/* Copyright (c) 2016-2017, The Tor Project, Inc. */ /* See LICENSE for licensing information */ /** * \file protover.h * \brief Headers and type declarations for protover.c **/ #ifndef TOR_PROTOVER_H #define TOR_PROTOVER_H #include "container.h" /** The first version of Tor that included "proto" entries in its * descriptors. Authorities should use this to decide whether to * guess proto lines. */ /* This is a guess. */ #define FIRST_TOR_VERSION_TO_ADVERTISE_PROTOCOLS "0.2.9.3-alpha" /** The protover version number that signifies HSDir support for HSv3 */ #define PROTOVER_HSDIR_V3 2 /** The protover version number that signifies HSv3 intro point support */ #define PROTOVER_HS_INTRO_V3 4 /** The protover version number that signifies HSv3 rendezvous point support */ #define PROTOVER_HS_RENDEZVOUS_POINT_V3 2 /** List of recognized subprotocols. */ 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; 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); void protover_free_all(void); #ifdef PROTOVER_PRIVATE /** Represents a range of subprotocols of a given type. All subprotocols * between low and high inclusive are included. */ typedef struct proto_range_t { uint32_t low; uint32_t high; } proto_range_t; /** Represents a set of ranges of subprotocols of a given type. */ typedef struct proto_entry_t { /** The name of the protocol. * * (This needs to handle voting on protocols which * we don't recognize yet, so it's a char* rather than a protocol_type_t.) */ char *name; /** Smartlist of proto_range_t */ smartlist_t *ranges; } proto_entry_t; STATIC smartlist_t *parse_protocol_list(const char *s); STATIC void proto_entry_free(proto_entry_t *entry); 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); #endif /* defined(PROTOVER_PRIVATE) */ #endif /* !defined(TOR_PROTOVER_H) */