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misc: moved protocol indicator to alpn header

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This commit is contained in:
Sheen Capadngan
2025-09-09 04:35:13 +08:00
parent c297961d04
commit f86f3cea99
1 changed files with 21 additions and 23 deletions
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44
backend/src/lib/gateway-v2/gateway-v2.ts
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@@ -77,8 +77,15 @@ const createRelayConnection = async ({
const createGatewayConnection = async (
relayConn: net.Socket,
gateway: { clientCertificate: string; clientPrivateKey: string; serverCertificateChain: string }
gateway: { clientCertificate: string; clientPrivateKey: string; serverCertificateChain: string },
protocol: GatewayProxyProtocol
): Promise<net.Socket> => {
const protocolToAlpn = {
[GatewayProxyProtocol.Http]: "infisical-http-proxy",
[GatewayProxyProtocol.Tcp]: "infisical-tcp-proxy",
[GatewayProxyProtocol.Ping]: "infisical-ping"
};
const tlsOptions: tls.ConnectionOptions = {
socket: relayConn,
cert: gateway.clientCertificate,
@@ -86,7 +93,8 @@ const createGatewayConnection = async (
ca: splitPemChain(gateway.serverCertificateChain),
minVersion: "TLSv1.2",
maxVersion: "TLSv1.3",
rejectUnauthorized: true
rejectUnauthorized: true,
ALPNProtocols: [protocolToAlpn[protocol]]
};
return new Promise((resolve, reject) => {
@@ -153,39 +161,29 @@ const setupRelayServer = async ({
});
// Stage 2: Establish mTLS connection to gateway through the relay
const gatewayConn = await createGatewayConnection(relayConn, gateway);
const gatewayConn = await createGatewayConnection(relayConn, gateway, protocol);
let command = "";
// Send protocol data to gateway
// Send protocol-specific configuration for HTTP requests
if (protocol === GatewayProxyProtocol.Http) {
command += "FORWARD-HTTP";
// extract ca certificate from httpsAgent if present
if (httpsAgent) {
const agentOptions = httpsAgent.options;
if (agentOptions && agentOptions.ca) {
const caCert = Array.isArray(agentOptions.ca) ? agentOptions.ca.join("\n") : agentOptions.ca;
const caB64 = Buffer.from(caCert as string).toString("base64");
command += ` ca=${caB64}`;
const rejectUnauthorized = agentOptions.rejectUnauthorized !== false;
command += ` verify=${rejectUnauthorized}`;
const configCommand = `CONFIG ca=${caB64} verify=${rejectUnauthorized}\n`;
gatewayConn.write(Buffer.from(configCommand));
} else {
// Send empty config to signal end of configuration
gatewayConn.write(Buffer.from("CONFIG\n"));
}
} else {
// Send empty config to signal end of configuration
gatewayConn.write(Buffer.from("CONFIG\n"));
}
command += "\n";
} else if (protocol === GatewayProxyProtocol.Tcp) {
command += `FORWARD-TCP\n`;
} else if (protocol === GatewayProxyProtocol.Ping) {
command += `PING\n`;
} else {
throw new BadRequestError({
message: `Invalid protocol: ${protocol as string}`
});
}
gatewayConn.write(Buffer.from(command));
// Bidirectional data forwarding
clientConn.pipe(gatewayConn);
gatewayConn.pipe(clientConn);