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MFV r249496,249498. The most visible change is that we no longer shuts

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down the connection when stdin closes, by default.  This matches Hobbit's
original netcat and GNU netcat.

Old behavior can be restored with the new -N flag.

MFC after:	2 weeks
This commit is contained in:
delphij 2013-04-15 05:31:59 +00:00
parent 096e091386
commit f60aecd8cc
3 changed files with 23 additions and 14 deletions
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4
contrib/netcat/atomicio.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: atomicio.c,v 1.10 2011/01/08 00:47:19 jeremy Exp $ */
/* $OpenBSD: atomicio.c,v 1.11 2012/12/04 02:24:47 deraadt Exp $ */
/*
* Copyright (c) 2006 Damien Miller. All rights reserved.
* Copyright (c) 2005 Anil Madhavapeddy. All rights reserved.
@ -26,8 +26,6 @@
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <errno.h>
#include <poll.h>
#include <unistd.h>

10
contrib/netcat/nc.1
View File

@ -1,4 +1,4 @@
.\" $OpenBSD: nc.1,v 1.61 2012/07/07 15:33:02 haesbaert Exp $
.\" $OpenBSD: nc.1,v 1.62 2013/03/20 09:27:56 sthen Exp $
.\"
.\" Copyright (c) 1996 David Sacerdote
.\" All rights reserved.
@ -27,7 +27,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd February 7, 2012
.Dd July 7, 2012
.Dt NC 1
.Os
.Sh NAME
@ -36,7 +36,7 @@
.Sh SYNOPSIS
.Nm nc
.Bk -words
.Op Fl 46DdEhklnrStUuvz
.Op Fl 46DdEhklNnrStUuvz
.Op Fl e Ar IPsec_policy
.Op Fl I Ar length
.Op Fl i Ar interval
@ -155,6 +155,10 @@ options.
Additionally, any timeouts specified with the
.Fl w
option are ignored.
.It Fl N
.Xr shutdown 2
the network socket after EOF on the input.
Some servers require this to finish their work.
.It Fl n
Do not do any DNS or service lookups on any specified addresses,
hostnames or ports.

23
contrib/netcat/netcat.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: netcat.c,v 1.109 2012/07/07 15:33:02 haesbaert Exp $ */
/* $OpenBSD: netcat.c,v 1.111 2013/03/20 09:27:56 sthen Exp $ */
/*
* Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
*
@ -77,6 +77,7 @@ int dflag; /* detached, no stdin */
unsigned int iflag; /* Interval Flag */
int kflag; /* More than one connect */
int lflag; /* Bind to local port */
int Nflag; /* shutdown() network socket */
int nflag; /* Don't do name look up */
int FreeBSD_Oflag; /* Do not use TCP options */
char *Pflag; /* Proxy username */
@ -153,7 +154,7 @@ main(int argc, char *argv[])
sv = NULL;
while ((ch = getopt_long(argc, argv,
"46DdEe:hI:i:klnoO:P:p:rSs:tT:UuV:vw:X:x:z",
"46DdEe:hI:i:klNnoO:P:p:rSs:tT:UuV:vw:X:x:z",
longopts, NULL)) != -1) {
switch (ch) {
case '4':
@ -207,6 +208,9 @@ main(int argc, char *argv[])
case 'l':
lflag = 1;
break;
case 'N':
Nflag = 1;
break;
case 'n':
nflag = 1;
break;
@ -424,9 +428,10 @@ main(int argc, char *argv[])
len = sizeof(cliaddr);
connfd = accept(s, (struct sockaddr *)&cliaddr,
&len);
if (connfd == -1)
err(1, "accept");
if (connfd == -1) {
/* For now, all errnos are fatal */
err(1, "accept");
}
if (vflag)
report_connect((struct sockaddr *)&cliaddr, len);
@ -833,7 +838,8 @@ readwrite(int nfd)
if ((n = read(wfd, buf, plen)) < 0)
return;
else if (n == 0) {
shutdown(nfd, SHUT_WR);
if (Nflag)
shutdown(nfd, SHUT_WR);
pfd[1].fd = -1;
pfd[1].events = 0;
} else {
@ -1087,6 +1093,7 @@ help(void)
\t-i secs\t Delay interval for lines sent, ports scanned\n\
\t-k Keep inbound sockets open for multiple connects\n\
\t-l Listen mode, for inbound connects\n\
\t-N Shutdown the network socket after EOF on stdin\n\
\t-n Suppress name/port resolutions\n\
\t--no-tcpopt Disable TCP options\n\
\t-O length TCP send buffer length\n\
@ -1139,9 +1146,9 @@ usage(int ret)
{
fprintf(stderr,
#ifdef IPSEC
"usage: nc [-46DdEhklnrStUuvz] [-e policy] [-I length] [-i interval] [-O length]\n"
"usage: nc [-46DdEhklNnrStUuvz] [-e policy] [-I length] [-i interval] [-O length]\n"
#else
"usage: nc [-46DdhklnrStUuvz] [-I length] [-i interval] [-O length]\n"
"usage: nc [-46DdhklNnrStUuvz] [-I length] [-i interval] [-O length]\n"
#endif
"\t [-P proxy_username] [-p source_port] [-s source] [-T ToS]\n"
"\t [-V rtable] [-w timeout] [-X proxy_protocol]\n"