patch-2.1.15 linux/net/802/llc.c

• Lines: 413
• Date: Thu Jan 1 02:00:00 1970
• Orig file: v2.1.14/linux/net/802/llc.c
• Orig date: Tue Jun 6 11:22:14 1995

diff -u --recursive --new-file v2.1.14/linux/net/802/llc.c linux/net/802/llc.c
@@ -1,412 +0,0 @@
-/*
- *	802.2 Class 2 LLC service.
- */
- 
- 
-int llc_rx_adm(struct sock *sk,struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(type==CMD)
-	{
-		if(cmd==DISC)
-			send_response(sk,DM|pf);
-		else if(cmd==SABM)
-		{
-			if(sk->state!=TCP_LISTEN)
-				send_response(sk. DM|pf);
-			else
-			{
-				sk=ll_rx_accept(sk);
-				if(sk!=NULL)
-				{
-					send_response(sk, UA|pf);
-					sk->llc.vs=0;
-					sk->llc.vr=0;
-					sk->llc.p_flag=0;
-					sk->llc.remote_busy=0;
-					llc_state(sk,LLC_NORMAL);
-				}
-			}	
-		}
-		else if(pf)
-			send_response(sk, DM|PF);
-	}
-	return 0;
-}
-
-int llc_rx_setup(struct sock *sk, struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(type==CMD)
-	{
-		if(cmd==SABM)
-		{
-			sk->llc.vs=0;
-			sk->llc.vr=0;
-			send_response(sk, UA|pf);
-		}
-		if(cmd==DISC)
-		{
-			send_response(sk, DM|pf);
-			llc_error(sk,ECONNRESET);
-			llc_state(sk, LLC_ADM);
-		}
-	}
-	else
-	{
-		if(cmd==UA && pf==sk->llc.p_flag)
-		{
-			del_timer(&sk->llc.t1);
-			sk->llc.vs=0;
-			llc_update_p_flag(sk,pf);
-			llc_state(sk,LLC_NORMAL);
-		}
-		if(cmd==DM)
-		{
-			llc_error(sk, ECONNRESET);
-			llc_state(sk, LLC_ADM);
-		}
-	}
-}
-
-int llc_rx_reset(struct sock *sk, struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(type==CMD)
-	{
-		if(cmd==SABM)
-		{
-			sk->llc.vr=0;
-			sk->llc.vs=0;
-			send_response(sk, UA|pf);
-		}
-		else if(cmd==DISC)
-		{
-			if(sk->llc.cause_flag==1)
-				llc_shutdown(sk,SHUTDOWN_MASK);
-			else
-				llc_eror(sk, ECONNREFUSED);
-			send_response(sk, DM|pf);
-			llc_state(sk, LLC_ADM);
-		}
-	}
-	else
-	{
-		if(cmd==UA)
-		{
-			if(sk->llc.p_flag==pf)
-			{
-				del_timer(&sk->llc.t1);
-				sk->llc.vs=0;
-				sk->llc.vr=0;
-				llc_update_p_flag(sk,pf);
-				llc_confirm_reset(sk, sk->llc.cause_flag);
-				sk->llc.remote_busy=0;
-				llc_state(sk, LLC_NORMAL);
-			}
-		}
-		if(cmd==DM)
-		{	/* Should check cause_flag */
-			llc_shutdown(sk, SHUTDOWN_MASK);
-			llc_state(sk, LLC_ADM);
-		}
-	}
-	return 0;
-}
-
-int llc_rx_d_conn(struct sock *sk, struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(type==CMD)
-	{
-		if(cmd==SABM)
-		{
-			llc_error(sk, ECONNRESET);
-			llc_state(sk, ADM);
-		}
-		else if(cmd==DISC)
-		{
-			send_response(UA|pf);
-			llc_state(sk, LLC_D_CONN);
-		}
-		else if(pf)
-			send_response(sk, DM|PF);
-	}
-	else
-	{
-		if(cmd==UA && pf==sk->llc.p_flag)
-		{
-			del_timer(&sk->llc.t1);
-			llc_state(sk, ADM);
-			llc_confirm_reset(sk, sk->llc.cause_flag);
-		}
-		if(cmd==DM)
-		{
-			del_timer(&sk->llc.t1);
-			/*if(sk->llc.cause_flag)*/
-			llc_shutdown(sk, SHUTDOWN_MASK);	
-		}
-		
-	}
-	return 0;
-}
-
-int llc_rx_error(struct sock *sk, struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(type==CMD)
-	{
-		if(cmd==SABM)
-		{
-			sk->llc.vs=0;
-			sk->llc.vr=0;
-			send_response(sk, UA|pf);
-			llc_error(sk,ECONNRESET);
-			sk->llc.p_flag=0;
-			sk->llc.remote_busy=0;
-			llc_state(sk, LLC_NORMAL);
-		}
-		else if(cmd==DISC)
-		{
-			send_response(sk, UA|pf);
-			llc_shutdown(sk, SHUTDOWN_MASK);
-			llc_state(sk, LLC_ADM);
-		}
-		else
-			llc_resend_frmr_rsp(sk,pf);
-	}
-	else
-	{
-		if(cmd==DM)
-		{
-			llc_error(sk, ECONNRESET);
-			del_timer(&sk->llc.t1);
-			llc_state(sk, LLC_ADM);
-		}
-		if(cmd==FRMR)
-		{
-			send_command(sk, SABM);
-			sk->llc.p_flag=pf;
-			llc_start_t1();
-			sk->llc.retry_count=0;
-			sk->llc.cause_flag=0;
-			llc_error(sk, EPROTO);
-			llc_state(sk, LLC_RESET);
-		}
-	}
-}
-
-
-/*
- *	Subroutine for handling the shared cases of the data modes.
- */
- 
-int llc_rx_nr_shared(struct sock *sk, struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(type==CMD)
-	{
-		if(cmd==SABM)
-		{
-			/*
-			 *	Optional reset processing. We decline resets.
-			 */
-			send_response(sk,DM|pf);
-			llc_error(sk, ECONNRESET);
-			llc_state(sk, LLC_ADM);
-		}
-		else if(cmd==DISC)
-		{
-			send_response(sk,UA|pf);
-			llc_state(sk, LLC_ADM);
-			llc_shutdown(sk, SHUTDOWN_MASK);
-		}
-		/*
-		 *	We only ever use windows of 7, so there is no illegal NR/NS value
-		 *	otherwise we would FRMR here and go to ERROR state
-		 */
-		else if(cmd==ILLEGAL)
-		{
-			llc_send_frmr_response(sk, ILLEGAL_TYPE,pf);
-			llc_state(sk, LLC_ERROR);
-			llc_error(sk, EPROTO);
-		}
-		else
-			/*
-			 *	Not covered by general rule
-			 */
-			return 0;
-	}
-	else
-	{
-		/*
-		 *	We close on errors
-		 */
-		if(cmd==FRMR)
-		{
-			send_command(sk, DM|pf);
-			sk->llc.p_flag=pf;
-			llc_start_t1(sk);
-			llc_error(sk, EPROTO);
-			sk->llc.cause_flag=0;
-			llc_state(sk, LLC_D_CONN):
-		}
-		else if(cmd==DM)
-		{
-			llc_state(sk, LLC_ADM);
-			llc_error(sk, ECONNREFUSED);
-		}
-		/*
-		 *	We always use a window of 7 so can't get I resp
-		 *	with invalid NS,  or any resp with invalid NR. If
-		 *	we add this they do the same as..
-		 */
-		else if(cmd==UA)
-		{
-			llc_send_frmr_response(sk, UNEXPECTED_CONTROL, pf);
-			llc_state(sk, LLC_ERROR);
-			llc_error(sk, EPROTO);
-		}
-		else if(pf==1 && sk->llc.p_flag==0)
-		{
-			llc_send_frmr_response(sk, UNEXPECTED_RESPONSE, pf);
-			llc_state(sk, LLC_ERROR);
-			llc_error(sk, EPROTO);
-		}
-		else if(cmd==ILLEGAL)
-		{
-			llc_send_frmr_response(sk, ILLEGAL_TYPE,pf);
-			llc_state(sk, LLC_ERROR);
-			llc_error(sk, EPROTO);
-		}
-		else
-			/*
-			 *	Not covered by general rule
-			 */
-			return 0
-	}
-	/*
-	 *	Processed.
-	 */
-	return 1;
-}
-
-int llc_rx_normal(struct sock *sk, struct sk_buff *skb, int type, int cmd, int pf, int nr, int ns)
-{
-	if(llc_rx_nr_shared(sk, skb, type, cmd, pf, nr, ns))
-		return 0;
-	if(cmd==I)
-	{
-		if(llc_invalid_ns(sk,ns))
-		{
-			if((type==RESP && sk->llc.p_flag==pf)||(type==CMD && pf==0 && sk->llc.p_flag==0))
-			{
-				llc_command(sk, REJ|PF);
-				llc_ack_frames(sk,nr);	/* Ack frames and update N(R) */
-				sk->llc.p_flag=PF;
-				llc_state(sk, LLC_REJECT);
-				sk->llc.retry_count=0;
-				llc_start_t1(sk);
-				sk->llc.remote_busy=0;
-			}
-			else if((type==CMD && !pf && sk->llc.p_flag==1) || (type==RESP && !pf && sk->llc.p_flag==1))
-			{
-				if(type==CMD)
-					llc_response(sk, REJ);
-				else
-					llc_command(sk, REJ);
-				llc_ack_frames(sk,nr);
-				sk->llc.retry_count=0;
-				llc_state(sk, LLC_REJECT);
-				llc_start_t1(sk);
-			}
-			else if(pf && type==CMD)
-			{
-				llc_response(sk, REJ|PF);
-				llc_ack_frames(sk,nr);
-				sk->llc.retry_count=0;
-				llc_start_t1(sk);
-			}
-		}
-		else
-		{
-			/*
-			 *	Valid I frame cases
-			 */
-			 
-			 if(sk->llc.p_flag==pf && !(type==CMD && pf))
-			 {
-			 	sk->llc.vr=(sk->llc.vr+1)&7;
-			 	llc_queue_rr_cmd(sk, PF);
-			 	sk->llc.retry_count=0;
-			 	llc_start_t1(sk);
-			 	sk->llc.p_flag=1;
-			 	llc_ack_frames(sk,nr);
-			 	sk->llc.remote_busy=0;
-			 }
-			 else if(sk->ppc.p_flag!=pf)
-			 {
-			 	sk->llc.vr=(sk->llc.vr+1)&7;
-			 	if(type==CMD)
-			 		llc_queue_rr_resp(sk, 0);
-			 	else
-			 		llc_queue_rr_cmd(sk, 0);
-			 	if(sk->llc.nr!=nr)
-			 	{
-			 		llc_ack_frames(sk,nr);
-			 		llc_reset_t1(sk);
-			 	}
-			 }
-			 else if(pf)
-			 {
-			 	sk->llc.vr=(sk->llc.vr+1)&7;
-			 	llc_queue_rr_resp(sk,PF);
-			 	if(sk->llc.nr!=nr)
-			 	{
-					llc_ack_frames(sk,nr);
-					llc_reset_t1(sk);
-			 	}
-			 }
-			 llc_queue_data(sk,skb);
-			 return 1;
-		}
-	}
-	else if(cmd==RR||cmd==RNR)
-	{
-		if(type==CMD || (type==RESP && (!pf || pf==1 && sk->llc.p_flag==1)))
-		{
-			llc_update_p_flag(sk,pf);
-			if(sk->llc.nr!=nr)
-			{
-				llc_ack_frames(sk,nr);
-				llc_reset_t1(sk);
-			}
-			if(cmd==RR)
-				sk->llc.remote_busy=0;
-			else
-			{	sk->llc.remote_busy=1;
-					if(!llc_t1_running(sk))
-					llc_start_t1(sk);
-			}
-		}
-		else if(type==cmd && pf)
-		{
-			if(cmd==RR)
-				llc_queue_rr_resp(sk,PF);
-			else
-			{
-				send_response(sk, RR|PF);
-				if(!llc_t1_running(sk))
-					llc_start_t1(sk);
-			}
-			if(sk->llc.nr!=nr)
-			{
-				llc_ack_frames(sk,nr);
-				llc_reset_t1(sk);
-			}
-			if(cmd==RR)
-				sk->llc.remote_busy=0;
-			else
-				sk->llc.remote_busy=1;
-		}
-	}
-	else if(cmd==REJ)
-	{
-		
-	}
-}
-