diff options
Diffstat (limited to 'lib/libc/net/resolver.3')
| -rw-r--r-- | lib/libc/net/resolver.3 | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/libc/net/resolver.3 b/lib/libc/net/resolver.3 index 1fb97f568be3..e06a5fd7c6ac 100644 --- a/lib/libc/net/resolver.3 +++ b/lib/libc/net/resolver.3 @@ -119,7 +119,7 @@ are defined in and are as follows. Options are stored as a simple bit mask containing the bitwise ``or'' of the options enabled. -.Bl -tag -width RES_DEFNAMES +.Bl -tag -width RES_USE_INET6 .It Dv RES_INIT True if the initial name server address and default domain name are initialized (i.e., @@ -176,6 +176,19 @@ This option is enabled by default. This option turns off the user level aliasing feature controlled by the .Dq Ev HOSTALIASES environment variable. Network daemons should set this option. +.It Dv RES_USE_INET6 +Enables support for IPv6-only applications. +This causes IPv4 addresses to be returned as an IPv4 mapped address. +For example, 10.1.1.1 will be returned as ::ffff:10.1.1.1. +The option is meaningful with certain kernel configuration only. +.It Dv RES_USE_EDNS0 +Enables support for OPT pseudo-RR for EDNS0 extension. +With the option, resolver code will attach OPT pseudo-RR into DNS queries, +to inform of our receive buffer size. +The option will allow DNS servers to take advantage of non-default receive +buffer size, and to send larger replies. +DNS query packets with EDNS0 extension is not compatible with +non-EDNS0 DNS servers. .El .Pp The |