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authorXin LI <delphij@FreeBSD.org>2006-05-21 15:49:27 +0000
committerXin LI <delphij@FreeBSD.org>2006-05-21 15:49:27 +0000
commit7a997a696beee31dccebe2d1252d6795e63cbadd (patch)
tree243e38414b80cb75b334161d99a0c8e89e6273c1
parent8c384020b3a3b4f90e9e2234d67a9cef69d7cce3 (diff)
downloadsrc-7a997a696beee31dccebe2d1252d6795e63cbadd.tar.gz
src-7a997a696beee31dccebe2d1252d6795e63cbadd.zip
Import netcat from OpenBSD 3.9-RELEASE.vendor/netcat/3.9
Notes
Notes: svn path=/vendor/netcat/dist/; revision=158795 svn path=/vendor/netcat/3.9/; revision=158797; tag=vendor/netcat/3.9
-rw-r--r--contrib/netcat/atomicio.c28
-rw-r--r--contrib/netcat/atomicio.h33
-rw-r--r--contrib/netcat/nc.177
-rw-r--r--contrib/netcat/netcat.c151
-rw-r--r--contrib/netcat/socks.c296
5 files changed, 393 insertions, 192 deletions
diff --git a/contrib/netcat/atomicio.c b/contrib/netcat/atomicio.c
index 9e732904adc3..c3f26846df9d 100644
--- a/contrib/netcat/atomicio.c
+++ b/contrib/netcat/atomicio.c
@@ -1,4 +1,7 @@
+/* $OpenBSD: atomicio.c,v 1.8 2006/02/11 19:31:18 otto Exp $ */
+
/*
+ * Copyright (c) 2005 Anil Madhavapeddy. All rights served.
* Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
* All rights reserved.
*
@@ -25,20 +28,23 @@
#include <sys/types.h>
#include <sys/uio.h>
-
#include <errno.h>
#include <unistd.h>
-
-ssize_t atomicio(ssize_t (*f)(int, void *, size_t), int fd, void *_s, size_t n);
+#include "atomicio.h"
/*
- * ensure all of data on socket comes through. f==read || f==write
+ * ensure all of data on socket comes through. f==read || f==vwrite
*/
-ssize_t
-atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n)
+size_t
+atomicio(f, fd, _s, n)
+ ssize_t (*f) (int, void *, size_t);
+ int fd;
+ void *_s;
+ size_t n;
{
char *s = _s;
- ssize_t res, pos = 0;
+ size_t pos = 0;
+ ssize_t res;
while (n > pos) {
res = (f) (fd, s + pos, n - pos);
@@ -46,11 +52,13 @@ atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n)
case -1:
if (errno == EINTR || errno == EAGAIN)
continue;
+ return 0;
case 0:
- return (res);
+ errno = EPIPE;
+ return pos;
default:
- pos += res;
+ pos += (size_t)res;
}
}
- return (pos);
+ return pos;
}
diff --git a/contrib/netcat/atomicio.h b/contrib/netcat/atomicio.h
new file mode 100644
index 000000000000..551a0565da82
--- /dev/null
+++ b/contrib/netcat/atomicio.h
@@ -0,0 +1,33 @@
+/* $OpenBSD: atomicio.h,v 1.1 2005/05/24 20:13:28 avsm Exp $ */
+
+/*
+ * Copyright (c) 1995,1999 Theo de Raadt. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Ensure all of data on socket comes through. f==read || f==vwrite
+ */
+size_t atomicio(ssize_t (*)(int, void *, size_t), int, void *, size_t);
+
+#define vwrite (ssize_t (*)(int, void *, size_t))write
diff --git a/contrib/netcat/nc.1 b/contrib/netcat/nc.1
index 472fa76cb913..852ded8ef893 100644
--- a/contrib/netcat/nc.1
+++ b/contrib/netcat/nc.1
@@ -1,4 +1,4 @@
-.\" $OpenBSD: nc.1,v 1.36 2005/01/07 10:11:31 jmc Exp $
+.\" $OpenBSD: nc.1,v 1.43 2006/01/31 09:34:12 jmc Exp $
.\"
.\" Copyright (c) 1996 David Sacerdote
.\" All rights reserved.
@@ -36,8 +36,10 @@
.Bk -words
.Op Fl 46DdhklnrStUuvz
.Op Fl i Ar interval
+.Op Fl P Ar proxy_username
.Op Fl p Ar source_port
.Op Fl s Ar source_ip_address
+.Op Fl T Ar ToS
.Op Fl w Ar timeout
.Op Fl X Ar proxy_protocol
.Oo Xo
@@ -127,6 +129,10 @@ option are ignored.
.It Fl n
Do not do any DNS or service lookups on any specified addresses,
hostnames or ports.
+.It Fl P Ar proxy_username
+Specifies a username to present to a proxy server that requires authentication.
+If no username is specified then authentication will not be attempted.
+Proxy authentication is only supported for HTTP CONNECT proxies at present.
.It Fl p Ar source_port
Specifies the source port
.Nm
@@ -145,6 +151,14 @@ Specifies the IP of the interface which is used to send the packets.
It is an error to use this option in conjunction with the
.Fl l
option.
+.It Fl T Ar ToS
+Specifies IP Type of Service (ToS) for the connection.
+Valid values are the tokens
+.Dq lowdelay ,
+.Dq throughput ,
+.Dq reliability ,
+or an 8-bit hexadecimal value preceded by
+.Dq 0x .
.It Fl t
Causes
.Nm
@@ -174,7 +188,7 @@ will listen forever for a connection, with or without the
.Fl w
flag.
The default is no timeout.
-.It Fl X Ar proxy_version
+.It Fl X Ar proxy_protocol
Requests that
.Nm
should use the specified protocol when talking to the proxy server.
@@ -290,8 +304,9 @@ It can aid in troubleshooting,
when it might be necessary to verify what data a server is sending
in response to commands issued by the client.
For example, to retrieve the home page of a web site:
-.Pp
-.Dl $ echo \&"GET\&" | nc host.example.com 80
+.Bd -literal -offset indent
+$ echo -n "GET / HTTP/1.0\er\en\er\en" | nc host.example.com 80
+.Ed
.Pp
Note that this also displays the headers sent by the web server.
They can be filtered, using a tool such as
@@ -319,15 +334,11 @@ The
.Fl z
flag can be used to tell
.Nm
-not to initiate a connection,
-together with the
-.Fl v
-.Pq verbose
-flag,
-to report open ports.
+to report open ports,
+rather than initiate a connection.
For example:
.Bd -literal -offset indent
-$ nc -vz host.example.com 20-30
+$ nc -z 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
@@ -351,37 +362,53 @@ Protocol mismatch.
220 host.example.com IMS SMTP Receiver Version 0.84 Ready
.Ed
.Sh EXAMPLES
-Open a TCP connection to port 42 of hostname, using port 31337 as
+Open a TCP connection to port 42 of host.example.com, using port 31337 as
the source port, with a timeout of 5 seconds:
.Pp
-.Dl $ nc -p 31337 -w 5 hostname 42
+.Dl $ nc -p 31337 -w 5 host.example.com 42
.Pp
-Open a UDP connection to port 53 of hostname:
+Open a UDP connection to port 53 of host.example.com:
.Pp
-.Dl $ nc -u hostname 53
+.Dl $ nc -u host.example.com 53
.Pp
-Open a TCP connection to port 42 of example.host using 10.1.2.3 as the
+Open a TCP connection to port 42 of host.example.com using 10.1.2.3 as the
IP for the local end of the connection:
.Pp
-.Dl $ nc -s 10.1.2.3 example.host 42
-.Pp
-Send UDP packets to ports 20-30 of example.host, and report which ones
-responded with an ICMP packet after three seconds:
-.Pp
-.Dl $ nc -uvz -w 3 hostname 20-30
+.Dl $ nc -s 10.1.2.3 host.example.com 42
.Pp
Create and listen on a Unix Domain Socket:
.Pp
.Dl $ nc -lU /var/tmp/dsocket
.Pp
-Connect to port 42 of hostname via an HTTP proxy at 10.2.3.4, port 8080:
+Connect to port 42 of host.example.com via an HTTP proxy at 10.2.3.4,
+port 8080.
+This example could also be used by
+.Xr ssh 1 ;
+see the
+.Cm ProxyCommand
+directive in
+.Xr ssh_config 5
+for more information.
+.Pp
+.Dl $ nc -x10.2.3.4:8080 -Xconnect host.example.com 42
.Pp
-.Dl $ nc -x10.2.3.4:8080 -Xconnect hostname 42
+The same example again, this time enabling proxy authentication with username
+.Dq ruser
+if the proxy requires it:
+.Pp
+.Dl $ nc -x10.2.3.4:8080 -Xconnect -Pruser host.example.com 42
.Sh SEE ALSO
-.Xr cat 1
+.Xr cat 1 ,
+.Xr ssh 1
.Sh AUTHORS
Original implementation by *Hobbit*
.Aq hobbit@avian.org .
.br
Rewritten with IPv6 support by
.An Eric Jackson Aq ericj@monkey.org .
+.Sh CAVEATS
+UDP port scans will always succeed
+(i.e. report the port as open),
+rendering the
+.Fl uz
+combination of flags relatively useless.
diff --git a/contrib/netcat/netcat.c b/contrib/netcat/netcat.c
index 3c610b9913bb..bea1b79ba5ec 100644
--- a/contrib/netcat/netcat.c
+++ b/contrib/netcat/netcat.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: netcat.c,v 1.76 2004/12/10 16:51:31 hshoexer Exp $ */
+/* $OpenBSD: netcat.c,v 1.87 2006/02/01 21:33:14 otto Exp $ */
/*
* Copyright (c) 2001 Eric Jackson <ericj@monkey.org>
*
@@ -37,7 +37,9 @@
#include <sys/un.h>
#include <netinet/in.h>
+#include <netinet/in_systm.h>
#include <netinet/tcp.h>
+#include <netinet/ip.h>
#include <arpa/telnet.h>
#include <err.h>
@@ -50,6 +52,8 @@
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
+#include <limits.h>
+#include "atomicio.h"
#ifndef SUN_LEN
#define SUN_LEN(su) \
@@ -62,9 +66,11 @@
/* Command Line Options */
int dflag; /* detached, no stdin */
int iflag; /* Interval Flag */
+int jflag; /* use jumbo frames if we can */
int kflag; /* More than one connect */
int lflag; /* Bind to local port */
int nflag; /* Don't do name look up */
+char *Pflag; /* Proxy username */
char *pflag; /* Localport flag */
int rflag; /* Random ports flag */
char *sflag; /* Source Address */
@@ -75,23 +81,25 @@ int xflag; /* Socks proxy */
int zflag; /* Port Scan Flag */
int Dflag; /* sodebug */
int Sflag; /* TCP MD5 signature option */
+int Tflag = -1; /* IP Type of Service */
int timeout = -1;
int family = AF_UNSPEC;
char *portlist[PORT_MAX+1];
-ssize_t atomicio(ssize_t (*)(int, void *, size_t), int, void *, size_t);
void atelnet(int, unsigned char *, unsigned int);
void build_ports(char *);
void help(void);
int local_listen(char *, char *, struct addrinfo);
void readwrite(int);
-int remote_connect(char *, char *, struct addrinfo);
-int socks_connect(char *, char *, struct addrinfo, char *, char *,
- struct addrinfo, int);
+int remote_connect(const char *, const char *, struct addrinfo);
+int socks_connect(const char *, const char *, struct addrinfo,
+ const char *, const char *, struct addrinfo, int, const char *);
int udptest(int);
int unix_connect(char *);
int unix_listen(char *);
+void set_common_sockopts(int);
+int parse_iptos(char *);
void usage(int);
int
@@ -104,7 +112,7 @@ main(int argc, char *argv[])
socklen_t len;
struct sockaddr_storage cliaddr;
char *proxy;
- char *proxyhost = "", *proxyport = NULL;
+ const char *proxyhost = "", *proxyport = NULL;
struct addrinfo proxyhints;
ret = 1;
@@ -115,7 +123,8 @@ main(int argc, char *argv[])
endp = NULL;
sv = NULL;
- while ((ch = getopt(argc, argv, "46Ddhi:klnp:rSs:tUuvw:X:x:z")) != -1) {
+ while ((ch = getopt(argc, argv,
+ "46Ddhi:jklnP:p:rSs:tT:Uuvw:X:x:z")) != -1) {
switch (ch) {
case '4':
family = AF_INET;
@@ -147,6 +156,9 @@ main(int argc, char *argv[])
if (iflag < 0 || *endp != '\0')
errx(1, "interval cannot be negative");
break;
+ case 'j':
+ jflag = 1;
+ break;
case 'k':
kflag = 1;
break;
@@ -156,6 +168,9 @@ main(int argc, char *argv[])
case 'n':
nflag = 1;
break;
+ case 'P':
+ Pflag = optarg;
+ break;
case 'p':
pflag = optarg;
break;
@@ -196,6 +211,9 @@ main(int argc, char *argv[])
case 'S':
Sflag = 1;
break;
+ case 'T':
+ Tflag = parse_iptos(optarg);
+ break;
default:
usage(1);
}
@@ -286,12 +304,13 @@ main(int argc, char *argv[])
* functions to talk to the caller.
*/
if (uflag) {
- int rv;
- char buf[1024];
+ int rv, plen;
+ char buf[8192];
struct sockaddr_storage z;
len = sizeof(z);
- rv = recvfrom(s, buf, sizeof(buf), MSG_PEEK,
+ plen = jflag ? 8192 : 1024;
+ rv = recvfrom(s, buf, plen, MSG_PEEK,
(struct sockaddr *)&z, &len);
if (rv < 0)
err(1, "recvfrom");
@@ -302,6 +321,7 @@ main(int argc, char *argv[])
connfd = s;
} else {
+ len = sizeof(cliaddr);
connfd = accept(s, (struct sockaddr *)&cliaddr,
&len);
}
@@ -338,7 +358,8 @@ main(int argc, char *argv[])
if (xflag)
s = socks_connect(host, portlist[i], hints,
- proxyhost, proxyport, proxyhints, socksv);
+ proxyhost, proxyport, proxyhints, socksv,
+ Pflag);
else
s = remote_connect(host, portlist[i], hints);
@@ -452,10 +473,10 @@ unix_listen(char *path)
* port or source address if needed. Returns -1 on failure.
*/
int
-remote_connect(char *host, char *port, struct addrinfo hints)
+remote_connect(const char *host, const char *port, struct addrinfo hints)
{
struct addrinfo *res, *res0;
- int s, error, x = 1;
+ int s, error;
if ((error = getaddrinfo(host, port, &hints, &res)))
errx(1, "getaddrinfo: %s", gai_strerror(error));
@@ -470,13 +491,6 @@ remote_connect(char *host, char *port, struct addrinfo hints)
if (sflag || pflag) {
struct addrinfo ahints, *ares;
- if (!(sflag && pflag)) {
- if (!sflag)
- sflag = NULL;
- else
- pflag = NULL;
- }
-
memset(&ahints, 0, sizeof(struct addrinfo));
ahints.ai_family = res0->ai_family;
ahints.ai_socktype = uflag ? SOCK_DGRAM : SOCK_STREAM;
@@ -490,16 +504,8 @@ remote_connect(char *host, char *port, struct addrinfo hints)
errx(1, "bind failed: %s", strerror(errno));
freeaddrinfo(ares);
}
- if (Sflag) {
- if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
- &x, sizeof(x)) == -1)
- err(1, NULL);
- }
- if (Dflag) {
- if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
- &x, sizeof(x)) == -1)
- err(1, NULL);
- }
+
+ set_common_sockopts(s);
if (connect(s, res0->ai_addr, res0->ai_addrlen) == 0)
break;
@@ -544,23 +550,14 @@ local_listen(char *host, char *port, struct addrinfo hints)
res0 = res;
do {
if ((s = socket(res0->ai_family, res0->ai_socktype,
- res0->ai_protocol)) == 0)
+ res0->ai_protocol)) < 0)
continue;
ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
if (ret == -1)
err(1, NULL);
- if (Sflag) {
- ret = setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
- &x, sizeof(x));
- if (ret == -1)
- err(1, NULL);
- }
- if (Dflag) {
- if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
- &x, sizeof(x)) == -1)
- err(1, NULL);
- }
+
+ set_common_sockopts(s);
if (bind(s, (struct sockaddr *)res0->ai_addr,
res0->ai_addrlen) == 0)
@@ -588,9 +585,12 @@ void
readwrite(int nfd)
{
struct pollfd pfd[2];
- unsigned char buf[BUFSIZ];
- int wfd = fileno(stdin), n;
+ unsigned char buf[8192];
+ int n, wfd = fileno(stdin);
int lfd = fileno(stdout);
+ int plen;
+
+ plen = jflag ? 8192 : 1024;
/* Setup Network FD */
pfd[0].fd = nfd;
@@ -613,7 +613,7 @@ readwrite(int nfd)
return;
if (pfd[0].revents & POLLIN) {
- if ((n = read(nfd, buf, sizeof(buf))) < 0)
+ if ((n = read(nfd, buf, plen)) < 0)
return;
else if (n == 0) {
shutdown(nfd, SHUT_RD);
@@ -622,22 +622,20 @@ readwrite(int nfd)
} else {
if (tflag)
atelnet(nfd, buf, n);
- if (atomicio((ssize_t (*)(int, void *, size_t))write,
- lfd, buf, n) != n)
+ if (atomicio(vwrite, lfd, buf, n) != n)
return;
}
}
if (!dflag && pfd[1].revents & POLLIN) {
- if ((n = read(wfd, buf, sizeof(buf))) < 0)
+ if ((n = read(wfd, buf, plen)) < 0)
return;
else if (n == 0) {
shutdown(nfd, SHUT_WR);
pfd[1].fd = -1;
pfd[1].events = 0;
} else {
- if (atomicio((ssize_t (*)(int, void *, size_t))write,
- nfd, buf, n) != n)
+ if (atomicio(vwrite, nfd, buf, n) != n)
return;
}
}
@@ -668,9 +666,8 @@ atelnet(int nfd, unsigned char *buf, unsigned int size)
p++;
obuf[2] = *p;
obuf[3] = '\0';
- if (atomicio((ssize_t (*)(int, void *, size_t))write,
- nfd, obuf, 3) != 3)
- warnx("Write Error!");
+ if (atomicio(vwrite, nfd, obuf, 3) != 3)
+ warn("Write Error!");
obuf[0] = '\0';
}
}
@@ -762,6 +759,50 @@ udptest(int s)
}
void
+set_common_sockopts(int s)
+{
+ int x = 1;
+
+ if (Sflag) {
+ if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
+ &x, sizeof(x)) == -1)
+ err(1, NULL);
+ }
+ if (Dflag) {
+ if (setsockopt(s, SOL_SOCKET, SO_DEBUG,
+ &x, sizeof(x)) == -1)
+ err(1, NULL);
+ }
+ if (jflag) {
+ if (setsockopt(s, SOL_SOCKET, SO_JUMBO,
+ &x, sizeof(x)) == -1)
+ err(1, NULL);
+ }
+ if (Tflag != -1) {
+ if (setsockopt(s, IPPROTO_IP, IP_TOS,
+ &Tflag, sizeof(Tflag)) == -1)
+ err(1, "set IP ToS");
+ }
+}
+
+int
+parse_iptos(char *s)
+{
+ int tos = -1;
+
+ if (strcmp(s, "lowdelay") == 0)
+ return (IPTOS_LOWDELAY);
+ if (strcmp(s, "throughput") == 0)
+ return (IPTOS_THROUGHPUT);
+ if (strcmp(s, "reliability") == 0)
+ return (IPTOS_RELIABILITY);
+
+ if (sscanf(s, "0x%x", &tos) != 1 || tos < 0 || tos > 0xff)
+ errx(1, "invalid IP Type of Service");
+ return (tos);
+}
+
+void
help(void)
{
usage(0);
@@ -775,10 +816,12 @@ help(void)
\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\
+ \t-P proxyuser\tUsername for proxy authentication\n\
\t-p port\t Specify local port for remote connects\n\
\t-r Randomize remote ports\n\
\t-S Enable the TCP MD5 signature option\n\
\t-s addr\t Local source address\n\
+ \t-T ToS\t Set IP Type of Service\n\
\t-t Answer TELNET negotiation\n\
\t-U Use UNIX domain socket\n\
\t-u UDP mode\n\
@@ -795,7 +838,7 @@ void
usage(int ret)
{
fprintf(stderr, "usage: nc [-46DdhklnrStUuvz] [-i interval] [-p source_port]\n");
- fprintf(stderr, "\t [-s source_ip_address] [-w timeout] [-X proxy_version]\n");
+ fprintf(stderr, "\t [-s source_ip_address] [-T ToS] [-w timeout] [-X proxy_version]\n");
fprintf(stderr, "\t [-x proxy_address[:port]] [hostname] [port[s]]\n");
if (ret)
exit(1);
diff --git a/contrib/netcat/socks.c b/contrib/netcat/socks.c
index e7d35b601a07..daed99712e3f 100644
--- a/contrib/netcat/socks.c
+++ b/contrib/netcat/socks.c
@@ -1,7 +1,8 @@
-/* $OpenBSD: socks.c,v 1.9 2004/10/17 03:13:55 djm Exp $ */
+/* $OpenBSD: socks.c,v 1.16 2006/01/25 23:21:37 djm Exp $ */
/*
* Copyright (c) 1999 Niklas Hallqvist. All rights reserved.
+ * Copyright (c) 2004, 2005 Damien Miller. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -36,6 +37,9 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
+#include <resolv.h>
+#include <readpassphrase.h>
+#include "atomicio.h"
#define SOCKS_PORT "1080"
#define HTTP_PROXY_PORT "3128"
@@ -46,57 +50,53 @@
#define SOCKS_NOMETHOD 0xff
#define SOCKS_CONNECT 1
#define SOCKS_IPV4 1
+#define SOCKS_DOMAIN 3
+#define SOCKS_IPV6 4
+int remote_connect(const char *, const char *, struct addrinfo);
+int socks_connect(const char *, const char *, struct addrinfo,
+ const char *, const char *, struct addrinfo, int,
+ const char *);
-int remote_connect(char *, char *, struct addrinfo);
-int socks_connect(char *host, char *port, struct addrinfo hints,
- char *proxyhost, char *proxyport, struct addrinfo proxyhints,
- int socksv);
-
-static in_addr_t
-decode_addr(const char *s)
+static int
+decode_addrport(const char *h, const char *p, struct sockaddr *addr,
+ socklen_t addrlen, int v4only, int numeric)
{
- struct hostent *hp = gethostbyname (s);
- struct in_addr retval;
-
- if (hp)
- return *(in_addr_t *)hp->h_addr_list[0];
- if (inet_aton (s, &retval))
- return retval.s_addr;
- errx (1, "cannot decode address \"%s\"", s);
-}
+ int r;
+ struct addrinfo hints, *res;
-static in_port_t
-decode_port(const char *s)
-{
- struct servent *sp;
- in_port_t port;
- char *p;
-
- port = strtol (s, &p, 10);
- if (s == p) {
- sp = getservbyname (s, "tcp");
- if (sp)
- return sp->s_port;
+ bzero(&hints, sizeof(hints));
+ hints.ai_family = v4only ? PF_INET : PF_UNSPEC;
+ hints.ai_flags = numeric ? AI_NUMERICHOST : 0;
+ hints.ai_socktype = SOCK_STREAM;
+ r = getaddrinfo(h, p, &hints, &res);
+ /* Don't fatal when attempting to convert a numeric address */
+ if (r != 0) {
+ if (!numeric) {
+ errx(1, "getaddrinfo(\"%.64s\", \"%.64s\"): %s", h, p,
+ gai_strerror(r));
+ }
+ return (-1);
+ }
+ if (addrlen < res->ai_addrlen) {
+ freeaddrinfo(res);
+ errx(1, "internal error: addrlen < res->ai_addrlen");
}
- if (*s != '\0' && *p == '\0')
- return htons (port);
- errx (1, "cannot decode port \"%s\"", s);
+ memcpy(addr, res->ai_addr, res->ai_addrlen);
+ freeaddrinfo(res);
+ return (0);
}
static int
-proxy_read_line(int fd, char *buf, int bufsz)
+proxy_read_line(int fd, char *buf, size_t bufsz)
{
- int r, off;
+ size_t off;
for(off = 0;;) {
if (off >= bufsz)
errx(1, "proxy read too long");
- if ((r = read(fd, buf + off, 1)) <= 0) {
- if (r == -1 && errno == EINTR)
- continue;
+ if (atomicio(read, fd, buf + off, 1) != 1)
err(1, "proxy read");
- }
/* Skip CR */
if (buf[off] == '\r')
continue;
@@ -109,127 +109,217 @@ proxy_read_line(int fd, char *buf, int bufsz)
return (off);
}
+static const char *
+getproxypass(const char *proxyuser, const char *proxyhost)
+{
+ char prompt[512];
+ static char pw[256];
+
+ snprintf(prompt, sizeof(prompt), "Proxy password for %s@%s: ",
+ proxyuser, proxyhost);
+ if (readpassphrase(prompt, pw, sizeof(pw), RPP_REQUIRE_TTY) == NULL)
+ errx(1, "Unable to read proxy passphrase");
+ return (pw);
+}
+
int
-socks_connect(char *host, char *port, struct addrinfo hints,
- char *proxyhost, char *proxyport, struct addrinfo proxyhints,
- int socksv)
+socks_connect(const char *host, const char *port,
+ struct addrinfo hints __attribute__ ((__unused__)),
+ const char *proxyhost, const char *proxyport, struct addrinfo proxyhints,
+ int socksv, const char *proxyuser)
{
- int proxyfd, r;
+ int proxyfd, r, authretry = 0;
+ size_t hlen, wlen;
unsigned char buf[1024];
- ssize_t cnt;
- in_addr_t serveraddr;
+ size_t cnt;
+ struct sockaddr_storage addr;
+ struct sockaddr_in *in4 = (struct sockaddr_in *)&addr;
+ struct sockaddr_in6 *in6 = (struct sockaddr_in6 *)&addr;
in_port_t serverport;
+ const char *proxypass = NULL;
if (proxyport == NULL)
proxyport = (socksv == -1) ? HTTP_PROXY_PORT : SOCKS_PORT;
+ /* Abuse API to lookup port */
+ if (decode_addrport("0.0.0.0", port, (struct sockaddr *)&addr,
+ sizeof(addr), 1, 1) == -1)
+ errx(1, "unknown port \"%.64s\"", port);
+ serverport = in4->sin_port;
+
+ again:
+ if (authretry++ > 3)
+ errx(1, "Too many authentication failures");
+
proxyfd = remote_connect(proxyhost, proxyport, proxyhints);
if (proxyfd < 0)
- return -1;
-
- serveraddr = decode_addr (host);
- serverport = decode_port (port);
+ return (-1);
if (socksv == 5) {
+ if (decode_addrport(host, port, (struct sockaddr *)&addr,
+ sizeof(addr), 0, 1) == -1)
+ addr.ss_family = 0; /* used in switch below */
+
/* Version 5, one method: no authentication */
buf[0] = SOCKS_V5;
buf[1] = 1;
buf[2] = SOCKS_NOAUTH;
- cnt = write (proxyfd, buf, 3);
- if (cnt == -1)
- err (1, "write failed");
+ cnt = atomicio(vwrite, proxyfd, buf, 3);
if (cnt != 3)
- errx (1, "short write, %d (expected 3)", cnt);
+ err(1, "write failed (%d/3)", cnt);
+
+ cnt = atomicio(read, proxyfd, buf, 2);
+ if (cnt != 2)
+ err(1, "read failed (%d/3)", cnt);
- read (proxyfd, buf, 2);
if (buf[1] == SOCKS_NOMETHOD)
- errx (1, "authentication method negotiation failed");
+ errx(1, "authentication method negotiation failed");
- /* Version 5, connect: IPv4 address */
- buf[0] = SOCKS_V5;
- buf[1] = SOCKS_CONNECT;
- buf[2] = 0;
- buf[3] = SOCKS_IPV4;
- memcpy (buf + 4, &serveraddr, sizeof serveraddr);
- memcpy (buf + 8, &serverport, sizeof serverport);
-
- /* XXX Handle short writes better */
- cnt = write (proxyfd, buf, 10);
- if (cnt == -1)
- err (1, "write failed");
- if (cnt != 10)
- errx (1, "short write, %d (expected 10)", cnt);
+ switch (addr.ss_family) {
+ case 0:
+ /* Version 5, connect: domain name */
+
+ /* Max domain name length is 255 bytes */
+ hlen = strlen(host);
+ if (hlen > 255)
+ errx(1, "host name too long for SOCKS5");
+ buf[0] = SOCKS_V5;
+ buf[1] = SOCKS_CONNECT;
+ buf[2] = 0;
+ buf[3] = SOCKS_DOMAIN;
+ buf[4] = hlen;
+ memcpy(buf + 5, host, hlen);
+ memcpy(buf + 5 + hlen, &serverport, sizeof serverport);
+ wlen = 7 + hlen;
+ break;
+ case AF_INET:
+ /* Version 5, connect: IPv4 address */
+ buf[0] = SOCKS_V5;
+ buf[1] = SOCKS_CONNECT;
+ buf[2] = 0;
+ buf[3] = SOCKS_IPV4;
+ memcpy(buf + 4, &in4->sin_addr, sizeof in4->sin_addr);
+ memcpy(buf + 8, &in4->sin_port, sizeof in4->sin_port);
+ wlen = 10;
+ break;
+ case AF_INET6:
+ /* Version 5, connect: IPv6 address */
+ buf[0] = SOCKS_V5;
+ buf[1] = SOCKS_CONNECT;
+ buf[2] = 0;
+ buf[3] = SOCKS_IPV6;
+ memcpy(buf + 4, &in6->sin6_addr, sizeof in6->sin6_addr);
+ memcpy(buf + 20, &in6->sin6_port,
+ sizeof in6->sin6_port);
+ wlen = 22;
+ break;
+ default:
+ errx(1, "internal error: silly AF");
+ }
- /* XXX Handle short reads better */
- cnt = read (proxyfd, buf, sizeof buf);
- if (cnt == -1)
- err (1, "read failed");
+ cnt = atomicio(vwrite, proxyfd, buf, wlen);
+ if (cnt != wlen)
+ err(1, "write failed (%d/%d)", cnt, wlen);
+
+ cnt = atomicio(read, proxyfd, buf, 10);
if (cnt != 10)
- errx (1, "unexpected reply size %d (expected 10)", cnt);
+ err(1, "read failed (%d/10)", cnt);
if (buf[1] != 0)
- errx (1, "connection failed, SOCKS error %d", buf[1]);
+ errx(1, "connection failed, SOCKS error %d", buf[1]);
} else if (socksv == 4) {
+ /* This will exit on lookup failure */
+ decode_addrport(host, port, (struct sockaddr *)&addr,
+ sizeof(addr), 1, 0);
+
/* Version 4 */
buf[0] = SOCKS_V4;
buf[1] = SOCKS_CONNECT; /* connect */
- memcpy (buf + 2, &serverport, sizeof serverport);
- memcpy (buf + 4, &serveraddr, sizeof serveraddr);
+ memcpy(buf + 2, &in4->sin_port, sizeof in4->sin_port);
+ memcpy(buf + 4, &in4->sin_addr, sizeof in4->sin_addr);
buf[8] = 0; /* empty username */
+ wlen = 9;
- cnt = write (proxyfd, buf, 9);
- if (cnt == -1)
- err (1, "write failed");
- if (cnt != 9)
- errx (1, "short write, %d (expected 9)", cnt);
+ cnt = atomicio(vwrite, proxyfd, buf, wlen);
+ if (cnt != wlen)
+ err(1, "write failed (%d/%d)", cnt, wlen);
- /* XXX Handle short reads better */
- cnt = read (proxyfd, buf, 8);
- if (cnt == -1)
- err (1, "read failed");
+ cnt = atomicio(read, proxyfd, buf, 8);
if (cnt != 8)
- errx (1, "unexpected reply size %d (expected 8)", cnt);
+ err(1, "read failed (%d/8)", cnt);
if (buf[1] != 90)
- errx (1, "connection failed, SOCKS error %d", buf[1]);
+ errx(1, "connection failed, SOCKS error %d", buf[1]);
} else if (socksv == -1) {
/* HTTP proxy CONNECT */
/* Disallow bad chars in hostname */
if (strcspn(host, "\r\n\t []:") != strlen(host))
- errx (1, "Invalid hostname");
+ errx(1, "Invalid hostname");
/* Try to be sane about numeric IPv6 addresses */
if (strchr(host, ':') != NULL) {
r = snprintf(buf, sizeof(buf),
- "CONNECT [%s]:%d HTTP/1.0\r\n\r\n",
+ "CONNECT [%s]:%d HTTP/1.0\r\n",
host, ntohs(serverport));
} else {
r = snprintf(buf, sizeof(buf),
- "CONNECT %s:%d HTTP/1.0\r\n\r\n",
+ "CONNECT %s:%d HTTP/1.0\r\n",
host, ntohs(serverport));
}
- if (r == -1 || r >= sizeof(buf))
- errx (1, "hostname too long");
+ if (r == -1 || (size_t)r >= sizeof(buf))
+ errx(1, "hostname too long");
r = strlen(buf);
- /* XXX atomicio */
- cnt = write (proxyfd, buf, r);
- if (cnt == -1)
- err (1, "write failed");
+ cnt = atomicio(vwrite, proxyfd, buf, r);
if (cnt != r)
- errx (1, "short write, %d (expected %d)", cnt, r);
+ err(1, "write failed (%d/%d)", cnt, r);
+
+ if (authretry > 1) {
+ char resp[1024];
+
+ proxypass = getproxypass(proxyuser, proxyhost);
+ r = snprintf(buf, sizeof(buf), "%s:%s",
+ proxyuser, proxypass);
+ if (r == -1 || (size_t)r >= sizeof(buf) ||
+ b64_ntop(buf, strlen(buf), resp,
+ sizeof(resp)) == -1)
+ errx(1, "Proxy username/password too long");
+ r = snprintf(buf, sizeof(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);
+ if ((cnt = atomicio(vwrite, proxyfd, buf, r)) != r)
+ err(1, "write failed (%d/%d)", cnt, r);
+ }
+
+ /* Terminate headers */
+ if ((r = atomicio(vwrite, proxyfd, "\r\n", 2)) != 2)
+ err(1, "write failed (2/%d)", r);
+
+ /* Read status reply */
+ proxy_read_line(proxyfd, buf, sizeof(buf));
+ if (proxyuser != NULL &&
+ strncmp(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)
+ errx(1, "Proxy error: \"%s\"", buf);
- /* Read reply */
+ /* Headers continue until we hit an empty line */
for (r = 0; r < HTTP_MAXHDRS; r++) {
proxy_read_line(proxyfd, buf, sizeof(buf));
- if (r == 0 && strncmp(buf, "HTTP/1.0 200 ", 12) != 0)
- errx (1, "Proxy error: \"%s\"", buf);
- /* Discard headers until we hit an empty line */
if (*buf == '\0')
break;
}
+ if (*buf != '\0')
+ errx(1, "Too many proxy headers received");
} else
- errx (1, "Unknown proxy protocol %d", socksv);
+ errx(1, "Unknown proxy protocol %d", socksv);
- return proxyfd;
+ return (proxyfd);
}