// SPDX-License-Identifier: GPL-2.0-or-later
/* SCTP kernel implementation
 * (C) Copyright IBM Corp. 2001, 2004
 * Copyright (c) 1999-2000 Cisco, Inc.
 * Copyright (c) 1999-2001 Motorola, Inc.
 * Copyright (c) 2001 Intel Corp.
 *
 * This file is part of the SCTP kernel implementation
 *
 * This file converts numerical ID value to alphabetical names for SCTP
 * terms such as chunk type, parameter time, event type, etc.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <linux-sctp@vger.kernel.org>
 *
 * Written or modified by:
 *    La Monte H.P. Yarroll <piggy@acm.org>
 *    Karl Knutson          <karl@athena.chicago.il.us>
 *    Xingang Guo           <xingang.guo@intel.com>
 *    Jon Grimm             <jgrimm@us.ibm.com>
 *    Daisy Chang           <daisyc@us.ibm.com>
 *    Sridhar Samudrala     <sri@us.ibm.com>
 */

#include <net/sctp/sctp.h>

/* These are printable forms of Chunk ID's from section 3.1.  */
static const char *const sctp_cid_tbl[SCTP_NUM_BASE_CHUNK_TYPES] = {
        "DATA",
        "INIT",
        "INIT_ACK",
        "SACK",
        "HEARTBEAT",
        "HEARTBEAT_ACK",
        "ABORT",
        "SHUTDOWN",
        "SHUTDOWN_ACK",
        "ERROR",
        "COOKIE_ECHO",
        "COOKIE_ACK",
        "ECN_ECNE",
        "ECN_CWR",
        "SHUTDOWN_COMPLETE",
};

/* Lookup "chunk type" debug name. */
const char *sctp_cname(const union sctp_subtype cid)
{
        if (cid.chunk <= SCTP_CID_BASE_MAX)
                return sctp_cid_tbl[cid.chunk];

        switch (cid.chunk) {
        case SCTP_CID_ASCONF:
                return "ASCONF";

        case SCTP_CID_ASCONF_ACK:
                return "ASCONF_ACK";

        case SCTP_CID_FWD_TSN:
                return "FWD_TSN";

        case SCTP_CID_AUTH:
                return "AUTH";

        case SCTP_CID_RECONF:
                return "RECONF";

        case SCTP_CID_I_DATA:
                return "I_DATA";

        case SCTP_CID_I_FWD_TSN:
                return "I_FWD_TSN";

        default:
                break;
        }

        return "unknown chunk";
}

/* These are printable forms of the states.  */
const char *const sctp_state_tbl[SCTP_STATE_NUM_STATES] = {
        "STATE_CLOSED",
        "STATE_COOKIE_WAIT",
        "STATE_COOKIE_ECHOED",
        "STATE_ESTABLISHED",
        "STATE_SHUTDOWN_PENDING",
        "STATE_SHUTDOWN_SENT",
        "STATE_SHUTDOWN_RECEIVED",
        "STATE_SHUTDOWN_ACK_SENT",
};

/* Events that could change the state of an association.  */
const char *const sctp_evttype_tbl[] = {
        "EVENT_T_unknown",
        "EVENT_T_CHUNK",
        "EVENT_T_TIMEOUT",
        "EVENT_T_OTHER",
        "EVENT_T_PRIMITIVE"
};

/* Return value of a state function */
const char *const sctp_status_tbl[] = {
        "DISPOSITION_DISCARD",
        "DISPOSITION_CONSUME",
        "DISPOSITION_NOMEM",
        "DISPOSITION_DELETE_TCB",
        "DISPOSITION_ABORT",
        "DISPOSITION_VIOLATION",
        "DISPOSITION_NOT_IMPL",
        "DISPOSITION_ERROR",
        "DISPOSITION_BUG"
};

/* Printable forms of primitives */
static const char *const sctp_primitive_tbl[SCTP_NUM_PRIMITIVE_TYPES] = {
        "PRIMITIVE_ASSOCIATE",
        "PRIMITIVE_SHUTDOWN",
        "PRIMITIVE_ABORT",
        "PRIMITIVE_SEND",
        "PRIMITIVE_REQUESTHEARTBEAT",
        "PRIMITIVE_ASCONF",
};

/* Lookup primitive debug name. */
const char *sctp_pname(const union sctp_subtype id)
{
        if (id.primitive <= SCTP_EVENT_PRIMITIVE_MAX)
                return sctp_primitive_tbl[id.primitive];
        return "unknown_primitive";
}

static const char *const sctp_other_tbl[] = {
        "NO_PENDING_TSN",
        "ICMP_PROTO_UNREACH",
};

/* Lookup "other" debug name. */
const char *sctp_oname(const union sctp_subtype id)
{
        if (id.other <= SCTP_EVENT_OTHER_MAX)
                return sctp_other_tbl[id.other];
        return "unknown 'other' event";
}

static const char *const sctp_timer_tbl[] = {
        "TIMEOUT_NONE",
        "TIMEOUT_T1_COOKIE",
        "TIMEOUT_T1_INIT",
        "TIMEOUT_T2_SHUTDOWN",
        "TIMEOUT_T3_RTX",
        "TIMEOUT_T4_RTO",
        "TIMEOUT_T5_SHUTDOWN_GUARD",
        "TIMEOUT_HEARTBEAT",
        "TIMEOUT_RECONF",
        "TIMEOUT_PROBE",
        "TIMEOUT_SACK",
        "TIMEOUT_AUTOCLOSE",
};

/* Lookup timer debug name. */
const char *sctp_tname(const union sctp_subtype id)
{
        BUILD_BUG_ON(SCTP_EVENT_TIMEOUT_MAX + 1 != ARRAY_SIZE(sctp_timer_tbl));

        if (id.timeout < ARRAY_SIZE(sctp_timer_tbl))
                return sctp_timer_tbl[id.timeout];
        return "unknown_timer";
}