forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
interface_usdt_net.py
executable file
·171 lines (145 loc) · 6.62 KB
/
interface_usdt_net.py
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
#!/usr/bin/env python3
# Copyright (c) 2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
""" Tests the net:* tracepoint API interface.
See https://github.com/bitcoin/bitcoin/blob/master/doc/tracing.md#context-net
"""
import ctypes
from io import BytesIO
# Test will be skipped if we don't have bcc installed
try:
from bcc import BPF, USDT # type: ignore[import]
except ImportError:
pass
from test_framework.messages import msg_version
from test_framework.p2p import P2PInterface
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import assert_equal
# Tor v3 addresses are 62 chars + 6 chars for the port (':12345').
MAX_PEER_ADDR_LENGTH = 68
MAX_PEER_CONN_TYPE_LENGTH = 20
MAX_MSG_TYPE_LENGTH = 20
# We won't process messages larger than 150 byte in this test. For reading
# larger messanges see contrib/tracing/log_raw_p2p_msgs.py
MAX_MSG_DATA_LENGTH = 150
net_tracepoints_program = """
#include <uapi/linux/ptrace.h>
#define MAX_PEER_ADDR_LENGTH {}
#define MAX_PEER_CONN_TYPE_LENGTH {}
#define MAX_MSG_TYPE_LENGTH {}
#define MAX_MSG_DATA_LENGTH {}
""".format(
MAX_PEER_ADDR_LENGTH,
MAX_PEER_CONN_TYPE_LENGTH,
MAX_MSG_TYPE_LENGTH,
MAX_MSG_DATA_LENGTH
) + """
#define MIN(a,b) ({ __typeof__ (a) _a = (a); __typeof__ (b) _b = (b); _a < _b ? _a : _b; })
struct p2p_message
{
u64 peer_id;
char peer_addr[MAX_PEER_ADDR_LENGTH];
char peer_conn_type[MAX_PEER_CONN_TYPE_LENGTH];
char msg_type[MAX_MSG_TYPE_LENGTH];
u64 msg_size;
u8 msg[MAX_MSG_DATA_LENGTH];
};
BPF_PERF_OUTPUT(inbound_messages);
int trace_inbound_message(struct pt_regs *ctx) {
struct p2p_message msg = {};
bpf_usdt_readarg(1, ctx, &msg.peer_id);
bpf_usdt_readarg_p(2, ctx, &msg.peer_addr, MAX_PEER_ADDR_LENGTH);
bpf_usdt_readarg_p(3, ctx, &msg.peer_conn_type, MAX_PEER_CONN_TYPE_LENGTH);
bpf_usdt_readarg_p(4, ctx, &msg.msg_type, MAX_MSG_TYPE_LENGTH);
bpf_usdt_readarg(5, ctx, &msg.msg_size);
bpf_usdt_readarg_p(6, ctx, &msg.msg, MIN(msg.msg_size, MAX_MSG_DATA_LENGTH));
inbound_messages.perf_submit(ctx, &msg, sizeof(msg));
return 0;
}
BPF_PERF_OUTPUT(outbound_messages);
int trace_outbound_message(struct pt_regs *ctx) {
struct p2p_message msg = {};
bpf_usdt_readarg(1, ctx, &msg.peer_id);
bpf_usdt_readarg_p(2, ctx, &msg.peer_addr, MAX_PEER_ADDR_LENGTH);
bpf_usdt_readarg_p(3, ctx, &msg.peer_conn_type, MAX_PEER_CONN_TYPE_LENGTH);
bpf_usdt_readarg_p(4, ctx, &msg.msg_type, MAX_MSG_TYPE_LENGTH);
bpf_usdt_readarg(5, ctx, &msg.msg_size);
bpf_usdt_readarg_p(6, ctx, &msg.msg, MIN(msg.msg_size, MAX_MSG_DATA_LENGTH));
outbound_messages.perf_submit(ctx, &msg, sizeof(msg));
return 0;
};
"""
class NetTracepointTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
def skip_test_if_missing_module(self):
self.skip_if_platform_not_linux()
self.skip_if_no_bitcoind_tracepoints()
self.skip_if_no_python_bcc()
self.skip_if_no_bpf_permissions()
def run_test(self):
# Tests the net:inbound_message and net:outbound_message tracepoints
# See https://github.com/bitcoin/bitcoin/blob/master/doc/tracing.md#context-net
class P2PMessage(ctypes.Structure):
_fields_ = [
("peer_id", ctypes.c_uint64),
("peer_addr", ctypes.c_char * MAX_PEER_ADDR_LENGTH),
("peer_conn_type", ctypes.c_char * MAX_PEER_CONN_TYPE_LENGTH),
("msg_type", ctypes.c_char * MAX_MSG_TYPE_LENGTH),
("msg_size", ctypes.c_uint64),
("msg", ctypes.c_ubyte * MAX_MSG_DATA_LENGTH),
]
def __repr__(self):
return f"P2PMessage(peer={self.peer_id}, addr={self.peer_addr.decode('utf-8')}, conn_type={self.peer_conn_type.decode('utf-8')}, msg_type={self.msg_type.decode('utf-8')}, msg_size={self.msg_size})"
self.log.info(
"hook into the net:inbound_message and net:outbound_message tracepoints")
ctx = USDT(pid=self.nodes[0].process.pid)
ctx.enable_probe(probe="net:inbound_message",
fn_name="trace_inbound_message")
ctx.enable_probe(probe="net:outbound_message",
fn_name="trace_outbound_message")
bpf = BPF(text=net_tracepoints_program, usdt_contexts=[ctx], debug=0, cflags=["-Wno-error=implicit-function-declaration"])
EXPECTED_INOUTBOUND_VERSION_MSG = 1
checked_inbound_version_msg = 0
checked_outbound_version_msg = 0
events = []
def check_p2p_message(event, is_inbound):
nonlocal checked_inbound_version_msg, checked_outbound_version_msg
if event.msg_type.decode("utf-8") == "version":
self.log.info(
f"check_p2p_message(): {'inbound' if is_inbound else 'outbound'} {event}")
peer = self.nodes[0].getpeerinfo()[0]
msg = msg_version()
msg.deserialize(BytesIO(bytes(event.msg[:event.msg_size])))
assert_equal(peer["id"], event.peer_id, peer["id"])
assert_equal(peer["addr"], event.peer_addr.decode("utf-8"))
assert_equal(peer["connection_type"],
event.peer_conn_type.decode("utf-8"))
if is_inbound:
checked_inbound_version_msg += 1
else:
checked_outbound_version_msg += 1
def handle_inbound(_, data, __):
event = ctypes.cast(data, ctypes.POINTER(P2PMessage)).contents
events.append((event, True))
def handle_outbound(_, data, __):
event = ctypes.cast(data, ctypes.POINTER(P2PMessage)).contents
events.append((event, False))
bpf["inbound_messages"].open_perf_buffer(handle_inbound)
bpf["outbound_messages"].open_perf_buffer(handle_outbound)
self.log.info("connect a P2P test node to our bitcoind node")
test_node = P2PInterface()
self.nodes[0].add_p2p_connection(test_node)
bpf.perf_buffer_poll(timeout=200)
self.log.info(
"check receipt and content of in- and outbound version messages")
for event, is_inbound in events:
check_p2p_message(event, is_inbound)
assert_equal(EXPECTED_INOUTBOUND_VERSION_MSG,
checked_inbound_version_msg)
assert_equal(EXPECTED_INOUTBOUND_VERSION_MSG,
checked_outbound_version_msg)
bpf.cleanup()
if __name__ == '__main__':
NetTracepointTest().main()