diff options
Diffstat (limited to 'dns.h')
| -rw-r--r-- | dns.h | 18 |
1 files changed, 12 insertions, 6 deletions
@@ -8,18 +8,23 @@ enum { /* Some of DNS types: */ dns_type_mx = 15, dns_type_txt = 16, dns_type_srv = 33 + /* If you need other one -- add it here. */ }; +/* Answers as linked list. */ struct dns_answers { struct dns_answers *next; - char *host; - int type; - unsigned int size; + char *host; /* for which answer is provided */ + int type; /* type of current answer */ + unsigned int size; /* size of data */ void *data; }; -/* For CNAME & TXT data is just 'char *', - * For A data is 'unsigned char *' of size 4. */ + +/* For CNAME & TXT data is just human-readable null-terminated 'char *', + * for A data is 'unsigned char *' of size 4, + * other answers are more complex, + * so functions to access their data are provided: */ char *dns_mx_server(void *data); int dns_mx_preference(void *data); @@ -29,7 +34,8 @@ int dns_srv_port(void *data); int dns_srv_priority(void *data); int dns_srv_weight(void *data); -/* In case of error result is 0. */ + +/* In case of error result is 0, as if server don't know host. */ struct dns_answers *dns_get(const char *server, const char *host, int query); void dns_free(struct dns_answers *answers); |