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[PATCH] Generic HDLC update 

The attached patch updates generic HDLC to version 1.18.
FR Cisco LMI production-tested. Please apply to Linux 2.6. Thanks.

Changes:
- doc updates
- added Cisco LMI support to Frame-Relay code
- cleaned hdlc_fr.c a bit, removed some orphaned #defines etc.
- fixed a problem with non-functional LMI in FR DCE mode.
- changed diagnostic messages to better conform to FR standards
- all protocols: information about carrier changes (DCD line) is now
  printed to kernel logs.

Signed-Off-By: Krzysztof Halasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Halasa 2005-04-21 15:57:25 +02:00 коммит произвёл Jeff Garzik
Родитель 88d7bd8cb9
Коммит b3dd65f958
4 изменённых файлов: 211 добавлений и 170 удалений
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49
Documentation/networking/generic-hdlc.txt
Просмотреть файл

@ -1,21 +1,21 @@
Generic HDLC layer
Krzysztof Halasa <khc@pm.waw.pl>
January, 2003
Generic HDLC layer currently supports:
- Frame Relay (ANSI, CCITT and no LMI), with ARP support (no InARP).
Normal (routed) and Ethernet-bridged (Ethernet device emulation)
interfaces can share a single PVC.
- raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
- Cisco HDLC,
- PPP (uses syncppp.c),
- X.25 (uses X.25 routines).
1. Frame Relay (ANSI, CCITT, Cisco and no LMI).
- Normal (routed) and Ethernet-bridged (Ethernet device emulation)
interfaces can share a single PVC.
- ARP support (no InARP support in the kernel - there is an
experimental InARP user-space daemon available on:
http://www.kernel.org/pub/linux/utils/net/hdlc/).
2. raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
3. Cisco HDLC.
4. PPP (uses syncppp.c).
5. X.25 (uses X.25 routines).
There are hardware drivers for the following cards:
- C101 by Moxa Technologies Co., Ltd.
- RISCom/N2 by SDL Communications Inc.
- and others, some not in the official kernel.
Generic HDLC is a protocol driver only - it needs a low-level driver
for your particular hardware.
Ethernet device emulation (using HDLC or Frame-Relay PVC) is compatible
with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
@ -24,7 +24,7 @@ with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
Make sure the hdlc.o and the hardware driver are loaded. It should
create a number of "hdlc" (hdlc0 etc) network devices, one for each
WAN port. You'll need the "sethdlc" utility, get it from:
http://hq.pm.waw.pl/hdlc/
http://www.kernel.org/pub/linux/utils/net/hdlc/
Compile sethdlc.c utility:
gcc -O2 -Wall -o sethdlc sethdlc.c
@ -52,12 +52,12 @@ Setting interface:
* v35 | rs232 | x21 | t1 | e1 - sets physical interface for a given port
if the card has software-selectable interfaces
loopback - activate hardware loopback (for testing only)
* clock ext - external clock (uses DTE RX and TX clock)
* clock int - internal clock (provides clock signal on DCE clock output)
* clock txint - TX internal, RX external (provides TX clock on DCE output)
* clock txfromrx - TX clock derived from RX clock (TX clock on DCE output)
* rate - sets clock rate in bps (not required for external clock or
for txfromrx)
* clock ext - both RX clock and TX clock external
* clock int - both RX clock and TX clock internal
* clock txint - RX clock external, TX clock internal
* clock txfromrx - RX clock external, TX clock derived from RX clock
* rate - sets clock rate in bps (for "int" or "txint" clock only)
Setting protocol:
@ -79,7 +79,7 @@ Setting protocol:
* x25 - sets X.25 mode
* fr - Frame Relay mode
lmi ansi / ccitt / none - LMI (link management) type
lmi ansi / ccitt / cisco / none - LMI (link management) type
dce - Frame Relay DCE (network) side LMI instead of default DTE (user).
It has nothing to do with clocks!
t391 - link integrity verification polling timer (in seconds) - user
@ -119,13 +119,14 @@ or
If you have a problem with N2 or C101 card, you can issue the "private"
command to see port's packet descriptor rings (in kernel logs):
If you have a problem with N2, C101 or PLX200SYN card, you can issue the
"private" command to see port's packet descriptor rings (in kernel logs):
sethdlc hdlc0 private
The hardware driver has to be build with CONFIG_HDLC_DEBUG_RINGS.
The hardware driver has to be build with #define DEBUG_RINGS.
Attaching this info to bug reports would be helpful. Anyway, let me know
if you have problems using this.
For patches and other info look at http://hq.pm.waw.pl/hdlc/
For patches and other info look at:
<http://www.kernel.org/pub/linux/utils/net/hdlc/>.

312
drivers/net/wan/hdlc_fr.c
Просмотреть файл

@ -2,7 +2,7 @@
* Generic HDLC support routines for Linux
* Frame Relay support
*
* Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
* Copyright (C) 1999 - 2005 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
@ -27,6 +27,10 @@
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>
@ -49,45 +53,41 @@
#undef DEBUG_ECN
#undef DEBUG_LINK
#define MAXLEN_LMISTAT 20 /* max size of status enquiry frame */
#define FR_UI 0x03
#define FR_PAD 0x00
#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 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 FR_UI 0x03
#define FR_PAD 0x00
#define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */
#define LMI_CISCO_DLCI 1023
#define NLPID_IP 0xCC
#define NLPID_IPV6 0x8E
#define NLPID_SNAP 0x80
#define NLPID_PAD 0x00
#define NLPID_Q933 0x08
#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 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 {
@ -223,35 +223,24 @@ static inline struct net_device** get_dev_p(pvc_device *pvc, int type)
}
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(NLPID_CCITT_ANSI_LMI):
head_len = 4;
skb_push(skb, head_len);
skb->data[3] = NLPID_CCITT_ANSI_LMI;
break;
case __constant_ntohs(NLPID_CISCO_LMI):
head_len = 4;
skb_push(skb, head_len);
skb->data[3] = NLPID_CISCO_LMI;
break;
case __constant_ntohs(ETH_P_IP):
head_len = 4;
skb_push(skb, head_len);
@ -264,12 +253,6 @@ static int fr_hard_header(struct sk_buff **skb_p, u16 dlci)
skb->data[3] = NLPID_IPV6;
break;
case __constant_ntohs(LMI_PROTO):
head_len = 4;
skb_push(skb, head_len);
skb->data[3] = LMI_PROTO;
break;
case __constant_ntohs(ETH_P_802_3):
head_len = 10;
if (skb_headroom(skb) < head_len) {
@ -461,13 +444,14 @@ 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;
int lmi = hdlc->state.fr.settings.lmi;
int dce = hdlc->state.fr.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) {
if (dce && fullrep) {
len += hdlc->state.fr.dce_pvc_count * (2 + stat_len);
if (len > HDLC_MAX_MRU) {
printk(KERN_WARNING "%s: Too many PVCs while sending "
@ -484,29 +468,31 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
}
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;
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 */
@ -523,8 +509,20 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
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;
}
@ -569,6 +567,8 @@ static void fr_set_link_state(int reliable, struct net_device *dev)
pvc_carrier(0, pvc);
pvc->state.exist = pvc->state.active = 0;
pvc->state.new = 0;
if (!hdlc->state.fr.settings.dce)
pvc->state.bandwidth = 0;
pvc = pvc->next;
}
}
@ -583,11 +583,12 @@ static void fr_timer(unsigned long arg)
int i, cnt = 0, reliable;
u32 list;
if (hdlc->state.fr.settings.dce)
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.request = 0;
} else {
hdlc->state.fr.last_errors <<= 1; /* Shift the list */
if (hdlc->state.fr.request) {
if (hdlc->state.fr.reliable)
@ -634,65 +635,88 @@ static void fr_timer(unsigned long arg)
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 = hdlc->state.fr.settings.lmi;
int dce = hdlc->state.fr.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;
}
i = (hdlc->state.fr.settings.lmi == LMI_ANSI) ? 7 : 6;
if (skb->data[4] != LMI_CALLREF) {
printk(KERN_INFO "%s: Invalid LMI Call reference (0x%02X)\n",
dev->name, skb->data[4]);
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 (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 (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;
}
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++;
i++; /* Skip length field */
hdlc->state.fr.rxseq = skb->data[i++]; /* TX sequence from peer */
rxseq = skb->data[i++]; /* Should confirm our sequence */
txseq = hdlc->state.fr.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;
}
if (dce)
hdlc->state.fr.last_poll = jiffies;
}
error = 0;
if (!hdlc->state.fr.reliable)
@ -703,7 +727,7 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
error = 1;
}
if (hdlc->state.fr.settings.dce) {
if (dce) {
if (hdlc->state.fr.fullrep_sent && !error) {
/* Stop sending full report - the last one has been confirmed by DTE */
hdlc->state.fr.fullrep_sent = 0;
@ -725,6 +749,7 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
hdlc->state.fr.dce_changed = 0;
}
hdlc->state.fr.request = 1; /* got request */
fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0);
return 0;
}
@ -739,7 +764,6 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
if (reptype != LMI_FULLREP)
return 0;
stat_len = 3;
pvc = hdlc->state.fr.first_pvc;
while (pvc) {
@ -750,24 +774,35 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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;
}
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++;
if (skb->data[i] != stat_len) {
printk(KERN_WARNING "%s: Invalid PVCSTAT length: %x\n",
dev->name, skb->data[i]);
return 1;
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;
}
i++;
dlci = status_to_dlci(skb->data + i, &active, &new);
pvc = add_pvc(dev, dlci);
@ -783,9 +818,11 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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);
}
@ -801,6 +838,7 @@ static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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;
@ -829,22 +867,15 @@ static int fr_rx(struct sk_buff *skb)
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 &&
(hdlc->state.fr.settings.lmi == LMI_ANSI ||
hdlc->state.fr.settings.lmi == LMI_CCITT)) ||
(dlci == LMI_CISCO_DLCI &&
hdlc->state.fr.settings.lmi == LMI_CISCO)) {
if (fr_lmi_recv(ndev, skb))
goto rx_error;
dev_kfree_skb_any(skb);
return NET_RX_SUCCESS;
}
pvc = find_pvc(hdlc, dlci);
@ -1170,7 +1201,8 @@ int hdlc_fr_ioctl(struct net_device *dev, struct ifreq *ifr)
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 ||

16
drivers/net/wan/hdlc_generic.c
Просмотреть файл

@ -1,7 +1,7 @@
/*
* Generic HDLC support routines for Linux
*
* Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
* Copyright (C) 1999 - 2005 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
@ -38,7 +38,7 @@
#include <linux/hdlc.h>
static const char* version = "HDLC support module revision 1.17";
static const char* version = "HDLC support module revision 1.18";
#undef DEBUG_LINK
@ -126,10 +126,13 @@ void hdlc_set_carrier(int on, struct net_device *dev)
if (!hdlc->open)
goto carrier_exit;
if (hdlc->carrier)
if (hdlc->carrier) {
printk(KERN_INFO "%s: Carrier detected\n", dev->name);
__hdlc_set_carrier_on(dev);
else
} else {
printk(KERN_INFO "%s: Carrier lost\n", dev->name);
__hdlc_set_carrier_off(dev);
}
carrier_exit:
spin_unlock_irqrestore(&hdlc->state_lock, flags);
@ -157,8 +160,11 @@ int hdlc_open(struct net_device *dev)
spin_lock_irq(&hdlc->state_lock);
if (hdlc->carrier)
if (hdlc->carrier) {
printk(KERN_INFO "%s: Carrier detected\n", dev->name);
__hdlc_set_carrier_on(dev);
} else
printk(KERN_INFO "%s: No carrier\n", dev->name);
hdlc->open = 1;

4
include/linux/hdlc.h
Просмотреть файл

@ -1,7 +1,7 @@
/*
* Generic HDLC support routines for Linux
*
* Copyright (C) 1999-2003 Krzysztof Halasa <khc@pm.waw.pl>
* Copyright (C) 1999-2005 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
@ -41,6 +41,7 @@
#define LMI_NONE 1 /* No LMI, all PVCs are static */
#define LMI_ANSI 2 /* ANSI Annex D */
#define LMI_CCITT 3 /* ITU-T Annex A */
#define LMI_CISCO 4 /* The "original" LMI, aka Gang of Four */
#define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */
#define HDLC_MAX_MRU (HDLC_MAX_MTU + 10 + 14 + 4) /* for ETH+VLAN over FR */
@ -89,6 +90,7 @@ typedef struct pvc_device_struct {
unsigned int deleted: 1;
unsigned int fecn: 1;
unsigned int becn: 1;
unsigned int bandwidth; /* Cisco LMI reporting only */
}state;
}pvc_device;