Explore returned partial data (no ELF/module entries, the installed package
missing) and then failed with cntr_low. Two causes, both in the
actual-response SMS-SUBMIT path the card uses for big listings:
- `_find_sms_tpdu` read TLV lengths as a single byte; the FETCH carries
`8B 81 97 ...` (BER long form) for the big pages, so it returned a
corrupted, truncated TPDU.
- `_calc_ud_offset` treated the SMS-SUBMIT relative validity period (VPF=10)
as 7 bytes instead of 1, shifting the UD offset: `_parse_sms_concat` then
read a bogus UDH and reported no concatenation, so the segments never
assembled and the PoR/data was dropped ("RAM RESPONSE-PACKET: empty").
The step was marked failed, the counter did not advance, the same counter
was retried and the card answered `cntr_low`, which also blocked P1=10
(modules) where the installed package appears.
- the captured segments now always store the assembled UD (`submit_ud_hex`);
`_sms_submit_por()` rebuilds the DELIVER-style packet (`02 71 00` + UD) for
`_decode_por`. Verified against the live capture: por_ok, remote SW 6310,
438 hex chars of listing data (the exact bytes of the P1=20 page).
- `spPorAccepted` counts `actual_response_sms_submit` (0x0B) as accepted, so
the counter advances when the data follows via SMS-SUBMIT.
Explore queries follow GP Card Spec v2.3.1 11.4.2.2: compact listings
(P2.b2=0) with the chained GET RESPONSE (`ramGetStatusApdu`, paging P2=00 ->
P2=01), the malformed P2=02 attempt is gone, and the ISD-only query (P1=80)
never pages with next-occurrence (the card shall reject it).
Tests: Python SmsSubmitCaptureTest with the live FETCH bytes (TPDU length,
UD offset, concat reassembly, 027100+UD decode); ram.test.js checks the APDU
builder and the missing P2=02 attempt; cards_counter covers 0x0B.
608 frontend / 492 Python green; version 3.6.4; sw simple-v277.
The SCP80/RAM forms hold a copy of the preset (counter, keys, TAR, SPI).
Editing the preset on the Cards tab saved correctly, but the form kept the
old copy: the operation sent the stale counter (the card answers cntr_low)
and the post-send sync wrote the stale value back over the preset - the
saved counter silently reverted. Reproduced in a real DOM:
after select in SCP80: preset=0000000001 sp=0000000001
after Cards edit+save: preset=00000000AA sp=0000000001
after a sync: preset=0000000001 (edit lost)
- `cardsApply()` split into `cardsApplyFields()` (field copy, no packet) and
`cardsApply()` = fields + genSp; new `spRefreshFromPreset(selId)` re-reads
the selected preset from `sp-card-sel` / `ram-card-sel` and re-applies it.
- `pysimSendOta()` and `ramExecute()` call it before starting, so every
SCP80/RAM operation uses the preset as it is now.
- A rejected send no longer advances the counter: new `spPorAccepted(por)`
gates the advance+write-back in `pysimSendOta`, the Explore pagination and
its GET DATA step, and the server's RAM install (`_ram_next_cntr`: advance
only for `por_ok`/`no_por` steps). A failed install still returns
`final_cntr` (the accepted prefix) and the PWA persists it, so a retry
never replays a counter the card already consumed.
- tests: cards_counter.test.js (the stale-form regression, RAM selector,
fields-without-genSp, spPorAccepted) and `_ram_next_cntr` cases; the
cards_form/ram harnesses updated for the split.
- docs/api.md counter semantics; AGENTS preset-source-of-truth rule.
607 frontend / 488 Python green; version 3.6.3; sw simple-v276.
catarrh