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BOOTPCMD.C
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C/C++ Source or Header
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1991-05-31
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17KB
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707 lines
/*************************************************/
/* Center for Information Technology Integration */
/* The University of Michigan */
/* Ann Arbor */
/* */
/* Dedicated to the public domain. */
/* Send questions to info@citi.umich.edu */
/* */
/* BOOTP is documented in RFC 951 and RFC 1048 */
/*************************************************/
#include <stdio.h>
#include <sys\types.h>
#include <sys\stat.h>
#include <time.h>
#include <ctype.h>
#ifdef ANSIPROTO
#include <stdarg.h>
#endif
#include "global.h"
#include "config.h"
#include "cmdparse.h"
#include "bootpd.h"
#include "netuser.h"
#include "iface.h"
#include "udp.h"
#include "arp.h"
#define BP_DEFAULT_TAB "bootptab"
#define BP_DEFAULT_LOG "bootplog"
#define BP_DEFAULT_DIR "bpfiles"
#define BP_DEFAULT_FILE "boot"
static char *bootptab = BP_DEFAULT_TAB;
static FILE *bootfp; /* bootptab fp */
static long modtime; /* last modification time of bootptab */
static char bootplog[64] = BP_DEFAULT_LOG;
static int LogInFile = 0; /* Should bp_log log in a file? */
static int LogOnScreen = 0; /* Should bp_log log on screen? */
static char *line; /* line buffer for reading bootptab */
static int linenum; /* current ilne number in bootptab */
extern int Nhosts; /* number of hosts in host structure */
extern struct host hosts[MHOSTS];
extern char homedir[64]; /* bootfile homedirectory */
extern char defaultboot[64]; /* default file to boot */
extern int32 bp_DefaultDomainNS[BP_MAXDNS]; /* default domain name server */
extern int Nhosts;
extern struct udp_cb *Bootpd_cb;
static int bp_Homedir __ARGS((int argc,char *argv[],void *p));
static int bp_DefaultFile __ARGS((int argc,char *argv[],void *p));
static int bp_DynamicRange __ARGS((int argc,char *argv[],void *p));
static int bp_donothing __ARGS((int argc,char *argv[],void *p));
static int bp_Host __ARGS((int argc,char *argv[],void *p));
static int bp_rmHost __ARGS((int argc,char *argv[],void *p));
static int bp_DomainNS __ARGS((int argc,char *argv[],void *p));
static int bp_Start __ARGS((int argc,char *argv[],void *p));
static int bp_Stop __ARGS((int argc,char *argv[],void *p));
static int bp_logFile __ARGS((int argc,char *argv[],void *p));
static int bp_logScreen __ARGS((int argc,char *argv[],void *p));
void bootpd __ARGS((struct iface *iface, struct udp_cb *sock, int cnt));
static struct cmds BootpdCmds[] = {
"", bp_donothing, 0, 0, NULLCHAR,
"start", bp_Start, 0, 0, NULLCHAR,
"stop", bp_Stop, 0, 0, NULLCHAR,
"dns", bp_DomainNS, 0, 0, NULLCHAR,
"dynip", bp_DynamicRange, 0, 0, NULLCHAR,
"host", bp_Host, 0, 0, NULLCHAR,
"rmhost", bp_rmHost, 0, 0, NULLCHAR,
"homedir", bp_Homedir, 0, 0, NULLCHAR,
"defaultfile", bp_DefaultFile, 0, 0, NULLCHAR,
"logfile", bp_logFile, 0, 0, NULLCHAR,
"logscreen", bp_logScreen, 0, 0, NULLCHAR,
NULLCHAR, NULLFP, 0, 0, NULLCHAR
};
int
bootpdcmd (argc, argv, p)
int argc;
char *argv[];
void *p;
{
return subcmd (BootpdCmds, argc, argv, p);
}
/* Start up bootp service */
static int
bp_Start (argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct socket lsock;
time_t tloc;
char *usage = "bootpd start\n";
if (argc != 1) {
tprintf (usage);
return (-1);
}
time(&tloc);
bp_log ("\n\n####BOOTP server starting at %s\n", ctime(&tloc));
lsock.address = INADDR_ANY;
lsock.port = IPPORT_BOOTPS;
/* This way is better than recvfrom because it passes the iface in bootpd call */
/* Listen doesn't work for datagrams. */
if (Bootpd_cb == NULLUDP) {
if ((Bootpd_cb = open_udp(&lsock, bootpd)) == NULLUDP) {
tprintf ("bootpd: can't open_udp\n");
return (-1);
}
}
/*
* Read the bootptab file once immediately upon startup.
*/
da_init();
readtab();
return (0);
}
/* Stop bootp service */
static int
bp_Stop (argc, argv, p)
int argc;
char *argv[];
void *p;
{
time_t now;
char *usage = "bootpd stop\n";
if (argc != 1) {
tprintf (usage);
return -1;
}
time (&now);
Nhosts = 0;
da_shut();
readtab_shut();
del_udp (Bootpd_cb);
Bootpd_cb = NULLUDP;
bp_log ("Bootpd shutdown %s", ctime (&now));
return (0);
};
static int
bp_logFile (argc, argv, p)
int argc;
char *argv[];
void *p;
{
int i;
time_t now;
char *usage = "bootpd logfile [<file_name> | default] [on | off] \n";
time (&now);
if (argc == 1) {
if (LogInFile)
tprintf ("Bootpd logging to file '%s' turned on.\n", bootplog);
else
tprintf ("Bootpd logging to file '%s' turned off.\n", bootplog);
}
else {
for (i = 1; i < argc; i++) {
if (strcmp ("?", argv[i]) == 0)
tprintf (usage);
else if (strcmp ("off", argv[i]) == 0) {
bp_log ("Stopping file logging at %s", ctime(&now));
LogInFile = 0;
}
else if (strcmp ("on", argv[i]) == 0) {
LogInFile = 1;
bp_log ("Starting file logging at %s", ctime(&now));
}
else if (strcmp ("default", argv[i]) == 0) {
strcpy (bootplog, BP_DEFAULT_LOG);
bp_log ("File for logging set to %s\n", bootplog);
}
else {
strcpy (bootplog, argv[1]);
bp_log ("File for logging set to %s\n", bootplog);
}
}
}
return 0;
}
static int
bp_logScreen (argc, argv, p)
int argc;
char *argv[];
void *p;
{
char *usage = "bootpd logscreen [on | off]\n";
if (argc == 1)
if (LogOnScreen)
tprintf ("Bootpd logging on screen turned on.\n");
else
tprintf ("Bootpd logging on screen turned off.\n");
else if (argc == 2) {
if (strcmp ("on", argv[1]) == 0)
LogOnScreen = 1;
else if (strcmp ("off", argv[1]) == 0)
LogOnScreen = 0;
else tprintf (usage);
}
else tprintf (usage);
return 0;
}
static int
bp_DomainNS (argc, argv, p)
int argc;
char *argv[];
void *p;
{
int a0, a1, a2, a3;
int i;
char *usage = "bootpd dns [<IP addr of domain name server>...]\n";
if (argc == 1) {
tprintf ("Bootp domain name servers: ");
for (i=0; (i < BP_MAXDNS) && (bp_DefaultDomainNS[i] != 0); i++)
tprintf (" %s", inet_ntoa (bp_DefaultDomainNS[i]));
tprintf ("\n");
return (0);
}
if (argc > 1) {
if ((argc == 2) && (strcmp ("?", argv[1]) == 0)) {
tprintf (usage);
return 0;
}
/* A list of name servers has been given */
/* reset the domain name server list */
for (i= 0; i < BP_MAXDNS; i++)
bp_DefaultDomainNS[i] = 0;
/* get ip address */
for (i = 1; (i < argc) && (i < BP_MAXDNS); i++) {
if (4 != sscanf (argv[i], "%d.%d.%d.%d", &a0, &a1, &a2, &a3)) {
tprintf("bad internet address: %s\n", argv[1], linenum);
return -1;
}
bp_DefaultDomainNS[i-1] = aton(argv[i]);
}
}
/* record for the loggers sake */
bp_log ("Bootp domain name servers: ");
for (i=0; (i < BP_MAXDNS) && (bp_DefaultDomainNS[i] != 0); i++)
bp_log (" %s", inet_ntoa (bp_DefaultDomainNS[i]));
bp_log ("\n");
return 0;
}
static int
bp_rmHost (argc, argv, p)
int argc;
char *argv[];
void *p;
{
int i;
struct host *hp = NULLHOST;
struct host *cp = NULLHOST;
char *usage = "bootpd rmhost <host name>\n";
if (argc == 2) {
/* Find the host record */
for (i=0; i < Nhosts; i++) {
if (strcmp (hosts[i].name, argv[1]) == 0) {
hp = &(hosts[i]);
break;
}
}
/* Return if not found */
if (hp == NULLHOST) {
tprintf ("Host %s not in host tables.\n", argv[1]);
return -1;
}
bp_log ("Host %s removed from host table\n", hp->name);
cp = &(hosts [Nhosts - 1]);
if (hp < cp)
memcpy ((char *) hp, (char *) cp, sizeof (struct host));
Nhosts--;
return 0;
}
else tprintf (usage);
return 0;
}
/*
* Printout the hosts table.
*/
static void
dumphosts()
{
int i;
struct host *hp;
struct arp_type *at;
tprintf ("\n\nStatus of host table\n");
if (Nhosts == 0) {
tprintf (" No hosts in host table\n");
return;
}
for (i = 0; i <= Nhosts-1; i++) {
hp = &hosts[i];
at = &Arp_type[hp->htype];
tprintf ("%s %s %s %s '%s'\n",
hp->name, ArpNames[hp->htype], (*at->format)(bp_ascii, hp->haddr),
inet_ntoa ((int32)hp->iaddr.s_addr),
hp->bootfile);
}
}
static int
bp_Host (argc, argv, p)
int argc;
char *argv[];
void *p;
{
struct host *hp;
int a0, a1, a2, a3;
struct arp_type *at;
char *usage = "bootpd host [<hostname> <hardware type> <hardware addr> <ip addr> [boot file]]\n";
switch (argc) {
case 1:
dumphosts();
break;
case 5:
case 6:
hp = &hosts[Nhosts];
/* get host name */
strncpy (hp->name, argv[1], sizeof (hp->name));
/* get hardware type */
/* This code borrowed from Phil Karn's arpcmd.c */
/* This is a kludge. It really ought to be table driven */
switch(tolower(argv[2][0])){
case 'n': /* Net/Rom pseudo-type */
hp->htype = ARP_NETROM;
break;
case 'e': /* "ether" */
hp->htype = ARP_ETHER;
break;
case 'a': /* "ax25" */
hp->htype = ARP_AX25;
break;
case 'm': /* "mac appletalk" */
hp->htype = ARP_APPLETALK;
break;
default:
tprintf("unknown hardware type \"%s\"\n",argv[2]);
return -1;
}
at = &Arp_type[hp->htype];
if(at->scan == NULLFP){
return 1;
}
/* Destination address */
(*at->scan)(hp->haddr,argv[3]);
/* get ip address */
if (4 != sscanf (argv[4], "%d.%d.%d.%d", &a0, &a1, &a2, &a3))
{
tprintf("bad internet address: %s\n", argv[1], linenum);
return (0);
}
hp->iaddr.s_addr = aton(argv[4]);
/* get the bootpfile */
if (argc == 6) strncpy (hp->bootfile, argv[5], sizeof (hp->bootfile));
else hp->bootfile[0] = 0;
bp_log ("Host added: %s %s %s %s '%s'\n",
hp->name, ArpNames[hp->htype], (*at->format)(bp_ascii, hp->haddr),
inet_ntoa ((int32)hp->iaddr.s_addr),
hp->bootfile);
Nhosts++;
break;
default:
tprintf (usage);
break;
}
return 0;
}
static int
bp_Homedir (argc, argv, p)
int argc;
char *argv[];
void *p;
{
char *usage = "bootpd homedir [<name of home directory> | default]\n";
if (argc == 1)
tprintf ("Bootp home directory: '%s'\n", homedir);
else if (argc == 2) {
if (strcmp (argv[1], "?") == 0)
tprintf (usage);
else if (strcmp (argv[1], "default") == 0) {
strcpy (homedir, BP_DEFAULT_DIR);
bp_log ("Bootp home directory set to: '%s'\n", homedir);
}
else {
strcpy (homedir, argv[1]);
bp_log ("Bootp home directory set to: '%s'\n", homedir);
}
}
else tprintf (usage);
return (0);
};
static int
bp_DefaultFile (argc, argv, p)
int argc;
char *argv[];
void *p;
{
char *usage = "bootpd defaultfile [<name of default boot file> | default]\n";
if (argc == 1)
tprintf ("Bootp default boot file: '%s'\n", defaultboot);
else if (argc == 2) {
if (strcmp (argv[1], "?") == 0)
tprintf (usage);
else if (strcmp (argv[1], "default") == 0)
strcpy (defaultboot, BP_DEFAULT_FILE);
else {
strcpy (defaultboot, argv[1]);
bp_log ("Bootp default boot file set to: '%s'\n", defaultboot);
}
}
else
tprintf (usage);
return (0);
};
static int
bp_DynamicRange (argc, argv, p)
int argc;
char *argv[];
void *p;
{
int i0, i1, i2, i3;
int32 start, end;
struct iface *iface;
char *usage = "bootpd dynip [<net name> | <netname> <IP address> <IP address> | <netname> off]\n";
if (argc == 1) {
da_status (NULLIF);
return 0;
}
if ((argc == 2) && (strcmp ("?", argv[1]) == 0)) {
tprintf (usage);
return 0;
}
/* get the interface */
iface = if_lookup (argv[1]);
if (iface == NULLIF) {
tprintf ("network '%s' not found\n", argv[1]);
return (-1);
}
if (argc == 2) {
da_status (iface);
return 0;
}
if (argc == 3) {
if (strcmp ("off", argv[2]) == 0)
da_done_net (iface);
else tprintf (usage);
}
else if (argc == 4) {
/* get ip address */
/* check the ip address - isaddr isn't a ka9q function */
if ((4 != sscanf (argv[2], "%d.%d.%d.%d", &i0, &i1, &i2, &i3)) ||
(i0 > 255) || (i1 > 255) || (i2 > 255) || (i3 > 255)
)
{
tprintf("bad internet address: %s\n", argv[2], linenum);
return (-1);
}
if ((4 != sscanf (argv[3], "%d.%d.%d.%d", &i0, &i1, &i2, &i3)) ||
(i0 > 255) || (i1 > 255) || (i2 > 255) || (i3 > 255)
)
{
tprintf("bad internet address: %s\n", argv[3], linenum);
return (-1);
}
start = aton(argv[2]);
end = aton(argv[3]);
da_serve_net (iface, start, end);
}
else {
tprintf (usage);
return (0);
}
return (0);
};
static int
bp_donothing (argc, argv, p)
int argc;
char *argv[];
void *p;
{
return (0);
}
/*
* Read bootptab database file. Avoid rereading the file if the
* write date hasn't changed since the last time we read it.
*/
int
readtab()
{
struct stat st;
/* If the file hasn't been opened, open it. */
if (bootfp == 0) {
if ((bootfp = fopen(bootptab, "r")) == NULLFILE) {
bp_log("Can't open bootptab file: %s\n", bootptab);
return (-1);
}
}
/* Only reread if modified */
stat (bootptab, &st);
if (st.st_mtime == modtime && st.st_nlink) {
return (0); /* hasnt been modified or deleted yet */
}
/* It's been changed, reread. */
if ((bootfp = fopen(bootptab, "r")) == NULLFILE) {
bp_log("Can't open %s\n", bootptab);
return (-1);
}
fstat(fileno(bootfp), &st);
bp_log("(re)reading %s\n", bootptab);
modtime = st.st_mtime;
/*
* read and parse each line in the file.
*/
line = mallocw(BUFSIZ);
while (fgets(line, BUFSIZ, bootfp) != NULLCHAR) {
linenum++;
if ((line[0] == 0) || (line[0] == '#') || (line[0] == ' '))
continue;
if (cmdparse (BootpdCmds, line, NULL) == -1)
continue;
}
fclose(bootfp);
free (line);
return (0);
}
void
readtab_shut()
{
modtime = 0;
}
/*
* log an error message
*
*/
#if defined(ANSIPROTO)
void
bp_log(char *fmt,...)
{
FILE *fp;
va_list ap;
if (LogOnScreen) {
va_start(ap,fmt);
vprintf(fmt, ap);
va_end(ap);
fflush (stdout);
}
if (LogInFile) {
if ((fp = fopen(bootplog, "a+")) == NULL) {
tprintf ("Cannot open bootplog.\n");
return;
}
va_start(ap,fmt);
vfprintf(fp, fmt, ap);
va_end(ap);
fflush(fp);
fclose(fp);
}
}
#else
void
bp_log(fmt, argv1, argv2, argv3, argv4, argv5, argv6, argv7, argv8, argv9, argv10)
char *fmt;
char *argv1;
char *argv2;
char *argv3;
char *argv4;
char *argv5;
char *argv6;
char *argv7;
char *argv8;
char *argv9;
char *argv10;
{
FILE *fp;
if (LogOnScreen) {
printf(fmt, argv1, argv2, argv3, argv4, argv5, argv6, argv7,
argv8, argv9, argv10);
fflush (stdout);
}
if (LogInFile) {
if ((fp = fopen(bootplog, "a+")) == NULL) {
tprintf ("Cannot open bootplog.\n");
return;
}
fprintf(fp, fmt, argv1, argv2, argv3, argv4, argv5, argv6, argv7,
argv8, argv9, argv10);
fflush (fp);
fclose(fp);
}
}
#endif