1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
# Copyright 2014-2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Any, Dict, Optional, cast
import attr
from synapse.types import JsonDict
from ._base import Config
@attr.s(slots=True, frozen=True, auto_attribs=True)
class RatelimitSettings:
key: str
per_second: float
burst_count: int
@classmethod
def parse(
cls,
config: Dict[str, Any],
key: str,
defaults: Optional[Dict[str, float]] = None,
) -> "RatelimitSettings":
"""Parse config[key] as a new-style rate limiter config.
The key may refer to a nested dictionary using a full stop (.) to separate
each nested key. For example, use the key "a.b.c" to parse the following:
a:
b:
c:
per_second: 10
burst_count: 200
If this lookup fails, we'll fallback to the defaults.
"""
defaults = defaults or {"per_second": 0.17, "burst_count": 3.0}
rl_config = config
for part in key.split("."):
rl_config = rl_config.get(part, {})
# By this point we should have hit the rate limiter parameters.
# We don't actually check this though!
rl_config = cast(Dict[str, float], rl_config)
return cls(
key=key,
per_second=rl_config.get("per_second", defaults["per_second"]),
burst_count=int(rl_config.get("burst_count", defaults["burst_count"])),
)
@attr.s(auto_attribs=True)
class FederationRatelimitSettings:
window_size: int = 1000
sleep_limit: int = 10
sleep_delay: int = 500
reject_limit: int = 50
concurrent: int = 3
class RatelimitConfig(Config):
section = "ratelimiting"
def read_config(self, config: JsonDict, **kwargs: Any) -> None:
# Load the new-style messages config if it exists. Otherwise fall back
# to the old method.
if "rc_message" in config:
self.rc_message = RatelimitSettings.parse(
config, "rc_message", defaults={"per_second": 0.2, "burst_count": 10.0}
)
else:
self.rc_message = RatelimitSettings(
key="rc_messages",
per_second=config.get("rc_messages_per_second", 0.2),
burst_count=config.get("rc_message_burst_count", 10.0),
)
# Load the new-style federation config, if it exists. Otherwise, fall
# back to the old method.
if "rc_federation" in config:
self.rc_federation = FederationRatelimitSettings(**config["rc_federation"])
else:
self.rc_federation = FederationRatelimitSettings(
**{
k: v
for k, v in {
"window_size": config.get("federation_rc_window_size"),
"sleep_limit": config.get("federation_rc_sleep_limit"),
"sleep_delay": config.get("federation_rc_sleep_delay"),
"reject_limit": config.get("federation_rc_reject_limit"),
"concurrent": config.get("federation_rc_concurrent"),
}.items()
if v is not None
}
)
self.rc_registration = RatelimitSettings.parse(config, "rc_registration", {})
self.rc_registration_token_validity = RatelimitSettings.parse(
config,
"rc_registration_token_validity",
defaults={"per_second": 0.1, "burst_count": 5},
)
# It is reasonable to login with a bunch of devices at once (i.e. when
# setting up an account), but it is *not* valid to continually be
# logging into new devices.
self.rc_login_address = RatelimitSettings.parse(
config,
"rc_login.address",
defaults={"per_second": 0.003, "burst_count": 5},
)
self.rc_login_account = RatelimitSettings.parse(
config,
"rc_login.account",
defaults={"per_second": 0.003, "burst_count": 5},
)
self.rc_login_failed_attempts = RatelimitSettings.parse(
config,
"rc_login.failed_attempts",
{},
)
self.federation_rr_transactions_per_room_per_second = config.get(
"federation_rr_transactions_per_room_per_second", 50
)
self.rc_admin_redaction = None
if "rc_admin_redaction" in config:
self.rc_admin_redaction = RatelimitSettings.parse(
config, "rc_admin_redaction", {}
)
self.rc_joins_local = RatelimitSettings.parse(
config,
"rc_joins.local",
defaults={"per_second": 0.1, "burst_count": 10},
)
self.rc_joins_remote = RatelimitSettings.parse(
config,
"rc_joins.remote",
defaults={"per_second": 0.01, "burst_count": 10},
)
# Track the rate of joins to a given room. If there are too many, temporarily
# prevent local joins and remote joins via this server.
self.rc_joins_per_room = RatelimitSettings.parse(
config,
"rc_joins_per_room",
defaults={"per_second": 1, "burst_count": 10},
)
# Ratelimit cross-user key requests:
# * For local requests this is keyed by the sending device.
# * For requests received over federation this is keyed by the origin.
#
# Note that this isn't exposed in the configuration as it is obscure.
self.rc_key_requests = RatelimitSettings.parse(
config,
"rc_key_requests",
defaults={"per_second": 20, "burst_count": 100},
)
self.rc_3pid_validation = RatelimitSettings.parse(
config,
"rc_3pid_validation",
defaults={"per_second": 0.003, "burst_count": 5},
)
self.rc_invites_per_room = RatelimitSettings.parse(
config,
"rc_invites.per_room",
defaults={"per_second": 0.3, "burst_count": 10},
)
self.rc_invites_per_user = RatelimitSettings.parse(
config,
"rc_invites.per_user",
defaults={"per_second": 0.003, "burst_count": 5},
)
self.rc_invites_per_issuer = RatelimitSettings.parse(
config,
"rc_invites.per_issuer",
defaults={"per_second": 0.3, "burst_count": 10},
)
self.rc_third_party_invite = RatelimitSettings.parse(
config,
"rc_third_party_invite",
defaults={"per_second": 0.0025, "burst_count": 5},
)
|
