svn commit: r264361 - head/contrib/netcat
Xin LI
delphij at FreeBSD.org
Fri Apr 11 22:12:32 UTC 2014
Author: delphij
Date: Fri Apr 11 22:12:31 2014
New Revision: 264361
URL: http://svnweb.freebsd.org/changeset/base/264361
Log:
MFV r258194-264360: nc(1) from OpenBSD 5.5.
MFC after: 2 weeks
Modified:
head/contrib/netcat/nc.1
head/contrib/netcat/netcat.c
Directory Properties:
head/contrib/netcat/ (props changed)
Modified: head/contrib/netcat/nc.1
==============================================================================
--- head/contrib/netcat/nc.1 Fri Apr 11 21:55:30 2014 (r264360)
+++ head/contrib/netcat/nc.1 Fri Apr 11 22:12:31 2014 (r264361)
@@ -1,4 +1,4 @@
-.\" $OpenBSD: nc.1,v 1.63 2013/07/16 00:07:52 schwarze Exp $
+.\" $OpenBSD: nc.1,v 1.67 2014/02/26 20:56:11 claudio Exp $
.\"
.\" Copyright (c) 1996 David Sacerdote
.\" All rights reserved.
@@ -27,7 +27,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd March 20, 2013
+.Dd April 11, 2014
.Dt NC 1
.Os
.Sh NAME
@@ -36,7 +36,7 @@
.Sh SYNOPSIS
.Nm nc
.Bk -words
-.Op Fl 46DdEhklNnrStUuvz
+.Op Fl 46DdEFhklNnrStUuvz
.Op Fl e Ar IPsec_policy
.Op Fl I Ar length
.Op Fl i Ar interval
@@ -120,6 +120,21 @@ to be used using the syntax described in
.Xr ipsec_set_policy 3 .
This flag can be specified up to two times, as typically one policy for
each direction is needed.
+.It Fl F
+Pass the first connected socket using
+.Xr sendmsg 2
+to stdout and exit.
+This is useful in conjunction with
+.Fl X
+to have
+.Nm
+perform connection setup with a proxy but then leave the rest of the
+connection to another program (e.g.\&
+.Xr ssh 1
+using the
+.Xr ssh_config 5
+.Cm ProxyUseFdPass
+option).
.It Fl h
Prints out
.Nm
@@ -236,7 +251,6 @@ flag is given.
Set the routing table
.Pq Dq FIB
to be used.
-The default is 0.
.It Fl v
Have
.Nm
@@ -365,7 +379,7 @@ Using a second machine, connect to the l
.Nm
process, feeding it the file which is to be transferred:
.Pp
-.Dl $ nc host.example.com 1234 \*(Lt filename.in
+.Dl $ nc -N host.example.com 1234 \*(Lt filename.in
.Pp
After the file has been transferred, the connection will close automatically.
.Sh TALKING TO SERVERS
Modified: head/contrib/netcat/netcat.c
==============================================================================
--- head/contrib/netcat/netcat.c Fri Apr 11 21:55:30 2014 (r264360)
+++ head/contrib/netcat/netcat.c Fri Apr 11 22:12:31 2014 (r264361)
@@ -1,4 +1,4 @@
-/* $OpenBSD: netcat.c,v 1.112 2013/04/29 00:28:23 okan Exp $ */
+/* $OpenBSD: netcat.c,v 1.117 2013/10/26 21:33:29 sthen Exp $ */
/*
* Copyright (c) 2001 Eric Jackson <ericj at monkey.org>
*
@@ -38,6 +38,7 @@
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/time.h>
+#include <sys/uio.h>
#include <sys/un.h>
#include <netinet/in.h>
@@ -74,6 +75,7 @@
/* Command Line Options */
int dflag; /* detached, no stdin */
+int Fflag; /* fdpass sock to stdout */
unsigned int iflag; /* Interval Flag */
int kflag; /* More than one connect */
int lflag; /* Bind to local port */
@@ -94,7 +96,7 @@ int Iflag; /* TCP receive buffer siz
int Oflag; /* TCP send buffer size */
int Sflag; /* TCP MD5 signature option */
int Tflag = -1; /* IP Type of Service */
-u_int rtableid;
+int rtableid = -1;
int timeout = -1;
int family = AF_UNSPEC;
@@ -106,6 +108,7 @@ void build_ports(char *);
void help(void);
int local_listen(char *, char *, struct addrinfo);
void readwrite(int);
+void fdpass(int nfd) __attribute__((noreturn));
int remote_connect(const char *, const char *, struct addrinfo);
int timeout_connect(int, const struct sockaddr *, socklen_t);
int socks_connect(const char *, const char *, struct addrinfo,
@@ -152,9 +155,12 @@ main(int argc, char *argv[])
host = NULL;
uport = NULL;
sv = NULL;
+#if 0
+ rtableid = getrtable();
+#endif
while ((ch = getopt_long(argc, argv,
- "46DdEe:hI:i:klNnoO:P:p:rSs:tT:UuV:vw:X:x:z",
+ "46DdEe:FhI:i:klNnoO:P:p:rSs:tT:UuV:vw:X:x:z",
longopts, NULL)) != -1) {
switch (ch) {
case '4':
@@ -194,6 +200,9 @@ main(int argc, char *argv[])
errx(1, "IPsec support unavailable.");
#endif
break;
+ case 'F':
+ Fflag = 1;
+ break;
case 'h':
help();
break;
@@ -238,7 +247,7 @@ main(int argc, char *argv[])
case 'V':
if (sysctlbyname("net.fibs", &numfibs, &intsize, NULL, 0) == -1)
errx(1, "Multiple FIBS not supported");
- rtableid = (unsigned int)strtonum(optarg, 0,
+ rtableid = (int)strtonum(optarg, 0,
numfibs - 1, &errstr);
if (errstr)
errx(1, "rtable %s: %s", errstr, optarg);
@@ -508,7 +517,9 @@ main(int argc, char *argv[])
uflag ? "udp" : "tcp",
sv ? sv->s_name : "*");
}
- if (!zflag)
+ if (Fflag)
+ fdpass(s);
+ else if (!zflag)
readwrite(s);
}
}
@@ -631,12 +642,9 @@ remote_connect(const char *host, const c
add_ipsec_policy(s, ipsec_policy[1]);
#endif
- if (rtableid) {
- if (setsockopt(s, SOL_SOCKET, SO_SETFIB, &rtableid,
- sizeof(rtableid)) == -1)
- err(1, "setsockopt(.., SO_SETFIB, %u, ..)",
- rtableid);
- }
+ if (rtableid >= 0 && (setsockopt(s, SOL_SOCKET, SO_SETFIB,
+ &rtableid, sizeof(rtableid)) == -1))
+ err(1, "setsockopt SO_SETFIB");
/* Bind to a local port or source address if specified. */
if (sflag || pflag) {
@@ -743,13 +751,9 @@ local_listen(char *host, char *port, str
res0->ai_protocol)) < 0)
continue;
- if (rtableid) {
- ret = setsockopt(s, SOL_SOCKET, SO_SETFIB, &rtableid,
- sizeof(rtableid));
- if (ret == -1)
- err(1, "setsockopt(.., SO_SETFIB, %u, ..)",
- rtableid);
- }
+ if (rtableid >= 0 && (setsockopt(s, IPPROTO_IP, SO_SETFIB,
+ &rtableid, sizeof(rtableid)) == -1))
+ err(1, "setsockopt SO_SETFIB");
ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
if (ret == -1)
@@ -850,6 +854,66 @@ readwrite(int nfd)
}
}
+/*
+ * fdpass()
+ * Pass the connected file descriptor to stdout and exit.
+ */
+void
+fdpass(int nfd)
+{
+ struct msghdr mh;
+ union {
+ struct cmsghdr hdr;
+ char buf[CMSG_SPACE(sizeof(int))];
+ } cmsgbuf;
+ struct cmsghdr *cmsg;
+ struct iovec iov;
+ char c = '\0';
+ ssize_t r;
+ struct pollfd pfd;
+
+ /* Avoid obvious stupidity */
+ if (isatty(STDOUT_FILENO))
+ errx(1, "Cannot pass file descriptor to tty");
+
+ bzero(&mh, sizeof(mh));
+ bzero(&cmsgbuf, sizeof(cmsgbuf));
+ bzero(&iov, sizeof(iov));
+ bzero(&pfd, sizeof(pfd));
+
+ mh.msg_control = (caddr_t)&cmsgbuf.buf;
+ mh.msg_controllen = sizeof(cmsgbuf.buf);
+ cmsg = CMSG_FIRSTHDR(&mh);
+ cmsg->cmsg_len = CMSG_LEN(sizeof(int));
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_RIGHTS;
+ *(int *)CMSG_DATA(cmsg) = nfd;
+
+ iov.iov_base = &c;
+ iov.iov_len = 1;
+ mh.msg_iov = &iov;
+ mh.msg_iovlen = 1;
+
+ bzero(&pfd, sizeof(pfd));
+ pfd.fd = STDOUT_FILENO;
+ for (;;) {
+ r = sendmsg(STDOUT_FILENO, &mh, 0);
+ if (r == -1) {
+ if (errno == EAGAIN || errno == EINTR) {
+ pfd.events = POLLOUT;
+ if (poll(&pfd, 1, -1) == -1)
+ err(1, "poll");
+ continue;
+ }
+ err(1, "sendmsg");
+ } else if (r == -1)
+ errx(1, "sendmsg: unexpected return value %zd", r);
+ else
+ break;
+ }
+ exit(0);
+}
+
/* Deal with RFC 854 WILL/WONT DO/DONT negotiation. */
void
atelnet(int nfd, unsigned char *buf, unsigned int size)
@@ -1088,6 +1152,7 @@ help(void)
\t-e policy Use specified IPsec policy\n");
#endif
fprintf(stderr, "\
+ \t-F Pass socket fd\n\
\t-h This help text\n\
\t-I length TCP receive buffer length\n\
\t-i secs\t Delay interval for lines sent, ports scanned\n\
@@ -1146,9 +1211,9 @@ usage(int ret)
{
fprintf(stderr,
#ifdef IPSEC
- "usage: nc [-46DdEhklNnrStUuvz] [-e policy] [-I length] [-i interval] [-O length]\n"
+ "usage: nc [-46DdEFhklNnrStUuvz] [-e policy] [-I length] [-i interval] [-O length]\n"
#else
- "usage: nc [-46DdhklNnrStUuvz] [-I length] [-i interval] [-O length]\n"
+ "usage: nc [-46DdFhklNnrStUuvz] [-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"
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