Returns a JSON array of all configured VLANs with their IDs and names,
e.g. [{"id":1,"name":""},{"id":20,"name":"IoT"}].
The endpoint iterates VLAN IDs 1..4094 and filters by the validity bit
in sfr_data[0] (0x02), following the same pattern as vlan_create() and
vlan_setup() in rtl837x_port.c.
Also adds a small itoa16_html() helper for emitting decimal numbers
up to 4 digits (analogous to the existing 8-bit itoa_html()), used
for VLAN IDs which can reach 4094. Response builder uses the existing
vlan_name() helper for the name lookup, consistent with send_vlan().
Buffer overflow is prevented by breaking out of the iteration loop at
TCP_OUTBUF_SIZE - 60.
This endpoint is the foundation for upcoming UI improvements
(VLAN selector dropdown and overview table).
1. While loop scanning VLAN name terminated only on ' ', not '\0'.
When the name is the last token in cmd_buffer, the loop reads past
the buffer into adjacent XRAM.
2. Entering 'vlan' without arguments causes parse_vlan() to read
cmd_words_b[1] which points to undefined memory, causing atoi_short()
to interpret residual bytes from previous commands as a VLAN ID.
Bug found and fix proposed by logicog during review of PR #232.
Co-Authored-By: logicog <logicog@users.noreply.github.com>
Adds CLI reference for the previously undocumented vlan <id> mgmt
command, including the disable case (vlan 0 mgmt), default state,
and a lockout warning.
Fixes#235
Previously, renaming a VLAN or deleting and recreating it with a
different name did not update the displayed name. The vlan_names[]
array is an append-only buffer where vlan_name() returns the first
matching entry, so stale entries kept winning.
This commit adds vlan_name_remove(), which locates an entry by
VLAN ID and removes it via array compaction. The function is called
in two places:
- parse_vlan() in cmd_parser.c, before appending a new name entry,
to remove any pre-existing entry for the same VLAN ID
- vlan_delete() in rtl837x_port.c, to clean up the name when a
VLAN is removed
The implementation reuses the existing vlan_name() lookup, scans for
the trailing space of the matched entry, then shifts remaining bytes
left. Locals are declared as static __xdata to avoid the SDCC
overlay segment limit on banked functions.
Tested on KeepLiNK KP-9000-6XH-X:
- vlan 99 AAA p1u; vlan 99 BBB -> name updated to BBB
- vlan 99 d; vlan 99 CCC p1u -> name correctly CCC, not stale AAA
Note: This fix addresses the runtime XMEM state. Persistence of
renamed VLAN names across reboot requires the user to download and
re-upload /config, as is the existing pattern for all configuration
changes in this firmware.
Erdnusschokolade
