net/sctp/debug.c

   1 /* SCTP kernel implementation
   2  * (C) Copyright IBM Corp. 2001, 2004
   3  * Copyright (c) 1999-2000 Cisco, Inc.
   4  * Copyright (c) 1999-2001 Motorola, Inc.
   5  * Copyright (c) 2001 Intel Corp.
   6  *
   7  * This file is part of the SCTP kernel implementation
   8  *
   9  * This file converts numerical ID value to alphabetical names for SCTP
  10  * terms such as chunk type, parameter time, event type, etc.
  11  *
  12  * This SCTP implementation is free software;
  13  * you can redistribute it and/or modify it under the terms of
  14  * the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * This SCTP implementation is distributed in the hope that it
  19  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  20  *                 ************************
  21  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  22  * See the GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with GNU CC; see the file COPYING.  If not, see
  26  * <http://www.gnu.org/licenses/>.
  27  *
  28  * Please send any bug reports or fixes you make to the
  29  * email address(es):
  30  *    lksctp developers <linux-sctp@vger.kernel.org>
  31  *
  32  * Written or modified by:
  33  *    La Monte H.P. Yarroll <piggy@acm.org>
  34  *    Karl Knutson          <karl@athena.chicago.il.us>
  35  *    Xingang Guo           <xingang.guo@intel.com>
  36  *    Jon Grimm             <jgrimm@us.ibm.com>
  37  *    Daisy Chang           <daisyc@us.ibm.com>
  38  *    Sridhar Samudrala     <sri@us.ibm.com>
  39  */
  40
  41 #include <net/sctp/sctp.h>
  42
  43 /* These are printable forms of Chunk ID's from section 3.1.  */
  44 static const char *const sctp_cid_tbl[SCTP_NUM_BASE_CHUNK_TYPES] = {
  45         "DATA",
  46         "INIT",
  47         "INIT_ACK",
  48         "SACK",
  49         "HEARTBEAT",
  50         "HEARTBEAT_ACK",
  51         "ABORT",
  52         "SHUTDOWN",
  53         "SHUTDOWN_ACK",
  54         "ERROR",
  55         "COOKIE_ECHO",
  56         "COOKIE_ACK",
  57         "ECN_ECNE",
  58         "ECN_CWR",
  59         "SHUTDOWN_COMPLETE",
  60 };
  61
  62 /* Lookup "chunk type" debug name. */
  63 const char *sctp_cname(const union sctp_subtype cid)
  64 {
  65         if (cid.chunk <= SCTP_CID_BASE_MAX)
  66                 return sctp_cid_tbl[cid.chunk];
  67
  68         switch (cid.chunk) {
  69         case SCTP_CID_ASCONF:
  70                 return "ASCONF";
  71
  72         case SCTP_CID_ASCONF_ACK:
  73                 return "ASCONF_ACK";
  74
  75         case SCTP_CID_FWD_TSN:
  76                 return "FWD_TSN";
  77
  78         case SCTP_CID_AUTH:
  79                 return "AUTH";
  80
  81         case SCTP_CID_RECONF:
  82                 return "RECONF";
  83
  84         default:
  85                 break;
  86         }
  87
  88         return "unknown chunk";
  89 }
  90
  91 /* These are printable forms of the states.  */
  92 const char *const sctp_state_tbl[SCTP_STATE_NUM_STATES] = {
  93         "STATE_CLOSED",
  94         "STATE_COOKIE_WAIT",
  95         "STATE_COOKIE_ECHOED",
  96         "STATE_ESTABLISHED",
  97         "STATE_SHUTDOWN_PENDING",
  98         "STATE_SHUTDOWN_SENT",
  99         "STATE_SHUTDOWN_RECEIVED",
 100         "STATE_SHUTDOWN_ACK_SENT",
 101 };
 102
 103 /* Events that could change the state of an association.  */
 104 const char *const sctp_evttype_tbl[] = {
 105         "EVENT_T_unknown",
 106         "EVENT_T_CHUNK",
 107         "EVENT_T_TIMEOUT",
 108         "EVENT_T_OTHER",
 109         "EVENT_T_PRIMITIVE"
 110 };
 111
 112 /* Return value of a state function */
 113 const char *const sctp_status_tbl[] = {
 114         "DISPOSITION_DISCARD",
 115         "DISPOSITION_CONSUME",
 116         "DISPOSITION_NOMEM",
 117         "DISPOSITION_DELETE_TCB",
 118         "DISPOSITION_ABORT",
 119         "DISPOSITION_VIOLATION",
 120         "DISPOSITION_NOT_IMPL",
 121         "DISPOSITION_ERROR",
 122         "DISPOSITION_BUG"
 123 };
 124
 125 /* Printable forms of primitives */
 126 static const char *const sctp_primitive_tbl[SCTP_NUM_PRIMITIVE_TYPES] = {
 127         "PRIMITIVE_ASSOCIATE",
 128         "PRIMITIVE_SHUTDOWN",
 129         "PRIMITIVE_ABORT",
 130         "PRIMITIVE_SEND",
 131         "PRIMITIVE_REQUESTHEARTBEAT",
 132         "PRIMITIVE_ASCONF",
 133 };
 134
 135 /* Lookup primitive debug name. */
 136 const char *sctp_pname(const union sctp_subtype id)
 137 {
 138         if (id.primitive <= SCTP_EVENT_PRIMITIVE_MAX)
 139                 return sctp_primitive_tbl[id.primitive];
 140         return "unknown_primitive";
 141 }
 142
 143 static const char *const sctp_other_tbl[] = {
 144         "NO_PENDING_TSN",
 145         "ICMP_PROTO_UNREACH",
 146 };
 147
 148 /* Lookup "other" debug name. */
 149 const char *sctp_oname(const union sctp_subtype id)
 150 {
 151         if (id.other <= SCTP_EVENT_OTHER_MAX)
 152                 return sctp_other_tbl[id.other];
 153         return "unknown 'other' event";
 154 }
 155
 156 static const char *const sctp_timer_tbl[] = {
 157         "TIMEOUT_NONE",
 158         "TIMEOUT_T1_COOKIE",
 159         "TIMEOUT_T1_INIT",
 160         "TIMEOUT_T2_SHUTDOWN",
 161         "TIMEOUT_T3_RTX",
 162         "TIMEOUT_T4_RTO",
 163         "TIMEOUT_T5_SHUTDOWN_GUARD",
 164         "TIMEOUT_HEARTBEAT",
 165         "TIMEOUT_RECONF",
 166         "TIMEOUT_SACK",
 167         "TIMEOUT_AUTOCLOSE",
 168 };
 169
 170 /* Lookup timer debug name. */
 171 const char *sctp_tname(const union sctp_subtype id)
 172 {
 173         BUILD_BUG_ON(SCTP_EVENT_TIMEOUT_MAX + 1 != ARRAY_SIZE(sctp_timer_tbl));
 174
 175         if (id.timeout < ARRAY_SIZE(sctp_timer_tbl))
 176                 return sctp_timer_tbl[id.timeout];
 177         return "unknown_timer";
 178 }