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5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545 5546 5547 5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 | /***************************************************************************** * sdla_x25.c WANPIPE(tm) Multiprotocol WAN Link Driver. X.25 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. * ============================================================================ * Apr 03, 2001 Nenad Corbic o Fixed the rx_skb=NULL bug in x25 in rx_intr(). * Dec 26, 2000 Nenad Corbic o Added a new polling routine, that uses * a kernel timer (more efficient). * Dec 25, 2000 Nenad Corbic o Updated for 2.4.X kernel * Jul 26, 2000 Nenad Corbic o Increased the local packet buffering * for API to 4096+header_size. * Jul 17, 2000 Nenad Corbic o Fixed the x25 startup bug. Enable * communications only after all interfaces * come up. HIGH SVC/PVC is used to calculate * the number of channels. * Enable protocol only after all interfaces * are enabled. * Jul 10, 2000 Nenad Corbic o Fixed the M_BIT bug. * Apr 25, 2000 Nenad Corbic o Pass Modem messages to the API. * Disable idle timeout in X25 API. * Apr 14, 2000 Nenad Corbic o Fixed: Large LCN number support. * Maximum LCN number is 4095. * Maximum number of X25 channels is 255. * Apr 06, 2000 Nenad Corbic o Added SMP Support. * Mar 29, 2000 Nenad Corbic o Added support for S514 PCI Card * Mar 23, 2000 Nenad Corbic o Improved task queue, BH handling. * Mar 14, 2000 Nenad Corbic o Updated Protocol Violation handling * routines. Bug Fix. * Mar 10, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery. * Mar 09, 2000 Nenad Corbic o Fixed the auto HDLC bug. * Mar 08, 2000 Nenad Corbic o Fixed LAPB HDLC startup problems. * Application must bring the link up * before tx/rx, and bring the * link down on close(). * Mar 06, 2000 Nenad Corbic o Added an option for logging call setup * information. * Feb 29, 2000 Nenad Corbic o Added support for LAPB HDLC API * Feb 25, 2000 Nenad Corbic o Fixed the modem failure handling. * No Modem OOB message will be passed * to the user. * Feb 21, 2000 Nenad Corbic o Added Xpipemon Debug Support * Dec 30, 1999 Nenad Corbic o Socket based X25API * Sep 17, 1998 Jaspreet Singh o Updates for 2.2.X kernel * Mar 15, 1998 Alan Cox o 2.1.x porting * Dec 19, 1997 Jaspreet Singh o Added multi-channel IPX support * Nov 27, 1997 Jaspreet Singh o Added protection against enabling of irqs * when they are disabled. * Nov 17, 1997 Farhan Thawar o Added IPX support * o Changed if_send() to now buffer packets when * the board is busy * o Removed queueing of packets via the polling * routing * o Changed if_send() critical flags to properly * handle race conditions * Nov 06, 1997 Farhan Thawar o Added support for SVC timeouts * o Changed PVC encapsulation to ETH_P_IP * Jul 21, 1997 Jaspreet Singh o Fixed freeing up of buffers using kfree() * when packets are received. * Mar 11, 1997 Farhan Thawar Version 3.1.1 * o added support for V35 * o changed if_send() to return 0 if * wandev.critical() is true * o free socket buffer in if_send() if * returning 0 * o added support for single '@' address to * accept all incoming calls * o fixed bug in set_chan_state() to disconnect * Jan 15, 1997 Gene Kozin Version 3.1.0 * o implemented exec() entry point * Jan 07, 1997 Gene Kozin Initial version. *****************************************************************************/ /*====================================================== * Includes *=====================================================*/ #include <linux/module.h> #include <linux/version.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/ctype.h> #include <linux/slab.h> /* kmalloc(), kfree() */ #include <linux/wanrouter.h> /* WAN router definitions */ #include <linux/wanpipe.h> /* WANPIPE common user API definitions */ #include <asm/byteorder.h> /* htons(), etc. */ #include <asm/atomic.h> #include <linux/delay.h> /* Experimental delay */ #if defined(LINUX_2_1) || defined(LINUX_2_4) #include <asm/uaccess.h> #else #include <asm/segment.h> #include <net/route.h> #endif #include <linux/if.h> #include <linux/if_arp.h> #include <linux/sdla_x25.h> /* X.25 firmware API definitions */ #include <linux/if_wanpipe_common.h> #include <linux/if_wanpipe.h> /*====================================================== * Defines & Macros *=====================================================*/ #define CMD_OK 0 /* normal firmware return code */ #define CMD_TIMEOUT 0xFF /* firmware command timed out */ #define MAX_CMD_RETRY 10 /* max number of firmware retries */ #define X25_CHAN_MTU 4096 /* unfragmented logical channel MTU */ #define X25_HRDHDR_SZ 7 /* max encapsulation header size */ #define X25_CONCT_TMOUT (90*HZ) /* link connection timeout */ #define X25_RECON_TMOUT (10*HZ) /* link connection timeout */ #define CONNECT_TIMEOUT (90*HZ) /* link connection timeout */ #define HOLD_DOWN_TIME (30*HZ) /* link hold down time */ #define MAX_BH_BUFF 10 #define M_BIT 0x01 //#define PRINT_DEBUG 1 #ifdef PRINT_DEBUG #define DBG_PRINTK(format, a...) printk(format, ## a) #else #define DBG_PRINTK(format, a...) #endif #define TMR_INT_ENABLED_POLL_ACTIVE 0x01 #define TMR_INT_ENABLED_POLL_CONNECT_ON 0x02 #define TMR_INT_ENABLED_POLL_CONNECT_OFF 0x04 #define TMR_INT_ENABLED_POLL_DISCONNECT 0x08 #define TMR_INT_ENABLED_CMD_EXEC 0x10 #define TMR_INT_ENABLED_UPDATE 0x20 #define TMR_INT_ENABLED_UDP_PKT 0x40 #define MAX_X25_ADDR_SIZE 16 #define MAX_X25_DATA_SIZE 129 #define MAX_X25_FACL_SIZE 110 #define TRY_CMD_AGAIN 2 #define DELAY_RESULT 1 #define RETURN_RESULT 0 #define DCD(x) (x & 0x03 ? "HIGH" : "LOW") #define CTS(x) (x & 0x05 ? "HIGH" : "LOW") /* Driver will not write log messages about * modem status if defined.*/ #define MODEM_NOT_LOG 1 /*==================================================== * For 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))) /*==================================================== * MEMORY DEBUGGING FUNCTION *==================================================== #define KMEM_SAFETYZONE 8 static void * dbg_kmalloc(unsigned int size, int prio, int line) { int i = 0; void * v = kmalloc(size+sizeof(unsigned int)+2*KMEM_SAFETYZONE*8,prio); char * c1 = v; c1 += sizeof(unsigned int); *((unsigned int *)v) = size; for (i = 0; i < KMEM_SAFETYZONE; i++) { c1[0] = 'D'; c1[1] = 'E'; c1[2] = 'A'; c1[3] = 'D'; c1[4] = 'B'; c1[5] = 'E'; c1[6] = 'E'; c1[7] = 'F'; c1 += 8; } c1 += size; for (i = 0; i < KMEM_SAFETYZONE; i++) { c1[0] = 'M'; c1[1] = 'U'; c1[2] = 'N'; c1[3] = 'G'; c1[4] = 'W'; c1[5] = 'A'; c1[6] = 'L'; c1[7] = 'L'; c1 += 8; } v = ((char *)v) + sizeof(unsigned int) + KMEM_SAFETYZONE*8; printk(KERN_INFO "line %d kmalloc(%d,%d) = %p\n",line,size,prio,v); return v; } static void dbg_kfree(void * v, int line) { unsigned int * sp = (unsigned int *)(((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8)); unsigned int size = *sp; char * c1 = ((char *)v) - KMEM_SAFETYZONE*8; int i = 0; for (i = 0; i < KMEM_SAFETYZONE; i++) { if ( c1[0] != 'D' || c1[1] != 'E' || c1[2] != 'A' || c1[3] != 'D' || c1[4] != 'B' || c1[5] != 'E' || c1[6] != 'E' || c1[7] != 'F') { printk(KERN_INFO "kmalloced block at %p has been corrupted (underrun)!\n",v); printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8, c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] ); } c1 += 8; } c1 += size; for (i = 0; i < KMEM_SAFETYZONE; i++) { if ( c1[0] != 'M' || c1[1] != 'U' || c1[2] != 'N' || c1[3] != 'G' || c1[4] != 'W' || c1[5] != 'A' || c1[6] != 'L' || c1[7] != 'L' ) { printk(KERN_INFO "kmalloced block at %p has been corrupted (overrun):\n",v); printk(KERN_INFO " %4x: %2x %2x %2x %2x %2x %2x %2x %2x\n", i*8, c1[0],c1[1],c1[2],c1[3],c1[4],c1[5],c1[6],c1[7] ); } c1 += 8; } printk(KERN_INFO "line %d kfree(%p)\n",line,v); v = ((char *)v) - (sizeof(unsigned int) + KMEM_SAFETYZONE*8); kfree(v); } #define kmalloc(x,y) dbg_kmalloc(x,y,__LINE__) #define kfree(x) dbg_kfree(x,__LINE__) ==============================================================*/ /*=============================================== * Data Structures *===============================================*/ /*======================================================== * Name: x25_channel * * Purpose: To hold private informaton for each * logical channel. * * Rationale: Per-channel debugging is possible if each * channel has its own private area. * * Assumptions: * * Description: This is an extention of the 'netdevice_t' * we create for each network interface to keep * the rest of X.25 channel-specific data. * * Construct: Typedef */ typedef struct x25_channel { wanpipe_common_t common; /* common area for x25api and socket */ char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */ char addr[WAN_ADDRESS_SZ+1]; /* media address, ASCIIZ */ unsigned tx_pkt_size; unsigned short protocol; /* ethertype, 0 - multiplexed */ char drop_sequence; /* mark sequence for dropping */ unsigned long state_tick; /* time of the last state change */ unsigned idle_timeout; /* sec, before disconnecting */ unsigned long i_timeout_sofar; /* # of sec's we've been idle */ unsigned hold_timeout; /* sec, before re-connecting */ unsigned long tick_counter; /* counter for transmit time out */ char devtint; /* Weather we should dev_tint() */ struct sk_buff* rx_skb; /* receive socket buffer */ struct sk_buff* tx_skb; /* transmit socket buffer */ bh_data_t *bh_head; /* Circular buffer for x25api_bh */ unsigned long tq_working; volatile int bh_write; volatile int bh_read; atomic_t bh_buff_used; sdla_t* card; /* -> owner */ netdevice_t *dev; /* -> bound devce */ int ch_idx; unsigned char enable_IPX; unsigned long network_number; #if defined(LINUX_2_1) || defined(LINUX_2_4) struct net_device_stats ifstats; /* interface statistics */ #else struct enet_statistics ifstats; #endif unsigned short transmit_length; unsigned short tx_offset; char transmit_buffer[X25_CHAN_MTU+sizeof(x25api_hdr_t)]; if_send_stat_t if_send_stat; rx_intr_stat_t rx_intr_stat; pipe_mgmt_stat_t pipe_mgmt_stat; unsigned long router_start_time; /* Router start time in seconds */ unsigned long router_up_time; } x25_channel_t; /* FIXME Take this out */ #ifdef NEX_OLD_CALL_INFO typedef struct x25_call_info { char dest[17]; PACKED;/* ASCIIZ destination address */ char src[17]; PACKED;/* ASCIIZ source address */ char nuser; PACKED;/* number of user data bytes */ unsigned char user[127]; PACKED;/* user data */ char nfacil; PACKED;/* number of facilities */ struct { unsigned char code; PACKED; unsigned char parm; PACKED; } facil[64]; /* facilities */ } x25_call_info_t; #else typedef struct x25_call_info { char dest[MAX_X25_ADDR_SIZE] PACKED;/* ASCIIZ destination address */ char src[MAX_X25_ADDR_SIZE] PACKED;/* ASCIIZ source address */ unsigned char nuser PACKED; unsigned char user[MAX_X25_DATA_SIZE] PACKED;/* user data */ unsigned char nfacil PACKED; unsigned char facil[MAX_X25_FACL_SIZE] PACKED; unsigned short lcn PACKED; } x25_call_info_t; #endif /*=============================================== * Private Function Prototypes *==============================================*/ /*================================================= * WAN link driver entry points. These are * called by the WAN router module. */ static int update (wan_device_t* wandev); static int new_if (wan_device_t* wandev, netdevice_t* dev, wanif_conf_t* conf); static int del_if (wan_device_t* wandev, netdevice_t* dev); static void disable_comm (sdla_t* card); static void disable_comm_shutdown(sdla_t *card); /*================================================= * WANPIPE-specific entry points */ static int wpx_exec (struct sdla* card, void* u_cmd, void* u_data); static void x25api_bh (netdevice_t *); static int x25api_bh_cleanup (netdevice_t *); static int bh_enqueue (netdevice_t *, struct sk_buff *); /*================================================= * Network device interface */ static int if_init (netdevice_t* dev); static int if_open (netdevice_t* dev); static int if_close (netdevice_t* dev); static int if_header (struct sk_buff* skb, netdevice_t* dev, unsigned short type, void* daddr, void* saddr, unsigned len); static int if_rebuild_hdr (struct sk_buff* skb); static int if_send (struct sk_buff* skb, netdevice_t* dev); static struct net_device_stats *if_stats (netdevice_t* dev); #ifdef LINUX_2_4 static void if_tx_timeout (netdevice_t *dev); #endif /*================================================= * Interrupt handlers */ static void wpx_isr (sdla_t *); static void rx_intr (sdla_t *); static void tx_intr (sdla_t *); static void status_intr (sdla_t *); static void event_intr (sdla_t *); static void spur_intr (sdla_t *); static void timer_intr (sdla_t *); static int tx_intr_send(sdla_t *, netdevice_t *); static netdevice_t * move_dev_to_next (sdla_t *, netdevice_t *); /*================================================= * Background polling routines */ static void wpx_poll (sdla_t* card); static void poll_disconnected (sdla_t* card); static void poll_connecting (sdla_t* card); static void poll_active (sdla_t* card); static void trigger_x25_poll(sdla_t *card); static void x25_timer_routine(unsigned long data); /*================================================= * X.25 firmware interface functions */ static int x25_get_version (sdla_t* card, char* str); static int x25_configure (sdla_t* card, TX25Config* conf); static int hdlc_configure (sdla_t* card, TX25Config* conf); static int set_hdlc_level (sdla_t* card); static int x25_get_err_stats (sdla_t* card); static int x25_get_stats (sdla_t* card); static int x25_set_intr_mode (sdla_t* card, int mode); static int x25_close_hdlc (sdla_t* card); static int x25_open_hdlc (sdla_t* card); static int x25_setup_hdlc (sdla_t* card); static int x25_set_dtr (sdla_t* card, int dtr); static int x25_get_chan_conf (sdla_t* card, x25_channel_t* chan); static int x25_place_call (sdla_t* card, x25_channel_t* chan); static int x25_accept_call (sdla_t* card, int lcn, int qdm); static int x25_clear_call (sdla_t* card, int lcn, int cause, int diagn); static int x25_send (sdla_t* card, int lcn, int qdm, int len, void* buf); static int x25_fetch_events (sdla_t* card); static int x25_error (sdla_t* card, int err, int cmd, int lcn); /*================================================= * X.25 asynchronous event handlers */ static int incoming_call (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); static int call_accepted (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); static int call_cleared (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); static int timeout_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); static int restart_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb); /*================================================= * Miscellaneous functions */ static int connect (sdla_t* card); static int disconnect (sdla_t* card); static netdevice_t* get_dev_by_lcn(wan_device_t* wandev, unsigned lcn); static int chan_connect (netdevice_t* dev); static int chan_disc (netdevice_t* dev); static void set_chan_state (netdevice_t* dev, int state); static int chan_send (netdevice_t* , void* , unsigned, unsigned char); static unsigned char bps_to_speed_code (unsigned long bps); static unsigned int dec_to_uint (unsigned char* str, int len); static unsigned int hex_to_uint (unsigned char*, int); static void parse_call_info (unsigned char*, x25_call_info_t*); static netdevice_t * find_channel(sdla_t *, unsigned); static void bind_lcn_to_dev (sdla_t *, netdevice_t *,unsigned); static void setup_for_delayed_transmit (netdevice_t*, void*, unsigned); /*================================================= * X25 API Functions */ static int wanpipe_pull_data_in_skb (sdla_t *, netdevice_t *, struct sk_buff **); static void timer_intr_exec(sdla_t *, unsigned char); static int execute_delayed_cmd (sdla_t*, netdevice_t *, mbox_cmd_t *,char); static int api_incoming_call (sdla_t*, TX25Mbox *, int); static int alloc_and_init_skb_buf (sdla_t *,struct sk_buff **, int); static void send_delayed_cmd_result(sdla_t *, netdevice_t *dev, TX25Mbox*); static int clear_confirm_event (sdla_t *, TX25Mbox*); static void send_oob_msg (sdla_t *, netdevice_t *, TX25Mbox *); static int timer_intr_cmd_exec(sdla_t *card); static void api_oob_event (sdla_t *card,TX25Mbox *mbox); static int check_bad_command (sdla_t *, netdevice_t *); static int channel_disconnect (sdla_t*, netdevice_t *); static void hdlc_link_down (sdla_t*); /*================================================= * XPIPEMON Functions */ static int process_udp_mgmt_pkt(sdla_t *); static int udp_pkt_type( struct sk_buff *, sdla_t*); static int reply_udp( unsigned char *, unsigned int); static void init_x25_channel_struct( x25_channel_t *); static void init_global_statistics( sdla_t *); static int store_udp_mgmt_pkt(int, char, sdla_t*, netdevice_t *, struct sk_buff *, int); static unsigned short calc_checksum (char *, int); /*================================================= * IPX functions */ static void switch_net_numbers(unsigned char *, unsigned long, unsigned char); static int handle_IPXWAN(unsigned char *, char *, unsigned char , unsigned long , unsigned short ); extern void disable_irq(unsigned int); extern void enable_irq(unsigned int); static void S508_S514_lock(sdla_t *, unsigned long *); static void S508_S514_unlock(sdla_t *, unsigned long *); /*================================================= * Global Variables *=================================================*/ /*================================================= * Public Functions *=================================================*/ /*=================================================================== * wpx_init: X.25 Protocol Initialization routine. * * Purpose: To initialize the protocol/firmware. * * Rationale: This function is called by setup() function, in * sdlamain.c, to dynamically setup the x25 protocol. * This is the first protocol specific function, which * executes once on startup. * * Description: This procedure initializes the x25 firmware and * sets up the mailbox, transmit and receive buffer * pointers. It also initializes all debugging structures * and sets up the X25 environment. * * Sets up hardware options defined by user in [wanpipe#] * section of wanpipe#.conf configuration file. * * At this point adapter is completely initialized * and X.25 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. * * Called by: setup() function in sdlamain.c * * Assumptions: None * * Warnings: None * * Return: 0 o.k. * < 0 failure. */ int wpx_init (sdla_t* card, wandev_conf_t* conf) { union{ char str[80]; TX25Config cfg; } u; /* Verify configuration ID */ if (conf->config_id != WANCONFIG_X25){ printk(KERN_INFO "%s: invalid configuration ID %u!\n", card->devname, conf->config_id) ; return -EINVAL; } /* Initialize protocol-specific fields */ card->mbox = (void*)(card->hw.dpmbase + X25_MBOX_OFFS); card->rxmb = (void*)(card->hw.dpmbase + X25_RXMBOX_OFFS); card->flags = (void*)(card->hw.dpmbase + X25_STATUS_OFFS); /* Initialize for S514 Card */ if(card->hw.type == SDLA_S514) { card->mbox += X25_MB_VECTOR; card->flags += X25_MB_VECTOR; card->rxmb += X25_MB_VECTOR; } /* 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 (x25_get_version(card, NULL) || x25_get_version(card, u.str)) return -EIO; /* X25 firmware can run ether in X25 or LAPB HDLC mode. * Check the user defined option and configure accordingly */ if (conf->u.x25.LAPB_hdlc_only == WANOPT_YES){ if (set_hdlc_level(card) != CMD_OK){ return -EIO; }else{ printk(KERN_INFO "%s: running LAP_B HDLC firmware v%s\n", card->devname, u.str); } card->u.x.LAPB_hdlc = 1; }else{ printk(KERN_INFO "%s: running X.25 firmware v%s\n", card->devname, u.str); card->u.x.LAPB_hdlc = 0; } /* Configure adapter. Here we set resonable defaults, then parse * device configuration structure and set configuration options. * Most configuration options are verified and corrected (if * necessary) since we can't rely on the adapter to do so. */ memset(&u.cfg, 0, sizeof(u.cfg)); u.cfg.t1 = 3; u.cfg.n2 = 10; u.cfg.autoHdlc = 1; /* automatic HDLC connection */ u.cfg.hdlcWindow = 7; u.cfg.pktWindow = 2; u.cfg.station = 1; /* DTE */ u.cfg.options = 0x0090; /* disable D-bit pragmatics */ u.cfg.ccittCompat = 1988; u.cfg.t10t20 = 30; u.cfg.t11t21 = 30; u.cfg.t12t22 = 30; u.cfg.t13t23 = 30; u.cfg.t16t26 = 30; u.cfg.t28 = 30; u.cfg.r10r20 = 5; u.cfg.r12r22 = 5; u.cfg.r13r23 = 5; u.cfg.responseOpt = 1; /* RR's after every packet */ if (card->u.x.LAPB_hdlc){ u.cfg.hdlcMTU = 1027; } if (conf->u.x25.x25_conf_opt){ u.cfg.options = conf->u.x25.x25_conf_opt; } if (conf->clocking != WANOPT_EXTERNAL) u.cfg.baudRate = bps_to_speed_code(conf->bps); if (conf->station != WANOPT_DTE){ u.cfg.station = 0; /* DCE mode */ } if (conf->interface != WANOPT_RS232 ){ u.cfg.hdlcOptions |= 0x80; /* V35 mode */ } /* adjust MTU */ if (!conf->mtu || (conf->mtu >= 1024)) card->wandev.mtu = 1024; else if (conf->mtu >= 512) card->wandev.mtu = 512; else if (conf->mtu >= 256) card->wandev.mtu = 256; else if (conf->mtu >= 128) card->wandev.mtu = 128; else card->wandev.mtu = 64; u.cfg.defPktSize = u.cfg.pktMTU = card->wandev.mtu; if (conf->u.x25.hi_pvc){ card->u.x.hi_pvc = min_t(unsigned int, conf->u.x25.hi_pvc, MAX_LCN_NUM); card->u.x.lo_pvc = min_t(unsigned int, conf->u.x25.lo_pvc, card->u.x.hi_pvc); } if (conf->u.x25.hi_svc){ card->u.x.hi_svc = min_t(unsigned int, conf->u.x25.hi_svc, MAX_LCN_NUM); card->u.x.lo_svc = min_t(unsigned int, conf->u.x25.lo_svc, card->u.x.hi_svc); } /* Figure out the total number of channels to configure */ card->u.x.num_of_ch = 0; if (card->u.x.hi_svc != 0){ card->u.x.num_of_ch = (card->u.x.hi_svc - card->u.x.lo_svc) + 1; } if (card->u.x.hi_pvc != 0){ card->u.x.num_of_ch += (card->u.x.hi_pvc - card->u.x.lo_pvc) + 1; } if (card->u.x.num_of_ch == 0){ printk(KERN_INFO "%s: ERROR, Minimum number of PVC/SVC channels is 1 !\n" "%s: Please set the Lowest/Highest PVC/SVC values !\n", card->devname,card->devname); return -ECHRNG; } u.cfg.loPVC = card->u.x.lo_pvc; u.cfg.hiPVC = card->u.x.hi_pvc; u.cfg.loTwoWaySVC = card->u.x.lo_svc; u.cfg.hiTwoWaySVC = card->u.x.hi_svc; if (conf->u.x25.hdlc_window) u.cfg.hdlcWindow = min_t(unsigned int, conf->u.x25.hdlc_window, 7); if (conf->u.x25.pkt_window) u.cfg.pktWindow = min_t(unsigned int, conf->u.x25.pkt_window, 7); if (conf->u.x25.t1) u.cfg.t1 = min_t(unsigned int, conf->u.x25.t1, 30); if (conf->u.x25.t2) u.cfg.t2 = min_t(unsigned int, conf->u.x25.t2, 29); if (conf->u.x25.t4) u.cfg.t4 = min_t(unsigned int, conf->u.x25.t4, 240); if (conf->u.x25.n2) u.cfg.n2 = min_t(unsigned int, conf->u.x25.n2, 30); if (conf->u.x25.t10_t20) u.cfg.t10t20 = min_t(unsigned int, conf->u.x25.t10_t20,255); if (conf->u.x25.t11_t21) u.cfg.t11t21 = min_t(unsigned int, conf->u.x25.t11_t21,255); if (conf->u.x25.t12_t22) u.cfg.t12t22 = min_t(unsigned int, conf->u.x25.t12_t22,255); if (conf->u.x25.t13_t23) u.cfg.t13t23 = min_t(unsigned int, conf->u.x25.t13_t23,255); if (conf->u.x25.t16_t26) u.cfg.t16t26 = min_t(unsigned int, conf->u.x25.t16_t26, 255); if (conf->u.x25.t28) u.cfg.t28 = min_t(unsigned int, conf->u.x25.t28, 255); if (conf->u.x25.r10_r20) u.cfg.r10r20 = min_t(unsigned int, conf->u.x25.r10_r20,250); if (conf->u.x25.r12_r22) u.cfg.r12r22 = min_t(unsigned int, conf->u.x25.r12_r22,250); if (conf->u.x25.r13_r23) u.cfg.r13r23 = min_t(unsigned int, conf->u.x25.r13_r23,250); if (conf->u.x25.ccitt_compat) u.cfg.ccittCompat = conf->u.x25.ccitt_compat; /* initialize adapter */ if (card->u.x.LAPB_hdlc){ if (hdlc_configure(card, &u.cfg) != CMD_OK) return -EIO; }else{ if (x25_configure(card, &u.cfg) != CMD_OK) return -EIO; } if ((x25_close_hdlc(card) != CMD_OK) || /* close HDLC link */ (x25_set_dtr(card, 0) != CMD_OK)) /* drop DTR */ return -EIO; /* Initialize protocol-specific fields of adapter data space */ card->wandev.bps = conf->bps; card->wandev.interface = conf->interface; card->wandev.clocking = conf->clocking; card->wandev.station = conf->station; card->isr = &wpx_isr; card->poll = NULL; //&wpx_poll; card->disable_comm = &disable_comm; card->exec = &wpx_exec; card->wandev.update = &update; card->wandev.new_if = &new_if; card->wandev.del_if = &del_if; /* WARNING: This function cannot exit with an error * after the change of state */ card->wandev.state = WAN_DISCONNECTED; card->wandev.enable_tx_int = 0; card->irq_dis_if_send_count = 0; card->irq_dis_poll_count = 0; card->u.x.tx_dev = NULL; card->u.x.no_dev = 0; /* Configure for S514 PCI Card */ if (card->hw.type == SDLA_S514) { card->u.x.hdlc_buf_status = (volatile unsigned char *) (card->hw.dpmbase + X25_MB_VECTOR+ X25_MISC_HDLC_BITS); }else{ card->u.x.hdlc_buf_status = (volatile unsigned char *)(card->hw.dpmbase + X25_MISC_HDLC_BITS); } card->u.x.poll_device=NULL; card->wandev.udp_port = conf->udp_port; /* Enable or disable call setup logging */ if (conf->u.x25.logging == WANOPT_YES){ printk(KERN_INFO "%s: Enabling Call Logging.\n", card->devname); card->u.x.logging = 1; }else{ card->u.x.logging = 0; } /* Enable or disable modem status reporting */ if (conf->u.x25.oob_on_modem == WANOPT_YES){ printk(KERN_INFO "%s: Enabling OOB on Modem change.\n", card->devname); card->u.x.oob_on_modem = 1; }else{ card->u.x.oob_on_modem = 0; } init_global_statistics(card); #ifndef LINUX_2_4 card->u.x.x25_poll_task.next = NULL; #endif card->u.x.x25_poll_task.sync=0; card->u.x.x25_poll_task.routine = (void*)(void*)wpx_poll; card->u.x.x25_poll_task.data = card; init_timer(&card->u.x.x25_timer); card->u.x.x25_timer.data = (unsigned long)card; card->u.x.x25_timer.function = x25_timer_routine; return 0; } /*========================================================= * WAN Device Driver Entry Points *========================================================*/ /*============================================================ * Name: update(), Update device status & statistics. * * Purpose: To provide debugging and statitical * information to the /proc file system. * /proc/net/wanrouter/wanpipe# * * Rationale: The /proc file system is used to collect * information about the kernel and drivers. * Using the /proc file system the user * can see exactly what the sangoma drivers are * doing. And in what state they are in. * * Description: Collect all driver statistical information * and pass it to the top laywer. * * Since we have to execute a debugging command, * to obtain firmware statitics, we trigger a * UPDATE function within the timer interrtup. * We wait until the timer update is complete. * Once complete return the appropriate return * code to indicate that the update was successful. * * Called by: device_stat() in wanmain.c * * Assumptions: * * Warnings: This function will degrade the performance * of the router, since it uses the mailbox. * * Return: 0 OK * <0 Failed (or busy). */ static int update (wan_device_t* wandev) { volatile sdla_t* card; TX25Status* status; unsigned long timeout; /* sanity checks */ if ((wandev == NULL) || (wandev->private == NULL)) return -EFAULT; if (wandev->state == WAN_UNCONFIGURED) return -ENODEV; if (test_bit(SEND_CRIT, (void*)&wandev->critical)) return -EAGAIN; if (!wandev->dev) return -ENODEV; card = wandev->private; status = card->flags; card->u.x.timer_int_enabled |= TMR_INT_ENABLED_UPDATE; status->imask |= INTR_ON_TIMER; timeout = jiffies; for (;;){ if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_UPDATE)){ break; } if ((jiffies-timeout) > 1*HZ){ card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE; return -EAGAIN; } } return 0; } /*=================================================================== * Name: new_if * * Purpose: To allocate and initialize resources for a * new logical channel. * * Rationale: A new channel can be added dynamically via * ioctl call. * * Description: Allocate a private channel structure, x25_channel_t. * Parse the user interface options from wanpipe#.conf * configuration file. * Bind the private are into the network device private * area pointer (dev->priv). * Prepare the network device structure for registration. * * Called by: ROUTER_IFNEW Ioctl call, from wanrouter_ioctl() * (wanmain.c) * * Assumptions: None * * Warnings: None * * Return: 0 Ok * <0 Failed (channel will not be created) */ static int new_if (wan_device_t* wandev, netdevice_t* dev, wanif_conf_t* conf) { sdla_t* card = wandev->private; x25_channel_t* chan; int err = 0; if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)){ printk(KERN_INFO "%s: invalid interface name!\n", card->devname); return -EINVAL; } if(card->wandev.new_if_cnt++ > 0 && card->u.x.LAPB_hdlc) { printk(KERN_INFO "%s: Error: Running LAPB HDLC Mode !\n", card->devname); printk(KERN_INFO "%s: Maximum number of network interfaces must be one !\n", card->devname); return -EEXIST; } /* allocate and initialize private data */ chan = kmalloc(sizeof(x25_channel_t), GFP_ATOMIC); if (chan == NULL){ return -ENOMEM; } memset(chan, 0, sizeof(x25_channel_t)); /* Bug Fix: Seg Err on PVC startup * It must be here since bind_lcn_to_dev expects * it bellow */ dev->priv = chan; strcpy(chan->name, conf->name); chan->card = card; chan->dev = dev; chan->common.sk = NULL; chan->common.func = NULL; chan->common.rw_bind = 0; chan->tx_skb = chan->rx_skb = NULL; /* verify media address */ if (conf->addr[0] == '@'){ /* SVC */ chan->common.svc = 1; strncpy(chan->addr, &conf->addr[1], WAN_ADDRESS_SZ); /* Set channel timeouts (default if not specified) */ chan->idle_timeout = (conf->idle_timeout) ? conf->idle_timeout : 90; chan->hold_timeout = (conf->hold_timeout) ? conf->hold_timeout : 10; }else if (is_digit(conf->addr[0])){ /* PVC */ int lcn = dec_to_uint(conf->addr, 0); if ((lcn >= card->u.x.lo_pvc) && (lcn <= card->u.x.hi_pvc)){ bind_lcn_to_dev (card, dev, lcn); }else{ printk(KERN_ERR "%s: PVC %u is out of range on interface %s!\n", wandev->name, lcn, chan->name); err = -EINVAL; } }else{ printk(KERN_ERR "%s: invalid media address on interface %s!\n", wandev->name, chan->name); err = -EINVAL; } if(strcmp(conf->usedby, "WANPIPE") == 0){ printk(KERN_INFO "%s: Running in WANPIPE mode %s\n", wandev->name, chan->name); chan->common.usedby = WANPIPE; chan->protocol = htons(ETH_P_IP); }else if(strcmp(conf->usedby, "API") == 0){ chan->common.usedby = API; printk(KERN_INFO "%s: Running in API mode %s\n", wandev->name, chan->name); chan->protocol = htons(X25_PROT); } if (err){ kfree(chan); dev->priv = NULL; return err; } chan->enable_IPX = conf->enable_IPX; if (chan->enable_IPX) chan->protocol = htons(ETH_P_IPX); if (conf->network_number) chan->network_number = conf->network_number; else chan->network_number = 0xDEADBEEF; /* prepare network device data space for registration */ #ifdef LINUX_2_4 strcpy(dev->name,chan->name); #else dev->name = (char *)kmalloc(strlen(chan->name) + 2, GFP_KERNEL); if(dev->name == NULL) { kfree(chan); dev->priv = NULL; return -ENOMEM; } sprintf(dev->name, "%s", chan->name); #endif dev->init = &if_init; init_x25_channel_struct(chan); return 0; } /*=================================================================== * Name: del_if(), Remove a logical channel. * * Purpose: To dynamically remove a logical channel. * * Rationale: Each logical channel should be dynamically * removable. This functin is called by an * IOCTL_IFDEL ioctl call or shutdown(). * * Description: Do nothing. * * Called by: IOCTL_IFDEL : wanrouter_ioctl() from wanmain.c * shutdown() from sdlamain.c * * Assumptions: * * Warnings: * * Return: 0 Ok. Void function. */ //FIXME Del IF Should be taken out now. static int del_if (wan_device_t* wandev, netdevice_t* dev) { return 0; } /*============================================================ * Name: wpx_exec * * Description: Execute adapter interface command. * This option is currently dissabled. *===========================================================*/ static int wpx_exec (struct sdla* card, void* u_cmd, void* u_data) { return 0; } /*============================================================ * Name: disable_comm * * Description: Disable communications during shutdown. * Dont check return code because there is * nothing we can do about it. * * Warning: Dev and private areas are gone at this point. *===========================================================*/ static void disable_comm(sdla_t* card) { disable_comm_shutdown(card); del_timer(&card->u.x.x25_timer); return; } /*============================================================ * Network Device Interface *===========================================================*/ /*=================================================================== * Name: if_init(), Netowrk Interface Initialization * * Purpose: To initialize a network interface device structure. * * Rationale: During network interface startup, the if_init * is called by the kernel to initialize the * netowrk device structure. Thus a driver * can customze a network device. * * Description: Initialize the netowrk device call back * routines. This is where we tell the kernel * which function to use when it wants to send * via our interface. * Furthermore, we initialize the device flags, * MTU and physical address of the board. * * Called by: Kernel (/usr/src/linux/net/core/dev.c) * (dev->init()) * * Assumptions: None * * Warnings: None * * Return: 0 Ok : Void function. */ static int if_init (netdevice_t* dev) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; wan_device_t* wandev = &card->wandev; #ifdef LINUX_2_0 int i; #endif /* 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; #ifdef LINUX_2_4 dev->tx_timeout = &if_tx_timeout; dev->watchdog_timeo = TX_TIMEOUT; #endif /* Initialize media-specific parameters */ #if defined(LINUX_2_1) || defined(LINUX_2_4) dev->type = ARPHRD_PPP; /* ARP h/w type */ #else dev->family = AF_INET; /* address family */ dev->type = ARPHRD_PPP; /* no x25 type */ #endif dev->flags |= IFF_POINTOPOINT; dev->flags |= IFF_NOARP; if (chan->common.usedby == API){ dev->mtu = X25_CHAN_MTU+sizeof(x25api_hdr_t); }else{ dev->mtu = card->wandev.mtu; } dev->hard_header_len = X25_HRDHDR_SZ; /* media header length */ dev->addr_len = 2; /* hardware address length */ if (!chan->common.svc){ *(unsigned short*)dev->dev_addr = htons(chan->common.lcn); } /* Initialize hardware parameters (just for reference) */ dev->irq = wandev->irq; dev->dma = wandev->dma; dev->base_addr = wandev->ioport; dev->mem_start = (unsigned long)wandev->maddr; dev->mem_end = wandev->maddr + wandev->msize - 1; /* Set transmit buffer queue length */ dev->tx_queue_len = 100; /* Initialize socket buffers */ #if !defined(LINUX_2_1) && !defined(LINUX_2_4) for (i = 0; i < DEV_NUMBUFFS; ++i) skb_queue_head_init(&dev->buffs[i]); #endif /* FIXME Why are we doing this */ set_chan_state(dev, WAN_DISCONNECTED); return 0; } /*=================================================================== * Name: if_open(), Open/Bring up the Netowrk Interface * * Purpose: To bring up a network interface. * * Rationale: * * Description: Open network interface. * o prevent module from unloading by incrementing use count * o if link is disconnected then initiate connection * * Called by: Kernel (/usr/src/linux/net/core/dev.c) * (dev->open()) * * Assumptions: None * * Warnings: None * * Return: 0 Ok * <0 Failur: Interface will not come up. */ static int if_open (netdevice_t* dev) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; struct timeval tv; unsigned long smp_flags; if (is_dev_running(dev)) return -EBUSY; chan->tq_working = 0; /* Initialize the task queue */ #ifndef LINUX_2_4 chan->common.wanpipe_task.next = NULL; #endif chan->common.wanpipe_task.sync = 0; chan->common.wanpipe_task.routine = (void *)(void *)x25api_bh; chan->common.wanpipe_task.data = dev; /* Allocate and initialize BH circular buffer */ /* Add 1 to MAX_BH_BUFF so we don't have test with (MAX_BH_BUFF-1) */ chan->bh_head = kmalloc((sizeof(bh_data_t)*(MAX_BH_BUFF+1)),GFP_ATOMIC); if (chan->bh_head == NULL){ printk(KERN_INFO "%s: ERROR, failed to allocate memory ! BH_BUFFERS !\n", card->devname); return -ENOBUFS; } memset(chan->bh_head,0,(sizeof(bh_data_t)*(MAX_BH_BUFF+1))); atomic_set(&chan->bh_buff_used, 0); /* Increment the number of interfaces */ ++card->u.x.no_dev; wanpipe_open(card); /* LAPB protocol only uses one interface, thus * start the protocol after it comes up. */ if (card->u.x.LAPB_hdlc){ if (card->open_cnt == 1){ TX25Status* status = card->flags; S508_S514_lock(card, &smp_flags); x25_set_intr_mode(card, INTR_ON_TIMER); status->imask &= ~INTR_ON_TIMER; S508_S514_unlock(card, &smp_flags); } }else{ /* X25 can have multiple interfaces thus, start the * protocol once all interfaces are up */ //FIXME: There is a bug here. If interface is //brought down and up, it will try to enable comm. if (card->open_cnt == card->u.x.num_of_ch){ S508_S514_lock(card, &smp_flags); connect(card); S508_S514_unlock(card, &smp_flags); del_timer(&card->u.x.x25_timer); card->u.x.x25_timer.expires=jiffies+HZ; add_timer(&card->u.x.x25_timer); } } /* Device is not up until the we are in connected state */ do_gettimeofday( &tv ); chan->router_start_time = tv.tv_sec; #ifdef LINUX_2_4 netif_start_queue(dev); #else dev->interrupt = 0; dev->tbusy = 0; dev->start = 1; #endif return 0; } /*=================================================================== * Name: if_close(), Close/Bring down the Netowrk Interface * * Purpose: To bring down a network interface. * * Rationale: * * Description: Close network interface. * o decrement use module use count * * Called by: Kernel (/usr/src/linux/net/core/dev.c) * (dev->close()) * ifconfig <name> down: will trigger the kernel * which will call this function. * * Assumptions: None * * Warnings: None * * Return: 0 Ok * <0 Failure: Interface will not exit properly. */ static int if_close (netdevice_t* dev) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; unsigned long smp_flags; stop_net_queue(dev); #ifndef LINUX_2_4 dev->start=0; #endif if ((chan->common.state == WAN_CONNECTED) || (chan->common.state == WAN_CONNECTING)){ S508_S514_lock(card, &smp_flags); chan_disc(dev); S508_S514_unlock(card, &smp_flags); } wanpipe_close(card); S508_S514_lock(card, &smp_flags); if (chan->bh_head){ int i; struct sk_buff *skb; for (i=0; i<(MAX_BH_BUFF+1); i++){ skb = ((bh_data_t *)&chan->bh_head[i])->skb; if (skb != NULL){ wan_dev_kfree_skb(skb, FREE_READ); } } kfree(chan->bh_head); chan->bh_head=NULL; } S508_S514_unlock(card, &smp_flags); /* If this is the last close, disconnect physical link */ if (!card->open_cnt){ S508_S514_lock(card, &smp_flags); disconnect(card); x25_set_intr_mode(card, 0); S508_S514_unlock(card, &smp_flags); } /* Decrement the number of interfaces */ --card->u.x.no_dev; return 0; } /*====================================================================== * Build media header. * o encapsulate packet according to encapsulation type. * * The trick here is to put packet type (Ethertype) into 'protocol' * field of the socket buffer, so that we don't forget it. * If encapsulation fails, set skb->protocol to 0 and discard * packet later. * * Return: media header length. *======================================================================*/ static int if_header (struct sk_buff* skb, netdevice_t* dev, unsigned short type, void* daddr, void* saddr, unsigned len) { x25_channel_t* chan = dev->priv; int hdr_len = dev->hard_header_len; skb->protocol = htons(type); if (!chan->protocol){ hdr_len = wanrouter_encapsulate(skb, dev, type); if (hdr_len < 0){ hdr_len = 0; skb->protocol = htons(0); } } return 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) { netdevice_t *dev = skb->dev; x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n", card->devname, dev->name); return 1; } #ifdef LINUX_2_4 /*============================================================================ * Handle transmit timeout event from netif watchdog */ static void if_tx_timeout (netdevice_t *dev) { x25_channel_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_timeout; printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname, dev->name); netif_wake_queue (dev); } #endif /*========================================================================= * Send a packet on a network interface. * o set tbusy flag (marks start of the transmission). * o check link state. If link is not up, then drop the packet. * o check channel status. If it's down then initiate a call. * o pass a packet to corresponding WAN device. * 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, netdevice_t* dev) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; TX25Status* status = card->flags; int udp_type; unsigned long smp_flags=0; ++chan->if_send_stat.if_send_entry; #ifdef LINUX_2_4 netif_stop_queue(dev); #endif /* No need to check frame length, since socket code * will perform the check for us */ #ifndef LINUX_2_4 if (dev->tbusy){ netdevice_t *dev2; ++chan->if_send_stat.if_send_tbusy; if ((jiffies - chan->tick_counter) < (5*HZ)){ return 1; } printk(KERN_INFO "%s: Transmit time out %s!\n", card->devname, dev->name); for( dev2 = card->wandev.dev; dev2; dev2 = *((netdevice_t**)dev2->priv)){ dev2->tbusy = 0; } ++chan->if_send_stat.if_send_tbusy_timeout; } #endif chan->tick_counter = jiffies; /* Critical region starts here */ S508_S514_lock(card, &smp_flags); if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)){ printk(KERN_INFO "Hit critical in if_send()! %lx\n",card->wandev.critical); goto if_send_crit_exit; } udp_type = udp_pkt_type(skb, card); if(udp_type != UDP_INVALID_TYPE) { if(store_udp_mgmt_pkt(udp_type, UDP_PKT_FRM_STACK, card, dev, skb, chan->common.lcn)) { status->imask |= INTR_ON_TIMER; if (udp_type == UDP_XPIPE_TYPE){ chan->if_send_stat.if_send_PIPE_request++; } } start_net_queue(dev); clear_bit(SEND_CRIT,(void*)&card->wandev.critical); S508_S514_unlock(card, &smp_flags); return 0; } if (chan->transmit_length){ //FIXME: This check doesn't make sense any more if (chan->common.state != WAN_CONNECTED){ chan->transmit_length=0; atomic_set(&chan->common.driver_busy,0); }else{ stop_net_queue(dev); ++card->u.x.tx_interrupts_pending; status->imask |= INTR_ON_TX_FRAME; clear_bit(SEND_CRIT,(void*)&card->wandev.critical); S508_S514_unlock(card, &smp_flags); return 1; } } if (card->wandev.state != WAN_CONNECTED){ ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; ++chan->if_send_stat.if_send_wan_disconnected; }else if ( chan->protocol && (chan->protocol != skb->protocol)){ printk(KERN_INFO "%s: unsupported Ethertype 0x%04X on interface %s!\n", chan->name, htons(skb->protocol), dev->name); printk(KERN_INFO "PROTO %Xn", htons(chan->protocol)); ++chan->ifstats.tx_errors; ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; ++chan->if_send_stat.if_send_protocol_error; }else switch (chan->common.state){ case WAN_DISCONNECTED: /* Try to establish connection. If succeded, then start * transmission, else drop a packet. */ if (chan->common.usedby == API){ ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; break; }else{ if (chan_connect(dev) != 0){ ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; break; } } /* fall through */ case WAN_CONNECTED: if( skb->protocol == htons(ETH_P_IPX)) { if(chan->enable_IPX) { switch_net_numbers( skb->data, chan->network_number, 0); } else { ++card->wandev.stats.tx_dropped; ++chan->ifstats.tx_dropped; ++chan->if_send_stat.if_send_protocol_error; goto if_send_crit_exit; } } /* We never drop here, if cannot send than, copy * a packet into a transmit buffer */ chan_send(dev, skb->data, skb->len, 0); break; default: ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; break; } if_send_crit_exit: wan_dev_kfree_skb(skb, FREE_WRITE); start_net_queue(dev); clear_bit(SEND_CRIT,(void*)&card->wandev.critical); S508_S514_unlock(card, &smp_flags); return 0; } /*============================================================================ * Setup so that a frame can be transmitted on the occurence of a transmit * interrupt. *===========================================================================*/ static void setup_for_delayed_transmit (netdevice_t* dev, void* buf, unsigned len) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; TX25Status* status = card->flags; ++chan->if_send_stat.if_send_adptr_bfrs_full; if(chan->transmit_length) { printk(KERN_INFO "%s: Error, transmit length set in delayed transmit!\n", card->devname); return; } if (chan->common.usedby == API){ if (len > X25_CHAN_MTU+sizeof(x25api_hdr_t)) { ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; printk(KERN_INFO "%s: Length is too big for delayed transmit\n", card->devname); return; } }else{ if (len > X25_MAX_DATA) { ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; printk(KERN_INFO "%s: Length is too big for delayed transmit\n", card->devname); return; } } chan->transmit_length = len; atomic_set(&chan->common.driver_busy,1); memcpy(chan->transmit_buffer, buf, len); ++chan->if_send_stat.if_send_tx_int_enabled; /* Enable Transmit Interrupt */ ++card->u.x.tx_interrupts_pending; status->imask |= INTR_ON_TX_FRAME; } /*=============================================================== * net_device_stats * * Get ethernet-style interface statistics. * Return a pointer to struct enet_statistics. * *==============================================================*/ static struct net_device_stats *if_stats (netdevice_t* dev) { x25_channel_t *chan = dev->priv; if(chan == NULL) return NULL; return &chan->ifstats; } /* * Interrupt Handlers */ /* * X.25 Interrupt Service Routine. */ static void wpx_isr (sdla_t* card) { TX25Status* status = card->flags; card->in_isr = 1; ++card->statistics.isr_entry; if (test_bit(PERI_CRIT,(void*)&card->wandev.critical)){ card->in_isr=0; status->iflags = 0; return; } if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)){ printk(KERN_INFO "%s: wpx_isr: wandev.critical set to 0x%02lx, int type = 0x%02x\n", card->devname, card->wandev.critical, status->iflags); card->in_isr = 0; status->iflags = 0; return; } /* For all interrupts set the critical flag to CRITICAL_RX_INTR. * If the if_send routine is called with this flag set it will set * the enable transmit flag to 1. (for a delayed interrupt) */ switch (status->iflags){ case RX_INTR_PENDING: /* receive interrupt */ rx_intr(card); break; case TX_INTR_PENDING: /* transmit interrupt */ tx_intr(card); break; case MODEM_INTR_PENDING: /* modem status interrupt */ status_intr(card); break; case X25_ASY_TRANS_INTR_PENDING: /* network event interrupt */ event_intr(card); break; case TIMER_INTR_PENDING: timer_intr(card); break; default: /* unwanted interrupt */ spur_intr(card); } card->in_isr = 0; status->iflags = 0; /* clear interrupt condition */ } /* * Receive interrupt handler. * This routine handles fragmented IP packets using M-bit according to the * RFC1356. * o map ligical channel number to network interface. * o allocate socket buffer or append received packet to the existing one. * o if M-bit is reset (i.e. it's the last packet in a sequence) then * decapsulate packet and pass socket buffer to the protocol stack. * * Notes: * 1. When allocating a socket buffer, if M-bit is set then more data is * coming and we have to allocate buffer for the maximum IP packet size * expected on this channel. * 2. If something goes wrong and X.25 packet has to be dropped (e.g. no * socket buffers available) the whole packet sequence must be discarded. */ static void rx_intr (sdla_t* card) { TX25Mbox* rxmb = card->rxmb; unsigned lcn = rxmb->cmd.lcn; netdevice_t* dev = find_channel(card,lcn); x25_channel_t* chan; struct sk_buff* skb=NULL; if (dev == NULL){ /* Invalid channel, discard packet */ printk(KERN_INFO "%s: receiving on orphaned LCN %d!\n", card->devname, lcn); return; } chan = dev->priv; chan->i_timeout_sofar = jiffies; /* Copy the data from the board, into an * skb buffer */ if (wanpipe_pull_data_in_skb(card,dev,&skb)){ ++chan->ifstats.rx_dropped; ++card->wandev.stats.rx_dropped; ++chan->rx_intr_stat.rx_intr_no_socket; ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; return; } dev->last_rx = jiffies; /* timestamp */ /* ------------ API ----------------*/ if (chan->common.usedby == API){ if (bh_enqueue(dev, skb)){ ++chan->ifstats.rx_dropped; ++card->wandev.stats.rx_dropped; ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; wan_dev_kfree_skb(skb, FREE_READ); return; } ++chan->ifstats.rx_packets; #if defined(LINUX_2_1) || defined(LINUX_2_4) chan->ifstats.rx_bytes += skb->len; #endif chan->rx_skb = NULL; if (!test_and_set_bit(0, &chan->tq_working)){ wanpipe_queue_tq(&chan->common.wanpipe_task); wanpipe_mark_bh(); } return; } /* ------------- WANPIPE -------------------*/ /* set rx_skb to NULL so we won't access it later when kernel already owns it */ chan->rx_skb=NULL; /* Decapsulate packet, if necessary */ if (!skb->protocol && !wanrouter_type_trans(skb, dev)){ /* can't decapsulate packet */ wan_dev_kfree_skb(skb, FREE_READ); ++chan->ifstats.rx_errors; ++chan->ifstats.rx_dropped; ++card->wandev.stats.rx_dropped; ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; }else{ if( handle_IPXWAN(skb->data, chan->name, chan->enable_IPX, chan->network_number, skb->protocol)){ if( chan->enable_IPX ){ if(chan_send(dev, skb->data, skb->len,0)){ chan->tx_skb = skb; }else{ wan_dev_kfree_skb(skb, FREE_WRITE); ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; } }else{ /* increment IPX packet dropped statistic */ ++chan->ifstats.rx_dropped; ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; } }else{ skb->mac.raw = skb->data; #if defined(LINUX_2_1) || defined(LINUX_2_4) chan->ifstats.rx_bytes += skb->len; #endif ++chan->ifstats.rx_packets; ++chan->rx_intr_stat.rx_intr_bfr_passed_to_stack; netif_rx(skb); } } return; } static int wanpipe_pull_data_in_skb (sdla_t *card, netdevice_t *dev, struct sk_buff **skb) { void *bufptr; TX25Mbox* rxmb = card->rxmb; unsigned len = rxmb->cmd.length; /* packet length */ unsigned qdm = rxmb->cmd.qdm; /* Q,D and M bits */ x25_channel_t *chan = dev->priv; struct sk_buff *new_skb = *skb; if (chan->common.usedby == WANPIPE){ if (chan->drop_sequence){ if (!(qdm & 0x01)){ chan->drop_sequence = 0; } return 1; } new_skb = chan->rx_skb; }else{ /* Add on the API header to the received * data */ len += sizeof(x25api_hdr_t); } if (new_skb == NULL){ int bufsize; if (chan->common.usedby == WANPIPE){ bufsize = (qdm & 0x01) ? dev->mtu : len; }else{ bufsize = len; } /* Allocate new socket buffer */ new_skb = dev_alloc_skb(bufsize + dev->hard_header_len); if (new_skb == NULL){ printk(KERN_INFO "%s: no socket buffers available!\n", card->devname); chan->drop_sequence = 1; /* set flag */ ++chan->ifstats.rx_dropped; return 1; } } if (skb_tailroom(new_skb) < len){ /* No room for the packet. Call off the whole thing! */ wan_dev_kfree_skb(new_skb, FREE_READ); if (chan->common.usedby == WANPIPE){ chan->rx_skb = NULL; if (qdm & 0x01){ chan->drop_sequence = 1; } } printk(KERN_INFO "%s: unexpectedly long packet sequence " "on interface %s!\n", card->devname, dev->name); ++chan->ifstats.rx_length_errors; return 1; } bufptr = skb_put(new_skb,len); if (chan->common.usedby == API){ /* Fill in the x25api header */ x25api_t * api_data = (x25api_t*)bufptr; api_data->hdr.qdm = rxmb->cmd.qdm; api_data->hdr.cause = rxmb->cmd.cause; api_data->hdr.diagn = rxmb->cmd.diagn; api_data->hdr.length = rxmb->cmd.length; memcpy(api_data->data, rxmb->data, rxmb->cmd.length); }else{ memcpy(bufptr, rxmb->data, len); } new_skb->dev = dev; if (chan->common.usedby == API){ new_skb->mac.raw = new_skb->data; new_skb->protocol = htons(X25_PROT); new_skb->pkt_type = WAN_PACKET_DATA; }else{ new_skb->protocol = chan->protocol; chan->rx_skb = new_skb; } /* If qdm bit is set, more data is coming * thus, exit and wait for more data before * sending the packet up. (Used by router only) */ if ((qdm & 0x01) && (chan->common.usedby == WANPIPE)) return 1; *skb = new_skb; return 0; } /*=============================================================== * tx_intr * * Transmit interrupt handler. * For each dev, check that there is something to send. * If data available, transmit. * *===============================================================*/ static void tx_intr (sdla_t* card) { netdevice_t *dev; TX25Status* status = card->flags; unsigned char more_to_tx=0; x25_channel_t *chan=NULL; int i=0; if (card->u.x.tx_dev == NULL){ card->u.x.tx_dev = card->wandev.dev; } dev = card->u.x.tx_dev; for (;;){ chan = dev->priv; if (chan->transmit_length){ /* Device was set to transmit, check if the TX * buffers are available */ if (chan->common.state != WAN_CONNECTED){ chan->transmit_length = 0; atomic_set(&chan->common.driver_busy,0); chan->tx_offset=0; if (is_queue_stopped(dev)){ if (chan->common.usedby == API){ start_net_queue(dev); wakeup_sk_bh(dev); }else{ wake_net_dev(dev); } } dev = move_dev_to_next(card,dev); break; } if ((status->cflags[chan->ch_idx] & 0x40 || card->u.x.LAPB_hdlc) && (*card->u.x.hdlc_buf_status & 0x40) ){ /* Tx buffer available, we can send */ if (tx_intr_send(card, dev)){ more_to_tx=1; } /* If more than one interface present, move the * device pointer to the next interface, so on the * next TX interrupt we will try sending from it. */ dev = move_dev_to_next(card,dev); break; }else{ /* Tx buffers not available, but device set * the TX interrupt. Set more_to_tx and try * to transmit for other devices. */ more_to_tx=1; dev = move_dev_to_next(card,dev); } }else{ /* This device was not set to transmit, * go to next */ dev = move_dev_to_next(card,dev); } if (++i == card->u.x.no_dev){ if (!more_to_tx){ DBG_PRINTK(KERN_INFO "%s: Nothing to Send in TX INTR\n", card->devname); } break; } } //End of FOR card->u.x.tx_dev = dev; if (!more_to_tx){ /* if any other interfaces have transmit interrupts pending, */ /* do not disable the global transmit interrupt */ if (!(--card->u.x.tx_interrupts_pending)){ status->imask &= ~INTR_ON_TX_FRAME; } } return; } /*=============================================================== * move_dev_to_next * * *===============================================================*/ netdevice_t * move_dev_to_next (sdla_t *card, netdevice_t *dev) { if (card->u.x.no_dev != 1){ if (*((netdevice_t**)dev->priv) == NULL){ return card->wandev.dev; }else{ return *((netdevice_t**)dev->priv); } } return dev; } /*=============================================================== * tx_intr_send * * *===============================================================*/ static int tx_intr_send(sdla_t *card, netdevice_t *dev) { x25_channel_t* chan = dev->priv; if (chan_send (dev,chan->transmit_buffer,chan->transmit_length,1)){ /* Packet was split up due to its size, do not disable * tx_intr */ return 1; } chan->transmit_length=0; atomic_set(&chan->common.driver_busy,0); chan->tx_offset=0; /* If we are in API mode, wakeup the * sock BH handler, not the NET_BH */ if (is_queue_stopped(dev)){ if (chan->common.usedby == API){ start_net_queue(dev); wakeup_sk_bh(dev); }else{ wake_net_dev(dev); } } return 0; } /*=============================================================== * timer_intr * * Timer interrupt handler. * Check who called the timer interrupt and perform * action accordingly. * *===============================================================*/ static void timer_intr (sdla_t *card) { TX25Status* status = card->flags; if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC){ if (timer_intr_cmd_exec(card) == 0){ card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_CMD_EXEC; } }else if(card->u.x.timer_int_enabled & TMR_INT_ENABLED_UDP_PKT) { if ((*card->u.x.hdlc_buf_status & 0x40) && card->u.x.udp_type == UDP_XPIPE_TYPE){ if(process_udp_mgmt_pkt(card)) { card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UDP_PKT; } } }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_ACTIVE) { netdevice_t *dev = card->u.x.poll_device; x25_channel_t *chan = NULL; if (!dev){ card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_ACTIVE; return; } chan = dev->priv; printk(KERN_INFO "%s: Closing down Idle link %s on LCN %d\n", card->devname,chan->name,chan->common.lcn); chan->i_timeout_sofar = jiffies; chan_disc(dev); card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_ACTIVE; card->u.x.poll_device=NULL; }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_CONNECT_ON) { wanpipe_set_state(card, WAN_CONNECTED); if (card->u.x.LAPB_hdlc){ netdevice_t *dev = card->wandev.dev; set_chan_state(dev,WAN_CONNECTED); send_delayed_cmd_result(card,dev,card->mbox); } /* 0x8F enable all interrupts */ x25_set_intr_mode(card, INTR_ON_RX_FRAME| INTR_ON_TX_FRAME| INTR_ON_MODEM_STATUS_CHANGE| //INTR_ON_COMMAND_COMPLETE| X25_ASY_TRANS_INTR_PENDING | INTR_ON_TIMER | DIRECT_RX_INTR_USAGE ); status->imask &= ~INTR_ON_TX_FRAME; /* mask Tx interrupts */ card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_CONNECT_ON; }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_CONNECT_OFF) { //printk(KERN_INFO "Poll connect, Turning OFF\n"); disconnect(card); card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_CONNECT_OFF; }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_POLL_DISCONNECT) { //printk(KERN_INFO "POll disconnect, trying to connect\n"); connect(card); card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_POLL_DISCONNECT; }else if (card->u.x.timer_int_enabled & TMR_INT_ENABLED_UPDATE){ if (*card->u.x.hdlc_buf_status & 0x40){ x25_get_err_stats(card); x25_get_stats(card); card->u.x.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE; } } if(!card->u.x.timer_int_enabled){ //printk(KERN_INFO "Turning Timer Off \n"); status->imask &= ~INTR_ON_TIMER; } } /*==================================================================== * Modem status interrupt handler. *===================================================================*/ static void status_intr (sdla_t* card) { /* Added to avoid Modem status message flooding */ static TX25ModemStatus last_stat; TX25Mbox* mbox = card->mbox; TX25ModemStatus *modem_status; netdevice_t *dev; x25_channel_t *chan; int err; memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_READ_MODEM_STATUS; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err){ x25_error(card, err, X25_READ_MODEM_STATUS, 0); }else{ modem_status = (TX25ModemStatus*)mbox->data; /* Check if the last status was the same * if it was, do NOT print message again */ if (last_stat.status != modem_status->status){ printk(KERN_INFO "%s: Modem Status Change: DCD=%s, CTS=%s\n", card->devname,DCD(modem_status->status),CTS(modem_status->status)); last_stat.status = modem_status->status; if (card->u.x.oob_on_modem){ mbox->cmd.pktType = mbox->cmd.command; mbox->cmd.result = 0x08; /* Send a OOB to all connected sockets */ for (dev = card->wandev.dev; dev; dev = *((netdevice_t**)dev->priv)){ chan=dev->priv; if (chan->common.usedby == API){ send_oob_msg(card,dev,mbox); } } /* The modem OOB message will probably kill the * the link. If we don't clear the flag here, * a deadlock could occur */ if (atomic_read(&card->u.x.command_busy)){ atomic_set(&card->u.x.command_busy,0); } } } } memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_HDLC_LINK_STATUS; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err){ x25_error(card, err, X25_HDLC_LINK_STATUS, 0); } } /*==================================================================== * Network event interrupt handler. *===================================================================*/ static void event_intr (sdla_t* card) { x25_fetch_events(card); } /*==================================================================== * Spurious interrupt handler. * o print a warning * o *====================================================================*/ static void spur_intr (sdla_t* card) { printk(KERN_INFO "%s: spurious interrupt!\n", card->devname); } /* * Background Polling Routines */ /*==================================================================== * Main polling routine. * This routine is repeatedly called by the WANPIPE 'thead' to allow for * time-dependent housekeeping work. * * Notes: * 1. This routine may be called on interrupt context with all interrupts * enabled. Beware! *====================================================================*/ static void wpx_poll (sdla_t *card) { if (!card->wandev.dev){ goto wpx_poll_exit; } if (card->open_cnt != card->u.x.num_of_ch){ goto wpx_poll_exit; } if (test_bit(PERI_CRIT,&card->wandev.critical)){ goto wpx_poll_exit; } if (test_bit(SEND_CRIT,&card->wandev.critical)){ goto wpx_poll_exit; } switch(card->wandev.state){ case WAN_CONNECTED: poll_active(card); break; case WAN_CONNECTING: poll_connecting(card); break; case WAN_DISCONNECTED: poll_disconnected(card); break; } wpx_poll_exit: clear_bit(POLL_CRIT,&card->wandev.critical); return; } static void trigger_x25_poll(sdla_t *card) { #ifdef LINUX_2_4 schedule_task(&card->u.x.x25_poll_task); #else queue_task(&card->u.x.x25_poll_task, &tq_scheduler); #endif } /*==================================================================== * Handle physical link establishment phase. * o if connection timed out, disconnect the link. *===================================================================*/ static void poll_connecting (sdla_t* card) { volatile TX25Status* status = card->flags; if (status->gflags & X25_HDLC_ABM){ timer_intr_exec (card, TMR_INT_ENABLED_POLL_CONNECT_ON); }else if ((jiffies - card->state_tick) > CONNECT_TIMEOUT){ timer_intr_exec (card, TMR_INT_ENABLED_POLL_CONNECT_OFF); } } /*==================================================================== * Handle physical link disconnected phase. * o if hold-down timeout has expired and there are open interfaces, * connect link. *===================================================================*/ static void poll_disconnected (sdla_t* card) { netdevice_t *dev; x25_channel_t *chan; TX25Status* status = card->flags; if (!card->u.x.LAPB_hdlc && card->open_cnt && ((jiffies - card->state_tick) > HOLD_DOWN_TIME)){ timer_intr_exec(card, TMR_INT_ENABLED_POLL_DISCONNECT); } if ((dev=card->wandev.dev) == NULL) return; if ((chan=dev->priv) == NULL) return; if (chan->common.usedby == API && atomic_read(&chan->common.command) && card->u.x.LAPB_hdlc){ if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC)) card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC; if (!(status->imask & INTR_ON_TIMER)) status->imask |= INTR_ON_TIMER; } } /*==================================================================== * Handle active link phase. * o fetch X.25 asynchronous events. * o kick off transmission on all interfaces. *===================================================================*/ static void poll_active (sdla_t* card) { netdevice_t* dev; TX25Status* status = card->flags; for (dev = card->wandev.dev; dev; dev = *((netdevice_t**)dev->priv)){ x25_channel_t* chan = dev->priv; /* If SVC has been idle long enough, close virtual circuit */ if ( chan->common.svc && chan->common.state == WAN_CONNECTED && chan->common.usedby == WANPIPE ){ if( (jiffies - chan->i_timeout_sofar) / HZ > chan->idle_timeout ){ /* Close svc */ card->u.x.poll_device=dev; timer_intr_exec (card, TMR_INT_ENABLED_POLL_ACTIVE); } } #ifdef PRINT_DEBUG chan->ifstats.tx_compressed = atomic_read(&chan->common.command); chan->ifstats.tx_errors = chan->common.state; chan->ifstats.rx_fifo_errors = atomic_read(&card->u.x.command_busy); ++chan->ifstats.tx_bytes; chan->ifstats.rx_fifo_errors=atomic_read(&chan->common.disconnect); chan->ifstats.multicast=atomic_read(&chan->bh_buff_used); chan->ifstats.rx_length_errors=*card->u.x.hdlc_buf_status; #endif if (chan->common.usedby == API && atomic_read(&chan->common.command) && !card->u.x.LAPB_hdlc){ if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC)) card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC; if (!(status->imask & INTR_ON_TIMER)) status->imask |= INTR_ON_TIMER; } if ((chan->common.usedby == API) && atomic_read(&chan->common.disconnect)){ if (chan->common.state == WAN_DISCONNECTED){ atomic_set(&chan->common.disconnect,0); return; } atomic_set(&chan->common.command,X25_CLEAR_CALL); if (!(card->u.x.timer_int_enabled & TMR_INT_ENABLED_CMD_EXEC)) card->u.x.timer_int_enabled |= TMR_INT_ENABLED_CMD_EXEC; if (!(status->imask & INTR_ON_TIMER)) status->imask |= INTR_ON_TIMER; } } } static void timer_intr_exec(sdla_t *card, unsigned char TYPE) { TX25Status* status = card->flags; card->u.x.timer_int_enabled |= TYPE; if (!(status->imask & INTR_ON_TIMER)) status->imask |= INTR_ON_TIMER; } /*==================================================================== * SDLA Firmware-Specific Functions * * Almost all X.25 commands can unexpetedly fail due to so called 'X.25 * asynchronous events' such as restart, interrupt, incoming call request, * call clear request, etc. They can't be ignored and have to be delt with * immediately. To tackle with this problem we execute each interface * command in a loop until good return code is received or maximum number * of retries is reached. Each interface command returns non-zero return * code, an asynchronous event/error handler x25_error() is called. *====================================================================*/ /*==================================================================== * Read X.25 firmware version. * Put code version as ASCII string in str. *===================================================================*/ static int x25_get_version (sdla_t* card, char* str) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_READ_CODE_VERSION; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_READ_CODE_VERSION, 0)); if (!err && str) { int len = mbox->cmd.length; memcpy(str, mbox->data, len); str[len] = '\0'; } return err; } /*==================================================================== * Configure adapter. *===================================================================*/ static int x25_configure (sdla_t* card, TX25Config* conf) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do{ memset(&mbox->cmd, 0, sizeof(TX25Cmd)); memcpy(mbox->data, (void*)conf, sizeof(TX25Config)); mbox->cmd.length = sizeof(TX25Config); mbox->cmd.command = X25_SET_CONFIGURATION; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_SET_CONFIGURATION, 0)); return err; } /*==================================================================== * Configure adapter for HDLC only. *===================================================================*/ static int hdlc_configure (sdla_t* card, TX25Config* conf) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do{ memset(&mbox->cmd, 0, sizeof(TX25Cmd)); memcpy(mbox->data, (void*)conf, sizeof(TX25Config)); mbox->cmd.length = sizeof(TX25Config); mbox->cmd.command = X25_HDLC_SET_CONFIG; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_SET_CONFIGURATION, 0)); return err; } static int set_hdlc_level (sdla_t* card) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do{ memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = SET_PROTOCOL_LEVEL; mbox->cmd.length = 1; mbox->data[0] = HDLC_LEVEL; //| DO_HDLC_LEVEL_ERROR_CHECKING; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, SET_PROTOCOL_LEVEL, 0)); return err; } /*==================================================================== * Get communications error statistics. *====================================================================*/ static int x25_get_err_stats (sdla_t* card) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_HDLC_READ_COMM_ERR; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_HDLC_READ_COMM_ERR, 0)); if (!err) { THdlcCommErr* stats = (void*)mbox->data; card->wandev.stats.rx_over_errors = stats->rxOverrun; card->wandev.stats.rx_crc_errors = stats->rxBadCrc; card->wandev.stats.rx_missed_errors = stats->rxAborted; card->wandev.stats.tx_aborted_errors = stats->txAborted; } return err; } /*==================================================================== * Get protocol statistics. *===================================================================*/ static int x25_get_stats (sdla_t* card) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_READ_STATISTICS; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_READ_STATISTICS, 0)) ; if (!err) { TX25Stats* stats = (void*)mbox->data; card->wandev.stats.rx_packets = stats->rxData; card->wandev.stats.tx_packets = stats->txData; } return err; } /*==================================================================== * Close HDLC link. *===================================================================*/ static int x25_close_hdlc (sdla_t* card) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_HDLC_LINK_CLOSE; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_CLOSE, 0)); return err; } /*==================================================================== * Open HDLC link. *===================================================================*/ static int x25_open_hdlc (sdla_t* card) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_HDLC_LINK_OPEN; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_OPEN, 0)); return err; } /*===================================================================== * Setup HDLC link. *====================================================================*/ static int x25_setup_hdlc (sdla_t* card) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_HDLC_LINK_SETUP; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_SETUP, 0)); return err; } /*==================================================================== * Set (raise/drop) DTR. *===================================================================*/ static int x25_set_dtr (sdla_t* card, int dtr) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->data[0] = 0; mbox->data[2] = 0; mbox->data[1] = dtr ? 0x02 : 0x01; mbox->cmd.length = 3; mbox->cmd.command = X25_SET_GLOBAL_VARS; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_SET_GLOBAL_VARS, 0)); return err; } /*==================================================================== * Set interrupt mode. *===================================================================*/ static int x25_set_intr_mode (sdla_t* card, int mode) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->data[0] = mode; if (card->hw.fwid == SFID_X25_508){ mbox->data[1] = card->hw.irq; mbox->data[2] = 2; mbox->cmd.length = 3; }else { mbox->cmd.length = 1; } mbox->cmd.command = X25_SET_INTERRUPT_MODE; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_SET_INTERRUPT_MODE, 0)); return err; } /*==================================================================== * Read X.25 channel configuration. *===================================================================*/ static int x25_get_chan_conf (sdla_t* card, x25_channel_t* chan) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int lcn = chan->common.lcn; int err; do{ memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.lcn = lcn; mbox->cmd.command = X25_READ_CHANNEL_CONFIG; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_READ_CHANNEL_CONFIG, lcn)); if (!err) { TX25Status* status = card->flags; /* calculate an offset into the array of status bytes */ if (card->u.x.hi_svc <= X25_MAX_CHAN){ chan->ch_idx = lcn - 1; }else{ int offset; /* FIX: Apr 14 2000 : Nenad Corbic * The data field was being compared to 0x1F using * '&&' instead of '&'. * This caused X25API to fail for LCNs greater than 255. */ switch (mbox->data[0] & 0x1F) { case 0x01: offset = status->pvc_map; break; case 0x03: offset = status->icc_map; break; case 0x07: offset = status->twc_map; break; case 0x0B: offset = status->ogc_map; break; default: offset = 0; } chan->ch_idx = lcn - 1 - offset; } /* get actual transmit packet size on this channel */ switch(mbox->data[1] & 0x38) { case 0x00: chan->tx_pkt_size = 16; break; case 0x08: chan->tx_pkt_size = 32; break; case 0x10: chan->tx_pkt_size = 64; break; case 0x18: chan->tx_pkt_size = 128; break; case 0x20: chan->tx_pkt_size = 256; break; case 0x28: chan->tx_pkt_size = 512; break; case 0x30: chan->tx_pkt_size = 1024; break; } if (card->u.x.logging) printk(KERN_INFO "%s: X.25 packet size on LCN %d is %d.\n", card->devname, lcn, chan->tx_pkt_size); } return err; } /*==================================================================== * Place X.25 call. *====================================================================*/ static int x25_place_call (sdla_t* card, x25_channel_t* chan) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; char str[64]; if (chan->protocol == htons(ETH_P_IP)){ sprintf(str, "-d%s -uCC", chan->addr); }else if (chan->protocol == htons(ETH_P_IPX)){ sprintf(str, "-d%s -u800000008137", chan->addr); } do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); strcpy(mbox->data, str); mbox->cmd.length = strlen(str); mbox->cmd.command = X25_PLACE_CALL; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_PLACE_CALL, 0)); if (!err){ bind_lcn_to_dev (card, chan->dev, mbox->cmd.lcn); } return err; } /*==================================================================== * Accept X.25 call. *====================================================================*/ static int x25_accept_call (sdla_t* card, int lcn, int qdm) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.lcn = lcn; mbox->cmd.qdm = qdm; mbox->cmd.command = X25_ACCEPT_CALL; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_ACCEPT_CALL, lcn)); return err; } /*==================================================================== * Clear X.25 call. *====================================================================*/ static int x25_clear_call (sdla_t* card, int lcn, int cause, int diagn) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.lcn = lcn; mbox->cmd.cause = cause; mbox->cmd.diagn = diagn; mbox->cmd.command = X25_CLEAR_CALL; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_CLEAR_CALL, lcn)); return err; } /*==================================================================== * Send X.25 data packet. *====================================================================*/ static int x25_send (sdla_t* card, int lcn, int qdm, int len, void* buf) { TX25Mbox* mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; unsigned char cmd; if (card->u.x.LAPB_hdlc) cmd = X25_HDLC_WRITE; else cmd = X25_WRITE; do { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); memcpy(mbox->data, buf, len); mbox->cmd.length = len; mbox->cmd.lcn = lcn; if (card->u.x.LAPB_hdlc){ mbox->cmd.pf = qdm; }else{ mbox->cmd.qdm = qdm; } mbox->cmd.command = cmd; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, cmd , lcn)); /* If buffers are busy the return code for LAPB HDLC is * 1. The above functions are looking for return code * of X25RES_NOT_READY if busy. */ if (card->u.x.LAPB_hdlc && err == 1){ err = X25RES_NOT_READY; } return err; } /*==================================================================== * Fetch X.25 asynchronous events. *===================================================================*/ static int x25_fetch_events (sdla_t* card) { TX25Status* status = card->flags; TX25Mbox* mbox = card->mbox; int err = 0; if (status->gflags & 0x20) { memset(&mbox->cmd, 0, sizeof(TX25Cmd)); mbox->cmd.command = X25_IS_DATA_AVAILABLE; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err) x25_error(card, err, X25_IS_DATA_AVAILABLE, 0); } return err; } /*==================================================================== * X.25 asynchronous event/error handler. * This routine is called each time interface command returns * non-zero return code to handle X.25 asynchronous events and * common errors. Return non-zero to repeat command or zero to * cancel it. * * Notes: * 1. This function may be called recursively, as handling some of the * asynchronous events (e.g. call request) requires execution of the * interface command(s) that, in turn, may also return asynchronous * events. To avoid re-entrancy problems we copy mailbox to dynamically * allocated memory before processing events. *====================================================================*/ static int x25_error (sdla_t* card, int err, int cmd, int lcn) { int retry = 1; unsigned dlen = ((TX25Mbox*)card->mbox)->cmd.length; TX25Mbox* mb; mb = kmalloc(sizeof(TX25Mbox) + dlen, GFP_ATOMIC); if (mb == NULL) { printk(KERN_ERR "%s: x25_error() out of memory!\n", card->devname); return 0; } memcpy(mb, card->mbox, sizeof(TX25Mbox) + dlen); switch (err){ case X25RES_ASYNC_PACKET: /* X.25 asynchronous packet was received */ mb->data[dlen] = '\0'; switch (mb->cmd.pktType & 0x7F){ case ASE_CALL_RQST: /* incoming call */ retry = incoming_call(card, cmd, lcn, mb); break; case ASE_CALL_ACCEPTED: /* connected */ retry = call_accepted(card, cmd, lcn, mb); break; case ASE_CLEAR_RQST: /* call clear request */ retry = call_cleared(card, cmd, lcn, mb); break; case ASE_RESET_RQST: /* reset request */ printk(KERN_INFO "%s: X.25 reset request on LCN %d! " "Cause:0x%02X Diagn:0x%02X\n", card->devname, mb->cmd.lcn, mb->cmd.cause, mb->cmd.diagn); api_oob_event (card,mb); break; case ASE_RESTART_RQST: /* restart request */ retry = restart_event(card, cmd, lcn, mb); break; case ASE_CLEAR_CONFRM: if (clear_confirm_event (card,mb)) break; /* I use the goto statement here so if * somebody inserts code between the * case and default, we will not have * ghost problems */ goto dflt_1; default: dflt_1: printk(KERN_INFO "%s: X.25 event 0x%02X on LCN %d! " "Cause:0x%02X Diagn:0x%02X\n", card->devname, mb->cmd.pktType, mb->cmd.lcn, mb->cmd.cause, mb->cmd.diagn); } break; case X25RES_PROTO_VIOLATION: /* X.25 protocol violation indication */ /* Bug Fix: Mar 14 2000 * The Protocol violation error conditions were * not handeled previously */ switch (mb->cmd.pktType & 0x7F){ case PVE_CLEAR_RQST: /* Clear request */ retry = call_cleared(card, cmd, lcn, mb); break; case PVE_RESET_RQST: /* Reset request */ printk(KERN_INFO "%s: X.25 reset request on LCN %d! " "Cause:0x%02X Diagn:0x%02X\n", card->devname, mb->cmd.lcn, mb->cmd.cause, mb->cmd.diagn); api_oob_event (card,mb); break; case PVE_RESTART_RQST: /* Restart request */ retry = restart_event(card, cmd, lcn, mb); break; default : printk(KERN_INFO "%s: X.25 protocol violation on LCN %d! " "Packet:0x%02X Cause:0x%02X Diagn:0x%02X\n", card->devname, mb->cmd.lcn, mb->cmd.pktType & 0x7F, mb->cmd.cause, mb->cmd.diagn); api_oob_event(card,mb); } break; case 0x42: /* X.25 timeout */ retry = timeout_event(card, cmd, lcn, mb); break; case 0x43: /* X.25 retry limit exceeded */ printk(KERN_INFO "%s: exceeded X.25 retry limit on LCN %d! " "Packet:0x%02X Diagn:0x%02X\n", card->devname, mb->cmd.lcn, mb->cmd.pktType, mb->cmd.diagn) ; break; case 0x08: /* modem failure */ #ifndef MODEM_NOT_LOG printk(KERN_INFO "%s: modem failure!\n", card->devname); #endif /* MODEM_NOT_LOG */ api_oob_event(card,mb); break; case 0x09: /* N2 retry limit */ printk(KERN_INFO "%s: exceeded HDLC retry limit!\n", card->devname); api_oob_event(card,mb); break; case 0x06: /* unnumbered frame was received while in ABM */ printk(KERN_INFO "%s: received Unnumbered frame 0x%02X!\n", card->devname, mb->data[0]); api_oob_event(card,mb); break; case CMD_TIMEOUT: printk(KERN_ERR "%s: command 0x%02X timed out!\n", card->devname, cmd) ; retry = 0; /* abort command */ break; case X25RES_NOT_READY: retry = 1; break; case 0x01: if (card->u.x.LAPB_hdlc) break; if (mb->cmd.command == 0x16) break; /* I use the goto statement here so if * somebody inserts code between the * case and default, we will not have * ghost problems */ goto dflt_2; default: dflt_2: printk(KERN_INFO "%s: command 0x%02X returned 0x%02X! Lcn %i\n", card->devname, cmd, err, mb->cmd.lcn) ; retry = 0; /* abort command */ } kfree(mb); return retry; } /*==================================================================== * X.25 Asynchronous Event Handlers * These functions are called by the x25_error() and should return 0, if * the command resulting in the asynchronous event must be aborted. *====================================================================*/ /*==================================================================== *Handle X.25 incoming call request. * RFC 1356 establishes the following rules: * 1. The first octet in the Call User Data (CUD) field of the call * request packet contains NLPID identifying protocol encapsulation * 2. Calls MUST NOT be accepted unless router supports requested * protocol encapsulation. * 3. A diagnostic code 249 defined by ISO/IEC 8208 may be used * when clearing a call because protocol encapsulation is not * supported. * 4. If an incoming call is received while a call request is * pending (i.e. call collision has occured), the incoming call * shall be rejected and call request shall be retried. *====================================================================*/ static int incoming_call (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) { wan_device_t* wandev = &card->wandev; int new_lcn = mb->cmd.lcn; netdevice_t* dev = get_dev_by_lcn(wandev, new_lcn); x25_channel_t* chan = NULL; int accept = 0; /* set to '1' if o.k. to accept call */ unsigned int user_data; x25_call_info_t* info; /* Make sure there is no call collision */ if (dev != NULL) { printk(KERN_INFO "%s: X.25 incoming call collision on LCN %d!\n", card->devname, new_lcn); x25_clear_call(card, new_lcn, 0, 0); return 1; } /* Make sure D bit is not set in call request */ //FIXME: THIS IS NOT TURE !!!! TAKE IT OUT // if (mb->cmd.qdm & 0x02) // { // printk(KERN_INFO // "%s: X.25 incoming call on LCN %d with D-bit set!\n", // card->devname, new_lcn); // // x25_clear_call(card, new_lcn, 0, 0); // return 1; // } /* Parse call request data */ info = kmalloc(sizeof(x25_call_info_t), GFP_ATOMIC); if (info == NULL) { printk(KERN_ERR "%s: not enough memory to parse X.25 incoming call " "on LCN %d!\n", card->devname, new_lcn); x25_clear_call(card, new_lcn, 0, 0); return 1; } parse_call_info(mb->data, info); if (card->u.x.logging) printk(KERN_INFO "\n%s: X.25 incoming call on LCN %d!\n", card->devname, new_lcn); /* Conver the first two ASCII characters into an * interger. Used to check the incoming protocol */ user_data = hex_to_uint(info->user,2); /* Find available channel */ for (dev = wandev->dev; dev; dev = *((netdevice_t**)dev->priv)){ chan = dev->priv; if (chan->common.usedby == API) continue; if (!chan->common.svc || (chan->common.state != WAN_DISCONNECTED)) continue; if (user_data == NLPID_IP && chan->protocol != htons(ETH_P_IP)){ printk(KERN_INFO "IP packet but configured for IPX : %x, %x\n", htons(chan->protocol), info->user[0]); continue; } if (user_data == NLPID_SNAP && chan->protocol != htons(ETH_P_IPX)){ printk(KERN_INFO "IPX packet but configured for IP: %x\n", htons(chan->protocol)); continue; } if (strcmp(info->src, chan->addr) == 0) break; /* If just an '@' is specified, accept all incoming calls */ if (strcmp(chan->addr, "") == 0) break; } if (dev == NULL){ /* If the call is not for any WANPIPE interfaces * check to see if there is an API listening queue * waiting for data. If there is send the packet * up the stack. */ if (card->sk != NULL && card->func != NULL){ if (api_incoming_call(card,mb,new_lcn)){ x25_clear_call(card, new_lcn, 0, 0); } accept = 0; }else{ printk(KERN_INFO "%s: no channels available!\n", card->devname); x25_clear_call(card, new_lcn, 0, 0); } }else if (info->nuser == 0){ printk(KERN_INFO "%s: no user data in incoming call on LCN %d!\n", card->devname, new_lcn) ; x25_clear_call(card, new_lcn, 0, 0); }else switch (info->user[0]){ case 0: /* multiplexed */ chan->protocol = htons(0); accept = 1; break; case NLPID_IP: /* IP datagrams */ accept = 1; break; case NLPID_SNAP: /* IPX datagrams */ accept = 1; break; default: printk(KERN_INFO "%s: unsupported NLPID 0x%02X in incoming call " "on LCN %d!\n", card->devname, info->user[0], new_lcn); x25_clear_call(card, new_lcn, 0, 249); } if (accept && (x25_accept_call(card, new_lcn, 0) == CMD_OK)){ bind_lcn_to_dev (card, chan->dev, new_lcn); if (x25_get_chan_conf(card, chan) == CMD_OK) set_chan_state(dev, WAN_CONNECTED); else x25_clear_call(card, new_lcn, 0, 0); } kfree(info); return 1; } /*==================================================================== * Handle accepted call. *====================================================================*/ static int call_accepted (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) { unsigned new_lcn = mb->cmd.lcn; netdevice_t* dev = find_channel(card, new_lcn); x25_channel_t* chan; if (dev == NULL){ printk(KERN_INFO "%s: clearing orphaned connection on LCN %d!\n", card->devname, new_lcn); x25_clear_call(card, new_lcn, 0, 0); return 1; } if (card->u.x.logging) printk(KERN_INFO "%s: X.25 call accepted on Dev %s and LCN %d!\n", card->devname, dev->name, new_lcn); /* Get channel configuration and notify router */ chan = dev->priv; if (x25_get_chan_conf(card, chan) != CMD_OK) { x25_clear_call(card, new_lcn, 0, 0); return 1; } set_chan_state(dev, WAN_CONNECTED); if (chan->common.usedby == API){ send_delayed_cmd_result(card,dev,mb); bind_lcn_to_dev (card, dev, new_lcn); } return 1; } /*==================================================================== * Handle cleared call. *====================================================================*/ static int call_cleared (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) { unsigned new_lcn = mb->cmd.lcn; netdevice_t* dev = find_channel(card, new_lcn); x25_channel_t *chan; unsigned char old_state; if (card->u.x.logging){ printk(KERN_INFO "%s: X.25 clear request on LCN %d! Cause:0x%02X " "Diagn:0x%02X\n", card->devname, new_lcn, mb->cmd.cause, mb->cmd.diagn); } if (dev == NULL){ printk(KERN_INFO "%s: X.25 clear request : No device for clear\n", card->devname); return 1; } chan=dev->priv; old_state = chan->common.state; set_chan_state(dev, WAN_DISCONNECTED); if (chan->common.usedby == API){ switch (old_state){ case WAN_CONNECTING: send_delayed_cmd_result(card,dev,mb); break; case WAN_CONNECTED: send_oob_msg(card,dev,mb); break; } } return ((cmd == X25_WRITE) && (lcn == new_lcn)) ? 0 : 1; } /*==================================================================== * Handle X.25 restart event. *====================================================================*/ static int restart_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) { wan_device_t* wandev = &card->wandev; netdevice_t* dev; x25_channel_t *chan; unsigned char old_state; printk(KERN_INFO "%s: X.25 restart request! Cause:0x%02X Diagn:0x%02X\n", card->devname, mb->cmd.cause, mb->cmd.diagn); /* down all logical channels */ for (dev = wandev->dev; dev; dev = *((netdevice_t**)dev->priv)){ chan=dev->priv; old_state = chan->common.state; set_chan_state(dev, WAN_DISCONNECTED); if (chan->common.usedby == API){ switch (old_state){ case WAN_CONNECTING: send_delayed_cmd_result(card,dev,mb); break; case WAN_CONNECTED: send_oob_msg(card,dev,mb); break; } } } return (cmd == X25_WRITE) ? 0 : 1; } /*==================================================================== * Handle timeout event. *====================================================================*/ static int timeout_event (sdla_t* card, int cmd, int lcn, TX25Mbox* mb) { unsigned new_lcn = mb->cmd.lcn; if (mb->cmd.pktType == 0x05) /* call request time out */ { netdevice_t* dev = find_channel(card,new_lcn); printk(KERN_INFO "%s: X.25 call timed timeout on LCN %d!\n", card->devname, new_lcn); if (dev){ x25_channel_t *chan = dev->priv; set_chan_state(dev, WAN_DISCONNECTED); if (chan->common.usedby == API){ send_delayed_cmd_result(card,dev,card->mbox); } } }else{ printk(KERN_INFO "%s: X.25 packet 0x%02X timeout on LCN %d!\n", card->devname, mb->cmd.pktType, new_lcn); } return 1; } /* * Miscellaneous */ /*==================================================================== * Establish physical connection. * o open HDLC and raise DTR * * Return: 0 connection established * 1 connection is in progress * <0 error *===================================================================*/ static int connect (sdla_t* card) { TX25Status* status = card->flags; if (x25_open_hdlc(card) || x25_setup_hdlc(card)) return -EIO; wanpipe_set_state(card, WAN_CONNECTING); x25_set_intr_mode(card, INTR_ON_TIMER); status->imask &= ~INTR_ON_TIMER; return 1; } /* * Tear down physical connection. * o close HDLC link * o drop DTR * * Return: 0 * <0 error */ static int disconnect (sdla_t* card) { wanpipe_set_state(card, WAN_DISCONNECTED); x25_set_intr_mode(card, INTR_ON_TIMER); /* disable all interrupt except timer */ x25_close_hdlc(card); /* close HDLC link */ x25_set_dtr(card, 0); /* drop DTR */ return 0; } /* * Find network device by its channel number. */ static netdevice_t* get_dev_by_lcn (wan_device_t* wandev, unsigned lcn) { netdevice_t* dev; for (dev = wandev->dev; dev; dev = *((netdevice_t**)dev->priv)) if (((x25_channel_t*)dev->priv)->common.lcn == lcn) break; return dev; } /* * Initiate connection on the logical channel. * o for PVC we just get channel configuration * o for SVCs place an X.25 call * * Return: 0 connected * >0 connection in progress * <0 failure */ static int chan_connect (netdevice_t* dev) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; if (chan->common.svc && chan->common.usedby == WANPIPE){ if (!chan->addr[0]){ printk(KERN_INFO "%s: No Destination Address\n", card->devname); return -EINVAL; /* no destination address */ } printk(KERN_INFO "%s: placing X.25 call to %s ...\n", card->devname, chan->addr); if (x25_place_call(card, chan) != CMD_OK) return -EIO; set_chan_state(dev, WAN_CONNECTING); return 1; }else{ if (x25_get_chan_conf(card, chan) != CMD_OK) return -EIO; set_chan_state(dev, WAN_CONNECTED); } return 0; } /* * Disconnect logical channel. * o if SVC then clear X.25 call */ static int chan_disc (netdevice_t* dev) { x25_channel_t* chan = dev->priv; if (chan->common.svc){ x25_clear_call(chan->card, chan->common.lcn, 0, 0); /* For API we disconnect on clear * confirmation. */ if (chan->common.usedby == API) return 0; } set_chan_state(dev, WAN_DISCONNECTED); return 0; } /* * Set logical channel state. */ static void set_chan_state (netdevice_t* dev, int state) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; unsigned long flags; save_flags(flags); cli(); if (chan->common.state != state) { switch (state) { case WAN_CONNECTED: if (card->u.x.logging){ printk (KERN_INFO "%s: interface %s connected, lcn %i !\n", card->devname, dev->name,chan->common.lcn); } *(unsigned short*)dev->dev_addr = htons(chan->common.lcn); chan->i_timeout_sofar = jiffies; /* LAPB is PVC Based */ if (card->u.x.LAPB_hdlc) chan->common.svc=0; break; case WAN_CONNECTING: if (card->u.x.logging){ printk (KERN_INFO "%s: interface %s connecting, lcn %i ...\n", card->devname, dev->name, chan->common.lcn); } break; case WAN_DISCONNECTED: if (card->u.x.logging){ printk (KERN_INFO "%s: interface %s disconnected, lcn %i !\n", card->devname, dev->name,chan->common.lcn); } atomic_set(&chan->common.disconnect,0); if (chan->common.svc) { *(unsigned short*)dev->dev_addr = 0; card->u.x.svc_to_dev_map[(chan->common.lcn%X25_MAX_CHAN)]=NULL; chan->common.lcn = 0; } if (chan->transmit_length){ chan->transmit_length=0; atomic_set(&chan->common.driver_busy,0); chan->tx_offset=0; if (is_queue_stopped(dev)){ wake_net_dev(dev); } } atomic_set(&chan->common.command,0); break; case WAN_DISCONNECTING: if (card->u.x.logging){ printk (KERN_INFO "\n%s: interface %s disconnecting, lcn %i ...\n", card->devname, dev->name,chan->common.lcn); } atomic_set(&chan->common.disconnect,0); break; } chan->common.state = state; } chan->state_tick = jiffies; restore_flags(flags); } /* * Send packet on a logical channel. * When this function is called, tx_skb field of the channel data * space points to the transmit socket buffer. When transmission * is complete, release socket buffer and reset 'tbusy' flag. * * Return: 0 - transmission complete * 1 - busy * * Notes: * 1. If packet length is greater than MTU for this channel, we'll fragment * the packet into 'complete sequence' using M-bit. * 2. When transmission is complete, an event notification should be issued * to the router. */ static int chan_send (netdevice_t* dev, void* buff, unsigned data_len, unsigned char tx_intr) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; TX25Status* status = card->flags; unsigned len=0, qdm=0, res=0, orig_len = 0; void *data; /* Check to see if channel is ready */ if ((!(status->cflags[chan->ch_idx] & 0x40) && !card->u.x.LAPB_hdlc) || !(*card->u.x.hdlc_buf_status & 0x40)){ if (!tx_intr){ setup_for_delayed_transmit (dev, buff, data_len); return 0; }else{ /* By returning 0 to tx_intr the packet will be dropped */ ++card->wandev.stats.tx_dropped; ++chan->ifstats.tx_dropped; printk(KERN_INFO "%s: ERROR, Tx intr could not send, dropping %s:\n", card->devname,dev->name); ++chan->if_send_stat.if_send_bfr_not_passed_to_adptr; return 0; } } if (chan->common.usedby == API){ /* Remove the API Header */ x25api_hdr_t *api_data = (x25api_hdr_t *)buff; /* Set the qdm bits from the packet header * User has the option to set the qdm bits */ qdm = api_data->qdm; orig_len = len = data_len - sizeof(x25api_hdr_t); data = (unsigned char*)buff + sizeof(x25api_hdr_t); }else{ data = buff; orig_len = len = data_len; } if (tx_intr){ /* We are in tx_intr, minus the tx_offset from * the total length. The tx_offset part of the * data has already been sent. Also, move the * data pointer to proper offset location. */ len -= chan->tx_offset; data = (unsigned char*)data + chan->tx_offset; } /* Check if the packet length is greater than MTU * If YES: Cut the len to MTU and set the M bit */ if (len > chan->tx_pkt_size && !card->u.x.LAPB_hdlc){ len = chan->tx_pkt_size; qdm |= M_BIT; } /* Pass only first three bits of the qdm byte to the send * routine. In case user sets any other bit which might * cause errors. */ switch(x25_send(card, chan->common.lcn, (qdm&0x07), len, data)){ case 0x00: /* success */ chan->i_timeout_sofar = jiffies; #ifdef LINUX_2_4 dev->trans_start=jiffies; #endif if ((qdm & M_BIT) && !card->u.x.LAPB_hdlc){ if (!tx_intr){ /* The M bit was set, which means that part of the * packet has been sent. Copy the packet into a buffer * and set the offset to len, so on next tx_inter * the packet will be sent using the below offset. */ chan->tx_offset += len; ++chan->ifstats.tx_packets; #if defined(LINUX_2_1) || defined(LINUX_2_4) chan->ifstats.tx_bytes += len; #endif if (chan->tx_offset < orig_len){ setup_for_delayed_transmit (dev, buff, data_len); } res=0; }else{ /* We are already in tx_inter, thus data is already * in the buffer. Update the offset and wait for * next tx_intr. We add on to the offset, since data can * be X number of times larger than max data size. */ ++chan->ifstats.tx_packets; #if defined(LINUX_2_1) || defined(LINUX_2_4) chan->ifstats.tx_bytes += len; #endif ++chan->if_send_stat.if_send_bfr_passed_to_adptr; chan->tx_offset += len; /* The user can set the qdm bit as well. * If the entire packet was sent and qdm is still * set, than it's the user who has set the M bit. In that, * case indicate that the packet was send by returning * 0 and wait for a new packet. Otherwise, wait for next * tx interrupt to send the rest of the packet */ if (chan->tx_offset < orig_len){ res=1; }else{ res=0; } } }else{ ++chan->ifstats.tx_packets; #if defined(LINUX_2_1) || defined(LINUX_2_4) chan->ifstats.tx_bytes += len; #endif ++chan->if_send_stat.if_send_bfr_passed_to_adptr; res=0; } break; case 0x33: /* Tx busy */ if (tx_intr){ printk(KERN_INFO "%s: Tx_intr: Big Error dropping packet %s\n", card->devname,dev->name); ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; ++chan->if_send_stat.if_send_bfr_not_passed_to_adptr; res=0; }else{ DBG_PRINTK(KERN_INFO "%s: Send: Big Error should have tx: storring %s\n", card->devname,dev->name); setup_for_delayed_transmit (dev, buff, data_len); res=1; } break; default: /* failure */ ++chan->ifstats.tx_errors; if (tx_intr){ printk(KERN_INFO "%s: Tx_intr: Failure to send, dropping %s\n", card->devname,dev->name); ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; ++chan->if_send_stat.if_send_bfr_not_passed_to_adptr; res=0; }else{ DBG_PRINTK(KERN_INFO "%s: Send: Failure to send !!!, storing %s\n", card->devname,dev->name); setup_for_delayed_transmit (dev, buff, data_len); res=1; } break; } return res; } /* * Parse X.25 call request data and fill x25_call_info_t structure. */ static void parse_call_info (unsigned char* str, x25_call_info_t* info) { memset(info, 0, sizeof(x25_call_info_t)); for (; *str; ++str) { int i; unsigned char ch; if (*str == '-') switch (str[1]) { /* Take minus 2 off the maximum size so that * last byte is 0. This way we can use string * manipulaton functions on call information. */ case 'd': /* destination address */ for (i = 0; i < (MAX_X25_ADDR_SIZE-2); ++i){ ch = str[2+i]; if (isspace(ch)) break; info->dest[i] = ch; } break; case 's': /* source address */ for (i = 0; i < (MAX_X25_ADDR_SIZE-2); ++i){ ch = str[2+i]; if (isspace(ch)) break; info->src[i] = ch; } break; case 'u': /* user data */ for (i = 0; i < (MAX_X25_DATA_SIZE-2); ++i){ ch = str[2+i]; if (isspace(ch)) break; info->user[i] = ch; } info->nuser = i; break; case 'f': /* facilities */ for (i = 0; i < (MAX_X25_FACL_SIZE-2); ++i){ ch = str[2+i]; if (isspace(ch)) break; info->facil[i] = ch; } info->nfacil = i; break; } } } /* * Convert line speed in bps to a number used by S502 code. */ static unsigned char bps_to_speed_code (unsigned long bps) { unsigned char number; if (bps <= 1200) number = 0x01; else if (bps <= 2400) number = 0x02; else if (bps <= 4800) number = 0x03; else if (bps <= 9600) number = 0x04; else if (bps <= 19200) number = 0x05; else if (bps <= 38400) number = 0x06; else if (bps <= 45000) number = 0x07; else if (bps <= 56000) number = 0x08; else if (bps <= 64000) number = 0x09; else if (bps <= 74000) number = 0x0A; else if (bps <= 112000) number = 0x0B; else if (bps <= 128000) number = 0x0C; else number = 0x0D; return number; } /* * Convert decimal string to unsigned integer. * If len != 0 then only 'len' characters of the string are converted. */ static unsigned int dec_to_uint (unsigned char* str, int len) { unsigned val; if (!len) len = strlen(str); for (val = 0; len && is_digit(*str); ++str, --len) val = (val * 10) + (*str - (unsigned)'0'); return val; } /* * Convert hex string to unsigned integer. * If len != 0 then only 'len' characters of the string are conferted. */ static unsigned int hex_to_uint (unsigned char* str, int len) { unsigned val, ch; if (!len) len = strlen(str); for (val = 0; len; ++str, --len) { ch = *str; if (is_digit(ch)) val = (val << 4) + (ch - (unsigned)'0'); else if (is_hex_digit(ch)) val = (val << 4) + ((ch & 0xDF) - (unsigned)'A' + 10); else break; } return val; } static int handle_IPXWAN(unsigned char *sendpacket, char *devname, unsigned char enable_IPX, unsigned long network_number, unsigned short proto) { int i; if( proto == 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] = 'X'; 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 its an IPX-data packet, so it'll get passed up the stack. */ /* switch the network numbers */ switch_net_numbers(sendpacket, network_number, 1); return 0; } } /* * 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 */ /********************* X25API SPECIFIC FUNCTIONS ****************/ /*=============================================================== * find_channel * * Manages the lcn to device map. It increases performance * because it eliminates the need to search through the link * list for a device which is bounded to a specific lcn. * *===============================================================*/ netdevice_t * find_channel(sdla_t *card, unsigned lcn) { if (card->u.x.LAPB_hdlc){ return card->wandev.dev; }else{ /* We don't know whether the incoming lcn * is a PVC or an SVC channel. But we do know that * the lcn cannot be for both the PVC and the SVC * channel. * If the lcn number is greater or equal to 255, * take the modulo 255 of that number. We only have * 255 locations, thus higher numbers must be mapped * to a number between 0 and 245. * We must separate pvc's and svc's since two don't * have to be contiguous. Meaning pvc's can start * from 1 to 10 and svc's can start from 256 to 266. * But 256%255 is 1, i.e. CONFLICT. */ /* Highest LCN number must be less or equal to 4096 */ if ((lcn <= MAX_LCN_NUM) && (lcn > 0)){ if (lcn < X25_MAX_CHAN){ if (card->u.x.svc_to_dev_map[lcn]) return card->u.x.svc_to_dev_map[lcn]; if (card->u.x.pvc_to_dev_map[lcn]) return card->u.x.pvc_to_dev_map[lcn]; }else{ int new_lcn = lcn%X25_MAX_CHAN; if (card->u.x.svc_to_dev_map[new_lcn]) return card->u.x.svc_to_dev_map[new_lcn]; if (card->u.x.pvc_to_dev_map[new_lcn]) return card->u.x.pvc_to_dev_map[new_lcn]; } } return NULL; } } void bind_lcn_to_dev (sdla_t *card, netdevice_t *dev,unsigned lcn) { x25_channel_t *chan = dev->priv; /* Modulo the lcn number by X25_MAX_CHAN (255) * because the lcn number can be greater than 255 * * We need to split svc and pvc since they don't have * to be contigous. */ if (chan->common.svc){ card->u.x.svc_to_dev_map[(lcn % X25_MAX_CHAN)] = dev; }else{ card->u.x.pvc_to_dev_map[(lcn % X25_MAX_CHAN)] = dev; } chan->common.lcn = lcn; } /*=============================================================== * x25api_bh * * *==============================================================*/ static void x25api_bh (netdevice_t * dev) { x25_channel_t* chan = dev->priv; sdla_t* card = chan->card; struct sk_buff *skb; if (atomic_read(&chan->bh_buff_used) == 0){ printk(KERN_INFO "%s: BH Buffer Empty in BH\n", card->devname); clear_bit(0, &chan->tq_working); return; } while (atomic_read(&chan->bh_buff_used)){ /* If the sock is in the process of unlinking the * driver from the socket, we must get out. * This never happends but is a sanity check. */ if (test_bit(0,&chan->common.common_critical)){ clear_bit(0, &chan->tq_working); return; } /* If LAPB HDLC, do not drop packets if socket is * not connected. Let the buffer fill up and * turn off rx interrupt */ if (card->u.x.LAPB_hdlc){ if (chan->common.sk == NULL || chan->common.func == NULL){ clear_bit(0, &chan->tq_working); return; } } skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb; if (skb == NULL){ printk(KERN_INFO "%s: BH Skb empty for read %i\n", card->devname,chan->bh_read); }else{ if (chan->common.sk == NULL || chan->common.func == NULL){ printk(KERN_INFO "%s: BH: Socket disconnected, dropping\n", card->devname); wan_dev_kfree_skb(skb, FREE_READ); x25api_bh_cleanup(dev); ++chan->ifstats.rx_dropped; ++chan->rx_intr_stat.rx_intr_bfr_not_passed_to_stack; continue; } if (chan->common.func(skb,dev,chan->common.sk) != 0){ /* Sock full cannot send, queue us for another * try */ printk(KERN_INFO "%s: BH: !!! Packet failed to send !!!!! \n", card->devname); atomic_set(&chan->common.receive_block,1); return; }else{ x25api_bh_cleanup(dev); ++chan->rx_intr_stat.rx_intr_bfr_passed_to_stack; } } } clear_bit(0, &chan->tq_working); return; } /*=============================================================== * x25api_bh_cleanup * * *==============================================================*/ static int x25api_bh_cleanup (netdevice_t *dev) { x25_channel_t* chan = dev->priv; sdla_t *card = chan->card; TX25Status* status = card->flags; ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL; if (chan->bh_read == MAX_BH_BUFF){ chan->bh_read=0; }else{ ++chan->bh_read; } /* If the Receive interrupt was off, it means * that we filled up our circular buffer. Check * that we have space in the buffer. If so * turn the RX interrupt back on. */ if (!(status->imask & INTR_ON_RX_FRAME)){ if (atomic_read(&chan->bh_buff_used) < (MAX_BH_BUFF+1)){ printk(KERN_INFO "%s: BH: Turning on the interrupt\n", card->devname); status->imask |= INTR_ON_RX_FRAME; } } atomic_dec(&chan->bh_buff_used); return 0; } /*=============================================================== * bh_enqueue * * *==============================================================*/ static int bh_enqueue (netdevice_t *dev, struct sk_buff *skb) { x25_channel_t* chan = dev->priv; sdla_t *card = chan->card; TX25Status* status = card->flags; if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){ printk(KERN_INFO "%s: Bottom half buffer FULL\n", card->devname); return 1; } ((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb; if (chan->bh_write == MAX_BH_BUFF){ chan->bh_write=0; }else{ ++chan->bh_write; } atomic_inc(&chan->bh_buff_used); if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){ printk(KERN_INFO "%s: Buffer is now full, Turning off RX Intr\n", card->devname); status->imask &= ~INTR_ON_RX_FRAME; } return 0; } /*=============================================================== * timer_intr_cmd_exec * * Called by timer interrupt to execute a command *===============================================================*/ static int timer_intr_cmd_exec (sdla_t* card) { netdevice_t *dev; unsigned char more_to_exec=0; volatile x25_channel_t *chan=NULL; int i=0,bad_cmd=0,err=0; if (card->u.x.cmd_dev == NULL){ card->u.x.cmd_dev = card->wandev.dev; } dev = card->u.x.cmd_dev; for (;;){ chan = dev->priv; if (atomic_read(&chan->common.command)){ bad_cmd = check_bad_command(card,dev); if ((!chan->common.mbox || atomic_read(&chan->common.disconnect)) && !bad_cmd){ /* Socket has died or exited, We must bring the * channel down before anybody else tries to * use it */ err = channel_disconnect(card,dev); }else{ err = execute_delayed_cmd(card, dev, (mbox_cmd_t*)chan->common.mbox, bad_cmd); } switch (err){ case RETURN_RESULT: /* Return the result to the socket without * delay. NO_WAIT Command */ atomic_set(&chan->common.command,0); if (atomic_read(&card->u.x.command_busy)) atomic_set(&card->u.x.command_busy,0); send_delayed_cmd_result(card,dev,card->mbox); more_to_exec=0; break; case DELAY_RESULT: /* Wait for the remote to respond, before * sending the result up to the socket. * WAIT command */ if (atomic_read(&card->u.x.command_busy)) atomic_set(&card->u.x.command_busy,0); atomic_set(&chan->common.command,0); more_to_exec=0; break; default: /* If command could not be executed for * some reason (i.e return code 0x33 busy) * set the more_to_exec bit which will * indicate that this command must be exectued * again during next timer interrupt */ more_to_exec=1; if (atomic_read(&card->u.x.command_busy) == 0) atomic_set(&card->u.x.command_busy,1); break; } bad_cmd=0; /* If flags is set, there are no hdlc buffers, * thus, wait for the next pass and try the * same command again. Otherwise, start searching * from next device on the next pass. */ if (!more_to_exec){ dev = move_dev_to_next(card,dev); } break; }else{ /* This device has nothing to execute, * go to next. */ if (atomic_read(&card->u.x.command_busy)) atomic_set(&card->u.x.command_busy,0); dev = move_dev_to_next(card,dev); } if (++i == card->u.x.no_dev){ if (!more_to_exec){ DBG_PRINTK(KERN_INFO "%s: Nothing to execute in Timer\n", card->devname); if (atomic_read(&card->u.x.command_busy)){ atomic_set(&card->u.x.command_busy,0); } } break; } } //End of FOR card->u.x.cmd_dev = dev; if (more_to_exec){ /* If more commands are pending, do not turn off timer * interrupt */ return 1; }else{ /* No more commands, turn off timer interrupt */ return 0; } } /*=============================================================== * execute_delayed_cmd * * Execute an API command which was passed down from the * sock. Sock is very limited in which commands it can * execute. Wait and No Wait commands are supported. * Place Call, Clear Call and Reset wait commands, where * Accept Call is a no_wait command. * *===============================================================*/ static int execute_delayed_cmd (sdla_t* card, netdevice_t *dev, mbox_cmd_t *usr_cmd,char bad_cmd) { TX25Mbox* mbox = card->mbox; int err; x25_channel_t *chan = dev->priv; int delay=RETURN_RESULT; if (!(*card->u.x.hdlc_buf_status & 0x40) && !bad_cmd){ return TRY_CMD_AGAIN; } /* This way a command is guaranteed to be executed for * a specific lcn, the network interface is bound to. */ usr_cmd->cmd.lcn = chan->common.lcn; /* If channel is pvc, instead of place call * run x25_channel configuration. If running LAPB HDLC * enable communications. */ if ((!chan->common.svc) && (usr_cmd->cmd.command == X25_PLACE_CALL)){ if (card->u.x.LAPB_hdlc){ DBG_PRINTK(KERN_INFO "LAPB: Connecting\n"); connect(card); set_chan_state(dev,WAN_CONNECTING); return DELAY_RESULT; }else{ DBG_PRINTK(KERN_INFO "%s: PVC is CONNECTING\n",card->devname); if (x25_get_chan_conf(card, chan) == CMD_OK){ set_chan_state(dev, WAN_CONNECTED); }else{ set_chan_state(dev, WAN_DISCONNECTED); } return RETURN_RESULT; } } /* Copy the socket mbox command onto the board */ memcpy(&mbox->cmd, &usr_cmd->cmd, sizeof(TX25Cmd)); if (usr_cmd->cmd.length){ memcpy(mbox->data, usr_cmd->data, usr_cmd->cmd.length); } /* Check if command is bad. We need to copy the cmd into * the buffer regardless since we return the, mbox to * the user */ if (bad_cmd){ mbox->cmd.result=0x01; return RETURN_RESULT; } err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err != CMD_OK && err != X25RES_NOT_READY) x25_error(card, err, usr_cmd->cmd.command, usr_cmd->cmd.lcn); if (mbox->cmd.result == X25RES_NOT_READY){ return TRY_CMD_AGAIN; } switch (mbox->cmd.command){ case X25_PLACE_CALL: switch (mbox->cmd.result){ case CMD_OK: /* Check if Place call is a wait command or a * no wait command */ if (atomic_read(&chan->common.command) & 0x80) delay=RETURN_RESULT; else delay=DELAY_RESULT; DBG_PRINTK(KERN_INFO "\n%s: PLACE CALL Binding dev %s to lcn %i\n", card->devname,dev->name, mbox->cmd.lcn); bind_lcn_to_dev (card, dev, mbox->cmd.lcn); set_chan_state(dev, WAN_CONNECTING); break; default: delay=RETURN_RESULT; set_chan_state(dev, WAN_DISCONNECTED); break; } break; case X25_ACCEPT_CALL: switch (mbox->cmd.result){ case CMD_OK: DBG_PRINTK(KERN_INFO "\n%s: ACCEPT Binding dev %s to lcn %i\n", card->devname,dev->name,mbox->cmd.lcn); bind_lcn_to_dev (card, dev, mbox->cmd.lcn); if (x25_get_chan_conf(card, chan) == CMD_OK){ set_chan_state(dev, WAN_CONNECTED); delay=RETURN_RESULT; }else{ if (x25_clear_call(card, usr_cmd->cmd.lcn, 0, 0) == CMD_OK){ /* if clear is successful, wait for clear confirm */ delay=DELAY_RESULT; }else{ /* Do not change the state here. If we fail * the accept the return code is send up *the stack, which will ether retry * or clear the call */ DBG_PRINTK(KERN_INFO "%s: ACCEPT: STATE MAY BE CURRUPTED 2 !!!!!\n", card->devname); delay=RETURN_RESULT; } } break; case X25RES_ASYNC_PACKET: delay=TRY_CMD_AGAIN; break; default: DBG_PRINTK(KERN_INFO "%s: ACCEPT FAILED\n",card->devname); if (x25_clear_call(card, usr_cmd->cmd.lcn, 0, 0) == CMD_OK){ delay=DELAY_RESULT; }else{ /* Do not change the state here. If we fail the accept. The * return code is send up the stack, which will ether retry * or clear the call */ DBG_PRINTK(KERN_INFO "%s: ACCEPT: STATE MAY BE CORRUPTED 1 !!!!!\n", card->devname); delay=RETURN_RESULT; } } break; case X25_CLEAR_CALL: switch (mbox->cmd.result){ case CMD_OK: DBG_PRINTK(KERN_INFO "CALL CLEAR OK: Dev %s Mbox Lcn %i Chan Lcn %i\n", dev->name,mbox->cmd.lcn,chan->common.lcn); set_chan_state(dev, WAN_DISCONNECTING); delay = DELAY_RESULT; break; case X25RES_CHANNEL_IN_USE: case X25RES_ASYNC_PACKET: delay = TRY_CMD_AGAIN; break; case X25RES_LINK_NOT_IN_ABM: case X25RES_INVAL_LCN: case X25RES_INVAL_STATE: set_chan_state(dev, WAN_DISCONNECTED); delay = RETURN_RESULT; break; default: /* If command did not execute because of user * fault, do not change the state. This will * signal the socket that clear command failed. * User can retry or close the socket. * When socket gets killed, it will set the * chan->disconnect which will signal * driver to clear the call */ printk(KERN_INFO "%s: Clear Command Failed, Rc %x\n", card->devname,mbox->cmd.command); delay = RETURN_RESULT; } break; } return delay; } /*=============================================================== * api_incoming_call * * Pass an incoming call request up the the listening * sock. If the API sock is not listening reject the * call. * *===============================================================*/ static int api_incoming_call (sdla_t* card, TX25Mbox *mbox, int lcn) { struct sk_buff *skb; int len = sizeof(TX25Cmd)+mbox->cmd.length; if (alloc_and_init_skb_buf(card, &skb, len)){ printk(KERN_INFO "%s: API incoming call, no memory\n",card->devname); return 1; } memcpy(skb_put(skb,len),&mbox->cmd,len); skb->mac.raw = skb->data; skb->protocol = htons(X25_PROT); skb->pkt_type = WAN_PACKET_ASYNC; if (card->func(skb,card->sk) < 0){ printk(KERN_INFO "%s: MAJOR ERROR: Failed to send up place call \n",card->devname); wan_dev_kfree_skb(skb, FREE_READ); return 1; } return 0; } /*=============================================================== * send_delayed_cmd_result * * Wait commands like PLEACE CALL or CLEAR CALL must wait * until the result arrives. This function passes * the result to a waiting sock. * *===============================================================*/ static void send_delayed_cmd_result(sdla_t *card, netdevice_t *dev, TX25Mbox* mbox) { x25_channel_t *chan = dev->priv; mbox_cmd_t *usr_cmd = (mbox_cmd_t *)chan->common.mbox; struct sk_buff *skb; int len=sizeof(unsigned char); atomic_set(&chan->common.command,0); /* If the sock is in the process of unlinking the * driver from the socket, we must get out. * This never happends but is a sanity check. */ if (test_bit(0,&chan->common.common_critical)){ return; } if (!usr_cmd || !chan->common.sk || !chan->common.func){ DBG_PRINTK(KERN_INFO "Delay result: Sock not bounded sk: %u, func: %u, mbox: %u\n", (unsigned int)chan->common.sk, (unsigned int)chan->common.func, (unsigned int)usr_cmd); return; } memcpy(&usr_cmd->cmd, &mbox->cmd, sizeof(TX25Cmd)); if (mbox->cmd.length > 0){ memcpy(usr_cmd->data, mbox->data, mbox->cmd.length); } if (alloc_and_init_skb_buf(card,&skb,len)){ printk(KERN_INFO "Delay result: No sock buffers\n"); return; } memcpy(skb_put(skb,len),&mbox->cmd.command,len); skb->mac.raw = skb->data; skb->pkt_type = WAN_PACKET_CMD; chan->common.func(skb,dev,chan->common.sk); } /*=============================================================== * clear_confirm_event * * Pass the clear confirmation event up the sock. The * API will disconnect only after the clear confirmation * has been received. * * Depending on the state, clear confirmation could * be an OOB event, or a result of an API command. *===============================================================*/ static int clear_confirm_event (sdla_t *card, TX25Mbox* mb) { netdevice_t *dev; x25_channel_t *chan; unsigned char old_state; dev = find_channel(card,mb->cmd.lcn); if (!dev){ DBG_PRINTK(KERN_INFO "%s: *** GOT CLEAR BUT NO DEV %i\n", card->devname,mb->cmd.lcn); return 0; } chan=dev->priv; DBG_PRINTK(KERN_INFO "%s: GOT CLEAR CONFIRM %s: Mbox lcn %i Chan lcn %i\n", card->devname, dev->name, mb->cmd.lcn, chan->common.lcn); /* If not API fall through to default. * If API, send the result to a waiting * socket. */ old_state = chan->common.state; set_chan_state(dev, WAN_DISCONNECTED); if (chan->common.usedby == API){ switch (old_state) { case WAN_DISCONNECTING: case WAN_CONNECTING: send_delayed_cmd_result(card,dev,mb); break; case WAN_CONNECTED: send_oob_msg(card,dev,mb); break; } return 1; } return 0; } /*=============================================================== * send_oob_msg * * Construct an NEM Message and pass it up the connected * sock. If the sock is not bounded discard the NEM. * *===============================================================*/ static void send_oob_msg (sdla_t *card, netdevice_t *dev, TX25Mbox *mbox) { x25_channel_t *chan = dev->priv; mbox_cmd_t *usr_cmd = (mbox_cmd_t *)chan->common.mbox; struct sk_buff *skb; int len=sizeof(x25api_hdr_t)+mbox->cmd.length; x25api_t *api_hdr; /* If the sock is in the process of unlinking the * driver from the socket, we must get out. * This never happends but is a sanity check. */ if (test_bit(0,&chan->common.common_critical)){ return; } if (!usr_cmd || !chan->common.sk || !chan->common.func){ DBG_PRINTK(KERN_INFO "OOB MSG: Sock not bounded\n"); return; } memcpy(&usr_cmd->cmd, &mbox->cmd, sizeof(TX25Cmd)); if (mbox->cmd.length > 0){ memcpy(usr_cmd->data, mbox->data, mbox->cmd.length); } if (alloc_and_init_skb_buf(card,&skb,len)){ printk(KERN_INFO "%s: OOB MSG: No sock buffers\n",card->devname); return; } api_hdr = (x25api_t*)skb_put(skb,len); api_hdr->hdr.pktType = mbox->cmd.pktType & 0x7F; api_hdr->hdr.qdm = mbox->cmd.qdm; api_hdr->hdr.cause = mbox->cmd.cause; api_hdr->hdr.diagn = mbox->cmd.diagn; api_hdr->hdr.length = mbox->cmd.length; api_hdr->hdr.result = mbox->cmd.result; api_hdr->hdr.lcn = mbox->cmd.lcn; if (mbox->cmd.length > 0){ memcpy(api_hdr->data,mbox->data,mbox->cmd.length); } skb->mac.raw = skb->data; skb->pkt_type = WAN_PACKET_ERR; if (chan->common.func(skb,dev,chan->common.sk) < 0){ if (bh_enqueue(dev,skb)){ printk(KERN_INFO "%s: Dropping OOB MSG\n",card->devname); wan_dev_kfree_skb(skb, FREE_READ); } } DBG_PRINTK(KERN_INFO "%s: OOB MSG OK, %s, lcn %i\n", card->devname, dev->name, mbox->cmd.lcn); } /*=============================================================== * alloc_and_init_skb_buf * * Allocate and initialize an skb buffer. * *===============================================================*/ static int alloc_and_init_skb_buf (sdla_t *card, struct sk_buff **skb, int len) { struct sk_buff *new_skb = *skb; new_skb = dev_alloc_skb(len + X25_HRDHDR_SZ); if (new_skb == NULL){ printk(KERN_INFO "%s: no socket buffers available!\n", card->devname); return 1; } if (skb_tailroom(new_skb) < len){ /* No room for the packet. Call off the whole thing! */ wan_dev_kfree_skb(new_skb, FREE_READ); printk(KERN_INFO "%s: Listen: unexpectedly long packet sequence\n" ,card->devname); *skb = NULL; return 1; } *skb = new_skb; return 0; } /*=============================================================== * api_oob_event * * Send an OOB event up to the sock * *===============================================================*/ static void api_oob_event (sdla_t *card,TX25Mbox *mbox) { netdevice_t *dev = find_channel(card,mbox->cmd.lcn); x25_channel_t *chan; if (!dev) return; chan=dev->priv; if (chan->common.usedby == API) send_oob_msg(card,dev,mbox); } static int channel_disconnect (sdla_t* card, netdevice_t *dev) { int err; x25_channel_t *chan = dev->priv; DBG_PRINTK(KERN_INFO "%s: TIMER: %s, Device down disconnecting\n", card->devname,dev->name); if (chan->common.svc){ err = x25_clear_call(card,chan->common.lcn,0,0); }else{ /* If channel is PVC or LAPB HDLC, there is no call * to be cleared, thus drop down to the default * area */ err = 1; } switch (err){ case X25RES_CHANNEL_IN_USE: case X25RES_NOT_READY: err = TRY_CMD_AGAIN; break; case CMD_OK: DBG_PRINTK(KERN_INFO "CALL CLEAR OK: Dev %s Chan Lcn %i\n", dev->name,chan->common.lcn); set_chan_state(dev,WAN_DISCONNECTING); atomic_set(&chan->common.command,0); err = DELAY_RESULT; break; default: /* If LAPB HDLC protocol, bring the whole link down * once the application terminates */ set_chan_state(dev,WAN_DISCONNECTED); if (card->u.x.LAPB_hdlc){ DBG_PRINTK(KERN_INFO "LAPB: Disconnecting Link\n"); hdlc_link_down (card); } atomic_set(&chan->common.command,0); err = RETURN_RESULT; break; } return err; } static void hdlc_link_down (sdla_t *card) { TX25Mbox* mbox = card->mbox; int retry = 5; int err=0; do { memset(mbox,0,sizeof(TX25Mbox)); mbox->cmd.command = X25_HDLC_LINK_DISC; mbox->cmd.length = 1; mbox->data[0]=0; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && x25_error(card, err, X25_HDLC_LINK_DISC, 0)); if (err) printk(KERN_INFO "%s: Hdlc Link Down Failed %x\n",card->devname,err); disconnect (card); } static int check_bad_command (sdla_t* card, netdevice_t *dev) { x25_channel_t *chan = dev->priv; int bad_cmd = 0; switch (atomic_read(&chan->common.command)&0x7F){ case X25_PLACE_CALL: if (chan->common.state != WAN_DISCONNECTED) bad_cmd=1; break; case X25_CLEAR_CALL: if (chan->common.state == WAN_DISCONNECTED) bad_cmd=1; break; case X25_ACCEPT_CALL: if (chan->common.state != WAN_CONNECTING) bad_cmd=1; break; case X25_RESET: if (chan->common.state != WAN_CONNECTED) bad_cmd=1; break; default: bad_cmd=1; break; } if (bad_cmd){ printk(KERN_INFO "%s: Invalid State, BAD Command %x, dev %s, lcn %i, st %i\n", card->devname,atomic_read(&chan->common.command),dev->name, chan->common.lcn, chan->common.state); } return bad_cmd; } /*************************** XPIPEMON FUNCTIONS **************************/ /*============================================================================== * Process UDP call of type XPIPE */ static int process_udp_mgmt_pkt(sdla_t *card) { int c_retry = MAX_CMD_RETRY; unsigned int len; struct sk_buff *new_skb; TX25Mbox *mbox = card->mbox; int err; int udp_mgmt_req_valid = 1; netdevice_t *dev; x25_channel_t *chan; unsigned short lcn; struct timeval tv; x25_udp_pkt_t *x25_udp_pkt; x25_udp_pkt = (x25_udp_pkt_t *)card->u.x.udp_pkt_data; dev = card->u.x.udp_dev; chan = dev->priv; lcn = chan->common.lcn; switch(x25_udp_pkt->cblock.command) { /* XPIPE_ENABLE_TRACE */ case XPIPE_ENABLE_TRACING: /* XPIPE_GET_TRACE_INFO */ case XPIPE_GET_TRACE_INFO: /* SET FT1 MODE */ case XPIPE_SET_FT1_MODE: if(card->u.x.udp_pkt_src == UDP_PKT_FRM_NETWORK) { ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_direction_err; udp_mgmt_req_valid = 0; break; } /* XPIPE_FT1_READ_STATUS */ case XPIPE_FT1_READ_STATUS: /* FT1 MONITOR STATUS */ case XPIPE_FT1_STATUS_CTRL: if(card->hw.fwid != SFID_X25_508) { ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_type_err; udp_mgmt_req_valid = 0; break; } default: break; } if(!udp_mgmt_req_valid) { /* set length to 0 */ x25_udp_pkt->cblock.length = 0; /* set return code */ x25_udp_pkt->cblock.result = (card->hw.fwid != SFID_X25_508) ? 0x1F : 0xCD; } else { switch (x25_udp_pkt->cblock.command) { case XPIPE_FLUSH_DRIVER_STATS: init_x25_channel_struct(chan); init_global_statistics(card); mbox->cmd.length = 0; break; case XPIPE_DRIVER_STAT_IFSEND: memcpy(x25_udp_pkt->data, &chan->if_send_stat, sizeof(if_send_stat_t)); mbox->cmd.length = sizeof(if_send_stat_t); x25_udp_pkt->cblock.length = mbox->cmd.length; break; case XPIPE_DRIVER_STAT_INTR: memcpy(&x25_udp_pkt->data[0], &card->statistics, sizeof(global_stats_t)); memcpy(&x25_udp_pkt->data[sizeof(global_stats_t)], &chan->rx_intr_stat, sizeof(rx_intr_stat_t)); mbox->cmd.length = sizeof(global_stats_t) + sizeof(rx_intr_stat_t); x25_udp_pkt->cblock.length = mbox->cmd.length; break; case XPIPE_DRIVER_STAT_GEN: memcpy(x25_udp_pkt->data, &chan->pipe_mgmt_stat.UDP_PIPE_mgmt_kmalloc_err, sizeof(pipe_mgmt_stat_t)); memcpy(&x25_udp_pkt->data[sizeof(pipe_mgmt_stat_t)], &card->statistics, sizeof(global_stats_t)); x25_udp_pkt->cblock.result = 0; x25_udp_pkt->cblock.length = sizeof(global_stats_t)+ sizeof(rx_intr_stat_t); mbox->cmd.length = x25_udp_pkt->cblock.length; break; case XPIPE_ROUTER_UP_TIME: do_gettimeofday(&tv); chan->router_up_time = tv.tv_sec - chan->router_start_time; *(unsigned long *)&x25_udp_pkt->data = chan->router_up_time; x25_udp_pkt->cblock.length = mbox->cmd.length = 4; x25_udp_pkt->cblock.result = 0; break; default : do { memcpy(&mbox->cmd, &x25_udp_pkt->cblock.command, sizeof(TX25Cmd)); if(mbox->cmd.length){ memcpy(&mbox->data, (char *)x25_udp_pkt->data, mbox->cmd.length); } err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && c_retry-- && x25_error(card, err, mbox->cmd.command, 0)); if ( err == CMD_OK || (err == 1 && (mbox->cmd.command == 0x06 || mbox->cmd.command == 0x16) ) ){ ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_OK; } else { ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_cmnd_timeout; } /* copy the result back to our buffer */ memcpy(&x25_udp_pkt->cblock.command, &mbox->cmd, sizeof(TX25Cmd)); if(mbox->cmd.length) { memcpy(&x25_udp_pkt->data, &mbox->data, mbox->cmd.length); } break; } //switch } /* Fill UDP TTL */ x25_udp_pkt->ip_pkt.ttl = card->wandev.ttl; len = reply_udp(card->u.x.udp_pkt_data, mbox->cmd.length); if(card->u.x.udp_pkt_src == UDP_PKT_FRM_NETWORK) { err = x25_send(card, lcn, 0, len, card->u.x.udp_pkt_data); if (!err) ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_send_passed; else ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_adptr_send_failed; } else { /* Allocate socket buffer */ if((new_skb = dev_alloc_skb(len)) != NULL) { void *buf; /* copy data into new_skb */ buf = skb_put(new_skb, len); memcpy(buf, card->u.x.udp_pkt_data, len); /* Decapsulate packet and pass it up the protocol stack */ new_skb->dev = dev; if (chan->common.usedby == API) new_skb->protocol = htons(X25_PROT); else new_skb->protocol = htons(ETH_P_IP); new_skb->mac.raw = new_skb->data; netif_rx(new_skb); ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_passed_to_stack; } else { ++chan->pipe_mgmt_stat.UDP_PIPE_mgmt_no_socket; printk(KERN_INFO "%s: UDP mgmt cmnd, no socket buffers available!\n", card->devname); } } card->u.x.udp_pkt_lgth = 0; return 1; } /*============================================================================== * Determine what type of UDP call it is. DRVSTATS or XPIPE8ND ? */ static int udp_pkt_type( struct sk_buff *skb, sdla_t* card ) { x25_udp_pkt_t *x25_udp_pkt = (x25_udp_pkt_t *)skb->data; if((x25_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) && (x25_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45) && (x25_udp_pkt->udp_pkt.udp_dst_port == ntohs(card->wandev.udp_port)) && (x25_udp_pkt->wp_mgmt.request_reply == UDPMGMT_REQUEST)) { if(!strncmp(x25_udp_pkt->wp_mgmt.signature, UDPMGMT_XPIPE_SIGNATURE, 8)){ return UDP_XPIPE_TYPE; }else{ printk(KERN_INFO "%s: UDP Packet, Failed Signature !\n", card->devname); } } return UDP_INVALID_TYPE; } /*============================================================================ * Reply to UDP Management system. * Return nothing. */ 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; x25_udp_pkt_t *x25_udp_pkt = (x25_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 */ x25_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); x25_udp_pkt->udp_pkt.udp_length = temp; /* swap UDP ports */ temp = x25_udp_pkt->udp_pkt.udp_src_port; x25_udp_pkt->udp_pkt.udp_src_port = x25_udp_pkt->udp_pkt.udp_dst_port; x25_udp_pkt->udp_pkt.udp_dst_port = temp; /* add UDP pseudo header */ temp = 0x1100; *((unsigned short *) (x25_udp_pkt->data+mbox_len+even_bound)) = temp; temp = (udp_length<<8)|(udp_length>>8); *((unsigned short *) (x25_udp_pkt->data+mbox_len+even_bound+2)) = temp; /* calculate UDP checksum */ x25_udp_pkt->udp_pkt.udp_checksum = 0; x25_udp_pkt->udp_pkt.udp_checksum = calc_checksum(&data[UDP_OFFSET], udp_length+UDP_OFFSET); /* fill in IP length */ ip_length = len; temp = (ip_length<<8)|(ip_length>>8); x25_udp_pkt->ip_pkt.total_length = temp; /* swap IP addresses */ ip_temp = x25_udp_pkt->ip_pkt.ip_src_address; x25_udp_pkt->ip_pkt.ip_src_address = x25_udp_pkt->ip_pkt.ip_dst_address; x25_udp_pkt->ip_pkt.ip_dst_address = ip_temp; /* fill in IP checksum */ x25_udp_pkt->ip_pkt.hdr_checksum = 0; x25_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; } /*============================================================================= * Store a UDP management packet for later processing. */ static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card, netdevice_t *dev, struct sk_buff *skb, int lcn) { int udp_pkt_stored = 0; if(!card->u.x.udp_pkt_lgth && (skb->len <= MAX_LGTH_UDP_MGNT_PKT)){ card->u.x.udp_pkt_lgth = skb->len; card->u.x.udp_type = udp_type; card->u.x.udp_pkt_src = udp_pkt_src; card->u.x.udp_lcn = lcn; card->u.x.udp_dev = dev; memcpy(card->u.x.udp_pkt_data, skb->data, skb->len); card->u.x.timer_int_enabled |= TMR_INT_ENABLED_UDP_PKT; udp_pkt_stored = 1; }else{ printk(KERN_INFO "%s: ERROR: UDP packet not stored for LCN %d\n", card->devname,lcn); } if(udp_pkt_src == UDP_PKT_FRM_STACK){ wan_dev_kfree_skb(skb, FREE_WRITE); }else{ wan_dev_kfree_skb(skb, FREE_READ); } return(udp_pkt_stored); } /*============================================================================= * Initial the ppp_private_area structure. */ static void init_x25_channel_struct( x25_channel_t *chan ) { memset(&chan->if_send_stat.if_send_entry,0,sizeof(if_send_stat_t)); memset(&chan->rx_intr_stat.rx_intr_no_socket,0,sizeof(rx_intr_stat_t)); memset(&chan->pipe_mgmt_stat.UDP_PIPE_mgmt_kmalloc_err,0,sizeof(pipe_mgmt_stat_t)); } /*============================================================================ * Initialize Global Statistics */ static void init_global_statistics( sdla_t *card ) { memset(&card->statistics.isr_entry,0,sizeof(global_stats_t)); } /*=============================================================== * SMP Support * ==============================================================*/ static void S508_S514_lock(sdla_t *card, unsigned long *smp_flags) { spin_lock_irqsave(&card->wandev.lock, *smp_flags); } static void S508_S514_unlock(sdla_t *card, unsigned long *smp_flags) { spin_unlock_irqrestore(&card->wandev.lock, *smp_flags); } /*=============================================================== * x25_timer_routine * * A more efficient polling routine. Each half a second * queue a polling task. We want to do the polling in a * task not timer, because timer runs in interrupt time. * * FIXME Polling should be rethinked. *==============================================================*/ static void x25_timer_routine(unsigned long data) { sdla_t *card = (sdla_t*)data; if (!card->wandev.dev){ printk(KERN_INFO "%s: Stopping the X25 Poll Timer: No Dev.\n", card->devname); return; } if (card->open_cnt != card->u.x.num_of_ch){ printk(KERN_INFO "%s: Stopping the X25 Poll Timer: Interface down.\n", card->devname); return; } if (test_bit(PERI_CRIT,&card->wandev.critical)){ printk(KERN_INFO "%s: Stopping the X25 Poll Timer: Shutting down.\n", card->devname); return; } if (!test_and_set_bit(POLL_CRIT,&card->wandev.critical)){ trigger_x25_poll(card); } card->u.x.x25_timer.expires=jiffies+(HZ>>1); add_timer(&card->u.x.x25_timer); return; } void disable_comm_shutdown(sdla_t *card) { TX25Mbox* mbox = card->mbox; int err; /* Turn of interrutps */ mbox->data[0] = 0; if (card->hw.fwid == SFID_X25_508){ mbox->data[1] = card->hw.irq; mbox->data[2] = 2; mbox->cmd.length = 3; }else { mbox->cmd.length = 1; } mbox->cmd.command = X25_SET_INTERRUPT_MODE; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err) printk(KERN_INFO "INTERRUPT OFF FAIED %x\n",err); /* Bring down HDLC */ mbox->cmd.command = X25_HDLC_LINK_CLOSE; mbox->cmd.length = 0; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err) printk(KERN_INFO "LINK CLOSED FAILED %x\n",err); /* Brind down DTR */ mbox->data[0] = 0; mbox->data[2] = 0; mbox->data[1] = 0x01; mbox->cmd.length = 3; mbox->cmd.command = X25_SET_GLOBAL_VARS; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err) printk(KERN_INFO "DTR DOWN FAILED %x\n",err); } MODULE_LICENSE("GPL"); /****** End *****************************************************************/ |