1// SPDX-License-Identifier: GPL-2.0-or-later
2/* SCTP kernel implementation
3 * (C) Copyright IBM Corp. 2001, 2004
4 * Copyright (c) 1999-2000 Cisco, Inc.
5 * Copyright (c) 1999-2001 Motorola, Inc.
6 * Copyright (c) 2001 Intel Corp.
7 *
8 * This file is part of the SCTP kernel implementation
9 *
10 * This file converts numerical ID value to alphabetical names for SCTP
11 * terms such as chunk type, parameter time, event type, etc.
12 *
13 * Please send any bug reports or fixes you make to the
14 * email address(es):
15 *    lksctp developers <linux-sctp@vger.kernel.org>
16 *
17 * Written or modified by:
18 *    La Monte H.P. Yarroll <piggy@acm.org>
19 *    Karl Knutson          <karl@athena.chicago.il.us>
20 *    Xingang Guo           <xingang.guo@intel.com>
21 *    Jon Grimm             <jgrimm@us.ibm.com>
22 *    Daisy Chang	    <daisyc@us.ibm.com>
23 *    Sridhar Samudrala	    <sri@us.ibm.com>
24 */
25
26#include <net/sctp/sctp.h>
27
28/* These are printable forms of Chunk ID's from section 3.1.  */
29static const char *const sctp_cid_tbl[SCTP_NUM_BASE_CHUNK_TYPES] = {
30	"DATA",
31	"INIT",
32	"INIT_ACK",
33	"SACK",
34	"HEARTBEAT",
35	"HEARTBEAT_ACK",
36	"ABORT",
37	"SHUTDOWN",
38	"SHUTDOWN_ACK",
39	"ERROR",
40	"COOKIE_ECHO",
41	"COOKIE_ACK",
42	"ECN_ECNE",
43	"ECN_CWR",
44	"SHUTDOWN_COMPLETE",
45};
46
47/* Lookup "chunk type" debug name. */
48const char *sctp_cname(const union sctp_subtype cid)
49{
50	if (cid.chunk <= SCTP_CID_BASE_MAX)
51		return sctp_cid_tbl[cid.chunk];
52
53	switch (cid.chunk) {
54	case SCTP_CID_ASCONF:
55		return "ASCONF";
56
57	case SCTP_CID_ASCONF_ACK:
58		return "ASCONF_ACK";
59
60	case SCTP_CID_FWD_TSN:
61		return "FWD_TSN";
62
63	case SCTP_CID_AUTH:
64		return "AUTH";
65
66	case SCTP_CID_RECONF:
67		return "RECONF";
68
69	case SCTP_CID_I_DATA:
70		return "I_DATA";
71
72	case SCTP_CID_I_FWD_TSN:
73		return "I_FWD_TSN";
74
75	default:
76		break;
77	}
78
79	return "unknown chunk";
80}
81
82/* These are printable forms of the states.  */
83const char *const sctp_state_tbl[SCTP_STATE_NUM_STATES] = {
84	"STATE_CLOSED",
85	"STATE_COOKIE_WAIT",
86	"STATE_COOKIE_ECHOED",
87	"STATE_ESTABLISHED",
88	"STATE_SHUTDOWN_PENDING",
89	"STATE_SHUTDOWN_SENT",
90	"STATE_SHUTDOWN_RECEIVED",
91	"STATE_SHUTDOWN_ACK_SENT",
92};
93
94/* Events that could change the state of an association.  */
95const char *const sctp_evttype_tbl[] = {
96	"EVENT_T_unknown",
97	"EVENT_T_CHUNK",
98	"EVENT_T_TIMEOUT",
99	"EVENT_T_OTHER",
100	"EVENT_T_PRIMITIVE"
101};
102
103/* Return value of a state function */
104const char *const sctp_status_tbl[] = {
105	"DISPOSITION_DISCARD",
106	"DISPOSITION_CONSUME",
107	"DISPOSITION_NOMEM",
108	"DISPOSITION_DELETE_TCB",
109	"DISPOSITION_ABORT",
110	"DISPOSITION_VIOLATION",
111	"DISPOSITION_NOT_IMPL",
112	"DISPOSITION_ERROR",
113	"DISPOSITION_BUG"
114};
115
116/* Printable forms of primitives */
117static const char *const sctp_primitive_tbl[SCTP_NUM_PRIMITIVE_TYPES] = {
118	"PRIMITIVE_ASSOCIATE",
119	"PRIMITIVE_SHUTDOWN",
120	"PRIMITIVE_ABORT",
121	"PRIMITIVE_SEND",
122	"PRIMITIVE_REQUESTHEARTBEAT",
123	"PRIMITIVE_ASCONF",
124};
125
126/* Lookup primitive debug name. */
127const char *sctp_pname(const union sctp_subtype id)
128{
129	if (id.primitive <= SCTP_EVENT_PRIMITIVE_MAX)
130		return sctp_primitive_tbl[id.primitive];
131	return "unknown_primitive";
132}
133
134static const char *const sctp_other_tbl[] = {
135	"NO_PENDING_TSN",
136	"ICMP_PROTO_UNREACH",
137};
138
139/* Lookup "other" debug name. */
140const char *sctp_oname(const union sctp_subtype id)
141{
142	if (id.other <= SCTP_EVENT_OTHER_MAX)
143		return sctp_other_tbl[id.other];
144	return "unknown 'other' event";
145}
146
147static const char *const sctp_timer_tbl[] = {
148	"TIMEOUT_NONE",
149	"TIMEOUT_T1_COOKIE",
150	"TIMEOUT_T1_INIT",
151	"TIMEOUT_T2_SHUTDOWN",
152	"TIMEOUT_T3_RTX",
153	"TIMEOUT_T4_RTO",
154	"TIMEOUT_T5_SHUTDOWN_GUARD",
155	"TIMEOUT_HEARTBEAT",
156	"TIMEOUT_RECONF",
157	"TIMEOUT_PROBE",
158	"TIMEOUT_SACK",
159	"TIMEOUT_AUTOCLOSE",
160};
161
162/* Lookup timer debug name. */
163const char *sctp_tname(const union sctp_subtype id)
164{
165	BUILD_BUG_ON(SCTP_EVENT_TIMEOUT_MAX + 1 != ARRAY_SIZE(sctp_timer_tbl));
166
167	if (id.timeout < ARRAY_SIZE(sctp_timer_tbl))
168		return sctp_timer_tbl[id.timeout];
169	return "unknown_timer";
170}
171