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Add support for management vlan

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This adds support for the verification of a mangement vlan.
When enabled, then the switch's CPU will not listen to any packets
that are not tagged with the respective VLAN tag.
On the command line this is enabled by setting:
> vlan <vlan> mgmt

Setting the vlan ID of the management VLAN to 0 or 1 disables
the mangement VLAN function.
This commit is contained in:
logicog
2026-01-29 19:56:01 +01:00
parent aae055123e
commit 9d4eef2dd6
2 changed files with 19 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd_parser.c
+9 -4
View File
@@ -42,6 +42,7 @@ extern __xdata struct dhcp_state dhcp_state;
__xdata uint8_t vlan_names[VLAN_NAMES_SIZE];
__xdata uint16_t vlan_ptr;
extern __xdata uint16_t management_vlan;
__xdata uint8_t gpio_last_value[8] = { 0 };
// Temporatly for str to hex convertion value.
@@ -289,16 +290,20 @@ void parse_vlan(void)
vlan_delete(vlan);
return;
}
if (cmd_words_b[2] > 0 && cmd_compare(2, "mgmt")) {
management_vlan = vlan;
if (!vlan)
print_string("Management VLAN disabled\n");
else
print_string("Management VLAN set to "); print_short(management_vlan); write_char('\n');
return;
}
uint8_t w = 2;
write_char('#');
print_byte(cmd_words_b[w] );
write_char('#'); write_char(cmd_buffer[cmd_words_b[w]]);
if (cmd_words_b[w] > 0 && isletter(cmd_buffer[cmd_words_b[w]])) {
register uint8_t i = 0;
vlan_names[vlan_ptr++] = hex[(vlan >> 8) & 0xf];
vlan_names[vlan_ptr++] = hex[(vlan >> 4) & 0xf] ;
vlan_names[vlan_ptr++] = hex[vlan & 0xf];
print_string("COPYING: >");
while(cmd_buffer[cmd_words_b[w] + i] != ' ') {
write_char(cmd_buffer[cmd_words_b[w] + i]);
vlan_names[vlan_ptr++] = cmd_buffer[cmd_words_b[w] + i++];
rtlplayground.c
+4 -2
View File
@@ -105,6 +105,7 @@ __xdata uint8_t rx_headers[16]; // Packet header(s) on RX
__xdata uint8_t uip_buf[UIP_CONF_BUFFER_SIZE+2];
__xdata uint16_t rx_packet_vlan;
__xdata uint16_t management_vlan;
__xdata uint8_t tx_seq;
__xdata uint8_t stpEnabled;
@@ -115,7 +116,6 @@ __code uint16_t bit_mask[16] = {
};
__xdata uint8_t was_offline;
__xdata uint8_t linkbits_last[4];
__xdata uint8_t linkbits_last_p89;
__xdata uint8_t sfp_pins_last;
@@ -921,6 +921,7 @@ void handle_rx(void)
tcpip_output();
}
} else if (uip_buf[ETHERTYPE_OFFSET] == 0x08 && uip_buf[ETHERTYPE_OFFSET + 1] == 0x00) { // TCP?
if (!management_vlan || management_vlan == rx_packet_vlan) {
uip_arp_ipin(); // Learn MAC addresses in TCP packets
uip_input();
if (uip_len) {
@@ -928,6 +929,7 @@ void handle_rx(void)
uip_arp_out();
tcpip_output();
}
}
} else {
#ifdef RXTXDBG
print_string("Unknown RX on port "); print_byte(rx_headers[3] & 0xf); write_char('\n');
@@ -1950,7 +1952,7 @@ void bootloader(void)
uip_arp_init();
httpd_init();
was_offline = 1;
management_vlan = 0; // Disabled
setup_i2c();