/** Removes the given set with the name and type. The data contained in the set is abstract. */ protected void removeSet(Name name, short type, TypedObject set) { TypeMap nameInfo = findName(name); if (nameInfo == null) return; Object o = nameInfo.get(type); if (o != set && type != Type.CNAME) { type = Type.CNAME; o = nameInfo.get(type); } if (o == set) { synchronized (nameInfo) { nameInfo.remove(type); } if (nameInfo.isEmpty()) data.remove(name); } }
/** Finds all matching sets or something that causes the lookup to stop. */ protected Object findSets(Name name, short type) { Object bestns = null; Object o; Name tname; int labels; int olabels; int tlabels; if (!name.subdomain(origin)) return null; labels = name.labels(); olabels = origin.labels(); for (tlabels = olabels; tlabels <= labels; tlabels++) { if (tlabels == olabels) tname = origin; else if (tlabels == labels) tname = name; else tname = new Name(name, labels - tlabels); TypeMap nameInfo = findName(tname); if (nameInfo == null) continue; /* If this is an ANY lookup, return everything. */ if (tlabels == labels && type == Type.ANY) return nameInfo.getAll(); /* Look for an NS */ if (tlabels > olabels || isCache) { o = nameInfo.get(Type.NS); if (o != null) { if (isCache) bestns = o; else return o; } } /* If this is the name, look for the actual type. */ if (tlabels == labels) { o = nameInfo.get(type); if (o != null) return o; } /* If this is the name, look for a CNAME */ if (tlabels == labels) { o = nameInfo.get(Type.CNAME); if (o != null) return o; } /* Look for a DNAME, unless this is the actual name */ if (tlabels < labels) { o = nameInfo.get(Type.DNAME); if (o != null) return o; } /* * If this is the name and this is a cache, look for an * NXDOMAIN entry. */ if (tlabels == labels && isCache) { o = nameInfo.get((short) 0); if (o != null) return o; } /* * If this is the name and we haven't matched anything, * just return the name. */ if (tlabels == labels) return nameInfo; } if (bestns == null) return null; else return bestns; }
/** * Finds all sets that exactly match. This does not traverse CNAMEs or handle Type ANY queries. */ protected Object findExactSet(Name name, short type) { TypeMap nameInfo = findName(name); if (nameInfo == null) return null; return nameInfo.get(type); }