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Retire MINIX rarpd(8)

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Change-Id: I2d7b7edbb8fa6000ba368d156cf947e7691cf454
This commit is contained in:
David van Moolenbroek 2017-02-14 18:43:37 +00:00
parent 9cf227216d
commit 34a8cf369f
9 changed files with 6 additions and 491 deletions
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2
distrib/sets/lists/minix-base/mi
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@ -482,7 +482,7 @@
./usr/bin/ps minix-base obsolete
./usr/bin/pwhash minix-base
./usr/bin/ramdisk minix-base
./usr/bin/rarpd minix-base
./usr/bin/rarpd minix-base obsolete
./usr/bin/rawspeed minix-base
./usr/bin/rcp minix-base obsolete
./usr/bin/readlink minix-base

2
distrib/sets/lists/minix-debug/mi
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@ -383,7 +383,7 @@
./usr/libdata/debug/usr/bin/pwhash.debug minix-debug debug
./usr/libdata/debug/usr/bin/ramdisk.debug minix-debug debug
./usr/libdata/debug/usr/bin/ranlib.debug minix-debug debug
./usr/libdata/debug/usr/bin/rarpd.debug minix-debug debug
./usr/libdata/debug/usr/bin/rarpd.debug minix-debug debug,obsolete
./usr/libdata/debug/usr/bin/rawspeed.debug minix-debug debug
./usr/libdata/debug/usr/bin/readelf.debug minix-debug debug
./usr/libdata/debug/usr/bin/recwave.debug minix-debug debug

4
distrib/sets/lists/minix-man/mi
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@ -3277,7 +3277,7 @@
./usr/man/man5/dhcp.conf.5 minix-man obsolete
./usr/man/man5/dir.5 minix-man obsolete
./usr/man/man5/editrc.5 minix-man
./usr/man/man5/ethers.5 minix-man
./usr/man/man5/ethers.5 minix-man obsolete
./usr/man/man5/fstab.5 minix-man
./usr/man/man5/ftpchroot.5 minix-man
./usr/man/man5/ftpd.conf.5 minix-man
@ -3432,7 +3432,7 @@
./usr/man/man8/printroot.8 minix-man
./usr/man/man8/pwd_mkdb.8 minix-man
./usr/man/man8/pwdauth.8 minix-man obsolete
./usr/man/man8/rarpd.8 minix-man
./usr/man/man8/rarpd.8 minix-man obsolete
./usr/man/man8/rawspeed.8 minix-man
./usr/man/man8/rc.8 minix-man
./usr/man/man8/rc.d.8 minix-man

2
minix/commands/Makefile
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@ -18,7 +18,7 @@ SUBDIR= at backup \
minix-service mount mt netconf \
prep printroot \
profile progressbar \
ramdisk rarpd rawspeed readclock \
ramdisk rawspeed readclock \
remsync rget rlogin \
rotate setup \
slip spell sprofalyze sprofdiff srccrc \

4
minix/commands/rarpd/Makefile
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@ -1,4 +0,0 @@
PROG= rarpd
MAN= rarpd.8
.include <bsd.prog.mk>

75
minix/commands/rarpd/rarpd.8
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@ -1,75 +0,0 @@
.TH RARPD 8
.SH NAME
rarpd \- reverse address resolution protocol daemon
.SH SYNOPSIS
.B rarpd
.RB [ \-d [\fIlevel\fR]]
.I network-name
\&...
.SH DESCRIPTION
.de SP
.if t .sp 0.4
.if n .sp
..
.B Rarpd
listens on the given networks for broadcast packets asking for reverse address
resolution. These packets are sent by hosts at boot time to find out their
IP address.
.B Rarpd
looks up the six octet ethernet number in the
.B /etc/ethers
file finding a host name. This name is translated to the IP address of the
host by a DNS lookup. The IP address is then sent to the host.
.PP
Under MINIX 3 the program forks as needed to give each network its own server.
Under Minix-vmd all networks are handled in the same program using async I/O.
.SS "Private Ethernet Addresses"
For VU practical work, where students have to create their own IP stack
starting at the bottom with RARP, this implementation recognizes Ethernet
addresses starting with octet 0x76 as special. The next octet is used as a
additional host number and the next and last four octets as an IP address
that this Ethernet address is additional for. The IP address is translated
back to a name, and the first component of that name gets a dash and the
additional host number added to it. That hostname is then looked up and its
IP address returned in a RARP reply. Example:
.PP
.RS
.ta +\w'flotsam-3.example.commmm'u
76:3:c0:a8:e7:fa Additional 3, IP 192.168.231.250
.SP
flotsam.example.com Reverse lookup on 192.168.231.250
.SP
flotsam-3.example.com Splicing in additional number
.SP
192.168.231.42 Forward lookup
.RE
.PP
In this example a RARP query for 76:3:c0:a8:e7:fa gets 192.168.231.42 as reply.
.SH OPTIONS
.TP
.BR \-d [\fIlevel\fP]
Turns on debugging messages at the given level, by default 1. At level 1 you
will be shown what answers are sent, and at level 2 or higher you will be told
about queries from unknown hosts or host on the wrong network.
The debug level can also be increased by 1 at runtime by sending signal
.B SIGUSR1
or turned off (set to 0) with
.BR SIGUSR2 .
.SH "SEE ALSO"
.BR ifconfig (8),
.BR ethers (5),
.BR hosts (5),
.BR inet (8),
.BR boot (8),
.BR dhcpd (8),
.BR irdpd (8),
.BR inetd (8),
.BR nonamed (8).
.SH NOTES
A "network name" is the device name of the IP device of a network, i.e.
.BR ip0 ,
.BR ip1 ", ..."
.PP
The RARP protocol has gone out of fashion in favour of DHCP.
.SH AUTHOR
Kees J. Bot (kjb@cs.vu.nl)

370
minix/commands/rarpd/rarpd.c
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@ -1,370 +0,0 @@
/*
rarpd.c
Created: Nov 12, 1992 by Philip Homburg
Changed: May 13, 1995 by Kees J. Bot
Rewrite to handle multiple ethernets.
Changed: Jul 18, 1995 by Kees J. Bot
Do RARP requests (formerly inet's job)
Changed: Dec 14, 1996 by Kees J. Bot
Query the netmask
Changed: Dec 11, 2000 by Kees J. Bot
Dressed down to be only a RARP server, giving the floor to DHCP
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <sys/asynchio.h>
#include <net/hton.h>
#include <net/gen/socket.h>
#include <netdb.h>
#include <net/gen/in.h>
#include <net/gen/inet.h>
#include <net/gen/ether.h>
#include <net/gen/eth_io.h>
#include <net/gen/if_ether.h>
#include <net/gen/ip_io.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#define MAX_RARP_RETRIES 5
#define RARP_TIMEOUT 5
#undef HTONS
#define HTONS htons
typedef struct rarp46
{
ether_addr_t a46_dstaddr;
ether_addr_t a46_srcaddr;
ether_type_t a46_ethtype;
u16_t a46_hdr, a46_pro;
u8_t a46_hln, a46_pln;
u16_t a46_op;
ether_addr_t a46_sha;
u8_t a46_spa[4];
ether_addr_t a46_tha;
u8_t a46_tpa[4];
char a46_padding[ETH_MIN_PACK_SIZE - (4*6 + 2*4 + 4*2 + 2*1)];
} rarp46_t;
#define ETH_RARP_PROTO 0x8035
#define RARP_ETHERNET 1
#define RARP_REQUEST 3
#define RARP_REPLY 4
static char *program;
static unsigned debug;
#define between(a, c, z) ((unsigned) (c) - (a) <= (unsigned) (z) - (a))
static void report(const char *label)
{
fprintf(stderr, "%s: %s: %s\n", program, label, strerror(errno));
}
static void fatal(const char *label)
{
report(label);
exit(1);
}
static void *allocate(size_t size)
{
void *mem;
if ((mem= malloc(size)) == NULL) fatal("Can't allocate memory");
return mem;
}
static char *ethdev(int n)
{
static char an_ethdev[]= "/dev/ethNNN";
sprintf(an_ethdev + sizeof(an_ethdev)-4, "%d", n);
return an_ethdev;
}
static char *ipdev(int n)
{
static char an_ipdev[]= "/dev/ipNNN";
sprintf(an_ipdev + sizeof(an_ipdev)-4, "%d", n);
return an_ipdev;
}
typedef struct ethernet {
int n; /* Network number. */
int eth_fd; /* Open low level ethernet device. */
ether_addr_t eth_addr; /* Ethernet address of this net. */
char packet[ETH_MAX_PACK_SIZE]; /* Incoming packet. */
ipaddr_t ip_addr; /* IP address of this net. */
ipaddr_t ip_mask; /* Associated netmask. */
} ethernet_t;
static ethernet_t *ethernets;
static void onsig(int sig)
{
switch (sig) {
case SIGUSR1: debug++; break;
case SIGUSR2: debug= 0; break;
}
}
static void rarp_reply(ethernet_t *ep, char *hostname, ipaddr_t ip_addr,
ether_addr_t eth_addr)
{
rarp46_t rarp46;
/* Construct a RARP reply packet and send it. */
rarp46.a46_dstaddr= eth_addr;
rarp46.a46_hdr= HTONS(RARP_ETHERNET);
rarp46.a46_pro= HTONS(ETH_IP_PROTO);
rarp46.a46_hln= 6;
rarp46.a46_pln= 4;
rarp46.a46_op= HTONS(RARP_REPLY);
rarp46.a46_sha= ep->eth_addr;
memcpy(rarp46.a46_spa, &ep->ip_addr, sizeof(ipaddr_t));
rarp46.a46_tha= eth_addr;
memcpy(rarp46.a46_tpa, &ip_addr, sizeof(ipaddr_t));
if (debug >= 1) {
printf("%s: Replying %s (%s) to %s\n",
ethdev(ep->n), inet_ntoa(*(struct in_addr *)&ip_addr), hostname,
ether_ntoa(&eth_addr));
}
(void) write(ep->eth_fd, &rarp46, sizeof(rarp46));
}
static int addhostname(char *addname, char *hostname, int n)
{
/* Create an additional hostname for a given hostname by adding "-n" to
* the first part. E.g. given "wombat.cs.vu.nl" and n=2 return
* "wombat-2.cs.vu.nl". This is useful for VU practical work where
* people get a few extra ethernet addresses on a machine and are asked
* to build a TCP/IP stack on it.
*/
char *dot;
if (strlen(hostname) + 4 >= 1024) return 0;
if ((dot= strchr(hostname, '.')) == NULL) dot= strchr(hostname, 0);
sprintf(addname, "%.*s-%d%s", (dot - hostname), hostname, n, dot);
return 1;
}
static void usage(void)
{
fprintf(stderr, "Usage: %s [-d[level]] network-name ...\n", program);
exit(1);
}
static int ifname2n(const char *name)
{
/* Translate an interface name, ip0, ip1, etc, to a number. */
const char *np;
char *end;
unsigned long n;
np= name;
if (*np++ != 'i' || *np++ != 'p') usage();
n= strtoul(np, &end, 10);
if (end == np || *end != 0) usage();
if (n >= 1000) {
fprintf(stderr, "%s: Network number of \"%s\" is a bit large\n",
program, name);
exit(1);
}
return n;
}
int main(int argc, char **argv)
{
int i;
ethernet_t *ep;
nwio_ethopt_t ethopt;
nwio_ethstat_t ethstat;
char hostname[1024];
struct hostent *hostent;
struct sigaction sa;
nwio_ipconf_t ipconf;
asynchio_t asyn;
ssize_t n;
ipaddr_t ip_addr;
rarp46_t rarp46;
int fd;
int n_eths;
program= argv[0];
asyn_init(&asyn);
debug= 0;
i= 1;
while (i < argc && argv[i][0] == '-') {
char *opt= argv[i++]+1;
if (opt[0] == '-' && opt[1] == 0) break; /* -- */
while (*opt != 0) switch (*opt++) {
case 'd':
debug= 1;
if (between('0', *opt, '9')) debug= strtoul(opt, &opt, 10);
break;
default:
usage();
}
}
if ((n_eths= (argc - i)) == 0) usage();
#if __minix_vmd
/* Minix-vmd can handle all nets at once using async I/O. */
ethernets= allocate(n_eths * sizeof(ethernets[0]));
for (i= 0; i < n_eths; i++) {
ethernets[i].n= ifname2n(argv[argc - n_eths + i]);
}
#else
/* Minix forks n-1 times to handle each net in a process each. */
for (i= 0; i < n_eths; i++) {
if (i+1 < n_eths) {
switch (fork()) {
case -1: fatal("fork()");
case 0: break;
default: continue;
}
}
ethernets= allocate(1 * sizeof(ethernets[0]));
ethernets[0].n= ifname2n(argv[argc - n_eths + i]);
}
n_eths= 1;
#endif
sa.sa_handler= onsig;
sigemptyset(&sa.sa_mask);
sa.sa_flags= 0;
sigaction(SIGUSR1, &sa, NULL);
sigaction(SIGUSR2, &sa, NULL);
for (i= 0; i < n_eths; i++) {
ep= &ethernets[i];
if ((ep->eth_fd= open(ethdev(ep->n), O_RDWR)) < 0) fatal(ethdev(ep->n));
if (ioctl(ep->eth_fd, NWIOGETHSTAT, &ethstat) < 0) {
fprintf(stderr, "%s: %s: Unable to get eth statistics: %s\n",
program, ethdev(ep->n), strerror(errno));
exit(1);
}
ep->eth_addr= ethstat.nwes_addr;
if (debug >= 1) {
printf("%s: Ethernet address is %s\n",
ethdev(ep->n), ether_ntoa(&ep->eth_addr));
}
ethopt.nweo_flags= NWEO_COPY | NWEO_EN_LOC | NWEO_EN_BROAD |
NWEO_TYPESPEC;
ethopt.nweo_type= HTONS(ETH_RARP_PROTO);
if (ioctl(ep->eth_fd, NWIOSETHOPT, &ethopt) < 0) {
fprintf(stderr, "%s: %s: Unable to set eth options: %s\n",
program, ethdev(ep->n), strerror(errno));
exit(1);
}
/* What are my address and netmask? */
if ((fd= open(ipdev(ep->n), O_RDWR)) < 0) fatal(ipdev(ep->n));
if (ioctl(fd, NWIOGIPCONF, &ipconf) < 0) fatal(ipdev(ep->n));
ep->ip_addr= ipconf.nwic_ipaddr;
ep->ip_mask= ipconf.nwic_netmask;
close(fd);
if (debug >= 1) {
printf("%s: IP address is %s / ",
ipdev(ep->n), inet_ntoa(*(struct in_addr *)&ep->ip_addr));
printf("%s\n", inet_ntoa(*(struct in_addr *)&ep->ip_mask));
}
}
/* Wait for RARP requests, reply, repeat. */
for(;;) {
fflush(NULL);
/* Wait for a RARP request. */
for (i= 0; i < n_eths; i++) {
ep= &ethernets[i];
n= asyn_read(&asyn, ep->eth_fd, ep->packet, sizeof(ep->packet));
if (n != -1) break;
if (errno != EINPROGRESS) {
report(ethdev(ep->n));
sleep(10);
}
}
/* RARP request? */
if (i < n_eths
&& n >= sizeof(rarp46)
&& (memcpy(&rarp46, ep->packet, sizeof(rarp46)), 1)
&& rarp46.a46_hdr == HTONS(RARP_ETHERNET)
&& rarp46.a46_pro == HTONS(ETH_IP_PROTO)
&& rarp46.a46_hln == 6
&& rarp46.a46_pln == 4
&& rarp46.a46_op == HTONS(RARP_REQUEST)
) {
if ((ether_ntohost(hostname, &rarp46.a46_tha) == 0
|| (rarp46.a46_tha.ea_addr[0] == 'v'
&& (memcpy(&ip_addr, rarp46.a46_tha.ea_addr+2, 4), 1)
&& (hostent= gethostbyaddr((char*) &ip_addr,
4, AF_INET)) != NULL
&& addhostname(hostname, hostent->h_name,
rarp46.a46_tha.ea_addr[1])))
&& (hostent= gethostbyname(hostname)) != NULL
&& hostent->h_addrtype == AF_INET
) {
/* Host is found in the ethers file and the DNS, or the
* ethernet address denotes a special additional address
* used for implementing a TCP/IP stack in user space.
*/
for (i= 0; hostent->h_addr_list[i] != NULL; i++) {
memcpy(&ip_addr, hostent->h_addr_list[i], sizeof(ipaddr_t));
/* Check if the address is on this network. */
if (((ip_addr ^ ep->ip_addr) & ep->ip_mask) == 0) break;
}
if (hostent->h_addr_list[i] != NULL) {
rarp_reply(ep, hostname, ip_addr, rarp46.a46_tha);
} else {
if (debug >= 2) {
printf("%s: Host '%s' (%s) is on the wrong net\n",
ethdev(ep->n),
hostname, ether_ntoa(&rarp46.a46_tha));
}
}
} else {
if (debug >= 2) {
printf("%s: RARP request from unknown host '%s'\n",
ethdev(ep->n), ether_ntoa(&rarp46.a46_tha));
}
}
}
/* Wait for another request. */
if (asyn_wait(&asyn, 0, NULL) < 0) {
report("asyn_wait()");
sleep(10);
}
}
}

2
minix/man/man5/Makefile
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@ -1,4 +1,4 @@
MAN= boot.cfg.5 configfile.5 crontab.5 ethers.5 \
MAN= boot.cfg.5 configfile.5 crontab.5 \
fstab.5 keymap.5 \
passwd.5 rhosts.5 statvfs.5 \
termcap.5 ttytab.5 TZ.5 utmp.5 \

36
minix/man/man5/ethers.5
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@ -1,36 +0,0 @@
.TH ETHERS 5
.SH NAME
ethers \- ethernet address to hostname database
.SH SYNOPSIS
.B /etc/ethers
.SH DESCRIPTION
The ethers database translates ethernet addresses to hostnames for use by
the RARP daemon (see
.BR rarpd (8).)
.B /etc/ethers
may look like this:
.PP
.RS
.ta +20n +10n
0:0:c0:a:77:23 flotsam
.br
0:0:c0:a:68:ce jetsam
.RE
.PP
The six octet ethernet numbers must be entered as shown above, the hex
constants must use lowercase letters and may not have leading zeros.
Comments are marked with '#'.
.PP
See
.BR rarpd (8)
on why you shouldn't list Sun hosts in this file.
.SH FILES
.TP 15n
/etc/ethers
Ethernet addresses database.
.SH "SEE ALSO"
.BR hosts (5),
.BR rarpd (8),
.BR boot (8).
.SH AUTHOR
Kees J. Bot (kjb@cs.vu.nl)