usocks: dropped
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281395695e
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222ae3fc99
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42F8B4E30B673606
@ -1,9 +0,0 @@
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drwxr-xr-x root/root usr/
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drwxr-xr-x root/root usr/bin/
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-rwxr-xr-x root/root usr/bin/usocks
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drwxr-xr-x root/root usr/lib/
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-rw-r--r-- root/root usr/lib/preloadable-usocks.so
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drwxr-xr-x root/root usr/share/
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drwxr-xr-x root/root usr/share/man/
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drwxr-xr-x root/root usr/share/man/man1/
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-rw-r--r-- root/root usr/share/man/man1/usocks.1.gz
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@ -1,8 +0,0 @@
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untrusted comment: verify with /etc/ports/contrib.pub
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RWSagIOpLGJF33JcLXhxAG9CY9n+27hg0iTZ0IZBgwS4SOhfpKbzhpa0PJl4DnJFIvSr7bhtwE02B8n05ArALbBxC1xWUdUIBQM=
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SHA256 (Pkgfile) = 03f203182754e42bb77ec6d1147e130e40667e1e9759ca666b1687b33854b570
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SHA256 (.footprint) = 83e6dfb568c52a5c9a2ec7cff5083bd1e0467bcd60f8bce6bf84dadf9b927c14
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SHA256 (usocks) = 2f12cbd959581ffd39ca46d82430604756215f644ab9fce2719a1f0c3efa21d5
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SHA256 (usocks.c) = 78f18e4a1d896dcfbd5918a2e67bb1efa75222e07f7a755d4cdd60d33d5af6a4
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SHA256 (usocks.1) = d1b4e865705e4703ddea776f93e1214672c400196b7b7c659f9de19dc8a35d2d
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SHA256 (makefile) = d419d35695835546f34ce614106037d07cf8038ad7fc9b2a874c1cc330904baa
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@ -1,16 +0,0 @@
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# Description: detour network traffic through SOCKS5 proxy
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# URL: https://fenua.org/gaetan/src/usocks-0.7.c
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# Maintainer: Steffen Nurpmeso, steffen at sdaoden dot eu
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name=usocks
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version=20200917
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release=2
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source=(usocks usocks.c usocks.1 makefile)
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build () {
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make
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install -d "${PKG}"/usr/{bin,lib,share/man/man1}
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install -m 755 ${name} "${PKG}"/usr/bin/
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install -m 644 preloadable-${name}.so "${PKG}"/usr/lib/
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install -m 644 ${name}.1 "${PKG}"/usr/share/man/man1/
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}
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@ -1,10 +0,0 @@
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CC = cc
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LIB = preloadable-usocks.so
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SOURCES = usocks.c
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$(LIB): $(SOURCES)
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$(CC) $(CFLAGS) -fPIC -ldl -shared -o $(@) $(SOURCES)
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all: $(LIB)
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clean: ; rm -f $(LIB)
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force: clean all
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@ -1,21 +0,0 @@
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#!/bin/sh -
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#@ usocks - detour network traffic through SOCKS5 proxy.
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#@
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#@ Synopsis: usocks PROXY-ADDRESS PROXY-PORT COMMAND [:ARGS:]
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#
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# Public Domain
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ld_preload=/usr/lib/preloadable-usocks.so
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if [ ${#} -lt 3 ]; then
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echo >&2 'Synopsis: usocks PROXY-ADDRESS PROXY-PORT COMMAND [:ARGS:]'
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exit 64 # EX_USAGE
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fi
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USOCKS_ADDR=${1} USOCKS_PORT=${2} cmd=${3}
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shift 3
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LD_PRELOAD="${ld_preload} ${LD_PRELOAD}"
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export USOCKS_ADDR USOCKS_PORT LD_PRELOAD
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exec "${cmd}" "${@}"
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@ -1,47 +0,0 @@
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.\"@ usocks - detour network traffic through SOCKS5 proxy.
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.\"
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.\" Public Domain
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.
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.Dd September 17, 2020
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.Dt USOCKS 1
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.Os
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.
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.
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.Sh NAME
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.Nm usocks
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.Nd detour network traffic through SOCKS5 proxy
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.
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.
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.Sh SYNOPSIS
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.Nm
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.Ar proxy-address
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.Ar proxy-port
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.Ar command
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.Op Pf : Ar argument Ns \&:
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.
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.
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.Sh DESCRIPTION
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.
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.Nm
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can be used to detour stream-based network traffic of
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.Ar command
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through the specified SOCKS5 proxy.
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This is realized by preloading a shared library which overwrites the
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.Xr connect 2
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system call.
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Because of this simple approach the SOCKS5 provided DNS (name) lookup
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mechanism is not used.
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.Ar proxy-address
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must be an IPv4 internet address (like
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.Ql 127.0.0.1 ) .
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For example
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.
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.Bd -literal -offset indent
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# Login as USER on HOST, create a local SOCKS proxy on port 10000
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$ ssh -D 10000 USER@HOST
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# Thereafter use usocks(1) to proxy any command over it
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$ usocks 127.0.0.1 10000 irssi
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.Ed
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.
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.\" s-ts-mode
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195
usocks/usocks.c
195
usocks/usocks.c
@ -1,195 +0,0 @@
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/* This is https://fenua.org/gaetan/src/usocks-0.7.c */
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/*
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* Copyright (C) 2013-2018, Gaetan Bisson <bisson@archlinux.org>.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* USocks. Minimalistic SOCKS5 proxying library.
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*
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* USocks implements a connect() function over the system one in order to
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* forward connections through a prescribed SOCKS5 proxy; its design focuses
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* are code clarity and conciseness.
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*
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* Compile with:
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*
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* cc -O2 -fPIC -ldl -shared -o usocks.so usocks.c
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*
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* Use by exporting:
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*
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* USOCKS_PORT=7772
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* USOCKS_ADDR=127.0.0.1
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* LD_PRELOAD=`pwd`/usocks.so
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*/
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/* ****************************************************************************
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*
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* HEADERS
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*
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <dlfcn.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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/* ****************************************************************************
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*
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* INITIALIZE PROXY DATA AND LOCATE SYSTEM FUNCTIONS
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*
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*/
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struct sockaddr_in us_proxy;
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typedef int (*connect_t)(int, const struct sockaddr *, socklen_t);
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connect_t sys_connect;
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int us_init (void) {
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char *port = getenv("USOCKS_PORT");
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char *addr = getenv("USOCKS_ADDR");
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if (!port) return -1;
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if (!addr) return -1;
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memset(&us_proxy, 0, sizeof(us_proxy));
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us_proxy.sin_family = AF_INET;
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us_proxy.sin_port = htons(atoi(port));
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us_proxy.sin_addr.s_addr = inet_addr(addr);
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sys_connect = (connect_t)(intptr_t)dlsym(RTLD_NEXT, "connect");
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return 0;
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}
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/* ****************************************************************************
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*
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* LEAVE NO BYTES BEHIND
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*
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*/
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int us_sendall (int socket, const char *buffer, size_t length, int flags) {
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int r, off=0;
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while(off<length) {
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r = send(socket, buffer+off, length-off, flags);
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if (r<0) return -1;
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off += r;
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}
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return off;
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}
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int us_recvall (int socket, char *buffer, size_t length, int flags) {
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int r, off=0;
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while (off<length) {
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r = recv(socket, buffer+off, length-off, flags);
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if (r<0) return -1;
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off += r;
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}
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return off;
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}
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/* ****************************************************************************
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*
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* REDEFINE CONNECT()
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*
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*/
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const unsigned char l4[] = { 0x7f }; /* matches loopback IPv4 addresses */
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const unsigned char l6[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }; /* matches loopback IPv6 address */
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const unsigned char l64[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0x7f }; /* matches loopback IPv6to4 addresses */
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int connect (int sock, const struct sockaddr *addr, socklen_t len) {
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int p, t, v, f=sizeof(t);
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char b[256];
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if (!sys_connect) if (us_init()) return -1;
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/* let unix domain sockets and loopback traffic through */
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switch (addr->sa_family) {
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case AF_UNIX:
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return sys_connect(sock,addr,len);
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case AF_INET6:
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#if 0
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if (!memcmp(&(((struct sockaddr_in6 *)addr)->sin6_addr.s6_addr), l64, 13) ||
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!memcmp(&(((struct sockaddr_in6 *)addr)->sin6_addr.s6_addr), l6, 16))
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return sys_connect(sock,addr,len);
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#endif
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v=16;
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break;
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case AF_INET:
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#if 0
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/*if (!memcmp(&(((struct sockaddr_in *)addr)->sin_addr.s_addr), l4, 1))
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return sys_connect(sock,addr,len);*/
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#endif
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v=4;
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break;
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default:
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return -1;
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}
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/* let non-TCP through */
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getsockopt(sock, SOL_SOCKET, SO_TYPE, &t, (socklen_t *)&f);
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if (t!=SOCK_STREAM) return sys_connect(sock,addr,len);
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/* open blocking connection to proxy */
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f = fcntl(sock, F_GETFL);
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p = socket(AF_INET, SOCK_STREAM, 0);
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fcntl(p, F_SETFL, f & ~O_NONBLOCK);
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if (sys_connect(p,(struct sockaddr*)&us_proxy,sizeof(us_proxy))) return -1;
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/* protocol version and authentication method */
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memcpy(b, "\x05\x01\x00", 3);
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if (us_sendall(p,b,3,0)!=3) goto err;
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if (us_recvall(p,b,2,0)!=2) goto err;
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if (memcmp(b,"\x05\x00",2)) goto err;
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/* connection request */
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memcpy(b, "\x05\x01\x00", 3);
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if (v==4) {
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b[3] = '\x01';
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memcpy(b+4, &(((struct sockaddr_in *)addr)->sin_addr.s_addr), 4);
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memcpy(b+8, &(((struct sockaddr_in *)addr)->sin_port), 2);
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} else {
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b[3] = '\x04';
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memcpy(b+4, &(((struct sockaddr_in6 *)addr)->sin6_addr.s6_addr), 16);
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memcpy(b+20, &(((struct sockaddr_in6 *)addr)->sin6_port), 2);
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}
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if (us_sendall(p,b,v+6,0)!=v+6) goto err;
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if (us_recvall(p,b,4,0)!=4) goto err;
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if (memcmp(b,"\x05\x00\x00",3)) goto err;
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if (us_recvall(p,b,v+2,0)!=v+2) goto err;
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/* return proxy socket */
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close(sock);
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fcntl(p, F_SETFL, f);
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fcntl(p, F_DUPFD, sock);
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return 0;
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err:
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close(p);
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return -1;
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}
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