Saving the configuration drops the syslog server address whenever the log
of executed commands also contains "syslog on", which it almost always
does, since you have to enable the thing after pointing it somewhere.
parseConf() deduplicates by taking the matched text of a conf_overwrite
entry and removing every stored line that starts with it. For "syslog on"
the entry that matches is the catch-all ^syslog\b, so the matched text is
just "syslog" and the filter removes anything beginning with "syslog ",
including the "syslog ip ..." line saved a moment earlier. The address then
falls back to 0.0.0.0 on the next boot.
It fails quietly: nothing is reported, the running switch keeps logging
until it is restarted, and the loss looks like the firmware forgetting a
setting rather than the page dropping it.
Narrow the entry to the commands it is meant to collapse, so the address and
the port keep their own entries and are no longer collateral.
That alone would stop "syslog on" and "syslog off" from replacing each other,
because the list drops lines starting with the text it matched and "syslog off"
does not start with "syslog on". A separate list names the stem of such a pair
and collapses the two, which is what the catch-all used to do by accident.
The port was frozen at 514 in the call that opens the connection, so a
collector listening anywhere else was simply out of reach, and plenty do,
because 514 is privileged and containerised collectors usually get a high
port instead. Working around it meant putting a proxy in front, which then
rewrites the source address and hides which device actually sent the line.
Add `syslog port <n>`. The default stays 514, so nothing changes for an
existing configuration. Setting it tears the connection down and builds a
new one, the same dance the address already does, because uip_udp_new()
freezes the port into the connection.
The value is parsed here rather than through atoi_short(), which reports
"no digits" but not overflow: 65540 would quietly wrap to 4 and we would
open a connection to a port nobody asked for. Checking before each multiply
keeps it in 16-bit arithmetic. Zero then covers all three ways to be wrong -
no digits, past 65535, or an explicit "0", which is not a port either.
Whitelist the new command in config.js as well, next to `syslog ip`, or the
line is dropped without a word when the configuration is saved and the
setting quietly fails to survive a reboot. The dedup entry has to precede
the general `^syslog\b` one, otherwise it would deduplicate against
`syslog on`.
itoa_short() is new: itoa() only handles a byte and print_short() prints
hex, so there was no way to show a port as a decimal number. Kept separate
from itoa() rather than widening it, because every existing caller passes a
byte and would start paying for 16-bit divisions it does not need.
The scratch variables for the parser live in xdata. Locals there would take
internal RAM, and this image has none left: data ends at 0x77, the overlay
occupies 0x78-0x7f and the stack starts at 0x80. Measured: no module's DSEG
grew.
Add a device hostname settable from the CLI (`hostname <text>`) and the
System Settings page. The value is sanitized on ingest to JSON-safe
printable ASCII (<=23 chars), stored in a shared __xdata buffer, seeded
to "RTLPlayground" at boot, persisted through the startup-config, and
reported in /information.json. It lives in the common header so other
modules can advertise it (LLDP uses it as the System Name TLV).
A bare "vlan N" line never matches conf_cmds (a VLAN entry always carries
a member port or the mgmt/name keyword), so it is never stored. The
c !== "vlan N" comparison could therefore never match an entry; the
startsWith(prefix) check alone covers all stored vlan lines.
The firmware has a single management VLAN (one management_vlan variable),
so a stored config should never carry more than one "vlan N mgmt" line.
When parsing a mgmt command, drop any previously stored mgmt entry so
repeatedly changing the management VLAN no longer accumulates stale lines.
parseConf() only recognized "port N name" in conf_cmds, so "port N <speed>"
lines were treated as unknown commands and dropped on save - configured port
speeds never persisted.
Add the speed command (incl. optional half/full duplex suffix) to conf_cmds,
add a "port N" entry to conf_overwrite so re-saving a speed replaces the
previous value, and guard the per-port name entry so changing a port's speed
no longer wipes its configured name.
The vlan/mgmt lookahead split (commit dcc60c3) correctly separated the
patterns so that `vlan N mgmt` and `vlan N <members>` match different
conf_overwrite entries. But the filter that applies the overwrite still
used `item.startsWith(matchStr + " ")` with matchStr = "vlan N", which
also matches "vlan N mgmt" — so the management entry was removed whenever
the VLAN's membership definition was re-saved.
Example: with both `vlan 44 management 2t 4t 5 6t` and `vlan 44 mgmt`
in the config, changing the membership dropped `vlan 44 mgmt` entirely.
Added a `!item.endsWith(" mgmt")` guard so management entries survive the
filter. No reordering is needed: `vlan N mgmt` only sets the global
management_vlan variable (cmd_parser.c) and does not depend on the VLAN
table entry existing, so its position in the config is irrelevant.
The pattern /^vlan\s+\d{1,4}\b/ matched both VLAN membership entries
(vlan N <ports>) and management entries (vlan N mgmt), causing them
to overwrite each other in configuration[]. When saving, whichever
form came last in the cmd_log would dedupe the other out of the
final config — resulting in either lost membership or a stale mgmt
setting.
Split into two patterns using negative lookahead:
- /^vlan\s+\d{1,4}\s+mgmt$/ matches only mgmt entries
- /^vlan\s+\d{1,4}(?!\s+mgmt\b)/ matches everything else
Both dedup independently. Discovered via hardware test on 6XH-X
where 'vlan 44 mgmt' silently dropped 'vlan 44 management 2t 5u'
from saved config, locking out web UI on next boot.
Multiple related bugs in the Save-to-Flash path:
1. Multipart upload was missing the required filename argument,
causing the backend parser to fail. Added 'config.txt' to the
form.append call. This was likely the primary reason Save-to-Flash
was unreliable.
2. Web UI was not pausing its polling interval during flash write,
causing CPU contention and intermittent crashes. Added isSaving
lock and clearInterval before sendConfig.
3. conf_cmds whitelist was incomplete. Added: syslog, passwd, pvid,
ingress, port name, lag, laghash, isolate, stp, igmp, mtu, bw,
vlan N mgmt, vlan N d.
4. VLAN regex blocked named VLANs. New pattern allows optional name
(starts with letter, matching CLI parser semantics).
5. vlan N d (delete) was not persisted. parseConf now removes the
matching vlan N ... entry from configuration[] when seeing a
delete command, without storing the delete itself. Result: the
saved config describes the end state.
6. configuration[] was not cleared between flashSave invocations,
leading to stale entries from prior interactions.
7. conf_overwrite boundary fix: 'pvid 1' no longer matches 'pvid 10'
etc. Added trailing space in startsWith check.
8. All conf_cmds patterns now anchored with ^...$ for full-line
match. parseConf normalizes whitespace before testing.
9. Port range widened to \d{1,2} so ports 11+ are accepted.
Structural fixes (1, 2, 6, 7, 8) ported from mcaptur's closed PR #219;
remaining fixes (3, 4, 5, 9) and overall regex strategy are new.
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logicog