Juergen Kunz
f3e1c96872
Full-featured SIP router with multi-provider trunking, browser softphone via WebRTC, real-time Opus/G.722/PCM transcoding in Rust, RNNoise ML noise suppression, Kokoro neural TTS announcements, and a Lit-based web dashboard with live call monitoring and REST API.
55 lines
1.5 KiB
TypeScript
55 lines
1.5 KiB
TypeScript
/**
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* SIP URI and SDP body rewriting helpers.
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*/
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import type { IEndpoint } from './types.ts';
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const SIP_URI_RE = /(sips?:)([^@>;,\s]+@)?([^>;,\s:]+)(:\d+)?/g;
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/**
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* Replaces the host:port in every `sip:` / `sips:` URI found in `value`.
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*/
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export function rewriteSipUri(value: string, host: string, port: number): string {
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return value.replace(SIP_URI_RE, (_m, scheme: string, userpart?: string) =>
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`${scheme}${userpart || ''}${host}:${port}`);
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}
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/**
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* Rewrites the connection address (`c=`) and audio media port (`m=audio`)
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* in an SDP body. Returns the rewritten body together with the original
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* endpoint that was replaced (if any).
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*/
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export function rewriteSdp(
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body: string,
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ip: string,
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port: number,
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): { body: string; original: IEndpoint | null } {
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let origAddr: string | null = null;
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let origPort: number | null = null;
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const out = body
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.replace(/\r\n/g, '\n')
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.split('\n')
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.map((line) => {
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if (line.startsWith('c=IN IP4 ')) {
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origAddr = line.slice('c=IN IP4 '.length).trim();
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return `c=IN IP4 ${ip}`;
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}
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if (line.startsWith('m=audio ')) {
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const parts = line.split(' ');
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if (parts.length >= 2) {
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origPort = parseInt(parts[1], 10);
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parts[1] = String(port);
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}
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return parts.join(' ');
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}
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return line;
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})
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.join('\r\n');
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return {
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body: out,
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original: origAddr && origPort ? { address: origAddr, port: origPort } : null,
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};
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}
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