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getaddrinfo is defined to use the AF_* constants, even though perhaps its

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interface ought to have been defined in terms of PF_*. Add a note about
how the distinction has been lost anyway. Fixes PR lib/42384.
This commit is contained in:
dholland 2009-12-14 01:53:31 +00:00
parent 29aefd28c2
commit e2423fa273
1 changed files with 25 additions and 8 deletions
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33
lib/libc/net/getaddrinfo.3
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@ -1,4 +1,4 @@
.\" $NetBSD: getaddrinfo.3,v 1.50 2009/10/02 07:41:08 wiz Exp $
.\" $NetBSD: getaddrinfo.3,v 1.51 2009/12/14 01:53:31 dholland Exp $
.\" $KAME: getaddrinfo.3,v 1.36 2005/01/05 03:23:05 itojun Exp $
.\" $OpenBSD: getaddrinfo.3,v 1.35 2004/12/21 03:40:31 jaredy Exp $
.\"
@ -77,7 +77,7 @@ as defined by
.Bd -literal
struct addrinfo {
int ai_flags; /* input flags */
int ai_family; /* protocol family for socket */
int ai_family; /* address family for socket */
int ai_socktype; /* socket type */
int ai_protocol; /* protocol for socket */
socklen_t ai_addrlen; /* length of socket-address */
@ -93,13 +93,30 @@ The caller can supply the following structure elements in
.Fa hints :
.Bl -tag -width "ai_socktypeXX"
.It Fa ai_family
The protocol family that should be used.
The address
.Pq and protocol
family that should be used.
When
.Fa ai_family
is set to
.Dv PF_UNSPEC ,
it means the caller will accept any protocol family supported by the
.Dv AF_UNSPEC ,
it means the caller will accept any address family supported by the
operating system.
Note that while address families
.Pq Dv AF_*
and protocol families
.Pq Dv PF_*
are theoretically distinct, in practice the distinction has been lost.
.\" (.Dv !? Consistent with usage below though...)
.Dv "RFC 3493"
defines
.Fn getaddrinfo
in terms of the address family constants
.Dv AF_*
even though
.Fa ai_family
is to be passed as a protocol family to
.Xr socket 2 .
.It Fa ai_socktype
Denotes the type of socket that is wanted:
.Dv SOCK_STREAM ,
@ -200,7 +217,7 @@ behaves as if the caller provided a
with
.Fa ai_family
set to
.Dv PF_UNSPEC
.Dv AF_UNSPEC
and all other elements set to zero or
.Dv NULL .
.Pp
@ -341,7 +358,7 @@ int s;
const char *cause = NULL;
memset(\*[Am]hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
error = getaddrinfo("www.kame.net", "http", \*[Am]hints, \*[Am]res0);
if (error) {
@ -384,7 +401,7 @@ int nsock;
const char *cause = NULL;
memset(\*[Am]hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_flags = AI_PASSIVE;
error = getaddrinfo(NULL, "http", \*[Am]hints, \*[Am]res0);