// Freeze a Group into a flattened protobuf-based structure
// ready to be persisted to disk.
func FreezeGroup(group acl.Group) (*freezer.Group, error) {
frozenGroup := &freezer.Group{}
frozenGroup.Name = proto.String(group.Name)
frozenGroup.Inherit = proto.Bool(group.Inherit)
frozenGroup.Inheritable = proto.Bool(group.Inheritable)
for _, id := range group.AddUsers() {
frozenGroup.Add = append(frozenGroup.Add, uint32(id))
}
for _, id := range group.RemoveUsers() {
frozenGroup.Remove = append(frozenGroup.Remove, uint32(id))
}
return frozenGroup, nil
}
// Unfreeze unfreezes the contents of a freezer.Channel
// into a channel.
func (c *Channel) Unfreeze(fc *freezer.Channel) {
if fc.Name != nil {
c.Name = *fc.Name
}
if fc.Position != nil {
c.Position = int(*fc.Position)
}
if fc.InheritAcl != nil {
c.ACL.InheritACL = *fc.InheritAcl
}
if fc.DescriptionBlob != nil {
c.DescriptionBlob = *fc.DescriptionBlob
}
// Update ACLs
if fc.Acl != nil {
c.ACL.ACLs = nil
for _, facl := range fc.Acl {
aclEntry := acl.ACL{}
if facl.ApplyHere != nil {
aclEntry.ApplyHere = *facl.ApplyHere
}
if facl.ApplySubs != nil {
aclEntry.ApplySubs = *facl.ApplySubs
}
if facl.UserId != nil {
aclEntry.UserId = int(*facl.UserId)
} else {
aclEntry.UserId = -1
}
if facl.Group != nil {
aclEntry.Group = *facl.Group
}
if facl.Deny != nil {
aclEntry.Deny = acl.Permission(*facl.Deny)
}
if facl.Allow != nil {
aclEntry.Allow = acl.Permission(*facl.Allow)
}
c.ACL.ACLs = append(c.ACL.ACLs, aclEntry)
}
}
// Update groups
if fc.Groups != nil {
c.ACL.Groups = make(map[string]acl.Group)
for _, fgrp := range fc.Groups {
if fgrp.Name == nil {
continue
}
g := acl.Group{}
if fgrp.Inherit != nil {
g.Inherit = *fgrp.Inherit
}
if fgrp.Inheritable != nil {
g.Inheritable = *fgrp.Inheritable
}
for _, uid := range fgrp.Add {
g.Add[int(uid)] = true
}
for _, uid := range fgrp.Remove {
g.Remove[int(uid)] = true
}
c.ACL.Groups[g.Name] = g
}
}
// Hook up links, but make them point to the channel itself.
// We can't be sure that the channels the links point to exist
// yet, so we delay hooking up the map 'correctly' to later.
if fc.Links != nil {
c.Links = make(map[int]*Channel)
for _, link := range fc.Links {
c.Links[int(link)] = c
}
}
}
// ACL set/query
func (server *Server) handleAclMessage(client *Client, msg *Message) {
pacl := &mumbleproto.ACL{}
err := proto.Unmarshal(msg.buf, pacl)
if err != nil {
client.Panic(err)
return
}
// Look up the channel this ACL message operates on.
channel, ok := server.Channels[int(*pacl.ChannelId)]
if !ok {
return
}
// Does the user have permission to update or look at ACLs?
if !acl.HasPermission(&channel.ACL, client, acl.WritePermission) && !(channel.parent != nil && acl.HasPermission(&channel.parent.ACL, client, acl.WritePermission)) {
client.sendPermissionDenied(client, channel, acl.WritePermission)
return
}
reply := &mumbleproto.ACL{}
reply.ChannelId = proto.Uint32(uint32(channel.Id))
channels := []*Channel{}
users := map[int]bool{}
// Query the current ACL state for the channel
if pacl.Query != nil && *pacl.Query != false {
reply.InheritAcls = proto.Bool(channel.ACL.InheritACL)
// Walk the channel tree to get all relevant channels.
// (Stop if we reach a channel that doesn't have the InheritACL flag set)
iter := channel
for iter != nil {
channels = append([]*Channel{iter}, channels...)
if iter == channel || iter.ACL.InheritACL {
iter = iter.parent
} else {
iter = nil
}
}
// Construct the protobuf ChanACL objects corresponding to the ACLs defined
// in our channel list.
reply.Acls = []*mumbleproto.ACL_ChanACL{}
for _, iter := range channels {
for _, chanacl := range iter.ACL.ACLs {
if iter == channel || chanacl.ApplySubs {
mpacl := &mumbleproto.ACL_ChanACL{}
mpacl.Inherited = proto.Bool(iter != channel)
mpacl.ApplyHere = proto.Bool(chanacl.ApplyHere)
mpacl.ApplySubs = proto.Bool(chanacl.ApplySubs)
if chanacl.UserId >= 0 {
mpacl.UserId = proto.Uint32(uint32(chanacl.UserId))
users[chanacl.UserId] = true
} else {
mpacl.Group = proto.String(chanacl.Group)
}
mpacl.Grant = proto.Uint32(uint32(chanacl.Allow))
mpacl.Deny = proto.Uint32(uint32(chanacl.Deny))
reply.Acls = append(reply.Acls, mpacl)
}
}
}
parent := channel.parent
allnames := channel.ACL.GroupNames()
// Construct the protobuf ChanGroups that we send back to the client.
// Also constructs a usermap that is a set user ids from the channel's groups.
reply.Groups = []*mumbleproto.ACL_ChanGroup{}
for _, name := range allnames {
var (
group acl.Group
hasgroup bool
pgroup acl.Group
haspgroup bool
)
group, hasgroup = channel.ACL.Groups[name]
if parent != nil {
pgroup, haspgroup = parent.ACL.Groups[name]
}
mpgroup := &mumbleproto.ACL_ChanGroup{}
mpgroup.Name = proto.String(name)
mpgroup.Inherit = proto.Bool(true)
if hasgroup {
mpgroup.Inherit = proto.Bool(group.Inherit)
}
mpgroup.Inheritable = proto.Bool(true)
if hasgroup {
mpgroup.Inheritable = proto.Bool(group.Inheritable)
}
mpgroup.Inherited = proto.Bool(haspgroup && pgroup.Inheritable)
// Add the set of user ids that this group affects to the user map.
// This is used later on in this function to send the client a QueryUsers
// message that maps user ids to usernames.
if hasgroup {
toadd := map[int]bool{}
for uid, _ := range group.Add {
users[uid] = true
toadd[uid] = true
}
for uid, _ := range group.Remove {
users[uid] = true
delete(toadd, uid)
}
for uid, _ := range toadd {
mpgroup.Add = append(mpgroup.Add, uint32(uid))
}
}
if haspgroup {
for uid, _ := range pgroup.MembersInContext(&parent.ACL) {
users[uid] = true
mpgroup.InheritedMembers = append(mpgroup.InheritedMembers, uint32(uid))
}
}
reply.Groups = append(reply.Groups, mpgroup)
}
if err := client.sendMessage(reply); err != nil {
client.Panic(err)
return
}
// Map the user ids in the user map to usernames of users.
queryusers := &mumbleproto.QueryUsers{}
for uid, _ := range users {
user, ok := server.Users[uint32(uid)]
if !ok {
client.Printf("Invalid user id in ACL")
continue
}
queryusers.Ids = append(queryusers.Ids, uint32(uid))
queryusers.Names = append(queryusers.Names, user.Name)
}
if len(queryusers.Ids) > 0 {
client.sendMessage(queryusers)
}
// Set new groups and ACLs
} else {
// Get old temporary members
oldtmp := map[string]map[int]bool{}
for name, grp := range channel.ACL.Groups {
oldtmp[name] = grp.Temporary
}
// Clear current ACLs and groups
channel.ACL.ACLs = []acl.ACL{}
channel.ACL.Groups = map[string]acl.Group{}
// Add the received groups to the channel.
channel.ACL.InheritACL = *pacl.InheritAcls
for _, pbgrp := range pacl.Groups {
changroup := acl.EmptyGroupWithName(*pbgrp.Name)
changroup.Inherit = *pbgrp.Inherit
changroup.Inheritable = *pbgrp.Inheritable
for _, uid := range pbgrp.Add {
changroup.Add[int(uid)] = true
}
for _, uid := range pbgrp.Remove {
changroup.Remove[int(uid)] = true
}
if temp, ok := oldtmp[*pbgrp.Name]; ok {
changroup.Temporary = temp
}
channel.ACL.Groups[changroup.Name] = changroup
}
// Add the received ACLs to the channel.
for _, pbacl := range pacl.Acls {
chanacl := acl.ACL{}
chanacl.ApplyHere = *pbacl.ApplyHere
chanacl.ApplySubs = *pbacl.ApplySubs
if pbacl.UserId != nil {
chanacl.UserId = int(*pbacl.UserId)
} else {
chanacl.Group = *pbacl.Group
}
chanacl.Deny = acl.Permission(*pbacl.Deny & acl.AllPermissions)
chanacl.Allow = acl.Permission(*pbacl.Grant & acl.AllPermissions)
channel.ACL.ACLs = append(channel.ACL.ACLs, chanacl)
}
// Clear the Server's caches
server.ClearCaches()
// Regular user?
if !acl.HasPermission(&channel.ACL, client, acl.WritePermission) && client.IsRegistered() || client.HasCertificate() {
chanacl := acl.ACL{}
chanacl.ApplyHere = true
chanacl.ApplySubs = false
if client.IsRegistered() {
chanacl.UserId = client.UserId()
} else if client.HasCertificate() {
chanacl.Group = "$" + client.CertHash()
}
chanacl.Deny = acl.Permission(acl.NonePermission)
chanacl.Allow = acl.Permission(acl.WritePermission | acl.TraversePermission)
channel.ACL.ACLs = append(channel.ACL.ACLs, chanacl)
server.ClearCaches()
}
// Update freezer
server.UpdateFrozenChannelACLs(channel)
}
}