diff options
| author | Jason Downs <downsj@cvs.openbsd.org> | 1996-07-29 06:51:26 +0000 |
|---|---|---|
| committer | Jason Downs <downsj@cvs.openbsd.org> | 1996-07-29 06:51:26 +0000 |
| commit | 9d937b1782c5ca7f474bda9db172d4e185671625 (patch) | |
| tree | 026305aa359ddbe254cba174178b6959ff59d112 /lib/libc/rpc/bindresvport.c | |
| parent | f4c1df812bce004b8ef7a3daf07d0c2f1465f264 (diff) | |
Reset port range if bind() fails.
Diffstat (limited to 'lib/libc/rpc/bindresvport.c')
| -rw-r--r-- | lib/libc/rpc/bindresvport.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/lib/libc/rpc/bindresvport.c b/lib/libc/rpc/bindresvport.c index 36bda3d1834..48a87f88bae 100644 --- a/lib/libc/rpc/bindresvport.c +++ b/lib/libc/rpc/bindresvport.c @@ -1,4 +1,4 @@ -/* $OpenBSD: bindresvport.c,v 1.3 1996/07/29 06:11:57 downsj Exp $ */ +/* $OpenBSD: bindresvport.c,v 1.4 1996/07/29 06:51:25 downsj Exp $ */ /* $NetBSD: bindresvport.c,v 1.5 1995/06/03 22:37:19 mycroft Exp $ */ /* @@ -33,11 +33,13 @@ #if defined(LIBC_SCCS) && !defined(lint) /*static char *sccsid = "from: @(#)bindresvport.c 1.8 88/02/08 SMI";*/ /*static char *sccsid = "from: @(#)bindresvport.c 2.2 88/07/29 4.0 RPCSRC";*/ -static char *rcsid = "$OpenBSD: bindresvport.c,v 1.3 1996/07/29 06:11:57 downsj Exp $"; +static char *rcsid = "$OpenBSD: bindresvport.c,v 1.4 1996/07/29 06:51:25 downsj Exp $"; #endif /* * Copyright (c) 1987 by Sun Microsystems, Inc. + * + * Portions Copyright(C) 1996, Jason Downs. All rights reserved. */ #include <string.h> @@ -54,7 +56,7 @@ bindresvport(sd, sin) int sd; struct sockaddr_in *sin; { - int on, error; + int on, old, error; struct sockaddr_in myaddr; if (sin == (struct sockaddr_in *)0) { @@ -68,13 +70,27 @@ bindresvport(sd, sin) } if (sin->sin_port == 0) { + int oldlen = sizeof(old); + error = getsockopt(sd, IPPROTO_IP, IP_PORTRANGE, + &old, &oldlen); + if (error < 0) + return(error); + on = IP_PORTRANGE_LOW; error = setsockopt(sd, IPPROTO_IP, IP_PORTRANGE, - (char *)&on, sizeof(on)); + &on, sizeof(on)); if (error < 0) return(error); } error = bind(sd, (struct sockaddr *)sin, sizeof(struct sockaddr_in)); + if (error < 0) { + /* Don't change error or errno. */ + int saved_errno = errno; + + if (setsockopt(sd, IPPROTO_IP, IP_PORTRANGE, + &old, sizeof(old)) < 0) + errno = saved_errno; + } return(error); } |