protover.h

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/* Copyright (c) 2016-2017, The Tor Project, Inc. */
/* See LICENSE for licensing information */

#ifndef TOR_PROTOVER_H
#define TOR_PROTOVER_H

#include "container.h"

/* This is a guess. */
#define FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS "0.2.9.3-alpha"

#define PROTOVER_HSDIR_V3 2

#define PROTOVER_HS_INTRO_V3 4

#define PROTOVER_HS_RENDEZVOUS_POINT_V3 2

typedef enum protocol_type_t {
  PRT_LINK,
  PRT_LINKAUTH,
  PRT_RELAY,
  PRT_DIRCACHE,
  PRT_HSDIR,
  PRT_HSINTRO,
  PRT_HSREND,
  PRT_DESC,
  PRT_MICRODESC,
  PRT_CONS,
} protocol_type_t;

bool protover_contains_long_protocol_names(const char *s);
int protover_all_supported(const char *s, char **missing);
int protover_is_supported_here(protocol_type_t pr, uint32_t ver);
const char *protover_get_supported_protocols(void);

char *protover_compute_vote(const smartlist_t *list_of_proto_strings,
                            int threshold);
const char *protover_compute_for_old_tor(const char *version);
int protocol_list_supports_protocol(const char *list, protocol_type_t tp,
                                    uint32_t version);
int protocol_list_supports_protocol_or_later(const char *list,
                                             protocol_type_t tp,
                                             uint32_t version);

void protover_free_all(void);

#ifdef PROTOVER_PRIVATE

typedef struct proto_range_t {
  uint32_t low;
  uint32_t high;
} proto_range_t;

typedef struct proto_entry_t {
  char *name;
  smartlist_t *ranges;
} proto_entry_t;

#if !defined(HAVE_RUST) && defined(TOR_UNIT_TESTS)
STATIC smartlist_t *parse_protocol_list(const char *s);
STATIC char *encode_protocol_list(const smartlist_t *sl);
STATIC const char *protocol_type_to_str(protocol_type_t pr);
STATIC int str_to_protocol_type(const char *s, protocol_type_t *pr_out);
STATIC void proto_entry_free_(proto_entry_t *entry);
#endif /* !defined(HAVE_RUST) && defined(TOR_UNIT_TESTS) */

#define proto_entry_free(entry) \
  FREE_AND_NULL(proto_entry_t, proto_entry_free_, (entry))

#endif /* defined(PROTOVER_PRIVATE) */

#endif /* !defined(TOR_PROTOVER_H) */