Init

IDEA

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+- each computer should have its configuration
+	- QEMU
+	- systemd-networkd? (
+	- BIRD
+- Also: bridges-up script to set up all the bridges.
+- Network should have reasonable addressing scheme
+	- IP
+	- MAC
+
+MAC:52:54:00:17:<mach>:<net>
+IP: 172.23.<net>.<mach>
+
+Rationale: mac is host-based, ip is net-based. This mimmics real networks. The
+23 = 0x17 is just a number between 16 and 31 without meaning. MAC OUI is from
+QEMU, could be something else (it _is_ locally administered), but this is
+recognisable.
+
+QEMU flags:
+	-enable-kvm
+	-m 200M # enough?
+	-drive ...
+	- networks (copy from Zr/arch)
+	-name
+- Networks: just bridges with tap-s attached.
+- OS: Alpine? (/etc/network/interfaces is configurable by mac)
+- Clonined hdds? Single base hdd + overlay for bird.conf?
+
+Impl: python with jinja. We want a templating engine, since most of the configs
+are the same, and something to represent computers and networks.

baz.py

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+#!/bin/python3
+
+import ipaddress
+import jinja2
+import os
+import sys
+import pathlib
+
+class Bridge:
+	def __init__(self, name, num):
+		self.name = name
+		self.num = num
+		self.computers = []
+
+class Computer:
+	def __init__(self, name, num):
+		self.name = name
+		self.num = num
+		self.bridges = []
+
+	def add_to_bridge(self, bridge):
+		self.bridges.append(bridge)
+		bridge.computers.append(computer)
+
+	def gen_files(self):
+		files = [
+			'qemu.sh',
+			'interfaces',
+			'bird.conf',
+			]
+		context = {'c': self}
+	
+		loader = jinja2.FileSystemLoader('templates/')
+		environment = jinja2.Environment(loader=loader, trim_blocks=True)
+		for f in files:
+			template = environment.get_template(f)
+			template.stream(context).dump(self.name + '/' + f)
+
+# Computers:
+comps = {}
+for i, n in enumerate('ABCDEFGHIX'):
+	comps[n] = Computer(n, i)
+
+# Bridges
+bridges = {}
+for i, n in [(x, 'net_'+str(x)) for x in range(1, 8)]:
+	bridges[n] = Bridge(n, i)
+
+def dump_bridges(fn):
+	with open(fn, 'w+') as f:
+		for br in bridges:
+			f.write(br + '\n')
+
+# Connections
+# dict[ net_num -> [comp_names]
+conns = {
+	1: 'IGH',
+	2: 'HCE',
+	3: 'GDF',
+	4: 'ACD',
+	5: 'BEF',
+	6: 'ABX',
+	7: 'X',
+	}
+
+for net, cs in conns.items():
+	for c in cs:
+		comps[c].add_to_bridge(bridges[net])
+
+dump_bridges('./bridges')