julian.kiedaischandClaude Opus 5.5
12849b1535
engine.ts ports Swift's "Java-compatible TCP sockets" in one piece, since half a state machine could not be checked: server and client sockets (a free port from Java's random numbers on their own seed), the three-way handshake with its result (connected, invalid socket, unreachable, timed out), segments of 1460 bytes, messages up to the push, a timeout of 3 × 2.5 s with at most three attempts, closing through every Java state including TIME_WAIT (2.5 s), sequence numbers modulo 2^32. Three scenarios match the Swift engine trace for trace: a LAN with data over three segments, closing from both ends, a closed port and an unreachable host; two networks through a router with a firewall rule, data lost until the connection closes, and an accepted socket that does not hold the port of its closed listener; CLOSING, reached by a lost FIN. The engine delivers a FIN within the same close, so both ends close at once only with packet loss; an empty message does not arrive in Swift (it does not advance the sequence number), nor here. Swift's four TCP engine tests are ported, with tests for stopping, a foreign SYN+ACK at a listener and the flag names. 17 mutation probes, 16 caught; the other (delivered, not waited, not connected gives unreachable) cannot be reached through Swift's engine, which never sends a reset and always acknowledges correctly. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
216 lines
5.0 KiB
JSON
216 lines
5.0 KiB
JSON
{
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"seed": 31,
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"nodes": [
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{
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"id": "00000000-0000-0000-0000-000000000101",
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"kind": "pc",
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"ports": [
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{
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"id": "00000000-0000-0000-0000-000000000111",
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"label": "eth0"
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}
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]
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},
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{
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"id": "00000000-0000-0000-0000-000000000102",
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"kind": "pc",
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"ports": [
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{
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"id": "00000000-0000-0000-0000-000000000112",
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"label": "eth0"
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}
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]
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},
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{
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"id": "00000000-0000-0000-0000-000000000103",
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"kind": "pc",
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"ports": [
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{
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"id": "00000000-0000-0000-0000-000000000113",
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"label": "eth0"
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}
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]
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},
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{
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"id": "00000000-0000-0000-0000-000000000104",
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"kind": "networkSwitch",
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"ports": [
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{
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"id": "00000000-0000-0000-0000-000000000121",
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"label": "sw1"
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},
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{
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"id": "00000000-0000-0000-0000-000000000122",
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"label": "sw2"
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},
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{
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"id": "00000000-0000-0000-0000-000000000123",
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"label": "sw3"
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},
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{
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"id": "00000000-0000-0000-0000-000000000124",
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"label": "sw4"
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}
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]
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}
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],
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"links": [
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{
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"id": "00000000-0000-0000-0000-00000000F001",
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"sourceNode": "00000000-0000-0000-0000-000000000101",
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"sourcePort": "00000000-0000-0000-0000-000000000111",
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"targetNode": "00000000-0000-0000-0000-000000000104",
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"targetPort": "00000000-0000-0000-0000-000000000121"
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},
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{
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"id": "00000000-0000-0000-0000-00000000F002",
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"sourceNode": "00000000-0000-0000-0000-000000000102",
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"sourcePort": "00000000-0000-0000-0000-000000000112",
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"targetNode": "00000000-0000-0000-0000-000000000104",
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"targetPort": "00000000-0000-0000-0000-000000000122"
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},
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{
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"id": "00000000-0000-0000-0000-00000000F003",
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"sourceNode": "00000000-0000-0000-0000-000000000103",
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"sourcePort": "00000000-0000-0000-0000-000000000113",
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"targetNode": "00000000-0000-0000-0000-000000000104",
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"targetPort": "00000000-0000-0000-0000-000000000123"
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}
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],
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"devices": {
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"00000000-0000-0000-0000-000000000101": {
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"ip": "192.168.0.10",
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"mask": "255.255.255.0"
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},
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"00000000-0000-0000-0000-000000000102": {
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"ip": "192.168.0.20",
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"mask": "255.255.255.0"
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},
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"00000000-0000-0000-0000-000000000103": {
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"ip": "192.168.0.30",
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"mask": "255.255.255.0"
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}
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},
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"switches": {
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"00000000-0000-0000-0000-000000000104": {
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"ssid": "lab",
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"retention": 5000
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}
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},
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"steps": [
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{
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"op": "openTcpServer",
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"node": "00000000-0000-0000-0000-000000000101",
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"port": 80
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},
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{
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"op": "openTcpServer",
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"node": "00000000-0000-0000-0000-000000000101",
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"port": 80
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},
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{
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"op": "openTcpClient",
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"node": "00000000-0000-0000-0000-000000000102",
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"target": "192.168.0.10",
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"port": 80
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},
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{
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"op": "connectTcp",
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"socket": "00000000-0000-0000-0000-000000000002"
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},
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{
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"op": "acceptedTcp",
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"socket": "00000000-0000-0000-0000-000000000001"
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},
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{
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"op": "peerTcp",
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"socket": "00000000-0000-0000-0000-000000000002"
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},
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{
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"op": "sendTcp",
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"socket": "00000000-0000-0000-0000-000000000002",
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"payload": "GET /"
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},
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{
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"op": "receiveTcp",
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"socket": "00000000-0000-0000-0000-000000000003"
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},
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{
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"op": "sendTcp",
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"socket": "00000000-0000-0000-0000-000000000003",
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"payload": "x",
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"repeatCount": 3000
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},
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{
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"op": "receiveTcp",
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"socket": "00000000-0000-0000-0000-000000000002"
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},
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{
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"op": "receiveTcp",
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"socket": "00000000-0000-0000-0000-000000000002"
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},
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{
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"op": "closeSocket",
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"socket": "00000000-0000-0000-0000-000000000002"
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},
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{
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"op": "advance",
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"to": 3000
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},
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{
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"op": "closeSocket",
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"socket": "00000000-0000-0000-0000-000000000003"
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},
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{
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"op": "advance",
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"to": 4000
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},
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{
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"op": "advance",
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"to": 8000
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},
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{
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"op": "cleanTcp",
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"socket": "00000000-0000-0000-0000-000000000002"
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},
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{
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"op": "cleanTcp",
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"socket": "00000000-0000-0000-0000-000000000001"
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},
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{
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"op": "connectTcp",
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"socket": "00000000-0000-0000-0000-000000000001"
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},
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{
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"op": "openTcpClient",
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"node": "00000000-0000-0000-0000-000000000103",
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"target": "192.168.0.10",
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"port": 81
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},
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{
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"op": "sendTcp",
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"socket": "00000000-0000-0000-0000-000000000004",
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"payload": "ohne Verbindung"
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},
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{
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"op": "connectTcp",
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"socket": "00000000-0000-0000-0000-000000000004"
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},
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{
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"op": "openTcpClient",
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"node": "00000000-0000-0000-0000-000000000103",
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"target": "192.168.0.99",
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"port": 80,
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"localPort": 5000
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},
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{
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"op": "connectTcp",
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"socket": "00000000-0000-0000-0000-000000000005"
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},
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{
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"op": "closeSocket",
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"socket": "00000000-0000-0000-0000-000000000001"
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}
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]
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}
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