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/*
* Copyright (c) 2016-2022, OARC, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "dnscap_common.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#ifndef __dnscap_dump_cds_h
#define __dnscap_dump_cds_h
#define DUMP_CDS_OK 0
#define DUMP_CDS_EINVAL 1
#define DUMP_CDS_ENOMEM 2
#define DUMP_CDS_ECBOR 3
#define DUMP_CDS_ELDNS 4
#define DUMP_CDS_EWRITE 5
#define DUMP_CDS_FLUSH 6
#define DUMP_CDS_ENOSUP 7
#define DUMP_CDS_EBUF 8
#define CDS_OPTION_RLABELS 0
#define CDS_OPTION_RLABEL_MIN_SIZE 1
#define CDS_OPTION_RDATA_RINDEX_SIZE 2
#define CDS_OPTION_RDATA_RINDEX_MIN_SIZE 3
#define CDS_OPTION_USE_RDATA_INDEX 4
#define CDS_OPTION_RDATA_INDEX_MIN_SIZE 5
#define CDS_DEFAULT_MAX_RLABELS 255
#define CDS_DEFAULT_MIN_RLABEL_SIZE 3
#define CDS_DEFAULT_RDATA_INDEX_MIN_SIZE 5
#define CDS_DEFAULT_RDATA_RINDEX_SIZE 255
#define CDS_DEFAULT_RDATA_RINDEX_MIN_SIZE 5
typedef struct ip_header ip_header_t;
struct ip_header {
unsigned short is_v6 : 1;
unsigned short is_reverse : 1;
unsigned short have_src_addr : 1;
unsigned short have_src_port : 1;
unsigned short have_dest_addr : 1;
unsigned short have_dest_port : 1;
uint8_t bits;
struct in_addr src_addr4;
uint16_t src_port4;
struct in6_addr src_addr6;
uint16_t src_port6;
struct in_addr dest_addr4;
uint16_t dest_port4;
struct in6_addr dest_addr6;
uint16_t dest_port6;
};
typedef struct dns_label dns_label_t;
struct dns_label {
unsigned short is_complete : 1;
unsigned short have_size : 1;
unsigned short have_extension_bits : 1;
unsigned short have_offset : 1;
unsigned short have_label : 1;
unsigned short have_n_offset : 1;
uint8_t size;
uint8_t extension_bits;
uint16_t offset;
uint8_t* offset_p;
uint8_t* label;
size_t n_offset;
};
#define CDS_RLABEL_LABEL_T_LABEL 64
typedef struct dns_rlabel_label dns_rlabel_label_t;
struct dns_rlabel_label {
unsigned short have_n_offset : 1;
uint8_t size;
uint8_t label[CDS_RLABEL_LABEL_T_LABEL];
size_t n_offset;
};
#define CDS_RLABEL_T_LABELS 256
typedef struct dns_rlabel dns_rlabel_t;
struct dns_rlabel {
dns_rlabel_t* next;
dns_rlabel_t* prev;
uint8_t labels;
dns_rlabel_label_t label[CDS_RLABEL_T_LABELS];
};
typedef struct dns_rdata dns_rdata_t;
struct dns_rdata {
unsigned short is_complete : 1;
unsigned short have_labels : 1;
unsigned short have_rlabel_idx : 1;
unsigned short have_rdata : 1;
size_t rdata_len;
uint8_t* rdata;
size_t labels;
dns_label_t* label;
size_t rlabel_idx;
};
typedef struct dns_rr dns_rr_t;
struct dns_rr {
unsigned short is_complete : 1;
unsigned short have_labels : 1;
unsigned short have_rlabel_idx : 1;
unsigned short have_bits : 1;
unsigned short have_type : 1;
unsigned short have_class : 1;
unsigned short have_ttl : 1;
unsigned short have_rdlength : 1;
unsigned short have_rdata : 1;
unsigned short have_mixed_rdata : 1;
unsigned short have_rdata_index : 1;
unsigned short have_rdata_rindex : 1;
size_t labels;
dns_label_t* label;
size_t rlabel_idx;
uint8_t bits;
uint16_t type;
uint16_t class;
uint32_t ttl;
uint16_t rdlength;
uint8_t* rdata;
size_t mixed_rdatas;
dns_rdata_t* mixed_rdata;
size_t rdata_index;
size_t rdata_rindex;
};
typedef struct dns dns_t;
struct dns {
unsigned short header_is_complete : 1;
unsigned short have_id : 1;
unsigned short have_raw : 1;
unsigned short have_cnt_bits : 1;
unsigned short have_qdcount : 1;
unsigned short have_ancount : 1;
unsigned short have_nscount : 1;
unsigned short have_arcount : 1;
unsigned short have_rr_bits : 1;
unsigned short have_questions : 1;
unsigned short have_answers : 1;
unsigned short have_authorities : 1;
unsigned short have_additionals : 1;
int id;
uint16_t raw;
uint8_t cnt_bits;
uint16_t qdcount;
uint16_t ancount;
uint16_t nscount;
uint16_t arcount;
uint8_t rr_bits;
size_t questions;
dns_rr_t* question;
size_t answers;
dns_rr_t* answer;
size_t authorities;
dns_rr_t* authority;
size_t additionals;
dns_rr_t* additional;
};
int cds_set_cbor_size(size_t size);
int cds_set_message_size(size_t size);
int cds_set_max_rlabels(size_t size);
int cds_set_min_rlabel_size(size_t size);
int cds_set_use_rdata_index(int use);
int cds_set_use_rdata_rindex(int use);
int cds_set_rdata_index_min_size(size_t size);
int cds_set_rdata_rindex_min_size(size_t size);
int cds_set_rdata_rindex_size(size_t size);
int output_cds(iaddr from, iaddr to, uint8_t proto, unsigned flags, unsigned sport, unsigned dport, my_bpftimeval ts, const u_char* pkt_copy, size_t olen, const u_char* payload, size_t payloadlen);
int dump_cds(FILE* fp);
int have_cds_support();
#endif /* __dnscap_dump_cds_h */
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