Created
October 27, 2021 10:47
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| export class IPv4 { | |
| static from(input: string) { | |
| const [, a, b, c, d] = /(\d+)\.(\d+)\.(\d+)\.(\d+)/.exec(input)!; | |
| const address = ((Number(a) << 24) | (Number(b) << 16) | ((Number(c) << 8) | Number(d))) >>> 0; | |
| console.log(address.toString()); | |
| console.log(address.toString(2)); | |
| console.log(address.toString(16)); | |
| return new IPv4(address); | |
| } | |
| constructor(private readonly value: number) {} | |
| toString() { | |
| return this[Symbol.toPrimitive]('string'); | |
| } | |
| [Symbol.toPrimitive](hint: 'number'): number; | |
| [Symbol.toPrimitive](hint: 'string'): string; | |
| [Symbol.toPrimitive](hint: 'number' | 'string'): string | number | null { | |
| if (hint === 'number') { | |
| return this.value; | |
| } | |
| if (hint === 'string') { | |
| return `${(this.value >> 24) & 0xff}.${(this.value >> 16) & 0xff}.${ | |
| (this.value >> 8) & 0xff | |
| }.${this.value & 0xff}`; | |
| } | |
| console.log(hint); | |
| return null; | |
| } | |
| } | |
| export class CIDRBlock { | |
| static parse(cidr: string) { | |
| const variable = 32 - Number.parseInt(/\/(\d+)/.exec(cidr)![1]!, 10); | |
| const address = IPv4.from(cidr); | |
| let mask = 0; | |
| for (let i = 0; i < variable; i++) { | |
| mask |= (1 << i) >>> 0; | |
| } | |
| return { start: address, end: (address | mask) >>> 0, mask }; | |
| } | |
| readonly start: IPv4; | |
| readonly end: IPv4; | |
| readonly mask: number; | |
| constructor(address: string) { | |
| const { start, end, mask } = CIDRBlock.parse(address); | |
| this.start = start; | |
| this.end = new IPv4(end); | |
| this.mask = mask; | |
| } | |
| } |
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