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/* Copyright (c) 2001 Matej Pfajfar.
* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* @file nodefamily_st.h
* @brief Compact node-family structure
**/
#ifndef TOR_NODEFAMILY_ST_H
#define TOR_NODEFAMILY_ST_H
#include "orconfig.h"
#include "ht.h"
struct nodefamily_t {
/** Entry for this nodefamily_t within the hashtable. */
HT_ENTRY(nodefamily_t) ht_ent;
/** Reference count. (The hashtable is not treated as a reference */
uint32_t refcnt;
/** Number of items encoded in <b>family_members</b>. */
uint32_t n_members;
/* A byte-array encoding the members of this family. We encode each member
* as one byte to indicate whether it's a nickname or a fingerprint, plus
* DIGEST_LEN bytes of data. The entries are lexically sorted.
*/
uint8_t family_members[FLEXIBLE_ARRAY_MEMBER];
};
#define NODEFAMILY_MEMBER_LEN (1+DIGEST_LEN)
/** Tag byte, indicates that the following bytes are a RSA1024 SHA1 ID.
*/
#define NODEFAMILY_BY_RSA_ID 0
/** Tag byte, indicates that the following bytes are a NUL-padded nickname.
*/
#define NODEFAMILY_BY_NICKNAME 1
/**
* Number of bytes to allocate in the array for a nodefamily_t with N members.
**/
#define NODEFAMILY_ARRAY_SIZE(n) \
((n) * NODEFAMILY_MEMBER_LEN)
/**
* Pointer to the i'th member of <b>nf</b>, as encoded.
*/
#define NODEFAMILY_MEMBER_PTR(nf, i) \
(&((nf)->family_members[(i) * NODEFAMILY_MEMBER_LEN]))
#endif /* !defined(TOR_NODEFAMILY_ST_H) */
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