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/*
* Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr>
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017-2018 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include "netlink.h"
#include "netlink_sock_diag.h"
#include "nlattr.h"
#include "print_fields.h"
#include <linux/filter.h>
#include <linux/sock_diag.h>
#include <linux/packet_diag.h>
#include "xlat/af_packet_versions.h"
#include "xlat/packet_diag_attrs.h"
#include "xlat/packet_diag_info_flags.h"
#include "xlat/packet_diag_show.h"
DECL_NETLINK_DIAG_DECODER(decode_packet_diag_req)
{
struct packet_diag_req req = { .sdiag_family = family };
const size_t offset = sizeof(req.sdiag_family);
PRINT_FIELD_XVAL("{", req, sdiag_family, addrfams, "AF_???");
tprints(", ");
if (len >= sizeof(req)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(req) - offset,
(char *) &req + offset)) {
/*
* AF_PACKET currently doesn't support protocol values
* other than 0.
*/
PRINT_FIELD_X("", req, sdiag_protocol);
PRINT_FIELD_U(", ", req, pdiag_ino);
PRINT_FIELD_FLAGS(", ", req, pdiag_show,
packet_diag_show, "PACKET_SHOW_???");
PRINT_FIELD_COOKIE(", ", req, pdiag_cookie);
}
} else
tprints("...");
tprints("}");
}
static bool
decode_packet_diag_info(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct packet_diag_info pinfo;
if (len < sizeof(pinfo))
return false;
if (umove_or_printaddr(tcp, addr, &pinfo))
return true;
PRINT_FIELD_IFINDEX("{", pinfo, pdi_index);
PRINT_FIELD_XVAL(", ", pinfo, pdi_version, af_packet_versions,
"TPACKET_???");
PRINT_FIELD_U(", ", pinfo, pdi_reserve);
PRINT_FIELD_U(", ", pinfo, pdi_copy_thresh);
PRINT_FIELD_U(", ", pinfo, pdi_tstamp);
PRINT_FIELD_FLAGS(", ", pinfo, pdi_flags,
packet_diag_info_flags, "PDI_???");
tprints("}");
return true;
}
static bool
print_packet_diag_mclist(struct tcb *const tcp, void *const elem_buf,
const size_t elem_size, void *const opaque_data)
{
struct packet_diag_mclist *dml = elem_buf;
uint16_t alen = MIN(dml->pdmc_alen, sizeof(dml->pdmc_addr));
PRINT_FIELD_IFINDEX("{", *dml, pdmc_index);
PRINT_FIELD_U(", ", *dml, pdmc_count);
PRINT_FIELD_U(", ", *dml, pdmc_type);
PRINT_FIELD_U(", ", *dml, pdmc_alen);
PRINT_FIELD_STRING(", ", *dml, pdmc_addr, alen, QUOTE_FORCE_HEX);
tprints("}");
return true;
}
static bool
decode_packet_diag_mclist(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct packet_diag_mclist dml;
const size_t nmemb = len / sizeof(dml);
if (!nmemb)
return false;
print_array(tcp, addr, nmemb, &dml, sizeof(dml),
tfetch_mem, print_packet_diag_mclist, 0);
return true;
}
static bool
decode_packet_diag_ring(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
struct packet_diag_ring pdr;
if (len < sizeof(pdr))
return false;
if (umove_or_printaddr(tcp, addr, &pdr))
return true;
PRINT_FIELD_U("{", pdr, pdr_block_size);
PRINT_FIELD_U(", ", pdr, pdr_block_nr);
PRINT_FIELD_U(", ", pdr, pdr_frame_size);
PRINT_FIELD_U(", ", pdr, pdr_frame_nr);
PRINT_FIELD_U(", ", pdr, pdr_retire_tmo);
PRINT_FIELD_U(", ", pdr, pdr_sizeof_priv);
PRINT_FIELD_U(", ", pdr, pdr_features);
tprints("}");
return true;
}
static bool
decode_packet_diag_filter(struct tcb *const tcp,
const kernel_ulong_t addr,
const unsigned int len,
const void *const opaque_data)
{
const unsigned int nmemb = len / sizeof(struct sock_filter);
if (!nmemb || (unsigned short) nmemb != nmemb)
return false;
print_sock_fprog(tcp, addr, nmemb);
return true;
}
static const nla_decoder_t packet_diag_msg_nla_decoders[] = {
[PACKET_DIAG_INFO] = decode_packet_diag_info,
[PACKET_DIAG_MCLIST] = decode_packet_diag_mclist,
[PACKET_DIAG_RX_RING] = decode_packet_diag_ring,
[PACKET_DIAG_TX_RING] = decode_packet_diag_ring,
[PACKET_DIAG_FANOUT] = decode_nla_u32,
[PACKET_DIAG_UID] = decode_nla_uid,
[PACKET_DIAG_MEMINFO] = decode_nla_meminfo,
[PACKET_DIAG_FILTER] = decode_packet_diag_filter
};
DECL_NETLINK_DIAG_DECODER(decode_packet_diag_msg)
{
struct packet_diag_msg msg = { .pdiag_family = family };
size_t offset = sizeof(msg.pdiag_family);
bool decode_nla = false;
PRINT_FIELD_XVAL("{", msg, pdiag_family, addrfams, "AF_???");
tprints(", ");
if (len >= sizeof(msg)) {
if (!umoven_or_printaddr(tcp, addr + offset,
sizeof(msg) - offset,
(char *) &msg + offset)) {
PRINT_FIELD_XVAL("", msg, pdiag_type,
socktypes, "SOCK_???");
PRINT_FIELD_XVAL_SORTED_SIZED(", ", msg, pdiag_num,
ethernet_protocols,
ethernet_protocols_size,
"ETH_P_???");
PRINT_FIELD_U(", ", msg, pdiag_ino);
PRINT_FIELD_COOKIE(", ", msg, pdiag_cookie);
decode_nla = true;
}
} else
tprints("...");
tprints("}");
offset = NLMSG_ALIGN(sizeof(msg));
if (decode_nla && len > offset) {
tprints(", ");
decode_nlattr(tcp, addr + offset, len - offset,
packet_diag_attrs, "PACKET_DIAG_???",
packet_diag_msg_nla_decoders,
ARRAY_SIZE(packet_diag_msg_nla_decoders), NULL);
}
}
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