mirror of
https://github.com/ergochat/ergo.git
synced 2024-12-23 03:02:48 +01:00
358 lines
8.3 KiB
Go
358 lines
8.3 KiB
Go
// Copyright (c) 2012-2014 Jeremy Latt
|
|
// Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
|
|
// released under the MIT license
|
|
|
|
package irc
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/goshuirc/irc-go/ircmatch"
|
|
"github.com/oragono/oragono/irc/caps"
|
|
|
|
"sync"
|
|
)
|
|
|
|
// ExpandUserHost takes a userhost, and returns an expanded version.
|
|
func ExpandUserHost(userhost string) (expanded string) {
|
|
expanded = userhost
|
|
// fill in missing wildcards for nicks
|
|
//TODO(dan): this would fail with dan@lol, fix that.
|
|
if !strings.Contains(expanded, "!") {
|
|
expanded += "!*"
|
|
}
|
|
if !strings.Contains(expanded, "@") {
|
|
expanded += "@*"
|
|
}
|
|
return
|
|
}
|
|
|
|
// ClientManager keeps track of clients by nick, enforcing uniqueness of casefolded nicks
|
|
type ClientManager struct {
|
|
sync.RWMutex // tier 2
|
|
byNick map[string]*Client
|
|
}
|
|
|
|
// NewClientManager returns a new ClientManager.
|
|
func NewClientManager() *ClientManager {
|
|
return &ClientManager{
|
|
byNick: make(map[string]*Client),
|
|
}
|
|
}
|
|
|
|
// Count returns how many clients are in the manager.
|
|
func (clients *ClientManager) Count() int {
|
|
clients.RLock()
|
|
defer clients.RUnlock()
|
|
count := len(clients.byNick)
|
|
return count
|
|
}
|
|
|
|
// Get retrieves a client from the manager, if they exist.
|
|
func (clients *ClientManager) Get(nick string) *Client {
|
|
casefoldedName, err := CasefoldName(nick)
|
|
if err == nil {
|
|
clients.RLock()
|
|
defer clients.RUnlock()
|
|
cli := clients.byNick[casefoldedName]
|
|
return cli
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (clients *ClientManager) removeInternal(client *Client) (err error) {
|
|
// requires holding the writable Lock()
|
|
oldcfnick := client.NickCasefolded()
|
|
currentEntry, present := clients.byNick[oldcfnick]
|
|
if present {
|
|
if currentEntry == client {
|
|
delete(clients.byNick, oldcfnick)
|
|
} else {
|
|
// this shouldn't happen, but we can ignore it
|
|
client.server.logger.Warning("internal", "clients for nick out of sync", oldcfnick)
|
|
err = errNickMissing
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// Remove removes a client from the lookup set.
|
|
func (clients *ClientManager) Remove(client *Client) error {
|
|
clients.Lock()
|
|
defer clients.Unlock()
|
|
|
|
if !client.HasNick() {
|
|
return errNickMissing
|
|
}
|
|
return clients.removeInternal(client)
|
|
}
|
|
|
|
// Resume atomically replaces `oldClient` with `newClient`, updating
|
|
// newClient's data to match. It is the caller's responsibility first
|
|
// to verify that the resume is allowed, and then later to call oldClient.destroy().
|
|
func (clients *ClientManager) Resume(newClient, oldClient *Client) (err error) {
|
|
clients.Lock()
|
|
defer clients.Unlock()
|
|
|
|
// atomically grant the new client the old nick
|
|
err = clients.removeInternal(oldClient)
|
|
if err != nil {
|
|
// oldClient no longer owns its nick, fail out
|
|
return err
|
|
}
|
|
// nick has been reclaimed, grant it to the new client
|
|
clients.removeInternal(newClient)
|
|
clients.byNick[oldClient.NickCasefolded()] = newClient
|
|
|
|
newClient.copyResumeData(oldClient)
|
|
|
|
return nil
|
|
}
|
|
|
|
// SetNick sets a client's nickname, validating it against nicknames in use
|
|
func (clients *ClientManager) SetNick(client *Client, newNick string) error {
|
|
newcfnick, err := CasefoldName(newNick)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
reservedAccount, method := client.server.accounts.EnforcementStatus(newcfnick)
|
|
|
|
clients.Lock()
|
|
defer clients.Unlock()
|
|
|
|
currentNewEntry := clients.byNick[newcfnick]
|
|
// the client may just be changing case
|
|
if currentNewEntry != nil && currentNewEntry != client {
|
|
return errNicknameInUse
|
|
}
|
|
if method == NickReservationStrict && reservedAccount != "" && reservedAccount != client.Account() {
|
|
return errNicknameReserved
|
|
}
|
|
clients.removeInternal(client)
|
|
clients.byNick[newcfnick] = client
|
|
client.updateNickMask(newNick)
|
|
return nil
|
|
}
|
|
|
|
func (clients *ClientManager) AllClients() (result []*Client) {
|
|
clients.RLock()
|
|
defer clients.RUnlock()
|
|
result = make([]*Client, len(clients.byNick))
|
|
i := 0
|
|
for _, client := range clients.byNick {
|
|
result[i] = client
|
|
i++
|
|
}
|
|
return
|
|
}
|
|
|
|
// AllWithCaps returns all clients with the given capabilities.
|
|
func (clients *ClientManager) AllWithCaps(capabs ...caps.Capability) (set ClientSet) {
|
|
set = make(ClientSet)
|
|
|
|
clients.RLock()
|
|
defer clients.RUnlock()
|
|
var client *Client
|
|
for _, client = range clients.byNick {
|
|
// make sure they have all the required caps
|
|
for _, capab := range capabs {
|
|
if !client.capabilities.Has(capab) {
|
|
continue
|
|
}
|
|
}
|
|
|
|
set.Add(client)
|
|
}
|
|
|
|
return set
|
|
}
|
|
|
|
// FindAll returns all clients that match the given userhost mask.
|
|
func (clients *ClientManager) FindAll(userhost string) (set ClientSet) {
|
|
set = make(ClientSet)
|
|
|
|
userhost, err := Casefold(ExpandUserHost(userhost))
|
|
if err != nil {
|
|
return set
|
|
}
|
|
matcher := ircmatch.MakeMatch(userhost)
|
|
|
|
clients.RLock()
|
|
defer clients.RUnlock()
|
|
for _, client := range clients.byNick {
|
|
if matcher.Match(client.NickMaskCasefolded()) {
|
|
set.Add(client)
|
|
}
|
|
}
|
|
|
|
return set
|
|
}
|
|
|
|
// Find returns the first client that matches the given userhost mask.
|
|
func (clients *ClientManager) Find(userhost string) *Client {
|
|
userhost, err := Casefold(ExpandUserHost(userhost))
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
matcher := ircmatch.MakeMatch(userhost)
|
|
var matchedClient *Client
|
|
|
|
clients.RLock()
|
|
defer clients.RUnlock()
|
|
for _, client := range clients.byNick {
|
|
if matcher.Match(client.NickMaskCasefolded()) {
|
|
matchedClient = client
|
|
break
|
|
}
|
|
}
|
|
|
|
return matchedClient
|
|
}
|
|
|
|
//
|
|
// usermask to regexp
|
|
//
|
|
|
|
//TODO(dan): move this over to generally using glob syntax instead?
|
|
// kinda more expected in normal ban/etc masks, though regex is useful (probably as an extban?)
|
|
|
|
// UserMaskSet holds a set of client masks and lets you match hostnames to them.
|
|
type UserMaskSet struct {
|
|
sync.RWMutex
|
|
masks map[string]bool
|
|
regexp *regexp.Regexp
|
|
}
|
|
|
|
// NewUserMaskSet returns a new UserMaskSet.
|
|
func NewUserMaskSet() *UserMaskSet {
|
|
return &UserMaskSet{
|
|
masks: make(map[string]bool),
|
|
}
|
|
}
|
|
|
|
// Add adds the given mask to this set.
|
|
func (set *UserMaskSet) Add(mask string) (added bool) {
|
|
casefoldedMask, err := Casefold(mask)
|
|
if err != nil {
|
|
log.Println(fmt.Sprintf("ERROR: Could not add mask to usermaskset: [%s]", mask))
|
|
return false
|
|
}
|
|
|
|
set.Lock()
|
|
added = !set.masks[casefoldedMask]
|
|
if added {
|
|
set.masks[casefoldedMask] = true
|
|
}
|
|
set.Unlock()
|
|
|
|
if added {
|
|
set.setRegexp()
|
|
}
|
|
return
|
|
}
|
|
|
|
// AddAll adds the given masks to this set.
|
|
func (set *UserMaskSet) AddAll(masks []string) (added bool) {
|
|
set.Lock()
|
|
defer set.Unlock()
|
|
|
|
for _, mask := range masks {
|
|
if !added && !set.masks[mask] {
|
|
added = true
|
|
}
|
|
set.masks[mask] = true
|
|
}
|
|
if added {
|
|
set.setRegexp()
|
|
}
|
|
return
|
|
}
|
|
|
|
// Remove removes the given mask from this set.
|
|
func (set *UserMaskSet) Remove(mask string) (removed bool) {
|
|
set.Lock()
|
|
removed = set.masks[mask]
|
|
if removed {
|
|
delete(set.masks, mask)
|
|
}
|
|
set.Unlock()
|
|
|
|
if removed {
|
|
set.setRegexp()
|
|
}
|
|
return
|
|
}
|
|
|
|
// Match matches the given n!u@h.
|
|
func (set *UserMaskSet) Match(userhost string) bool {
|
|
set.RLock()
|
|
regexp := set.regexp
|
|
set.RUnlock()
|
|
|
|
if regexp == nil {
|
|
return false
|
|
}
|
|
return regexp.MatchString(userhost)
|
|
}
|
|
|
|
// String returns the masks in this set.
|
|
func (set *UserMaskSet) String() string {
|
|
set.RLock()
|
|
masks := make([]string, len(set.masks))
|
|
index := 0
|
|
for mask := range set.masks {
|
|
masks[index] = mask
|
|
index++
|
|
}
|
|
set.RUnlock()
|
|
return strings.Join(masks, " ")
|
|
}
|
|
|
|
func (set *UserMaskSet) Length() int {
|
|
set.RLock()
|
|
defer set.RUnlock()
|
|
return len(set.masks)
|
|
}
|
|
|
|
// setRegexp generates a regular expression from the set of user mask
|
|
// strings. Masks are split at the two types of wildcards, `*` and
|
|
// `?`. All the pieces are meta-escaped. `*` is replaced with `.*`,
|
|
// the regexp equivalent. Likewise, `?` is replaced with `.`. The
|
|
// parts are re-joined and finally all masks are joined into a big
|
|
// or-expression.
|
|
func (set *UserMaskSet) setRegexp() {
|
|
var re *regexp.Regexp
|
|
|
|
set.RLock()
|
|
maskExprs := make([]string, len(set.masks))
|
|
index := 0
|
|
for mask := range set.masks {
|
|
manyParts := strings.Split(mask, "*")
|
|
manyExprs := make([]string, len(manyParts))
|
|
for mindex, manyPart := range manyParts {
|
|
oneParts := strings.Split(manyPart, "?")
|
|
oneExprs := make([]string, len(oneParts))
|
|
for oindex, onePart := range oneParts {
|
|
oneExprs[oindex] = regexp.QuoteMeta(onePart)
|
|
}
|
|
manyExprs[mindex] = strings.Join(oneExprs, ".")
|
|
}
|
|
maskExprs[index] = strings.Join(manyExprs, ".*")
|
|
index++
|
|
}
|
|
set.RUnlock()
|
|
|
|
if index > 0 {
|
|
expr := "^" + strings.Join(maskExprs, "|") + "$"
|
|
re, _ = regexp.Compile(expr)
|
|
}
|
|
|
|
set.Lock()
|
|
set.regexp = re
|
|
set.Unlock()
|
|
}
|