/***************************************************************************** * sdla_ppp.c WANPIPE(tm) Multiprotocol WAN Link Driver. PPP module. * * Author: Jaspreet Singh * * Copyright: (c) 1995-1997 Sangoma Technologies Inc. * * 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 of the License, or (at your option) any later version. * ============================================================================ * Mar 15, 1998 Alan Cox o 2.1.8x basic port. * Nov 27, 1997 Jaspreet Singh o Added protection against enabling of irqs * while they have been disabled. * Nov 24, 1997 Jaspreet Singh o Fixed another RACE condition caused by * disabling and enabling of irqs. * o Added new counters for stats on disable/enable* IRQs. * Nov 10, 1997 Jaspreet Singh o Initialized 'skb->mac.raw' to 'skb->data' * before every netif_rx(). * o Free up the device structure in del_if(). * Nov 07, 1997 Jaspreet Singh o Changed the delay to zero for Line tracing * command. * Oct 20, 1997 Jaspreet Singh o Added hooks in for Router UP time. * Oct 16, 1997 Jaspreet Singh o The critical flag is used to maintain flow * control by avoiding RACE conditions. The * cli() and restore_flags() are taken out. * A new structure, "ppp_private_area", is added * to provide Driver Statistics. * Jul 21, 1997 Jaspreet Singh o Protected calls to sdla_peek() by adding * save_flags(), cli() and restore_flags(). * Jul 07, 1997 Jaspreet Singh o Added configurable TTL for UDP packets * o Added ability to discard mulitcast and * broacast source addressed packets. * Jun 27, 1997 Jaspreet Singh o Added FT1 monitor capabilities * New case (0x25) statement in if_send routine. * Added a global variable rCount to keep track * of FT1 status enabled on the board. * May 22, 1997 Jaspreet Singh o Added change in the PPP_SET_CONFIG command for * 508 card to reflect changes in the new * ppp508.sfm for supporting:continous transmission * of Configure-Request packets without receiving a * reply * OR-ed 0x300 to conf_flags * o Changed connect_tmout from 900 to 0 * May 21, 1997 Jaspreet Singh o Fixed UDP Management for multiple boards * Apr 25, 1997 Farhan Thawar o added UDP Management stuff * Mar 11, 1997 Farhan Thawar Version 3.1.1 * o fixed (+1) bug in rx_intr() * o changed if_send() to return 0 if * wandev.critical() is true * o free socket buffer in if_send() if * returning 0 * Jan 15, 1997 Gene Kozin Version 3.1.0 * o implemented exec() entry point * Jan 06, 1997 Gene Kozin Initial version. *****************************************************************************/ #include /* printk(), and other useful stuff */ #include /* offsetof(), etc. */ #include /* return codes */ #include /* inline memset(), etc. */ #include /* kmalloc(), kfree() */ #include /* WAN router definitions */ #include /* WANPIPE common user API definitions */ #include /* ARPHRD_* defines */ #include /* htons(), etc. */ #include /* copyto/from user */ #define _GNUC_ #include /* PPP firmware API definitions */ /****** Defines & Macros ****************************************************/ #ifdef _DEBUG_ #define STATIC #else #define STATIC static #endif #define PPP_DFLT_MTU 1500 /* default MTU */ #define PPP_MAX_MTU 4000 /* maximum MTU */ #define PPP_HDR_LEN 1 #define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */ #define HOLD_DOWN_TIME (30*HZ) /* link hold down time */ /* For handle_IPXWAN() */ #define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b))) /******Data Structures*****************************************************/ /* This structure is placed in the private data area of the device structure. * The card structure used to occupy the private area but now the following * structure will incorporate the card structure along with PPP specific data */ typedef struct ppp_private_area { sdla_t *card; unsigned long router_start_time; /*router start time in sec */ unsigned long tick_counter; /*used for 5 second counter */ unsigned mc; /*multicast support on or off */ /* PPP specific statistics */ unsigned long if_send_entry; unsigned long if_send_skb_null; unsigned long if_send_broadcast; unsigned long if_send_multicast; unsigned long if_send_critical_ISR; unsigned long if_send_critical_non_ISR; unsigned long if_send_busy; unsigned long if_send_busy_timeout; unsigned long if_send_DRVSTATS_request; unsigned long if_send_PTPIPE_request; unsigned long if_send_wan_disconnected; unsigned long if_send_adptr_bfrs_full; unsigned long if_send_protocol_error; unsigned long if_send_tx_int_enabled; unsigned long if_send_bfr_passed_to_adptr; unsigned long rx_intr_no_socket; unsigned long rx_intr_DRVSTATS_request; unsigned long rx_intr_PTPIPE_request; unsigned long rx_intr_bfr_not_passed_to_stack; unsigned long rx_intr_bfr_passed_to_stack; unsigned long UDP_PTPIPE_mgmt_kmalloc_err; unsigned long UDP_PTPIPE_mgmt_adptr_type_err; unsigned long UDP_PTPIPE_mgmt_direction_err; unsigned long UDP_PTPIPE_mgmt_adptr_cmnd_timeout; unsigned long UDP_PTPIPE_mgmt_adptr_cmnd_OK; unsigned long UDP_PTPIPE_mgmt_passed_to_adptr; unsigned long UDP_PTPIPE_mgmt_passed_to_stack; unsigned long UDP_PTPIPE_mgmt_no_socket; unsigned long UDP_DRVSTATS_mgmt_kmalloc_err; unsigned long UDP_DRVSTATS_mgmt_adptr_type_err; unsigned long UDP_DRVSTATS_mgmt_direction_err; unsigned long UDP_DRVSTATS_mgmt_adptr_cmnd_timeout; unsigned long UDP_DRVSTATS_mgmt_adptr_cmnd_OK; unsigned long UDP_DRVSTATS_mgmt_passed_to_adptr; unsigned long UDP_DRVSTATS_mgmt_passed_to_stack; unsigned long UDP_DRVSTATS_mgmt_no_socket; unsigned long router_up_time; } ppp_private_area_t; /* variable for keeping track of enabling/disabling FT1 monitor status */ static int rCount = 0; extern void disable_irq(unsigned int); extern void enable_irq(unsigned int); /****** Function Prototypes *************************************************/ /* WAN link driver entry points. These are called by the WAN router module. */ static int update(wan_device_t * wandev); static int new_if(wan_device_t * wandev, struct net_device *dev, wanif_conf_t * conf); static int del_if(wan_device_t * wandev, struct net_device *dev); /* WANPIPE-specific entry points */ static int wpp_exec(struct sdla *card, void *u_cmd, void *u_data); /* Network device interface */ static int if_init(struct net_device *dev); static int if_open(struct net_device *dev); static int if_close(struct net_device *dev); static int if_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len); static int if_rebuild_hdr(struct sk_buff *skb); static int if_send(struct sk_buff *skb, struct net_device *dev); static struct enet_statistics *if_stats(struct net_device *dev); /* PPP firmware interface functions */ static int ppp_read_version(sdla_t * card, char *str); static int ppp_configure(sdla_t * card, void *data); static int ppp_set_intr_mode(sdla_t * card, unsigned mode); static int ppp_comm_enable(sdla_t * card); static int ppp_comm_disable(sdla_t * card); static int ppp_get_err_stats(sdla_t * card); static int ppp_send(sdla_t * card, void *data, unsigned len, unsigned proto); static int ppp_error(sdla_t * card, int err, ppp_mbox_t * mb); /* Interrupt handlers */ STATIC void wpp_isr(sdla_t * card); static void rx_intr(sdla_t * card); static void tx_intr(sdla_t * card); /* Background polling routines */ static void wpp_poll(sdla_t * card); static void poll_active(sdla_t * card); static void poll_connecting(sdla_t * card); static void poll_disconnected(sdla_t * card); /* Miscellaneous functions */ static int config502(sdla_t * card); static int config508(sdla_t * card); static void show_disc_cause(sdla_t * card, unsigned cause); static unsigned char bps_to_speed_code(unsigned long bps); static int reply_udp(unsigned char *data, unsigned int mbox_len); static int process_udp_mgmt_pkt(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct net_device *dev, ppp_private_area_t * ppp_priv_area); static int process_udp_driver_call(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct net_device *dev, ppp_private_area_t * ppp_priv_area); static void init_ppp_tx_rx_buff(sdla_t * card); static int intr_test(sdla_t * card); static int udp_pkt_type(struct sk_buff *skb, sdla_t * card); static void init_ppp_priv_struct(ppp_private_area_t * ppp_priv_area); static void init_global_statistics(sdla_t * card); static int Intr_test_counter; static char TracingEnabled; static unsigned long curr_trace_addr; static unsigned long start_trace_addr; static unsigned short available_buffer_space; /* IPX functions */ static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming); static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto); /****** Public Functions ****************************************************/ /*============================================================================ * PPP protocol initialization routine. * * This routine is called by the main WANPIPE module during setup. At this * point adapter is completely initialized and firmware is running. * o read firmware version (to make sure it's alive) * o configure adapter * o initialize protocol-specific fields of the adapter data space. * * Return: 0 o.k. * < 0 failure. */ int wpp_init(sdla_t * card, wandev_conf_t * conf) { union { char str[80]; } u; /* Verify configuration ID */ if (conf->config_id != WANCONFIG_PPP) { printk(KERN_INFO "%s: invalid configuration ID %u!\n", card->devname, conf->config_id); return -EINVAL; } /* Initialize protocol-specific fields */ switch (card->hw.fwid) { case SFID_PPP502: card->mbox = (void *) (card->hw.dpmbase + PPP502_MB_OFFS); card->flags = (void *) (card->hw.dpmbase + PPP502_FLG_OFFS); break; case SFID_PPP508: card->mbox = (void *) (card->hw.dpmbase + PPP508_MB_OFFS); card->flags = (void *) (card->hw.dpmbase + PPP508_FLG_OFFS); break; default: return -EINVAL; } /* Read firmware version. Note that when adapter initializes, it * clears the mailbox, so it may appear that the first command was * executed successfully when in fact it was merely erased. To work * around this, we execute the first command twice. */ if (ppp_read_version(card, NULL) || ppp_read_version(card, u.str)) return -EIO; printk(KERN_INFO "%s: running PPP firmware v%s\n", card->devname, u.str); /* Adjust configuration and set defaults */ card->wandev.mtu = (conf->mtu) ? min(conf->mtu, PPP_MAX_MTU) : PPP_DFLT_MTU; card->wandev.bps = conf->bps; card->wandev.interface = conf->interface; card->wandev.clocking = conf->clocking; card->wandev.station = conf->station; card->isr = &wpp_isr; card->poll = &wpp_poll; card->exec = &wpp_exec; card->wandev.update = &update; card->wandev.new_if = &new_if; card->wandev.del_if = &del_if; card->wandev.state = WAN_DISCONNECTED; card->wandev.udp_port = conf->udp_port; card->wandev.ttl = conf->ttl; card->irq_dis_if_send_count = 0; card->irq_dis_poll_count = 0; TracingEnabled = 0; card->wandev.enable_IPX = conf->enable_IPX; if (conf->network_number) card->wandev.network_number = conf->network_number; else card->wandev.network_number = 0xDEADBEEF; /* initialize global statistics */ init_global_statistics(card); return 0; } /******* WAN Device Driver Entry Points *************************************/ /*============================================================================ * Update device status & statistics. */ static int update(wan_device_t * wandev) { sdla_t *card; /* sanity checks */ if ((wandev == NULL) || (wandev->private == NULL)) return -EFAULT; if (wandev->state == WAN_UNCONFIGURED) return -ENODEV; if (test_and_set_bit(0, (void *) &wandev->critical)) return -EAGAIN; card = wandev->private; ppp_get_err_stats(card); wandev->critical = 0; return 0; } /*============================================================================ * Create new logical channel. * This routine is called by the router when ROUTER_IFNEW IOCTL is being * handled. * o parse media- and hardware-specific configuration * o make sure that a new channel can be created * o allocate resources, if necessary * o prepare network device structure for registaration. * * Return: 0 o.k. * < 0 failure (channel will not be created) */ static int new_if(wan_device_t * wandev, struct net_device *dev, wanif_conf_t * conf) { sdla_t *card = wandev->private; ppp_private_area_t *ppp_priv_area; if (wandev->ndev) return -EEXIST; if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) { printk(KERN_INFO "%s: invalid interface name!\n", card->devname); return -EINVAL; } /* allocate and initialize private data */ ppp_priv_area = kmalloc(sizeof(ppp_private_area_t), GFP_KERNEL); if (ppp_priv_area == NULL) return -ENOMEM; memset(ppp_priv_area, 0, sizeof(ppp_private_area_t)); ppp_priv_area->card = card; /* initialize data */ strcpy(card->u.p.if_name, conf->name); /* initialize data in ppp_private_area structure */ init_ppp_priv_struct(ppp_priv_area); ppp_priv_area->mc = conf->mc; /* prepare network device data space for registration */ dev->name = card->u.p.if_name; dev->init = &if_init; dev->priv = ppp_priv_area; return 0; } /*============================================================================ * Delete logical channel. */ static int del_if(wan_device_t * wandev, struct net_device *dev) { if (dev->priv) { kfree(dev->priv); dev->priv = NULL; } return 0; } /****** WANPIPE-specific entry points ***************************************/ /*============================================================================ * Execute adapter interface command. */ static int wpp_exec(struct sdla *card, void *u_cmd, void *u_data) { ppp_mbox_t *mbox = card->mbox; int len; if(copy_from_user((void *) &mbox->cmd, u_cmd, sizeof(ppp_cmd_t))) return -EFAULT; len = mbox->cmd.length; if (len) { if(copy_from_user((void *) &mbox->data, u_data, len)) return -EFAULT; } /* execute command */ if (!sdla_exec(mbox)) return -EIO; /* return result */ if(copy_to_user(u_cmd, (void *) &mbox->cmd, sizeof(ppp_cmd_t))) return -EFAULT; len = mbox->cmd.length; if (len && u_data && copy_to_user(u_data, (void *) &mbox->data, len)) return -EFAULT; return 0; } /****** Network Device Interface ********************************************/ /*============================================================================ * Initialize Linux network interface. * * This routine is called only once for each interface, during Linux network * interface registration. Returning anything but zero will fail interface * registration. */ static int if_init(struct net_device *dev) { ppp_private_area_t *ppp_priv_area = dev->priv; sdla_t *card = ppp_priv_area->card; wan_device_t *wandev = &card->wandev; /* Initialize device driver entry points */ dev->open = &if_open; dev->stop = &if_close; dev->hard_header = &if_header; dev->rebuild_header = &if_rebuild_hdr; dev->hard_start_xmit = &if_send; dev->get_stats = &if_stats; /* Initialize media-specific parameters */ dev->type = ARPHRD_PPP; /* ARP h/w type */ dev->mtu = wandev->mtu; dev->hard_header_len = PPP_HDR_LEN; /* media header length */ /* Initialize hardware parameters (just for reference) */ dev->irq = wandev->irq; dev->dma = wandev->dma; dev->base_addr = wandev->ioport; dev->mem_start = (unsigned long)wandev->maddr; dev->mem_end = dev->mem_start + wandev->msize - 1; /* Set transmit buffer queue length */ dev->tx_queue_len = 100; /* Initialize socket buffers */ dev_init_buffers(dev); return 0; } /*============================================================================ * Open network interface. * o enable communications and interrupts. * o prevent module from unloading by incrementing use count * * Return 0 if O.k. or errno. */ static int if_open(struct net_device *dev) { ppp_private_area_t *ppp_priv_area = dev->priv; sdla_t *card = ppp_priv_area->card; ppp_flags_t *flags = card->flags; struct timeval tv; int err = 0; if (dev->start) return -EBUSY; /* only one open is allowed */ if (test_and_set_bit(0, (void *) &card->wandev.critical)) return -EAGAIN; if ((card->hw.fwid == SFID_PPP502) ? config502(card) : config508(card)) { err = -EIO; card->wandev.critical = 0; return err; } Intr_test_counter = 0; err = intr_test(card); if ((err) || (Intr_test_counter != (MAX_INTR_TEST_COUNTER + 1))) { printk(KERN_INFO "%s: Interrupt Test Failed, Counter: %i\n", card->devname, Intr_test_counter); err = -EIO; card->wandev.critical = 0; return err; } printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n", card->devname, Intr_test_counter); /* Initialize Rx/Tx buffer control fields */ init_ppp_tx_rx_buff(card); if (ppp_set_intr_mode(card, 0x03)) { err = -EIO; card->wandev.critical = 0; return err; } flags->imask &= ~0x02; if (ppp_comm_enable(card)) { err = -EIO; card->wandev.critical = 0; return err; } wanpipe_set_state(card, WAN_CONNECTING); wanpipe_open(card); dev->mtu = min(dev->mtu, card->wandev.mtu); dev->interrupt = 0; dev->tbusy = 0; dev->start = 1; do_gettimeofday(&tv); ppp_priv_area->router_start_time = tv.tv_sec; card->wandev.critical = 0; return err; } /*============================================================================ * Close network interface. * o if this is the last open, then disable communications and interrupts. * o reset flags. */ static int if_close(struct net_device *dev) { ppp_private_area_t *ppp_priv_area = dev->priv; sdla_t *card = ppp_priv_area->card; if (test_and_set_bit(0, (void *) &card->wandev.critical)) return -EAGAIN; dev->start = 0; wanpipe_close(card); wanpipe_set_state(card, WAN_DISCONNECTED); ppp_set_intr_mode(card, 0); ppp_comm_disable(card); card->wandev.critical = 0; return 0; } /*============================================================================ * Build media header. * * The trick here is to put packet type (Ethertype) into 'protocol' field of * the socket buffer, so that we don't forget it. If packet type is not * supported, set skb->protocol to 0 and discard packet later. * * Return: media header length. */ static int if_header(struct sk_buff *skb, struct net_device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) { switch (type) { case ETH_P_IP: case ETH_P_IPX: skb->protocol = type; break; default: skb->protocol = 0; } return PPP_HDR_LEN; } /*============================================================================ * Re-build media header. * * Return: 1 physical address resolved. * 0 physical address not resolved */ static int if_rebuild_hdr(struct sk_buff *skb) { struct net_device *dev=skb->dev; ppp_private_area_t *ppp_priv_area = dev->priv; sdla_t *card = ppp_priv_area->card; printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n", card->devname, dev->name); return 1; } /*============================================================================ * Send a packet on a network interface. * o set tbusy flag (marks start of the transmission) to block a timer-based * transmit from overlapping. * o check link state. If link is not up, then drop the packet. * o execute adapter send command. * o free socket buffer * * Return: 0 complete (socket buffer must be freed) * non-0 packet may be re-transmitted (tbusy must be set) * * Notes: * 1. This routine is called either by the protocol stack or by the "net * bottom half" (with interrupts enabled). * 2. Setting tbusy flag will inhibit further transmit requests from the * protocol stack and can be used for flow control with protocol layer. */ static int if_send(struct sk_buff *skb, struct net_device *dev) { ppp_private_area_t *ppp_priv_area = dev->priv; sdla_t *card = ppp_priv_area->card; unsigned char *sendpacket; unsigned long check_braddr, check_mcaddr; unsigned long host_cpu_flags; ppp_flags_t *flags = card->flags; int retry = 0; int err, udp_type; ++ppp_priv_area->if_send_entry; if (skb == NULL) { /* If we get here, some higher layer thinks we've missed an * tx-done interrupt. */ printk(KERN_INFO "%s: interface %s got kicked!\n", card->devname, dev->name); ++ppp_priv_area->if_send_skb_null; mark_bh(NET_BH); return 0; } if (dev->tbusy) { /* If our device stays busy for at least 5 seconds then we will * kick start the device by making dev->tbusy = 0. We expect * that our device never stays busy more than 5 seconds. So this * is only used as a last resort. */ ++ppp_priv_area->if_send_busy; ++card->wandev.stats.collisions; if ((jiffies - ppp_priv_area->tick_counter) < (5 * HZ)) { return 1; } printk(KERN_INFO "%s: Transmit times out\n", card->devname); ++ppp_priv_area->if_send_busy_timeout; /* unbusy the card (because only one interface per card) */ dev->tbusy = 0; } sendpacket = skb->data; udp_type = udp_pkt_type(skb, card); if (udp_type == UDP_DRVSTATS_TYPE) { ++ppp_priv_area->if_send_DRVSTATS_request; process_udp_driver_call(UDP_PKT_FRM_STACK, card, skb, dev, ppp_priv_area); dev_kfree_skb(skb); return 0; } else if (udp_type == UDP_PTPIPE_TYPE) ++ppp_priv_area->if_send_PTPIPE_request; /* retreive source address in two forms: broadcast & multicast */ check_braddr = sendpacket[15]; check_mcaddr = sendpacket[12]; check_braddr = check_braddr << 8; check_mcaddr = check_mcaddr << 8; check_braddr |= sendpacket[14]; check_mcaddr |= sendpacket[13]; check_braddr = check_braddr << 8; check_mcaddr = check_mcaddr << 8; check_braddr |= sendpacket[13]; check_mcaddr |= sendpacket[14]; check_braddr = check_braddr << 8; check_mcaddr = check_mcaddr << 8; check_braddr |= sendpacket[12]; check_mcaddr |= sendpacket[15]; /* if the Source Address is a Multicast address */ if ((ppp_priv_area->mc == WANOPT_NO) && (check_mcaddr >= 0xE0000001) && (check_mcaddr <= 0xFFFFFFFE)) { printk(KERN_INFO "%s: Mutlicast Src. Addr. silently discarded\n" ,card->devname); dev_kfree_skb(skb); ++ppp_priv_area->if_send_multicast; ++card->wandev.stats.tx_dropped; return 0; } disable_irq(card->hw.irq); ++card->irq_dis_if_send_count; if (test_and_set_bit(0, (void *) &card->wandev.critical)) { if (card->wandev.critical == CRITICAL_IN_ISR) { /* If the critical flag is set due to an Interrupt * then set enable transmit interrupt flag to enable * transmit interrupt. (delay interrupt) */ card->wandev.enable_tx_int = 1; dev->tbusy = 1; /* set the counter to see if we get the interrupt in * 5 seconds. */ ppp_priv_area->tick_counter = jiffies; ++ppp_priv_area->if_send_critical_ISR; save_flags(host_cpu_flags); cli(); if ((!(--card->irq_dis_if_send_count)) && (!card->irq_dis_poll_count)) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return 1; } dev_kfree_skb(skb); ++ppp_priv_area->if_send_critical_non_ISR; save_flags(host_cpu_flags); cli(); if ((!(--card->irq_dis_if_send_count)) && (!card->irq_dis_poll_count)) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return 0; } if (udp_type == UDP_PTPIPE_TYPE) { err = process_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev, ppp_priv_area); } else if (card->wandev.state != WAN_CONNECTED) { ++ppp_priv_area->if_send_wan_disconnected; ++card->wandev.stats.tx_dropped; } else if (!skb->protocol) { ++ppp_priv_area->if_send_protocol_error; ++card->wandev.stats.tx_errors; } else { /*If it's IPX change the network numbers to 0 if they're ours. */ if (skb->protocol == ETH_P_IPX) { if (card->wandev.enable_IPX) { switch_net_numbers(skb->data, card->wandev.network_number, 0); } else { ++card->wandev.stats.tx_dropped; goto tx_done; } } if (ppp_send(card, skb->data, skb->len, skb->protocol)) { retry = 1; dev->tbusy = 1; ++ppp_priv_area->if_send_adptr_bfrs_full; ++ppp_priv_area->if_send_tx_int_enabled; ppp_priv_area->tick_counter = jiffies; ++card->wandev.stats.tx_errors; flags->imask |= 0x02; /* unmask Tx interrupts */ } else { ++ppp_priv_area->if_send_bfr_passed_to_adptr; ++card->wandev.stats.tx_packets; card->wandev.stats.tx_bytes += skb->len; } } tx_done: if (!retry) { dev_kfree_skb(skb); } card->wandev.critical = 0; save_flags(host_cpu_flags); cli(); if ((!(--card->irq_dis_if_send_count)) && (!card->irq_dis_poll_count)) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return retry; } /*============================================================================ * Reply to UDP Management system. * Return length of reply. */ static int reply_udp(unsigned char *data, unsigned int mbox_len) { unsigned short len, udp_length, temp, i, ip_length; unsigned long sum; /* Set length of packet */ len = mbox_len + 60; /* fill in UDP reply */ data[36] = 0x02; /* fill in UDP length */ udp_length = mbox_len + 40; /* put it on an even boundary */ if (udp_length & 0x0001) { udp_length += 1; len += 1; } temp = (udp_length << 8) | (udp_length >> 8); memcpy(&data[24], &temp, 2); /* swap UDP ports */ memcpy(&temp, &data[20], 2); memcpy(&data[20], &data[22], 2); memcpy(&data[22], &temp, 2); /* add UDP pseudo header */ temp = 0x1100; memcpy(&data[udp_length + 20], &temp, 2); temp = (udp_length << 8) | (udp_length >> 8); memcpy(&data[udp_length + 22], &temp, 2); /* calculate UDP checksum */ data[26] = data[27] = 0; sum = 0; for (i = 0; i < udp_length + 12; i += 2) { memcpy(&temp, &data[12 + i], 2); sum += (unsigned long) temp; } while (sum >> 16) { sum = (sum & 0xffffUL) + (sum >> 16); } temp = (unsigned short) sum; temp = ~temp; if (temp == 0) temp = 0xffff; memcpy(&data[26], &temp, 2); /* fill in IP length */ ip_length = udp_length + 20; temp = (ip_length << 8) | (ip_length >> 8); memcpy(&data[2], &temp, 2); /* swap IP addresses */ memcpy(&temp, &data[12], 2); memcpy(&data[12], &data[16], 2); memcpy(&data[16], &temp, 2); memcpy(&temp, &data[14], 2); memcpy(&data[14], &data[18], 2); memcpy(&data[18], &temp, 2); /* fill in IP checksum */ data[10] = data[11] = 0; sum = 0; for (i = 0; i < 20; i += 2) { memcpy(&temp, &data[i], 2); sum += (unsigned long) temp; } while (sum >> 16) { sum = (sum & 0xffffUL) + (sum >> 16); } temp = (unsigned short) sum; temp = ~temp; if (temp == 0) temp = 0xffff; memcpy(&data[10], &temp, 2); return len; } /* reply_udp */ /* If incoming is 0 (outgoing)- if the net numbers is ours make it 0 if incoming is 1 - if the net number is 0 make it ours */ static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming) { unsigned long pnetwork_number; pnetwork_number = (unsigned long) ((sendpacket[6] << 24) + (sendpacket[7] << 16) + (sendpacket[8] << 8) + sendpacket[9]); if (!incoming) { /* If the destination network number is ours, make it 0 */ if (pnetwork_number == network_number) { sendpacket[6] = sendpacket[7] = sendpacket[8] = sendpacket[9] = 0x00; } } else { /* If the incoming network is 0, make it ours */ if (pnetwork_number == 0) { sendpacket[6] = (unsigned char) (network_number >> 24); sendpacket[7] = (unsigned char) ((network_number & 0x00FF0000) >> 16); sendpacket[8] = (unsigned char) ((network_number & 0x0000FF00) >> 8); sendpacket[9] = (unsigned char) (network_number & 0x000000FF); } } pnetwork_number = (unsigned long) ((sendpacket[18] << 24) + (sendpacket[19] << 16) + (sendpacket[20] << 8) + sendpacket[21]); if (!incoming) { /* If the source network is ours, make it 0 */ if (pnetwork_number == network_number) { sendpacket[18] = sendpacket[19] = sendpacket[20] = sendpacket[21] = 0x00; } } else { /* If the source network is 0, make it ours */ if (pnetwork_number == 0) { sendpacket[18] = (unsigned char) (network_number >> 24); sendpacket[19] = (unsigned char) ((network_number & 0x00FF0000) >> 16); sendpacket[20] = (unsigned char) ((network_number & 0x0000FF00) >> 8); sendpacket[21] = (unsigned char) (network_number & 0x000000FF); } } } /* switch_net_numbers */ /*============================================================================ * Get Ethernet-style interface statistics. * Return a pointer to struct enet_statistics. */ static struct enet_statistics *if_stats(struct net_device *dev) { ppp_private_area_t *ppp_priv_area = dev->priv; sdla_t *card; /* * Device is down:No statistics */ if(ppp_priv_area==NULL) return NULL; card = ppp_priv_area->card; return &card->wandev.stats; } /****** PPP Firmware Interface Functions ************************************/ /*============================================================================ * Read firmware code version. * Put code version as ASCII string in str. */ static int ppp_read_version(sdla_t * card, char *str) { ppp_mbox_t *mb = card->mbox; int err; memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); mb->cmd.command = PPP_READ_CODE_VERSION; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) ppp_error(card, err, mb); else if (str) { int len = mb->cmd.length; memcpy(str, mb->data, len); str[len] = '\0'; } return err; } /*============================================================================ * Configure PPP firmware. */ static int ppp_configure(sdla_t * card, void *data) { ppp_mbox_t *mb = card->mbox; int data_len = (card->hw.fwid == SFID_PPP502) ? sizeof(ppp502_conf_t) : sizeof(ppp508_conf_t); int err; memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); memcpy(mb->data, data, data_len); mb->cmd.length = data_len; mb->cmd.command = PPP_SET_CONFIG; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) ppp_error(card, err, mb); return err; } /*============================================================================ * Set interrupt mode. */ static int ppp_set_intr_mode(sdla_t * card, unsigned mode) { ppp_mbox_t *mb = card->mbox; int err; memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); mb->data[0] = mode; switch (card->hw.fwid) { case SFID_PPP502: mb->cmd.length = 1; break; case SFID_PPP508: default: mb->data[1] = card->hw.irq; mb->cmd.length = 2; } mb->cmd.command = PPP_SET_INTR_FLAGS; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) ppp_error(card, err, mb); return err; } /*============================================================================ * Enable communications. */ static int ppp_comm_enable(sdla_t * card) { ppp_mbox_t *mb = card->mbox; int err; memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); mb->cmd.command = PPP_COMM_ENABLE; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) ppp_error(card, err, mb); return err; } /*============================================================================ * Disable communications. */ static int ppp_comm_disable(sdla_t * card) { ppp_mbox_t *mb = card->mbox; int err; memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); mb->cmd.command = PPP_COMM_DISABLE; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) ppp_error(card, err, mb); return err; } /*============================================================================ * Get communications error statistics. */ static int ppp_get_err_stats(sdla_t * card) { ppp_mbox_t *mb = card->mbox; int err; memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); mb->cmd.command = PPP_READ_ERROR_STATS; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err == CMD_OK) { ppp_err_stats_t *stats = (void *) mb->data; card->wandev.stats.rx_over_errors = stats->rx_overrun; card->wandev.stats.rx_crc_errors = stats->rx_bad_crc; card->wandev.stats.rx_missed_errors = stats->rx_abort; card->wandev.stats.rx_length_errors = stats->rx_lost; card->wandev.stats.tx_aborted_errors = stats->tx_abort; } else ppp_error(card, err, mb); return err; } /*============================================================================ * Send packet. * Return: 0 - o.k. * 1 - no transmit buffers available */ static int ppp_send(sdla_t * card, void *data, unsigned len, unsigned proto) { ppp_buf_ctl_t *txbuf = card->u.p.txbuf; unsigned long addr; if (txbuf->flag) return 1 ; if (card->hw.fwid == SFID_PPP502) addr = (txbuf->buf.o_p[1] << 8) + txbuf->buf.o_p[0]; else addr = txbuf->buf.ptr; sdla_poke(&card->hw, addr, data, len); txbuf->length = len; /* frame length */ if (proto == ETH_P_IPX) txbuf->proto = 0x01; /* protocol ID */ txbuf->flag = 1; /* start transmission */ /* Update transmit buffer control fields */ card->u.p.txbuf = ++txbuf; if ((void *) txbuf > card->u.p.txbuf_last) card->u.p.txbuf = card->u.p.txbuf_base; return 0; } /****** Firmware Error Handler **********************************************/ /*============================================================================ * Firmware error handler. * This routine is called whenever firmware command returns non-zero * return code. * * Return zero if previous command has to be cancelled. */ static int ppp_error(sdla_t * card, int err, ppp_mbox_t * mb) { unsigned cmd = mb->cmd.command; switch (err) { case CMD_TIMEOUT: printk(KERN_ERR "%s: command 0x%02X timed out!\n", card->devname, cmd); break; default: printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n" ,card->devname, cmd, err); } return 0; } /****** Interrupt Handlers **************************************************/ /*============================================================================ * PPP interrupt service routine. */ STATIC void wpp_isr(sdla_t * card) { ppp_flags_t *flags = card->flags; char *ptr = &flags->iflag; unsigned long host_cpu_flags; struct net_device *dev = card->wandev.dev; int i; card->in_isr = 1; ++card->statistics.isr_entry; if (test_and_set_bit(0, (void *) &card->wandev.critical)) { ++card->statistics.isr_already_critical; printk(KERN_INFO "%s: Critical while in ISR!\n", card->devname); card->in_isr = 0; return; } /* For all interrupts set the critical flag to CRITICAL_IN_ISR. * If the if_send routine is called with this flag set it will set * the enable transmit flag to 1. (for a delayed interrupt) */ card->wandev.critical = CRITICAL_IN_ISR; card->buff_int_mode_unbusy = 0; switch (flags->iflag) { case 0x01: /* receive interrupt */ ++card->statistics.isr_rx; rx_intr(card); break; case 0x02: /* transmit interrupt */ ++card->statistics.isr_tx; flags->imask &= ~0x02; dev->tbusy = 0; card->buff_int_mode_unbusy = 1; break; case 0x08: ++Intr_test_counter; ++card->statistics.isr_intr_test; break; default: /* unexpected interrupt */ ++card->statistics.isr_spurious; printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n", card->devname, flags->iflag); printk(KERN_INFO "%s: ID Bytes = ", card->devname); for (i = 0; i < 8; i++) printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i)); printk(KERN_INFO "\n"); } /* The critical flag is set to CRITICAL_INTR_HANDLED to let the * if_send call know that the interrupt is handled so that * transmit interrupts are not enabled again. */ card->wandev.critical = CRITICAL_INTR_HANDLED; /* If the enable transmit interrupt flag is set then enable transmit * interrupt on the board. This only goes through if if_send is called * and the critical flag is set due to an Interrupt. */ if (card->wandev.enable_tx_int) { flags->imask |= 0x02; card->wandev.enable_tx_int = 0; ++card->statistics.isr_enable_tx_int; } save_flags(host_cpu_flags); cli(); card->in_isr = 0; flags->iflag = 0; card->wandev.critical = 0; restore_flags(host_cpu_flags); if (card->buff_int_mode_unbusy) mark_bh(NET_BH); } /*============================================================================ * Receive interrupt handler. */ static void rx_intr(sdla_t * card) { ppp_buf_ctl_t *rxbuf = card->rxmb; struct net_device *dev = card->wandev.dev; ppp_private_area_t *ppp_priv_area; struct sk_buff *skb; unsigned len; void *buf; int i, err; ppp_flags_t *flags = card->flags; char *ptr = &flags->iflag; int udp_type; if (rxbuf->flag != 0x01) { printk(KERN_INFO "%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n", card->devname, (unsigned) rxbuf, rxbuf->flag); printk(KERN_INFO "%s: ID Bytes = ", card->devname); for (i = 0; i < 8; i++) printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i)); printk(KERN_INFO "\n"); ++card->statistics.rx_intr_corrupt_rx_bfr; return; } if (dev && dev->start) { len = rxbuf->length; ppp_priv_area = dev->priv; /* Allocate socket buffer */ skb = dev_alloc_skb(len); if (skb != NULL) { /* Copy data to the socket buffer */ if (card->hw.fwid == SFID_PPP502) { unsigned addr = (rxbuf->buf.o_p[1] << 8) + rxbuf->buf.o_p[0]; buf = skb_put(skb, len); sdla_peek(&card->hw, addr, buf, len); } else { unsigned addr = rxbuf->buf.ptr; if ((addr + len) > card->u.p.rx_top + 1) { unsigned tmp = card->u.p.rx_top - addr + 1; buf = skb_put(skb, tmp); sdla_peek(&card->hw, addr, buf, tmp); addr = card->u.p.rx_base; len -= tmp; } buf = skb_put(skb, len); sdla_peek(&card->hw, addr, buf, len); } /* Decapsulate packet */ switch (rxbuf->proto) { case 0x00: skb->protocol = htons(ETH_P_IP); break; case 0x01: skb->protocol = htons(ETH_P_IPX); break; } udp_type = udp_pkt_type(skb, card); if (udp_type == UDP_DRVSTATS_TYPE) { ++ppp_priv_area->rx_intr_DRVSTATS_request; process_udp_driver_call( UDP_PKT_FRM_NETWORK, card, skb, dev, ppp_priv_area); dev_kfree_skb(skb); } else if (udp_type == UDP_PTPIPE_TYPE) { ++ppp_priv_area->rx_intr_PTPIPE_request; err = process_udp_mgmt_pkt( UDP_PKT_FRM_NETWORK, card, skb, dev, ppp_priv_area); dev_kfree_skb(skb); } else if (handle_IPXWAN(skb->data, card->devname, card->wandev.enable_IPX, card->wandev.network_number, skb->protocol)) { if (card->wandev.enable_IPX) { ppp_send(card, skb->data, skb->len, ETH_P_IPX); dev_kfree_skb(skb); } else { ++card->wandev.stats.rx_dropped; } } else { /* Pass it up the protocol stack */ skb->dev = dev; skb->mac.raw = skb->data; netif_rx(skb); ++card->wandev.stats.rx_packets; card->wandev.stats.rx_bytes += skb->len; ++ppp_priv_area->rx_intr_bfr_passed_to_stack; } } else { printk(KERN_INFO "%s: no socket buffers available!\n", card->devname); ++card->wandev.stats.rx_dropped; ++ppp_priv_area->rx_intr_no_socket; } } else ++card->statistics.rx_intr_dev_not_started; /* Release buffer element and calculate a pointer to the next one */ rxbuf->flag = (card->hw.fwid == SFID_PPP502) ? 0xFF : 0x00; card->rxmb = ++rxbuf; if ((void *) rxbuf > card->u.p.rxbuf_last) card->rxmb = card->u.p.rxbuf_base; } /*============================================================================ * Transmit interrupt handler. */ static void tx_intr(sdla_t * card) { struct net_device *dev = card->wandev.dev; if (!dev || !dev->start) { ++card->statistics.tx_intr_dev_not_started; return; } dev->tbusy = 0; mark_bh(NET_BH); } static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto) { int i; if (proto == htons(ETH_P_IPX)) { /* It's an IPX packet */ if (!enable_IPX) { /* Return 1 so we don't pass it up the stack. */ return 1; } } else { /* It's not IPX so pass it up the stack. */ return 0; } if (sendpacket[16] == 0x90 && sendpacket[17] == 0x04) { /* It's IPXWAN */ if (sendpacket[2] == 0x02 && sendpacket[34] == 0x00) { /* It's a timer request packet */ printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n", devname); /* Go through the routing options and answer no to every */ /* option except Unnumbered RIP/SAP */ for (i = 41; sendpacket[i] == 0x00; i += 5) { /* 0x02 is the option for Unnumbered RIP/SAP */ if (sendpacket[i + 4] != 0x02) { sendpacket[i + 1] = 0; } } /* Skip over the extended Node ID option */ if (sendpacket[i] == 0x04) { i += 8; } /* We also want to turn off all header compression opt. */ for (; sendpacket[i] == 0x80;) { sendpacket[i + 1] = 0; i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4; } /* Set the packet type to timer response */ sendpacket[34] = 0x01; printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n", devname); } else if (sendpacket[34] == 0x02) { /* This is an information request packet */ printk(KERN_INFO "%s: Received IPXWAN Information Request packet\n", devname); /* Set the packet type to information response */ sendpacket[34] = 0x03; /* Set the router name */ sendpacket[51] = 'P'; sendpacket[52] = 'T'; sendpacket[53] = 'P'; sendpacket[54] = 'I'; sendpacket[55] = 'P'; sendpacket[56] = 'E'; sendpacket[57] = '-'; sendpacket[58] = CVHexToAscii(network_number >> 28); sendpacket[59] = CVHexToAscii((network_number & 0x0F000000) >> 24); sendpacket[60] = CVHexToAscii((network_number & 0x00F00000) >> 20); sendpacket[61] = CVHexToAscii((network_number & 0x000F0000) >> 16); sendpacket[62] = CVHexToAscii((network_number & 0x0000F000) >> 12); sendpacket[63] = CVHexToAscii((network_number & 0x00000F00) >> 8); sendpacket[64] = CVHexToAscii((network_number & 0x000000F0) >> 4); sendpacket[65] = CVHexToAscii(network_number & 0x0000000F); for (i = 66; i < 99; i += 1) sendpacket[i] = 0; printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n", devname); } else { printk(KERN_INFO "%s: Unknown IPXWAN packet!\n", devname); return 0; } /* Set the WNodeID to our network address */ sendpacket[35] = (unsigned char) (network_number >> 24); sendpacket[36] = (unsigned char) ((network_number & 0x00FF0000) >> 16); sendpacket[37] = (unsigned char) ((network_number & 0x0000FF00) >> 8); sendpacket[38] = (unsigned char) (network_number & 0x000000FF); return 1; } else { /* If we get here's its an IPX-data packet, so it'll get passed up the stack. */ /* switch the network numbers */ switch_net_numbers(sendpacket, network_number, 1); return 0; } } /****** Background Polling Routines ****************************************/ /*============================================================================ * Main polling routine. * This routine is repeatedly called by the WANPIPE 'thread' to allow for * time-dependent housekeeping work. * * Notes: * 1. This routine may be called on interrupt context with all interrupts * enabled. Beware! */ static void wpp_poll(sdla_t * card) { struct net_device *dev = card->wandev.dev; ppp_flags_t *adptr_flags = card->flags; unsigned long host_cpu_flags; ++card->statistics.poll_entry; /* The wpp_poll is called continously by the WANPIPE thread to allow * for line state housekeeping. However if we are in a connected state * then we do not need to go through all the checks everytime. When in * connected state execute wpp_poll once every second. */ if (card->wandev.state == WAN_CONNECTED) { if ((jiffies - card->state_tick) < HZ) return; } disable_irq(card->hw.irq); ++card->irq_dis_poll_count; if (test_and_set_bit(0, (void *) &card->wandev.critical)) { ++card->statistics.poll_already_critical; printk(KERN_INFO "%s: critical inside wpp_poll\n", card->devname); save_flags(host_cpu_flags); cli(); if ((!card->irq_dis_if_send_count) && (!(--card->irq_dis_poll_count))) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return; } ++card->statistics.poll_processed; if (dev && dev->tbusy && !(adptr_flags->imask & 0x02)) { ++card->statistics.poll_tbusy_bad_status; printk(KERN_INFO "%s: Wpp_Poll: tbusy = 0x01, imask = 0x%02X\n" ,card->devname, adptr_flags->imask); } switch (card->wandev.state) { case WAN_CONNECTED: card->state_tick = jiffies; poll_active(card); break; case WAN_CONNECTING: poll_connecting(card); break; case WAN_DISCONNECTED: poll_disconnected(card); break; default: printk(KERN_INFO "%s: Unknown Poll State 0x%02X\n", card->devname, card->wandev.state); break; } card->wandev.critical = 0; save_flags(host_cpu_flags); cli(); if ((!card->irq_dis_if_send_count) && (!(--card->irq_dis_poll_count))) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); } /*============================================================================ * Monitor active link phase. */ static void poll_active(sdla_t * card) { ppp_flags_t *flags = card->flags; /* We check the lcp_state to see if we are in DISCONNECTED state. * We are considered to be connected for lcp states 0x06, 0x07, 0x08 * and 0x09. */ if ((flags->lcp_state <= 0x05) || (flags->disc_cause & 0x03)) { wanpipe_set_state(card, WAN_DISCONNECTED); show_disc_cause(card, flags->disc_cause); } } /*============================================================================ * Monitor link establishment phase. * o if connection timed out, disconnect the link. */ static void poll_connecting(sdla_t * card) { ppp_flags_t *flags = card->flags; if (flags->lcp_state == 0x09) { wanpipe_set_state(card, WAN_CONNECTED); } else if (flags->disc_cause & 0x03) { wanpipe_set_state(card, WAN_DISCONNECTED); show_disc_cause(card, flags->disc_cause); } } /*============================================================================ * Monitor physical link disconnected phase. * o if interface is up and the hold-down timeout has expired, then retry * connection. */ static void poll_disconnected(sdla_t * card) { struct net_device *dev = card->wandev.dev; if (dev && dev->start && ((jiffies - card->state_tick) > HOLD_DOWN_TIME)) { wanpipe_set_state(card, WAN_CONNECTING); if (ppp_comm_enable(card) == CMD_OK) init_ppp_tx_rx_buff(card); } } /****** Miscellaneous Functions *********************************************/ /*============================================================================ * Configure S502 adapter. */ static int config502(sdla_t * card) { ppp502_conf_t cfg; /* Prepare PPP configuration structure */ memset(&cfg, 0, sizeof(ppp502_conf_t)); if (card->wandev.clocking) cfg.line_speed = bps_to_speed_code(card->wandev.bps); cfg.txbuf_num = 4; cfg.mtu_local = card->wandev.mtu; cfg.mtu_remote = card->wandev.mtu; cfg.restart_tmr = 30; cfg.auth_rsrt_tmr = 30; cfg.auth_wait_tmr = 300; cfg.mdm_fail_tmr = 5; cfg.dtr_drop_tmr = 1; cfg.connect_tmout = 0; /* changed it from 900 */ cfg.conf_retry = 10; cfg.term_retry = 2; cfg.fail_retry = 5; cfg.auth_retry = 10; cfg.ip_options = 0x80; cfg.ipx_options = 0xA0; cfg.conf_flags |= 0x0E; /* cfg.ip_local = dev->pa_addr; cfg.ip_remote = dev->pa_dstaddr; */ return ppp_configure(card, &cfg); } /*============================================================================ * Configure S508 adapter. */ static int config508(sdla_t * card) { ppp508_conf_t cfg; /* Prepare PPP configuration structure */ memset(&cfg, 0, sizeof(ppp508_conf_t)); if (card->wandev.clocking) cfg.line_speed = card->wandev.bps; if (card->wandev.interface == WANOPT_RS232) cfg.conf_flags |= 0x0020; cfg.conf_flags |= 0x300; /*send Configure-Request packets forever */ cfg.txbuf_percent = 60; /* % of Tx bufs */ cfg.mtu_local = card->wandev.mtu; cfg.mtu_remote = card->wandev.mtu; cfg.restart_tmr = 30; cfg.auth_rsrt_tmr = 30; cfg.auth_wait_tmr = 300; cfg.mdm_fail_tmr = 100; cfg.dtr_drop_tmr = 1; cfg.connect_tmout = 0; /* changed it from 900 */ cfg.conf_retry = 10; cfg.term_retry = 2; cfg.fail_retry = 5; cfg.auth_retry = 10; cfg.ip_options = 0x80; cfg.ipx_options = 0xA0; /* cfg.ip_local = dev->pa_addr; cfg.ip_remote = dev->pa_dstaddr; */ return ppp_configure(card, &cfg); } /*============================================================================ * Show disconnection cause. */ static void show_disc_cause(sdla_t * card, unsigned cause) { if (cause & 0x0002) printk(KERN_INFO "%s: link terminated by peer\n", card->devname); else if (cause & 0x0004) printk(KERN_INFO "%s: link terminated by user\n", card->devname); else if (cause & 0x0008) printk(KERN_INFO "%s: authentication failed\n", card->devname); else if (cause & 0x0010) printk(KERN_INFO "%s: authentication protocol negotiation failed\n", card->devname); else if (cause & 0x0020) printk(KERN_INFO "%s: peer's request for authentication rejected\n", card->devname); else if (cause & 0x0040) printk(KERN_INFO "%s: MRU option rejected by peer\n", card->devname); else if (cause & 0x0080) printk(KERN_INFO "%s: peer's MRU was too small\n", card->devname); else if (cause & 0x0100) printk(KERN_INFO "%s: failed to negotiate peer's LCP options\n", card->devname); else if (cause & 0x0200) printk(KERN_INFO "%s: failed to negotiate peer's IPCP options\n" ,card->devname); else if (cause & 0x0400) printk(KERN_INFO "%s: failed to negotiate peer's IPXCP options\n", card->devname); } /*============================================================================ * Convert line speed in bps to a number used by S502 code. */ static unsigned char bps_to_speed_code(unsigned long bps) { unsigned char number; if (bps <= 1200) number = 0x01; else if (bps <= 2400) number = 0x02; else if (bps <= 4800) number = 0x03; else if (bps <= 9600) number = 0x04; else if (bps <= 19200) number = 0x05; else if (bps <= 38400) number = 0x06; else if (bps <= 45000) number = 0x07; else if (bps <= 56000) number = 0x08; else if (bps <= 64000) number = 0x09; else if (bps <= 74000) number = 0x0A; else if (bps <= 112000) number = 0x0B; else if (bps <= 128000) number = 0x0C; else number = 0x0D; return number; } /*============================================================================ * Process UDP call of type DRVSTATS. */ static int process_udp_driver_call(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct net_device *dev, ppp_private_area_t * ppp_priv_area) { unsigned char *sendpacket; unsigned char buf2[5]; unsigned char *data; unsigned char *buf; unsigned int len; ppp_mbox_t *mbox = card->mbox; struct sk_buff *new_skb; int err; sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); if ((data = kmalloc(2000, GFP_ATOMIC)) == NULL) { printk(KERN_INFO "%s: Error allocating memory for UDP DRIVER STATS cmnd0x%02X" ,card->devname, data[45]); ++ppp_priv_area->UDP_DRVSTATS_mgmt_kmalloc_err; return 1; } memcpy(data, sendpacket, skb->len); switch (data[45]) { /* PPIPE_DRIVER_STATISTICS */ case 0x26: *(unsigned long *) &data[60] = ppp_priv_area->if_send_entry; *(unsigned long *) &data[64] = ppp_priv_area->if_send_skb_null; *(unsigned long *) &data[68] = ppp_priv_area->if_send_broadcast; *(unsigned long *) &data[72] = ppp_priv_area->if_send_multicast; *(unsigned long *) &data[76] = ppp_priv_area->if_send_critical_ISR; *(unsigned long *) &data[80] = ppp_priv_area->if_send_critical_non_ISR; *(unsigned long *) &data[84] = ppp_priv_area->if_send_busy; *(unsigned long *) &data[88] = ppp_priv_area->if_send_busy_timeout; *(unsigned long *) &data[92] = ppp_priv_area->if_send_DRVSTATS_request; *(unsigned long *) &data[96] = ppp_priv_area->if_send_PTPIPE_request; *(unsigned long *) &data[100] = ppp_priv_area->if_send_wan_disconnected; *(unsigned long *) &data[104] = ppp_priv_area->if_send_adptr_bfrs_full; *(unsigned long *) &data[108] = ppp_priv_area->if_send_protocol_error; *(unsigned long *) &data[112] = ppp_priv_area->if_send_tx_int_enabled; *(unsigned long *) &data[116] = ppp_priv_area->if_send_bfr_passed_to_adptr; *(unsigned long *) &data[118] = card->irq_dis_if_send_count; mbox->cmd.length = 62; break; case 0x27: *(unsigned long *) &data[60] = card->statistics.isr_entry; *(unsigned long *) &data[64] = card->statistics.isr_already_critical; *(unsigned long *) &data[68] = card->statistics.isr_rx; *(unsigned long *) &data[72] = card->statistics.isr_tx; *(unsigned long *) &data[76] = card->statistics.isr_intr_test; *(unsigned long *) &data[80] = card->statistics.isr_spurious; *(unsigned long *) &data[84] = card->statistics.isr_enable_tx_int; *(unsigned long *) &data[88] = card->statistics.rx_intr_corrupt_rx_bfr; *(unsigned long *) &data[92] = ppp_priv_area->rx_intr_no_socket; *(unsigned long *) &data[96] = ppp_priv_area->rx_intr_DRVSTATS_request; *(unsigned long *) &data[100] = ppp_priv_area->rx_intr_PTPIPE_request; *(unsigned long *) &data[104] = ppp_priv_area->rx_intr_bfr_passed_to_stack; *(unsigned long *) &data[108] = card->statistics.rx_intr_dev_not_started; *(unsigned long *) &data[112] = card->statistics.tx_intr_dev_not_started; mbox->cmd.length = 56; break; case 0x28: *(unsigned long *) &data[60] = ppp_priv_area->UDP_PTPIPE_mgmt_kmalloc_err; *(unsigned long *) &data[64] = ppp_priv_area->UDP_PTPIPE_mgmt_adptr_type_err; *(unsigned long *) &data[68] = ppp_priv_area->UDP_PTPIPE_mgmt_direction_err; *(unsigned long *) &data[72] = ppp_priv_area-> UDP_PTPIPE_mgmt_adptr_cmnd_timeout; *(unsigned long *) &data[76] = ppp_priv_area->UDP_PTPIPE_mgmt_adptr_cmnd_OK; *(unsigned long *) &data[80] = ppp_priv_area->UDP_PTPIPE_mgmt_passed_to_adptr; *(unsigned long *) &data[84] = ppp_priv_area->UDP_PTPIPE_mgmt_passed_to_stack; *(unsigned long *) &data[88] = ppp_priv_area->UDP_PTPIPE_mgmt_no_socket; *(unsigned long *) &data[92] = ppp_priv_area->UDP_DRVSTATS_mgmt_kmalloc_err; *(unsigned long *) &data[96] = ppp_priv_area-> UDP_DRVSTATS_mgmt_adptr_cmnd_timeout; *(unsigned long *) &data[100] = ppp_priv_area->UDP_DRVSTATS_mgmt_adptr_cmnd_OK; *(unsigned long *) &data[104] = ppp_priv_area-> UDP_DRVSTATS_mgmt_passed_to_adptr; *(unsigned long *) &data[108] = ppp_priv_area-> UDP_DRVSTATS_mgmt_passed_to_stack; *(unsigned long *) &data[112] = ppp_priv_area->UDP_DRVSTATS_mgmt_no_socket; *(unsigned long *) &data[116] = card->statistics.poll_entry; *(unsigned long *) &data[120] = card->statistics.poll_already_critical; *(unsigned long *) &data[124] = card->statistics.poll_processed; *(unsigned long *) &data[126] = card->irq_dis_poll_count; mbox->cmd.length = 70; break; default: /* it's a board command */ memcpy(&mbox->cmd, &sendpacket[45], sizeof(ppp_cmd_t)); if (mbox->cmd.length) { memcpy(&mbox->data, &sendpacket[60], mbox->cmd.length); } /* run the command on the board */ err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) { ppp_error(card, err, mbox); ++ppp_priv_area-> UDP_DRVSTATS_mgmt_adptr_cmnd_timeout; break; } ++ppp_priv_area->UDP_DRVSTATS_mgmt_adptr_cmnd_OK; /* copy the result back to our buffer */ memcpy(data, sendpacket, skb->len); memcpy(&data[45], &mbox->cmd, sizeof(ppp_cmd_t)); if (mbox->cmd.length) { memcpy(&data[60], &mbox->data, mbox->cmd.length); } } /* Fill UDP TTL */ data[8] = card->wandev.ttl; len = reply_udp(data, mbox->cmd.length); if (udp_pkt_src == UDP_PKT_FRM_NETWORK) { ++ppp_priv_area->UDP_DRVSTATS_mgmt_passed_to_adptr; ppp_send(card, data, len, skb->protocol); } else { /* Pass it up the stack Allocate socket buffer */ if ((new_skb = dev_alloc_skb(len)) != NULL) { /* copy data into new_skb */ buf = skb_put(new_skb, len); memcpy(buf, data, len); ++ppp_priv_area->UDP_DRVSTATS_mgmt_passed_to_stack; /* Decapsulate packet and pass it up the protocol stack */ new_skb->protocol = htons(ETH_P_IP); new_skb->dev = dev; new_skb->mac.raw = new_skb->data; netif_rx(new_skb); } else { ++ppp_priv_area->UDP_DRVSTATS_mgmt_no_socket; printk(KERN_INFO "no socket buffers available!\n"); } } kfree(data); return 0; } /*============================================================================= * Process UDP call of type PTPIPEAB. */ static int process_udp_mgmt_pkt(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct net_device *dev, ppp_private_area_t * ppp_priv_area) { unsigned char *sendpacket; unsigned char buf2[5]; unsigned char *data; unsigned char *buf; unsigned int frames, len; struct sk_buff *new_skb; unsigned short buffer_length, real_len; unsigned long data_ptr; int udp_mgmt_req_valid = 1; ppp_mbox_t *mbox = card->mbox; struct timeval tv; int err; sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); if ((data = kmalloc(2000, GFP_ATOMIC)) == NULL) { printk(KERN_INFO "%s: Error allocating memory for UDP management cmnd0x%02X" ,card->devname, data[45]); ++ppp_priv_area->UDP_PTPIPE_mgmt_kmalloc_err; return 1; } memcpy(data, sendpacket, skb->len); switch (data[45]) { /* FT1 MONITOR STATUS */ case 0x80: if (card->hw.fwid != SFID_PPP508) { ++ppp_priv_area->UDP_PTPIPE_mgmt_adptr_type_err; udp_mgmt_req_valid = 0; break; } /* PPIPE_ENABLE_TRACING */ case 0x20: /* PPIPE_DISABLE_TRACING */ case 0x21: /* PPIPE_GET_TRACE_INFO */ case 0x22: /* SET FT1 MODE */ case 0x81: if (udp_pkt_src == UDP_PKT_FRM_NETWORK) { ++ppp_priv_area->UDP_PTPIPE_mgmt_direction_err; udp_mgmt_req_valid = 0; } break; default: break; } if (!udp_mgmt_req_valid) { /* set length to 0 */ data[46] = data[47] = 0; /* set return code */ data[48] = 0xCD; } else { switch (data[45]) { /* PPIPE_ENABLE_TRACING */ case 0x20: if (!TracingEnabled) { /* OPERATE_DATALINE_MONITOR */ mbox->cmd.command = 0x33; mbox->cmd.length = 1; mbox->data[0] = 0x03; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) { ppp_error(card, err, mbox); TracingEnabled = 0; /* set the return code */ data[48] = mbox->cmd.result; mbox->cmd.length = 0; break; } if (card->hw.fwid == SFID_PPP502) { sdla_peek(&card->hw, 0x9000, &buf2, 2); } else { sdla_peek(&card->hw, 0xC000, &buf2, 2); } curr_trace_addr = 0; memcpy(&curr_trace_addr, &buf2, 2); start_trace_addr = curr_trace_addr; /* MAX_SEND_BUFFER_SIZE -sizeof(UDP_MGMT_PACKET) - 41 */ available_buffer_space = 1926; } data[48] = 0; mbox->cmd.length = 0; TracingEnabled = 1; break; /* PPIPE_DISABLE_TRACING */ case 0x21: if (TracingEnabled) { /* OPERATE_DATALINE_MONITOR */ mbox->cmd.command = 0x3; mbox->cmd.length = 1; mbox->data[0] = 0x00; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } /*set return code */ data[48] = 0; mbox->cmd.length = 0; TracingEnabled = 0; break; /* PPIPE_GET_TRACE_INFO */ case 0x22: if (TracingEnabled) { buffer_length = 0; /* frames < NUM_TRACE_FRAMES */ for (frames = 0; frames < 62; frames += 1) { sdla_peek(&card->hw, curr_trace_addr, &buf2, 1); /* no data on board so exit */ if (buf2[0] == 0x00) break; /*1+sizeof(FRAME_DATA) = 9 */ if ((available_buffer_space - buffer_length) < 9) { /*indicate we have more frames on board and exit */ data[60] |= 0x02; break; } /* get frame status */ sdla_peek(&card->hw, curr_trace_addr + 0x01, &data[60 + buffer_length], 1); /* get time stamp */ sdla_peek(&card->hw, curr_trace_addr + 0x06, &data[64 + buffer_length], 2); /* get frame length */ sdla_peek(&card->hw, curr_trace_addr + 0x02, &data[62 + buffer_length], 2); /* get pointer to real data */ sdla_peek(&card->hw, curr_trace_addr + 0x04, &buf2, 2); data_ptr = 0; memcpy(&data_ptr, &buf2, 2); /* see if we can fit the frame into the user buffer */ memcpy(&real_len, &data[62 + buffer_length], 2); if ((data_ptr == 0) || ((real_len + 8) > available_buffer_space)) { data[61 + buffer_length] = 0x00; } else { /* we can take it next time */ if ((available_buffer_space - buffer_length) < (real_len + 8)) { data[60] |= 0x02; break; } /* ok, get the frame */ data[61 + buffer_length] = 0x01; /* get the data */ sdla_peek(&card->hw, data_ptr, &data[66 + buffer_length], real_len); /* zero the opp flag to show we got the frame */ buf2[0] = 0x00; sdla_poke(&card->hw, curr_trace_addr, &buf2, 1); /* now move onto the next frame */ curr_trace_addr += 8; /* check if we passed the last address */ if (curr_trace_addr >= start_trace_addr + 0x1F0) { curr_trace_addr = start_trace_addr; } /* update buffer length and make sure its even */ if (data[61 + buffer_length] == 0x01) { buffer_length += real_len - 1; } /* for the header */ buffer_length += 8; if (buffer_length & 0x0001) buffer_length += 1; } } /* ok now set the total number of frames passed in the high 5 bits */ data[60] = (frames << 2) | data[60]; /* set the data length */ mbox->cmd.length = buffer_length; memcpy(&data[46], &buffer_length, 2); /* set return code */ data[48] = 0; } else { /* set return code */ data[48] = 1; mbox->cmd.length = 0; } break; /* PPIPE_GET_IBA_DATA */ case 0x23: mbox->cmd.length = 0x09; if (card->hw.fwid == SFID_PPP502) { sdla_peek(&card->hw, 0xA003, &data[60], mbox->cmd.length); } else { sdla_peek(&card->hw, 0xF003, &data[60], mbox->cmd.length); } /* set the length of the data */ data[46] = 0x09; /* set return code */ data[48] = 0x00; break; /* PPIPE_KILL_BOARD */ case 0x24: break; /* PPIPE_FT1_READ_STATUS */ case 0x25: sdla_peek(&card->hw, 0xF020, &data[60], 2); data[46] = 2; data[47] = 0; data[48] = 0; mbox->cmd.length = 2; break; case 0x29: init_ppp_priv_struct(ppp_priv_area); init_global_statistics(card); mbox->cmd.length = 0; break; case 0x30: do_gettimeofday(&tv); ppp_priv_area->router_up_time = tv.tv_sec - ppp_priv_area->router_start_time; *(unsigned long *) &data[60] = ppp_priv_area->router_up_time; mbox->cmd.length = 4; break; /* FT1 MONITOR STATUS */ case 0x80: /* Enable FT1 MONITOR STATUS */ if (data[60] == 1) { if (rCount++ != 0) { data[48] = 0; mbox->cmd.length = 1; break; } } /* Disable FT1 MONITOR STATUS */ if (data[60] == 0) { if (--rCount != 0) { data[48] = 0; mbox->cmd.length = 1; break; } } default: /* it's a board command */ memcpy(&mbox->cmd, &sendpacket[45], sizeof(ppp_cmd_t)); if (mbox->cmd.length) { memcpy(&mbox->data, &sendpacket[60], mbox->cmd.length); } /* run the command on the board */ err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) { ppp_error(card, err, mbox); ++ppp_priv_area-> UDP_PTPIPE_mgmt_adptr_cmnd_timeout; break; } ++ppp_priv_area->UDP_PTPIPE_mgmt_adptr_cmnd_OK; /* copy the result back to our buffer */ memcpy(data, sendpacket, skb->len); memcpy(&data[45], &mbox->cmd, sizeof(ppp_cmd_t)); if (mbox->cmd.length) { memcpy(&data[60], &mbox->data, mbox->cmd.length); } } /* end of switch */ } /* end of else */ /* Fill UDP TTL */ data[8] = card->wandev.ttl; len = reply_udp(data, mbox->cmd.length); if (udp_pkt_src == UDP_PKT_FRM_NETWORK) { ++ppp_priv_area->UDP_PTPIPE_mgmt_passed_to_adptr; ppp_send(card, data, len, skb->protocol); } else { /* Pass it up the stack Allocate socket buffer */ if ((new_skb = dev_alloc_skb(len)) != NULL) { /* copy data into new_skb */ buf = skb_put(new_skb, len); memcpy(buf, data, len); ++ppp_priv_area->UDP_PTPIPE_mgmt_passed_to_stack; /* Decapsulate packet and pass it up the protocol stack */ new_skb->protocol = htons(ETH_P_IP); new_skb->dev = dev; new_skb->mac.raw = new_skb->data; netif_rx(new_skb); } else { ++ppp_priv_area->UDP_PTPIPE_mgmt_no_socket; printk(KERN_INFO "no socket buffers available!\n"); } } kfree(data); return 0; } /*============================================================================= * Initial the ppp_private_area structure. */ static void init_ppp_priv_struct(ppp_private_area_t * ppp_priv_area) { ppp_priv_area->if_send_entry = 0; ppp_priv_area->if_send_skb_null = 0; ppp_priv_area->if_send_broadcast = 0; ppp_priv_area->if_send_multicast = 0; ppp_priv_area->if_send_critical_ISR = 0; ppp_priv_area->if_send_critical_non_ISR = 0; ppp_priv_area->if_send_busy = 0; ppp_priv_area->if_send_busy_timeout = 0; ppp_priv_area->if_send_DRVSTATS_request = 0; ppp_priv_area->if_send_PTPIPE_request = 0; ppp_priv_area->if_send_wan_disconnected = 0; ppp_priv_area->if_send_adptr_bfrs_full = 0; ppp_priv_area->if_send_bfr_passed_to_adptr = 0; ppp_priv_area->rx_intr_no_socket = 0; ppp_priv_area->rx_intr_DRVSTATS_request = 0; ppp_priv_area->rx_intr_PTPIPE_request = 0; ppp_priv_area->rx_intr_bfr_not_passed_to_stack = 0; ppp_priv_area->rx_intr_bfr_passed_to_stack = 0; ppp_priv_area->UDP_PTPIPE_mgmt_kmalloc_err = 0; ppp_priv_area->UDP_PTPIPE_mgmt_adptr_type_err = 0; ppp_priv_area->UDP_PTPIPE_mgmt_direction_err = 0; ppp_priv_area->UDP_PTPIPE_mgmt_adptr_cmnd_timeout = 0; ppp_priv_area->UDP_PTPIPE_mgmt_adptr_cmnd_OK = 0; ppp_priv_area->UDP_PTPIPE_mgmt_passed_to_adptr = 0; ppp_priv_area->UDP_PTPIPE_mgmt_passed_to_stack = 0; ppp_priv_area->UDP_PTPIPE_mgmt_no_socket = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_kmalloc_err = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_adptr_type_err = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_direction_err = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_adptr_cmnd_timeout = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_adptr_cmnd_OK = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_passed_to_adptr = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_passed_to_stack = 0; ppp_priv_area->UDP_DRVSTATS_mgmt_no_socket = 0; } /*============================================================================ * Initialize Global Statistics */ static void init_global_statistics(sdla_t * card) { card->statistics.isr_entry = 0; card->statistics.isr_already_critical = 0; card->statistics.isr_tx = 0; card->statistics.isr_rx = 0; card->statistics.isr_intr_test = 0; card->statistics.isr_spurious = 0; card->statistics.isr_enable_tx_int = 0; card->statistics.rx_intr_corrupt_rx_bfr = 0; card->statistics.rx_intr_dev_not_started = 0; card->statistics.tx_intr_dev_not_started = 0; card->statistics.poll_entry = 0; card->statistics.poll_already_critical = 0; card->statistics.poll_processed = 0; card->statistics.poll_tbusy_bad_status = 0; } /*============================================================================ * Initialize Receive and Transmit Buffers. */ static void init_ppp_tx_rx_buff(sdla_t * card) { if (card->hw.fwid == SFID_PPP502) { ppp502_buf_info_t *info = (void *) (card->hw.dpmbase + PPP502_BUF_OFFS); card->u.p.txbuf_base = (void *) (card->hw.dpmbase + info->txb_offs); card->u.p.txbuf_last = (ppp_buf_ctl_t *) card->u.p.txbuf_base + (info->txb_num - 1); card->u.p.rxbuf_base = (void *) (card->hw.dpmbase + info->rxb_offs); card->u.p.rxbuf_last = (ppp_buf_ctl_t *) card->u.p.rxbuf_base + (info->rxb_num - 1); } else { ppp508_buf_info_t *info = (void *) (card->hw.dpmbase + PPP508_BUF_OFFS); card->u.p.txbuf_base = (void *) (card->hw.dpmbase + (info->txb_ptr - PPP508_MB_VECT)); card->u.p.txbuf_last = (ppp_buf_ctl_t *) card->u.p.txbuf_base + (info->txb_num - 1); card->u.p.rxbuf_base = (void *) (card->hw.dpmbase + (info->rxb_ptr - PPP508_MB_VECT)); card->u.p.rxbuf_last = (ppp_buf_ctl_t *) card->u.p.rxbuf_base + (info->rxb_num - 1); card->u.p.rx_base = info->rxb_base; card->u.p.rx_top = info->rxb_end; } card->u.p.txbuf = card->u.p.txbuf_base; card->rxmb = card->u.p.rxbuf_base; } /*============================================================================= * Perform the Interrupt Test by running the READ_CODE_VERSION command MAX_INTR * _TEST_COUNTER times. */ static int intr_test(sdla_t * card) { ppp_mbox_t *mb = card->mbox; int err, i; /* The critical flag is unset because during initialization (if_open) * we want the interrupts to be enabled so that when the wpp_isr is * called it does not exit due to critical flag set. */ card->wandev.critical = 0; err = ppp_set_intr_mode(card, 0x08); if (err == CMD_OK) { for (i = 0; i < MAX_INTR_TEST_COUNTER; i++) { /* Run command READ_CODE_VERSION */ memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); mb->cmd.length = 0; mb->cmd.command = 0x10; err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; if (err != CMD_OK) ppp_error(card, err, mb); } } else return err; err = ppp_set_intr_mode(card, 0); if (err != CMD_OK) return err; card->wandev.critical = 1; return 0; } /*============================================================================== * Determine what type of UDP call it is. DRVSTATS or PTPIPEAB ? */ static int udp_pkt_type(struct sk_buff *skb, sdla_t * card) { unsigned char *sendpacket; unsigned char buf2[5]; sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); if (sendpacket[0] == 0x45 && /* IP packet */ sendpacket[9] == 0x11 && /* UDP packet */ sendpacket[22] == buf2[1] && /* UDP Port */ sendpacket[23] == buf2[0] && sendpacket[36] == 0x01) { if (sendpacket[28] == 0x50 && /* PTPIPEAB: Signature */ sendpacket[29] == 0x54 && sendpacket[30] == 0x50 && sendpacket[31] == 0x49 && sendpacket[32] == 0x50 && sendpacket[33] == 0x45 && sendpacket[34] == 0x41 && sendpacket[35] == 0x42) { return UDP_PTPIPE_TYPE; } else if (sendpacket[28] == 0x44 && /* DRVSTATS: Signature */ sendpacket[29] == 0x52 && sendpacket[30] == 0x56 && sendpacket[31] == 0x53 && sendpacket[32] == 0x54 && sendpacket[33] == 0x41 && sendpacket[34] == 0x54 && sendpacket[35] == 0x53) { return UDP_DRVSTATS_TYPE; } else return UDP_INVALID_TYPE; } else return UDP_INVALID_TYPE; } /****** End *****************************************************************/