} HEADER;
extern void restart_resolver(void);
+extern void clear_nameservers(void);
+extern void add_nameserver(const char *ipaddr);
extern void add_local_domain(char *hname, size_t size);
extern size_t cres_mem(struct Client* cptr);
extern void delete_resolver_queries(const void *vptr);
extern void gethost_byname(const char *name, dns_callback_f callback, void *ctx);
extern void gethost_byaddr(const struct irc_in_addr *addr, dns_callback_f callback, void *ctx);
+/** Evaluate to non-zero if \a ADDR is an unspecified (all zeros) address. */
+#define irc_in_addr_unspec(ADDR) (((ADDR)->in6_16[0] == 0) \
+ && ((ADDR)->in6_16[1] == 0) \
+ && ((ADDR)->in6_16[2] == 0) \
+ && ((ADDR)->in6_16[3] == 0) \
+ && ((ADDR)->in6_16[4] == 0) \
+ && ((ADDR)->in6_16[6] == 0) \
+ && ((ADDR)->in6_16[7] == 0) \
+ && ((ADDR)->in6_16[5] == 0 \
+ || (ADDR)->in6_16[5] == 65535))
/** Evaluate to non-zero if \a ADDR is a valid address (not all 0s and not all 1s). */
#define irc_in_addr_valid(ADDR) (((ADDR)->in6_16[0] && ~(ADDR)->in6_16[0]) \
|| (ADDR)->in6_16[1] != (ADDR)->in6_16[0] \
|| (ADDR)->in6_16[7] != (ADDR)->in6_16[0])
/** Evaluate to non-zero if \a ADDR (of type struct irc_in_addr) is an IPv4 address. */
#define irc_in_addr_is_ipv4(ADDR) (!(ADDR)->in6_16[0] && !(ADDR)->in6_16[1] && !(ADDR)->in6_16[2] \
- && !(ADDR)->in6_16[3] && !(ADDR)->in6_16[4] && (ADDR)->in6_16[6] \
- && (!(ADDR)->in6_16[5] || (ADDR)->in6_16[5] == 65535))
+ && !(ADDR)->in6_16[3] && !(ADDR)->in6_16[4] \
+ && ((!(ADDR)->in6_16[5] && (ADDR)->in6_16[6]) \
+ || (ADDR)->in6_16[5] == 65535))
/** Evaluate to non-zero if \a A is a different IP than \a B. */
#define irc_in_addr_cmp(A,B) (irc_in_addr_is_ipv4(A) ? ((A)->in6_16[6] != (B)->in6_16[6] \
|| (A)->in6_16[7] != (B)->in6_16[7] || !irc_in_addr_is_ipv4(B)) \