mirror of
https://github.com/ergochat/ergo.git
synced 2024-11-24 21:09:30 +01:00
4bffdba610
Reported by @Mikaela; normally this requires +o or higher on the channel that is the target of the forward, but SAMODE should bypass this check.
432 lines
14 KiB
Go
432 lines
14 KiB
Go
// Copyright (c) 2012-2014 Jeremy Latt
|
|
// Copyright (c) 2014-2015 Edmund Huber
|
|
// Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
|
|
// released under the MIT license
|
|
|
|
package irc
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/ergochat/ergo/irc/modes"
|
|
"github.com/ergochat/ergo/irc/sno"
|
|
"github.com/ergochat/ergo/irc/utils"
|
|
)
|
|
|
|
var (
|
|
// DefaultChannelModes are enabled on brand new channels when they're created.
|
|
// this can be overridden in the `channels` config, with the `default-modes` key
|
|
DefaultChannelModes = modes.Modes{
|
|
modes.NoOutside, modes.OpOnlyTopic,
|
|
}
|
|
|
|
// DefaultUserModes are set on all users when they login.
|
|
// this can be overridden in the `accounts` config, with the `default-user-modes` key
|
|
DefaultUserModes = modes.Modes{}
|
|
)
|
|
|
|
// ApplyUserModeChanges applies the given changes, and returns the applied changes.
|
|
// `oper` is the operclass of the client gaining +o, when applicable (this is just
|
|
// to confirm that the client actually has a valid operclass)
|
|
func ApplyUserModeChanges(client *Client, changes modes.ModeChanges, force bool, oper *Oper) modes.ModeChanges {
|
|
applied := make(modes.ModeChanges, 0)
|
|
// #1617: if the user is offline, they are not counted in LUSERS,
|
|
// so don't modify the LUSERS stats for +i or +o.
|
|
present := len(client.Sessions()) != 0
|
|
|
|
for _, change := range changes {
|
|
if change.Mode != modes.ServerNotice {
|
|
switch change.Op {
|
|
case modes.Add:
|
|
if (change.Mode == modes.Operator) && !(force && oper != nil) {
|
|
continue
|
|
}
|
|
|
|
if client.SetMode(change.Mode, true) {
|
|
if change.Mode == modes.Invisible && present {
|
|
client.server.stats.ChangeInvisible(1)
|
|
} else if change.Mode == modes.Operator && present {
|
|
client.server.stats.ChangeOperators(1)
|
|
}
|
|
applied = append(applied, change)
|
|
}
|
|
|
|
case modes.Remove:
|
|
var removedSnomasks string
|
|
if client.SetMode(change.Mode, false) {
|
|
if change.Mode == modes.Invisible && present {
|
|
client.server.stats.ChangeInvisible(-1)
|
|
} else if change.Mode == modes.Operator {
|
|
removedSnomasks = client.server.snomasks.String(client)
|
|
if present {
|
|
client.server.stats.ChangeOperators(-1)
|
|
}
|
|
applyOper(client, nil, nil)
|
|
if removedSnomasks != "" {
|
|
client.server.snomasks.RemoveClient(client)
|
|
}
|
|
}
|
|
applied = append(applied, change)
|
|
if removedSnomasks != "" {
|
|
applied = append(applied, modes.ModeChange{
|
|
Mode: modes.ServerNotice,
|
|
Op: modes.Remove,
|
|
Arg: removedSnomasks,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
// server notices are weird
|
|
if !client.HasMode(modes.Operator) || change.Op == modes.List {
|
|
continue
|
|
}
|
|
|
|
currentMasks := client.server.snomasks.MasksEnabled(client)
|
|
addMasks, removeMasks, newArg := sno.EvaluateSnomaskChanges(change.Op == modes.Add, change.Arg, currentMasks)
|
|
|
|
success := false
|
|
if len(addMasks) != 0 {
|
|
oper := client.Oper()
|
|
// #1176: require special operator privileges to subscribe to snomasks
|
|
if force || oper.HasRoleCapab("snomasks") || oper.HasRoleCapab("ban") {
|
|
success = true
|
|
client.server.snomasks.AddMasks(client, addMasks...)
|
|
}
|
|
}
|
|
if len(removeMasks) != 0 {
|
|
success = true
|
|
client.server.snomasks.RemoveMasks(client, removeMasks...)
|
|
}
|
|
if success {
|
|
change.Arg = newArg
|
|
applied = append(applied, change)
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(applied) != 0 {
|
|
client.markDirty(IncludeUserModes)
|
|
}
|
|
|
|
// return the changes we could actually apply
|
|
return applied
|
|
}
|
|
|
|
// parseDefaultModes uses the provided mode change parser to parse the rawModes.
|
|
func parseDefaultModes(rawModes string, parser func(params ...string) (modes.ModeChanges, map[rune]bool)) modes.Modes {
|
|
modeChangeStrings := strings.Fields(rawModes)
|
|
modeChanges, _ := parser(modeChangeStrings...)
|
|
defaultModes := make(modes.Modes, 0)
|
|
for _, modeChange := range modeChanges {
|
|
if modeChange.Op == modes.Add {
|
|
defaultModes = append(defaultModes, modeChange.Mode)
|
|
}
|
|
}
|
|
return defaultModes
|
|
}
|
|
|
|
// ParseDefaultChannelModes parses the `default-modes` line of the config
|
|
func ParseDefaultChannelModes(rawModes *string) modes.Modes {
|
|
if rawModes == nil {
|
|
// not present in config, fall back to compile-time default
|
|
return DefaultChannelModes
|
|
}
|
|
return parseDefaultModes(*rawModes, modes.ParseChannelModeChanges)
|
|
}
|
|
|
|
// ParseDefaultUserModes parses the `default-user-modes` line of the config
|
|
func ParseDefaultUserModes(rawModes *string) modes.Modes {
|
|
if rawModes == nil {
|
|
// not present in config, fall back to compile-time default
|
|
return DefaultUserModes
|
|
}
|
|
return parseDefaultModes(*rawModes, modes.ParseUserModeChanges)
|
|
}
|
|
|
|
// #1021: channel key must be valid as a non-final parameter
|
|
func validateChannelKey(key string) bool {
|
|
return key != "" && key[0] != ':' && strings.IndexByte(key, ' ') == -1
|
|
}
|
|
|
|
// ApplyChannelModeChanges applies a given set of mode changes.
|
|
func (channel *Channel) ApplyChannelModeChanges(client *Client, isSamode bool, changes modes.ModeChanges, rb *ResponseBuffer) (applied modes.ModeChanges) {
|
|
// so we only output one warning for each list type when full
|
|
listFullWarned := make(map[modes.Mode]bool)
|
|
|
|
var alreadySentPrivError bool
|
|
|
|
maskOpCount := 0
|
|
chname := channel.Name()
|
|
details := client.Details()
|
|
|
|
hasPrivs := func(change modes.ModeChange) bool {
|
|
if isSamode {
|
|
return true
|
|
}
|
|
if details.account != "" && details.account == channel.Founder() {
|
|
return true
|
|
}
|
|
switch change.Mode {
|
|
case modes.ChannelFounder, modes.ChannelAdmin, modes.ChannelOperator, modes.Halfop, modes.Voice:
|
|
// List on these modes is a no-op anyway
|
|
if change.Op == modes.List {
|
|
return true
|
|
}
|
|
cfarg, _ := CasefoldName(change.Arg)
|
|
isSelfChange := cfarg == details.nickCasefolded
|
|
if change.Op == modes.Remove && isSelfChange {
|
|
// "There is no restriction, however, on anyone `deopping' themselves"
|
|
// <https://tools.ietf.org/html/rfc2812#section-3.1.5>
|
|
return true
|
|
}
|
|
return channelUserModeHasPrivsOver(channel.HighestUserMode(client), change.Mode)
|
|
case modes.InviteMask, modes.ExceptMask:
|
|
// listing these requires privileges
|
|
return channel.ClientIsAtLeast(client, modes.ChannelOperator)
|
|
default:
|
|
// #163: allow unprivileged users to list ban masks, and any other modes
|
|
return change.Op == modes.List || channel.ClientIsAtLeast(client, modes.ChannelOperator)
|
|
}
|
|
}
|
|
|
|
for _, change := range changes {
|
|
if !hasPrivs(change) {
|
|
if !alreadySentPrivError {
|
|
alreadySentPrivError = true
|
|
rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, details.nick, channel.name, client.t("You're not a channel operator"))
|
|
}
|
|
continue
|
|
}
|
|
|
|
switch change.Mode {
|
|
case modes.BanMask, modes.ExceptMask, modes.InviteMask:
|
|
maskOpCount += 1
|
|
if change.Op == modes.List {
|
|
channel.ShowMaskList(client, change.Mode, rb)
|
|
continue
|
|
}
|
|
|
|
mask := change.Arg
|
|
switch change.Op {
|
|
case modes.Add:
|
|
if channel.lists[change.Mode].Length() >= client.server.Config().Limits.ChanListModes {
|
|
if !listFullWarned[change.Mode] {
|
|
rb.Add(nil, client.server.name, ERR_BANLISTFULL, details.nick, chname, change.Mode.String(), client.t("Channel list is full"))
|
|
listFullWarned[change.Mode] = true
|
|
}
|
|
continue
|
|
}
|
|
|
|
maskAdded, err := channel.lists[change.Mode].Add(mask, details.nickMask, details.accountName)
|
|
if maskAdded != "" {
|
|
appliedChange := change
|
|
appliedChange.Arg = maskAdded
|
|
applied = append(applied, appliedChange)
|
|
} else if err != nil {
|
|
rb.Add(nil, client.server.name, ERR_INVALIDMODEPARAM, details.nick, chname, string(change.Mode), utils.SafeErrorParam(mask), fmt.Sprintf(client.t("Invalid mode %[1]s parameter: %[2]s"), string(change.Mode), mask))
|
|
} else {
|
|
rb.Add(nil, client.server.name, ERR_LISTMODEALREADYSET, details.nick, chname, mask, string(change.Mode), fmt.Sprintf(client.t("Channel %[1]s list already contains %[2]s"), chname, mask))
|
|
}
|
|
|
|
case modes.Remove:
|
|
maskRemoved, err := channel.lists[change.Mode].Remove(mask)
|
|
if maskRemoved != "" {
|
|
appliedChange := change
|
|
appliedChange.Arg = maskRemoved
|
|
applied = append(applied, appliedChange)
|
|
} else if err != nil {
|
|
rb.Add(nil, client.server.name, ERR_INVALIDMODEPARAM, details.nick, chname, string(change.Mode), utils.SafeErrorParam(mask), fmt.Sprintf(client.t("Invalid mode %[1]s parameter: %[2]s"), string(change.Mode), mask))
|
|
} else {
|
|
rb.Add(nil, client.server.name, ERR_LISTMODENOTSET, details.nick, chname, mask, string(change.Mode), fmt.Sprintf(client.t("Channel %[1]s list does not contain %[2]s"), chname, mask))
|
|
}
|
|
}
|
|
|
|
case modes.UserLimit:
|
|
switch change.Op {
|
|
case modes.Add:
|
|
val, err := strconv.Atoi(change.Arg)
|
|
if err == nil {
|
|
channel.setUserLimit(val)
|
|
applied = append(applied, change)
|
|
}
|
|
|
|
case modes.Remove:
|
|
channel.setUserLimit(0)
|
|
applied = append(applied, change)
|
|
}
|
|
|
|
case modes.Forward:
|
|
switch change.Op {
|
|
case modes.Add:
|
|
ch := client.server.channels.Get(change.Arg)
|
|
if ch == nil {
|
|
rb.Add(nil, client.server.name, ERR_INVALIDMODEPARAM, details.nick, chname, string(change.Mode), utils.SafeErrorParam(change.Arg), fmt.Sprintf(client.t("No such channel")))
|
|
} else if ch == channel {
|
|
rb.Add(nil, client.server.name, ERR_INVALIDMODEPARAM, details.nick, chname, string(change.Mode), utils.SafeErrorParam(change.Arg), fmt.Sprintf(client.t("You can't forward a channel to itself")))
|
|
} else {
|
|
if isSamode || ch.ClientIsAtLeast(client, modes.ChannelOperator) {
|
|
change.Arg = ch.Name()
|
|
channel.setForward(change.Arg)
|
|
applied = append(applied, change)
|
|
} else {
|
|
rb.Add(nil, client.server.name, ERR_CHANOPRIVSNEEDED, details.nick, ch.Name(), client.t("You must be a channel operator in the channel you are forwarding to"))
|
|
}
|
|
}
|
|
case modes.Remove:
|
|
channel.setForward("")
|
|
applied = append(applied, change)
|
|
}
|
|
|
|
case modes.Key:
|
|
switch change.Op {
|
|
case modes.Add:
|
|
if validateChannelKey(change.Arg) {
|
|
channel.setKey(change.Arg)
|
|
applied = append(applied, change)
|
|
} else {
|
|
rb.Add(nil, client.server.name, ERR_INVALIDMODEPARAM, details.nick, chname, string(change.Mode), utils.SafeErrorParam(change.Arg), fmt.Sprintf(client.t("Invalid mode %[1]s parameter: %[2]s"), string(change.Mode), change.Arg))
|
|
}
|
|
case modes.Remove:
|
|
channel.setKey("")
|
|
applied = append(applied, change)
|
|
}
|
|
|
|
case modes.ChannelFounder, modes.ChannelAdmin, modes.ChannelOperator, modes.Halfop, modes.Voice:
|
|
if change.Op == modes.List {
|
|
continue
|
|
}
|
|
|
|
nick := change.Arg
|
|
if nick == "" {
|
|
rb.Add(nil, client.server.name, ERR_NEEDMOREPARAMS, client.Nick(), "MODE", client.t("Not enough parameters"))
|
|
continue
|
|
}
|
|
|
|
success, change := channel.applyModeToMember(client, change, rb)
|
|
if success {
|
|
applied = append(applied, change)
|
|
}
|
|
|
|
default:
|
|
// all channel modes with no args, e.g., InviteOnly, Secret
|
|
if change.Op == modes.List {
|
|
continue
|
|
}
|
|
|
|
if channel.flags.SetMode(change.Mode, change.Op == modes.Add) {
|
|
applied = append(applied, change)
|
|
}
|
|
}
|
|
}
|
|
|
|
var includeFlags uint
|
|
for _, change := range applied {
|
|
switch change.Mode {
|
|
case modes.BanMask, modes.ExceptMask, modes.InviteMask:
|
|
includeFlags |= IncludeLists
|
|
case modes.ChannelFounder, modes.ChannelAdmin, modes.ChannelOperator, modes.Halfop, modes.Voice:
|
|
// these are persisted on the client object, via (*Channel).applyModeToMember
|
|
default:
|
|
includeFlags |= IncludeModes
|
|
}
|
|
}
|
|
if includeFlags != 0 {
|
|
channel.MarkDirty(includeFlags)
|
|
}
|
|
|
|
// #649: don't send 324 RPL_CHANNELMODEIS if we were only working with mask lists
|
|
if len(applied) == 0 && !alreadySentPrivError && (maskOpCount == 0 || maskOpCount < len(changes)) {
|
|
args := append([]string{details.nick, chname}, channel.modeStrings(client)...)
|
|
rb.Add(nil, client.server.name, RPL_CHANNELMODEIS, args...)
|
|
rb.Add(nil, client.server.name, RPL_CREATIONTIME, details.nick, chname, strconv.FormatInt(channel.createdTime.Unix(), 10))
|
|
}
|
|
|
|
return applied
|
|
}
|
|
|
|
// tests whether l > r, in the channel-user mode ordering (e.g., Halfop > Voice)
|
|
func umodeGreaterThan(l modes.Mode, r modes.Mode) bool {
|
|
for _, mode := range modes.ChannelUserModes {
|
|
if l == mode && r != mode {
|
|
return true
|
|
} else if r == mode {
|
|
return false
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// ProcessAccountToUmodeChange processes Add/Remove/List operations for channel persistent usermodes.
|
|
func (channel *Channel) ProcessAccountToUmodeChange(client *Client, change modes.ModeChange) (results []modes.ModeChange, err error) {
|
|
changed := false
|
|
defer func() {
|
|
if changed {
|
|
channel.MarkDirty(IncludeLists)
|
|
}
|
|
}()
|
|
|
|
account := client.Account()
|
|
isOperChange := client.HasRoleCapabs("chanreg")
|
|
|
|
channel.stateMutex.Lock()
|
|
defer channel.stateMutex.Unlock()
|
|
|
|
clientMode := channel.accountToUMode[account]
|
|
targetModeNow := channel.accountToUMode[change.Arg]
|
|
var targetModeAfter modes.Mode
|
|
if change.Op == modes.Add {
|
|
targetModeAfter = change.Mode
|
|
}
|
|
|
|
// server operators and founders can do anything:
|
|
hasPrivs := isOperChange || (account != "" && account == channel.registeredFounder)
|
|
// halfop and up can list:
|
|
if change.Op == modes.List && (clientMode == modes.Halfop || umodeGreaterThan(clientMode, modes.Halfop)) {
|
|
hasPrivs = true
|
|
// you can do adds or removes at levels you have "privileges over":
|
|
} else if channelUserModeHasPrivsOver(clientMode, targetModeNow) && channelUserModeHasPrivsOver(clientMode, targetModeAfter) {
|
|
hasPrivs = true
|
|
// and you can always de-op yourself:
|
|
} else if change.Op == modes.Remove && account == change.Arg {
|
|
hasPrivs = true
|
|
}
|
|
if !hasPrivs {
|
|
return nil, errInsufficientPrivs
|
|
}
|
|
|
|
switch change.Op {
|
|
case modes.Add:
|
|
if targetModeNow != targetModeAfter {
|
|
channel.accountToUMode[change.Arg] = change.Mode
|
|
changed = true
|
|
return []modes.ModeChange{change}, nil
|
|
}
|
|
return nil, nil
|
|
case modes.Remove:
|
|
if targetModeNow == change.Mode {
|
|
delete(channel.accountToUMode, change.Arg)
|
|
changed = true
|
|
return []modes.ModeChange{change}, nil
|
|
}
|
|
return nil, nil
|
|
case modes.List:
|
|
result := make([]modes.ModeChange, len(channel.accountToUMode))
|
|
pos := 0
|
|
for account, mode := range channel.accountToUMode {
|
|
result[pos] = modes.ModeChange{
|
|
Mode: mode,
|
|
Arg: account,
|
|
Op: modes.Add,
|
|
}
|
|
pos++
|
|
}
|
|
return result, nil
|
|
default:
|
|
// shouldn't happen
|
|
return nil, errInvalidCharacter
|
|
}
|
|
}
|