| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tilman Schmidt | 11864 | 99.06% | 25 | 65.79% |
| Alexey Dobriyan | 54 | 0.45% | 1 | 2.63% |
| Christoph Hellwig | 11 | 0.09% | 2 | 5.26% |
| Joe Perches | 10 | 0.08% | 1 | 2.63% |
| Dan Carpenter | 10 | 0.08% | 1 | 2.63% |
| Kees Cook | 9 | 0.08% | 2 | 5.26% |
| Paul Bolle | 5 | 0.04% | 1 | 2.63% |
| Jesper Juhl | 5 | 0.04% | 1 | 2.63% |
| Andy Shevchenko | 4 | 0.03% | 2 | 5.26% |
| Paul Gortmaker | 3 | 0.03% | 1 | 2.63% |
| Thomas Gleixner | 2 | 0.02% | 1 | 2.63% |
| Total | 11977 | 38 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Kernel CAPI interface for the Gigaset driver * * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>. * * ===================================================================== * ===================================================================== */ #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_array(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_array(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 = 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) { struct cardstate *cs = iif->ctr.driverdata; /* * _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; if (capi_cmsg2message(&iif->acmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } __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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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); break; } 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 */ dev_kfree_skb_any(skb); 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; } if (capi_cmsg2message(cmsg, __skb_put(cskb, msgsize))) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(cskb); return; } 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) { struct cardstate *cs = iif->ctr.driverdata; /* decode message */ if (capi_message2cmsg(&iif->acmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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) { struct cardstate *cs = iif->ctr.driverdata; /* decode message */ if (capi_message2cmsg(&iif->acmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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 = kcalloc(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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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); if (capi_cmsg2message(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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) { /* clear it */ bcs->apconnstate = APCONN_SETUP; /* * 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; } if (capi_cmsg2message(b3cmsg, __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN))) { dev_err(cs->dev, "%s: message parser failure\n", __func__); kfree(b3cmsg); dev_kfree_skb_any(b3skb); return; } dump_cmsg(DEBUG_CMD, __func__, b3cmsg); 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 */ if (capi_message2cmsg(cmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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) { struct cardstate *cs = iif->ctr.driverdata; /* decode message */ if (capi_message2cmsg(&iif->acmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg); send_conf(iif, ap, skb, CapiResetProcedureNotSupportedByCurrentProtocol); } /* * unsupported CAPI message handler */ static void do_unsupported(struct gigaset_capi_ctr *iif, struct gigaset_capi_appl *ap, struct sk_buff *skb) { struct cardstate *cs = iif->ctr.driverdata; /* decode message */ if (capi_message2cmsg(&iif->acmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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) { struct cardstate *cs = iif->ctr.driverdata; /* decode message */ if (capi_message2cmsg(&iif->acmsg, skb->data)) { dev_err(cs->dev, "%s: message parser failure\n", __func__); dev_kfree_skb_any(skb); return; } 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; } /** * gigaset_isdn_regdev() - register device to LL * @cs: device descriptor structure. * @isdnid: device name. * * Return value: 0 on success, error code < 0 on failure */ int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid) { struct gigaset_capi_ctr *iif; int rc; iif = kzalloc(sizeof(*iif), GFP_KERNEL); if (!iif) { pr_err("%s: out of memory\n", __func__); return -ENOMEM; } /* prepare controller structure */ iif->ctr.owner = THIS_MODULE; iif->ctr.driverdata = cs; strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name) - 1); 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_show = gigaset_proc_show, 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 rc; } cs->iif = iif; cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN; return 0; } /** * 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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