ALWAYS_HARD
ALWAYS_HARD(EACCES, ISC_R_NOPERM);
ALWAYS_HARD(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
ALWAYS_HARD(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
ALWAYS_HARD(EHOSTUNREACH, ISC_R_HOSTUNREACH);
ALWAYS_HARD(EHOSTDOWN, ISC_R_HOSTUNREACH);
ALWAYS_HARD(ENETUNREACH, ISC_R_NETUNREACH);
ALWAYS_HARD(ENOBUFS, ISC_R_NORESOURCES);
ALWAYS_HARD(EPERM, ISC_R_HOSTUNREACH);
ALWAYS_HARD(EPIPE, ISC_R_NOTCONNECTED);
ALWAYS_HARD(ECONNRESET, ISC_R_CONNECTIONRESET);
ALWAYS_HARD(ENOBUFS, ISC_R_NORESOURCES);