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fix: include instance name in Login7 message and traceID in prelogin #1668

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3 changes: 2 additions & 1 deletion src/connection.ts
Original file line number Diff line number Diff line change
Expand Up @@ -873,6 +873,7 @@ export interface ConnectionOptions {
interface RoutingData {
server: string;
port: number;
instance: string;
}

/**
Expand Down Expand Up @@ -2484,7 +2485,7 @@ class Connection extends EventEmitter {
}

payload.hostname = this.config.options.workstationId || os.hostname();
payload.serverName = this.routingData ? this.routingData.server : this.config.server;
payload.serverName = this.routingData ? `${this.routingData.server}\\${this.routingData.instance}` : this.config.server;
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Is instance here guaranteed to always be a non-empty string? What happens if it's empty?

payload.appName = this.config.options.appName || 'Tedious';
payload.libraryName = libraryName;
payload.language = this.config.options.language;
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16 changes: 10 additions & 6 deletions src/login7-payload.ts
Original file line number Diff line number Diff line change
Expand Up @@ -251,15 +251,12 @@ class Login7Payload {
}

// (ibUnused / ibExtension): 2-byte
offset = fixedData.writeUInt16LE(dataOffset, offset);
const extensionOffsetHeaderOffset = offset;
offset = fixedData.writeUInt16LE(0, offset);


// (cchUnused / cbExtension): 2-byte
const extensions = this.buildFeatureExt();
offset = fixedData.writeUInt16LE(4, offset);
const extensionOffset = Buffer.alloc(4);
extensionOffset.writeUInt32LE(dataOffset += 4, 0);
dataOffset += extensions.length;
buffers.push(extensionOffset, extensions);

// ibCltIntName: 2-byte
offset = fixedData.writeUInt16LE(dataOffset, offset);
Expand Down Expand Up @@ -365,6 +362,13 @@ class Login7Payload {
fixedData.writeUInt32LE(0, offset);
}

fixedData.writeUInt16LE(dataOffset, extensionOffsetHeaderOffset);

const extensions = this.buildFeatureExt();
const extensionOffset = Buffer.alloc(4);
extensionOffset.writeUInt32LE(dataOffset + 4, 0);
buffers.push(extensionOffset, extensions);

const data = Buffer.concat(buffers);
data.writeUInt32LE(data.length, 0);
return data;
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6 changes: 3 additions & 3 deletions src/token/handler.ts
Original file line number Diff line number Diff line change
Expand Up @@ -246,7 +246,7 @@ export class Login7TokenHandler extends TokenHandler {
declare connection: Connection;

declare fedAuthInfoToken: FedAuthInfoToken | undefined;
declare routingData: { server: string, port: number } | undefined;
declare routingData: { server: string, port: number, instance: string } | undefined;

declare loginAckReceived: boolean;

Expand Down Expand Up @@ -337,10 +337,10 @@ export class Login7TokenHandler extends TokenHandler {

onRoutingChange(token: RoutingEnvChangeToken) {
// Removes instance name attached to the redirect url. E.g., redirect.db.net\instance1 --> redirect.db.net
const [ server ] = token.newValue.server.split('\\');
const [ server, instance ] = token.newValue.server.split('\\');

this.routingData = {
server, port: token.newValue.port
server, port: token.newValue.port, instance
};
}

Expand Down
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