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Fixing rate limit checking to only ping after a success. Fixes #516

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This commit is contained in:
Dessalines 2020-02-06 16:07:59 -05:00
parent 898ea8d3ca
commit 1369ad1fbc
4 changed files with 103 additions and 56 deletions
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14
README.md vendored
View File

@ -131,18 +131,18 @@ If you'd like to add translations, take a look at the [English translation file]
lang | done | missing
---- | ---- | -------
ca | 98% | cross_posted_to,old,support_on_liberapay,time,action
de | 86% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,old,docs,message_sent,messages,old_password,matrix_user_id,private_message_disclaimer,send_notifications_to_email,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,support_on_liberapay,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
de | 86% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,old,docs,message_sent,messages,old_password,matrix_user_id,private_message_disclaimer,send_notifications_to_email,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
fa | 72% | cross_post,cross_posted_to,subscribed_to_communities,trending_communities,create_private_message,send_secure_message,send_message,message,mod,mods,moderates,remove_as_mod,appoint_as_mod,modlog,stickied,ban,ban_from_site,unban,unban_from_site,banned,number_of_subscribers,subscribers,both,saved,unsubscribe,subscribe,subscribed,old,api,docs,inbox,inbox_for,message_sent,notifications_error,messages,no_email_setup,matrix_user_id,private_message_disclaimer,url,body,copy_suggested_title,community,expand_here,subscribe_to_communities,theme,sponsor_message,support_on_liberapay,general_sponsors,joined,by,to,from,landing_0,logged_in,community_moderator_already_exists,community_follower_already_exists,community_user_already_banned,no_slurs,admin_already_created,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
eo | 74% | cross_posted_to,number_of_communities,create_private_message,send_secure_message,send_message,message,preview,upload_image,avatar,upload_avatar,show_avatars,formatting_help,view_source,sticky,unsticky,archive_link,stickied,delete_account,delete_account_confirm,banned,creator,number_online,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,theme,support_on_liberapay,donate_to_lemmy,donate,from,are_you_sure,yes,no,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
es | 99% | cross_posted_to,support_on_liberapay
es | 100% | cross_posted_to
fi | 98% | cross_posted_to,old,support_on_liberapay,time,action
fr | 81% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,archive_link,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,support_on_liberapay,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
it | 82% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,archive_link,old,docs,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,support_on_liberapay,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
nl | 98% | cross_posted_to,support_on_liberapay,time,action
pt-br | 100% | support_on_liberapay
fr | 82% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,archive_link,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
it | 83% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,archive_link,old,docs,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
nl | 99% | cross_posted_to,time,action
pt-br | 100% |
ru | 70% | cross_posts,cross_post,cross_posted_to,number_of_communities,create_private_message,send_secure_message,send_message,message,preview,upload_image,avatar,upload_avatar,show_avatars,formatting_help,view_source,sticky,unsticky,archive_link,stickied,delete_account,delete_account_confirm,banned,creator,number_online,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,recent_comments,theme,support_on_liberapay,donate_to_lemmy,donate,monero,by,to,from,transfer_community,transfer_site,are_you_sure,yes,no,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
sv | 81% | cross_posted_to,create_private_message,send_secure_message,send_message,message,avatar,upload_avatar,show_avatars,archive_link,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,support_on_liberapay,donate_to_lemmy,donate,from,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
zh | 69% | cross_posts,cross_post,cross_posted_to,users,number_of_communities,create_private_message,send_secure_message,send_message,message,preview,upload_image,avatar,upload_avatar,show_avatars,formatting_help,view_source,sticky,unsticky,archive_link,settings,stickied,delete_account,delete_account_confirm,banned,creator,number_online,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,recent_comments,nsfw,show_nsfw,theme,support_on_liberapay,donate_to_lemmy,donate,monero,by,to,from,transfer_community,transfer_site,are_you_sure,yes,no,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
zh | 69% | cross_posts,cross_post,cross_posted_to,users,number_of_communities,create_private_message,send_secure_message,send_message,message,preview,upload_image,avatar,upload_avatar,show_avatars,formatting_help,view_source,sticky,unsticky,archive_link,settings,stickied,delete_account,delete_account_confirm,banned,creator,number_online,old,docs,replies,mentions,message_sent,messages,old_password,forgot_password,reset_password_mail_sent,password_change,new_password,no_email_setup,matrix_user_id,private_message_disclaimer,send_notifications_to_email,language,browser_default,downvotes_disabled,enable_downvotes,open_registration,registration_closed,enable_nsfw,recent_comments,nsfw,show_nsfw,theme,donate_to_lemmy,donate,monero,by,to,from,transfer_community,transfer_site,are_you_sure,yes,no,logged_in,email_already_exists,couldnt_create_private_message,no_private_message_edit_allowed,couldnt_update_private_message,time,action
<!-- translationsstop -->
If you'd like to update this report, run:

2
docker/lemmy.hjson vendored
View File

@ -29,7 +29,7 @@
# rate limits for various user actions, by user ip
rate_limit: {
# maximum number of messages created in interval
message: 30
message: 180
# interval length for message limit
message_per_second: 60
# maximum number of posts created in interval

2
server/config/defaults.hjson vendored
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@ -30,7 +30,7 @@
# rate limits for various user actions, by user ip
rate_limit: {
# maximum number of messages created in interval
message: 30
message: 180
# interval length for message limit
message_per_second: 60
# maximum number of posts created in interval

141
server/src/websocket/server.rs
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@ -12,6 +12,7 @@ use serde_json::Value;
use std::collections::{HashMap, HashSet};
use std::str::FromStr;
use std::time::SystemTime;
use strum::IntoEnumIterator;
use crate::api::comment::*;
use crate::api::community::*;
@ -71,6 +72,13 @@ pub struct SessionInfo {
pub ip: IPAddr,
}
#[derive(Eq, PartialEq, Hash, Debug, EnumIter, Copy, Clone)]
pub enum RateLimitType {
Message,
Register,
Post,
}
/// `ChatServer` manages chat rooms and responsible for coordinating chat
/// session.
pub struct ChatServer {
@ -87,8 +95,8 @@ pub struct ChatServer {
/// sessions (IE clients)
user_rooms: HashMap<UserId, HashSet<ConnectionId>>,
/// Rate limiting based on IP addr
rate_limits: HashMap<IPAddr, RateLimitBucket>,
/// Rate limiting based on rate type and IP addr
rate_limit_buckets: HashMap<RateLimitType, HashMap<IPAddr, RateLimitBucket>>,
rng: ThreadRng,
db: Pool<ConnectionManager<PgConnection>>,
@ -98,7 +106,7 @@ impl ChatServer {
pub fn startup(db: Pool<ConnectionManager<PgConnection>>) -> ChatServer {
ChatServer {
sessions: HashMap::new(),
rate_limits: HashMap::new(),
rate_limit_buckets: HashMap::new(),
post_rooms: HashMap::new(),
community_rooms: HashMap::new(),
user_rooms: HashMap::new(),
@ -259,60 +267,82 @@ impl ChatServer {
to_json_string(&user_operation, post)
}
fn check_rate_limit_register(&mut self, id: usize) -> Result<(), Error> {
fn check_rate_limit_register(&mut self, id: usize, check_only: bool) -> Result<(), Error> {
self.check_rate_limit_full(
RateLimitType::Register,
id,
Settings::get().rate_limit.register,
Settings::get().rate_limit.register_per_second,
check_only,
)
}
fn check_rate_limit_post(&mut self, id: usize) -> Result<(), Error> {
fn check_rate_limit_post(&mut self, id: usize, check_only: bool) -> Result<(), Error> {
self.check_rate_limit_full(
RateLimitType::Post,
id,
Settings::get().rate_limit.post,
Settings::get().rate_limit.post_per_second,
check_only,
)
}
fn check_rate_limit_message(&mut self, id: usize) -> Result<(), Error> {
fn check_rate_limit_message(&mut self, id: usize, check_only: bool) -> Result<(), Error> {
self.check_rate_limit_full(
RateLimitType::Message,
id,
Settings::get().rate_limit.message,
Settings::get().rate_limit.message_per_second,
check_only,
)
}
#[allow(clippy::float_cmp)]
fn check_rate_limit_full(&mut self, id: usize, rate: i32, per: i32) -> Result<(), Error> {
fn check_rate_limit_full(
&mut self,
type_: RateLimitType,
id: usize,
rate: i32,
per: i32,
check_only: bool,
) -> Result<(), Error> {
if let Some(info) = self.sessions.get(&id) {
if let Some(rate_limit) = self.rate_limits.get_mut(&info.ip) {
// The initial value
if rate_limit.allowance == -2f64 {
rate_limit.allowance = rate as f64;
};
if let Some(bucket) = self.rate_limit_buckets.get_mut(&type_) {
if let Some(rate_limit) = bucket.get_mut(&info.ip) {
let current = SystemTime::now();
let time_passed = current.duration_since(rate_limit.last_checked)?.as_secs() as f64;
let current = SystemTime::now();
let time_passed = current.duration_since(rate_limit.last_checked)?.as_secs() as f64;
rate_limit.last_checked = current;
rate_limit.allowance += time_passed * (rate as f64 / per as f64);
if rate_limit.allowance > rate as f64 {
rate_limit.allowance = rate as f64;
}
// The initial value
if rate_limit.allowance == -2f64 {
rate_limit.allowance = rate as f64;
};
if rate_limit.allowance < 1.0 {
println!(
"Rate limited IP: {}, time_passed: {}, allowance: {}",
&info.ip, time_passed, rate_limit.allowance
);
Err(
APIError {
message: format!("Too many requests. {} per {} seconds", rate, per),
rate_limit.last_checked = current;
if !check_only {
rate_limit.allowance += time_passed * (rate as f64 / per as f64);
if rate_limit.allowance > rate as f64 {
rate_limit.allowance = rate as f64;
}
.into(),
)
}
if rate_limit.allowance < 1.0 {
println!(
"Rate limited IP: {}, time_passed: {}, allowance: {}",
&info.ip, time_passed, rate_limit.allowance
);
Err(
APIError {
message: format!("Too many requests. {} per {} seconds", rate, per),
}
.into(),
)
} else {
if !check_only {
rate_limit.allowance -= 1.0;
}
Ok(())
}
} else {
rate_limit.allowance -= 1.0;
Ok(())
}
} else {
@ -350,14 +380,24 @@ impl Handler<Connect> for ChatServer {
},
);
if self.rate_limits.get(&msg.ip).is_none() {
self.rate_limits.insert(
msg.ip,
RateLimitBucket {
last_checked: SystemTime::now(),
allowance: -2f64,
},
);
for rate_limit_type in RateLimitType::iter() {
if self.rate_limit_buckets.get(&rate_limit_type).is_none() {
self
.rate_limit_buckets
.insert(rate_limit_type, HashMap::new());
}
if let Some(bucket) = self.rate_limit_buckets.get_mut(&rate_limit_type) {
if bucket.get(&msg.ip).is_none() {
bucket.insert(
msg.ip.to_owned(),
RateLimitBucket {
last_checked: SystemTime::now(),
allowance: -2f64,
},
);
}
}
}
id
@ -446,11 +486,18 @@ fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<Str
// TODO: none of the chat messages are going to work if stuff is submitted via http api,
// need to move that handling elsewhere
// A DDOS check
chat.check_rate_limit_message(msg.id, false)?;
match user_operation {
UserOperation::Login => do_user_operation::<Login, LoginResponse>(user_operation, data, &conn),
UserOperation::Register => {
chat.check_rate_limit_register(msg.id)?;
do_user_operation::<Register, LoginResponse>(user_operation, data, &conn)
chat.check_rate_limit_register(msg.id, true)?;
let register: Register = serde_json::from_str(data)?;
let res = Oper::new(register).perform(&conn)?;
chat.check_rate_limit_register(msg.id, false)?;
to_json_string(&user_operation, &res)
}
UserOperation::GetUserDetails => {
do_user_operation::<GetUserDetails, GetUserDetailsResponse>(user_operation, data, &conn)
@ -503,8 +550,11 @@ fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<Str
do_user_operation::<ListCommunities, ListCommunitiesResponse>(user_operation, data, &conn)
}
UserOperation::CreateCommunity => {
chat.check_rate_limit_register(msg.id)?;
do_user_operation::<CreateCommunity, CommunityResponse>(user_operation, data, &conn)
chat.check_rate_limit_register(msg.id, true)?;
let create_community: CreateCommunity = serde_json::from_str(data)?;
let res = Oper::new(create_community).perform(&conn)?;
chat.check_rate_limit_register(msg.id, false)?;
to_json_string(&user_operation, &res)
}
UserOperation::EditCommunity => {
let edit_community: EditCommunity = serde_json::from_str(data)?;
@ -566,14 +616,14 @@ fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<Str
to_json_string(&user_operation, &res)
}
UserOperation::CreatePost => {
chat.check_rate_limit_post(msg.id)?;
chat.check_rate_limit_post(msg.id, true)?;
let create_post: CreatePost = serde_json::from_str(data)?;
let res = Oper::new(create_post).perform(&conn)?;
chat.check_rate_limit_post(msg.id, false)?;
chat.post_sends(UserOperation::CreatePost, res, msg.id)
}
UserOperation::CreatePostLike => {
chat.check_rate_limit_message(msg.id)?;
let create_post_like: CreatePostLike = serde_json::from_str(data)?;
let res = Oper::new(create_post_like).perform(&conn)?;
@ -589,7 +639,6 @@ fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<Str
do_user_operation::<SavePost, PostResponse>(user_operation, data, &conn)
}
UserOperation::CreateComment => {
chat.check_rate_limit_message(msg.id)?;
let create_comment: CreateComment = serde_json::from_str(data)?;
let res = Oper::new(create_comment).perform(&conn)?;
@ -605,7 +654,6 @@ fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<Str
do_user_operation::<SaveComment, CommentResponse>(user_operation, data, &conn)
}
UserOperation::CreateCommentLike => {
chat.check_rate_limit_message(msg.id)?;
let create_comment_like: CreateCommentLike = serde_json::from_str(data)?;
let res = Oper::new(create_comment_like).perform(&conn)?;
@ -649,7 +697,6 @@ fn parse_json_message(chat: &mut ChatServer, msg: StandardMessage) -> Result<Str
do_user_operation::<PasswordChange, LoginResponse>(user_operation, data, &conn)
}
UserOperation::CreatePrivateMessage => {
chat.check_rate_limit_message(msg.id)?;
let create_private_message: CreatePrivateMessage = serde_json::from_str(data)?;
let recipient_id = create_private_message.recipient_id;
let res = Oper::new(create_private_message).perform(&conn)?;