11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*
21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Generic HDLC support routines for Linux
31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Frame Relay support
41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *
5eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *
71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it
81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of version 2 of the GNU General Public License
91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as published by the Free Software Foundation.
101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *
111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds            Theory of PVC state
131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DCE mode:
151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (exist,new) -> 0,0 when "PVC create" or if "link unreliable"
171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds         0,x -> 1,1 if "link reliable" when sending FULL STATUS
181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds         1,1 -> 1,0 if received FULL STATUS ACK
191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (active)    -> 0 when "ifconfig PVC down" or "link unreliable" or "PVC create"
211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds             -> 1 when "PVC up" and (exist,new) = 1,0
221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DTE mode:
241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (exist,new,active) = FULL STATUS if "link reliable"
251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    = 0, 0, 0 if "link unreliable"
261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds No LMI:
271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds active = open and "link reliable"
281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds exist = new = not used
291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
30b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa CCITT LMI: ITU-T Q.933 Annex A
31b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa ANSI LMI: ANSI T1.617 Annex D
32b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa CISCO LMI: the original, aka "Gang of Four" LMI
33b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/
351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h>
374dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/etherdevice.h>
384dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/hdlc.h>
391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/if_arp.h>
404dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/inetdevice.h>
411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h>
424dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/kernel.h>
434dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/module.h>
441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pkt_sched.h>
454dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/poll.h>
461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rtnetlink.h>
474dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/skbuff.h>
484dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa#include <linux/slab.h>
491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef DEBUG_PKT
511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef DEBUG_ECN
521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef DEBUG_LINK
53eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa#undef DEBUG_PROTO
54eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa#undef DEBUG_PVC
551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
56b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define FR_UI			0x03
57b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define FR_PAD			0x00
58b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
59b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define NLPID_IP		0xCC
60b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define NLPID_IPV6		0x8E
61b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define NLPID_SNAP		0x80
62b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define NLPID_PAD		0x00
63b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define NLPID_CCITT_ANSI_LMI	0x08
64b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define NLPID_CISCO_LMI		0x09
65b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
66b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
67b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CCITT_ANSI_DLCI	   0 /* LMI DLCI */
68b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CISCO_DLCI		1023
69b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
70b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CALLREF		0x00 /* Call Reference */
71b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_ANSI_LOCKSHIFT	0x95 /* ANSI locking shift */
72b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_ANSI_CISCO_REPTYPE	0x01 /* report type */
73b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CCITT_REPTYPE	0x51
74b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_ANSI_CISCO_ALIVE	0x03 /* keep alive */
75b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CCITT_ALIVE		0x53
76b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_ANSI_CISCO_PVCSTAT	0x07 /* PVC status */
77b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CCITT_PVCSTAT	0x57
78b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
79b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_FULLREP		0x00 /* full report  */
80b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_INTEGRITY		0x01 /* link integrity report */
81b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_SINGLE		0x02 /* single PVC report */
82b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LMI_STATUS_ENQUIRY      0x75
841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LMI_STATUS              0x7D /* reply */
851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LMI_REPT_LEN               1 /* report type element length */
871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LMI_INTEG_LEN              2 /* link integrity element length */
881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
89b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_CCITT_CISCO_LENGTH	  13 /* LMI frame lengths */
90b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa#define LMI_ANSI_LENGTH		  14
911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef struct {
941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(__LITTLE_ENDIAN_BITFIELD)
951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned ea1:	1;
961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned cr:	1;
971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned dlcih:	6;
984dfce4075aa4e2eee35e52a78dbabfe37d94c908Krzysztof Hałasa
991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned ea2:	1;
1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned de:	1;
1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned becn:	1;
1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned fecn:	1;
1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned dlcil:	4;
1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else
1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned dlcih:	6;
1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned cr:	1;
1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned ea1:	1;
1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned dlcil:	4;
1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned fecn:	1;
1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned becn:	1;
1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned de:	1;
1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unsigned ea2:	1;
1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif
115ba2d3587912f82d1ab4367975b1df460db60fb1eEric Dumazet}__packed fr_hdr;
1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
118eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasatypedef struct pvc_device_struct {
119eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct net_device *frad;
120eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct net_device *main;
121eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct net_device *ether;	/* bridged Ethernet interface	*/
122eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct pvc_device_struct *next;	/* Sorted in ascending DLCI order */
123eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int dlci;
124eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int open_count;
125eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
126eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct {
127eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int new: 1;
128eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int active: 1;
129eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int exist: 1;
130eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int deleted: 1;
131eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int fecn: 1;
132eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int becn: 1;
133eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		unsigned int bandwidth;	/* Cisco LMI reporting only */
134eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	}state;
135eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa}pvc_device;
136eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
137eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastruct frad_state {
138eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	fr_proto settings;
139eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *first_pvc;
140eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int dce_pvc_count;
141eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
142eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct timer_list timer;
143eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	unsigned long last_poll;
144eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int reliable;
145eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int dce_changed;
146eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int request;
147eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int fullrep_sent;
148eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	u32 last_errors; /* last errors bit list */
149eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	u8 n391cnt;
150eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	u8 txseq; /* TX sequence number */
151eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	u8 rxseq; /* RX sequence number */
152eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa};
153eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
154eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
155eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic int fr_ioctl(struct net_device *dev, struct ifreq *ifr);
156eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
157eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u16 q922_to_dlci(u8 *hdr)
1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4);
1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void dlci_to_q922(u8 *hdr, u16 dlci)
1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdr[0] = (dlci >> 2) & 0xFC;
1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdr[1] = ((dlci << 4) & 0xF0) | 0x01;
1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
171983e23041b28abb113862b2935a85cfb9aab4f5aKrzysztof Halasastatic inline struct frad_state* state(hdlc_device *hdlc)
172eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa{
173eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	return(struct frad_state *)(hdlc->state);
174eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa}
175eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
176eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline pvc_device* find_pvc(hdlc_device *hdlc, u16 dlci)
1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
179eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *pvc = state(hdlc)->first_pvc;
1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (pvc) {
1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->dlci == dlci)
1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return pvc;
1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->dlci > dlci)
185870571a2ef6fb2d6306673b4376fec93d441e013Rudy Matela			return NULL; /* the list is sorted */
1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc = pvc->next;
1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return NULL;
1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
193eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic pvc_device* add_pvc(struct net_device *dev, u16 dlci)
1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
196eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (*pvc_p) {
1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if ((*pvc_p)->dlci == dlci)
2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return *pvc_p;
2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if ((*pvc_p)->dlci > dlci)
2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			break;	/* the list is sorted */
2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc_p = &(*pvc_p)->next;
2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2061ee325438cdbe374ebea6e3d2f19204072c15038Mariusz Kozlowski	pvc = kzalloc(sizeof(pvc_device), GFP_ATOMIC);
207eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa#ifdef DEBUG_PVC
208eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	printk(KERN_DEBUG "add_pvc: allocated pvc %p, frad %p\n", pvc, dev);
209eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa#endif
2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (!pvc)
2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return NULL;
2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	pvc->dlci = dlci;
214eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc->frad = dev;
2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	pvc->next = *pvc_p;	/* Put it in the chain */
2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	*pvc_p = pvc;
2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return pvc;
2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline int pvc_is_used(pvc_device *pvc)
2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
223eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	return pvc->main || pvc->ether;
2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void pvc_carrier(int on, pvc_device *pvc)
2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (on) {
2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->main)
2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (!netif_carrier_ok(pvc->main))
2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				netif_carrier_on(pvc->main);
2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->ether)
2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (!netif_carrier_ok(pvc->ether))
2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				netif_carrier_on(pvc->ether);
2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else {
2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->main)
2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (netif_carrier_ok(pvc->main))
2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				netif_carrier_off(pvc->main);
2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->ether)
2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (netif_carrier_ok(pvc->ether))
2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				netif_carrier_off(pvc->ether);
2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void delete_unused_pvcs(hdlc_device *hdlc)
2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
249eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device **pvc_p = &state(hdlc)->first_pvc;
2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (*pvc_p) {
2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (!pvc_is_used(*pvc_p)) {
2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc_device *pvc = *pvc_p;
254eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa#ifdef DEBUG_PVC
255eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			printk(KERN_DEBUG "freeing unused pvc: %p\n", pvc);
256eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa#endif
2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			*pvc_p = pvc->next;
2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			kfree(pvc);
2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			continue;
2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc_p = &(*pvc_p)->next;
2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline struct net_device** get_dev_p(pvc_device *pvc, int type)
2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (type == ARPHRD_ETHER)
2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return &pvc->ether;
2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	else
2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return &pvc->main;
2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fr_hard_header(struct sk_buff **skb_p, u16 dlci)
2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	u16 head_len;
2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	struct sk_buff *skb = *skb_p;
2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	switch (skb->protocol) {
28109640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison	case cpu_to_be16(NLPID_CCITT_ANSI_LMI):
2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		head_len = 4;
2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_push(skb, head_len);
284b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		skb->data[3] = NLPID_CCITT_ANSI_LMI;
2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		break;
2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
28709640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison	case cpu_to_be16(NLPID_CISCO_LMI):
2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		head_len = 4;
2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_push(skb, head_len);
290b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		skb->data[3] = NLPID_CISCO_LMI;
2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		break;
2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
29309640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison	case cpu_to_be16(ETH_P_IP):
294b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		head_len = 4;
295b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		skb_push(skb, head_len);
296b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		skb->data[3] = NLPID_IP;
297b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		break;
298b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
29909640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison	case cpu_to_be16(ETH_P_IPV6):
3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		head_len = 4;
3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_push(skb, head_len);
302b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		skb->data[3] = NLPID_IPV6;
3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		break;
3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
30509640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison	case cpu_to_be16(ETH_P_802_3):
3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		head_len = 10;
3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (skb_headroom(skb) < head_len) {
3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			struct sk_buff *skb2 = skb_realloc_headroom(skb,
3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds								    head_len);
3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (!skb2)
3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				return -ENOBUFS;
3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			dev_kfree_skb(skb);
3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			skb = *skb_p = skb2;
3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_push(skb, head_len);
3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[3] = FR_PAD;
3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[4] = NLPID_SNAP;
3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[5] = FR_PAD;
3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[6] = 0x80;
3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[7] = 0xC2;
3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[8] = 0x00;
3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[9] = 0x07; /* bridged Ethernet frame w/out FCS */
3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		break;
3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	default:
3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		head_len = 10;
3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_push(skb, head_len);
3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[3] = FR_PAD;
3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[4] = NLPID_SNAP;
3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[5] = FR_PAD;
3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[6] = FR_PAD;
3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->data[7] = FR_PAD;
333abf17ffda7b7b6c83a29d7ccea91d46065c6ca3eKrzysztof Halasa		*(__be16*)(skb->data + 8) = skb->protocol;
3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dlci_to_q922(skb->data, dlci);
3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	skb->data[2] = FR_UI;
3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return 0;
3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pvc_open(struct net_device *dev)
3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
3452baf8a2daab65cdd3f20bfeb4676a2f6aff7c3bfWang Chen	pvc_device *pvc = dev->ml_priv;
3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
347eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if ((pvc->frad->flags & IFF_UP) == 0)
348eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		return -EIO;  /* Frad must be UP in order to activate PVC */
3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (pvc->open_count++ == 0) {
351eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
352eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->settings.lmi == LMI_NONE)
353eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			pvc->state.active = netif_carrier_ok(pvc->frad);
3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc_carrier(pvc->state.active, pvc);
356eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_changed = 1;
3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return 0;
3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pvc_close(struct net_device *dev)
3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
3652baf8a2daab65cdd3f20bfeb4676a2f6aff7c3bfWang Chen	pvc_device *pvc = dev->ml_priv;
3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (--pvc->open_count == 0) {
368eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
369eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->settings.lmi == LMI_NONE)
3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.active = 0;
3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
372eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->settings.dce) {
373eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->dce_changed = 1;
3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.active = 0;
3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return 0;
3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3827665a08928f241247afe8c76865cdbe4ef5489bfAdrian Bunkstatic int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
3842baf8a2daab65cdd3f20bfeb4676a2f6aff7c3bfWang Chen	pvc_device *pvc = dev->ml_priv;
3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	fr_proto_pvc_info info;
3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (ifr->ifr_settings.type == IF_GET_PROTO) {
3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (dev->type == ARPHRD_ETHER)
3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			ifr->ifr_settings.type = IF_PROTO_FR_ETH_PVC;
3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		else
3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			ifr->ifr_settings.type = IF_PROTO_FR_PVC;
3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (ifr->ifr_settings.size < sizeof(info)) {
3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			/* data size wanted */
3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			ifr->ifr_settings.size = sizeof(info);
3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -ENOBUFS;
3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		info.dlci = pvc->dlci;
400eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		memcpy(info.master, pvc->frad->name, IFNAMSIZ);
4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (copy_to_user(ifr->ifr_settings.ifs_ifsu.fr_pvc_info,
4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				 &info, sizeof(info)))
4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EFAULT;
4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 0;
4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return -EINVAL;
4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
410d71a674922e7519edb477ecb585e7d29d69c7aa7Stephen Hemmingerstatic netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev)
4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
4122baf8a2daab65cdd3f20bfeb4676a2f6aff7c3bfWang Chen	pvc_device *pvc = dev->ml_priv;
4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (pvc->state.active) {
4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (dev->type == ARPHRD_ETHER) {
4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			int pad = ETH_ZLEN - skb->len;
4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (pad > 0) { /* Pad the frame with zeros */
4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				int len = skb->len;
4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				if (skb_tailroom(skb) < pad)
4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds					if (pskb_expand_head(skb, 0, pad,
4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds							     GFP_ATOMIC)) {
422198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa						dev->stats.tx_dropped++;
4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds						dev_kfree_skb(skb);
4246ed106549d17474ca17a16057f4c0ed4eba5a7caPatrick McHardy						return NETDEV_TX_OK;
4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds					}
4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				skb_put(skb, pad);
4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				memset(skb->data + len, 0, pad);
4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			}
42909640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison			skb->protocol = cpu_to_be16(ETH_P_802_3);
4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (!fr_hard_header(&skb, pvc->dlci)) {
432198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa			dev->stats.tx_bytes += skb->len;
433198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa			dev->stats.tx_packets++;
4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (pvc->state.fecn) /* TX Congestion counter */
435198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa				dev->stats.tx_compressed++;
436eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			skb->dev = pvc->frad;
4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			dev_queue_xmit(skb);
4386ed106549d17474ca17a16057f4c0ed4eba5a7caPatrick McHardy			return NETDEV_TX_OK;
4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
442198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa	dev->stats.tx_dropped++;
4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev_kfree_skb(skb);
4446ed106549d17474ca17a16057f4c0ed4eba5a7caPatrick McHardy	return NETDEV_TX_OK;
4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void fr_log_dlci_active(pvc_device *pvc)
4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
44912a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches	netdev_info(pvc->frad, "DLCI %d [%s%s%s]%s %s\n",
45012a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    pvc->dlci,
45112a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    pvc->main ? pvc->main->name : "",
45212a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    pvc->main && pvc->ether ? " " : "",
45312a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    pvc->ether ? pvc->ether->name : "",
45412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    pvc->state.new ? " new" : "",
45512a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    !pvc->state.exist ? "deleted" :
45612a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		    pvc->state.active ? "active" : "inactive");
4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u8 fr_lmi_nextseq(u8 x)
4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	x++;
4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return x ? x : 1;
4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fr_lmi_send(struct net_device *dev, int fullrep)
4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	struct sk_buff *skb;
472eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *pvc = state(hdlc)->first_pvc;
473eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int lmi = state(hdlc)->settings.lmi;
474eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int dce = state(hdlc)->settings.dce;
475b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH;
476b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	int stat_len = (lmi == LMI_CISCO) ? 6 : 3;
4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	u8 *data;
4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	int i = 0;
4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
480b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (dce && fullrep) {
481eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		len += state(hdlc)->dce_pvc_count * (2 + stat_len);
4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (len > HDLC_MAX_MRU) {
48312a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			netdev_warn(dev, "Too many PVCs while sending LMI full report\n");
4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return;
4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	skb = dev_alloc_skb(len);
4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (!skb) {
49012a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_warn(dev, "Memory squeeze on fr_lmi_send()\n");
4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return;
4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	memset(skb->data, 0, len);
4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	skb_reserve(skb, 4);
495b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (lmi == LMI_CISCO) {
49609640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison		skb->protocol = cpu_to_be16(NLPID_CISCO_LMI);
497b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		fr_hard_header(&skb, LMI_CISCO_DLCI);
498b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	} else {
49909640e6365c679b5642b1c41b6d7078f51689ddfHarvey Harrison		skb->protocol = cpu_to_be16(NLPID_CCITT_ANSI_LMI);
500b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI);
501b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	}
50227a884dc3cb63b93c2b3b643f5b31eed5f8a4d26Arnaldo Carvalho de Melo	data = skb_tail_pointer(skb);
5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	data[i++] = LMI_CALLREF;
504b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY;
505b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (lmi == LMI_ANSI)
5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		data[i++] = LMI_ANSI_LOCKSHIFT;
507b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
508b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		LMI_ANSI_CISCO_REPTYPE;
5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	data[i++] = LMI_REPT_LEN;
5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY;
511b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE;
5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	data[i++] = LMI_INTEG_LEN;
513eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	data[i++] = state(hdlc)->txseq =
514eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		fr_lmi_nextseq(state(hdlc)->txseq);
515eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	data[i++] = state(hdlc)->rxseq;
5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
517b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (dce && fullrep) {
5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		while (pvc) {
519b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
520b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				LMI_ANSI_CISCO_PVCSTAT;
5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			data[i++] = stat_len;
5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			/* LMI start/restart */
524eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			if (state(hdlc)->reliable && !pvc->state.exist) {
5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc->state.exist = pvc->state.new = 1;
5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				fr_log_dlci_active(pvc);
5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			}
5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			/* ifconfig PVC up */
5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (pvc->open_count && !pvc->state.active &&
5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			    pvc->state.exist && !pvc->state.new) {
5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc_carrier(1, pvc);
5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc->state.active = 1;
5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				fr_log_dlci_active(pvc);
5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			}
5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
537b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			if (lmi == LMI_CISCO) {
538b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i] = pvc->dlci >> 8;
539b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i + 1] = pvc->dlci & 0xFF;
540b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			} else {
541b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i] = (pvc->dlci >> 4) & 0x3F;
542b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i + 1] = ((pvc->dlci << 3) & 0x78) | 0x80;
543b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i + 2] = 0x80;
544b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			}
545b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
546b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			if (pvc->state.new)
547b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i + 2] |= 0x08;
548b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			else if (pvc->state.active)
549b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				data[i + 2] |= 0x02;
550b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			i += stat_len;
5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc = pvc->next;
5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	skb_put(skb, i);
5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	skb->priority = TC_PRIO_CONTROL;
5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	skb->dev = dev;
559c1d2bbe1cd6c7bbdc6d532cefebb66c7efb789ceArnaldo Carvalho de Melo	skb_reset_network_header(skb);
5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev_queue_xmit(skb);
5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fr_set_link_state(int reliable, struct net_device *dev)
5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
569eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *pvc = state(hdlc)->first_pvc;
5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
571eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->reliable = reliable;
5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (reliable) {
573c2ce920468624d87ec5f91f080ea99681dae6d88Krzysztof Halasa		netif_dormant_off(dev);
574eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->n391cnt = 0; /* Request full status */
575eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_changed = 1;
5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
577eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->settings.lmi == LMI_NONE) {
5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			while (pvc) {	/* Activate all PVCs */
5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc_carrier(1, pvc);
5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc->state.exist = pvc->state.active = 1;
5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc->state.new = 0;
5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc = pvc->next;
5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			}
5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else {
586c2ce920468624d87ec5f91f080ea99681dae6d88Krzysztof Halasa		netif_dormant_on(dev);
5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		while (pvc) {		/* Deactivate all PVCs */
5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc_carrier(0, pvc);
5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.exist = pvc->state.active = 0;
5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.new = 0;
591eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			if (!state(hdlc)->settings.dce)
592b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				pvc->state.bandwidth = 0;
5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc = pvc->next;
5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fr_timer(unsigned long arg)
6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	struct net_device *dev = (struct net_device *)arg;
6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	int i, cnt = 0, reliable;
6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	u32 list;
6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
606eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (state(hdlc)->settings.dce) {
607eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		reliable = state(hdlc)->request &&
608eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			time_before(jiffies, state(hdlc)->last_poll +
609eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa				    state(hdlc)->settings.t392 * HZ);
610eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->request = 0;
611b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	} else {
612eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->last_errors <<= 1; /* Shift the list */
613eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->request) {
614eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			if (state(hdlc)->reliable)
61512a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches				netdev_info(dev, "No LMI status reply received\n");
616eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->last_errors |= 1;
6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
619eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		list = state(hdlc)->last_errors;
620eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		for (i = 0; i < state(hdlc)->settings.n393; i++, list >>= 1)
6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			cnt += (list & 1);	/* errors count */
6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
623eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		reliable = (cnt < state(hdlc)->settings.n392);
6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
626eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (state(hdlc)->reliable != reliable) {
62712a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Link %sreliable\n", reliable ? "" : "un");
6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		fr_set_link_state(reliable, dev);
6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
631eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (state(hdlc)->settings.dce)
632eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->timer.expires = jiffies +
633eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->settings.t392 * HZ;
6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	else {
635eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->n391cnt)
636eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->n391cnt--;
6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
638eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		fr_lmi_send(dev, state(hdlc)->n391cnt == 0);
6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
640eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->last_poll = jiffies;
641eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->request = 1;
642eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->timer.expires = jiffies +
643eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->settings.t391 * HZ;
6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
646eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->timer.function = fr_timer;
647eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->timer.data = arg;
648eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	add_timer(&state(hdlc)->timer);
6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	pvc_device *pvc;
6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	u8 rxseq, txseq;
657eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int lmi = state(hdlc)->settings.lmi;
658eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	int dce = state(hdlc)->settings.dce;
659b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i;
6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
661b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH :
662b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			LMI_CCITT_CISCO_LENGTH)) {
66312a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Short LMI frame\n");
6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 1;
6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
667b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI :
668b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			     NLPID_CCITT_ANSI_LMI)) {
66912a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Received non-LMI frame with LMI DLCI\n");
670b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		return 1;
671b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	}
672b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
673b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[4] != LMI_CALLREF) {
67412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Invalid LMI Call reference (0x%02X)\n",
67512a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    skb->data[4]);
676b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		return 1;
677b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	}
678b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa
679b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[5] != (dce ? LMI_STATUS_ENQUIRY : LMI_STATUS)) {
68012a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Invalid LMI Message type (0x%02X)\n",
68112a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    skb->data[5]);
6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 1;
6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
685b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (lmi == LMI_ANSI) {
686b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		if (skb->data[6] != LMI_ANSI_LOCKSHIFT) {
68712a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			netdev_info(dev, "Not ANSI locking shift in LMI message (0x%02X)\n",
68812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches				    skb->data[6]);
689b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			return 1;
690b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		}
691b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		i = 7;
692b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	} else
693b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		i = 6;
6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
695b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
696b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			     LMI_ANSI_CISCO_REPTYPE)) {
69712a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Not an LMI Report type IE (0x%02X)\n",
69812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    skb->data[i]);
6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 1;
7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
702b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[++i] != LMI_REPT_LEN) {
70312a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Invalid LMI Report type IE length (%u)\n",
70412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    skb->data[i]);
705b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		return 1;
706b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	}
7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
708b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	reptype = skb->data[++i];
709b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (reptype != LMI_INTEGRITY && reptype != LMI_FULLREP) {
71012a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Unsupported LMI Report type (0x%02X)\n",
71112a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    reptype);
712b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		return 1;
713b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	}
7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
715b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[++i] != (lmi == LMI_CCITT ? LMI_CCITT_ALIVE :
716b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			       LMI_ANSI_CISCO_ALIVE)) {
71712a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Not an LMI Link integrity verification IE (0x%02X)\n",
71812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    skb->data[i]);
7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 1;
7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
722b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (skb->data[++i] != LMI_INTEG_LEN) {
72312a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(dev, "Invalid LMI Link integrity verification IE length (%u)\n",
72412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    skb->data[i]);
725b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		return 1;
726b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	}
727b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	i++;
7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
729eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->rxseq = skb->data[i++]; /* TX sequence from peer */
7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	rxseq = skb->data[i++];	/* Should confirm our sequence */
7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
732eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	txseq = state(hdlc)->txseq;
7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
734b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (dce)
735eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->last_poll = jiffies;
7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	error = 0;
738eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (!state(hdlc)->reliable)
7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		error = 1;
7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
741eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (rxseq == 0 || rxseq != txseq) { /* Ask for full report next time */
742eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->n391cnt = 0;
7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		error = 1;
7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
746b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if (dce) {
747eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->fullrep_sent && !error) {
7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Stop sending full report - the last one has been confirmed by DTE */
749eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->fullrep_sent = 0;
750eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			pvc = state(hdlc)->first_pvc;
7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			while (pvc) {
7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				if (pvc->state.new) {
7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds					pvc->state.new = 0;
7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Tell DTE that new PVC is now active */
756eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa					state(hdlc)->dce_changed = 1;
7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				}
7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc = pvc->next;
7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			}
7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
762eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (state(hdlc)->dce_changed) {
7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			reptype = LMI_FULLREP;
764eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->fullrep_sent = 1;
765eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->dce_changed = 0;
7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
768eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->request = 1; /* got request */
7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0);
7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 0;
7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	/* DTE */
7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
775eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->request = 0; /* got response, no request pending */
7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (error)
7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 0;
7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (reptype != LMI_FULLREP)
7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 0;
7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
783eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc = state(hdlc)->first_pvc;
7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (pvc) {
7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc->state.deleted = 1;
7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc = pvc->next;
7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	no_ram = 0;
7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (skb->len >= i + 2 + stat_len) {
7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		u16 dlci;
793b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		u32 bw;
7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		unsigned int active, new;
7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
796b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
797b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				       LMI_ANSI_CISCO_PVCSTAT)) {
79812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			netdev_info(dev, "Not an LMI PVC status IE (0x%02X)\n",
79912a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches				    skb->data[i]);
8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return 1;
8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
803b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		if (skb->data[++i] != stat_len) {
80412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			netdev_info(dev, "Invalid LMI PVC status IE length (%u)\n",
80512a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches				    skb->data[i]);
8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return 1;
8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		i++;
8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
810b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		new = !! (skb->data[i + 2] & 0x08);
811b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		active = !! (skb->data[i + 2] & 0x02);
812b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		if (lmi == LMI_CISCO) {
813b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			dlci = (skb->data[i] << 8) | skb->data[i + 1];
814b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			bw = (skb->data[i + 3] << 16) |
815b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				(skb->data[i + 4] << 8) |
816b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				(skb->data[i + 5]);
817b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		} else {
818b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			dlci = ((skb->data[i] & 0x3F) << 4) |
819b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				((skb->data[i + 1] & 0x78) >> 3);
820b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			bw = 0;
821b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		}
8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc = add_pvc(dev, dlci);
8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (!pvc && !no_ram) {
82612a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			netdev_warn(dev, "Memory squeeze on fr_lmi_recv()\n");
8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			no_ram = 1;
8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc) {
8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.exist = 1;
8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.deleted = 0;
8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if (active != pvc->state.active ||
8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			    new != pvc->state.new ||
835b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			    bw != pvc->state.bandwidth ||
8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			    !pvc->state.exist) {
8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc->state.new = new;
8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc->state.active = active;
839b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa				pvc->state.bandwidth = bw;
8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				pvc_carrier(active, pvc);
8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				fr_log_dlci_active(pvc);
8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			}
8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		i += stat_len;
8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
848eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc = state(hdlc)->first_pvc;
8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (pvc) {
8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->state.deleted && pvc->state.exist) {
8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc_carrier(0, pvc);
8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.active = pvc->state.new = 0;
8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			pvc->state.exist = 0;
855b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			pvc->state.bandwidth = 0;
8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			fr_log_dlci_active(pvc);
8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc = pvc->next;
8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	/* Next full report after N391 polls */
862eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->n391cnt = state(hdlc)->settings.n391;
8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return 0;
8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fr_rx(struct sk_buff *skb)
8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
870eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	struct net_device *frad = skb->dev;
871eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	hdlc_device *hdlc = dev_to_hdlc(frad);
8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	fr_hdr *fh = (fr_hdr*)skb->data;
8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	u8 *data = skb->data;
8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	u16 dlci;
8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	pvc_device *pvc;
8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	struct net_device *dev = NULL;
8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (skb->len <= 4 || fh->ea1 || data[2] != FR_UI)
8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		goto rx_error;
8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dlci = q922_to_dlci(skb->data);
8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
883b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	if ((dlci == LMI_CCITT_ANSI_DLCI &&
884eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	     (state(hdlc)->settings.lmi == LMI_ANSI ||
885eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	      state(hdlc)->settings.lmi == LMI_CCITT)) ||
886b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa	    (dlci == LMI_CISCO_DLCI &&
887eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	     state(hdlc)->settings.lmi == LMI_CISCO)) {
888eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (fr_lmi_recv(frad, skb))
889b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa			goto rx_error;
890b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		dev_kfree_skb_any(skb);
891b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		return NET_RX_SUCCESS;
8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	pvc = find_pvc(hdlc, dlci);
8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (!pvc) {
8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_PKT
89712a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(frad, "No PVC for received frame's DLCI %d\n",
89812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    dlci);
8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif
9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dev_kfree_skb_any(skb);
9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return NET_RX_DROP;
9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (pvc->state.fecn != fh->fecn) {
9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_ECN
906eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", frad->name,
9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		       dlci, fh->fecn ? "N" : "FF");
9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif
9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc->state.fecn ^= 1;
9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (pvc->state.becn != fh->becn) {
9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_ECN
914eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", frad->name,
9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		       dlci, fh->becn ? "N" : "FF");
9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif
9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc->state.becn ^= 1;
9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
922198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa		frad->stats.rx_dropped++;
9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return NET_RX_DROP;
9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (data[3] == NLPID_IP) {
9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */
9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dev = pvc->main;
9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->protocol = htons(ETH_P_IP);
9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else if (data[3] == NLPID_IPV6) {
9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */
9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dev = pvc->main;
9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb->protocol = htons(ETH_P_IPV6);
9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else if (skb->len > 10 && data[3] == FR_PAD &&
9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		   data[4] == NLPID_SNAP && data[5] == FR_PAD) {
938abf17ffda7b7b6c83a29d7ccea91d46065c6ca3eKrzysztof Halasa		u16 oui = ntohs(*(__be16*)(data + 6));
939abf17ffda7b7b6c83a29d7ccea91d46065c6ca3eKrzysztof Halasa		u16 pid = ntohs(*(__be16*)(data + 8));
9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		skb_pull(skb, 10);
9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		switch ((((u32)oui) << 16) | pid) {
9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		case ETH_P_ARP: /* routed frame with SNAP */
9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		case ETH_P_IPX:
9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		case ETH_P_IP:	/* a long variant */
9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		case ETH_P_IPV6:
9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			dev = pvc->main;
9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			skb->protocol = htons(pid);
9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			break;
9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		case 0x80C20007: /* bridged Ethernet frame */
9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			if ((dev = pvc->ether) != NULL)
9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				skb->protocol = eth_type_trans(skb, dev);
9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			break;
9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		default:
95712a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			netdev_info(frad, "Unsupported protocol, OUI=%x PID=%x\n",
95812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches				    oui, pid);
9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			dev_kfree_skb_any(skb);
9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return NET_RX_DROP;
9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else {
96312a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_info(frad, "Unsupported protocol, NLPID=%x length=%i\n",
96412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches			    data[3], skb->len);
9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dev_kfree_skb_any(skb);
9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return NET_RX_DROP;
9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (dev) {
970198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa		dev->stats.rx_packets++; /* PVC traffic */
971198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa		dev->stats.rx_bytes += skb->len;
9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->state.becn)
973198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa			dev->stats.rx_compressed++;
97454364b752ef0c91fe92684df000cc4593d1e8963Krzysztof Halasa		skb->dev = dev;
9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		netif_rx(skb);
9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return NET_RX_SUCCESS;
9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else {
9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dev_kfree_skb_any(skb);
9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return NET_RX_DROP;
9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rx_error:
983198191c4a7ce4daba379608fb38b9bc5a4eedc61Krzysztof Halasa	frad->stats.rx_errors++; /* Mark error */
9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev_kfree_skb_any(skb);
9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return NET_RX_DROP;
9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fr_start(struct net_device *dev)
9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LINK
9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	printk(KERN_DEBUG "fr_start\n");
9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif
996eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (state(hdlc)->settings.lmi != LMI_NONE) {
997eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->reliable = 0;
998eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_changed = 1;
999eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->request = 0;
1000eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->fullrep_sent = 0;
1001eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->last_errors = 0xFFFFFFFF;
1002eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->n391cnt = 0;
1003eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->txseq = state(hdlc)->rxseq = 0;
1004eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1005eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		init_timer(&state(hdlc)->timer);
10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		/* First poll after 1 s */
1007eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->timer.expires = jiffies + HZ;
1008eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->timer.function = fr_timer;
1009eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->timer.data = (unsigned long)dev;
1010eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		add_timer(&state(hdlc)->timer);
10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	} else
10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		fr_set_link_state(1, dev);
10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fr_stop(struct net_device *dev)
10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG_LINK
10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	printk(KERN_DEBUG "fr_stop\n");
10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif
1022eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if (state(hdlc)->settings.lmi != LMI_NONE)
1023eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		del_timer_sync(&state(hdlc)->timer);
10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	fr_set_link_state(0, dev);
10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
10261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fr_close(struct net_device *dev)
10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
1031eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *pvc = state(hdlc)->first_pvc;
10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (pvc) {		/* Shutdown all PVCs for this FRAD */
10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->main)
10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			dev_close(pvc->main);
10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->ether)
10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			dev_close(pvc->ether);
10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc = pvc->next;
10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1042eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1043eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic void pvc_setup(struct net_device *dev)
10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->type = ARPHRD_DLCI;
10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->flags = IFF_POINTOPOINT;
10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->hard_header_len = 10;
10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->addr_len = 2;
104993f154b594fe47e4a7e5358b309add449a046cd3Eric Dumazet	dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1052991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasastatic const struct net_device_ops pvc_ops = {
1053991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa	.ndo_open       = pvc_open,
1054991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa	.ndo_stop       = pvc_close,
1055991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa	.ndo_change_mtu = hdlc_change_mtu,
1056991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa	.ndo_start_xmit = pvc_xmit,
1057991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa	.ndo_do_ioctl   = pvc_ioctl,
1058991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa};
1059991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa
1060eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
1062eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	hdlc_device *hdlc = dev_to_hdlc(frad);
1063141766cf9755e773b980238da52f5f5da5c69abeKrzysztof Halasa	pvc_device *pvc;
10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	struct net_device *dev;
10651c5cae815d19ffe02bdfda1260949ef2b1806171Jiri Pirko	int used;
10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1067eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	if ((pvc = add_pvc(frad, dlci)) == NULL) {
106812a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_warn(frad, "Memory squeeze on fr_add_pvc()\n");
10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -ENOBUFS;
10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (*get_dev_p(pvc, type))
10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -EEXIST;
10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	used = pvc_is_used(pvc);
10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1077550fd08c2cebad61c548def135f67aba284c6162Neil Horman	if (type == ARPHRD_ETHER) {
1078141766cf9755e773b980238da52f5f5da5c69abeKrzysztof Halasa		dev = alloc_netdev(0, "pvceth%d", ether_setup);
1079550fd08c2cebad61c548def135f67aba284c6162Neil Horman		dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1080550fd08c2cebad61c548def135f67aba284c6162Neil Horman	} else
1081141766cf9755e773b980238da52f5f5da5c69abeKrzysztof Halasa		dev = alloc_netdev(0, "pvc%d", pvc_setup);
10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (!dev) {
108412a3bfefc8c1e43ddb50950cb74f8a11d680567aJoe Perches		netdev_warn(frad, "Memory squeeze on fr_pvc()\n");
10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		delete_unused_pvcs(hdlc);
10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -ENOBUFS;
10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
108947eaa267a5db1729d238f977364e297b8963e115Krzysztof Halasa	if (type == ARPHRD_ETHER)
1090f2cedb63df14342ad40a8b5b324fc5d94a60b665Danny Kukawka		eth_hw_addr_random(dev);
109147eaa267a5db1729d238f977364e297b8963e115Krzysztof Halasa	else {
1092abf17ffda7b7b6c83a29d7ccea91d46065c6ca3eKrzysztof Halasa		*(__be16*)dev->dev_addr = htons(dlci);
10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dlci_to_q922(dev->broadcast, dlci);
10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
1095991990a12de42281f81b4e3a6471586d2d0caf6aKrzysztof Hałasa	dev->netdev_ops = &pvc_ops;
10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->mtu = HDLC_MAX_MTU;
10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->tx_queue_len = 0;
10982baf8a2daab65cdd3f20bfeb4676a2f6aff7c3bfWang Chen	dev->ml_priv = pvc;
10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (register_netdevice(dev) != 0) {
11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		free_netdev(dev);
11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		delete_unused_pvcs(hdlc);
11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -EIO;
11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	dev->destructor = free_netdev;
11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	*get_dev_p(pvc, type) = dev;
11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (!used) {
1109eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_changed = 1;
1110eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_pvc_count++;
11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return 0;
11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	pvc_device *pvc;
11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	struct net_device *dev;
11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if ((pvc = find_pvc(hdlc, dlci)) == NULL)
11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -ENOENT;
11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if ((dev = *get_dev_p(pvc, type)) == NULL)
11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -ENOENT;
11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (dev->flags & IFF_UP)
11291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return -EBUSY;		/* PVC in use */
11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	unregister_netdevice(dev); /* the destructor will free_netdev(dev) */
11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	*get_dev_p(pvc, type) = NULL;
11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	if (!pvc_is_used(pvc)) {
1135eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_pvc_count--;
1136eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		state(hdlc)->dce_changed = 1;
11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
11381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	delete_unused_pvcs(hdlc);
11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return 0;
11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1144eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic void fr_destroy(struct net_device *frad)
11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
1146eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	hdlc_device *hdlc = dev_to_hdlc(frad);
1147eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	pvc_device *pvc = state(hdlc)->first_pvc;
1148eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
1149eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->dce_pvc_count = 0;
1150eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	state(hdlc)->dce_changed = 1;
11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	while (pvc) {
11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc_device *next = pvc->next;
11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		/* destructors will free_netdev() main and ether */
11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->main)
11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			unregister_netdevice(pvc->main);
11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc->ether)
11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			unregister_netdevice(pvc->ether);
11601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		kfree(pvc);
11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		pvc = next;
11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
11651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1167eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic struct hdlc_proto proto = {
1168eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	.close		= fr_close,
1169eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	.start		= fr_start,
1170eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	.stop		= fr_stop,
1171eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	.detach		= fr_destroy,
1172eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	.ioctl		= fr_ioctl,
117340d25142f2ef27084fc317ac8bb5bae460c8ea72Krzysztof Halasa	.netif_rx	= fr_rx,
1174eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	.module		= THIS_MODULE,
1175eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa};
1176eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1178eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic int fr_ioctl(struct net_device *dev, struct ifreq *ifr)
11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{
11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	fr_proto __user *fr_s = ifr->ifr_settings.ifs_ifsu.fr;
11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	const size_t size = sizeof(fr_proto);
11821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	fr_proto new_settings;
11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	hdlc_device *hdlc = dev_to_hdlc(dev);
11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	fr_proto_pvc pvc;
11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	int result;
11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
11871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	switch (ifr->ifr_settings.type) {
11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	case IF_GET_PROTO:
1189eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
1190eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			return -EINVAL;
11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		ifr->ifr_settings.type = IF_PROTO_FR;
11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (ifr->ifr_settings.size < size) {
11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			ifr->ifr_settings.size = size; /* data size wanted */
11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -ENOBUFS;
11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
1196eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (copy_to_user(fr_s, &state(hdlc)->settings, size))
11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EFAULT;
11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 0;
11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	case IF_PROTO_FR:
12016f7ad1e3a24a64923538557b686d24c37b26f9d8Rudy Matela		if (!capable(CAP_NET_ADMIN))
12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EPERM;
12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12046f7ad1e3a24a64923538557b686d24c37b26f9d8Rudy Matela		if (dev->flags & IFF_UP)
12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EBUSY;
12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (copy_from_user(&new_settings, fr_s, size))
12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EFAULT;
12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (new_settings.lmi == LMI_DEFAULT)
12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			new_settings.lmi = LMI_ANSI;
12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if ((new_settings.lmi != LMI_NONE &&
12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		     new_settings.lmi != LMI_ANSI &&
1215b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		     new_settings.lmi != LMI_CCITT &&
1216b3dd65f958354226275522b5a64157834bdc5415Krzysztof Halasa		     new_settings.lmi != LMI_CISCO) ||
12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    new_settings.t391 < 1 ||
12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    new_settings.t392 < 2 ||
12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    new_settings.n391 < 1 ||
12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    new_settings.n392 < 1 ||
12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    new_settings.n393 < new_settings.n392 ||
12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    new_settings.n393 > 32 ||
12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    (new_settings.dce != 0 &&
12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		     new_settings.dce != 1))
12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EINVAL;
12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (result)
12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return result;
12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
1231eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (dev_to_hdlc(dev)->proto != &proto) { /* Different proto */
123240d25142f2ef27084fc317ac8bb5bae460c8ea72Krzysztof Halasa			result = attach_hdlc_protocol(dev, &proto,
1233eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa						      sizeof(struct frad_state));
1234eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			if (result)
1235eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa				return result;
1236eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->first_pvc = NULL;
1237eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			state(hdlc)->dce_pvc_count = 0;
12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		}
1239eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		memcpy(&state(hdlc)->settings, &new_settings, size);
12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		dev->type = ARPHRD_FRAD;
12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		return 0;
12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	case IF_PROTO_FR_ADD_PVC:
12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	case IF_PROTO_FR_DEL_PVC:
12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	case IF_PROTO_FR_ADD_ETH_PVC:
12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	case IF_PROTO_FR_DEL_ETH_PVC:
1247eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa		if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
1248eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa			return -EINVAL;
1249eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
12506f7ad1e3a24a64923538557b686d24c37b26f9d8Rudy Matela		if (!capable(CAP_NET_ADMIN))
12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EPERM;
12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (copy_from_user(&pvc, ifr->ifr_settings.ifs_ifsu.fr_pvc,
12541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds				   sizeof(fr_proto_pvc)))
12551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EFAULT;
12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (pvc.dlci <= 0 || pvc.dlci >= 1024)
12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return -EINVAL;	/* Only 10 bits, DLCI 0 reserved */
12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (ifr->ifr_settings.type == IF_PROTO_FR_ADD_ETH_PVC ||
12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    ifr->ifr_settings.type == IF_PROTO_FR_DEL_ETH_PVC)
12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			result = ARPHRD_ETHER; /* bridged Ethernet device */
12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		else
12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			result = ARPHRD_DLCI;
12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		if (ifr->ifr_settings.type == IF_PROTO_FR_ADD_PVC ||
12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		    ifr->ifr_settings.type == IF_PROTO_FR_ADD_ETH_PVC)
12681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return fr_add_pvc(dev, pvc.dlci, result);
12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds		else
12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds			return fr_del_pvc(hdlc, pvc.dlci, result);
12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	}
12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds
12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds	return -EINVAL;
12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}
1275eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1276eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1277eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic int __init mod_init(void)
1278eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa{
1279eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	register_hdlc_protocol(&proto);
1280eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	return 0;
1281eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa}
1282eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1283eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1284eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasastatic void __exit mod_exit(void)
1285eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa{
1286eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa	unregister_hdlc_protocol(&proto);
1287eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa}
1288eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1289eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1290eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasamodule_init(mod_init);
1291eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasamodule_exit(mod_exit);
1292eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof Halasa
1293eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof HalasaMODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
1294eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof HalasaMODULE_DESCRIPTION("Frame-Relay protocol support for generic HDLC");
1295eb2a2fd91f7c8a53b15063d6f08cf22b9a56cbfbKrzysztof HalasaMODULE_LICENSE("GPL v2");
1296