forked from mumble-voip/grumble
/
murmurdb.go
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/
murmurdb.go
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// Copyright (c) 2011 The Grumble Authors
// The use of this source code is goverened by a BSD-style
// license that can be found in the LICENSE-file.
package main
// This file implements a Server that can be created from a Murmur SQLite file.
// This is read-only, so it's not generally useful. It's meant as a convenient
// way to import a Murmur server into Grumble, to be able to dump the structure of the
// SQLite datbase into a format that Grumble can understand.
import (
"database/sql"
"errors"
"log"
"mumbleapp.com/grumble/pkg/acl"
"mumbleapp.com/grumble/pkg/ban"
"net"
"os"
"path/filepath"
"strconv"
)
const (
ChannelInfoDescription int = iota
ChannelInfoPosition
)
const (
UserInfoName int = iota
UserInfoEmail
UserInfoComment
UserInfoHash
UserInfoPassword
UserInfoLastActive
)
const SQLiteSupport = true
// Import the structure of an existing Murmur SQLite database.
func MurmurImport(filename string) (err error) {
db, err := sql.Open("sqlite", filename)
if err != nil {
panic(err.Error())
}
rows, err := db.Query("SELECT server_id FROM servers")
if err != nil {
panic(err.Error())
}
var serverids []int64
var sid int64
for rows.Next() {
err = rows.Scan(&sid)
if err != nil {
return err
}
serverids = append(serverids, sid)
}
log.Printf("Found servers: %v (%v servers)", serverids, len(serverids))
for _, sid := range serverids {
m, err := NewServerFromSQLite(sid, db)
if err != nil {
return err
}
err = os.Mkdir(filepath.Join(Args.DataDir, strconv.FormatInt(sid, 10)), 0750)
if err != nil {
return err
}
err = m.FreezeToFile()
if err != nil {
return err
}
log.Printf("Successfully imported server %v", sid)
}
return
}
// Create a new Server from a Murmur SQLite database
func NewServerFromSQLite(id int64, db *sql.DB) (s *Server, err error) {
s, err = NewServer(id)
if err != nil {
return nil, err
}
err = populateChannelInfoFromDatabase(s, s.RootChannel(), db)
if err != nil {
return nil, err
}
err = populateChannelACLFromDatabase(s, s.RootChannel(), db)
if err != nil {
return nil, err
}
err = populateChannelGroupsFromDatabase(s, s.RootChannel(), db)
if err != nil {
return nil, err
}
err = populateChannelsFromDatabase(s, db, 0)
if err != nil {
return nil, err
}
err = populateChannelLinkInfo(s, db)
if err != nil {
return nil, err
}
err = populateUsers(s, db)
if err != nil {
return nil, err
}
err = populateBans(s, db)
if err != nil {
return nil, err
}
return
}
// Add channel metadata (channel_info table from SQLite) by reading the SQLite database.
func populateChannelInfoFromDatabase(server *Server, c *Channel, db *sql.DB) error {
stmt, err := db.Prepare("SELECT value FROM channel_info WHERE server_id=? AND channel_id=? AND key=?")
if err != nil {
return err
}
// Fetch description
rows, err := stmt.Query(server.Id, c.Id, ChannelInfoDescription)
if err != nil {
return err
}
for rows.Next() {
var description string
err = rows.Scan(&description)
if err != nil {
return err
}
if len(description) > 0 {
key, err := blobStore.Put([]byte(description))
if err != nil {
return err
}
c.DescriptionBlob = key
}
}
// Fetch position
rows, err = stmt.Query(server.Id, c.Id, ChannelInfoPosition)
if err != nil {
return err
}
for rows.Next() {
var pos int
if err := rows.Scan(&pos); err != nil {
return err
}
c.Position = pos
}
return nil
}
// Populate channel with its ACLs by reading the SQLite databse.
func populateChannelACLFromDatabase(server *Server, c *Channel, db *sql.DB) error {
stmt, err := db.Prepare("SELECT user_id, group_name, apply_here, apply_sub, grantpriv, revokepriv FROM acl WHERE server_id=? AND channel_id=? ORDER BY priority")
if err != nil {
return err
}
rows, err := stmt.Query(server.Id, c.Id)
if err != nil {
return err
}
for rows.Next() {
var (
UserId string
Group string
ApplyHere bool
ApplySub bool
Allow int64
Deny int64
)
if err := rows.Scan(&UserId, &Group, &ApplyHere, &ApplySub, &Allow, &Deny); err != nil {
return err
}
aclEntry := acl.ACL{}
aclEntry.ApplyHere = ApplyHere
aclEntry.ApplySubs = ApplySub
if len(UserId) > 0 {
aclEntry.UserId, err = strconv.Atoi(UserId)
if err != nil {
return err
}
} else if len(Group) > 0 {
aclEntry.Group = Group
} else {
return errors.New("Invalid ACL: Neither Group or UserId specified")
}
aclEntry.Deny = acl.Permission(Deny)
aclEntry.Allow = acl.Permission(Allow)
c.ACL.ACLs = append(c.ACL.ACLs, aclEntry)
}
return nil
}
// Populate channel with groups by reading the SQLite database.
func populateChannelGroupsFromDatabase(server *Server, c *Channel, db *sql.DB) error {
stmt, err := db.Prepare("SELECT group_id, name, inherit, inheritable FROM groups WHERE server_id=? AND channel_id=?")
if err != nil {
return err
}
rows, err := stmt.Query(server.Id, c.Id)
if err != nil {
return err
}
groups := make(map[int64]acl.Group)
for rows.Next() {
var (
GroupId int64
Name string
Inherit bool
Inheritable bool
)
if err := rows.Scan(&GroupId, &Name, &Inherit, &Inheritable); err != nil {
return err
}
g := acl.EmptyGroupWithName(Name)
g.Inherit = Inherit
g.Inheritable = Inheritable
c.ACL.Groups[g.Name] = g
groups[GroupId] = g
}
stmt, err = db.Prepare("SELECT user_id, addit FROM group_members WHERE server_id=? AND group_id=?")
if err != nil {
return err
}
for gid, grp := range groups {
rows, err = stmt.Query(server.Id, gid)
if err != nil {
return err
}
for rows.Next() {
var (
UserId int64
Add bool
)
if err := rows.Scan(&UserId, &Add); err != nil {
return err
}
if Add {
grp.Add[int(UserId)] = true
} else {
grp.Remove[int(UserId)] = true
}
}
}
return nil
}
// Populate the Server with Channels from the database.
func populateChannelsFromDatabase(server *Server, db *sql.DB, parentId int) error {
parent, exists := server.Channels[parentId]
if !exists {
return errors.New("Non-existant parent")
}
stmt, err := db.Prepare("SELECT channel_id, name, inheritacl FROM channels WHERE server_id=? AND parent_id=?")
if err != nil {
return err
}
rows, err := stmt.Query(server.Id, parentId)
if err != nil {
return err
}
for rows.Next() {
var (
name string
chanid int
inherit bool
)
err = rows.Scan(&chanid, &name, &inherit)
if err != nil {
return err
}
c := NewChannel(chanid, name)
server.Channels[c.Id] = c
c.ACL.InheritACL = inherit
parent.AddChild(c)
}
// Add channel_info
for _, c := range parent.children {
err = populateChannelInfoFromDatabase(server, c, db)
if err != nil {
return err
}
}
// Add ACLs
for _, c := range parent.children {
err = populateChannelACLFromDatabase(server, c, db)
if err != nil {
return err
}
}
// Add groups
for _, c := range parent.children {
err = populateChannelGroupsFromDatabase(server, c, db)
if err != nil {
return err
}
}
// Add subchannels
for id, _ := range parent.children {
err = populateChannelsFromDatabase(server, db, id)
if err != nil {
return err
}
}
return nil
}
// Link a Server's channels together
func populateChannelLinkInfo(server *Server, db *sql.DB) (err error) {
stmt, err := db.Prepare("SELECT channel_id, link_id FROM channel_links WHERE server_id=?")
if err != nil {
return err
}
rows, err := stmt.Query(server.Id)
if err != nil {
return err
}
for rows.Next() {
var (
ChannelId int
LinkId int
)
if err := rows.Scan(&ChannelId, &LinkId); err != nil {
return err
}
channel, exists := server.Channels[ChannelId]
if !exists {
return errors.New("Attempt to perform link operation on non-existant channel.")
}
other, exists := server.Channels[LinkId]
if !exists {
return errors.New("Attempt to perform link operation on non-existant channel.")
}
server.LinkChannels(channel, other)
}
return nil
}
func populateUsers(server *Server, db *sql.DB) (err error) {
// Populate the server with regular user data
stmt, err := db.Prepare("SELECT user_id, name, pw, lastchannel, texture, strftime('%s', last_active) FROM users WHERE server_id=?")
if err != nil {
return
}
rows, err := stmt.Query(server.Id)
if err != nil {
return
}
for rows.Next() {
var (
UserId int64
UserName string
SHA1Password string
LastChannel int
Texture []byte
LastActive int64
)
err = rows.Scan(&UserId, &UserName, &SHA1Password, &LastChannel, &Texture, &LastActive)
if err != nil {
continue
}
if UserId == 0 {
server.cfg.Set("SuperUserPassword", "sha1$$"+SHA1Password)
}
user, err := NewUser(uint32(UserId), UserName)
if err != nil {
return err
}
if len(Texture) > 0 {
key, err := blobStore.Put(Texture)
if err != nil {
return err
}
user.TextureBlob = key
}
user.LastActive = uint64(LastActive)
user.LastChannelId = LastChannel
server.Users[user.Id] = user
}
stmt, err = db.Prepare("SELECT key, value FROM user_info WHERE server_id=? AND user_id=?")
if err != nil {
return
}
// Populate users with any new-style UserInfo records
for uid, user := range server.Users {
rows, err = stmt.Query(server.Id, uid)
if err != nil {
return err
}
for rows.Next() {
var (
Key int
Value string
)
err = rows.Scan(&Key, &Value)
if err != nil {
return err
}
switch Key {
case UserInfoEmail:
user.Email = Value
case UserInfoComment:
key, err := blobStore.Put([]byte(Value))
if err != nil {
return err
}
user.CommentBlob = key
case UserInfoHash:
user.CertHash = Value
case UserInfoLastActive:
// not a kv-pair (trigger)
case UserInfoPassword:
// not a kv-pair
case UserInfoName:
// not a kv-pair
}
}
}
return
}
// Populate bans
func populateBans(server *Server, db *sql.DB) (err error) {
stmt, err := db.Prepare("SELECT base, mask, name, hash, reason, start, duration FROM bans WHERE server_id=?")
if err != nil {
return
}
rows, err := stmt.Query(server.Id)
if err != nil {
return err
}
for rows.Next() {
var (
Ban ban.Ban
IP []byte
StartDate string
Duration int64
)
err = rows.Scan(&IP, &Ban.Mask, &Ban.Username, &Ban.CertHash, &Ban.Reason, &StartDate, &Duration)
if err != nil {
return err
}
if len(IP) == 16 && IP[10] == 0xff && IP[11] == 0xff {
Ban.IP = net.IPv4(IP[12], IP[13], IP[14], IP[15])
} else {
Ban.IP = IP
}
Ban.SetISOStartDate(StartDate)
Ban.Duration = uint32(Duration)
server.Bans = append(server.Bans, Ban)
}
return
}