Staging work. converted nng_ipc.

14 files changed, 1322 insertions, 0 deletions

diff --git a/docs/reference/src/old/nng_dialer_getopt.3.adoc b/docs/reference/src/old/nng_dialer_getopt.3.adoc
new file mode 100644
index 00000000..a4083819
--- /dev/null
+++ b/docs/reference/src/old/nng_dialer_getopt.3.adoc
@@ -0,0 +1,149 @@
+= nng_dialer_getopt(3)
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_dialer_getopt - get dialer option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_dialer_getopt(nng_dialer d, const char *opt, void *val, size_t *valszp);
+
+int nng_dialer_getopt_bool(nng_dialer d, const char *opt, bool *bvalp);
+
+int nng_dialer_getopt_int(nng_dialer d, const char *opt, int *ivalp);
+
+int nng_dialer_getopt_ms(nng_dialer d, const char *opt, nng_duration *durp);
+
+int nng_dialer_getopt_ptr(nng_dialer d, const char *opt, void **ptr);
+
+int nng_dialer_getopt_size(nng_dialer d, const char *opt, size_t *zp);
+
+int nng_dialer_getopt_sockaddr(nng_dialer d, const char *opt, nng_sockaddr *sap);
+
+int nng_dialer_getopt_string(nng_dialer d, const char *opt, char **strp);
+
+int nng_dialer_getopt_uint64(nng_dialer d, const char *opt, uint64_t *u64p);
+
+----
+
+== DESCRIPTION
+
+IMPORTANT: These functions are deprecated.  Please see xref:nng_dialer_get.3.adoc[nng_dialer_get].
+They may not be present if the library was built with `NNG_ELIDE_DEPRECATED`.
+
+(((options, dialer)))
+The `nng_dialer_getopt()` functions are used to retrieve option values for
+the xref:nng_dialer.5.adoc[dialer] _d_.
+The actual options that may be retrieved in this way
+vary, and many are documented in xref:nng_options.5.adoc[nng_options(5)].
+
+Additionally some transport-specific options are documented with the transports themselves.
+
+=== Forms
+
+In all of these forms, the option _opt_ is retrieved from the dialer _d_.
+The forms vary based on the type of the option they take.
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+`nng_dialer_getopt()`::
+This function is untyped and can be used to retrieve the value of any option.
+The caller must store a pointer to a buffer to receive the value in _val_,
+and the size of the buffer shall be stored at the location referenced
+by _valszp_. +
+ +
+When the function returns, the actual size of the data copied (or that
+would have been copied if sufficient space were present) is stored at
+the location referenced by _valszp_.
+If the caller's buffer is not large
+enough to hold the entire object, then the copy is truncated.
+Therefore the caller should validate that the returned size in _valszp_ does not
+exceed the original buffer size to check for truncation. +
+ +
+It is acceptable to pass `NULL` for _val_ if the value in _valszp_ is zero.
+This can be used to determine the size of the buffer needed to receive
+the object.
+
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_dialer_getopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The value will be stored at _bvalp_.
+
+`nng_dialer_getopt_int()`::
+This function is for options which take an integer (`int`).
+The value will be stored at _ivalp_.
+
+`nng_dialer_getopt_ms()`::
+This function is used to retrieve time xref:nng_duration.5.adoc[durations]
+(such as timeouts), stored in _durp_ as a number of milliseconds.
+(The special value ((`NNG_DURATION_INFINITE`)) means an infinite amount of time, and
+the special value ((`NNG_DURATION_DEFAULT`)) means a context-specific default.)
+
+`nng_dialer_getopt_ptr()`::
+This function is used to retrieve a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed using other functions.
+Note that this form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_dialer_getopt_size()`::
+This function is used to retrieve a size into the pointer _zp_,
+typically for buffer sizes, message maximum sizes, and similar options.
+
+`nng_dialer_getopt_sockaddr()`::
+This function is used to retrieve an xref:nng_sockaddr.5.adoc[`nng_sockaddr`]
+into the value referenced by _sap_.
+
+`nng_dialer_getopt_string()`::
+This function is used to retrieve a string into _strp_.
+This string is created from the source using xref:nng_strdup.3.adoc[`nng_strdup()`]
+and consequently must be freed by the caller using
+xref:nng_strfree.3.adoc[`nng_strfree()`] when it is no longer needed.
+
+`nng_dialer_getopt_uint64()`::
+This function is used to retrieve a 64-bit unsigned value into the value
+referenced by _u64p_.
+This is typically used for options related to identifiers, network
+numbers, and similar.
+
+== RETURN VALUES
+
+These functions returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_EBADTYPE`:: Incorrect type for option.
+`NNG_ECLOSED`:: Parameter _d_ does not refer to an open dialer.
+`NNG_EINVAL`:: Size of destination _val_ too small for object.
+`NNG_ENOMEM`:: Insufficient memory exists.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_EWRITEONLY`:: The option _opt_ is write-only.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_dialer_create.3.adoc[nng_dialer_create(3)]
+xref:nng_dialer_setopt.3.adoc[nng_dialer_setopt(3)]
+xref:nng_strdup.3.adoc[nng_strdup(3)],
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_strfree.3.adoc[nng_strfree(3)],
+xref:nng_dialer.5.adoc[nng_dialer(5)],
+xref:nng_duration.5.adoc[nng_duration(5)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng_sockaddr.5.adoc[nng_sockaddr(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_dialer_setopt.3.adoc b/docs/reference/src/old/nng_dialer_setopt.3.adoc
new file mode 100644
index 00000000..3aaff1eb
--- /dev/null
+++ b/docs/reference/src/old/nng_dialer_setopt.3.adoc
@@ -0,0 +1,134 @@
+= nng_dialer_setopt(3)
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_dialer_setopt - set dialer option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_dialer_setopt(nng_dialer d, const char *opt, const void *val,
+    size_t valsz);
+
+int nng_dialer_setopt_bool(nng_dialer d, const char *opt, bool bval);
+
+int nng_dialer_setopt_int(nng_dialer d, const char *opt, int ival);
+
+int nng_dialer_setopt_ms(nng_dialer d, const char *opt, nng_duration dur);
+
+int nng_dialer_setopt_ptr(nng_dialer d, const char *opt, void *ptr);
+
+int nng_dialer_setopt_size(nng_dialer d, const char *opt, size_t z);
+
+int nng_dialer_setopt_string(nng_dialer d, const char *opt, const char *str);
+
+int nng_dialer_setopt_uint64(nng_dialer d, const char *opt, uint64_t u64);
+
+----
+
+== DESCRIPTION
+
+IMPORTANT: These functions are deprecated.  Please see xref:nng_dialer_set.3.adoc[nng_dialer_set].
+They may not be present if the library was built with `NNG_ELIDE_DEPRECATED`.
+
+(((options, dialer)))
+The `nng_dialer_setopt()` functions are used to configure options for
+the xref:nng_dialer.5.adoc[dialer] _d_.
+The actual options that may be configured in this way
+vary, and many are documented in xref:nng_options.5.adoc[nng_options(5)].
+
+Additionally some transport-specific options are documented with the
+transports themselves.
+
+NOTE: Once a dialer has started, it is generally not possible to change
+its configuration.
+
+=== Forms
+
+In all of these forms, the option _opt_ is configured on the dialer _d_.
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+`nng_dialer_setopt()`::
+This function is untyped, and can be used to configure any arbitrary data.
+The _val_ pointer addresses the data to copy, and _valsz_ is the
+size of the objected located at _val_.
+
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_dialer_setopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The _bval_ is passed to the option.
+
+`nng_dialer_setopt_int()`::
+This function is for options which take an integer (`int`).
+The _ival_ is passed to the option.
+
+`nng_dialer_setopt_ms()`::
+This function is used to configure time durations (such as timeouts) using
+type xref:nng_duration.5.adoc[`nng_duration`].
+The duration _dur_ is an integer number of milliseconds.
+
+`nng_dialer_setopt_ptr()`::
+This function is used to pass a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed by other functions.
+For example, TLS configuration objects created with
+(xref:nng_tls_config_alloc.3tls.adoc[`nng_tls_config_alloc()`])
+can be passed this way.
+
+NOTE: This form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_dialer_setopt_size()`::
+This function is used to configure a size, _z_, typically for buffer sizes,
+message maximum sizes, and similar options.
+
+`nng_dialer_setopt_string()`::
+This function is used to pass configure a string, _str_.
+Strings passed this way must be legal UTF-8 or ASCII strings, terminated
+with a `NUL` (`\0`) byte.
+(Other constraints may apply as well, see the documentation for each option
+for details.)
+
+`nng_dialer_setopt_uint64()`::
+This function is used to configure a 64-bit unsigned value, _u64_.
+This is typically used for options related to identifiers, network numbers,
+and such.
+
+== RETURN VALUES
+
+These functions return 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_EBADTYPE`:: Incorrect type for option.
+`NNG_ECLOSED`:: Parameter _d_ does not refer to an open dialer.
+`NNG_EINVAL`:: The value being passed is invalid.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_EREADONLY`:: The option _opt_ is read-only.
+`NNG_ESTATE`:: The dialer _d_ is already started.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_dialer_create.3.adoc[nng_dialer_create(3)]
+xref:nng_dialer_getopt.3.adoc[nng_dialer_getopt(3)]
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_dialer.5.adoc[nng_dialer(5)],
+xref:nng_duration.5.adoc[nng_duration(5)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_getopt.3.adoc b/docs/reference/src/old/nng_getopt.3.adoc
new file mode 100644
index 00000000..364d8f71
--- /dev/null
+++ b/docs/reference/src/old/nng_getopt.3.adoc
@@ -0,0 +1,145 @@
+= nng_getopt(3)
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_getopt - get socket option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_getopt(nng_socket s, const char *opt, void *val, size_t *valszp);
+
+int nng_getopt_bool(nng_socket s, const char *opt, bool *bvalp);
+
+int nng_getopt_int(nng_socket s, const char *opt, int *ivalp);
+
+int nng_getopt_ms(nng_socket s, const char *opt, nng_duration *durp);
+
+int nng_getopt_ptr(nng_socket s, const char *opt, void **ptr);
+
+int nng_getopt_size(nng_socket s, const char *opt, size_t *zp);
+
+int nng_getopt_string(nng_socket s, const char *opt, char **strp);
+
+int nng_getopt_uint64(nng_socket s, const char *opt, uint64_t *u64p);
+
+----
+
+== DESCRIPTION
+
+IMPORTANT: These functions are deprecated.  Please see xref:nng_socket_get.3.adoc[nng_socket_get].
+They may not be present if the library was built with `NNG_ELIDE_DEPRECATED`.
+
+(((options, socket)))
+The `nng_getopt()` functions are used to retrieve option values for
+the xref:nng_socket.5.adoc[socket] _s_.
+The actual options that may be retrieved in this way vary.
+A number of them are documented in xref:nng_options.5.adoc[nng_options(5)].
+
+Additionally transport-specific options and protocol-specific options are
+documented with the transports and protocols themselves.
+
+=== Forms
+
+In all of these forms, the option _opt_ is retrieved from the socket _s_.
+The forms vary based on the type of the option they take.
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+`nng_getopt()`::
+This function is untyped and can be used to retrieve the value of any option.
+The caller must store a pointer to a buffer to receive the value in _val_,
+and the size of the buffer shall be stored at the location referenced by
+_valszp_.
++
+When the function returns, the actual size of the data copied (or that
+would have been copied if sufficient space were present) is stored at
+the location referenced by _valszp_.
+If the caller's buffer is not large enough to hold the entire object,
+then the copy is truncated.
+Therefore the caller should check for truncation by verifying that the
+returned size in _valszp_ does not exceed the original buffer size.
++
+It is acceptable to pass `NULL` for _val_ if the value in _valszp_ is zero.
+This can be used to determine the size of the buffer needed to receive
+the object.
++
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_getopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The value will be stored at _bvalp_.
+
+`nng_getopt_int()`::
+This function is for options which take an integer (`int`).
+The value will be stored at _ivalp_.
+
+`nng_getopt_ms()`::
+This function is used to retrieve time xref:nng_duration.5.adoc[durations]
+(such as timeouts), stored in _durp_ as a number of milliseconds.
+(The special value ((`NNG_DURATION_INFINITE`)) means an infinite amount of time, and
+the special value ((`NNG_DURATION_DEFAULT`)) means a context-specific default.)
+
+`nng_getopt_ptr()`::
+This function is used to retrieve a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed using other functions.
+Note that this form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_getopt_size()`::
+This function is used to retrieve a size into the pointer _zp_,
+typically for buffer sizes, message maximum sizes, and similar options.
+
+`nng_getopt_string()`::
+This function is used to retrieve a string into _strp_.
+This string is created from the source using xref:nng_strdup.3.adoc[`nng_strdup()`]
+and consequently must be freed by the caller using
+xref:nng_strfree.3.adoc[`nng_strfree()`] when it is no longer needed.
+
+`nng_getopt_uint64()`::
+This function is used to retrieve a 64-bit unsigned value into the value
+referenced by _u64p_.
+This is typically used for options related to identifiers, network
+numbers, and similar.
+
+== RETURN VALUES
+
+These functions return 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_EBADTYPE`:: Incorrect type for option.
+`NNG_ECLOSED`:: Parameter _s_ does not refer to an open socket.
+`NNG_EINVAL`:: Size of destination _val_ too small for object.
+`NNG_ENOMEM`:: Insufficient memory exists.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_EWRITEONLY`:: The option _opt_ is write-only.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_dialer_getopt.3.adoc[nng_dialer_getopt(3)],
+xref:nng_listener_getopt.3.adoc[nng_listener_getopt(3)],
+xref:nng_pipe_getopt.3.adoc[nng_pipe_getopt(3)],
+xref:nng_setopt.3.adoc[nng_setopt(3)],
+xref:nng_strdup.3.adoc[nng_strdup(3)],
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_strfree.3.adoc[nng_strfree(3)],
+xref:nng_duration.5.adoc[nng_duration(5)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng_socket.5.adoc[nng_socket(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_inproc_register.3.adoc b/docs/reference/src/old/nng_inproc_register.3.adoc
new file mode 100644
index 00000000..8379a4e8
--- /dev/null
+++ b/docs/reference/src/old/nng_inproc_register.3.adoc
@@ -0,0 +1,47 @@
+= nng_inproc_register(3)
+//
+// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_inproc_register - register inproc transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/inproc/inproc.h>
+
+int nng_inproc_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_inproc_register()` function registers the
+((_inproc_ transport))(((transport, _inproc_))) for use.
+
+NOTE: This function is deprecated, and may be removed from a future release.
+It is no longer necessary to explicitly register transports.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_inproc.7.adoc[nng_inproc(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_ipc_register.3.adoc b/docs/reference/src/old/nng_ipc_register.3.adoc
new file mode 100644
index 00000000..64da4b00
--- /dev/null
+++ b/docs/reference/src/old/nng_ipc_register.3.adoc
@@ -0,0 +1,47 @@
+= nng_ipc_register(3)
+//
+// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_ipc_register - register ipc transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/ipc/ipc.h>
+
+int nng_ipc_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_ipc_register()` function registers the
+((_ipc_ transport))(((transport, _ipc_))) for use.
+
+NOTE: This function is deprecated, and may be removed from a future release.
+It is no longer necessary to explicitly register transports.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_ipc.7.adoc[nng_ipc(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_listener_getopt.3.adoc b/docs/reference/src/old/nng_listener_getopt.3.adoc
new file mode 100644
index 00000000..828f440d
--- /dev/null
+++ b/docs/reference/src/old/nng_listener_getopt.3.adoc
@@ -0,0 +1,150 @@
+= nng_listener_getopt(3)
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_listener_getopt - get listener option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_listener_getopt(nng_listener l, const char *opt, void *val, size_t *valszp);
+
+int nng_listener_getopt_bool(nng_listener l, const char *opt, bool *bvalp);
+
+int nng_listener_getopt_int(nng_listener l, const char *opt, int *ivalp);
+
+int nng_listener_getopt_ms(nng_listener l, const char *opt, nng_duration *durp);
+
+int nng_listener_getopt_ptr(nng_listener l, const char *opt, void **ptr);
+
+int nng_listener_getopt_size(nng_listener l, const char *opt, size_t *zp);
+
+int nng_listener_getopt_sockaddr(nng_listener l, const char *opt, nng_sockaddr *sap);
+
+int nng_listener_getopt_string(nng_listener l, const char *opt, char **strp);
+
+int nng_listener_getopt_uint64(nng_listener l, const char *opt, uint64_t *u64p);
+
+----
+
+== DESCRIPTION
+
+IMPORTANT: These functions are deprecated.  Please see xref:nng_listener_get.3.adoc[nng_listener_get].
+They may not be present if the library was built with `NNG_ELIDE_DEPRECATED`.
+
+(((options, listener)))
+The `nng_listener_getopt()` functions are used to retrieve option values for
+the xref:nng_listener.5.adoc[listener] _l_.
+The actual options that may be retrieved in this way
+vary, and many are documented in xref:nng_options.5.adoc[nng_options(5)].
+
+Additionally some transport-specific options
+are documented with the transports themselves.
+
+=== Forms
+
+In all of these forms, the option _opt_ is retrieved from the listener _l_.
+The forms vary based on the type of the option they take.
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+`nng_listener_getopt()`::
+This function is untyped and can be used to retrieve the value of any option.
+The caller must store a pointer to a buffer to receive the value in _val_,
+and the size of the buffer shall be stored at the location referenced
+by _valszp_. +
+ +
+When the function returns, the actual size of the data copied (or that
+would have been copied if sufficient space were present) is stored at
+the location referenced by _valszp_.
+If the caller's buffer is not large
+enough to hold the entire object, then the copy is truncated.  Therefore
+the caller should validate that the returned size in _valszp_ does not
+exceed the original buffer size to check for truncation. +
+ +
+It is acceptable to pass `NULL` for _val_ if the value in _valszp_ is zero.
+This can be used to determine the size of the buffer needed to receive
+the object.
+
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_listener_getopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The value will be stored at _bvalp_.
+
+`nng_listener_getopt_int()`::
+This function is for options which take an integer (`int`).
+The value will be stored at _ivalp_.
+
+`nng_listener_getopt_ms()`::
+This function is used to retrieve time xref:nng_duration.5.adoc[durations]
+(such as timeouts), stored in _durp_ as a number of milliseconds.
+
+`nng_listener_getopt_ptr()`::
+This function is used to retrieve a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed using other functions.
+Note that this form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_listener_getopt_size()`::
+This function is used to retrieve a size into the pointer _zp_,
+typically for buffer sizes, message maximum sizes, and similar options.
+
+`nng_listener_getopt_sockaddr()`::
+This function is used to retrieve an xref:nng_sockaddr.5.adoc[`nng_sockaddr`]
+into the value referenced by _sap_.
+
+`nng_listener_getopt_string()`::
+This function is used to retrieve a string into _strp_.
+This string is created from the source using xref:nng_strdup.3.adoc[`nng_strdup()`]
+and consequently must be freed by the caller using
+xref:nng_strfree.3.adoc[`nng_strfree()`] when it is no longer needed.
+
+`nng_listener_getopt_uint64()`::
+This function is used to retrieve a 64-bit unsigned value into the value
+referenced by _u64p_.
+This is typically used for options related to identifiers, network
+numbers, and similar.
+
+== RETURN VALUES
+
+These functions return 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_EBADTYPE`:: Incorrect type for option.
+`NNG_ECLOSED`:: Parameter _l_ does not refer to an open listener.
+`NNG_EINVAL`:: Size of destination _val_ too small for object.
+`NNG_ENOMEM`:: Insufficient memory exists.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_EWRITEONLY`:: The option _opt_ is write-only.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_listen.3.adoc[nng_listen(3)],
+xref:nng_listener_create.3.adoc[nng_listener_create(3)]
+xref:nng_listener_setopt.3.adoc[nng_listener_setopt(3)]
+xref:nng_getopt.3.adoc[nng_getopt(3)],
+xref:nng_strdup.3.adoc[nng_strdup(3)],
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_strfree.3.adoc[nng_strfree(3)],
+xref:nng_duration.5.adoc[nng_duration(5)],
+xref:nng_listener.5.adoc[nng_listener(5)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng_sockaddr.5.adoc[nng_sockaddr(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_listener_setopt.3.adoc b/docs/reference/src/old/nng_listener_setopt.3.adoc
new file mode 100644
index 00000000..25411adc
--- /dev/null
+++ b/docs/reference/src/old/nng_listener_setopt.3.adoc
@@ -0,0 +1,136 @@
+= nng_listener_setopt(3)
+//
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_listener_setopt - set listener option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_listener_setopt(nng_listener l, const char *opt, const void *val,
+    size_t valsz);
+    
+int nng_listener_setopt_bool(nng_listener l, const char *opt, bool bval);
+
+int nng_listener_setopt_int(nng_listener l, const char *opt, int ival);
+
+int nng_listener_setopt_ms(nng_listener l, const char *opt, nng_duration dur);
+
+int nng_listener_setopt_ptr(nng_listener l, const char *opt, void *ptr);
+
+int nng_listener_setopt_size(nng_listener l, const char *opt, size_t z);
+
+int nng_listener_setopt_string(nng_listener l, const char *opt, const char *str);
+
+int nng_listener_setopt_uint64(nng_listener l, const char *opt, uint64_t u64);
+
+----
+
+== DESCRIPTION
+
+IMPORTANT: These functions are deprecated.  Please see xref:nng_listener_set.3.adoc[nng_listener_set].
+They may not be present if the library was built with `NNG_ELIDE_DEPRECATED`.
+
+(((options, listener)))
+The `nng_listener_setopt()` functions are used to configure options for
+the xref:nng_listener.5.adoc[listener] _l_.
+The actual options that may be configured in this way
+vary, and many are documented in xref:nng_options.5.adoc[nng_options(5)].
+
+Additionally some transport-specific options
+are documented with the transports themselves.
+
+NOTE: Once a listener has started, it is generally not possible to change
+its configuration.
+
+=== Forms
+
+In all of these forms, the option _opt_ is configured on the listener _l_.
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_listener_setopt()`::
+This function is untyped, and can be used to configure any arbitrary data.
+The _val_ pointer addresses the data to copy, and _valsz_ is the
+size of the objected located at _val_.
+
+`nng_listener_setopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The _bval_ is passed to the option.
+
+`nng_listener_setopt_int()`::
+This function is for options which take an integer (`int`).
+The _ival_ is passed to the option.
+
+`nng_listener_setopt_ms()`::
+This function is used to configure time durations (such as timeouts) using
+type xref:nng_duration.5.adoc[`nng_duration`].
+The duration _dur_ is an integer number of milliseconds.
+
+`nng_listener_setopt_ptr()`::
+This function is used to pass a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed by other functions.
+For example, TLS configuration objects created with
+(xref:nng_tls_config_alloc.3tls.adoc[`nng_tls_config_alloc()`])
+can be passed this way.
+
+NOTE: This form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_listener_setopt_size()`::
+This function is used to configure a size, _z_, typically for buffer sizes,
+message maximum sizes, and similar options.
+
+`nng_listener_setopt_string()`::
+This function is used to pass configure a string, _str_.
+Strings passed this way must be legal UTF-8 or ASCII strings, terminated
+with a `NUL` (`\0`) byte.
+(Other constraints may apply as well, see the documentation for each option
+for details.)
+
+`nng_listener_setopt_uint64()`::
+This function is used to configure a 64-bit unsigned value, _u64_.
+This is typically used for options related to identifiers, network numbers,
+and similar.
+
+== RETURN VALUES
+
+These functions return 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_EBADTYPE`:: Incorrect type for option.
+`NNG_ECLOSED`:: Parameter _l_ does not refer to an open listener.
+`NNG_EINVAL`:: The value being passed is invalid.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_EREADONLY`:: The option _opt_ is read-only.
+`NNG_ESTATE`:: The listener _l_ is already started.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_listen.3.adoc[nng_listen(3)],
+xref:nng_listener_create.3.adoc[nng_listener_create(3)]
+xref:nng_listener_getopt.3.adoc[nng_listener_getopt(3)]
+xref:nng_setopt.3.adoc[nng_setopt(3)],
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_duration.5.adoc[nng_duration(5)],
+xref:nng_listener.5.adoc[nng_listener(5)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_pipe_getopt.3.adoc b/docs/reference/src/old/nng_pipe_getopt.3.adoc
new file mode 100644
index 00000000..648abbcc
--- /dev/null
+++ b/docs/reference/src/old/nng_pipe_getopt.3.adoc
@@ -0,0 +1,155 @@
+= nng_pipe_getopt(3)
+//
+// Copyright 2019 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_pipe_getopt - get pipe option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_pipe_getopt(nng_pipe p, const char *opt, void *val, size_t *valszp);
+
+int nng_pipe_getopt_bool(nng_pipe p, const char *opt, bool *bvalp);
+
+int nng_pipe_getopt_int(nng_pipe p, const char *opt, int *ivalp);
+
+int nng_pipe_getopt_ms(nng_pipe p, const char *opt, nng_duration *durp);
+
+int nng_pipe_getopt_ptr(nng_pipe p, const char *opt, void **ptr);
+
+int nng_pipe_getopt_sockaddr(nng_pipe p, const char *opt, nng_sockaddr *sap);
+
+int nng_pipe_getopt_string(nng_pipe p, const char *opt, char **strp);
+
+int nng_pipe_getopt_size(nng_pipe p, const char *opt, size_t *zp);
+
+int nng_pipe_getopt_uint64(nng_pipe p, const char *opt, uint64_t *u64p);
+
+----
+
+== DESCRIPTION
+
+NOTE: These functions are deprecated.  Please see xref:nng_pipe_get.3.adoc[nng_pipe_get].
+
+(((options, pipe)))
+The `nng_pipe_getopt()` functions are used to retrieve option values for
+the xref:nng_pipe.5.adoc[pipe] _p_.
+The actual options that may be retrieved in this way
+vary, and many are documented in xref:nng_options.5.adoc[nng_options(5)].
+Additionally some transport-specific options and protocol-specific options are
+documented with the transports and protocols themselves.
+
+NOTE: All options on a pipe are read-only values.
+Modification of options may be done before the pipe is created using
+xref:nng_listener_setopt.3.adoc[`nng_listener_setopt()`] or
+xref:nng_dialer_getopt.3.adoc[`nng_dialer_setopt()`].
+
+Any option that is set on a dialer or listener will normally be retrievable
+from pipes created by that dialer or listener.
+
+=== Forms
+
+In all of these forms, the option _opt_ is retrieved from the pipe _p_.
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+`nng_pipe_getopt()`::
+This is untyped, and can be used to retrieve the value of any option.
+A pointer to a buffer to receive the value in _val_, and the size of the
+buffer shall be stored at the location referenced by _valszp_. +
+ +
+When the function returns, the actual size of the data copied (or that
+would have been copied if sufficient space were present) is stored at
+the location referenced by _valszp_.
+If the caller's buffer is not large enough to hold the entire object,
+then the copy is truncated.
+Therefore the caller should check for truncation by verifying that the
+size returned in _valszp_ does not exceed the original buffer size. +
+ +
+It is acceptable to pass `NULL` for _val_ if the value in _valszp_ is zero.
+This can be used to determine the size of the buffer needed to receive
+the object.
+
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_pipe_getopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The value will be stored at _bvalp_.
+
+`nng_pipe_getopt_int()`::
+This function is for options which take an integer (`int`).
+The value will be stored at _ivalp_.
+
+`nng_pipe_getopt_ms()`::
+This function is used to retrieve time durations
+(xref:nng_duration.5.adoc[`nng_duration`]) in milliseconds, which are stored in
+_durp_.
+
+`nng_pipe_getopt_ptr()`::
+This function is used to retrieve a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed using other functions.
+Note that this form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_pipe_getopt_size()`::
+This function is used to retrieve a size into the pointer _zp_,
+typically for buffer sizes, message maximum sizes, and similar options.
+
+`nng_pipe_getopt_sockaddr()`::
+This function is used to retrieve an xref:nng_sockaddr.5.adoc[`nng_sockaddr`]
+into _sap_.
+
+`nng_pipe_getopt_string()`::
+This function is used to retrieve a string into _strp_.
+This string is created from the source using xref:nng_strdup.3.adoc[`nng_strdup()`]
+and consequently must be freed by the caller using
+xref:nng_strfree.3.adoc[`nng_strfree()`] when it is no longer needed.
+
+`nng_pipe_getopt_uint64()`::
+This function is used to retrieve a 64-bit unsigned value into the value
+referenced by _u64p_.
+This is typically used for options
+related to identifiers, network numbers, and similar.
+
+== RETURN VALUES
+
+These functions return 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_EBADTYPE`:: Incorrect type for option.
+`NNG_ECLOSED`:: Parameter _p_ does not refer to an open pipe.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_ENOMEM`:: Insufficient memory exists.
+`NNG_EINVAL`:: Size of destination _val_ too small for object.
+`NNG_EWRITEONLY`:: The option _opt_ is write-only.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_dialer_setopt.3.adoc[nng_dialer_setopt(3)]
+xref:nng_getopt.3.adoc[nng_getopt(3)],
+xref:nng_listener_setopt.3.adoc[nng_listener_setopt(3)]
+xref:nng_msg_get_pipe.3.adoc[nng_msg_get_pipe(3)]
+xref:nng_strdup.3.adoc[nng_strdup(3)],
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_strfree.3.adoc[nng_strfree(3)],
+xref:nng_duration.5.adoc[nng_duration(5)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng_pipe.5.adoc[nng_pipe(5)],
+xref:nng_sockaddr.5.adoc[nng_sockaddr(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_setopt.3.adoc b/docs/reference/src/old/nng_setopt.3.adoc
new file mode 100644
index 00000000..6c21cf95
--- /dev/null
+++ b/docs/reference/src/old/nng_setopt.3.adoc
@@ -0,0 +1,127 @@
+= nng_setopt(3)
+
+// Copyright 2020 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+
+== NAME
+
+nng_setopt - set socket option
+
+== SYNOPSIS
+
+[source, c]
+----
+#include <nng/nng.h>
+
+int nng_setopt(nng_socket s, const char *opt, const void *val, size_t valsz);
+
+int nng_setopt_bool(nng_socket s, const char *opt, bool bval);
+
+int nng_setopt_int(nng_socket s, const char *opt, int ival);
+
+int nng_setopt_ms(nng_socket s, const char *opt, nng_duration dur);
+
+int nng_setopt_ptr(nng_socket s, const char *opt, void *ptr);
+
+int nng_setopt_size(nng_socket s, const char *opt, size_t z);
+
+int nng_setopt_string(nng_socket s, const char *opt, const char *str);
+
+int nng_setopt_uint64(nng_socket s, const char *opt, uint64_t u64);
+
+----
+
+== DESCRIPTION
+
+IMPORTANT: These functions are deprecated.  Please see xref:nng_socket_set.3.adoc[nng_socket_set].
+They may not be present if the library was built with `NNG_ELIDE_DEPRECATED`.
+
+(((options, socket)))
+The `nng_setopt()` functions are used to configure options for
+the socket _s_.
+The actual options that may be configured in this way vary, and are
+specified by _opt_.
+A number of them are documented in xref:nng_options.5.adoc[nng_options(5)].
+
+Additionally some transport-specific and protocol-specific options are
+documented with the transports and protocols themselves.
+
+=== Forms
+
+The details of the type, size, and semantics of the option will depend
+on the actual option, and will be documented with the option itself.
+
+`nng_setopt()`::
+This function is untyped, and can be used to configure any arbitrary data.
+The _val_ pointer addresses the data to copy, and _valsz_ is the
+size of the objected located at _val_.
+
+TIP: It may be easier to use one of the typed forms of this function.
+
+`nng_setopt_bool()`::
+This function is for options which take a Boolean (`bool`).
+The _bval_ is passed to the option.
+
+`nng_setopt_int()`::
+This function is for options which take an integer (`int`).
+The _ival_ is passed to the option.
+
+`nng_setopt_ms()`::
+This function is used to configure time durations (such as timeouts) using
+type xref:nng_duration.5.adoc[`nng_duration`].
+The duration _dur_ is an integer number of milliseconds.
+
+`nng_setopt_ptr()`::
+This function is used to pass a pointer, _ptr_, to structured data.
+The data referenced by _ptr_ is generally managed by other functions.
+For example, TLS configuration objects created with
+(xref:nng_tls_config_alloc.3tls.adoc[`nng_tls_config_alloc()`])
+can be passed this way.
+
+NOTE: This form is somewhat special in that the object is generally
+not copied, but instead the *pointer* to the object is copied.
+
+`nng_setopt_size()`::
+This function is used to configure a size, _z_, typically for buffer sizes,
+message maximum sizes, and similar options.
+
+`nng_setopt_string()`::
+This function is used to pass configure a string, _str_.
+Strings passed this way must be legal UTF-8 or ASCII strings, terminated
+with a `NUL` (`\0`) byte.
+(Other constraints may apply as well, see the documentation for each option
+for details.)
+
+`nng_setopt_uint64()`::
+This function is used to configure a 64-bit unsigned value, _u64_.
+This is typically used for options related to identifiers, network numbers,
+and similar.
+
+== RETURN VALUES
+
+These functions return 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ECLOSED`:: Parameter _s_ does not refer to an open socket.
+`NNG_EINVAL`:: The value being passed is invalid.
+`NNG_ENOTSUP`:: The option _opt_ is not supported.
+`NNG_EREADONLY`:: The option _opt_ is read-only.
+`NNG_ESTATE`:: The socket is in an inappropriate state for setting this option.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_getopt.3.adoc[nng_getopt(3)],
+xref:nng_dialer_setopt.3.adoc[nng_dialer_setopt(3)],
+xref:nng_listener_setopt.3.adoc[nng_listener_setopt(3)],
+xref:nng_strerror.3.adoc[nng_strerror(3)],
+xref:nng_options.5.adoc[nng_options(5)],
+xref:nng_socket.5.adoc[nng_socket(5)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_tcp_register.3.adoc b/docs/reference/src/old/nng_tcp_register.3.adoc
new file mode 100644
index 00000000..3da671a9
--- /dev/null
+++ b/docs/reference/src/old/nng_tcp_register.3.adoc
@@ -0,0 +1,47 @@
+= nng_tcp_register(3)
+//
+// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_tcp_register - register tcp transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/tcp/tcp.h>
+
+int nng_tcp_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_tcp_register()` function registers the
+((_tcp_ transport))(((transport, _tcp_))) for use.
+
+NOTE: This function is deprecated, and may be removed from a future release.
+It is no longer necessary to explicitly register transports.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_tcp.7.adoc[nng_tcp(7)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_tls_register.3.adoc b/docs/reference/src/old/nng_tls_register.3.adoc
new file mode 100644
index 00000000..bfe27e05
--- /dev/null
+++ b/docs/reference/src/old/nng_tls_register.3.adoc
@@ -0,0 +1,44 @@
+= nng_tls_register(3)
+//
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_tls_register - register tls transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/tls/tls.h>
+
+int nng_tls_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_tls_register()` function registers the
+((_tls_ transport))(((transport, _tls_))) for use.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_tls.7.adoc[nng_tls(7)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_ws_register.3.adoc b/docs/reference/src/old/nng_ws_register.3.adoc
new file mode 100644
index 00000000..7a9cc1f3
--- /dev/null
+++ b/docs/reference/src/old/nng_ws_register.3.adoc
@@ -0,0 +1,47 @@
+= nng_ws_register(3)
+//
+// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_ws_register - register WebSocket transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/websocket/ws.h>
+
+int nng_ws_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_ws_register()` function registers the
+((_ws_ transport))(((transport, _ws_))) for use.
+
+NOTE: This function is deprecated, and may be removed from a future release.
+It is no longer necessary to explicitly register transports.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_ws.7.adoc[nng_ws(7)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_wss_register.3.adoc b/docs/reference/src/old/nng_wss_register.3.adoc
new file mode 100644
index 00000000..856fe1c0
--- /dev/null
+++ b/docs/reference/src/old/nng_wss_register.3.adoc
@@ -0,0 +1,47 @@
+= nng_wss_register(3)
+//
+// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_wss_register - register WebSocket secure transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/websocket/ws.h>
+
+int nng_wss_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_wss_register()` function registers the
+((_wss_ transport))(((transport, _wss_))) for use.
+
+NOTE: This function is deprecated, and may be removed from a future release.
+It is no longer necessary to explicitly register transports.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_ws.7.adoc[nng_ws(7)],
+xref:nng.7.adoc[nng(7)]
diff --git a/docs/reference/src/old/nng_zt_register.3.adoc b/docs/reference/src/old/nng_zt_register.3.adoc
new file mode 100644
index 00000000..9c4a4ac4
--- /dev/null
+++ b/docs/reference/src/old/nng_zt_register.3.adoc
@@ -0,0 +1,47 @@
+= nng_zt_register(3)
+//
+// Copyright 2021 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
+//
+// This document is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+== NAME
+
+nng_zt_register - register ZeroTier transport
+
+== SYNOPSIS
+
+[source,c]
+----
+#include <nng/transport/zerotier/zerotier.h>
+
+int nng_zt_register(void);
+----
+
+== DESCRIPTION
+
+The `nng_zt_register()` function registers the
+((_zt_ transport))(((transport, _zt_))) for use.
+
+NOTE: This function is deprecated, and may be removed from a future release.
+It is no longer necessary to explicitly register transports.
+
+== RETURN VALUES
+
+This function returns 0 on success, and non-zero otherwise.
+
+== ERRORS
+
+[horizontal]
+`NNG_ENOMEM`:: Insufficient memory is available.
+`NNG_ENOTSUP`:: The transport is not supported.
+
+== SEE ALSO
+
+[.text-left]
+xref:nng_zerotier.7.adoc[nng_zerotier(7)],
+xref:nng.7.adoc[nng(7)]