func (s *networkSuite) TestNetworkNames(c *gc.C) {
for i, test := range networkNameTests {
c.Logf("test %d: %q", i, test.pattern)
c.Check(names.IsNetwork(test.pattern), gc.Equals, test.valid)
if test.valid {
expectTag := fmt.Sprintf("%s-%s", names.NetworkTagKind, test.pattern)
c.Check(names.NetworkTag(test.pattern), gc.Equals, expectTag)
} else {
expectErr := fmt.Sprintf("%q is not a valid network name", test.pattern)
testNetworkTag := func() { names.NetworkTag(test.pattern) }
c.Check(testNetworkTag, gc.PanicMatches, regexp.QuoteMeta(expectErr))
}
}
}
// AddNetwork creates a new network with the given params. If a
// network with the same name or provider id already exists in state,
// an error satisfying errors.IsAlreadyExists is returned.
func (st *State) AddNetwork(args NetworkInfo) (n *Network, err error) {
defer errors.Contextf(&err, "cannot add network %q", args.Name)
if args.CIDR != "" {
_, _, err := net.ParseCIDR(args.CIDR)
if err != nil {
return nil, err
}
}
if args.Name == "" {
return nil, fmt.Errorf("name must be not empty")
}
if !names.IsNetwork(args.Name) {
return nil, fmt.Errorf("invalid name")
}
if args.ProviderId == "" {
return nil, fmt.Errorf("provider id must be not empty")
}
if args.VLANTag < 0 || args.VLANTag > 4094 {
return nil, fmt.Errorf("invalid VLAN tag %d: must be between 0 and 4094", args.VLANTag)
}
doc := newNetworkDoc(args)
ops := []txn.Op{{
C: st.networks.Name,
Id: args.Name,
Assert: txn.DocMissing,
Insert: doc,
}}
err = st.runTransaction(ops)
switch err {
case txn.ErrAborted:
if _, err = st.Network(args.Name); err == nil {
return nil, errors.AlreadyExistsf("network %q", args.Name)
} else if err != nil {
return nil, err
}
case nil:
// We have a unique key restriction on the ProviderId field,
// which will cause the insert to fail if there is another
// record with the same provider id in the table. The txn
// logic does not report insertion errors, so we check that
// the record has actually been inserted correctly before
// reporting success.
if _, err = st.Network(args.Name); err != nil {
return nil, errors.AlreadyExistsf("network with provider id %q", args.ProviderId)
}
return newNetwork(st, doc), nil
}
return nil, err
}