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/* $OpenBSD: bootparamd.c,v 1.20 2015/11/26 19:00:40 deraadt Exp $ */
/*
* This code is not copyright, and is placed in the public domain.
* Feel free to use and modify. Please send modifications and/or
* suggestions + bug fixes to Klas Heggemann <klas@nada.kth.se>
*
* Various small changes by Theo de Raadt <deraadt@fsa.ca>
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <rpc/rpc.h>
#include <rpcsvc/bootparam_prot.h>
#include <rpcsvc/ypclnt.h>
#include <rpcsvc/yp_prot.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <netdb.h>
#include <ctype.h>
#include <syslog.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include <stdlib.h>
#include "pathnames.h"
#define MAXLEN 800
struct hostent *he;
static char hostname[MAX_MACHINE_NAME];
static char askname[MAX_MACHINE_NAME];
static char domain_name[MAX_MACHINE_NAME];
extern void bootparamprog_1(struct svc_req *, SVCXPRT *);
int lookup_bootparam(char *client, char *client_canonical, char *id,
char **server, char **path);
int _rpcsvcdirty = 0;
int _rpcpmstart = 0;
int debug = 0;
int dolog = 0;
struct in_addr route_addr;
struct sockaddr_in my_addr;
extern char *__progname;
char *bootpfile = _PATH_BOOTPARAMS;
extern char *optarg;
extern int optind;
static void
usage(void)
{
extern char *__progname;
fprintf(stderr, "usage: %s [-ds] [-f file] [-r router]\n",
__progname);
exit(1);
}
/*
* ever familiar
*/
int
main(int argc, char *argv[])
{
struct hostent *he;
struct stat buf;
SVCXPRT *transp;
int c;
while ((c = getopt(argc, argv, "dsr:f:")) != -1)
switch (c) {
case 'd':
debug = 1;
break;
case 'r':
if (inet_aton(optarg, &route_addr) == 1)
break;
he = gethostbyname(optarg);
if (!he) {
warnx("no such host: %s", optarg);
usage();
}
bcopy(he->h_addr, &route_addr.s_addr,
sizeof(route_addr.s_addr));
break;
case 'f':
bootpfile = optarg;
break;
case 's':
dolog = 1;
#ifndef LOG_DAEMON
openlog(__progname, 0, 0);
#else
openlog(__progname, 0, LOG_DAEMON);
setlogmask(LOG_UPTO(LOG_NOTICE));
#endif
break;
default:
usage();
}
if (stat(bootpfile, &buf))
err(1, "%s", bootpfile);
if (!route_addr.s_addr) {
get_myaddress(&my_addr);
bcopy(&my_addr.sin_addr.s_addr, &route_addr.s_addr,
sizeof(route_addr.s_addr));
}
if (!debug) {
if (daemon(0, 0))
err(1, "can't detach from terminal");
}
(void) pmap_unset(BOOTPARAMPROG, BOOTPARAMVERS);
transp = svcudp_create(RPC_ANYSOCK);
if (transp == NULL)
errx(1, "can't create udp service");
if (!svc_register(transp, BOOTPARAMPROG, BOOTPARAMVERS, bootparamprog_1,
IPPROTO_UDP))
errx(1, "unable to register BOOTPARAMPROG version %ld, udp",
BOOTPARAMVERS);
if (pledge("stdio rpath dns", NULL) == -1)
err(1, "pledge");
svc_run();
errx(1, "svc_run returned");
}
bp_whoami_res *
bootparamproc_whoami_1_svc(bp_whoami_arg *whoami, struct svc_req *rqstp)
{
in_addr_t haddr;
static bp_whoami_res res;
if (debug)
warnx("whoami got question for %d.%d.%d.%d",
255 & whoami->client_address.bp_address_u.ip_addr.net,
255 & whoami->client_address.bp_address_u.ip_addr.host,
255 & whoami->client_address.bp_address_u.ip_addr.lh,
255 & whoami->client_address.bp_address_u.ip_addr.impno);
if (dolog)
syslog(LOG_NOTICE, "whoami got question for %d.%d.%d.%d",
255 & whoami->client_address.bp_address_u.ip_addr.net,
255 & whoami->client_address.bp_address_u.ip_addr.host,
255 & whoami->client_address.bp_address_u.ip_addr.lh,
255 & whoami->client_address.bp_address_u.ip_addr.impno);
bcopy(&whoami->client_address.bp_address_u.ip_addr,
&haddr, sizeof(haddr));
he = gethostbyaddr(&haddr, sizeof(haddr), AF_INET);
if (!he)
goto failed;
if (debug)
warnx("This is host %s", he->h_name);
if (dolog)
syslog(LOG_NOTICE, "This is host %s", he->h_name);
strlcpy(askname, he->h_name, sizeof askname);
if (!lookup_bootparam(askname, hostname, NULL, NULL, NULL)) {
res.client_name = hostname;
getdomainname(domain_name, MAX_MACHINE_NAME);
res.domain_name = domain_name;
if (res.router_address.address_type != IP_ADDR_TYPE) {
res.router_address.address_type = IP_ADDR_TYPE;
bcopy(&route_addr.s_addr,
&res.router_address.bp_address_u.ip_addr, 4);
}
if (debug)
warnx("Returning %s %s %d.%d.%d.%d",
res.client_name, res.domain_name,
255 & res.router_address.bp_address_u.ip_addr.net,
255 & res.router_address.bp_address_u.ip_addr.host,
255 & res.router_address.bp_address_u.ip_addr.lh,
255 & res.router_address.bp_address_u.ip_addr.impno);
if (dolog)
syslog(LOG_NOTICE, "Returning %s %s %d.%d.%d.%d",
res.client_name, res.domain_name,
255 & res.router_address.bp_address_u.ip_addr.net,
255 & res.router_address.bp_address_u.ip_addr.host,
255 & res.router_address.bp_address_u.ip_addr.lh,
255 & res.router_address.bp_address_u.ip_addr.impno);
return (&res);
}
failed:
if (debug)
warnx("whoami failed");
if (dolog)
syslog(LOG_NOTICE, "whoami failed");
return (NULL);
}
bp_getfile_res *
bootparamproc_getfile_1_svc(bp_getfile_arg *getfile, struct svc_req *rqstp)
{
static bp_getfile_res res;
int err;
if (debug)
warnx("getfile got question for \"%s\" and file \"%s\"",
getfile->client_name, getfile->file_id);
if (dolog)
syslog(LOG_NOTICE,
"getfile got question for \"%s\" and file \"%s\"",
getfile->client_name, getfile->file_id);
he = NULL;
he = gethostbyname(getfile->client_name);
if (!he)
goto failed;
strlcpy(askname, he->h_name, sizeof askname);
err = lookup_bootparam(askname, NULL, getfile->file_id,
&res.server_name, &res.server_path);
if (err == 0) {
he = gethostbyname(res.server_name);
if (!he)
goto failed;
bcopy(he->h_addr, &res.server_address.bp_address_u.ip_addr, 4);
res.server_address.address_type = IP_ADDR_TYPE;
} else if (err == ENOENT && !strcmp(getfile->file_id, "dump")) {
/* Special for dump, answer with null strings. */
res.server_name[0] = '\0';
res.server_path[0] = '\0';
bzero(&res.server_address.bp_address_u.ip_addr, 4);
} else {
failed:
if (debug)
warnx("getfile failed for %s", getfile->client_name);
if (dolog)
syslog(LOG_NOTICE,
"getfile failed for %s", getfile->client_name);
return (NULL);
}
if (debug)
warnx("returning server:%s path:%s address: %d.%d.%d.%d",
res.server_name, res.server_path,
255 & res.server_address.bp_address_u.ip_addr.net,
255 & res.server_address.bp_address_u.ip_addr.host,
255 & res.server_address.bp_address_u.ip_addr.lh,
255 & res.server_address.bp_address_u.ip_addr.impno);
if (dolog)
syslog(LOG_NOTICE,
"returning server:%s path:%s address: %d.%d.%d.%d",
res.server_name, res.server_path,
255 & res.server_address.bp_address_u.ip_addr.net,
255 & res.server_address.bp_address_u.ip_addr.host,
255 & res.server_address.bp_address_u.ip_addr.lh,
255 & res.server_address.bp_address_u.ip_addr.impno);
return (&res);
}
int
lookup_bootparam(char *client, char *client_canonical, char *id,
char **server, char **path)
{
FILE *f;
static char buf[BUFSIZ];
char *bp, *word = NULL;
size_t idlen = id == NULL ? 0 : strlen(id);
int contin = 0, found = 0;
f = fopen(bootpfile, "r");
if (f == NULL)
return EINVAL; /* ? */
while (fgets(buf, sizeof buf, f)) {
int wascontin = contin;
contin = buf[strlen(buf) - 2] == '\\';
bp = buf + strspn(buf, " \t\n");
switch (wascontin) {
case -1:
/* Continuation of uninteresting line */
contin *= -1;
continue;
case 0:
/* New line */
contin *= -1;
if (*bp == '#')
continue;
if ((word = strsep(&bp, " \t\n")) == NULL)
continue;
/* See if this line's client is the one we are
* looking for */
if (strcasecmp(word, client) != 0) {
/*
* If it didn't match, try getting the
* canonical host name of the client
* on this line and comparing that to
* the client we are looking for
*/
struct hostent *hp = gethostbyname(word);
if (hp == NULL || strcasecmp(hp->h_name, client))
continue;
}
contin *= -1;
break;
case 1:
/* Continued line we want to parse below */
break;
}
if (client_canonical)
strlcpy(client_canonical, word, MAX_MACHINE_NAME);
/* We have found a line for CLIENT */
if (id == NULL) {
(void) fclose(f);
return 0;
}
/* Look for a value for the parameter named by ID */
while ((word = strsep(&bp, " \t\n")) != NULL) {
if (!strncmp(word, id, idlen) && word[idlen] == '=') {
/* We have found the entry we want */
*server = &word[idlen + 1];
*path = strchr(*server, ':');
if (*path == NULL)
/* Malformed entry */
continue;
*(*path)++ = '\0';
(void) fclose(f);
return 0;
}
}
found = 1;
}
(void) fclose(f);
return found ? ENOENT : EPERM;
}
|
