Quelle tipc.h Sprache: C

/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/*
* include/uapi/linux/tipc.h: Header for TIPC socket interface
*
* Copyright (c) 2003-2006, 2015-2016 Ericsson AB
* Copyright (c) 2005, 2010-2011, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
*    contributors may be used to endorse or promote products derived from
*    this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef _LINUX_TIPC_H_
#define _LINUX_TIPC_H_

#include <linux/types.h>
#include <linux/sockios.h>

/*
* TIPC addressing primitives
*/

struct tipc_socket_addr {
__u32 ref;
__u32 node;
};

struct tipc_service_addr {
__u32 type;
__u32 instance;
};

struct tipc_service_range {
__u32 type;
__u32 lower;
__u32 upper;
};

/*
* Application-accessible service types
*/

#define TIPC_NODE_STATE  0 /* node state service type */
#define TIPC_TOP_SRV  1 /* topology server service type */
#define TIPC_LINK_STATE  2 /* link state service type */
#define TIPC_RESERVED_TYPES 64 /* lowest user-allowed service type */

/*
* Publication scopes when binding service / service range
*/
enum tipc_scope {
TIPC_CLUSTER_SCOPE = 2, /* 0 can also be used */
TIPC_NODE_SCOPE    = 3
};

/*
* Limiting values for messages
*/

#define TIPC_MAX_USER_MSG_SIZE 66000U

/*
* Message importance levels
*/

#define TIPC_LOW_IMPORTANCE  0
#define TIPC_MEDIUM_IMPORTANCE  1
#define TIPC_HIGH_IMPORTANCE  2
#define TIPC_CRITICAL_IMPORTANCE 3

/*
* Msg rejection/connection shutdown reasons
*/

#define TIPC_OK   0
#define TIPC_ERR_NO_NAME 1
#define TIPC_ERR_NO_PORT 2
#define TIPC_ERR_NO_NODE 3
#define TIPC_ERR_OVERLOAD 4
#define TIPC_CONN_SHUTDOWN 5

/*
* TIPC topology subscription service definitions
*/

#define TIPC_SUB_PORTS          0x01    /* filter: evt at each match */
#define TIPC_SUB_SERVICE        0x02    /* filter: evt at first up/last down */
#define TIPC_SUB_CANCEL         0x04    /* filter: cancel a subscription */

#define TIPC_WAIT_FOREVER (~0) /* timeout for permanent subscription */

struct tipc_subscr {
struct tipc_service_range seq; /* range of interest */
__u32 timeout;   /* subscription duration (in ms) */
__u32 filter;   /* bitmask of filter options */
char usr_handle[8];  /* available for subscriber use */
};

#define TIPC_PUBLISHED  1 /* publication event */
#define TIPC_WITHDRAWN  2 /* withdrawal event */
#define TIPC_SUBSCR_TIMEOUT 3 /* subscription timeout event */

struct tipc_event {
__u32 event;   /* event type */
__u32 found_lower;  /* matching range */
__u32 found_upper;  /*    "      "    */
struct tipc_socket_addr port; /* associated socket */
struct tipc_subscr s;  /* associated subscription */
};

/*
* Socket API
*/

#ifndef AF_TIPC
#define AF_TIPC  30
#endif

#ifndef PF_TIPC
#define PF_TIPC  AF_TIPC
#endif

#ifndef SOL_TIPC
#define SOL_TIPC 271
#endif

#define TIPC_ADDR_MCAST         1
#define TIPC_SERVICE_RANGE      1
#define TIPC_SERVICE_ADDR       2
#define TIPC_SOCKET_ADDR        3

struct sockaddr_tipc {
unsigned short family;
unsigned char  addrtype;
signed   char  scope;
union {
  struct tipc_socket_addr id;
  struct tipc_service_range nameseq;
  struct {
   struct tipc_service_addr name;
   __u32 domain;
  } name;
} addr;
};

/*
* Ancillary data objects supported by recvmsg()
*/

#define TIPC_ERRINFO 1 /* error info */
#define TIPC_RETDATA 2 /* returned data */
#define TIPC_DESTNAME 3 /* destination name */

/*
* TIPC-specific socket option names
*/

#define TIPC_IMPORTANCE  127 /* Default: TIPC_LOW_IMPORTANCE */
#define TIPC_SRC_DROPPABLE 128 /* Default: based on socket type */
#define TIPC_DEST_DROPPABLE 129 /* Default: based on socket type */
#define TIPC_CONN_TIMEOUT 130 /* Default: 8000 (ms)  */
#define TIPC_NODE_RECVQ_DEPTH 131 /* Default: none (read only) */
#define TIPC_SOCK_RECVQ_DEPTH 132 /* Default: none (read only) */
#define TIPC_MCAST_BROADCAST    133     /* Default: TIPC selects. No arg */
#define TIPC_MCAST_REPLICAST    134     /* Default: TIPC selects. No arg */
#define TIPC_GROUP_JOIN         135     /* Takes struct tipc_group_req* */
#define TIPC_GROUP_LEAVE        136     /* No argument */
#define TIPC_SOCK_RECVQ_USED    137     /* Default: none (read only) */
#define TIPC_NODELAY            138     /* Default: false */

/*
* Flag values
*/
#define TIPC_GROUP_LOOPBACK     0x1  /* Receive copy of sent msg when match */
#define TIPC_GROUP_MEMBER_EVTS  0x2  /* Receive membership events in socket */

struct tipc_group_req {
__u32 type;      /* group id */
__u32 instance;  /* member id */
__u32 scope;     /* cluster/node */
__u32 flags;
};

/*
* Maximum sizes of TIPC bearer-related names (including terminating NULL)
* The string formatting for each name element is:
* media: media
* interface: media:interface name
* link: node:interface-node:interface
*/
#define TIPC_NODEID_LEN         16
#define TIPC_MAX_MEDIA_NAME 16
#define TIPC_MAX_IF_NAME 16
#define TIPC_MAX_BEARER_NAME 32
#define TIPC_MAX_LINK_NAME 68

#define SIOCGETLINKNAME        SIOCPROTOPRIVATE
#define SIOCGETNODEID          (SIOCPROTOPRIVATE + 1)

struct tipc_sioc_ln_req {
__u32 peer;
__u32 bearer_id;
char linkname[TIPC_MAX_LINK_NAME];
};

struct tipc_sioc_nodeid_req {
__u32 peer;
char node_id[TIPC_NODEID_LEN];
};

/*
* TIPC Crypto, AEAD
*/
#define TIPC_AEAD_ALG_NAME  (32)

struct tipc_aead_key {
char alg_name[TIPC_AEAD_ALG_NAME];
unsigned int keylen; /* in bytes */
char key[];
};

#define TIPC_AEAD_KEYLEN_MIN  (16 + 4)
#define TIPC_AEAD_KEYLEN_MAX  (32 + 4)
#define TIPC_AEAD_KEY_SIZE_MAX  (sizeof(struct tipc_aead_key) + \
       TIPC_AEAD_KEYLEN_MAX)

static inline int tipc_aead_key_size(struct tipc_aead_key *key)
{
return sizeof(*key) + key->keylen;
}

#define TIPC_REKEYING_NOW  (~0U)

/* The macros and functions below are deprecated:
*/

#define TIPC_CFG_SRV  0
#define TIPC_ZONE_SCOPE         1

#define TIPC_ADDR_NAMESEQ 1
#define TIPC_ADDR_NAME  2
#define TIPC_ADDR_ID  3

#define TIPC_NODE_BITS          12
#define TIPC_CLUSTER_BITS       12
#define TIPC_ZONE_BITS          8

#define TIPC_NODE_OFFSET        0
#define TIPC_CLUSTER_OFFSET     TIPC_NODE_BITS
#define TIPC_ZONE_OFFSET        (TIPC_CLUSTER_OFFSET + TIPC_CLUSTER_BITS)

#define TIPC_NODE_SIZE          ((1UL << TIPC_NODE_BITS) - 1)
#define TIPC_CLUSTER_SIZE       ((1UL << TIPC_CLUSTER_BITS) - 1)
#define TIPC_ZONE_SIZE          ((1UL << TIPC_ZONE_BITS) - 1)

#define TIPC_NODE_MASK  (TIPC_NODE_SIZE << TIPC_NODE_OFFSET)
#define TIPC_CLUSTER_MASK (TIPC_CLUSTER_SIZE << TIPC_CLUSTER_OFFSET)
#define TIPC_ZONE_MASK  (TIPC_ZONE_SIZE << TIPC_ZONE_OFFSET)

#define TIPC_ZONE_CLUSTER_MASK (TIPC_ZONE_MASK | TIPC_CLUSTER_MASK)

#define tipc_portid tipc_socket_addr
#define tipc_name tipc_service_addr
#define tipc_name_seq tipc_service_range

static inline __u32 tipc_addr(unsigned int zone,
         unsigned int cluster,
         unsigned int node)
{
return (zone << TIPC_ZONE_OFFSET) |
  (cluster << TIPC_CLUSTER_OFFSET) |
  node;
}

static inline unsigned int tipc_zone(__u32 addr)
{
return addr >> TIPC_ZONE_OFFSET;
}

static inline unsigned int tipc_cluster(__u32 addr)
{
return (addr & TIPC_CLUSTER_MASK) >> TIPC_CLUSTER_OFFSET;
}

static inline unsigned int tipc_node(__u32 addr)
{
return addr & TIPC_NODE_MASK;
}

#endif

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