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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/isdn/hisax/l3ni1.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/isdn/hisax/l3ni1.c')
-rw-r--r-- | drivers/isdn/hisax/l3ni1.c | 3189 |
1 files changed, 3189 insertions, 0 deletions
diff --git a/drivers/isdn/hisax/l3ni1.c b/drivers/isdn/hisax/l3ni1.c new file mode 100644 index 000000000000..3ab3a54daac1 --- /dev/null +++ b/drivers/isdn/hisax/l3ni1.c @@ -0,0 +1,3189 @@ +/* $Id: l3ni1.c,v 2.8.2.3 2004/01/13 14:31:25 keil Exp $ + * + * NI1 D-channel protocol + * + * Author Matt Henderson & Guy Ellis + * Copyright by Traverse Technologies Pty Ltd, www.travers.com.au + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * 2000.6.6 Initial implementation of routines for US NI1 + * Layer 3 protocol based on the EURO/DSS1 D-channel protocol + * driver written by Karsten Keil et al. + * NI-1 Hall of Fame - Thanks to.... + * Ragnar Paulson - for some handy code fragments + * Will Scales - beta tester extraordinaire + * Brett Whittacre - beta tester and remote devel system in Vegas + * + */ + +#include "hisax.h" +#include "isdnl3.h" +#include "l3ni1.h" +#include <linux/ctype.h> + +extern char *HiSax_getrev(const char *revision); +const char *ni1_revision = "$Revision: 2.8.2.3 $"; + +#define EXT_BEARER_CAPS 1 + +#define MsgHead(ptr, cref, mty) \ + *ptr++ = 0x8; \ + if (cref == -1) { \ + *ptr++ = 0x0; \ + } else { \ + *ptr++ = 0x1; \ + *ptr++ = cref^0x80; \ + } \ + *ptr++ = mty + + +/**********************************************/ +/* get a new invoke id for remote operations. */ +/* Only a return value != 0 is valid */ +/**********************************************/ +static unsigned char new_invoke_id(struct PStack *p) +{ + unsigned char retval; + int i; + + i = 32; /* maximum search depth */ + + retval = p->prot.ni1.last_invoke_id + 1; /* try new id */ + while ((i) && (p->prot.ni1.invoke_used[retval >> 3] == 0xFF)) { + p->prot.ni1.last_invoke_id = (retval & 0xF8) + 8; + i--; + } + if (i) { + while (p->prot.ni1.invoke_used[retval >> 3] & (1 << (retval & 7))) + retval++; + } else + retval = 0; + p->prot.ni1.last_invoke_id = retval; + p->prot.ni1.invoke_used[retval >> 3] |= (1 << (retval & 7)); + return(retval); +} /* new_invoke_id */ + +/*************************/ +/* free a used invoke id */ +/*************************/ +static void free_invoke_id(struct PStack *p, unsigned char id) +{ + + if (!id) return; /* 0 = invalid value */ + + p->prot.ni1.invoke_used[id >> 3] &= ~(1 << (id & 7)); +} /* free_invoke_id */ + + +/**********************************************************/ +/* create a new l3 process and fill in ni1 specific data */ +/**********************************************************/ +static struct l3_process +*ni1_new_l3_process(struct PStack *st, int cr) +{ struct l3_process *proc; + + if (!(proc = new_l3_process(st, cr))) + return(NULL); + + proc->prot.ni1.invoke_id = 0; + proc->prot.ni1.remote_operation = 0; + proc->prot.ni1.uus1_data[0] = '\0'; + + return(proc); +} /* ni1_new_l3_process */ + +/************************************************/ +/* free a l3 process and all ni1 specific data */ +/************************************************/ +static void +ni1_release_l3_process(struct l3_process *p) +{ + free_invoke_id(p->st,p->prot.ni1.invoke_id); + release_l3_process(p); +} /* ni1_release_l3_process */ + +/********************************************************/ +/* search a process with invoke id id and dummy callref */ +/********************************************************/ +static struct l3_process * +l3ni1_search_dummy_proc(struct PStack *st, int id) +{ struct l3_process *pc = st->l3.proc; /* start of processes */ + + if (!id) return(NULL); + + while (pc) + { if ((pc->callref == -1) && (pc->prot.ni1.invoke_id == id)) + return(pc); + pc = pc->next; + } + return(NULL); +} /* l3ni1_search_dummy_proc */ + +/*******************************************************************/ +/* called when a facility message with a dummy callref is received */ +/* and a return result is delivered. id specifies the invoke id. */ +/*******************************************************************/ +static void +l3ni1_dummy_return_result(struct PStack *st, int id, u_char *p, u_char nlen) +{ isdn_ctrl ic; + struct IsdnCardState *cs; + struct l3_process *pc = NULL; + + if ((pc = l3ni1_search_dummy_proc(st, id))) + { L3DelTimer(&pc->timer); /* remove timer */ + + cs = pc->st->l1.hardware; + ic.driver = cs->myid; + ic.command = ISDN_STAT_PROT; + ic.arg = NI1_STAT_INVOKE_RES; + ic.parm.ni1_io.hl_id = pc->prot.ni1.invoke_id; + ic.parm.ni1_io.ll_id = pc->prot.ni1.ll_id; + ic.parm.ni1_io.proc = pc->prot.ni1.proc; + ic.parm.ni1_io.timeout= 0; + ic.parm.ni1_io.datalen = nlen; + ic.parm.ni1_io.data = p; + free_invoke_id(pc->st, pc->prot.ni1.invoke_id); + pc->prot.ni1.invoke_id = 0; /* reset id */ + + cs->iif.statcallb(&ic); + ni1_release_l3_process(pc); + } + else + l3_debug(st, "dummy return result id=0x%x result len=%d",id,nlen); +} /* l3ni1_dummy_return_result */ + +/*******************************************************************/ +/* called when a facility message with a dummy callref is received */ +/* and a return error is delivered. id specifies the invoke id. */ +/*******************************************************************/ +static void +l3ni1_dummy_error_return(struct PStack *st, int id, ulong error) +{ isdn_ctrl ic; + struct IsdnCardState *cs; + struct l3_process *pc = NULL; + + if ((pc = l3ni1_search_dummy_proc(st, id))) + { L3DelTimer(&pc->timer); /* remove timer */ + + cs = pc->st->l1.hardware; + ic.driver = cs->myid; + ic.command = ISDN_STAT_PROT; + ic.arg = NI1_STAT_INVOKE_ERR; + ic.parm.ni1_io.hl_id = pc->prot.ni1.invoke_id; + ic.parm.ni1_io.ll_id = pc->prot.ni1.ll_id; + ic.parm.ni1_io.proc = pc->prot.ni1.proc; + ic.parm.ni1_io.timeout= error; + ic.parm.ni1_io.datalen = 0; + ic.parm.ni1_io.data = NULL; + free_invoke_id(pc->st, pc->prot.ni1.invoke_id); + pc->prot.ni1.invoke_id = 0; /* reset id */ + + cs->iif.statcallb(&ic); + ni1_release_l3_process(pc); + } + else + l3_debug(st, "dummy return error id=0x%x error=0x%lx",id,error); +} /* l3ni1_error_return */ + +/*******************************************************************/ +/* called when a facility message with a dummy callref is received */ +/* and a invoke is delivered. id specifies the invoke id. */ +/*******************************************************************/ +static void +l3ni1_dummy_invoke(struct PStack *st, int cr, int id, + int ident, u_char *p, u_char nlen) +{ isdn_ctrl ic; + struct IsdnCardState *cs; + + l3_debug(st, "dummy invoke %s id=0x%x ident=0x%x datalen=%d", + (cr == -1) ? "local" : "broadcast",id,ident,nlen); + if (cr >= -1) return; /* ignore local data */ + + cs = st->l1.hardware; + ic.driver = cs->myid; + ic.command = ISDN_STAT_PROT; + ic.arg = NI1_STAT_INVOKE_BRD; + ic.parm.ni1_io.hl_id = id; + ic.parm.ni1_io.ll_id = 0; + ic.parm.ni1_io.proc = ident; + ic.parm.ni1_io.timeout= 0; + ic.parm.ni1_io.datalen = nlen; + ic.parm.ni1_io.data = p; + + cs->iif.statcallb(&ic); +} /* l3ni1_dummy_invoke */ + +static void +l3ni1_parse_facility(struct PStack *st, struct l3_process *pc, + int cr, u_char * p) +{ + int qd_len = 0; + unsigned char nlen = 0, ilen, cp_tag; + int ident, id; + ulong err_ret; + + if (pc) + st = pc->st; /* valid Stack */ + else + if ((!st) || (cr >= 0)) return; /* neither pc nor st specified */ + + p++; + qd_len = *p++; + if (qd_len == 0) { + l3_debug(st, "qd_len == 0"); + return; + } + if ((*p & 0x1F) != 0x11) { /* Service discriminator, supplementary service */ + l3_debug(st, "supplementary service != 0x11"); + return; + } + while (qd_len > 0 && !(*p & 0x80)) { /* extension ? */ + p++; + qd_len--; + } + if (qd_len < 2) { + l3_debug(st, "qd_len < 2"); + return; + } + p++; + qd_len--; + if ((*p & 0xE0) != 0xA0) { /* class and form */ + l3_debug(st, "class and form != 0xA0"); + return; + } + + cp_tag = *p & 0x1F; /* remember tag value */ + + p++; + qd_len--; + if (qd_len < 1) + { l3_debug(st, "qd_len < 1"); + return; + } + if (*p & 0x80) + { /* length format indefinite or limited */ + nlen = *p++ & 0x7F; /* number of len bytes or indefinite */ + if ((qd_len-- < ((!nlen) ? 3 : (1 + nlen))) || + (nlen > 1)) + { l3_debug(st, "length format error or not implemented"); + return; + } + if (nlen == 1) + { nlen = *p++; /* complete length */ + qd_len--; + } + else + { qd_len -= 2; /* trailing null bytes */ + if ((*(p+qd_len)) || (*(p+qd_len+1))) + { l3_debug(st,"length format indefinite error"); + return; + } + nlen = qd_len; + } + } + else + { nlen = *p++; + qd_len--; + } + if (qd_len < nlen) + { l3_debug(st, "qd_len < nlen"); + return; + } + qd_len -= nlen; + + if (nlen < 2) + { l3_debug(st, "nlen < 2"); + return; + } + if (*p != 0x02) + { /* invoke identifier tag */ + l3_debug(st, "invoke identifier tag !=0x02"); + return; + } + p++; + nlen--; + if (*p & 0x80) + { /* length format */ + l3_debug(st, "invoke id length format 2"); + return; + } + ilen = *p++; + nlen--; + if (ilen > nlen || ilen == 0) + { l3_debug(st, "ilen > nlen || ilen == 0"); + return; + } + nlen -= ilen; + id = 0; + while (ilen > 0) + { id = (id << 8) | (*p++ & 0xFF); /* invoke identifier */ + ilen--; + } + + switch (cp_tag) { /* component tag */ + case 1: /* invoke */ + if (nlen < 2) { + l3_debug(st, "nlen < 2 22"); + return; + } + if (*p != 0x02) { /* operation value */ + l3_debug(st, "operation value !=0x02"); + return; + } + p++; + nlen--; + ilen = *p++; + nlen--; + if (ilen > nlen || ilen == 0) { + l3_debug(st, "ilen > nlen || ilen == 0 22"); + return; + } + nlen -= ilen; + ident = 0; + while (ilen > 0) { + ident = (ident << 8) | (*p++ & 0xFF); + ilen--; + } + + if (!pc) + { + l3ni1_dummy_invoke(st, cr, id, ident, p, nlen); + return; + } + l3_debug(st, "invoke break"); + break; + case 2: /* return result */ + /* if no process available handle separately */ + if (!pc) + { if (cr == -1) + l3ni1_dummy_return_result(st, id, p, nlen); + return; + } + if ((pc->prot.ni1.invoke_id) && (pc->prot.ni1.invoke_id == id)) + { /* Diversion successful */ + free_invoke_id(st,pc->prot.ni1.invoke_id); + pc->prot.ni1.remote_result = 0; /* success */ + pc->prot.ni1.invoke_id = 0; + pc->redir_result = pc->prot.ni1.remote_result; + st->l3.l3l4(st, CC_REDIR | INDICATION, pc); } /* Diversion successful */ + else + l3_debug(st,"return error unknown identifier"); + break; + case 3: /* return error */ + err_ret = 0; + if (nlen < 2) + { l3_debug(st, "return error nlen < 2"); + return; + } + if (*p != 0x02) + { /* result tag */ + l3_debug(st, "invoke error tag !=0x02"); + return; + } + p++; + nlen--; + if (*p > 4) + { /* length format */ + l3_debug(st, "invoke return errlen > 4 "); + return; + } + ilen = *p++; + nlen--; + if (ilen > nlen || ilen == 0) + { l3_debug(st, "error return ilen > nlen || ilen == 0"); + return; + } + nlen -= ilen; + while (ilen > 0) + { err_ret = (err_ret << 8) | (*p++ & 0xFF); /* error value */ + ilen--; + } + /* if no process available handle separately */ + if (!pc) + { if (cr == -1) + l3ni1_dummy_error_return(st, id, err_ret); + return; + } + if ((pc->prot.ni1.invoke_id) && (pc->prot.ni1.invoke_id == id)) + { /* Deflection error */ + free_invoke_id(st,pc->prot.ni1.invoke_id); + pc->prot.ni1.remote_result = err_ret; /* result */ + pc->prot.ni1.invoke_id = 0; + pc->redir_result = pc->prot.ni1.remote_result; + st->l3.l3l4(st, CC_REDIR | INDICATION, pc); + } /* Deflection error */ + else + l3_debug(st,"return result unknown identifier"); + break; + default: + l3_debug(st, "facility default break tag=0x%02x",cp_tag); + break; + } +} + +static void +l3ni1_message(struct l3_process *pc, u_char mt) +{ + struct sk_buff *skb; + u_char *p; + + if (!(skb = l3_alloc_skb(4))) + return; + p = skb_put(skb, 4); + MsgHead(p, pc->callref, mt); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} + +static void +l3ni1_message_plus_chid(struct l3_process *pc, u_char mt) +/* sends an l3 messages plus channel id - added GE 05/09/00 */ +{ + struct sk_buff *skb; + u_char tmp[16]; + u_char *p = tmp; + u_char chid; + + chid = (u_char)(pc->para.bchannel & 0x03) | 0x88; + MsgHead(p, pc->callref, mt); + *p++ = IE_CHANNEL_ID; + *p++ = 0x01; + *p++ = chid; + + if (!(skb = l3_alloc_skb(7))) + return; + memcpy(skb_put(skb, 7), tmp, 7); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} + +static void +l3ni1_message_cause(struct l3_process *pc, u_char mt, u_char cause) +{ + struct sk_buff *skb; + u_char tmp[16]; + u_char *p = tmp; + int l; + + MsgHead(p, pc->callref, mt); + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = cause | 0x80; + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} + +static void +l3ni1_status_send(struct l3_process *pc, u_char pr, void *arg) +{ + u_char tmp[16]; + u_char *p = tmp; + int l; + struct sk_buff *skb; + + MsgHead(p, pc->callref, MT_STATUS); + + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = pc->para.cause | 0x80; + + *p++ = IE_CALL_STATE; + *p++ = 0x1; + *p++ = pc->state & 0x3f; + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} + +static void +l3ni1_msg_without_setup(struct l3_process *pc, u_char pr, void *arg) +{ + /* This routine is called if here was no SETUP made (checks in ni1up and in + * l3ni1_setup) and a RELEASE_COMPLETE have to be sent with an error code + * MT_STATUS_ENQUIRE in the NULL state is handled too + */ + u_char tmp[16]; + u_char *p = tmp; + int l; + struct sk_buff *skb; + + switch (pc->para.cause) { + case 81: /* invalid callreference */ + case 88: /* incomp destination */ + case 96: /* mandory IE missing */ + case 100: /* invalid IE contents */ + case 101: /* incompatible Callstate */ + MsgHead(p, pc->callref, MT_RELEASE_COMPLETE); + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = pc->para.cause | 0x80; + break; + default: + printk(KERN_ERR "HiSax l3ni1_msg_without_setup wrong cause %d\n", + pc->para.cause); + return; + } + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); + ni1_release_l3_process(pc); +} + +static int ie_ALERTING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1, + IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_HLC, + IE_USER_USER, -1}; +static int ie_CALL_PROCEEDING[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1, + IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_HLC, -1}; +static int ie_CONNECT[] = {IE_BEARER, IE_CHANNEL_ID | IE_MANDATORY_1, + IE_FACILITY, IE_PROGRESS, IE_DISPLAY, IE_DATE, IE_SIGNAL, + IE_CONNECT_PN, IE_CONNECT_SUB, IE_LLC, IE_HLC, IE_USER_USER, -1}; +static int ie_CONNECT_ACKNOWLEDGE[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_SIGNAL, -1}; +static int ie_DISCONNECT[] = {IE_CAUSE | IE_MANDATORY, IE_FACILITY, + IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1}; +static int ie_INFORMATION[] = {IE_COMPLETE, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL, + IE_CALLED_PN, -1}; +static int ie_NOTIFY[] = {IE_BEARER, IE_NOTIFY | IE_MANDATORY, IE_DISPLAY, -1}; +static int ie_PROGRESS[] = {IE_BEARER, IE_CAUSE, IE_FACILITY, IE_PROGRESS | + IE_MANDATORY, IE_DISPLAY, IE_HLC, IE_USER_USER, -1}; +static int ie_RELEASE[] = {IE_CAUSE | IE_MANDATORY_1, IE_FACILITY, IE_DISPLAY, + IE_SIGNAL, IE_USER_USER, -1}; +/* a RELEASE_COMPLETE with errors don't require special actions +static int ie_RELEASE_COMPLETE[] = {IE_CAUSE | IE_MANDATORY_1, IE_DISPLAY, IE_SIGNAL, IE_USER_USER, -1}; +*/ +static int ie_RESUME_ACKNOWLEDGE[] = {IE_CHANNEL_ID| IE_MANDATORY, IE_FACILITY, + IE_DISPLAY, -1}; +static int ie_RESUME_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1}; +static int ie_SETUP[] = {IE_COMPLETE, IE_BEARER | IE_MANDATORY, + IE_CHANNEL_ID| IE_MANDATORY, IE_FACILITY, IE_PROGRESS, + IE_NET_FAC, IE_DISPLAY, IE_KEYPAD, IE_SIGNAL, IE_CALLING_PN, + IE_CALLING_SUB, IE_CALLED_PN, IE_CALLED_SUB, IE_REDIR_NR, + IE_LLC, IE_HLC, IE_USER_USER, -1}; +static int ie_SETUP_ACKNOWLEDGE[] = {IE_CHANNEL_ID | IE_MANDATORY, IE_FACILITY, + IE_PROGRESS, IE_DISPLAY, IE_SIGNAL, -1}; +static int ie_STATUS[] = {IE_CAUSE | IE_MANDATORY, IE_CALL_STATE | + IE_MANDATORY, IE_DISPLAY, -1}; +static int ie_STATUS_ENQUIRY[] = {IE_DISPLAY, -1}; +static int ie_SUSPEND_ACKNOWLEDGE[] = {IE_DISPLAY, IE_FACILITY, -1}; +static int ie_SUSPEND_REJECT[] = {IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1}; +/* not used + * static int ie_CONGESTION_CONTROL[] = {IE_CONGESTION | IE_MANDATORY, + * IE_CAUSE | IE_MANDATORY, IE_DISPLAY, -1}; + * static int ie_USER_INFORMATION[] = {IE_MORE_DATA, IE_USER_USER | IE_MANDATORY, -1}; + * static int ie_RESTART[] = {IE_CHANNEL_ID, IE_DISPLAY, IE_RESTART_IND | + * IE_MANDATORY, -1}; + */ +static int ie_FACILITY[] = {IE_FACILITY | IE_MANDATORY, IE_DISPLAY, -1}; +static int comp_required[] = {1,2,3,5,6,7,9,10,11,14,15,-1}; +static int l3_valid_states[] = {0,1,2,3,4,6,7,8,9,10,11,12,15,17,19,25,-1}; + +struct ie_len { + int ie; + int len; +}; + +static +struct ie_len max_ie_len[] = { + {IE_SEGMENT, 4}, + {IE_BEARER, 12}, + {IE_CAUSE, 32}, + {IE_CALL_ID, 10}, + {IE_CALL_STATE, 3}, + {IE_CHANNEL_ID, 34}, + {IE_FACILITY, 255}, + {IE_PROGRESS, 4}, + {IE_NET_FAC, 255}, + {IE_NOTIFY, 3}, + {IE_DISPLAY, 82}, + {IE_DATE, 8}, + {IE_KEYPAD, 34}, + {IE_SIGNAL, 3}, + {IE_INFORATE, 6}, + {IE_E2E_TDELAY, 11}, + {IE_TDELAY_SEL, 5}, + {IE_PACK_BINPARA, 3}, + {IE_PACK_WINSIZE, 4}, + {IE_PACK_SIZE, 4}, + {IE_CUG, 7}, + {IE_REV_CHARGE, 3}, + {IE_CALLING_PN, 24}, + {IE_CALLING_SUB, 23}, + {IE_CALLED_PN, 24}, + {IE_CALLED_SUB, 23}, + {IE_REDIR_NR, 255}, + {IE_TRANS_SEL, 255}, + {IE_RESTART_IND, 3}, + {IE_LLC, 18}, + {IE_HLC, 5}, + {IE_USER_USER, 131}, + {-1,0}, +}; + +static int +getmax_ie_len(u_char ie) { + int i = 0; + while (max_ie_len[i].ie != -1) { + if (max_ie_len[i].ie == ie) + return(max_ie_len[i].len); + i++; + } + return(255); +} + +static int +ie_in_set(struct l3_process *pc, u_char ie, int *checklist) { + int ret = 1; + + while (*checklist != -1) { + if ((*checklist & 0xff) == ie) { + if (ie & 0x80) + return(-ret); + else + return(ret); + } + ret++; + checklist++; + } + return(0); +} + +static int +check_infoelements(struct l3_process *pc, struct sk_buff *skb, int *checklist) +{ + int *cl = checklist; + u_char mt; + u_char *p, ie; + int l, newpos, oldpos; + int err_seq = 0, err_len = 0, err_compr = 0, err_ureg = 0; + u_char codeset = 0; + u_char old_codeset = 0; + u_char codelock = 1; + + p = skb->data; + /* skip cr */ + p++; + l = (*p++) & 0xf; + p += l; + mt = *p++; + oldpos = 0; + while ((p - skb->data) < skb->len) { + if ((*p & 0xf0) == 0x90) { /* shift codeset */ + old_codeset = codeset; + codeset = *p & 7; + if (*p & 0x08) + codelock = 0; + else + codelock = 1; + if (pc->debug & L3_DEB_CHECK) + l3_debug(pc->st, "check IE shift%scodeset %d->%d", + codelock ? " locking ": " ", old_codeset, codeset); + p++; + continue; + } + if (!codeset) { /* only codeset 0 */ + if ((newpos = ie_in_set(pc, *p, cl))) { + if (newpos > 0) { + if (newpos < oldpos) + err_seq++; + else + oldpos = newpos; + } + } else { + if (ie_in_set(pc, *p, comp_required)) + err_compr++; + else + err_ureg++; + } + } + ie = *p++; + if (ie & 0x80) { + l = 1; + } else { + l = *p++; + p += l; + l += 2; + } + if (!codeset && (l > getmax_ie_len(ie))) + err_len++; + if (!codelock) { + if (pc->debug & L3_DEB_CHECK) + l3_debug(pc->st, "check IE shift back codeset %d->%d", + codeset, old_codeset); + codeset = old_codeset; + codelock = 1; + } + } + if (err_compr | err_ureg | err_len | err_seq) { + if (pc->debug & L3_DEB_CHECK) + l3_debug(pc->st, "check IE MT(%x) %d/%d/%d/%d", + mt, err_compr, err_ureg, err_len, err_seq); + if (err_compr) + return(ERR_IE_COMPREHENSION); + if (err_ureg) + return(ERR_IE_UNRECOGNIZED); + if (err_len) + return(ERR_IE_LENGTH); + if (err_seq) + return(ERR_IE_SEQUENCE); + } + return(0); +} + +/* verify if a message type exists and contain no IE error */ +static int +l3ni1_check_messagetype_validity(struct l3_process *pc, int mt, void *arg) +{ + switch (mt) { + case MT_ALERTING: + case MT_CALL_PROCEEDING: + case MT_CONNECT: + case MT_CONNECT_ACKNOWLEDGE: + case MT_DISCONNECT: + case MT_INFORMATION: + case MT_FACILITY: + case MT_NOTIFY: + case MT_PROGRESS: + case MT_RELEASE: + case MT_RELEASE_COMPLETE: + case MT_SETUP: + case MT_SETUP_ACKNOWLEDGE: + case MT_RESUME_ACKNOWLEDGE: + case MT_RESUME_REJECT: + case MT_SUSPEND_ACKNOWLEDGE: + case MT_SUSPEND_REJECT: + case MT_USER_INFORMATION: + case MT_RESTART: + case MT_RESTART_ACKNOWLEDGE: + case MT_CONGESTION_CONTROL: + case MT_STATUS: + case MT_STATUS_ENQUIRY: + if (pc->debug & L3_DEB_CHECK) + l3_debug(pc->st, "l3ni1_check_messagetype_validity mt(%x) OK", mt); + break; + case MT_RESUME: /* RESUME only in user->net */ + case MT_SUSPEND: /* SUSPEND only in user->net */ + default: + if (pc->debug & (L3_DEB_CHECK | L3_DEB_WARN)) + l3_debug(pc->st, "l3ni1_check_messagetype_validity mt(%x) fail", mt); + pc->para.cause = 97; + l3ni1_status_send(pc, 0, NULL); + return(1); + } + return(0); +} + +static void +l3ni1_std_ie_err(struct l3_process *pc, int ret) { + + if (pc->debug & L3_DEB_CHECK) + l3_debug(pc->st, "check_infoelements ret %d", ret); + switch(ret) { + case 0: + break; + case ERR_IE_COMPREHENSION: + pc->para.cause = 96; + l3ni1_status_send(pc, 0, NULL); + break; + case ERR_IE_UNRECOGNIZED: + pc->para.cause = 99; + l3ni1_status_send(pc, 0, NULL); + break; + case ERR_IE_LENGTH: + pc->para.cause = 100; + l3ni1_status_send(pc, 0, NULL); + break; + case ERR_IE_SEQUENCE: + default: + break; + } +} + +static int +l3ni1_get_channel_id(struct l3_process *pc, struct sk_buff *skb) { + u_char *p; + + p = skb->data; + if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) { + p++; + if (*p != 1) { /* len for BRI = 1 */ + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "wrong chid len %d", *p); + return (-2); + } + p++; + if (*p & 0x60) { /* only base rate interface */ + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "wrong chid %x", *p); + return (-3); + } + return(*p & 0x3); + } else + return(-1); +} + +static int +l3ni1_get_cause(struct l3_process *pc, struct sk_buff *skb) { + u_char l, i=0; + u_char *p; + + p = skb->data; + pc->para.cause = 31; + pc->para.loc = 0; + if ((p = findie(p, skb->len, IE_CAUSE, 0))) { + p++; + l = *p++; + if (l>30) + return(1); + if (l) { + pc->para.loc = *p++; + l--; + } else { + return(2); + } + if (l && !(pc->para.loc & 0x80)) { + l--; + p++; /* skip recommendation */ + } + if (l) { + pc->para.cause = *p++; + l--; + if (!(pc->para.cause & 0x80)) + return(3); + } else + return(4); + while (l && (i<6)) { + pc->para.diag[i++] = *p++; + l--; + } + } else + return(-1); + return(0); +} + +static void +l3ni1_msg_with_uus(struct l3_process *pc, u_char cmd) +{ + struct sk_buff *skb; + u_char tmp[16+40]; + u_char *p = tmp; + int l; + + MsgHead(p, pc->callref, cmd); + + if (pc->prot.ni1.uus1_data[0]) + { *p++ = IE_USER_USER; /* UUS info element */ + *p++ = strlen(pc->prot.ni1.uus1_data) + 1; + *p++ = 0x04; /* IA5 chars */ + strcpy(p,pc->prot.ni1.uus1_data); + p += strlen(pc->prot.ni1.uus1_data); + pc->prot.ni1.uus1_data[0] = '\0'; + } + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} /* l3ni1_msg_with_uus */ + +static void +l3ni1_release_req(struct l3_process *pc, u_char pr, void *arg) +{ + StopAllL3Timer(pc); + newl3state(pc, 19); + if (!pc->prot.ni1.uus1_data[0]) + l3ni1_message(pc, MT_RELEASE); + else + l3ni1_msg_with_uus(pc, MT_RELEASE); + L3AddTimer(&pc->timer, T308, CC_T308_1); +} + +static void +l3ni1_release_cmpl(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + if ((ret = l3ni1_get_cause(pc, skb))>0) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "RELCMPL get_cause ret(%d)",ret); + } else if (ret < 0) + pc->para.cause = NO_CAUSE; + StopAllL3Timer(pc); + newl3state(pc, 0); + pc->st->l3.l3l4(pc->st, CC_RELEASE | CONFIRM, pc); + ni1_release_l3_process(pc); +} + +#if EXT_BEARER_CAPS + +static u_char * +EncodeASyncParams(u_char * p, u_char si2) +{ // 7c 06 88 90 21 42 00 bb + + p[0] = 0; + p[1] = 0x40; // Intermediate rate: 16 kbit/s jj 2000.02.19 + p[2] = 0x80; + if (si2 & 32) // 7 data bits + + p[2] += 16; + else // 8 data bits + + p[2] += 24; + + if (si2 & 16) // 2 stop bits + + p[2] += 96; + else // 1 stop bit + + p[2] += 32; + + if (si2 & 8) // even parity + + p[2] += 2; + else // no parity + + p[2] += 3; + + switch (si2 & 0x07) { + case 0: + p[0] = 66; // 1200 bit/s + + break; + case 1: + p[0] = 88; // 1200/75 bit/s + + break; + case 2: + p[0] = 87; // 75/1200 bit/s + + break; + case 3: + p[0] = 67; // 2400 bit/s + + break; + case 4: + p[0] = 69; // 4800 bit/s + + break; + case 5: + p[0] = 72; // 9600 bit/s + + break; + case 6: + p[0] = 73; // 14400 bit/s + + break; + case 7: + p[0] = 75; // 19200 bit/s + + break; + } + return p + 3; +} + +static u_char +EncodeSyncParams(u_char si2, u_char ai) +{ + + switch (si2) { + case 0: + return ai + 2; // 1200 bit/s + + case 1: + return ai + 24; // 1200/75 bit/s + + case 2: + return ai + 23; // 75/1200 bit/s + + case 3: + return ai + 3; // 2400 bit/s + + case 4: + return ai + 5; // 4800 bit/s + + case 5: + return ai + 8; // 9600 bit/s + + case 6: + return ai + 9; // 14400 bit/s + + case 7: + return ai + 11; // 19200 bit/s + + case 8: + return ai + 14; // 48000 bit/s + + case 9: + return ai + 15; // 56000 bit/s + + case 15: + return ai + 40; // negotiate bit/s + + default: + break; + } + return ai; +} + + +static u_char +DecodeASyncParams(u_char si2, u_char * p) +{ + u_char info; + + switch (p[5]) { + case 66: // 1200 bit/s + + break; // si2 don't change + + case 88: // 1200/75 bit/s + + si2 += 1; + break; + case 87: // 75/1200 bit/s + + si2 += 2; + break; + case 67: // 2400 bit/s + + si2 += 3; + break; + case 69: // 4800 bit/s + + si2 += 4; + break; + case 72: // 9600 bit/s + + si2 += 5; + break; + case 73: // 14400 bit/s + + si2 += 6; + break; + case 75: // 19200 bit/s + + si2 += 7; + break; + } + + info = p[7] & 0x7f; + if ((info & 16) && (!(info & 8))) // 7 data bits + + si2 += 32; // else 8 data bits + + if ((info & 96) == 96) // 2 stop bits + + si2 += 16; // else 1 stop bit + + if ((info & 2) && (!(info & 1))) // even parity + + si2 += 8; // else no parity + + return si2; +} + + +static u_char +DecodeSyncParams(u_char si2, u_char info) +{ + info &= 0x7f; + switch (info) { + case 40: // bit/s negotiation failed ai := 165 not 175! + + return si2 + 15; + case 15: // 56000 bit/s failed, ai := 0 not 169 ! + + return si2 + 9; + case 14: // 48000 bit/s + + return si2 + 8; + case 11: // 19200 bit/s + + return si2 + 7; + case 9: // 14400 bit/s + + return si2 + 6; + case 8: // 9600 bit/s + + return si2 + 5; + case 5: // 4800 bit/s + + return si2 + 4; + case 3: // 2400 bit/s + + return si2 + 3; + case 23: // 75/1200 bit/s + + return si2 + 2; + case 24: // 1200/75 bit/s + + return si2 + 1; + default: // 1200 bit/s + + return si2; + } +} + +static u_char +DecodeSI2(struct sk_buff *skb) +{ + u_char *p; //, *pend=skb->data + skb->len; + + if ((p = findie(skb->data, skb->len, 0x7c, 0))) { + switch (p[4] & 0x0f) { + case 0x01: + if (p[1] == 0x04) // sync. Bitratenadaption + + return DecodeSyncParams(160, p[5]); // V.110/X.30 + + else if (p[1] == 0x06) // async. Bitratenadaption + + return DecodeASyncParams(192, p); // V.110/X.30 + + break; + case 0x08: // if (p[5] == 0x02) // sync. Bitratenadaption + if (p[1] > 3) + return DecodeSyncParams(176, p[5]); // V.120 + break; + } + } + return 0; +} + +#endif + + +static void +l3ni1_setup_req(struct l3_process *pc, u_char pr, + void *arg) +{ + struct sk_buff *skb; + u_char tmp[128]; + u_char *p = tmp; + + u_char *teln; + u_char *sub; + u_char *sp; + int l; + + MsgHead(p, pc->callref, MT_SETUP); + + teln = pc->para.setup.phone; + + *p++ = 0xa1; /* complete indicator */ + /* + * Set Bearer Capability, Map info from 1TR6-convention to NI1 + */ + switch (pc->para.setup.si1) { + case 1: /* Telephony */ + *p++ = IE_BEARER; + *p++ = 0x3; /* Length */ + *p++ = 0x90; /* 3.1khz Audio */ + *p++ = 0x90; /* Circuit-Mode 64kbps */ + *p++ = 0xa2; /* u-Law Audio */ + break; + case 5: /* Datatransmission 64k, BTX */ + case 7: /* Datatransmission 64k */ + default: + *p++ = IE_BEARER; + *p++ = 0x2; /* Length */ + *p++ = 0x88; /* Coding Std. CCITT, unrestr. dig. Inform. */ + *p++ = 0x90; /* Circuit-Mode 64kbps */ + break; + } + + sub = NULL; + sp = teln; + while (*sp) { + if ('.' == *sp) { + sub = sp; + *sp = 0; + } else + sp++; + } + + *p++ = IE_KEYPAD; + *p++ = strlen(teln); + while (*teln) + *p++ = (*teln++) & 0x7F; + + if (sub) + *sub++ = '.'; + +#if EXT_BEARER_CAPS + if ((pc->para.setup.si2 >= 160) && (pc->para.setup.si2 <= 175)) { // sync. Bitratenadaption, V.110/X.30 + + *p++ = IE_LLC; + *p++ = 0x04; + *p++ = 0x88; + *p++ = 0x90; + *p++ = 0x21; + *p++ = EncodeSyncParams(pc->para.setup.si2 - 160, 0x80); + } else if ((pc->para.setup.si2 >= 176) && (pc->para.setup.si2 <= 191)) { // sync. Bitratenadaption, V.120 + + *p++ = IE_LLC; + *p++ = 0x05; + *p++ = 0x88; + *p++ = 0x90; + *p++ = 0x28; + *p++ = EncodeSyncParams(pc->para.setup.si2 - 176, 0); + *p++ = 0x82; + } else if (pc->para.setup.si2 >= 192) { // async. Bitratenadaption, V.110/X.30 + + *p++ = IE_LLC; + *p++ = 0x06; + *p++ = 0x88; + *p++ = 0x90; + *p++ = 0x21; + p = EncodeASyncParams(p, pc->para.setup.si2 - 192); + } else { + switch (pc->para.setup.si1) { + case 1: /* Telephony */ + *p++ = IE_LLC; + *p++ = 0x3; /* Length */ + *p++ = 0x90; /* Coding Std. CCITT, 3.1 kHz audio */ + *p++ = 0x90; /* Circuit-Mode 64kbps */ + *p++ = 0xa2; /* u-Law Audio */ + break; + case 5: /* Datatransmission 64k, BTX */ + case 7: /* Datatransmission 64k */ + default: + *p++ = IE_LLC; + *p++ = 0x2; /* Length */ + *p++ = 0x88; /* Coding Std. CCITT, unrestr. dig. Inform. */ + *p++ = 0x90; /* Circuit-Mode 64kbps */ + break; + } + } +#endif + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) +{ + return; +} + memcpy(skb_put(skb, l), tmp, l); + L3DelTimer(&pc->timer); + L3AddTimer(&pc->timer, T303, CC_T303); + newl3state(pc, 1); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} + +static void +l3ni1_call_proc(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int id, ret; + + if ((id = l3ni1_get_channel_id(pc, skb)) >= 0) { + if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup answer with wrong chid %x", id); + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + pc->para.bchannel = id; + } else if (1 == pc->state) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup answer wrong chid (ret %d)", id); + if (id == -1) + pc->para.cause = 96; + else + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + /* Now we are on none mandatory IEs */ + ret = check_infoelements(pc, skb, ie_CALL_PROCEEDING); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); + newl3state(pc, 3); + L3AddTimer(&pc->timer, T310, CC_T310); + if (ret) /* STATUS for none mandatory IE errors after actions are taken */ + l3ni1_std_ie_err(pc, ret); + pc->st->l3.l3l4(pc->st, CC_PROCEEDING | INDICATION, pc); +} + +static void +l3ni1_setup_ack(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int id, ret; + + if ((id = l3ni1_get_channel_id(pc, skb)) >= 0) { + if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup answer with wrong chid %x", id); + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + pc->para.bchannel = id; + } else { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup answer wrong chid (ret %d)", id); + if (id == -1) + pc->para.cause = 96; + else + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + /* Now we are on none mandatory IEs */ + ret = check_infoelements(pc, skb, ie_SETUP_ACKNOWLEDGE); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); + newl3state(pc, 2); + L3AddTimer(&pc->timer, T304, CC_T304); + if (ret) /* STATUS for none mandatory IE errors after actions are taken */ + l3ni1_std_ie_err(pc, ret); + pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc); +} + +static void +l3ni1_disconnect(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + u_char *p; + int ret; + u_char cause = 0; + + StopAllL3Timer(pc); + if ((ret = l3ni1_get_cause(pc, skb))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "DISC get_cause ret(%d)", ret); + if (ret < 0) + cause = 96; + else if (ret > 0) + cause = 100; + } + if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) + l3ni1_parse_facility(pc->st, pc, pc->callref, p); + ret = check_infoelements(pc, skb, ie_DISCONNECT); + if (ERR_IE_COMPREHENSION == ret) + cause = 96; + else if ((!cause) && (ERR_IE_UNRECOGNIZED == ret)) + cause = 99; + ret = pc->state; + newl3state(pc, 12); + if (cause) + newl3state(pc, 19); + if (11 != ret) + pc->st->l3.l3l4(pc->st, CC_DISCONNECT | INDICATION, pc); + else if (!cause) + l3ni1_release_req(pc, pr, NULL); + if (cause) { + l3ni1_message_cause(pc, MT_RELEASE, cause); + L3AddTimer(&pc->timer, T308, CC_T308_1); + } +} + +static void +l3ni1_connect(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + ret = check_infoelements(pc, skb, ie_CONNECT); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); /* T310 */ + newl3state(pc, 10); + pc->para.chargeinfo = 0; + /* here should inserted COLP handling KKe */ + if (ret) + l3ni1_std_ie_err(pc, ret); + pc->st->l3.l3l4(pc->st, CC_SETUP | CONFIRM, pc); +} + +static void +l3ni1_alerting(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + ret = check_infoelements(pc, skb, ie_ALERTING); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); /* T304 */ + newl3state(pc, 4); + if (ret) + l3ni1_std_ie_err(pc, ret); + pc->st->l3.l3l4(pc->st, CC_ALERTING | INDICATION, pc); +} + +static void +l3ni1_setup(struct l3_process *pc, u_char pr, void *arg) +{ + u_char *p; + int bcfound = 0; + char tmp[80]; + struct sk_buff *skb = arg; + int id; + int err = 0; + + /* + * Bearer Capabilities + */ + p = skb->data; + /* only the first occurence 'll be detected ! */ + if ((p = findie(p, skb->len, 0x04, 0))) { + if ((p[1] < 2) || (p[1] > 11)) + err = 1; + else { + pc->para.setup.si2 = 0; + switch (p[2] & 0x7f) { + case 0x00: /* Speech */ + case 0x10: /* 3.1 Khz audio */ + pc->para.setup.si1 = 1; + break; + case 0x08: /* Unrestricted digital information */ + pc->para.setup.si1 = 7; +/* JIM, 05.11.97 I wanna set service indicator 2 */ +#if EXT_BEARER_CAPS + pc->para.setup.si2 = DecodeSI2(skb); +#endif + break; + case 0x09: /* Restricted digital information */ + pc->para.setup.si1 = 2; + break; + case 0x11: + /* Unrestr. digital information with + * tones/announcements ( or 7 kHz audio + */ + pc->para.setup.si1 = 3; + break; + case 0x18: /* Video */ + pc->para.setup.si1 = 4; + break; + default: + err = 2; + break; + } + switch (p[3] & 0x7f) { + case 0x40: /* packed mode */ + pc->para.setup.si1 = 8; + break; + case 0x10: /* 64 kbit */ + case 0x11: /* 2*64 kbit */ + case 0x13: /* 384 kbit */ + case 0x15: /* 1536 kbit */ + case 0x17: /* 1920 kbit */ + pc->para.moderate = p[3] & 0x7f; + break; + default: + err = 3; + break; + } + } + if (pc->debug & L3_DEB_SI) + l3_debug(pc->st, "SI=%d, AI=%d", + pc->para.setup.si1, pc->para.setup.si2); + if (err) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup with wrong bearer(l=%d:%x,%x)", + p[1], p[2], p[3]); + pc->para.cause = 100; + l3ni1_msg_without_setup(pc, pr, NULL); + return; + } + } else { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup without bearer capabilities"); + /* ETS 300-104 1.3.3 */ + pc->para.cause = 96; + l3ni1_msg_without_setup(pc, pr, NULL); + return; + } + /* + * Channel Identification + */ + if ((id = l3ni1_get_channel_id(pc, skb)) >= 0) { + if ((pc->para.bchannel = id)) { + if ((3 == id) && (0x10 == pc->para.moderate)) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup with wrong chid %x", + id); + pc->para.cause = 100; + l3ni1_msg_without_setup(pc, pr, NULL); + return; + } + bcfound++; + } else + { if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup without bchannel, call waiting"); + bcfound++; + } + } else { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "setup with wrong chid ret %d", id); + if (id == -1) + pc->para.cause = 96; + else + pc->para.cause = 100; + l3ni1_msg_without_setup(pc, pr, NULL); + return; + } + /* Now we are on none mandatory IEs */ + err = check_infoelements(pc, skb, ie_SETUP); + if (ERR_IE_COMPREHENSION == err) { + pc->para.cause = 96; + l3ni1_msg_without_setup(pc, pr, NULL); + return; + } + p = skb->data; + if ((p = findie(p, skb->len, 0x70, 0))) + iecpy(pc->para.setup.eazmsn, p, 1); + else + pc->para.setup.eazmsn[0] = 0; + + p = skb->data; + if ((p = findie(p, skb->len, 0x71, 0))) { + /* Called party subaddress */ + if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) { + tmp[0] = '.'; + iecpy(&tmp[1], p, 2); + strcat(pc->para.setup.eazmsn, tmp); + } else if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "wrong called subaddress"); + } + p = skb->data; + if ((p = findie(p, skb->len, 0x6c, 0))) { + pc->para.setup.plan = p[2]; + if (p[2] & 0x80) { + iecpy(pc->para.setup.phone, p, 1); + pc->para.setup.screen = 0; + } else { + iecpy(pc->para.setup.phone, p, 2); + pc->para.setup.screen = p[3]; + } + } else { + pc->para.setup.phone[0] = 0; + pc->para.setup.plan = 0; + pc->para.setup.screen = 0; + } + p = skb->data; + if ((p = findie(p, skb->len, 0x6d, 0))) { + /* Calling party subaddress */ + if ((p[1] >= 2) && (p[2] == 0x80) && (p[3] == 0x50)) { + tmp[0] = '.'; + iecpy(&tmp[1], p, 2); + strcat(pc->para.setup.phone, tmp); + } else if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "wrong calling subaddress"); + } + newl3state(pc, 6); + if (err) /* STATUS for none mandatory IE errors after actions are taken */ + l3ni1_std_ie_err(pc, err); + pc->st->l3.l3l4(pc->st, CC_SETUP | INDICATION, pc); +} + +static void +l3ni1_reset(struct l3_process *pc, u_char pr, void *arg) +{ + ni1_release_l3_process(pc); +} + +static void +l3ni1_disconnect_req(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb; + u_char tmp[16+40]; + u_char *p = tmp; + int l; + u_char cause = 16; + + if (pc->para.cause != NO_CAUSE) + cause = pc->para.cause; + + StopAllL3Timer(pc); + + MsgHead(p, pc->callref, MT_DISCONNECT); + + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = cause | 0x80; + + if (pc->prot.ni1.uus1_data[0]) + { *p++ = IE_USER_USER; /* UUS info element */ + *p++ = strlen(pc->prot.ni1.uus1_data) + 1; + *p++ = 0x04; /* IA5 chars */ + strcpy(p,pc->prot.ni1.uus1_data); + p += strlen(pc->prot.ni1.uus1_data); + pc->prot.ni1.uus1_data[0] = '\0'; + } + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + newl3state(pc, 11); + l3_msg(pc->st, DL_DATA | REQUEST, skb); + L3AddTimer(&pc->timer, T305, CC_T305); +} + +static void +l3ni1_setup_rsp(struct l3_process *pc, u_char pr, + void *arg) +{ + if (!pc->para.bchannel) + { if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "D-chan connect for waiting call"); + l3ni1_disconnect_req(pc, pr, arg); + return; + } + newl3state(pc, 8); + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "D-chan connect for waiting call"); + l3ni1_message_plus_chid(pc, MT_CONNECT); /* GE 05/09/00 */ + L3DelTimer(&pc->timer); + L3AddTimer(&pc->timer, T313, CC_T313); +} + +static void +l3ni1_connect_ack(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + ret = check_infoelements(pc, skb, ie_CONNECT_ACKNOWLEDGE); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + newl3state(pc, 10); + L3DelTimer(&pc->timer); + if (ret) + l3ni1_std_ie_err(pc, ret); + pc->st->l3.l3l4(pc->st, CC_SETUP_COMPL | INDICATION, pc); +} + +static void +l3ni1_reject_req(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb; + u_char tmp[16]; + u_char *p = tmp; + int l; + u_char cause = 21; + + if (pc->para.cause != NO_CAUSE) + cause = pc->para.cause; + + MsgHead(p, pc->callref, MT_RELEASE_COMPLETE); + + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = cause | 0x80; + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); + pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc); + newl3state(pc, 0); + ni1_release_l3_process(pc); +} + +static void +l3ni1_release(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + u_char *p; + int ret, cause=0; + + StopAllL3Timer(pc); + if ((ret = l3ni1_get_cause(pc, skb))>0) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "REL get_cause ret(%d)", ret); + } else if (ret<0) + pc->para.cause = NO_CAUSE; + if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) { + l3ni1_parse_facility(pc->st, pc, pc->callref, p); + } + if ((ret<0) && (pc->state != 11)) + cause = 96; + else if (ret>0) + cause = 100; + ret = check_infoelements(pc, skb, ie_RELEASE); + if (ERR_IE_COMPREHENSION == ret) + cause = 96; + else if ((ERR_IE_UNRECOGNIZED == ret) && (!cause)) + cause = 99; + if (cause) + l3ni1_message_cause(pc, MT_RELEASE_COMPLETE, cause); + else + l3ni1_message(pc, MT_RELEASE_COMPLETE); + pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc); + newl3state(pc, 0); + ni1_release_l3_process(pc); +} + +static void +l3ni1_alert_req(struct l3_process *pc, u_char pr, + void *arg) +{ + newl3state(pc, 7); + if (!pc->prot.ni1.uus1_data[0]) + l3ni1_message(pc, MT_ALERTING); + else + l3ni1_msg_with_uus(pc, MT_ALERTING); +} + +static void +l3ni1_proceed_req(struct l3_process *pc, u_char pr, + void *arg) +{ + newl3state(pc, 9); + l3ni1_message(pc, MT_CALL_PROCEEDING); + pc->st->l3.l3l4(pc->st, CC_PROCEED_SEND | INDICATION, pc); +} + +static void +l3ni1_setup_ack_req(struct l3_process *pc, u_char pr, + void *arg) +{ + newl3state(pc, 25); + L3DelTimer(&pc->timer); + L3AddTimer(&pc->timer, T302, CC_T302); + l3ni1_message(pc, MT_SETUP_ACKNOWLEDGE); +} + +/********************************************/ +/* deliver a incoming display message to HL */ +/********************************************/ +static void +l3ni1_deliver_display(struct l3_process *pc, int pr, u_char *infp) +{ u_char len; + isdn_ctrl ic; + struct IsdnCardState *cs; + char *p; + + if (*infp++ != IE_DISPLAY) return; + if ((len = *infp++) > 80) return; /* total length <= 82 */ + if (!pc->chan) return; + + p = ic.parm.display; + while (len--) + *p++ = *infp++; + *p = '\0'; + ic.command = ISDN_STAT_DISPLAY; + cs = pc->st->l1.hardware; + ic.driver = cs->myid; + ic.arg = pc->chan->chan; + cs->iif.statcallb(&ic); +} /* l3ni1_deliver_display */ + + +static void +l3ni1_progress(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int err = 0; + u_char *p; + + if ((p = findie(skb->data, skb->len, IE_PROGRESS, 0))) { + if (p[1] != 2) { + err = 1; + pc->para.cause = 100; + } else if (!(p[2] & 0x70)) { + switch (p[2]) { + case 0x80: + case 0x81: + case 0x82: + case 0x84: + case 0x85: + case 0x87: + case 0x8a: + switch (p[3]) { + case 0x81: + case 0x82: + case 0x83: + case 0x84: + case 0x88: + break; + default: + err = 2; + pc->para.cause = 100; + break; + } + break; + default: + err = 3; + pc->para.cause = 100; + break; + } + } + } else { + pc->para.cause = 96; + err = 4; + } + if (err) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "progress error %d", err); + l3ni1_status_send(pc, pr, NULL); + return; + } + /* Now we are on none mandatory IEs */ + err = check_infoelements(pc, skb, ie_PROGRESS); + if (err) + l3ni1_std_ie_err(pc, err); + if (ERR_IE_COMPREHENSION != err) + pc->st->l3.l3l4(pc->st, CC_PROGRESS | INDICATION, pc); +} + +static void +l3ni1_notify(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int err = 0; + u_char *p; + + if ((p = findie(skb->data, skb->len, IE_NOTIFY, 0))) { + if (p[1] != 1) { + err = 1; + pc->para.cause = 100; + } else { + switch (p[2]) { + case 0x80: + case 0x81: + case 0x82: + break; + default: + pc->para.cause = 100; + err = 2; + break; + } + } + } else { + pc->para.cause = 96; + err = 3; + } + if (err) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "notify error %d", err); + l3ni1_status_send(pc, pr, NULL); + return; + } + /* Now we are on none mandatory IEs */ + err = check_infoelements(pc, skb, ie_NOTIFY); + if (err) + l3ni1_std_ie_err(pc, err); + if (ERR_IE_COMPREHENSION != err) + pc->st->l3.l3l4(pc->st, CC_NOTIFY | INDICATION, pc); +} + +static void +l3ni1_status_enq(struct l3_process *pc, u_char pr, void *arg) +{ + int ret; + struct sk_buff *skb = arg; + + ret = check_infoelements(pc, skb, ie_STATUS_ENQUIRY); + l3ni1_std_ie_err(pc, ret); + pc->para.cause = 30; /* response to STATUS_ENQUIRY */ + l3ni1_status_send(pc, pr, NULL); +} + +static void +l3ni1_information(struct l3_process *pc, u_char pr, void *arg) +{ + int ret; + struct sk_buff *skb = arg; + u_char *p; + char tmp[32]; + + ret = check_infoelements(pc, skb, ie_INFORMATION); + if (ret) + l3ni1_std_ie_err(pc, ret); + if (pc->state == 25) { /* overlap receiving */ + L3DelTimer(&pc->timer); + p = skb->data; + if ((p = findie(p, skb->len, 0x70, 0))) { + iecpy(tmp, p, 1); + strcat(pc->para.setup.eazmsn, tmp); + pc->st->l3.l3l4(pc->st, CC_MORE_INFO | INDICATION, pc); + } + L3AddTimer(&pc->timer, T302, CC_T302); + } +} + +/******************************/ +/* handle deflection requests */ +/******************************/ +static void l3ni1_redir_req(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb; + u_char tmp[128]; + u_char *p = tmp; + u_char *subp; + u_char len_phone = 0; + u_char len_sub = 0; + int l; + + + strcpy(pc->prot.ni1.uus1_data,pc->chan->setup.eazmsn); /* copy uus element if available */ + if (!pc->chan->setup.phone[0]) + { pc->para.cause = -1; + l3ni1_disconnect_req(pc,pr,arg); /* disconnect immediately */ + return; + } /* only uus */ + + if (pc->prot.ni1.invoke_id) + free_invoke_id(pc->st,pc->prot.ni1.invoke_id); + + if (!(pc->prot.ni1.invoke_id = new_invoke_id(pc->st))) + return; + + MsgHead(p, pc->callref, MT_FACILITY); + + for (subp = pc->chan->setup.phone; (*subp) && (*subp != '.'); subp++) len_phone++; /* len of phone number */ + if (*subp++ == '.') len_sub = strlen(subp) + 2; /* length including info subaddress element */ + + *p++ = 0x1c; /* Facility info element */ + *p++ = len_phone + len_sub + 2 + 2 + 8 + 3 + 3; /* length of element */ + *p++ = 0x91; /* remote operations protocol */ + *p++ = 0xa1; /* invoke component */ + + *p++ = len_phone + len_sub + 2 + 2 + 8 + 3; /* length of data */ + *p++ = 0x02; /* invoke id tag, integer */ + *p++ = 0x01; /* length */ + *p++ = pc->prot.ni1.invoke_id; /* invoke id */ + *p++ = 0x02; /* operation value tag, integer */ + *p++ = 0x01; /* length */ + *p++ = 0x0D; /* Call Deflect */ + + *p++ = 0x30; /* sequence phone number */ + *p++ = len_phone + 2 + 2 + 3 + len_sub; /* length */ + + *p++ = 0x30; /* Deflected to UserNumber */ + *p++ = len_phone+2+len_sub; /* length */ + *p++ = 0x80; /* NumberDigits */ + *p++ = len_phone; /* length */ + for (l = 0; l < len_phone; l++) + *p++ = pc->chan->setup.phone[l]; + + if (len_sub) + { *p++ = 0x04; /* called party subaddress */ + *p++ = len_sub - 2; + while (*subp) *p++ = *subp++; + } + + *p++ = 0x01; /* screening identifier */ + *p++ = 0x01; + *p++ = pc->chan->setup.screen; + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) return; + memcpy(skb_put(skb, l), tmp, l); + + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} /* l3ni1_redir_req */ + +/********************************************/ +/* handle deflection request in early state */ +/********************************************/ +static void l3ni1_redir_req_early(struct l3_process *pc, u_char pr, void *arg) +{ + l3ni1_proceed_req(pc,pr,arg); + l3ni1_redir_req(pc,pr,arg); +} /* l3ni1_redir_req_early */ + +/***********************************************/ +/* handle special commands for this protocol. */ +/* Examples are call independant services like */ +/* remote operations with dummy callref. */ +/***********************************************/ +static int l3ni1_cmd_global(struct PStack *st, isdn_ctrl *ic) +{ u_char id; + u_char temp[265]; + u_char *p = temp; + int i, l, proc_len; + struct sk_buff *skb; + struct l3_process *pc = NULL; + + switch (ic->arg) + { case NI1_CMD_INVOKE: + if (ic->parm.ni1_io.datalen < 0) return(-2); /* invalid parameter */ + + for (proc_len = 1, i = ic->parm.ni1_io.proc >> 8; i; i++) + i = i >> 8; /* add one byte */ + l = ic->parm.ni1_io.datalen + proc_len + 8; /* length excluding ie header */ + if (l > 255) + return(-2); /* too long */ + + if (!(id = new_invoke_id(st))) + return(0); /* first get a invoke id -> return if no available */ + + i = -1; + MsgHead(p, i, MT_FACILITY); /* build message head */ + *p++ = 0x1C; /* Facility IE */ + *p++ = l; /* length of ie */ + *p++ = 0x91; /* remote operations */ + *p++ = 0xA1; /* invoke */ + *p++ = l - 3; /* length of invoke */ + *p++ = 0x02; /* invoke id tag */ + *p++ = 0x01; /* length is 1 */ + *p++ = id; /* invoke id */ + *p++ = 0x02; /* operation */ + *p++ = proc_len; /* length of operation */ + + for (i = proc_len; i; i--) + *p++ = (ic->parm.ni1_io.proc >> (i-1)) & 0xFF; + memcpy(p, ic->parm.ni1_io.data, ic->parm.ni1_io.datalen); /* copy data */ + l = (p - temp) + ic->parm.ni1_io.datalen; /* total length */ + + if (ic->parm.ni1_io.timeout > 0) + if (!(pc = ni1_new_l3_process(st, -1))) + { free_invoke_id(st, id); + return(-2); + } + pc->prot.ni1.ll_id = ic->parm.ni1_io.ll_id; /* remember id */ + pc->prot.ni1.proc = ic->parm.ni1_io.proc; /* and procedure */ + + if (!(skb = l3_alloc_skb(l))) + { free_invoke_id(st, id); + if (pc) ni1_release_l3_process(pc); + return(-2); + } + memcpy(skb_put(skb, l), temp, l); + + if (pc) + { pc->prot.ni1.invoke_id = id; /* remember id */ + L3AddTimer(&pc->timer, ic->parm.ni1_io.timeout, CC_TNI1_IO | REQUEST); + } + + l3_msg(st, DL_DATA | REQUEST, skb); + ic->parm.ni1_io.hl_id = id; /* return id */ + return(0); + + case NI1_CMD_INVOKE_ABORT: + if ((pc = l3ni1_search_dummy_proc(st, ic->parm.ni1_io.hl_id))) + { L3DelTimer(&pc->timer); /* remove timer */ + ni1_release_l3_process(pc); + return(0); + } + else + { l3_debug(st, "l3ni1_cmd_global abort unknown id"); + return(-2); + } + break; + + default: + l3_debug(st, "l3ni1_cmd_global unknown cmd 0x%lx", ic->arg); + return(-1); + } /* switch ic-> arg */ + return(-1); +} /* l3ni1_cmd_global */ + +static void +l3ni1_io_timer(struct l3_process *pc) +{ isdn_ctrl ic; + struct IsdnCardState *cs = pc->st->l1.hardware; + + L3DelTimer(&pc->timer); /* remove timer */ + + ic.driver = cs->myid; + ic.command = ISDN_STAT_PROT; + ic.arg = NI1_STAT_INVOKE_ERR; + ic.parm.ni1_io.hl_id = pc->prot.ni1.invoke_id; + ic.parm.ni1_io.ll_id = pc->prot.ni1.ll_id; + ic.parm.ni1_io.proc = pc->prot.ni1.proc; + ic.parm.ni1_io.timeout= -1; + ic.parm.ni1_io.datalen = 0; + ic.parm.ni1_io.data = NULL; + free_invoke_id(pc->st, pc->prot.ni1.invoke_id); + pc->prot.ni1.invoke_id = 0; /* reset id */ + + cs->iif.statcallb(&ic); + + ni1_release_l3_process(pc); +} /* l3ni1_io_timer */ + +static void +l3ni1_release_ind(struct l3_process *pc, u_char pr, void *arg) +{ + u_char *p; + struct sk_buff *skb = arg; + int callState = 0; + p = skb->data; + + if ((p = findie(p, skb->len, IE_CALL_STATE, 0))) { + p++; + if (1 == *p++) + callState = *p; + } + if (callState == 0) { + /* ETS 300-104 7.6.1, 8.6.1, 10.6.1... and 16.1 + * set down layer 3 without sending any message + */ + pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc); + newl3state(pc, 0); + ni1_release_l3_process(pc); + } else { + pc->st->l3.l3l4(pc->st, CC_IGNORE | INDICATION, pc); + } +} + +static void +l3ni1_dummy(struct l3_process *pc, u_char pr, void *arg) +{ +} + +static void +l3ni1_t302(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->para.loc = 0; + pc->para.cause = 28; /* invalid number */ + l3ni1_disconnect_req(pc, pr, NULL); + pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc); +} + +static void +l3ni1_t303(struct l3_process *pc, u_char pr, void *arg) +{ + if (pc->N303 > 0) { + pc->N303--; + L3DelTimer(&pc->timer); + l3ni1_setup_req(pc, pr, arg); + } else { + L3DelTimer(&pc->timer); + l3ni1_message_cause(pc, MT_RELEASE_COMPLETE, 102); + pc->st->l3.l3l4(pc->st, CC_NOSETUP_RSP, pc); + ni1_release_l3_process(pc); + } +} + +static void +l3ni1_t304(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->para.loc = 0; + pc->para.cause = 102; + l3ni1_disconnect_req(pc, pr, NULL); + pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc); + +} + +static void +l3ni1_t305(struct l3_process *pc, u_char pr, void *arg) +{ + u_char tmp[16]; + u_char *p = tmp; + int l; + struct sk_buff *skb; + u_char cause = 16; + + L3DelTimer(&pc->timer); + if (pc->para.cause != NO_CAUSE) + cause = pc->para.cause; + + MsgHead(p, pc->callref, MT_RELEASE); + + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = cause | 0x80; + + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + newl3state(pc, 19); + l3_msg(pc->st, DL_DATA | REQUEST, skb); + L3AddTimer(&pc->timer, T308, CC_T308_1); +} + +static void +l3ni1_t310(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->para.loc = 0; + pc->para.cause = 102; + l3ni1_disconnect_req(pc, pr, NULL); + pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc); +} + +static void +l3ni1_t313(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->para.loc = 0; + pc->para.cause = 102; + l3ni1_disconnect_req(pc, pr, NULL); + pc->st->l3.l3l4(pc->st, CC_CONNECT_ERR, pc); +} + +static void +l3ni1_t308_1(struct l3_process *pc, u_char pr, void *arg) +{ + newl3state(pc, 19); + L3DelTimer(&pc->timer); + l3ni1_message(pc, MT_RELEASE); + L3AddTimer(&pc->timer, T308, CC_T308_2); +} + +static void +l3ni1_t308_2(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->st->l3.l3l4(pc->st, CC_RELEASE_ERR, pc); + ni1_release_l3_process(pc); +} + +static void +l3ni1_t318(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->para.cause = 102; /* Timer expiry */ + pc->para.loc = 0; /* local */ + pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc); + newl3state(pc, 19); + l3ni1_message(pc, MT_RELEASE); + L3AddTimer(&pc->timer, T308, CC_T308_1); +} + +static void +l3ni1_t319(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->para.cause = 102; /* Timer expiry */ + pc->para.loc = 0; /* local */ + pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc); + newl3state(pc, 10); +} + +static void +l3ni1_restart(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc); + ni1_release_l3_process(pc); +} + +static void +l3ni1_status(struct l3_process *pc, u_char pr, void *arg) +{ + u_char *p; + struct sk_buff *skb = arg; + int ret; + u_char cause = 0, callState = 0; + + if ((ret = l3ni1_get_cause(pc, skb))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "STATUS get_cause ret(%d)",ret); + if (ret < 0) + cause = 96; + else if (ret > 0) + cause = 100; + } + if ((p = findie(skb->data, skb->len, IE_CALL_STATE, 0))) { + p++; + if (1 == *p++) { + callState = *p; + if (!ie_in_set(pc, *p, l3_valid_states)) + cause = 100; + } else + cause = 100; + } else + cause = 96; + if (!cause) { /* no error before */ + ret = check_infoelements(pc, skb, ie_STATUS); + if (ERR_IE_COMPREHENSION == ret) + cause = 96; + else if (ERR_IE_UNRECOGNIZED == ret) + cause = 99; + } + if (cause) { + u_char tmp; + + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "STATUS error(%d/%d)",ret,cause); + tmp = pc->para.cause; + pc->para.cause = cause; + l3ni1_status_send(pc, 0, NULL); + if (cause == 99) + pc->para.cause = tmp; + else + return; + } + cause = pc->para.cause; + if (((cause & 0x7f) == 111) && (callState == 0)) { + /* ETS 300-104 7.6.1, 8.6.1, 10.6.1... + * if received MT_STATUS with cause == 111 and call + * state == 0, then we must set down layer 3 + */ + pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc); + newl3state(pc, 0); + ni1_release_l3_process(pc); + } +} + +static void +l3ni1_facility(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + ret = check_infoelements(pc, skb, ie_FACILITY); + l3ni1_std_ie_err(pc, ret); + { + u_char *p; + if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) + l3ni1_parse_facility(pc->st, pc, pc->callref, p); + } +} + +static void +l3ni1_suspend_req(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb; + u_char tmp[32]; + u_char *p = tmp; + u_char i, l; + u_char *msg = pc->chan->setup.phone; + + MsgHead(p, pc->callref, MT_SUSPEND); + l = *msg++; + if (l && (l <= 10)) { /* Max length 10 octets */ + *p++ = IE_CALL_ID; + *p++ = l; + for (i = 0; i < l; i++) + *p++ = *msg++; + } else if (l) { + l3_debug(pc->st, "SUS wrong CALL_ID len %d", l); + return; + } + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); + newl3state(pc, 15); + L3AddTimer(&pc->timer, T319, CC_T319); +} + +static void +l3ni1_suspend_ack(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + L3DelTimer(&pc->timer); + newl3state(pc, 0); + pc->para.cause = NO_CAUSE; + pc->st->l3.l3l4(pc->st, CC_SUSPEND | CONFIRM, pc); + /* We don't handle suspend_ack for IE errors now */ + if ((ret = check_infoelements(pc, skb, ie_SUSPEND_ACKNOWLEDGE))) + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "SUSPACK check ie(%d)",ret); + ni1_release_l3_process(pc); +} + +static void +l3ni1_suspend_rej(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + if ((ret = l3ni1_get_cause(pc, skb))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "SUSP_REJ get_cause ret(%d)",ret); + if (ret < 0) + pc->para.cause = 96; + else + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + ret = check_infoelements(pc, skb, ie_SUSPEND_REJECT); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); + pc->st->l3.l3l4(pc->st, CC_SUSPEND_ERR, pc); + newl3state(pc, 10); + if (ret) /* STATUS for none mandatory IE errors after actions are taken */ + l3ni1_std_ie_err(pc, ret); +} + +static void +l3ni1_resume_req(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb; + u_char tmp[32]; + u_char *p = tmp; + u_char i, l; + u_char *msg = pc->para.setup.phone; + + MsgHead(p, pc->callref, MT_RESUME); + + l = *msg++; + if (l && (l <= 10)) { /* Max length 10 octets */ + *p++ = IE_CALL_ID; + *p++ = l; + for (i = 0; i < l; i++) + *p++ = *msg++; + } else if (l) { + l3_debug(pc->st, "RES wrong CALL_ID len %d", l); + return; + } + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(pc->st, DL_DATA | REQUEST, skb); + newl3state(pc, 17); + L3AddTimer(&pc->timer, T318, CC_T318); +} + +static void +l3ni1_resume_ack(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int id, ret; + + if ((id = l3ni1_get_channel_id(pc, skb)) > 0) { + if ((0 == id) || ((3 == id) && (0x10 == pc->para.moderate))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "resume ack with wrong chid %x", id); + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + pc->para.bchannel = id; + } else if (1 == pc->state) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "resume ack without chid (ret %d)", id); + pc->para.cause = 96; + l3ni1_status_send(pc, pr, NULL); + return; + } + ret = check_infoelements(pc, skb, ie_RESUME_ACKNOWLEDGE); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); + pc->st->l3.l3l4(pc->st, CC_RESUME | CONFIRM, pc); + newl3state(pc, 10); + if (ret) /* STATUS for none mandatory IE errors after actions are taken */ + l3ni1_std_ie_err(pc, ret); +} + +static void +l3ni1_resume_rej(struct l3_process *pc, u_char pr, void *arg) +{ + struct sk_buff *skb = arg; + int ret; + + if ((ret = l3ni1_get_cause(pc, skb))) { + if (pc->debug & L3_DEB_WARN) + l3_debug(pc->st, "RES_REJ get_cause ret(%d)",ret); + if (ret < 0) + pc->para.cause = 96; + else + pc->para.cause = 100; + l3ni1_status_send(pc, pr, NULL); + return; + } + ret = check_infoelements(pc, skb, ie_RESUME_REJECT); + if (ERR_IE_COMPREHENSION == ret) { + l3ni1_std_ie_err(pc, ret); + return; + } + L3DelTimer(&pc->timer); + pc->st->l3.l3l4(pc->st, CC_RESUME_ERR, pc); + newl3state(pc, 0); + if (ret) /* STATUS for none mandatory IE errors after actions are taken */ + l3ni1_std_ie_err(pc, ret); + ni1_release_l3_process(pc); +} + +static void +l3ni1_global_restart(struct l3_process *pc, u_char pr, void *arg) +{ + u_char tmp[32]; + u_char *p; + u_char ri, ch = 0, chan = 0; + int l; + struct sk_buff *skb = arg; + struct l3_process *up; + + newl3state(pc, 2); + L3DelTimer(&pc->timer); + p = skb->data; + if ((p = findie(p, skb->len, IE_RESTART_IND, 0))) { + ri = p[2]; + l3_debug(pc->st, "Restart %x", ri); + } else { + l3_debug(pc->st, "Restart without restart IE"); + ri = 0x86; + } + p = skb->data; + if ((p = findie(p, skb->len, IE_CHANNEL_ID, 0))) { + chan = p[2] & 3; + ch = p[2]; + if (pc->st->l3.debug) + l3_debug(pc->st, "Restart for channel %d", chan); + } + newl3state(pc, 2); + up = pc->st->l3.proc; + while (up) { + if ((ri & 7) == 7) + up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up); + else if (up->para.bchannel == chan) + up->st->lli.l4l3(up->st, CC_RESTART | REQUEST, up); + + up = up->next; + } + p = tmp; + MsgHead(p, pc->callref, MT_RESTART_ACKNOWLEDGE); + if (chan) { + *p++ = IE_CHANNEL_ID; + *p++ = 1; + *p++ = ch | 0x80; + } + *p++ = 0x79; /* RESTART Ind */ + *p++ = 1; + *p++ = ri; + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + newl3state(pc, 0); + l3_msg(pc->st, DL_DATA | REQUEST, skb); +} + +static void +l3ni1_dl_reset(struct l3_process *pc, u_char pr, void *arg) +{ + pc->para.cause = 0x29; /* Temporary failure */ + pc->para.loc = 0; + l3ni1_disconnect_req(pc, pr, NULL); + pc->st->l3.l3l4(pc->st, CC_SETUP_ERR, pc); +} + +static void +l3ni1_dl_release(struct l3_process *pc, u_char pr, void *arg) +{ + newl3state(pc, 0); + pc->para.cause = 0x1b; /* Destination out of order */ + pc->para.loc = 0; + pc->st->l3.l3l4(pc->st, CC_RELEASE | INDICATION, pc); + release_l3_process(pc); +} + +static void +l3ni1_dl_reestablish(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + L3AddTimer(&pc->timer, T309, CC_T309); + l3_msg(pc->st, DL_ESTABLISH | REQUEST, NULL); +} + +static void +l3ni1_dl_reest_status(struct l3_process *pc, u_char pr, void *arg) +{ + L3DelTimer(&pc->timer); + + pc->para.cause = 0x1F; /* normal, unspecified */ + l3ni1_status_send(pc, 0, NULL); +} + +static void l3ni1_SendSpid( struct l3_process *pc, u_char pr, struct sk_buff *skb, int iNewState ) +{ + u_char * p; + char * pSPID; + struct Channel * pChan = pc->st->lli.userdata; + int l; + + if ( skb ) + dev_kfree_skb( skb); + + if ( !( pSPID = strchr( pChan->setup.eazmsn, ':' ) ) ) + { + printk( KERN_ERR "SPID not supplied in EAZMSN %s\n", pChan->setup.eazmsn ); + newl3state( pc, 0 ); + pc->st->l3.l3l2( pc->st, DL_RELEASE | REQUEST, NULL ); + return; + } + + l = strlen( ++pSPID ); + if ( !( skb = l3_alloc_skb( 5+l ) ) ) + { + printk( KERN_ERR "HiSax can't get memory to send SPID\n" ); + return; + } + + p = skb_put( skb, 5 ); + *p++ = PROTO_DIS_EURO; + *p++ = 0; + *p++ = MT_INFORMATION; + *p++ = IE_SPID; + *p++ = l; + + memcpy( skb_put( skb, l ), pSPID, l ); + + newl3state( pc, iNewState ); + + L3DelTimer( &pc->timer ); + L3AddTimer( &pc->timer, TSPID, CC_TSPID ); + + pc->st->l3.l3l2( pc->st, DL_DATA | REQUEST, skb ); +} + +static void l3ni1_spid_send( struct l3_process *pc, u_char pr, void *arg ) +{ + l3ni1_SendSpid( pc, pr, arg, 20 ); +} + +void l3ni1_spid_epid( struct l3_process *pc, u_char pr, void *arg ) +{ + struct sk_buff *skb = arg; + + if ( skb->data[ 1 ] == 0 ) + if ( skb->data[ 3 ] == IE_ENDPOINT_ID ) + { + L3DelTimer( &pc->timer ); + newl3state( pc, 0 ); + l3_msg( pc->st, DL_ESTABLISH | CONFIRM, NULL ); + } + dev_kfree_skb( skb); +} + +static void l3ni1_spid_tout( struct l3_process *pc, u_char pr, void *arg ) +{ + if ( pc->state < 22 ) + l3ni1_SendSpid( pc, pr, arg, pc->state+1 ); + else + { + L3DelTimer( &pc->timer ); + dev_kfree_skb( arg); + + printk( KERN_ERR "SPID not accepted\n" ); + newl3state( pc, 0 ); + pc->st->l3.l3l2( pc->st, DL_RELEASE | REQUEST, NULL ); + } +} + +/* *INDENT-OFF* */ +static struct stateentry downstatelist[] = +{ + {SBIT(0), + CC_SETUP | REQUEST, l3ni1_setup_req}, + {SBIT(0), + CC_RESUME | REQUEST, l3ni1_resume_req}, + {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(25), + CC_DISCONNECT | REQUEST, l3ni1_disconnect_req}, + {SBIT(12), + CC_RELEASE | REQUEST, l3ni1_release_req}, + {ALL_STATES, + CC_RESTART | REQUEST, l3ni1_restart}, + {SBIT(6) | SBIT(25), + CC_IGNORE | REQUEST, l3ni1_reset}, + {SBIT(6) | SBIT(25), + CC_REJECT | REQUEST, l3ni1_reject_req}, + {SBIT(6) | SBIT(25), + CC_PROCEED_SEND | REQUEST, l3ni1_proceed_req}, + {SBIT(6), + CC_MORE_INFO | REQUEST, l3ni1_setup_ack_req}, + {SBIT(25), + CC_MORE_INFO | REQUEST, l3ni1_dummy}, + {SBIT(6) | SBIT(9) | SBIT(25), + CC_ALERTING | REQUEST, l3ni1_alert_req}, + {SBIT(6) | SBIT(7) | SBIT(9) | SBIT(25), + CC_SETUP | RESPONSE, l3ni1_setup_rsp}, + {SBIT(10), + CC_SUSPEND | REQUEST, l3ni1_suspend_req}, + {SBIT(7) | SBIT(9) | SBIT(25), + CC_REDIR | REQUEST, l3ni1_redir_req}, + {SBIT(6), + CC_REDIR | REQUEST, l3ni1_redir_req_early}, + {SBIT(9) | SBIT(25), + CC_DISCONNECT | REQUEST, l3ni1_disconnect_req}, + {SBIT(25), + CC_T302, l3ni1_t302}, + {SBIT(1), + CC_T303, l3ni1_t303}, + {SBIT(2), + CC_T304, l3ni1_t304}, + {SBIT(3), + CC_T310, l3ni1_t310}, + {SBIT(8), + CC_T313, l3ni1_t313}, + {SBIT(11), + CC_T305, l3ni1_t305}, + {SBIT(15), + CC_T319, l3ni1_t319}, + {SBIT(17), + CC_T318, l3ni1_t318}, + {SBIT(19), + CC_T308_1, l3ni1_t308_1}, + {SBIT(19), + CC_T308_2, l3ni1_t308_2}, + {SBIT(10), + CC_T309, l3ni1_dl_release}, + { SBIT( 20 ) | SBIT( 21 ) | SBIT( 22 ), + CC_TSPID, l3ni1_spid_tout }, +}; + +#define DOWNSLLEN \ + (sizeof(downstatelist) / sizeof(struct stateentry)) + +static struct stateentry datastatelist[] = +{ + {ALL_STATES, + MT_STATUS_ENQUIRY, l3ni1_status_enq}, + {ALL_STATES, + MT_FACILITY, l3ni1_facility}, + {SBIT(19), + MT_STATUS, l3ni1_release_ind}, + {ALL_STATES, + MT_STATUS, l3ni1_status}, + {SBIT(0), + MT_SETUP, l3ni1_setup}, + {SBIT(6) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) | + SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25), + MT_SETUP, l3ni1_dummy}, + {SBIT(1) | SBIT(2), + MT_CALL_PROCEEDING, l3ni1_call_proc}, + {SBIT(1), + MT_SETUP_ACKNOWLEDGE, l3ni1_setup_ack}, + {SBIT(2) | SBIT(3), + MT_ALERTING, l3ni1_alerting}, + {SBIT(2) | SBIT(3), + MT_PROGRESS, l3ni1_progress}, + {SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | + SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25), + MT_INFORMATION, l3ni1_information}, + {SBIT(10) | SBIT(11) | SBIT(15), + MT_NOTIFY, l3ni1_notify}, + {SBIT(0) | SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(10) | + SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(19) | SBIT(25), + MT_RELEASE_COMPLETE, l3ni1_release_cmpl}, + {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(12) | SBIT(15) | SBIT(17) | SBIT(25), + MT_RELEASE, l3ni1_release}, + {SBIT(19), MT_RELEASE, l3ni1_release_ind}, + {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4) | SBIT(7) | SBIT(8) | SBIT(9) | SBIT(10) | SBIT(11) | SBIT(15) | SBIT(17) | SBIT(25), + MT_DISCONNECT, l3ni1_disconnect}, + {SBIT(19), + MT_DISCONNECT, l3ni1_dummy}, + {SBIT(1) | SBIT(2) | SBIT(3) | SBIT(4), + MT_CONNECT, l3ni1_connect}, + {SBIT(8), + MT_CONNECT_ACKNOWLEDGE, l3ni1_connect_ack}, + {SBIT(15), + MT_SUSPEND_ACKNOWLEDGE, l3ni1_suspend_ack}, + {SBIT(15), + MT_SUSPEND_REJECT, l3ni1_suspend_rej}, + {SBIT(17), + MT_RESUME_ACKNOWLEDGE, l3ni1_resume_ack}, + {SBIT(17), + MT_RESUME_REJECT, l3ni1_resume_rej}, +}; + +#define DATASLLEN \ + (sizeof(datastatelist) / sizeof(struct stateentry)) + +static struct stateentry globalmes_list[] = +{ + {ALL_STATES, + MT_STATUS, l3ni1_status}, + {SBIT(0), + MT_RESTART, l3ni1_global_restart}, +/* {SBIT(1), + MT_RESTART_ACKNOWLEDGE, l3ni1_restart_ack}, +*/ + { SBIT( 0 ), MT_DL_ESTABLISHED, l3ni1_spid_send }, + { SBIT( 20 ) | SBIT( 21 ) | SBIT( 22 ), MT_INFORMATION, l3ni1_spid_epid }, +}; +#define GLOBALM_LEN \ + (sizeof(globalmes_list) / sizeof(struct stateentry)) + +static struct stateentry manstatelist[] = +{ + {SBIT(2), + DL_ESTABLISH | INDICATION, l3ni1_dl_reset}, + {SBIT(10), + DL_ESTABLISH | CONFIRM, l3ni1_dl_reest_status}, + {SBIT(10), + DL_RELEASE | INDICATION, l3ni1_dl_reestablish}, + {ALL_STATES, + DL_RELEASE | INDICATION, l3ni1_dl_release}, +}; + +#define MANSLLEN \ + (sizeof(manstatelist) / sizeof(struct stateentry)) +/* *INDENT-ON* */ + + +static void +global_handler(struct PStack *st, int mt, struct sk_buff *skb) +{ + u_char tmp[16]; + u_char *p = tmp; + int l; + int i; + struct l3_process *proc = st->l3.global; + + if ( skb ) + proc->callref = skb->data[2]; /* cr flag */ + else + proc->callref = 0; + for (i = 0; i < GLOBALM_LEN; i++) + if ((mt == globalmes_list[i].primitive) && + ((1 << proc->state) & globalmes_list[i].state)) + break; + if (i == GLOBALM_LEN) { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "ni1 global state %d mt %x unhandled", + proc->state, mt); + } + MsgHead(p, proc->callref, MT_STATUS); + *p++ = IE_CAUSE; + *p++ = 0x2; + *p++ = 0x80; + *p++ = 81 |0x80; /* invalid cr */ + *p++ = 0x14; /* CallState */ + *p++ = 0x1; + *p++ = proc->state & 0x3f; + l = p - tmp; + if (!(skb = l3_alloc_skb(l))) + return; + memcpy(skb_put(skb, l), tmp, l); + l3_msg(proc->st, DL_DATA | REQUEST, skb); + } else { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "ni1 global %d mt %x", + proc->state, mt); + } + globalmes_list[i].rout(proc, mt, skb); + } +} + +static void +ni1up(struct PStack *st, int pr, void *arg) +{ + int i, mt, cr, cause, callState; + char *ptr; + u_char *p; + struct sk_buff *skb = arg; + struct l3_process *proc; + + switch (pr) { + case (DL_DATA | INDICATION): + case (DL_UNIT_DATA | INDICATION): + break; + case (DL_ESTABLISH | INDICATION): + case (DL_RELEASE | INDICATION): + case (DL_RELEASE | CONFIRM): + l3_msg(st, pr, arg); + return; + break; + + case (DL_ESTABLISH | CONFIRM): + global_handler( st, MT_DL_ESTABLISHED, NULL ); + return; + + default: + printk(KERN_ERR "HiSax ni1up unknown pr=%04x\n", pr); + return; + } + if (skb->len < 3) { + l3_debug(st, "ni1up frame too short(%d)", skb->len); + dev_kfree_skb(skb); + return; + } + + if (skb->data[0] != PROTO_DIS_EURO) { + if (st->l3.debug & L3_DEB_PROTERR) { + l3_debug(st, "ni1up%sunexpected discriminator %x message len %d", + (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ", + skb->data[0], skb->len); + } + dev_kfree_skb(skb); + return; + } + cr = getcallref(skb->data); + if (skb->len < ((skb->data[1] & 0x0f) + 3)) { + l3_debug(st, "ni1up frame too short(%d)", skb->len); + dev_kfree_skb(skb); + return; + } + mt = skb->data[skb->data[1] + 2]; + if (st->l3.debug & L3_DEB_STATE) + l3_debug(st, "ni1up cr %d", cr); + if (cr == -2) { /* wrong Callref */ + if (st->l3.debug & L3_DEB_WARN) + l3_debug(st, "ni1up wrong Callref"); + dev_kfree_skb(skb); + return; + } else if (cr == -1) { /* Dummy Callref */ + if (mt == MT_FACILITY) + { + if ((p = findie(skb->data, skb->len, IE_FACILITY, 0))) { + l3ni1_parse_facility(st, NULL, + (pr == (DL_DATA | INDICATION)) ? -1 : -2, p); + dev_kfree_skb(skb); + return; + } + } + else + { + global_handler(st, mt, skb); + return; + } + + if (st->l3.debug & L3_DEB_WARN) + l3_debug(st, "ni1up dummy Callref (no facility msg or ie)"); + dev_kfree_skb(skb); + return; + } else if ((((skb->data[1] & 0x0f) == 1) && (0==(cr & 0x7f))) || + (((skb->data[1] & 0x0f) == 2) && (0==(cr & 0x7fff)))) { /* Global CallRef */ + if (st->l3.debug & L3_DEB_STATE) + l3_debug(st, "ni1up Global CallRef"); + global_handler(st, mt, skb); + dev_kfree_skb(skb); + return; + } else if (!(proc = getl3proc(st, cr))) { + /* No transaction process exist, that means no call with + * this callreference is active + */ + if (mt == MT_SETUP) { + /* Setup creates a new transaction process */ + if (skb->data[2] & 0x80) { + /* Setup with wrong CREF flag */ + if (st->l3.debug & L3_DEB_STATE) + l3_debug(st, "ni1up wrong CRef flag"); + dev_kfree_skb(skb); + return; + } + if (!(proc = ni1_new_l3_process(st, cr))) { + /* May be to answer with RELEASE_COMPLETE and + * CAUSE 0x2f "Resource unavailable", but this + * need a new_l3_process too ... arghh + */ + dev_kfree_skb(skb); + return; + } + } else if (mt == MT_STATUS) { + cause = 0; + if ((ptr = findie(skb->data, skb->len, IE_CAUSE, 0)) != NULL) { + ptr++; + if (*ptr++ == 2) + ptr++; + cause = *ptr & 0x7f; + } + callState = 0; + if ((ptr = findie(skb->data, skb->len, IE_CALL_STATE, 0)) != NULL) { + ptr++; + if (*ptr++ == 2) + ptr++; + callState = *ptr; + } + /* ETS 300-104 part 2.4.1 + * if setup has not been made and a message type + * MT_STATUS is received with call state == 0, + * we must send nothing + */ + if (callState != 0) { + /* ETS 300-104 part 2.4.2 + * if setup has not been made and a message type + * MT_STATUS is received with call state != 0, + * we must send MT_RELEASE_COMPLETE cause 101 + */ + if ((proc = ni1_new_l3_process(st, cr))) { + proc->para.cause = 101; + l3ni1_msg_without_setup(proc, 0, NULL); + } + } + dev_kfree_skb(skb); + return; + } else if (mt == MT_RELEASE_COMPLETE) { + dev_kfree_skb(skb); + return; + } else { + /* ETS 300-104 part 2 + * if setup has not been made and a message type + * (except MT_SETUP and RELEASE_COMPLETE) is received, + * we must send MT_RELEASE_COMPLETE cause 81 */ + dev_kfree_skb(skb); + if ((proc = ni1_new_l3_process(st, cr))) { + proc->para.cause = 81; + l3ni1_msg_without_setup(proc, 0, NULL); + } + return; + } + } + if (l3ni1_check_messagetype_validity(proc, mt, skb)) { + dev_kfree_skb(skb); + return; + } + if ((p = findie(skb->data, skb->len, IE_DISPLAY, 0)) != NULL) + l3ni1_deliver_display(proc, pr, p); /* Display IE included */ + for (i = 0; i < DATASLLEN; i++) + if ((mt == datastatelist[i].primitive) && + ((1 << proc->state) & datastatelist[i].state)) + break; + if (i == DATASLLEN) { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "ni1up%sstate %d mt %#x unhandled", + (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ", + proc->state, mt); + } + if ((MT_RELEASE_COMPLETE != mt) && (MT_RELEASE != mt)) { + proc->para.cause = 101; + l3ni1_status_send(proc, pr, skb); + } + } else { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "ni1up%sstate %d mt %x", + (pr == (DL_DATA | INDICATION)) ? " " : "(broadcast) ", + proc->state, mt); + } + datastatelist[i].rout(proc, pr, skb); + } + dev_kfree_skb(skb); + return; +} + +static void +ni1down(struct PStack *st, int pr, void *arg) +{ + int i, cr; + struct l3_process *proc; + struct Channel *chan; + + if ((DL_ESTABLISH | REQUEST) == pr) { + l3_msg(st, pr, NULL); + return; + } else if (((CC_SETUP | REQUEST) == pr) || ((CC_RESUME | REQUEST) == pr)) { + chan = arg; + cr = newcallref(); + cr |= 0x80; + if ((proc = ni1_new_l3_process(st, cr))) { + proc->chan = chan; + chan->proc = proc; + memcpy(&proc->para.setup, &chan->setup, sizeof(setup_parm)); + proc->callref = cr; + } + } else { + proc = arg; + } + if (!proc) { + printk(KERN_ERR "HiSax ni1down without proc pr=%04x\n", pr); + return; + } + + if ( pr == (CC_TNI1_IO | REQUEST)) { + l3ni1_io_timer(proc); /* timer expires */ + return; + } + + for (i = 0; i < DOWNSLLEN; i++) + if ((pr == downstatelist[i].primitive) && + ((1 << proc->state) & downstatelist[i].state)) + break; + if (i == DOWNSLLEN) { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "ni1down state %d prim %#x unhandled", + proc->state, pr); + } + } else { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "ni1down state %d prim %#x", + proc->state, pr); + } + downstatelist[i].rout(proc, pr, arg); + } +} + +static void +ni1man(struct PStack *st, int pr, void *arg) +{ + int i; + struct l3_process *proc = arg; + + if (!proc) { + printk(KERN_ERR "HiSax ni1man without proc pr=%04x\n", pr); + return; + } + for (i = 0; i < MANSLLEN; i++) + if ((pr == manstatelist[i].primitive) && + ((1 << proc->state) & manstatelist[i].state)) + break; + if (i == MANSLLEN) { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "cr %d ni1man state %d prim %#x unhandled", + proc->callref & 0x7f, proc->state, pr); + } + } else { + if (st->l3.debug & L3_DEB_STATE) { + l3_debug(st, "cr %d ni1man state %d prim %#x", + proc->callref & 0x7f, proc->state, pr); + } + manstatelist[i].rout(proc, pr, arg); + } +} + +void +setstack_ni1(struct PStack *st) +{ + char tmp[64]; + int i; + + st->lli.l4l3 = ni1down; + st->lli.l4l3_proto = l3ni1_cmd_global; + st->l2.l2l3 = ni1up; + st->l3.l3ml3 = ni1man; + st->l3.N303 = 1; + st->prot.ni1.last_invoke_id = 0; + st->prot.ni1.invoke_used[0] = 1; /* Bit 0 must always be set to 1 */ + i = 1; + while (i < 32) + st->prot.ni1.invoke_used[i++] = 0; + + if (!(st->l3.global = kmalloc(sizeof(struct l3_process), GFP_ATOMIC))) { + printk(KERN_ERR "HiSax can't get memory for ni1 global CR\n"); + } else { + st->l3.global->state = 0; + st->l3.global->callref = 0; + st->l3.global->next = NULL; + st->l3.global->debug = L3_DEB_WARN; + st->l3.global->st = st; + st->l3.global->N303 = 1; + st->l3.global->prot.ni1.invoke_id = 0; + + L3InitTimer(st->l3.global, &st->l3.global->timer); + } + strcpy(tmp, ni1_revision); + printk(KERN_INFO "HiSax: National ISDN-1 Rev. %s\n", HiSax_getrev(tmp)); +} |