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[lib] apdu_dispatch: Don't print APDU state to stdout

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The printing was always only done at the end of osmo_apdu_segment_in(),
so let's leave the decision up to the user if he wants to print the
state at every iteration or not.

We now provide osmo_apdu_dump_context_buf() to the user so he can obtain
a string representation of the internal state for logging at any time he
requires.

Change-Id: Id3e3cf1605dec84077b158c1c5715f8eef2641d5
This commit is contained in:
Harald Welte
2019-12-16 15:11:00 +01:00
committed by laforge
parent e9556efe88
commit 563601cff2
2 changed files with 16 additions and 9 deletions
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4
host/include/osmocom/simtrace2/apdu_dispatch.h
View File

@@ -1,6 +1,6 @@
/* apdu_dispatch - State machine to determine Rx/Tx phases of APDU
*
* (C) 2016 by Harald Welte <hwelte@hmw-consulting.de>
* (C) 2016-2019 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -44,6 +44,8 @@ enum osmo_apdu_action {
APDU_ACT_RX_MORE_CAPDU_FROM_READER = 0x0002,
};
const char *osmo_apdu_dump_context_buf(char *buf, unsigned int buf_len,
const struct osmo_apdu_context *ac);
int osmo_apdu_segment_in(struct osmo_apdu_context *ac, const uint8_t *apdu_buf,
unsigned int apdu_len, bool new_apdu);

21
host/lib/apdu_dispatch.c
View File

@@ -42,7 +42,7 @@ static inline bool is_de_complete(struct osmo_apdu_context *ac)
return (ac->le.tot == ac->le.cur);
}
static const char *dump_apdu_hdr(const struct osim_apdu_cmd_hdr *h)
static const char *stringify_apdu_hdr(const struct osim_apdu_cmd_hdr *h)
{
static char buf[256];
sprintf(buf, "CLA=%02x INS=%02x P1=%02x P2=%02x P3=%02x",
@@ -51,12 +51,19 @@ static const char *dump_apdu_hdr(const struct osim_apdu_cmd_hdr *h)
return buf;
}
static void dump_apdu_ctx(const struct osmo_apdu_context *ac)
/*! generate string representation of APDU context in specified output buffer.
* \param[in] buf output string buffer provided by caller
* \param[in] buf_len size of buf in bytes
* \param[in] ac APDU context to dump in buffer
* \returns pointer to buf on success */
const char *osmo_apdu_dump_context_buf(char *buf, unsigned int buf_len,
const struct osmo_apdu_context *ac)
{
printf("%s; case=%d, lc=%d(%d), le=%d(%d)\n",
dump_apdu_hdr(&ac->hdr), ac->apdu_case,
ac->lc.tot, ac->lc.cur,
ac->le.tot, ac->le.cur);
snprintf(buf, buf_len, "%s; case=%d, lc=%d(%d), le=%d(%d)\n",
stringify_apdu_hdr(&ac->hdr), ac->apdu_case,
ac->lc.tot, ac->lc.cur,
ac->le.tot, ac->le.cur);
return buf;
}
/*! \brief input function for APDU segmentation
@@ -168,7 +175,5 @@ int osmo_apdu_segment_in(struct osmo_apdu_context *ac, const uint8_t *apdu_buf,
return -1;
}
dump_apdu_ctx(ac);
return rc;
}