burble/dn42regsrv
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automatically split larger blocks if there aren't enough spare blocks within a specific prefix length

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Simon Marsh 2022-08-01 11:18:18 +01:00
parent f98f561b86
commit 9314f4397d
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GPG Key ID: 0FCCD13AE1CF7ED8
1 changed files with 57 additions and 15 deletions
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72
StaticRoot/free.js
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@ -270,35 +270,77 @@ Vue.component('app-free4', {
this.scanSubnets(0, 0, 0, 'undefined')
},
// filter subnets based on prefix length
filterFree() {
// pick 10 random prefixes of a certain length
pick10(prefix) {
// may be called with an empty free list
if (this.free4.length == 0) {
return { total: 0, blocks: [ ] }
}
var tlist = [ ]
// filter the free list
// filter the free list by this prefix size
this.free4.forEach(free => {
if (free.plen == this.filter) {
if (free.plen == prefix) {
tlist.push(free)
}
})
this.ftotal = tlist.length
// if there are fewer than 10 prefixes,
// split some of the next largest blocks
if (tlist.length < 10) {
const bit = (2**(32 - prefix))>>>0
const tmp = this.pick10(prefix-1)
const blocks = tmp.blocks
// pick up to ten random prefixes
while(tlist.length < 10) {
var ix = Math.floor(Math.random()*blocks.length)
const obj = blocks[ix]
// split the block
tlist.push({
subnet: (obj.subnet & (~bit))>>>0,
mask: (obj.mask | bit)>>>0,
plen: prefix
})
tlist.push({
subnet: (obj.subnet | bit)>>>0,
mask: (obj.mask | bit)>>>0,
plen: prefix
})
blocks.splice(ix, 1)
}
}
const total = tlist.length
// select 10 random prefixes
var result = [ ]
for(var i = 0; ((tlist.length > 0) && (i < 10)); i++) {
var ix = Math.round(Math.random() * tlist.length)
var obj = tlist[ix]
for (var i = 0; ((tlist.length > 0) && (i < 10)); i++) {
var ix = Math.floor(Math.random()*tlist.length)
result.push(tlist[ix])
tlist.splice(ix,1)
}
return { total: total, blocks: result }
},
// filter subnets based on prefix length
filterFree() {
var result = [ ]
tmp = this.pick10(this.filter)
this.ftotal = tmp.total
blocks = tmp.blocks
for(var i = 0; i < blocks.length; i++) {
const obj = blocks[i]
// push to result
var octets = [ ]
octets[0] = (obj.subnet >> 24) & 0xFF
octets[1] = (obj.subnet >> 16) & 0xFF
octets[2] = (obj.subnet >> 8) & 0xFF
octets[3] = obj.subnet & 0xFF
result.push(octets.join(".")+'/'+obj.plen)
// remove from the list
tlist.splice(ix, 1)
result.push(octets.join(".")+'/'+obj.plen)
}
this.filtered.splice(0, this.filtered.length, ...result)
@ -537,7 +579,7 @@ Vue.component('app-free6', {
// create 48bits of random address
var quads = [ ]
for(var j = 0; j < 3; j++) {
quads[j] = Math.round(Math.random()*65536)
quads[j] = Math.floor(Math.random()*65536)
}
// fix the first byte to be in fd00::/8
quads[0] = 0xFD00 + (quads[0] & 0xFF)
@ -669,7 +711,7 @@ Vue.component('app-asn', {
var nlist = [ ]
for(var i = 0; i < 10; i++) {
// pick a random free ASN
var rand = Math.round(Math.random() * this.free.length)
var rand = Math.floor(Math.random() * this.free.length)
nlist.push(this.free[rand])
}