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capi.c
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/*
* Kernel CAPI interface for the Gigaset driver
*
* Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
*
* =====================================================================
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* =====================================================================
*/
#include "gigaset.h"
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/ratelimit.h>
#include <linux/isdn/capilli.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/export.h>
/* missing from kernelcapi.h */
#define CapiNcpiNotSupportedByProtocol 0x0001
#define CapiFlagsNotSupportedByProtocol 0x0002
#define CapiAlertAlreadySent 0x0003
#define CapiFacilitySpecificFunctionNotSupported 0x3011
/* missing from capicmd.h */
#define CAPI_CONNECT_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 2 + 8 * 1)
#define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 3 * 1)
#define CAPI_CONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 1)
#define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 1)
#define CAPI_DATA_B3_REQ_LEN64 (CAPI_MSG_BASELEN + 4 + 4 + 2 + 2 + 2 + 8)
#define CAPI_DATA_B3_CONF_LEN (CAPI_MSG_BASELEN + 4 + 2 + 2)
#define CAPI_DISCONNECT_IND_LEN (CAPI_MSG_BASELEN + 4 + 2)
#define CAPI_DISCONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN + 4 + 2 + 1)
#define CAPI_FACILITY_CONF_BASELEN (CAPI_MSG_BASELEN + 4 + 2 + 2 + 1)
/* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
#define CAPI_STDCONF_LEN (CAPI_MSG_BASELEN + 4 + 2)
#define CAPI_FACILITY_HANDSET 0x0000
#define CAPI_FACILITY_DTMF 0x0001
#define CAPI_FACILITY_V42BIS 0x0002
#define CAPI_FACILITY_SUPPSVC 0x0003
#define CAPI_FACILITY_WAKEUP 0x0004
#define CAPI_FACILITY_LI 0x0005
#define CAPI_SUPPSVC_GETSUPPORTED 0x0000
#define CAPI_SUPPSVC_LISTEN 0x0001
/* missing from capiutil.h */
#define CAPIMSG_PLCI_PART(m) CAPIMSG_U8(m, 9)
#define CAPIMSG_NCCI_PART(m) CAPIMSG_U16(m, 10)
#define CAPIMSG_HANDLE_REQ(m) CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
#define CAPIMSG_FLAGS(m) CAPIMSG_U16(m, 20)
#define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
#define CAPIMSG_SETPLCI_PART(m, plci) capimsg_setu8(m, 9, plci)
#define CAPIMSG_SETNCCI_PART(m, ncci) capimsg_setu16(m, 10, ncci)
#define CAPIMSG_SETFLAGS(m, flags) capimsg_setu16(m, 20, flags)
/* parameters with differing location in DATA_B3_CONF/_RESP: */
#define CAPIMSG_SETHANDLE_CONF(m, handle) capimsg_setu16(m, 12, handle)
#define CAPIMSG_SETINFO_CONF(m, info) capimsg_setu16(m, 14, info)
/* Flags (DATA_B3_REQ/_IND) */
#define CAPI_FLAGS_DELIVERY_CONFIRMATION 0x04
#define CAPI_FLAGS_RESERVED (~0x1f)
/* buffer sizes */
#define MAX_BC_OCTETS 11
#define MAX_HLC_OCTETS 3
#define MAX_NUMBER_DIGITS 20
#define MAX_FMT_IE_LEN 20
/* values for bcs->apconnstate */
#define APCONN_NONE 0 /* inactive/listening */
#define APCONN_SETUP 1 /* connecting */
#define APCONN_ACTIVE 2 /* B channel up */
/* registered application data structure */
struct gigaset_capi_appl {
struct list_head ctrlist;
struct gigaset_capi_appl *bcnext;
u16 id;
struct capi_register_params rp;
u16 nextMessageNumber;
u32 listenInfoMask;
u32 listenCIPmask;
};
/* CAPI specific controller data structure */
struct gigaset_capi_ctr {
struct capi_ctr ctr;
struct list_head appls;
struct sk_buff_head sendqueue;
atomic_t sendqlen;
/* two _cmsg structures possibly used concurrently: */
_cmsg hcmsg; /* for message composition triggered from hardware */
_cmsg acmsg; /* for dissection of messages sent from application */
u8 bc_buf[MAX_BC_OCTETS + 1];
u8 hlc_buf[MAX_HLC_OCTETS + 1];
u8 cgpty_buf[MAX_NUMBER_DIGITS + 3];
u8 cdpty_buf[MAX_NUMBER_DIGITS + 2];
};
/* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
static struct {
u8 *bc;
u8 *hlc;
} cip2bchlc[] = {
[1] = { "8090A3", NULL }, /* Speech (A-law) */
[2] = { "8890", NULL }, /* Unrestricted digital information */
[3] = { "8990", NULL }, /* Restricted digital information */
[4] = { "9090A3", NULL }, /* 3,1 kHz audio (A-law) */
[5] = { "9190", NULL }, /* 7 kHz audio */
[6] = { "9890", NULL }, /* Video */
[7] = { "88C0C6E6", NULL }, /* Packet mode */
[8] = { "8890218F", NULL }, /* 56 kbit/s rate adaptation */
[9] = { "9190A5", NULL }, /* Unrestricted digital information
* with tones/announcements */
[16] = { "8090A3", "9181" }, /* Telephony */
[17] = { "9090A3", "9184" }, /* Group 2/3 facsimile */
[18] = { "8890", "91A1" }, /* Group 4 facsimile Class 1 */
[19] = { "8890", "91A4" }, /* Teletex service basic and mixed mode
* and Group 4 facsimile service
* Classes II and III */
[20] = { "8890", "91A8" }, /* Teletex service basic and
* processable mode */
[21] = { "8890", "91B1" }, /* Teletex service basic mode */
[22] = { "8890", "91B2" }, /* International interworking for
* Videotex */
[23] = { "8890", "91B5" }, /* Telex */
[24] = { "8890", "91B8" }, /* Message Handling Systems
* in accordance with X.400 */
[25] = { "8890", "91C1" }, /* OSI application
* in accordance with X.200 */
[26] = { "9190A5", "9181" }, /* 7 kHz telephony */
[27] = { "9190A5", "916001" }, /* Video telephony, first connection */
[28] = { "8890", "916002" }, /* Video telephony, second connection */
};
/*
* helper functions
* ================
*/
/*
* emit unsupported parameter warning
*/
static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
char *msgname, char *paramname)
{
if (param && *param)
dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
msgname, paramname);
}
/*
* convert an IE from Gigaset hex string to ETSI binary representation
* including length byte
* return value: result length, -1 on error
*/
static int encode_ie(char *in, u8 *out, int maxlen)
{
int l = 0;
while (*in) {
if (!isxdigit(in[0]) || !isxdigit(in[1]) || l >= maxlen)
return -1;
out[++l] = (hex_to_bin(in[0]) << 4) + hex_to_bin(in[1]);
in += 2;
}
out[0] = l;
return l;
}
/*
* convert an IE from ETSI binary representation including length byte
* to Gigaset hex string
*/
static void decode_ie(u8 *in, char *out)
{
int i = *in;
while (i-- > 0) {
/* ToDo: conversion to upper case necessary? */
*out++ = toupper(hex_asc_hi(*++in));
*out++ = toupper(hex_asc_lo(*in));
}
}
/*
* retrieve application data structure for an application ID
*/
static inline struct gigaset_capi_appl *
get_appl(struct gigaset_capi_ctr *iif, u16 appl)
{
struct gigaset_capi_appl *ap;
list_for_each_entry(ap, &iif->appls, ctrlist)
if (ap->id == appl)
return ap;
return NULL;
}
/*
* dump CAPI message to kernel messages for debugging
*/
static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
{
#ifdef CONFIG_GIGASET_DEBUG
/* dump at most 20 messages in 20 secs */
static DEFINE_RATELIMIT_STATE(msg_dump_ratelimit, 20 * HZ, 20);
_cdebbuf *cdb;
if (!(gigaset_debuglevel & level))
return;
if (!___ratelimit(&msg_dump_ratelimit, tag))
return;
cdb = capi_cmsg2str(p);
if (cdb) {
gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
cdebbuf_free(cdb);
} else {
gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
capi_cmd2str(p->Command, p->Subcommand));
}
#endif
}
static inline void dump_rawmsg(enum debuglevel level, const char *tag,
unsigned char *data)
{
#ifdef CONFIG_GIGASET_DEBUG
char *dbgline;
int i, l;
if (!(gigaset_debuglevel & level))
return;
l = CAPIMSG_LEN(data);
if (l < 12) {
gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
return;
}
gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
CAPIMSG_CONTROL(data));
l -= 12;
if (l <= 0)
return;
if (l > 64)
l = 64; /* arbitrary limit */
dbgline = kmalloc(3 * l, GFP_ATOMIC);
if (!dbgline)
return;
for (i = 0; i < l; i++) {
dbgline[3 * i] = hex_asc_hi(data[12 + i]);
dbgline[3 * i + 1] = hex_asc_lo(data[12 + i]);
dbgline[3 * i + 2] = ' ';
}
dbgline[3 * l - 1] = '\0';
gig_dbg(level, " %s", dbgline);
kfree(dbgline);
if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
(CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
CAPIMSG_SUBCOMMAND(data) == CAPI_IND)) {
l = CAPIMSG_DATALEN(data);
gig_dbg(level, " DataLength=%d", l);
if (l <= 0 || !(gigaset_debuglevel & DEBUG_LLDATA))
return;
if (l > 64)
l = 64; /* arbitrary limit */
dbgline = kmalloc(3 * l, GFP_ATOMIC);
if (!dbgline)
return;
data += CAPIMSG_LEN(data);
for (i = 0; i < l; i++) {
dbgline[3 * i] = hex_asc_hi(data[i]);
dbgline[3 * i + 1] = hex_asc_lo(data[i]);
dbgline[3 * i + 2] = ' ';
}
dbgline[3 * l - 1] = '\0';
gig_dbg(level, " %s", dbgline);
kfree(dbgline);
}
#endif
}
/*
* format CAPI IE as string
*/
#ifdef CONFIG_GIGASET_DEBUG
static const char *format_ie(const char *ie)
{
static char result[3 * MAX_FMT_IE_LEN];
int len, count;
char *pout = result;
if (!ie)
return "NULL";
count = len = ie[0];
if (count > MAX_FMT_IE_LEN)
count = MAX_FMT_IE_LEN - 1;
while (count--) {
*pout++ = hex_asc_hi(*++ie);
*pout++ = hex_asc_lo(*ie);
*pout++ = ' ';
}
if (len > MAX_FMT_IE_LEN) {
*pout++ = '.';
*pout++ = '.';
*pout++ = '.';
}
*--pout = 0;
return result;
}
#endif
/*
* emit DATA_B3_CONF message
*/
static void send_data_b3_conf(struct cardstate *cs, struct capi_ctr *ctr,
u16 appl, u16 msgid, int channel,
u16 handle, u16 info)
{
struct sk_buff *cskb;
u8 *msg;
cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
if (!cskb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
/* frequent message, avoid _cmsg overhead */
msg = __skb_put(cskb, CAPI_DATA_B3_CONF_LEN);
CAPIMSG_SETLEN(msg, CAPI_DATA_B3_CONF_LEN);
CAPIMSG_SETAPPID(msg, appl);
CAPIMSG_SETCOMMAND(msg, CAPI_DATA_B3);
CAPIMSG_SETSUBCOMMAND(msg, CAPI_CONF);
CAPIMSG_SETMSGID(msg, msgid);
CAPIMSG_SETCONTROLLER(msg, ctr->cnr);
CAPIMSG_SETPLCI_PART(msg, channel);
CAPIMSG_SETNCCI_PART(msg, 1);
CAPIMSG_SETHANDLE_CONF(msg, handle);
CAPIMSG_SETINFO_CONF(msg, info);
/* emit message */
dump_rawmsg(DEBUG_MCMD, __func__, msg);
capi_ctr_handle_message(ctr, appl, cskb);
}
/*
* driver interface functions
* ==========================
*/
/**
* gigaset_skb_sent() - acknowledge transmission of outgoing skb
* @bcs: B channel descriptor structure.
* @skb: sent data.
*
* Called by hardware module {bas,ser,usb}_gigaset when the data in a
* skb has been successfully sent, for signalling completion to the LL.
*/
void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_ctr *iif = cs->iif;
struct gigaset_capi_appl *ap = bcs->ap;
unsigned char *req = skb_mac_header(dskb);
u16 flags;
/* update statistics */
++bcs->trans_up;
if (!ap) {
gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
return;
}
/* don't send further B3 messages if disconnected */
if (bcs->apconnstate < APCONN_ACTIVE) {
gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
return;
}
/*
* send DATA_B3_CONF if "delivery confirmation" bit was set in request;
* otherwise it has already been sent by do_data_b3_req()
*/
flags = CAPIMSG_FLAGS(req);
if (flags & CAPI_FLAGS_DELIVERY_CONFIRMATION)
send_data_b3_conf(cs, &iif->ctr, ap->id, CAPIMSG_MSGID(req),
bcs->channel + 1, CAPIMSG_HANDLE_REQ(req),
(flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) ?
CapiFlagsNotSupportedByProtocol :
CAPI_NOERROR);
}
EXPORT_SYMBOL_GPL(gigaset_skb_sent);
/**
* gigaset_skb_rcvd() - pass received skb to LL
* @bcs: B channel descriptor structure.
* @skb: received data.
*
* Called by hardware module {bas,ser,usb}_gigaset when user data has
* been successfully received, for passing to the LL.
* Warning: skb must not be accessed anymore!
*/
void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_ctr *iif = cs->iif;
struct gigaset_capi_appl *ap = bcs->ap;
int len = skb->len;
/* update statistics */
bcs->trans_down++;
if (!ap) {
gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
dev_kfree_skb_any(skb);
return;
}
/* don't send further B3 messages if disconnected */
if (bcs->apconnstate < APCONN_ACTIVE) {
gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
dev_kfree_skb_any(skb);
return;
}
/*
* prepend DATA_B3_IND message to payload
* Parameters: NCCI = 1, all others 0/unused
* frequent message, avoid _cmsg overhead
*/
skb_push(skb, CAPI_DATA_B3_REQ_LEN);
CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
CAPIMSG_SETAPPID(skb->data, ap->id);
CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
CAPIMSG_SETNCCI_PART(skb->data, 1);
/* Data parameter not used */
CAPIMSG_SETDATALEN(skb->data, len);
/* Data handle parameter not used */
CAPIMSG_SETFLAGS(skb->data, 0);
/* Data64 parameter not present */
/* emit message */
dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
/**
* gigaset_isdn_rcv_err() - signal receive error
* @bcs: B channel descriptor structure.
*
* Called by hardware module {bas,ser,usb}_gigaset when a receive error
* has occurred, for signalling to the LL.
*/
void gigaset_isdn_rcv_err(struct bc_state *bcs)
{
/* if currently ignoring packets, just count down */
if (bcs->ignore) {
bcs->ignore--;
return;
}
/* update statistics */
bcs->corrupted++;
/* ToDo: signal error -> LL */
}
EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
/**
* gigaset_isdn_icall() - signal incoming call
* @at_state: connection state structure.
*
* Called by main module at tasklet level to notify the LL that an incoming
* call has been received. @at_state contains the parameters of the call.
*
* Return value: call disposition (ICALL_*)
*/
int gigaset_isdn_icall(struct at_state_t *at_state)
{
struct cardstate *cs = at_state->cs;
struct bc_state *bcs = at_state->bcs;
struct gigaset_capi_ctr *iif = cs->iif;
struct gigaset_capi_appl *ap;
u32 actCIPmask;
struct sk_buff *skb;
unsigned int msgsize;
unsigned long flags;
int i;
/*
* ToDo: signal calls without a free B channel, too
* (requires a u8 handle for the at_state structure that can
* be stored in the PLCI and used in the CONNECT_RESP message
* handler to retrieve it)
*/
if (!bcs)
return ICALL_IGNORE;
/* prepare CONNECT_IND message, using B channel number as PLCI */
capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
iif->ctr.cnr | ((bcs->channel + 1) << 8));
/* minimum size, all structs empty */
msgsize = CAPI_CONNECT_IND_BASELEN;
/* Bearer Capability (mandatory) */
if (at_state->str_var[STR_ZBC]) {
/* pass on BC from Gigaset */
if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
MAX_BC_OCTETS) < 0) {
dev_warn(cs->dev, "RING ignored - bad BC %s\n",
at_state->str_var[STR_ZBC]);
return ICALL_IGNORE;
}
/* look up corresponding CIP value */
iif->hcmsg.CIPValue = 0; /* default if nothing found */
for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
if (cip2bchlc[i].bc != NULL &&
cip2bchlc[i].hlc == NULL &&
!strcmp(cip2bchlc[i].bc,
at_state->str_var[STR_ZBC])) {
iif->hcmsg.CIPValue = i;
break;
}
} else {
/* no BC (internal call): assume CIP 1 (speech, A-law) */
iif->hcmsg.CIPValue = 1;
encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
}
iif->hcmsg.BC = iif->bc_buf;
msgsize += iif->hcmsg.BC[0];
/* High Layer Compatibility (optional) */
if (at_state->str_var[STR_ZHLC]) {
/* pass on HLC from Gigaset */
if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
MAX_HLC_OCTETS) < 0) {
dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
at_state->str_var[STR_ZHLC]);
return ICALL_IGNORE;
}
iif->hcmsg.HLC = iif->hlc_buf;
msgsize += iif->hcmsg.HLC[0];
/* look up corresponding CIP value */
/* keep BC based CIP value if none found */
if (at_state->str_var[STR_ZBC])
for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
if (cip2bchlc[i].hlc != NULL &&
!strcmp(cip2bchlc[i].hlc,
at_state->str_var[STR_ZHLC]) &&
!strcmp(cip2bchlc[i].bc,
at_state->str_var[STR_ZBC])) {
iif->hcmsg.CIPValue = i;
break;
}
}
/* Called Party Number (optional) */
if (at_state->str_var[STR_ZCPN]) {
i = strlen(at_state->str_var[STR_ZCPN]);
if (i > MAX_NUMBER_DIGITS) {
dev_warn(cs->dev, "RING ignored - bad number %s\n",
at_state->str_var[STR_ZBC]);
return ICALL_IGNORE;
}
iif->cdpty_buf[0] = i + 1;
iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
memcpy(iif->cdpty_buf + 2, at_state->str_var[STR_ZCPN], i);
iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
msgsize += iif->hcmsg.CalledPartyNumber[0];
}
/* Calling Party Number (optional) */
if (at_state->str_var[STR_NMBR]) {
i = strlen(at_state->str_var[STR_NMBR]);
if (i > MAX_NUMBER_DIGITS) {
dev_warn(cs->dev, "RING ignored - bad number %s\n",
at_state->str_var[STR_ZBC]);
return ICALL_IGNORE;
}
iif->cgpty_buf[0] = i + 2;
iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
memcpy(iif->cgpty_buf + 3, at_state->str_var[STR_NMBR], i);
iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
msgsize += iif->hcmsg.CallingPartyNumber[0];
}
/* remaining parameters (not supported, always left NULL):
* - CalledPartySubaddress
* - CallingPartySubaddress
* - AdditionalInfo
* - BChannelinformation
* - Keypadfacility
* - Useruserdata
* - Facilitydataarray
*/
gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
format_ie(iif->hcmsg.BC));
gig_dbg(DEBUG_CMD, "icall: HLC %s",
format_ie(iif->hcmsg.HLC));
gig_dbg(DEBUG_CMD, "icall: CgPty %s",
format_ie(iif->hcmsg.CallingPartyNumber));
gig_dbg(DEBUG_CMD, "icall: CdPty %s",
format_ie(iif->hcmsg.CalledPartyNumber));
/* scan application list for matching listeners */
spin_lock_irqsave(&bcs->aplock, flags);
if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE) {
dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
__func__, bcs->ap, bcs->apconnstate);
bcs->ap = NULL;
bcs->apconnstate = APCONN_NONE;
}
spin_unlock_irqrestore(&bcs->aplock, flags);
actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
list_for_each_entry(ap, &iif->appls, ctrlist)
if (actCIPmask & ap->listenCIPmask) {
/* build CONNECT_IND message for this application */
iif->hcmsg.ApplId = ap->id;
iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
skb = alloc_skb(msgsize, GFP_ATOMIC);
if (!skb) {
dev_err(cs->dev, "%s: out of memory\n",
__func__);
break;
}
if (capi_cmsg2message(&iif->hcmsg,
__skb_put(skb, msgsize))) {
dev_err(cs->dev, "%s: message parser failure\n",
__func__);
dev_kfree_skb_any(skb);
break;
}
dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
/* add to listeners on this B channel, update state */
spin_lock_irqsave(&bcs->aplock, flags);
ap->bcnext = bcs->ap;
bcs->ap = ap;
bcs->chstate |= CHS_NOTIFY_LL;
bcs->apconnstate = APCONN_SETUP;
spin_unlock_irqrestore(&bcs->aplock, flags);
/* emit message */
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/*
* Return "accept" if any listeners.
* Gigaset will send ALERTING.
* There doesn't seem to be a way to avoid this.
*/
return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
}
/*
* send a DISCONNECT_IND message to an application
* does not sleep, clobbers the controller's hcmsg structure
*/
static void send_disconnect_ind(struct bc_state *bcs,
struct gigaset_capi_appl *ap, u16 reason)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_ctr *iif = cs->iif;
struct sk_buff *skb;
if (bcs->apconnstate == APCONN_NONE)
return;
capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
ap->nextMessageNumber++,
iif->ctr.cnr | ((bcs->channel + 1) << 8));
iif->hcmsg.Reason = reason;
skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
if (!skb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
if (capi_cmsg2message(&iif->hcmsg,
__skb_put(skb, CAPI_DISCONNECT_IND_LEN))) {
dev_err(cs->dev, "%s: message parser failure\n", __func__);
dev_kfree_skb_any(skb);
return;
}
dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/*
* send a DISCONNECT_B3_IND message to an application
* Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
* does not sleep, clobbers the controller's hcmsg structure
*/
static void send_disconnect_b3_ind(struct bc_state *bcs,
struct gigaset_capi_appl *ap)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_ctr *iif = cs->iif;
struct sk_buff *skb;
/* nothing to do if no logical connection active */
if (bcs->apconnstate < APCONN_ACTIVE)
return;
bcs->apconnstate = APCONN_SETUP;
capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
ap->nextMessageNumber++,
iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
if (!skb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
if (capi_cmsg2message(&iif->hcmsg,
__skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN))) {
dev_err(cs->dev, "%s: message parser failure\n", __func__);
dev_kfree_skb_any(skb);
return;
}
dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/**
* gigaset_isdn_connD() - signal D channel connect
* @bcs: B channel descriptor structure.
*
* Called by main module at tasklet level to notify the LL that the D channel
* connection has been established.
*/
void gigaset_isdn_connD(struct bc_state *bcs)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_ctr *iif = cs->iif;
struct gigaset_capi_appl *ap;
struct sk_buff *skb;
unsigned int msgsize;
unsigned long flags;
spin_lock_irqsave(&bcs->aplock, flags);
ap = bcs->ap;
if (!ap) {
spin_unlock_irqrestore(&bcs->aplock, flags);
gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
return;
}
if (bcs->apconnstate == APCONN_NONE) {
spin_unlock_irqrestore(&bcs->aplock, flags);
dev_warn(cs->dev, "%s: application %u not connected\n",
__func__, ap->id);
return;
}
spin_unlock_irqrestore(&bcs->aplock, flags);
while (ap->bcnext) {
/* this should never happen */
dev_warn(cs->dev, "%s: dropping extra application %u\n",
__func__, ap->bcnext->id);
send_disconnect_ind(bcs, ap->bcnext,
CapiCallGivenToOtherApplication);
ap->bcnext = ap->bcnext->bcnext;
}
/* prepare CONNECT_ACTIVE_IND message
* Note: LLC not supported by device
*/
capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
ap->nextMessageNumber++,
iif->ctr.cnr | ((bcs->channel + 1) << 8));
/* minimum size, all structs empty */
msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
/* ToDo: set parameter: Connected number
* (requires ev-layer state machine extension to collect
* ZCON device reply)
*/
/* build and emit CONNECT_ACTIVE_IND message */
skb = alloc_skb(msgsize, GFP_ATOMIC);
if (!skb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
if (capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize))) {
dev_err(cs->dev, "%s: message parser failure\n", __func__);
dev_kfree_skb_any(skb);
return;
}
dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/**
* gigaset_isdn_hupD() - signal D channel hangup
* @bcs: B channel descriptor structure.
*
* Called by main module at tasklet level to notify the LL that the D channel
* connection has been shut down.
*/
void gigaset_isdn_hupD(struct bc_state *bcs)
{
struct gigaset_capi_appl *ap;
unsigned long flags;
/*
* ToDo: pass on reason code reported by device
* (requires ev-layer state machine extension to collect
* ZCAU device reply)
*/
spin_lock_irqsave(&bcs->aplock, flags);
while (bcs->ap != NULL) {
ap = bcs->ap;
bcs->ap = ap->bcnext;
spin_unlock_irqrestore(&bcs->aplock, flags);
send_disconnect_b3_ind(bcs, ap);
send_disconnect_ind(bcs, ap, 0);
spin_lock_irqsave(&bcs->aplock, flags);
}
bcs->apconnstate = APCONN_NONE;
spin_unlock_irqrestore(&bcs->aplock, flags);
}
/**
* gigaset_isdn_connB() - signal B channel connect
* @bcs: B channel descriptor structure.
*
* Called by main module at tasklet level to notify the LL that the B channel
* connection has been established.
*/
void gigaset_isdn_connB(struct bc_state *bcs)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_ctr *iif = cs->iif;
struct gigaset_capi_appl *ap;
struct sk_buff *skb;
unsigned long flags;
unsigned int msgsize;
u8 command;
spin_lock_irqsave(&bcs->aplock, flags);
ap = bcs->ap;
if (!ap) {
spin_unlock_irqrestore(&bcs->aplock, flags);
gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
return;
}
if (!bcs->apconnstate) {
spin_unlock_irqrestore(&bcs->aplock, flags);
dev_warn(cs->dev, "%s: application %u not connected\n",
__func__, ap->id);
return;
}
/*
* emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
* otherwise we have to emit CONNECT_B3_IND first, and follow up with
* CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
* Parameters in both cases always: NCCI = 1, NCPI empty
*/
if (bcs->apconnstate >= APCONN_ACTIVE) {
command = CAPI_CONNECT_B3_ACTIVE;
msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
} else {
command = CAPI_CONNECT_B3;
msgsize = CAPI_CONNECT_B3_IND_BASELEN;
}
bcs->apconnstate = APCONN_ACTIVE;
spin_unlock_irqrestore(&bcs->aplock, flags);
while (ap->bcnext) {
/* this should never happen */
dev_warn(cs->dev, "%s: dropping extra application %u\n",
__func__, ap->bcnext->id);
send_disconnect_ind(bcs, ap->bcnext,
CapiCallGivenToOtherApplication);
ap->bcnext = ap->bcnext->bcnext;
}
capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
ap->nextMessageNumber++,
iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
skb = alloc_skb(msgsize, GFP_ATOMIC);
if (!skb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
if (capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize))) {
dev_err(cs->dev, "%s: message parser failure\n", __func__);
dev_kfree_skb_any(skb);
return;
}
dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/**
* gigaset_isdn_hupB() - signal B channel hangup
* @bcs: B channel descriptor structure.
*
* Called by main module to notify the LL that the B channel connection has
* been shut down.
*/
void gigaset_isdn_hupB(struct bc_state *bcs)
{
struct gigaset_capi_appl *ap = bcs->ap;
/* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
if (!ap) {
gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
return;
}
send_disconnect_b3_ind(bcs, ap);
}
/**
* gigaset_isdn_start() - signal device availability
* @cs: device descriptor structure.
*
* Called by main module to notify the LL that the device is available for
* use.
*/
void gigaset_isdn_start(struct cardstate *cs)
{
struct gigaset_capi_ctr *iif = cs->iif;
/* fill profile data: manufacturer name */
strcpy(iif->ctr.manu, "Siemens");
/* CAPI and device version */
iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
iif->ctr.version.minorversion = 0;
/* ToDo: check/assert cs->gotfwver? */
iif->ctr.version.majormanuversion = cs->fwver[0];
iif->ctr.version.minormanuversion = cs->fwver[1];
/* number of B channels supported */
iif->ctr.profile.nbchannel = cs->channels;
/* global options: internal controller, supplementary services */
iif->ctr.profile.goptions = 0x11;
/* B1 protocols: 64 kbit/s HDLC or transparent */
iif->ctr.profile.support1 = 0x03;
/* B2 protocols: transparent only */
/* ToDo: X.75 SLP ? */
iif->ctr.profile.support2 = 0x02;
/* B3 protocols: transparent only */
iif->ctr.profile.support3 = 0x01;
/* no serial number */
strcpy(iif->ctr.serial, "0");
capi_ctr_ready(&iif->ctr);
}
/**
* gigaset_isdn_stop() - signal device unavailability
* @cs: device descriptor structure.
*
* Called by main module to notify the LL that the device is no longer
* available for use.
*/
void gigaset_isdn_stop(struct cardstate *cs)
{
struct gigaset_capi_ctr *iif = cs->iif;
capi_ctr_down(&iif->ctr);
}
/*
* kernel CAPI callback methods
* ============================
*/
/*
* register CAPI application
*/
static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
capi_register_params *rp)
{
struct gigaset_capi_ctr *iif