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kernel-ark/drivers/isdn/gigaset/capi.c
Jesper Juhl 2393c944d5 ISDN, Gigaset: Fix memory leak in do_disconnect_req() 
Hi,

In drivers/isdn/gigaset/capi.c::do_disconnect_req() we will leak the
memory allocated (with kmalloc) to 'b3cmsg' if the call to alloc_skb()
fails.

...
		b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
	allocation here ------^
		if (!b3cmsg) {
			dev_err(cs->dev, "%s: out of memory\n", __func__);
			send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
			return;
		}
		capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
				 ap->nextMessageNumber++,
				 cmsg->adr.adrPLCI | (1 << 16));
		b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
		b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
		if (b3skb == NULL) {
			dev_err(cs->dev, "%s: out of memory\n", __func__);
			send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
			return;
	leak here ------^
...

This leak is easily fixed by just kfree()'ing the memory allocated to
'b3cmsg' right before we return. The following patch does that.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-31 11:17:10 -08:00

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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/isdn/capilli.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.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
_cdebbuf *cdb;
if (!(gigaset_debuglevel & level))
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;
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
*/
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;
}
/*
* 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;
}
capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
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;
}
capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
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;
}
capi_cmsg2message(&iif->hcmsg,
__skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
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;
}
capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
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;
}
capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
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
= container_of(ctr, struct gigaset_capi_ctr, ctr);
struct cardstate *cs = ctr->driverdata;
struct gigaset_capi_appl *ap;
gig_dbg(DEBUG_CMD, "%s [%u] l3cnt=%u blkcnt=%u blklen=%u",
__func__, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
list_for_each_entry(ap, &iif->appls, ctrlist)
if (ap->id == appl) {
dev_notice(cs->dev,
"application %u already registered\n", appl);
return;
}
ap = kzalloc(sizeof(*ap), GFP_KERNEL);
if (!ap) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
ap->id = appl;
ap->rp = *rp;
list_add(&ap->ctrlist, &iif->appls);
dev_info(cs->dev, "application %u registered\n", ap->id);
}
/*
* remove CAPI application from channel
* helper function to keep indentation levels down and stay in 80 columns
*/
static inline void remove_appl_from_channel(struct bc_state *bcs,
struct gigaset_capi_appl *ap)
{
struct cardstate *cs = bcs->cs;
struct gigaset_capi_appl *bcap;
unsigned long flags;
int prevconnstate;
spin_lock_irqsave(&bcs->aplock, flags);
bcap = bcs->ap;
if (bcap == NULL) {
spin_unlock_irqrestore(&bcs->aplock, flags);
return;
}
/* check first application on channel */
if (bcap == ap) {
bcs->ap = ap->bcnext;
if (bcs->ap != NULL) {
spin_unlock_irqrestore(&bcs->aplock, flags);
return;
}
/* none left, clear channel state */
prevconnstate = bcs->apconnstate;
bcs->apconnstate = APCONN_NONE;
spin_unlock_irqrestore(&bcs->aplock, flags);
if (prevconnstate == APCONN_ACTIVE) {
dev_notice(cs->dev, "%s: hanging up channel %u\n",
__func__, bcs->channel);
gigaset_add_event(cs, &bcs->at_state,
EV_HUP, NULL, 0, NULL);
gigaset_schedule_event(cs);
}
return;
}
/* check remaining list */
do {
if (bcap->bcnext == ap) {
bcap->bcnext = bcap->bcnext->bcnext;
spin_unlock_irqrestore(&bcs->aplock, flags);
return;
}
bcap = bcap->bcnext;
} while (bcap != NULL);
spin_unlock_irqrestore(&bcs->aplock, flags);
}
/*
* release CAPI application
*/
static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
{
struct gigaset_capi_ctr *iif
= container_of(ctr, struct gigaset_capi_ctr, ctr);
struct cardstate *cs = iif->ctr.driverdata;
struct gigaset_capi_appl *ap, *tmp;
unsigned ch;
gig_dbg(DEBUG_CMD, "%s [%u]", __func__, appl);
list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
if (ap->id == appl) {
/* remove from any channels */
for (ch = 0; ch < cs->channels; ch++)
remove_appl_from_channel(&cs->bcs[ch], ap);
/* remove from registration list */
list_del(&ap->ctrlist);
kfree(ap);
dev_info(cs->dev, "application %u released\n", appl);
}
}
/*
* =====================================================================
* outgoing CAPI message handler
* =====================================================================
*/
/*
* helper function: emit reply message with given Info value
*/
static void send_conf(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb,
u16 info)
{
/*
* _CONF replies always only have NCCI and Info parameters
* so they'll fit into the _REQ message skb
*/
capi_cmsg_answer(&iif->acmsg);
iif->acmsg.Info = info;
capi_cmsg2message(&iif->acmsg, skb->data);
__skb_trim(skb, CAPI_STDCONF_LEN);
dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/*
* process FACILITY_REQ message
*/
static void do_facility_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct sk_buff *cskb;
u8 *pparam;
unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
u16 function, info;
static u8 confparam[10]; /* max. 9 octets + length byte */
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
/*
* Facility Request Parameter is not decoded by capi_message2cmsg()
* encoding depends on Facility Selector
*/
switch (cmsg->FacilitySelector) {
case CAPI_FACILITY_DTMF: /* ToDo */
info = CapiFacilityNotSupported;
confparam[0] = 2; /* length */
/* DTMF information: Unknown DTMF request */
capimsg_setu16(confparam, 1, 2);
break;
case CAPI_FACILITY_V42BIS: /* not supported */
info = CapiFacilityNotSupported;
confparam[0] = 2; /* length */
/* V.42 bis information: not available */
capimsg_setu16(confparam, 1, 1);
break;
case CAPI_FACILITY_SUPPSVC:
/* decode Function parameter */
pparam = cmsg->FacilityRequestParameter;
if (pparam == NULL || pparam[0] < 2) {
dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
"Facility Request Parameter");
send_conf(iif, ap, skb, CapiIllMessageParmCoding);
return;
}
function = CAPIMSG_U16(pparam, 1);
switch (function) {
case CAPI_SUPPSVC_GETSUPPORTED:
info = CapiSuccess;
/* Supplementary Service specific parameter */
confparam[3] = 6; /* length */
/* Supplementary services info: Success */
capimsg_setu16(confparam, 4, CapiSuccess);
/* Supported Services: none */
capimsg_setu32(confparam, 6, 0);
break;
case CAPI_SUPPSVC_LISTEN:
if (pparam[0] < 7 || pparam[3] < 4) {
dev_notice(cs->dev, "%s: %s missing\n",
"FACILITY_REQ", "Notification Mask");
send_conf(iif, ap, skb,
CapiIllMessageParmCoding);
return;
}
if (CAPIMSG_U32(pparam, 4) != 0) {
dev_notice(cs->dev,
"%s: unsupported supplementary service notification mask 0x%x\n",
"FACILITY_REQ", CAPIMSG_U32(pparam, 4));
info = CapiFacilitySpecificFunctionNotSupported;
confparam[3] = 2; /* length */
capimsg_setu16(confparam, 4,
CapiSupplementaryServiceNotSupported);
}
info = CapiSuccess;
confparam[3] = 2; /* length */
capimsg_setu16(confparam, 4, CapiSuccess);
break;
/* ToDo: add supported services */
default:
dev_notice(cs->dev,
"%s: unsupported supplementary service function 0x%04x\n",
"FACILITY_REQ", function);
info = CapiFacilitySpecificFunctionNotSupported;
/* Supplementary Service specific parameter */
confparam[3] = 2; /* length */
/* Supplementary services info: not supported */
capimsg_setu16(confparam, 4,
CapiSupplementaryServiceNotSupported);
}
/* Facility confirmation parameter */
confparam[0] = confparam[3] + 3; /* total length */
/* Function: copy from _REQ message */
capimsg_setu16(confparam, 1, function);
/* Supplementary Service specific parameter already set above */
break;
case CAPI_FACILITY_WAKEUP: /* ToDo */
info = CapiFacilityNotSupported;
confparam[0] = 2; /* length */
/* Number of accepted awake request parameters: 0 */
capimsg_setu16(confparam, 1, 0);
break;
default:
info = CapiFacilityNotSupported;
confparam[0] = 0; /* empty struct */
}
/* send FACILITY_CONF with given Info and confirmation parameter */
capi_cmsg_answer(cmsg);
cmsg->Info = info;
cmsg->FacilityConfirmationParameter = confparam;
msgsize += confparam[0]; /* length */
cskb = alloc_skb(msgsize, GFP_ATOMIC);
if (!cskb) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
return;
}
capi_cmsg2message(cmsg, __skb_put(cskb, msgsize));
dump_cmsg(DEBUG_CMD, __func__, cmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
}
/*
* process LISTEN_REQ message
* just store the masks in the application data structure
*/
static void do_listen_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
/* decode message */
capi_message2cmsg(&iif->acmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
/* store listening parameters */
ap->listenInfoMask = iif->acmsg.InfoMask;
ap->listenCIPmask = iif->acmsg.CIPmask;
send_conf(iif, ap, skb, CapiSuccess);
}
/*
* process ALERT_REQ message
* nothing to do, Gigaset always alerts anyway
*/
static void do_alert_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
/* decode message */
capi_message2cmsg(&iif->acmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
send_conf(iif, ap, skb, CapiAlertAlreadySent);
}
/*
* process CONNECT_REQ message
* allocate a B channel, prepare dial commands, queue a DIAL event,
* emit CONNECT_CONF reply
*/
static void do_connect_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct bc_state *bcs;
char **commands;
char *s;
u8 *pp;
unsigned long flags;
int i, l, lbc, lhlc;
u16 info;
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
/* get free B channel & construct PLCI */
bcs = gigaset_get_free_channel(cs);
if (!bcs) {
dev_notice(cs->dev, "%s: no B channel available\n",
"CONNECT_REQ");
send_conf(iif, ap, skb, CapiNoPlciAvailable);
return;
}
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);
ap->bcnext = NULL;
bcs->ap = ap;
bcs->apconnstate = APCONN_SETUP;
spin_unlock_irqrestore(&bcs->aplock, flags);
bcs->rx_bufsize = ap->rp.datablklen;
dev_kfree_skb(bcs->rx_skb);
gigaset_new_rx_skb(bcs);
cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
/* build command table */
commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
if (!commands)
goto oom;
/* encode parameter: Called party number */
pp = cmsg->CalledPartyNumber;
if (pp == NULL || *pp == 0) {
dev_notice(cs->dev, "%s: %s missing\n",
"CONNECT_REQ", "Called party number");
info = CapiIllMessageParmCoding;
goto error;
}
l = *pp++;
/* check type of number/numbering plan byte */
switch (*pp) {
case 0x80: /* unknown type / unknown numbering plan */
case 0x81: /* unknown type / ISDN/Telephony numbering plan */
break;
default: /* others: warn about potential misinterpretation */
dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
"CONNECT_REQ", "Called party number", *pp);
}
pp++;
l--;
/* translate "**" internal call prefix to CTP value */
if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
s = "^SCTP=0\r";
pp += 2;
l -= 2;
} else {
s = "^SCTP=1\r";
}
commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
if (!commands[AT_TYPE])
goto oom;
commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
if (!commands[AT_DIAL])
goto oom;
snprintf(commands[AT_DIAL], l+3, "D%.*s\r", l, pp);
/* encode parameter: Calling party number */
pp = cmsg->CallingPartyNumber;
if (pp != NULL && *pp > 0) {
l = *pp++;
/* check type of number/numbering plan byte */
/* ToDo: allow for/handle Ext=1? */
switch (*pp) {
case 0x00: /* unknown type / unknown numbering plan */
case 0x01: /* unknown type / ISDN/Telephony num. plan */
break;
default:
dev_notice(cs->dev,
"%s: %s type/plan 0x%02x unsupported\n",
"CONNECT_REQ", "Calling party number", *pp);
}
pp++;
l--;
/* check presentation indicator */
if (!l) {
dev_notice(cs->dev, "%s: %s IE truncated\n",
"CONNECT_REQ", "Calling party number");
info = CapiIllMessageParmCoding;
goto error;
}
switch (*pp & 0xfc) { /* ignore Screening indicator */
case 0x80: /* Presentation allowed */
s = "^SCLIP=1\r";
break;
case 0xa0: /* Presentation restricted */
s = "^SCLIP=0\r";
break;
default:
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"CONNECT_REQ",
"Presentation/Screening indicator",
*pp);
s = "^SCLIP=1\r";
}
commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
if (!commands[AT_CLIP])
goto oom;
pp++;
l--;
if (l) {
/* number */
commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
if (!commands[AT_MSN])
goto oom;
snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
}
}
/* check parameter: CIP Value */
if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
(cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
dev_notice(cs->dev, "%s: unknown CIP value %d\n",
"CONNECT_REQ", cmsg->CIPValue);
info = CapiCipValueUnknown;
goto error;
}
/*
* check/encode parameters: BC & HLC
* must be encoded together as device doesn't accept HLC separately
* explicit parameters override values derived from CIP
*/
/* determine lengths */
if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
lbc = 2*cmsg->BC[0];
else if (cip2bchlc[cmsg->CIPValue].bc) /* BC derived from CIP */
lbc = strlen(cip2bchlc[cmsg->CIPValue].bc);
else /* no BC */
lbc = 0;
if (cmsg->HLC && cmsg->HLC[0]) /* HLC specified explicitly */
lhlc = 2*cmsg->HLC[0];
else if (cip2bchlc[cmsg->CIPValue].hlc) /* HLC derived from CIP */
lhlc = strlen(cip2bchlc[cmsg->CIPValue].hlc);
else /* no HLC */
lhlc = 0;
if (lbc) {
/* have BC: allocate and assemble command string */
l = lbc + 7; /* "^SBC=" + value + "\r" + null byte */
if (lhlc)
l += lhlc + 7; /* ";^SHLC=" + value */
commands[AT_BC] = kmalloc(l, GFP_KERNEL);
if (!commands[AT_BC])
goto oom;
strcpy(commands[AT_BC], "^SBC=");
if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
decode_ie(cmsg->BC, commands[AT_BC] + 5);
else /* BC derived from CIP */
strcpy(commands[AT_BC] + 5,
cip2bchlc[cmsg->CIPValue].bc);
if (lhlc) {
strcpy(commands[AT_BC] + lbc + 5, ";^SHLC=");
if (cmsg->HLC && cmsg->HLC[0])
/* HLC specified explicitly */
decode_ie(cmsg->HLC,
commands[AT_BC] + lbc + 12);
else /* HLC derived from CIP */
strcpy(commands[AT_BC] + lbc + 12,
cip2bchlc[cmsg->CIPValue].hlc);
}
strcpy(commands[AT_BC] + l - 2, "\r");
} else {
/* no BC */
if (lhlc) {
dev_notice(cs->dev, "%s: cannot set HLC without BC\n",
"CONNECT_REQ");
info = CapiIllMessageParmCoding; /* ? */
goto error;
}
}
/* check/encode parameter: B Protocol */
if (cmsg->BProtocol == CAPI_DEFAULT) {
bcs->proto2 = L2_HDLC;
dev_warn(cs->dev,
"B2 Protocol X.75 SLP unsupported, using Transparent\n");
} else {
switch (cmsg->B1protocol) {
case 0:
bcs->proto2 = L2_HDLC;
break;
case 1:
bcs->proto2 = L2_VOICE;
break;
default:
dev_warn(cs->dev,
"B1 Protocol %u unsupported, using Transparent\n",
cmsg->B1protocol);
bcs->proto2 = L2_VOICE;
}
if (cmsg->B2protocol != 1)
dev_warn(cs->dev,
"B2 Protocol %u unsupported, using Transparent\n",
cmsg->B2protocol);
if (cmsg->B3protocol != 0)
dev_warn(cs->dev,
"B3 Protocol %u unsupported, using Transparent\n",
cmsg->B3protocol);
ignore_cstruct_param(cs, cmsg->B1configuration,
"CONNECT_REQ", "B1 Configuration");
ignore_cstruct_param(cs, cmsg->B2configuration,
"CONNECT_REQ", "B2 Configuration");
ignore_cstruct_param(cs, cmsg->B3configuration,
"CONNECT_REQ", "B3 Configuration");
}
commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
if (!commands[AT_PROTO])
goto oom;
snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
/* ToDo: check/encode remaining parameters */
ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
"CONNECT_REQ", "Called pty subaddr");
ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
"CONNECT_REQ", "Calling pty subaddr");
ignore_cstruct_param(cs, cmsg->LLC,
"CONNECT_REQ", "LLC");
if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
ignore_cstruct_param(cs, cmsg->BChannelinformation,
"CONNECT_REQ", "B Channel Information");
ignore_cstruct_param(cs, cmsg->Keypadfacility,
"CONNECT_REQ", "Keypad Facility");
ignore_cstruct_param(cs, cmsg->Useruserdata,
"CONNECT_REQ", "User-User Data");
ignore_cstruct_param(cs, cmsg->Facilitydataarray,
"CONNECT_REQ", "Facility Data Array");
}
/* encode parameter: B channel to use */
commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
if (!commands[AT_ISO])
goto oom;
snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
(unsigned) bcs->channel + 1);
/* queue & schedule EV_DIAL event */
if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
bcs->at_state.seq_index, NULL)) {
info = CAPI_MSGOSRESOURCEERR;
goto error;
}
gigaset_schedule_event(cs);
send_conf(iif, ap, skb, CapiSuccess);
return;
oom:
dev_err(cs->dev, "%s: out of memory\n", __func__);
info = CAPI_MSGOSRESOURCEERR;
error:
if (commands)
for (i = 0; i < AT_NUM; i++)
kfree(commands[i]);
kfree(commands);
gigaset_free_channel(bcs);
send_conf(iif, ap, skb, info);
}
/*
* process CONNECT_RESP message
* checks protocol parameters and queues an ACCEPT or HUP event
*/
static void do_connect_resp(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct bc_state *bcs;
struct gigaset_capi_appl *oap;
unsigned long flags;
int channel;
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
dev_kfree_skb_any(skb);
/* extract and check channel number from PLCI */
channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
if (!channel || channel > cs->channels) {
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
return;
}
bcs = cs->bcs + channel - 1;
switch (cmsg->Reject) {
case 0: /* Accept */
/* drop all competing applications, keep only this one */
spin_lock_irqsave(&bcs->aplock, flags);
while (bcs->ap != NULL) {
oap = bcs->ap;
bcs->ap = oap->bcnext;
if (oap != ap) {
spin_unlock_irqrestore(&bcs->aplock, flags);
send_disconnect_ind(bcs, oap,
CapiCallGivenToOtherApplication);
spin_lock_irqsave(&bcs->aplock, flags);
}
}
ap->bcnext = NULL;
bcs->ap = ap;
spin_unlock_irqrestore(&bcs->aplock, flags);
bcs->rx_bufsize = ap->rp.datablklen;
dev_kfree_skb(bcs->rx_skb);
gigaset_new_rx_skb(bcs);
bcs->chstate |= CHS_NOTIFY_LL;
/* check/encode B channel protocol */
if (cmsg->BProtocol == CAPI_DEFAULT) {
bcs->proto2 = L2_HDLC;
dev_warn(cs->dev,
"B2 Protocol X.75 SLP unsupported, using Transparent\n");
} else {
switch (cmsg->B1protocol) {
case 0:
bcs->proto2 = L2_HDLC;
break;
case 1:
bcs->proto2 = L2_VOICE;
break;
default:
dev_warn(cs->dev,
"B1 Protocol %u unsupported, using Transparent\n",
cmsg->B1protocol);
bcs->proto2 = L2_VOICE;
}
if (cmsg->B2protocol != 1)
dev_warn(cs->dev,
"B2 Protocol %u unsupported, using Transparent\n",
cmsg->B2protocol);
if (cmsg->B3protocol != 0)
dev_warn(cs->dev,
"B3 Protocol %u unsupported, using Transparent\n",
cmsg->B3protocol);
ignore_cstruct_param(cs, cmsg->B1configuration,
"CONNECT_RESP", "B1 Configuration");
ignore_cstruct_param(cs, cmsg->B2configuration,
"CONNECT_RESP", "B2 Configuration");
ignore_cstruct_param(cs, cmsg->B3configuration,
"CONNECT_RESP", "B3 Configuration");
}
/* ToDo: check/encode remaining parameters */
ignore_cstruct_param(cs, cmsg->ConnectedNumber,
"CONNECT_RESP", "Connected Number");
ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
"CONNECT_RESP", "Connected Subaddress");
ignore_cstruct_param(cs, cmsg->LLC,
"CONNECT_RESP", "LLC");
if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
ignore_cstruct_param(cs, cmsg->BChannelinformation,
"CONNECT_RESP", "BChannel Information");
ignore_cstruct_param(cs, cmsg->Keypadfacility,
"CONNECT_RESP", "Keypad Facility");
ignore_cstruct_param(cs, cmsg->Useruserdata,
"CONNECT_RESP", "User-User Data");
ignore_cstruct_param(cs, cmsg->Facilitydataarray,
"CONNECT_RESP", "Facility Data Array");
}
/* Accept call */
if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
EV_ACCEPT, NULL, 0, NULL))
return;
gigaset_schedule_event(cs);
return;
case 1: /* Ignore */
/* send DISCONNECT_IND to this application */
send_disconnect_ind(bcs, ap, 0);
/* remove it from the list of listening apps */
spin_lock_irqsave(&bcs->aplock, flags);
if (bcs->ap == ap) {
bcs->ap = ap->bcnext;
if (bcs->ap == NULL) {
/* last one: stop ev-layer hupD notifications */
bcs->apconnstate = APCONN_NONE;
bcs->chstate &= ~CHS_NOTIFY_LL;
}
spin_unlock_irqrestore(&bcs->aplock, flags);
return;
}
for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
if (oap->bcnext == ap) {
oap->bcnext = oap->bcnext->bcnext;
spin_unlock_irqrestore(&bcs->aplock, flags);
return;
}
}
spin_unlock_irqrestore(&bcs->aplock, flags);
dev_err(cs->dev, "%s: application %u not found\n",
__func__, ap->id);
return;
default: /* Reject */
/* drop all competing applications, keep only this one */
spin_lock_irqsave(&bcs->aplock, flags);
while (bcs->ap != NULL) {
oap = bcs->ap;
bcs->ap = oap->bcnext;
if (oap != ap) {
spin_unlock_irqrestore(&bcs->aplock, flags);
send_disconnect_ind(bcs, oap,
CapiCallGivenToOtherApplication);
spin_lock_irqsave(&bcs->aplock, flags);
}
}
ap->bcnext = NULL;
bcs->ap = ap;
spin_unlock_irqrestore(&bcs->aplock, flags);
/* reject call - will trigger DISCONNECT_IND for this app */
dev_info(cs->dev, "%s: Reject=%x\n",
"CONNECT_RESP", cmsg->Reject);
if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
EV_HUP, NULL, 0, NULL))
return;
gigaset_schedule_event(cs);
return;
}
}
/*
* process CONNECT_B3_REQ message
* build NCCI and emit CONNECT_B3_CONF reply
*/
static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct bc_state *bcs;
int channel;
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
/* extract and check channel number from PLCI */
channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
if (!channel || channel > cs->channels) {
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
send_conf(iif, ap, skb, CapiIllContrPlciNcci);
return;
}
bcs = &cs->bcs[channel-1];
/* mark logical connection active */
bcs->apconnstate = APCONN_ACTIVE;
/* build NCCI: always 1 (one B3 connection only) */
cmsg->adr.adrNCCI |= 1 << 16;
/* NCPI parameter: not applicable for B3 Transparent */
ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
CapiNcpiNotSupportedByProtocol : CapiSuccess);
}
/*
* process CONNECT_B3_RESP message
* Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
* or queue EV_HUP and emit DISCONNECT_B3_IND.
* The emitted message is always shorter than the received one,
* allowing to reuse the skb.
*/
static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct bc_state *bcs;
int channel;
unsigned int msgsize;
u8 command;
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
/* extract and check channel number and NCCI */
channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
if (!channel || channel > cs->channels ||
((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
dev_kfree_skb_any(skb);
return;
}
bcs = &cs->bcs[channel-1];
if (cmsg->Reject) {
/* Reject: clear B3 connect received flag */
bcs->apconnstate = APCONN_SETUP;
/* trigger hangup, causing eventual DISCONNECT_IND */
if (!gigaset_add_event(cs, &bcs->at_state,
EV_HUP, NULL, 0, NULL)) {
dev_kfree_skb_any(skb);
return;
}
gigaset_schedule_event(cs);
/* emit DISCONNECT_B3_IND */
command = CAPI_DISCONNECT_B3;
msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
} else {
/*
* Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
* we only send CONNECT_B3_IND if the B channel is up
*/
command = CAPI_CONNECT_B3_ACTIVE;
msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
}
capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
ap->nextMessageNumber++, cmsg->adr.adrNCCI);
__skb_trim(skb, msgsize);
capi_cmsg2message(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, skb);
}
/*
* process DISCONNECT_REQ message
* schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
* emit DISCONNECT_CONF reply
*/
static void do_disconnect_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct bc_state *bcs;
_cmsg *b3cmsg;
struct sk_buff *b3skb;
int channel;
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
/* extract and check channel number from PLCI */
channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
if (!channel || channel > cs->channels) {
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
send_conf(iif, ap, skb, CapiIllContrPlciNcci);
return;
}
bcs = cs->bcs + channel - 1;
/* ToDo: process parameter: Additional info */
if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
ignore_cstruct_param(cs, cmsg->BChannelinformation,
"DISCONNECT_REQ", "B Channel Information");
ignore_cstruct_param(cs, cmsg->Keypadfacility,
"DISCONNECT_REQ", "Keypad Facility");
ignore_cstruct_param(cs, cmsg->Useruserdata,
"DISCONNECT_REQ", "User-User Data");
ignore_cstruct_param(cs, cmsg->Facilitydataarray,
"DISCONNECT_REQ", "Facility Data Array");
}
/* skip if DISCONNECT_IND already sent */
if (!bcs->apconnstate)
return;
/* check for active logical connection */
if (bcs->apconnstate >= APCONN_ACTIVE) {
/*
* emit DISCONNECT_B3_IND with cause 0x3301
* use separate cmsg structure, as the content of iif->acmsg
* is still needed for creating the _CONF message
*/
b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
if (!b3cmsg) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
return;
}
capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
ap->nextMessageNumber++,
cmsg->adr.adrPLCI | (1 << 16));
b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
if (b3skb == NULL) {
dev_err(cs->dev, "%s: out of memory\n", __func__);
send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
kfree(b3cmsg);
return;
}
capi_cmsg2message(b3cmsg,
__skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
kfree(b3cmsg);
capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
}
/* trigger hangup, causing eventual DISCONNECT_IND */
if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
return;
}
gigaset_schedule_event(cs);
/* emit reply */
send_conf(iif, ap, skb, CapiSuccess);
}
/*
* process DISCONNECT_B3_REQ message
* schedule EV_HUP and emit DISCONNECT_B3_CONF reply
*/
static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
_cmsg *cmsg = &iif->acmsg;
struct bc_state *bcs;
int channel;
/* decode message */
capi_message2cmsg(cmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, cmsg);
/* extract and check channel number and NCCI */
channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
if (!channel || channel > cs->channels ||
((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
send_conf(iif, ap, skb, CapiIllContrPlciNcci);
return;
}
bcs = &cs->bcs[channel-1];
/* reject if logical connection not active */
if (bcs->apconnstate < APCONN_ACTIVE) {
send_conf(iif, ap, skb,
CapiMessageNotSupportedInCurrentState);
return;
}
/* trigger hangup, causing eventual DISCONNECT_B3_IND */
if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
return;
}
gigaset_schedule_event(cs);
/* NCPI parameter: not applicable for B3 Transparent */
ignore_cstruct_param(cs, cmsg->NCPI,
"DISCONNECT_B3_REQ", "NCPI");
send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
CapiNcpiNotSupportedByProtocol : CapiSuccess);
}
/*
* process DATA_B3_REQ message
*/
static void do_data_b3_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
struct cardstate *cs = iif->ctr.driverdata;
struct bc_state *bcs;
int channel = CAPIMSG_PLCI_PART(skb->data);
u16 ncci = CAPIMSG_NCCI_PART(skb->data);
u16 msglen = CAPIMSG_LEN(skb->data);
u16 datalen = CAPIMSG_DATALEN(skb->data);
u16 flags = CAPIMSG_FLAGS(skb->data);
u16 msgid = CAPIMSG_MSGID(skb->data);
u16 handle = CAPIMSG_HANDLE_REQ(skb->data);
/* frequent message, avoid _cmsg overhead */
dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
/* check parameters */
if (channel == 0 || channel > cs->channels || ncci != 1) {
dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
"DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
send_conf(iif, ap, skb, CapiIllContrPlciNcci);
return;
}
bcs = &cs->bcs[channel-1];
if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
dev_notice(cs->dev, "%s: unexpected length %d\n",
"DATA_B3_REQ", msglen);
if (msglen + datalen != skb->len)
dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
"DATA_B3_REQ", msglen, datalen, skb->len);
if (msglen + datalen > skb->len) {
/* message too short for announced data length */
send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
return;
}
if (flags & CAPI_FLAGS_RESERVED) {
dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
"DATA_B3_REQ", flags);
send_conf(iif, ap, skb, CapiIllMessageParmCoding);
return;
}
/* reject if logical connection not active */
if (bcs->apconnstate < APCONN_ACTIVE) {
send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
return;
}
/* pull CAPI message into link layer header */
skb_reset_mac_header(skb);
skb->mac_len = msglen;
skb_pull(skb, msglen);
/* pass to device-specific module */
if (cs->ops->send_skb(bcs, skb) < 0) {
send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
return;
}
/*
* DATA_B3_CONF will be sent by gigaset_skb_sent() only if "delivery
* confirmation" bit is set; otherwise we have to send it now
*/
if (!(flags & CAPI_FLAGS_DELIVERY_CONFIRMATION))
send_data_b3_conf(cs, &iif->ctr, ap->id, msgid, channel, handle,
flags ? CapiFlagsNotSupportedByProtocol
: CAPI_NOERROR);
}
/*
* process RESET_B3_REQ message
* just always reply "not supported by current protocol"
*/
static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
/* decode message */
capi_message2cmsg(&iif->acmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
send_conf(iif, ap, skb,
CapiResetProcedureNotSupportedByCurrentProtocol);
}
/*
* dump unsupported/ignored messages at most twice per minute,
* some apps send those very frequently
*/
static unsigned long ignored_msg_dump_time;
/*
* unsupported CAPI message handler
*/
static void do_unsupported(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
/* decode message */
capi_message2cmsg(&iif->acmsg, skb->data);
if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
}
/*
* CAPI message handler: no-op
*/
static void do_nothing(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
/* decode message */
capi_message2cmsg(&iif->acmsg, skb->data);
dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
}
dev_kfree_skb_any(skb);
}
static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
struct gigaset_capi_appl *ap,
struct sk_buff *skb)
{
dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
dev_kfree_skb_any(skb);
}
/* table of outgoing CAPI message handlers with lookup function */
typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
struct gigaset_capi_appl *,
struct sk_buff *);
static struct {
u16 cmd;
capi_send_handler_t handler;
} capi_send_handler_table[] = {
/* most frequent messages first for faster lookup */
{ CAPI_DATA_B3_REQ, do_data_b3_req },
{ CAPI_DATA_B3_RESP, do_data_b3_resp },
{ CAPI_ALERT_REQ, do_alert_req },
{ CAPI_CONNECT_ACTIVE_RESP, do_nothing },
{ CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
{ CAPI_CONNECT_B3_REQ, do_connect_b3_req },
{ CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
{ CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
{ CAPI_CONNECT_REQ, do_connect_req },
{ CAPI_CONNECT_RESP, do_connect_resp },
{ CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
{ CAPI_DISCONNECT_B3_RESP, do_nothing },
{ CAPI_DISCONNECT_REQ, do_disconnect_req },
{ CAPI_DISCONNECT_RESP, do_nothing },
{ CAPI_FACILITY_REQ, do_facility_req },
{ CAPI_FACILITY_RESP, do_nothing },
{ CAPI_LISTEN_REQ, do_listen_req },
{ CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
{ CAPI_RESET_B3_REQ, do_reset_b3_req },
{ CAPI_RESET_B3_RESP, do_nothing },
/*
* ToDo: support overlap sending (requires ev-layer state
* machine extension to generate additional ATD commands)
*/
{ CAPI_INFO_REQ, do_unsupported },
{ CAPI_INFO_RESP, do_nothing },
/*
* ToDo: what's the proper response for these?
*/
{ CAPI_MANUFACTURER_REQ, do_nothing },
{ CAPI_MANUFACTURER_RESP, do_nothing },
};
/* look up handler */
static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
{
size_t i;
for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
if (capi_send_handler_table[i].cmd == cmd)
return capi_send_handler_table[i].handler;
return NULL;
}
/**
* gigaset_send_message() - accept a CAPI message from an application
* @ctr: controller descriptor structure.
* @skb: CAPI message.
*
* Return value: CAPI error code
* Note: capidrv (and probably others, too) only uses the return value to
* decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
*/
static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
{
struct gigaset_capi_ctr *iif
= container_of(ctr, struct gigaset_capi_ctr, ctr);
struct cardstate *cs = ctr->driverdata;
struct gigaset_capi_appl *ap;
capi_send_handler_t handler;
/* can only handle linear sk_buffs */
if (skb_linearize(skb) < 0) {
dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
return CAPI_MSGOSRESOURCEERR;
}
/* retrieve application data structure */
ap = get_appl(iif, CAPIMSG_APPID(skb->data));
if (!ap) {
dev_notice(cs->dev, "%s: application %u not registered\n",
__func__, CAPIMSG_APPID(skb->data));
return CAPI_ILLAPPNR;
}
/* look up command */
handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
if (!handler) {
/* unknown/unsupported message type */
if (printk_ratelimit())
dev_notice(cs->dev, "%s: unsupported message %u\n",
__func__, CAPIMSG_CMD(skb->data));
return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
}
/* serialize */
if (atomic_add_return(1, &iif->sendqlen) > 1) {
/* queue behind other messages */
skb_queue_tail(&iif->sendqueue, skb);
return CAPI_NOERROR;
}
/* process message */
handler(iif, ap, skb);
/* process other messages arrived in the meantime */
while (atomic_sub_return(1, &iif->sendqlen) > 0) {
skb = skb_dequeue(&iif->sendqueue);
if (!skb) {
/* should never happen */
dev_err(cs->dev, "%s: send queue empty\n", __func__);
continue;
}
ap = get_appl(iif, CAPIMSG_APPID(skb->data));
if (!ap) {
/* could that happen? */
dev_warn(cs->dev, "%s: application %u vanished\n",
__func__, CAPIMSG_APPID(skb->data));
continue;
}
handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
if (!handler) {
/* should never happen */
dev_err(cs->dev, "%s: handler %x vanished\n",
__func__, CAPIMSG_CMD(skb->data));
continue;
}
handler(iif, ap, skb);
}
return CAPI_NOERROR;
}
/**
* gigaset_procinfo() - build single line description for controller
* @ctr: controller descriptor structure.
*
* Return value: pointer to generated string (null terminated)
*/
static char *gigaset_procinfo(struct capi_ctr *ctr)
{
return ctr->name; /* ToDo: more? */
}
static int gigaset_proc_show(struct seq_file *m, void *v)
{
struct capi_ctr *ctr = m->private;
struct cardstate *cs = ctr->driverdata;
char *s;
int i;
seq_printf(m, "%-16s %s\n", "name", ctr->name);
seq_printf(m, "%-16s %s %s\n", "dev",
dev_driver_string(cs->dev), dev_name(cs->dev));
seq_printf(m, "%-16s %d\n", "id", cs->myid);
if (cs->gotfwver)
seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
seq_printf(m, "%-16s %d\n", "channels", cs->channels);
seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
switch (cs->mode) {
case M_UNKNOWN:
s = "unknown";
break;
case M_CONFIG:
s = "config";
break;
case M_UNIMODEM:
s = "Unimodem";
break;
case M_CID:
s = "CID";
break;
default:
s = "??";
}
seq_printf(m, "%-16s %s\n", "mode", s);
switch (cs->mstate) {
case MS_UNINITIALIZED:
s = "uninitialized";
break;
case MS_INIT:
s = "init";
break;
case MS_LOCKED:
s = "locked";
break;
case MS_SHUTDOWN:
s = "shutdown";
break;
case MS_RECOVER:
s = "recover";
break;
case MS_READY:
s = "ready";
break;
default:
s = "??";
}
seq_printf(m, "%-16s %s\n", "mstate", s);
seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
for (i = 0; i < cs->channels; i++) {
seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
cs->bcs[i].corrupted);
seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
cs->bcs[i].trans_down);
seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
cs->bcs[i].trans_up);
seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
cs->bcs[i].chstate);
switch (cs->bcs[i].proto2) {
case L2_BITSYNC:
s = "bitsync";
break;
case L2_HDLC:
s = "HDLC";
break;
case L2_VOICE:
s = "voice";
break;
default:
s = "??";
}
seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
}
return 0;
}
static int gigaset_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, gigaset_proc_show, PDE(inode)->data);
}
static const struct file_operations gigaset_proc_fops = {
.owner = THIS_MODULE,
.open = gigaset_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/**
* gigaset_isdn_regdev() - register device to LL
* @cs: device descriptor structure.
* @isdnid: device name.
*
* Return value: 1 for success, 0 for failure
*/
int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
{
struct gigaset_capi_ctr *iif;
int rc;
iif = kmalloc(sizeof(*iif), GFP_KERNEL);
if (!iif) {
pr_err("%s: out of memory\n", __func__);
return 0;
}
/* prepare controller structure */
iif->ctr.owner = THIS_MODULE;
iif->ctr.driverdata = cs;
strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
iif->ctr.driver_name = "gigaset";
iif->ctr.load_firmware = NULL;
iif->ctr.reset_ctr = NULL;
iif->ctr.register_appl = gigaset_register_appl;
iif->ctr.release_appl = gigaset_release_appl;
iif->ctr.send_message = gigaset_send_message;
iif->ctr.procinfo = gigaset_procinfo;
iif->ctr.proc_fops = &gigaset_proc_fops;
INIT_LIST_HEAD(&iif->appls);
skb_queue_head_init(&iif->sendqueue);
atomic_set(&iif->sendqlen, 0);
/* register controller with CAPI */
rc = attach_capi_ctr(&iif->ctr);
if (rc) {
pr_err("attach_capi_ctr failed (%d)\n", rc);
kfree(iif);
return 0;
}
cs->iif = iif;
cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
return 1;
}
/**
* gigaset_isdn_unregdev() - unregister device from LL
* @cs: device descriptor structure.
*/
void gigaset_isdn_unregdev(struct cardstate *cs)
{
struct gigaset_capi_ctr *iif = cs->iif;
detach_capi_ctr(&iif->ctr);
kfree(iif);
cs->iif = NULL;
}
static struct capi_driver capi_driver_gigaset = {
.name = "gigaset",
.revision = "1.0",
};
/**
* gigaset_isdn_regdrv() - register driver to LL
*/
void gigaset_isdn_regdrv(void)
{
pr_info("Kernel CAPI interface\n");
register_capi_driver(&capi_driver_gigaset);
}
/**
* gigaset_isdn_unregdrv() - unregister driver from LL
*/
void gigaset_isdn_unregdrv(void)
{
unregister_capi_driver(&capi_driver_gigaset);
}
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