[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
Jeff Garzik
parent
88d7bd8cb9
commit
b3dd65f958
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@ -1,21 +1,21 @@
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Generic HDLC layer
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Krzysztof Halasa <khc@pm.waw.pl>
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January, 2003
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Generic HDLC layer currently supports:
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- Frame Relay (ANSI, CCITT and no LMI), with ARP support (no InARP).
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Normal (routed) and Ethernet-bridged (Ethernet device emulation)
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interfaces can share a single PVC.
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- raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
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- Cisco HDLC,
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- PPP (uses syncppp.c),
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- X.25 (uses X.25 routines).
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1. Frame Relay (ANSI, CCITT, Cisco and no LMI).
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- Normal (routed) and Ethernet-bridged (Ethernet device emulation)
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interfaces can share a single PVC.
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- ARP support (no InARP support in the kernel - there is an
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experimental InARP user-space daemon available on:
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http://www.kernel.org/pub/linux/utils/net/hdlc/).
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2. raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
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3. Cisco HDLC.
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4. PPP (uses syncppp.c).
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5. X.25 (uses X.25 routines).
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There are hardware drivers for the following cards:
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- C101 by Moxa Technologies Co., Ltd.
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- RISCom/N2 by SDL Communications Inc.
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- and others, some not in the official kernel.
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Generic HDLC is a protocol driver only - it needs a low-level driver
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for your particular hardware.
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Ethernet device emulation (using HDLC or Frame-Relay PVC) is compatible
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with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
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@ -24,7 +24,7 @@ with IEEE 802.1Q (VLANs) and 802.1D (Ethernet bridging).
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Make sure the hdlc.o and the hardware driver are loaded. It should
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create a number of "hdlc" (hdlc0 etc) network devices, one for each
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WAN port. You'll need the "sethdlc" utility, get it from:
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http://hq.pm.waw.pl/hdlc/
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http://www.kernel.org/pub/linux/utils/net/hdlc/
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Compile sethdlc.c utility:
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gcc -O2 -Wall -o sethdlc sethdlc.c
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@ -52,12 +52,12 @@ Setting interface:
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* v35 | rs232 | x21 | t1 | e1 - sets physical interface for a given port
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if the card has software-selectable interfaces
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loopback - activate hardware loopback (for testing only)
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* clock ext - external clock (uses DTE RX and TX clock)
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* clock int - internal clock (provides clock signal on DCE clock output)
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* clock txint - TX internal, RX external (provides TX clock on DCE output)
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* clock txfromrx - TX clock derived from RX clock (TX clock on DCE output)
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* rate - sets clock rate in bps (not required for external clock or
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for txfromrx)
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* clock ext - both RX clock and TX clock external
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* clock int - both RX clock and TX clock internal
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* clock txint - RX clock external, TX clock internal
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* clock txfromrx - RX clock external, TX clock derived from RX clock
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* rate - sets clock rate in bps (for "int" or "txint" clock only)
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Setting protocol:
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@ -79,7 +79,7 @@ Setting protocol:
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* x25 - sets X.25 mode
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* fr - Frame Relay mode
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lmi ansi / ccitt / none - LMI (link management) type
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lmi ansi / ccitt / cisco / none - LMI (link management) type
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dce - Frame Relay DCE (network) side LMI instead of default DTE (user).
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It has nothing to do with clocks!
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t391 - link integrity verification polling timer (in seconds) - user
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@ -119,13 +119,14 @@ or
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If you have a problem with N2 or C101 card, you can issue the "private"
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command to see port's packet descriptor rings (in kernel logs):
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If you have a problem with N2, C101 or PLX200SYN card, you can issue the
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"private" command to see port's packet descriptor rings (in kernel logs):
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sethdlc hdlc0 private
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The hardware driver has to be build with CONFIG_HDLC_DEBUG_RINGS.
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The hardware driver has to be build with #define DEBUG_RINGS.
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Attaching this info to bug reports would be helpful. Anyway, let me know
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if you have problems using this.
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For patches and other info look at http://hq.pm.waw.pl/hdlc/
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For patches and other info look at:
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<http://www.kernel.org/pub/linux/utils/net/hdlc/>.
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@ -2,7 +2,7 @@
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* Generic HDLC support routines for Linux
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* Frame Relay support
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*
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* Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
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* Copyright (C) 1999 - 2005 Krzysztof Halasa <khc@pm.waw.pl>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License
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@ -27,6 +27,10 @@
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active = open and "link reliable"
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exist = new = not used
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CCITT LMI: ITU-T Q.933 Annex A
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ANSI LMI: ANSI T1.617 Annex D
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CISCO LMI: the original, aka "Gang of Four" LMI
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*/
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#include <linux/module.h>
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@ -49,45 +53,41 @@
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#undef DEBUG_ECN
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#undef DEBUG_LINK
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#define MAXLEN_LMISTAT 20 /* max size of status enquiry frame */
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#define FR_UI 0x03
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#define FR_PAD 0x00
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#define PVC_STATE_NEW 0x01
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#define PVC_STATE_ACTIVE 0x02
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#define PVC_STATE_FECN 0x08 /* FECN condition */
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#define PVC_STATE_BECN 0x10 /* BECN condition */
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#define NLPID_IP 0xCC
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#define NLPID_IPV6 0x8E
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#define NLPID_SNAP 0x80
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#define NLPID_PAD 0x00
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#define NLPID_CCITT_ANSI_LMI 0x08
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#define NLPID_CISCO_LMI 0x09
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#define FR_UI 0x03
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#define FR_PAD 0x00
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#define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */
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#define LMI_CISCO_DLCI 1023
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#define NLPID_IP 0xCC
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#define NLPID_IPV6 0x8E
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#define NLPID_SNAP 0x80
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#define NLPID_PAD 0x00
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#define NLPID_Q933 0x08
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#define LMI_CALLREF 0x00 /* Call Reference */
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#define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI locking shift */
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#define LMI_ANSI_CISCO_REPTYPE 0x01 /* report type */
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#define LMI_CCITT_REPTYPE 0x51
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#define LMI_ANSI_CISCO_ALIVE 0x03 /* keep alive */
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#define LMI_CCITT_ALIVE 0x53
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#define LMI_ANSI_CISCO_PVCSTAT 0x07 /* PVC status */
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#define LMI_CCITT_PVCSTAT 0x57
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#define LMI_FULLREP 0x00 /* full report */
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#define LMI_INTEGRITY 0x01 /* link integrity report */
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#define LMI_SINGLE 0x02 /* single PVC report */
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#define LMI_DLCI 0 /* LMI DLCI */
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#define LMI_PROTO 0x08
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#define LMI_CALLREF 0x00 /* Call Reference */
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#define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI lockshift */
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#define LMI_REPTYPE 1 /* report type */
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#define LMI_CCITT_REPTYPE 0x51
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#define LMI_ALIVE 3 /* keep alive */
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#define LMI_CCITT_ALIVE 0x53
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#define LMI_PVCSTAT 7 /* pvc status */
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#define LMI_CCITT_PVCSTAT 0x57
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#define LMI_FULLREP 0 /* full report */
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#define LMI_INTEGRITY 1 /* link integrity report */
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#define LMI_SINGLE 2 /* single pvc report */
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#define LMI_STATUS_ENQUIRY 0x75
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#define LMI_STATUS 0x7D /* reply */
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#define LMI_REPT_LEN 1 /* report type element length */
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#define LMI_INTEG_LEN 2 /* link integrity element length */
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#define LMI_LENGTH 13 /* standard LMI frame length */
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#define LMI_ANSI_LENGTH 14
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#define LMI_CCITT_CISCO_LENGTH 13 /* LMI frame lengths */
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#define LMI_ANSI_LENGTH 14
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typedef struct {
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@ -223,35 +223,24 @@ static inline struct net_device** get_dev_p(pvc_device *pvc, int type)
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}
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static inline u16 status_to_dlci(u8 *status, int *active, int *new)
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{
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*new = (status[2] & 0x08) ? 1 : 0;
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*active = (status[2] & 0x02) ? 1 : 0;
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return ((status[0] & 0x3F) << 4) | ((status[1] & 0x78) >> 3);
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}
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static inline void dlci_to_status(u16 dlci, u8 *status, int active, int new)
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{
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status[0] = (dlci >> 4) & 0x3F;
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status[1] = ((dlci << 3) & 0x78) | 0x80;
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status[2] = 0x80;
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if (new)
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status[2] |= 0x08;
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else if (active)
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status[2] |= 0x02;
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}
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static int fr_hard_header(struct sk_buff **skb_p, u16 dlci)
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{
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u16 head_len;
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struct sk_buff *skb = *skb_p;
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switch (skb->protocol) {
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case __constant_ntohs(NLPID_CCITT_ANSI_LMI):
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head_len = 4;
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skb_push(skb, head_len);
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skb->data[3] = NLPID_CCITT_ANSI_LMI;
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break;
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case __constant_ntohs(NLPID_CISCO_LMI):
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head_len = 4;
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skb_push(skb, head_len);
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skb->data[3] = NLPID_CISCO_LMI;
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break;
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case __constant_ntohs(ETH_P_IP):
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head_len = 4;
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skb_push(skb, head_len);
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@ -264,12 +253,6 @@ static int fr_hard_header(struct sk_buff **skb_p, u16 dlci)
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skb->data[3] = NLPID_IPV6;
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break;
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case __constant_ntohs(LMI_PROTO):
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head_len = 4;
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skb_push(skb, head_len);
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skb->data[3] = LMI_PROTO;
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break;
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case __constant_ntohs(ETH_P_802_3):
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head_len = 10;
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if (skb_headroom(skb) < head_len) {
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@ -461,13 +444,14 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
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hdlc_device *hdlc = dev_to_hdlc(dev);
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struct sk_buff *skb;
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pvc_device *pvc = hdlc->state.fr.first_pvc;
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int len = (hdlc->state.fr.settings.lmi == LMI_ANSI) ? LMI_ANSI_LENGTH
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: LMI_LENGTH;
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int stat_len = 3;
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int lmi = hdlc->state.fr.settings.lmi;
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int dce = hdlc->state.fr.settings.dce;
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int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH;
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int stat_len = (lmi == LMI_CISCO) ? 6 : 3;
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u8 *data;
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int i = 0;
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if (hdlc->state.fr.settings.dce && fullrep) {
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if (dce && fullrep) {
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len += hdlc->state.fr.dce_pvc_count * (2 + stat_len);
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if (len > HDLC_MAX_MRU) {
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printk(KERN_WARNING "%s: Too many PVCs while sending "
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@ -484,29 +468,31 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
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}
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memset(skb->data, 0, len);
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skb_reserve(skb, 4);
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skb->protocol = __constant_htons(LMI_PROTO);
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fr_hard_header(&skb, LMI_DLCI);
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if (lmi == LMI_CISCO) {
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skb->protocol = __constant_htons(NLPID_CISCO_LMI);
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fr_hard_header(&skb, LMI_CISCO_DLCI);
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} else {
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skb->protocol = __constant_htons(NLPID_CCITT_ANSI_LMI);
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fr_hard_header(&skb, LMI_CCITT_ANSI_DLCI);
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}
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data = skb->tail;
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data[i++] = LMI_CALLREF;
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data[i++] = hdlc->state.fr.settings.dce
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? LMI_STATUS : LMI_STATUS_ENQUIRY;
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if (hdlc->state.fr.settings.lmi == LMI_ANSI)
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data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY;
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if (lmi == LMI_ANSI)
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data[i++] = LMI_ANSI_LOCKSHIFT;
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data[i++] = (hdlc->state.fr.settings.lmi == LMI_CCITT)
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? LMI_CCITT_REPTYPE : LMI_REPTYPE;
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data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
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LMI_ANSI_CISCO_REPTYPE;
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data[i++] = LMI_REPT_LEN;
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data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY;
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data[i++] = (hdlc->state.fr.settings.lmi == LMI_CCITT)
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? LMI_CCITT_ALIVE : LMI_ALIVE;
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data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE;
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data[i++] = LMI_INTEG_LEN;
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data[i++] = hdlc->state.fr.txseq =fr_lmi_nextseq(hdlc->state.fr.txseq);
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data[i++] = hdlc->state.fr.rxseq;
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if (hdlc->state.fr.settings.dce && fullrep) {
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if (dce && fullrep) {
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while (pvc) {
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data[i++] = (hdlc->state.fr.settings.lmi == LMI_CCITT)
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? LMI_CCITT_PVCSTAT : LMI_PVCSTAT;
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data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
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LMI_ANSI_CISCO_PVCSTAT;
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data[i++] = stat_len;
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/* LMI start/restart */
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@ -523,8 +509,20 @@ static void fr_lmi_send(struct net_device *dev, int fullrep)
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fr_log_dlci_active(pvc);
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}
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dlci_to_status(pvc->dlci, data + i,
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pvc->state.active, pvc->state.new);
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if (lmi == LMI_CISCO) {
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data[i] = pvc->dlci >> 8;
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data[i + 1] = pvc->dlci & 0xFF;
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} else {
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data[i] = (pvc->dlci >> 4) & 0x3F;
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data[i + 1] = ((pvc->dlci << 3) & 0x78) | 0x80;
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data[i + 2] = 0x80;
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}
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if (pvc->state.new)
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data[i + 2] |= 0x08;
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else if (pvc->state.active)
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data[i + 2] |= 0x02;
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i += stat_len;
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pvc = pvc->next;
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}
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@ -569,6 +567,8 @@ static void fr_set_link_state(int reliable, struct net_device *dev)
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pvc_carrier(0, pvc);
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pvc->state.exist = pvc->state.active = 0;
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pvc->state.new = 0;
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if (!hdlc->state.fr.settings.dce)
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pvc->state.bandwidth = 0;
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pvc = pvc->next;
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}
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}
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@ -583,11 +583,12 @@ static void fr_timer(unsigned long arg)
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int i, cnt = 0, reliable;
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u32 list;
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if (hdlc->state.fr.settings.dce)
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if (hdlc->state.fr.settings.dce) {
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reliable = hdlc->state.fr.request &&
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time_before(jiffies, hdlc->state.fr.last_poll +
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hdlc->state.fr.settings.t392 * HZ);
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else {
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hdlc->state.fr.request = 0;
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} else {
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hdlc->state.fr.last_errors <<= 1; /* Shift the list */
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if (hdlc->state.fr.request) {
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if (hdlc->state.fr.reliable)
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@ -634,65 +635,88 @@ static void fr_timer(unsigned long arg)
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static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
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{
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hdlc_device *hdlc = dev_to_hdlc(dev);
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int stat_len;
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pvc_device *pvc;
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int reptype = -1, error, no_ram;
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u8 rxseq, txseq;
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int i;
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int lmi = hdlc->state.fr.settings.lmi;
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int dce = hdlc->state.fr.settings.dce;
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int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i;
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if (skb->len < ((hdlc->state.fr.settings.lmi == LMI_ANSI)
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? LMI_ANSI_LENGTH : LMI_LENGTH)) {
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if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH :
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LMI_CCITT_CISCO_LENGTH)) {
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printk(KERN_INFO "%s: Short LMI frame\n", dev->name);
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return 1;
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}
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if (skb->data[5] != (!hdlc->state.fr.settings.dce ?
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LMI_STATUS : LMI_STATUS_ENQUIRY)) {
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printk(KERN_INFO "%s: LMI msgtype=%x, Not LMI status %s\n",
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dev->name, skb->data[2],
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hdlc->state.fr.settings.dce ? "enquiry" : "reply");
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if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI :
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NLPID_CCITT_ANSI_LMI)) {
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printk(KERN_INFO "%s: Received non-LMI frame with LMI"
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" DLCI\n", dev->name);
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return 1;
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}
|
||||
|
||||
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 ||
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
|
||||
|
|
|
|||
|
|
@ -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;
|
||||
|
||||
|
|
|
|||
Reference in New Issue