Question

I want to write a C program that can search Bonjour enabled devices on network.

Basically we have a Network IP Camera, it supports Bonjour protocol. I want to write API in C that can search these devices which have Bonjour enabled. Does anyone have sample code or suggestions on how should I do that?

Answer 1

The following links provide some code samples, as you requested:

mDNSResponder

Quotes from mDNSPosix/ReadMe.txt:

mDNSPosix is a port of Apple’s Multicast DNS and DNS Service Discovery
code to Posix platforms.

Multicast DNS and DNS Service Discovery are technologies that allow
you to register IP-based services and browse the network for those
services.

Packing List:

The sample uses the following directories:

o mDNSCore — A directory containing the core mDNS code. This code
is written in pure ANSI C and has proved to be very portable. Every
platform needs this core protocol engine code.

o mDNSShared — A directory containing useful code that’s not core to
the main protocol engine itself, but nonetheless useful, and used by
more than one (but not necessarily all) platforms.

o mDNSPosix — The files that are specific to Posix platforms: Linux,
Solaris, FreeBSD, NetBSD, OpenBSD, etc. This code will also work on
OS X, though that’s not its primary purpose.

o Clients — Example client code showing how to use the API to the
services provided by the daemon.

Using the Sample
—————- When you compile, you will get:

o Main products for general-purpose use (e.g. on a desktop computer):
– mdnsd
– libmdns
– nss_mdns (See nss_ReadMe.txt for important information about nss_mdns)

o Standalone products for dedicated devices (printer, network camera,
etc.)
– mDNSClientPosix
– mDNSResponderPosix
– mDNSProxyResponderPosix

o Testing and Debugging tools
– dns-sd command-line tool (from the “Clients” folder)
– mDNSNetMonitor
– mDNSIdentify

SDWrap

ReadMe:

Quite simple wrapper app to execute some command with Zeroconf
supplied addresses and ports. Uses wxWidgets and wxServDisc for
service discovery…

Good luck!