tonusoo

--- net/ipv6/route.c~   2025-08-08 13:44:04.928000000 +0300
+++ net/ipv6/route.c    2025-08-08 13:48:01.448000000 +0300
@@ -2221,24 +2221,13 @@
 int fib6_table_lookup(struct net *net, struct fib6_table *table, int oif,
                      struct flowi6 *fl6, struct fib6_result *res, int strict)
 {
-       struct fib6_node *fn, *saved_fn;
+       struct fib6_node *fn;

        fn = fib6_node_lookup(&table->tb6_root, &fl6->daddr, &fl6->saddr);

tonusoo

qemu-nbd --connect=/dev/nbd0 vJunos-router-23.2R1.15.qcow2
fdisk -l /dev/nbd0
mkdir -p /tmp/nbd0p2
mount -v /dev/nbd0p2 /tmp/nbd0p2
qemu-nbd --connect=/dev/nbd1 /tmp/nbd0p2/home/pfe/junos/junos-virtual-x86-64-23.2R1.15.qcow2
mkdir -p /tmp/nbd1p3
mount -t ufs -v -o ro,ufstype=44bsd /dev/nbd1p3 /tmp/nbd1p3
cp -v /tmp/nbd1p3/boot/loader.rc .
umount /tmp/nbd1p3
qemu-nbd --disconnect /dev/nbd1

tonusoo

[edit policy-options]
+   prefix-list DC1-aggregate {
+       10.10.0.0/23;
+   }
[edit policy-options]
+   policy-statement ISP-B-out-v4 {
+       term conditional-announcement {
+           from {
+               prefix-list DC1-aggregate;
+               condition conditional-announcement;

tonusoo

#!/usr/bin/env bash

# Find IPv4 prefixes which have non-unique origin AS number, i.e. the rightmost AS number.

get_origin_asn() {

    last_asn_elem="${1##* }"
    case "$last_asn_elem" in
        "{"*"}")
            # It's an AS-set.

tonusoo

BGP full feed in lab environment with gobgpd and BIRD

Prefixes are injected with patched gobgp. Systemd service template for gobgpd processes:

martin@bgp-feed:~$ cat /etc/systemd/system/gobgpd@.service
[Unit]
Description=GoBGP Routing Daemon - instance %i
After=network.target syslog.service
ConditionPathExists=/usr/local/etc/gobgpd-%i.conf

tonusoo

#!/usr/bin/env bash

# Title               : systemd-networkd-confgen
# Last modified date  : 8.02.2024
# Author              : Martin Tonusoo
# Description         : Script manages systemd-networkd conf files
#                       with "[IPv6Prefix]" and "[IPv6SendRA]" configuration
#                       sections in /run/systemd/network/10-br0.network.d/
#                       directory. "[IPv6Prefix]" configuration is built based
#                       on the content of the files in /run/prefix-capture/

tonusoo

--- bgp_simple.pl~      2024-11-27 12:26:17.057483859 +0200
+++ bgp_simple.pl       2024-11-27 14:46:48.435675124 +0200
@@ -16,6 +16,8 @@
 use Net::BGP;
 use Net::BGP::Process;

+STDOUT->autoflush(1);
+
 my $version = "v0.12";
 my $version_date = "22-Jan-2011";

tonusoo

#!/usr/bin/python3 -u

"""
-> eth0: 192.168.17.36 -> 172.16.20.3 | protocol UDP | port 6000 | DATA |

<- eth1: 10.0.0.2 -> 10.0.0.1 | protocol UDP | port 6000 | DATA |


apt install --no-install-recommends python3-pcapy python3-scapy
"""

tonusoo

log syslog all;
debug protocols all;

router id 213.184.52.1;
define rtix_rs_asn = 207800;


# BGP ipv4/ipv6 channel option "secondary" requires
# routing table to be sorted.
ipv4 table master4 sorted;

tonusoo

interfaces {
    lo0 {
        unit 0 {
            family inet {
                filter {
                    input-list [ discard-ip-options discard-frags accept-single-hop-bfd-v4 accept-multi-hop-bfd-v4 accept-bgp-v4 accept-ospf2 accept-vrrpv3-v4 accept-established-v4 accept-common-services-v4 discard-all-v4 ];
                }
            }
            family inet6 {
                filter {