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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [isdn/] [isdn_common.c] - Rev 1774
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/* $Id: isdn_common.c,v 1.1.1.1 2004-04-15 02:03:48 phoenix Exp $ * * Linux ISDN subsystem, common used functions (linklevel). * * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de) * Copyright 1995,96 Thinking Objects Software GmbH Wuerzburg * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de) * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * */ #include <linux/config.h> #include <linux/module.h> #include <linux/init.h> #include <linux/version.h> #include <linux/poll.h> #include <linux/vmalloc.h> #include <linux/isdn.h> #include <linux/smp_lock.h> #include "isdn_common.h" #include "isdn_tty.h" #include "isdn_net.h" #include "isdn_ppp.h" #ifdef CONFIG_ISDN_AUDIO #include "isdn_audio.h" #endif #ifdef CONFIG_ISDN_DIVERSION_MODULE #define CONFIG_ISDN_DIVERSION #endif #ifdef CONFIG_ISDN_DIVERSION #include <linux/isdn_divertif.h> #endif /* CONFIG_ISDN_DIVERSION */ #include "isdn_v110.h" #include <linux/devfs_fs_kernel.h> /* Debugflags */ #undef ISDN_DEBUG_STATCALLB MODULE_DESCRIPTION("ISDN4Linux: link layer"); MODULE_AUTHOR("Fritz Elfert"); MODULE_LICENSE("GPL"); isdn_dev *dev; static char *isdn_revision = "$Revision: 1.1.1.1 $"; extern char *isdn_net_revision; extern char *isdn_tty_revision; #ifdef CONFIG_ISDN_PPP extern char *isdn_ppp_revision; #else static char *isdn_ppp_revision = ": none $"; #endif #ifdef CONFIG_ISDN_AUDIO extern char *isdn_audio_revision; #else static char *isdn_audio_revision = ": none $"; #endif extern char *isdn_v110_revision; #ifdef CONFIG_ISDN_DIVERSION static isdn_divert_if *divert_if; /* = NULL */ #endif /* CONFIG_ISDN_DIVERSION */ static int isdn_writebuf_stub(int, int, const u_char *, int, int); static void set_global_features(void); static void isdn_register_devfs(int); static void isdn_unregister_devfs(int); static int isdn_wildmat(char *s, char *p); void isdn_lock_drivers(void) { int i; isdn_ctrl cmd; for (i = 0; i < ISDN_MAX_DRIVERS; i++) { if (!dev->drv[i]) continue; cmd.driver = i; cmd.arg = 0; cmd.command = ISDN_CMD_LOCK; isdn_command(&cmd); dev->drv[i]->locks++; } } void isdn_MOD_INC_USE_COUNT(void) { MOD_INC_USE_COUNT; isdn_lock_drivers(); } void isdn_unlock_drivers(void) { int i; for (i = 0; i < ISDN_MAX_DRIVERS; i++) { if (!dev->drv[i]) continue; if (dev->drv[i]->locks > 0) { isdn_ctrl cmd; cmd.driver = i; cmd.arg = 0; cmd.command = ISDN_CMD_UNLOCK; isdn_command(&cmd); dev->drv[i]->locks--; } } } void isdn_MOD_DEC_USE_COUNT(void) { MOD_DEC_USE_COUNT; isdn_unlock_drivers(); } #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP) void isdn_dumppkt(char *s, u_char * p, int len, int dumplen) { int dumpc; printk(KERN_DEBUG "%s(%d) ", s, len); for (dumpc = 0; (dumpc < dumplen) && (len); len--, dumpc++) printk(" %02x", *p++); printk("\n"); } #endif /* * I picked the pattern-matching-functions from an old GNU-tar version (1.10) * It was originally written and put to PD by rs@mirror.TMC.COM (Rich Salz) */ static int isdn_star(char *s, char *p) { while (isdn_wildmat(s, p)) { if (*++s == '\0') return (2); } return (0); } /* * Shell-type Pattern-matching for incoming caller-Ids * This function gets a string in s and checks, if it matches the pattern * given in p. * * Return: * 0 = match. * 1 = no match. * 2 = no match. Would eventually match, if s would be longer. * * Possible Patterns: * * '?' matches one character * '*' matches zero or more characters * [xyz] matches the set of characters in brackets. * [^xyz] matches any single character not in the set of characters */ static int isdn_wildmat(char *s, char *p) { register int last; register int matched; register int reverse; register int nostar = 1; if (!(*s) && !(*p)) return(1); for (; *p; s++, p++) switch (*p) { case '\\': /* * Literal match with following character, * fall through. */ p++; default: if (*s != *p) return (*s == '\0')?2:1; continue; case '?': /* Match anything. */ if (*s == '\0') return (2); continue; case '*': nostar = 0; /* Trailing star matches everything. */ return (*++p ? isdn_star(s, p) : 0); case '[': /* [^....] means inverse character class. */ if ((reverse = (p[1] == '^'))) p++; for (last = 0, matched = 0; *++p && (*p != ']'); last = *p) /* This next line requires a good C compiler. */ if (*p == '-' ? *s <= *++p && *s >= last : *s == *p) matched = 1; if (matched == reverse) return (1); continue; } return (*s == '\0')?0:nostar; } int isdn_msncmp( const char * msn1, const char * msn2 ) { char TmpMsn1[ ISDN_MSNLEN ]; char TmpMsn2[ ISDN_MSNLEN ]; char *p; for ( p = TmpMsn1; *msn1 && *msn1 != ':'; ) // Strip off a SPID *p++ = *msn1++; *p = '\0'; for ( p = TmpMsn2; *msn2 && *msn2 != ':'; ) // Strip off a SPID *p++ = *msn2++; *p = '\0'; return isdn_wildmat( TmpMsn1, TmpMsn2 ); } int isdn_dc2minor(int di, int ch) { int i; for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (dev->chanmap[i] == ch && dev->drvmap[i] == di) return i; return -1; } static int isdn_timer_cnt1 = 0; static int isdn_timer_cnt2 = 0; static int isdn_timer_cnt3 = 0; static void isdn_timer_funct(ulong dummy) { int tf = dev->tflags; if (tf & ISDN_TIMER_FAST) { if (tf & ISDN_TIMER_MODEMREAD) isdn_tty_readmodem(); if (tf & ISDN_TIMER_MODEMPLUS) isdn_tty_modem_escape(); if (tf & ISDN_TIMER_MODEMXMIT) isdn_tty_modem_xmit(); } if (tf & ISDN_TIMER_SLOW) { if (++isdn_timer_cnt1 >= ISDN_TIMER_02SEC) { isdn_timer_cnt1 = 0; if (tf & ISDN_TIMER_NETDIAL) isdn_net_dial(); } if (++isdn_timer_cnt2 >= ISDN_TIMER_1SEC) { isdn_timer_cnt2 = 0; if (tf & ISDN_TIMER_NETHANGUP) isdn_net_autohup(); if (++isdn_timer_cnt3 >= ISDN_TIMER_RINGING) { isdn_timer_cnt3 = 0; if (tf & ISDN_TIMER_MODEMRING) isdn_tty_modem_ring(); } if (tf & ISDN_TIMER_CARRIER) isdn_tty_carrier_timeout(); } } if (tf) { unsigned long flags; save_flags(flags); cli(); mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES); restore_flags(flags); } } void isdn_timer_ctrl(int tf, int onoff) { unsigned long flags; int old_tflags; save_flags(flags); cli(); if ((tf & ISDN_TIMER_SLOW) && (!(dev->tflags & ISDN_TIMER_SLOW))) { /* If the slow-timer wasn't activated until now */ isdn_timer_cnt1 = 0; isdn_timer_cnt2 = 0; } old_tflags = dev->tflags; if (onoff) dev->tflags |= tf; else dev->tflags &= ~tf; if (dev->tflags && !old_tflags) mod_timer(&dev->timer, jiffies+ISDN_TIMER_RES); restore_flags(flags); } /* * Receive a packet from B-Channel. (Called from low-level-module) */ static void isdn_receive_skb_callback(int di, int channel, struct sk_buff *skb) { int i; if ((i = isdn_dc2minor(di, channel)) == -1) { dev_kfree_skb(skb); return; } /* Update statistics */ dev->ibytes[i] += skb->len; /* First, try to deliver data to network-device */ if (isdn_net_rcv_skb(i, skb)) return; /* V.110 handling * makes sense for async streams only, so it is * called after possible net-device delivery. */ if (dev->v110[i]) { atomic_inc(&dev->v110use[i]); skb = isdn_v110_decode(dev->v110[i], skb); atomic_dec(&dev->v110use[i]); if (!skb) return; } /* No network-device found, deliver to tty or raw-channel */ if (skb->len) { if (isdn_tty_rcv_skb(i, di, channel, skb)) return; wake_up_interruptible(&dev->drv[di]->rcv_waitq[channel]); } else dev_kfree_skb(skb); } /* * Intercept command from Linklevel to Lowlevel. * If layer 2 protocol is V.110 and this is not supported by current * lowlevel-driver, use driver's transparent mode and handle V.110 in * linklevel instead. */ int isdn_command(isdn_ctrl *cmd) { if (cmd->driver == -1) { printk(KERN_WARNING "isdn_command command(%x) driver -1\n", cmd->command); return(1); } if (cmd->command == ISDN_CMD_SETL2) { int idx = isdn_dc2minor(cmd->driver, cmd->arg & 255); unsigned long l2prot = (cmd->arg >> 8) & 255; unsigned long features = (dev->drv[cmd->driver]->interface->features >> ISDN_FEATURE_L2_SHIFT) & ISDN_FEATURE_L2_MASK; unsigned long l2_feature = (1 << l2prot); switch (l2prot) { case ISDN_PROTO_L2_V11096: case ISDN_PROTO_L2_V11019: case ISDN_PROTO_L2_V11038: /* If V.110 requested, but not supported by * HL-driver, set emulator-flag and change * Layer-2 to transparent */ if (!(features & l2_feature)) { dev->v110emu[idx] = l2prot; cmd->arg = (cmd->arg & 255) | (ISDN_PROTO_L2_TRANS << 8); } else dev->v110emu[idx] = 0; } } return dev->drv[cmd->driver]->interface->command(cmd); } void isdn_all_eaz(int di, int ch) { isdn_ctrl cmd; if (di < 0) return; cmd.driver = di; cmd.arg = ch; cmd.command = ISDN_CMD_SETEAZ; cmd.parm.num[0] = '\0'; isdn_command(&cmd); } /* * Begin of a CAPI like LL<->HL interface, currently used only for * supplementary service (CAPI 2.0 part III) */ #include "avmb1/capicmd.h" /* this should be moved in a common place */ int isdn_capi_rec_hl_msg(capi_msg *cm) { int di; int ch; di = (cm->adr.Controller & 0x7f) -1; ch = isdn_dc2minor(di, (cm->adr.Controller>>8)& 0x7f); switch(cm->Command) { case CAPI_FACILITY: /* in the moment only handled in tty */ return(isdn_tty_capi_facility(cm)); default: return(-1); } } static int isdn_status_callback(isdn_ctrl * c) { int di; ulong flags; int i; int r; int retval = 0; isdn_ctrl cmd; isdn_net_dev *p; di = c->driver; i = isdn_dc2minor(di, c->arg); switch (c->command) { case ISDN_STAT_BSENT: if (i < 0) return -1; if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; if (isdn_net_stat_callback(i, c)) return 0; if (isdn_v110_stat_callback(i, c)) return 0; if (isdn_tty_stat_callback(i, c)) return 0; wake_up_interruptible(&dev->drv[di]->snd_waitq[c->arg]); break; case ISDN_STAT_STAVAIL: save_flags(flags); cli(); dev->drv[di]->stavail += c->arg; restore_flags(flags); wake_up_interruptible(&dev->drv[di]->st_waitq); break; case ISDN_STAT_RUN: dev->drv[di]->flags |= DRV_FLAG_RUNNING; for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (dev->drvmap[i] == di) isdn_all_eaz(di, dev->chanmap[i]); set_global_features(); break; case ISDN_STAT_STOP: dev->drv[di]->flags &= ~DRV_FLAG_RUNNING; break; case ISDN_STAT_ICALL: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "ICALL (net): %d %ld %s\n", di, c->arg, c->parm.num); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) { cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_HANGUP; isdn_command(&cmd); return 0; } /* Try to find a network-interface which will accept incoming call */ r = ((c->command == ISDN_STAT_ICALLW) ? 0 : isdn_net_find_icall(di, c->arg, i, &c->parm.setup)); switch (r) { case 0: /* No network-device replies. * Try ttyI's. * These return 0 on no match, 1 on match and * 3 on eventually match, if CID is longer. */ if (c->command == ISDN_STAT_ICALL) if ((retval = isdn_tty_find_icall(di, c->arg, &c->parm.setup))) return(retval); #ifdef CONFIG_ISDN_DIVERSION if (divert_if) if ((retval = divert_if->stat_callback(c))) return(retval); /* processed */ #endif /* CONFIG_ISDN_DIVERSION */ if ((!retval) && (dev->drv[di]->flags & DRV_FLAG_REJBUS)) { /* No tty responding */ cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_HANGUP; isdn_command(&cmd); retval = 2; } break; case 1: /* Schedule connection-setup */ isdn_net_dial(); cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_ACCEPTD; for ( p = dev->netdev; p; p = p->next ) if ( p->local->isdn_channel == cmd.arg ) { strcpy( cmd.parm.setup.eazmsn, p->local->msn ); isdn_command(&cmd); retval = 1; break; } break; case 2: /* For calling back, first reject incoming call ... */ case 3: /* Interface found, but down, reject call actively */ retval = 2; printk(KERN_INFO "isdn: Rejecting Call\n"); cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_HANGUP; isdn_command(&cmd); if (r == 3) break; /* Fall through */ case 4: /* ... then start callback. */ isdn_net_dial(); break; case 5: /* Number would eventually match, if longer */ retval = 3; break; } #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "ICALL: ret=%d\n", retval); #endif return retval; break; case ISDN_STAT_CINF: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "CINF: %ld %s\n", c->arg, c->parm.num); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; if (strcmp(c->parm.num, "0")) isdn_net_stat_callback(i, c); isdn_tty_stat_callback(i, c); break; case ISDN_STAT_CAUSE: #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "CAUSE: %ld %s\n", c->arg, c->parm.num); #endif printk(KERN_INFO "isdn: %s,ch%ld cause: %s\n", dev->drvid[di], c->arg, c->parm.num); isdn_tty_stat_callback(i, c); #ifdef CONFIG_ISDN_DIVERSION if (divert_if) divert_if->stat_callback(c); #endif /* CONFIG_ISDN_DIVERSION */ break; case ISDN_STAT_DISPLAY: #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "DISPLAY: %ld %s\n", c->arg, c->parm.display); #endif isdn_tty_stat_callback(i, c); #ifdef CONFIG_ISDN_DIVERSION if (divert_if) divert_if->stat_callback(c); #endif /* CONFIG_ISDN_DIVERSION */ break; case ISDN_STAT_DCONN: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "DCONN: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; /* Find any net-device, waiting for D-channel setup */ if (isdn_net_stat_callback(i, c)) break; isdn_v110_stat_callback(i, c); /* Find any ttyI, waiting for D-channel setup */ if (isdn_tty_stat_callback(i, c)) { cmd.driver = di; cmd.arg = c->arg; cmd.command = ISDN_CMD_ACCEPTB; isdn_command(&cmd); break; } break; case ISDN_STAT_DHUP: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "DHUP: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; dev->drv[di]->online &= ~(1 << (c->arg)); isdn_info_update(); /* Signal hangup to network-devices */ if (isdn_net_stat_callback(i, c)) break; isdn_v110_stat_callback(i, c); if (isdn_tty_stat_callback(i, c)) break; #ifdef CONFIG_ISDN_DIVERSION if (divert_if) divert_if->stat_callback(c); #endif /* CONFIG_ISDN_DIVERSION */ break; break; case ISDN_STAT_BCONN: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "BCONN: %ld\n", c->arg); #endif /* Signal B-channel-connect to network-devices */ if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; dev->drv[di]->online |= (1 << (c->arg)); isdn_info_update(); if (isdn_net_stat_callback(i, c)) break; isdn_v110_stat_callback(i, c); if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_BHUP: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "BHUP: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; dev->drv[di]->online &= ~(1 << (c->arg)); isdn_info_update(); #ifdef CONFIG_ISDN_X25 /* Signal hangup to network-devices */ if (isdn_net_stat_callback(i, c)) break; #endif isdn_v110_stat_callback(i, c); if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_NODCH: if (i < 0) return -1; #ifdef ISDN_DEBUG_STATCALLB printk(KERN_DEBUG "NODCH: %ld\n", c->arg); #endif if (dev->global_flags & ISDN_GLOBAL_STOPPED) return 0; if (isdn_net_stat_callback(i, c)) break; if (isdn_tty_stat_callback(i, c)) break; break; case ISDN_STAT_ADDCH: if (isdn_add_channels(dev->drv[di], di, c->arg, 1)) return -1; isdn_info_update(); break; case ISDN_STAT_DISCH: save_flags(flags); cli(); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if ((dev->drvmap[i] == di) && (dev->chanmap[i] == c->arg)) { if (c->parm.num[0]) dev->usage[i] &= ~ISDN_USAGE_DISABLED; else if (USG_NONE(dev->usage[i])) { dev->usage[i] |= ISDN_USAGE_DISABLED; } else retval = -1; break; } restore_flags(flags); isdn_info_update(); break; case ISDN_STAT_UNLOAD: while (dev->drv[di]->locks > 0) { isdn_ctrl cmd; cmd.driver = di; cmd.arg = 0; cmd.command = ISDN_CMD_UNLOCK; isdn_command(&cmd); dev->drv[di]->locks--; } save_flags(flags); cli(); isdn_tty_stat_callback(i, c); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (dev->drvmap[i] == di) { dev->drvmap[i] = -1; dev->chanmap[i] = -1; dev->usage[i] &= ~ISDN_USAGE_DISABLED; isdn_unregister_devfs(i); } dev->drivers--; dev->channels -= dev->drv[di]->channels; kfree(dev->drv[di]->rcverr); kfree(dev->drv[di]->rcvcount); for (i = 0; i < dev->drv[di]->channels; i++) skb_queue_purge(&dev->drv[di]->rpqueue[i]); kfree(dev->drv[di]->rpqueue); kfree(dev->drv[di]->rcv_waitq); kfree(dev->drv[di]); dev->drv[di] = NULL; dev->drvid[di][0] = '\0'; isdn_info_update(); set_global_features(); restore_flags(flags); return 0; case ISDN_STAT_L1ERR: break; case CAPI_PUT_MESSAGE: return(isdn_capi_rec_hl_msg(&c->parm.cmsg)); #ifdef CONFIG_ISDN_TTY_FAX case ISDN_STAT_FAXIND: isdn_tty_stat_callback(i, c); break; #endif #ifdef CONFIG_ISDN_AUDIO case ISDN_STAT_AUDIO: isdn_tty_stat_callback(i, c); break; #endif #ifdef CONFIG_ISDN_DIVERSION case ISDN_STAT_PROT: case ISDN_STAT_REDIR: if (divert_if) return(divert_if->stat_callback(c)); #endif /* CONFIG_ISDN_DIVERSION */ default: return -1; } return 0; } /* * Get integer from char-pointer, set pointer to end of number */ int isdn_getnum(char **p) { int v = -1; while (*p[0] >= '0' && *p[0] <= '9') v = ((v < 0) ? 0 : (v * 10)) + (int) ((*p[0]++) - '0'); return v; } #define DLE 0x10 /* * isdn_readbchan() tries to get data from the read-queue. * It MUST be called with interrupts off. * * Be aware that this is not an atomic operation when sleep != 0, even though * interrupts are turned off! Well, like that we are currently only called * on behalf of a read system call on raw device files (which are documented * to be dangerous and for for debugging purpose only). The inode semaphore * takes care that this is not called for the same minor device number while * we are sleeping, but access is not serialized against simultaneous read() * from the corresponding ttyI device. Can other ugly events, like changes * of the mapping (di,ch)<->minor, happen during the sleep? --he */ int isdn_readbchan(int di, int channel, u_char * buf, u_char * fp, int len, wait_queue_head_t *sleep) { int count; int count_pull; int count_put; int dflag; struct sk_buff *skb; u_char *cp; if (!dev->drv[di]) return 0; if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) { if (sleep) interruptible_sleep_on(sleep); else return 0; } if (len > dev->drv[di]->rcvcount[channel]) len = dev->drv[di]->rcvcount[channel]; cp = buf; count = 0; while (len) { if (!(skb = skb_peek(&dev->drv[di]->rpqueue[channel]))) break; #ifdef CONFIG_ISDN_AUDIO if (ISDN_AUDIO_SKB_LOCK(skb)) break; ISDN_AUDIO_SKB_LOCK(skb) = 1; if ((ISDN_AUDIO_SKB_DLECOUNT(skb)) || (dev->drv[di]->DLEflag & (1 << channel))) { char *p = skb->data; unsigned long DLEmask = (1 << channel); dflag = 0; count_pull = count_put = 0; while ((count_pull < skb->len) && (len > 0)) { len--; if (dev->drv[di]->DLEflag & DLEmask) { *cp++ = DLE; dev->drv[di]->DLEflag &= ~DLEmask; } else { *cp++ = *p; if (*p == DLE) { dev->drv[di]->DLEflag |= DLEmask; (ISDN_AUDIO_SKB_DLECOUNT(skb))--; } p++; count_pull++; } count_put++; } if (count_pull >= skb->len) dflag = 1; } else { #endif /* No DLE's in buff, so simply copy it */ dflag = 1; if ((count_pull = skb->len) > len) { count_pull = len; dflag = 0; } count_put = count_pull; memcpy(cp, skb->data, count_put); cp += count_put; len -= count_put; #ifdef CONFIG_ISDN_AUDIO } #endif count += count_put; if (fp) { memset(fp, 0, count_put); fp += count_put; } if (dflag) { /* We got all the data in this buff. * Now we can dequeue it. */ if (fp) *(fp - 1) = 0xff; #ifdef CONFIG_ISDN_AUDIO ISDN_AUDIO_SKB_LOCK(skb) = 0; #endif skb = skb_dequeue(&dev->drv[di]->rpqueue[channel]); dev_kfree_skb(skb); } else { /* Not yet emptied this buff, so it * must stay in the queue, for further calls * but we pull off the data we got until now. */ skb_pull(skb, count_pull); #ifdef CONFIG_ISDN_AUDIO ISDN_AUDIO_SKB_LOCK(skb) = 0; #endif } dev->drv[di]->rcvcount[channel] -= count_put; } return count; } static __inline int isdn_minor2drv(int minor) { return (dev->drvmap[minor]); } static __inline int isdn_minor2chan(int minor) { return (dev->chanmap[minor]); } static char * isdn_statstr(void) { static char istatbuf[2048]; char *p; int i; sprintf(istatbuf, "idmap:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%s ", (dev->drvmap[i] < 0) ? "-" : dev->drvid[dev->drvmap[i]]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\nchmap:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%d ", dev->chanmap[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\ndrmap:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%d ", dev->drvmap[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\nusage:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%d ", dev->usage[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\nflags:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_DRIVERS; i++) { if (dev->drv[i]) { sprintf(p, "%ld ", dev->drv[i]->online); p = istatbuf + strlen(istatbuf); } else { sprintf(p, "? "); p = istatbuf + strlen(istatbuf); } } sprintf(p, "\nphone:\t"); p = istatbuf + strlen(istatbuf); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { sprintf(p, "%s ", dev->num[i]); p = istatbuf + strlen(istatbuf); } sprintf(p, "\n"); return istatbuf; } /* Module interface-code */ void isdn_info_update(void) { infostruct *p = dev->infochain; while (p) { *(p->private) = 1; p = (infostruct *) p->next; } wake_up_interruptible(&(dev->info_waitq)); } static ssize_t isdn_read(struct file *file, char *buf, size_t count, loff_t * off) { uint minor = MINOR(file->f_dentry->d_inode->i_rdev); int len = 0; ulong flags; int drvidx; int chidx; int retval; char *p; if (off != &file->f_pos) return -ESPIPE; lock_kernel(); if (minor == ISDN_MINOR_STATUS) { if (!file->private_data) { if (file->f_flags & O_NONBLOCK) { retval = -EAGAIN; goto out; } interruptible_sleep_on(&(dev->info_waitq)); } p = isdn_statstr(); file->private_data = 0; if ((len = strlen(p)) <= count) { if (copy_to_user(buf, p, len)) { retval = -EFAULT; goto out; } *off += len; retval = len; goto out; } retval = 0; goto out; } if (!dev->drivers) { retval = -ENODEV; goto out; } if (minor <= ISDN_MINOR_BMAX) { printk(KERN_WARNING "isdn_read minor %d obsolete!\n", minor); drvidx = isdn_minor2drv(minor); if (drvidx < 0) { retval = -ENODEV; goto out; } if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) { retval = -ENODEV; goto out; } chidx = isdn_minor2chan(minor); if (!(p = kmalloc(count, GFP_KERNEL))) { retval = -ENOMEM; goto out; } save_flags(flags); cli(); len = isdn_readbchan(drvidx, chidx, p, 0, count, &dev->drv[drvidx]->rcv_waitq[chidx]); *off += len; restore_flags(flags); if (copy_to_user(buf,p,len)) len = -EFAULT; kfree(p); retval = len; goto out; } if (minor <= ISDN_MINOR_CTRLMAX) { drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (drvidx < 0) { retval = -ENODEV; goto out; } if (!dev->drv[drvidx]->stavail) { if (file->f_flags & O_NONBLOCK) { retval = -EAGAIN; goto out; } interruptible_sleep_on(&(dev->drv[drvidx]->st_waitq)); } if (dev->drv[drvidx]->interface->readstat) { if (count > dev->drv[drvidx]->stavail) count = dev->drv[drvidx]->stavail; len = dev->drv[drvidx]->interface-> readstat(buf, count, 1, drvidx, isdn_minor2chan(minor)); } else { len = 0; } save_flags(flags); cli(); if (len) dev->drv[drvidx]->stavail -= len; else dev->drv[drvidx]->stavail = 0; restore_flags(flags); *off += len; retval = len; goto out; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) { retval = isdn_ppp_read(minor - ISDN_MINOR_PPP, file, buf, count); goto out; } #endif retval = -ENODEV; out: unlock_kernel(); return retval; } static ssize_t isdn_write(struct file *file, const char *buf, size_t count, loff_t * off) { uint minor = MINOR(file->f_dentry->d_inode->i_rdev); int drvidx; int chidx; int retval; if (off != &file->f_pos) return -ESPIPE; if (minor == ISDN_MINOR_STATUS) return -EPERM; if (!dev->drivers) return -ENODEV; lock_kernel(); if (minor <= ISDN_MINOR_BMAX) { printk(KERN_WARNING "isdn_write minor %d obsolete!\n", minor); drvidx = isdn_minor2drv(minor); if (drvidx < 0) { retval = -ENODEV; goto out; } if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) { retval = -ENODEV; goto out; } chidx = isdn_minor2chan(minor); while (isdn_writebuf_stub(drvidx, chidx, buf, count, 1) != count) interruptible_sleep_on(&dev->drv[drvidx]->snd_waitq[chidx]); retval = count; goto out; } if (minor <= ISDN_MINOR_CTRLMAX) { drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (drvidx < 0) { retval = -ENODEV; goto out; } /* * We want to use the isdnctrl device to load the firmware * if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; */ if (dev->drv[drvidx]->interface->writecmd) retval = dev->drv[drvidx]->interface-> writecmd(buf, count, 1, drvidx, isdn_minor2chan(minor)); else retval = count; goto out; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) { retval = isdn_ppp_write(minor - ISDN_MINOR_PPP, file, buf, count); goto out; } #endif retval = -ENODEV; out: unlock_kernel(); return retval; } static unsigned int isdn_poll(struct file *file, poll_table * wait) { unsigned int mask = 0; unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev); int drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); lock_kernel(); if (minor == ISDN_MINOR_STATUS) { poll_wait(file, &(dev->info_waitq), wait); /* mask = POLLOUT | POLLWRNORM; */ if (file->private_data) { mask |= POLLIN | POLLRDNORM; } goto out; } if (minor >= ISDN_MINOR_CTRL && minor <= ISDN_MINOR_CTRLMAX) { if (drvidx < 0) { /* driver deregistered while file open */ mask = POLLHUP; goto out; } poll_wait(file, &(dev->drv[drvidx]->st_waitq), wait); mask = POLLOUT | POLLWRNORM; if (dev->drv[drvidx]->stavail) { mask |= POLLIN | POLLRDNORM; } goto out; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) { mask = isdn_ppp_poll(file, wait); goto out; } #endif mask = POLLERR; out: unlock_kernel(); return mask; } static int isdn_ioctl(struct inode *inode, struct file *file, uint cmd, ulong arg) { uint minor = MINOR(inode->i_rdev); isdn_ctrl c; int drvidx; int chidx; int ret; int i; char *p; char *s; union iocpar { char name[10]; char bname[22]; isdn_ioctl_struct iocts; isdn_net_ioctl_phone phone; isdn_net_ioctl_cfg cfg; } iocpar; #define name iocpar.name #define bname iocpar.bname #define iocts iocpar.iocts #define phone iocpar.phone #define cfg iocpar.cfg if (minor == ISDN_MINOR_STATUS) { switch (cmd) { case IIOCGETDVR: return (TTY_DV + (NET_DV << 8) + (INF_DV << 16)); case IIOCGETCPS: if (arg) { ulong *p = (ulong *) arg; int i; if ((ret = verify_area(VERIFY_WRITE, (void *) arg, sizeof(ulong) * ISDN_MAX_CHANNELS * 2))) return ret; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { put_user(dev->ibytes[i], p++); put_user(dev->obytes[i], p++); } return 0; } else return -EINVAL; break; #ifdef CONFIG_NETDEVICES case IIOCNETGPN: /* Get peer phone number of a connected * isdn network interface */ if (arg) { if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone))) return -EFAULT; return isdn_net_getpeer(&phone, (isdn_net_ioctl_phone *) arg); } else return -EINVAL; #endif default: return -EINVAL; } } if (!dev->drivers) return -ENODEV; if (minor <= ISDN_MINOR_BMAX) { drvidx = isdn_minor2drv(minor); if (drvidx < 0) return -ENODEV; chidx = isdn_minor2chan(minor); if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) return -ENODEV; return 0; } if (minor <= ISDN_MINOR_CTRLMAX) { /* * isdn net devices manage lots of configuration variables as linked lists. * Those lists must only be manipulated from user space. Some of the ioctl's * service routines access user space and are not atomic. Therefor, ioctl's * manipulating the lists and ioctl's sleeping while accessing the lists * are serialized by means of a semaphore. */ switch (cmd) { case IIOCNETDWRSET: printk(KERN_INFO "INFO: ISDN_DW_ABC_EXTENSION not enabled\n"); return(-EINVAL); case IIOCNETLCR: printk(KERN_INFO "INFO: ISDN_ABC_LCR_SUPPORT not enabled\n"); return -ENODEV; #ifdef CONFIG_NETDEVICES case IIOCNETAIF: /* Add a network-interface */ if (arg) { if (copy_from_user(name, (char *) arg, sizeof(name))) return -EFAULT; s = name; } else { s = NULL; } ret = down_interruptible(&dev->sem); if( ret ) return ret; if ((s = isdn_net_new(s, NULL))) { if (copy_to_user((char *) arg, s, strlen(s) + 1)){ ret = -EFAULT; } else { ret = 0; } } else ret = -ENODEV; up(&dev->sem); return ret; case IIOCNETASL: /* Add a slave to a network-interface */ if (arg) { if (copy_from_user(bname, (char *) arg, sizeof(bname) - 1)) return -EFAULT; } else return -EINVAL; ret = down_interruptible(&dev->sem); if( ret ) return ret; if ((s = isdn_net_newslave(bname))) { if (copy_to_user((char *) arg, s, strlen(s) + 1)){ ret = -EFAULT; } else { ret = 0; } } else ret = -ENODEV; up(&dev->sem); return ret; case IIOCNETDIF: /* Delete a network-interface */ if (arg) { if (copy_from_user(name, (char *) arg, sizeof(name))) return -EFAULT; ret = down_interruptible(&dev->sem); if( ret ) return ret; ret = isdn_net_rm(name); up(&dev->sem); return ret; } else return -EINVAL; case IIOCNETSCF: /* Set configurable parameters of a network-interface */ if (arg) { if (copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg))) return -EFAULT; return isdn_net_setcfg(&cfg); } else return -EINVAL; case IIOCNETGCF: /* Get configurable parameters of a network-interface */ if (arg) { if (copy_from_user((char *) &cfg, (char *) arg, sizeof(cfg))) return -EFAULT; if (!(ret = isdn_net_getcfg(&cfg))) { if (copy_to_user((char *) arg, (char *) &cfg, sizeof(cfg))) return -EFAULT; } return ret; } else return -EINVAL; case IIOCNETANM: /* Add a phone-number to a network-interface */ if (arg) { if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone))) return -EFAULT; ret = down_interruptible(&dev->sem); if( ret ) return ret; ret = isdn_net_addphone(&phone); up(&dev->sem); return ret; } else return -EINVAL; case IIOCNETGNM: /* Get list of phone-numbers of a network-interface */ if (arg) { if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone))) return -EFAULT; ret = down_interruptible(&dev->sem); if( ret ) return ret; ret = isdn_net_getphones(&phone, (char *) arg); up(&dev->sem); return ret; } else return -EINVAL; case IIOCNETDNM: /* Delete a phone-number of a network-interface */ if (arg) { if (copy_from_user((char *) &phone, (char *) arg, sizeof(phone))) return -EFAULT; ret = down_interruptible(&dev->sem); if( ret ) return ret; ret = isdn_net_delphone(&phone); up(&dev->sem); return ret; } else return -EINVAL; case IIOCNETDIL: /* Force dialing of a network-interface */ if (arg) { if (copy_from_user(name, (char *) arg, sizeof(name))) return -EFAULT; return isdn_net_force_dial(name); } else return -EINVAL; #ifdef CONFIG_ISDN_PPP case IIOCNETALN: if (!arg) return -EINVAL; if (copy_from_user(name, (char *) arg, sizeof(name))) return -EFAULT; return isdn_ppp_dial_slave(name); case IIOCNETDLN: if (!arg) return -EINVAL; if (copy_from_user(name, (char *) arg, sizeof(name))) return -EFAULT; return isdn_ppp_hangup_slave(name); #endif case IIOCNETHUP: /* Force hangup of a network-interface */ if (!arg) return -EINVAL; if (copy_from_user(name, (char *) arg, sizeof(name))) return -EFAULT; return isdn_net_force_hangup(name); break; #endif /* CONFIG_NETDEVICES */ case IIOCSETVER: dev->net_verbose = arg; printk(KERN_INFO "isdn: Verbose-Level is %d\n", dev->net_verbose); return 0; case IIOCSETGST: if (arg) dev->global_flags |= ISDN_GLOBAL_STOPPED; else dev->global_flags &= ~ISDN_GLOBAL_STOPPED; printk(KERN_INFO "isdn: Global Mode %s\n", (dev->global_flags & ISDN_GLOBAL_STOPPED) ? "stopped" : "running"); return 0; case IIOCSETBRJ: drvidx = -1; if (arg) { int i; char *p; if (copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct))) return -EFAULT; if (strlen(iocts.drvid)) { if ((p = strchr(iocts.drvid, ','))) *p = 0; drvidx = -1; for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (!(strcmp(dev->drvid[i], iocts.drvid))) { drvidx = i; break; } } } if (drvidx == -1) return -ENODEV; if (iocts.arg) dev->drv[drvidx]->flags |= DRV_FLAG_REJBUS; else dev->drv[drvidx]->flags &= ~DRV_FLAG_REJBUS; return 0; case IIOCSIGPRF: dev->profd = current; return 0; break; case IIOCGETPRF: /* Get all Modem-Profiles */ if (arg) { char *p = (char *) arg; int i; if ((ret = verify_area(VERIFY_WRITE, (void *) arg, (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS))) return ret; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { if (copy_to_user(p, dev->mdm.info[i].emu.profile, ISDN_MODEM_NUMREG)) return -EFAULT; p += ISDN_MODEM_NUMREG; if (copy_to_user(p, dev->mdm.info[i].emu.pmsn, ISDN_MSNLEN)) return -EFAULT; p += ISDN_MSNLEN; if (copy_to_user(p, dev->mdm.info[i].emu.plmsn, ISDN_LMSNLEN)) return -EFAULT; p += ISDN_LMSNLEN; } return (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS; } else return -EINVAL; break; case IIOCSETPRF: /* Set all Modem-Profiles */ if (arg) { char *p = (char *) arg; int i; if ((ret = verify_area(VERIFY_READ, (void *) arg, (ISDN_MODEM_NUMREG + ISDN_MSNLEN + ISDN_LMSNLEN) * ISDN_MAX_CHANNELS))) return ret; for (i = 0; i < ISDN_MAX_CHANNELS; i++) { if (copy_from_user(dev->mdm.info[i].emu.profile, p, ISDN_MODEM_NUMREG)) return -EFAULT; p += ISDN_MODEM_NUMREG; if (copy_from_user(dev->mdm.info[i].emu.plmsn, p, ISDN_LMSNLEN)) return -EFAULT; p += ISDN_LMSNLEN; if (copy_from_user(dev->mdm.info[i].emu.pmsn, p, ISDN_MSNLEN)) return -EFAULT; p += ISDN_MSNLEN; } return 0; } else return -EINVAL; break; case IIOCSETMAP: case IIOCGETMAP: /* Set/Get MSN->EAZ-Mapping for a driver */ if (arg) { if (copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct))) return -EFAULT; if (strlen(iocts.drvid)) { drvidx = -1; for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (!(strcmp(dev->drvid[i], iocts.drvid))) { drvidx = i; break; } } else drvidx = 0; if (drvidx == -1) return -ENODEV; if (cmd == IIOCSETMAP) { int loop = 1; p = (char *) iocts.arg; i = 0; while (loop) { int j = 0; while (1) { if ((ret = verify_area(VERIFY_READ, p, 1))) return ret; get_user(bname[j], p++); switch (bname[j]) { case '\0': loop = 0; /* Fall through */ case ',': bname[j] = '\0'; strcpy(dev->drv[drvidx]->msn2eaz[i], bname); j = ISDN_MSNLEN; break; default: j++; } if (j >= ISDN_MSNLEN) break; } if (++i > 9) break; } } else { p = (char *) iocts.arg; for (i = 0; i < 10; i++) { sprintf(bname, "%s%s", strlen(dev->drv[drvidx]->msn2eaz[i]) ? dev->drv[drvidx]->msn2eaz[i] : "_", (i < 9) ? "," : "\0"); if (copy_to_user(p, bname, strlen(bname) + 1)) return -EFAULT; p += strlen(bname); } } return 0; } else return -EINVAL; case IIOCDBGVAR: if (arg) { if (copy_to_user((char *) arg, (char *) &dev, sizeof(ulong))) return -EFAULT; return 0; } else return -EINVAL; break; default: if ((cmd & IIOCDRVCTL) == IIOCDRVCTL) cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK; else return -EINVAL; if (arg) { int i; char *p; if (copy_from_user((char *) &iocts, (char *) arg, sizeof(isdn_ioctl_struct))) return -EFAULT; if (strlen(iocts.drvid)) { if ((p = strchr(iocts.drvid, ','))) *p = 0; drvidx = -1; for (i = 0; i < ISDN_MAX_DRIVERS; i++) if (!(strcmp(dev->drvid[i], iocts.drvid))) { drvidx = i; break; } } else drvidx = 0; if (drvidx == -1) return -ENODEV; if ((ret = verify_area(VERIFY_WRITE, (void *) arg, sizeof(isdn_ioctl_struct)))) return ret; c.driver = drvidx; c.command = ISDN_CMD_IOCTL; c.arg = cmd; memcpy(c.parm.num, (char *) &iocts.arg, sizeof(ulong)); ret = isdn_command(&c); memcpy((char *) &iocts.arg, c.parm.num, sizeof(ulong)); if (copy_to_user((char *) arg, &iocts, sizeof(isdn_ioctl_struct))) return -EFAULT; return ret; } else return -EINVAL; } } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) return (isdn_ppp_ioctl(minor - ISDN_MINOR_PPP, file, cmd, arg)); #endif return -ENODEV; #undef name #undef bname #undef iocts #undef phone #undef cfg } /* * Open the device code. */ static int isdn_open(struct inode *ino, struct file *filep) { uint minor = MINOR(ino->i_rdev); int drvidx; int chidx; int retval = -ENODEV; if (minor == ISDN_MINOR_STATUS) { infostruct *p; if ((p = kmalloc(sizeof(infostruct), GFP_KERNEL))) { p->next = (char *) dev->infochain; p->private = (char *) &(filep->private_data); dev->infochain = p; /* At opening we allow a single update */ filep->private_data = (char *) 1; retval = 0; goto out; } else { retval = -ENOMEM; goto out; } } if (!dev->channels) goto out; if (minor <= ISDN_MINOR_BMAX) { printk(KERN_WARNING "isdn_open minor %d obsolete!\n", minor); drvidx = isdn_minor2drv(minor); if (drvidx < 0) goto out; chidx = isdn_minor2chan(minor); if (!(dev->drv[drvidx]->flags & DRV_FLAG_RUNNING)) goto out; if (!(dev->drv[drvidx]->online & (1 << chidx))) goto out; isdn_lock_drivers(); retval = 0; goto out; } if (minor <= ISDN_MINOR_CTRLMAX) { drvidx = isdn_minor2drv(minor - ISDN_MINOR_CTRL); if (drvidx < 0) goto out; isdn_lock_drivers(); retval = 0; goto out; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) { retval = isdn_ppp_open(minor - ISDN_MINOR_PPP, filep); if (retval == 0) isdn_lock_drivers(); goto out; } #endif out: return retval; } static int isdn_close(struct inode *ino, struct file *filep) { uint minor = MINOR(ino->i_rdev); lock_kernel(); if (minor == ISDN_MINOR_STATUS) { infostruct *p = dev->infochain; infostruct *q = NULL; while (p) { if (p->private == (char *) &(filep->private_data)) { if (q) q->next = p->next; else dev->infochain = (infostruct *) (p->next); kfree(p); goto out; } q = p; p = (infostruct *) (p->next); } printk(KERN_WARNING "isdn: No private data while closing isdnctrl\n"); goto out; } isdn_unlock_drivers(); if (minor <= ISDN_MINOR_BMAX) goto out; if (minor <= ISDN_MINOR_CTRLMAX) { if (dev->profd == current) dev->profd = NULL; goto out; } #ifdef CONFIG_ISDN_PPP if (minor <= ISDN_MINOR_PPPMAX) isdn_ppp_release(minor - ISDN_MINOR_PPP, filep); #endif out: unlock_kernel(); return 0; } static struct file_operations isdn_fops = { owner: THIS_MODULE, llseek: no_llseek, read: isdn_read, write: isdn_write, poll: isdn_poll, ioctl: isdn_ioctl, open: isdn_open, release: isdn_close, }; char * isdn_map_eaz2msn(char *msn, int di) { driver *this = dev->drv[di]; int i; if (strlen(msn) == 1) { i = msn[0] - '0'; if ((i >= 0) && (i <= 9)) if (strlen(this->msn2eaz[i])) return (this->msn2eaz[i]); } return (msn); } /* * Find an unused ISDN-channel, whose feature-flags match the * given L2- and L3-protocols. */ #define L2V (~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038)) int isdn_get_free_channel(int usage, int l2_proto, int l3_proto, int pre_dev ,int pre_chan, char *msn) { int i; ulong flags; ulong features; ulong vfeatures; save_flags(flags); cli(); features = ((1 << l2_proto) | (0x10000 << l3_proto)); vfeatures = (((1 << l2_proto) | (0x10000 << l3_proto)) & ~(ISDN_FEATURE_L2_V11096|ISDN_FEATURE_L2_V11019|ISDN_FEATURE_L2_V11038)); /* If Layer-2 protocol is V.110, accept drivers with * transparent feature even if these don't support V.110 * because we can emulate this in linklevel. */ for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (USG_NONE(dev->usage[i]) && (dev->drvmap[i] != -1)) { int d = dev->drvmap[i]; if ((dev->usage[i] & ISDN_USAGE_EXCLUSIVE) && ((pre_dev != d) || (pre_chan != dev->chanmap[i]))) continue; if (!strcmp(isdn_map_eaz2msn(msn, d), "-")) continue; if (dev->usage[i] & ISDN_USAGE_DISABLED) continue; /* usage not allowed */ if (dev->drv[d]->flags & DRV_FLAG_RUNNING) { if (((dev->drv[d]->interface->features & features) == features) || (((dev->drv[d]->interface->features & vfeatures) == vfeatures) && (dev->drv[d]->interface->features & ISDN_FEATURE_L2_TRANS))) { if ((pre_dev < 0) || (pre_chan < 0)) { dev->usage[i] &= ISDN_USAGE_EXCLUSIVE; dev->usage[i] |= usage; isdn_info_update(); restore_flags(flags); return i; } else { if ((pre_dev == d) && (pre_chan == dev->chanmap[i])) { dev->usage[i] &= ISDN_USAGE_EXCLUSIVE; dev->usage[i] |= usage; isdn_info_update(); restore_flags(flags); return i; } } } } } restore_flags(flags); return -1; } /* * Set state of ISDN-channel to 'unused' */ void isdn_free_channel(int di, int ch, int usage) { int i; ulong flags; save_flags(flags); cli(); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if (((!usage) || ((dev->usage[i] & ISDN_USAGE_MASK) == usage)) && (dev->drvmap[i] == di) && (dev->chanmap[i] == ch)) { dev->usage[i] &= (ISDN_USAGE_NONE | ISDN_USAGE_EXCLUSIVE); strcpy(dev->num[i], "???"); dev->ibytes[i] = 0; dev->obytes[i] = 0; // 20.10.99 JIM, try to reinitialize v110 ! dev->v110emu[i] = 0; atomic_set(&(dev->v110use[i]), 0); isdn_v110_close(dev->v110[i]); dev->v110[i] = NULL; // 20.10.99 JIM, try to reinitialize v110 ! isdn_info_update(); skb_queue_purge(&dev->drv[di]->rpqueue[ch]); } restore_flags(flags); } /* * Cancel Exclusive-Flag for ISDN-channel */ void isdn_unexclusive_channel(int di, int ch) { int i; ulong flags; save_flags(flags); cli(); for (i = 0; i < ISDN_MAX_CHANNELS; i++) if ((dev->drvmap[i] == di) && (dev->chanmap[i] == ch)) { dev->usage[i] &= ~ISDN_USAGE_EXCLUSIVE; isdn_info_update(); restore_flags(flags); return; } restore_flags(flags); } /* * writebuf replacement for SKB_ABLE drivers */ static int isdn_writebuf_stub(int drvidx, int chan, const u_char * buf, int len, int user) { int ret; int hl = dev->drv[drvidx]->interface->hl_hdrlen; struct sk_buff *skb = alloc_skb(hl + len, GFP_ATOMIC); if (!skb) return 0; skb_reserve(skb, hl); if (user) copy_from_user(skb_put(skb, len), buf, len); else memcpy(skb_put(skb, len), buf, len); ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, 1, skb); if (ret <= 0) dev_kfree_skb(skb); if (ret > 0) dev->obytes[isdn_dc2minor(drvidx, chan)] += ret; return ret; } /* * Return: length of data on success, -ERRcode on failure. */ int isdn_writebuf_skb_stub(int drvidx, int chan, int ack, struct sk_buff *skb) { int ret; struct sk_buff *nskb = NULL; int v110_ret = skb->len; int idx = isdn_dc2minor(drvidx, chan); if (dev->v110[idx]) { atomic_inc(&dev->v110use[idx]); nskb = isdn_v110_encode(dev->v110[idx], skb); atomic_dec(&dev->v110use[idx]); if (!nskb) return 0; v110_ret = *((int *)nskb->data); skb_pull(nskb, sizeof(int)); if (!nskb->len) { dev_kfree_skb(nskb); return v110_ret; } /* V.110 must always be acknowledged */ ack = 1; ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, nskb); } else { int hl = dev->drv[drvidx]->interface->hl_hdrlen; if( skb_headroom(skb) < hl ){ /* * This should only occur when new HL driver with * increased hl_hdrlen was loaded after netdevice * was created and connected to the new driver. * * The V.110 branch (re-allocates on its own) does * not need this */ struct sk_buff * skb_tmp; skb_tmp = skb_realloc_headroom(skb, hl); printk(KERN_DEBUG "isdn_writebuf_skb_stub: reallocating headroom%s\n", skb_tmp ? "" : " failed"); if (!skb_tmp) return -ENOMEM; /* 0 better? */ ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb_tmp); if( ret > 0 ){ dev_kfree_skb(skb); } else { dev_kfree_skb(skb_tmp); } } else { ret = dev->drv[drvidx]->interface->writebuf_skb(drvidx, chan, ack, skb); } } if (ret > 0) { dev->obytes[idx] += ret; if (dev->v110[idx]) { atomic_inc(&dev->v110use[idx]); dev->v110[idx]->skbuser++; atomic_dec(&dev->v110use[idx]); /* For V.110 return unencoded data length */ ret = v110_ret; /* if the complete frame was send we free the skb; if not upper function will requeue the skb */ if (ret == skb->len) dev_kfree_skb(skb); } } else if (dev->v110[idx]) dev_kfree_skb(nskb); return ret; } int isdn_add_channels(driver *d, int drvidx, int n, int adding) { int j, k, m; ulong flags; init_waitqueue_head(&d->st_waitq); if (d->flags & DRV_FLAG_RUNNING) return -1; if (n < 1) return 0; m = (adding) ? d->channels + n : n; if (dev->channels + n > ISDN_MAX_CHANNELS) { printk(KERN_WARNING "register_isdn: Max. %d channels supported\n", ISDN_MAX_CHANNELS); return -1; } if ((adding) && (d->rcverr)) kfree(d->rcverr); if (!(d->rcverr = kmalloc(sizeof(int) * m, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rcverr\n"); return -1; } memset((char *) d->rcverr, 0, sizeof(int) * m); if ((adding) && (d->rcvcount)) kfree(d->rcvcount); if (!(d->rcvcount = kmalloc(sizeof(int) * m, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rcvcount\n"); if (!adding) kfree(d->rcverr); return -1; } memset((char *) d->rcvcount, 0, sizeof(int) * m); if ((adding) && (d->rpqueue)) { for (j = 0; j < d->channels; j++) skb_queue_purge(&d->rpqueue[j]); kfree(d->rpqueue); } if (!(d->rpqueue = kmalloc(sizeof(struct sk_buff_head) * m, GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc rpqueue\n"); if (!adding) { kfree(d->rcvcount); kfree(d->rcverr); } return -1; } for (j = 0; j < m; j++) { skb_queue_head_init(&d->rpqueue[j]); } if ((adding) && (d->rcv_waitq)) kfree(d->rcv_waitq); d->rcv_waitq = kmalloc(sizeof(wait_queue_head_t) * 2 * m, GFP_KERNEL); if (!d->rcv_waitq) { printk(KERN_WARNING "register_isdn: Could not alloc rcv_waitq\n"); if (!adding) { kfree(d->rpqueue); kfree(d->rcvcount); kfree(d->rcverr); } return -1; } d->snd_waitq = d->rcv_waitq + m; for (j = 0; j < m; j++) { init_waitqueue_head(&d->rcv_waitq[j]); init_waitqueue_head(&d->snd_waitq[j]); } dev->channels += n; save_flags(flags); cli(); for (j = d->channels; j < m; j++) for (k = 0; k < ISDN_MAX_CHANNELS; k++) if (dev->chanmap[k] < 0) { dev->chanmap[k] = j; dev->drvmap[k] = drvidx; isdn_register_devfs(k); break; } restore_flags(flags); d->channels = m; return 0; } /* * Low-level-driver registration */ static void set_global_features(void) { int drvidx; dev->global_features = 0; for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) { if (!dev->drv[drvidx]) continue; if (dev->drv[drvidx]->interface) dev->global_features |= dev->drv[drvidx]->interface->features; } } #ifdef CONFIG_ISDN_DIVERSION static char *map_drvname(int di) { if ((di < 0) || (di >= ISDN_MAX_DRIVERS)) return(NULL); return(dev->drvid[di]); /* driver name */ } /* map_drvname */ static int map_namedrv(char *id) { int i; for (i = 0; i < ISDN_MAX_DRIVERS; i++) { if (!strcmp(dev->drvid[i],id)) return(i); } return(-1); } /* map_namedrv */ int DIVERT_REG_NAME(isdn_divert_if *i_div) { if (i_div->if_magic != DIVERT_IF_MAGIC) return(DIVERT_VER_ERR); switch (i_div->cmd) { case DIVERT_CMD_REL: if (divert_if != i_div) return(DIVERT_REL_ERR); divert_if = NULL; /* free interface */ MOD_DEC_USE_COUNT; return(DIVERT_NO_ERR); case DIVERT_CMD_REG: if (divert_if) return(DIVERT_REG_ERR); i_div->ll_cmd = isdn_command; /* set command function */ i_div->drv_to_name = map_drvname; i_div->name_to_drv = map_namedrv; MOD_INC_USE_COUNT; divert_if = i_div; /* remember interface */ return(DIVERT_NO_ERR); default: return(DIVERT_CMD_ERR); } } /* DIVERT_REG_NAME */ EXPORT_SYMBOL(DIVERT_REG_NAME); #endif /* CONFIG_ISDN_DIVERSION */ EXPORT_SYMBOL(register_isdn); #ifdef CONFIG_ISDN_PPP EXPORT_SYMBOL(isdn_ppp_register_compressor); EXPORT_SYMBOL(isdn_ppp_unregister_compressor); #endif int register_isdn(isdn_if * i) { driver *d; int j; ulong flags; int drvidx; if (dev->drivers >= ISDN_MAX_DRIVERS) { printk(KERN_WARNING "register_isdn: Max. %d drivers supported\n", ISDN_MAX_DRIVERS); return 0; } if (!i->writebuf_skb) { printk(KERN_WARNING "register_isdn: No write routine given.\n"); return 0; } if (!(d = kmalloc(sizeof(driver), GFP_KERNEL))) { printk(KERN_WARNING "register_isdn: Could not alloc driver-struct\n"); return 0; } memset((char *) d, 0, sizeof(driver)); d->maxbufsize = i->maxbufsize; d->pktcount = 0; d->stavail = 0; d->flags = DRV_FLAG_LOADED; d->online = 0; d->interface = i; d->channels = 0; for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++) if (!dev->drv[drvidx]) break; if (isdn_add_channels(d, drvidx, i->channels, 0)) { kfree(d); return 0; } i->channels = drvidx; i->rcvcallb_skb = isdn_receive_skb_callback; i->statcallb = isdn_status_callback; if (!strlen(i->id)) sprintf(i->id, "line%d", drvidx); save_flags(flags); cli(); for (j = 0; j < drvidx; j++) if (!strcmp(i->id, dev->drvid[j])) sprintf(i->id, "line%d", drvidx); dev->drv[drvidx] = d; strcpy(dev->drvid[drvidx], i->id); isdn_info_update(); dev->drivers++; set_global_features(); restore_flags(flags); return 1; } /* ***************************************************************************** * And now the modules code. ***************************************************************************** */ static char * isdn_getrev(const char *revision) { char *rev; char *p; if ((p = strchr(revision, ':'))) { rev = p + 2; p = strchr(rev, '$'); *--p = 0; } else rev = "???"; return rev; } #ifdef CONFIG_DEVFS_FS static devfs_handle_t devfs_handle; static void isdn_register_devfs(int k) { char buf[11]; sprintf (buf, "isdn%d", k); dev->devfs_handle_isdnX[k] = devfs_register (devfs_handle, buf, DEVFS_FL_DEFAULT, ISDN_MAJOR, ISDN_MINOR_B + k,0600 | S_IFCHR, &isdn_fops, NULL); sprintf (buf, "isdnctrl%d", k); dev->devfs_handle_isdnctrlX[k] = devfs_register (devfs_handle, buf, DEVFS_FL_DEFAULT, ISDN_MAJOR, ISDN_MINOR_CTRL + k, 0600 | S_IFCHR, &isdn_fops, NULL); } static void isdn_unregister_devfs(int k) { devfs_unregister (dev->devfs_handle_isdnX[k]); devfs_unregister (dev->devfs_handle_isdnctrlX[k]); } static void isdn_init_devfs(void) { # ifdef CONFIG_ISDN_PPP int i; # endif devfs_handle = devfs_mk_dir (NULL, "isdn", NULL); # ifdef CONFIG_ISDN_PPP for (i = 0; i < ISDN_MAX_CHANNELS; i++) { char buf[8]; sprintf (buf, "ippp%d", i); dev->devfs_handle_ipppX[i] = devfs_register (devfs_handle, buf, DEVFS_FL_DEFAULT, ISDN_MAJOR, ISDN_MINOR_PPP + i, 0600 | S_IFCHR, &isdn_fops, NULL); } # endif dev->devfs_handle_isdninfo = devfs_register (devfs_handle, "isdninfo", DEVFS_FL_DEFAULT, ISDN_MAJOR, ISDN_MINOR_STATUS, 0600 | S_IFCHR, &isdn_fops, NULL); dev->devfs_handle_isdnctrl = devfs_register (devfs_handle, "isdnctrl", DEVFS_FL_DEFAULT, ISDN_MAJOR, ISDN_MINOR_CTRL, 0600 | S_IFCHR, &isdn_fops, NULL); } static void isdn_cleanup_devfs(void) { # ifdef CONFIG_ISDN_PPP int i; for (i = 0; i < ISDN_MAX_CHANNELS; i++) devfs_unregister (dev->devfs_handle_ipppX[i]); # endif devfs_unregister (dev->devfs_handle_isdninfo); devfs_unregister (dev->devfs_handle_isdnctrl); devfs_unregister (devfs_handle); } #else /* CONFIG_DEVFS_FS */ static void isdn_register_devfs(int dummy) { return; } static void isdn_unregister_devfs(int dummy) { return; } static void isdn_init_devfs(void) { return; } static void isdn_cleanup_devfs(void) { return; } #endif /* CONFIG_DEVFS_FS */ /* * Allocate and initialize all data, register modem-devices */ static int __init isdn_init(void) { int i; char tmprev[50]; if (!(dev = (isdn_dev *) vmalloc(sizeof(isdn_dev)))) { printk(KERN_WARNING "isdn: Could not allocate device-struct.\n"); return -EIO; } memset((char *) dev, 0, sizeof(isdn_dev)); init_timer(&dev->timer); dev->timer.function = isdn_timer_funct; init_MUTEX(&dev->sem); init_waitqueue_head(&dev->info_waitq); for (i = 0; i < ISDN_MAX_CHANNELS; i++) { dev->drvmap[i] = -1; dev->chanmap[i] = -1; dev->m_idx[i] = -1; strcpy(dev->num[i], "???"); init_waitqueue_head(&dev->mdm.info[i].open_wait); init_waitqueue_head(&dev->mdm.info[i].close_wait); } if (devfs_register_chrdev(ISDN_MAJOR, "isdn", &isdn_fops)) { printk(KERN_WARNING "isdn: Could not register control devices\n"); vfree(dev); return -EIO; } isdn_init_devfs(); if ((i = isdn_tty_modem_init()) < 0) { printk(KERN_WARNING "isdn: Could not register tty devices\n"); if (i == -3) tty_unregister_driver(&dev->mdm.cua_modem); if (i <= -2) tty_unregister_driver(&dev->mdm.tty_modem); vfree(dev); isdn_cleanup_devfs(); devfs_unregister_chrdev(ISDN_MAJOR, "isdn"); return -EIO; } #ifdef CONFIG_ISDN_PPP if (isdn_ppp_init() < 0) { printk(KERN_WARNING "isdn: Could not create PPP-device-structs\n"); tty_unregister_driver(&dev->mdm.tty_modem); tty_unregister_driver(&dev->mdm.cua_modem); for (i = 0; i < ISDN_MAX_CHANNELS; i++) kfree(dev->mdm.info[i].xmit_buf - 4); isdn_cleanup_devfs(); devfs_unregister_chrdev(ISDN_MAJOR, "isdn"); vfree(dev); return -EIO; } #endif /* CONFIG_ISDN_PPP */ strcpy(tmprev, isdn_revision); printk(KERN_NOTICE "ISDN subsystem Rev: %s/", isdn_getrev(tmprev)); strcpy(tmprev, isdn_tty_revision); printk("%s/", isdn_getrev(tmprev)); strcpy(tmprev, isdn_net_revision); printk("%s/", isdn_getrev(tmprev)); strcpy(tmprev, isdn_ppp_revision); printk("%s/", isdn_getrev(tmprev)); strcpy(tmprev, isdn_audio_revision); printk("%s/", isdn_getrev(tmprev)); strcpy(tmprev, isdn_v110_revision); printk("%s", isdn_getrev(tmprev)); #ifdef MODULE printk(" loaded\n"); #else printk("\n"); #endif isdn_info_update(); return 0; } /* * Unload module */ static void __exit isdn_exit(void) { unsigned long flags; int i; #ifdef CONFIG_ISDN_PPP isdn_ppp_cleanup(); #endif save_flags(flags); cli(); if (isdn_net_rmall() < 0) { printk(KERN_WARNING "isdn: net-device busy, remove cancelled\n"); restore_flags(flags); return; } if (tty_unregister_driver(&dev->mdm.tty_modem)) { printk(KERN_WARNING "isdn: ttyI-device busy, remove cancelled\n"); restore_flags(flags); return; } if (tty_unregister_driver(&dev->mdm.cua_modem)) { printk(KERN_WARNING "isdn: cui-device busy, remove cancelled\n"); restore_flags(flags); return; } for (i = 0; i < ISDN_MAX_CHANNELS; i++) { isdn_tty_cleanup_xmit(&dev->mdm.info[i]); kfree(dev->mdm.info[i].xmit_buf - 4); #ifdef CONFIG_ISDN_TTY_FAX kfree(dev->mdm.info[i].fax); #endif } if (devfs_unregister_chrdev(ISDN_MAJOR, "isdn") != 0) { printk(KERN_WARNING "isdn: controldevice busy, remove cancelled\n"); restore_flags(flags); } else { isdn_cleanup_devfs(); del_timer(&dev->timer); restore_flags(flags); /* call vfree with interrupts enabled, else it will hang */ vfree(dev); printk(KERN_NOTICE "ISDN-subsystem unloaded\n"); } } module_init(isdn_init); module_exit(isdn_exit);
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