1  /*
       2   * Copyright (c) 2018-2021 Eugene Syromyatnikov <evgsyr@gmail.com>
       3   * All rights reserved.
       4   *
       5   * SPDX-License-Identifier: LGPL-2.1-or-later
       6   */
       7  
       8  #include "defs.h"
       9  #include "netlink_route.h"
      10  #include "nlattr.h"
      11  #include "print_fields.h"
      12  
      13  #include "netlink.h"
      14  #include <linux/mroute.h>
      15  #include <linux/mroute6.h>
      16  #include <linux/rtnetlink.h>
      17  
      18  #include "xlat/rtnl_ip6mra_creport_attr.h"
      19  #include "xlat/rtnl_ip6mra_msg_types.h"
      20  #include "xlat/rtnl_ipmra_creport_attr.h"
      21  #include "xlat/rtnl_ipmra_msg_types.h"
      22  #include "xlat/rtnl_family.h"
      23  
      24  static bool
      25  decode_nla_ipmra_msg_type(struct tcb *const tcp,
      26  			  const kernel_ulong_t addr,
      27  			  const unsigned int len,
      28  			  const void *const opaque_data)
      29  {
      30  	const struct decode_nla_xlat_opts opts = {
      31  		.xlat = rtnl_ipmra_msg_types,
      32  		.dflt = "IGMPMSG_???",
      33  		.size = 1,
      34  	};
      35  
      36  	return decode_nla_xval(tcp, addr, len, &opts);
      37  }
      38  
      39  static const nla_decoder_t rtnl_creport_ipmra_decoders[] = {
      40  	[IPMRA_CREPORT_UNSPEC]		= NULL,
      41  	[IPMRA_CREPORT_MSGTYPE]		= decode_nla_ipmra_msg_type,
      42  	[IPMRA_CREPORT_VIF_ID]		= decode_nla_u32,
      43  	[IPMRA_CREPORT_SRC_ADDR]	= decode_nla_in_addr,
      44  	[IPMRA_CREPORT_DST_ADDR]	= decode_nla_in_addr,
      45  	[IPMRA_CREPORT_PKT]		= NULL, /* raw packet data */
      46  	[IPMRA_CREPORT_TABLE]		= decode_nla_u32,
      47  };
      48  
      49  static bool
      50  decode_nla_ip6mra_msg_type(struct tcb *const tcp,
      51  			   const kernel_ulong_t addr,
      52  			   const unsigned int len,
      53  			   const void *const opaque_data)
      54  {
      55  	const struct decode_nla_xlat_opts opts = {
      56  		.xlat = rtnl_ip6mra_msg_types,
      57  		.dflt = "MRT6MSG_???",
      58  		.size = 1,
      59  	};
      60  
      61  	return decode_nla_xval(tcp, addr, len, &opts);
      62  }
      63  
      64  static const nla_decoder_t rtnl_creport_ip6mra_decoders[] = {
      65  	[IP6MRA_CREPORT_UNSPEC]		= NULL,
      66  	[IP6MRA_CREPORT_MSGTYPE]	= decode_nla_ip6mra_msg_type,
      67  	[IP6MRA_CREPORT_MIF_ID]		= decode_nla_u32,
      68  	[IP6MRA_CREPORT_SRC_ADDR]	= decode_nla_in6_addr,
      69  	[IP6MRA_CREPORT_DST_ADDR]	= decode_nla_in6_addr,
      70  	[IP6MRA_CREPORT_PKT]		= NULL, /* raw packet data */
      71  };
      72  
      73  DECL_NETLINK_ROUTE_DECODER(decode_cachereport)
      74  {
      75  	static const struct af_spec_decoder_desc cachereport_descs[] = {
      76  		{ RTNL_FAMILY_IPMR,
      77  		  rtnl_ipmra_creport_attr, "IPMRA_CREPORT_???",
      78  		  ARRSZ_PAIR(rtnl_creport_ipmra_decoders) },
      79  		{ RTNL_FAMILY_IP6MR,
      80  		  rtnl_ip6mra_creport_attr, "IP6MRA_CREPORT_???",
      81  		  ARRSZ_PAIR(rtnl_creport_ip6mra_decoders) },
      82  	};
      83  
      84  	struct rtgenmsg rtgenmsg = { .rtgen_family = family };
      85  
      86  	tprint_struct_begin();
      87  	tprints_field_name("rtgen_family");
      88  	printxvals_ex(rtgenmsg.rtgen_family, "RTNL_FAMILY_???",
      89  		      XLAT_STYLE_DEFAULT, rtnl_family, addrfams, NULL);
      90  	tprint_struct_end();
      91  
      92  	const size_t offset = NLMSG_ALIGN(sizeof(rtgenmsg));
      93  
      94  	if (len > offset) {
      95  		tprint_array_next();
      96  		decode_nla_af_spec(tcp, addr + offset, len - offset,
      97  				   rtgenmsg.rtgen_family,
      98  				   ARRSZ_PAIR(cachereport_descs));
      99  	}
     100  }