Missing options: RES_INSECURE1, RES_INSECURE2, RES_NOALIASES, USE_INET6, ROTATE, NOCHECKNAME, RES_KEEPTSIG, BLAST, USEBSTRING, NOIP6DOTINT, USE_EDNS0, SNGLKUP, SNGLKUPREOP, RES_USE_DNSSEC, NOTLDQUERY, DEFAULT Written from the glibc source and resolv.conf.5. Debian bug #527136 reported by Jakub Wilk <ubanus@xxxxxxxxxxxx> [1] [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=527136 Signed-off-by: Stéphane Aulery <saulery@xxxxxxx> --- man3/resolver.3 | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 81 insertions(+), 5 deletions(-) diff --git a/man3/resolver.3 b/man3/resolver.3 index 19c4192..1b22708 100644 --- a/man3/resolver.3 +++ b/man3/resolver.3 @@ -204,7 +204,7 @@ implemented]. Use TCP connections for queries rather than UDP datagrams. .TP .B RES_PRIMARY -Query primary domain name server only. +Query primary domain name server only. [Not currently implemented]. .TP .B RES_IGNTC Ignore truncation errors. @@ -238,10 +238,86 @@ domain and in parent domains. This option is used by .BR gethostbyname (3). [Enabled by default]. -.PP -This list is not complete. -You can find some other flags described in -.BR resolv.conf (5). +.TP +.B RES_INSECURE1 +Accept a response from a wrong server and show it on stdout (for debug +purpose only). +.TP +.B RES_INSECURE2 +Accept a response which contains a wrong query and show it on stdout (for +debug purpose only). +.TP +.B RES_NOALIASES +Disable usage of +.B HOSTALIASES +environment variable. +.TP +.B RES_USE_INET6 +Try a AAAA query before an A query inside the +.BR gethostbyname () +function, and map IPv4 responses in IPv6 "tunneled form" if no AAAA +records are found but an A record set exists. +.TP +.B RES_ROTATE +Causes round-robin selection of name servers from among those listed. This +has the effect of spreading the query load among all listed servers, rather +than having all clients try the first listed server first every time. +.TP +.B RES_NOCHECKNAME +Disable the modern BIND checking of incoming hostnames and mail names +for invalid characters such as underscore (_), non-ASCII, or control +characters. [Not currently implemented]. +.TP +.B RES_KEEPTSIG +Do not strip TSIG records. [Not currently implemented]. +.TP +.B RES_BLAST +When resolvers want to even out the load on their nameservers, following +them. Note this option overrides +.BR RES_ROTATE . +.TP +.B RES_USEBSTRING +Make reverse IPv6 lookups using the bit-label format described in RFC 2673; +if this option is not set, then nibble format is used (since glibc 2.3.4). +.TP +.B RES_NOIP6DOTINT +Use +.I ip6.arpa +zone in IPv6 reverse lookup instead of +.I ip6.int +which is deprecated since glibc 2.3.4. [Enabled by default]. +.TP +.B RES_USE_EDNS0 +Enables support for the DNS extensions (EDNS0) described in RFC 2671 (since +glibc 2.6). +.TP +.B RES_SNGLKUP +By default, glibc performs IPv4 and IPv6 lookups in parallel since version +2.9. Some appliance DNS servers cannot handle these queries properly and +make the requests time out. This option disables the behavior and makes +glibc perform the IPv6 and IPv4 requests sequentially (at the cost of some +slowdown of the resolving process) (since glibc 2.10). +.TP +.B RES_SNGLKUPREOP +When +.B RES_SNGLKUP +option is enabled, opens a new socket for the each request. +.TP +.B RES_USE_DNSSEC +Use DNSSEC with OK bit in OPT record. This option implies +.BR RES_USE_EDNS0 . +.TP +.B RES_NOTLDQUERY +Do not look up unqualified name as a TLD. +.TP +.B RES_DEFAULT +Default option which implies: +.BR RES_RECURSE , +.BR RES_DEFNAMES , +.BR RES_DNSRCH +and +.BR RES_NOIP6DOTINT . + .SH RETURN VALUE The .BR res_init () -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
