michaelrsweet
commented
1 year ago [v1.3.x bef9c2e] Mirror Avahi fix (Issue #276)
Closed tillkamppeter closed 1 year ago
michaelrsweet
commented
1 year ago [v1.3.x bef9c2e] Mirror Avahi fix (Issue #276)
If we provide the service on localhost only, we have to register with the interface index of the loopback device "lo". This is NOT 0. the Interface index 0 is reserved for if_nametoindex() function to report an error condition. So we have to use if_nametoindex("lo") to get the actual index (which is probably not always the sane, as its actual value is nowhere documented).
When we call any avahi_entry_groupadd...() function, the second argument is the interface index, and we have to use the one we selected in the beginning (if_index). The forth parameter is a for a set of flags, which one should set to 0 ("flags: Only != 0 if you really know what you do"). It is for sure wrong to supply the interface index here.