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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227

use thiserror::Error;

pub type Result<T> = std::result::Result<T, Error>;

/// Errors triggered during SCTP association operation
#[derive(Debug, Error, Eq, Clone, PartialEq)]
#[non_exhaustive]
pub enum Error {
    #[error("raw is too small for a SCTP chunk")]
    ErrChunkHeaderTooSmall,
    #[error("not enough data left in SCTP packet to satisfy requested length")]
    ErrChunkHeaderNotEnoughSpace,
    #[error("chunk PADDING is non-zero at offset")]
    ErrChunkHeaderPaddingNonZero,
    #[error("chunk has invalid length")]
    ErrChunkHeaderInvalidLength,

    #[error("ChunkType is not of type ABORT")]
    ErrChunkTypeNotAbort,
    #[error("failed build Abort Chunk")]
    ErrBuildAbortChunkFailed,
    #[error("ChunkType is not of type COOKIEACK")]
    ErrChunkTypeNotCookieAck,
    #[error("ChunkType is not of type COOKIEECHO")]
    ErrChunkTypeNotCookieEcho,
    #[error("ChunkType is not of type ctError")]
    ErrChunkTypeNotCt,
    #[error("failed build Error Chunk")]
    ErrBuildErrorChunkFailed,
    #[error("failed to marshal stream")]
    ErrMarshalStreamFailed,
    #[error("chunk too short")]
    ErrChunkTooShort,
    #[error("ChunkType is not of type ForwardTsn")]
    ErrChunkTypeNotForwardTsn,
    #[error("ChunkType is not of type HEARTBEAT")]
    ErrChunkTypeNotHeartbeat,
    #[error("ChunkType is not of type HEARTBEATACK")]
    ErrChunkTypeNotHeartbeatAck,
    #[error("heartbeat is not long enough to contain Heartbeat Info")]
    ErrHeartbeatNotLongEnoughInfo,
    #[error("failed to parse param type")]
    ErrParseParamTypeFailed,
    #[error("heartbeat should only have HEARTBEAT param")]
    ErrHeartbeatParam,
    #[error("failed unmarshalling param in Heartbeat Chunk")]
    ErrHeartbeatChunkUnmarshal,
    #[error("unimplemented")]
    ErrUnimplemented,
    #[error("heartbeat Ack must have one param")]
    ErrHeartbeatAckParams,
    #[error("heartbeat Ack must have one param, and it should be a HeartbeatInfo")]
    ErrHeartbeatAckNotHeartbeatInfo,
    #[error("unable to marshal parameter for Heartbeat Ack")]
    ErrHeartbeatAckMarshalParam,

    #[error("raw is too small for error cause")]
    ErrErrorCauseTooSmall,

    #[error("unhandled ParamType")]
    ErrParamTypeUnhandled,

    #[error("unexpected ParamType")]
    ErrParamTypeUnexpected,

    #[error("param header too short")]
    ErrParamHeaderTooShort,
    #[error("param self reported length is shorter than header length")]
    ErrParamHeaderSelfReportedLengthShorter,
    #[error("param self reported length is longer than header length")]
    ErrParamHeaderSelfReportedLengthLonger,
    #[error("failed to parse param type")]
    ErrParamHeaderParseFailed,

    #[error("packet to short")]
    ErrParamPacketTooShort,
    #[error("outgoing SSN reset request parameter too short")]
    ErrSsnResetRequestParamTooShort,
    #[error("reconfig response parameter too short")]
    ErrReconfigRespParamTooShort,
    #[error("invalid algorithm type")]
    ErrInvalidAlgorithmType,

    #[error("failed to parse param type")]
    ErrInitChunkParseParamTypeFailed,
    #[error("failed unmarshalling param in Init Chunk")]
    ErrInitChunkUnmarshalParam,
    #[error("unable to marshal parameter for INIT/INITACK")]
    ErrInitAckMarshalParam,

    #[error("ChunkType is not of type INIT")]
    ErrChunkTypeNotTypeInit,
    #[error("chunk Value isn't long enough for mandatory parameters exp")]
    ErrChunkValueNotLongEnough,
    #[error("ChunkType of type INIT flags must be all 0")]
    ErrChunkTypeInitFlagZero,
    #[error("failed to unmarshal INIT body")]
    ErrChunkTypeInitUnmarshalFailed,
    #[error("failed marshaling INIT common data")]
    ErrChunkTypeInitMarshalFailed,
    #[error("ChunkType of type INIT ACK InitiateTag must not be 0")]
    ErrChunkTypeInitInitiateTagZero,
    #[error("INIT ACK inbound stream request must be > 0")]
    ErrInitInboundStreamRequestZero,
    #[error("INIT ACK outbound stream request must be > 0")]
    ErrInitOutboundStreamRequestZero,
    #[error("INIT ACK Advertised Receiver Window Credit (a_rwnd) must be >= 1500")]
    ErrInitAdvertisedReceiver1500,

    #[error("packet is smaller than the header size")]
    ErrChunkPayloadSmall,
    #[error("ChunkType is not of type PayloadData")]
    ErrChunkTypeNotPayloadData,
    #[error("ChunkType is not of type Reconfig")]
    ErrChunkTypeNotReconfig,
    #[error("ChunkReconfig has invalid ParamA")]
    ErrChunkReconfigInvalidParamA,

    #[error("failed to parse param type")]
    ErrChunkParseParamTypeFailed,
    #[error("unable to marshal parameter A for reconfig")]
    ErrChunkMarshalParamAReconfigFailed,
    #[error("unable to marshal parameter B for reconfig")]
    ErrChunkMarshalParamBReconfigFailed,

    #[error("ChunkType is not of type SACK")]
    ErrChunkTypeNotSack,
    #[error("SACK Chunk size is not large enough to contain header")]
    ErrSackSizeNotLargeEnoughInfo,

    #[error("invalid chunk size")]
    ErrInvalidChunkSize,
    #[error("ChunkType is not of type SHUTDOWN")]
    ErrChunkTypeNotShutdown,

    #[error("ChunkType is not of type SHUTDOWN-ACK")]
    ErrChunkTypeNotShutdownAck,
    #[error("ChunkType is not of type SHUTDOWN-COMPLETE")]
    ErrChunkTypeNotShutdownComplete,

    #[error("raw is smaller than the minimum length for a SCTP packet")]
    ErrPacketRawTooSmall,
    #[error("unable to parse SCTP chunk, not enough data for complete header")]
    ErrParseSctpChunkNotEnoughData,
    #[error("failed to unmarshal, contains unknown chunk type")]
    ErrUnmarshalUnknownChunkType,
    #[error("checksum mismatch theirs")]
    ErrChecksumMismatch,

    #[error("unexpected chunk popped (unordered)")]
    ErrUnexpectedChuckPoppedUnordered,
    #[error("unexpected chunk popped (ordered)")]
    ErrUnexpectedChuckPoppedOrdered,
    #[error("unexpected q state (should've been selected)")]
    ErrUnexpectedQState,
    #[error("try again")]
    ErrTryAgain,

    #[error("abort chunk, with following errors: {0}")]
    ErrAbortChunk(String),
    #[error("shutdown called in non-Established state")]
    ErrShutdownNonEstablished,
    #[error("association closed before connecting")]
    ErrAssociationClosedBeforeConn,
    #[error("association init failed")]
    ErrAssociationInitFailed,
    #[error("association handshake closed")]
    ErrAssociationHandshakeClosed,
    #[error("silently discard")]
    ErrSilentlyDiscard,
    #[error("the init not stored to send")]
    ErrInitNotStoredToSend,
    #[error("cookieEcho not stored to send")]
    ErrCookieEchoNotStoredToSend,
    #[error("sctp packet must not have a source port of 0")]
    ErrSctpPacketSourcePortZero,
    #[error("sctp packet must not have a destination port of 0")]
    ErrSctpPacketDestinationPortZero,
    #[error("init chunk must not be bundled with any other chunk")]
    ErrInitChunkBundled,
    #[error("init chunk expects a verification tag of 0 on the packet when out-of-the-blue")]
    ErrInitChunkVerifyTagNotZero,
    #[error("todo: handle Init when in state")]
    ErrHandleInitState,
    #[error("no cookie in InitAck")]
    ErrInitAckNoCookie,
    #[error("there already exists a stream with identifier")]
    ErrStreamAlreadyExist,
    #[error("Failed to create a stream with identifier")]
    ErrStreamCreateFailed,
    #[error("unable to be popped from inflight queue TSN")]
    ErrInflightQueueTsnPop,
    #[error("requested non-existent TSN")]
    ErrTsnRequestNotExist,
    #[error("sending reset packet in non-Established state")]
    ErrResetPacketInStateNotExist,
    #[error("unexpected parameter type")]
    ErrParameterType,
    #[error("sending payload data in non-Established state")]
    ErrPayloadDataStateNotExist,
    #[error("unhandled chunk type")]
    ErrChunkTypeUnhandled,
    #[error("handshake failed (INIT ACK)")]
    ErrHandshakeInitAck,
    #[error("handshake failed (COOKIE ECHO)")]
    ErrHandshakeCookieEcho,

    #[error("outbound packet larger than maximum message size")]
    ErrOutboundPacketTooLarge,
    #[error("Stream closed")]
    ErrStreamClosed,
    #[error("Stream not existed")]
    ErrStreamNotExisted,
    #[error("Short buffer to be filled")]
    ErrShortBuffer,
    #[error("Io EOF")]
    ErrEof,
    #[error("Invalid SystemTime")]
    ErrInvalidSystemTime,
    #[error("Net Conn read error")]
    ErrNetConnRead,
    #[error("Max Data Channel ID")]
    ErrMaxDataChannelID,

    #[error("{0}")]
    Other(String),
}