The main loop cleared the whole PacketCommandNG payload before every call to
receive_ng(), so a device sitting idle memset PM3_CMD_DATA_SIZE bytes on each
pass of the loop whether anything was arriving or not. The zeroing belongs
inside receive_ng_internal(), once the preamble has been read and a packet is
known to be coming in, and that is where it is now.
It has to be before either branch fills the payload, because neither fills all
of it: an NG command writes only its own length, and an old style one only
PM3_CMD_DATA_SIZE_OLD. Whatever is not written has to start at zero.
Moving it also covers two callers that never had it. appmain.c has a second
receive_ng() that drains the buffer on a mode switch, and iclass.c has one that
picks up EML_MEMSET commands while waiting for RF. Both declare their
PacketCommandNG without initialising it, and the iclass one then reads a struct
out of the payload -- so a command shorter than that struct was reading stack
garbage beyond its length. That is fixed as a side effect.
Builds for RDV4 and PM5.
Thanks to @Msprg et al
PacketResponseNGPreamble is 10 bytes, so data[] sat two past a word
boundary while its source is word aligned. The residues differ, so the
memcpy word path could never trigger for a reply.
Offset the whole frame by two in the buffer and data[] lands aligned.
Costs two bytes of stack. The preamble, the frame length and every byte
on the wire are unchanged, so no client change is needed.
hw status transfer speed on RDV4: 630240 -> 788736 bytes/s. That is
about 1us/packet off the link floor; what remains is usb_write waiting
for the host, not device work.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The OLD frame size was tied to the NG one, but the bootloader only speaks
OLD - growing PM3_CMD_DATA_SIZE would silently change sizeof(PacketCommandOLD)
and break flashing against every deployed bootrom in both directions.
Pin the OLD structs to their own constant and use it on every OLD path:
reply_old and the OLD receive branch on both sides, the bootrom, and the
flasher's write_block/send_finish_write_cmd, which memcpy into a
PacketCommandOLD using the NG size.
No behaviour change - both constants are 512 and armsrc .text is
byte-identical before and after.
in appmain.c and cmd added.
in cmd.c and add some code for test CEP
in em4x50.c(Do not timeout--)
in em4x70.c
in emvsim.c
in epa.c
in felica.c
in felicasim.c
in felicasim.c
in hfops.c
in hfsnoop.c
in hitag2.c
in hitag_common.c(Cross-platform implementation is incomplete.)
in hitagS.c
in hitagu.c
in i2c.c(Incomplete, continue to abstract.)
in i2c_direct.c
in iclass.c
in iso14443a.c(Sniff no finish yet)
in iso14443b.c and fixed bug for st25
in iso15693.c
in legicrf.c
in legicrfsim.c
in lfadc.c(lf_count_edge_periods_ex() improved)
in lfops.c(TI tag no finish yet)
in lfsampling.c
in lfzx.c
in mifarecmd.c
in mifaredesfire.c
in mifaresim.c
in mifaresniff_disabled.c
in mifareutil.c
in pcf7931.c
in sam_xxx
in secc & seos
in start.c
in thinfilm.c
in utils
* .h include only the strict minimum for their own parsing
* this forces all files to include explicitment their needs and not count on far streched dependencies
* this helps Makefile to rebuild only the minimum
* according to this rule, most standalone .h are now gone
* big app.h is gone
* remove seldom __cplusplus, if c++ happens, everything will have to be done properly anyway
* all unrequired include were removed
* split common/ into common/ (client+arm) and common_arm/ (os+bootloader)
* bring zlib to common/
* bring stuff not really/not yet used in common back to armsrc/ or client/
* bring liblua into client/
* bring uart into client/
* move some portions of code around (dbprint, protocols,...)
* rename unused files into *_disabled.[ch] to make it explicit
* rename soft Uarts between 14a, 14b and iclass, so a standalone could use several without clash
* remove PrintAndLogDevice
* move deprecated-hid-flasher from client to tools
* Makefiles
* treat deps in armsrc/ as in client/
* client: stop on warning (-Werror), same as for armsrc/
Tested on:
* all standalone modes
* Linux
iceman1001