/*
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* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
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* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
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* Copyright (c) 2017-2018 The strace developers.
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* All rights reserved.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include "netlink.h"
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#include "netlink_sock_diag.h"
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#define XLAT_MACROS_ONLY
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#include "xlat/addrfams.h"
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#undef XLAT_MACROS_ONLY
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static void
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decode_family(struct tcb *const tcp, const uint8_t family,
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const kernel_ulong_t addr, const unsigned int len)
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{
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tprints("{family=");
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printxval(addrfams, family, "AF_???");
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if (len > sizeof(family)) {
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tprints(", ");
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printstr_ex(tcp, addr + sizeof(family),
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len - sizeof(family), QUOTE_FORCE_HEX);
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}
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tprints("}");
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}
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typedef DECL_NETLINK_DIAG_DECODER((*netlink_diag_decoder_t));
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static const struct {
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const netlink_diag_decoder_t request, response;
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} diag_decoders[] = {
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[AF_UNIX] = { decode_unix_diag_req, decode_unix_diag_msg },
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[AF_INET] = { decode_inet_diag_req, decode_inet_diag_msg },
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[AF_INET6] = { decode_inet_diag_req, decode_inet_diag_msg },
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[AF_NETLINK] = { decode_netlink_diag_req, decode_netlink_diag_msg },
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[AF_PACKET] = { decode_packet_diag_req, decode_packet_diag_msg },
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[AF_SMC] = { decode_smc_diag_req, decode_smc_diag_msg },
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};
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bool
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decode_netlink_sock_diag(struct tcb *const tcp,
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const struct nlmsghdr *const nlmsghdr,
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const kernel_ulong_t addr,
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const unsigned int len)
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{
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uint8_t family;
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if (nlmsghdr->nlmsg_type == NLMSG_DONE)
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return false;
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if (!umove_or_printaddr(tcp, addr, &family)) {
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if (family < ARRAY_SIZE(diag_decoders)
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&& len > sizeof(family)) {
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const netlink_diag_decoder_t decoder =
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(nlmsghdr->nlmsg_flags & NLM_F_REQUEST)
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? diag_decoders[family].request
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: diag_decoders[family].response;
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if (decoder) {
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decoder(tcp, nlmsghdr, family, addr, len);
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return true;
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}
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}
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decode_family(tcp, family, addr, len);
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}
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return true;
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}
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