/* * include/irc_res.h for referencing functions in src/irc_res.c * * $Id: irc_res.h 447 2006-02-12 02:59:16Z db $ */ #ifndef INCLUDED_irc_res_h #define INCLUDED_irc_res_h #include "listener.h" #include "setup.h" /* Here we define some values lifted from nameser.h */ #define NS_NOTIFY_OP 4 #define NS_INT16SZ 2 #define NS_IN6ADDRSZ 16 #define NS_INADDRSZ 4 #define NS_INT32SZ 4 #define NS_CMPRSFLGS 0xc0 #define NS_MAXCDNAME 255 #define QUERY 0 #define IQUERY 1 #define NO_ERRORS 0 #define SERVFAIL 2 #define NXDOMAIN 3 #define T_A 1 #define T_AAAA 28 #define T_PTR 12 #define T_CNAME 5 #define T_NULL 10 #define C_IN 1 #define QFIXEDSZ 4 #define RRFIXEDSZ 10 #define HFIXEDSZ 12 struct DNSReply { char *h_name; struct irc_ssaddr addr; }; struct DNSQuery { #ifdef _WIN32 dlink_node node; HANDLE handle; char reply[MAXGETHOSTSTRUCT]; #endif void *ptr; /* pointer used by callback to identify request */ void (*callback)(void* vptr, struct DNSReply *reply); /* callback to call */ }; typedef struct { unsigned id :16; /* query identification number */ #ifdef WORDS_BIGENDIAN /* fields in third byte */ unsigned qr: 1; /* response flag */ unsigned opcode: 4; /* purpose of message */ unsigned aa: 1; /* authoritive answer */ unsigned tc: 1; /* truncated message */ unsigned rd: 1; /* recursion desired */ /* fields in fourth byte */ unsigned ra: 1; /* recursion available */ unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ unsigned ad: 1; /* authentic data from named */ unsigned cd: 1; /* checking disabled by resolver */ unsigned rcode :4; /* response code */ #else /* fields in third byte */ unsigned rd :1; /* recursion desired */ unsigned tc :1; /* truncated message */ unsigned aa :1; /* authoritive answer */ unsigned opcode :4; /* purpose of message */ unsigned qr :1; /* response flag */ /* fields in fourth byte */ unsigned rcode :4; /* response code */ unsigned cd: 1; /* checking disabled by resolver */ unsigned ad: 1; /* authentic data from named */ unsigned unused :1; /* unused bits (MBZ as of 4.9.3a3) */ unsigned ra :1; /* recursion available */ #endif /* remaining bytes */ unsigned qdcount :16; /* number of question entries */ unsigned ancount :16; /* number of answer entries */ unsigned nscount :16; /* number of authority entries */ unsigned arcount :16; /* number of resource entries */ } HEADER; extern void init_resolver(void); extern void restart_resolver(void); extern void delete_resolver_queries(const struct DNSQuery *); extern void report_dns_servers(struct Client *); extern void gethost_byname_type(const char *, struct DNSQuery *, int); extern void gethost_byname(const char *, struct DNSQuery *); extern void gethost_byaddr(const struct irc_ssaddr *, struct DNSQuery *); extern void add_local_domain(char *, size_t); #endif