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network/netcat-openbsd: Updated for version 1.105 (from Debian). 

Apply the patches locally and added a note
about this package being incompatible with nc from Slackware

Signed-off-by: Matteo Bernardini <ponce@slackbuilds.org>
This commit is contained in:
Matteo Bernardini 2012-12-23 11:48:30 +01:00 committed by Robby Workman
parent 36b9d2ef47
commit b49d0a636b
15 changed files with 1956 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
network/netcat-openbsd/README
View File

@ -10,3 +10,7 @@ built-in capabilities.
This package contains the OpenBSD rewrite of netcat, including support
for IPv6, proxies, and Unix sockets. The installed binary is named
"nc.openbsd" and the manpage is as well.
BTW, this package conflicts with the netcat in slackware as it creates
a symbolic link /usr/bin/nc (to let libvirt stuff work correctly), so
remove netcat (nc) from your system before building/installing this.

26
network/netcat-openbsd/netcat-openbsd.SlackBuild
View File

@ -23,11 +23,11 @@
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
PRGNAM=netcat-openbsd
VERSION=${VERSION:-1.89}
VERSION=${VERSION:-1.105}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
DEBVER=4
DEBVER=7
if [ -z "$ARCH" ]; then
case "$( uname -m )" in
@ -56,6 +56,12 @@ else
LIBDIRSUFFIX=""
fi
# Exit if netcat is in the system
if [ -x /usr/bin/nc ]; then
echo " You must remove nc before installing this!"
exit 1
fi
set -e
rm -rf $PKG
@ -64,17 +70,7 @@ mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM-$VERSION
tar xvf $CWD/$PRGNAM\_$VERSION.orig.tar.gz
zcat $CWD/$PRGNAM\_$VERSION-$DEBVER.diff.gz > ./$PRGNAM-$VERSION-$DEBVER.diff
cd $PRGNAM-$VERSION.orig
# Apply Debian patches
patch -p1 < ../$PRGNAM-$VERSION-$DEBVER.diff
for i in $(cat debian/patches/series)
do
echo "** patch $i" 1>&2
cat "debian/patches/$i"
done | patch -p1
cd $PRGNAM-$VERSION
chown -R root:root .
find . \
\( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
@ -82,10 +78,14 @@ find . \
\( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
-exec chmod 644 {} \;
# Apply Debian patches
for i in $CWD/patches/* ; do patch -p1 < $i ; done
make CFLAGS="$SLKCFLAGS -DDEBIAN_VERSION=\"\\\"$DEBVER\\\"\""
mkdir -p $PKG/usr/bin/ $PKG/usr/man/man1/
install -s -m 0755 nc $PKG/usr/bin/nc.openbsd
ln -s /usr/bin/nc.openbsd $PKG/usr/bin/nc
gzip -9c nc.1 > $PKG/usr/man/man1/nc.openbsd.1.gz
mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION

10
network/netcat-openbsd/netcat-openbsd.info
View File

@ -1,12 +1,10 @@
PRGNAM="netcat-openbsd"
VERSION="1.89"
VERSION="1.105"
HOMEPAGE="http://packages.debian.org/sid/netcat-openbsd"
DOWNLOAD="http://ftp.debian.org/debian/pool/main/n/netcat-openbsd/netcat-openbsd_1.89.orig.tar.gz \
http://ftp.debian.org/debian/pool/main/n/netcat-openbsd/netcat-openbsd_1.89-4.diff.gz"
MD5SUM="7238ce15aae43069e96ba7faf03f153e \
1dee057d6fbf6859a7112198cd8c6c56"
DOWNLOAD="http://ponce.cc/slackware/sources/repo/netcat-openbsd_1.105.orig.tar.gz"
MD5SUM="7e67b22f1ad41a1b7effbb59ff28fca1"
DOWNLOAD_x86_64=""
MD5SUM_x86_64=""
REQUIRES=""
REQUIRES="%README% libbsd"
MAINTAINER="Slax-Dude"
EMAIL="jleal@fundilusa.com"

475
network/netcat-openbsd/patches/0001-port-to-linux-with-libsd.patch Normal file
View File

@ -0,0 +1,475 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:59:31 +0800
Subject: port to linux with libsd
---
Makefile | 17 ++++++++--
nc.1 | 4 +--
netcat.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++---------
socks.c | 46 +++++++++++++--------------
4 files changed, 130 insertions(+), 42 deletions(-)
diff --git a/Makefile b/Makefile
index 150f829..96a6587 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,19 @@
-# $OpenBSD: Makefile,v 1.6 2001/09/02 18:45:41 jakob Exp $
+# $OpenBSD: Makefile,v 1.6 2001/09/02 18:45:41 jakob Exp $
PROG= nc
SRCS= netcat.c atomicio.c socks.c
-.include <bsd.prog.mk>
+LIBS= `pkg-config --libs libbsd` -lresolv
+OBJS= $(SRCS:.c=.o)
+CFLAGS= -g -O2
+LDFLAGS= -Wl,--no-add-needed
+
+all: nc
+nc: $(OBJS)
+ $(CC) $(CFLAGS) $(LDFLAGS) $(OBJS) $(LIBS) -o nc
+
+$(OBJS): %.o: %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+ rm -f $(OBJS) nc
diff --git a/nc.1 b/nc.1
index 75d1437..b7014a2 100644
--- a/nc.1
+++ b/nc.1
@@ -146,9 +146,6 @@ Proxy authentication is only supported for HTTP CONNECT proxies at present.
Specifies the source port
.Nm
should use, subject to privilege restrictions and availability.
-It is an error to use this option in conjunction with the
-.Fl l
-option.
.It Fl r
Specifies that source and/or destination ports should be chosen randomly
instead of sequentially within a range or in the order that the system
@@ -170,6 +167,7 @@ Change IPv4 TOS value.
may be one of
.Ar critical ,
.Ar inetcontrol ,
+.Ar lowcost ,
.Ar lowdelay ,
.Ar netcontrol ,
.Ar throughput ,
diff --git a/netcat.c b/netcat.c
index cc4683a..9b2def2 100644
--- a/netcat.c
+++ b/netcat.c
@@ -42,6 +42,46 @@
#include <netinet/ip.h>
#include <arpa/telnet.h>
+#ifndef IPTOS_LOWDELAY
+# define IPTOS_LOWDELAY 0x10
+# define IPTOS_THROUGHPUT 0x08
+# define IPTOS_RELIABILITY 0x04
+# define IPTOS_LOWCOST 0x02
+# define IPTOS_MINCOST IPTOS_LOWCOST
+#endif /* IPTOS_LOWDELAY */
+
+# ifndef IPTOS_DSCP_AF11
+# define IPTOS_DSCP_AF11 0x28
+# define IPTOS_DSCP_AF12 0x30
+# define IPTOS_DSCP_AF13 0x38
+# define IPTOS_DSCP_AF21 0x48
+# define IPTOS_DSCP_AF22 0x50
+# define IPTOS_DSCP_AF23 0x58
+# define IPTOS_DSCP_AF31 0x68
+# define IPTOS_DSCP_AF32 0x70
+# define IPTOS_DSCP_AF33 0x78
+# define IPTOS_DSCP_AF41 0x88
+# define IPTOS_DSCP_AF42 0x90
+# define IPTOS_DSCP_AF43 0x98
+# define IPTOS_DSCP_EF 0xb8
+#endif /* IPTOS_DSCP_AF11 */
+
+#ifndef IPTOS_DSCP_CS0
+# define IPTOS_DSCP_CS0 0x00
+# define IPTOS_DSCP_CS1 0x20
+# define IPTOS_DSCP_CS2 0x40
+# define IPTOS_DSCP_CS3 0x60
+# define IPTOS_DSCP_CS4 0x80
+# define IPTOS_DSCP_CS5 0xa0
+# define IPTOS_DSCP_CS6 0xc0
+# define IPTOS_DSCP_CS7 0xe0
+#endif /* IPTOS_DSCP_CS0 */
+
+#ifndef IPTOS_DSCP_EF
+# define IPTOS_DSCP_EF 0xb8
+#endif /* IPTOS_DSCP_EF */
+
+
#include <err.h>
#include <errno.h>
#include <netdb.h>
@@ -53,6 +93,8 @@
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
+#include <bsd/stdlib.h>
+#include <bsd/string.h>
#include "atomicio.h"
#ifndef SUN_LEN
@@ -118,7 +160,7 @@ main(int argc, char *argv[])
struct servent *sv;
socklen_t len;
struct sockaddr_storage cliaddr;
- char *proxy;
+ char *proxy = NULL;
const char *errstr, *proxyhost = "", *proxyport = NULL;
struct addrinfo proxyhints;
char unix_dg_tmp_socket_buf[UNIX_DG_TMP_SOCKET_SIZE];
@@ -164,7 +206,11 @@ main(int argc, char *argv[])
errx(1, "interval %s: %s", errstr, optarg);
break;
case 'j':
+# if defined(SO_JUMBO)
jflag = 1;
+# else
+ errx(1, "no jumbo frame support available");
+# endif
break;
case 'k':
kflag = 1;
@@ -194,10 +240,14 @@ main(int argc, char *argv[])
uflag = 1;
break;
case 'V':
+# if defined(RT_TABLEID_MAX)
rtableid = (unsigned int)strtonum(optarg, 0,
RT_TABLEID_MAX, &errstr);
if (errstr)
errx(1, "rtable %s: %s", errstr, optarg);
+# else
+ errx(1, "no alternate routing table support available");
+# endif
break;
case 'v':
vflag = 1;
@@ -232,7 +282,11 @@ main(int argc, char *argv[])
errstr, optarg);
break;
case 'S':
+# if defined(TCP_MD5SIG)
Sflag = 1;
+# else
+ errx(1, "no TCP MD5 signature support available");
+# endif
break;
case 'T':
errstr = NULL;
@@ -259,6 +313,15 @@ main(int argc, char *argv[])
if (argv[0] && !argv[1] && family == AF_UNIX) {
host = argv[0];
uport = NULL;
+ } else if (!argv[0] && lflag) {
+ if (sflag)
+ errx(1, "cannot use -s and -l");
+ if (zflag)
+ errx(1, "cannot use -z and -l");
+ if (pflag)
+ uport=pflag;
+ } else if (!lflag && kflag) {
+ errx(1, "cannot use -k without -l");
} else if (argv[0] && !argv[1]) {
if (!lflag)
usage(1);
@@ -270,14 +333,7 @@ main(int argc, char *argv[])
} else
usage(1);
- if (lflag && sflag)
- errx(1, "cannot use -s and -l");
- if (lflag && pflag)
- errx(1, "cannot use -p and -l");
- if (lflag && zflag)
- errx(1, "cannot use -z and -l");
- if (!lflag && kflag)
- errx(1, "must use -l with -k");
+
/* Get name of temporary socket for unix datagram client */
if ((family == AF_UNIX) && uflag && !lflag) {
@@ -286,8 +342,8 @@ main(int argc, char *argv[])
} else {
strlcpy(unix_dg_tmp_socket_buf, "/tmp/nc.XXXXXXXXXX",
UNIX_DG_TMP_SOCKET_SIZE);
- if (mktemp(unix_dg_tmp_socket_buf) == NULL)
- err(1, "mktemp");
+ if (mkstemp(unix_dg_tmp_socket_buf) == -1)
+ err(1, "mkstemp");
unix_dg_tmp_socket = unix_dg_tmp_socket_buf;
}
}
@@ -563,18 +619,22 @@ remote_connect(const char *host, const char *port, struct addrinfo hints)
res0->ai_protocol)) < 0)
continue;
+# if defined(RT_TABLEID_MAX)
if (rtableid) {
if (setsockopt(s, SOL_SOCKET, SO_RTABLE, &rtableid,
sizeof(rtableid)) == -1)
err(1, "setsockopt SO_RTABLE");
}
+# endif
/* Bind to a local port or source address if specified. */
if (sflag || pflag) {
struct addrinfo ahints, *ares;
+# if defined (SO_BINDANY)
/* try SO_BINDANY, but don't insist */
setsockopt(s, SOL_SOCKET, SO_BINDANY, &on, sizeof(on));
+# endif
memset(&ahints, 0, sizeof(struct addrinfo));
ahints.ai_family = res0->ai_family;
ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
@@ -674,15 +734,23 @@ local_listen(char *host, char *port, struct addrinfo hints)
res0->ai_protocol)) < 0)
continue;
+# if defined(RT_TABLEID_MAX)
if (rtableid) {
if (setsockopt(s, IPPROTO_IP, SO_RTABLE, &rtableid,
sizeof(rtableid)) == -1)
err(1, "setsockopt SO_RTABLE");
}
+# endif
+
+ ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
+ if (ret == -1)
+ err(1, NULL);
+# if defined(SO_REUSEPORT)
ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
if (ret == -1)
err(1, NULL);
+# endif
set_common_sockopts(s);
@@ -886,21 +954,25 @@ set_common_sockopts(int s)
{
int x = 1;
+# if defined(TCP_MD5SIG)
if (Sflag) {
if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
&x, sizeof(x)) == -1)
err(1, NULL);
}
+# endif
if (Dflag) {
if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
&x, sizeof(x)) == -1)
err(1, NULL);
}
+# if defined(SO_JUMBO)
if (jflag) {
if (setsockopt(s, SOL_SOCKET, SO_JUMBO,
&x, sizeof(x)) == -1)
err(1, NULL);
}
+# endif
if (Tflag != -1) {
if (setsockopt(s, IPPROTO_IP, IP_TOS,
&Tflag, sizeof(Tflag)) == -1)
@@ -949,6 +1021,7 @@ map_tos(char *s, int *val)
{ "cs7", IPTOS_DSCP_CS7 },
{ "ef", IPTOS_DSCP_EF },
{ "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
+ { "lowcost", IPTOS_LOWCOST },
{ "lowdelay", IPTOS_LOWDELAY },
{ "netcontrol", IPTOS_PREC_NETCONTROL },
{ "reliability", IPTOS_RELIABILITY },
@@ -969,6 +1042,9 @@ map_tos(char *s, int *val)
void
help(void)
{
+# if defined(DEBIAN_VERSION)
+ fprintf(stderr, "OpenBSD netcat (Debian patchlevel " DEBIAN_VERSION ")\n");
+# endif
usage(0);
fprintf(stderr, "\tCommand Summary:\n\
\t-4 Use IPv4\n\
@@ -978,6 +1054,7 @@ help(void)
\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\
+ \t-j Use jumbo frame\n\
\t-k Keep inbound sockets open for multiple connects\n\
\t-l Listen mode, for inbound connects\n\
\t-n Suppress name/port resolutions\n\
@@ -998,15 +1075,15 @@ help(void)
\t-x addr[:port]\tSpecify proxy address and port\n\
\t-z Zero-I/O mode [used for scanning]\n\
Port numbers can be individual or ranges: lo-hi [inclusive]\n");
- exit(1);
+ exit(0);
}
void
usage(int ret)
{
fprintf(stderr,
- "usage: nc [-46DdhklnrStUuvz] [-I length] [-i interval] [-O length]\n"
- "\t [-P proxy_username] [-p source_port] [-s source] [-T ToS]\n"
+ "usage: nc [-46DdhjklnrStUuvz] [-I length] [-i interval] [-O length]\n"
+ "\t [-P proxy_username] [-p source_port] [-s source] [-T toskeyword]\n"
"\t [-V rtable] [-w timeout] [-X proxy_protocol]\n"
"\t [-x proxy_address[:port]] [destination] [port]\n");
if (ret)
diff --git a/socks.c b/socks.c
index 71108d5..befd0a9 100644
--- a/socks.c
+++ b/socks.c
@@ -38,7 +38,7 @@
#include <string.h>
#include <unistd.h>
#include <resolv.h>
-#include <readpassphrase.h>
+#include <bsd/readpassphrase.h>
#include "atomicio.h"
#define SOCKS_PORT "1080"
@@ -167,11 +167,11 @@ socks_connect(const char *host, const char *port,
buf[2] = SOCKS_NOAUTH;
cnt = atomicio(vwrite, proxyfd, buf, 3);
if (cnt != 3)
- err(1, "write failed (%zu/3)", cnt);
+ err(1, "write failed (%zu/3)", (size_t)cnt);
cnt = atomicio(read, proxyfd, buf, 2);
if (cnt != 2)
- err(1, "read failed (%zu/3)", cnt);
+ err(1, "read failed (%zu/3)", (size_t)cnt);
if (buf[1] == SOCKS_NOMETHOD)
errx(1, "authentication method negotiation failed");
@@ -220,23 +220,23 @@ socks_connect(const char *host, const char *port,
cnt = atomicio(vwrite, proxyfd, buf, wlen);
if (cnt != wlen)
- err(1, "write failed (%zu/%zu)", cnt, wlen);
+ err(1, "write failed (%zu/%zu)", (size_t)cnt, (size_t)wlen);
cnt = atomicio(read, proxyfd, buf, 4);
if (cnt != 4)
- err(1, "read failed (%zu/4)", cnt);
+ err(1, "read failed (%zu/4)", (size_t)cnt);
if (buf[1] != 0)
errx(1, "connection failed, SOCKS error %d", buf[1]);
switch (buf[3]) {
case SOCKS_IPV4:
cnt = atomicio(read, proxyfd, buf + 4, 6);
if (cnt != 6)
- err(1, "read failed (%d/6)", cnt);
+ err(1, "read failed (%lu/6)", (unsigned long)cnt);
break;
case SOCKS_IPV6:
cnt = atomicio(read, proxyfd, buf + 4, 18);
if (cnt != 18)
- err(1, "read failed (%d/18)", cnt);
+ err(1, "read failed (%lu/18)", (unsigned long)cnt);
break;
default:
errx(1, "connection failed, unsupported address type");
@@ -256,11 +256,11 @@ socks_connect(const char *host, const char *port,
cnt = atomicio(vwrite, proxyfd, buf, wlen);
if (cnt != wlen)
- err(1, "write failed (%zu/%zu)", cnt, wlen);
+ err(1, "write failed (%zu/%zu)", (size_t)cnt, (size_t)wlen);
cnt = atomicio(read, proxyfd, buf, 8);
if (cnt != 8)
- err(1, "read failed (%zu/8)", cnt);
+ err(1, "read failed (%zu/8)", (size_t)cnt);
if (buf[1] != 90)
errx(1, "connection failed, SOCKS error %d", buf[1]);
} else if (socksv == -1) {
@@ -272,39 +272,39 @@ socks_connect(const char *host, const char *port,
/* Try to be sane about numeric IPv6 addresses */
if (strchr(host, ':') != NULL) {
- r = snprintf(buf, sizeof(buf),
+ r = snprintf((char*)buf, sizeof(buf),
"CONNECT [%s]:%d HTTP/1.0\r\n",
host, ntohs(serverport));
} else {
- r = snprintf(buf, sizeof(buf),
+ r = snprintf((char*)buf, sizeof(buf),
"CONNECT %s:%d HTTP/1.0\r\n",
host, ntohs(serverport));
}
if (r == -1 || (size_t)r >= sizeof(buf))
errx(1, "hostname too long");
- r = strlen(buf);
+ r = strlen((char*)buf);
cnt = atomicio(vwrite, proxyfd, buf, r);
if (cnt != r)
- err(1, "write failed (%zu/%d)", cnt, r);
+ err(1, "write failed (%zu/%d)", (size_t)cnt, (int)r);
if (authretry > 1) {
char resp[1024];
proxypass = getproxypass(proxyuser, proxyhost);
- r = snprintf(buf, sizeof(buf), "%s:%s",
+ r = snprintf((char*)buf, sizeof(buf), "%s:%s",
proxyuser, proxypass);
if (r == -1 || (size_t)r >= sizeof(buf) ||
- b64_ntop(buf, strlen(buf), resp,
+ b64_ntop(buf, strlen((char*)buf), resp,
sizeof(resp)) == -1)
errx(1, "Proxy username/password too long");
- r = snprintf(buf, sizeof(buf), "Proxy-Authorization: "
+ r = snprintf((char*)buf, sizeof((char*)buf), "Proxy-Authorization: "
"Basic %s\r\n", resp);
if (r == -1 || (size_t)r >= sizeof(buf))
errx(1, "Proxy auth response too long");
- r = strlen(buf);
+ r = strlen((char*)buf);
if ((cnt = atomicio(vwrite, proxyfd, buf, r)) != r)
- err(1, "write failed (%zu/%d)", cnt, r);
+ err(1, "write failed (%zu/%d)", (size_t)cnt, r);
}
/* Terminate headers */
@@ -312,22 +312,22 @@ socks_connect(const char *host, const char *port,
err(1, "write failed (2/%d)", r);
/* Read status reply */
- proxy_read_line(proxyfd, buf, sizeof(buf));
+ proxy_read_line(proxyfd, (char*)buf, sizeof(buf));
if (proxyuser != NULL &&
- strncmp(buf, "HTTP/1.0 407 ", 12) == 0) {
+ strncmp((char*)buf, "HTTP/1.0 407 ", 12) == 0) {
if (authretry > 1) {
fprintf(stderr, "Proxy authentication "
"failed\n");
}
close(proxyfd);
goto again;
- } else if (strncmp(buf, "HTTP/1.0 200 ", 12) != 0 &&
- strncmp(buf, "HTTP/1.1 200 ", 12) != 0)
+ } else if (strncmp((char*)buf, "HTTP/1.0 200 ", 12) != 0 &&
+ strncmp((char*)buf, "HTTP/1.1 200 ", 12) != 0)
errx(1, "Proxy error: \"%s\"", buf);
/* Headers continue until we hit an empty line */
for (r = 0; r < HTTP_MAXHDRS; r++) {
- proxy_read_line(proxyfd, buf, sizeof(buf));
+ proxy_read_line(proxyfd, (char*)buf, sizeof(buf));
if (*buf == '\0')
break;
}
--

121
network/netcat-openbsd/patches/0002-connect-timeout.patch Normal file
View File

@ -0,0 +1,121 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 14:43:56 +0800
Subject: connect timeout
---
netcat.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 75 insertions(+), 2 deletions(-)
diff --git a/netcat.c b/netcat.c
index 9b2def2..f3cc8c1 100644
--- a/netcat.c
+++ b/netcat.c
@@ -106,6 +106,10 @@
#define PORT_MAX_LEN 6
#define UNIX_DG_TMP_SOCKET_SIZE 19
+#define CONNECTION_SUCCESS 0
+#define CONNECTION_FAILED 1
+#define CONNECTION_TIMEOUT 2
+
/* Command Line Options */
int dflag; /* detached, no stdin */
unsigned int iflag; /* Interval Flag */
@@ -151,6 +155,9 @@ void set_common_sockopts(int);
int map_tos(char *, int *);
void usage(int);
+static int connect_with_timeout(int fd, const struct sockaddr *sa,
+ socklen_t salen, int ctimeout);
+
int
main(int argc, char *argv[])
{
@@ -651,11 +658,14 @@ remote_connect(const char *host, const char *port, struct addrinfo hints)
set_common_sockopts(s);
- if (timeout_connect(s, res0->ai_addr, res0->ai_addrlen) == 0)
+ if ((error = connect_with_timeout(s, res0->ai_addr, res0->ai_addrlen, timeout))== CONNECTION_SUCCESS)
break;
- else if (vflag)
+ else if (vflag && error == CONNECTION_FAILED)
warn("connect to %s port %s (%s) failed", host, port,
uflag ? "udp" : "tcp");
+ else if (vflag && error == CONNECTION_TIMEOUT)
+ warn("connect to %s port %s (%s) timed out", host, port,
+ uflag ? "udp" : "tcp");
close(s);
s = -1;
@@ -703,6 +713,69 @@ timeout_connect(int s, const struct sockaddr *name, socklen_t namelen)
return (ret);
}
+static int connect_with_timeout(int fd, const struct sockaddr *sa,
+ socklen_t salen, int ctimeout)
+{
+ int err;
+ struct timeval tv, *tvp = NULL;
+ fd_set connect_fdset;
+ socklen_t len;
+ int orig_flags;
+
+ orig_flags = fcntl(fd, F_GETFL, 0);
+ if (fcntl(fd, F_SETFL, orig_flags | O_NONBLOCK) < 0 ) {
+ warn("can't set O_NONBLOCK - timeout not available");
+ if (connect(fd, sa, salen) == 0)
+ return CONNECTION_SUCCESS;
+ else
+ return CONNECTION_FAILED;
+ }
+
+ /* set connect timeout */
+ if (ctimeout > 0) {
+ tv.tv_sec = (time_t)ctimeout/1000;
+ tv.tv_usec = 0;
+ tvp = &tv;
+ }
+
+ /* attempt the connection */
+ err = connect(fd, sa, salen);
+ if (err != 0 && errno == EINPROGRESS) {
+ /* connection is proceeding
+ * it is complete (or failed) when select returns */
+
+ /* initialize connect_fdset */
+ FD_ZERO(&connect_fdset);
+ FD_SET(fd, &connect_fdset);
+
+ /* call select */
+ do {
+ err = select(fd + 1, NULL, &connect_fdset,
+ NULL, tvp);
+ } while (err < 0 && errno == EINTR);
+
+ /* select error */
+ if (err < 0)
+ errx(1,"select error: %s", strerror(errno));
+ /* we have reached a timeout */
+ if (err == 0)
+ return CONNECTION_TIMEOUT;
+ /* select returned successfully, but we must test socket
+ * error for result */
+ len = sizeof(err);
+ if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &err, &len) < 0)
+ errx(1, "getsockopt error: %s", strerror(errno));
+ /* setup errno according to the result returned by
+ * getsockopt */
+ if (err != 0)
+ errno = err;
+ }
+
+ /* return aborted if an error occured, and valid otherwise */
+ fcntl(fd, F_SETFL, orig_flags);
+ return (err != 0)? CONNECTION_FAILED : CONNECTION_SUCCESS;
+}
+
/*
* local_listen()
* Returns a socket listening on a local port, binds to specified source
--

34
network/netcat-openbsd/patches/0003-get-sev-by-name.patch Normal file
View File

@ -0,0 +1,34 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 14:45:08 +0800
Subject: get sev by name
---
netcat.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/netcat.c b/netcat.c
index f3cc8c1..d912544 100644
--- a/netcat.c
+++ b/netcat.c
@@ -949,12 +949,19 @@ atelnet(int nfd, unsigned char *buf, unsigned int size)
void
build_ports(char *p)
{
+ struct servent *sv;
const char *errstr;
char *n;
int hi, lo, cp;
int x = 0;
- if ((n = strchr(p, '-')) != NULL) {
+ sv = getservbyname(p, uflag ? "udp" : "tcp");
+ if (sv) {
+ portlist[0] = calloc(1, PORT_MAX_LEN);
+ if (portlist[0] == NULL)
+ err(1, NULL);
+ snprintf(portlist[0], PORT_MAX_LEN, "%d", ntohs(sv->s_port));
+ } else if ((n = strchr(p, '-')) != NULL) {
*n = '\0';
n++;
--

59
network/netcat-openbsd/patches/0004-poll-hup.patch Normal file
View File

@ -0,0 +1,59 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:08:33 +0800
Subject: poll hup
---
netcat.c | 24 +++++++++++++++++-------
1 file changed, 17 insertions(+), 7 deletions(-)
diff --git a/netcat.c b/netcat.c
index d912544..fdaca44 100644
--- a/netcat.c
+++ b/netcat.c
@@ -884,9 +884,7 @@ readwrite(int nfd)
if ((n = read(nfd, buf, plen)) < 0)
return;
else if (n == 0) {
- shutdown(nfd, SHUT_RD);
- pfd[0].fd = -1;
- pfd[0].events = 0;
+ goto shutdown_rd;
} else {
if (tflag)
atelnet(nfd, buf, n);
@@ -894,18 +892,30 @@ readwrite(int nfd)
return;
}
}
+ else if (pfd[0].revents & POLLHUP) {
+ shutdown_rd:
+ shutdown(nfd, SHUT_RD);
+ pfd[0].fd = -1;
+ pfd[0].events = 0;
+ }
- if (!dflag && pfd[1].revents & POLLIN) {
+ if (!dflag) {
+ if(pfd[1].revents & POLLIN) {
if ((n = read(wfd, buf, plen)) < 0)
return;
else if (n == 0) {
- shutdown(nfd, SHUT_WR);
- pfd[1].fd = -1;
- pfd[1].events = 0;
+ goto shutdown_wr;
} else {
if (atomicio(vwrite, nfd, buf, n) != n)
return;
}
+ }
+ else if (pfd[1].revents & POLLHUP) {
+ shutdown_wr:
+ shutdown(nfd, SHUT_WR);
+ pfd[1].fd = -1;
+ pfd[1].events = 0;
+ }
}
}
}
--

108
network/netcat-openbsd/patches/0005-send-crlf.patch Normal file
View File

@ -0,0 +1,108 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 14:57:45 +0800
Subject: send crlf
---
nc.1 | 6 ++++--
netcat.c | 21 +++++++++++++++++----
2 files changed, 21 insertions(+), 6 deletions(-)
diff --git a/nc.1 b/nc.1
index b7014a2..af44976 100644
--- a/nc.1
+++ b/nc.1
@@ -34,7 +34,7 @@
.Sh SYNOPSIS
.Nm nc
.Bk -words
-.Op Fl 46DdhklnrStUuvz
+.Op Fl 46CDdhklnrStUuvz
.Op Fl I Ar length
.Op Fl i Ar interval
.Op Fl O Ar length
@@ -98,6 +98,8 @@ to use IPv4 addresses only.
Forces
.Nm
to use IPv6 addresses only.
+.It Fl C
+Send CRLF as line-ending.
.It Fl D
Enable debugging on the socket.
.It Fl d
@@ -355,7 +357,7 @@ More complicated examples can be built up when the user knows the format
of requests required by the server.
As another example, an email may be submitted to an SMTP server using:
.Bd -literal -offset indent
-$ nc localhost 25 \*(Lt\*(Lt EOF
+$ nc [\-C] localhost 25 \*(Lt\*(Lt EOF
HELO host.example.com
MAIL FROM:\*(Ltuser@host.example.com\*(Gt
RCPT TO:\*(Ltuser2@host.example.com\*(Gt
diff --git a/netcat.c b/netcat.c
index fdaca44..4f4d2bf 100644
--- a/netcat.c
+++ b/netcat.c
@@ -111,6 +111,7 @@
#define CONNECTION_TIMEOUT 2
/* Command Line Options */
+int Cflag = 0; /* CRLF line-ending */
int dflag; /* detached, no stdin */
unsigned int iflag; /* Interval Flag */
int jflag; /* use jumbo frames if we can */
@@ -180,7 +181,7 @@ main(int argc, char *argv[])
sv = NULL;
while ((ch = getopt(argc, argv,
- "46DdhI:i:jklnO:P:p:rSs:tT:UuV:vw:X:x:z")) != -1) {
+ "46CDdhI:i:jklnO:P:p:rSs:tT:UuV:vw:X:x:z")) != -1) {
switch (ch) {
case '4':
family = AF_INET;
@@ -309,6 +310,9 @@ main(int argc, char *argv[])
if (Tflag < 0 || Tflag > 255 || errstr || errno)
errx(1, "illegal tos value %s", optarg);
break;
+ case 'C':
+ Cflag = 1;
+ break;
default:
usage(1);
}
@@ -906,8 +910,16 @@ readwrite(int nfd)
else if (n == 0) {
goto shutdown_wr;
} else {
- if (atomicio(vwrite, nfd, buf, n) != n)
- return;
+ if ((Cflag) && (buf[n-1]=='\n')) {
+ if (atomicio(vwrite, nfd, buf, n-1) != (n-1))
+ return;
+ if (atomicio(vwrite, nfd, "\r\n", 2) != 2)
+ return;
+ }
+ else {
+ if (atomicio(vwrite, nfd, buf, n) != n)
+ return;
+ }
}
}
else if (pfd[1].revents & POLLHUP) {
@@ -1139,6 +1151,7 @@ help(void)
fprintf(stderr, "\tCommand Summary:\n\
\t-4 Use IPv4\n\
\t-6 Use IPv6\n\
+ \t-C Send CRLF as line-ending\n\
\t-D Enable the debug socket option\n\
\t-d Detach from stdin\n\
\t-h This help text\n\
@@ -1172,7 +1185,7 @@ void
usage(int ret)
{
fprintf(stderr,
- "usage: nc [-46DdhjklnrStUuvz] [-I length] [-i interval] [-O length]\n"
+ "usage: nc [-46CDdhjklnrStUuvz] [-I length] [-i interval] [-O length]\n"
"\t [-P proxy_username] [-p source_port] [-s source] [-T toskeyword]\n"
"\t [-V rtable] [-w timeout] [-X proxy_protocol]\n"
"\t [-x proxy_address[:port]] [destination] [port]\n");
--

133
network/netcat-openbsd/patches/0006-quit-timer.patch Normal file
View File

@ -0,0 +1,133 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:16:04 +0800
Subject: quit timer
---
nc.1 | 5 +++++
netcat.c | 38 +++++++++++++++++++++++++++++++++-----
2 files changed, 38 insertions(+), 5 deletions(-)
diff --git a/nc.1 b/nc.1
index af44976..0d92b74 100644
--- a/nc.1
+++ b/nc.1
@@ -40,6 +40,7 @@
.Op Fl O Ar length
.Op Fl P Ar proxy_username
.Op Fl p Ar source_port
+.Op Fl q Ar seconds
.Op Fl s Ar source
.Op Fl T Ar toskeyword
.Op Fl V Ar rtable
@@ -148,6 +149,10 @@ Proxy authentication is only supported for HTTP CONNECT proxies at present.
Specifies the source port
.Nm
should use, subject to privilege restrictions and availability.
+.It Fl q Ar seconds
+after EOF on stdin, wait the specified number of seconds and then quit. If
+.Ar seconds
+is negative, wait forever.
.It Fl r
Specifies that source and/or destination ports should be chosen randomly
instead of sequentially within a range or in the order that the system
diff --git a/netcat.c b/netcat.c
index 4f4d2bf..29ecf1a 100644
--- a/netcat.c
+++ b/netcat.c
@@ -86,6 +86,7 @@
#include <errno.h>
#include <netdb.h>
#include <poll.h>
+#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
@@ -120,6 +121,7 @@ int lflag; /* Bind to local port */
int nflag; /* Don't do name look up */
char *Pflag; /* Proxy username */
char *pflag; /* Localport flag */
+int qflag = 0; /* Quit after some secs */
int rflag; /* Random ports flag */
char *sflag; /* Source Address */
int tflag; /* Telnet Emulation */
@@ -158,6 +160,7 @@ void usage(int);
static int connect_with_timeout(int fd, const struct sockaddr *sa,
socklen_t salen, int ctimeout);
+static void quit();
int
main(int argc, char *argv[])
@@ -181,7 +184,7 @@ main(int argc, char *argv[])
sv = NULL;
while ((ch = getopt(argc, argv,
- "46CDdhI:i:jklnO:P:p:rSs:tT:UuV:vw:X:x:z")) != -1) {
+ "46CDdhI:i:jklnO:P:p:q:rSs:tT:UuV:vw:X:x:z")) != -1) {
switch (ch) {
case '4':
family = AF_INET;
@@ -235,6 +238,11 @@ main(int argc, char *argv[])
case 'p':
pflag = optarg;
break;
+ case 'q':
+ qflag = strtonum(optarg, INT_MIN, INT_MAX, &errstr);
+ if (errstr)
+ errx(1, "quit timer %s: %s", errstr, optarg);
+ break;
case 'r':
rflag = 1;
break;
@@ -924,9 +932,18 @@ readwrite(int nfd)
}
else if (pfd[1].revents & POLLHUP) {
shutdown_wr:
+ /* if the user asked to exit on EOF, do it */
+ if (qflag == 0) {
shutdown(nfd, SHUT_WR);
- pfd[1].fd = -1;
- pfd[1].events = 0;
+ close(wfd);
+ }
+ /* if user asked to die after a while, arrange for it */
+ if (qflag > 0) {
+ signal(SIGALRM, quit);
+ alarm(qflag);
+ }
+ pfd[1].fd = -1;
+ pfd[1].events = 0;
}
}
}
@@ -1164,6 +1181,7 @@ help(void)
\t-O length TCP send buffer length\n\
\t-P proxyuser\tUsername for proxy authentication\n\
\t-p port\t Specify local port for remote connects\n\
+ \t-q secs\t quit after EOF on stdin and delay of secs\n\
\t-r Randomize remote ports\n\
\t-S Enable the TCP MD5 signature option\n\
\t-s addr\t Local source address\n\
@@ -1186,9 +1204,19 @@ usage(int ret)
{
fprintf(stderr,
"usage: nc [-46CDdhjklnrStUuvz] [-I length] [-i interval] [-O length]\n"
- "\t [-P proxy_username] [-p source_port] [-s source] [-T toskeyword]\n"
- "\t [-V rtable] [-w timeout] [-X proxy_protocol]\n"
+ "\t [-P proxy_username] [-p source_port] [-q seconds] [-s source]\n"
+ "\t [-T toskeyword] [-V rtable] [-w timeout] [-X proxy_protocol]\n"
"\t [-x proxy_address[:port]] [destination] [port]\n");
if (ret)
exit(1);
}
+
+/*
+ * quit()
+ * handler for a "-q" timeout (exit 0 instead of 1)
+ */
+static void quit()
+{
+ /* XXX: should explicitly close fds here */
+ exit(0);
+}
--

60
network/netcat-openbsd/patches/0007-udp-scan-timeout.patch Normal file
View File

@ -0,0 +1,60 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:29:37 +0800
Subject: udp scan timeout
---
netcat.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/netcat.c b/netcat.c
index 29ecf1a..baab909 100644
--- a/netcat.c
+++ b/netcat.c
@@ -111,6 +111,8 @@
#define CONNECTION_FAILED 1
#define CONNECTION_TIMEOUT 2
+#define UDP_SCAN_TIMEOUT 3 /* Seconds */
+
/* Command Line Options */
int Cflag = 0; /* CRLF line-ending */
int dflag; /* detached, no stdin */
@@ -497,7 +499,7 @@ main(int argc, char *argv[])
continue;
ret = 0;
- if (vflag || zflag) {
+ if (vflag) {
/* For UDP, make sure we are connected. */
if (uflag) {
if (udptest(s) == -1) {
@@ -1057,15 +1059,20 @@ build_ports(char *p)
int
udptest(int s)
{
- int i, ret;
-
- for (i = 0; i <= 3; i++) {
- if (write(s, "X", 1) == 1)
- ret = 1;
- else
- ret = -1;
+ int i, t;
+
+ if ((write(s, "X", 1) != 1) ||
+ ((write(s, "X", 1) != 1) && (errno == ECONNREFUSED)))
+ return -1;
+
+ /* Give the remote host some time to reply. */
+ for (i = 0, t = (timeout == -1) ? UDP_SCAN_TIMEOUT : (timeout / 1000);
+ i < t; i++) {
+ sleep(1);
+ if ((write(s, "X", 1) != 1) && (errno == ECONNREFUSED))
+ return -1;
}
- return (ret);
+ return 1;
}
void
--

106
network/netcat-openbsd/patches/0008-verbose-numeric-port.patch Normal file
View File

@ -0,0 +1,106 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:38:15 +0800
Subject: verbose numeric port
---
netcat.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++----
1 file changed, 55 insertions(+), 4 deletions(-)
diff --git a/netcat.c b/netcat.c
index baab909..eb3453e 100644
--- a/netcat.c
+++ b/netcat.c
@@ -41,6 +41,7 @@
#include <netinet/tcp.h>
#include <netinet/ip.h>
#include <arpa/telnet.h>
+#include <arpa/inet.h>
#ifndef IPTOS_LOWDELAY
# define IPTOS_LOWDELAY 0x10
@@ -424,6 +425,18 @@ main(int argc, char *argv[])
s = local_listen(host, uport, hints);
if (s < 0)
err(1, NULL);
+
+ char* local;
+ if (family == AF_INET6
+ local = "0.0.0.0";
+ else if (family == AF_INET)
+ local = ":::";
+ else
+ local = "unknown"
+ fprintf(stderr, "Listening on [%s] (family %d, port %d)\n",
+ host ?: local,
+ family,
+ *uport);
/*
* For UDP, we will use recvfrom() initially
* to wait for a caller, then use the regular
@@ -432,16 +445,15 @@ main(int argc, char *argv[])
if (uflag) {
int rv, plen;
char buf[16384];
- struct sockaddr_storage z;
- len = sizeof(z);
+ len = sizeof(cliaddr);
plen = jflag ? 16384 : 2048;
rv = recvfrom(s, buf, plen, MSG_PEEK,
- (struct sockaddr *)&z, &len);
+ (struct sockaddr *)&cliaddr, &len);
if (rv < 0)
err(1, "recvfrom");
- rv = connect(s, (struct sockaddr *)&z, len);
+ rv = connect(s, (struct sockaddr *)&cliaddr, len);
if (rv < 0)
err(1, "connect");
@@ -450,6 +462,45 @@ main(int argc, char *argv[])
len = sizeof(cliaddr);
connfd = accept(s, (struct sockaddr *)&cliaddr,
&len);
+ if(vflag) {
+ /* Don't look up port if -n. */
+ if (nflag)
+ sv = NULL;
+ else
+ sv = getservbyport(ntohs(atoi(uport)),
+ uflag ? "udp" : "tcp");
+
+ if (((struct sockaddr *)&cliaddr)->sa_family == AF_INET) {
+ char dst[INET_ADDRSTRLEN];
+ inet_ntop(((struct sockaddr *)&cliaddr)->sa_family,&(((struct sockaddr_in *)&cliaddr)->sin_addr),dst,INET_ADDRSTRLEN);
+ fprintf(stderr, "Connection from [%s] port %s [%s/%s] accepted (family %d, sport %d)\n",
+ dst,
+ uport,
+ uflag ? "udp" : "tcp",
+ sv ? sv->s_name : "*",
+ ((struct sockaddr *)(&cliaddr))->sa_family,
+ ntohs(((struct sockaddr_in *)&cliaddr)->sin_port));
+ }
+ else if(((struct sockaddr *)&cliaddr)->sa_family == AF_INET6) {
+ char dst[INET6_ADDRSTRLEN];
+ inet_ntop(((struct sockaddr *)&cliaddr)->sa_family,&(((struct sockaddr_in6 *)&cliaddr)->sin6_addr),dst,INET6_ADDRSTRLEN);
+ fprintf(stderr, "Connection from [%s] port %s [%s/%s] accepted (family %d, sport %d)\n",
+ dst,
+ uport,
+ uflag ? "udp" : "tcp",
+ sv ? sv->s_name : "*",
+ ((struct sockaddr *)&cliaddr)->sa_family,
+ ntohs(((struct sockaddr_in6 *)&cliaddr)->sin6_port));
+ }
+ else {
+ fprintf(stderr, "Connection from unknown port %s [%s/%s] accepted (family %d, sport %d)\n",
+ uport,
+ uflag ? "udp" : "tcp",
+ sv ? sv->s_name : "*",
+ ((struct sockaddr *)(&cliaddr))->sa_family,
+ ntohs(((struct sockaddr_in *)&cliaddr)->sin_port));
+ }
+ }
readwrite(connfd);
close(connfd);
}
--

304
network/netcat-openbsd/patches/0009-dccp-support.patch Normal file
View File

@ -0,0 +1,304 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 15:56:51 +0800
Subject: dccp support
---
nc.1 | 4 ++-
netcat.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++------------
2 files changed, 93 insertions(+), 22 deletions(-)
diff --git a/nc.1 b/nc.1
index 0d92b74..60e3668 100644
--- a/nc.1
+++ b/nc.1
@@ -34,7 +34,7 @@
.Sh SYNOPSIS
.Nm nc
.Bk -words
-.Op Fl 46CDdhklnrStUuvz
+.Op Fl 46CDdhklnrStUuvZz
.Op Fl I Ar length
.Op Fl i Ar interval
.Op Fl O Ar length
@@ -257,6 +257,8 @@ If
.Ar port
is not specified, the well-known port for the proxy protocol is used (1080
for SOCKS, 3128 for HTTPS).
+.It Fl Z
+DCCP mode.
.It Fl z
Specifies that
.Nm
diff --git a/netcat.c b/netcat.c
index eb3453e..56cc15e 100644
--- a/netcat.c
+++ b/netcat.c
@@ -129,6 +129,7 @@ int rflag; /* Random ports flag */
char *sflag; /* Source Address */
int tflag; /* Telnet Emulation */
int uflag; /* UDP - Default to TCP */
+int dccpflag; /* DCCP - Default to TCP */
int vflag; /* Verbosity */
int xflag; /* Socks proxy */
int zflag; /* Port Scan Flag */
@@ -160,6 +161,7 @@ int unix_listen(char *);
void set_common_sockopts(int);
int map_tos(char *, int *);
void usage(int);
+char *proto_name(int uflag, int dccpflag);
static int connect_with_timeout(int fd, const struct sockaddr *sa,
socklen_t salen, int ctimeout);
@@ -187,7 +189,7 @@ main(int argc, char *argv[])
sv = NULL;
while ((ch = getopt(argc, argv,
- "46CDdhI:i:jklnO:P:p:q:rSs:tT:UuV:vw:X:x:z")) != -1) {
+ "46CDdhI:i:jklnO:P:p:q:rSs:tT:UuV:vw:X:x:Zz")) != -1) {
switch (ch) {
case '4':
family = AF_INET;
@@ -258,6 +260,13 @@ main(int argc, char *argv[])
case 'u':
uflag = 1;
break;
+ case 'Z':
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+ dccpflag = 1;
+# else
+ errx(1, "no DCCP support available");
+# endif
+ break;
case 'V':
# if defined(RT_TABLEID_MAX)
rtableid = (unsigned int)strtonum(optarg, 0,
@@ -333,6 +342,12 @@ main(int argc, char *argv[])
/* Cruft to make sure options are clean, and used properly. */
if (argv[0] && !argv[1] && family == AF_UNIX) {
+ if (uflag)
+ errx(1, "cannot use -u and -U");
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+ if (dccpflag)
+ errx(1, "cannot use -Z and -U");
+# endif
host = argv[0];
uport = NULL;
} else if (!argv[0] && lflag) {
@@ -374,8 +389,20 @@ main(int argc, char *argv[])
if (family != AF_UNIX) {
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = family;
- hints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
- hints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
+ if (uflag) {
+ hints.ai_socktype = SOCK_DGRAM;
+ hints.ai_protocol = IPPROTO_UDP;
+ }
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+ else if (dccpflag) {
+ hints.ai_socktype = SOCK_DCCP;
+ hints.ai_protocol = IPPROTO_DCCP;
+ }
+# endif
+ else {
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = IPPROTO_TCP;
+ }
if (nflag)
hints.ai_flags |= AI_NUMERICHOST;
}
@@ -383,7 +410,10 @@ main(int argc, char *argv[])
if (xflag) {
if (uflag)
errx(1, "no proxy support for UDP mode");
-
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+ if (dccpflag)
+ errx(1, "no proxy support for DCCP mode");
+# endif
if (lflag)
errx(1, "no proxy support for listen");
@@ -427,12 +457,12 @@ main(int argc, char *argv[])
err(1, NULL);
char* local;
- if (family == AF_INET6
+ if (family == AF_INET6 )
local = "0.0.0.0";
else if (family == AF_INET)
local = ":::";
else
- local = "unknown"
+ local = "unknown";
fprintf(stderr, "Listening on [%s] (family %d, port %d)\n",
host ?: local,
family,
@@ -463,12 +493,13 @@ main(int argc, char *argv[])
connfd = accept(s, (struct sockaddr *)&cliaddr,
&len);
if(vflag) {
+ char *proto = proto_name(uflag, dccpflag);
/* Don't look up port if -n. */
if (nflag)
sv = NULL;
else
sv = getservbyport(ntohs(atoi(uport)),
- uflag ? "udp" : "tcp");
+ proto);
if (((struct sockaddr *)&cliaddr)->sa_family == AF_INET) {
char dst[INET_ADDRSTRLEN];
@@ -476,7 +507,7 @@ main(int argc, char *argv[])
fprintf(stderr, "Connection from [%s] port %s [%s/%s] accepted (family %d, sport %d)\n",
dst,
uport,
- uflag ? "udp" : "tcp",
+ proto,
sv ? sv->s_name : "*",
((struct sockaddr *)(&cliaddr))->sa_family,
ntohs(((struct sockaddr_in *)&cliaddr)->sin_port));
@@ -487,7 +518,7 @@ main(int argc, char *argv[])
fprintf(stderr, "Connection from [%s] port %s [%s/%s] accepted (family %d, sport %d)\n",
dst,
uport,
- uflag ? "udp" : "tcp",
+ proto,
sv ? sv->s_name : "*",
((struct sockaddr *)&cliaddr)->sa_family,
ntohs(((struct sockaddr_in6 *)&cliaddr)->sin6_port));
@@ -495,7 +526,7 @@ main(int argc, char *argv[])
else {
fprintf(stderr, "Connection from unknown port %s [%s/%s] accepted (family %d, sport %d)\n",
uport,
- uflag ? "udp" : "tcp",
+ proto,
sv ? sv->s_name : "*",
((struct sockaddr *)(&cliaddr))->sa_family,
ntohs(((struct sockaddr_in *)&cliaddr)->sin_port));
@@ -559,19 +590,20 @@ main(int argc, char *argv[])
}
}
+ char *proto = proto_name(uflag, dccpflag);
/* Don't look up port if -n. */
if (nflag)
sv = NULL;
else {
sv = getservbyport(
ntohs(atoi(portlist[i])),
- uflag ? "udp" : "tcp");
+ proto);
}
fprintf(stderr,
"Connection to %s %s port [%s/%s] "
"succeeded!\n", host, portlist[i],
- uflag ? "udp" : "tcp",
+ proto,
sv ? sv->s_name : "*");
}
if (!zflag)
@@ -671,6 +703,24 @@ unix_listen(char *path)
return (s);
}
+char *proto_name(uflag, dccpflag) {
+
+ char *proto = NULL;
+ if (uflag) {
+ proto = "udp";
+ }
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+ else if (dccpflag) {
+ proto = "dccp";
+ }
+# endif
+ else {
+ proto = "tcp";
+ }
+
+ return proto;
+}
+
/*
* remote_connect()
* Returns a socket connected to a remote host. Properly binds to a local
@@ -709,8 +759,21 @@ remote_connect(const char *host, const char *port, struct addrinfo hints)
# endif
memset(&ahints, 0, sizeof(struct addrinfo));
ahints.ai_family = res0->ai_family;
- ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
- ahints.ai_protocol = uflag ? IPPROTO_UDP : IPPROTO_TCP;
+ if (uflag) {
+ ahints.ai_socktype = SOCK_DGRAM;
+ ahints.ai_protocol = IPPROTO_UDP;
+
+ }
+# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
+ else if (dccpflag) {
+ hints.ai_socktype = SOCK_DCCP;
+ hints.ai_protocol = IPPROTO_DCCP;
+ }
+# endif
+ else {
+ ahints.ai_socktype = SOCK_STREAM;
+ ahints.ai_protocol = IPPROTO_TCP;
+ }
ahints.ai_flags = AI_PASSIVE;
if ((error = getaddrinfo(sflag, pflag, &ahints, &ares)))
errx(1, "getaddrinfo: %s", gai_strerror(error));
@@ -722,15 +785,19 @@ remote_connect(const char *host, const char *port, struct addrinfo hints)
}
set_common_sockopts(s);
+ char *proto = proto_name(uflag, dccpflag);
- if ((error = connect_with_timeout(s, res0->ai_addr, res0->ai_addrlen, timeout))== CONNECTION_SUCCESS)
+ if ((error = connect_with_timeout(s, res0->ai_addr, res0->ai_addrlen, timeout))== CONNECTION_SUCCESS) {
break;
- else if (vflag && error == CONNECTION_FAILED)
+ }
+ else if (vflag && error == CONNECTION_FAILED) {
warn("connect to %s port %s (%s) failed", host, port,
- uflag ? "udp" : "tcp");
- else if (vflag && error == CONNECTION_TIMEOUT)
+ proto);
+ }
+ else if (vflag && error == CONNECTION_TIMEOUT) {
warn("connect to %s port %s (%s) timed out", host, port,
- uflag ? "udp" : "tcp");
+ proto);
+ }
close(s);
s = -1;
@@ -1047,7 +1114,8 @@ build_ports(char *p)
int hi, lo, cp;
int x = 0;
- sv = getservbyname(p, uflag ? "udp" : "tcp");
+ char *proto = proto_name(uflag, dccpflag);
+ sv = getservbyname(p, proto);
if (sv) {
portlist[0] = calloc(1, PORT_MAX_LEN);
if (portlist[0] == NULL)
@@ -1252,6 +1320,7 @@ help(void)
\t-w secs\t Timeout for connects and final net reads\n\
\t-X proto Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
\t-x addr[:port]\tSpecify proxy address and port\n\
+ \t-Z DCCP mode\n\
\t-z Zero-I/O mode [used for scanning]\n\
Port numbers can be individual or ranges: lo-hi [inclusive]\n");
exit(0);
@@ -1261,7 +1330,7 @@ void
usage(int ret)
{
fprintf(stderr,
- "usage: nc [-46CDdhjklnrStUuvz] [-I length] [-i interval] [-O length]\n"
+ "usage: nc [-46CDdhjklnrStUuvZz] [-I length] [-i interval] [-O length]\n"
"\t [-P proxy_username] [-p source_port] [-q seconds] [-s source]\n"
"\t [-T toskeyword] [-V rtable] [-w timeout] [-X proxy_protocol]\n"
"\t [-x proxy_address[:port]] [destination] [port]\n");
--

75
network/netcat-openbsd/patches/0010-serialized-handling-multiple-clients.patch Normal file
View File

@ -0,0 +1,75 @@
From: Aron Xu <aron@debian.org>
Date: Tue, 14 Feb 2012 23:02:00 +0800
Subject: serialized handling multiple clients
---
netcat.c | 39 +++++++++++++++++++--------------------
1 file changed, 19 insertions(+), 20 deletions(-)
diff --git a/netcat.c b/netcat.c
index 56cc15e..bf9940f 100644
--- a/netcat.c
+++ b/netcat.c
@@ -447,26 +447,24 @@ main(int argc, char *argv[])
s = unix_bind(host);
else
s = unix_listen(host);
- }
+ } else
+ s = local_listen(host, uport, hints);
+ if (s < 0)
+ err(1, NULL);
+
+ char* local;
+ if (family == AF_INET6)
+ local = ":::";
+ else
+ local = "0.0.0.0";
+ fprintf(stderr, "Listening on [%s] (family %d, port %d)\n",
+ host ?: local,
+ family,
+ *uport);
/* Allow only one connection at a time, but stay alive. */
for (;;) {
- if (family != AF_UNIX)
- s = local_listen(host, uport, hints);
- if (s < 0)
- err(1, NULL);
- char* local;
- if (family == AF_INET6 )
- local = "0.0.0.0";
- else if (family == AF_INET)
- local = ":::";
- else
- local = "unknown";
- fprintf(stderr, "Listening on [%s] (family %d, port %d)\n",
- host ?: local,
- family,
- *uport);
/*
* For UDP, we will use recvfrom() initially
* to wait for a caller, then use the regular
@@ -536,15 +534,16 @@ main(int argc, char *argv[])
close(connfd);
}
- if (family != AF_UNIX)
+ if (kflag)
+ continue;
+ if (family != AF_UNIX) {
close(s);
+ }
else if (uflag) {
if (connect(s, NULL, 0) < 0)
err(1, "connect");
}
-
- if (!kflag)
- break;
+ break;
}
} else if (family == AF_UNIX) {
ret = 0;
--

457
network/netcat-openbsd/patches/0011-misc-failures-and-features.patch Normal file
View File

@ -0,0 +1,457 @@
From: Aron Xu <aron@debian.org>
Date: Mon, 13 Feb 2012 19:06:52 +0800
Subject: misc connection failures
---
nc.1 | 76 ++++++++++++++++++++++++++++++++++++---
netcat.c | 119 ++++++++++++++++++++++++++++++++++++++++++--------------------
2 files changed, 153 insertions(+), 42 deletions(-)
diff --git a/nc.1 b/nc.1
index 60e3668..477cb1b 100644
--- a/nc.1
+++ b/nc.1
@@ -34,7 +34,7 @@
.Sh SYNOPSIS
.Nm nc
.Bk -words
-.Op Fl 46CDdhklnrStUuvZz
+.Op Fl 46bCDdhklnrStUuvZz
.Op Fl I Ar length
.Op Fl i Ar interval
.Op Fl O Ar length
@@ -99,6 +99,8 @@ to use IPv4 addresses only.
Forces
.Nm
to use IPv6 addresses only.
+.It Fl b
+Allow broadcast.
.It Fl C
Send CRLF as line-ending.
.It Fl D
@@ -323,6 +325,54 @@ and which side is being used as a
The connection may be terminated using an
.Dv EOF
.Pq Sq ^D .
+.Pp
+There is no
+.Fl c
+or
+.Fl e
+option in this netcat, but you still can execute a command after connection
+being established by redirecting file descriptors. Be cautious here because
+opening a port and let anyone connected execute arbitrary command on your
+site is DANGEROUS. If you really need to do this, here is an example:
+.Pp
+On
+.Sq server
+side:
+.Pp
+.Dl $ rm -f /tmp/f; mkfifo /tmp/f
+.Dl $ cat /tmp/f | /bin/sh -i 2>&1 | nc -l 127.0.0.1 1234 > /tmp/f
+.Pp
+On
+.Sq client
+side:
+.Pp
+.Dl $ nc host.example.com 1234
+.Dl $ (shell prompt from host.example.com)
+.Pp
+By doing this, you create a fifo at /tmp/f and make nc listen at port 1234
+of address 127.0.0.1 on
+.Sq server
+side, when a
+.Sq client
+establishes a connection successfully to that port, /bin/sh gets executed
+on
+.Sq server
+side and the shell prompt is given to
+.Sq client
+side.
+.Pp
+When connection is terminated,
+.Nm
+quits as well. Use
+.Fl k
+if you want it keep listening, but if the command quits this option won't
+restart it or keep
+.Nm
+running. Also don't forget to remove the file descriptor once you don't need
+it anymore:
+.Pp
+.Dl $ rm -f /tmp/f
+.Pp
.Sh DATA TRANSFER
The example in the previous section can be expanded to build a
basic data transfer model.
@@ -382,15 +432,30 @@ The
flag can be used to tell
.Nm
to report open ports,
-rather than initiate a connection.
+rather than initiate a connection. Usually it's useful to turn on verbose
+output to stderr by use this option in conjunction with
+.Fl v
+option.
+.Pp
For example:
.Bd -literal -offset indent
-$ nc -z host.example.com 20-30
+$ nc \-zv host.example.com 20-30
Connection to host.example.com 22 port [tcp/ssh] succeeded!
Connection to host.example.com 25 port [tcp/smtp] succeeded!
.Ed
.Pp
-The port range was specified to limit the search to ports 20 \- 30.
+The port range was specified to limit the search to ports 20 \- 30, and is
+scanned by increasing order.
+.Pp
+You can also specify a list of ports to scan, for example:
+.Bd -literal -offset indent
+$ nc \-zv host.example.com 80 20 22
+nc: connect to host.example.com 80 (tcp) failed: Connection refused
+nc: connect to host.example.com 20 (tcp) failed: Connection refused
+Connection to host.example.com port [tcp/ssh] succeeded!
+.Ed
+.Pp
+The ports are scanned by the order you given.
.Pp
Alternatively, it might be useful to know which server software
is running, and which versions.
@@ -455,6 +520,9 @@ Original implementation by *Hobbit*
.br
Rewritten with IPv6 support by
.An Eric Jackson Aq ericj@monkey.org .
+.br
+Modified for Debian port by Aron Xu
+.Aq aron@debian.org .
.Sh CAVEATS
UDP port scans using the
.Fl uz
diff --git a/netcat.c b/netcat.c
index bf9940f..c938d11 100644
--- a/netcat.c
+++ b/netcat.c
@@ -88,6 +88,7 @@
#include <netdb.h>
#include <poll.h>
#include <signal.h>
+#include <stddef.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
@@ -115,6 +116,7 @@
#define UDP_SCAN_TIMEOUT 3 /* Seconds */
/* Command Line Options */
+int bflag; /* Allow Broadcast */
int Cflag = 0; /* CRLF line-ending */
int dflag; /* detached, no stdin */
unsigned int iflag; /* Interval Flag */
@@ -146,7 +148,7 @@ char *portlist[PORT_MAX+1];
char *unix_dg_tmp_socket;
void atelnet(int, unsigned char *, unsigned int);
-void build_ports(char *);
+void build_ports(char **);
void help(void);
int local_listen(char *, char *, struct addrinfo);
void readwrite(int);
@@ -171,11 +173,14 @@ int
main(int argc, char *argv[])
{
int ch, s, ret, socksv;
- char *host, *uport;
+ char *host, **uport;
struct addrinfo hints;
struct servent *sv;
socklen_t len;
- struct sockaddr_storage cliaddr;
+ union {
+ struct sockaddr_storage storage;
+ struct sockaddr_un forunix;
+ } cliaddr;
char *proxy = NULL;
const char *errstr, *proxyhost = "", *proxyport = NULL;
struct addrinfo proxyhints;
@@ -189,7 +194,7 @@ main(int argc, char *argv[])
sv = NULL;
while ((ch = getopt(argc, argv,
- "46CDdhI:i:jklnO:P:p:q:rSs:tT:UuV:vw:X:x:Zz")) != -1) {
+ "46bCDdhI:i:jklnO:P:p:q:rSs:tT:UuV:vw:X:x:Zz")) != -1) {
switch (ch) {
case '4':
family = AF_INET;
@@ -197,6 +202,13 @@ main(int argc, char *argv[])
case '6':
family = AF_INET6;
break;
+ case 'b':
+# if defined(SO_BROADCAST)
+ bflag = 1;
+# else
+ errx(1, "no broadcast frame support available");
+# endif
+ break;
case 'U':
family = AF_UNIX;
break;
@@ -342,35 +354,40 @@ main(int argc, char *argv[])
/* Cruft to make sure options are clean, and used properly. */
if (argv[0] && !argv[1] && family == AF_UNIX) {
- if (uflag)
- errx(1, "cannot use -u and -U");
# if defined(IPPROTO_DCCP) && defined(SOCK_DCCP)
if (dccpflag)
errx(1, "cannot use -Z and -U");
# endif
host = argv[0];
uport = NULL;
- } else if (!argv[0] && lflag) {
- if (sflag)
- errx(1, "cannot use -s and -l");
- if (zflag)
- errx(1, "cannot use -z and -l");
- if (pflag)
- uport=pflag;
- } else if (!lflag && kflag) {
- errx(1, "cannot use -k without -l");
- } else if (argv[0] && !argv[1]) {
- if (!lflag)
- usage(1);
- uport = argv[0];
+ } else if (argv[0] && !argv[1] && lflag) {
+ if (pflag) {
+ uport = &pflag;
+ host = argv[0];
+ } else {
+ uport = argv;
+ host = NULL;
+ }
+ } else if (!argv[0] && lflag && pflag) {
+ uport = &pflag;
host = NULL;
} else if (argv[0] && argv[1]) {
host = argv[0];
- uport = argv[1];
+ uport = &argv[1];
} else
usage(1);
-
+ if (lflag) {
+ if (sflag)
+ errx(1, "cannot use -s and -l");
+ if (zflag)
+ errx(1, "cannot use -z and -l");
+ if (pflag)
+ /* This still does not work well because of getopt mess
+ errx(1, "cannot use -p and -l"); */
+ uport = &pflag;
+ } else if (!lflag && kflag)
+ errx(1, "cannot use -k without -l");
/* Get name of temporary socket for unix datagram client */
if ((family == AF_UNIX) && uflag && !lflag) {
@@ -448,7 +465,7 @@ main(int argc, char *argv[])
else
s = unix_listen(host);
} else
- s = local_listen(host, uport, hints);
+ s = local_listen(host, *uport, hints);
if (s < 0)
err(1, NULL);
@@ -457,7 +474,8 @@ main(int argc, char *argv[])
local = ":::";
else
local = "0.0.0.0";
- fprintf(stderr, "Listening on [%s] (family %d, port %d)\n",
+ if (vflag && (family != AF_UNIX))
+ fprintf(stderr, "Listening on [%s] (family %d, port %s)\n",
host ?: local,
family,
*uport);
@@ -490,13 +508,17 @@ main(int argc, char *argv[])
len = sizeof(cliaddr);
connfd = accept(s, (struct sockaddr *)&cliaddr,
&len);
- if(vflag) {
+ if(vflag && family == AF_UNIX) {
+ fprintf(stderr, "Connection from \"%.*s\" accepted\n",
+ (len - (int)offsetof(struct sockaddr_un, sun_path)),
+ ((struct sockaddr_un*)&cliaddr)->sun_path);
+ } else if(vflag) {
char *proto = proto_name(uflag, dccpflag);
/* Don't look up port if -n. */
if (nflag)
sv = NULL;
else
- sv = getservbyport(ntohs(atoi(uport)),
+ sv = getservbyport(ntohs(atoi(*uport)),
proto);
if (((struct sockaddr *)&cliaddr)->sa_family == AF_INET) {
@@ -504,7 +526,7 @@ main(int argc, char *argv[])
inet_ntop(((struct sockaddr *)&cliaddr)->sa_family,&(((struct sockaddr_in *)&cliaddr)->sin_addr),dst,INET_ADDRSTRLEN);
fprintf(stderr, "Connection from [%s] port %s [%s/%s] accepted (family %d, sport %d)\n",
dst,
- uport,
+ *uport,
proto,
sv ? sv->s_name : "*",
((struct sockaddr *)(&cliaddr))->sa_family,
@@ -515,7 +537,7 @@ main(int argc, char *argv[])
inet_ntop(((struct sockaddr *)&cliaddr)->sa_family,&(((struct sockaddr_in6 *)&cliaddr)->sin6_addr),dst,INET6_ADDRSTRLEN);
fprintf(stderr, "Connection from [%s] port %s [%s/%s] accepted (family %d, sport %d)\n",
dst,
- uport,
+ *uport,
proto,
sv ? sv->s_name : "*",
((struct sockaddr *)&cliaddr)->sa_family,
@@ -523,17 +545,21 @@ main(int argc, char *argv[])
}
else {
fprintf(stderr, "Connection from unknown port %s [%s/%s] accepted (family %d, sport %d)\n",
- uport,
+ *uport,
proto,
sv ? sv->s_name : "*",
((struct sockaddr *)(&cliaddr))->sa_family,
ntohs(((struct sockaddr_in *)&cliaddr)->sin_port));
}
}
+ if(!kflag)
+ close(s);
readwrite(connfd);
close(connfd);
}
+ if (vflag && kflag)
+ fprintf(stderr, "Connection closed, listening again.\n");
if (kflag)
continue;
if (family != AF_UNIX) {
@@ -641,6 +667,8 @@ unix_bind(char *path)
return (-1);
}
+ unlink(path);
+
if (bind(s, (struct sockaddr *)&sun, SUN_LEN(&sun)) < 0) {
close(s);
return (-1);
@@ -662,8 +690,10 @@ unix_connect(char *path)
if ((s = unix_bind(unix_dg_tmp_socket)) < 0)
return (-1);
} else {
- if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
+ if ((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+ errx(1,"create unix socket failed");
return (-1);
+ }
}
(void)fcntl(s, F_SETFD, 1);
@@ -674,9 +704,11 @@ unix_connect(char *path)
sizeof(sun.sun_path)) {
close(s);
errno = ENAMETOOLONG;
+ warn("unix connect abandoned");
return (-1);
}
if (connect(s, (struct sockaddr *)&sun, SUN_LEN(&sun)) < 0) {
+ warn("unix connect failed");
close(s);
return (-1);
}
@@ -1105,22 +1137,23 @@ atelnet(int nfd, unsigned char *buf, unsigned int size)
* that we should try to connect to.
*/
void
-build_ports(char *p)
+build_ports(char **p)
{
struct servent *sv;
const char *errstr;
char *n;
int hi, lo, cp;
int x = 0;
+ int i;
char *proto = proto_name(uflag, dccpflag);
- sv = getservbyname(p, proto);
+ sv = getservbyname(*p, proto);
if (sv) {
portlist[0] = calloc(1, PORT_MAX_LEN);
if (portlist[0] == NULL)
err(1, NULL);
snprintf(portlist[0], PORT_MAX_LEN, "%d", ntohs(sv->s_port));
- } else if ((n = strchr(p, '-')) != NULL) {
+ } else if ((n = strchr(*p, '-')) != NULL) {
*n = '\0';
n++;
@@ -1128,9 +1161,9 @@ build_ports(char *p)
hi = strtonum(n, 1, PORT_MAX, &errstr);
if (errstr)
errx(1, "port number %s: %s", errstr, n);
- lo = strtonum(p, 1, PORT_MAX, &errstr);
+ lo = strtonum(*p, 1, PORT_MAX, &errstr);
if (errstr)
- errx(1, "port number %s: %s", errstr, p);
+ errx(1, "port number %s: %s", errstr, *p);
if (lo > hi) {
cp = hi;
@@ -1160,10 +1193,12 @@ build_ports(char *p)
}
}
} else {
- hi = strtonum(p, 1, PORT_MAX, &errstr);
+ hi = strtonum(*p, 1, PORT_MAX, &errstr);
if (errstr)
- errx(1, "port number %s: %s", errstr, p);
- portlist[0] = strdup(p);
+ errx(1, "port number %s: %s", errstr, *p);
+ for (i=0;p[i];i++) {
+ portlist[i] = strdup(p[i]);
+ }
if (portlist[0] == NULL)
err(1, NULL);
}
@@ -1198,6 +1233,13 @@ set_common_sockopts(int s)
{
int x = 1;
+# if defined(SO_BROADCAST)
+ if (bflag) {
+ if (setsockopt(s, IPPROTO_TCP, SO_BROADCAST,
+ &x, sizeof(x)) == -1)
+ err(1, NULL);
+ }
+# endif
# if defined(TCP_MD5SIG)
if (Sflag) {
if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
@@ -1293,6 +1335,7 @@ help(void)
fprintf(stderr, "\tCommand Summary:\n\
\t-4 Use IPv4\n\
\t-6 Use IPv6\n\
+ \t-b Allow broadcast\n\
\t-C Send CRLF as line-ending\n\
\t-D Enable the debug socket option\n\
\t-d Detach from stdin\n\
@@ -1329,7 +1372,7 @@ void
usage(int ret)
{
fprintf(stderr,
- "usage: nc [-46CDdhjklnrStUuvZz] [-I length] [-i interval] [-O length]\n"
+ "usage: nc [-46bCDdhjklnrStUuvZz] [-I length] [-i interval] [-O length]\n"
"\t [-P proxy_username] [-p source_port] [-q seconds] [-s source]\n"
"\t [-T toskeyword] [-V rtable] [-w timeout] [-X proxy_protocol]\n"
"\t [-x proxy_address[:port]] [destination] [port]\n");
--

6
network/netcat-openbsd/slack-desc
View File

@ -11,9 +11,9 @@ netcat-openbsd:
netcat-openbsd: This package contains the OpenBSD rewrite of netcat,
netcat-openbsd: including support for IPv6, proxies, and Unix sockets.
netcat-openbsd:
netcat-openbsd: Before installing this, be sure to remove the nc package
netcat-openbsd: that comes with Slackware.
netcat-openbsd:
netcat-openbsd: http://packages.debian.org/sid/netcat-openbsd
netcat-openbsd:
netcat-openbsd:
netcat-openbsd:
netcat-openbsd:
netcat-openbsd: