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| author | ume <ume@FreeBSD.org> | 2015-12-18 17:53:18 +0000 |
|---|---|---|
| committer | ume <ume@FreeBSD.org> | 2015-12-18 17:53:18 +0000 |
| commit | 360683f7540313cc6eba3fc15a17d1911810ad8b (patch) | |
| tree | 2590eceac0a8fcf2d16c1cf1111e68b76f1c98c1 /lib/libc/net/getaddrinfo.3 | |
| parent | 4a57c82f71d4dc58cefcceb5b41b611808ea0a65 (diff) | |
| download | FreeBSD-src-360683f7540313cc6eba3fc15a17d1911810ad8b.zip FreeBSD-src-360683f7540313cc6eba3fc15a17d1911810ad8b.tar.gz | |
Add AI_V4MAPPED and AI_ALL support for getaddrinfo(3).
PR: 198092
MFC after: 1 week
Diffstat (limited to 'lib/libc/net/getaddrinfo.3')
| -rw-r--r-- | lib/libc/net/getaddrinfo.3 | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/lib/libc/net/getaddrinfo.3 b/lib/libc/net/getaddrinfo.3 index 1d6cb56..69601e6 100644 --- a/lib/libc/net/getaddrinfo.3 +++ b/lib/libc/net/getaddrinfo.3 @@ -18,7 +18,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 5, 2015 +.Dd December 19, 2015 .Dt GETADDRINFO 3 .Os .Sh NAME @@ -130,11 +130,13 @@ field to which the parameter points shall be set to zero or be the bitwise-inclusive OR of one or more of the values .Dv AI_ADDRCONFIG , +.Dv AI_ALL , .Dv AI_CANONNAME , .Dv AI_NUMERICHOST , -.Dv AI_NUMERICSERV +.Dv AI_NUMERICSERV , +.Dv AI_PASSIVE and -.Dv AI_PASSIVE . +.Dv AI_V4MAPPED . For a UNIX-domain address, .Fa ai_flags is ignored. @@ -146,6 +148,25 @@ bit is set, IPv4 addresses shall be returned only if an IPv4 address is configured on the local system, and IPv6 addresses shall be returned only if an IPv6 address is configured on the local system. +.It Dv AI_ALL +If the +.Dv AI_ALL +flag is used with the +.Dv AI_V4MAPPED +flag, then +.Fn getaddrinfo +shall return all matching IPv6 and IPv4 addresses. +.Pp +For example, when using the DNS, queries are made for both AAAA records and A records, and +.Fn getaddrinfo +returns the combined results of both queries. +Any IPv4 addresses found are returned as IPv4-mapped IPv6 addresses. +.Pp +The +.Dv AI_ALL +flag without the +.Dv AI_V4MAPPED +flag is ignored. .It Dv AI_CANONNAME If the .Dv AI_CANONNAME @@ -210,6 +231,25 @@ loopback address if is the null pointer and .Dv AI_PASSIVE is not set. +.It Dv AI_V4MAPPED +If the +.Dv AI_V4MAPPED +flag is specified along with an ai_family of +.Dv AF_INET6 , +then +.Fn getaddrinfo +shall return IPv4-mapped IPv6 addresses on finding no matching IPv6 addresses ( +.Fa ai_addrlen +shall be 16). +.Pp +For example, when using the DNS, if no AAAA records are found then a query is made for A records and any found are returned as IPv4-mapped IPv6 addresses. +.Pp +The +.Dv AI_V4MAPPED +flag shall be ignored unless +.Fa ai_family +equals +.Dv AF_INET6 . .El .El .Pp |
