Import nc from OpenBSD's OPENBSD_4_8 as of today.
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Xin LI
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12
nc.1
12
nc.1
@ -1,4 +1,4 @@
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.\" $OpenBSD: nc.1,v 1.53 2010/02/23 23:00:52 schwarze Exp $
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.\" $OpenBSD: nc.1,v 1.55 2010/07/25 07:51:39 guenther Exp $
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.\"
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.\" Copyright (c) 1996 David Sacerdote
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.\" All rights reserved.
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@ -25,7 +25,7 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd $Mdocdate: February 23 2010 $
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.Dd $Mdocdate: July 3 2010 $
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.Dt NC 1
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.Os
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.Sh NAME
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@ -42,7 +42,7 @@
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.Op Fl p Ar source_port
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.Op Fl s Ar source_ip_address
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.Op Fl T Ar ToS
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.Op Fl V Ar rdomain
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.Op Fl V Ar rtable
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.Op Fl w Ar timeout
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.Op Fl X Ar proxy_protocol
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.Oo Xo
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@ -179,8 +179,8 @@ Specifies to use
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sockets.
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.It Fl u
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Use UDP instead of the default option of TCP.
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.It Fl V Ar rdomain
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Set the routing domain.
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.It Fl V Ar rtable
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Set the routing table to be used.
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The default is 0.
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.It Fl v
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Have
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@ -317,7 +317,7 @@ when it might be necessary to verify what data a server is sending
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in response to commands issued by the client.
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For example, to retrieve the home page of a web site:
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.Bd -literal -offset indent
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$ echo -n "GET / HTTP/1.0\er\en\er\en" | nc host.example.com 80
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$ printf "GET / HTTP/1.0\er\en\er\en" | nc host.example.com 80
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.Ed
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.Pp
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Note that this also displays the headers sent by the web server.
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39
netcat.c
39
netcat.c
@ -1,4 +1,4 @@
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/* $OpenBSD: netcat.c,v 1.95 2010/02/27 00:58:56 nicm Exp $ */
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/* $OpenBSD: netcat.c,v 1.98 2010/07/03 04:44:51 guenther Exp $ */
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/*
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* Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
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*
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@ -84,7 +84,7 @@ int Iflag; /* TCP receive buffer size */
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int Oflag; /* TCP send buffer size */
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int Sflag; /* TCP MD5 signature option */
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int Tflag = -1; /* IP Type of Service */
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u_int rdomain;
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u_int rtableid;
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int timeout = -1;
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int family = AF_UNSPEC;
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@ -189,10 +189,10 @@ main(int argc, char *argv[])
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uflag = 1;
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break;
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case 'V':
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rdomain = (unsigned int)strtonum(optarg, 0,
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rtableid = (unsigned int)strtonum(optarg, 0,
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RT_TABLEID_MAX, &errstr);
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if (errstr)
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errx(1, "rdomain %s: %s", errstr, optarg);
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errx(1, "rtable %s: %s", errstr, optarg);
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break;
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case 'v':
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vflag = 1;
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@ -323,11 +323,11 @@ main(int argc, char *argv[])
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*/
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if (uflag) {
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int rv, plen;
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char buf[8192];
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char buf[16384];
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struct sockaddr_storage z;
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len = sizeof(z);
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plen = jflag ? 8192 : 1024;
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plen = jflag ? 16384 : 2048;
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rv = recvfrom(s, buf, plen, MSG_PEEK,
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(struct sockaddr *)&z, &len);
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if (rv < 0)
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@ -507,10 +507,10 @@ remote_connect(const char *host, const char *port, struct addrinfo hints)
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res0->ai_protocol)) < 0)
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continue;
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if (rdomain) {
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if (setsockopt(s, IPPROTO_IP, SO_RDOMAIN, &rdomain,
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sizeof(rdomain)) == -1)
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err(1, "setsockopt SO_RDOMAIN");
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if (rtableid) {
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if (setsockopt(s, IPPROTO_IP, SO_RTABLE, &rtableid,
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sizeof(rtableid)) == -1)
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err(1, "setsockopt SO_RTABLE");
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}
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/* Bind to a local port or source address if specified. */
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@ -581,10 +581,10 @@ local_listen(char *host, char *port, struct addrinfo hints)
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res0->ai_protocol)) < 0)
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continue;
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if (rdomain) {
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if (setsockopt(s, IPPROTO_IP, SO_RDOMAIN, &rdomain,
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sizeof(rdomain)) == -1)
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err(1, "setsockopt SO_RDOMAIN");
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if (rtableid) {
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if (setsockopt(s, IPPROTO_IP, SO_RTABLE, &rtableid,
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sizeof(rtableid)) == -1)
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err(1, "setsockopt SO_RTABLE");
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}
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ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
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@ -619,12 +619,12 @@ void
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readwrite(int nfd)
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{
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struct pollfd pfd[2];
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unsigned char buf[8192];
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unsigned char buf[16384];
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int n, wfd = fileno(stdin);
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int lfd = fileno(stdout);
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int plen;
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plen = jflag ? 8192 : 1024;
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plen = jflag ? 16384 : 2048;
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/* Setup Network FD */
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pfd[0].fd = nfd;
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@ -766,10 +766,9 @@ build_ports(char *p)
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hi = strtonum(p, 1, PORT_MAX, &errstr);
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if (errstr)
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errx(1, "port number %s: %s", errstr, p);
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portlist[0] = calloc(1, PORT_MAX_LEN);
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portlist[0] = strdup(p);
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if (portlist[0] == NULL)
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err(1, NULL);
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portlist[0] = p;
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}
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}
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@ -872,7 +871,7 @@ help(void)
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\t-t Answer TELNET negotiation\n\
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\t-U Use UNIX domain socket\n\
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\t-u UDP mode\n\
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\t-V rdomain Specify alternate routing domain\n\
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\t-V rtable Specify alternate routing table\n\
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\t-v Verbose\n\
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\t-w secs\t Timeout for connects and final net reads\n\
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\t-X proto Proxy protocol: \"4\", \"5\" (SOCKS) or \"connect\"\n\
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@ -888,7 +887,7 @@ usage(int ret)
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fprintf(stderr,
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"usage: nc [-46DdhklnrStUuvz] [-I length] [-i interval] [-O length]\n"
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"\t [-P proxy_username] [-p source_port] [-s source_ip_address] [-T ToS]\n"
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"\t [-V rdomain] [-w timeout] [-X proxy_protocol]\n"
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"\t [-V rtable] [-w timeout] [-X proxy_protocol]\n"
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"\t [-x proxy_address[:port]] [hostname] [port]\n");
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if (ret)
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exit(1);
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18
socks.c
18
socks.c
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/* $OpenBSD: socks.c,v 1.17 2006/09/25 04:51:20 ray Exp $ */
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/* $OpenBSD: socks.c,v 1.18 2010/04/20 07:26:35 nicm Exp $ */
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/*
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* Copyright (c) 1999 Niklas Hallqvist. All rights reserved.
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@ -167,11 +167,11 @@ socks_connect(const char *host, const char *port,
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buf[2] = SOCKS_NOAUTH;
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cnt = atomicio(vwrite, proxyfd, buf, 3);
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if (cnt != 3)
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err(1, "write failed (%d/3)", cnt);
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err(1, "write failed (%zu/3)", cnt);
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cnt = atomicio(read, proxyfd, buf, 2);
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if (cnt != 2)
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err(1, "read failed (%d/3)", cnt);
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err(1, "read failed (%zu/3)", cnt);
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if (buf[1] == SOCKS_NOMETHOD)
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errx(1, "authentication method negotiation failed");
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@ -220,11 +220,11 @@ socks_connect(const char *host, const char *port,
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cnt = atomicio(vwrite, proxyfd, buf, wlen);
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if (cnt != wlen)
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err(1, "write failed (%d/%d)", cnt, wlen);
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err(1, "write failed (%zu/%zu)", cnt, wlen);
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cnt = atomicio(read, proxyfd, buf, 10);
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if (cnt != 10)
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err(1, "read failed (%d/10)", cnt);
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err(1, "read failed (%zu/10)", cnt);
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if (buf[1] != 0)
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errx(1, "connection failed, SOCKS error %d", buf[1]);
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} else if (socksv == 4) {
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@ -242,11 +242,11 @@ socks_connect(const char *host, const char *port,
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cnt = atomicio(vwrite, proxyfd, buf, wlen);
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if (cnt != wlen)
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err(1, "write failed (%d/%d)", cnt, wlen);
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err(1, "write failed (%zu/%zu)", cnt, wlen);
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cnt = atomicio(read, proxyfd, buf, 8);
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if (cnt != 8)
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err(1, "read failed (%d/8)", cnt);
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err(1, "read failed (%zu/8)", cnt);
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if (buf[1] != 90)
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errx(1, "connection failed, SOCKS error %d", buf[1]);
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} else if (socksv == -1) {
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@ -272,7 +272,7 @@ socks_connect(const char *host, const char *port,
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cnt = atomicio(vwrite, proxyfd, buf, r);
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if (cnt != r)
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err(1, "write failed (%d/%d)", cnt, r);
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err(1, "write failed (%zu/%d)", cnt, r);
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if (authretry > 1) {
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char resp[1024];
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@ -290,7 +290,7 @@ socks_connect(const char *host, const char *port,
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errx(1, "Proxy auth response too long");
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r = strlen(buf);
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if ((cnt = atomicio(vwrite, proxyfd, buf, r)) != r)
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err(1, "write failed (%d/%d)", cnt, r);
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err(1, "write failed (%zu/%d)", cnt, r);
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}
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/* Terminate headers */
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