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3422 3423 3424 3425 3426 3427 3428 3429 3430 | /***************************************************************************** * 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 <linux/jiffies.h> /* time_after() macro */ #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 (time_after(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 *****************************************************************/ |