#!/usr/bin/env python
#
# Copyright (C) 2025 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
"""
Unit tests for the tag-keyed aggregate replay module (sharkd edition):
* pcap record-header scanning (ts extraction, truncated-tail tolerance,
nanosecond-magic normalization) and raw-bytes reads for the hex view
* the tag gate (404 unknown tag, 409 while any marker captures) — engine-free
* timeline assembly with injected columns: cross-source merge ordered by
(ts, source, frame number), same-microsecond tiebreak, the uncapped full
frame list, display-filter application before count/slice
* the tree key renaming (closed census key set, values untouched, unknown
keys pass through verbatim, internal hf ids dropped)
* the resident sharkd sessions — spawn/load/reuse, (mtime, size)
invalidation, LRU bound (idle-only eviction), single spawn under
concurrent acquires, timeout/stale-reply aborts — against the real sharkd
where installed, plus the frame detail end-to-end (hex + renamed tree +
filter expressions, same-microsecond disambiguation).
"""
import asyncio
import os
import shutil
import struct
import sys
from types import SimpleNamespace
from unittest.mock import patch
import pytest
from gns3server.controller.controller_error import (
ControllerBadRequestError,
ControllerError,
ControllerNotFoundError,
)
from gns3server.controller import marker_replay
from gns3server.controller.marker_replay import (
FilterError,
SharkdError,
SharkdMissingError,
build_timeline,
decode_frame,
query_frames,
read_frame_bytes,
scan_pcap_frames,
_count_tree_nodes,
_format_ts,
_parse_ts,
_rename_value,
)
pytestmark = pytest.mark.asyncio
PCAP_MAGIC_US = 0xA1B2C3D4
PCAP_MAGIC_NS = 0xA1B23C4D
sharkd_present = pytest.mark.skipif(shutil.which("sharkd") is None, reason="sharkd not installed")
def _write_pcap(path, frames, magic=PCAP_MAGIC_US, snaplen=65535):
"""frames: list of (sec, frac, payload bytes); frac is µs (or ns for the ns magic)."""
with open(path, "wb") as f:
f.write(struct.pack("> 16:
s = (s & 0xFFFF) + (s >> 16)
return (~s) & 0xFFFF
def _icmp_frame():
"""A minimal well-formed ICMP echo request (10.0.0.1 → 10.0.0.3)."""
icmp = bytes([8, 0, 0, 0]) + struct.pack(">HHH", 1, 1, 0) + b"payload12"
icmp = icmp[:2] + struct.pack(">H", _cksum(icmp)) + icmp[4:]
ip0 = struct.pack(">BBHHHBBH4s4s", 0x45, 0, 20 + len(icmp), 1, 0, 64, 1, 0,
bytes([10, 0, 0, 1]), bytes([10, 0, 0, 3]))
ip = ip0[:10] + struct.pack(">H", _cksum(ip0)) + ip0[12:]
return bytes.fromhex("0200000000020200000000010800") + ip + icmp
def _tcp_syn_frame():
"""A minimal TCP SYN (10.0.0.1:472 → 10.0.0.3:22)."""
tcp = struct.pack(">HHIIBBHHH", 472, 22, 0, 0, 0x50, 0x02, 64240, 0, 0)
ip0 = struct.pack(">BBHHHBBH4s4s", 0x45, 0, 20 + len(tcp), 2, 0, 64, 6, 0,
bytes([10, 0, 0, 1]), bytes([10, 0, 0, 3]))
ip = ip0[:10] + struct.pack(">H", _cksum(ip0)) + ip0[12:]
tcp = tcp[:16] + struct.pack(">H", _cksum(ip0[12:] + tcp)) + tcp[18:]
return bytes.fromhex("0200000000020200000000010800") + ip + tcp
def _fake_project(tmp_path, markers, markers_dir=None):
"""markers: the flat project.markers shape ({'link/name': {..., node_id}})."""
return SimpleNamespace(markers=markers, markers_directory=str(markers_dir or tmp_path))
def _marker_entry(tag, enabled=True, node_id="node-1"):
return {"bpf": "icmp", "tag": tag, "enabled": enabled, "color": None,
"highlight_duration": None, "capture_node_id": node_id,
"direction": None, "data_link_type": "DLT_EN10MB",
"node_id": node_id}
def _fake_columns(monkeypatch, mapping):
"""Inject canned sharkd columns: mapping pcap-basename → {frame#: cols or None}.
Frames absent from the dict get no columns; when the caller passes a
filter, the injected set IS the matching set (mirroring the real engine).
"""
async def fake_columns_for(pcap, filter_expr):
return mapping.get(os.path.basename(pcap), {})
monkeypatch.setattr(marker_replay, "_columns_for", fake_columns_for)
def _cols(src="10.0.0.1", dst="10.0.0.3", proto="ICMP", info="Echo (ping) request"):
return {"src": src, "dst": dst, "proto": proto, "info": info,
"bg": "ffffff", "fg": "000000"}
class _FakeSession:
"""Duck-typed _SharkdSession for manager-level tests (no engine)."""
def __init__(self, pcap):
self.pcap = pcap
self.last_used = 0
self.closed = False
self._uses = 0
self._detached = False
self.mtime_ns, self.size = 0, 0
def matches(self, stat):
return True
def alive(self):
return not self.closed
def touch(self):
pass
async def close(self):
self.closed = True
# ---------------------------------------------------------------------------
# pcap scanning (engine-free backbone)
# ---------------------------------------------------------------------------
class TestScanPcap:
async def test_scans_frames_and_truncated_tail(self, tmp_path):
pcap = tmp_path / "a.pcap"
_write_pcap(pcap, [
(1693472000, 123456, b"x" * 60),
(1693472001, 654321, b"y" * 40),
])
# Tear the final record in half: a snapshot mid-write must not raise.
data = bytearray(pcap.read_bytes())
pcap.write_bytes(data[:len(data) - 20])
frames = scan_pcap_frames(str(pcap))
assert frames == [(1693472000, 123456, 60)]
async def test_ns_magic_normalized_to_us(self, tmp_path):
pcap = tmp_path / "ns.pcap"
_write_pcap(pcap, [(1693472000, 1500000, b"z" * 10)], magic=PCAP_MAGIC_NS)
assert scan_pcap_frames(str(pcap)) == [(1693472000, 1500, 10)] # 1.5 ms in µs
async def test_read_frame_bytes_offsets(self, tmp_path):
pcap = tmp_path / "b.pcap"
_write_pcap(pcap, [
(100, 0, b"first" + b"0" * 55), # 60 bytes
(200, 0, b"second"), # 6 bytes
])
assert read_frame_bytes(str(pcap), 2) == b"second".hex()
assert read_frame_bytes(str(pcap), 1) == (b"first" + b"0" * 55).hex()
assert read_frame_bytes(str(pcap), 3) is None
async def test_ts_string_round_trip_is_exact(self):
ts = _format_ts(1693472000, 5)
assert ts == "1693472000.000005"
assert _parse_ts(ts) == 1693472000000005
assert _parse_ts(_format_ts(1693472000, 123456)) == 1693472000123456
# ---------------------------------------------------------------------------
# Tag gate (engine-free — raised before any sharkd work)
# ---------------------------------------------------------------------------
class TestGate:
async def test_unknown_tag_404(self, tmp_path):
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=1)})
with pytest.raises(ControllerNotFoundError):
await build_timeline(project, tag=7)
async def test_gate_409_while_capturing(self, tmp_path):
project = _fake_project(tmp_path, {
"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1"),
"linkB/icmp": _marker_entry(tag=7, enabled=True, node_id="n2"),
})
with pytest.raises(ControllerError, match="linkB"):
await build_timeline(project, tag=7)
async def test_filter_length_capped(self, tmp_path, monkeypatch):
_fake_columns(monkeypatch, {})
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False)})
with pytest.raises(ControllerBadRequestError, match="too long"):
await build_timeline(project, tag=7, filter_expr="x" * (marker_replay.FILTER_MAX_LENGTH + 1))
# ---------------------------------------------------------------------------
# Timeline assembly (columns injected — no engine needed)
# ---------------------------------------------------------------------------
class TestTimeline:
async def test_merge_orders_by_ts_with_stable_tiebreak(self, tmp_path, monkeypatch):
# Two sources, deliberately interleaved in time, colliding on one µs.
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 500000, b"a" * 60), # t1 sourceA
(1693472002, 000000, b"a" * 60), # t3 sourceA
])
_write_pcap(tmp_path / "n2_linkB_icmp.pcap", [
(1693472001, 000000, b"b" * 60), # t2 sourceB
(1693472002, 000000, b"b" * 60), # t3 sourceB — same µs as t3 sourceA
])
_fake_columns(monkeypatch, {
"n1_linkA_icmp.pcap": {1: _cols(), 2: _cols()},
"n2_linkB_icmp.pcap": {1: _cols(src="10.0.0.2"), 2: _cols(src="10.0.0.2")},
})
project = _fake_project(tmp_path, {
"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1"),
"linkB/icmp": _marker_entry(tag=7, enabled=False, node_id="n2"),
})
timeline = await build_timeline(project, tag=7)
assert timeline["frame_count"] == 4
assert timeline["start"] == "1693472000.500000"
assert timeline["end"] == "1693472002.000000"
assert [f["node_id"] for f in timeline["frames"]] == ["n1", "n2", "n1", "n2"]
# Same-microsecond pair keeps both frames (a ts dict key would drop one).
assert [f["ts"] for f in timeline["frames"]][2:] == ["1693472002.000000"] * 2
assert [f["frame_number"] for f in timeline["frames"]] == [1, 1, 2, 2]
# Columns ride along verbatim.
assert timeline["frames"][0]["src"] == "10.0.0.1"
assert timeline["frames"][1]["src"] == "10.0.0.2"
assert timeline["frames"][0]["proto"] == "ICMP"
assert {s["count"] for s in timeline["sources"]} == {2}
async def test_columns_missing_for_a_frame_still_lists_it(self, tmp_path, monkeypatch):
# A frame the (injected) engine did not describe keeps its place with
# null columns — the timeline backbone never depends on the engine.
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [(1693472000, 0, b"a" * 60)])
_fake_columns(monkeypatch, {}) # engine describes nothing
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1")})
timeline = await build_timeline(project, tag=7)
frame = timeline["frames"][0]
assert frame["ts"] == "1693472000.000000"
assert frame["src"] is None and frame["info"] is None
async def test_missing_pcap_is_zero_count_source(self, tmp_path, monkeypatch):
_fake_columns(monkeypatch, {})
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False)})
timeline = await build_timeline(project, tag=7)
assert timeline["frame_count"] == 0
assert timeline["start"] is None and timeline["end"] is None
assert timeline["frames"] == []
assert timeline["sources"][0]["count"] == 0
async def test_frame_list_is_uncapped(self, tmp_path, monkeypatch):
# The list is the whole contract — no truncation flag, no buckets,
# however many frames the tag holds.
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 0, b"a" * 60), (1693472000, 500000, b"a" * 60),
(1693472001, 0, b"a" * 60),
])
_fake_columns(monkeypatch, {"n1_linkA_icmp.pcap": {1: _cols(), 2: _cols(), 3: _cols()}})
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1")})
timeline = await build_timeline(project, tag=7)
assert timeline["frame_count"] == 3
assert len(timeline["frames"]) == 3
assert "truncated" not in timeline and "buckets" not in timeline
async def test_filter_applies_before_count_and_slice(self, tmp_path, monkeypatch):
# Three frames; the injected "matching set" (what a real engine would
# return for the filter) contains only frames 1 and 3.
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 0, b"a" * 60),
(1693472001, 0, b"a" * 60),
(1693472002, 0, b"a" * 60),
])
_fake_columns(monkeypatch, {"n1_linkA_icmp.pcap": {1: _cols(), 3: _cols(proto="TCP")}})
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1")})
timeline = await build_timeline(project, tag=7, filter_expr="tcp")
assert timeline["frame_count"] == 2
assert timeline["start"] == "1693472000.000000"
assert timeline["end"] == "1693472002.000000"
# frame numbers keep their ORIGINAL pcap identity through the filter.
assert [f["frame_number"] for f in timeline["frames"]] == [1, 3]
# sources[] is the stable inventory: engine-free TOTAL counts,
# unaffected by link/filter (the WebUI source dropdown must not
# shrink when the view narrows).
assert timeline["sources"][0]["count"] == 3
class TestLinkFilter:
"""``link_id`` narrows the frame stream to one capture source before
counting/slicing/bucketing; sources stay the full inventory."""
def _project(self, tmp_path, monkeypatch, columns_override=None):
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 500000, b"a" * 60),
(1693472002, 000000, b"a" * 60),
])
_write_pcap(tmp_path / "n2_linkB_icmp.pcap", [
(1693472001, 000000, b"b" * 60),
(1693472002, 000000, b"b" * 60),
])
async def fake_columns(pcap, filter_expr):
if columns_override is not None:
return await columns_override(os.path.basename(pcap), filter_expr)
src = "10.0.0.1" if "n1" in pcap else "10.0.0.2"
return {1: _cols(src=src), 2: _cols(src=src)}
monkeypatch.setattr(marker_replay, "_columns_for", fake_columns)
return _fake_project(tmp_path, {
"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1"),
"linkB/icmp": _marker_entry(tag=7, enabled=False, node_id="n2"),
})
async def test_link_narrows_before_count_and_slice(self, tmp_path, monkeypatch):
timeline = await build_timeline(self._project(tmp_path, monkeypatch), tag=7, link_id="linkA")
assert timeline["frame_count"] == 2
assert timeline["start"] == "1693472000.500000"
assert [f["link_id"] for f in timeline["frames"]] == ["linkA", "linkA"]
# sources stay the FULL inventory with engine-free totals.
assert sorted((s["link_id"], s["count"]) for s in timeline["sources"]) == [
("linkA", 2), ("linkB", 2)
]
async def test_unknown_link_is_empty_success(self, tmp_path, monkeypatch):
timeline = await build_timeline(self._project(tmp_path, monkeypatch), tag=7, link_id="nope")
assert timeline["frame_count"] == 0
assert timeline["start"] is None and timeline["end"] is None
assert timeline["frames"] == []
assert len(timeline["sources"]) == 2
async def test_link_and_filter_compose_as_and(self, tmp_path, monkeypatch):
# The injected "matching set" contains only frame 2 per source —
# combined with link=linkA the view is exactly that one frame.
async def override(basename, filter_expr):
assert filter_expr == "tcp"
return {2: _cols(proto="TCP")}
project = self._project(tmp_path, monkeypatch, columns_override=override)
timeline = await build_timeline(project, tag=7, filter_expr="tcp", link_id="linkA")
assert timeline["frame_count"] == 1
assert timeline["frames"][0]["frame_number"] == 2
assert timeline["frames"][0]["link_id"] == "linkA"
async def test_empty_link_string_means_absent(self, tmp_path, monkeypatch):
timeline = await build_timeline(self._project(tmp_path, monkeypatch), tag=7, link_id="")
assert timeline["frame_count"] == 4
async def test_query_frames_window_over_link_stream(self, tmp_path, monkeypatch):
project = self._project(tmp_path, monkeypatch)
result = await query_frames(project, tag=7, ts="1693472002.000000",
window_ms=0, link_id="linkB")
assert [f["link_id"] for f in result["frames"]] == ["linkB"]
class TestQueryFrames:
def _project(self, tmp_path, monkeypatch):
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 0, b"a" * 60),
(1693472000, 150000, b"a" * 60),
(1693472005, 0, b"a" * 60),
])
_fake_columns(monkeypatch, {"n1_linkA_icmp.pcap": {i: _cols() for i in (1, 2, 3)}})
return _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1")})
async def test_window_inclusive_bounds(self, tmp_path, monkeypatch):
result = await query_frames(self._project(tmp_path, monkeypatch), tag=7,
ts="1693472000.000000", window_ms=150)
assert [f["ts"] for f in result["frames"]] == ["1693472000.000000", "1693472000.150000"]
async def test_window_miss_is_empty_success(self, tmp_path, monkeypatch):
result = await query_frames(self._project(tmp_path, monkeypatch), tag=7,
ts="1693472001.000000", window_ms=100)
assert result == {"frames": []}
async def test_limit_applies(self, tmp_path, monkeypatch):
result = await query_frames(self._project(tmp_path, monkeypatch), tag=7,
ts="1693472000.000000", window_ms=150, limit=1)
assert len(result["frames"]) == 1
# ---------------------------------------------------------------------------
# Tree key renaming
# ---------------------------------------------------------------------------
class TestRename:
async def test_renames_closed_key_set_and_drops_hf_id(self):
node = {
"t": "proto", "l": "Time to Live: 64", "fn": "ip.ttl",
"f": "ip.ttl == 64", "h": [22, 1], "s": None, "g": False,
"e": 8472,
"n": [{"l": "nested", "h": [23, 2], "n": []}],
}
renamed = _rename_value(node)
assert renamed == {
"element": "proto", "label": "Time to Live: 64", "name": "ip.ttl",
"filter_expr": "ip.ttl == 64", "pos": 22, "size": 1,
"expert": None, "generated": False,
"children": [{"label": "nested", "pos": 23, "size": 2, "children": []}],
}
async def test_unknown_keys_pass_through_verbatim(self):
# A future Wireshark adding a key must never silently lose data.
node = {"l": "x", "future_key": {"deep": [1, 2]}, "n": []}
renamed = _rename_value(node)
assert renamed["future_key"] == {"deep": [1, 2]}
async def test_count_tree_nodes_counts_dicts_only(self):
assert _count_tree_nodes({"a": [{"b": 1}, "str", 3]}) == 2
# ---------------------------------------------------------------------------
# sharkd sessions + engine-backed behaviour
# ---------------------------------------------------------------------------
class TestSessions:
async def test_missing_sharkd_raises_501_error(self, tmp_path):
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [(1693472000, 0, b"a" * 60)])
project = _fake_project(tmp_path, {"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1")})
with patch("gns3server.controller.marker_replay.shutil.which", return_value=None):
with pytest.raises(SharkdMissingError):
await build_timeline(project, tag=7)
async def test_cap_evicts_idle_lru_only(self, tmp_path):
manager = marker_replay._SharkdManager()
fakes = {}
async def fake_spawn(pcap, stat):
session = _FakeSession(pcap)
fakes[pcap] = session
return session
with patch.object(manager, "_spawn", side_effect=fake_spawn):
# cap + 2 distinct pcaps, each acquired and released (idle again).
for i in range(marker_replay.SESSION_MAX + 2):
pcap = tmp_path / f"pcap{i}"
_write_pcap(pcap, [(1693472000, 0, b"a" * 60)])
async with manager.session(str(pcap)):
pass
# Bounded to SESSION_MAX; the earliest (least recently used) closed.
assert len(manager._sessions) == marker_replay.SESSION_MAX
assert fakes[str(tmp_path / "pcap0")].closed is True
assert fakes[str(tmp_path / "pcap1")].closed is True
assert fakes[str(tmp_path / "pcap2")].closed is False
async def test_in_use_session_survives_cap_pressure(self, tmp_path):
manager = marker_replay._SharkdManager()
async def fake_spawn(pcap, stat):
return _FakeSession(pcap)
with patch.object(manager, "_spawn", side_effect=fake_spawn):
pcap0 = tmp_path / "pcap0"
_write_pcap(pcap0, [(1693472000, 0, b"a" * 60)])
async with manager.session(str(pcap0)) as held:
# More sources than the cap while pcap0 is held open.
for i in range(1, marker_replay.SESSION_MAX + 4):
pcap = tmp_path / f"pcap{i}"
_write_pcap(pcap, [(1693472000, 0, b"a" * 60)])
async with manager.session(str(pcap)):
pass
# A held session is never the eviction victim (no mid-RPC kill).
assert held.closed is False
assert str(pcap0) in manager._sessions
# Released → the population is trimmed back under the cap.
assert len(manager._sessions) <= marker_replay.SESSION_MAX
await manager.close_all()
async def test_concurrent_acquire_spawns_once(self, tmp_path):
manager = marker_replay._SharkdManager()
spawns = []
async def slow_spawn(pcap, stat):
spawns.append(pcap)
await asyncio.sleep(0.05) # widen the check-then-spawn window
return _FakeSession(pcap)
pcap = tmp_path / "n1_linkA_icmp.pcap"
_write_pcap(pcap, [(1693472000, 0, b"a" * 60)])
with patch.object(manager, "_spawn", side_effect=slow_spawn):
first, second = await asyncio.gather(
manager._acquire(str(pcap)), manager._acquire(str(pcap))
)
assert first is second # concurrent requests share one spawn
assert len(spawns) == 1
await manager.close_all()
async def test_rpc_timeout_kills_session(self, tmp_path, monkeypatch):
monkeypatch.setattr(marker_replay, "RPC_TIMEOUT_SECONDS", 0.2)
pcap = tmp_path / "n1_linkA_icmp.pcap"
_write_pcap(pcap, [(1693472000, 0, b"a" * 60)])
# A process that never answers: the session must die (never serve the
# late reply to a later request) instead of staying resident.
proc = await asyncio.create_subprocess_exec(
"sleep", "60",
stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE,
)
session = marker_replay._SharkdSession(
str(pcap), str(tmp_path / "scratch"), "unused", proc, os.stat(str(pcap))
)
with pytest.raises(SharkdError, match="timed out"):
await session.rpc("frames", {})
assert session.alive() is False
assert proc.returncode is not None
async def test_stale_reply_id_aborts_session(self, tmp_path):
# A "sharkd" that always answers with a foreign id — every reply is a
# stale one as far as the caller is concerned; serving it would be
# shifted data, so the session must abort instead.
fake = tmp_path / "fake_sharkd.py"
fake.write_text(
"import json, sys\n"
"for line in sys.stdin:\n"
" json.loads(line)\n"
" sys.stdout.write(json.dumps({'jsonrpc': '2.0', 'id': 424242, 'result': []}) + '\\n')\n"
" sys.stdout.flush()\n"
)
pcap = tmp_path / "n1_linkA_icmp.pcap"
_write_pcap(pcap, [(1693472000, 0, b"a" * 60)])
proc = await asyncio.create_subprocess_exec(
sys.executable, str(fake),
stdin=asyncio.subprocess.PIPE, stdout=asyncio.subprocess.PIPE,
)
session = marker_replay._SharkdSession(
str(pcap), str(tmp_path / "scratch"), "unused", proc, os.stat(str(pcap))
)
with pytest.raises(SharkdError, match="id mismatch"):
await session.rpc("frames", {})
assert session.alive() is False
assert proc.returncode is not None
async def test_filter_error_only_for_the_filter_code(self, tmp_path, monkeypatch):
manager = marker_replay._SharkdManager()
monkeypatch.setattr(marker_replay, "_manager", manager)
pcap = tmp_path / "n1_linkA_icmp.pcap"
_write_pcap(pcap, [(1693472000, 0, b"a" * 60)])
class _RpcFail(_FakeSession):
def __init__(self, pcap, code):
super().__init__(pcap)
self.code = code
async def rpc(self, method, params):
raise marker_replay._SharkdRpcError(self.code, "boom")
manager._sessions[str(pcap)] = _RpcFail(str(pcap), marker_replay._ERR_INVALID_FILTER)
with pytest.raises(FilterError):
await marker_replay._columns_for(str(pcap), "icmp")
# Same failure WITHOUT a filter is an engine fault, not a 400.
manager._sessions[str(pcap)] = _RpcFail(str(pcap), marker_replay._ERR_INVALID_FILTER)
with pytest.raises(SharkdError):
await marker_replay._columns_for(str(pcap), None)
# A non-filter engine error with a filter set is NOT the client's fault.
manager._sessions[str(pcap)] = _RpcFail(str(pcap), -9999)
with pytest.raises(SharkdError):
await marker_replay._columns_for(str(pcap), "icmp")
@sharkd_present
async def test_real_pagination_over_1000_frames(self, tmp_path):
# A full page measures well over the 64 KB default StreamReader limit
# (~190 KB with realistic columns) — pagination must not blow up the
# stream (nor desync the resident session).
pcap = tmp_path / "big.pcap"
_write_pcap(pcap, [(1693472000 + i, 0, _icmp_frame()) for i in range(1001)])
manager = marker_replay._get_manager()
try:
columns = await marker_replay._columns_for(str(pcap), None)
assert len(columns) == 1001
assert columns[1001]["src"] == "10.0.0.1"
assert columns[1001]["proto"] == "ICMP"
finally:
await manager.close_all()
@sharkd_present
async def test_real_session_columns_and_filter(self, tmp_path):
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 123456, _icmp_frame()),
(1693472001, 0, _tcp_syn_frame()),
])
manager = marker_replay._get_manager()
try:
columns = await marker_replay._columns_for(str(tmp_path / "n1_linkA_icmp.pcap"), None)
assert columns[1]["src"] == "10.0.0.1"
assert columns[1]["proto"] == "ICMP"
assert "Echo" in columns[1]["info"]
assert columns[2]["proto"] == "TCP"
only_tcp = await marker_replay._columns_for(str(tmp_path / "n1_linkA_icmp.pcap"), "tcp")
assert set(only_tcp) == {2}
finally:
await manager.close_all()
@sharkd_present
async def test_real_session_invalid_filter_raises_filter_error(self, tmp_path):
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [(1693472000, 123456, _icmp_frame())])
manager = marker_replay._get_manager()
try:
with pytest.raises(FilterError):
await marker_replay._columns_for(str(tmp_path / "n1_linkA_icmp.pcap"), "this is (not valid")
finally:
await manager.close_all()
@sharkd_present
async def test_real_session_respawns_on_stat_change(self, tmp_path):
pcap = tmp_path / "n1_linkA_icmp.pcap"
_write_pcap(pcap, [(1693472000, 123456, _icmp_frame())])
manager = marker_replay._get_manager()
try:
async with manager.session(str(pcap)) as first:
pass
async with manager.session(str(pcap)) as warm:
assert warm is first # warm reuse
# Rewrite the file (simulating a truncated/rebuilt capture).
_write_pcap(pcap, [(1693473000, 0, _icmp_frame())])
async with manager.session(str(pcap)) as second:
assert second is not first
columns = await marker_replay._columns_for(str(pcap), None)
assert set(columns) == {1}
finally:
await manager.close_all()
class TestDecodeFrame:
def _project(self, tmp_path):
_write_pcap(tmp_path / "n1_linkA_icmp.pcap", [
(1693472000, 123456, _icmp_frame()),
])
return _fake_project(tmp_path, {
"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1"),
})
async def test_ts_mismatch_guard_404(self, tmp_path):
project = self._project(tmp_path)
with pytest.raises(ControllerNotFoundError, match="rebuilt"):
await decode_frame(project, tag=7, ts="1.000000",
node_id="n1", link_id="linkA", marker="icmp")
async def test_unknown_source_404(self, tmp_path):
project = self._project(tmp_path)
with pytest.raises(ControllerNotFoundError):
await decode_frame(project, tag=7, ts="1693472000.123456",
node_id="nobody", link_id="linkA", marker="icmp")
async def test_explicit_frame_number_out_of_range_404(self, tmp_path):
project = self._project(tmp_path)
with pytest.raises(ControllerNotFoundError, match="rebuilt"):
await decode_frame(project, tag=7, ts="1693472000.123456",
node_id="n1", link_id="linkA", marker="icmp", frame_number=5)
async def test_explicit_frame_number_ts_mismatch_404(self, tmp_path):
# The frame number must still land on the exact round-tripped ts —
# a rebuilt capture cannot be decoded by stale coordinates.
project = self._project(tmp_path)
with pytest.raises(ControllerNotFoundError, match="rebuilt"):
await decode_frame(project, tag=7, ts="1693472001.000000",
node_id="n1", link_id="linkA", marker="icmp", frame_number=1)
async def test_hex_read_failure_is_404_not_null_hex(self, tmp_path, monkeypatch):
project = self._project(tmp_path)
monkeypatch.setattr(marker_replay, "read_frame_bytes", lambda path, n: None)
with pytest.raises(ControllerNotFoundError, match="rebuilt"):
await decode_frame(project, tag=7, ts="1693472000.123456",
node_id="n1", link_id="linkA", marker="icmp")
@sharkd_present
async def test_same_microsecond_frames_disambiguated_by_frame_number(self, tmp_path):
# ts is not unique within one pcap: two frames share a microsecond,
# and only the explicit frame number tells them apart.
pcap = tmp_path / "n1_linkA_icmp.pcap"
icmp, tcp = _icmp_frame(), _tcp_syn_frame()
_write_pcap(pcap, [(1693472000, 123456, icmp), (1693472000, 123456, tcp)])
project = _fake_project(tmp_path, {
"linkA/icmp": _marker_entry(tag=7, enabled=False, node_id="n1"),
})
manager = marker_replay._get_manager()
try:
default = await decode_frame(project, tag=7, ts="1693472000.123456",
node_id="n1", link_id="linkA", marker="icmp")
second = await decode_frame(project, tag=7, ts="1693472000.123456",
node_id="n1", link_id="linkA", marker="icmp",
frame_number=2)
finally:
await manager.close_all()
# Without a frame number: first ts match.
assert default["source"]["frame_number"] == 1
assert default["hex"] == icmp.hex()
# With one: exactly that frame's bytes and tree.
assert second["source"]["frame_number"] == 2
assert second["hex"] == tcp.hex()
assert second["field_count"] > 10
@sharkd_present
async def test_decode_end_to_end(self, tmp_path):
manager = marker_replay._get_manager()
try:
project = self._project(tmp_path)
detail = await decode_frame(project, tag=7, ts="1693472000.123456",
node_id="n1", link_id="linkA", marker="icmp")
finally:
await manager.close_all()
assert detail["source"]["frame_number"] == 1
assert detail["hex"] == _icmp_frame().hex()
assert detail["field_count"] > 10
# Renamed tree: every label/name present, filter expressions with
# values baked in, byte ranges for hex highlighting.
def find(node, name):
for child in node if isinstance(node, list) else node.get("children", []):
if child.get("name") == name:
return child
deep = find(child, name)
if deep is not None:
return deep
return None
ttl = find(detail["tree"], "ip.ttl")
assert ttl is not None
assert ttl["label"] == "Time to Live: 64"
assert ttl["filter_expr"] == "ip.ttl == 64"
assert ttl["pos"] == 22 and ttl["size"] == 1
@sharkd_present
async def test_key_census_closed_set(self, tmp_path):
"""The rename correctness guarantee: across protocol-diverse real
trees, sharkd's raw key set stays within the census-known keys."""
pcap = tmp_path / "proto_mix.pcap"
_write_pcap(pcap, [
(1693472000, 100000, _icmp_frame()),
(1693472001, 0, _tcp_syn_frame()),
])
manager = marker_replay._get_manager()
try:
known = set(marker_replay._KEY_RENAME) | {"h", "e"}
seen = set()
def walk(value):
if isinstance(value, dict):
seen.update(value.keys())
for item in value.values():
walk(item)
elif isinstance(value, list):
for item in value:
walk(item)
async with manager.session(str(pcap)) as session:
for frame_number in (1, 2):
result = await session.rpc("frame", {"frame": frame_number, "proto": True})
walk(result.get("tree", []))
assert seen <= known, f"unknown sharkd keys appeared: {seen - known}"
finally:
await manager.close_all()