* Generic HDLC support routines for Linux
* Frame Relay support
*
- * Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
active = open and "link reliable"
exist = new = not used
+ CCITT LMI: ITU-T Q.933 Annex A
+ ANSI LMI: ANSI T1.617 Annex D
+ CISCO LMI: the original, aka "Gang of Four" LMI
+
*/
#include <linux/module.h>
#undef DEBUG_PKT
#undef DEBUG_ECN
#undef DEBUG_LINK
+#undef DEBUG_PROTO
+#undef DEBUG_PVC
+
+#define FR_UI 0x03
+#define FR_PAD 0x00
+
+#define NLPID_IP 0xCC
+#define NLPID_IPV6 0x8E
+#define NLPID_SNAP 0x80
+#define NLPID_PAD 0x00
+#define NLPID_CCITT_ANSI_LMI 0x08
+#define NLPID_CISCO_LMI 0x09
+
+
+#define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */
+#define LMI_CISCO_DLCI 1023
+
+#define LMI_CALLREF 0x00 /* Call Reference */
+#define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI locking shift */
+#define LMI_ANSI_CISCO_REPTYPE 0x01 /* report type */
+#define LMI_CCITT_REPTYPE 0x51
+#define LMI_ANSI_CISCO_ALIVE 0x03 /* keep alive */
+#define LMI_CCITT_ALIVE 0x53
+#define LMI_ANSI_CISCO_PVCSTAT 0x07 /* PVC status */
+#define LMI_CCITT_PVCSTAT 0x57
+
+#define LMI_FULLREP 0x00 /* full report */
+#define LMI_INTEGRITY 0x01 /* link integrity report */
+#define LMI_SINGLE 0x02 /* single PVC report */
-#define MAXLEN_LMISTAT 20 /* max size of status enquiry frame */
-
-#define PVC_STATE_NEW 0x01
-#define PVC_STATE_ACTIVE 0x02
-#define PVC_STATE_FECN 0x08 /* FECN condition */
-#define PVC_STATE_BECN 0x10 /* BECN condition */
-
-
-#define FR_UI 0x03
-#define FR_PAD 0x00
-
-#define NLPID_IP 0xCC
-#define NLPID_IPV6 0x8E
-#define NLPID_SNAP 0x80
-#define NLPID_PAD 0x00
-#define NLPID_Q933 0x08
-
-
-#define LMI_DLCI 0 /* LMI DLCI */
-#define LMI_PROTO 0x08
-#define LMI_CALLREF 0x00 /* Call Reference */
-#define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI lockshift */
-#define LMI_REPTYPE 1 /* report type */
-#define LMI_CCITT_REPTYPE 0x51
-#define LMI_ALIVE 3 /* keep alive */
-#define LMI_CCITT_ALIVE 0x53
-#define LMI_PVCSTAT 7 /* pvc status */
-#define LMI_CCITT_PVCSTAT 0x57
-#define LMI_FULLREP 0 /* full report */
-#define LMI_INTEGRITY 1 /* link integrity report */
-#define LMI_SINGLE 2 /* single pvc report */
#define LMI_STATUS_ENQUIRY 0x75
#define LMI_STATUS 0x7D /* reply */
#define LMI_REPT_LEN 1 /* report type element length */
#define LMI_INTEG_LEN 2 /* link integrity element length */
-#define LMI_LENGTH 13 /* standard LMI frame length */
-#define LMI_ANSI_LENGTH 14
+#define LMI_CCITT_CISCO_LENGTH 13 /* LMI frame lengths */
+#define LMI_ANSI_LENGTH 14
typedef struct {
}__attribute__ ((packed)) fr_hdr;
+typedef struct pvc_device_struct {
+ struct net_device *frad;
+ struct net_device *main;
+ struct net_device *ether; /* bridged Ethernet interface */
+ struct pvc_device_struct *next; /* Sorted in ascending DLCI order */
+ int dlci;
+ int open_count;
+
+ struct {
+ unsigned int new: 1;
+ unsigned int active: 1;
+ unsigned int exist: 1;
+ unsigned int deleted: 1;
+ unsigned int fecn: 1;
+ unsigned int becn: 1;
+ unsigned int bandwidth; /* Cisco LMI reporting only */
+ }state;
+}pvc_device;
+
+
+struct frad_state {
+ fr_proto settings;
+ pvc_device *first_pvc;
+ int dce_pvc_count;
+
+ struct timer_list timer;
+ unsigned long last_poll;
+ int reliable;
+ int dce_changed;
+ int request;
+ int fullrep_sent;
+ u32 last_errors; /* last errors bit list */
+ u8 n391cnt;
+ u8 txseq; /* TX sequence number */
+ u8 rxseq; /* RX sequence number */
+};
+
+
+static int fr_ioctl(struct net_device *dev, struct ifreq *ifr);
+
+
static inline u16 q922_to_dlci(u8 *hdr)
{
return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4);
}
-
static inline void dlci_to_q922(u8 *hdr, u16 dlci)
{
hdr[0] = (dlci >> 2) & 0xFC;
}
+static inline struct frad_state * state(hdlc_device *hdlc)
+{
+ return(struct frad_state *)(hdlc->state);
+}
+
+
+static __inline__ pvc_device* dev_to_pvc(struct net_device *dev)
+{
+ return dev->priv;
+}
+
static inline pvc_device* find_pvc(hdlc_device *hdlc, u16 dlci)
{
- pvc_device *pvc = hdlc->state.fr.first_pvc;
+ pvc_device *pvc = state(hdlc)->first_pvc;
while (pvc) {
if (pvc->dlci == dlci)
}
-static inline pvc_device* add_pvc(struct net_device *dev, u16 dlci)
+static pvc_device* add_pvc(struct net_device *dev, u16 dlci)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
- pvc_device *pvc, **pvc_p = &hdlc->state.fr.first_pvc;
+ pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
while (*pvc_p) {
if ((*pvc_p)->dlci == dlci)
}
pvc = kmalloc(sizeof(pvc_device), GFP_ATOMIC);
+#ifdef DEBUG_PVC
+ printk(KERN_DEBUG "add_pvc: allocated pvc %p, frad %p\n", pvc, dev);
+#endif
if (!pvc)
return NULL;
memset(pvc, 0, sizeof(pvc_device));
pvc->dlci = dlci;
- pvc->master = dev;
+ pvc->frad = dev;
pvc->next = *pvc_p; /* Put it in the chain */
*pvc_p = pvc;
return pvc;
static inline int pvc_is_used(pvc_device *pvc)
{
- return pvc->main != NULL || pvc->ether != NULL;
+ return pvc->main || pvc->ether;
}
static inline void delete_unused_pvcs(hdlc_device *hdlc)
{
- pvc_device **pvc_p = &hdlc->state.fr.first_pvc;
+ pvc_device **pvc_p = &state(hdlc)->first_pvc;
while (*pvc_p) {
if (!pvc_is_used(*pvc_p)) {
pvc_device *pvc = *pvc_p;
+#ifdef DEBUG_PVC
+ printk(KERN_DEBUG "freeing unused pvc: %p\n", pvc);
+#endif
*pvc_p = pvc->next;
kfree(pvc);
continue;
}
-static inline u16 status_to_dlci(u8 *status, int *active, int *new)
-{
- *new = (status[2] & 0x08) ? 1 : 0;
- *active = (status[2] & 0x02) ? 1 : 0;
-
- return ((status[0] & 0x3F) << 4) | ((status[1] & 0x78) >> 3);
-}
-
-
-static inline void dlci_to_status(u16 dlci, u8 *status, int active, int new)
-{
- status[0] = (dlci >> 4) & 0x3F;
- status[1] = ((dlci << 3) & 0x78) | 0x80;
- status[2] = 0x80;
-
- if (new)
- status[2] |= 0x08;
- else if (active)
- status[2] |= 0x02;
-}
-
-
-
static int fr_hard_header(struct sk_buff **skb_p, u16 dlci)
{
u16 head_len;
struct sk_buff *skb = *skb_p;
switch (skb->protocol) {
- case __constant_ntohs(ETH_P_IP):
+ case __constant_ntohs(NLPID_CCITT_ANSI_LMI):
head_len = 4;
skb_push(skb, head_len);
- skb->data[3] = NLPID_IP;
+ skb->data[3] = NLPID_CCITT_ANSI_LMI;
break;
- case __constant_ntohs(ETH_P_IPV6):
+ case __constant_ntohs(NLPID_CISCO_LMI):
head_len = 4;
skb_push(skb, head_len);
- skb->data[3] = NLPID_IPV6;
+ skb->data[3] = NLPID_CISCO_LMI;
break;
- case __constant_ntohs(LMI_PROTO):
+ case __constant_ntohs(ETH_P_IP):
head_len = 4;
skb_push(skb, head_len);
- skb->data[3] = LMI_PROTO;
+ skb->data[3] = NLPID_IP;
+ break;
+
+ case __constant_ntohs(ETH_P_IPV6):
+ head_len = 4;
+ skb_push(skb, head_len);
+ skb->data[3] = NLPID_IPV6;
break;
case __constant_ntohs(ETH_P_802_3):
{
pvc_device *pvc = dev_to_pvc(dev);
- if ((pvc->master->flags & IFF_UP) == 0)
- return -EIO; /* Master must be UP in order to activate PVC */
+ if ((pvc->frad->flags & IFF_UP) == 0)
+ return -EIO; /* Frad must be UP in order to activate PVC */
if (pvc->open_count++ == 0) {
- hdlc_device *hdlc = dev_to_hdlc(pvc->master);
- if (hdlc->state.fr.settings.lmi == LMI_NONE)
- pvc->state.active = hdlc->carrier;
+ hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
+ if (state(hdlc)->settings.lmi == LMI_NONE)
+ pvc->state.active = netif_carrier_ok(pvc->frad);
pvc_carrier(pvc->state.active, pvc);
- hdlc->state.fr.dce_changed = 1;
+ state(hdlc)->dce_changed = 1;
}
return 0;
}
pvc_device *pvc = dev_to_pvc(dev);
if (--pvc->open_count == 0) {
- hdlc_device *hdlc = dev_to_hdlc(pvc->master);
- if (hdlc->state.fr.settings.lmi == LMI_NONE)
+ hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
+ if (state(hdlc)->settings.lmi == LMI_NONE)
pvc->state.active = 0;
- if (hdlc->state.fr.settings.dce) {
- hdlc->state.fr.dce_changed = 1;
+ if (state(hdlc)->settings.dce) {
+ state(hdlc)->dce_changed = 1;
pvc->state.active = 0;
}
}
-int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+static int pvc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
pvc_device *pvc = dev_to_pvc(dev);
fr_proto_pvc_info info;
}
info.dlci = pvc->dlci;
- memcpy(info.master, pvc->master->name, IFNAMSIZ);
+ memcpy(info.master, pvc->frad->name, IFNAMSIZ);
if (copy_to_user(ifr->ifr_settings.ifs_ifsu.fr_pvc_info,
&info, sizeof(info)))
return -EFAULT;
static inline struct net_device_stats *pvc_get_stats(struct net_device *dev)
{
- return netdev_priv(dev);
+ return &dev_to_desc(dev)->stats;
}
stats->tx_packets++;
if (pvc->state.fecn) /* TX Congestion counter */
stats->tx_compressed++;
- skb->dev = pvc->master;
+ skb->dev = pvc->frad;
dev_queue_xmit(skb);
return 0;
}
static inline void fr_log_dlci_active(pvc_device *pvc)
{
printk(KERN_INFO "%s: DLCI %d [%s%s%s]%s %s\n",
- pvc->master->name,
+ pvc->frad->name,
pvc->dlci,
pvc->main ? pvc->main->name : "",
pvc->main && pvc->ether ? " " : "",
}
-
static void fr_lmi_send(struct net_device *dev, int fullrep)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
struct sk_buff *skb;
- pvc_device *pvc = hdlc->state.fr.first_pvc;
- int len = (hdlc->state.fr.settings.lmi == LMI_ANSI) ? LMI_ANSI_LENGTH
- : LMI_LENGTH;
- int stat_len = 3;
+ pvc_device *pvc = state(hdlc)->first_pvc;
+ int lmi = state(hdlc)->settings.lmi;
+ int dce = state(hdlc)->settings.dce;
+ int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH;
+ int stat_len = (lmi == LMI_CISCO) ? 6 : 3;
u8 *data;
int i = 0;
- if (hdlc->state.fr.settings.dce && fullrep) {
- len += hdlc->state.fr.dce_pvc_count * (2 + stat_len);
+ if (dce && fullrep) {
+ len += state(hdlc)->dce_pvc_count * (2 + stat_len);
if (len > HDLC_MAX_MRU) {
printk(KERN_WARNING "%s: Too many PVCs while sending "
"LMI full report\n", dev->name);
}
memset(skb->data, 0, len);
skb_reserve(skb, 4);
- skb->protocol = __constant_htons(LMI_PROTO);
- fr_hard_header(&skb, LMI_DLCI);
+ if (lmi == LMI_CISCO) {
+ skb->protocol = __constant_htons(NLPID_CISCO_LMI);
+ fr_hard_header(&skb, LMI_CISCO_DLCI);
+ } else {
+ skb->protocol = __constant_htons(NLPID_CCITT_ANSI_LMI);
+ fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI);
+ }
data = skb->tail;
data[i++] = LMI_CALLREF;
- data[i++] = hdlc->state.fr.settings.dce
- ? LMI_STATUS : LMI_STATUS_ENQUIRY;
- if (hdlc->state.fr.settings.lmi == LMI_ANSI)
+ data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY;
+ if (lmi == LMI_ANSI)
data[i++] = LMI_ANSI_LOCKSHIFT;
- data[i++] = (hdlc->state.fr.settings.lmi == LMI_CCITT)
- ? LMI_CCITT_REPTYPE : LMI_REPTYPE;
+ data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
+ LMI_ANSI_CISCO_REPTYPE;
data[i++] = LMI_REPT_LEN;
data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY;
-
- data[i++] = (hdlc->state.fr.settings.lmi == LMI_CCITT)
- ? LMI_CCITT_ALIVE : LMI_ALIVE;
+ data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE;
data[i++] = LMI_INTEG_LEN;
- data[i++] = hdlc->state.fr.txseq =fr_lmi_nextseq(hdlc->state.fr.txseq);
- data[i++] = hdlc->state.fr.rxseq;
+ data[i++] = state(hdlc)->txseq =
+ fr_lmi_nextseq(state(hdlc)->txseq);
+ data[i++] = state(hdlc)->rxseq;
- if (hdlc->state.fr.settings.dce && fullrep) {
+ if (dce && fullrep) {
while (pvc) {
- data[i++] = (hdlc->state.fr.settings.lmi == LMI_CCITT)
- ? LMI_CCITT_PVCSTAT : LMI_PVCSTAT;
+ data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
+ LMI_ANSI_CISCO_PVCSTAT;
data[i++] = stat_len;
/* LMI start/restart */
- if (hdlc->state.fr.reliable && !pvc->state.exist) {
+ if (state(hdlc)->reliable && !pvc->state.exist) {
pvc->state.exist = pvc->state.new = 1;
fr_log_dlci_active(pvc);
}
fr_log_dlci_active(pvc);
}
- dlci_to_status(pvc->dlci, data + i,
- pvc->state.active, pvc->state.new);
+ if (lmi == LMI_CISCO) {
+ data[i] = pvc->dlci >> 8;
+ data[i + 1] = pvc->dlci & 0xFF;
+ } else {
+ data[i] = (pvc->dlci >> 4) & 0x3F;
+ data[i + 1] = ((pvc->dlci << 3) & 0x78) | 0x80;
+ data[i + 2] = 0x80;
+ }
+
+ if (pvc->state.new)
+ data[i + 2] |= 0x08;
+ else if (pvc->state.active)
+ data[i + 2] |= 0x02;
+
i += stat_len;
pvc = pvc->next;
}
static void fr_set_link_state(int reliable, struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
- pvc_device *pvc = hdlc->state.fr.first_pvc;
+ pvc_device *pvc = state(hdlc)->first_pvc;
- hdlc->state.fr.reliable = reliable;
+ state(hdlc)->reliable = reliable;
if (reliable) {
- if (!netif_carrier_ok(dev))
- netif_carrier_on(dev);
+ netif_dormant_off(dev);
+ state(hdlc)->n391cnt = 0; /* Request full status */
+ state(hdlc)->dce_changed = 1;
- hdlc->state.fr.n391cnt = 0; /* Request full status */
- hdlc->state.fr.dce_changed = 1;
-
- if (hdlc->state.fr.settings.lmi == LMI_NONE) {
+ if (state(hdlc)->settings.lmi == LMI_NONE) {
while (pvc) { /* Activate all PVCs */
pvc_carrier(1, pvc);
pvc->state.exist = pvc->state.active = 1;
}
}
} else {
- if (netif_carrier_ok(dev))
- netif_carrier_off(dev);
-
+ netif_dormant_on(dev);
while (pvc) { /* Deactivate all PVCs */
pvc_carrier(0, pvc);
pvc->state.exist = pvc->state.active = 0;
pvc->state.new = 0;
+ if (!state(hdlc)->settings.dce)
+ pvc->state.bandwidth = 0;
pvc = pvc->next;
}
}
}
-
static void fr_timer(unsigned long arg)
{
struct net_device *dev = (struct net_device *)arg;
int i, cnt = 0, reliable;
u32 list;
- if (hdlc->state.fr.settings.dce)
- reliable = hdlc->state.fr.request &&
- time_before(jiffies, hdlc->state.fr.last_poll +
- hdlc->state.fr.settings.t392 * HZ);
- else {
- hdlc->state.fr.last_errors <<= 1; /* Shift the list */
- if (hdlc->state.fr.request) {
- if (hdlc->state.fr.reliable)
+ if (state(hdlc)->settings.dce) {
+ reliable = state(hdlc)->request &&
+ time_before(jiffies, state(hdlc)->last_poll +
+ state(hdlc)->settings.t392 * HZ);
+ state(hdlc)->request = 0;
+ } else {
+ state(hdlc)->last_errors <<= 1; /* Shift the list */
+ if (state(hdlc)->request) {
+ if (state(hdlc)->reliable)
printk(KERN_INFO "%s: No LMI status reply "
"received\n", dev->name);
- hdlc->state.fr.last_errors |= 1;
+ state(hdlc)->last_errors |= 1;
}
- list = hdlc->state.fr.last_errors;
- for (i = 0; i < hdlc->state.fr.settings.n393; i++, list >>= 1)
+ list = state(hdlc)->last_errors;
+ for (i = 0; i < state(hdlc)->settings.n393; i++, list >>= 1)
cnt += (list & 1); /* errors count */
- reliable = (cnt < hdlc->state.fr.settings.n392);
+ reliable = (cnt < state(hdlc)->settings.n392);
}
- if (hdlc->state.fr.reliable != reliable) {
+ if (state(hdlc)->reliable != reliable) {
printk(KERN_INFO "%s: Link %sreliable\n", dev->name,
reliable ? "" : "un");
fr_set_link_state(reliable, dev);
}
- if (hdlc->state.fr.settings.dce)
- hdlc->state.fr.timer.expires = jiffies +
- hdlc->state.fr.settings.t392 * HZ;
+ if (state(hdlc)->settings.dce)
+ state(hdlc)->timer.expires = jiffies +
+ state(hdlc)->settings.t392 * HZ;
else {
- if (hdlc->state.fr.n391cnt)
- hdlc->state.fr.n391cnt--;
+ if (state(hdlc)->n391cnt)
+ state(hdlc)->n391cnt--;
- fr_lmi_send(dev, hdlc->state.fr.n391cnt == 0);
+ fr_lmi_send(dev, state(hdlc)->n391cnt == 0);
- hdlc->state.fr.last_poll = jiffies;
- hdlc->state.fr.request = 1;
- hdlc->state.fr.timer.expires = jiffies +
- hdlc->state.fr.settings.t391 * HZ;
+ state(hdlc)->last_poll = jiffies;
+ state(hdlc)->request = 1;
+ state(hdlc)->timer.expires = jiffies +
+ state(hdlc)->settings.t391 * HZ;
}
- hdlc->state.fr.timer.function = fr_timer;
- hdlc->state.fr.timer.data = arg;
- add_timer(&hdlc->state.fr.timer);
+ state(hdlc)->timer.function = fr_timer;
+ state(hdlc)->timer.data = arg;
+ add_timer(&state(hdlc)->timer);
}
-
static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
- int stat_len;
pvc_device *pvc;
- int reptype = -1, error, no_ram;
u8 rxseq, txseq;
- int i;
+ int lmi = state(hdlc)->settings.lmi;
+ int dce = state(hdlc)->settings.dce;
+ int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i;
- if (skb->len < ((hdlc->state.fr.settings.lmi == LMI_ANSI)
- ? LMI_ANSI_LENGTH : LMI_LENGTH)) {
+ if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH :
+ LMI_CCITT_CISCO_LENGTH)) {
printk(KERN_INFO "%s: Short LMI frame\n", dev->name);
return 1;
}
- if (skb->data[5] != (!hdlc->state.fr.settings.dce ?
- LMI_STATUS : LMI_STATUS_ENQUIRY)) {
- printk(KERN_INFO "%s: LMI msgtype=%x, Not LMI status %s\n",
- dev->name, skb->data[2],
- hdlc->state.fr.settings.dce ? "enquiry" : "reply");
+ if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI :
+ NLPID_CCITT_ANSI_LMI)) {
+ printk(KERN_INFO "%s: Received non-LMI frame with LMI DLCI\n",
+ dev->name);
+ return 1;
+ }
+
+ if (skb->data[4] != LMI_CALLREF) {
+ printk(KERN_INFO "%s: Invalid LMI Call reference (0x%02X)\n",
+ dev->name, skb->data[4]);
return 1;
}
- i = (hdlc->state.fr.settings.lmi == LMI_ANSI) ? 7 : 6;
+ if (skb->data[5] != (dce ? LMI_STATUS_ENQUIRY : LMI_STATUS)) {
+ printk(KERN_INFO "%s: Invalid LMI Message type (0x%02X)\n",
+ dev->name, skb->data[5]);
+ return 1;
+ }
- if (skb->data[i] !=
- ((hdlc->state.fr.settings.lmi == LMI_CCITT)
- ? LMI_CCITT_REPTYPE : LMI_REPTYPE)) {
- printk(KERN_INFO "%s: Not a report type=%x\n",
+ if (lmi == LMI_ANSI) {
+ if (skb->data[6] != LMI_ANSI_LOCKSHIFT) {
+ printk(KERN_INFO "%s: Not ANSI locking shift in LMI"
+ " message (0x%02X)\n", dev->name, skb->data[6]);
+ return 1;
+ }
+ i = 7;
+ } else
+ i = 6;
+
+ if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
+ LMI_ANSI_CISCO_REPTYPE)) {
+ printk(KERN_INFO "%s: Not an LMI Report type IE (0x%02X)\n",
dev->name, skb->data[i]);
return 1;
}
- i++;
- i++; /* Skip length field */
+ if (skb->data[++i] != LMI_REPT_LEN) {
+ printk(KERN_INFO "%s: Invalid LMI Report type IE length"
+ " (%u)\n", dev->name, skb->data[i]);
+ return 1;
+ }
- reptype = skb->data[i++];
+ reptype = skb->data[++i];
+ if (reptype != LMI_INTEGRITY && reptype != LMI_FULLREP) {
+ printk(KERN_INFO "%s: Unsupported LMI Report type (0x%02X)\n",
+ dev->name, reptype);
+ return 1;
+ }
- if (skb->data[i]!=
- ((hdlc->state.fr.settings.lmi == LMI_CCITT)
- ? LMI_CCITT_ALIVE : LMI_ALIVE)) {
- printk(KERN_INFO "%s: Unsupported status element=%x\n",
- dev->name, skb->data[i]);
+ if (skb->data[++i] != (lmi == LMI_CCITT ? LMI_CCITT_ALIVE :
+ LMI_ANSI_CISCO_ALIVE)) {
+ printk(KERN_INFO "%s: Not an LMI Link integrity verification"
+ " IE (0x%02X)\n", dev->name, skb->data[i]);
return 1;
}
- i++;
- i++; /* Skip length field */
+ if (skb->data[++i] != LMI_INTEG_LEN) {
+ printk(KERN_INFO "%s: Invalid LMI Link integrity verification"
+ " IE length (%u)\n", dev->name, skb->data[i]);
+ return 1;
+ }
+ i++;
- hdlc->state.fr.rxseq = skb->data[i++]; /* TX sequence from peer */
+ state(hdlc)->rxseq = skb->data[i++]; /* TX sequence from peer */
rxseq = skb->data[i++]; /* Should confirm our sequence */
- txseq = hdlc->state.fr.txseq;
+ txseq = state(hdlc)->txseq;
- if (hdlc->state.fr.settings.dce) {
- if (reptype != LMI_FULLREP && reptype != LMI_INTEGRITY) {
- printk(KERN_INFO "%s: Unsupported report type=%x\n",
- dev->name, reptype);
- return 1;
- }
- hdlc->state.fr.last_poll = jiffies;
- }
+ if (dce)
+ state(hdlc)->last_poll = jiffies;
error = 0;
- if (!hdlc->state.fr.reliable)
+ if (!state(hdlc)->reliable)
error = 1;
- if (rxseq == 0 || rxseq != txseq) {
- hdlc->state.fr.n391cnt = 0; /* Ask for full report next time */
+ if (rxseq == 0 || rxseq != txseq) { /* Ask for full report next time */
+ state(hdlc)->n391cnt = 0;
error = 1;
}
- if (hdlc->state.fr.settings.dce) {
- if (hdlc->state.fr.fullrep_sent && !error) {
+ if (dce) {
+ if (state(hdlc)->fullrep_sent && !error) {
/* Stop sending full report - the last one has been confirmed by DTE */
- hdlc->state.fr.fullrep_sent = 0;
- pvc = hdlc->state.fr.first_pvc;
+ state(hdlc)->fullrep_sent = 0;
+ pvc = state(hdlc)->first_pvc;
while (pvc) {
if (pvc->state.new) {
pvc->state.new = 0;
/* Tell DTE that new PVC is now active */
- hdlc->state.fr.dce_changed = 1;
+ state(hdlc)->dce_changed = 1;
}
pvc = pvc->next;
}
}
- if (hdlc->state.fr.dce_changed) {
+ if (state(hdlc)->dce_changed) {
reptype = LMI_FULLREP;
- hdlc->state.fr.fullrep_sent = 1;
- hdlc->state.fr.dce_changed = 0;
+ state(hdlc)->fullrep_sent = 1;
+ state(hdlc)->dce_changed = 0;
}
+ state(hdlc)->request = 1; /* got request */
fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0);
return 0;
}
/* DTE */
- hdlc->state.fr.request = 0; /* got response, no request pending */
+ state(hdlc)->request = 0; /* got response, no request pending */
if (error)
return 0;
if (reptype != LMI_FULLREP)
return 0;
- stat_len = 3;
- pvc = hdlc->state.fr.first_pvc;
+ pvc = state(hdlc)->first_pvc;
while (pvc) {
pvc->state.deleted = 1;
no_ram = 0;
while (skb->len >= i + 2 + stat_len) {
u16 dlci;
+ u32 bw;
unsigned int active, new;
- if (skb->data[i] != ((hdlc->state.fr.settings.lmi == LMI_CCITT)
- ? LMI_CCITT_PVCSTAT : LMI_PVCSTAT)) {
- printk(KERN_WARNING "%s: Invalid PVCSTAT ID: %x\n",
- dev->name, skb->data[i]);
+ if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
+ LMI_ANSI_CISCO_PVCSTAT)) {
+ printk(KERN_INFO "%s: Not an LMI PVC status IE"
+ " (0x%02X)\n", dev->name, skb->data[i]);
return 1;
}
- i++;
- if (skb->data[i] != stat_len) {
- printk(KERN_WARNING "%s: Invalid PVCSTAT length: %x\n",
- dev->name, skb->data[i]);
+ if (skb->data[++i] != stat_len) {
+ printk(KERN_INFO "%s: Invalid LMI PVC status IE length"
+ " (%u)\n", dev->name, skb->data[i]);
return 1;
}
i++;
- dlci = status_to_dlci(skb->data + i, &active, &new);
+ new = !! (skb->data[i + 2] & 0x08);
+ active = !! (skb->data[i + 2] & 0x02);
+ if (lmi == LMI_CISCO) {
+ dlci = (skb->data[i] << 8) | skb->data[i + 1];
+ bw = (skb->data[i + 3] << 16) |
+ (skb->data[i + 4] << 8) |
+ (skb->data[i + 5]);
+ } else {
+ dlci = ((skb->data[i] & 0x3F) << 4) |
+ ((skb->data[i + 1] & 0x78) >> 3);
+ bw = 0;
+ }
pvc = add_pvc(dev, dlci);
pvc->state.deleted = 0;
if (active != pvc->state.active ||
new != pvc->state.new ||
+ bw != pvc->state.bandwidth ||
!pvc->state.exist) {
pvc->state.new = new;
pvc->state.active = active;
+ pvc->state.bandwidth = bw;
pvc_carrier(active, pvc);
fr_log_dlci_active(pvc);
}
i += stat_len;
}
- pvc = hdlc->state.fr.first_pvc;
+ pvc = state(hdlc)->first_pvc;
while (pvc) {
if (pvc->state.deleted && pvc->state.exist) {
pvc_carrier(0, pvc);
pvc->state.active = pvc->state.new = 0;
pvc->state.exist = 0;
+ pvc->state.bandwidth = 0;
fr_log_dlci_active(pvc);
}
pvc = pvc->next;
}
/* Next full report after N391 polls */
- hdlc->state.fr.n391cnt = hdlc->state.fr.settings.n391;
+ state(hdlc)->n391cnt = state(hdlc)->settings.n391;
return 0;
}
-
static int fr_rx(struct sk_buff *skb)
{
- struct net_device *ndev = skb->dev;
- hdlc_device *hdlc = dev_to_hdlc(ndev);
+ struct net_device *frad = skb->dev;
+ hdlc_device *hdlc = dev_to_hdlc(frad);
fr_hdr *fh = (fr_hdr*)skb->data;
u8 *data = skb->data;
u16 dlci;
dlci = q922_to_dlci(skb->data);
- if (dlci == LMI_DLCI) {
- if (hdlc->state.fr.settings.lmi == LMI_NONE)
- goto rx_error; /* LMI packet with no LMI? */
-
- if (data[3] == LMI_PROTO) {
- if (fr_lmi_recv(ndev, skb))
- goto rx_error;
- else {
- dev_kfree_skb_any(skb);
- return NET_RX_SUCCESS;
- }
- }
-
- printk(KERN_INFO "%s: Received non-LMI frame with LMI DLCI\n",
- ndev->name);
- goto rx_error;
+ if ((dlci == LMI_CCITT_ANSI_DLCI &&
+ (state(hdlc)->settings.lmi == LMI_ANSI ||
+ state(hdlc)->settings.lmi == LMI_CCITT)) ||
+ (dlci == LMI_CISCO_DLCI &&
+ state(hdlc)->settings.lmi == LMI_CISCO)) {
+ if (fr_lmi_recv(frad, skb))
+ goto rx_error;
+ dev_kfree_skb_any(skb);
+ return NET_RX_SUCCESS;
}
pvc = find_pvc(hdlc, dlci);
if (!pvc) {
#ifdef DEBUG_PKT
printk(KERN_INFO "%s: No PVC for received frame's DLCI %d\n",
- ndev->name, dlci);
+ frad->name, dlci);
#endif
dev_kfree_skb_any(skb);
return NET_RX_DROP;
if (pvc->state.fecn != fh->fecn) {
#ifdef DEBUG_ECN
- printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", ndev->name,
+ printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", frad->name,
dlci, fh->fecn ? "N" : "FF");
#endif
pvc->state.fecn ^= 1;
if (pvc->state.becn != fh->becn) {
#ifdef DEBUG_ECN
- printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", ndev->name,
+ printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", frad->name,
dlci, fh->becn ? "N" : "FF");
#endif
pvc->state.becn ^= 1;
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
- hdlc->stats.rx_dropped++;
+ dev_to_desc(frad)->stats.rx_dropped++;
return NET_RX_DROP;
}
default:
printk(KERN_INFO "%s: Unsupported protocol, OUI=%x "
- "PID=%x\n", ndev->name, oui, pid);
+ "PID=%x\n", frad->name, oui, pid);
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}
} else {
printk(KERN_INFO "%s: Unsupported protocol, NLPID=%x "
- "length = %i\n", ndev->name, data[3], skb->len);
+ "length = %i\n", frad->name, data[3], skb->len);
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}
}
rx_error:
- hdlc->stats.rx_errors++; /* Mark error */
+ dev_to_desc(frad)->stats.rx_errors++; /* Mark error */
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}
#ifdef DEBUG_LINK
printk(KERN_DEBUG "fr_start\n");
#endif
- if (hdlc->state.fr.settings.lmi != LMI_NONE) {
- hdlc->state.fr.reliable = 0;
- hdlc->state.fr.dce_changed = 1;
- hdlc->state.fr.request = 0;
- hdlc->state.fr.fullrep_sent = 0;
- hdlc->state.fr.last_errors = 0xFFFFFFFF;
- hdlc->state.fr.n391cnt = 0;
- hdlc->state.fr.txseq = hdlc->state.fr.rxseq = 0;
-
- init_timer(&hdlc->state.fr.timer);
+ if (state(hdlc)->settings.lmi != LMI_NONE) {
+ state(hdlc)->reliable = 0;
+ state(hdlc)->dce_changed = 1;
+ state(hdlc)->request = 0;
+ state(hdlc)->fullrep_sent = 0;
+ state(hdlc)->last_errors = 0xFFFFFFFF;
+ state(hdlc)->n391cnt = 0;
+ state(hdlc)->txseq = state(hdlc)->rxseq = 0;
+
+ init_timer(&state(hdlc)->timer);
/* First poll after 1 s */
- hdlc->state.fr.timer.expires = jiffies + HZ;
- hdlc->state.fr.timer.function = fr_timer;
- hdlc->state.fr.timer.data = (unsigned long)dev;
- add_timer(&hdlc->state.fr.timer);
+ state(hdlc)->timer.expires = jiffies + HZ;
+ state(hdlc)->timer.function = fr_timer;
+ state(hdlc)->timer.data = (unsigned long)dev;
+ add_timer(&state(hdlc)->timer);
} else
fr_set_link_state(1, dev);
}
-
static void fr_stop(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
#ifdef DEBUG_LINK
printk(KERN_DEBUG "fr_stop\n");
#endif
- if (hdlc->state.fr.settings.lmi != LMI_NONE)
- del_timer_sync(&hdlc->state.fr.timer);
+ if (state(hdlc)->settings.lmi != LMI_NONE)
+ del_timer_sync(&state(hdlc)->timer);
fr_set_link_state(0, dev);
}
-
static void fr_close(struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
- pvc_device *pvc = hdlc->state.fr.first_pvc;
+ pvc_device *pvc = state(hdlc)->first_pvc;
while (pvc) { /* Shutdown all PVCs for this FRAD */
if (pvc->main)
}
}
-static void dlci_setup(struct net_device *dev)
+
+static void pvc_setup(struct net_device *dev)
{
dev->type = ARPHRD_DLCI;
dev->flags = IFF_POINTOPOINT;
dev->addr_len = 2;
}
-static int fr_add_pvc(struct net_device *master, unsigned int dlci, int type)
+static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
{
- hdlc_device *hdlc = dev_to_hdlc(master);
+ hdlc_device *hdlc = dev_to_hdlc(frad);
pvc_device *pvc = NULL;
struct net_device *dev;
int result, used;
if (type == ARPHRD_ETHER)
prefix = "pvceth%d";
- if ((pvc = add_pvc(master, dlci)) == NULL) {
+ if ((pvc = add_pvc(frad, dlci)) == NULL) {
printk(KERN_WARNING "%s: Memory squeeze on fr_add_pvc()\n",
- master->name);
+ frad->name);
return -ENOBUFS;
}
"pvceth%d", ether_setup);
else
dev = alloc_netdev(sizeof(struct net_device_stats),
- "pvc%d", dlci_setup);
+ "pvc%d", pvc_setup);
if (!dev) {
printk(KERN_WARNING "%s: Memory squeeze on fr_pvc()\n",
- master->name);
+ frad->name);
delete_unused_pvcs(hdlc);
return -ENOBUFS;
}
dev->destructor = free_netdev;
*get_dev_p(pvc, type) = dev;
if (!used) {
- hdlc->state.fr.dce_changed = 1;
- hdlc->state.fr.dce_pvc_count++;
+ state(hdlc)->dce_changed = 1;
+ state(hdlc)->dce_pvc_count++;
}
return 0;
}
*get_dev_p(pvc, type) = NULL;
if (!pvc_is_used(pvc)) {
- hdlc->state.fr.dce_pvc_count--;
- hdlc->state.fr.dce_changed = 1;
+ state(hdlc)->dce_pvc_count--;
+ state(hdlc)->dce_changed = 1;
}
delete_unused_pvcs(hdlc);
return 0;
-static void fr_destroy(hdlc_device *hdlc)
+static void fr_destroy(struct net_device *frad)
{
- pvc_device *pvc;
-
- pvc = hdlc->state.fr.first_pvc;
- hdlc->state.fr.first_pvc = NULL; /* All PVCs destroyed */
- hdlc->state.fr.dce_pvc_count = 0;
- hdlc->state.fr.dce_changed = 1;
+ hdlc_device *hdlc = dev_to_hdlc(frad);
+ pvc_device *pvc = state(hdlc)->first_pvc;
+ state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
+ state(hdlc)->dce_pvc_count = 0;
+ state(hdlc)->dce_changed = 1;
while (pvc) {
pvc_device *next = pvc->next;
}
+static struct hdlc_proto proto = {
+ .close = fr_close,
+ .start = fr_start,
+ .stop = fr_stop,
+ .detach = fr_destroy,
+ .ioctl = fr_ioctl,
+ .module = THIS_MODULE,
+};
-int hdlc_fr_ioctl(struct net_device *dev, struct ifreq *ifr)
+
+static int fr_ioctl(struct net_device *dev, struct ifreq *ifr)
{
- fr_proto *fr_s = ifr->ifr_settings.ifs_ifsu.fr;
+ fr_proto __user *fr_s = ifr->ifr_settings.ifs_ifsu.fr;
const size_t size = sizeof(fr_proto);
fr_proto new_settings;
hdlc_device *hdlc = dev_to_hdlc(dev);
switch (ifr->ifr_settings.type) {
case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
+ return -EINVAL;
ifr->ifr_settings.type = IF_PROTO_FR;
if (ifr->ifr_settings.size < size) {
ifr->ifr_settings.size = size; /* data size wanted */
return -ENOBUFS;
}
- if (copy_to_user(fr_s, &hdlc->state.fr.settings, size))
+ if (copy_to_user(fr_s, &state(hdlc)->settings, size))
return -EFAULT;
return 0;
if ((new_settings.lmi != LMI_NONE &&
new_settings.lmi != LMI_ANSI &&
- new_settings.lmi != LMI_CCITT) ||
+ new_settings.lmi != LMI_CCITT &&
+ new_settings.lmi != LMI_CISCO) ||
new_settings.t391 < 1 ||
new_settings.t392 < 2 ||
new_settings.n391 < 1 ||
if (result)
return result;
- if (hdlc->proto.id != IF_PROTO_FR) {
- hdlc_proto_detach(hdlc);
- hdlc->state.fr.first_pvc = NULL;
- hdlc->state.fr.dce_pvc_count = 0;
+ if (dev_to_hdlc(dev)->proto != &proto) { /* Different proto */
+ result = attach_hdlc_protocol(dev, &proto, fr_rx,
+ sizeof(struct frad_state));
+ if (result)
+ return result;
+ state(hdlc)->first_pvc = NULL;
+ state(hdlc)->dce_pvc_count = 0;
}
- memcpy(&hdlc->state.fr.settings, &new_settings, size);
- memset(&hdlc->proto, 0, sizeof(hdlc->proto));
-
- hdlc->proto.close = fr_close;
- hdlc->proto.start = fr_start;
- hdlc->proto.stop = fr_stop;
- hdlc->proto.detach = fr_destroy;
- hdlc->proto.netif_rx = fr_rx;
- hdlc->proto.id = IF_PROTO_FR;
+ memcpy(&state(hdlc)->settings, &new_settings, size);
+
dev->hard_start_xmit = hdlc->xmit;
dev->hard_header = NULL;
dev->type = ARPHRD_FRAD;
case IF_PROTO_FR_DEL_PVC:
case IF_PROTO_FR_ADD_ETH_PVC:
case IF_PROTO_FR_DEL_ETH_PVC:
+ if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
+ return -EINVAL;
+
if(!capable(CAP_NET_ADMIN))
return -EPERM;
return -EINVAL;
}
+
+
+static int __init mod_init(void)
+{
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+
+static void __exit mod_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+
+module_init(mod_init);
+module_exit(mod_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Frame-Relay protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");