From e53f5e7134cbcfe0dc1c926fc90b9a527f8c91cb Mon Sep 17 00:00:00 2001
From: logicog <git@logicog.de>
Date: Fri, 16 Jan 2026 18:00:34 +0100
Subject: [PATCH] Add L2 entry deletion support via web

---
 html/l2.js        |  2 +-
 httpd/httpd.c     |  3 +++
 httpd/page_impl.c | 55 ++++++++++++++++++++++++++++++++++++++++++++---
 httpd/page_impl.h |  1 +
 4 files changed, 57 insertions(+), 4 deletions(-)

diff --git a/html/l2.js b/html/l2.js
index be75787..b5af281 100644
--- a/html/l2.js
+++ b/html/l2.js
@@ -134,6 +134,6 @@ function getL2() {
 }
 
 window.addEventListener("load", function() {
-  l2GetInterval = setInterval(getL2, 300);
+  l2GetInterval = setInterval(getL2, 1000);
 });
 
diff --git a/httpd/httpd.c b/httpd/httpd.c
index bbb0a29..8e6b28c 100644
--- a/httpd/httpd.c
+++ b/httpd/httpd.c
@@ -576,6 +576,9 @@ void httpd_appcall(void)
 			} else if (is_word(q, "/l2.json")) {
 				parse_short(q + 13); // e.g.: /l2.json?idx=10
 				send_l2(short_parsed);
+			} else if (is_word(q, "/l2_del.json")) {
+				parse_short(q + 17);
+				l2_delete(short_parsed);
 			} else if (is_word(q, "/mirror.json")) {
 				send_mirror();
 			} else if (is_word(q, "/mtu.json")) {
diff --git a/httpd/page_impl.c b/httpd/page_impl.c
index 8727d3a..dceff3c 100644
--- a/httpd/page_impl.c
+++ b/httpd/page_impl.c
@@ -16,7 +16,7 @@
 // #define DEBUG
 #include "debug.h"
 
-#define L2_MAX_TRANSFER 2
+#define L2_MAX_TRANSFER 30
 
 #pragma codeseg BANK1
 #pragma constseg BANK1
@@ -288,8 +288,8 @@ void send_counters(char port)
 void send_l2(uint16_t idx)
 {
 	slen = strtox(outbuf, HTTP_RESPONCE_JSON);
-	dbg_string("sending L2\n");  // TODO: Remove
-	print_short(idx);
+	dbg_string("sending L2\n");
+	dbg_short(idx);
 	__xdata uint8_t entries_left = L2_MAX_TRANSFER;
 
 	do {
@@ -379,6 +379,55 @@ void send_l2(uint16_t idx)
 }
 
 
+void l2_delete(uint16_t idx)
+{
+	slen = strtox(outbuf, HTTP_RESPONCE_JSON);
+	dbg_string("L2 DELETE\n");
+	dbg_short(idx);
+	__xdata uint8_t entries_left = L2_MAX_TRANSFER;
+
+	do {
+		reg_read_m(RTL837X_TBL_CTRL);
+	} while (sfr_data[3] & 0x01);
+	slen += strtox(outbuf + slen, "{\"result\":");
+	// First, search for the entry based on the index
+	reg_read_m(RTL837x_TBL_DATA_0);
+	REG_WRITE(RTL837x_TBL_DATA_0, sfr_data[0], sfr_data[1],sfr_data[2] | 0xc0, sfr_data[3]);
+
+	REG_WRITE(RTL837X_TBL_CTRL, idx >> 8, idx, TBL_L2_UNICAST, 0x1);
+	do {
+		reg_read_m(RTL837X_TBL_CTRL);
+	} while (sfr_data[3] & 0x1);
+	reg_read_m(RTL837x_L2_DATA_OUT_B);
+	if (!(sfr_data[0] & 0x20)) {
+		char_to_html('0');
+	} else {
+		sfr_data[0] &= 0x3f; // Clear SPA
+		reg_write_m(RTL837x_TBL_DATA_IN_B);
+
+		// Second half of MAC is copied
+		reg_read_m(RTL837x_L2_DATA_OUT_A);
+		reg_write_m(RTL837x_TBL_DATA_IN_A);
+
+		reg_read_m(RTL837x_L2_DATA_OUT_C);
+		sfr_data[3] &= 0xc0; // Clear age, auth and second part of ports
+		sfr_data[1] &= 0xfe; // Clear nosalearn
+		reg_write_m(RTL837x_TBL_DATA_IN_C);
+
+		reg_read_m(RTL837x_TBL_DATA_0);
+		REG_WRITE(RTL837x_TBL_DATA_0, sfr_data[0], sfr_data[1],TBL_L2_UNICAST, sfr_data[3]);
+
+		REG_WRITE(RTL837X_TBL_CTRL, idx >> 8, idx, TBL_L2_UNICAST, TBL_WRITE | TBL_EXECUTE);
+		do {
+			reg_read_m(RTL837X_TBL_CTRL);
+		} while (sfr_data[3] & 0x1);
+
+		char_to_html('1');
+	}
+	char_to_html('}');
+}
+
+
 void send_mirror(void)
 {
 	dbg_string("send_mirror called\n");
diff --git a/httpd/page_impl.h b/httpd/page_impl.h
index a67d503..00c178c 100644
--- a/httpd/page_impl.h
+++ b/httpd/page_impl.h
@@ -7,6 +7,7 @@ void send_vlan(uint16_t vlan);
 void send_basic_info(void);
 void send_eee(void);
 void send_l2(uint16_t idx);
+void l2_delete(uint16_t idx);
 void send_mirror(void);
 void send_mtu(void);
 void send_config(void);