Dmitry V. Levin
b93d52fe3d
strace is now provided under the terms of the GNU Lesser General Public License version 2.1 or later, see COPYING for more details. strace test suite is now provided under the terms of the GNU General Public License version 2 or later, see tests/COPYING for more details.
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/*
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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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* SPDX-License-Identifier: LGPL-2.1-or-later
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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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