NetNews Usenet Archive 1992 #20

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Newsgroups: comp.sources.unix Path: sparky!uunet!spool.mu.edu!decwrl!pa.dec.com!tp From: thoth@lightning.cis.ufl.edu (Robert H. Forsman, Jr) Subject: v26i076: netpipes -- BSD network pipe tools, Part01/01 Message-ID: <1992Sep9.235949.21671@PA.dec.com> Originator: tp@cognition.pa.dec.com Sender: unix-sources-moderator@pa.dec.com Organization: DEC Palo Alto Date: Wed, 9 Sep 92 23:59:49 GMT Approved: vixie@pa.dec.com Lines: 1702 Submitted-By: thoth@lightning.cis.ufl.edu (Robert H. Forsman, Jr) Posting-Number: Volume 26, Issue 76 Archive-Name: netpipes/part01 faucet and hose: These two utilities are useful for connecting arbitrary programs over sockets. The power of the '|' character in the shell can now be used over the network. [ Compiled and tested on Ultrix 4.2 and SunOS 4.1.*. Faucet and hose are interesting utilities for working across the network, but remember that there is no provision for security in these tools. Also, you make want to change the destination directory for "make install" to be something like /usr/local/bin.] #! /bin/sh # This is a shell archive. Remove anything before this line, then unpack # it by saving it into a file and typing "sh file". To overwrite existing # files, type "sh file -c". You can also feed this as standard input via # unshar, or by typing "sh <file", e.g.. If this archive is complete, you # will see the following message at the end: # "End of archive 1 (of 1)." # Contents: COPYING Makefile README faucet.1 faucet.c hose.1 hose.c # portname.c # Wrapped by tp@cognition.pa.dec.com on Wed Sep 9 16:49:24 1992 PATH=/bin:/usr/bin:/usr/ucb ; export PATH if test -f 'COPYING' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'COPYING'\" else echo shar: Extracting \"'COPYING'\" $17981 characters$ sed "s/^X//" >'COPYING' <<'END_OF_FILE' X GNU GENERAL PUBLIC LICENSE X Version 2, June 1991 X X Copyright (C) 1989, 1991 Free Software Foundation, Inc. X 675 Mass Ave, Cambridge, MA 02139, USA X Everyone is permitted to copy and distribute verbatim copies X of this license document, but changing it is not allowed. X X Preamble X X The licenses for most software are designed to take away your Xfreedom to share and change it. By contrast, the GNU General Public XLicense is intended to guarantee your freedom to share and change free Xsoftware--to make sure the software is free for all its users. This XGeneral Public License applies to most of the Free Software XFoundation's software and to any other program whose authors commit to Xusing it. (Some other Free Software Foundation software is covered by Xhe GNU Library General Public License instead.) You can apply it to Xyour programs, too. X X When we speak of free software, we are referring to freedom, not Xprice. 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X XYou should also get your employer (if you work as a programmer) or your Xschool, if any, to sign a "copyright disclaimer" for the program, if Xnecessary. Here is a sample; alter the names: X X Yoyodyne, Inc., hereby disclaims all copyright interest in the program X `Gnomovision' (which makes passes at compilers) written by James Hacker. X X <signature of Ty Coon>, 1 April 1989 X Ty Coon, President of Vice X XThis General Public License does not permit incorporating your program into Xproprietary programs. If your program is a subroutine library, you may Xconsider it more useful to permit linking proprietary applications with the Xlibrary. If this is what you want to do, use the GNU Library General XPublic License instead of this License. END_OF_FILE if test 17981 -ne `wc -c <'COPYING'`; then echo shar: \"'COPYING'\" unpacked with wrong size! fi # end of 'COPYING' fi if test -f 'Makefile' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'Makefile'\" else echo shar: Extracting \"'Makefile'\" $1244 characters$ sed "s/^X//" >'Makefile' <<'END_OF_FILE' X# faucet and hose: network pipe utilities X# Copyright (C) 1992 Robert Forsman X# X# This program is free software; you can redistribute it and/or modify X# it under the terms of the GNU General Public License as published by X# the Free Software Foundation; either version 2 of the License, or X# (at your option) any later version. X# X# This program is distributed in the hope that it will be useful, X# but WITHOUT ANY WARRANTY; without even the implied warranty of X# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the X# GNU General Public License for more details. X# X# You should have received a copy of the GNU General Public License X# along with this program; if not, write to the Free Software X# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. X X# X# under HPUX you will probably have to make using LDLIBS=-lBSD X# X XCFLAGS = X XFOBJS = faucet.o portname.o XHOBJS = hose.o portname.o X Xall : faucet hose X Xfaucet : ${FOBJS} X ${CC} ${CFLAGS} -o $@ ${FOBJS} ${LDLIBS} X Xhose : ${HOBJS} X ${CC} ${CFLAGS} -o $@ ${HOBJS} ${LDLIBS} X Xinstall : all X cp faucet hose ${HOME}/bin/`mach` X cp faucet.1 hose.1 ${HOME}/man/man1 X Xclean : X rm -f ${FOBJS} ${HOBJS} X Xspotless: clean X rm -f *~ core hose faucet END_OF_FILE if test 1244 -ne `wc -c <'Makefile'`; then echo shar: \"'Makefile'\" unpacked with wrong size! fi # end of 'Makefile' fi if test -f 'README' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'README'\" else echo shar: Extracting \"'README'\" $6701 characters$ sed "s/^X//" >'README' <<'END_OF_FILE' X X"Mutant" Bob Forsman and his amazing 43 burner stove present X------------------------------------------------------------ X "stuff" X------------------------------------------------------------ X X This directory contains faucet and hose. X X X Xfaucet and hose: X X These two utilities are useful for connecting arbitrary programs Xover sockets. The power of the '|' characeter in the shell can now be Xused over the network. X As an example of what they can do, compile them and on one machine Xtype X Xlightning:21 % ./faucet 3000 "tar cf - ." out X X and on another type X Xsprings:3 % ./hose lightning 3000 "tar tvf -" in X X You will get output (from machine springs) that looks like this. X Xrwxr-xr-x771/50 0 Jul 7 11:53 1990 ./ Xrw-r-----771/50 9266 Jun 30 21:41 1990 ./faucet.c~ Xrw-r--r--771/50 6086 Mar 6 21:40 1990 ./server.cc Xrw-r--r--771/50 1203 Jul 7 11:49 1990 ./Makefile Xrw-r-----771/50 9757 Jul 7 11:49 1990 ./faucet.c Xrw-r--r--771/50 4241 Jun 23 04:09 1990 ./hose.c~ Xrwxr-xr-x771/50 24576 Jul 7 11:50 1990 ./hose Xrw-r--r--771/50 4041 Jul 7 11:50 1990 ./hose.c Xrw-r-----771/50 592 Jul 7 11:48 1990 ./portname.c Xrw-r--r--771/50 317 Jul 7 11:48 1990 ./portname.o Xrwxr-xr-x771/50 24576 Jul 7 11:50 1990 ./faucet Xrw-r--r--771/50 3378 Jul 7 11:50 1990 ./hose.o Xrw-r--r--771/50 1069 Jun 23 02:42 1990 ./Makefile~ Xrw-r--r--771/50 4662 Jul 7 11:50 1990 ./faucet.o Xrw-r-----771/50 377 Jul 7 11:53 1990 ./#README# Xrw-r-----771/50 371 Jul 7 11:53 1990 ./README Xrw-r--r--771/50 2917 Mar 6 22:13 1990 ./client.cc X X The 3000 is the port number to connect to. Normal users can use any Xnumber over 1023. You can also specify a service name in place of a Xnumber since the program can look it up from the services database. X The argument in ""s (argv[2] for faucet, argv[3] for hose) is the Xcommand to be connected to the socket. The flags in, out and err Xgovorn which file descriptors get connected to the socket after the Xconnection is successful. X hose is a one-shot program. It connects to the foreign server Xsocket and execs the command. faucet is an undying server. Every Xtime it recieves a connection on its socket it forks and execs a "csh X-c". faucet can be limited to one-shot by the "once" flag. X XSYNTAX X X faucet <port> <command> (in|out|err)+ [once] [verb(|ose)] [quiet] X [unix] [foreignport <port>] [foreignhost <host>] X X hose <hostname> <port> <command> (in|out|err)+ [unix] [localport <port>]} X X Host names can be be the name of the machine or (if no name is Xfound) the internet number. The individual numbers are sscanfed with X%i so 0x or 0 prefixes mean hex or octal instead of decimal for that Xone byte. X You must chose at least one of in, out, and err. The other flags Xare optional and listed below X unix.........causes the program to go into unix-domain socket mode. X hose can also be forced into unix-domain operation by X specifying -unix- as the hostname (those dashes are X part of the arg) or by being run with argv[0] as the X string "uhose" (possible by hardlinking the binary). X Port names are then treated as unix domain socket X addresses (filenames) as opposed to internet port X numbers. X localport....(only on hose) asks hose to bind to a specific local X port. X once.........(only on faucet) the faucet command will not fork, but X will exec the command, and when the command exits X you're done. X verbose|quiet (only on faucet) enables|disables the printing of X extra information such as what host and port faucet is X getting connections from. X foreignport..(only on faucet) causes faucet to refuse (close X immediately) any connection from a machine that hasn't X bound its socket to the port specified immediately X after the foreignport flag. This can be used with the X localport option of hose to perform crude X authentication. If the foreignport is <1024 then only X a foreign root user will be able to connect to your X faucet because only root can bind to a port number X below 1024. X foreignhost..(only on faucet) causes faucet to refuse (close X immediately) any connection from any machine other X than the host specified immediately after the X foreignhost flag. X X Be aware that addresses and ports can be spoofed if your network Xisn't secure (yours probably isn't). If you have PCs or other Xnon-UNIX boxes connected to the network, then it's DISGUSTINGLY easy Xfor ANYONE to spoof the network. X X X XEXAMPLES X X FAUCET HOSE X Xreef:100 % ./faucet chat "echo send X$14M and 2 airline stewardesses or Xyou'll never see Hoffa alive" Xforeignhost azalea verbose out X X reef:40 % ./hose reef chat cat in X Xrefusing connection from host 128. X227.224.61(reef.cis.ufl.edu). X X azalea:20 % ./hose reef chat cat in X X./faucet: Got connection from 128. X227.224.55(azalea.cis.ufl.edu) port X1687 XUnmatched '. X /* darn, screwed up the shell quoting */ X^C X Xreef:107 % ./faucet /tmp/blah 'echo Xsend '\'\$14M\'' and 2 airline Xstewardesses or you'\\\''ll never Xsee Hoffa alive' foreignhost azalea Xverbose out foreignport /tmp/auth unix X./faucet: foreignhost parameter makes no Xsense with UNIX domain sockets, ignoring. X /* %#@)*, bite me */ X X reef:41 % ./hose -unix- /tmp/blah cat in X X./faucet: refusing connection from port X X reef:43 % ./hose -unix- /tmp/blah cat in X localport /tmp/auth X X./faucet: Got connection from /tmp/auth X X send $14M and 2 airline stewardesses or X you'll never see Hoffa alive X X X Notice the elaborate quoting on that one. faucet+hose fork a "csh X-c " to interpret the command. The echo command had to be quoted so Xthat faucet saw: X Xecho send '$14M' and 2 airline stewardesses or you\'ll never see Hoffa alive X X faucet then performed this system call X Xexecl("/bin/csh","csh","-c",argv[2],NULL); X X and the "$14M" and "you'll" were properly quoted to survive THAT csh Xas well. Commands to hose must be similarly protected. X X Why use csh? X 1) This allows you to have pipelines and other fancy stuff inside X the command, and X 2) I don't have to write code to parse the command! X X X XBUGS X X Hoohoohoo, god knows what sort of bugs are waiting to rip your Xankles off. I'm the only one who's extensively used these. They were Xdeveloped on Sun3s and Sun4s. They have been compiled (but not Xextensively tested) on Sonys, DECstations and HPs. If your machine Xneeds different include files, start grepping and mail me the results. X X If anything is not crystal clear, check the source and mail me. XI'll try to put it in the README. X X XAUTHOR X X Robert H. Forsman Jr. <thoth@lightning.cis.ufl.edu> X former underpaid Systems Programmer X now piddly underpaid Research Assistant X University of Florida X Department of Computer X and Information Science END_OF_FILE if test 6701 -ne `wc -c <'README'`; then echo shar: \"'README'\" unpacked with wrong size! fi # end of 'README' fi if test -f 'faucet.1' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'faucet.1'\" else echo shar: Extracting \"'faucet.1'\" $4160 characters$ sed "s/^X//" >'faucet.1' <<'END_OF_FILE' X.\" faucet.1 Copyright 3/30/1992 by Robert Forsman X.TH FAUCET 1 "Mar 30 1992" X.SH NAME Xfaucet - a fixture for a BSD network pipe X.SH SYNOPSIS X\fBfaucet\fP \fIport\fP \fIcommand\fP (\fBin\fP|\fBout\fP|\fBerr\fP) X[\fBonce\fP] [\fBverbose\fP] [\fBquiet\fP] [\fBunix\fP] X[\fBforeignhost\fP \fIhost\fP] [\fBforeignport\fP \fIport\fP] X X.SH DESCRIPTION X.LP X.B faucet Xattempts to provide the functionality of pipes over the network. XIt behaves as the server end of a server\-client connection. XWhen used with X.B hose(1) Xit can function as a replacement for X.IP Xtar \-cf \- . | rsh other "cd destdir; tar -xf -" X.LP X.B faucet Xand X.B hose Xare especially useful when you don't have easy access to the Xdestination machine. X X.LP X.B faucet Xcreates a BSD socket, binds it to the X.I port Xspecified on the command line, and listens for connections. XEvery time X.B faucet Xgets a connection it forks the X.I command Xwith stdin, stdout, and/or stderr redirected according to the X.B in out err Xflags. If the X.B once Xflag is specified, X.B faucet Xwill exec(2) the X.I command Xinstead of fork(2)ing and exec(2)ing. X.B once Xmeans that the network pipe Xis only good for one shot. XThe X.B verbose Xflag specifies that X.B faucet Xshould print information about connecting hosts . This information Xincludes the numeric host address, host names, and foreign port numbers. XThe X.B quiet Xflag specifies that X.B faucet Xshould NOT print such info. X.B quiet Xis the default. The X.B unix Xflag specifies that the X.I port Xis not an internet port number or service name, but instead it is a Xfilename for a UNIX domain socket. The X.B foreignhost Xoption specifies that faucet should reject all connections that do not Xcome from the X.I host Xmachine. Similarly X.B foreignport Xspecifies that faucet should reject all connections that are not bound Xon their local machine to the X.I port Xargument. The above two options allow a crude form of authentication. XNote that on most systems only root can bind a socket to a port number Xbelow 1024. X X.SH "EXAMPLES" X.LP XThis creates a TCP\-IP socket on the local machine bound to port 3000. X.IP Xexample% faucet 3000 "tar -cf - ." out verbose X.LP XEvery time some process (from any machine) attempts to connect to Xport 3000 on this machine the X.B faucet Xprogram will fork(2) a process and the child will exec(2) a X.IP X/bin/csh -c "tar -cf - ." X.LP XThe X.B out Xoption means that the output of the child process will have been Xredirected into the new socket retrieved by the accept(2) call. X.B verbose Xmeans that faucet will print information about each new connection. X X.LP XThis creates a UNIX domain socket in the current directory X.IP Xexample% faucet u-socket "dd if=angio.pgm" out err once X.LP XThe X.B out err Xoption means that stdout and stderr will be redirected in the child Xprocess. The X.B once Xoption means that the faucet will not fork(2), but exec(2) the process Xso that only the first process can connect to the u-socket before the Xfaucet becomes unavailable. X X.SH "SEE ALSO" X.BR hose (1), X.BR socket (2), X.BR bind (2), X.BR listen (2), X.BR accept (2), X.BR services (5), X.BR gethostbyaddr (3) X X.SH "NOTES" X.LP XDoubtless there are bugs in this program, especially in the unix domain Xsocket portions. I welcome problem reports and would like to make Xthese programs as "clean" (no leftover files, sockets) as possible. X X.SH "COPYRIGHT" XCopyright (C) 1992 Robert Forsman X XThis program is free software; you can redistribute it and/or modify Xit under the terms of the GNU General Public License as published by Xthe Free Software Foundation; either version 2 of the License, or X(at your option) any later version. X XThis program is distributed in the hope that it will be useful, Xbut WITHOUT ANY WARRANTY; without even the implied warranty of XMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the XGNU General Public License for more details. X XYou should have received a copy of the GNU General Public License Xalong with this program; if not, write to the Free Software XFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. X X.SH "AUTHOR" X Robert Forsman X thoth@lightning.cis.ufl.edu X University of Florida X Department of Computer and Information Science END_OF_FILE if test 4160 -ne `wc -c <'faucet.1'`; then echo shar: \"'faucet.1'\" unpacked with wrong size! fi # end of 'faucet.1' fi if test -f 'faucet.c' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'faucet.c'\" else echo shar: Extracting \"'faucet.c'\" $9476 characters$ sed "s/^X//" >'faucet.c' <<'END_OF_FILE' X/* X X faucet.c, part of X faucet and hose: network pipe utilities X Copyright (C) 1992 Robert Forsman X X This program is free software; you can redistribute it and/or modify X it under the terms of the GNU General Public License as published by X the Free Software Foundation; either version 2 of the License, or X (at your option) any later version. X X This program is distributed in the hope that it will be useful, X but WITHOUT ANY WARRANTY; without even the implied warranty of X MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the X GNU General Public License for more details. X X You should have received a copy of the GNU General Public License X along with this program; if not, write to the Free Software X Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. X X */ X Xstatic char info[] = "faucet: a network utility for sockets\nWritten 1992 by Robert Forsman <thoth@ufl.edu>\n"; X#include <stdio.h> X#include <fcntl.h> X#include <errno.h> X#ifdef hpux X#include <signal.h> X#include <sgtty.h> X#endif X#include <sys/wait.h> X#include <sys/param.h> X#include <sys/file.h> X#include <sys/ioctl.h> X#include <sys/socket.h> X#include <sys/un.h> X#include <netinet/in.h> X#include <netdb.h> X Xint mastersocket; X#define DOSTDOUT (1<<0) X#define DOSTDIN (1<<1) X#define DOSTDERR (1<<2) X#define DOONCE (1<<3) X#define DOVERBOSE (1<<4) X#define DOUNIX (1<<5) Xlong doflags=0; Xint running=1; X Xchar *foreignhost=NULL,*foreignport=NULL; Xint foreignPORT; Xstruct in_addr foreignHOST; X Xchar *programname; Xextern int errno; Xextern char *sys_errlist[]; X X Xint name_to_inet_port(); X Xvoid nice_shutdown() X/* This procedure gets called when we are killed with one of the reasonable X signals (TERM, HUP, that kind of thing). The main while loop then X terminates and we get a chance to clean up. */ X{ X running = 0; X} X X X/* print an internet host address prettily */ Xprinthost(addr) X struct in_addr *addr; X{ X struct hostent *h; X char *s,**p; X int i; X X h = gethostbyaddr(addr, sizeof(*addr),AF_INET); X s = (h==NULL) ? NULL : h->h_name; X X printf("%d", ((u_char*)addr)[0]); X for (i=1; i<sizeof(*addr); i++) X printf(".%d",((u_char*)addr)[i]); X X printf("(%s",s?s:"name unknown"); X if (s) X for (p=h->h_aliases; *p; p++) X printf(",%s",*p); X printf(")"); X} X Xint setup_socket(name) Xchar *name; X/* This procedure creates a socket and handles retries on the inet domain. X Sockets seem to "stick" on my system (SunOS [43].x) */ X{ X int sock; X X sock = socket((doflags&DOUNIX)?AF_UNIX:AF_INET, SOCK_STREAM, 0); X /* I need a real value for the protocol eventually. IPPROTO_TCP sounds X like a good value, but what about AF_UNIX sockets? It seems to have X worked so far... */ X X if (sock <0) { X perror("opening stream socket"); X exit(1); X } X X if (!bindlocal(sock, name, (doflags&DOUNIX)?AF_UNIX:AF_INET)) { X fprintf(stderr,"%s: error binding stream socket %s (%s)", X programname,name,sys_errlist[errno]); X exit(1); X } X X listen(sock,NOFILE); X X return(sock); X} X X Xvoid waitonchild() X X{ X union wait status; X#if 0 X unsigned char reason,signal,rval; X char buf[32]; X#endif X int childpid; X X childpid = wait3(&status,WNOHANG,NULL); X /* What a pity I can't easily print out child statuses */ X#if 0 X if (childpid==-1) { X fputs(stderr,programname); X fputs(stderr,": error in wait3 while handling SIGCHLD ("); X fputs(stderr,sys_errlist[errno]); X fputs(stderr,")\n"); X return; X } X reason = status.w_status & 0xff; X if (reason==0) { X rval = reason >> 8; X if (rval!=0) { X fputs(stderr,programname); X fputs(stderr,": Child "); X sprintf(buf,"%d",childpid); fputs(stderr,buf); X fputs(stderr," gave abnormal exit code "); X sprintf(buf,"%d",rval); fputs(stderr,buf); X fputs(stderr,"\n"); X } X } else if (reason!=0177) { X signal = reason & 0x7f; X fputs(stderr,programname); X fputs(stderr,": Child "); X sprintf(buf,"%d",childpid); fputs(stderr,buf); X fputs(stderr," killed by signal "); X sprintf(buf,"%d",signal); fputs(stderr,buf); X fputs(stderr," ("); X fputs(stderr,(signal<=SIGUSR2)?signames[signal]:"bogus signal number"); X fputs(stderr,")\n"); X } X#endif X} X X Xint Xauthorize_address(sin) X struct sockaddr *sin; X{ X if (doflags&DOUNIX) { X struct sockaddr_un *srv = (struct sockaddr_un*)sin; X X if (foreignport != NULL && 0!=strcmp(foreignport, srv->sun_path)) { X if (doflags&DOVERBOSE) { X printf("%s: refusing connection from port %s\n", X programname, srv->sun_path); X } X return 0; X } X } else { X struct sockaddr_in *srv = (struct sockaddr_in*)sin; X X if (foreignhost!=NULL && X 0!=bcmp(&srv->sin_addr, X &foreignHOST, sizeof(foreignHOST))) { X if (doflags&DOVERBOSE) { X printf("refusing connection from host "); X printhost(&srv->sin_addr); X printf(".\n"); X } X return 0; X } X X if (foreignport!=NULL && foreignPORT != srv->sin_port) { X if (doflags&DOVERBOSE) { X printf("refusing connection from port %d.\n", X ntohs(srv->sin_port)); X } X return 0; X } X } X X return 1; X} X X Xmain (argc,argv) Xint argc; Xchar ** argv; X X{ X int rval,length; X struct sockaddr saddr; X struct sockaddr_in *sinp = (struct sockaddr_in*)&saddr; X struct sockaddr_un *sunp = (struct sockaddr_un*)&saddr; X X programname = argv[0]; X X if (argc<3) { X fprintf(stderr,"Usage : %s <port> <command> (in|out|err)+ [once] [verb(|ose)] [quiet] [unix] [foreignport <port>] [foreignhost <host>]\n", programname); X exit(1); X } X X /* parse trailing args */ X for (length=3; length<argc; length++) { X if (strcmp(argv[length],"in")==0) X doflags |= DOSTDIN; X else if (strcmp(argv[length],"out")==0) X doflags |= DOSTDOUT; X else if (strcmp(argv[length],"err")==0) X doflags |= DOSTDERR; X else if (strcmp(argv[length],"once")==0) X doflags |= DOONCE; X else if (strcmp(argv[length],"verbose")==0 X || strcmp(argv[length],"verb")==0) X doflags |= DOVERBOSE; X else if (strcmp(argv[length],"quiet")==0) X doflags &= ~DOVERBOSE; X else if (strcmp(argv[length],"unix")==0) X doflags |= DOUNIX; X else if (strcmp(argv[length],"foreignport")==0) { X if (length+1<argc) X foreignport=argv[++length]; X else X fprintf(stderr,"%s: foreignport requires port name or number.\n", X programname); X } else if (strcmp(argv[length],"foreignhost")==0) { X if (length+1<argc) X foreignhost=argv[++length]; X else X fprintf(stderr,"%s: foreignhost requires host name or number.\n", X programname); X } else X fprintf(stderr,"%s: Bogus extra command line flag \"%s\".\n", X programname,argv[length]); X } X X if ( ! (doflags&(DOSTDIN|DOSTDERR|DOSTDOUT)) ) { X fprintf(stderr,"%s: Need at least one {in|out|err}.\n",programname); X exit(1); X } X X if ( (doflags&DOUNIX) && foreignhost!=NULL ) { X fprintf(stderr, "%s: foreignhost parameter makes no sense with UNIX domain sockets, ignoring.\n", programname); X foreignhost = NULL; X } X X signal(SIGCHLD,waitonchild); X X mastersocket = setup_socket(argv[1]); X X signal(SIGHUP, nice_shutdown); X signal(SIGINT, nice_shutdown); X signal(SIGPIPE, nice_shutdown); X signal(SIGALRM, nice_shutdown); X signal(SIGTERM, nice_shutdown); X X if (foreignhost != NULL && !convert_hostname(foreignhost, &foreignHOST)) { X fprintf(stderr, "%s: could not translate %s to a host address\n", X programname, foreignhost); X exit(1); X } X X if (foreignport!=NULL && !(doflags&DOUNIX) && X 0 == (foreignPORT = name_to_inet_port(foreignport)) ) { X fprintf(stderr,"%s: port %s unknown.\n",programname,foreignport); X exit(1); X } X X while (running) { X X length = sizeof(saddr); X X rval = accept(mastersocket,&saddr,&length); X X if (rval<0) { X if (errno==EWOULDBLOCK) { X printf("%s: No more connections to talk to.\n",programname); X } else if (errno!=EINTR) { X fprintf(stderr,"%s: error in accept (%s).", X programname,sys_errlist[errno]); X exit(1); X } X continue; X } X X if (!authorize_address(&saddr)) { X close(rval); X continue; X } X X if ( doflags&DOVERBOSE ) { X printf("%s: Got connection from ",programname); X if ( doflags&DOUNIX ) { X printf("%s\n", sunp->sun_path); X } else { X printhost(&sinp->sin_addr); X printf(" port %d\n",ntohs(sinp->sin_port)); X } X } X X fflush(stdout); X X if ( doflags&DOONCE || fork()==0 ) { X /* child process: frob descriptors and exec */ X char *s; X X if ( (doflags&(DOONCE|DOUNIX)) == (DOONCE|DOUNIX) ) X unlink(argv[1]); X /* We don't want the unix domain socket anymore */ X X dup2(fileno(stderr),mastersocket); X ioctl(mastersocket,FIOCLEX,NULL); X /* We don't need old stderr hanging around after an exec. X The mastersocket has been closed by the dup2 */ X X if (doflags & DOSTDIN) X dup2(rval,fileno(stdin)); X if (doflags & DOSTDOUT) X dup2(rval,fileno(stdout)); X if (doflags & DOSTDERR) X dup2(rval,fileno(stderr)); X X close(rval); /* rval has been properly duplicated */ X X execl("/bin/csh","csh","-c",argv[2],NULL); X s ="exec failed\n"; X write(mastersocket,s,strlen(s)); X exit(0); X } else { X /* parent: close socket. X Signal will arrive upon death of child. */ X close(rval); X } X } X X /* clean up the socket when we're done */ X if (doflags&DOUNIX) X unlink(argv[1]); X close(mastersocket); X X} END_OF_FILE if test 9476 -ne `wc -c <'faucet.c'`; then echo shar: \"'faucet.c'\" unpacked with wrong size! fi # end of 'faucet.c' fi if test -f 'hose.1' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'hose.1'\" else echo shar: Extracting \"'hose.1'\" $3029 characters$ sed "s/^X//" >'hose.1' <<'END_OF_FILE' X.\" hose.1 Copyright 3/30/1992 by Robert Forsman X.TH HOSE 1 "Mar 30 1992" X.SH NAME Xhose - the client end of a BSD network pipe X.SH SYNOPSIS X\fBhose\fP \fIhostname\fP \fIport\fP \fIcommand\fP X(\fBin\fP|\fBout\fP|\fBerr\fP) [\fBunix\fP] [\fBlocalport\fP \fIport\fP] X X.SH DESCRIPTION X.LP X.B hose Xattempts to provide the functionality of pipes over the network. XIt behaves as the client end of a server\-client connection. XWhen used with X.B faucet(1) Xit can function as a replacement for X.IP Xtar \-cf \- . | rsh other "cd destdir; tar -xf -" X.LP X.B faucet Xand X.B hose Xare especially useful when you don't have easy access to the Xdestination machine. X X.LP X.B hose Xcreates a BSD socket and, if the X.B localport Xoption is used, binds it to the port number (or service name) Xspecified immediately afterwards. X.B hose Xthen tries to connect to the foreign machine X.I hostname Xwith foreign port X.I port X . If successful X.B hose Xredirects stdin, stdout, and/or stderr Xaccording to the X.B in out err Xflags. X.B hose Xthen exec(2)s a csh -f "\fIcommand\fP". XThe X.B unix Xflag specifies that the X.I port Xis not an internet port number or service name, but instead it is a Xfilename for a UNIX domain socket. This option may be simulated by Xusing X.B -unix- Xas the host name to connect to, or by renaming the X.B hose Xprogram to \fBuhose\fP. X X.SH "EXAMPLES" X.LP XThis will connect to port 3000 on the machine reef and connect the socket Xto the stdin of a tar command. X.IP Xexample% hose reef 3000 "tar -xf - ." in X.LP XThe command actually exec(2)ed by the X.B hose Xprogram is X.IP X/bin/csh -c "tar -xf - ." X.LP XThe X.B in Xoption means that the input of the child process will have been Xredirected into the socket connected to reef. X X.LP XThis connects to a UNIX domain socket in the current directory X.IP Xexample% hose u-socket "dd of=sample.pgm" in X.LP X X.SH "SEE ALSO" X.BR faucet (1), X.BR socket (2), X.BR bind (2), X.BR listen (2), X.BR accept (2), X.BR services (5), X.BR gethostbyaddr (3) X X.SH "NOTES" X.LP XDoubtless there are bugs in this program, especially in the unix domain Xsocket portions. I welcome problem reports and would like to make Xthese programs as "clean" (no leftover files, sockets) as possible. X X.SH "COPYRIGHT" XCopyright (C) 1992 Robert Forsman X XThis program is free software; you can redistribute it and/or modify Xit under the terms of the GNU General Public License as published by Xthe Free Software Foundation; either version 2 of the License, or X(at your option) any later version. X XThis program is distributed in the hope that it will be useful, Xbut WITHOUT ANY WARRANTY; without even the implied warranty of XMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the XGNU General Public License for more details. X XYou should have received a copy of the GNU General Public License Xalong with this program; if not, write to the Free Software XFoundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. X X.SH "AUTHOR" X Robert Forsman X thoth@lightning.cis.ufl.edu X University of Florida X Department of Computer and Information Science END_OF_FILE if test 3029 -ne `wc -c <'hose.1'`; then echo shar: \"'hose.1'\" unpacked with wrong size! fi # end of 'hose.1' fi if test -f 'hose.c' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'hose.c'\" else echo shar: Extracting \"'hose.c'\" $5611 characters$ sed "s/^X//" >'hose.c' <<'END_OF_FILE' X/* X X hose.c, part of X faucet and hose: network pipe utilities X Copyright (C) 1992 Robert Forsman X X This program is free software; you can redistribute it and/or modify X it under the terms of the GNU General Public License as published by X the Free Software Foundation; either version 2 of the License, or X (at your option) any later version. X X This program is distributed in the hope that it will be useful, X but WITHOUT ANY WARRANTY; without even the implied warranty of X MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the X GNU General Public License for more details. X X You should have received a copy of the GNU General Public License X along with this program; if not, write to the Free Software X Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. X X */ X Xstatic char info[] = "hose: a network utility for sockets\nWritten 1992 by Robert Forsman <thoth@ufl.edu>\n"; X#include <stdio.h> X#include <fcntl.h> X#ifdef hpux X#include <sgtty.h> X#endif X#include <signal.h> X#include <sys/errno.h> X#include <sys/param.h> X#include <sys/file.h> X#include <sys/ioctl.h> X#include <sys/socket.h> X#include <sys/un.h> X#include <netinet/in.h> X#include <netdb.h> X X#define DOSTDOUT (1<<0) X#define DOSTDIN (1<<1) X#define DOSTDERR (1<<2) X#define DOUNIX (1<<3) X#define DOJAM (1<<4) Xint doflags=0; Xchar *localport=NULL; Xchar *programname; Xextern int errno; Xextern char *sys_errlist[]; X X Xint name_to_inet_port(); X X Xint setup_socket(hostname,portname) Xchar *hostname; Xchar *portname; X X{ X int sock; X struct sockaddr server; X int length; X X sock = socket((doflags&DOUNIX)?AF_UNIX:AF_INET, SOCK_STREAM, 0); X if (sock <0) { X perror("opening stream socket"); X exit(1); X } X X length = sizeof(server); X X if (localport != NULL && X !bindlocal(sock, localport, (doflags&DOUNIX)?AF_UNIX:AF_INET) ) { X fprintf(stderr,"%s: error binding stream socket %s (%s)", X programname,localport,sys_errlist[errno]); X exit(1); X } X X if (doflags&DOUNIX) { X /* ignore the hostname parameter */ X ((struct sockaddr_un*)&server)->sun_family = AF_UNIX; X strcpy( ((struct sockaddr_un*)&server)->sun_path, portname); X } else { X struct sockaddr_in *svr=(struct sockaddr_in *)&server; X X ((struct sockaddr_in*)&server)->sin_family = AF_INET; X X if (!convert_hostname(hostname, &svr->sin_addr)) { X fprintf(stderr, "%s: could not translate %s to a host address\n", X programname, hostname); X exit(1); X } X X svr->sin_port = name_to_inet_port(portname); X if (svr->sin_port==0) { X fprintf(stderr,"%s: bogus port number %s\n",programname,portname); X exit(1); X } X } X X if (connect(sock,(struct sockaddr*)&server,sizeof(server)) < 0) { X perror("connecting"); X exit(1); X } X X return(sock); X} X X Xvoid endjam() X{ X doflags &= ~DOJAM; X} X X Xmain (argc,argv) X int argc; X char ** argv; X X{ X int rval,length; X int jampipe[2]; X X programname=argv[0]; X X if (argc<4) { X fprintf(stderr,"Usage : %s <hostname> <port> <command> (in|out|err)+ [unix] [localport <port>]}\n",programname); X exit(1); X } X if (strcmp(argv[1],"-unix-")==0 || strcmp(programname,"uhose")==0 ) X doflags |= DOUNIX; X for (length=4; length<argc; length++) { X if (strcmp(argv[length],"in")==0) X doflags |= DOSTDIN; X else if (strcmp(argv[length],"out")==0) X doflags |= DOSTDOUT; X else if (strcmp(argv[length],"err")==0) X doflags |= DOSTDERR; X else if (strcmp(argv[length],"unix")==0) X doflags |= DOUNIX; X else if (strcmp(argv[length],"jam")==0) X doflags |= DOJAM; X else if (strcmp(argv[length],"localport")==0) { X if (length+1<argc) X localport=argv[++length]; X else X fprintf(stderr,"%s: localport requires port name or number after.\n", X programname); X } else X fprintf(stderr,"%s: Bogus extra command line flag \"%s\".\n", X programname,argv[length]); X } X X if ( ! (doflags&(DOSTDIN|DOSTDERR|DOSTDOUT)) ) { X fprintf(stderr,"%s: Need at least one {in|out|err}.\n",programname); X exit(1); X } X X /* this wierd setup is to flood a socket with connections */ X if (doflags&DOJAM) { X signal(SIGCHLD, endjam); X if (0>pipe(jampipe)) { X perror("opening jampipe"); X exit(1); X } X } X X while ( (doflags & DOJAM) && fork() ) { X char ch; X close (jampipe[1]); X while (1==read(jampipe[0], &ch, 1)) X ; X close (jampipe[0]); X jampipe[0] = -1; X if (0>pipe(jampipe)) { X perror("opening jampipe"); X exit(1); X } X } X X if (doflags&DOJAM) X close (jampipe[0]); X X rval = setup_socket(argv[1],argv[2]); X X if (doflags&DOUNIX && localport!=NULL) X unlink(localport); X X#if 0 X if (!fork()) { X int sparefd; X char *s; X X sparefd = dup(fileno(stderr)); X ioctl(sparefd,FIOCLEX,NULL); X X if (!(doflags & DOSTDIN)) X dup2(rval,fileno(stdin)); X if (!(doflags & DOSTDOUT)) X dup2(rval,fileno(stdin)); X if (!(doflags & DOSTDERR)) X dup2(rval,fileno(stderr)); X close(rval); X X execl("/bin/cat",NULL); X s ="exec failed\n"; X write(sparefd,s,strlen(s)); X exit(1); X } X#endif X { X int sparefd; X char *s; X X sparefd = dup(fileno(stderr)); X ioctl(sparefd,FIOCLEX,NULL); X X if (doflags & DOSTDIN) X dup2(rval,fileno(stdin)); X if (doflags & DOSTDOUT) X dup2(rval,fileno(stdout)); X if (doflags & DOSTDERR) X dup2(rval,fileno(stderr)); X close(rval); X X if (doflags&DOJAM) X close (jampipe[1]); X X execl("/bin/csh","csh","-c",argv[3],NULL); X s ="exec failed\n"; X write(sparefd,s,strlen(s)); X exit(1); X } X} END_OF_FILE if test 5611 -ne `wc -c <'hose.c'`; then echo shar: \"'hose.c'\" unpacked with wrong size! fi # end of 'hose.c' fi if test -f 'portname.c' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'portname.c'\" else echo shar: Extracting \"'portname.c'\" $2973 characters$ sed "s/^X//" >'portname.c' <<'END_OF_FILE' X/* X X portname.c, part of X faucet and hose: network pipe utilities X Copyright (C) 1992 Robert Forsman X X This program is free software; you can redistribute it and/or modify X it under the terms of the GNU General Public License as published by X the Free Software Foundation; either version 2 of the License, or X (at your option) any later version. X X This program is distributed in the hope that it will be useful, X but WITHOUT ANY WARRANTY; without even the implied warranty of X MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the X GNU General Public License for more details. X X You should have received a copy of the GNU General Public License X along with this program; if not, write to the Free Software X Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. X X */ X X#include <stdio.h> X#include <fcntl.h> X#include <errno.h> X#include <sys/socket.h> X#include <sys/un.h> X#include <netdb.h> X#include <netinet/in.h> X Xint name_to_inet_port(portname) Xchar *portname; X/* This procedure converts a character string to a port number. It looks X up the service by name and if there is none, then it converts the string X to a number with sscanf */ X{ X struct servent *p; X X if (portname==NULL) X return 0; X X p = getservbyname(portname,"tcp"); X if (p!=NULL) X { X return p->s_port; X } X else X { X int port; X if (sscanf(portname,"%i",&port)!=1) X { X return 0; X } X else X return htons(port); X } X} X Xint Xconvert_hostname(name, addr) X char *name; X struct in_addr *addr; X{ X struct hostent *hp; X int len; X X hp = gethostbyname(name); X if (hp != NULL) X bcopy(hp->h_addr,addr,hp->h_length); X else X { X int count; X unsigned int a1,a2,a3,a4; X count = sscanf(name,"%i.%i.%i.%i%n", &a1, &a2, &a3, &a4, &len); X if (4!=count || 0!=name[len] ) X return 0; X addr->S_un.S_un_b.s_b1 = a1; X addr->S_un.S_un_b.s_b2 = a2; X addr->S_un.S_un_b.s_b3 = a3; X addr->S_un.S_un_b.s_b4 = a4; X } X return 1; X} X X Xint Xbindlocal(fd, name, domain) X int fd, domain; X char *name; X{ X struct sockaddr laddr; X int countdown; X int rval; X X if (domain==AF_INET) X { X struct sockaddr_in *srv = (struct sockaddr_in*)&laddr; X X srv->sin_family = AF_INET; X srv->sin_addr.s_addr = INADDR_ANY; X X srv->sin_port = name_to_inet_port(name); X X if (srv->sin_port==0) X { X fprintf(stderr, "port %s unknown\n", name); X return 0; X } X } X else X { X struct sockaddr_un *srv = (struct sockaddr_un *)&laddr; X X srv->sun_family = AF_UNIX; X strcpy(srv->sun_path, name); X } X X countdown= (domain==AF_UNIX)?1:10; X do { X rval = bind(fd, &laddr, sizeof(laddr)); X if (rval) X if (errno==EADDRINUSE && --countdown>0) X { X fprintf(stderr,"Address %s in use, sleeping 10.\n", X name); X sleep (10); X fprintf(stderr,"Trying again . . .\n"); X } X else X return 0; X } while (rval); X X return 1; X} END_OF_FILE if test 2973 -ne `wc -c <'portname.c'`; then echo shar: \"'portname.c'\" unpacked with wrong size! fi # end of 'portname.c' fi echo shar: End of archive 1 $of 1$. cp /dev/null ark1isdone MISSING="" for I in 1 ; do if test ! -f ark${I}isdone ; then MISSING="${MISSING} ${I}" fi done if test "${MISSING}" = "" ; then echo You have the archive. rm -f ark[1-9]isdone else echo You still need to unpack the following archives: echo " " ${MISSING} fi ## End of shell archive. exit 0