diff options
Diffstat (limited to 'drivers/net/wan/sdla_ppp.c')
| -rw-r--r-- | drivers/net/wan/sdla_ppp.c | 3429 |
1 files changed, 3429 insertions, 0 deletions
diff --git a/drivers/net/wan/sdla_ppp.c b/drivers/net/wan/sdla_ppp.c new file mode 100644 index 00000000000..1761cb68ab4 --- /dev/null +++ b/drivers/net/wan/sdla_ppp.c @@ -0,0 +1,3429 @@ +/***************************************************************************** +* sdla_ppp.c WANPIPE(tm) Multiprotocol WAN Link Driver. PPP module. +* +* Author: Nenad Corbic <ncorbic@sangoma.com> +* +* Copyright: (c) 1995-2001 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. +* ============================================================================ +* Feb 28, 2001 Nenad Corbic o Updated if_tx_timeout() routine for +* 2.4.X kernels. +* Nov 29, 2000 Nenad Corbic o Added the 2.4.x kernel support: +* get_ip_address() function has moved +* into the ppp_poll() routine. It cannot +* be called from an interrupt. +* Nov 07, 2000 Nenad Corbic o Added security features for UDP debugging: +* Deny all and specify allowed requests. +* May 02, 2000 Nenad Corbic o Added the dynamic interface shutdown +* option. When the link goes down, the +* network interface IFF_UP flag is reset. +* Mar 06, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery. +* Feb 25, 2000 Nenad Corbic o Fixed the FT1 UDP debugger problem. +* Feb 09, 2000 Nenad Coribc o Shutdown bug fix. update() was called +* with NULL dev pointer: no check. +* Jan 24, 2000 Nenad Corbic o Disabled use of CMD complete inter. +* Dev 15, 1999 Nenad Corbic o Fixed up header files for 2.0.X kernels +* Oct 25, 1999 Nenad Corbic o Support for 2.0.X kernels +* Moved dynamic route processing into +* a polling routine. +* Oct 07, 1999 Nenad Corbic o Support for S514 PCI card. +* Gideon Hack o UPD and Updates executed using timer interrupt +* Sep 10, 1999 Nenad Corbic o Fixed up the /proc statistics +* Jul 20, 1999 Nenad Corbic o Remove the polling routines and use +* interrupts instead. +* Sep 17, 1998 Jaspreet Singh o Updates for 2.2.X Kernels. +* Aug 13, 1998 Jaspreet Singh o Improved Line Tracing. +* Jun 22, 1998 David Fong o Added remote IP address assignment +* Mar 15, 1998 Alan Cox o 2.1.8x basic port. +* Apr 16, 1998 Jaspreet Singh o using htons() for the IPX protocol. +* Dec 09, 1997 Jaspreet Singh o Added PAP and CHAP. +* o Implemented new routines like +* ppp_set_inbnd_auth(), ppp_set_outbnd_auth(), +* tokenize() and strstrip(). +* 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 <linux/module.h> +#include <linux/kernel.h> /* printk(), and other useful stuff */ +#include <linux/stddef.h> /* offsetof(), etc. */ +#include <linux/errno.h> /* return codes */ +#include <linux/string.h> /* inline memset(), etc. */ +#include <linux/slab.h> /* kmalloc(), kfree() */ +#include <linux/wanrouter.h> /* WAN router definitions */ +#include <linux/wanpipe.h> /* WANPIPE common user API definitions */ +#include <linux/if_arp.h> /* ARPHRD_* defines */ +#include <asm/byteorder.h> /* htons(), etc. */ +#include <linux/in.h> /* sockaddr_in */ + + +#include <asm/uaccess.h> +#include <linux/inetdevice.h> +#include <linux/netdevice.h> + +#include <linux/if.h> +#include <linux/sdla_ppp.h> /* PPP firmware API definitions */ +#include <linux/sdlasfm.h> /* S514 Type Definition */ +/****** Defines & Macros ****************************************************/ + +#define PPP_DFLT_MTU 1500 /* default MTU */ +#define PPP_MAX_MTU 4000 /* maximum MTU */ +#define PPP_HDR_LEN 1 + +#define MAX_IP_ERRORS 100 + +#define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */ +#define HOLD_DOWN_TIME (5*HZ) /* link hold down time : Changed from 30 to 5 */ + +/* 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))) + +/* Macro for enabling/disabling debugging comments */ +//#define NEX_DEBUG +#ifdef NEX_DEBUG +#define NEX_PRINTK(format, a...) printk(format, ## a) +#else +#define NEX_PRINTK(format, a...) +#endif /* NEX_DEBUG */ + +#define DCD(a) ( a & 0x08 ? "HIGH" : "LOW" ) +#define CTS(a) ( a & 0x20 ? "HIGH" : "LOW" ) +#define LCP(a) ( a == 0x09 ? "OPEN" : "CLOSED" ) +#define IP(a) ( a == 0x09 ? "ENABLED" : "DISABLED" ) + +#define TMR_INT_ENABLED_UPDATE 0x01 +#define TMR_INT_ENABLED_PPP_EVENT 0x02 +#define TMR_INT_ENABLED_UDP 0x04 +#define TMR_INT_ENABLED_CONFIG 0x20 + +/* Set Configuraton Command Definitions */ +#define PERCENT_TX_BUFF 60 +#define TIME_BETWEEN_CONF_REQ 30 +#define TIME_BETWEEN_PAP_CHAP_REQ 30 +#define WAIT_PAP_CHAP_WITHOUT_REPLY 300 +#define WAIT_AFTER_DCD_CTS_LOW 5 +#define TIME_DCD_CTS_LOW_AFTER_LNK_DOWN 10 +#define WAIT_DCD_HIGH_AFTER_ENABLE_COMM 900 +#define MAX_CONF_REQ_WITHOUT_REPLY 10 +#define MAX_TERM_REQ_WITHOUT_REPLY 2 +#define NUM_CONF_NAK_WITHOUT_REPLY 5 +#define NUM_AUTH_REQ_WITHOUT_REPLY 10 + +#define END_OFFSET 0x1F0 + + +/******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 +{ + struct net_device *slave; + 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*/ + unsigned char enable_IPX; + unsigned long network_number; + unsigned char pap; + unsigned char chap; + unsigned char sysname[31]; /* system name for in-bnd auth*/ + unsigned char userid[511]; /* list of user ids */ + unsigned char passwd[511]; /* list of passwords */ + unsigned protocol; /* SKB Protocol */ + u32 ip_local; /* Local IP Address */ + u32 ip_remote; /* remote IP Address */ + + u32 ip_local_tmp; + u32 ip_remote_tmp; + + unsigned char timer_int_enabled; /* Who enabled the timer inter*/ + unsigned char update_comms_stats; /* Used by update function */ + unsigned long curr_trace_addr; /* Trace information */ + unsigned long start_trace_addr; + unsigned long end_trace_addr; + + unsigned char interface_down; /* Brind down interface when channel + goes down */ + unsigned long config_wait_timeout; /* After if_open() if in dynamic if mode, + wait a few seconds before configuring */ + + unsigned short udp_pkt_lgth; + char udp_pkt_src; + char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT]; + + /* PPP specific statistics */ + + if_send_stat_t if_send_stat; + rx_intr_stat_t rx_intr_stat; + pipe_mgmt_stat_t pipe_mgmt_stat; + + unsigned long router_up_time; + + /* Polling work queue entry. Each interface + * has its own work queue entry, which is used + * to defer events from the interrupt */ + struct work_struct poll_work; + struct timer_list poll_delay_timer; + + u8 gateway; + u8 config_ppp; + u8 ip_error; + +}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(struct wan_device *wandev); +static int new_if(struct wan_device *wandev, struct net_device *dev, + wanif_conf_t *conf); +static int del_if(struct wan_device *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 void if_tx_timeout(struct net_device *dev); + +static int if_rebuild_hdr(struct sk_buff *skb); +static struct net_device_stats *if_stats(struct net_device *dev); +static int if_send(struct sk_buff *skb, struct net_device *dev); + + +/* PPP firmware interface functions */ +static int ppp_read_version(sdla_t *card, char *str); +static int ppp_set_outbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area); +static int ppp_set_inbnd_auth(sdla_t *card, ppp_private_area_t *ppp_priv_area); +static int ppp_configure(sdla_t *card, void *data); +static int ppp_set_intr_mode(sdla_t *card, unsigned char mode); +static int ppp_comm_enable(sdla_t *card); +static int ppp_comm_disable(sdla_t *card); +static int ppp_comm_disable_shutdown(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); + +static void wpp_isr(sdla_t *card); +static void rx_intr(sdla_t *card); +static void event_intr(sdla_t *card); +static void timer_intr(sdla_t *card); + +/* Background polling routines */ +static void process_route(sdla_t *card); +static void retrigger_comm(sdla_t *card); + +/* Miscellaneous functions */ +static int read_info( sdla_t *card ); +static int read_connection_info (sdla_t *card); +static void remove_route( sdla_t *card ); +static int config508(struct net_device *dev, sdla_t *card); +static void show_disc_cause(sdla_t * card, unsigned cause); +static int reply_udp( unsigned char *data, unsigned int mbox_len ); +static void process_udp_mgmt_pkt(sdla_t *card, 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 tokenize(char *str, char **tokens); +static char* strstrip(char *str, char *s); +static int chk_bcast_mcast_addr(sdla_t* card, struct net_device* dev, + struct sk_buff *skb); + +static int config_ppp (sdla_t *); +static void ppp_poll(struct net_device *dev); +static void trigger_ppp_poll(struct net_device *dev); +static void ppp_poll_delay (unsigned long dev_ptr); + + +static int Read_connection_info; +static int Intr_test_counter; +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_PX, + unsigned long network_number, unsigned short proto); + +/* Lock Functions */ +static void s508_lock (sdla_t *card, unsigned long *smp_flags); +static void s508_unlock (sdla_t *card, unsigned long *smp_flags); + +static int store_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 unsigned short calc_checksum (char *data, int len); +static void disable_comm (sdla_t *card); +static int detect_and_fix_tx_bug (sdla_t *card); + +/****** 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) +{ + ppp_flags_t *flags; + 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 miscellaneous pointers to structures on the adapter */ + switch (card->hw.type) { + + case SDLA_S508: + card->mbox =(void*)(card->hw.dpmbase + PPP508_MB_OFFS); + card->flags=(void*)(card->hw.dpmbase + PPP508_FLG_OFFS); + break; + + case SDLA_S514: + card->mbox =(void*)(card->hw.dpmbase + PPP514_MB_OFFS); + card->flags=(void*)(card->hw.dpmbase + PPP514_FLG_OFFS); + break; + + default: + return -EINVAL; + + } + flags = card->flags; + + /* 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_t(unsigned int, 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 = NULL; + card->exec = &wpp_exec; + card->wandev.update = &update; + card->wandev.new_if = &new_if; + card->wandev.del_if = &del_if; + card->wandev.udp_port = conf->udp_port; + card->wandev.ttl = conf->ttl; + card->wandev.state = WAN_DISCONNECTED; + card->disable_comm = &disable_comm; + card->irq_dis_if_send_count = 0; + card->irq_dis_poll_count = 0; + card->u.p.authenticator = conf->u.ppp.authenticator; + card->u.p.ip_mode = conf->u.ppp.ip_mode ? + conf->u.ppp.ip_mode : WANOPT_PPP_STATIC; + card->TracingEnabled = 0; + Read_connection_info = 1; + + /* initialize global statistics */ + init_global_statistics( card ); + + + + if (!card->configured){ + int err; + + Intr_test_counter = 0; + err = intr_test(card); + + if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) { + printk("%s: Interrupt Test Failed, Counter: %i\n", + card->devname, Intr_test_counter); + printk( "%s: Please choose another interrupt\n",card->devname); + return -EIO; + } + + printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n", + card->devname, Intr_test_counter); + card->configured = 1; + } + + ppp_set_intr_mode(card, PPP_INTR_TIMER); + + /* Turn off the transmit and timer interrupt */ + flags->imask &= ~PPP_INTR_TIMER; + + printk(KERN_INFO "\n"); + + return 0; +} + +/******* WAN Device Driver Entry Points *************************************/ + +/*============================================================================ + * Update device status & statistics. + */ +static int update(struct wan_device *wandev) +{ + sdla_t* card = wandev->private; + struct net_device* dev; + volatile ppp_private_area_t *ppp_priv_area; + ppp_flags_t *flags = card->flags; + unsigned long timeout; + + /* sanity checks */ + if ((wandev == NULL) || (wandev->private == NULL)) + return -EFAULT; + + if (wandev->state == WAN_UNCONFIGURED) + return -ENODEV; + + /* Shutdown bug fix. This function can be + * called with NULL dev pointer during + * shutdown + */ + if ((dev=card->wandev.dev) == NULL){ + return -ENODEV; + } + + if ((ppp_priv_area=dev->priv) == NULL){ + return -ENODEV; + } + + ppp_priv_area->update_comms_stats = 2; + ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UPDATE; + flags->imask |= PPP_INTR_TIMER; + + /* wait a maximum of 1 second for the statistics to be updated */ + timeout = jiffies; + for(;;) { + if(ppp_priv_area->update_comms_stats == 0){ + break; + } + if ((jiffies - timeout) > (1 * HZ)){ + ppp_priv_area->update_comms_stats = 0; + ppp_priv_area->timer_int_enabled &= + ~TMR_INT_ENABLED_UPDATE; + return -EAGAIN; + } + } + + 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(struct wan_device *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; + + + printk(KERN_INFO "%s: Configuring Interface: %s\n", + card->devname, conf->name); + + 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; + ppp_priv_area->pap = conf->pap; + ppp_priv_area->chap = conf->chap; + + /* Option to bring down the interface when + * the link goes down */ + if (conf->if_down){ + set_bit(DYN_OPT_ON,&ppp_priv_area->interface_down); + printk("%s: Dynamic interface configuration enabled\n", + card->devname); + } + + /* If no user ids are specified */ + if(!strlen(conf->userid) && (ppp_priv_area->pap||ppp_priv_area->chap)){ + kfree(ppp_priv_area); + return -EINVAL; + } + + /* If no passwords are specified */ + if(!strlen(conf->passwd) && (ppp_priv_area->pap||ppp_priv_area->chap)){ + kfree(ppp_priv_area); + return -EINVAL; + } + + if(strlen(conf->sysname) > 31){ + kfree(ppp_priv_area); + return -EINVAL; + } + + /* If no system name is specified */ + if(!strlen(conf->sysname) && (card->u.p.authenticator)){ + kfree(ppp_priv_area); + return -EINVAL; + } + + /* copy the data into the ppp private structure */ + memcpy(ppp_priv_area->userid, conf->userid, strlen(conf->userid)); + memcpy(ppp_priv_area->passwd, conf->passwd, strlen(conf->passwd)); + memcpy(ppp_priv_area->sysname, conf->sysname, strlen(conf->sysname)); + + + ppp_priv_area->enable_IPX = conf->enable_IPX; + if (conf->network_number){ + ppp_priv_area->network_number = conf->network_number; + }else{ + ppp_priv_area->network_number = 0xDEADBEEF; + } + + /* Tells us that if this interface is a + * gateway or not */ + if ((ppp_priv_area->gateway = conf->gateway) == WANOPT_YES){ + printk(KERN_INFO "%s: Interface %s is set as a gateway.\n", + card->devname,card->u.p.if_name); + } + + /* prepare network device data space for registration */ + strcpy(dev->name,card->u.p.if_name); + + dev->init = &if_init; + dev->priv = ppp_priv_area; + dev->mtu = min_t(unsigned int, dev->mtu, card->wandev.mtu); + + /* Initialize the polling work routine */ + INIT_WORK(&ppp_priv_area->poll_work, (void*)(void*)ppp_poll, dev); + + /* Initialize the polling delay timer */ + init_timer(&ppp_priv_area->poll_delay_timer); + ppp_priv_area->poll_delay_timer.data = (unsigned long)dev; + ppp_priv_area->poll_delay_timer.function = ppp_poll_delay; + + + /* Since we start with dummy IP addresses we can say + * that route exists */ + printk(KERN_INFO "\n"); + + return 0; +} + +/*============================================================================ + * Delete logical channel. + */ +static int del_if(struct wan_device *wandev, struct net_device *dev) +{ + return 0; +} + +static void disable_comm (sdla_t *card) +{ + ppp_comm_disable_shutdown(card); + return; +} + +/****** WANPIPE-specific entry points ***************************************/ + +/*============================================================================ + * Execute adapter interface command. + */ + +//FIXME: Why do we need this ???? +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; + struct wan_device *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; + dev->tx_timeout = &if_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + + /* Initialize media-specific parameters */ + dev->type = ARPHRD_PPP; /* ARP h/w type */ + dev->flags |= IFF_POINTOPOINT; + dev->flags |= IFF_NOARP; + + /* Enable Mulitcasting if specified by user*/ + if (ppp_priv_area->mc == WANOPT_YES){ + dev->flags |= IFF_MULTICAST; + } + + 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 = wandev->maddr; + dev->mem_end = wandev->maddr + wandev->msize - 1; + + /* Set transmit buffer queue length */ + dev->tx_queue_len = 100; + SET_MODULE_OWNER(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; + struct timeval tv; + //unsigned long smp_flags; + + if (netif_running(dev)) + return -EBUSY; + + wanpipe_open(card); + + netif_start_queue(dev); + + do_gettimeofday( &tv ); + ppp_priv_area->router_start_time = tv.tv_sec; + + /* We cannot configure the card here because we don't + * have access to the interface IP addresses. + * Once the interface initilization is complete, we will be + * able to access the IP addresses. Therefore, + * configure the ppp link in the poll routine */ + set_bit(0,&ppp_priv_area->config_ppp); + ppp_priv_area->config_wait_timeout=jiffies; + + /* Start the PPP configuration after 1sec delay. + * This will give the interface initilization time + * to finish its configuration */ + mod_timer(&ppp_priv_area->poll_delay_timer, jiffies + HZ); + return 0; +} + +/*============================================================================ + * 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; + + netif_stop_queue(dev); + wanpipe_close(card); + + del_timer (&ppp_priv_area->poll_delay_timer); + 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 = htons(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; +} + +/*============================================================================ + * Handle transmit timeout event from netif watchdog + */ +static void if_tx_timeout(struct net_device *dev) +{ + ppp_private_area_t* chan = dev->priv; + sdla_t *card = chan->card; + + /* 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. + */ + + ++ chan->if_send_stat.if_send_tbusy; + ++card->wandev.stats.collisions; + + printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name); + ++chan->if_send_stat.if_send_tbusy_timeout; + netif_wake_queue (dev); +} + + + +/*============================================================================ + * 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 smp_flags; + ppp_flags_t *flags = card->flags; + int udp_type; + int err=0; + + ++ppp_priv_area->if_send_stat.if_send_entry; + + netif_stop_queue(dev); + + 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_stat.if_send_skb_null; + + netif_wake_queue(dev); + return 0; + } + + sendpacket = skb->data; + + udp_type = udp_pkt_type( skb, card ); + + + if (udp_type == UDP_PTPIPE_TYPE){ + if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev, + ppp_priv_area)){ + flags->imask |= PPP_INTR_TIMER; + } + ++ppp_priv_area->if_send_stat.if_send_PIPE_request; + netif_start_queue(dev); + return 0; + } + + /* Check for broadcast and multicast addresses + * If found, drop (deallocate) a packet and return. + */ + if(chk_bcast_mcast_addr(card, dev, skb)){ + ++card->wandev.stats.tx_dropped; + dev_kfree_skb_any(skb); + netif_start_queue(dev); + return 0; + } + + + if(card->hw.type != SDLA_S514){ + s508_lock(card,&smp_flags); + } + + if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) { + + printk(KERN_INFO "%s: Critical in if_send: %lx\n", + card->wandev.name,card->wandev.critical); + + ++card->wandev.stats.tx_dropped; + ++ppp_priv_area->if_send_stat.if_send_critical_non_ISR; + netif_start_queue(dev); + goto if_send_exit_crit; + } + + if (card->wandev.state != WAN_CONNECTED) { + + ++ppp_priv_area->if_send_stat.if_send_wan_disconnected; + ++card->wandev.stats.tx_dropped; + netif_start_queue(dev); + + } else if (!skb->protocol) { + ++ppp_priv_area->if_send_stat.if_send_protocol_error; + ++card->wandev.stats.tx_errors; + netif_start_queue(dev); + + } else { + + /*If it's IPX change the network numbers to 0 if they're ours.*/ + if( skb->protocol == htons(ETH_P_IPX) ) { + if(ppp_priv_area->enable_IPX) { + switch_net_numbers( skb->data, + ppp_priv_area->network_number, 0); + } else { + ++card->wandev.stats.tx_dropped; + netif_start_queue(dev); + goto if_send_exit_crit; + } + } + + if (ppp_send(card, skb->data, skb->len, skb->protocol)) { + netif_stop_queue(dev); + ++ppp_priv_area->if_send_stat.if_send_adptr_bfrs_full; + ++ppp_priv_area->if_send_stat.if_send_tx_int_enabled; + } else { + ++ppp_priv_area->if_send_stat.if_send_bfr_passed_to_adptr; + ++card->wandev.stats.tx_packets; + card->wandev.stats.tx_bytes += skb->len; + netif_start_queue(dev); + dev->trans_start = jiffies; + } + } + +if_send_exit_crit: + + if (!(err=netif_queue_stopped(dev))){ + dev_kfree_skb_any(skb); + }else{ + ppp_priv_area->tick_counter = jiffies; + flags->imask |= PPP_INTR_TXRDY; /* unmask Tx interrupts */ + } + + clear_bit(SEND_CRIT,&card->wandev.critical); + if(card->hw.type != SDLA_S514){ + s508_unlock(card,&smp_flags); + } + + return err; +} + + +/*============================================================================= + * Store a UDP management packet for later processing. + */ + +static int store_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 ) +{ + int udp_pkt_stored = 0; + + if(!ppp_priv_area->udp_pkt_lgth && (skb->len<=MAX_LGTH_UDP_MGNT_PKT)){ + ppp_priv_area->udp_pkt_lgth = skb->len; + ppp_priv_area->udp_pkt_src = udp_pkt_src; + memcpy(ppp_priv_area->udp_pkt_data, skb->data, skb->len); + ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_UDP; + ppp_priv_area->protocol = skb->protocol; + udp_pkt_stored = 1; + }else{ + if (skb->len > MAX_LGTH_UDP_MGNT_PKT){ + printk(KERN_INFO "%s: PIPEMON UDP request too long : %i\n", + card->devname, skb->len); + }else{ + printk(KERN_INFO "%s: PIPEMON UPD request already pending\n", + card->devname); + } + ppp_priv_area->udp_pkt_lgth = 0; + } + + if(udp_pkt_src == UDP_PKT_FRM_STACK){ + dev_kfree_skb_any(skb); + }else{ + dev_kfree_skb_any(skb); + } + + return(udp_pkt_stored); +} + + + +/*============================================================================ + * 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, ip_length; + unsigned long ip_temp; + int even_bound = 0; + ppp_udp_pkt_t *p_udp_pkt = (ppp_udp_pkt_t *)data; + + /* Set length of packet */ + len = sizeof(ip_pkt_t)+ + sizeof(udp_pkt_t)+ + sizeof(wp_mgmt_t)+ + sizeof(cblock_t)+ + mbox_len; + + /* fill in UDP reply */ + p_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY; + + /* fill in UDP length */ + udp_length = sizeof(udp_pkt_t)+ + sizeof(wp_mgmt_t)+ + sizeof(cblock_t)+ + mbox_len; + + + /* put it on an even boundary */ + if ( udp_length & 0x0001 ) { + udp_length += 1; + len += 1; + even_bound=1; + } + + temp = (udp_length<<8)|(udp_length>>8); + p_udp_pkt->udp_pkt.udp_length = temp; + + + /* swap UDP ports */ + temp = p_udp_pkt->udp_pkt.udp_src_port; + p_udp_pkt->udp_pkt.udp_src_port = + p_udp_pkt->udp_pkt.udp_dst_port; + p_udp_pkt->udp_pkt.udp_dst_port = temp; + + + /* add UDP pseudo header */ + temp = 0x1100; + *((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound)) = temp; + temp = (udp_length<<8)|(udp_length>>8); + *((unsigned short *)(p_udp_pkt->data+mbox_len+even_bound+2)) = temp; + + /* calculate UDP checksum */ + p_udp_pkt->udp_pkt.udp_checksum = 0; + p_udp_pkt->udp_pkt.udp_checksum = + calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET); + + /* fill in IP length */ + ip_length = udp_length + sizeof(ip_pkt_t); + temp = (ip_length<<8)|(ip_length>>8); + p_udp_pkt->ip_pkt.total_length = temp; + + /* swap IP addresses */ + ip_temp = p_udp_pkt->ip_pkt.ip_src_address; + p_udp_pkt->ip_pkt.ip_src_address = p_udp_pkt->ip_pkt.ip_dst_address; + p_udp_pkt->ip_pkt.ip_dst_address = ip_temp; + + /* fill in IP checksum */ + p_udp_pkt->ip_pkt.hdr_checksum = 0; + p_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t)); + + return len; + +} /* reply_udp */ + +unsigned short calc_checksum (char *data, int len) +{ + unsigned short temp; + unsigned long sum=0; + int i; + + for( i = 0; i <len; 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; + + return temp; +} + +/* + 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 net_device_stats. + */ +static struct net_device_stats *if_stats(struct net_device *dev) +{ + + ppp_private_area_t *ppp_priv_area = dev->priv; + sdla_t* card; + + 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; +} +/*=========================================================================== + * Set Out-Bound Authentication. +*/ +static int ppp_set_outbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area) +{ + ppp_mbox_t *mb = card->mbox; + int err; + + memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); + memset(&mb->data, 0, (strlen(ppp_priv_area->userid) + + strlen(ppp_priv_area->passwd) + 2 ) ); + memcpy(mb->data, ppp_priv_area->userid, strlen(ppp_priv_area->userid)); + memcpy((mb->data + strlen(ppp_priv_area->userid) + 1), + ppp_priv_area->passwd, strlen(ppp_priv_area->passwd)); + + mb->cmd.length = strlen(ppp_priv_area->userid) + + strlen(ppp_priv_area->passwd) + 2 ; + + mb->cmd.command = PPP_SET_OUTBOUND_AUTH; + + err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; + + if (err != CMD_OK) + ppp_error(card, err, mb); + + return err; +} + +/*=========================================================================== + * Set In-Bound Authentication. +*/ +static int ppp_set_inbnd_auth (sdla_t *card, ppp_private_area_t *ppp_priv_area) +{ + ppp_mbox_t *mb = card->mbox; + int err, i; + char* user_tokens[32]; + char* pass_tokens[32]; + int userids, passwds; + int add_ptr; + + memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); + memset(&mb->data, 0, 1008); + memcpy(mb->data, ppp_priv_area->sysname, + strlen(ppp_priv_area->sysname)); + + /* Parse the userid string and the password string and build a string + to copy it to the data area of the command structure. The string + will look like "SYS_NAME<NULL>USER1<NULL>PASS1<NULL>USER2<NULL>PASS2 + ....<NULL> " + */ + userids = tokenize( ppp_priv_area->userid, user_tokens); + passwds = tokenize( ppp_priv_area->passwd, pass_tokens); + + if (userids != passwds){ + printk(KERN_INFO "%s: Number of passwords does not equal the number of user ids\n", card->devname); + return 1; + } + + add_ptr = strlen(ppp_priv_area->sysname) + 1; + for (i=0; i<userids; i++){ + memcpy((mb->data + add_ptr), user_tokens[i], + strlen(user_tokens[i])); + memcpy((mb->data + add_ptr + strlen(user_tokens[i]) + 1), + pass_tokens[i], strlen(pass_tokens[i])); + add_ptr = add_ptr + strlen(user_tokens[i]) + 1 + + strlen(pass_tokens[i]) + 1; + } + + mb->cmd.length = add_ptr + 1; + mb->cmd.command = PPP_SET_INBOUND_AUTH; + + err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; + + if (err != CMD_OK) + ppp_error(card, err, mb); + + return err; +} + + +/*============================================================================ + * Tokenize string. + * Parse a string of the following syntax: + * <arg1>,<arg2>,... + * and fill array of tokens with pointers to string elements. + * + */ +static int tokenize (char *str, char **tokens) +{ + int cnt = 0; + + tokens[0] = strsep(&str, "/"); + while (tokens[cnt] && (cnt < 32 - 1)) + { + tokens[cnt] = strstrip(tokens[cnt], " \t"); + tokens[++cnt] = strsep(&str, "/"); + } + return cnt; +} + +/*============================================================================ + * Strip leading and trailing spaces off the string str. + */ +static char* strstrip (char *str, char* s) +{ + char *eos = str + strlen(str); /* -> end of string */ + + while (*str && strchr(s, *str)) + ++str /* strip leading spaces */ + ; + while ((eos > str) && strchr(s, *(eos - 1))) + --eos /* strip trailing spaces */ + ; + *eos = '\0'; + return str; +} +/*============================================================================ + * Configure PPP firmware. + */ +static int ppp_configure(sdla_t *card, void *data) +{ + ppp_mbox_t *mb = card->mbox; + int data_len = 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 char mode) +{ + ppp_mbox_t *mb = card->mbox; + ppp_intr_info_t *ppp_intr_data = (ppp_intr_info_t *) &mb->data[0]; + int err; + + memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); + ppp_intr_data->i_enable = mode; + + ppp_intr_data->irq = card->hw.irq; + mb->cmd.length = 2; + + /* If timer has been enabled, set the timer delay to 1sec */ + if (mode & 0x80){ + ppp_intr_data->timer_len = 250; //5;//100; //250; + mb->cmd.length = 4; + } + + 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); + else + card->u.p.comm_enabled = 1; + + 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); + else + card->u.p.comm_enabled = 0; + + return err; +} + +static int ppp_comm_disable_shutdown(sdla_t *card) +{ + ppp_mbox_t *mb = card->mbox; + ppp_intr_info_t *ppp_intr_data; + int err; + + if (!mb){ + return 1; + } + + ppp_intr_data = (ppp_intr_info_t *) &mb->data[0]; + + /* Disable all interrupts */ + memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); + ppp_intr_data->i_enable = 0; + + ppp_intr_data->irq = card->hw.irq; + mb->cmd.length = 2; + + mb->cmd.command = PPP_SET_INTR_FLAGS; + err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; + + /* Disable communicatinons */ + memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); + mb->cmd.command = PPP_COMM_DISABLE; + err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; + + card->u.p.comm_enabled = 0; + + return 0; +} + + + +/*============================================================================ + * 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; + + if (txbuf->flag) + return 1; + + sdla_poke(&card->hw, txbuf->buf.ptr, data, len); + + txbuf->length = len; /* frame length */ + + if (proto == htons(ETH_P_IPX)) + txbuf->proto = 0x01; /* protocol ID */ + else + txbuf->proto = 0x00; /* 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; + struct net_device *dev = card->wandev.dev; + int i; + + card->in_isr = 1; + ++card->statistics.isr_entry; + + if (!dev && flags->iflag != PPP_INTR_CMD){ + card->in_isr = 0; + flags->iflag = 0; + return; + } + + if (test_bit(PERI_CRIT, (void*)&card->wandev.critical)) { + card->in_isr = 0; + flags->iflag = 0; + return; + } + + + if(card->hw.type != SDLA_S514){ + if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)) { + ++card->statistics.isr_already_critical; + printk (KERN_INFO "%s: Critical while in ISR!\n", + card->devname); + card->in_isr = 0; + flags->iflag = 0; + return; + } + } + + switch (flags->iflag) { + + case PPP_INTR_RXRDY: /* receive interrupt 0x01 (bit 0)*/ + ++card->statistics.isr_rx; + rx_intr(card); + break; + + case PPP_INTR_TXRDY: /* transmit interrupt 0x02 (bit 1)*/ + ++card->statistics.isr_tx; + flags->imask &= ~PPP_INTR_TXRDY; + netif_wake_queue(dev); + break; + + case PPP_INTR_CMD: /* interface command completed */ + ++Intr_test_counter; + ++card->statistics.isr_intr_test; + break; + + case PPP_INTR_MODEM: /* modem status change (DCD, CTS) 0x04 (bit 2)*/ + case PPP_INTR_DISC: /* Data link disconnected 0x10 (bit 4)*/ + case PPP_INTR_OPEN: /* Data link open 0x20 (bit 5)*/ + case PPP_INTR_DROP_DTR: /* DTR drop timeout expired 0x40 bit 6 */ + event_intr(card); + break; + + case PPP_INTR_TIMER: + timer_intr(card); + 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"); + } + + card->in_isr = 0; + flags->iflag = 0; + return; +} + +/*============================================================================ + * 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; + 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; + + + /* Bug Fix: Mar 6 2000 + * If we get a corrupted mailbox, it means that driver + * is out of sync with the firmware. There is no recovery. + * If we don't turn off all interrupts for this card + * the machine will crash. + */ + printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname); + printk(KERN_INFO "Please contact Sangoma Technologies !\n"); + ppp_set_intr_mode(card,0); + return; + } + + if (dev && netif_running(dev) && dev->priv){ + + 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 */ + 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_PTPIPE_TYPE){ + + /* Handle a UDP Request in Timer Interrupt */ + if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK, card, skb, dev, + ppp_priv_area)){ + flags->imask |= PPP_INTR_TIMER; + } + ++ppp_priv_area->rx_intr_stat.rx_intr_PIPE_request; + + + } else if (handle_IPXWAN(skb->data,card->devname, + ppp_priv_area->enable_IPX, + ppp_priv_area->network_number, + skb->protocol)) { + + /* Handle an IPXWAN packet */ + if( ppp_priv_area->enable_IPX) { + + /* Make sure we are not already sending */ + if (!test_bit(SEND_CRIT, &card->wandev.critical)){ + ppp_send(card, skb->data, skb->len, htons(ETH_P_IPX)); + } + dev_kfree_skb_any(skb); + + } else { + ++card->wandev.stats.rx_dropped; + } + } else { + /* Pass data up the protocol stack */ + skb->dev = dev; + skb->mac.raw = skb->data; + + ++card->wandev.stats.rx_packets; + card->wandev.stats.rx_bytes += skb->len; + ++ppp_priv_area->rx_intr_stat.rx_intr_bfr_passed_to_stack; + netif_rx(skb); + dev->last_rx = jiffies; + } + + } else { + + if (net_ratelimit()){ + printk(KERN_INFO "%s: no socket buffers available!\n", + card->devname); + } + ++card->wandev.stats.rx_dropped; + ++ppp_priv_area->rx_intr_stat.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 = 0x00; + card->rxmb = ++rxbuf; + if ((void*)rxbuf > card->u.p.rxbuf_last) + card->rxmb = card->u.p.rxbuf_base; +} + + +void event_intr (sdla_t *card) +{ + + struct net_device* dev = card->wandev.dev; + ppp_private_area_t* ppp_priv_area = dev->priv; + volatile ppp_flags_t *flags = card->flags; + + switch (flags->iflag){ + + case PPP_INTR_MODEM: /* modem status change (DCD, CTS) 0x04 (bit 2)*/ + + if (net_ratelimit()){ + printk (KERN_INFO "%s: Modem status: DCD=%s CTS=%s\n", + card->devname, DCD(flags->mstatus), CTS(flags->mstatus)); + } + break; + + case PPP_INTR_DISC: /* Data link disconnected 0x10 (bit 4)*/ + + NEX_PRINTK (KERN_INFO "Data link disconnected intr Cause %X\n", + flags->disc_cause); + + if (flags->disc_cause & + (PPP_LOCAL_TERMINATION | PPP_DCD_CTS_DROP | + PPP_REMOTE_TERMINATION)) { + + if (card->u.p.ip_mode == WANOPT_PPP_PEER) { + set_bit(0,&Read_connection_info); + } + wanpipe_set_state(card, WAN_DISCONNECTED); + + show_disc_cause(card, flags->disc_cause); + ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT; + flags->imask |= PPP_INTR_TIMER; + trigger_ppp_poll(dev); + } + break; + + case PPP_INTR_OPEN: /* Data link open 0x20 (bit 5)*/ + + NEX_PRINTK (KERN_INFO "%s: PPP Link Open, LCP=%s IP=%s\n", + card->devname,LCP(flags->lcp_state), + IP(flags->ip_state)); + + if (flags->lcp_state == 0x09 && + (flags->ip_state == 0x09 || flags->ipx_state == 0x09)){ + + /* Initialize the polling timer and set the state + * to WAN_CONNNECTED */ + + + /* BUG FIX: When the protocol restarts, during heavy + * traffic, board tx buffers and driver tx buffers + * can go out of sync. This checks the condition + * and if the tx buffers are out of sync, the + * protocols are restarted. + * I don't know why the board tx buffer is out + * of sync. It could be that a packets is tx + * while the link is down, but that is not + * possible. The other possiblility is that the + * firmware doesn't reinitialize properly. + * FIXME: A better fix should be found. + */ + if (detect_and_fix_tx_bug(card)){ + + ppp_comm_disable(card); + + wanpipe_set_state(card, WAN_DISCONNECTED); + + ppp_priv_area->timer_int_enabled |= + TMR_INT_ENABLED_PPP_EVENT; + flags->imask |= PPP_INTR_TIMER; + break; + } + + card->state_tick = jiffies; + wanpipe_set_state(card, WAN_CONNECTED); + + NEX_PRINTK(KERN_INFO "CON: L Tx: %lx B Tx: %lx || L Rx %lx B Rx %lx\n", + (unsigned long)card->u.p.txbuf, *card->u.p.txbuf_next, + (unsigned long)card->rxmb, *card->u.p.rxbuf_next); + + /* Tell timer interrupt that PPP event occurred */ + ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT; + flags->imask |= PPP_INTR_TIMER; + + /* If we are in PEER mode, we must first obtain the + * IP information and then go into the poll routine */ + if (card->u.p.ip_mode != WANOPT_PPP_PEER){ + trigger_ppp_poll(dev); + } + } + break; + + case PPP_INTR_DROP_DTR: /* DTR drop timeout expired 0x40 bit 6 */ + + NEX_PRINTK(KERN_INFO "DTR Drop Timeout Interrrupt \n"); + + if (card->u.p.ip_mode == WANOPT_PPP_PEER) { + set_bit(0,&Read_connection_info); + } + + wanpipe_set_state(card, WAN_DISCONNECTED); + + show_disc_cause(card, flags->disc_cause); + ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_PPP_EVENT; + flags->imask |= PPP_INTR_TIMER; + trigger_ppp_poll(dev); + break; + + default: + printk(KERN_INFO "%s: Error, Invalid PPP Event\n",card->devname); + } +} + + + +/* TIMER INTERRUPT */ + +void timer_intr (sdla_t *card) +{ + + struct net_device* dev = card->wandev.dev; + ppp_private_area_t* ppp_priv_area = dev->priv; + ppp_flags_t *flags = card->flags; + + + if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG){ + if (!config_ppp(card)){ + ppp_priv_area->timer_int_enabled &= + ~TMR_INT_ENABLED_CONFIG; + } + } + + /* Update statistics */ + if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE){ + ppp_get_err_stats(card); + if(!(--ppp_priv_area->update_comms_stats)){ + ppp_priv_area->timer_int_enabled &= + ~TMR_INT_ENABLED_UPDATE; + } + } + + /* PPIPEMON UDP request */ + + if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP){ + process_udp_mgmt_pkt(card,dev, ppp_priv_area); + ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP; + } + + /* PPP Event */ + if (ppp_priv_area->timer_int_enabled & TMR_INT_ENABLED_PPP_EVENT){ + + if (card->wandev.state == WAN_DISCONNECTED){ + retrigger_comm(card); + } + + /* If the state is CONNECTING, it means that communicatins were + * enabled. When the remote side enables its comminication we + * should get an interrupt PPP_INTR_OPEN, thus turn off polling + */ + + else if (card->wandev.state == WAN_CONNECTING){ + /* Turn off the timer interrupt */ + ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT; + } + + /* If state is connected and we are in PEER mode + * poll for an IP address which will be provided by remote end. + */ + else if ((card->wandev.state == WAN_CONNECTED && + card->u.p.ip_mode == WANOPT_PPP_PEER) && + test_bit(0,&Read_connection_info)){ + + card->state_tick = jiffies; + if (read_connection_info (card)){ + printk(KERN_INFO "%s: Failed to read PEER IP Addresses\n", + card->devname); + }else{ + clear_bit(0,&Read_connection_info); + set_bit(1,&Read_connection_info); + trigger_ppp_poll(dev); + } + }else{ + //FIXME Put the comment back int + ppp_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_PPP_EVENT; + } + + }/* End of PPP_EVENT */ + + + /* Only disable the timer interrupt if there are no udp, statistic */ + /* updates or events pending */ + if(!ppp_priv_area->timer_int_enabled) { + flags->imask &= ~PPP_INTR_TIMER; + } +} + + +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 it's 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 ****************************************/ + +/* All polling functions are invoked by the TIMER interrupt in the wpp_isr + * routine. + */ + +/*============================================================================ + * Monitor active link phase. + */ +static void process_route (sdla_t *card) +{ + ppp_flags_t *flags = card->flags; + struct net_device *dev = card->wandev.dev; + ppp_private_area_t *ppp_priv_area = dev->priv; + + if ((card->u.p.ip_mode == WANOPT_PPP_PEER) && + (flags->ip_state == 0x09)){ + + /* We get ip_local from the firmware in PEER mode. + * Therefore, if ip_local is 0, we failed to obtain + * the remote IP address. */ + if (ppp_priv_area->ip_local == 0) + return; + + printk(KERN_INFO "%s: IPCP State Opened.\n", card->devname); + if (read_info( card )) { + printk(KERN_INFO + "%s: An error occurred in IP assignment.\n", + card->devname); + } else { + struct in_device *in_dev = dev->ip_ptr; + if (in_dev != NULL ) { + struct in_ifaddr *ifa = in_dev->ifa_list; + + printk(KERN_INFO "%s: Assigned Lcl. Addr: %u.%u.%u.%u\n", + card->devname, NIPQUAD(ifa->ifa_local)); + printk(KERN_INFO "%s: Assigned Rmt. Addr: %u.%u.%u.%u\n", + card->devname, NIPQUAD(ifa->ifa_address)); + }else{ + printk(KERN_INFO + "%s: Error: Failed to add a route for PPP interface %s\n", + card->devname,dev->name); + } + } + } +} + +/*============================================================================ + * Monitor physical link disconnected phase. + * o if interface is up and the hold-down timeout has expired, then retry + * connection. + */ +static void retrigger_comm(sdla_t *card) +{ + struct net_device *dev = card->wandev.dev; + + if (dev && ((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 S508 adapter. + */ +static int config508(struct net_device *dev, sdla_t *card) +{ + ppp508_conf_t cfg; + struct in_device *in_dev = dev->ip_ptr; + ppp_private_area_t *ppp_priv_area = dev->priv; + + /* 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 |= INTERFACE_LEVEL_RS232; + + + cfg.conf_flags |= DONT_TERMINATE_LNK_MAX_CONFIG; /*send Configure-Request packets forever*/ + cfg.txbuf_percent = PERCENT_TX_BUFF; /* % of Tx bufs */ + cfg.mtu_local = card->wandev.mtu; + cfg.mtu_remote = card->wandev.mtu; /* Default */ + cfg.restart_tmr = TIME_BETWEEN_CONF_REQ; /* 30 = 3sec */ + cfg.auth_rsrt_tmr = TIME_BETWEEN_PAP_CHAP_REQ; /* 30 = 3sec */ + cfg.auth_wait_tmr = WAIT_PAP_CHAP_WITHOUT_REPLY; /* 300 = 30s */ + cfg.mdm_fail_tmr = WAIT_AFTER_DCD_CTS_LOW; /* 5 = 0.5s */ + cfg.dtr_drop_tmr = TIME_DCD_CTS_LOW_AFTER_LNK_DOWN; /* 10 = 1s */ + cfg.connect_tmout = WAIT_DCD_HIGH_AFTER_ENABLE_COMM; /* 900 = 90s */ + cfg.conf_retry = MAX_CONF_REQ_WITHOUT_REPLY; /* 10 = 1s */ + cfg.term_retry = MAX_TERM_REQ_WITHOUT_REPLY; /* 2 times */ + cfg.fail_retry = NUM_CONF_NAK_WITHOUT_REPLY; /* 5 times */ + cfg.auth_retry = NUM_AUTH_REQ_WITHOUT_REPLY; /* 10 times */ + + + if( !card->u.p.authenticator ) { + printk(KERN_INFO "%s: Device is not configured as an authenticator\n", + card->devname); + cfg.auth_options = NO_AUTHENTICATION; + }else{ + printk(KERN_INFO "%s: Device is configured as an authenticator\n", + card->devname); + cfg.auth_options = INBOUND_AUTH; + } + + if( ppp_priv_area->pap == WANOPT_YES){ + cfg.auth_options |=PAP_AUTH; + printk(KERN_INFO "%s: Pap enabled\n", card->devname); + } + if( ppp_priv_area->chap == WANOPT_YES){ + cfg.auth_options |= CHAP_AUTH; + printk(KERN_INFO "%s: Chap enabled\n", card->devname); + } + + + if (ppp_priv_area->enable_IPX == WANOPT_YES){ + printk(KERN_INFO "%s: Enabling IPX Protocol\n",card->devname); + cfg.ipx_options = ENABLE_IPX | ROUTING_PROT_DEFAULT; + }else{ + cfg.ipx_options = DISABLE_IPX; + } + + switch (card->u.p.ip_mode) { + + case WANOPT_PPP_STATIC: + + printk(KERN_INFO "%s: PPP IP Mode: STATIC\n",card->devname); + cfg.ip_options = L_AND_R_IP_NO_ASSIG | + ENABLE_IP; + cfg.ip_local = in_dev->ifa_list->ifa_local; + cfg.ip_remote = in_dev->ifa_list->ifa_address; + /* Debugging code used to check that IP addresses + * obtained from the kernel are correct */ + + NEX_PRINTK(KERN_INFO "Local %u.%u.%u.%u Remote %u.%u.%u.%u Name %s\n", + NIPQUAD(ip_local),NIPQUAD(ip_remote), dev->name); + break; + + case WANOPT_PPP_HOST: + + printk(KERN_INFO "%s: PPP IP Mode: HOST\n",card->devname); + cfg.ip_options = L_IP_LOCAL_ASSIG | + R_IP_LOCAL_ASSIG | + ENABLE_IP; + cfg.ip_local = in_dev->ifa_list->ifa_local; + cfg.ip_remote = in_dev->ifa_list->ifa_address; + /* Debugging code used to check that IP addresses + * obtained from the kernel are correct */ + NEX_PRINTK (KERN_INFO "Local %u.%u.%u.%u Remote %u.%u.%u.%u Name %s\n", + NIPQUAD(ip_local),NIPQUAD(ip_remote), dev->name); + + break; + + case WANOPT_PPP_PEER: + + printk(KERN_INFO "%s: PPP IP Mode: PEER\n",card->devname); + cfg.ip_options = L_IP_REMOTE_ASSIG | + R_IP_REMOTE_ASSIG | + ENABLE_IP; + cfg.ip_local = 0x00; + cfg.ip_remote = 0x00; + break; + + default: + printk(KERN_INFO "%s: ERROR: Unsupported PPP Mode Selected\n", + card->devname); + printk(KERN_INFO "%s: PPP IP Modes: STATIC, PEER or HOST\n", + card->devname); + return 1; + } + + return ppp_configure(card, &cfg); +} + +/*============================================================================ + * Show disconnection cause. + */ +static void show_disc_cause(sdla_t *card, unsigned cause) +{ + if (cause & 0x0802) + + 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); +} + +/*============================================================================= + * Process UDP call of type PTPIPEAB. + */ +static void process_udp_mgmt_pkt(sdla_t *card, struct net_device *dev, + ppp_private_area_t *ppp_priv_area ) +{ + unsigned char buf2[5]; + unsigned char *buf; + unsigned int frames, len; + struct sk_buff *new_skb; + unsigned short data_length, 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; + ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t*)&ppp_priv_area->udp_pkt_data; + + memcpy(&buf2, &card->wandev.udp_port, 2 ); + + + if(ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) { + + switch(ppp_udp_pkt->cblock.command) { + + case PPIPE_GET_IBA_DATA: + case PPP_READ_CONFIG: + case PPP_GET_CONNECTION_INFO: + case PPIPE_ROUTER_UP_TIME: + case PPP_READ_STATISTICS: + case PPP_READ_ERROR_STATS: + case PPP_READ_PACKET_STATS: + case PPP_READ_LCP_STATS: + case PPP_READ_IPCP_STATS: + case PPP_READ_IPXCP_STATS: + case PPP_READ_PAP_STATS: + case PPP_READ_CHAP_STATS: + case PPP_READ_CODE_VERSION: + udp_mgmt_req_valid = 1; + break; + + default: + udp_mgmt_req_valid = 0; + break; + } + } + + if(!udp_mgmt_req_valid) { + + /* set length to 0 */ + ppp_udp_pkt->cblock.length = 0x00; + + /* set return code */ + ppp_udp_pkt->cblock.result = 0xCD; + ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err; + + if (net_ratelimit()){ + printk(KERN_INFO + "%s: Warning, Illegal UDP command attempted from network: %x\n", + card->devname,ppp_udp_pkt->cblock.command); + } + } else { + /* Initialize the trace element */ + trace_element_t trace_element; + + switch (ppp_udp_pkt->cblock.command){ + + /* PPIPE_ENABLE_TRACING */ + case PPIPE_ENABLE_TRACING: + if (!card->TracingEnabled) { + + /* OPERATE_DATALINE_MONITOR */ + mbox->cmd.command = PPP_DATALINE_MONITOR; + mbox->cmd.length = 0x01; + mbox->data[0] = ppp_udp_pkt->data[0]; + err = sdla_exec(mbox) ? + mbox->cmd.result : CMD_TIMEOUT; + + if (err != CMD_OK) { + + ppp_error(card, err, mbox); + card->TracingEnabled = 0; + + /* set the return code */ + + ppp_udp_pkt->cblock.result = mbox->cmd.result; + mbox->cmd.length = 0; + break; + } + + sdla_peek(&card->hw, 0xC000, &buf2, 2); + + ppp_priv_area->curr_trace_addr = 0; + memcpy(&ppp_priv_area->curr_trace_addr, &buf2, 2); + ppp_priv_area->start_trace_addr = + ppp_priv_area->curr_trace_addr; + ppp_priv_area->end_trace_addr = + ppp_priv_area->start_trace_addr + END_OFFSET; + + /* MAX_SEND_BUFFER_SIZE - 28 (IP header) + - 32 (ppipemon CBLOCK) */ + available_buffer_space = MAX_LGTH_UDP_MGNT_PKT - + sizeof(ip_pkt_t)- + sizeof(udp_pkt_t)- + sizeof(wp_mgmt_t)- + sizeof(cblock_t); + } + ppp_udp_pkt->cblock.result = 0; + mbox->cmd.length = 0; + card->TracingEnabled = 1; + break; + + /* PPIPE_DISABLE_TRACING */ + case PPIPE_DISABLE_TRACING: + + if(card->TracingEnabled) { + + /* OPERATE_DATALINE_MONITOR */ + mbox->cmd.command = 0x33; + mbox->cmd.length = 1; + mbox->data[0] = 0x00; + err = sdla_exec(mbox) ? + mbox->cmd.result : CMD_TIMEOUT; + + } + + /*set return code*/ + ppp_udp_pkt->cblock.result = 0; + mbox->cmd.length = 0; + card->TracingEnabled = 0; + break; + + /* PPIPE_GET_TRACE_INFO */ + case PPIPE_GET_TRACE_INFO: + + if(!card->TracingEnabled) { + /* set return code */ + ppp_udp_pkt->cblock.result = 1; + mbox->cmd.length = 0; + } + + buffer_length = 0; + + /* frames < 62, where 62 is the number of trace + information elements. There is in total 496 + bytes of space and each trace information + element is 8 bytes. + */ + for ( frames=0; frames<62; frames++) { + + trace_pkt_t *trace_pkt = (trace_pkt_t *) + &ppp_udp_pkt->data[buffer_length]; + + /* Read the whole trace packet */ + sdla_peek(&card->hw, ppp_priv_area->curr_trace_addr, + &trace_element, sizeof(trace_element_t)); + + /* no data on board so exit */ + if( trace_element.opp_flag == 0x00 ) + break; + + data_ptr = trace_element.trace_data_ptr; + + /* See if there is actual data on the trace buffer */ + if (data_ptr){ + data_length = trace_element.trace_length; + }else{ + data_length = 0; + ppp_udp_pkt->data[0] |= 0x02; + } + + //FIXME: Do we need this check + if ((available_buffer_space - buffer_length) + < (sizeof(trace_element_t)+1)){ + + /*indicate we have more frames + * on board and exit + */ + ppp_udp_pkt->data[0] |= 0x02; + break; + } + + trace_pkt->status = trace_element.trace_type; + trace_pkt->time_stamp = trace_element.trace_time_stamp; + trace_pkt->real_length = trace_element.trace_length; + + real_len = trace_element.trace_length; + + if(data_ptr == 0){ + trace_pkt->data_avail = 0x00; + }else{ + /* we can take it next time */ + if ((available_buffer_space - buffer_length)< + (real_len + sizeof(trace_pkt_t))){ + + ppp_udp_pkt->data[0] |= 0x02; + break; + } + trace_pkt->data_avail = 0x01; + + /* get the data */ + sdla_peek(&card->hw, data_ptr, + &trace_pkt->data, + real_len); + } + /* zero the opp flag to + show we got the frame */ + buf2[0] = 0x00; + sdla_poke(&card->hw, ppp_priv_area->curr_trace_addr, + &buf2, 1); + + /* now move onto the next + frame */ + ppp_priv_area->curr_trace_addr += 8; + + /* check if we passed the last address */ + if ( ppp_priv_area->curr_trace_addr >= + ppp_priv_area->end_trace_addr){ + + ppp_priv_area->curr_trace_addr = + ppp_priv_area->start_trace_addr; + } + + /* update buffer length and make sure its even */ + + if ( trace_pkt->data_avail == 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 */ + ppp_udp_pkt->data[0] |= (frames << 2); + + /* set the data length */ + mbox->cmd.length = buffer_length; + ppp_udp_pkt->cblock.length = buffer_length; + + /* set return code */ + ppp_udp_pkt->cblock.result = 0; + break; + + /* PPIPE_GET_IBA_DATA */ + case PPIPE_GET_IBA_DATA: + + mbox->cmd.length = 0x09; + + sdla_peek(&card->hw, 0xF003, &ppp_udp_pkt->data, + mbox->cmd.length); + + /* set the length of the data */ + ppp_udp_pkt->cblock.length = 0x09; + + /* set return code */ + ppp_udp_pkt->cblock.result = 0x00; + ppp_udp_pkt->cblock.result = 0; + break; + + /* PPIPE_FT1_READ_STATUS */ + case PPIPE_FT1_READ_STATUS: + sdla_peek(&card->hw, 0xF020, &ppp_udp_pkt->data[0], 2); + ppp_udp_pkt->cblock.length = mbox->cmd.length = 2; + ppp_udp_pkt->cblock.result = 0; + break; + + case PPIPE_FLUSH_DRIVER_STATS: + init_ppp_priv_struct( ppp_priv_area ); + init_global_statistics( card ); + mbox->cmd.length = 0; + ppp_udp_pkt->cblock.result = 0; + break; + + + case PPIPE_ROUTER_UP_TIME: + + do_gettimeofday( &tv ); + ppp_priv_area->router_up_time = tv.tv_sec - + ppp_priv_area->router_start_time; + *(unsigned long *)&ppp_udp_pkt->data = ppp_priv_area->router_up_time; + mbox->cmd.length = 4; + ppp_udp_pkt->cblock.result = 0; + break; + + /* PPIPE_DRIVER_STATISTICS */ + case PPIPE_DRIVER_STAT_IFSEND: + memcpy(&ppp_udp_pkt->data, &ppp_priv_area->if_send_stat, + sizeof(if_send_stat_t)); + + + ppp_udp_pkt->cblock.result = 0; + ppp_udp_pkt->cblock.length = sizeof(if_send_stat_t); + mbox->cmd.length = sizeof(if_send_stat_t); + break; + + case PPIPE_DRIVER_STAT_INTR: + memcpy(&ppp_udp_pkt->data, &card->statistics, + sizeof(global_stats_t)); + + memcpy(&ppp_udp_pkt->data+sizeof(global_stats_t), + &ppp_priv_area->rx_intr_stat, + sizeof(rx_intr_stat_t)); + + ppp_udp_pkt->cblock.result = 0; + ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+ + sizeof(rx_intr_stat_t); + mbox->cmd.length = ppp_udp_pkt->cblock.length; + break; + + case PPIPE_DRIVER_STAT_GEN: + memcpy( &ppp_udp_pkt->data, + &ppp_priv_area->pipe_mgmt_stat, + sizeof(pipe_mgmt_stat_t)); + + memcpy(&ppp_udp_pkt->data+sizeof(pipe_mgmt_stat_t), + &card->statistics, sizeof(global_stats_t)); + + ppp_udp_pkt->cblock.result = 0; + ppp_udp_pkt->cblock.length = sizeof(global_stats_t)+ + sizeof(rx_intr_stat_t); + mbox->cmd.length = ppp_udp_pkt->cblock.length; + break; + + + /* FT1 MONITOR STATUS */ + case FT1_MONITOR_STATUS_CTRL: + + /* Enable FT1 MONITOR STATUS */ + if( ppp_udp_pkt->data[0] == 1) { + + if( rCount++ != 0 ) { + ppp_udp_pkt->cblock.result = 0; + mbox->cmd.length = 1; + break; + } + } + + /* Disable FT1 MONITOR STATUS */ + if( ppp_udp_pkt->data[0] == 0) { + + if( --rCount != 0) { + ppp_udp_pkt->cblock.result = 0; + mbox->cmd.length = 1; + break; + } + } + goto udp_dflt_cmd; + + /* WARNING: FIXME: This should be fixed. + * The FT1 Status Ctrl doesn't have a break + * statment. Thus, no code must be inserted + * HERE: between default and above case statement */ + + default: +udp_dflt_cmd: + + /* it's a board command */ + mbox->cmd.command = ppp_udp_pkt->cblock.command; + mbox->cmd.length = ppp_udp_pkt->cblock.length; + + if(mbox->cmd.length) { + memcpy(&mbox->data,(unsigned char *)ppp_udp_pkt->data, + 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->pipe_mgmt_stat. + UDP_PIPE_mgmt_adptr_cmnd_timeout; + break; + } + + ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK; + + /* copy the result back to our buffer */ + memcpy(&ppp_udp_pkt->cblock,mbox, sizeof(cblock_t)); + + if(mbox->cmd.length) { + memcpy(&ppp_udp_pkt->data,&mbox->data,mbox->cmd.length); + } + + } /* end of switch */ + } /* end of else */ + + /* Fill UDP TTL */ + ppp_udp_pkt->ip_pkt.ttl = card->wandev.ttl; + len = reply_udp(ppp_priv_area->udp_pkt_data, mbox->cmd.length); + + if (ppp_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) { + + /* Make sure we are not already sending */ + if (!test_bit(SEND_CRIT,&card->wandev.critical)){ + ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_adptr; + ppp_send(card,ppp_priv_area->udp_pkt_data,len,ppp_priv_area->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,ppp_priv_area->udp_pkt_data, len); + + ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_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); + dev->last_rx = jiffies; + + } else { + + ++ppp_priv_area->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket; + printk(KERN_INFO "no socket buffers available!\n"); + } + } + + ppp_priv_area->udp_pkt_lgth = 0; + + return; +} + +/*============================================================================= + * Initial the ppp_private_area structure. + */ +static void init_ppp_priv_struct( ppp_private_area_t *ppp_priv_area ) +{ + + memset(&ppp_priv_area->if_send_stat, 0, sizeof(if_send_stat_t)); + memset(&ppp_priv_area->rx_intr_stat, 0, sizeof(rx_intr_stat_t)); + memset(&ppp_priv_area->pipe_mgmt_stat, 0, sizeof(pipe_mgmt_stat_t)); +} + +/*============================================================================ + * Initialize Global Statistics + */ +static void init_global_statistics( sdla_t *card ) +{ + memset(&card->statistics, 0, sizeof(global_stats_t)); +} + +/*============================================================================ + * Initialize Receive and Transmit Buffers. + */ +static void init_ppp_tx_rx_buff( sdla_t *card ) +{ + ppp508_buf_info_t* info; + + if (card->hw.type == SDLA_S514) { + + info = (void*)(card->hw.dpmbase + PPP514_BUF_OFFS); + + card->u.p.txbuf_base = (void*)(card->hw.dpmbase + + info->txb_ptr); + + 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); + + card->u.p.rxbuf_last = (ppp_buf_ctl_t*)card->u.p.rxbuf_base + + (info->rxb_num - 1); + + } else { + + 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.txbuf_next = (unsigned long*)&info->txb_nxt; + card->u.p.rxbuf_next = (unsigned long*)&info->rxb1_ptr; + + 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; + +} + +/*============================================================================= + * Read Connection Information (ie for Remote IP address assginment). + * Called when ppp interface connected. + */ +static int read_info( sdla_t *card ) +{ + struct net_device *dev = card->wandev.dev; + ppp_private_area_t *ppp_priv_area = dev->priv; + int err; + + struct ifreq if_info; + struct sockaddr_in *if_data1, *if_data2; + mm_segment_t fs; + + /* Set Local and remote addresses */ + memset(&if_info, 0, sizeof(if_info)); + strcpy(if_info.ifr_name, dev->name); + + + fs = get_fs(); + set_fs(get_ds()); /* get user space block */ + + /* Change the local and remote ip address of the interface. + * This will also add in the destination route. + */ + if_data1 = (struct sockaddr_in *)&if_info.ifr_addr; + if_data1->sin_addr.s_addr = ppp_priv_area->ip_local; + if_data1->sin_family = AF_INET; + err = devinet_ioctl( SIOCSIFADDR, &if_info ); + if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr; + if_data2->sin_addr.s_addr = ppp_priv_area->ip_remote; + if_data2->sin_family = AF_INET; + err = devinet_ioctl( SIOCSIFDSTADDR, &if_info ); + + set_fs(fs); /* restore old block */ + + if (err) { + printk (KERN_INFO "%s: Adding of route failed: %i\n", + card->devname,err); + printk (KERN_INFO "%s: Local : %u.%u.%u.%u\n", + card->devname,NIPQUAD(ppp_priv_area->ip_local)); + printk (KERN_INFO "%s: Remote: %u.%u.%u.%u\n", + card->devname,NIPQUAD(ppp_priv_area->ip_remote)); + } + return err; +} + +/*============================================================================= + * Remove Dynamic Route. + * Called when ppp interface disconnected. + */ + +static void remove_route( sdla_t *card ) +{ + + struct net_device *dev = card->wandev.dev; + long ip_addr; + int err; + + mm_segment_t fs; + struct ifreq if_info; + struct sockaddr_in *if_data1; + struct in_device *in_dev = dev->ip_ptr; + struct in_ifaddr *ifa = in_dev->ifa_list; + + ip_addr = ifa->ifa_local; + + /* Set Local and remote addresses */ + memset(&if_info, 0, sizeof(if_info)); + strcpy(if_info.ifr_name, dev->name); + + fs = get_fs(); + set_fs(get_ds()); /* get user space block */ + + /* Change the local ip address of the interface to 0. + * This will also delete the destination route. + */ + if_data1 = (struct sockaddr_in *)&if_info.ifr_addr; + if_data1->sin_addr.s_addr = 0; + if_data1->sin_family = AF_INET; + err = devinet_ioctl( SIOCSIFADDR, &if_info ); + + set_fs(fs); /* restore old block */ + + + if (err) { + printk (KERN_INFO "%s: Deleting dynamic route failed %d!\n", + card->devname, err); + return; + }else{ + printk (KERN_INFO "%s: PPP Deleting dynamic route %u.%u.%u.%u successfuly\n", + card->devname, NIPQUAD(ip_addr)); + } + return; +} + +/*============================================================================= + * 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; + + 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 = PPP_READ_CODE_VERSION; + 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; + + 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]; + ppp_udp_pkt_t *ppp_udp_pkt = (ppp_udp_pkt_t *)skb->data; + + sendpacket = skb->data; + memcpy(&buf2, &card->wandev.udp_port, 2); + + if( ppp_udp_pkt->ip_pkt.ver_inet_hdr_length == 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; + +} + +/*============================================================================ + * Check to see if the packet to be transmitted contains a broadcast or + * multicast source IP address. + */ + +static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev, + struct sk_buff *skb) +{ + u32 src_ip_addr; + u32 broadcast_ip_addr = 0; + struct in_device *in_dev; + + /* read the IP source address from the outgoing packet */ + src_ip_addr = *(u32 *)(skb->data + 12); + + /* read the IP broadcast address for the device */ + in_dev = dev->ip_ptr; + if(in_dev != NULL) { + struct in_ifaddr *ifa= in_dev->ifa_list; + if(ifa != NULL) + broadcast_ip_addr = ifa->ifa_broadcast; + else + return 0; + } + + /* check if the IP Source Address is a Broadcast address */ + if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) { + printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n", + card->devname); + return 1; + } + + /* check if the IP Source Address is a Multicast address */ + if((ntohl(src_ip_addr) >= 0xE0000001) && + (ntohl(src_ip_addr) <= 0xFFFFFFFE)) { + printk(KERN_INFO "%s: Multicast Source Address silently discarded\n", + card->devname); + return 1; + } + + return 0; +} + +void s508_lock (sdla_t *card, unsigned long *smp_flags) +{ + spin_lock_irqsave(&card->wandev.lock, *smp_flags); +} + +void s508_unlock (sdla_t *card, unsigned long *smp_flags) +{ + spin_unlock_irqrestore(&card->wandev.lock, *smp_flags); +} + +static int read_connection_info (sdla_t *card) +{ + ppp_mbox_t *mb = card->mbox; + struct net_device *dev = card->wandev.dev; + ppp_private_area_t *ppp_priv_area = dev->priv; + ppp508_connect_info_t *ppp508_connect_info; + int err; + + memset(&mb->cmd, 0, sizeof(ppp_cmd_t)); + mb->cmd.length = 0; + mb->cmd.command = PPP_GET_CONNECTION_INFO; + err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; + + if (err != CMD_OK) { + ppp_error(card, err, mb); + ppp_priv_area->ip_remote = 0; + ppp_priv_area->ip_local = 0; + } + else { + ppp508_connect_info = (ppp508_connect_info_t *)mb->data; + ppp_priv_area->ip_remote = ppp508_connect_info->ip_remote; + ppp_priv_area->ip_local = ppp508_connect_info->ip_local; + + NEX_PRINTK(KERN_INFO "READ CONNECTION GOT IP ADDRESS %x, %x\n", + ppp_priv_area->ip_remote, + ppp_priv_area->ip_local); + } + + return err; +} + +/*=============================================================================== + * config_ppp + * + * Configure the ppp protocol and enable communications. + * + * The if_open function binds this function to the poll routine. + * Therefore, this function will run every time the ppp interface + * is brought up. + * + * If the communications are not enabled, proceed to configure + * the card and enable communications. + * + * If the communications are enabled, it means that the interface + * was shutdown by ether the user or driver. In this case, we + * have to check that the IP addresses have not changed. If + * the IP addresses changed, we have to reconfigure the firmware + * and update the changed IP addresses. Otherwise, just exit. + */ +static int config_ppp (sdla_t *card) +{ + + struct net_device *dev = card->wandev.dev; + ppp_flags_t *flags = card->flags; + ppp_private_area_t *ppp_priv_area = dev->priv; + + if (card->u.p.comm_enabled){ + + if (ppp_priv_area->ip_local_tmp != ppp_priv_area->ip_local || + ppp_priv_area->ip_remote_tmp != ppp_priv_area->ip_remote){ + + /* The IP addersses have changed, we must + * stop the communications and reconfigure + * the card. Reason: the firmware must know + * the local and remote IP addresses. */ + disable_comm(card); + wanpipe_set_state(card, WAN_DISCONNECTED); + printk(KERN_INFO + "%s: IP addresses changed!\n", + card->devname); + printk(KERN_INFO "%s: Restarting communications ...\n", + card->devname); + }else{ + /* IP addresses are the same and the link is up, + * we don't have to do anything here. Therefore, exit */ + return 0; + } + } + + /* Record the new IP addreses */ + ppp_priv_area->ip_local = ppp_priv_area->ip_local_tmp; + ppp_priv_area->ip_remote = ppp_priv_area->ip_remote_tmp; + + if (config508(dev, card)){ + printk(KERN_INFO "%s: Failed to configure PPP device\n", + card->devname); + return 0; + } + + if (ppp_set_intr_mode(card, PPP_INTR_RXRDY| + PPP_INTR_TXRDY| + PPP_INTR_MODEM| + PPP_INTR_DISC | + PPP_INTR_OPEN | + PPP_INTR_DROP_DTR | + PPP_INTR_TIMER)) { + + printk(KERN_INFO "%s: Failed to configure board interrupts !\n", + card->devname); + return 0; + } + + /* Turn off the transmit and timer interrupt */ + flags->imask &= ~(PPP_INTR_TXRDY | PPP_INTR_TIMER) ; + + + /* If you are not the authenticator and any one of the protocol is + * enabled then we call the set_out_bound_authentication. + */ + if ( !card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)) { + if ( ppp_set_outbnd_auth(card, ppp_priv_area) ){ + printk(KERN_INFO "%s: Outbound authentication failed !\n", + card->devname); + return 0; + } + } + + /* If you are the authenticator and any one of the protocol is enabled + * then we call the set_in_bound_authentication. + */ + if (card->u.p.authenticator && (ppp_priv_area->pap || ppp_priv_area->chap)){ + if (ppp_set_inbnd_auth(card, ppp_priv_area)){ + printk(KERN_INFO "%s: Inbound authentication failed !\n", + card->devname); + return 0; + } + } + + /* If we fail to enable communications here it's OK, + * since the DTR timer will cause a disconnected, which + * will retrigger communication in timer_intr() */ + if (ppp_comm_enable(card) == CMD_OK) { + wanpipe_set_state(card, WAN_CONNECTING); + init_ppp_tx_rx_buff(card); + } + + return 0; +} + +/*============================================================ + * ppp_poll + * + * Rationale: + * We cannot manipulate the routing tables, or + * ip addresses withing the interrupt. Therefore + * we must perform such actons outside an interrupt + * at a later time. + * + * Description: + * PPP polling routine, responsible for + * shutting down interfaces upon disconnect + * and adding/removing routes. + * + * Usage: + * This function is executed for each ppp + * interface through a tq_schedule bottom half. + * + * trigger_ppp_poll() function is used to kick + * the ppp_poll routine. + */ +static void ppp_poll(struct net_device *dev) +{ + ppp_private_area_t *ppp_priv_area; + sdla_t *card; + u8 check_gateway=0; + ppp_flags_t *flags; + + if (!dev || (ppp_priv_area = dev->priv) == NULL) + return; + + card = ppp_priv_area->card; + flags = card->flags; + + /* Shutdown is in progress, stop what you are + * doing and get out */ + if (test_bit(PERI_CRIT,&card->wandev.critical)){ + clear_bit(POLL_CRIT,&card->wandev.critical); + return; + } + + /* if_open() function has triggered the polling routine + * to determine the configured IP addresses. Once the + * addresses are found, trigger the chdlc configuration */ + if (test_bit(0,&ppp_priv_area->config_ppp)){ + + ppp_priv_area->ip_local_tmp = get_ip_address(dev,WAN_LOCAL_IP); + ppp_priv_area->ip_remote_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP); + + if (ppp_priv_area->ip_local_tmp == ppp_priv_area->ip_remote_tmp && + card->u.p.ip_mode == WANOPT_PPP_HOST){ + + if (++ppp_priv_area->ip_error > MAX_IP_ERRORS){ + printk(KERN_INFO "\n%s: --- WARNING ---\n", + card->devname); + printk(KERN_INFO "%s: The local IP address is the same as the\n", + card->devname); + printk(KERN_INFO "%s: Point-to-Point IP address.\n", + card->devname); + printk(KERN_INFO "%s: --- WARNING ---\n\n", + card->devname); + }else{ + clear_bit(POLL_CRIT,&card->wandev.critical); + ppp_priv_area->poll_delay_timer.expires = jiffies+HZ; + add_timer(&ppp_priv_area->poll_delay_timer); + return; + } + } + + ppp_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG; + flags->imask |= PPP_INTR_TIMER; + ppp_priv_area->ip_error=0; + + clear_bit(0,&ppp_priv_area->config_ppp); + clear_bit(POLL_CRIT,&card->wandev.critical); + return; + } + + /* Dynamic interface implementation, as well as dynamic + * routing. */ + + switch (card->wandev.state) { + + case WAN_DISCONNECTED: + + /* If the dynamic interface configuration is on, and interface + * is up, then bring down the netowrk interface */ + + if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) && + !test_bit(DEV_DOWN,&ppp_priv_area->interface_down) && + card->wandev.dev->flags & IFF_UP){ + + printk(KERN_INFO "%s: Interface %s down.\n", + card->devname,card->wandev.dev->name); + change_dev_flags(card->wandev.dev, + (card->wandev.dev->flags&~IFF_UP)); + set_bit(DEV_DOWN,&ppp_priv_area->interface_down); + }else{ + /* We need to check if the local IP address is + * zero. If it is, we shouldn't try to remove it. + * For some reason the kernel crashes badly if + * we try to remove the route twice */ + + if (card->wandev.dev->flags & IFF_UP && + get_ip_address(card->wandev.dev,WAN_LOCAL_IP) && + card->u.p.ip_mode == WANOPT_PPP_PEER){ + + remove_route(card); + } + } + break; + + case WAN_CONNECTED: + + /* In SMP machine this code can execute before the interface + * comes up. In this case, we must make sure that we do not + * try to bring up the interface before dev_open() is finished */ + + + /* DEV_DOWN will be set only when we bring down the interface + * for the very first time. This way we know that it was us + * that brought the interface down */ + + if (test_bit(DYN_OPT_ON,&ppp_priv_area->interface_down) && + test_bit(DEV_DOWN, &ppp_priv_area->interface_down) && + !(card->wandev.dev->flags & IFF_UP)){ + + printk(KERN_INFO "%s: Interface %s up.\n", + card->devname,card->wandev.dev->name); + + change_dev_flags(card->wandev.dev,(card->wandev.dev->flags|IFF_UP)); + clear_bit(DEV_DOWN,&ppp_priv_area->interface_down); + check_gateway=1; + } + + if ((card->u.p.ip_mode == WANOPT_PPP_PEER) && + test_bit(1,&Read_connection_info)) { + + process_route(card); + clear_bit(1,&Read_connection_info); + check_gateway=1; + } + + if (ppp_priv_area->gateway && check_gateway) + add_gateway(card,dev); + + break; + } + clear_bit(POLL_CRIT,&card->wandev.critical); + return; +} + +/*============================================================ + * trigger_ppp_poll + * + * Description: + * Add a ppp_poll() task into a tq_scheduler bh handler + * for a specific interface. This will kick + * the ppp_poll() routine at a later time. + * + * Usage: + * Interrupts use this to defer a taks to + * a polling routine. + * + */ + +static void trigger_ppp_poll(struct net_device *dev) +{ + ppp_private_area_t *ppp_priv_area; + if ((ppp_priv_area=dev->priv) != NULL){ + + sdla_t *card = ppp_priv_area->card; + + if (test_bit(PERI_CRIT,&card->wandev.critical)){ + return; + } + + if (test_and_set_bit(POLL_CRIT,&card->wandev.critical)){ + return; + } + + schedule_work(&ppp_priv_area->poll_work); + } + return; +} + +static void ppp_poll_delay (unsigned long dev_ptr) +{ + struct net_device *dev = (struct net_device *)dev_ptr; + trigger_ppp_poll(dev); +} + +/*============================================================ + * detect_and_fix_tx_bug + * + * Description: + * On connect, if the board tx buffer ptr is not the same + * as the driver tx buffer ptr, we found a firmware bug. + * Report the bug to the above layer. To fix the + * error restart communications again. + * + * Usage: + * + */ + +static int detect_and_fix_tx_bug (sdla_t *card) +{ + if (((unsigned long)card->u.p.txbuf_base&0xFFF) != ((*card->u.p.txbuf_next)&0xFFF)){ + NEX_PRINTK(KERN_INFO "Major Error, Fix the bug\n"); + return 1; + } + return 0; +} + +MODULE_LICENSE("GPL"); + +/****** End *****************************************************************/ |