The following general definitions apply to the integrated services data structures and macros:

• The following macro is defined with the value given below:

  Macro	Value	Usage
  wordsof(x)	(((x)+3)/4)	number of 32-bit words

• The following macros are defined with the following integer values for service numbers:
  Note: The values are protocol values defined in RFC 2211, RFC 2212, and RFC 2215. See Related protocol specifications for information about accessing RFCs.

  Macro	Value
  GENERAL_INFO	1
  GUARANTEED_SERV	2
  CONTROLLED_LOAD_SERV	5

• Enumeration int_serv_wkp is defined for well-known parameter identities and has at least the following members with the following integer values:
  Note: The values are protocol values defined in RFC 2215. See Related protocol specifications for information about accessing RFCs.

  Member	Value	Meaning
  IS_WKP_HOP_CNT	4	Number of network nodes supporting Integrated Services along the flow path
  IS_WKP_PATH_BW	6	Available bandwidth in bytes per second throughout the flow path
  IS_WKP_MIN_LATENCY	8	Minimum end-to-end latency in microseconds
  IS_WKP_COMPOSED_MTU	10	Maximum transmission unit without causing IP fragmentation along the flow path
  IS_WKP_TB_TSPEC	127	Token-bucket TSPEC parameter

• The following macros are defined with the values given below:

  Macro	Value
  INTSERV_VERS_MASK	0xf0
  INTSERV_VERSION0	0
  Intserv_Version(x)	(((x)&ismh_version &INTSERV_VERS_MASK)>>4)
  Intserv_Version_OK(x)	(((x)->ismh_version &INTSERV_VERS_MASK)== \INTSERV_VERSION0)

• Type IS_main_hdr_t is defined by typedef as a structure to represent an Integrated Services main header, and has at least the following members:

  Member	Type	Usage
  ismh_len32b	u_int16_t	Number of 32-bit words excluding this header
  ismh_unused	u_int8_t
  ismh_version	u_int8_t	Version

• Type IS_serv_hdr_t is defined by typedef as a structure to represent an Integrated Services service element header, and has at least the following members:

  Member	Type	Usage
  issh_flags	u_int8_t	Flag byte
  issh_len32b	u_int16_t	Number of 32-bit words excluding this header
  issh_service	u_int8_t	Service number

• The following macro is defined with the value given below to indicate the break bit in the IS_serv_hdr_t flag byte:

  Macro	Value
  ISSH_BREAK_BIT	0x80

• Type IS_parm_hdr_t is defined by typedef as a structure to represent an Integrated Services parameter element header, and has at least the following members:

  Member	Type	Usage
  isph_flags	u_int8_t	Flags
  isph_len32b	u_int16_t	Number of 32-bit words excluding this header
  isph_parm_num	u_int8_t	Parameter number

• The following macro is defined with the value given below to indicate the not valid bit in the IS_parm_hdr_t flag byte:

  Macro	Value
  ISPH_FLG_INV	0x80

• The following macros are defined with the values given below:

  Macro	Value
  Next_Main_Hdr(p)	(IS_main_hdr_t *)((u_int32_t *)(p)+1+(p)->ismh_len32b)
  Next_Parm_Hdr(p)	(IS_parm_hdr_t *)((u_int32_t *)(p)+1+(p)->isph_len32b)
  Next_Serv_Hdr(p)	(IS_serv_hdr_t *)((u_int32_t *)(p)+1+(p)->issh_len32b)
  Non_Is_Hop	((IS_serv_hdr_t *)p)->issh_flags & ISSH_BREAK_BIT
  Set_Break_Bit(p)	((IS_serv_hdr_t *)p)->issh_flags|=ISSH_BREAK_BIT
  Set_Main_Hdr(p, len)	{(p)->ismh_version = INTSERV_VERSION0; \ (p)->ismh_unused = 0; \ (p)->ismh_len32b = wordsof(len); }
  Set_Parm_Hdr(p, id, len)	{(p)->isph_parm_num = (id); \ (p)->isph_flags = 0; \ (p)->isph_len32b = wordsof(len); }
  Set_Serv_Hdr(p, s, len)	{(p)->issh_service = (s); \ (p)->issh_flags = 0; \ (p)->issh_len32b = wordsof(len); }