--- name: "wsdd2" section: "8" platform: "linux" package: "wsdd2" version: "1.8.7+dfsg-1.2" release: "Debian 13 (Trixie)" platforms: ["linux"] url: "https://new.carta.tech/wsdd2" --- # wsdd2(8) server to provide WSDD/LLMNR services to clients ## NAME wsdd2 - server to provide WSDD/LLMNR services to clients ## SYNOPSIS wsddd2 \[-h\] \[-d\] \[-4\] \[-6\] \[-u\] \[-t\] \[-l\] \[-w\] \[-L\] \[-W\] \[-i \\] \[-H \\] \[-N \\] \[-G \\] \[-b \\] ## DESCRIPTION **wsdd2** is the server daemon that provides WSDD (Web Services Dynamic Discovery) as well as LLMNR (Link-Local Multicast Name Resolution) services primarily for Windows clients on both IPv4 and IPv6. **wsdd2**'s WSDD protocol handler multicasts Hello and Bye messages by itself over UDP, responds with ProbeMatch and ResolveMatch messages in response to Probe and Resolve queries respectively over UDP, and sends HTTP reponse messages to HTTP property query POST messages over TCP. **wsdd2**'s LLMNR protocol handler responds to LLMNR multicast query messages over UDP and to LLMNR unicast query messages over TCP. **wsdd2** uses and listens on the following ports: 3702 UDP WSDD multicast group addresses 239.255.255.250 and ff02::c. 3702 TCP WSDD property query over HTTP. 5355 UDP LLMNR query multicast group addresses 224.0.0.252 and ff02::1:3. 5355 TCP LLMNR query unicast. ## OPTIONS - \-h Display a simple help messasge to stdout including currently in effect parameters' values. - \-d Fork off a child process to become daemon. - \-4 -6 Respond only to IPv4 and IPv6 respectively. Default is equivalent to "-4 -6". - \-u -t Respond only to UDP and TCP respectively. Default is equivalent to "-u -t". - \-l -w Respond only to LLMNR and WSDD respectively. Default is equivalent to "-l -w". - \-L Print out LLMNR debug messages to stdout. Multiple -L's to increment debug level. - \-W Print out WSDD debug messages to stdout. Multiple -W's to increment debug level. - \-i \ Use only specified interface to reply to incoming requests. Specifying "any" or leaving option out causes **wsdd2** to listen on every IPv4 or IPv6 capable interface excluding those that have names matching LeafNets, docker\*, veth\*, tun\*, ppp\*, zt\*. - \-H \ Use specified string as host name instead of first label before '.' of system host name retrieved with [**gethostname**(3)](/gethostname/3.md) or [**uname**(3)](/uname/3.md) functions. - \-N \ Use specified string as NETBIOS machine name instead of value returned by\ **testparm -s --parameter-name="netbios name"** command or system host name. - \-G \ Use specified string as workgroup name instead of value returned by\ **testparm -s --parameter-name="workgroup"** command or "WORKGROUP" default value. - \-b "*key1*:*val1*,*key2*:*val2*,*...*" Set WSDD query over HTTP response values in a comma-delimited list. The valid/necessary keys are: **vendor, model, serial, sku, vendorurl,** **modelurl, presentationurl**.\ This option overrides /proc/sys/dev/boot/info readouts. ## WSDD PROPERTY QUERY RESPONSE **wsdd2** responds to property queries using the following values over HTTP. If a value may be set with multiple methods, the latter in the method list has precedence. Vendor Value retrieved from /proc/sys/dev/boot/info or set with the -b option. Model Value retrieved from /proc/sys/dev/boot/info or set with the -b option. Serial Value retrieved from /proc/sys/dev/boot/info or set with the -b option or **0**. SKU Value retrieved from /proc/sys/dev/boot/info or set with the -b option. ModelURL Value set with the -b option. VendorURL Value set with the -b option. PresentationURL Value set with the -b option. ## FILES /etc/samba/smb.conf This is the default location of the Samba configuration file. /etc/machine-id A single line text file containing a host-unique UUID in the form of 32 lowercase hex digits used by [**systemd-id128**(1)](/systemd-id128/1.md). See [**machine-id**(5)](/machine-id/5.md). /proc/sys/dev/boot/info A list of *key*:*value* entries for WSDD query over HTTP response values. ## SIGNALS Sending the **wsdd2** a SIGHUP will cause it to restart. Restarting will bind daemon to new interfaces but will not reparse [**testparm**(1)](/testparm/1.md)'s output and other parameters, nor re-evaluate command line options - stop and start the daemon again for this. Address change, addition, or deletion on a network interface will restart **wsdd2** as well. SIGTERM and SIGINT will terminate **wsdd2** gracefully with WSDD "Bye" messages. ## SEE ALSO [**testparm**(1)](/testparm/1.md), [**systemd-id128**(1)](/systemd-id128/1.md). ## STANDARDS The WSDD protocol is described in detail in "Web Services Dynamic Discovery (WS-Discovery) Version 1.1" OASYS Standard, 1 July 2009\ http://docs.oasis-open.org/ws-dd/discovery/1.1/os/wsdd-discovery-1.1-spec-os.html LLMNR complies with RFC4795. ## AUTHOR Hiro Sugawara at NETGEAR authored the code. **wsdd2** was inspired by and uses some code from the wsdd/llmnr extension for smbd created by Tobias Waldvogel, Jose M. Prieto, and possibly other contributors.