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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [isdn/] [isdn_net.c] - Rev 199
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/* $Id: isdn_net.c,v 1.1.1.1 2001-09-10 07:44:18 simons Exp $ * Linux ISDN subsystem, network interfaces and related functions (linklevel). * * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de) * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Log: not supported by cvs2svn $ * Revision 1.1.1.1 2001/07/02 17:58:31 simons * Initial revision * * Revision 1.48.2.28 1998/11/27 15:38:12 paul * Also huptimeout with dialmode == manual * * Revision 1.48.2.27 1998/11/05 22:11:53 fritz * Changed mail-address. * * Revision 1.48.2.26 1998/11/03 14:54:39 fritz * Applied callback-patch fur bundled RAW-IP by gvz@popocate.hamburg.pop.de * * Revision 1.48.2.25 1998/11/03 14:31:05 fritz * Reduced stack usage in various functions. * Adapted statemachine to work with certified HiSax. * Some fixes in callback handling. * * Revision 1.48.2.24 1998/10/25 22:08:22 fritz * Bugfix: Only first number was dialed. * * Revision 1.48.2.23 1998/10/25 17:42:18 fritz * Bugfix: added missing reset of connect-flag. * * Revision 1.48.2.22 1998/10/25 15:48:13 fritz * Misc bugfixes and adaptions to new HiSax * * Revision 1.48.2.21 1998/10/23 10:14:02 paul * Implementation of "dialmode" (successor of "status") * You also need current isdnctrl for this! * * Revision 1.48.2.20 1998/08/03 15:52:00 paul * various changes from 2.0.3[45] kernel sources, as suggested by * Oliver.Lauer@coburg.baynet.de * * Revision 1.48.2.19 1998/07/30 11:29:32 paul * printk message only appeared when status is off and interface is rawIP, * which is confusing for people who don't know about "isdnctrl status <if> on". * * Revision 1.48.2.18 1998/06/29 17:08:20 cal * applied small TimRu-patch by Oliver Lauer * * Revision 1.48.2.17 1998/06/26 22:00:47 keil * tx_queue_len = 5 was too small * * Revision 1.48.2.16 1998/06/09 12:24:40 cal * Changed default of local netdev flags: ISDN_NET_STOPPED is default now, * so autodial is suppressed for that device until it is switched on using * 'isdnctrl status dev-name on'. * * Revision 1.48.2.15 1998/06/07 13:47:51 fritz * ABC cleanup * * Revision 1.48.2.13 1998/05/22 10:13:07 detabc * in case of a icmp-unreach condition the tcp-keepalive-entrys * will be dropped from the internal double-link-list (only abc-extension). * send icmp unreach only if the skb->protocol == ETH_P_IP * * Revision 1.48.2.12 1998/05/21 09:23:56 detabc * speedup abc-no-dchannel-redial * * Revision 1.48.2.11 1998/05/07 19:54:53 detabc * bugfix in abc_delayed_hangup * optimize keepalive-tests for abc_rawip * * Revision 1.48.2.10 1998/05/06 08:34:04 detabc * change ICMP_HOST_UNREACH to ICMP_NET_UNREACH (only abc-ext.) * set dev->tbusy to zero in isdn_net_unreachable() (only abc-ext.) * drop all new packets and send ICMP_NET_UNREACH for * min. dialwait to max. dialwait * 6 time. (only abc-ext.) * change random-deliver of packets (small first) from all emcapsulation * to only rawip with ABC-Router-Flag enabled. * * Revision 1.48.2.9 1998/05/03 17:48:22 detabc * remove unused dev->tbusy = 1 line (only abc-extension) * * Revision 1.48.2.8 1998/04/28 15:11:55 detabc * fixed the wrong #ifndef CONFIG_ISDN_WITH_ABC define * * Revision 1.48.2.7 1998/04/26 11:24:08 detabc * add abc_delayed_hangup (only with a spezial udp-packet) * move abc-compress and -crypt from start of transmit to the * isdn_net_send_skb() function (better for TIMRU and the work is much easyer). * * added the abc_tx_queue's in the isdn_net_send_skb(). * give small-packets a high priority. * transmit small packest first. * NOTE: NOTE: NOTE: * At now with the ABC-EXTENSION will be deliver the pakets in RANDOM-ORDER. * Please let me know if this a problem. * * Revision 1.48.2.6 1998/04/18 17:55:09 detabc * dropp packets if call's are disabled (only abc-extension) * add secure callback (only abc-extension) * this means: if you are the callback-out-side and the remote * dont reject the call ????? * in this case the connection is ok !!! but you pay the connection !!!! * now this will be a configerror and the connection will be dropped . * also a new call will be disabled for 4 hours. * incouming-calls are still possible. * * Revision 1.48.2.5 1998/04/16 19:24:51 keil * Fix from vger (tx max qlength) * * Revision 1.48.2.4 1998/03/20 12:17:27 detabc * merge abc-extension with timru-time-rules * christian please check my changes in the CONFIG_ISDN_TIMEOUT_RULES sources * please ! think about: * behind the function isdn_abc_net_start_xmit(), is the first one behind * the kernel-driver, the paket will be compressed an/or crypted. In this * case no information availible in the skb->data area. * * Fritz !! Please read my remarks in the funktion isdn_net_unreachable() ! * * Revision 1.48.2.3 1998/03/16 09:55:51 cal * Merged in TimRu-patches. Still needs validation in conjunction with ABC-patches. * * Revision 1.48.2.2 1998/03/07 23:35:09 detabc * added the abc-extension to the linux isdn-kernel * for kernel-version 2.0.xx * DO NOT USE FOR HIGHER KERNELS-VERSIONS * all source-lines are switched with the define CONFIG_ISDN_WITH_ABC * (make config and answer ABC-Ext. Support (Compress,TCP-Keepalive ...) with yes * * you need also a modified isdnctrl-source the switch on the * features of the abc-extension * * please use carefully. more detail will be follow. * thanks * * Revision 1.48.2.1 1997/08/21 15:56:07 fritz * Synchronized 2.0.X branch with 2.0.31-pre7 * * Revision 1.48 1997/06/22 11:57:15 fritz * Added ability to adjust slave triggerlevel. * * Revision 1.47 1997/06/21 10:52:05 fritz * Removed wrong SET_SKB_FREE in isdn_net_send_skb() * * Revision 1.46 1997/06/17 13:05:24 hipp * Applied Eric's underflow-patches (slightly modified) * * Revision 1.45 1997/06/10 16:24:22 hipp * hard_header changes for syncPPP (now behaves like RAWIP) * * Revision 1.44 1997/05/27 15:17:26 fritz * Added changes for recent 2.1.x kernels: * changed return type of isdn_close * queue_task_* -> queue_task * clear/set_bit -> test_and_... where apropriate. * changed type of hard_header_cache parameter. * * Revision 1.43 1997/03/30 16:51:13 calle * changed calls to copy_from_user/copy_to_user and removed verify_area * were possible. * * Revision 1.42 1997/03/11 08:43:51 fritz * Perform a hangup if number is deleted while dialing. * * Revision 1.41 1997/03/08 08:16:31 fritz * Bugfix: Deleting a phone number during dial gave unpredictable results. * * Revision 1.40 1997/03/05 21:16:08 fritz * Fix: did not compile with 2.1.27 * * Revision 1.39 1997/03/04 21:36:52 fritz * Added sending ICMP messages when no connetion is possible. * * Revision 1.38 1997/02/23 23:41:14 fritz * Bugfix: Slave interfaces have to be hung up before master. * * Revision 1.37 1997/02/11 18:32:51 fritz * Bugfix in isdn_ppp_free_mpqueue(). * * Revision 1.36 1997/02/10 21:31:11 fritz * Changed setup-interface (incoming and outgoing). * * Revision 1.35 1997/02/10 20:12:45 fritz * Changed interface for reporting incoming calls. * * Revision 1.34 1997/02/03 23:15:07 fritz * Reformatted according CodingStyle. * replaced arp_find prototype by proper include. * made dev_purge_queues static. * Bugfix in bogocps calculation. * removed isdn_net_receive_callback - was never used ;-) * Misc. fixes for Kernel 2.1.X comaptibility. * * Revision 1.33 1997/01/17 01:19:25 fritz * Applied chargeint patch. * * Revision 1.32 1997/01/14 01:29:31 fritz * Bugfix: isdn_net_hangup() did not reset ISDN_NET_CONNECTED. * * Revision 1.31 1997/01/11 23:30:42 fritz * Speed up dial statemachine. * * Revision 1.30 1996/11/25 17:20:50 hipp * fixed pppbind bug in isdn_net_find_icall() * * Revision 1.29 1996/11/13 02:31:38 fritz * Minor cleanup. * * Revision 1.28 1996/10/27 20:49:06 keil * bugfix to compile without MPP * * Revision 1.27 1996/10/25 18:46:01 fritz * Another bugfix in isdn_net_autohup() * * Revision 1.26 1996/10/23 23:05:36 fritz * Bugfix: Divide by zero in isdn_net_autohup() * * Revision 1.25 1996/10/22 23:13:58 fritz * Changes for compatibility to 2.0.X and 2.1.X kernels. * * Revision 1.24 1996/10/11 13:57:40 fritz * Bugfix: Error in BogoCPS calculation. * * Revision 1.23 1996/09/23 01:58:08 fritz * Fix: With syncPPP encapsulation, discard LCP packets * when calculating hangup timeout. * * Revision 1.22 1996/09/23 00:03:37 fritz * Fix: did not compile without CONFIG_ISDN_PPP * * Revision 1.21 1996/09/07 12:44:50 hipp * (hopefully) fixed callback problem with syncPPP * syncPPP network devices now show PPP link encap * * Revision 1.20 1996/08/29 20:06:03 fritz * Bugfix: Transmission timeout had been much to low. * * Revision 1.19 1996/08/12 16:24:32 hipp * removed some (now) obsolete functions for syncPPP in rebuild_header etc. * * Revision 1.18 1996/07/03 13:48:51 hipp * bugfix: Call dev_purge_queues() only for master device * * Revision 1.17 1996/06/25 18:37:37 fritz * Fixed return count for empty return string in isdn_net_getphones(). * * Revision 1.16 1996/06/24 17:48:08 fritz * Bugfixes: * - Did not free channel on unbinding. * - ioctl returned wrong callback settings. * * Revision 1.15 1996/06/16 17:42:54 tsbogend * fixed problem with IP addresses on Linux/Alpha (long is 8 byte there) * * Revision 1.14 1996/06/11 14:54:08 hipp * minor bugfix in isdn_net_send_skb * changes in BSENT callback handler for syncPPP * added lp->sav_skb stuff * * Revision 1.13 1996/06/06 14:25:44 fritz * Changed loglevel of "incoming ... without OAD" message, since * with audio support this is quite normal. * * Revision 1.12 1996/06/05 02:36:45 fritz * Minor bugfixes by M. Hipp. * * Revision 1.11 1996/05/18 01:36:59 fritz * Added spelling corrections and some minor changes * to stay in sync with kernel. * * Revision 1.10 1996/05/17 03:49:01 fritz * Some cleanup. * * Revision 1.9 1996/05/06 11:34:57 hipp * fixed a few bugs * * Revision 1.8 1996/04/30 21:04:40 fritz * Test commit * * Revision 1.7 1996/04/30 11:10:42 fritz * Added Michael's ippp-bind patch. * * Revision 1.6 1996/04/30 09:34:35 fritz * Removed compatibility-macros. * * Revision 1.5 1996/04/20 16:28:38 fritz * Made more parameters of the dial statemachine user-configurable and * added hangup after dial for more reliability using callback. * Changed all io going through generic routines in isdn_common.c * Added missing call to dev_free_skb on failed dialing. * Added uihdlc encapsulation. * Fixed isdn_net_setcfg not to destroy interface-flags anymore. * Misc. typos. * * Revision 1.4 1996/02/19 15:23:38 fritz * Bugfix: Sync-PPP packets got compressed twice, when resent due to * send-queue-full reject. * * Revision 1.3 1996/02/11 02:22:28 fritz * Changed status- receive-callbacks to use pointer-arrays for finding * a corresponding interface instead of looping over all interfaces. * Activate Auto-hangup-timer only when interface is online. * Some bugfixes in the dialing-statemachine. * Lot of bugfixes in sk_buff'ized encapsulation handling. * For speedup connection-setup after dialing, remember sk_buf that triggered * dialing. * Fixed isdn_net_log_packet according to different encapsulations. * Correct ARP-handling for ETHERNET-encapsulation. * * Revision 1.2 1996/01/22 05:05:12 fritz * Changed returncode-logic for isdn_net_start_xmit() and its * helper-functions. * Changed handling of buildheader for RAWIP and ETHERNET-encapsulation. * * Revision 1.1 1996/01/09 04:12:34 fritz * Initial revision * */ #include <linux/config.h> #define __NO_VERSION__ #include <linux/module.h> #include <linux/isdn.h> #include <linux/if_arp.h> #include <net/arp.h> #include <net/icmp.h> #include "isdn_common.h" #include "isdn_net.h" #ifdef CONFIG_ISDN_PPP #include "isdn_ppp.h" #endif /* Prototypes */ int isdn_net_force_dial_lp(isdn_net_local *); static int isdn_net_wildmat(char *s, char *p); static int isdn_net_start_xmit(struct sk_buff *, struct device *); static int isdn_net_xmit(struct device *, isdn_net_local *, struct sk_buff *); static void dev_purge_queues(struct device *dev); /* move this to net/core/dev.c */ char *isdn_net_revision = "$Revision: 1.1.1.1 $"; /* * Code for raw-networking over ISDN */ static void isdn_net_unreachable(struct device *dev, struct sk_buff *skb, char *reason) { int i; if(skb != NULL) { u_short proto = ntohs(skb->protocol); printk(KERN_DEBUG "isdn_net: %s: %s, send ICMP %s\n", dev->name, (reason != NULL) ? reason : "reason unknown", (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "" ); if(proto == ETH_P_IP) { icmp_send(skb, ICMP_DEST_UNREACH, ICMP_NET_UNKNOWN, 0 #if (LINUX_VERSION_CODE < 0x02010f) /* 2.1.15 */ ,dev #endif ); } } else { /* dial not triggered by rawIP packet */ printk(KERN_DEBUG "isdn_net: %s: %s\n", dev->name, (reason != NULL) ? reason : "reason unknown"); } for(i = 0; i < DEV_NUMBUFFS; i++) { struct sk_buff *skb; while((skb = skb_dequeue(&dev->buffs[i]))) { if(ntohs(skb->protocol) == ETH_P_IP) { icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0 #if (LINUX_VERSION_CODE < 0x02010f) /* 2.1.15 */ , dev #endif ); } dev_kfree_skb(skb, FREE_WRITE); } } } static void isdn_net_reset(struct device *dev) { ulong flags; save_flags(flags); cli(); /* Avoid glitch on writes to CMD regs */ dev->interrupt = 0; dev->tbusy = 0; restore_flags(flags); } /* Open/initialize the board. */ static int isdn_net_open(struct device *dev) { int i; struct device *p; isdn_net_reset(dev); dev->start = 1; /* Fill in the MAC-level header. */ for (i = 0; i < ETH_ALEN - sizeof(u32); i++) dev->dev_addr[i] = 0xfc; memcpy(&(dev->dev_addr[i]), &dev->pa_addr, sizeof(u32)); /* If this interface has slaves, start them also */ if ((p = (((isdn_net_local *) dev->priv)->slave))) { while (p) { isdn_net_reset(p); p->start = 1; p = (((isdn_net_local *) p->priv)->slave); } } isdn_MOD_INC_USE_COUNT(); return 0; } /* * Assign an ISDN-channel to a net-interface */ static void isdn_net_bind_channel(isdn_net_local * lp, int idx) { ulong flags; save_flags(flags); cli(); lp->isdn_device = dev->drvmap[idx]; lp->isdn_channel = dev->chanmap[idx]; dev->rx_netdev[idx] = lp->netdev; dev->st_netdev[idx] = lp->netdev; restore_flags(flags); } static inline void isdn_net_unbind_ptr_idx(int idx) { if (idx != -1) { dev->rx_netdev[idx] = NULL; dev->st_netdev[idx] = NULL; } } static inline void isdn_net_unbind_ptr(int drv, int ch) { isdn_net_unbind_ptr_idx(isdn_dc2minor(drv, ch)); } /* * unbind a net-interface (resets interface after an error) */ static void isdn_net_unbind_channel(isdn_net_local * lp) { ulong flags; save_flags(flags); cli(); if (lp->first_skb) { dev_kfree_skb(lp->first_skb, FREE_WRITE); lp->first_skb = NULL; } if (lp->sav_skb) { dev_kfree_skb(lp->sav_skb, FREE_WRITE); lp->sav_skb = NULL; } if (!lp->master) /* purge only for master device */ dev_purge_queues(&lp->netdev->dev); lp->dialstate = 0; if (lp->isdn_device != -1 && lp->isdn_device != -1) { isdn_net_unbind_ptr(lp->isdn_device, lp->isdn_channel); isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET); } lp->flags &= ~ISDN_NET_CONNECTED; lp->isdn_device = -1; lp->isdn_channel = -1; restore_flags(flags); } /* * Perform auto-hangup and cps-calculation for net-interfaces. * * auto-hangup: * Increment idle-counter (this counter is reset on any incoming or * outgoing packet), if counter exceeds configured limit either do a * hangup immediately or - if configured - wait until just before the next * charge-info. * * cps-calculation (needed for dynamic channel-bundling): * Since this function is called every second, simply reset the * byte-counter of the interface after copying it to the cps-variable. */ unsigned long last_jiffies = -HZ; void isdn_net_autohup() { isdn_net_dev *p = dev->netdev; int anymore; anymore = 0; while (p) { isdn_net_local *l = (isdn_net_local *) & (p->local); if ((jiffies - last_jiffies) == 0) l->cps = l->transcount; else l->cps = (l->transcount * HZ) / (jiffies - last_jiffies); l->transcount = 0; if (dev->net_verbose > 3) printk(KERN_DEBUG "%s: %d bogocps\n", l->name, l->cps); if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) { anymore = 1; l->huptimer++; /* * if there is some dialmode where timeout-hangup * should _not_ be done, check for that here and * 35 lines below (ifdef CONFIG_ISDN_BUDGET) * eg: (ISDN_NET_DIALMODE(*l) != ISDN_NET_DM_NOTIMEOUT) */ if ((l->onhtime) && (l->huptimer > l->onhtime)) if (l->hupflags & ISDN_MANCHARGE && l->hupflags & ISDN_CHARGEHUP) { while (jiffies - l->chargetime > l->chargeint) l->chargetime += l->chargeint; if (jiffies - l->chargetime >= l->chargeint - 2 * HZ) if (l->outgoing || l->hupflags & ISDN_INHUP) isdn_net_hangup(&p->dev); } else if (l->outgoing) { if (l->hupflags & ISDN_CHARGEHUP) { if (l->hupflags & ISDN_WAITCHARGE) { printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n", l->name, l->hupflags); isdn_net_hangup(&p->dev); } else if (jiffies - l->chargetime > l->chargeint) { printk(KERN_DEBUG "isdn_net: %s: chtime = %d, chint = %d\n", l->name, l->chargetime, l->chargeint); isdn_net_hangup(&p->dev); } } else isdn_net_hangup(&p->dev); } else if (l->hupflags & ISDN_INHUP) isdn_net_hangup(&p->dev); if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(p->local) == ISDN_NET_DM_OFF)) { isdn_net_hangup(&p->dev); break; } } p = (isdn_net_dev *) p->next; } last_jiffies = jiffies; isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore); } /* * Handle status-messages from ISDN-interfacecard. * This function is called from within the main-status-dispatcher * isdn_status_callback, which itself is called from the low-level driver. * Return: 1 = Event handled, 0 = not for us or unknown Event. */ int isdn_net_stat_callback(int idx, isdn_ctrl *c) { isdn_net_dev *p = dev->st_netdev[idx]; if (p) { isdn_net_local *lp = &(p->local); int cmd = c->command; switch (cmd) { case ISDN_STAT_BSENT: /* A packet has successfully been sent out */ if ((lp->flags & ISDN_NET_CONNECTED) && (!lp->dialstate)) { lp->stats.tx_packets++; if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP && lp->sav_skb) { struct device *mdev; if (lp->master) mdev = lp->master; else mdev = &lp->netdev->dev; if (!isdn_net_send_skb(mdev, lp, lp->sav_skb)) { lp->sav_skb = NULL; mark_bh(NET_BH); } else { return 1; } } if (test_and_clear_bit(0, (void *) &(p->dev.tbusy))) mark_bh(NET_BH); } return 1; case ISDN_STAT_DCONN: /* D-Channel is up */ switch (lp->dialstate) { case 4: case 7: case 8: lp->dialstate++; return 1; case 12: case 13: lp->dialstate = 5; return 1; } break; case ISDN_STAT_DHUP: /* Either D-Channel-hangup or error during dialout */ if (lp->flags & ISDN_NET_CONNECTED) { printk(KERN_INFO "%s: remote %s (%d)\n", lp->name, lp->dialstate?"abort":"hangup", lp->dialstate); printk(KERN_INFO "%s: Chargesum is %d\n", lp->name, lp->charge); printk(KERN_DEBUG "idx=%d drv=%d ch=%d\n",idx, lp->isdn_device, lp->isdn_channel); if (!lp->dialstate) { isdn_all_eaz(lp->isdn_device, lp->isdn_channel); #ifdef CONFIG_ISDN_PPP isdn_ppp_free(lp); #endif isdn_net_unbind_channel(lp); } else { switch (lp->dialstate) { case 4: case 5: case 6: case 7: case 8: case 9: lp->dialstate = 3; break; case 11: break; case 12: { isdn_ctrl cmd; printk(KERN_INFO "%s: got reject, waiting for callback ...\n", p->local.name); p->local.dtimer = 0; p->local.dialstate = 13; cmd.driver = p->local.isdn_device; cmd.command = ISDN_CMD_HANGUP; cmd.arg = p->local.isdn_channel; isdn_command(&cmd); isdn_all_eaz(p->local.isdn_device, p->local.isdn_channel); } /* Fall through */ case 13: break; } } return 1; } break; case ISDN_STAT_BCONN: /* B-Channel is up */ switch (lp->dialstate) { case 5: case 6: case 7: case 8: case 9: case 10: case 12: if (lp->dialstate <= 6) { dev->usage[idx] |= ISDN_USAGE_OUTGOING; isdn_info_update(); } else dev->rx_netdev[idx] = p; lp->dialstate = 0; isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1); printk(KERN_INFO "isdn_net: %s connected\n", lp->name); /* If first Chargeinfo comes before B-Channel connect, * we correct the timestamp here. */ lp->chargetime = jiffies; printk(KERN_DEBUG "isdn_net: chargetime of %s now %d\n", lp->name, lp->chargetime); /* Immediately send first skb to speed up arp */ #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) isdn_ppp_wakeup_daemon(lp); #endif if (lp->first_skb) { if (!(isdn_net_xmit(&p->dev, lp, lp->first_skb))) lp->first_skb = NULL; } return 1; } break; case ISDN_STAT_NODCH: /* No D-Channel avail. */ if (lp->dialstate == 4) { lp->dialstate--; return 1; } break; case ISDN_STAT_CINF: /* Charge-info from TelCo. Calculate interval between * charge-infos and set timestamp for last info for * usage by isdn_net_autohup() */ lp->charge++; if (lp->hupflags & ISDN_HAVECHARGE) { lp->hupflags &= ~ISDN_WAITCHARGE; lp->chargeint = jiffies - lp->chargetime - (2 * HZ); } if (lp->hupflags & ISDN_WAITCHARGE) lp->hupflags |= ISDN_HAVECHARGE; lp->chargetime = jiffies; printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %d\n", lp->name, lp->chargetime); return 1; } } return 0; } /* * Check, if a number contains wildcard-characters, in which case it * is for incoming purposes only. */ static int isdn_net_checkwild(char *num) { return ((strchr(num, '?')) || (strchr(num, '*')) || (strchr(num, '[')) || (strchr(num, ']')) || (strchr(num, '^'))); } /* * Perform dialout for net-interfaces and timeout-handling for * D-Channel-up and B-Channel-up Messages. * This function is initially called from within isdn_net_start_xmit() or * or isdn_net_find_icall() after initializing the dialstate for an * interface. If further calls are needed, the function schedules itself * for a timer-callback via isdn_timer_function(). * The dialstate is also affected by incoming status-messages from * the ISDN-Channel which are handled in isdn_net_stat_callback() above. */ void isdn_net_dial(void) { isdn_net_dev *p = dev->netdev; int anymore = 0; int i; int flags; isdn_ctrl cmd; while (p) { #ifdef ISDN_DEBUG_NET_DIAL if (p->local.dialstate) printk(KERN_DEBUG "%s: dialstate=%d\n", p->local.name, p->local.dialstate); #endif switch (p->local.dialstate) { case 0: /* Nothing to do for this interface */ break; case 1: /* Initiate dialout. Set phone-number-pointer to first number * of interface. */ save_flags(flags); cli(); p->local.dial = p->local.phone[1]; restore_flags(flags); if (!p->local.dial) { printk(KERN_WARNING "%s: phone number deleted?\n", p->local.name); isdn_net_hangup(&p->dev); break; } anymore = 1; if(p->local.dialtimeout > 0) if(p->local.dialstarted == 0 || jiffies > (p->local.dialstarted + p->local.dialtimeout + p->local.dialwait)) { p->local.dialstarted = jiffies; p->local.dialwait_timer = 0; } p->local.dialstate++; /* Fall through */ case 2: /* Prepare dialing. Clear EAZ, then set EAZ. */ cmd.driver = p->local.isdn_device; cmd.arg = p->local.isdn_channel; cmd.command = ISDN_CMD_CLREAZ; isdn_command(&cmd); sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(p->local.msn, cmd.driver)); cmd.command = ISDN_CMD_SETEAZ; isdn_command(&cmd); p->local.dialretry = 0; anymore = 1; p->local.dialstate++; /* Fall through */ case 3: /* Setup interface, dial current phone-number, switch to next number. * If list of phone-numbers is exhausted, increment * retry-counter. */ if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(p->local) == ISDN_NET_DM_OFF)) { char *s; if (dev->global_flags & ISDN_GLOBAL_STOPPED) s = "dial suppressed: isdn system stopped"; else s = "dial suppressed: dialmode `off'"; isdn_net_unreachable(&p->dev, p->local.first_skb, s); isdn_net_hangup(&p->dev); break; } cmd.driver = p->local.isdn_device; cmd.command = ISDN_CMD_SETL2; cmd.arg = p->local.isdn_channel + (p->local.l2_proto << 8); isdn_command(&cmd); cmd.driver = p->local.isdn_device; cmd.command = ISDN_CMD_SETL3; cmd.arg = p->local.isdn_channel + (p->local.l3_proto << 8); isdn_command(&cmd); cmd.driver = p->local.isdn_device; cmd.arg = p->local.isdn_channel; save_flags(flags); cli(); if (!p->local.dial) { restore_flags(flags); printk(KERN_WARNING "%s: phone number deleted?\n", p->local.name); isdn_net_hangup(&p->dev); break; } if (!strcmp(p->local.dial->num, "LEASED")) { restore_flags(flags); p->local.dialstate = 4; printk(KERN_INFO "%s: Open leased line ...\n", p->local.name); } else { if(p->local.dialtimeout > 0) if(jiffies > (p->local.dialstarted + p->local.dialtimeout)) { restore_flags(flags); p->local.dialwait_timer = jiffies + p->local.dialwait; p->local.dialstarted = 0; isdn_net_unreachable(&p->dev, p->local.first_skb, "dial: timed out"); isdn_net_hangup(&p->dev); break; } sprintf(cmd.parm.setup.phone, "%s", p->local.dial->num); /* * Switch to next number or back to start if at end of list. */ if (!(p->local.dial = (isdn_net_phone *) p->local.dial->next)) { p->local.dial = p->local.phone[1]; p->local.dialretry++; if (p->local.dialretry > p->local.dialmax) { restore_flags(flags); if (p->local.dialtimeout == 0) { p->local.dialwait_timer = jiffies + p->local.dialwait; p->local.dialstarted = 0; isdn_net_unreachable(&p->dev, p->local.first_skb, "dial: tried all numbers dialmax times"); } isdn_net_hangup(&p->dev); break; } } restore_flags(flags); cmd.command = ISDN_CMD_DIAL; cmd.parm.setup.si1 = 7; cmd.parm.setup.si2 = 0; sprintf(cmd.parm.setup.eazmsn, "%s", isdn_map_eaz2msn(p->local.msn, cmd.driver)); i = isdn_dc2minor(p->local.isdn_device, p->local.isdn_channel); if (i >= 0) { strcpy(dev->num[i], cmd.parm.setup.phone); isdn_info_update(); } printk(KERN_INFO "%s: dialing %d %s...\n", p->local.name, p->local.dialretry, cmd.parm.setup.phone); p->local.dtimer = 0; #ifdef ISDN_DEBUG_NET_DIAL printk(KERN_DEBUG "dial: d=%d c=%d\n", p->local.isdn_device, p->local.isdn_channel); #endif cmd.driver = p->local.isdn_device; isdn_command(&cmd); } p->local.huptimer = 0; p->local.outgoing = 1; if (p->local.chargeint) { p->local.hupflags |= ISDN_HAVECHARGE; p->local.hupflags &= ~ISDN_WAITCHARGE; } else { p->local.hupflags |= ISDN_WAITCHARGE; p->local.hupflags &= ~ISDN_HAVECHARGE; } anymore = 1; if (p->local.flags & ISDN_NET_CBOUT) { p->local.dialstate = (p->local.cbdelay) ? 12 : 13; } else p->local.dialstate = 4; break; case 4: case 13: /* Wait for D-Channel-connect. * If timeout, switch back to state 3. * Dialmax-handling moved to state 3. */ if (p->local.dtimer++ > ISDN_TIMER_DTIMEOUT10) p->local.dialstate = 3; anymore = 1; break; case 5: /* Got D-Channel-Connect, send B-Channel-request */ cmd.driver = p->local.isdn_device; cmd.arg = p->local.isdn_channel; cmd.command = ISDN_CMD_ACCEPTB; anymore = 1; p->local.dtimer = 0; p->local.dialstate++; isdn_command(&cmd); break; case 6: /* Wait for B- or D-Channel-connect. If timeout, * switch back to state 3. * Dialmax-handling moved to state 3. */ #ifdef ISDN_DEBUG_NET_DIAL printk(KERN_DEBUG "dialtimer2: %d\n", p->local.dtimer); #endif if (p->local.dtimer++ > ISDN_TIMER_DTIMEOUT10) p->local.dialstate = 3; anymore = 1; break; case 7: /* Got incoming Call, setup L2 and L3 protocols, * then wait for D-Channel-connect */ #ifdef ISDN_DEBUG_NET_DIAL printk(KERN_DEBUG "dialtimer4: %d\n", p->local.dtimer); #endif cmd.driver = p->local.isdn_device; cmd.command = ISDN_CMD_SETL2; cmd.arg = p->local.isdn_channel + (p->local.l2_proto << 8); isdn_command(&cmd); cmd.driver = p->local.isdn_device; cmd.command = ISDN_CMD_SETL3; cmd.arg = p->local.isdn_channel + (p->local.l3_proto << 8); isdn_command(&cmd); if (p->local.dtimer++ > ISDN_TIMER_DTIMEOUT15) isdn_net_hangup(&p->dev); else { anymore = 1; p->local.dialstate++; } break; case 9: /* Got incoming D-Channel-Connect, send B-Channel-request */ cmd.driver = p->local.isdn_device; cmd.arg = p->local.isdn_channel; cmd.command = ISDN_CMD_ACCEPTB; isdn_command(&cmd); anymore = 1; p->local.dtimer = 0; p->local.dialstate++; break; case 8: case 10: /* Wait for B- or D-channel-connect */ #ifdef ISDN_DEBUG_NET_DIAL printk(KERN_DEBUG "dialtimer4: %d\n", p->local.dtimer); #endif if (p->local.dtimer++ > ISDN_TIMER_DTIMEOUT60) isdn_net_hangup(&p->dev); else anymore = 1; break; case 11: /* Callback Delay */ if (p->local.dtimer++ > p->local.cbdelay) p->local.dialstate = 1; anymore = 1; break; case 12: /* Remote does callback. Hangup after cbdelay, then wait for incoming * call (in state 13). */ if (p->local.dtimer++ > p->local.cbdelay) { printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->local.name); p->local.dtimer = 0; p->local.dialstate = 13; cmd.driver = p->local.isdn_device; cmd.command = ISDN_CMD_HANGUP; cmd.arg = p->local.isdn_channel; isdn_command(&cmd); isdn_all_eaz(p->local.isdn_device, p->local.isdn_channel); } anymore = 1; break; default: printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n", p->local.dialstate, p->local.name); } p = (isdn_net_dev *) p->next; } isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore); } /* * Perform hangup for a net-interface. */ void isdn_net_hangup(struct device *d) { isdn_net_local *lp = (isdn_net_local *) d->priv; isdn_ctrl cmd; if (lp->flags & ISDN_NET_CONNECTED) { lp->flags &= ~ISDN_NET_CONNECTED; printk(KERN_INFO "isdn_net: local hangup %s\n", lp->name); #ifdef CONFIG_ISDN_PPP isdn_ppp_free(lp); #endif if ((lp->isdn_device != -1) && (lp->isdn_channel != -1)) { cmd.driver = lp->isdn_device; cmd.command = ISDN_CMD_HANGUP; cmd.arg = lp->isdn_channel; isdn_command(&cmd); isdn_all_eaz(lp->isdn_device, lp->isdn_channel); } printk(KERN_INFO "%s: Chargesum is %d\n", lp->name, lp->charge); } isdn_net_unbind_channel(lp); } typedef struct { unsigned short source; unsigned short dest; } ip_ports; static void isdn_net_log_packet(u_char * buf, isdn_net_local * lp) { u_char *p = buf; unsigned short proto = ETH_P_IP; int data_ofs; ip_ports *ipp; char addinfo[100]; addinfo[0] = '\0'; switch (lp->p_encap) { case ISDN_NET_ENCAP_IPTYP: proto = ntohs(*(unsigned short *) &buf[0]); p = &buf[2]; break; case ISDN_NET_ENCAP_ETHER: proto = ntohs(*(unsigned short *) &buf[12]); p = &buf[14]; break; case ISDN_NET_ENCAP_CISCOHDLC: proto = ntohs(*(unsigned short *) &buf[2]); p = &buf[4]; break; #ifdef CONFIG_ISDN_PPP case ISDN_NET_ENCAP_SYNCPPP: /* jump over fake header. */ p = &buf[IPPP_MAX_HEADER]; break; #endif } data_ofs = ((p[0] & 15) * 4); switch (proto) { case ETH_P_IP: switch (p[9]) { case 1: strcpy(addinfo, " ICMP"); break; case 2: strcpy(addinfo, " IGMP"); break; case 4: strcpy(addinfo, " IPIP"); break; case 6: ipp = (ip_ports *) (&p[data_ofs]); sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source), ntohs(ipp->dest)); break; case 8: strcpy(addinfo, " EGP"); break; case 12: strcpy(addinfo, " PUP"); break; case 17: ipp = (ip_ports *) (&p[data_ofs]); sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source), ntohs(ipp->dest)); break; case 22: strcpy(addinfo, " IDP"); break; } printk(KERN_INFO "OPEN: %d.%d.%d.%d -> %d.%d.%d.%d%s\n", p[12], p[13], p[14], p[15], p[16], p[17], p[18], p[19], addinfo); break; case ETH_P_ARP: printk(KERN_INFO "OPEN: ARP %d.%d.%d.%d -> *.*.*.* ?%d.%d.%d.%d\n", p[14], p[15], p[16], p[17], p[24], p[25], p[26], p[27]); break; } } /* * Generic routine to send out an skbuf. * If lowlevel-device does not support supports skbufs, use * standard send-routine, else send directly. * * Return: 0 on success, !0 on failure. * Side-effects: ndev->tbusy is cleared on success. */ int isdn_net_send_skb(struct device *ndev, isdn_net_local * lp, struct sk_buff *skb) { int ret; int len = skb->len; /* save len */ ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, skb); if (ret == len) { lp->transcount += len; clear_bit(0, (void *) &(ndev->tbusy)); return 0; } if (ret < 0) { dev_kfree_skb(skb, FREE_WRITE); lp->stats.tx_errors++; clear_bit(0, (void *) &(ndev->tbusy)); return 0; } return 1; } /* * Helper function for isdn_net_start_xmit. * When called, the connection is already established. * Based on cps-calculation, check if device is overloaded. * If so, and if a slave exists, trigger dialing for it. * If any slave is online, deliver packets using a simple round robin * scheme. * * Return: 0 on success, !0 on failure. */ static int isdn_net_xmit(struct device *ndev, isdn_net_local * lp, struct sk_buff *skb) { int ret; /* For the other encaps the header has already been built */ #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) { return isdn_ppp_xmit(skb, ndev); } #endif /* Reset hangup-timeout */ lp->huptimer = 0; if (lp->cps > lp->triggercps) { /* Device overloaded */ /* * Packet-delivery via round-robin over master * and all connected slaves. */ if (lp->master) /* Slaves always deliver themselves */ ret = isdn_net_send_skb(ndev, lp, skb); else { isdn_net_local *slp = (isdn_net_local *) (lp->srobin->priv); /* Master delivers via srobin and maintains srobin */ if (lp->srobin == ndev) ret = isdn_net_send_skb(ndev, lp, skb); else ret = ndev->tbusy = isdn_net_start_xmit(skb, lp->srobin); lp->srobin = (slp->slave) ? slp->slave : ndev; slp = (isdn_net_local *) (lp->srobin->priv); if (!((slp->flags & ISDN_NET_CONNECTED) && (slp->dialstate == 0))) lp->srobin = ndev; } /* Slave-startup using delay-variable */ if (lp->slave) { if (!lp->sqfull) { /* First time overload: set timestamp only */ lp->sqfull = 1; lp->sqfull_stamp = jiffies; } else { /* subsequent overload: if slavedelay exceeded, start dialing */ if ((jiffies - lp->sqfull_stamp) > lp->slavedelay) isdn_net_force_dial_lp((isdn_net_local *) lp->slave->priv); } } } else { /* Not overloaded, deliver locally */ ret = isdn_net_send_skb(ndev, lp, skb); if (lp->sqfull && ((jiffies - lp->sqfull_stamp) > (lp->slavedelay + (10 * HZ)))) lp->sqfull = 0; } return ret; } /* * Try sending a packet. * If this interface isn't connected to a ISDN-Channel, find a free channel, * and start dialing. */ int isdn_net_start_xmit(struct sk_buff *skb, struct device *ndev) { isdn_net_local *lp = (isdn_net_local *) ndev->priv; if (ndev->tbusy) { if (jiffies - ndev->trans_start < (2 * HZ)) return 1; if (!lp->dialstate) lp->stats.tx_errors++; ndev->tbusy = 0; ndev->trans_start = jiffies; } if (skb == NULL) { dev_tint(ndev); return 0; } /* Avoid timer-based retransmission conflicts. */ if (test_and_set_bit(0, (void *) &ndev->tbusy) != 0) printk(KERN_WARNING "%s: Transmitter access conflict.\n", ndev->name); else { u_char *buf = skb->data; #ifdef ISDN_DEBUG_NET_DUMP isdn_dumppkt("S:", buf, skb->len, 40); #endif if (!(lp->flags & ISDN_NET_CONNECTED)) { int chi; /* only do autodial if allowed by config */ if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) { isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'"); dev_kfree_skb(skb, FREE_WRITE); ndev->tbusy = 0; return 0; } if (lp->phone[1]) { ulong flags; save_flags(flags); cli(); if(lp->dialwait_timer <= 0) if(lp->dialstarted > 0 && lp->dialtimeout > 0 && jiffies < lp->dialstarted + lp->dialtimeout + lp->dialwait) lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait; if(lp->dialwait_timer > 0) { if(jiffies < lp->dialwait_timer) { /* printk("reject: jiffies=%ld, started=%ld, timeout=%d, wait=%ld, timer=%ld\n", jiffies, lp->dialstarted, lp->dialtimeout, lp->dialwait, lp->dialwait_timer); */ /* printk(KERN_WARNING "isdn_net: Dial rejected %s, packet dropped\n", ndev->name); */ isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached"); dev_kfree_skb(skb, FREE_WRITE); ndev->tbusy = 0; restore_flags(flags); return 0; } else lp->dialwait_timer = 0; } /* Grab a free ISDN-Channel */ if (((chi = isdn_get_free_channel(ISDN_USAGE_NET, lp->l2_proto, lp->l3_proto, lp->pre_device, lp->pre_channel)) < 0) && ((chi = isdn_get_free_channel(ISDN_USAGE_NET, lp->l2_proto, lp->l3_proto, lp->pre_device, lp->pre_channel^1)) < 0)) { restore_flags(flags); #if 0 printk(KERN_WARNING "isdn_net_start_xmit: No channel for %s\n", ndev->name); /* we probably should drop the skb here and return 0 to omit 'socket destroy delayed' messages */ return 1; #else isdn_net_unreachable(ndev, skb, "No channel"); dev_kfree_skb(skb, FREE_WRITE); ndev->tbusy = 0; return 0; #endif } /* Log packet, which triggered dialing */ if (dev->net_verbose) isdn_net_log_packet(buf, lp); lp->dialstate = 1; lp->flags |= ISDN_NET_CONNECTED; /* Connect interface with channel */ isdn_net_bind_channel(lp, chi); #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) { /* no 'first_skb' handling for syncPPP */ if (isdn_ppp_bind(lp) < 0) { dev_kfree_skb(skb, FREE_WRITE); isdn_net_unbind_channel(lp); restore_flags(flags); return 0; /* STN (skb to nirvana) ;) */ } restore_flags(flags); isdn_net_dial(); /* Initiate dialing */ return 1; /* let upper layer requeue skb packet */ } #endif /* remember first skb to speed up arp * when using encap ETHER */ if (lp->first_skb) { printk(KERN_DEBUG "isdn_net_start_xmit: First skb already set!\n"); dev_kfree_skb(lp->first_skb, FREE_WRITE); lp->first_skb = NULL; } lp->first_skb = skb; /* Initiate dialing */ ndev->tbusy = 0; restore_flags(flags); isdn_net_dial(); return 0; } else { isdn_net_unreachable(ndev, skb, "No phone number"); dev_kfree_skb(skb, FREE_WRITE); ndev->tbusy = 0; return 0; } } else { /* Connection is established, try sending */ ndev->trans_start = jiffies; if (!lp->dialstate) { if (lp->first_skb) { if (isdn_net_xmit(ndev, lp, lp->first_skb)) return 1; lp->first_skb = NULL; } return (isdn_net_xmit(ndev, lp, skb)); } else ndev->tbusy = 1; } } return 1; } /* * Shutdown a net-interface. */ static int isdn_net_close(struct device *dev) { struct device *p; dev->tbusy = 1; dev->start = 0; if ((p = (((isdn_net_local *) dev->priv)->slave))) { /* If this interface has slaves, stop them also */ while (p) { isdn_net_hangup(p); p->tbusy = 1; p->start = 0; p = (((isdn_net_local *) p->priv)->slave); } } isdn_net_hangup(dev); isdn_MOD_DEC_USE_COUNT(); return 0; } /* * Get statistics */ static struct enet_statistics * isdn_net_get_stats(struct device *dev) { isdn_net_local *lp = (isdn_net_local *) dev->priv; return &lp->stats; } /* This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN * instead of dev->hard_header_len off. This is done because the * lowlevel-driver has already pulled off its stuff when we get * here and this routine only gets called with p_encap == ETHER. * Determine the packet's protocol ID. The rule here is that we * assume 802.3 if the type field is short enough to be a length. * This is normal practice and works for any 'now in use' protocol. */ static unsigned short isdn_net_type_trans(struct sk_buff *skb, struct device *dev) { struct ethhdr *eth; unsigned char *rawp; skb_pull(skb, ETH_HLEN); eth = skb->mac.ethernet; if (*eth->h_dest & 1) { if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0) skb->pkt_type = PACKET_BROADCAST; else skb->pkt_type = PACKET_MULTICAST; } /* * This ALLMULTI check should be redundant by 1.4 * so don't forget to remove it. */ else if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN)) skb->pkt_type = PACKET_OTHERHOST; } if (ntohs(eth->h_proto) >= 1536) return eth->h_proto; rawp = skb->data; /* * This is a magic hack to spot IPX packets. Older Novell breaks * the protocol design and runs IPX over 802.3 without an 802.2 LLC * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This * won't work for fault tolerant netware but does for the rest. */ if (*(unsigned short *) rawp == 0xFFFF) return htons(ETH_P_802_3); /* * Real 802.2 LLC */ return htons(ETH_P_802_2); } /* * Got a packet from ISDN-Channel. */ static void isdn_net_receive(struct device *ndev, struct sk_buff *skb) { isdn_net_local *lp = (isdn_net_local *) ndev->priv; #ifdef CONFIG_ISDN_PPP isdn_net_local *olp = lp; /* original 'lp' */ int proto = PPP_PROTOCOL(skb->data); #endif lp->transcount += skb->len; lp->stats.rx_packets++; #ifdef CONFIG_ISDN_PPP /* * If encapsulation is syncppp, don't reset * huptimer on LCP packets. */ if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP || (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP && proto != PPP_LCP)) #endif lp->huptimer = 0; if (lp->master) { /* Bundling: If device is a slave-device, deliver to master, also * handle master's statistics and hangup-timeout */ ndev = lp->master; lp = (isdn_net_local *) ndev->priv; lp->stats.rx_packets++; #ifdef CONFIG_ISDN_PPP /* * If encapsulation is syncppp, don't reset * huptimer on LCP packets. */ if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP || (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP && proto != PPP_LCP)) #endif lp->huptimer = 0; } skb->dev = ndev; skb->pkt_type = PACKET_HOST; skb->mac.raw = skb->data; #ifdef ISDN_DEBUG_NET_DUMP isdn_dumppkt("R:", skb->data, skb->len, 40); #endif switch (lp->p_encap) { case ISDN_NET_ENCAP_ETHER: /* Ethernet over ISDN */ skb->protocol = isdn_net_type_trans(skb, ndev); break; case ISDN_NET_ENCAP_UIHDLC: /* HDLC with UI-frame (for ispa with -h1 option) */ skb_pull(skb, 2); /* Fall through */ case ISDN_NET_ENCAP_RAWIP: /* RAW-IP without MAC-Header */ skb->protocol = htons(ETH_P_IP); break; case ISDN_NET_ENCAP_CISCOHDLC: /* CISCO-HDLC IP with type field and fake I-frame-header */ skb_pull(skb, 2); /* Fall through */ case ISDN_NET_ENCAP_IPTYP: /* IP with type field */ skb->protocol = *(unsigned short *) &(skb->data[0]); skb_pull(skb, 2); if (*(unsigned short *) skb->data == 0xFFFF) skb->protocol = htons(ETH_P_802_3); break; #ifdef CONFIG_ISDN_PPP case ISDN_NET_ENCAP_SYNCPPP: isdn_ppp_receive(lp->netdev, olp, skb); return; #endif default: printk(KERN_WARNING "%s: unknown encapsulation, dropping\n", lp->name); kfree_skb(skb, FREE_READ); return; } netif_rx(skb); return; } /* * A packet arrived via ISDN. Search interface-chain for a corresponding * interface. If found, deliver packet to receiver-function and return 1, * else return 0. */ int isdn_net_rcv_skb(int idx, struct sk_buff *skb) { isdn_net_dev *p = dev->rx_netdev[idx]; if (p) { isdn_net_local *lp = &p->local; if ((lp->flags & ISDN_NET_CONNECTED) && (!lp->dialstate)) { isdn_net_receive(&p->dev, skb); return 1; } } return 0; } static int my_eth_header(struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) { struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN); /* * Set the protocol type. For a packet of type ETH_P_802_3 we * put the length here instead. It is up to the 802.2 layer to * carry protocol information. */ if (type != ETH_P_802_3) eth->h_proto = htons(type); else eth->h_proto = htons(len); /* * Set the source hardware address. */ if (saddr) memcpy(eth->h_source, saddr, dev->addr_len); else memcpy(eth->h_source, dev->dev_addr, dev->addr_len); /* * Anyway, the loopback-device should never use this function... */ if (dev->flags & IFF_LOOPBACK) { memset(eth->h_dest, 0, dev->addr_len); return (dev->hard_header_len); } if (daddr) { memcpy(eth->h_dest, daddr, dev->addr_len); return dev->hard_header_len; } return -dev->hard_header_len; } /* * build an header * depends on encaps that is being used. */ static int isdn_net_header(struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned plen) { isdn_net_local *lp = dev->priv; ushort len = 0; switch (lp->p_encap) { case ISDN_NET_ENCAP_ETHER: len = my_eth_header(skb, dev, type, daddr, saddr, plen); break; break; #ifdef CONFIG_ISDN_PPP case ISDN_NET_ENCAP_SYNCPPP: /* stick on a fake header to keep fragmentation code happy. */ len = IPPP_MAX_HEADER; skb_push(skb,len); break; #endif case ISDN_NET_ENCAP_RAWIP: printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n"); len = 0; break; case ISDN_NET_ENCAP_IPTYP: /* ethernet type field */ *((ushort *) skb_push(skb, 2)) = htons(type); len = 2; break; case ISDN_NET_ENCAP_UIHDLC: /* HDLC with UI-Frames (for ispa with -h1 option) */ *((ushort *) skb_push(skb, 2)) = htons(0x0103); len = 2; break; case ISDN_NET_ENCAP_CISCOHDLC: skb_push(skb, 4); skb->data[0] = 0x0f; skb->data[1] = 0x00; *((ushort *) & skb->data[2]) = htons(type); len = 4; break; } return len; } /* We don't need to send arp, because we have point-to-point connections. */ #if (LINUX_VERSION_CODE < 0x02010F) static int isdn_net_rebuild_header(void *buff, struct device *dev, unsigned long dst, struct sk_buff *skb) { isdn_net_local *lp = dev->priv; int ret = 0; if (lp->p_encap == ISDN_NET_ENCAP_ETHER) { struct ethhdr *eth = (struct ethhdr *) buff; /* * Only ARP/IP is currently supported */ if (eth->h_proto != htons(ETH_P_IP)) { printk(KERN_WARNING "isdn_net: %s don't know how to resolve type %d addresses?\n", dev->name, (int) eth->h_proto); memcpy(eth->h_source, dev->dev_addr, dev->addr_len); return 0; } /* * Try to get ARP to resolve the header. */ #ifdef CONFIG_INET ret = arp_find(eth->h_dest, dst, dev, dev->pa_addr, skb) ? 1 : 0; #endif } return ret; } #else static int isdn_net_rebuild_header(struct sk_buff *skb) { struct device *dev = skb->dev; isdn_net_local *lp = dev->priv; int ret = 0; if (lp->p_encap == ISDN_NET_ENCAP_ETHER) { struct ethhdr *eth = (struct ethhdr *) skb->data; /* * Only ARP/IP is currently supported */ if (eth->h_proto != htons(ETH_P_IP)) { printk(KERN_WARNING "isdn_net: %s don't know how to resolve type %d addresses?\n", dev->name, (int) eth->h_proto); memcpy(eth->h_source, dev->dev_addr, dev->addr_len); return 0; } /* * Try to get ARP to resolve the header. */ #ifdef CONFIG_INET ret = arp_find(eth->h_dest, skb) ? 1 : 0; #endif } return ret; } #endif /* * Interface-setup. (called just after registering a new interface) */ static int isdn_net_init(struct device *ndev) { ushort max_hlhdr_len = 0; isdn_net_local *lp = (isdn_net_local *) ndev->priv; int drvidx, i; if (ndev == NULL) { printk(KERN_WARNING "isdn_net_init: dev = NULL!\n"); return -ENODEV; } if (ndev->priv == NULL) { printk(KERN_WARNING "isdn_net_init: dev->priv = NULL!\n"); return -ENODEV; } ether_setup(ndev); #if (LINUX_VERSION_CODE < 0x02010F) lp->org_hcb = ndev->header_cache_bind; #else lp->org_hhc = ndev->hard_header_cache; #endif lp->org_hcu = ndev->header_cache_update; /* Setup the generic properties */ ndev->hard_header = NULL; #if (LINUX_VERSION_CODE < 0x02010F) ndev->header_cache_bind = NULL; #else ndev->hard_header_cache = NULL; #endif ndev->header_cache_update = NULL; ndev->mtu = 1500; ndev->flags = IFF_NOARP; ndev->family = AF_INET; ndev->type = ARPHRD_ETHER; ndev->addr_len = ETH_ALEN; ndev->pa_addr = 0; ndev->pa_brdaddr = 0; ndev->pa_mask = 0; ndev->pa_alen = 4; /* for clients with MPPP maybe higher values better */ ndev->tx_queue_len = 30; for (i = 0; i < ETH_ALEN; i++) ndev->broadcast[i] = 0xff; for (i = 0; i < DEV_NUMBUFFS; i++) skb_queue_head_init(&ndev->buffs[i]); /* The ISDN-specific entries in the device structure. */ ndev->open = &isdn_net_open; ndev->hard_start_xmit = &isdn_net_start_xmit; /* * up till binding we ask the protocol layer to reserve as much * as we might need for HL layer */ for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) if (dev->drv[drvidx]) if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen) max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen; ndev->hard_header_len = ETH_HLEN + max_hlhdr_len; ndev->stop = &isdn_net_close; ndev->get_stats = &isdn_net_get_stats; ndev->rebuild_header = &isdn_net_rebuild_header; #ifdef CONFIG_ISDN_PPP ndev->do_ioctl = isdn_ppp_dev_ioctl; #endif return 0; } /* * I picked the pattern-matching-functions from an old GNU-tar version (1.10) * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz) */ static int isdn_net_Star(char *s, char *p) { while (isdn_net_wildmat(s, p) == 0) if (*++s == '\0') return (0); return (1); } /* * Shell-type Pattern-matching for incoming caller-Ids * This function gets a string in s and checks, if it matches the pattern * given in p. It returns 1 on success, 0 otherwise. * * Possible Patterns: * * '?' matches one character * '*' matches zero or more characters * [xyz] matches the set of characters in brackets. * [^xyz] matches any single character not in the set of characters */ static int isdn_net_wildmat(char *s, char *p) { register int last; register int matched; register int reverse; for (; *p; s++, p++) switch (*p) { case '\\': /* * Literal match with following character, * fall through. */ p++; default: if (*s != *p) return (0); continue; case '?': /* Match anything. */ if (*s == '\0') return (0); continue; case '*': /* Trailing star matches everything. */ return (*++p ? isdn_net_Star(s, p) : 1); case '[': /* [^....] means inverse character class. */ if ((reverse = (p[1] == '^'))) p++; for (last = 0, matched = 0; *++p && (*p != ']'); last = *p) /* This next line requires a good C compiler. */ if (*p == '-' ? *s <= *++p && *s >= last : *s == *p) matched = 1; if (matched == reverse) return (0); continue; } return (*s == '\0'); } static void isdn_net_swapbind(int drvidx) { isdn_net_dev *p; #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx); #endif p = dev->netdev; while (p) { if (p->local.pre_device == drvidx) switch (p->local.pre_channel) { case 0: p->local.pre_channel = 1; break; case 1: p->local.pre_channel = 0; break; } p = (isdn_net_dev *) p->next; } } static void isdn_net_swap_usage(int i1, int i2) { int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE; int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE; #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2); #endif dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE; dev->usage[i1] |= u2; dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE; dev->usage[i2] |= u1; isdn_info_update(); } /* * An incoming call-request has arrived. * Search the interface-chain for an appropriate interface. * If found, connect the interface to the ISDN-channel and initiate * D- and B-Channel-setup. If secure-flag is set, accept only * configured phone-numbers. If callback-flag is set, initiate * callback-dialing. * * Return-Value: 0 = No appropriate interface for this call. * 1 = Call accepted * 2 = Reject call, wait cbdelay, then call back * 3 = Reject call * 4 = Wait cbdelay, then call back */ int isdn_net_find_icall(int di, isdn_ctrl *c, int idx) { char *eaz; int ch = c->arg; setup_parm *setup = &c->parm.setup; int si1; int si2; int ematch; int swapped; int sidx = 0; isdn_net_dev *p; isdn_net_phone *n; ulong flags; char nr[32]; /* Search name in netdev-chain */ save_flags(flags); cli(); if (!setup->phone[0]) { nr[0] = '0'; nr[1] = '\0'; printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n"); } else strcpy(nr, setup->phone); si1 = (int) setup->si1; si2 = (int) setup->si2; if (!setup->eazmsn[0]) { printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n"); eaz = "0"; } else eaz = setup->eazmsn; if (dev->net_verbose > 1) printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz); /* Accept only calls with Si1 = 7 (Data-Transmission) */ if (si1 != 7) { if (dev->net_verbose > 1) printk(KERN_INFO "isdn_net: Service-Indicator not 7, ignored\n"); restore_flags(flags); return 0; } n = (isdn_net_phone *) 0; ematch = 0; #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx, dev->usage[idx]); #endif swapped = 0; for (p = dev->netdev; p; p = (isdn_net_dev *) p->next) { /* If last check has triggered as binding-swap, revert it */ switch (swapped) { case 2: isdn_net_swap_usage(idx, sidx); /* fall through */ case 1: isdn_net_swapbind(di); break; } swapped = 0; if (strcmp(isdn_map_eaz2msn(p->local.msn, di), eaz)) continue; /* next loop for next device */ ematch = 1; /* EAZ matches! */ #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n", p->local.name, p->local.msn, p->local.flags, p->local.dialstate); #endif if ( (!(p->local.flags & ISDN_NET_CONNECTED) && /* not connected */ USG_NONE(dev->usage[idx])) /* and ch. unused */ || /* or */ (((p->local.dialstate == 4) || (p->local.dialstate == 12) || (p->local.dialstate == 13)) && /* if dialing */ !(p->local.flags & ISDN_NET_CALLBACK)) /* but no callback */ ) /*if*/ { #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n", p->local.pre_device, p->local.pre_channel); #endif if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) { if ((p->local.pre_channel != ch) || (p->local.pre_device != di)) { /* Here we got a problem: * If using an ICN-Card, an incoming call is always signaled on * on the first channel of the card, if both channels are * down. However this channel may be bound exclusive. If the * second channel is free, this call should be accepted. * The solution is horribly but it runs, so what: * We exchange the exclusive bindings of the two channels, the * corresponding variables in the interface-structs. */ if (ch == 0) { sidx = isdn_dc2minor(di, 1); #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: ch is 0\n"); #endif if (USG_NONE(dev->usage[sidx])) { /* Second Channel is free, now see if it is bound * exclusive too. */ if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) { #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n"); #endif /* Yes, swap bindings only, if the original * binding is bound to channel 1 of this driver */ if ((p->local.pre_device == di) && (p->local.pre_channel == 1)) { isdn_net_swapbind(di); swapped = 1; } else { /* ... else iterate next device */ continue; } } else { #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n"); #endif /* No, swap always and swap excl-usage also */ isdn_net_swap_usage(idx, sidx); isdn_net_swapbind(di); swapped = 2; } /* Now check for exclusive binding again */ #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: final check\n"); #endif if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) && ((p->local.pre_channel != ch) || (p->local.pre_device != di))) { #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: final check failed\n"); #endif continue; } } } else { /* We are already on the second channel, so nothing to do */ #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: already on 2nd channel\n"); #endif continue; } } } #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: match2\n"); #endif n = p->local.phone[0]; if (p->local.flags & ISDN_NET_SECURE) { while (n) { if (isdn_net_wildmat(nr, n->num)) break; n = (isdn_net_phone *) n->next; } } if (n || (!(p->local.flags & ISDN_NET_SECURE))) { isdn_net_local *lp = &(p->local); #ifdef ISDN_DEBUG_NET_ICALL printk(KERN_DEBUG "n_fi: match3\n"); #endif /* matching interface found */ /* * Is the state STOPPED? * If so, no dialin is allowed, * so reject actively. * */ if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) { restore_flags(flags); printk(KERN_INFO "incoming call, interface `%s' dialmode `off' -> rejected\n", lp->name); return 3; } /* * Is the interface up? * If not, reject the call actively. */ if (!p->dev.start) { restore_flags(flags); printk(KERN_INFO "incoming call, interface `%s' down -> rejected\n", lp->name); return 3; } /* Interface is up, now see if it's a slave. If so, see if * it's master and parent slave is online. If not, reject the call. */ if (lp->master) { isdn_net_local *mlp = (isdn_net_local *) lp->master->priv; printk(KERN_DEBUG "ICALLslv: %s\n", lp->name); printk(KERN_DEBUG "master=%s\n", mlp->name); if ((mlp->flags & ISDN_NET_CONNECTED) && (!mlp->dialstate)) { printk(KERN_DEBUG "master online\n"); /* Master is online, find parent-slave (master if first slave) */ while (mlp->slave) { if ((isdn_net_local *) mlp->slave->priv == lp) break; mlp = (isdn_net_local *) mlp->slave->priv; } } else printk(KERN_DEBUG "master offline\n"); /* Found parent, if it's offline iterate next device */ printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED); if (!(mlp->flags & ISDN_NET_CONNECTED) || mlp->dialstate) { continue; } } if (lp->flags & ISDN_NET_CALLBACK) { int chi; /* * Is the state MANUAL? * If so, no callback can be made, * so reject actively. * */ if (ISDN_NET_DIALMODE(*lp) != ISDN_NET_DM_AUTO) { restore_flags(flags); printk(KERN_INFO "incoming call for callback, interface `%s' dialmode not `auto' -> rejected\n", lp->name); return 3; } printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n", lp->name, nr, eaz); if (lp->phone[1]) { /* Grab a free ISDN-Channel */ if ((chi = isdn_get_free_channel(ISDN_USAGE_NET, lp->l2_proto, lp->l3_proto, lp->pre_device, lp->pre_channel)) < 0) { printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n", lp->name); restore_flags(flags); return 0; } /* Setup dialstate. */ lp->dtimer = 0; lp->dialstate = 11; lp->flags |= ISDN_NET_CONNECTED; /* Connect interface with channel */ isdn_net_bind_channel(lp, chi); #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) if (isdn_ppp_bind(lp) < 0) { isdn_net_unbind_channel(lp); restore_flags(flags); return 0; } #endif /* Initiate dialing by returning 2 or 4 */ restore_flags(flags); return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4; } else printk(KERN_WARNING "isdn_net: %s: No phone number\n", lp->name); restore_flags(flags); return 0; } else { printk(KERN_DEBUG "%s: call from %s -> %s accepted\n", lp->name, nr, eaz); /* if this interface is dialing, it does it probably on a different device, so free this device */ if (p->local.dialstate && ((p->local.isdn_device != di) || (p->local.isdn_channel != ch))) { #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) isdn_ppp_free(lp); #endif isdn_net_unbind_ptr(lp->isdn_device, lp->isdn_channel); isdn_free_channel(p->local.isdn_device, p->local.isdn_channel, ISDN_USAGE_NET); } dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE; dev->usage[idx] |= ISDN_USAGE_NET; strcpy(dev->num[idx], nr); isdn_info_update(); dev->st_netdev[idx] = lp->netdev; p->local.isdn_device = di; p->local.isdn_channel = ch; p->local.ppp_slot = -1; p->local.flags |= ISDN_NET_CONNECTED; p->local.dialstate = 7; p->local.dtimer = 0; p->local.outgoing = 0; p->local.huptimer = 0; p->local.hupflags |= ISDN_WAITCHARGE; p->local.hupflags &= ~ISDN_HAVECHARGE; #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) if (isdn_ppp_bind(lp) < 0) { isdn_net_unbind_channel(lp); restore_flags(flags); return 0; } #endif restore_flags(flags); return 1; } } } } /* If none of configured EAZ/MSN matched and not verbose, be silent */ if (!ematch || dev->net_verbose) printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz); restore_flags(flags); return 0; } /* * Search list of net-interfaces for an interface with given name. */ isdn_net_dev * isdn_net_findif(char *name) { isdn_net_dev *p = dev->netdev; while (p) { if (!strcmp(p->local.name, name)) return p; p = (isdn_net_dev *) p->next; } return (isdn_net_dev *) NULL; } /* * Force a net-interface to dial out. * This is called from the userlevel-routine below or * from isdn_net_start_xmit(). */ int isdn_net_force_dial_lp(isdn_net_local * lp) { if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) { int chi; if (lp->phone[1]) { ulong flags; save_flags(flags); cli(); /* Grab a free ISDN-Channel */ if ((chi = isdn_get_free_channel(ISDN_USAGE_NET, lp->l2_proto, lp->l3_proto, lp->pre_device, lp->pre_channel)) < 0) { printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n", lp->name); restore_flags(flags); return -EAGAIN; } lp->dialstate = 1; lp->flags |= ISDN_NET_CONNECTED; /* Connect interface with channel */ isdn_net_bind_channel(lp, chi); #ifdef CONFIG_ISDN_PPP if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) if (isdn_ppp_bind(lp) < 0) { isdn_net_unbind_channel(lp); restore_flags(flags); return -EAGAIN; } #endif /* Initiate dialing */ restore_flags(flags); isdn_net_dial(); return 0; } else return -EINVAL; } else return -EBUSY; } /* * Force a net-interface to dial out. * This is always called from within userspace (ISDN_IOCTL_NET_DIAL). */ int isdn_net_force_dial(char *name) { isdn_net_dev *p = isdn_net_findif(name); if (!p) return -ENODEV; return (isdn_net_force_dial_lp(&p->local)); } /* * Allocate a new network-interface and initialize its data structures. */ char * isdn_net_new(char *name, struct device *master) { isdn_net_dev *netdev; /* Avoid creating an existing interface */ if (isdn_net_findif(name)) { printk(KERN_WARNING "isdn_net: interface %s already exists\n", name); return NULL; } if (!(netdev = (isdn_net_dev *) kmalloc(sizeof(isdn_net_dev), GFP_KERNEL))) { printk(KERN_WARNING "isdn_net: Could not allocate net-device\n"); return NULL; } memset(netdev, 0, sizeof(isdn_net_dev)); if (name == NULL) strcpy(netdev->local.name, " "); else strcpy(netdev->local.name, name); netdev->dev.name = netdev->local.name; netdev->dev.priv = &netdev->local; netdev->dev.init = isdn_net_init; netdev->local.p_encap = ISDN_NET_ENCAP_RAWIP; if (master) { /* Device shall be a slave */ struct device *p = (((isdn_net_local *) master->priv)->slave); struct device *q = master; netdev->local.master = master; /* Put device at end of slave-chain */ while (p) { q = p; p = (((isdn_net_local *) p->priv)->slave); } ((isdn_net_local *) q->priv)->slave = &(netdev->dev); q->interrupt = 0; q->tbusy = 0; q->start = master->start; } else { /* Device shall be a master */ if (register_netdev(&netdev->dev) != 0) { printk(KERN_WARNING "isdn_net: Could not register net-device\n"); kfree(netdev); return NULL; } } netdev->local.magic = ISDN_NET_MAGIC; #ifdef CONFIG_ISDN_PPP netdev->mp_last = NULL; /* mpqueue is empty */ netdev->ib.next_num = 0; netdev->ib.last = NULL; #endif netdev->queue = &netdev->local; netdev->local.last = &netdev->local; netdev->local.netdev = netdev; netdev->local.next = &netdev->local; netdev->local.isdn_device = -1; netdev->local.isdn_channel = -1; netdev->local.pre_device = -1; netdev->local.pre_channel = -1; netdev->local.exclusive = -1; netdev->local.ppp_slot = -1; netdev->local.pppbind = -1; netdev->local.sav_skb = NULL; netdev->local.first_skb = NULL; netdev->local.l2_proto = ISDN_PROTO_L2_X75I; netdev->local.l3_proto = ISDN_PROTO_L3_TRANS; netdev->local.triggercps = 6000; netdev->local.slavedelay = 10 * HZ; netdev->local.srobin = &netdev->dev; netdev->local.hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */ netdev->local.onhtime = 10; /* Default hangup-time for saving costs of those who forget configuring this */ netdev->local.dialmax = 1; netdev->local.flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL; /* Hangup before Callback, manual dial */ netdev->local.cbdelay = 25; /* Wait 5 secs before Callback */ netdev->local.dialtimeout = -1; /* Infinite Dial-Timeout */ netdev->local.dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */ netdev->local.dialstarted = 0; /* Jiffies of last dial-start */ netdev->local.dialwait_timer = 0; /* Jiffies of earliest next dial-start */ /* Put into to netdev-chain */ netdev->next = (void *) dev->netdev; dev->netdev = netdev; return netdev->dev.name; } char * isdn_net_newslave(char *parm) { char *p = strchr(parm, ','); isdn_net_dev *n; char newname[10]; if (p) { /* Slave-Name MUST not be empty */ if (!strlen(p + 1)) return NULL; strcpy(newname, p + 1); *p = 0; /* Master must already exist */ if (!(n = isdn_net_findif(parm))) return NULL; /* Master must be a real interface, not a slave */ if (n->local.master) return NULL; /* Master must not be started yet */ if (n->dev.start) return NULL; return (isdn_net_new(newname, &(n->dev))); } return NULL; } /* * Set interface-parameters. * Always set all parameters, so the user-level application is responsible * for not overwriting existing setups. It has to get the current * setup first, if only selected parameters are to be changed. */ int isdn_net_setcfg(isdn_net_ioctl_cfg * cfg) { isdn_net_dev *p = isdn_net_findif(cfg->name); ulong features; int i; int drvidx; int chidx; char drvid[25]; if (p) { /* See if any registered driver supports the features we want */ features = (1 << cfg->l2_proto) | (256 << cfg->l3_proto); for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (dev->drv[i]) if ((dev->drv[i]->interface->features & features) == features) break; if (i == ISDN_MAX_DRIVERS) { printk(KERN_WARNING "isdn_net: No driver with selected features\n"); return -ENODEV; } if (p->local.p_encap != cfg->p_encap) if (p->dev.start) { printk(KERN_WARNING "%s: cannot change encap when if is up\n", p->local.name); return -EBUSY; } if (cfg->p_encap == ISDN_NET_ENCAP_SYNCPPP) { #ifndef CONFIG_ISDN_PPP printk(KERN_WARNING "%s: SyncPPP support not configured\n", p->local.name); return -EINVAL; #else p->dev.type = ARPHRD_PPP; /* change ARP type */ p->dev.addr_len = 0; #endif } if (strlen(cfg->drvid)) { /* A bind has been requested ... */ char *c, *e; drvidx = -1; chidx = -1; strcpy(drvid, cfg->drvid); if ((c = strchr(drvid, ','))) { /* The channel-number is appended to the driver-Id with a comma */ chidx = (int) simple_strtoul(c + 1, &e, 10); if (e == c) chidx = -1; *c = '\0'; } for (i = 0; i < ISDN_MAX_DRIVERS; i++) /* Lookup driver-Id in array */ if (!(strcmp(dev->drvid[i], drvid))) { drvidx = i; break; } if ((drvidx == -1) || (chidx == -1)) /* Either driver-Id or channel-number invalid */ return -ENODEV; } else { /* Parameters are valid, so get them */ drvidx = p->local.pre_device; chidx = p->local.pre_channel; } if (cfg->exclusive > 0) { int flags; /* If binding is exclusive, try to grab the channel */ save_flags(flags); if ((i = isdn_get_free_channel(ISDN_USAGE_NET, p->local.l2_proto, p->local.l3_proto, drvidx, chidx)) < 0) { /* Grab failed, because desired channel is in use */ p->local.exclusive = -1; restore_flags(flags); return -EBUSY; } /* All went ok, so update isdninfo */ dev->usage[i] = ISDN_USAGE_EXCLUSIVE; isdn_info_update(); restore_flags(flags); p->local.exclusive = i; } else { /* Non-exclusive binding or unbind. */ p->local.exclusive = -1; if ((p->local.pre_device != -1) && (cfg->exclusive == -1)) { isdn_unexclusive_channel(p->local.pre_device, p->local.pre_channel); isdn_free_channel(p->local.pre_device, p->local.pre_channel, ISDN_USAGE_NET); drvidx = -1; chidx = -1; } } strcpy(p->local.msn, cfg->eaz); p->local.pre_device = drvidx; p->local.pre_channel = chidx; p->local.onhtime = cfg->onhtime; p->local.charge = cfg->charge; p->local.l2_proto = cfg->l2_proto; p->local.l3_proto = cfg->l3_proto; p->local.cbdelay = cfg->cbdelay; p->local.dialmax = cfg->dialmax; p->local.triggercps = cfg->triggercps; p->local.slavedelay = cfg->slavedelay * HZ; p->local.pppbind = cfg->pppbind; p->local.dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1; p->local.dialwait = cfg->dialwait * HZ; if (cfg->secure) p->local.flags |= ISDN_NET_SECURE; else p->local.flags &= ~ISDN_NET_SECURE; if (cfg->cbhup) p->local.flags |= ISDN_NET_CBHUP; else p->local.flags &= ~ISDN_NET_CBHUP; switch (cfg->callback) { case 0: p->local.flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT); break; case 1: p->local.flags |= ISDN_NET_CALLBACK; p->local.flags &= ~ISDN_NET_CBOUT; break; case 2: p->local.flags |= ISDN_NET_CBOUT; p->local.flags &= ~ISDN_NET_CALLBACK; break; } p->local.flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */ if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) { /* old isdnctrl version, where only 0 or 1 is given */ printk(KERN_WARNING "Old isdnctrl version detected! Please update.\n"); p->local.flags |= ISDN_NET_DM_OFF; /* turn on 'off' bit */ } else { p->local.flags |= cfg->dialmode; /* turn on selected bits */ } if (cfg->chargehup) p->local.hupflags |= ISDN_CHARGEHUP; else p->local.hupflags &= ~ISDN_CHARGEHUP; if (cfg->ihup) p->local.hupflags |= ISDN_INHUP; else p->local.hupflags &= ~ISDN_INHUP; if (cfg->chargeint > 10) { p->local.hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE; p->local.chargeint = cfg->chargeint * HZ; } if (cfg->p_encap != p->local.p_encap) { if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) { p->dev.hard_header = NULL; #if (LINUX_VERSION_CODE < 0x02010F) p->dev.header_cache_bind = NULL; #else p->dev.hard_header_cache = NULL; #endif p->dev.header_cache_update = NULL; p->dev.flags = IFF_NOARP; } else { p->dev.hard_header = isdn_net_header; if (cfg->p_encap == ISDN_NET_ENCAP_ETHER) { #if (LINUX_VERSION_CODE < 0x02010F) p->dev.header_cache_bind = p->local.org_hcb; #else p->dev.hard_header_cache = p->local.org_hhc; #endif p->dev.header_cache_update = p->local.org_hcu; p->dev.flags = IFF_BROADCAST | IFF_MULTICAST; } else { #if (LINUX_VERSION_CODE < 0x02010F) p->dev.header_cache_bind = NULL; #else p->dev.hard_header_cache = NULL; #endif p->dev.header_cache_update = NULL; /* * paul: IFF_SOFTHEADERS was added in * 2.0.33?? Does this make sense? */ p->dev.flags = IFF_NOARP /* | IFF_SOFTHEADERS */; } } } p->local.p_encap = cfg->p_encap; return 0; } return -ENODEV; } /* * Perform get-interface-parameters.ioctl */ int isdn_net_getcfg(isdn_net_ioctl_cfg * cfg) { isdn_net_dev *p = isdn_net_findif(cfg->name); if (p) { strcpy(cfg->eaz, p->local.msn); cfg->exclusive = p->local.exclusive; if (p->local.pre_device >= 0) { sprintf(cfg->drvid, "%s,%d", dev->drvid[p->local.pre_device], p->local.pre_channel); } else cfg->drvid[0] = '\0'; cfg->onhtime = p->local.onhtime; cfg->charge = p->local.charge; cfg->l2_proto = p->local.l2_proto; cfg->l3_proto = p->local.l3_proto; cfg->p_encap = p->local.p_encap; cfg->secure = (p->local.flags & ISDN_NET_SECURE) ? 1 : 0; cfg->callback = 0; if (p->local.flags & ISDN_NET_CALLBACK) cfg->callback = 1; if (p->local.flags & ISDN_NET_CBOUT) cfg->callback = 2; cfg->cbhup = (p->local.flags & ISDN_NET_CBHUP) ? 1 : 0; cfg->dialmode = p->local.flags & ISDN_NET_DIALMODE_MASK; cfg->chargehup = (p->local.hupflags & 4) ? 1 : 0; cfg->ihup = (p->local.hupflags & 8) ? 1 : 0; cfg->cbdelay = p->local.cbdelay; cfg->dialmax = p->local.dialmax; cfg->triggercps = p->local.triggercps; cfg->slavedelay = p->local.slavedelay / HZ; cfg->chargeint = (p->local.hupflags & ISDN_CHARGEHUP) ? (p->local.chargeint / HZ) : 0; cfg->pppbind = p->local.pppbind; cfg->dialtimeout = p->local.dialtimeout >= 0 ? p->local.dialtimeout / HZ : -1; cfg->dialwait = p->local.dialwait / HZ; if (p->local.slave) strcpy(cfg->slave, ((isdn_net_local *) p->local.slave->priv)->name); else cfg->slave[0] = '\0'; if (p->local.master) strcpy(cfg->master, ((isdn_net_local *) p->local.master->priv)->name); else cfg->master[0] = '\0'; return 0; } return -ENODEV; } /* * Add a phone-number to an interface. */ int isdn_net_addphone(isdn_net_ioctl_phone * phone) { isdn_net_dev *p = isdn_net_findif(phone->name); isdn_net_phone *n; if (isdn_net_checkwild(phone->phone) && (phone->outgoing & 1)) return -EINVAL; if (p) { if (!(n = (isdn_net_phone *) kmalloc(sizeof(isdn_net_phone), GFP_KERNEL))) return -ENOMEM; strcpy(n->num, phone->phone); n->next = p->local.phone[phone->outgoing & 1]; p->local.phone[phone->outgoing & 1] = n; return 0; } return -ENODEV; } /* * Return a string of all phone-numbers of an interface. */ int isdn_net_getphones(isdn_net_ioctl_phone * phone, char *phones) { isdn_net_dev *p = isdn_net_findif(phone->name); int inout = phone->outgoing & 1; int more = 0; int count = 0; isdn_net_phone *n; int flags; int ret; if (!p) return -ENODEV; save_flags(flags); cli(); inout &= 1; for (n = p->local.phone[inout]; n; n = n->next) { if (more) { put_user(' ', phones++); count++; } if ((ret = copy_to_user(phones, n->num, strlen(n->num) + 1))) { restore_flags(flags); return ret; } phones += strlen(n->num); count += strlen(n->num); more = 1; } put_user(0, phones); count++; restore_flags(flags); return count; } /* * Delete a phone-number from an interface. */ int isdn_net_delphone(isdn_net_ioctl_phone * phone) { isdn_net_dev *p = isdn_net_findif(phone->name); int inout = phone->outgoing & 1; isdn_net_phone *n; isdn_net_phone *m; int flags; if (p) { save_flags(flags); cli(); n = p->local.phone[inout]; m = NULL; while (n) { if (!strcmp(n->num, phone->phone)) { if (p->local.dial == n) p->local.dial = n->next; if (m) m->next = n->next; else p->local.phone[inout] = n->next; kfree(n); restore_flags(flags); return 0; } m = n; n = (isdn_net_phone *) n->next; } restore_flags(flags); return -EINVAL; } return -ENODEV; } /* * Delete all phone-numbers of an interface. */ static int isdn_net_rmallphone(isdn_net_dev * p) { isdn_net_phone *n; isdn_net_phone *m; int flags; int i; save_flags(flags); cli(); for (i = 0; i < 2; i++) { n = p->local.phone[i]; while (n) { m = n->next; kfree(n); n = m; } p->local.phone[i] = NULL; } p->local.dial = NULL; restore_flags(flags); return 0; } /* * Force a hangup of a network-interface. */ int isdn_net_force_hangup(char *name) { isdn_net_dev *p = isdn_net_findif(name); struct device *q; if (p) { if (p->local.isdn_device < 0) return 1; q = p->local.slave; /* If this interface has slaves, do a hangup for them also. */ while (q) { isdn_net_hangup(q); q = (((isdn_net_local *) q->priv)->slave); } isdn_net_hangup(&p->dev); return 0; } return -ENODEV; } /* * Helper-function for isdn_net_rm: Do the real work. */ static int isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q) { int flags; save_flags(flags); cli(); if (p->local.master) { /* If it's a slave, it may be removed even if it is busy. However * it has to be hung up first. */ isdn_net_hangup(&p->dev); p->dev.start = 0; } if (p->dev.start) { restore_flags(flags); return -EBUSY; } /* Free all phone-entries */ isdn_net_rmallphone(p); /* If interface is bound exclusive, free channel-usage */ if (p->local.exclusive != -1) isdn_unexclusive_channel(p->local.pre_device, p->local.pre_channel); if (p->local.master) { /* It's a slave-device, so update master's slave-pointer if necessary */ if (((isdn_net_local *) (p->local.master->priv))->slave == &p->dev) ((isdn_net_local *) (p->local.master->priv))->slave = p->local.slave; } else /* Unregister only if it's a master-device */ unregister_netdev(&p->dev); /* Unlink device from chain */ if (q) q->next = p->next; else dev->netdev = p->next; if (p->local.slave) { /* If this interface has a slave, remove it also */ char *slavename = ((isdn_net_local *) (p->local.slave->priv))->name; isdn_net_dev *n = dev->netdev; q = NULL; while (n) { if (!strcmp(n->local.name, slavename)) { isdn_net_realrm(n, q); break; } q = n; n = (isdn_net_dev *) n->next; } } /* If no more net-devices remain, disable auto-hangup timer */ if (dev->netdev == NULL) isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0); restore_flags(flags); kfree(p); return 0; } /* * Remove a single network-interface. */ int isdn_net_rm(char *name) { isdn_net_dev *p; isdn_net_dev *q; /* Search name in netdev-chain */ p = dev->netdev; q = NULL; while (p) { if (!strcmp(p->local.name, name)) return (isdn_net_realrm(p, q)); q = p; p = (isdn_net_dev *) p->next; } /* If no more net-devices remain, disable auto-hangup timer */ if (dev->netdev == NULL) isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0); return -ENODEV; } /* * Remove all network-interfaces */ int isdn_net_rmall(void) { int flags; int ret; /* Walk through netdev-chain */ save_flags(flags); cli(); while (dev->netdev) { if (!dev->netdev->local.master) { /* Remove master-devices only, slaves get removed with their master */ if ((ret = isdn_net_realrm(dev->netdev, NULL))) { restore_flags(flags); return ret; } } } dev->netdev = NULL; restore_flags(flags); return 0; } /* * helper function to flush device queues * the better place would be net/core/dev.c */ static void dev_purge_queues(struct device *dev) { int i; for (i = 0; i < DEV_NUMBUFFS; i++) { struct sk_buff *skb; while ((skb = skb_dequeue(&dev->buffs[i]))) dev_kfree_skb(skb, FREE_WRITE); } }
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