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document IP_PORTRANGE

This commit is contained in:
lukem 1998-01-07 23:39:49 +00:00
parent 72f8e09db9
commit 59557ec934
1 changed files with 12 additions and 1 deletions
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13
share/man/man4/ip.4
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@ -1,4 +1,4 @@
.\" $NetBSD: ip.4,v 1.4 1997/01/12 00:59:51 thorpej Exp $
.\" $NetBSD: ip.4,v 1.5 1998/01/07 23:39:49 lukem Exp $
.\"
.\" Copyright (c) 1983, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@ -111,6 +111,17 @@ int ttl = 60; /* max = 255 */
setsockopt(s, IPPROTO_IP, IP_TTL, &ttl, sizeof(ttl));
.Ed
.Pp
.Dv IP_PORTRANGE
controls how ephemeral ports are allocated for
.Dv SOCK_STREAM
and
.Dv SOCK_DGRAM
sockets. For example,
.Bd -literal
int range = IP_PORTRANGE_LOW; /* see <netinet/in.h> */
setsockopt(s, IPPROTO_IP, IP_PORTRANGE, &range, sizeof(range));
.Ed
.Pp
If the
.Dv IP_RECVDSTADDR
option is enabled on a