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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [isdn/] [divert/] [isdn_divert.c] - Rev 1275
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/* $Id: isdn_divert.c,v 1.1.1.1 2004-04-15 02:05:30 phoenix Exp $ * * DSS1 main diversion supplementary handling for i4l. * * Copyright 1999 by Werner Cornelius (werner@isdn4linux.de) * * This software may be used and distributed according to the terms * of the GNU General Public License, incorporated herein by reference. * */ #include <linux/version.h> #include <linux/proc_fs.h> #include "isdn_divert.h" /**********************************/ /* structure keeping calling info */ /**********************************/ struct call_struc { isdn_ctrl ics; /* delivered setup + driver parameters */ ulong divert_id; /* Id delivered to user */ unsigned char akt_state; /* actual state */ char deflect_dest[35]; /* deflection destination */ struct timer_list timer; /* timer control structure */ char info[90]; /* device info output */ struct call_struc *next; /* pointer to next entry */ struct call_struc *prev; }; /********************************************/ /* structure keeping deflection table entry */ /********************************************/ struct deflect_struc { struct deflect_struc *next,*prev; divert_rule rule; /* used rule */ }; /*****************************************/ /* variables for main diversion services */ /*****************************************/ /* diversion/deflection processes */ static struct call_struc *divert_head = NULL; /* head of remembered entrys */ static ulong next_id = 1; /* next info id */ static struct deflect_struc *table_head = NULL; static struct deflect_struc *table_tail = NULL; static unsigned char extern_wait_max = 4; /* maximum wait in s for external process */ /***************************/ /* timer callback function */ /***************************/ static void deflect_timer_expire(ulong arg) { unsigned long flags; struct call_struc *cs = (struct call_struc *) arg; save_flags(flags); cli(); del_timer(&cs->timer); /* delete active timer */ restore_flags(flags); switch(cs->akt_state) { case DEFLECT_PROCEED: cs->ics.command = ISDN_CMD_HANGUP; /* cancel action */ divert_if.ll_cmd(&cs->ics); save_flags(flags); cli(); cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */ cs->timer.expires = jiffies + (HZ * AUTODEL_TIME); add_timer(&cs->timer); restore_flags(flags); break; case DEFLECT_ALERT: cs->ics.command = ISDN_CMD_REDIR; /* protocol */ strcpy(cs->ics.parm.setup.phone,cs->deflect_dest); strcpy(cs->ics.parm.setup.eazmsn,"Testtext delayed"); divert_if.ll_cmd(&cs->ics); save_flags(flags); cli(); cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */ cs->timer.expires = jiffies + (HZ * AUTODEL_TIME); add_timer(&cs->timer); restore_flags(flags); break; case DEFLECT_AUTODEL: default: save_flags(flags); cli(); if (cs->prev) cs->prev->next = cs->next; /* forward link */ else divert_head = cs->next; if (cs->next) cs->next->prev = cs->prev; /* back link */ restore_flags(flags); kfree(cs); return; } /* switch */ } /* deflect_timer_func */ /*****************************************/ /* handle call forwarding de/activations */ /* 0 = deact, 1 = act, 2 = interrogate */ /*****************************************/ int cf_command(int drvid, int mode, u_char proc, char *msn, u_char service, char *fwd_nr, ulong *procid) { unsigned long flags; int retval,msnlen; int fwd_len; char *p,*ielenp,tmp[60]; struct call_struc *cs; if (strchr(msn,'.')) return(-EINVAL); /* subaddress not allowed in msn */ if ((proc & 0x7F) > 2) return(-EINVAL); proc &= 3; p = tmp; *p++ = 0x30; /* enumeration */ ielenp = p++; /* remember total length position */ *p++ = 0xa; /* proc tag */ *p++ = 1; /* length */ *p++ = proc & 0x7F; /* procedure to de/activate/interrogate */ *p++ = 0xa; /* service tag */ *p++ = 1; /* length */ *p++ = service; /* service to handle */ if (mode == 1) { if (!*fwd_nr) return(-EINVAL); /* destination missing */ if (strchr(fwd_nr,'.')) return(-EINVAL); /* subaddress not allowed */ fwd_len = strlen(fwd_nr); *p++ = 0x30; /* number enumeration */ *p++ = fwd_len + 2; /* complete forward to len */ *p++ = 0x80; /* fwd to nr */ *p++ = fwd_len; /* length of number */ strcpy(p,fwd_nr); /* copy number */ p += fwd_len; /* pointer beyond fwd */ } /* activate */ msnlen = strlen(msn); *p++ = 0x80; /* msn number */ if (msnlen > 1) { *p++ = msnlen; /* length */ strcpy(p,msn); p += msnlen; } else *p++ = 0; *ielenp = p - ielenp - 1; /* set total IE length */ /* allocate mem for information struct */ if (!(cs = (struct call_struc *) kmalloc(sizeof(struct call_struc), GFP_ATOMIC))) return(-ENOMEM); /* no memory */ init_timer(&cs->timer); cs->info[0] = '\0'; cs->timer.function = deflect_timer_expire; cs->timer.data = (ulong) cs; /* pointer to own structure */ cs->ics.driver = drvid; cs->ics.command = ISDN_CMD_PROT_IO; /* protocol specific io */ cs->ics.arg = DSS1_CMD_INVOKE; /* invoke supplementary service */ cs->ics.parm.dss1_io.proc = (mode == 1) ? 7: (mode == 2) ? 11:8; /* operation */ cs->ics.parm.dss1_io.timeout = 4000; /* from ETS 300 207-1 */ cs->ics.parm.dss1_io.datalen = p - tmp; /* total len */ cs->ics.parm.dss1_io.data = tmp; /* start of buffer */ save_flags(flags); cli(); cs->ics.parm.dss1_io.ll_id = next_id++; /* id for callback */ restore_flags(flags); *procid = cs->ics.parm.dss1_io.ll_id; sprintf(cs->info,"%d 0x%lx %s%s 0 %s %02x %d%s%s\n", (!mode ) ? DIVERT_DEACTIVATE : (mode == 1) ? DIVERT_ACTIVATE : DIVERT_REPORT, cs->ics.parm.dss1_io.ll_id, (mode != 2) ? "" : "0 ", divert_if.drv_to_name(cs->ics.driver), msn, service & 0xFF, proc, (mode != 1) ? "" : " 0 ", (mode != 1) ? "" : fwd_nr); retval = divert_if.ll_cmd(&cs->ics); /* excute command */ if (!retval) { cs->prev = NULL; save_flags(flags); cli(); cs->next = divert_head; divert_head = cs; restore_flags(flags); } else kfree(cs); return(retval); } /* cf_command */ /****************************************/ /* handle a external deflection command */ /****************************************/ int deflect_extern_action(u_char cmd, ulong callid, char *to_nr) { struct call_struc *cs; isdn_ctrl ic; unsigned long flags; int i; if ((cmd & 0x7F) > 2) return(-EINVAL); /* invalid command */ cs = divert_head; /* start of parameter list */ while (cs) { if (cs->divert_id == callid) break; /* found */ cs = cs->next; } /* search entry */ if (!cs) return(-EINVAL); /* invalid callid */ ic.driver = cs->ics.driver; ic.arg = cs->ics.arg; i = -EINVAL; if (cs->akt_state == DEFLECT_AUTODEL) return(i); /* no valid call */ switch (cmd & 0x7F) { case 0: /* hangup */ del_timer(&cs->timer); ic.command = ISDN_CMD_HANGUP; i = divert_if.ll_cmd(&ic); save_flags(flags); cli(); cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */ cs->timer.expires = jiffies + (HZ * AUTODEL_TIME); add_timer(&cs->timer); restore_flags(flags); break; case 1: /* alert */ if (cs->akt_state == DEFLECT_ALERT) return(0); cmd &= 0x7F; /* never wait */ del_timer(&cs->timer); ic.command = ISDN_CMD_ALERT; if ((i = divert_if.ll_cmd(&ic))) { save_flags(flags); cli(); cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */ cs->timer.expires = jiffies + (HZ * AUTODEL_TIME); add_timer(&cs->timer); restore_flags(flags); } else cs->akt_state = DEFLECT_ALERT; break; case 2: /* redir */ del_timer(&cs->timer); strcpy(cs->ics.parm.setup.phone, to_nr); strcpy(cs->ics.parm.setup.eazmsn, "Testtext manual"); ic.command = ISDN_CMD_REDIR; if ((i = divert_if.ll_cmd(&ic))) { save_flags(flags); cli(); cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */ cs->timer.expires = jiffies + (HZ * AUTODEL_TIME); add_timer(&cs->timer); restore_flags(flags); } else cs->akt_state = DEFLECT_ALERT; break; } /* switch */ return(i); } /* deflect_extern_action */ /********************************/ /* insert a new rule before idx */ /********************************/ int insertrule(int idx, divert_rule *newrule) { struct deflect_struc *ds,*ds1=NULL; unsigned long flags; if (!(ds = (struct deflect_struc *) kmalloc(sizeof(struct deflect_struc), GFP_KERNEL))) return(-ENOMEM); /* no memory */ ds->rule = *newrule; /* set rule */ save_flags(flags); cli(); if (idx >= 0) { ds1 = table_head; while ((ds1) && (idx > 0)) { idx--; ds1 = ds1->next; } if (!ds1) idx = -1; } if (idx < 0) { ds->prev = table_tail; /* previous entry */ ds->next = NULL; /* end of chain */ if (ds->prev) ds->prev->next = ds; /* last forward */ else table_head = ds; /* is first entry */ table_tail = ds; /* end of queue */ } else { ds->next = ds1; /* next entry */ ds->prev = ds1->prev; /* prev entry */ ds1->prev = ds; /* backward chain old element */ if (!ds->prev) table_head = ds; /* first element */ } restore_flags(flags); return(0); } /* insertrule */ /***********************************/ /* delete the rule at position idx */ /***********************************/ int deleterule(int idx) { struct deflect_struc *ds,*ds1; unsigned long flags; if (idx < 0) { save_flags(flags); cli(); ds = table_head; table_head = NULL; table_tail = NULL; restore_flags(flags); while (ds) { ds1 = ds; ds = ds->next; kfree(ds1); } return(0); } save_flags(flags); cli(); ds = table_head; while ((ds) && (idx > 0)) { idx--; ds = ds->next; } if (!ds) { restore_flags(flags); return(-EINVAL); } if (ds->next) ds->next->prev = ds->prev; /* backward chain */ else table_tail = ds->prev; /* end of chain */ if (ds->prev) ds->prev->next = ds->next; /* forward chain */ else table_head = ds->next; /* start of chain */ restore_flags(flags); kfree(ds); return(0); } /* deleterule */ /*******************************************/ /* get a pointer to a specific rule number */ /*******************************************/ divert_rule *getruleptr(int idx) { struct deflect_struc *ds = table_head; if (idx < 0) return(NULL); while ((ds) && (idx >= 0)) { if (!(idx--)) { return(&ds->rule); break; } ds = ds->next; } return(NULL); } /* getruleptr */ /*************************************************/ /* called from common module on an incoming call */ /*************************************************/ int isdn_divert_icall(isdn_ctrl *ic) { int retval = 0; unsigned long flags; struct call_struc *cs = NULL; struct deflect_struc *dv; char *p,*p1; u_char accept; /* first check the internal deflection table */ for (dv = table_head; dv ; dv = dv->next ) { /* scan table */ if (((dv->rule.callopt == 1) && (ic->command == ISDN_STAT_ICALLW)) || ((dv->rule.callopt == 2) && (ic->command == ISDN_STAT_ICALL))) continue; /* call option check */ if (!(dv->rule.drvid & (1L << ic->driver))) continue; /* driver not matching */ if ((dv->rule.si1) && (dv->rule.si1 != ic->parm.setup.si1)) continue; /* si1 not matching */ if ((dv->rule.si2) && (dv->rule.si2 != ic->parm.setup.si2)) continue; /* si2 not matching */ p = dv->rule.my_msn; p1 = ic->parm.setup.eazmsn; accept = 0; while (*p) { /* complete compare */ if (*p == '-') { accept = 1; /* call accepted */ break; } if (*p++ != *p1++) break; /* not accepted */ if ((!*p) && (!*p1)) accept = 1; } /* complete compare */ if (!accept) continue; /* not accepted */ if ((strcmp(dv->rule.caller,"0")) || (ic->parm.setup.phone[0])) { p = dv->rule.caller; p1 = ic->parm.setup.phone; accept = 0; while (*p) { /* complete compare */ if (*p == '-') { accept = 1; /* call accepted */ break; } if (*p++ != *p1++) break; /* not accepted */ if ((!*p) && (!*p1)) accept = 1; } /* complete compare */ if (!accept) continue; /* not accepted */ } switch (dv->rule.action) { case DEFLECT_IGNORE: return(0); break; case DEFLECT_ALERT: case DEFLECT_PROCEED: case DEFLECT_REPORT: case DEFLECT_REJECT: if (dv->rule.action == DEFLECT_PROCEED) if ((!if_used) || ((!extern_wait_max) && (!dv->rule.waittime))) return(0); /* no external deflection needed */ if (!(cs = (struct call_struc *) kmalloc(sizeof(struct call_struc), GFP_ATOMIC))) return(0); /* no memory */ init_timer(&cs->timer); cs->info[0] = '\0'; cs->timer.function = deflect_timer_expire; cs->timer.data = (ulong) cs; /* pointer to own structure */ cs->ics = *ic; /* copy incoming data */ if (!cs->ics.parm.setup.phone[0]) strcpy(cs->ics.parm.setup.phone,"0"); if (!cs->ics.parm.setup.eazmsn[0]) strcpy(cs->ics.parm.setup.eazmsn,"0"); cs->ics.parm.setup.screen = dv->rule.screen; if (dv->rule.waittime) cs->timer.expires = jiffies + (HZ * dv->rule.waittime); else if (dv->rule.action == DEFLECT_PROCEED) cs->timer.expires = jiffies + (HZ * extern_wait_max); else cs->timer.expires = 0; cs->akt_state = dv->rule.action; save_flags(flags); cli(); cs->divert_id = next_id++; /* new sequence number */ restore_flags(flags); cs->prev = NULL; if (cs->akt_state == DEFLECT_ALERT) { strcpy(cs->deflect_dest,dv->rule.to_nr); if (!cs->timer.expires) { strcpy(ic->parm.setup.eazmsn,"Testtext direct"); ic->parm.setup.screen = dv->rule.screen; strcpy(ic->parm.setup.phone,dv->rule.to_nr); cs->akt_state = DEFLECT_AUTODEL; /* delete after timeout */ cs->timer.expires = jiffies + (HZ * AUTODEL_TIME); retval = 5; } else retval = 1; /* alerting */ } else { cs->deflect_dest[0] = '\0'; retval = 4; /* only proceed */ } sprintf(cs->info,"%d 0x%lx %s %s %s %s 0x%x 0x%x %d %d %s\n", cs->akt_state, cs->divert_id, divert_if.drv_to_name(cs->ics.driver), (ic->command == ISDN_STAT_ICALLW) ? "1":"0", cs->ics.parm.setup.phone, cs->ics.parm.setup.eazmsn, cs->ics.parm.setup.si1, cs->ics.parm.setup.si2, cs->ics.parm.setup.screen, dv->rule.waittime, cs->deflect_dest); if ((dv->rule.action == DEFLECT_REPORT) || (dv->rule.action == DEFLECT_REJECT)) { put_info_buffer(cs->info); kfree(cs); /* remove */ return((dv->rule.action == DEFLECT_REPORT) ? 0:2); /* nothing to do */ } break; default: return(0); /* ignore call */ break; } /* switch action */ break; } /* scan_table */ if (cs) { cs->prev = NULL; save_flags(flags); cli(); cs->next = divert_head; divert_head = cs; if (cs->timer.expires) add_timer(&cs->timer); restore_flags(flags); put_info_buffer(cs->info); return(retval); } else return(0); } /* isdn_divert_icall */ void deleteprocs(void) { struct call_struc *cs, *cs1; unsigned long flags; save_flags(flags); cli(); cs = divert_head; divert_head = NULL; while (cs) { del_timer(&cs->timer); cs1 = cs; cs = cs->next; kfree(cs1); } restore_flags(flags); } /* deleteprocs */ /****************************************************/ /* put a address including address type into buffer */ /****************************************************/ int put_address(char *st, u_char *p, int len) { u_char retval = 0; u_char adr_typ = 0; /* network standard */ if (len < 2) return(retval); if (*p == 0xA1) { retval = *(++p) + 2; /* total length */ if (retval > len) return(0); /* too short */ len = retval - 2; /* remaining length */ if (len < 3) return(0); if ((*(++p) != 0x0A) || (*(++p) != 1)) return(0); adr_typ = *(++p); len -= 3; p++; if (len < 2) return(0); if (*p++ != 0x12) return(0); if (*p > len) return(0); /* check number length */ len = *p++; } else if (*p == 0x80) { retval = *(++p) + 2; /* total length */ if (retval > len) return(0); len = retval - 2; p++; } else return(0); /* invalid address information */ sprintf(st,"%d ",adr_typ); st += strlen(st); if (!len) *st++ = '-'; else while (len--) *st++ = *p++; *st = '\0'; return(retval); } /* put_address */ /*************************************/ /* report a succesfull interrogation */ /*************************************/ int interrogate_success(isdn_ctrl *ic, struct call_struc *cs) { char *src = ic->parm.dss1_io.data; int restlen = ic->parm.dss1_io.datalen; int cnt = 1; u_char n,n1; char st[90], *p, *stp; if (restlen < 2) return(-100); /* frame too short */ if (*src++ != 0x30) return(-101); if ((n = *src++) > 0x81) return(-102); /* invalid length field */ restlen -= 2; /* remaining bytes */ if (n == 0x80) { if (restlen < 2) return(-103); if ((*(src+restlen-1)) || (*(src+restlen-2))) return(-104); restlen -= 2; } else if ( n == 0x81) { n = *src++; restlen--; if (n > restlen) return(-105); restlen = n; } else if (n > restlen) return(-106); else restlen = n; /* standard format */ if (restlen < 3) return(-107); /* no procedure */ if ((*src++ != 2) || (*src++ != 1) || (*src++ != 0x0B)) return(-108); restlen -= 3; if (restlen < 2) return(-109); /* list missing */ if (*src == 0x31) { src++; if ((n = *src++) > 0x81) return(-110); /* invalid length field */ restlen -= 2; /* remaining bytes */ if (n == 0x80) { if (restlen < 2) return(-111); if ((*(src+restlen-1)) || (*(src+restlen-2))) return(-112); restlen -= 2; } else if ( n == 0x81) { n = *src++; restlen--; if (n > restlen) return(-113); restlen = n; } else if (n > restlen) return(-114); else restlen = n; /* standard format */ } /* result list header */ while (restlen >= 2) { stp = st; sprintf(stp,"%d 0x%lx %d %s ",DIVERT_REPORT, ic->parm.dss1_io.ll_id, cnt++,divert_if.drv_to_name(ic->driver)); stp += strlen(stp); if (*src++ != 0x30) return(-115); /* invalid enum */ n = *src++; restlen -= 2; if (n > restlen) return(-116); /* enum length wrong */ restlen -= n; p = src; /* one entry */ src += n; if (!(n1 = put_address(stp,p,n & 0xFF))) continue; stp += strlen(stp); p += n1; n -= n1; if (n < 6) continue; /* no service and proc */ if ((*p++ != 0x0A) || (*p++ != 1)) continue; sprintf(stp," 0x%02x ",(*p++) & 0xFF); stp += strlen(stp); if ((*p++ != 0x0A) || (*p++ != 1)) continue; sprintf(stp,"%d ",(*p++) & 0xFF); stp += strlen(stp); n -= 6; if (n > 2) { if (*p++ != 0x30) continue; if (*p > (n-2)) continue; n = *p++; if (!(n1 = put_address(stp,p,n & 0xFF))) continue; stp += strlen(stp); } sprintf(stp,"\n"); put_info_buffer(st); } /* while restlen */ if (restlen) return(-117); return(0); } /* interrogate_success */ /*********************************************/ /* callback for protocol specific extensions */ /*********************************************/ int prot_stat_callback(isdn_ctrl *ic) { struct call_struc *cs, *cs1; int i; unsigned long flags; cs = divert_head; /* start of list */ cs1 = NULL; while (cs) { if (ic->driver == cs->ics.driver) { switch (cs->ics.arg) { case DSS1_CMD_INVOKE: if ((cs->ics.parm.dss1_io.ll_id == ic->parm.dss1_io.ll_id) && (cs->ics.parm.dss1_io.hl_id == ic->parm.dss1_io.hl_id)) { switch (ic->arg) { case DSS1_STAT_INVOKE_ERR: sprintf(cs->info,"128 0x%lx 0x%x\n", ic->parm.dss1_io.ll_id, ic->parm.dss1_io.timeout); put_info_buffer(cs->info); break; case DSS1_STAT_INVOKE_RES: switch (cs->ics.parm.dss1_io.proc) { case 7: case 8: put_info_buffer(cs->info); break; case 11: i = interrogate_success(ic,cs); if (i) sprintf(cs->info,"%d 0x%lx %d\n",DIVERT_REPORT, ic->parm.dss1_io.ll_id,i); put_info_buffer(cs->info); break; default: printk(KERN_WARNING "dss1_divert: unknown proc %d\n",cs->ics.parm.dss1_io.proc); break; } break; default: printk(KERN_WARNING "dss1_divert unknown invoke answer %lx\n",ic->arg); break; } cs1 = cs; /* remember structure */ cs = NULL; continue; /* abort search */ } /* id found */ break; case DSS1_CMD_INVOKE_ABORT: printk(KERN_WARNING "dss1_divert unhandled invoke abort\n"); break; default: printk(KERN_WARNING "dss1_divert unknown cmd 0x%lx\n",cs->ics.arg); break; } /* switch ics.arg */ cs = cs->next; } /* driver ok */ } if (!cs1) { printk(KERN_WARNING "dss1_divert unhandled process\n"); return(0); } if (cs1->ics.driver == -1) { save_flags(flags); cli(); del_timer(&cs1->timer); if (cs1->prev) cs1->prev->next = cs1->next; /* forward link */ else divert_head = cs1->next; if (cs1->next) cs1->next->prev = cs1->prev; /* back link */ restore_flags(flags); kfree(cs1); } return(0); } /* prot_stat_callback */ /***************************/ /* status callback from HL */ /***************************/ int isdn_divert_stat_callback(isdn_ctrl *ic) { struct call_struc *cs, *cs1; unsigned long flags; int retval; retval = -1; cs = divert_head; /* start of list */ while (cs) { if ((ic->driver == cs->ics.driver) && (ic->arg == cs->ics.arg)) { switch (ic->command) { case ISDN_STAT_DHUP: sprintf(cs->info,"129 0x%lx\n",cs->divert_id); del_timer(&cs->timer); cs->ics.driver = -1; break; case ISDN_STAT_CAUSE: sprintf(cs->info,"130 0x%lx %s\n",cs->divert_id,ic->parm.num); break; case ISDN_STAT_REDIR: sprintf(cs->info,"131 0x%lx\n",cs->divert_id); del_timer(&cs->timer); cs->ics.driver = -1; break; default: sprintf(cs->info,"999 0x%lx 0x%x\n",cs->divert_id,(int)(ic->command)); break; } put_info_buffer(cs->info); retval = 0; } cs1 = cs; cs = cs->next; if (cs1->ics.driver == -1) { save_flags(flags); cli(); if (cs1->prev) cs1->prev->next = cs1->next; /* forward link */ else divert_head = cs1->next; if (cs1->next) cs1->next->prev = cs1->prev; /* back link */ restore_flags(flags); kfree(cs1); } } return(retval); /* not found */ } /* isdn_divert_stat_callback */ /********************/ /* callback from ll */ /********************/ int ll_callback(isdn_ctrl *ic) { switch (ic->command) { case ISDN_STAT_ICALL: case ISDN_STAT_ICALLW: return(isdn_divert_icall(ic)); break; case ISDN_STAT_PROT: if ((ic->arg & 0xFF) == ISDN_PTYPE_EURO) { if (ic->arg != DSS1_STAT_INVOKE_BRD) return(prot_stat_callback(ic)); else return(0); /* DSS1 invoke broadcast */ } else return(-1); /* protocol not euro */ default: return(isdn_divert_stat_callback(ic)); } } /* ll_callback */
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