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osmo-ccid-firmware/ccid_common/iso7816_fsm.c

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/* ISO 7816-3 Finite State Machine (reader side)
*
* (C) 2019 by Harald Welte <laforge@gnumonks.org>
*
* inspired by earlier work
* (C) 2016-2017 by Harald Welte <hwelte@hmw-consulting.de>
* (C) 2018 by sysmocom -s.f.m.c. GmbH, Author: Kevin Redon <kredon@sysmocom.de>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
*/
#include <string.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/fsm.h>
#include <osmocom/core/logging.h>
#include <osmocom/sim/sim.h>
#include "logging.h"
#include "cuart.h"
#include "iso7816_fsm.h"
/* Section 8.2: the Answer-to-Reset (... a string of at most 32 bytes) */
#define MAX_ATR_SIZE 32
#define S(x) (1 << (x))
/*! ISO 7816-3 states */
enum iso7816_3_state {
ISO7816_S_RESET, /*!< in Reset */
ISO7816_S_WAIT_ATR, /*!< waiting for ATR to start */
ISO7816_S_IN_ATR, /*!< while we are receiving the ATR */
ISO7816_S_WAIT_TPDU, /*!< waiting for start of new TPDU */
ISO7816_S_IN_TPDU, /*!< inside a single TPDU */
ISO7816_S_IN_PPS_REQ, /*!< while we are inside the PPS request */
ISO7816_S_WAIT_PPS_RSP, /*!< waiting for start of the PPS response */
ISO7816_S_IN_PPS_RSP, /*!< while we are inside the PPS request */
};
/*! Answer-To-Reset (ATR) sub-states of ISO7816_S_IN_ATR
* @note defined in ISO/IEC 7816-3:2006(E) section 8
*/
enum atr_state {
ATR_S_WAIT_TS, /*!< initial byte */
ATR_S_WAIT_T0, /*!< format byte */
ATR_S_WAIT_TA, /*!< first sub-group interface byte */
ATR_S_WAIT_TB, /*!< second sub-group interface byte */
ATR_S_WAIT_TC, /*!< third sub-group interface byte */
ATR_S_WAIT_TD, /*!< fourth sub-group interface byte */
ATR_S_WAIT_HIST, /*!< historical byte */
ATR_S_WAIT_TCK, /*!< check byte */
ATR_S_DONE
};
/*! Protocol and Parameters Selection (PPS) sub-states of ISO7816_S_IN_PTS_REQ/ISO7816_S_IN_PTS_RSP
* @note defined in ISO/IEC 7816-3:2006(E) section 9
*/
enum pps_state {
PPS_S_WAIT_PPSS, /*!< initial byte */
PPS_S_WAIT_PPS0, /*!< format byte */
PPS_S_WAIT_PPS1, /*!< first parameter byte */
PPS_S_WAIT_PPS2, /*!< second parameter byte */
PPS_S_WAIT_PPS3, /*!< third parameter byte */
PPS_S_WAIT_PCK, /*!< check byte */
PPS_S_WAIT_END, /*!< all done */
PPS_S_DONE
};
/*! Transport Protocol Data Unit (TPDU) sub-states of ISO7816_S_IN_TPDU
* @note defined in ISO/IEC 7816-3:2006(E) section 10 and 12
* @remark APDUs are formed by one or more command+response TPDUs
*/
enum tpdu_state {
TPDU_S_INIT, /*!< initial state */
TPDU_S_TX_HDR, /*!< transmitting hdr, waiting for completion */
TPDU_S_PROCEDURE, /*!< procedure byte (could also be SW1) */
TPDU_S_TX_REMAINING, /*!< Tx remaining data bytes */
TPDU_S_TX_SINGLE, /*!< Tx single data byte */
TPDU_S_RX_REMAINING, /*!< Rx remaining data bytes */
TPDU_S_RX_SINGLE, /*!< Rx single data byte */
TPDU_S_SW1, /*!< first status word */
TPDU_S_SW2, /*!< second status word */
TPDU_S_DONE,
};
/* FSM timer enumeration */
enum iso7816_3_timer {
T_WAIT_ATR = 1,
T_GUARD,
};
/* forward declarations */
static struct osmo_fsm iso7816_3_fsm;
static struct osmo_fsm atr_fsm;
static struct osmo_fsm tpdu_fsm;
static struct osmo_fsm pps_fsm;
/* look-up table for bit-wise inversion to convert from "inverse convention" to normal */
static const uint8_t convention_convert_lut[256] = {
0xff, 0x7f, 0xbf, 0x3f, 0xdf, 0x5f, 0x9f, 0x1f, 0xef, 0x6f, 0xaf, 0x2f, 0xcf, 0x4f, 0x8f, 0x0f,
0xf7, 0x77, 0xb7, 0x37, 0xd7, 0x57, 0x97, 0x17, 0xe7, 0x67, 0xa7, 0x27, 0xc7, 0x47, 0x87, 0x07,
0xfb, 0x7b, 0xbb, 0x3b, 0xdb, 0x5b, 0x9b, 0x1b, 0xeb, 0x6b, 0xab, 0x2b, 0xcb, 0x4b, 0x8b, 0x0b,
0xf3, 0x73, 0xb3, 0x33, 0xd3, 0x53, 0x93, 0x13, 0xe3, 0x63, 0xa3, 0x23, 0xc3, 0x43, 0x83, 0x03,
0xfd, 0x7d, 0xbd, 0x3d, 0xdd, 0x5d, 0x9d, 0x1d, 0xed, 0x6d, 0xad, 0x2d, 0xcd, 0x4d, 0x8d, 0x0d,
0xf5, 0x75, 0xb5, 0x35, 0xd5, 0x55, 0x95, 0x15, 0xe5, 0x65, 0xa5, 0x25, 0xc5, 0x45, 0x85, 0x05,
0xf9, 0x79, 0xb9, 0x39, 0xd9, 0x59, 0x99, 0x19, 0xe9, 0x69, 0xa9, 0x29, 0xc9, 0x49, 0x89, 0x09,
0xf1, 0x71, 0xb1, 0x31, 0xd1, 0x51, 0x91, 0x11, 0xe1, 0x61, 0xa1, 0x21, 0xc1, 0x41, 0x81, 0x01,
0xfe, 0x7e, 0xbe, 0x3e, 0xde, 0x5e, 0x9e, 0x1e, 0xee, 0x6e, 0xae, 0x2e, 0xce, 0x4e, 0x8e, 0x0e,
0xf6, 0x76, 0xb6, 0x36, 0xd6, 0x56, 0x96, 0x16, 0xe6, 0x66, 0xa6, 0x26, 0xc6, 0x46, 0x86, 0x06,
0xfa, 0x7a, 0xba, 0x3a, 0xda, 0x5a, 0x9a, 0x1a, 0xea, 0x6a, 0xaa, 0x2a, 0xca, 0x4a, 0x8a, 0x0a,
0xf2, 0x72, 0xb2, 0x32, 0xd2, 0x52, 0x92, 0x12, 0xe2, 0x62, 0xa2, 0x22, 0xc2, 0x42, 0x82, 0x02,
0xfc, 0x7c, 0xbc, 0x3c, 0xdc, 0x5c, 0x9c, 0x1c, 0xec, 0x6c, 0xac, 0x2c, 0xcc, 0x4c, 0x8c, 0x0c,
0xf4, 0x74, 0xb4, 0x34, 0xd4, 0x54, 0x94, 0x14, 0xe4, 0x64, 0xa4, 0x24, 0xc4, 0x44, 0x84, 0x04,
0xf8, 0x78, 0xb8, 0x38, 0xd8, 0x58, 0x98, 0x18, 0xe8, 0x68, 0xa8, 0x28, 0xc8, 0x48, 0x88, 0x08,
0xf0, 0x70, 0xb0, 0x30, 0xd0, 0x50, 0x90, 0x10, 0xe0, 0x60, 0xa0, 0x20, 0xc0, 0x40, 0x80, 0x00,
};
/***********************************************************************
* ISO7816-3 Main FSM
***********************************************************************/
static const struct value_string iso7816_3_event_names[] = {
{ ISO7816_E_RX_SINGLE, "UART_RX_SINGLE" },
{ ISO7816_E_RX_COMPL, "UART_RX_COMPL" },
{ ISO7816_E_TX_COMPL, "UART_TX_COMPL" },
{ ISO7816_E_POWER_UP_IND, "POWER_UP_IND" },
{ ISO7816_E_RESET_REL_IND, "RESET_REL_IND" },
{ ISO7816_E_RX_ERR_IND, "RX_ERR_IND" },
{ ISO7816_E_TX_ERR_IND, "TX_ERR_IND" },
{ ISO7816_E_ATR_DONE_IND, "ATR_DONE_IND" },
{ ISO7816_E_TPDU_DONE_IND, "TPDU_DONE_IND" },
{ ISO7816_E_XCEIVE_TPDU_CMD, "XCEIVE_TPDU_CMD" },
/* allstate events */
{ ISO7816_E_WTIME_EXP, "WAIT_TIME_EXP" },
{ ISO7816_E_HW_ERR_IND, "HW_ERR_IND" },
{ ISO7816_E_SW_ERR_IND, "SW_ERR_IND" },
{ ISO7816_E_CARD_REMOVAL, "CARD_REMOVAL" },
{ ISO7816_E_POWER_DN_IND, "POWER_DN_IND" },
{ ISO7816_E_RESET_ACT_IND, "RESET_ACT_IND" },
{ ISO7816_E_ABORT_REQ, "ABORT_REQ" },
{ ISO7816_E_TPDU_CLEAR_REQ, "TPDU_CLEAR_REQ" },
{ 0, NULL }
};
struct iso7816_3_priv {
uint8_t slot_nr;
/* child FSM instances */
struct osmo_fsm_inst *atr_fi;
struct osmo_fsm_inst *pps_fi;
struct osmo_fsm_inst *tpdu_fi;
/* other data */
bool convention_convert;/*!< If convention conversion is needed */
uint16_t guard_time_ms;
/* underlying UART */
struct card_uart *uart;
iso7816_user_cb user_cb;
void *user_priv;
};
/* type-safe method to obtain iso7816_3_priv from fi */
static struct iso7816_3_priv *get_iso7816_3_priv(struct osmo_fsm_inst *fi)
{
OSMO_ASSERT(fi);
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
return (struct iso7816_3_priv *) fi->priv;
}
/* convert from clock cycles of the CLK line to milli-seconds */
uint32_t fi_cycles2ms(struct osmo_fsm_inst *fi, uint32_t cyclces)
{
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
/* FIXME */
return 1000;
}
/* card UART notifies us: dispatch to (main ISO7816-3) FSM */
static void tpdu_uart_notification(struct card_uart *cuart, enum card_uart_event evt, void *data)
{
struct osmo_fsm_inst *fi = (struct osmo_fsm_inst *) cuart->priv;
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
LOGPFSML(fi, LOGL_DEBUG, "UART Notification '%s'\n",
get_value_string(card_uart_event_vals, evt));
/* FIXME: Set only flags here; Main loop polls flags and dispatches events */
switch (evt) {
case CUART_E_RX_SINGLE:
osmo_fsm_inst_dispatch(fi, ISO7816_E_RX_SINGLE, data);
break;
case CUART_E_RX_COMPLETE:
osmo_fsm_inst_dispatch(fi, ISO7816_E_RX_COMPL, data);
break;
case CUART_E_RX_TIMEOUT:
osmo_fsm_inst_dispatch(fi, ISO7816_E_WTIME_EXP, data);
break;
case CUART_E_TX_COMPLETE:
osmo_fsm_inst_dispatch(fi, ISO7816_E_TX_COMPL, data);
break;
}
}
static void iso7816_3_reset_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
/* go back to initial state in child FSMs */
osmo_fsm_inst_state_chg(ip->atr_fi, ATR_S_WAIT_TS, 0, 0);
//osmo_fsm_inst_state_chg(ip->pps_fi, PPS_S_WAIT_PPSS, 0, 0);
osmo_fsm_inst_state_chg(ip->tpdu_fi, TPDU_S_INIT, 0, 0);
}
static void iso7816_3_reset_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
switch (event) {
case ISO7816_E_RESET_REL_IND:
/* TOOD: this should happen before reset is released */
card_uart_ctrl(ip->uart, CUART_CTL_RX, true);
osmo_fsm_inst_state_chg_ms(fi, ISO7816_S_WAIT_ATR,
fi_cycles2ms(fi, 40000), T_WAIT_ATR);
break;
default:
OSMO_ASSERT(0);
}
}
static void iso7816_3_wait_atr_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
switch (event) {
case ISO7816_E_RX_SINGLE:
osmo_fsm_inst_state_chg(fi, ISO7816_S_IN_ATR, 0, 0);
osmo_fsm_inst_dispatch(ip->atr_fi, event, data);
break;
default:
OSMO_ASSERT(0);
}
}
static void iso7816_3_in_atr_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
struct msgb *atr;
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
switch (event) {
case ISO7816_E_RX_SINGLE:
case ISO7816_E_RX_ERR_IND:
/* simply pass this through to the child FSM for the ATR */
osmo_fsm_inst_dispatch(ip->atr_fi, event, data);
break;
case ISO7816_E_ATR_DONE_IND:
atr = data;
/* FIXME: verify ATR result: success / failure */
osmo_fsm_inst_state_chg(fi, ISO7816_S_WAIT_TPDU, 0, 0);
/* notify user about ATR */
ip->user_cb(fi, event, 0, atr);
break;
default:
OSMO_ASSERT(0);
}
}
static void iso7816_3_wait_tpdu_onenter(struct osmo_fsm_inst *fi, uint32_t prev_state)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
/* reset the TPDU state machine */
osmo_fsm_inst_dispatch(ip->tpdu_fi, ISO7816_E_TPDU_CLEAR_REQ, NULL);
}
static void iso7816_3_wait_tpdu_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
switch (event) {
case ISO7816_E_XCEIVE_TPDU_CMD:
/* "data" contains a msgb-wrapped TPDU */
osmo_fsm_inst_state_chg(fi, ISO7816_S_IN_TPDU, 0, 0);
/* pass on to sub-fsm */
osmo_fsm_inst_dispatch(ip->tpdu_fi, event, data);
break;
default:
OSMO_ASSERT(0);
}
}
static void iso7816_3_in_tpdu_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
struct msgb *apdu;
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
switch (event) {
case ISO7816_E_RX_SINGLE:
case ISO7816_E_RX_COMPL:
case ISO7816_E_RX_ERR_IND:
case ISO7816_E_TX_COMPL:
case ISO7816_E_TX_ERR_IND:
/* simply pass this through to the child FSM for the ATR */
osmo_fsm_inst_dispatch(ip->tpdu_fi, event, data);
break;
case ISO7816_E_TPDU_DONE_IND:
apdu = data;
osmo_fsm_inst_state_chg(fi, ISO7816_S_WAIT_TPDU, 0, 0);
/* hand finished TPDU to user */
ip->user_cb(fi, event, 0, apdu);
break;
default:
OSMO_ASSERT(0);
}
}
static void iso7816_3_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
OSMO_ASSERT(fi->fsm == &iso7816_3_fsm);
switch (event) {
case ISO7816_E_WTIME_EXP:
case ISO7816_E_HW_ERR_IND:
case ISO7816_E_CARD_REMOVAL:
/* FIXME: power off? */
osmo_fsm_inst_state_chg(fi, ISO7816_S_RESET, 0, 0);
break;
case ISO7816_E_POWER_DN_IND:
case ISO7816_E_RESET_ACT_IND:
osmo_fsm_inst_state_chg(fi, ISO7816_S_RESET, 0, 0);
break;
case ISO7816_E_ABORT_REQ:
/* FIXME */
break;
default:
OSMO_ASSERT(0);
break;
}
}
static const struct osmo_fsm_state iso7816_3_states[] = {
[ISO7816_S_RESET] = {
.name = "RESET",
.in_event_mask = S(ISO7816_E_RESET_REL_IND),
.out_state_mask = S(ISO7816_S_WAIT_ATR) |
S(ISO7816_S_RESET),
.action = iso7816_3_reset_action,
.onenter = iso7816_3_reset_onenter,
},
[ISO7816_S_WAIT_ATR] = {
.name = "WAIT_ATR",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_IN_ATR),
.action = iso7816_3_wait_atr_action,
},
[ISO7816_S_IN_ATR] = {
.name = "IN_ATR",
.in_event_mask = S(ISO7816_E_RX_SINGLE) |
S(ISO7816_E_RX_ERR_IND) |
S(ISO7816_E_ATR_DONE_IND),
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_IN_ATR) |
S(ISO7816_S_WAIT_TPDU),
.action = iso7816_3_in_atr_action,
},
[ISO7816_S_WAIT_TPDU] = {
.name = "WAIT_TPDU",
.in_event_mask = S(ISO7816_E_XCEIVE_TPDU_CMD),
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_WAIT_TPDU) |
S(ISO7816_S_IN_TPDU) |
S(ISO7816_S_IN_PPS_REQ),
.action = iso7816_3_wait_tpdu_action,
.onenter = iso7816_3_wait_tpdu_onenter,
},
[ISO7816_S_IN_TPDU] = {
.name = "IN_TPDU",
.in_event_mask = S(ISO7816_E_RX_SINGLE) |
S(ISO7816_E_RX_COMPL) |
S(ISO7816_E_TX_COMPL) |
S(ISO7816_E_RX_ERR_IND) |
S(ISO7816_E_TX_ERR_IND) |
S(ISO7816_E_TPDU_DONE_IND),
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_WAIT_TPDU) |
S(ISO7816_S_IN_TPDU),
.action = iso7816_3_in_tpdu_action,
},
[ISO7816_S_IN_PPS_REQ] = {
.name = "IN_PPS_REQ",
.in_event_mask = 0, /* FIXME */
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_WAIT_TPDU) |
S(ISO7816_S_IN_PPS_REQ) |
S(ISO7816_S_WAIT_PPS_RSP),
},
[ISO7816_S_WAIT_PPS_RSP] = {
.name = "WAIT_PPS_RESP",
.in_event_mask = 0, /* FIXME */
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_WAIT_TPDU) |
S(ISO7816_S_WAIT_PPS_RSP) |
S(ISO7816_S_IN_PPS_RSP),
},
[ISO7816_S_IN_PPS_RSP] = {
.name = "IN_PPS_RESP",
.in_event_mask = 0, /* FIXME */
.out_state_mask = S(ISO7816_S_RESET) |
S(ISO7816_S_WAIT_TPDU) |
S(ISO7816_S_IN_PPS_RSP),
},
};
static struct osmo_fsm iso7816_3_fsm = {
.name = "ISO7816-3",
.states = iso7816_3_states,
.num_states = ARRAY_SIZE(iso7816_3_states),
.log_subsys = DISO7816,
.event_names = iso7816_3_event_names,
.allstate_action = iso7816_3_allstate_action,
.allstate_event_mask = S(ISO7816_E_WTIME_EXP) |
S(ISO7816_E_CARD_REMOVAL) |
S(ISO7816_E_POWER_DN_IND) |
S(ISO7816_E_RESET_ACT_IND) |
S(ISO7816_E_HW_ERR_IND) |
S(ISO7816_E_ABORT_REQ),
};
/***********************************************************************
* ATR FSM
***********************************************************************/
struct atr_fsm_priv {
uint8_t hist_len; /*!< store the number of expected historical bytes */
uint8_t y; /*!< last mask of the upcoming TA, TB, TC, TD interface bytes */
uint8_t i; /*!< interface byte subgroup number */
struct msgb *atr; /*!< ATR data */
uint8_t computed_checksum;
uint16_t protocol_support;
};
/* obtain the [software] guard time in milli-seconds from the atr fsm_inst */
static uint32_t atr_fi_gt_ms(struct osmo_fsm_inst *fi)
{
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip;
OSMO_ASSERT(fi->fsm == &atr_fsm);
OSMO_ASSERT(parent_fi);
ip = get_iso7816_3_priv(parent_fi);
return ip->guard_time_ms;
}
/* obtain the 'byte' parmeter of an ISO7816_E_RX event */
static uint8_t get_rx_byte_evt(struct osmo_fsm_inst *fi, void *data)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
uint8_t byte = *(uint8_t *)data;
/* apply inverse convention */
if (ip->convention_convert)
byte = convention_convert_lut[byte];
return byte;
}
/* append a single byte to the ATR */
static int atr_append_byte(struct osmo_fsm_inst *fi, uint8_t byte)
{
struct atr_fsm_priv *atp = fi->priv;
if (!msgb_tailroom(atp->atr)) {
LOGPFSML(fi, LOGL_ERROR, "ATR overflow !?!");
osmo_fsm_inst_dispatch(fi->proc.parent, ISO7816_E_SW_ERR_IND, NULL);
return -1;
}
msgb_put_u8(atp->atr, byte);
return 0;
}
static void atr_wait_ts_onenter(struct osmo_fsm_inst *fi, uint32_t old_state)
{
struct atr_fsm_priv *atp = fi->priv;
/* reset state to its initial value */
atp->hist_len = 0;
atp->y = 0;
atp->i = 0;
if (!atp->atr)
atp->atr = msgb_alloc_c(fi, 33, "ATR"); /* TS + 32 chars */
else
msgb_reset(atp->atr);
atp->computed_checksum = 0;
atp->protocol_support = 0;
}
static void atr_wait_ts_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct atr_fsm_priv *atp = fi->priv;
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
uint8_t byte;
switch (event) {
case ISO7816_E_RX_SINGLE:
OSMO_ASSERT(msgb_length(atp->atr) == 0);
restart:
byte = get_rx_byte_evt(parent_fi, data);
LOGPFSML(fi, LOGL_DEBUG, "RX byte '%02x'\n", byte);
switch (byte) {
case 0x23:
/* direct convention used, but decoded using inverse
* convention (a parity error should also have occurred) */
/* fall-through */
case 0x30:
/* inverse convention used, but decoded using direct
* convention (a parity error should also have occurred) */
ip->convention_convert = !ip->convention_convert;
goto restart;
break;
case 0x3b: /* direct convention used and correctly decoded */
/* fall-through */
case 0x3f: /* inverse convention used and correctly decoded */
atr_append_byte(fi, byte);
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_T0, atr_fi_gt_ms(fi), T_GUARD);
break;
default:
LOGPFSML(fi, LOGL_ERROR, "Invalid TS received: 0x%02X\n", byte);
/* FIXME: somehow indiicate to user */
osmo_fsm_inst_dispatch(fi->proc.parent, ISO7816_E_SW_ERR_IND, NULL);
break;
}
atp->i = 0; /* first interface byte sub-group is coming (T0 is kind of TD0) */
break;
default:
OSMO_ASSERT(0);
}
}
static void atr_wait_tX_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct atr_fsm_priv *atp = fi->priv;
uint32_t guard_time_ms = atr_fi_gt_ms(fi);
uint8_t byte;
switch (event) {
case ISO7816_E_RX_SINGLE:
byte = get_rx_byte_evt(fi->proc.parent, data);
LOGPFSML(fi, LOGL_DEBUG, "RX byte '%02x'\n", byte);
atr_append_byte(fi, byte);
switch (fi->state) {
case ATR_S_WAIT_T0: /* see ISO/IEC 7816-3:2006 section 8.2.2 */
case ATR_S_WAIT_TD: /* see ISO/IEC 7816-3:2006 section 8.2.3 */
if (fi->state == ATR_S_WAIT_T0) {
/* save number of hist. bytes */
atp->hist_len = (byte & 0x0f);
} else {
/* remember supported protocol to know if TCK will be present */
atp->protocol_support |= (1<<(byte & 0x0f));
}
atp->y = (byte & 0xf0); /* remember incoming interface bytes */
atp->i++;
if (atp->y & 0x10) {
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_TA, guard_time_ms, T_GUARD);
break;
}
/* fall-through */
case ATR_S_WAIT_TA: /* see ISO/IEC 7816-3:2006 section 8.2.3 */
if (atp->y & 0x20) {
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_TB, guard_time_ms, T_GUARD);
break;
}
/* fall-through */
case ATR_S_WAIT_TB: /* see ISO/IEC 7816-3:2006 section 8.2.3 */
if (atp->y & 0x40) {
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_TC, guard_time_ms, T_GUARD);
break;
}
/* fall-through */
case ATR_S_WAIT_TC: /* see ISO/IEC 7816-3:2006 section 8.2.3 */
if (atp->y & 0x80) {
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_TD, guard_time_ms, T_GUARD);
break;
} else if (atp->hist_len) {
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_HIST, guard_time_ms, T_GUARD);
break;
}
/* fall-through */
case ATR_S_WAIT_HIST: /* see ISO/IEC 7816-3:2006 section 8.2.4 */
if (atp->hist_len)
atp->hist_len--;
if (atp->hist_len == 0) {
if (atp->protocol_support > 1) {
/* wait for check byte */
osmo_fsm_inst_state_chg_ms(fi, ATR_S_WAIT_TCK,
guard_time_ms, T_GUARD);
break;
}
} else {
break;
}
/* fall-through */
case ATR_S_WAIT_TCK: /* see ISO/IEC 7816-3:2006 section 8.2.5 */
/* verify checksum if present */
if (fi->state == ATR_S_WAIT_TCK) {
uint8_t ui;
uint8_t *atr = msgb_data(atp->atr);
LOGPFSML(fi, LOGL_INFO, "Complete ATR: %s\n", msgb_hexdump(atp->atr));
for (ui = 1; ui < msgb_length(atp->atr)-1; ui++) {
atp->computed_checksum ^= atr[ui];
}
if (atp->computed_checksum != byte) {
/* checkum error. report to user? */
LOGPFSML(fi, LOGL_ERROR,
"computed checksum %02x doesn't match TCK=%02x\n",
atp->computed_checksum, byte);
}
/* ATR complete; notify parent */
osmo_fsm_inst_state_chg(fi, ATR_S_DONE, 0, 0);
osmo_fsm_inst_dispatch(fi->proc.parent, ISO7816_E_ATR_DONE_IND, atp->atr);
}
break;
default:
OSMO_ASSERT(0);
}
break;
default:
OSMO_ASSERT(0);
}
}
static const struct osmo_fsm_state atr_states[] = {
[ATR_S_WAIT_TS] = {
.name = "WAIT_TS",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TS) |
S(ATR_S_WAIT_T0),
.action = atr_wait_ts_action,
.onenter = atr_wait_ts_onenter,
},
[ATR_S_WAIT_T0] = {
.name = "WAIT_T0",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TA) |
S(ATR_S_WAIT_TB) |
S(ATR_S_WAIT_TC) |
S(ATR_S_WAIT_TD) |
S(ATR_S_WAIT_HIST) |
S(ATR_S_WAIT_TCK) |
S(ATR_S_WAIT_T0),
.action = atr_wait_tX_action,
},
[ATR_S_WAIT_TA] = {
.name = "WAIT_TA",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TB) |
S(ATR_S_WAIT_TC) |
S(ATR_S_WAIT_TD) |
S(ATR_S_WAIT_HIST) |
S(ATR_S_WAIT_TCK) |
S(ATR_S_WAIT_T0),
.action = atr_wait_tX_action,
},
[ATR_S_WAIT_TB] = {
.name = "WAIT_TB",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TC) |
S(ATR_S_WAIT_TD) |
S(ATR_S_WAIT_HIST) |
S(ATR_S_WAIT_TCK) |
S(ATR_S_WAIT_T0),
.action = atr_wait_tX_action,
},
[ATR_S_WAIT_TC] = {
.name = "WAIT_TC",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TD) |
S(ATR_S_WAIT_HIST) |
S(ATR_S_WAIT_TCK) |
S(ATR_S_WAIT_T0),
.action = atr_wait_tX_action,
},
[ATR_S_WAIT_TD] = {
.name = "WAIT_TD",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TA) |
S(ATR_S_WAIT_TB) |
S(ATR_S_WAIT_TC) |
S(ATR_S_WAIT_TD) |
S(ATR_S_WAIT_HIST) |
S(ATR_S_WAIT_TCK) |
S(ATR_S_WAIT_T0),
.action = atr_wait_tX_action,
},
[ATR_S_WAIT_HIST] = {
.name = "WAIT_HIST",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_WAIT_TCK) |
S(ATR_S_WAIT_T0),
.action = atr_wait_tX_action,
},
[ATR_S_WAIT_TCK] = {
.name = "WAIT_TCK",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(ATR_S_DONE),
.action = atr_wait_tX_action,
},
[ATR_S_DONE] = {
.name = "DONE",
.in_event_mask = 0,
.out_state_mask = S(ATR_S_WAIT_T0),
//.action = atr_done_action,
},
};
static struct osmo_fsm atr_fsm = {
.name = "ATR",
.states = atr_states,
.num_states = ARRAY_SIZE(atr_states),
.log_subsys = DATR,
.event_names = iso7816_3_event_names,
};
/***********************************************************************
* PPS FSM
***********************************************************************/
static const struct osmo_fsm_state pps_states[] = {
[PPS_S_WAIT_PPSS] = {
.name = "WAIT_PPSS",
},
[PPS_S_WAIT_PPS0] = {
.name = "WAIT_PPS0",
},
[PPS_S_WAIT_PPS1] = {
.name = "WAIT_PPS1",
},
[PPS_S_WAIT_PPS2] = {
.name = "WAIT_PPS2",
},
[PPS_S_WAIT_PPS3] = {
.name = "WAIT_PPS3",
},
[PPS_S_WAIT_PCK] = {
.name = "WAIT_PCK",
},
[PPS_S_WAIT_END] = {
.name = "WAIT_END",
},
};
static struct osmo_fsm pps_fsm = {
.name = "PPS",
.states = pps_states,
.num_states = ARRAY_SIZE(pps_states),
.log_subsys = DPPS,
.event_names = iso7816_3_event_names,
};
/***********************************************************************
* TPDU FSM
***********************************************************************/
struct tpdu_fsm_priv {
struct msgb *tpdu;
};
/* type-safe method to obtain iso7816_3_priv from fi */
static struct tpdu_fsm_priv *get_tpdu_fsm_priv(struct osmo_fsm_inst *fi)
{
OSMO_ASSERT(fi);
OSMO_ASSERT(fi->fsm == &tpdu_fsm);
return (struct tpdu_fsm_priv *) fi->priv;
}
static void tpdu_s_init_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tpdu_fsm_priv *tfp = get_tpdu_fsm_priv(fi);
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
struct osim_apdu_cmd_hdr *tpduh;
switch (event) {
case ISO7816_E_XCEIVE_TPDU_CMD:
/* start transmission of a TPDU by sending the 5-byte header */
tfp->tpdu = (struct msgb *)data;
OSMO_ASSERT(msgb_length(tfp->tpdu) >= sizeof(*tpduh));
tfp->tpdu->l2h = msgb_data(tfp->tpdu) + sizeof(*tpduh);
tpduh = msgb_data(tfp->tpdu);
LOGPFSML(fi, LOGL_DEBUG, "Transmitting TPDU header %s via UART\n",
osmo_hexdump_nospc((uint8_t *) tpduh, sizeof(*tpduh)));
osmo_fsm_inst_state_chg(fi, TPDU_S_TX_HDR, 0, 0);
card_uart_tx(ip->uart, (uint8_t *) tpduh, sizeof(*tpduh), true);
break;
default:
OSMO_ASSERT(0);
}
}
static void tpdu_s_tx_hdr_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
OSMO_ASSERT(fi->fsm == &tpdu_fsm);
switch (event) {
case ISO7816_E_TX_COMPL:
/* Rx of single byte is already enabled by previous card_uart_tx() call */
osmo_fsm_inst_state_chg(fi, TPDU_S_PROCEDURE, 0, 0);
break;
default:
OSMO_ASSERT(0);
}
}
static void tpdu_s_procedure_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tpdu_fsm_priv *tfp = get_tpdu_fsm_priv(fi);
struct osim_apdu_cmd_hdr *tpduh = msgb_data(tfp->tpdu);
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
uint8_t byte;
switch (event) {
case ISO7816_E_RX_SINGLE:
byte = get_rx_byte_evt(fi->proc.parent, data);
LOGPFSML(fi, LOGL_DEBUG, "Received 0x%02x from UART\n", byte);
if (byte == 0x60) {
/* NULL: wait for another procedure byte */
osmo_fsm_inst_state_chg(fi, TPDU_S_PROCEDURE, 0, 0);
} else if ((byte >= 0x60 && byte <= 0x6f) || (byte >= 0x90 && byte <= 0x9f)) {
//msgb_apdu_sw(tfp->apdu) = byte << 8;
msgb_put(tfp->tpdu, byte);
/* receive second SW byte (SW2) */
osmo_fsm_inst_state_chg(fi, TPDU_S_SW2, 0, 0);
break;
} else if (byte == tpduh->ins) {
if (msgb_l2len(tfp->tpdu)) {
/* transmit all remaining bytes */
card_uart_tx(ip->uart, msgb_l2(tfp->tpdu), msgb_l2len(tfp->tpdu), true);
osmo_fsm_inst_state_chg(fi, TPDU_S_TX_REMAINING, 0, 0);
} else {
card_uart_set_rx_threshold(ip->uart, tpduh->p3);
osmo_fsm_inst_state_chg(fi, TPDU_S_RX_REMAINING, 0, 0);
}
} else if (byte == (tpduh->ins ^ 0xFF)) {
osmo_panic("unsupported single-byte T=0 case");
/* FIXME: transmit single byte then wait for proc */
//osmo_fsm_inst_state_chg(fi, TPDU_S_xX_SINGLE, 0, 0);
//osmo_fsm_inst_state_chg(fi, TPDU_S_PROCEDURE, 0, 0);
} else
OSMO_ASSERT(0);
break;
default:
OSMO_ASSERT(0);
}
}
/* UART is transmitting remaining data; we wait for ISO7816_E_TX_COMPL */
static void tpdu_s_tx_remaining_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
switch (event) {
case ISO7816_E_TX_COMPL:
card_uart_set_rx_threshold(ip->uart, 1);
osmo_fsm_inst_state_chg(fi, TPDU_S_SW1, 0, 0);
break;
default:
OSMO_ASSERT(0);
}
}
/* UART is transmitting single byte of data; we wait for ISO7816_E_TX_COMPL */
static void tpdu_s_tx_single_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
switch (event) {
case ISO7816_E_TX_COMPL:
/* TODO: increase pointer/counter? */
osmo_fsm_inst_state_chg(fi, TPDU_S_PROCEDURE, 0, 0);
break;
default:
OSMO_ASSERT(0);
}
}
/* UART is receiving remaining data; we wait for ISO7816_E_RX_COMPL */
static void tpdu_s_rx_remaining_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tpdu_fsm_priv *tfp = get_tpdu_fsm_priv(fi);
struct osim_apdu_cmd_hdr *tpduh = msgb_data(tfp->tpdu);
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
int rc;
switch (event) {
case ISO7816_E_RX_COMPL:
/* retrieve pending byte(s) */
rc = card_uart_rx(ip->uart, msgb_l2(tfp->tpdu), tpduh->p3);
if (rc != tpduh->p3)
LOGPFSML(fi, LOGL_ERROR, "expected %u bytes; read %d\n", tpduh->p3, rc);
card_uart_set_rx_threshold(ip->uart, 1);
osmo_fsm_inst_state_chg(fi, TPDU_S_SW1, 0, 0);
break;
default:
OSMO_ASSERT(0);
}
}
/* UART is receiving single byte of data; we wait for ISO7816_E_RX_SINGLE */
static void tpdu_s_rx_single_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tpdu_fsm_priv *tfp = get_tpdu_fsm_priv(fi);
uint8_t byte;
switch (event) {
case ISO7816_E_RX_SINGLE:
byte = get_rx_byte_evt(fi->proc.parent, data);
LOGPFSML(fi, LOGL_DEBUG, "Received 0x%02x from UART\n", byte);
/* TODO: record byte */
/* FIXME: determine if number of expected bytes received */
if (0) {
osmo_fsm_inst_state_chg(fi, TPDU_S_SW1, 0, 0);
} else
osmo_fsm_inst_state_chg(fi, TPDU_S_PROCEDURE, 0, 0);
break;
default:
OSMO_ASSERT(0);
}
}
static void tpdu_s_sw1_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tpdu_fsm_priv *tfp = get_tpdu_fsm_priv(fi);
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
uint8_t byte;
switch (event) {
case ISO7816_E_RX_SINGLE:
byte = get_rx_byte_evt(fi->proc.parent, data);
LOGPFSML(fi, LOGL_DEBUG, "Received 0x%02x from UART\n", byte);
/* record byte */
//msgb_apdu_sw(tfp->apdu) = byte << 8;
msgb_put_u8(tfp->tpdu, byte);
card_uart_set_rx_threshold(ip->uart, 1);
osmo_fsm_inst_state_chg(fi, TPDU_S_SW2, 0, 0);
break;
default:
OSMO_ASSERT(0);
}
}
static void tpdu_s_sw2_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
struct tpdu_fsm_priv *tfp = get_tpdu_fsm_priv(fi);
struct osmo_fsm_inst *parent_fi = fi->proc.parent;
struct iso7816_3_priv *ip = get_iso7816_3_priv(parent_fi);
uint8_t byte;
switch (event) {
case ISO7816_E_RX_SINGLE:
byte = get_rx_byte_evt(fi->proc.parent, data);
LOGPFSML(fi, LOGL_DEBUG, "Received 0x%02x from UART\n", byte);
/* record SW2 byte */
//msgb_apdu_sw(tfp->apdu) &= 0xFF00;
//msgb_apdu_sw(tfp->apdu) |= byte;
msgb_put_u8(tfp->tpdu, byte);
osmo_fsm_inst_state_chg(fi, TPDU_S_DONE, 0, 0);
/* Notify parent FSM */
osmo_fsm_inst_dispatch(fi->proc.parent, ISO7816_E_TPDU_DONE_IND, tfp->tpdu);
break;
default:
OSMO_ASSERT(0);
}
}
static void tpdu_allstate_action(struct osmo_fsm_inst *fi, uint32_t event, void *data)
{
OSMO_ASSERT(fi->fsm == &tpdu_fsm);
switch (event) {
case ISO7816_E_RX_ERR_IND:
case ISO7816_E_TX_ERR_IND:
/* FIXME: handle this in some different way */
osmo_fsm_inst_state_chg(fi, TPDU_S_DONE, 0, 0);
osmo_fsm_inst_dispatch(fi->proc.parent, ISO7816_E_TPDU_DONE_IND, NULL);
break;
case ISO7816_E_TPDU_CLEAR_REQ:
osmo_fsm_inst_state_chg(fi, TPDU_S_INIT, 0, 0);
break;
}
}
static const struct osmo_fsm_state tpdu_states[] = {
[TPDU_S_INIT] = {
.name = "INIT",
.in_event_mask = S(ISO7816_E_XCEIVE_TPDU_CMD) |
S(ISO7816_E_TX_COMPL),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_TX_HDR),
.action = tpdu_s_init_action,
},
[TPDU_S_TX_HDR] = {
.name = "TX_HDR",
.in_event_mask = S(ISO7816_E_TX_COMPL),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_PROCEDURE),
.action = tpdu_s_tx_hdr_action,
},
[TPDU_S_PROCEDURE] = {
.name = "PROCEDURE",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_PROCEDURE) |
S(TPDU_S_RX_REMAINING) |
S(TPDU_S_RX_SINGLE) |
S(TPDU_S_TX_REMAINING) |
S(TPDU_S_TX_SINGLE) |
S(TPDU_S_SW2),
.action = tpdu_s_procedure_action,
},
[TPDU_S_TX_REMAINING] = {
.name = "TX_REMAINING",
.in_event_mask = S(ISO7816_E_TX_COMPL),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_SW1),
.action = tpdu_s_tx_remaining_action,
},
[TPDU_S_TX_SINGLE] = {
.name = "TX_SINGLE",
.in_event_mask = S(ISO7816_E_TX_COMPL),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_PROCEDURE),
.action = tpdu_s_tx_single_action,
},
[TPDU_S_RX_REMAINING] = {
.name = "RX_REMAINING",
.in_event_mask = S(ISO7816_E_RX_COMPL),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_SW1),
.action = tpdu_s_rx_remaining_action,
},
[TPDU_S_RX_SINGLE] = {
.name = "RX_SINGLE",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_PROCEDURE),
.action = tpdu_s_rx_single_action,
},
[TPDU_S_SW1] = {
.name = "SW1",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_SW2),
.action = tpdu_s_sw1_action,
},
[TPDU_S_SW2] = {
.name = "SW2",
.in_event_mask = S(ISO7816_E_RX_SINGLE),
.out_state_mask = S(TPDU_S_INIT) |
S(TPDU_S_DONE),
.action = tpdu_s_sw2_action,
},
[TPDU_S_DONE] = {
.name = "DONE",
.in_event_mask = 0,
.out_state_mask = S(TPDU_S_INIT),
.action = NULL,
},
};
static struct osmo_fsm tpdu_fsm = {
.name = "TPDU",
.states = tpdu_states,
.num_states = ARRAY_SIZE(tpdu_states),
.allstate_event_mask = S(ISO7816_E_RX_ERR_IND) |
S(ISO7816_E_TX_ERR_IND) |
S(ISO7816_E_TPDU_CLEAR_REQ),
.allstate_action = tpdu_allstate_action,
.log_subsys = DTPDU,
.event_names = iso7816_3_event_names,
};
struct osmo_fsm_inst *iso7816_fsm_alloc(void *ctx, int log_level, const char *id,
struct card_uart *cuart, iso7816_user_cb user_cb,
void *user_priv)
{
struct iso7816_3_priv *ip;
struct osmo_fsm_inst *fi;
fi = osmo_fsm_inst_alloc(&iso7816_3_fsm, ctx, NULL, log_level, id);
ip = talloc_zero(fi, struct iso7816_3_priv);
if (!ip)
goto out_fi;
fi->priv = ip;
ip->uart = cuart;
cuart->priv = fi;
cuart->handle_event = tpdu_uart_notification;
ip->user_cb = user_cb;
ip->user_priv = user_priv;
ip->atr_fi = osmo_fsm_inst_alloc_child(&atr_fsm, fi, ISO7816_E_SW_ERR_IND);
if (!ip->atr_fi)
goto out_fi;
ip->atr_fi->priv = talloc_zero(ip->atr_fi, struct atr_fsm_priv);
if (!ip->atr_fi->priv)
goto out_atr;
ip->tpdu_fi = osmo_fsm_inst_alloc_child(&tpdu_fsm, fi, ISO7816_E_SW_ERR_IND);
if (!ip->tpdu_fi)
goto out_atr;
ip->tpdu_fi->priv = talloc_zero(ip->tpdu_fi, struct tpdu_fsm_priv);
if (!ip->tpdu_fi->priv)
goto out_tpdu;
#if 0
ip->pps_fi = osmo_fsm_inst_alloc_child(&pps_fsm, fi, ISO7816_E_SW_ERR_IND);
if (!ip->pps_fi)
goto out_tpdu;
ip->pps_fi->priv = talloc_zero(ip->pps_fi, struct pps_fsm_priv);
if (!ip->pps_fi->priv)
goto out_pps;
#endif
/* This ensures the 'onenter' function of the initial state is called */
osmo_fsm_inst_state_chg(fi, ISO7816_S_RESET, 0, 0);
return fi;
#if 0
out_pps:
osmo_fsm_inst_free(ip->pps_fi);
#endif
out_tpdu:
osmo_fsm_inst_free(ip->tpdu_fi);
out_atr:
osmo_fsm_inst_free(ip->atr_fi);
out_fi:
osmo_fsm_inst_free(fi);
cuart->priv = NULL;
return NULL;
}
void *iso7816_fsm_get_user_priv(struct osmo_fsm_inst *fi)
{
struct iso7816_3_priv *ip = get_iso7816_3_priv(fi);
return ip->user_priv;
}
static __attribute__((constructor)) void on_dso_load_iso7816(void)
{
osmo_fsm_register(&iso7816_3_fsm);
osmo_fsm_register(&atr_fsm);
osmo_fsm_register(&tpdu_fsm);
osmo_fsm_register(&pps_fsm);
}
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