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diff --git a/contrib/ngatm/man/libngatm.3 b/contrib/ngatm/man/libngatm.3
new file mode 100644
index 000000000000..8c5941489b74
--- /dev/null
+++ b/contrib/ngatm/man/libngatm.3
@@ -0,0 +1,72 @@
+.\"
+.\" Copyright (c) 2001-2003
+.\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
+.\" 	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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" Author: Hartmut Brandt <harti@freebsd.org>
+.\"
+.\" $Begemot: libunimsg/man/libunimsg.3,v 1.2 2003/08/21 16:01:07 hbb Exp $
+.\"
+.Dd October 30, 2003
+.Dt libngatm 3
+.Os
+.Sh NAME
+.Nm libngatm
+.Nd "ATM signalling library"
+.Sh LIBRARY
+Begemot ATM signalling library
+.Pq libngatm, -lngatm
+.Sh DESCRIPTION
+The Begemot UNI signalling library handles message decoding and encoding as
+well as the Q.2110 and Q.2120 transport protocols and adaptation layers, and
+ATM-Forum UNI 4.0 compliant signalling.
+Because of this complexity the description is broken down in several man pages:
+.Bl -tag -width XXXX
+.It Xr unimsg 3
+Describes a data structure and functions for handling of variable sized
+messages.
+.It Xr unistruct 3
+describes data structures for the decoding, encoding and printing functions
+in the library.
+.It Xr unifunc 3
+describes the decoding, encoding and printing functions.
+.\" .It Xr sscop 3
+.\" describes the SSCOP transport protocol functions.
+.\" .It Xr sscfu 3
+.\" describes the SSCF at the UNI functions.
+.\" .It Xr uni 3
+.\" describes the UNI 4.0 signalling functions.
+.It Xr uniaddr 3
+describes address structures and handling functions.
+.\" .It Xr unisap 3
+.\" describes ATM-Forum ATM-API service access point structures and
+.\" handling functions.
+.El
+.Sh SEE ALSO
+.Xr sscop 1
+.Sh STANDARDS
+This implementation conforms to the applicable ITU-T
+recommendations and ATM Forum standards.
+.Sh AUTHORS
+.An Hartmut Brandt Aq harti@freebsd.org
diff --git a/contrib/ngatm/man/uniaddr.3 b/contrib/ngatm/man/uniaddr.3
new file mode 100644
index 000000000000..f80d45c723c6
--- /dev/null
+++ b/contrib/ngatm/man/uniaddr.3
@@ -0,0 +1,125 @@
+.\"
+.\" Copyright (c) 2001-2003
+.\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
+.\" 	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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" Author: Hartmut Brandt <harti@freebsd.org>
+.\"
+.\" $Begemot: libunimsg/man/uniaddr.3,v 1.2 2003/08/21 16:01:07 hbb Exp $
+.\"
+.Dd October 30, 2003
+.Dt uniaddr 3
+.Os
+.Sh NAME
+.Nm unimsg ,
+.Nm uni_str2nsap ,
+.Nm uni_nsap2str ,
+.Nm uni_prefix2str ,
+.Nm uni_e1642nsap ,
+.Nm uni_nsap2e164
+.Nd "ATM signalling library - address handling"
+.Sh LIBRARY
+Begemot ATM signalling library
+.Pq libunimsg, -lunimsg
+.Sh SYNOPSIS
+.In netnatm/addr.h
+.Ft int
+.Fn uni_str2nsap "u_char *nsap" "const char *str"
+.Ft void
+.Fn uni_nsap2str "char *str" "const u_char *nsap" "int dots"
+.Ft void
+.Fn uni_prefix2str "char *str" "const u_char *prefix" "u_int len" "int dots"
+.Ft int
+.Fn uni_e1642nsap "u_char *nsap" "const char *e164"
+.Ft int
+.Fn uni_nsap2e164 "char *e164" "const u_char *nsap" "int check"
+.Sh DESCRIPTION
+The UNI message library contains a number of utility functions to handle
+NSAP and E.164 addresses.
+.Pp
+The function
+.Fn uni_str2nsap
+parses a string and interprets it as an NSAP address.
+The string should consist of exact 40 hexadecimal digits
+(upper and lower case are allowed) and any
+number of dots at any position.
+Any other character is illegal.
+The resulting NSAP address is written to the buffer pointed to by
+.Fa nsap .
+This buffer should be at least 20 bytes.
+On success the funtion returns 0.
+If an parsing error happens -1 is returned.
+.Pp
+The function
+.Fn uni_nsap2str
+converts the NSAP address pointed to by
+.Fa nsap
+into a string.
+For some commonly used NSAP formats (those with leading
+octets 0x39, 0x45 or 0x47) dots may be inserted to make the address more
+readable by passing a non-0 value in
+.Fa dots .
+The buffer pointed to by
+.Fa str
+should be large enough to hold the resulting string plus the terminating NUL.
+A size of 80 byte is large enough for all cases.
+.Pp
+The function
+.Fn uni_prefix2str
+converts an NSAP prefix to a string.
+The length of the NSAP prefix in bytes is passed in
+.Fa len .
+.Li "uni_nsap2str(str, nsap, dots)"
+is equivalent to
+.Li "uni_prefix2str(str, nsap, 20, dots)" .
+.Pp
+The function
+.Fn uni_e1642nsap
+converts an E.164 address given as an ASCII string to an embedded E.164 NSAP
+address.
+The string pointed to by
+.Fa e164
+must consist of at least 1 and not more than 15 ASCII digits.
+The function returns 0 on success and -1 if the E.164 address was malformed.
+.Pp
+The function
+.Fn uni_nsap2e164
+extracts the E.164 address from an embedded E.164 NSAP address.
+The argument
+.Fa check
+specifies whether the NSAP address should be checked for correct syntax.
+If
+.Fa check
+is 0 the last 11 bytes of the address are ignored. If
+.Fa check
+is 1 the last 11 bytes except the selector byte must be zero.
+If
+.Fa check
+is 2 the last 11 bytes must be zero.
+The function returns 0 on success and -1 when the NSAP address was not an
+embedded E.164 NSAP or one of the additional checks failed.
+.Sh SEE ALSO
+.Xr libngatm 3 ,
+.Sh AUTHORS
+.An Hartmut Brandt Aq harti@freebsd.org
diff --git a/contrib/ngatm/man/unifunc.3 b/contrib/ngatm/man/unifunc.3
new file mode 100644
index 000000000000..65f9ef939111
--- /dev/null
+++ b/contrib/ngatm/man/unifunc.3
@@ -0,0 +1,252 @@
+.\"
+.\" Copyright (c) 2001-2003
+.\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
+.\" 	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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" Author: Hartmut Brandt <harti@freebsd.org>
+.\"
+.\" $Begemot: libunimsg/man/unifunc.3,v 1.2 2003/08/21 16:01:08 hbb Exp $
+.\"
+.Dd October 30, 2003
+.Dt unifunc 3
+.Os
+.Sh NAME
+.Nm libngatm
+.Nm uni_decode
+.Nm uni_decode_head
+.Nm uni_decode_body
+.Nm uni_decode_ie_hdr
+.Nm uni_decode_ie_body
+.Nm uni_encode
+.Nm uni_encode_msg_hdr
+.Nm uni_encode_ie
+.Nm uni_encode_ie_hdr
+.Nm uni_check_ie
+.Nm uni_print_cref
+.Nm uni_print_msghdr
+.Nm uni_print
+.Nm uni_print_ie
+.Nm uni_initcx
+.Nm uni_print_cx
+.Nd "ATM signalling library - message handling functions"
+.Sh LIBRARY
+Begemot ATM signalling library
+.Pq libngatm, -lngatm
+.Sh SYNOPSIS
+.In netnatm/msg/unistruct.h
+.In netnatm/msg/unimsglib.h
+.Ft int
+.Fn uni_decode "struct uni_msg *buf" "struct uni_all *msg" "struct unicx *cx"
+.Ft int
+.Fn uni_decode_head "struct uni_msg *buf" "struct uni_all *msg" "struct unicx *cx"
+.Ft int
+.Fn uni_decode_body "struct uni_msg *buf" "struct uni_all *msg" "struct unicx *cx"
+.Ft int
+.Fn uni_decode_ie_hdr "enum uni_ietype *type" "struct uni_iehdr *hdr" "struct uni_msg *buf" "struct unicx *cx" "u_int *ielen"
+.Ft int
+.Fn uni_decode_ie_body "enum uni_ietype type" "union uni_ieall *ie" "struct uni_msg *buf" "u_int ielen" "struct unicx *cx"
+.Ft int
+.Fn uni_encode "struct uni_msg *buf" "struct uni_all *msg" "struct unicx *cx"
+.Ft int
+.Fn uni_encode_msg_hdr "struct uni_msg *buf" "struct uni_msghdr *hdr" "enum uni_msgtype type" "struct unicx *cx" "int *mlen"
+.Ft int
+.Fn uni_encode_ie "enum uni_ietype type" "struct uni_msg *buf" "union uni_ieall *ie" "struct unicx *cx"
+.Ft int
+.Fn uni_encode_ie_hdr "struct uni_msg *buf" "enum uni_ietype type" "struct uni_iehdr *hdr" "u_int len" "struct unicx *cx"
+.Ft int
+.Fn uni_check_ie "enum uni_ietype type" "union uni_ieall *ie" "struct unicx *cx"
+.Ft void
+.Fn uni_print_cref "char *buf" "size_t buflen" "struct uni_cref *cref" "struct unicx *cx"
+.Ft void
+.Fn uni_print_msghdr "char *buf" "size_t buflen" "struct uni_msghdr *hdr" "struct unicx *cx"
+.Ft void
+.Fn uni_print "char *buf" "size_t buflen" "struct uni_all *msg" "struct unicx *cx"
+.Ft void
+.Fn uni_print_ie "char *buf" "size_t buflen" "enum uni_ietype type" "union uni_ieall *ie" "struct unicx *cx"
+.Ft void
+.Fn uni_initcx "struct unicx *cx"
+.Ft void
+.Fn uni_print_cx "char *buf" "size_t buflen" "struct unicx *cx"
+.Sh DESCRIPTION
+The
+.Nm
+library handles UNI 4.0 messages.
+For each information element and message
+type the header files contain a structure definition.
+Additionally there 
+are a number of help structures and a global context structure for some
+of the library functions.
+This document describes the functions that are
+used to handle messages.
+.Ss DECODING
+Decoding is the process of taking an octet stream containing a UNI message
+or IE, parsing it and filling in a message or IE structure.
+.Pp
+The function
+.Fn uni_decode
+takes a message buffer, interprets it as a UNI message and fills in the
+structure pointed to by
+.Fa msg .
+It also takes a context argument and may fill the error array in the context.
+It returns -1 if there is an error decoding the message header and
+-2 if there is an error decoding the message body.
+The function returns 0 on success.
+.Pp
+The process of decoding a message can be split up by calling
+.Fn uni_decode_head
+and
+.Fn uni_decode_body .
+The first of these functions decodes only the message header and the second
+one decodes only the information elements.
+.Fn uni_decode_head
+returns 0 if it could decode the message header
+and -1 if the message could not be decoded (bad protocol
+identifier, bad length or broken call reference).
+.Fn uni_decode_body
+return 0 on success and -1 for unknown message types or if any
+IE had an error.
+.Pp
+The function
+.Fn uni_decode_ie_hdr
+decodes the next information element header.
+It returns the IE type and its length
+in the variables pointed to by
+.Va type
+and
+.Va ielen
+and stores the decoded header in the structure pointed to by
+.Va hdr .
+The function returns 0 on success and -1 if there were not enough bytes
+in the buffer left for a complete IE header.
+.Pp
+The function
+.Fn uni_decode_ie_body
+decodes the body of an information element. It is passed the buffer with the
+message
+.Fa buf ,
+the information element type
+.Fa type
+and length
+.Fa ielen .
+The IE is stored in the union pointed to by
+.Fa ie .
+The function returns -1 on errors and 0 on success.
+In any case the most correct
+number of bytes is consumed from the input buffer.
+.Ss ENCODING
+Encoding is the process of taking a message or IE structure and producing
+an octet stream from it.
+.Pp
+The function
+.Fn uni_encode
+encodes a UNI message.
+It returns -1 if the message type is out of bounds, -3
+if the message type is unknown.
+The encoding functions for the message types
+can return their own error codes.
+The function returns 0 on success.
+.Pp
+The function
+.Fn uni_encode_msg_hdr
+encodes a message header.
+The variable pointed to by
+.Fa mlen
+is set to the offset of the message length field from the begin of the
+byte stream.
+This is needed because the length of the message body will
+be known only after all the IEs have been encoded.
+Then the length
+has to be inserted into this place.
+The function returns -1 if the call reference
+was bad and 0 on success.
+.Pp
+The function
+.Fn uni_encode_ie
+encodes one information element.
+The function returns 0 on success or -1
+on errors.
+The function
+.Fn uni_encode_ie_hdr
+encodes the four byte IE header.
+The argument
+.Fa len
+is the maximum expected length of the information element, not the real length.
+The function inserts a 0 in the real length field.
+This must be
+fixed up by the caller after encoding the IE contents.
+The function
+return -1 if an empty IE is to be encoded (in this case the length field will
+have been set to 4) or 0 otherwise.
+.Ss CHECKING
+There exists a number of function that do consistency checks on information
+elements.
+Note, that these functions do not check inter-IE consistency, but
+each IE by itself.
+.Pp
+The function
+.Fn uni_check_ie
+check an information element for consistency.
+It returns 0 if the IE seems
+ok, -1 otherwise.
+.Ss PRINTING
+A number of functions can be used to print decoded messages and IEs in
+a human readable form.
+This is intended mainly for debugging.
+Some fields of the library context are used to control how the printing is done
+(see
+.Xr unistruct 3 ).
+Each of the function takes a
+.Fa buf
+and a
+.Fa buflen
+argument.
+The string that is generated in the buffer pointed to by
+.Fa buf
+is guaranteed to be NUL terminated.
+.Pp
+The function
+.Fn uni_print_cref
+formats a call reference taking into account special call references.
+The function
+.Fn uni_print_msg_hdr
+formats a message header.
+The functions
+.Fn uni_print
+and
+.Fn uni_print_ie
+print messages and information elements.
+.Ss CONTEXTS
+There are two functions for context handling.
+.Fn uni_initcx
+initializes a context with default values and
+.Fn uni_print_cx
+prints a context to the given buffer.
+.Sh SEE ALSO
+.Xr libngatm 3
+.Sh STANDARDS
+This implementation conforms to the applicable ITU-T
+recommendations and ATM Forum standards with the exception of some limitations
+(see the Configuration section).
+.Sh AUTHORS
+.An Hartmut Brandt Aq harti@freebsd.org
diff --git a/contrib/ngatm/man/unistruct.3 b/contrib/ngatm/man/unistruct.3
new file mode 100644
index 000000000000..86975b66a249
--- /dev/null
+++ b/contrib/ngatm/man/unistruct.3
@@ -0,0 +1,320 @@
+.\"
+.\" Copyright (c) 2001-2003
+.\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
+.\" 	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.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.\"
+.\" Author: Hartmut Brandt <harti@freebsd.org>
+.\"
+.\" $Begemot: libunimsg/man/unistruct.3,v 1.2 2003/08/21 16:01:08 hbb Exp $
+.\"
+.Dd October 30, 2003
+.Dt unistruct 3
+.Os
+.Sh NAME
+.Nm libngatm
+.Nd "ATM signalling library"
+.Sh LIBRARY
+Begemot ATM signalling library
+.Pq libngatm, -lngatm
+.Sh SYNOPSIS
+.In netnatm/msg/unistruct.h
+.In netnatm/msg/unimsglib.h
+.Sh DESCRIPTION
+The
+.Nm
+library handles UNI 4.0 messages.
+For each information element and message
+type the header files contain a structure definition.
+Additionally there 
+are a number of help structures and a global context structure for some
+of the library functions.
+This document only describes the common structures.
+For information element and message structures see the header files.
+.Ss LIBRARY CONFIGURATION
+When the library is compiled a number of constants are define in the file
+.Pa uni_config.h .
+They define certain limits.
+Because of the use of these definitions a change
+in any of them requires a complete recompilation of all library code and
+all code that uses the library.
+The following constants are defined (they
+value behind the name is the default value):
+.Bl -tag -width XXXX
+.It Dv UNI_MAX_ERRIE ( Li 50 )
+When decoding information elements and analyzing them the library fills
+an array in the context with the identifiers of IEs that had errors.
+This is the size of this array.
+.It Dv UNI_NUM_IE_GIT ( Li 3 )
+A message is allowed to contain more than one General Identifier Transport
+information element.
+This is the maximum supported number of these IEs.
+.It Dv UNI_NUM_IE_BLLI ( Li 3 )
+The maximum number of BLLI information elements in a SETUP message.
+.It Dv UNI_NUM_IE_CALLEDSUB ( Li 2 )
+The maximum number of Called Subaddress information elements in a SETUP message.
+.It Dv UNI_NUM_IE_CALLINGSUB ( Li 2 )
+The maximum number of Calling Subaddress information elements in a SETUP
+message.
+.It Dv UNI_NUM_IE_TNS ( Li 4 )
+The maximum number of Transit Network Selection information elements in a SETUP
+message.
+.It Dv UNI_TNS_MAXLEN ( Li 4 )
+The maximum size of a name in the TNS IE.
+.It Dv UNI_UU_MAXLEN ( Li 128 )
+Maximum size of user data in the UU IE.
+.It Dv UNI_ADDR_MAXLEN ( Li 20 )
+Maximum address size.
+.It Dv UNI_SUBADDR_MAXLEN ( Li 20 )
+Maximum subaddress size.
+.It Dv UNI_NUM_IE_DTL ( Li 10 )
+Maximum number of DTL information elements in a SETUP message.
+.It Dv UNI_DTL_MAXNUM ( Li 20 )
+Maximum number of identifiers in one DTL information element.
+.El
+.Ss INFORMATION ELEMENTS
+Each information element structure starts with a field of type:
+.Bd -literal -offset indent
+struct uni_iehdr {
+	enum uni_coding	coding;	/* coding standard */
+	enum uni_ieact	act;	/* action indicator */
+	u_int		pass:1;	/* PNNI pass along request */
+	u_int		present;/* which optional elements are present */
+};
+.Ed
+.Pp
+The
+.Fa coding
+field is the coding standard of the information element and may be one of
+.Dv UNI_CODING_ITU
+or
+.Dv UNI_CODING_NET .
+The action indicator
+.Fa act
+is used for error processing and is one of:
+.Bl -tag -width XXXX
+.It Dv UNI_IEACT_CLEAR
+clear call
+.It Dv UNI_IEACT_IGNORE
+ignore IE and proceed 
+.It Dv UNI_IEACT_REPORT
+ignore IE, report and proceed
+.It Dv UNI_IEACT_MSG_IGNORE
+ignore message
+.It Dv UNI_IEACT_MSG_REPORT
+ignore message and report
+.It Dv UNI_IEACT_DEFAULT
+the use action indicator flag was not set.
+.El
+.Pp
+For information elements in PNNI message the
+.Fa pass
+fields contains the pass along flag from the IE header.
+.Pp
+The
+.Fa present
+field is a bit field, which contains four common bits describing the current
+state of the information element.
+The rest of the bits are used by the
+information elements to indicate which of the optional fields of the IE are
+present.
+Most of the IE header files contain definitions for those bits.
+The common bits are:
+.Bd -literal -offset indent
+#define UNI_IE_EMPTY	0x80000000
+#define UNI_IE_PRESENT	0x40000000
+#define UNI_IE_ERROR	0x20000000
+#define UNI_IE_XXX	0x10000000
+.Ed
+.Pp
+The flag
+.Dv UNI_IE_EMPTY
+indicates that the information element is present, but empty (its length is
+zero).
+This is legal for all information elements.
+The flag
+.Dv UNI_IE_PRESENT
+indicates that the IE is present in the message and the flag
+.Dv UNI_IE_ERROR
+indicates that the IE had an error.
+The flag
+.Dv UNI_IE_XXX
+is currently not used.
+.Pp
+The following macros may be used to test or change these flags:
+.Bl -tag -width XXXX
+.It Dv IE_ISPRESENT
+Check whether the IE is present and not empty.
+Returns true in this case.
+.It Dv IE_SETPRESENT
+Set the IE to be present and not empty.
+.It Dv IE_ISEMPTY
+Check whether the IE is present and empty.
+Returns true in this case.
+.It Dv IE_SETEMPTY
+Set the IE to be present and empty.
+.It Dv IE_ISERROR
+Check whether the IE is present and has an error.
+Returns true in this case.
+.It Dv IE_SETERROR
+Sets the IE to be present and to have an error.
+.It Dv IE_ISGOOD
+Checks whether the IE is present, not empty and without error.
+Returns true in this case.
+.El
+.Pp
+For each IE type there is an
+.Vt enum uni_ietype
+definition of the form
+.Dv UNI_IE_*
+in
+.Pa uni_hdr.h .
+.Pp
+.Pa unistruct.h
+contains a
+.Vt union uni_ieall
+that is the union of all IE structures and a
+.Bd -literal -offset indent
+struct uni_ie {
+	enum uni_ietype		ietype;
+	union uni_ieall		u;
+};
+.Ed
+.Ss MESSAGES
+Each message structure starts with a
+.Bd -literal -offset indent
+struct uni_msghdr {
+	struct uni_cref	cref;
+	enum uni_msgact	act;	/* action indicator */
+	u_int		pass:1;	/* PNNI pass along request */
+};
+.Ed
+.Pp
+The
+.Fa cref
+is the call reference:
+.Bd -literal -offset indent
+struct uni_cref {
+	u_int	flag;
+	u_int	cref;
+};
+.Ed
+.Pp
+There are two special call references:
+.Dv CREF_GLOBAL
+and
+.Dv CREF_DUMMY .
+The
+.Fa act
+field is the message action indicator and has one of the following values:
+.Bl -tag -width XXXX
+.It Dv UNI_MSGACT_CLEAR
+clear call
+.It Dv UNI_MSGACT_IGNORE
+ignore message
+.It Dv UNI_MSGACT_REPORT
+send STATUS message
+.It Dv UNI_MSGACT_DEFAULT
+default handling for this message type
+.El
+.Pp
+The
+.Fa pass
+field is the pass along indicator in the case of PNNI messages.
+.Pp
+For each message type there is a
+.Vt enum uni_msgtype
+definition of the form
+.Dv UNI_*
+in
+.Pa uni_hdr.h .
+.Pa uni_struct.h
+contains a
+.Vt union_msgall
+that is the union of all message structures and a
+.Bd -literal -offset indent
+struct uni_all {
+	enum uni_msgtype	mtype;
+	union uni_msgall	u;
+};
+.Ed
+.Ss CONTEXTS
+The header file
+.Pa unimsglib.h
+contains a definition of a
+.Vt struct uni_context
+that is used to minimize the number of arguments passed to certain functions
+and to avoid the use of global variables.
+This structure has the following
+public fields (all other fields are used internally by the library):
+.Bl -tag -width XXXX
+.It Fa err
+This is an array consisting of the following structures:
+.Bd -literal -offset indent
+struct uni_ierr {
+	enum uni_ierr_type err;	/* what error */
+	enum uni_ieact	act;	/* the action indicator */
+	u_int		ie:8;	/* the ie type */
+	u_int		man:1;	/* mandatory flag */
+	u_int		epref:1;/* Q.2971 9.5.3.2.1 low-pri epref */
+};
+.Ed
+When decoding information elements the information about IEs with errors is
+stuffed into this array.
+.It Fa errcnt
+The current number of IEs in
+.Fa err .
+.It Fa q2932
+Enable the Q.2932.1 Generic Functional Protocol.
+Currently only message
+and IE decoding/encoding is supported.
+The signalling part is still missing.
+.It Fa pnni
+Enable PNNI extensions.
+Currently only message and IE decoding/encoding
+is supported.
+The signalling part is still missing.
+.It Fa git_hard
+Do hard checking on GIT information elements.
+.It Fa bearer_hard
+Do hard checking on Broadband Bearer IEs.
+This involves rejecting old bearer
+type values.
+.It Fa cause_hard
+Do hard checking on Cause information elements.
+.It Fa multiline
+This is used by the printing routines.
+Legal values are 0 to 4 and give
+different kinds of printout.
+.It Fa tabsiz
+The size of tabulation to use in printing.
+4 is a good value.
+.El
+.Sh SEE ALSO
+.Xr libunimsg 3 ,
+.Sh STANDARDS
+This implementation conforms to the applicable ITU-T
+recommendations and ATM Forum standards with the exception of some limitations
+(see the Configuration section).
+.Sh AUTHORS
+.An Hartmut Brandt Aq harti@freebsd.org