&saddr , &saddr_size);//
-		mylog(log_trace,"peek_raw failed\n");
-		return -1;
-	}else
-	{
-		mylog(log_trace,"peek_raw success\n");
-	}
-	//u32_t ip=peek_info.src_ip;uint16_t port=peek_info.src_port;
-
-
-	int data_len; char *data;
-
-	address_t addr;
-	addr.from_ip_port_new(raw_ip_version,&peek_info.new_src_ip,peek_info.src_port);
-
-	char ip_port[40];
-	addr.to_str(ip_port);
-	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
-	mylog(log_trace,"[%s]peek_raw\n",ip_port);
-
-	if(raw_mode==mode_faketcp&&peek_info.syn==1)
-	{
-		if(!conn_manager.exist(addr)||conn_manager.find_insert(addr).state.server_current_state!=server_ready)
-		{//reply any syn ,before state become ready
-
-			raw_info_t tmp_raw_info;
-			if(recv_raw0(tmp_raw_info,data,data_len)<0)
-			{
-				return 0;
-			}
-			if(server_easytcp!=0)
-				return 0;
-			raw_info_t &raw_info=tmp_raw_info;
-			packet_info_t &send_info=raw_info.send_info;
-			packet_info_t &recv_info=raw_info.recv_info;
-
-			send_info.new_src_ip=recv_info.new_dst_ip;
-			send_info.src_port=recv_info.dst_port;
-
-			send_info.dst_port = recv_info.src_port;
-			send_info.new_dst_ip = recv_info.new_src_ip;
-
-			if(lower_level)
-			{
-				handle_lower_level(raw_info);
-			}
-
-			if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==0)
-			{
-				send_info.ack_seq = recv_info.seq + 1;
-
-				send_info.psh = 0;
-				send_info.syn = 1;
-				send_info.ack = 1;
-				send_info.ts_ack=recv_info.ts;
-
-				mylog(log_info,"[%s]received syn,sent syn ack back\n",ip_port);
-				send_raw0(raw_info, 0, 0);
-				return 0;
-			}
-		}
-		else
-		{
-			discard_raw_packet();
-			//recv(raw_recv_fd, 0,0,0);
-		}
-		return 0;
-	}
-	if(!conn_manager.exist(addr))
-	{
-		if(conn_manager.mp.size()>=max_handshake_conn_num)
-		{
-			mylog(log_info,"[%s]reached max_handshake_conn_num,ignored new handshake\n",ip_port);
-			discard_raw_packet();
-			//recv(raw_recv_fd, 0,0, 0  );//
-			return 0;
-		}
-
-		raw_info_t tmp_raw_info;
-
-
-		if(raw_mode==mode_icmp)
-		{
-			tmp_raw_info.send_info.dst_port=tmp_raw_info.send_info.src_port=addr.get_port();
-		}
-		if(recv_bare(tmp_raw_info,data,data_len)<0)
-		{
-			return 0;
-		}
-		if(data_len<int( 3*sizeof(my_id_t)))
-		{
-			mylog(log_debug,"[%s]too short to be a handshake\n",ip_port);
-			return -1;
-		}
-
-		//id_t zero=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
-		my_id_t zero;
-		memcpy(&zero,&data[sizeof(my_id_t)],sizeof(zero));
-		zero=ntohl(zero);
-
-		if(zero!=0)
-		{
-			mylog(log_debug,"[%s]not a invalid initial handshake\n",ip_port);
-			return -1;
-		}
-
-		mylog(log_info,"[%s]got packet from a new ip\n",ip_port);
-
-		conn_info_t &conn_info=conn_manager.find_insert(addr);
-		conn_info.raw_info=tmp_raw_info;
-		raw_info_t &raw_info=conn_info.raw_info;
-
-		packet_info_t &send_info=conn_info.raw_info.send_info;
-		packet_info_t &recv_info=conn_info.raw_info.recv_info;
-
-		//conn_info.ip_port.ip=ip;
-		//conn_info.ip_port.port=port;
-
-
-
-		send_info.new_src_ip=recv_info.new_dst_ip;
-		send_info.src_port=recv_info.dst_port;
-
-		send_info.dst_port = recv_info.src_port;
-		send_info.new_dst_ip = recv_info.new_src_ip;
-
-		if(lower_level)
-		{
-			handle_lower_level(raw_info);
-		}
-
-		//id_t tmp_oppsite_id=  ntohl(* ((u32_t *)&data[0]));
-		//mylog(log_info,"[%s]handshake1 received %x\n",ip_port,tmp_oppsite_id);
-
-		conn_info.my_id=get_true_random_number_nz();
-
-
-		mylog(log_info,"[%s]created new conn,state: server_handshake1,my_id is %x\n",ip_port,conn_info.my_id);
-
-		conn_info.state.server_current_state = server_handshake1;
-		conn_info.last_state_time = get_current_time();
-
-		server_on_raw_recv_handshake1(conn_info,ip_port,data,data_len);
-		return 0;
-	}
-
-
-
-
-	conn_info_t & conn_info=conn_manager.find_insert(addr);//insert if not exist
-	packet_info_t &send_info=conn_info.raw_info.send_info;
-	packet_info_t &recv_info=conn_info.raw_info.recv_info;
-	raw_info_t &raw_info=conn_info.raw_info;
-
-	if(conn_info.state.server_current_state==server_handshake1)
-	{
-		if(recv_bare(raw_info,data,data_len)!=0)
-		{
-			return -1;
-		}
-		return server_on_raw_recv_handshake1(conn_info,ip_port,data,data_len);
-	}
-	if(conn_info.state.server_current_state==server_ready)
-	{
-		char type;
-		//mylog(log_info,"before recv_safer\n");
-		if (recv_safer(conn_info,type, data, data_len) != 0) {
-			return -1;
-		}
-		//mylog(log_info,"after recv_safer\n");
-		return server_on_raw_recv_ready(conn_info,ip_port,type,data,data_len);
-	}
-
-	if(conn_info.state.server_current_state==server_idle)
-	{
-		discard_raw_packet();
-		//recv(raw_recv_fd, 0,0, 0  );//
-		return 0;
-	}
-	mylog(log_fatal,"we should never run to here\n");
-	myexit(-1);
-	return -1;
-}
-
-int server_on_udp_recv(conn_info_t &conn_info,fd64_t fd64)
-{
-	char buf[buf_len];
-
-	if(conn_info.state.server_current_state!=server_ready)//TODO remove this for peformance
-	{
-		mylog(log_fatal,"p_conn_info->state.server_current_state!=server_ready!!!this shouldnt happen\n");
-		myexit(-1);
-	}
-
-	//conn_info_t &conn_info=*p_conn_info;
-
-	assert(conn_info.blob->conv_manager.s.is_data_used(fd64));
-
-	u32_t conv_id=conn_info.blob->conv_manager.s.find_conv_by_data(fd64);
-
-	int fd=fd_manager.to_fd(fd64);
-
-	int recv_len=recv(fd,buf,max_data_len+1,0);
-
-	mylog(log_trace,"received a packet from udp_fd,len:%d\n",recv_len);
-
-	if(recv_len==max_data_len+1)
-	{
-		mylog(log_warn,"huge packet, data_len > %d,dropped\n",max_data_len);
-		return -1;
-	}
-
-	if(recv_len<0)
-	{
-		mylog(log_debug,"udp fd,recv_len<0 continue,%s\n",strerror(errno));
-		return -1;
-	}
-
-	if(recv_len>=mtu_warn)
-	{
-		mylog(log_warn,"huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ",recv_len,mtu_warn);
-	}
-
-	//conn_info.conv_manager->update_active_time(conv_id);  server dosnt update from upd side,only update from raw side.  (client updates at both side)
-
-	if(conn_info.state.server_current_state==server_ready)
-	{
-		send_data_safer(conn_info,buf,recv_len,conv_id);
-		//send_data(g_packet_info_send,buf,recv_len,my_id,oppsite_id,conv_id);
-		mylog(log_trace,"send_data_safer ,sent !!\n");
-	}
-
-
-	return 0;
-}
-int client_event_loop()
-{
-
-
-	char buf[buf_len];
-
-	conn_info_t conn_info;
-	conn_info.my_id=get_true_random_number_nz();
-
-	conn_info.prepare();
-	packet_info_t &send_info=conn_info.raw_info.send_info;
-	packet_info_t &recv_info=conn_info.raw_info.recv_info;
-
-	if(lower_level)
-	{
-		if(lower_level_manual)
-		{
-			int index;
-			init_ifindex(if_name,raw_send_fd,index);
-			//init_ifindex(if_name);
-			memset(&send_info.addr_ll, 0, sizeof(send_info.addr_ll));
-			send_info.addr_ll.sll_family = AF_PACKET;
-			send_info.addr_ll.sll_ifindex =index;
-			send_info.addr_ll.sll_halen = ETHER_ADDR_LEN;
-			send_info.addr_ll.sll_protocol = htons(ETH_P_IP);
-			memcpy(&send_info.addr_ll.sll_addr, dest_hw_addr, ETHER_ADDR_LEN);
-			mylog(log_info,"we are running at lower-level (manual) mode\n");
-		}
-		else
-		{
-			u32_t dest_ip;
-			string if_name_string;
-			string hw_string;
-			assert(remote_addr.get_type()==AF_INET);
-
-			if(retry_on_error==0)
-			{
-				if(find_lower_level_info(remote_addr.inner.ipv4.sin_addr.s_addr,dest_ip,if_name_string,hw_string)!=0)
-				{
-					mylog(log_fatal,"auto detect lower-level info failed for %s,specific it manually\n",remote_addr.get_ip());
-					myexit(-1);
-				}
-			}
-			else
-			{
-				int ok=0;
-				while(!ok)
-				{
-					if(find_lower_level_info(remote_addr.inner.ipv4.sin_addr.s_addr,dest_ip,if_name_string,hw_string)!=0)
-					{
-						mylog(log_warn,"auto detect lower-level info failed for %s,retry in %d seconds\n",remote_addr.get_ip(),retry_on_error_interval);
-						sleep(retry_on_error_interval);
-					}
-					else
-					{
-						ok=1;
-					}
-
-				}
-			}
-			mylog(log_info,"we are running at lower-level (auto) mode,%s %s %s\n",my_ntoa(dest_ip),if_name_string.c_str(),hw_string.c_str());
-
-			u32_t hw[6];
-			memset(hw, 0, sizeof(hw));
-			sscanf(hw_string.c_str(), "%x:%x:%x:%x:%x:%x",&hw[0], &hw[1], &hw[2],
-					&hw[3], &hw[4], &hw[5]);
-
-			mylog(log_warn,
-					"make sure this is correct:   if_name=<%s>  dest_mac_adress=<%02x:%02x:%02x:%02x:%02x:%02x>  \n",
-					if_name_string.c_str(), hw[0], hw[1], hw[2], hw[3], hw[4], hw[5]);
-			for (int i = 0; i < 6; i++) {
-				dest_hw_addr[i] = uint8_t(hw[i]);
-			}
-
-			//mylog(log_fatal,"--lower-level auto for client hasnt been implemented\n");
-			int index;
-			init_ifindex(if_name_string.c_str(),raw_send_fd,index);
-
-			memset(&send_info.addr_ll, 0, sizeof(send_info.addr_ll));
-			send_info.addr_ll.sll_family = AF_PACKET;
-			send_info.addr_ll.sll_ifindex = index;
-			send_info.addr_ll.sll_halen = ETHER_ADDR_LEN;
-			send_info.addr_ll.sll_protocol = htons(ETH_P_IP);
-			memcpy(&send_info.addr_ll.sll_addr, dest_hw_addr, ETHER_ADDR_LEN);
-			//mylog(log_info,"we are running at lower-level (manual) mode\n");
-		}
-
-	}
-	
-	/*
-
-	address_t new_addr;
-
-	if(!force_source_ip)
-	{
-		mylog(log_info,"get_src_adress called\n");
-		if(retry_on_error==0)
-		{
-			if(get_src_adress2(new_addr,remote_addr)!=0)
-			{
-				mylog(log_fatal,"the trick to auto get source ip failed, maybe you dont have internet access\n");
-				myexit(-1);
-			}
-		}
-		else
-		{
-			int ok=0;
-			while(!ok)
-			{
-				if(get_src_adress2(new_addr,remote_addr)!=0)
-				{
-					mylog(log_warn,"the trick to auto get source ip failed, maybe you dont have internet access, retry in %d seconds\n",retry_on_error_interval);
-					sleep(retry_on_error_interval);
-				}
-				else
-				{
-					ok=1;
-				}
-
-			}
-		}
-
-	}
-	else
-	{
-		new_addr=source_addr;
-	}
-	//in_addr tmp;
-	//tmp.s_addr=source_ip_uint32;
-	mylog(log_info,"source ip = %s\n",new_addr.get_ip());*/
-	//printf("done\n");
-
-
-	/*
-	if(try_to_list_and_bind(bind_fd,local_ip_uint32,source_port)!=0)
-	{
-		mylog(log_fatal,"bind to source_port:%d fail\n ",source_port);
-		myexit(-1);
-	}*/
-	send_info.src_port=0;
-	memset(&send_info.new_src_ip,0,sizeof(send_info.new_src_ip));
-
-	int i, j, k;int ret;
-
-
-	//init_filter(source_port);
-
-	send_info.new_dst_ip.from_address_t(remote_addr);
-
-	send_info.dst_port=remote_addr.get_port();
-
-	//g_packet_info.src_ip=source_address_uint32;
-	//g_packet_info.src_port=source_port;
-
-    udp_fd=socket(local_addr.get_type(), SOCK_DGRAM, IPPROTO_UDP);
-    set_buf_size(udp_fd,socket_buf_size);
-
-	int yes = 1;
-	//setsockopt(udp_fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
-
-	//struct sockaddr_in local_me={0};
-
-	//socklen_t slen = sizeof(sockaddr_in);
-	//memset(&local_me, 0, sizeof(local_me));
-	//local_me.sin_family = AF_INET;
-	//local_me.sin_port = local_addr.get_type();
-	//local_me.sin_addr.s_addr = local_addr.inner.ipv4.sin_addr.s_addr;
-
-
-	if (bind(udp_fd, (struct sockaddr*) &local_addr.inner, local_addr.get_len()) == -1) {
-		mylog(log_fatal,"socket bind error\n");
-		//perror("socket bind error");
-		myexit(1);
-	}
-	setnonblocking(udp_fd);
-	epollfd = epoll_create1(0);
-
-	const int max_events = 4096;
-	struct epoll_event ev, events[max_events];
-	if (epollfd < 0) {
-		mylog(log_fatal,"epoll return %d\n", epollfd);
-		myexit(-1);
-	}
-
-	ev.events = EPOLLIN;
-	ev.data.u64 = udp_fd;
-	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, udp_fd, &ev);
-	if (ret!=0) {
-		mylog(log_fatal,"add  udp_listen_fd error\n");
-		myexit(-1);
-	}
-	ev.events = EPOLLIN;
-	ev.data.u64 = raw_recv_fd;
-
-	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
-	if (ret!= 0) {
-		mylog(log_fatal,"add raw_fd error\n");
-		myexit(-1);
-	}
-
-	////add_timer for fake_tcp_keep_connection_client
-
-	//sleep(10);
-
-	//memset(&udp_old_addr_in,0,sizeof(sockaddr_in));
-	int unbind=1;
-
-	set_timer(epollfd,timer_fd);
-
-	mylog(log_debug,"send_raw : from %s %d  to %s %d\n",send_info.new_src_ip.get_str1(),send_info.src_port,send_info.new_dst_ip.get_str2(),send_info.dst_port);
-	int fifo_fd=-1;
-
-	if(fifo_file[0]!=0)
-	{
-		fifo_fd=create_fifo(fifo_file);
-		ev.events = EPOLLIN;
-		ev.data.u64 = fifo_fd;
-
-		ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, fifo_fd, &ev);
-		if (ret!= 0) {
-			mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
-			myexit(-1);
-		}
-		mylog(log_info,"fifo_file=%s\n",fifo_file);
-	}
-	while(1)////////////////////////
-	{
-		if(about_to_exit) myexit(0);
-		epoll_trigger_counter++;
-		int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
-		if (nfds < 0) {  //allow zero
-			if(errno==EINTR  )
-			{
-				mylog(log_info,"epoll interrupted by signal,continue\n");
-				//close(fifo_fd);
-				//myexit(0);
-			}
-			else
-			{
-				mylog(log_fatal,"epoll_wait return %d,%s\n", nfds,strerror(errno));
-				myexit(-1);
-			}
-		}
-		int idx;
-		for (idx = 0; idx < nfds; ++idx) {
-			if (events[idx].data.u64 == (u64_t)raw_recv_fd)
-			{
-				//iphdr *iph;tcphdr *tcph;
-				client_on_raw_recv(conn_info);
-			}
-			else if(events[idx].data.u64 ==(u64_t)timer_fd)
-			{
-				u64_t value;
-				int unused=read(timer_fd, &value, 8);
-				client_on_timer(conn_info);
-				mylog(log_trace,"epoll_trigger_counter:  %d \n",epoll_trigger_counter);
-				epoll_trigger_counter=0;
-			}
-			else if (events[idx].data.u64 == (u64_t)udp_fd)
-			{
-				client_on_udp_recv(conn_info);
-			}
-			else if (events[idx].data.u64 == (u64_t)fifo_fd)
-			{
-				int len=read (fifo_fd, buf, sizeof (buf));
-				//assert(len>=0);
-				if(len<0)
-				{
-					mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
-					continue;
-				}
-				buf[len]=0;
-				while(len>=1&&buf[len-1]=='\n')
-					buf[len-1]=0;
-				mylog(log_info,"got data from fifo,len=%d,s=[%s]\n",len,buf);
-				if(strcmp(buf,"reconnect")==0)
-				{
-					mylog(log_info,"received command: reconnect\n");
-					conn_info.state.client_current_state=client_idle;
-					conn_info.my_id=get_true_random_number_nz();
-				}
-				else
-				{
-					mylog(log_info,"unknown command\n");
-				}
-
-			}
-			else
-			{
-				mylog(log_fatal,"unknown fd,this should never happen\n");
-				myexit(-1);
-			}
-		}
-	}
-	return 0;
-}
-
-int server_event_loop()
-{
-	char buf[buf_len];
-
-	int i, j, k;int ret;
-
-	if(raw_ip_version==AF_INET)
-	{
-		if(local_addr.inner.ipv4.sin_addr.s_addr!=0)
-		{
-			bind_addr_used=1;
-			bind_addr.v4=local_addr.inner.ipv4.sin_addr.s_addr;
-		}
-	}
-	else
-	{
-		assert(raw_ip_version==AF_INET6);
-		char zero_arr[16]={0};
-		if(memcmp(&local_addr.inner.ipv6.sin6_addr,zero_arr,16)!=0)
-		{
-			bind_addr_used=1;
-			bind_addr.v6=local_addr.inner.ipv6.sin6_addr;
-		}
-	}
-	//bind_address_uint32=local_ip_uint32;//only server has bind adress,client sets it to zero
-
-	if(lower_level)
-	{
-		if(lower_level_manual)
-		{
-			init_ifindex(if_name,raw_send_fd,ifindex);
-			mylog(log_info,"we are running at lower-level (manual) mode\n");
-		}
-		else
-		{
-			mylog(log_info,"we are running at lower-level (auto) mode\n");
-		}
-
-	}
-
-	 if(raw_mode==mode_faketcp)
-	 {
-		 bind_fd=socket(local_addr.get_type(),SOCK_STREAM,0);
-	 }
-	 else  if(raw_mode==mode_udp||raw_mode==mode_icmp)//bind an adress to avoid collision,for icmp,there is no port,just bind a udp port
-	 {
-		 bind_fd=socket(local_addr.get_type(),SOCK_DGRAM,0);
-	 }
-
-	 //struct sockaddr_in temp_bind_addr={0};
-    // bzero(&temp_bind_addr, sizeof(temp_bind_addr));
-
-     //temp_bind_addr.sin_family = AF_INET;
-     //temp_bind_addr.sin_port = local_addr.get_port();
-     //temp_bind_addr.sin_addr.s_addr = local_addr.inner.ipv4.sin_addr.s_addr;
-
-     if (bind(bind_fd, (struct sockaddr*)&local_addr.inner, local_addr.get_len()) !=0)
-     {
-    	 mylog(log_fatal,"bind fail\n");
-    	 myexit(-1);
-     }
-
-	 if(raw_mode==mode_faketcp)
-	 {
-
-		 if(listen(bind_fd, SOMAXCONN) != 0 )
-		 {
-			 mylog(log_fatal,"listen fail\n");
-			 myexit(-1);
-		 }
-	 }
-
-
-
-	//init_raw_socket();
-	init_filter(local_addr.get_port());//bpf filter
-
-	epollfd = epoll_create1(0);
-	const int max_events = 4096;
-
-	struct epoll_event ev, events[max_events];
-	if (epollfd < 0) {
-		mylog(log_fatal,"epoll return %d\n", epollfd);
-		myexit(-1);
-	}
-
-	ev.events = EPOLLIN;
-	ev.data.u64 = raw_recv_fd;
-
-	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
-	if (ret!= 0) {
-		mylog(log_fatal,"add raw_fd error\n");
-		myexit(-1);
-	}
-	int timer_fd;
-
-	set_timer(epollfd,timer_fd);
-
-	u64_t begin_time=0;
-	u64_t end_time=0;
-
-	mylog(log_info,"now listening at %s\n",local_addr.get_str());
-
-	int fifo_fd=-1;
-
-	if(fifo_file[0]!=0)
-	{
-		fifo_fd=create_fifo(fifo_file);
-		ev.events = EPOLLIN;
-		ev.data.u64 = fifo_fd;
-
-		ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, fifo_fd, &ev);
-		if (ret!= 0) {
-			mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
-			myexit(-1);
-		}
-		mylog(log_info,"fifo_file=%s\n",fifo_file);
-	}
-
-
-	while(1)////////////////////////
-	{
-
-		if(about_to_exit) myexit(0);
-
-		int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
-		if (nfds < 0) {  //allow zero
-			if(errno==EINTR  )
-			{
-				mylog(log_info,"epoll interrupted by signal,continue\n");
-				//myexit(0);
-			}
-			else
-			{
-				mylog(log_fatal,"epoll_wait return %d,%s\n", nfds,strerror(errno));
-				myexit(-1);
-			}
-		}
-		int idx;
-		for (idx = 0; idx < nfds; ++idx)
-		{
-			//mylog(log_debug,"ndfs:  %d \n",nfds);
-			epoll_trigger_counter++;
-			//printf("%d %d %d %d\n",timer_fd,raw_recv_fd,raw_send_fd,n);
-			if ((events[idx].data.u64 ) == (u64_t)timer_fd)
-			{
-				if(debug_flag)begin_time=get_current_time();
-				conn_manager.clear_inactive();
-				u64_t dummy;
-				int unused=read(timer_fd, &dummy, 8);
-				//current_time_rough=get_current_time();
-				if(debug_flag)
-				{
-					end_time=get_current_time();
-					mylog(log_debug,"timer_fd,%llu,%llu,%llu\n",begin_time,end_time,end_time-begin_time);
-				}
-
-				mylog(log_trace,"epoll_trigger_counter:  %d \n",epoll_trigger_counter);
-				epoll_trigger_counter=0;
-
-			}
-			else if (events[idx].data.u64 == (u64_t)raw_recv_fd)
-			{
-				if(debug_flag)begin_time=get_current_time();
-				server_on_raw_recv_multi();
-				if(debug_flag)
-				{
-					end_time=get_current_time();
-					mylog(log_debug,"raw_recv_fd,%llu,%llu,%llu  \n",begin_time,end_time,end_time-begin_time);
-				}
-			}
-			else if (events[idx].data.u64 == (u64_t)fifo_fd)
-			{
-				int len=read (fifo_fd, buf, sizeof (buf));
-				if(len<0)
-				{
-					mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
-					continue;
-				}
-				//assert(len>=0);
-				buf[len]=0;
-				while(len>=1&&buf[len-1]=='\n')
-					buf[len-1]=0;
-				mylog(log_info,"got data from fifo,len=%d,s=[%s]\n",len,buf);
-				mylog(log_info,"unknown command\n");
-			}
-			else if (events[idx].data.u64>u32_t(-1) )
-			{
-
-				fd64_t fd64=events[idx].data.u64;
-				if(!fd_manager.exist(fd64))
-				{
-					mylog(log_trace ,"fd64 no longer exist\n");
-					return -1;
-				}
-				assert(fd_manager.exist_info(fd64));
-				conn_info_t* p_conn_info=fd_manager.get_info(fd64).p_conn_info;
-				conn_info_t &conn_info=*p_conn_info;
-				if(fd64==conn_info.timer_fd64)//////////timer_fd64
-				{
-
-					if(debug_flag)begin_time=get_current_time();
-					int fd=fd_manager.to_fd(fd64);
-					u64_t dummy;
-					int unused=read(fd, &dummy, 8);
-					assert(conn_info.state.server_current_state == server_ready); //TODO remove this for peformance
-					server_on_timer_multi(conn_info);
-					if(debug_flag)
-					{
-						end_time=get_current_time();
-						mylog(log_debug,"(events[idx].data.u64 >>32u) == 2u ,%llu,%llu,%llu  \n",begin_time,end_time,end_time-begin_time);
-					}
-				}
-				else//udp_fd64
-				{
-					if(debug_flag)begin_time=get_current_time();
-					server_on_udp_recv(conn_info,fd64);
-					if(debug_flag)
-					{
-						end_time=get_current_time();
-						mylog(log_debug,"(events[idx].data.u64 >>32u) == 1u,%lld,%lld,%lld  \n",begin_time,end_time,end_time-begin_time);
-					}
-				}
-			}
-			else
-			{
-				mylog(log_fatal,"unknown fd,this should never happen\n");
-				myexit(-1);
-			}
-
-		}
-	}
-	return 0;
-}
-
+int client_event_loop();
+int server_event_loop();
 /*
 int test()
 {
diff --git a/makefile b/makefile
index c73278c..83307e5 100755
--- a/makefile
+++ b/makefile
@@ -10,7 +10,7 @@ cc_arm= /toolchains/arm-2014.05/bin/arm-none-linux-gnueabi-g++
 #cc_bcm2708=/home/wangyu/raspberry/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-g++ 
 FLAGS= -std=c++11 -Wall -Wextra -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers ${OPT}
 
-COMMON=main.cpp lib/md5.cpp lib/pbkdf2-sha1.cpp lib/pbkdf2-sha256.cpp encrypt.cpp log.cpp network.cpp common.cpp  connection.cpp misc.cpp fd_manager.cpp -lpthread
+COMMON=main.cpp lib/md5.cpp lib/pbkdf2-sha1.cpp lib/pbkdf2-sha256.cpp encrypt.cpp log.cpp network.cpp common.cpp  connection.cpp misc.cpp fd_manager.cpp client.cpp server.cpp -lpthread
 SOURCES= $(COMMON) lib/aes_faster_c/aes.cpp lib/aes_faster_c/wrapper.cpp
 SOURCES_TINY_AES= $(COMMON) lib/aes.c
 SOURCES_AES_ACC=$(COMMON) $(wildcard lib/aes_acc/aes*.c)
diff --git a/misc.cpp b/misc.cpp
index 64a6411..641c161 100644
--- a/misc.cpp
+++ b/misc.cpp
@@ -16,6 +16,9 @@
 int hb_mode=1;
 int hb_len=1200;
 
+char hb_buf[buf_len];
+
+
 int mtu_warn=1375;//if a packet larger than mtu warn is receviced,there will be a warning
 
 int max_rst_to_show=15;
diff --git a/misc.h b/misc.h
index 70dca15..b8f5c50 100644
--- a/misc.h
+++ b/misc.h
@@ -15,6 +15,8 @@
 
 extern int hb_mode;
 extern int hb_len;
+extern char hb_buf[buf_len];
+
 extern int mtu_warn;
 
 extern int max_rst_allowed;
diff --git a/server.cpp b/server.cpp
new file mode 100644
index 0000000..f42e68d
--- /dev/null
+++ b/server.cpp
@@ -0,0 +1,901 @@
+/*
+ * server.cpp
+ *
+ *  Created on: Aug 29, 2018
+ *      Author: root
+ */
+
+
+#include "common.h"
+#include "network.h"
+#include "connection.h"
+#include "misc.h"
+#include "log.h"
+#include "lib/md5.h"
+#include "encrypt.h"
+#include "fd_manager.h"
+
+int server_easytcp=0;//currently only for test
+
+int server_on_timer_multi(conn_info_t &conn_info)  //for server. called when a timer is ready in epoll.for server,there will be one timer for every connection
+// there is also a global timer for server,but its not handled here
+{
+	char ip_port[40];
+	//u32_t ip=conn_info.raw_info.send_info.dst_ip;
+	//u32_t port=conn_info.raw_info.send_info.dst_port;
+
+	address_t tmp_addr;
+	tmp_addr.from_ip_port_new(raw_ip_version,&conn_info.raw_info.send_info.new_dst_ip,conn_info.raw_info.send_info.dst_port);
+	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
+	tmp_addr.to_str(ip_port);
+
+	//keep_iptables_rule();
+	mylog(log_trace,"server timer!\n");
+	raw_info_t &raw_info=conn_info.raw_info;
+
+	assert(conn_info.state.server_current_state==server_ready);
+
+
+	if(conn_info.state.server_current_state==server_ready)
+	{
+		conn_info.blob->conv_manager.s.clear_inactive(ip_port);
+		/*
+		if( get_current_time()-conn_info.last_hb_recv_time>heartbeat_timeout )
+		{
+			mylog(log_trace,"%lld %lld\n",get_current_time(),conn_info.last_state_time);
+			conn_info.server_current_state=server_nothing;
+
+			//conn_manager.current_ready_ip=0;
+			//conn_manager.current_ready_port=0;
+
+			mylog(log_info,"changed state to server_nothing\n");
+			return 0;
+		}*/  //dont need to do this at server,conn_manger will clear expired connections
+
+		if(get_current_time()-conn_info.last_hb_sent_time<heartbeat_interval)
+		{
+			return 0;
+		}
+
+		if(hb_mode==0)
+			send_safer(conn_info,'h',hb_buf,0);  /////////////send
+		else
+			send_safer(conn_info,'h',hb_buf,hb_len);
+		conn_info.last_hb_sent_time=get_current_time();
+
+		mylog(log_debug,"heart beat sent<%x,%x>\n",conn_info.my_id,conn_info.oppsite_id);
+	}
+	else
+	{
+		mylog(log_fatal,"this shouldnt happen!\n");
+		myexit(-1);
+	}
+	return 0;
+
+}
+int server_on_raw_recv_ready(conn_info_t &conn_info,char * ip_port,char type,char *data,int data_len)  //called while the state for a connection is server_ready
+//receives data and heart beat by recv_safer.
+{
+
+	raw_info_t &raw_info = conn_info.raw_info;
+	packet_info_t &send_info = conn_info.raw_info.send_info;
+	packet_info_t &recv_info = conn_info.raw_info.recv_info;
+	//char ip_port[40];
+
+	//sprintf(ip_port,"%s:%d",my_ntoa(recv_info.src_ip),recv_info.src_port);
+
+
+/*
+	if (recv_info.src_ip != send_info.dst_ip
+			|| recv_info.src_port != send_info.dst_port) {
+		mylog(log_debug, "unexpected adress\n");
+		return 0;
+	}*/
+
+	if (type == 'h' && data_len >= 0) {
+		//u32_t tmp = ntohl(*((u32_t *) &data[sizeof(u32_t)]));
+		mylog(log_debug,"[%s][hb]received hb \n",ip_port);
+		conn_info.last_hb_recv_time = get_current_time();
+		return 0;
+	} else if (type== 'd' && data_len >=int( sizeof(u32_t) ))
+	{
+
+		//u32_t tmp_conv_id = ntohl(*((u32_t *) &data[0]));
+		my_id_t tmp_conv_id;
+		memcpy(&tmp_conv_id,&data[0],sizeof(tmp_conv_id));
+		tmp_conv_id=ntohl(tmp_conv_id);
+
+
+		if(hb_mode==0)
+			conn_info.last_hb_recv_time = get_current_time();
+
+		mylog(log_trace, "conv:%u\n", tmp_conv_id);
+		if (!conn_info.blob->conv_manager.s.is_conv_used(tmp_conv_id)) {
+			if (conn_info.blob->conv_manager.s.get_size() >= max_conv_num) {
+				mylog(log_warn,
+						"[%s]ignored new conv %x connect bc max_conv_num exceed\n",ip_port,
+						tmp_conv_id);
+				return 0;
+			}
+
+			/*
+			struct sockaddr_in remote_addr_in={0};
+
+			socklen_t slen = sizeof(sockaddr_in);
+			//memset(&remote_addr_in, 0, sizeof(remote_addr_in));
+			remote_addr_in.sin_family = AF_INET;
+			remote_addr_in.sin_port = htons(remote_port);
+			remote_addr_in.sin_addr.s_addr = remote_ip_uint32;
+
+
+
+			int new_udp_fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+
+			if (new_udp_fd < 0) {
+				mylog(log_warn, "[%s]create udp_fd error\n",ip_port);
+				return -1;
+			}
+			setnonblocking(new_udp_fd);
+			set_buf_size(new_udp_fd,socket_buf_size);
+
+			mylog(log_debug, "[%s]created new udp_fd %d\n",ip_port, new_udp_fd);
+			int ret = connect(new_udp_fd, (struct sockaddr *) &remote_addr_in,
+					slen);
+			if (ret != 0) {
+				mylog(log_warn, "udp fd connect fail\n");
+				close(new_udp_fd);
+				return -1;
+			}*/
+
+			int new_udp_fd=remote_addr.new_connected_udp_fd();
+			if (new_udp_fd < 0) {
+				mylog(log_warn, "[%s]new_connected_udp_fd() failed\n",ip_port);
+				return -1;
+			}
+
+			struct epoll_event ev;
+
+			fd64_t new_udp_fd64 =  fd_manager.create(new_udp_fd);
+			fd_manager.get_info(new_udp_fd64).p_conn_info=&conn_info;
+
+			mylog(log_trace, "[%s]u64: %lld\n",ip_port, new_udp_fd64);
+			ev.events = EPOLLIN;
+
+			ev.data.u64 = new_udp_fd64;
+
+			int ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, new_udp_fd, &ev);
+
+			if (ret != 0) {
+				mylog(log_warn, "[%s]add udp_fd error\n",ip_port);
+				close(new_udp_fd);
+				return -1;
+			}
+
+			conn_info.blob->conv_manager.s.insert_conv(tmp_conv_id, new_udp_fd64);
+
+
+
+			//assert(conn_manager.udp_fd_mp.find(new_udp_fd)==conn_manager.udp_fd_mp.end());
+
+			//conn_manager.udp_fd_mp[new_udp_fd] = &conn_info;
+
+			//pack_u64(conn_info.raw_info.recv_info.src_ip,conn_info.raw_info.recv_info.src_port);
+
+			mylog(log_info, "[%s]new conv conv_id=%x, assigned fd=%d\n",ip_port,
+					tmp_conv_id, new_udp_fd);
+
+
+
+		}
+
+		fd64_t fd64 = conn_info.blob->conv_manager.s.find_data_by_conv(tmp_conv_id);
+
+		conn_info.blob->conv_manager.s.update_active_time(tmp_conv_id);
+
+		int fd = fd_manager.to_fd(fd64);
+
+		mylog(log_trace, "[%s]received a data from fake tcp,len:%d\n",ip_port, data_len);
+		int ret = send(fd, data + sizeof(u32_t),
+				data_len - ( sizeof(u32_t)), 0);
+
+		mylog(log_trace, "[%s]%d byte sent  ,fd :%d\n ",ip_port, ret, fd);
+		if (ret < 0) {
+			mylog(log_warn, "send returned %d\n", ret);
+			//perror("what happened????");
+		}
+		return 0;
+	}
+	return 0;
+}
+
+int server_on_raw_recv_pre_ready(conn_info_t &conn_info,char * ip_port,u32_t tmp_oppsite_const_id)// do prepare work before state change to server ready for a specifc connection
+//connection recovery is also handle here
+{
+	//u32_t ip;uint16_t port;
+	//ip=conn_info.raw_info.recv_info.src_ip;
+	//port=conn_info.raw_info.recv_info.src_port;
+	//char ip_port[40];
+	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
+
+	mylog(log_info,"[%s]received handshake oppsite_id:%x  my_id:%x\n",ip_port,conn_info.oppsite_id,conn_info.my_id);
+
+	mylog(log_info,"[%s]oppsite const_id:%x \n",ip_port,tmp_oppsite_const_id);
+	if(conn_manager.const_id_mp.find(tmp_oppsite_const_id)==conn_manager.const_id_mp.end())
+	{
+		//conn_manager.const_id_mp=
+
+		if(conn_manager.ready_num>=max_ready_conn_num)
+		{
+			mylog(log_info,"[%s]max_ready_conn_num,cant turn to ready\n",ip_port);
+			conn_info.state.server_current_state =server_idle;
+			return 0;
+		}
+
+		conn_info.prepare();
+		conn_info.state.server_current_state = server_ready;
+		conn_info.oppsite_const_id=tmp_oppsite_const_id;
+		conn_manager.ready_num++;
+		conn_manager.const_id_mp[tmp_oppsite_const_id]=&conn_info;
+
+
+		//conn_info.last_state_time=get_current_time(); //dont change this!!!!!!!!!!!!!!!!!!!!!!!!!
+
+		//conn_manager.current_ready_ip=ip;
+		//conn_manager.current_ready_port=port;
+
+		//my_id=conn_info.my_id;
+		//oppsite_id=conn_info.oppsite_id;
+		conn_info.last_hb_recv_time = get_current_time();
+
+		conn_info.last_hb_sent_time = conn_info.last_hb_recv_time;//=get_current_time()
+
+		if(hb_mode==0)
+			send_safer(conn_info,'h',hb_buf,0);/////////////send
+		else
+			send_safer(conn_info,'h',hb_buf,hb_len);
+
+		mylog(log_info, "[%s]changed state to server_ready\n",ip_port);
+		conn_info.blob->anti_replay.re_init();
+
+		//g_conn_info=conn_info;
+		int new_timer_fd;
+		set_timer_server(epollfd, new_timer_fd,conn_info.timer_fd64);
+
+		fd_manager.get_info(conn_info.timer_fd64).p_conn_info=&conn_info;
+		//assert(conn_manager.timer_fd_mp.find(new_timer_fd)==conn_manager.timer_fd_mp.end());
+		//conn_manager.timer_fd_mp[new_timer_fd] = &conn_info;//pack_u64(ip,port);
+
+
+		//timer_fd_mp[new_timer_fd]
+		/*
+		 if(oppsite_const_id!=0&&tmp_oppsite_const_id!=oppsite_const_id)  //TODO MOVE TO READY
+		 {
+		 mylog(log_info,"cleared all conv bc of const id doesnt match\n");
+		 conv_manager.clear();
+		 }*/
+		//oppsite_const_id=tmp_oppsite_const_id;
+	}
+	else
+	{
+
+		conn_info_t &ori_conn_info=*conn_manager.const_id_mp[tmp_oppsite_const_id];
+
+		if(ori_conn_info.state.server_current_state==server_ready)
+		{
+			if(conn_info.last_state_time<ori_conn_info.last_state_time)
+			{
+				 mylog(log_info,"[%s]conn_info.last_state_time<ori_conn_info.last_state_time. ignored new handshake\n",ip_port);
+				 conn_info.state.server_current_state=server_idle;
+				 conn_info.oppsite_const_id=0;
+				 return 0;
+			}
+			address_t addr1;addr1.from_ip_port_new(raw_ip_version,&ori_conn_info.raw_info.recv_info.new_src_ip,ori_conn_info.raw_info.recv_info.src_port);
+			if(!conn_manager.exist(addr1))//TODO remove this
+			{
+				mylog(log_fatal,"[%s]this shouldnt happen\n",ip_port);
+				myexit(-1);
+			}
+			address_t addr2;addr2.from_ip_port_new(raw_ip_version,&conn_info.raw_info.recv_info.new_src_ip,conn_info.raw_info.recv_info.src_port);
+			if(!conn_manager.exist(addr2))//TODO remove this
+			{
+				mylog(log_fatal,"[%s]this shouldnt happen2\n",ip_port);
+				myexit(-1);
+			}
+			conn_info_t *&p_ori=conn_manager.find_insert_p(addr1);
+			conn_info_t *&p=conn_manager.find_insert_p(addr2);
+			conn_info_t *tmp=p;
+			p=p_ori;
+			p_ori=tmp;
+
+
+			mylog(log_info,"[%s]grabbed a connection\n",ip_port);
+
+
+			//ori_conn_info.state.server_current_state=server_ready;
+			ori_conn_info.recover(conn_info);
+
+			//send_safer(ori_conn_info, 'h',hb_buf, hb_len);
+			//ori_conn_info.blob->anti_replay.re_init();
+			if(hb_mode==0)
+				send_safer(ori_conn_info,'h',hb_buf,0);/////////////send
+			else
+				send_safer(ori_conn_info,'h',hb_buf,hb_len);
+
+			ori_conn_info.last_hb_recv_time=get_current_time();
+
+
+
+			conn_info.state.server_current_state=server_idle;
+			conn_info.oppsite_const_id=0;
+
+		}
+		else
+		{
+			mylog(log_fatal,"[%s]this should never happen\n",ip_port);
+			myexit(-1);
+		}
+		return 0;
+	}
+	return 0;
+}
+int server_on_raw_recv_handshake1(conn_info_t &conn_info,char * ip_port,char * data, int data_len)//called when server received a handshake1 packet from client
+{
+	packet_info_t &send_info=conn_info.raw_info.send_info;
+	packet_info_t &recv_info=conn_info.raw_info.recv_info;
+	raw_info_t &raw_info=conn_info.raw_info;
+
+	//u32_t ip=conn_info.raw_info.recv_info.src_ip;
+	//uint16_t port=conn_info.raw_info.recv_info.src_port;
+
+	//char ip_port[40];
+	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
+
+	if(data_len<int( 3*sizeof(my_id_t)))
+	{
+		mylog(log_debug,"[%s] data_len=%d too short to be a handshake\n",ip_port,data_len);
+		return -1;
+	}
+	//id_t tmp_oppsite_id=  ntohl(* ((u32_t *)&data[0]));
+	my_id_t tmp_oppsite_id;
+	memcpy(&tmp_oppsite_id,(u32_t *)&data[0],sizeof(tmp_oppsite_id));
+	tmp_oppsite_id=ntohl(tmp_oppsite_id);
+
+	//id_t tmp_my_id=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
+	my_id_t tmp_my_id;
+	memcpy(&tmp_my_id,&data[sizeof(my_id_t)],sizeof(tmp_my_id));
+	tmp_my_id=ntohl(tmp_my_id);
+
+	if(tmp_my_id==0)  //received  init handshake again
+	{
+		if(raw_mode==mode_faketcp)
+		{
+			send_info.seq=recv_info.ack_seq;
+			send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
+			send_info.ts_ack=recv_info.ts;
+		}
+		if(raw_mode==mode_icmp)
+		{
+			send_info.my_icmp_seq=recv_info.my_icmp_seq;
+		}
+		send_handshake(raw_info,conn_info.my_id,tmp_oppsite_id,const_id);  //////////////send
+
+		mylog(log_info,"[%s]changed state to server_handshake1,my_id is %x\n",ip_port,conn_info.my_id);
+	}
+	else if(tmp_my_id==conn_info.my_id)
+	{
+		conn_info.oppsite_id=tmp_oppsite_id;
+		//id_t tmp_oppsite_const_id=ntohl(* ((u32_t *)&data[sizeof(id_t)*2]));
+
+		my_id_t tmp_oppsite_const_id;
+		memcpy(&tmp_oppsite_const_id,&data[sizeof(my_id_t)*2],sizeof(tmp_oppsite_const_id));
+		tmp_oppsite_const_id=ntohl(tmp_oppsite_const_id);
+
+
+		if(raw_mode==mode_faketcp)
+		{
+			send_info.seq=recv_info.ack_seq;
+			send_info.ack_seq=recv_info.seq+raw_info.recv_info.data_len;
+			send_info.ts_ack=recv_info.ts;
+		}
+
+		if(raw_mode==mode_icmp)
+		{
+			send_info.my_icmp_seq=recv_info.my_icmp_seq;
+		}
+
+		server_on_raw_recv_pre_ready(conn_info,ip_port,tmp_oppsite_const_id);
+
+	}
+	else
+	{
+		mylog(log_debug,"[%s]invalid my_id %x,my_id is %x\n",ip_port,tmp_my_id,conn_info.my_id);
+	}
+	return 0;
+}
+
+int server_on_raw_recv_multi() //called when server received an raw packet
+{
+	char dummy_buf[buf_len];
+	raw_info_t peek_raw_info;
+	peek_raw_info.peek=1;
+	packet_info_t &peek_info=peek_raw_info.recv_info;
+	mylog(log_trace,"got a packet\n");
+	if(pre_recv_raw_packet()<0) return -1;
+	if(peek_raw(peek_raw_info)<0)
+	{
+		discard_raw_packet();
+		//recv(raw_recv_fd, 0,0, 0  );//
+		//struct sockaddr saddr;
+		//socklen_t saddr_size=sizeof(saddr);
+		///recvfrom(raw_recv_fd, 0,0, 0 ,&saddr , &saddr_size);//
+		mylog(log_trace,"peek_raw failed\n");
+		return -1;
+	}else
+	{
+		mylog(log_trace,"peek_raw success\n");
+	}
+	//u32_t ip=peek_info.src_ip;uint16_t port=peek_info.src_port;
+
+
+	int data_len; char *data;
+
+	address_t addr;
+	addr.from_ip_port_new(raw_ip_version,&peek_info.new_src_ip,peek_info.src_port);
+
+	char ip_port[40];
+	addr.to_str(ip_port);
+	//sprintf(ip_port,"%s:%d",my_ntoa(ip),port);
+	mylog(log_trace,"[%s]peek_raw\n",ip_port);
+
+	if(raw_mode==mode_faketcp&&peek_info.syn==1)
+	{
+		if(!conn_manager.exist(addr)||conn_manager.find_insert(addr).state.server_current_state!=server_ready)
+		{//reply any syn ,before state become ready
+
+			raw_info_t tmp_raw_info;
+			if(recv_raw0(tmp_raw_info,data,data_len)<0)
+			{
+				return 0;
+			}
+			if(server_easytcp!=0)
+				return 0;
+			raw_info_t &raw_info=tmp_raw_info;
+			packet_info_t &send_info=raw_info.send_info;
+			packet_info_t &recv_info=raw_info.recv_info;
+
+			send_info.new_src_ip=recv_info.new_dst_ip;
+			send_info.src_port=recv_info.dst_port;
+
+			send_info.dst_port = recv_info.src_port;
+			send_info.new_dst_ip = recv_info.new_src_ip;
+
+			if(lower_level)
+			{
+				handle_lower_level(raw_info);
+			}
+
+			if(data_len==0&&raw_info.recv_info.syn==1&&raw_info.recv_info.ack==0)
+			{
+				send_info.ack_seq = recv_info.seq + 1;
+
+				send_info.psh = 0;
+				send_info.syn = 1;
+				send_info.ack = 1;
+				send_info.ts_ack=recv_info.ts;
+
+				mylog(log_info,"[%s]received syn,sent syn ack back\n",ip_port);
+				send_raw0(raw_info, 0, 0);
+				return 0;
+			}
+		}
+		else
+		{
+			discard_raw_packet();
+			//recv(raw_recv_fd, 0,0,0);
+		}
+		return 0;
+	}
+	if(!conn_manager.exist(addr))
+	{
+		if(conn_manager.mp.size()>=max_handshake_conn_num)
+		{
+			mylog(log_info,"[%s]reached max_handshake_conn_num,ignored new handshake\n",ip_port);
+			discard_raw_packet();
+			//recv(raw_recv_fd, 0,0, 0  );//
+			return 0;
+		}
+
+		raw_info_t tmp_raw_info;
+
+
+		if(raw_mode==mode_icmp)
+		{
+			tmp_raw_info.send_info.dst_port=tmp_raw_info.send_info.src_port=addr.get_port();
+		}
+		if(recv_bare(tmp_raw_info,data,data_len)<0)
+		{
+			return 0;
+		}
+		if(data_len<int( 3*sizeof(my_id_t)))
+		{
+			mylog(log_debug,"[%s]too short to be a handshake\n",ip_port);
+			return -1;
+		}
+
+		//id_t zero=ntohl(* ((u32_t *)&data[sizeof(id_t)]));
+		my_id_t zero;
+		memcpy(&zero,&data[sizeof(my_id_t)],sizeof(zero));
+		zero=ntohl(zero);
+
+		if(zero!=0)
+		{
+			mylog(log_debug,"[%s]not a invalid initial handshake\n",ip_port);
+			return -1;
+		}
+
+		mylog(log_info,"[%s]got packet from a new ip\n",ip_port);
+
+		conn_info_t &conn_info=conn_manager.find_insert(addr);
+		conn_info.raw_info=tmp_raw_info;
+		raw_info_t &raw_info=conn_info.raw_info;
+
+		packet_info_t &send_info=conn_info.raw_info.send_info;
+		packet_info_t &recv_info=conn_info.raw_info.recv_info;
+
+		//conn_info.ip_port.ip=ip;
+		//conn_info.ip_port.port=port;
+
+
+
+		send_info.new_src_ip=recv_info.new_dst_ip;
+		send_info.src_port=recv_info.dst_port;
+
+		send_info.dst_port = recv_info.src_port;
+		send_info.new_dst_ip = recv_info.new_src_ip;
+
+		if(lower_level)
+		{
+			handle_lower_level(raw_info);
+		}
+
+		//id_t tmp_oppsite_id=  ntohl(* ((u32_t *)&data[0]));
+		//mylog(log_info,"[%s]handshake1 received %x\n",ip_port,tmp_oppsite_id);
+
+		conn_info.my_id=get_true_random_number_nz();
+
+
+		mylog(log_info,"[%s]created new conn,state: server_handshake1,my_id is %x\n",ip_port,conn_info.my_id);
+
+		conn_info.state.server_current_state = server_handshake1;
+		conn_info.last_state_time = get_current_time();
+
+		server_on_raw_recv_handshake1(conn_info,ip_port,data,data_len);
+		return 0;
+	}
+
+
+
+
+	conn_info_t & conn_info=conn_manager.find_insert(addr);//insert if not exist
+	packet_info_t &send_info=conn_info.raw_info.send_info;
+	packet_info_t &recv_info=conn_info.raw_info.recv_info;
+	raw_info_t &raw_info=conn_info.raw_info;
+
+	if(conn_info.state.server_current_state==server_handshake1)
+	{
+		if(recv_bare(raw_info,data,data_len)!=0)
+		{
+			return -1;
+		}
+		return server_on_raw_recv_handshake1(conn_info,ip_port,data,data_len);
+	}
+	if(conn_info.state.server_current_state==server_ready)
+	{
+		char type;
+		//mylog(log_info,"before recv_safer\n");
+		if (recv_safer(conn_info,type, data, data_len) != 0) {
+			return -1;
+		}
+		//mylog(log_info,"after recv_safer\n");
+		return server_on_raw_recv_ready(conn_info,ip_port,type,data,data_len);
+	}
+
+	if(conn_info.state.server_current_state==server_idle)
+	{
+		discard_raw_packet();
+		//recv(raw_recv_fd, 0,0, 0  );//
+		return 0;
+	}
+	mylog(log_fatal,"we should never run to here\n");
+	myexit(-1);
+	return -1;
+}
+
+int server_on_udp_recv(conn_info_t &conn_info,fd64_t fd64)
+{
+	char buf[buf_len];
+
+	if(conn_info.state.server_current_state!=server_ready)//TODO remove this for peformance
+	{
+		mylog(log_fatal,"p_conn_info->state.server_current_state!=server_ready!!!this shouldnt happen\n");
+		myexit(-1);
+	}
+
+	//conn_info_t &conn_info=*p_conn_info;
+
+	assert(conn_info.blob->conv_manager.s.is_data_used(fd64));
+
+	u32_t conv_id=conn_info.blob->conv_manager.s.find_conv_by_data(fd64);
+
+	int fd=fd_manager.to_fd(fd64);
+
+	int recv_len=recv(fd,buf,max_data_len+1,0);
+
+	mylog(log_trace,"received a packet from udp_fd,len:%d\n",recv_len);
+
+	if(recv_len==max_data_len+1)
+	{
+		mylog(log_warn,"huge packet, data_len > %d,dropped\n",max_data_len);
+		return -1;
+	}
+
+	if(recv_len<0)
+	{
+		mylog(log_debug,"udp fd,recv_len<0 continue,%s\n",strerror(errno));
+		return -1;
+	}
+
+	if(recv_len>=mtu_warn)
+	{
+		mylog(log_warn,"huge packet,data len=%d (>=%d).strongly suggested to set a smaller mtu at upper level,to get rid of this warn\n ",recv_len,mtu_warn);
+	}
+
+	//conn_info.conv_manager->update_active_time(conv_id);  server dosnt update from upd side,only update from raw side.  (client updates at both side)
+
+	if(conn_info.state.server_current_state==server_ready)
+	{
+		send_data_safer(conn_info,buf,recv_len,conv_id);
+		//send_data(g_packet_info_send,buf,recv_len,my_id,oppsite_id,conv_id);
+		mylog(log_trace,"send_data_safer ,sent !!\n");
+	}
+
+
+	return 0;
+}
+
+
+int server_event_loop()
+{
+	char buf[buf_len];
+
+	int i, j, k;int ret;
+
+	if(raw_ip_version==AF_INET)
+	{
+		if(local_addr.inner.ipv4.sin_addr.s_addr!=0)
+		{
+			bind_addr_used=1;
+			bind_addr.v4=local_addr.inner.ipv4.sin_addr.s_addr;
+		}
+	}
+	else
+	{
+		assert(raw_ip_version==AF_INET6);
+		char zero_arr[16]={0};
+		if(memcmp(&local_addr.inner.ipv6.sin6_addr,zero_arr,16)!=0)
+		{
+			bind_addr_used=1;
+			bind_addr.v6=local_addr.inner.ipv6.sin6_addr;
+		}
+	}
+	//bind_address_uint32=local_ip_uint32;//only server has bind adress,client sets it to zero
+
+	if(lower_level)
+	{
+		if(lower_level_manual)
+		{
+			init_ifindex(if_name,raw_send_fd,ifindex);
+			mylog(log_info,"we are running at lower-level (manual) mode\n");
+		}
+		else
+		{
+			mylog(log_info,"we are running at lower-level (auto) mode\n");
+		}
+
+	}
+
+	 if(raw_mode==mode_faketcp)
+	 {
+		 bind_fd=socket(local_addr.get_type(),SOCK_STREAM,0);
+	 }
+	 else  if(raw_mode==mode_udp||raw_mode==mode_icmp)//bind an adress to avoid collision,for icmp,there is no port,just bind a udp port
+	 {
+		 bind_fd=socket(local_addr.get_type(),SOCK_DGRAM,0);
+	 }
+
+	 //struct sockaddr_in temp_bind_addr={0};
+    // bzero(&temp_bind_addr, sizeof(temp_bind_addr));
+
+     //temp_bind_addr.sin_family = AF_INET;
+     //temp_bind_addr.sin_port = local_addr.get_port();
+     //temp_bind_addr.sin_addr.s_addr = local_addr.inner.ipv4.sin_addr.s_addr;
+
+     if (bind(bind_fd, (struct sockaddr*)&local_addr.inner, local_addr.get_len()) !=0)
+     {
+    	 mylog(log_fatal,"bind fail\n");
+    	 myexit(-1);
+     }
+
+	 if(raw_mode==mode_faketcp)
+	 {
+
+		 if(listen(bind_fd, SOMAXCONN) != 0 )
+		 {
+			 mylog(log_fatal,"listen fail\n");
+			 myexit(-1);
+		 }
+	 }
+
+
+
+	//init_raw_socket();
+	init_filter(local_addr.get_port());//bpf filter
+
+	epollfd = epoll_create1(0);
+	const int max_events = 4096;
+
+	struct epoll_event ev, events[max_events];
+	if (epollfd < 0) {
+		mylog(log_fatal,"epoll return %d\n", epollfd);
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = raw_recv_fd;
+
+	ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, raw_recv_fd, &ev);
+	if (ret!= 0) {
+		mylog(log_fatal,"add raw_fd error\n");
+		myexit(-1);
+	}
+	int timer_fd;
+
+	set_timer(epollfd,timer_fd);
+
+	u64_t begin_time=0;
+	u64_t end_time=0;
+
+	mylog(log_info,"now listening at %s\n",local_addr.get_str());
+
+	int fifo_fd=-1;
+
+	if(fifo_file[0]!=0)
+	{
+		fifo_fd=create_fifo(fifo_file);
+		ev.events = EPOLLIN;
+		ev.data.u64 = fifo_fd;
+
+		ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, fifo_fd, &ev);
+		if (ret!= 0) {
+			mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
+			myexit(-1);
+		}
+		mylog(log_info,"fifo_file=%s\n",fifo_file);
+	}
+
+
+	while(1)////////////////////////
+	{
+
+		if(about_to_exit) myexit(0);
+
+		int nfds = epoll_wait(epollfd, events, max_events, 180 * 1000);
+		if (nfds < 0) {  //allow zero
+			if(errno==EINTR  )
+			{
+				mylog(log_info,"epoll interrupted by signal,continue\n");
+				//myexit(0);
+			}
+			else
+			{
+				mylog(log_fatal,"epoll_wait return %d,%s\n", nfds,strerror(errno));
+				myexit(-1);
+			}
+		}
+		int idx;
+		for (idx = 0; idx < nfds; ++idx)
+		{
+			//mylog(log_debug,"ndfs:  %d \n",nfds);
+			epoll_trigger_counter++;
+			//printf("%d %d %d %d\n",timer_fd,raw_recv_fd,raw_send_fd,n);
+			if ((events[idx].data.u64 ) == (u64_t)timer_fd)
+			{
+				if(debug_flag)begin_time=get_current_time();
+				conn_manager.clear_inactive();
+				u64_t dummy;
+				int unused=read(timer_fd, &dummy, 8);
+				//current_time_rough=get_current_time();
+				if(debug_flag)
+				{
+					end_time=get_current_time();
+					mylog(log_debug,"timer_fd,%llu,%llu,%llu\n",begin_time,end_time,end_time-begin_time);
+				}
+
+				mylog(log_trace,"epoll_trigger_counter:  %d \n",epoll_trigger_counter);
+				epoll_trigger_counter=0;
+
+			}
+			else if (events[idx].data.u64 == (u64_t)raw_recv_fd)
+			{
+				if(debug_flag)begin_time=get_current_time();
+				server_on_raw_recv_multi();
+				if(debug_flag)
+				{
+					end_time=get_current_time();
+					mylog(log_debug,"raw_recv_fd,%llu,%llu,%llu  \n",begin_time,end_time,end_time-begin_time);
+				}
+			}
+			else if (events[idx].data.u64 == (u64_t)fifo_fd)
+			{
+				int len=read (fifo_fd, buf, sizeof (buf));
+				if(len<0)
+				{
+					mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+				//assert(len>=0);
+				buf[len]=0;
+				while(len>=1&&buf[len-1]=='\n')
+					buf[len-1]=0;
+				mylog(log_info,"got data from fifo,len=%d,s=[%s]\n",len,buf);
+				mylog(log_info,"unknown command\n");
+			}
+			else if (events[idx].data.u64>u32_t(-1) )
+			{
+
+				fd64_t fd64=events[idx].data.u64;
+				if(!fd_manager.exist(fd64))
+				{
+					mylog(log_trace ,"fd64 no longer exist\n");
+					return -1;
+				}
+				assert(fd_manager.exist_info(fd64));
+				conn_info_t* p_conn_info=fd_manager.get_info(fd64).p_conn_info;
+				conn_info_t &conn_info=*p_conn_info;
+				if(fd64==conn_info.timer_fd64)//////////timer_fd64
+				{
+
+					if(debug_flag)begin_time=get_current_time();
+					int fd=fd_manager.to_fd(fd64);
+					u64_t dummy;
+					int unused=read(fd, &dummy, 8);
+					assert(conn_info.state.server_current_state == server_ready); //TODO remove this for peformance
+					server_on_timer_multi(conn_info);
+					if(debug_flag)
+					{
+						end_time=get_current_time();
+						mylog(log_debug,"(events[idx].data.u64 >>32u) == 2u ,%llu,%llu,%llu  \n",begin_time,end_time,end_time-begin_time);
+					}
+				}
+				else//udp_fd64
+				{
+					if(debug_flag)begin_time=get_current_time();
+					server_on_udp_recv(conn_info,fd64);
+					if(debug_flag)
+					{
+						end_time=get_current_time();
+						mylog(log_debug,"(events[idx].data.u64 >>32u) == 1u,%lld,%lld,%lld  \n",begin_time,end_time,end_time-begin_time);
+					}
+				}
+			}
+			else
+			{
+				mylog(log_fatal,"unknown fd,this should never happen\n");
+				myexit(-1);
+			}
+
+		}
+	}
+	return 0;
+}