X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-common%2Fdomain.h;h=14d069d8ac438014cb6fd825aa509892808a0e73;hb=2aa690d481dba89652820faadeed15c8ad896041;hp=0464915f9afd4c717274add1ad02a403026dbd34;hpb=8371548df70d1948bf04140c5f73eddd1edac12b;p=catta diff --git a/avahi-common/domain.h b/avahi-common/domain.h index 0464915..14d069d 100644 --- a/avahi-common/domain.h +++ b/avahi-common/domain.h @@ -24,57 +24,108 @@ /** \file domain.h Domain name handling functions */ - #include #include #include -#ifndef DOXYGEN_SHOULD_SKIP_THIS AVAHI_C_DECL_BEGIN -#endif + +/** The maximum length of a a fully escaped domain name C string. This + * is calculated like this: RFC1034 mandates maximum length of FQDNs + * is 255. The maximum label length is 63. To minimize the number of + * (non-escaped) dots, we comprise our maximum-length domain name of + * four labels รก 63 characters plus three inner dots. Escaping the + * four labels quadruples their length at maximum. An escaped domain + * name has the therefore the maximum length of 63*4*4+3=1011. A + * trailing NUL and perhaps two unnecessary dots leading and trailing + * the string brings us to 1014. */ +#define AVAHI_DOMAIN_NAME_MAX 1014 + +/** Maximum size of an unescaped label */ +#define AVAHI_LABEL_MAX 64 + +/** @{ \name Normalization */ + +/** Normalize a domain name into canonical form. This drops trailing + * dots and removes useless backslash escapes. */ +char *avahi_normalize_name(const char *s, char *ret_s, size_t size); /** Normalize a domain name into canonical form. This drops trailing * dots and removes useless backslash escapes. avahi_free() the * result! */ -char *avahi_normalize_name(const char *s); +char *avahi_normalize_name_strdup(const char *s); -/** Return the local host name. avahi_free() the result! */ -char *avahi_get_host_name(void); +/** @} */ + +/** @{ \name Comparison */ /** Return 1 when the specified domain names are equal, 0 otherwise */ int avahi_domain_equal(const char *a, const char *b); -/** Do a binary comparison of to specified domain names, return -1, 0, or 1, depending on the order. */ -int avahi_binary_domain_cmp(const char *a, const char *b); +/** Return some kind of hash value for the domain, useful for using domains as hash table keys. */ +unsigned avahi_domain_hash(const char *name); + +/** @} */ + +/** @{ \name Escaping */ /** Read the first label from the textual domain name *name, unescape * it and write it to dest, *name is changed to point to the next label*/ char *avahi_unescape_label(const char **name, char *dest, size_t size); /** Escape the domain name in *src and write it to *ret_name */ -char *avahi_escape_label(const uint8_t* src, size_t src_length, char **ret_name, size_t *ret_size); +char *avahi_escape_label(const char* src, size_t src_length, char **ret_name, size_t *ret_size); + +/** @} */ -/** Return 1 when the specified string contains a valid service type, 0 otherwise */ -int avahi_is_valid_service_type(const char *t); +/** @{ \name Validity Checks */ + +/** Return 1 when the specified string contains a valid generic DNS-SD + * service type (i.e. a series of words starting with "_"), 0 + * otherwise */ +int avahi_is_valid_service_type_generic(const char *t); + +/** Return 1 when the specified string contains a valid strict DNS-SD + * service type (i.e. consisting of only two words, the latter being + * either _udp or _tcp), 0 otherwise */ +int avahi_is_valid_service_type_strict(const char *t); + +/** Return 1 when the specified string contains a valid DNS-SD service + * subtype, 0 otherwise */ +int avahi_is_valid_service_subtype(const char *t); /** Return 1 when the specified string contains a valid domain name, 0 otherwise */ int avahi_is_valid_domain_name(const char *t); -/** Return 1 when the specified string contains a valid service name, 0 otherwise */ +/** Return 1 when the specified string contains a valid DNS-SD service name, 0 otherwise */ int avahi_is_valid_service_name(const char *t); /** Return 1 when the specified string contains a valid non-FQDN host name (i.e. without dots), 0 otherwise */ int avahi_is_valid_host_name(const char *t); -/** Return some kind of hash value for the domain, useful for using domains as hash table keys. */ -unsigned avahi_domain_hash(const char *name); +/** Return 1 when the specified string contains a valid FQDN host name (i.e. with more than one label and non-numerical), 0 otherwise. \since 0.6.9 */ +int avahi_is_valid_fqdn(const char *t); + +/** @} */ + +/** @{ \name DNS-SD service name handling */ -/** Returns 1 if the the end labels of domain are eqal to suffix */ -int avahi_domain_ends_with(const char *domain, const char *suffix); +/** Construct a valid complete DNS-SD service name from a name, a type and a domain */ +int avahi_service_name_join(char *p, size_t size, const char *name, const char *type, const char *domain); + +/** Split a full service name into name, type and domain */ +int avahi_service_name_split(const char *p, char *name, size_t name_size, char *type, size_t type_size, char *domain, size_t domain_size); + +/** @} */ + +/** @{ \name DNS-SD Subtype handling */ + +/** Return a pointer to the type section of a subtype i.e. _foo._sub._bar._tcp => _bar._tcp */ +const char *avahi_get_type_from_subtype(const char *t); + +/** @} */ -#ifndef DOXYGEN_SHOULD_SKIP_THIS AVAHI_C_DECL_END -#endif #endif