MFC r296503:

Linux accept() system call return EOPNOTSUPP errno instead of EINVAL
for UDP sockets.

MFC r296504:

Does not leak fp. While here remove bogus cast of fp->f_data.

MFC r313913:

Initialize cap_rights before use.

MFC r302213:

Fix a bug introduced in r283433.

[1] Remove unneeded sockaddr conversion before kern_recvit() call as the from
argument is used to record result (the source address of the received message) only.

[2] In Linux the type of msg_namelen member of struct msghdr is signed but native
msg_namelen has a unsigned type (socklen_t). So use the proper storage to fetch fromlen
from userspace and than check the user supplied value and return EINVAL if it is less
than 0 as a Linux do.

Reported by: Thomas Mueller <tmueller at sysgo dot com> [1]
Tested by: Thomas Mueller <tmueller at sysgo dot com> [both]
Reviewed by: kib@

MFC r300431:

Convert proto family in both directions. The linux and native values for
local and inet are identical, but for inet6 values differ.

PR: 155040
Reported by: Simon Walton

MFC r300416:

Add a missing errno translation for SO_ERROR optname.

PR: 135458
Reported by: Stefan Schmidt

MFC r297309:

Whitespaces and style(9) fix. No functional changes.

Revert r297303.

MFC r296503, r296504:

Linux accept() system call return EOPNOTSUPP errno instead of EINVAL for UDP sockets.

MFC r296557:
Add support for IPPROTO_IPV6 socket layer for getsockopt/setsockopt calls.
Also add mapping for several options from RFC 3493 and 3542.

MFC 294233:

Prevent double free of control in common sendmsg path as sosend
already freeing it.

MFC r284166 (by jkim):

Properly initialize flags for accept4(2) not to return spurious EINVAL.
Note this fixes a Linuxulator regression introduced in r283490.

PR: 200662

MFC r283497:

Convert SCM_TIMESTAMP in recvmsg().

MFC r283494:

Fix an mbuf(9) leak in sendmsg() under failure condition and
remove unneeded check for failed M_WAITOK allocation.

MFC r283490:

Since FreeBSD supports SOCK_CLOEXEC & SOCK_NONBLOCK options
remove its emulation via fcntl call from Linuxulator.

MFC r283488:

Implement recvmmsg() and sendmmsg() system calls.

MFC r283437:

To avoid code duplication move open/fcntl definitions to the MI
header file.

MFC r283433:

Rewrite linux_recvfrom. To avoid double conversion of sockaddr use
kern_recvit() directly.
And check fromlen parameter before sockaddr copyin and conversion.

MFC r283427:

Where possible we will use M_LINUX malloc(9) type.
Move M_FUTEX defines to the linux_common.ko.

MFC r283415:

Disable i386 call for x86-64 Linux.

MFC r283413:

64-bit paltforms, like x86_64, do not use multiplexing on
socketcall system calls.

Merge r263233 from HEAD to stable/10:

Update kernel inclusions of capability.h to use capsicum.h instead; some
further refinement is required as some device drivers intended to be
portable over FreeBSD versions rely on __FreeBSD_version to decide whether
to include capability.h.

Sponsored by: Google, Inc.

MFC r276512:
Fix Clang -Wpointer-sign warnings.

Merge r263233 from HEAD to stable/10:

Update kernel inclusions of capability.h to use capsicum.h instead; some
further refinement is required as some device drivers intended to be
portable over FreeBSD versions rely on __FreeBSD_version to decide whether
to include capability.h.

Sponsored by: Google, Inc.

MFC r276512:
Fix Clang -Wpointer-sign warnings.