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b977dd1ea5
The KPI for this function was misleading. From the NetLink perspective it looked like a function that: a) allocates new hdr, b) can fail. Neither was true. Let the function return a error code instead of returning the same hdr it was passed to. In case if future Linux NetLink compatibility support calls for reallocating header, pass hdr as pointer to pointer. With KPI that returns a error, propagate domain conversion errors all the way up to NetLink module. This fixes panic when unknown domain is converted to 0xff and this invalid value is passed into NetLink processing. PR: 274536 Reviewed by: melifaro Differential Revision: https://reviews.freebsd.org/D44392
54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _NETLINK_LINUX_VAR_H_
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#define _NETLINK_LINUX_VAR_H_
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#ifdef _KERNEL
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/*
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* The file contains headers for the bridge interface between
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* linux[_common] module and the netlink module
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*/
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struct nlpcb;
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struct nl_pstate;
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struct nl_writer;
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typedef bool msgs_to_linux_cb_t(struct nl_writer *nw, struct nlpcb *nlp);
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typedef int msg_from_linux_cb_t(int netlink_family, struct nlmsghdr **hdr,
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struct nl_pstate *npt);
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struct linux_netlink_provider {
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msgs_to_linux_cb_t *msgs_to_linux;
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msg_from_linux_cb_t *msg_from_linux;
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};
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extern struct linux_netlink_provider *linux_netlink_p;
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#endif
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#endif
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