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_ |