libnetmap: remove interface name validation

When trying to use a VLAN device (e.g. "em0.123") with a dot
the library fails to parse the interface correctly. The former
pattern is much too restrictiv

libnetmap: remove interface name validation

When trying to use a VLAN device (e.g. "em0.123") with a dot
the library fails to parse the interface correctly. The former
pattern is much too restrictive given that almost all characters
can be coerced into a device name via ifconfig.

Remove the particularly restrictive validation. Some characters
still cannot be used as an interface name as they are used as
delimiters in the syntax, but this allows to be able to use most
of them without an issue.

Submitted by: franco@opnsense.org
Differential Revision: https://reviews.freebsd.org/D42485
Reviewed by: vmaffione

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Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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libnetmap: reset errno in nmreq_register_decode()

The reset is necessary at the beginning of the function, because of
the errno logic in the error path (set errno to EINVAL if not set).
If errno is

libnetmap: reset errno in nmreq_register_decode()

The reset is necessary at the beginning of the function, because of
the errno logic in the error path (set errno to EINVAL if not set).
If errno is already set when calling the function, and the function
fails, the previous errno value will be inherited.

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libnetmap: restore changes in 26c29e743bbdbb82762540f72d4bc449bae2e092

Commit f8113f0a65ada9367bcbfa6e0d5d8a8451dd8ac2 accidentally
reverted some fixes introduced by 26c29e743bbdbb82762540f72d4bc449

libnetmap: restore changes in 26c29e743bbdbb82762540f72d4bc449bae2e092

Commit f8113f0a65ada9367bcbfa6e0d5d8a8451dd8ac2 accidentally
reverted some fixes introduced by 26c29e743bbdbb82762540f72d4bc449bae2e092.
This change restores them.

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libnetmap: add support for the offset features

The companion libnetmap changes for the "offsets" kernel support added
in a6d768d845c173823785c. This includes code to parse the "@offset=NNN"
option t

libnetmap: add support for the offset features

The companion libnetmap changes for the "offsets" kernel support added
in a6d768d845c173823785c. This includes code to parse the "@offset=NNN"
option that can be appended to the port name by any nmport_* application.
Example:
# pkt-gen -i 'netmap:em0@offset=16'

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[libnetmap] Fix 32 bit compilation under gcc-6.4

Use uintptr_t to cast a uint64_t to a pointer type.
Yeah, it isn't technically correct for platforms with pointers
> 64 bits, but it's fine here.

Th

[libnetmap] Fix 32 bit compilation under gcc-6.4

Use uintptr_t to cast a uint64_t to a pointer type.
Yeah, it isn't technically correct for platforms with pointers
> 64 bits, but it's fine here.

This fixes 32 bit compat library builds on amd64 and also
mips32 builds.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D26790

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lib: libnetmap: add missing copyright headers

MFC after: 2 weeks

lib: add libnetmap

This changeset introduces the new libnetmap library for writing
netmap applications.
Before libnetmap, applications could either use the kernel API
directly (e.g. NIOCREGIF/NIOCCT

lib: add libnetmap

This changeset introduces the new libnetmap library for writing
netmap applications.
Before libnetmap, applications could either use the kernel API
directly (e.g. NIOCREGIF/NIOCCTRL) or the simple header-only-library
netmap_user.h (e.g. nm_open(), nm_close(), nm_mmap() etc.)

The new library offers more functionalities than netmap_user.h:
- Support for complex netmap options, such as external memory
allocators or per-buffer offsets. This opens the way to future
extensions.
- More flexibility in the netmap port bind options, such as
non-numeric names for pipes, or the ability to specify the netmap
allocator that must be used for a given port.
- Automatic tracking of the netmap memory regions in use across the
open ports.

At the moment there is no man page, but the libnetmap.h header file
has in-depth documentation.

Reviewed by: hrs
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D26171

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