/*
   * include/uapi/linux/tipc_config.h: Header for TIPC configuration interface
   *
   * Copyright (c) 2003-2006, Ericsson AB
   * Copyright (c) 2005-2007, 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_CONFIG_H_
  #define _LINUX_TIPC_CONFIG_H_
  
  #include <linux/types.h>
  #include <linux/string.h>
  #include <linux/tipc.h>
  #include <asm/byteorder.h>
  
  #ifndef __KERNEL__
  #include <arpa/inet.h> /* for ntohs etc. */
  #endif
  
  /*
   * Configuration
   *
   * All configuration management messaging involves sending a request message
   * to the TIPC configuration service on a node, which sends a reply message
   * back.  (In the future multi-message replies may be supported.)
   *
   * Both request and reply messages consist of a transport header and payload.
   * The transport header contains info about the desired operation;
   * the payload consists of zero or more type/length/value (TLV) items
   * which specify parameters or results for the operation.
   *
   * For many operations, the request and reply messages have a fixed number
   * of TLVs (usually zero or one); however, some reply messages may return
   * a variable number of TLVs.  A failed request is denoted by the presence
   * of an "error string" TLV in the reply message instead of the TLV(s) the
   * reply should contain if the request succeeds.
   */
  
  /*
   * Public commands:
   * May be issued by any process.
   * Accepted by own node, or by remote node only if remote management enabled.
   */
  
  #define  TIPC_CMD_NOOP              0x0000    /* tx none, rx none */
  #define  TIPC_CMD_GET_NODES         0x0001    /* tx net_addr, rx node_info(s) */
  #define  TIPC_CMD_GET_MEDIA_NAMES   0x0002    /* tx none, rx media_name(s) */
  #define  TIPC_CMD_GET_BEARER_NAMES  0x0003    /* tx none, rx bearer_name(s) */
  #define  TIPC_CMD_GET_LINKS         0x0004    /* tx net_addr, rx link_info(s) */
  #define  TIPC_CMD_SHOW_NAME_TABLE   0x0005    /* tx name_tbl_query, rx ultra_string */
  #define  TIPC_CMD_SHOW_PORTS        0x0006    /* tx none, rx ultra_string */
  #define  TIPC_CMD_SHOW_LINK_STATS   0x000B    /* tx link_name, rx ultra_string */
  #define  TIPC_CMD_SHOW_STATS        0x000F    /* tx unsigned, rx ultra_string */
  
  /*
   * Protected commands:
   * May only be issued by "network administration capable" process.
   * Accepted by own node, or by remote node only if remote management enabled
   * and this node is zone manager.
   */
  
  #define  TIPC_CMD_GET_REMOTE_MNG    0x4003    /* tx none, rx unsigned */
  #define  TIPC_CMD_GET_MAX_PORTS     0x4004    /* tx none, rx unsigned */
  #define  TIPC_CMD_GET_MAX_PUBL      0x4005    /* obsoleted */
  #define  TIPC_CMD_GET_MAX_SUBSCR    0x4006    /* obsoleted */
  #define  TIPC_CMD_GET_MAX_ZONES     0x4007    /* obsoleted */
  #define  TIPC_CMD_GET_MAX_CLUSTERS  0x4008    /* obsoleted */
  #define  TIPC_CMD_GET_MAX_NODES     0x4009    /* obsoleted */
  #define  TIPC_CMD_GET_MAX_SLAVES    0x400A    /* obsoleted */
  #define  TIPC_CMD_GET_NETID         0x400B    /* tx none, rx unsigned */
  
  #define  TIPC_CMD_ENABLE_BEARER     0x4101    /* tx bearer_config, rx none */
  #define  TIPC_CMD_DISABLE_BEARER    0x4102    /* tx bearer_name, rx none */
  #define  TIPC_CMD_SET_LINK_TOL      0x4107    /* tx link_config, rx none */
  #define  TIPC_CMD_SET_LINK_PRI      0x4108    /* tx link_config, rx none */
  #define  TIPC_CMD_SET_LINK_WINDOW   0x4109    /* tx link_config, rx none */
  #define  TIPC_CMD_SET_LOG_SIZE      0x410A    /* obsoleted */
  #define  TIPC_CMD_DUMP_LOG          0x410B    /* obsoleted */
  #define  TIPC_CMD_RESET_LINK_STATS  0x410C    /* tx link_name, rx none */
  
  /*
   * Private commands:
   * May only be issued by "network administration capable" process.
   * Accepted by own node only; cannot be used on a remote node.
   */
  
  #define  TIPC_CMD_SET_NODE_ADDR     0x8001    /* tx net_addr, rx none */
  #define  TIPC_CMD_SET_REMOTE_MNG    0x8003    /* tx unsigned, rx none */
  #define  TIPC_CMD_SET_MAX_PORTS     0x8004    /* tx unsigned, rx none */
  #define  TIPC_CMD_SET_MAX_PUBL      0x8005    /* obsoleted */
  #define  TIPC_CMD_SET_MAX_SUBSCR    0x8006    /* obsoleted */
  #define  TIPC_CMD_SET_MAX_ZONES     0x8007    /* obsoleted */
  #define  TIPC_CMD_SET_MAX_CLUSTERS  0x8008    /* obsoleted */
  #define  TIPC_CMD_SET_MAX_NODES     0x8009    /* obsoleted */
  #define  TIPC_CMD_SET_MAX_SLAVES    0x800A    /* obsoleted */
  #define  TIPC_CMD_SET_NETID         0x800B    /* tx unsigned, rx none */
  
  /*
   * Reserved commands:
   * May not be issued by any process.
   * Used internally by TIPC.
   */
  
  #define  TIPC_CMD_NOT_NET_ADMIN     0xC001    /* tx none, rx none */
  
  /*
   * TLV types defined for TIPC
   */
  
  #define TIPC_TLV_NONE		0	/* no TLV present */
  #define TIPC_TLV_VOID		1	/* empty TLV (0 data bytes)*/
  #define TIPC_TLV_UNSIGNED	2	/* 32-bit integer */
  #define TIPC_TLV_STRING		3	/* char[128] (max) */
  #define TIPC_TLV_LARGE_STRING	4	/* char[2048] (max) */
  #define TIPC_TLV_ULTRA_STRING	5	/* char[32768] (max) */
  
  #define TIPC_TLV_ERROR_STRING	16	/* char[128] containing "error code" */
  #define TIPC_TLV_NET_ADDR	17	/* 32-bit integer denoting <Z.C.N> */
  #define TIPC_TLV_MEDIA_NAME	18	/* char[TIPC_MAX_MEDIA_NAME] */
  #define TIPC_TLV_BEARER_NAME	19	/* char[TIPC_MAX_BEARER_NAME] */
  #define TIPC_TLV_LINK_NAME	20	/* char[TIPC_MAX_LINK_NAME] */
  #define TIPC_TLV_NODE_INFO	21	/* struct tipc_node_info */
  #define TIPC_TLV_LINK_INFO	22	/* struct tipc_link_info */
  #define TIPC_TLV_BEARER_CONFIG	23	/* struct tipc_bearer_config */
  #define TIPC_TLV_LINK_CONFIG	24	/* struct tipc_link_config */
  #define TIPC_TLV_NAME_TBL_QUERY	25	/* struct tipc_name_table_query */
  #define TIPC_TLV_PORT_REF	26	/* 32-bit port reference */
  
  /*
   * Link priority limits (min, default, max, media default)
   */
  
  #define TIPC_MIN_LINK_PRI	0
  #define TIPC_DEF_LINK_PRI	10
  #define TIPC_MAX_LINK_PRI	31
  #define TIPC_MEDIA_LINK_PRI	(TIPC_MAX_LINK_PRI + 1)
  
  /*
   * Link tolerance limits (min, default, max), in ms
   */
  
  #define TIPC_MIN_LINK_TOL 50
  #define TIPC_DEF_LINK_TOL 1500
  #define TIPC_MAX_LINK_TOL 30000
  
  #if (TIPC_MIN_LINK_TOL < 16)
  #error "TIPC_MIN_LINK_TOL is too small (abort limit may be NaN)"
  #endif
  
  /*
   * Link window limits (min, default, max), in packets
   */
  
  #define TIPC_MIN_LINK_WIN 16
  #define TIPC_DEF_LINK_WIN 50
  #define TIPC_MAX_LINK_WIN 8191
  
  
  struct tipc_node_info {
  	__be32 addr;			/* network address of node */
  	__be32 up;			/* 0=down, 1= up */
  };
  
  struct tipc_link_info {
  	__be32 dest;			/* network address of peer node */
  	__be32 up;			/* 0=down, 1=up */
  	char str[TIPC_MAX_LINK_NAME];	/* link name */
  };
  
  struct tipc_bearer_config {
  	__be32 priority;		/* Range [1,31]. Override per link  */
  	__be32 disc_domain;		/* <Z.C.N> describing desired nodes */
  	char name[TIPC_MAX_BEARER_NAME];
  };
  
  struct tipc_link_config {
  	__be32 value;
  	char name[TIPC_MAX_LINK_NAME];
  };
  
  #define TIPC_NTQ_ALLTYPES 0x80000000
  
  struct tipc_name_table_query {
  	__be32 depth;	/* 1:type, 2:+name info, 3:+port info, 4+:+debug info */
  	__be32 type;	/* {t,l,u} info ignored if high bit of "depth" is set */
  	__be32 lowbound; /* (i.e. displays all entries of name table) */
  	__be32 upbound;
  };
  
  /*
   * The error string TLV is a null-terminated string describing the cause
   * of the request failure.  To simplify error processing (and to save space)
   * the first character of the string can be a special error code character
   * (lying by the range 0x80 to 0xFF) which represents a pre-defined reason.
   */
  
  #define TIPC_CFG_TLV_ERROR      "\x80"  /* request contains incorrect TLV(s) */
  #define TIPC_CFG_NOT_NET_ADMIN  "\x81"	/* must be network administrator */
  #define TIPC_CFG_NOT_ZONE_MSTR	"\x82"	/* must be zone master */
  #define TIPC_CFG_NO_REMOTE	"\x83"	/* remote management not enabled */
  #define TIPC_CFG_NOT_SUPPORTED  "\x84"	/* request is not supported by TIPC */
  #define TIPC_CFG_INVALID_VALUE  "\x85"  /* request has invalid argument value */
  
  /*
   * A TLV consists of a descriptor, followed by the TLV value.
   * TLV descriptor fields are stored in network byte order;
   * TLV values must also be stored in network byte order (where applicable).
   * TLV descriptors must be aligned to addresses which are multiple of 4,
   * so up to 3 bytes of padding may exist at the end of the TLV value area.
   * There must not be any padding between the TLV descriptor and its value.
   */
  
  struct tlv_desc {
  	__be16 tlv_len;		/* TLV length (descriptor + value) */
  	__be16 tlv_type;		/* TLV identifier */
  };
  
  #define TLV_ALIGNTO 4
  
  #define TLV_ALIGN(datalen) (((datalen)+(TLV_ALIGNTO-1)) & ~(TLV_ALIGNTO-1))
  #define TLV_LENGTH(datalen) (sizeof(struct tlv_desc) + (datalen))
  #define TLV_SPACE(datalen) (TLV_ALIGN(TLV_LENGTH(datalen)))
  #define TLV_DATA(tlv) ((void *)((char *)(tlv) + TLV_LENGTH(0)))
  
  static inline int TLV_OK(const void *tlv, __u16 space)
  {
  	/*
  	 * Would also like to check that "tlv" is a multiple of 4,
  	 * but don't know how to do this in a portable way.
  	 * - Tried doing (!(tlv & (TLV_ALIGNTO-1))), but GCC compiler
  	 *   won't allow binary "&" with a pointer.
  	 * - Tried casting "tlv" to integer type, but causes warning about size
  	 *   mismatch when pointer is bigger than chosen type (int, long, ...).
  	 */
  
  	return (space >= TLV_SPACE(0)) &&
  		(ntohs(((struct tlv_desc *)tlv)->tlv_len) <= space);
  }
  
  static inline int TLV_CHECK(const void *tlv, __u16 space, __u16 exp_type)
  {
  	return TLV_OK(tlv, space) &&
  		(ntohs(((struct tlv_desc *)tlv)->tlv_type) == exp_type);
  }
  
  static inline int TLV_GET_LEN(struct tlv_desc *tlv)
  {
  	return ntohs(tlv->tlv_len);
  }
  
  static inline void TLV_SET_LEN(struct tlv_desc *tlv, __u16 len)
  {
  	tlv->tlv_len = htons(len);
  }
  
  static inline int TLV_CHECK_TYPE(struct tlv_desc *tlv,  __u16 type)
  {
  	return (ntohs(tlv->tlv_type) == type);
  }
  
  static inline void TLV_SET_TYPE(struct tlv_desc *tlv, __u16 type)
  {
  	tlv->tlv_type = htons(type);
  }
  
  static inline int TLV_SET(void *tlv, __u16 type, void *data, __u16 len)
  {
  	struct tlv_desc *tlv_ptr;
  	int tlv_len;
  
  	tlv_len = TLV_LENGTH(len);
  	tlv_ptr = (struct tlv_desc *)tlv;
  	tlv_ptr->tlv_type = htons(type);
  	tlv_ptr->tlv_len  = htons(tlv_len);
  	if (len && data)
  		memcpy(TLV_DATA(tlv_ptr), data, tlv_len);
  	return TLV_SPACE(len);
  }
  
  /*
   * A TLV list descriptor simplifies processing of messages
   * containing multiple TLVs.
   */
  
  struct tlv_list_desc {
  	struct tlv_desc *tlv_ptr;	/* ptr to current TLV */
  	__u32 tlv_space;		/* # bytes from curr TLV to list end */
  };
  
  static inline void TLV_LIST_INIT(struct tlv_list_desc *list,
  				 void *data, __u32 space)
  {
  	list->tlv_ptr = (struct tlv_desc *)data;
  	list->tlv_space = space;
  }
  
  static inline int TLV_LIST_EMPTY(struct tlv_list_desc *list)
  {
  	return (list->tlv_space == 0);
  }
  
  static inline int TLV_LIST_CHECK(struct tlv_list_desc *list, __u16 exp_type)
  {
  	return TLV_CHECK(list->tlv_ptr, list->tlv_space, exp_type);
  }
  
  static inline void *TLV_LIST_DATA(struct tlv_list_desc *list)
  {
  	return TLV_DATA(list->tlv_ptr);
  }
  
  static inline void TLV_LIST_STEP(struct tlv_list_desc *list)
  {
  	__u16 tlv_space = TLV_ALIGN(ntohs(list->tlv_ptr->tlv_len));
  
  	list->tlv_ptr = (struct tlv_desc *)((char *)list->tlv_ptr + tlv_space);
  	list->tlv_space -= tlv_space;
  }
  
  /*
   * Configuration messages exchanged via NETLINK_GENERIC use the following
   * family id, name, version and command.
   */
  #define TIPC_GENL_NAME		"TIPC"
  #define TIPC_GENL_VERSION	0x1
  #define TIPC_GENL_CMD		0x1
  
  /*
   * TIPC specific header used in NETLINK_GENERIC requests.
   */
  struct tipc_genlmsghdr {
  	__u32 dest;		/* Destination address */
  	__u16 cmd;		/* Command */
  	__u16 reserved;		/* Unused */
  };
  
  #define TIPC_GENL_HDRLEN	NLMSG_ALIGN(sizeof(struct tipc_genlmsghdr))
  
  /*
   * Configuration messages exchanged via TIPC sockets use the TIPC configuration
   * message header, which is defined below.  This structure is analogous
   * to the Netlink message header, but fields are stored in network byte order
   * and no padding is permitted between the header and the message data
   * that follows.
   */
  
  struct tipc_cfg_msg_hdr {
  	__be32 tcm_len;		/* Message length (including header) */
  	__be16 tcm_type;	/* Command type */
  	__be16 tcm_flags;	/* Additional flags */
  	char  tcm_reserved[8];	/* Unused */
  };
  
  #define TCM_F_REQUEST	0x1	/* Flag: Request message */
  #define TCM_F_MORE	0x2	/* Flag: Message to be continued */
  
  #define TCM_ALIGN(datalen)  (((datalen)+3) & ~3)
  #define TCM_LENGTH(datalen) (sizeof(struct tipc_cfg_msg_hdr) + datalen)
  #define TCM_SPACE(datalen)  (TCM_ALIGN(TCM_LENGTH(datalen)))
  #define TCM_DATA(tcm_hdr)   ((void *)((char *)(tcm_hdr) + TCM_LENGTH(0)))
  
  static inline int TCM_SET(void *msg, __u16 cmd, __u16 flags,
  			  void *data, __u16 data_len)
  {
  	struct tipc_cfg_msg_hdr *tcm_hdr;
  	int msg_len;
  
  	msg_len = TCM_LENGTH(data_len);
  	tcm_hdr = (struct tipc_cfg_msg_hdr *)msg;
  	tcm_hdr->tcm_len   = htonl(msg_len);
  	tcm_hdr->tcm_type  = htons(cmd);
  	tcm_hdr->tcm_flags = htons(flags);
  	if (data_len && data)
  		memcpy(TCM_DATA(msg), data, data_len);
  	return TCM_SPACE(data_len);
  }
  
  #endif