380 lines
9.3 KiB
C
380 lines
9.3 KiB
C
/*
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* This code is not copyright, and is placed in the public domain.
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* Feel free to use and modify. Please send modifications and/or
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* suggestions + bug fixes to Klas Heggemann <klas@nada.kth.se>
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*
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* Various small changes by Theo de Raadt <deraadt@fsa.ca>
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* Parser rewritten (adding YP support) by Roland McGrath <roland@frob.com>
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*
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* $Id: bootparamd.c,v 1.4 1994/11/29 15:03:13 glass Exp $
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*/
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <rpc/rpc.h>
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#include <rpcsvc/bootparam_prot.h>
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#include <stdio.h>
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#include <netdb.h>
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#include <ctype.h>
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#include <syslog.h>
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#include <string.h>
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#include "pathnames.h"
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#define MAXLEN 800
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struct hostent *he;
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static char buffer[MAXLEN];
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static char hostname[MAX_MACHINE_NAME];
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static char askname[MAX_MACHINE_NAME];
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static char path[MAX_PATH_LEN];
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static char domain_name[MAX_MACHINE_NAME];
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extern void bootparamprog_1();
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int debug = 0;
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int dolog = 0;
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unsigned long route_addr, inet_addr();
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struct sockaddr_in my_addr;
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char *progname;
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char *bootpfile = _PATH_BOOTPARAMS;
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extern char *optarg;
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extern int optind;
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void
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usage()
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{
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fprintf(stderr,
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"usage: rpc.bootparamd [-d] [-s] [-r router] [-f bootparmsfile]\n");
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}
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/*
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* ever familiar
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*/
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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SVCXPRT *transp;
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int i, s, pid;
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char *rindex();
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struct hostent *he;
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struct stat buf;
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char *optstring;
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char c;
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progname = rindex(argv[0], '/');
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if (progname)
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progname++;
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else
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progname = argv[0];
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while ((c = getopt(argc, argv, "dsr:f:")) != EOF)
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switch (c) {
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case 'd':
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debug = 1;
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break;
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case 'r':
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if (isdigit(*optarg)) {
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route_addr = inet_addr(optarg);
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break;
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}
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he = gethostbyname(optarg);
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if (!he) {
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fprintf(stderr, "%s: No such host %s\n",
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progname, optarg);
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usage();
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exit(1);
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}
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bcopy(he->h_addr, (char *) &route_addr, sizeof(route_addr));
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break;
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case 'f':
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bootpfile = optarg;
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break;
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case 's':
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dolog = 1;
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#ifndef LOG_DAEMON
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openlog(progname, 0, 0);
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#else
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openlog(progname, 0, LOG_DAEMON);
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setlogmask(LOG_UPTO(LOG_NOTICE));
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#endif
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break;
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default:
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usage();
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exit(1);
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}
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if (stat(bootpfile, &buf)) {
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fprintf(stderr, "%s: ", progname);
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perror(bootpfile);
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exit(1);
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}
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if (!route_addr) {
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get_myaddress(&my_addr);
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bcopy(&my_addr.sin_addr.s_addr, &route_addr, sizeof(route_addr));
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}
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if (!debug)
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daemon();
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(void) pmap_unset(BOOTPARAMPROG, BOOTPARAMVERS);
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transp = svcudp_create(RPC_ANYSOCK);
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if (transp == NULL) {
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fprintf(stderr, "cannot create udp service.\n");
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exit(1);
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}
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if (!svc_register(transp, BOOTPARAMPROG, BOOTPARAMVERS,
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bootparamprog_1, IPPROTO_UDP)) {
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fprintf(stderr,
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"bootparamd: unable to register BOOTPARAMPROG version %d, udp)\n",
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BOOTPARAMVERS);
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exit(1);
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}
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svc_run();
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fprintf(stderr, "svc_run returned\n");
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exit(1);
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}
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bp_whoami_res *
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bootparamproc_whoami_1(whoami)
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bp_whoami_arg *whoami;
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{
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long haddr;
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static bp_whoami_res res;
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if (debug)
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fprintf(stderr, "whoami got question for %d.%d.%d.%d\n",
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255 & whoami->client_address.bp_address_u.ip_addr.net,
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255 & whoami->client_address.bp_address_u.ip_addr.host,
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255 & whoami->client_address.bp_address_u.ip_addr.lh,
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255 & whoami->client_address.bp_address_u.ip_addr.impno);
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if (dolog)
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syslog(LOG_NOTICE, "whoami got question for %d.%d.%d.%d\n",
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255 & whoami->client_address.bp_address_u.ip_addr.net,
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255 & whoami->client_address.bp_address_u.ip_addr.host,
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255 & whoami->client_address.bp_address_u.ip_addr.lh,
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255 & whoami->client_address.bp_address_u.ip_addr.impno);
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bcopy((char *) &whoami->client_address.bp_address_u.ip_addr, (char *) &haddr,
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sizeof(haddr));
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he = gethostbyaddr((char *) &haddr, sizeof(haddr), AF_INET);
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if (!he)
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goto failed;
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if (debug)
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fprintf(stderr, "This is host %s\n", he->h_name);
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if (dolog)
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syslog(LOG_NOTICE, "This is host %s\n", he->h_name);
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strcpy(askname, he->h_name);
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if (!lookup_bootparam(askname, hostname, NULL, NULL, NULL)) {
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res.client_name = hostname;
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getdomainname(domain_name, MAX_MACHINE_NAME);
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res.domain_name = domain_name;
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if (res.router_address.address_type != IP_ADDR_TYPE) {
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res.router_address.address_type = IP_ADDR_TYPE;
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bcopy(&route_addr, &res.router_address.bp_address_u.ip_addr, 4);
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}
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if (debug)
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fprintf(stderr, "Returning %s %s %d.%d.%d.%d\n",
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res.client_name, res.domain_name,
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255 & res.router_address.bp_address_u.ip_addr.net,
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255 & res.router_address.bp_address_u.ip_addr.host,
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255 & res.router_address.bp_address_u.ip_addr.lh,
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255 & res.router_address.bp_address_u.ip_addr.impno);
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if (dolog)
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syslog(LOG_NOTICE, "Returning %s %s %d.%d.%d.%d\n",
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res.client_name, res.domain_name,
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255 & res.router_address.bp_address_u.ip_addr.net,
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255 & res.router_address.bp_address_u.ip_addr.host,
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255 & res.router_address.bp_address_u.ip_addr.lh,
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255 & res.router_address.bp_address_u.ip_addr.impno);
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return (&res);
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}
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failed:
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if (debug)
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fprintf(stderr, "whoami failed\n");
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if (dolog)
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syslog(LOG_NOTICE, "whoami failed\n");
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return (NULL);
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}
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bp_getfile_res *
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bootparamproc_getfile_1(getfile)
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bp_getfile_arg *getfile;
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{
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char *where, *index();
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static bp_getfile_res res;
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int err;
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if (debug)
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fprintf(stderr, "getfile got question for \"%s\" and file \"%s\"\n",
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getfile->client_name, getfile->file_id);
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if (dolog)
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syslog(LOG_NOTICE, "getfile got question for \"%s\" and file \"%s\"\n",
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getfile->client_name, getfile->file_id);
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he = NULL;
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he = gethostbyname(getfile->client_name);
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if (!he)
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goto failed;
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strcpy(askname, he->h_name);
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err = lookup_bootparam(askname, NULL, getfile->file_id,
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&res.server_name, &res.server_path);
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if (err == 0) {
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he = gethostbyname(res.server_name);
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if (!he)
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goto failed;
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bcopy(he->h_addr, &res.server_address.bp_address_u.ip_addr, 4);
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res.server_address.address_type = IP_ADDR_TYPE;
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} else if (err == ENOENT && !strcmp(getfile->file_id, "dump")) {
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/* Special for dump, answer with null strings. */
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res.server_name[0] = '\0';
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res.server_path[0] = '\0';
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bzero(&res.server_address.bp_address_u.ip_addr, 4);
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} else {
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failed:
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if (debug)
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fprintf(stderr, "getfile failed for %s\n",
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getfile->client_name);
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if (dolog)
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syslog(LOG_NOTICE,
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"getfile failed for %s\n", getfile->client_name);
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return (NULL);
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}
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if (debug)
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fprintf(stderr,
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"returning server:%s path:%s address: %d.%d.%d.%d\n",
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res.server_name, res.server_path,
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255 & res.server_address.bp_address_u.ip_addr.net,
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255 & res.server_address.bp_address_u.ip_addr.host,
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255 & res.server_address.bp_address_u.ip_addr.lh,
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255 & res.server_address.bp_address_u.ip_addr.impno);
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if (dolog)
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syslog(LOG_NOTICE,
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"returning server:%s path:%s address: %d.%d.%d.%d\n",
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res.server_name, res.server_path,
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255 & res.server_address.bp_address_u.ip_addr.net,
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255 & res.server_address.bp_address_u.ip_addr.host,
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255 & res.server_address.bp_address_u.ip_addr.lh,
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255 & res.server_address.bp_address_u.ip_addr.impno);
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return (&res);
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}
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int
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lookup_bootparam(client, client_canonical, id, server, path)
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char *client;
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char *client_canonical;
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char *id;
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char **server;
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char **path;
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{
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FILE *f = fopen(bootpfile, "r");
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#ifdef YP
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static char *ypbuf = NULL;
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static int ypbuflen = 0;
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#endif
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static char buf[BUFSIZ];
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char *bp, *word;
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size_t idlen = id == NULL ? 0 : strlen(id);
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int contin = 0;
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int found = 0;
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if (f == NULL)
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return EINVAL; /* ? */
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while (fgets(buf, sizeof buf, f)) {
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int wascontin = contin;
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contin = buf[strlen(buf) - 2] == '\\';
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bp = buf + strspn(buf, " \t\n");
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switch (wascontin) {
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case -1:
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/* Continuation of uninteresting line */
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contin *= -1;
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continue;
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case 0:
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/* New line */
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contin *= -1;
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if (*bp == '#')
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continue;
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if ((word = strsep(&bp, " \t\n")) == NULL)
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continue;
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#ifdef YP
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/* A + in the file means try YP now */
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if (!strcmp(word, "+")) {
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char *ypdom;
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if (yp_get_default_domain(&ypdom) ||
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yp_match(ypdom, "bootparams", client,
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strlen(client), &ypbuf, &ypbuflen))
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continue;
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bp = ypbuf;
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word = client;
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contin *= -1;
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break;
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}
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#endif
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/* See if this line's client is the one we are
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* looking for */
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if (strcmp(word, client) != 0) {
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/*
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* If it didn't match, try getting the
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* canonical host name of the client
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* on this line and comparing that to
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* the client we are looking for
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*/
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struct hostent *hp = gethostbyname(word);
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if (hp == NULL || strcmp(hp->h_name, client))
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continue;
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}
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contin *= -1;
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break;
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case 1:
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/* Continued line we want to parse below */
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break;
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}
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if (client_canonical)
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strncpy(client_canonical, word, MAX_MACHINE_NAME);
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/* We have found a line for CLIENT */
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if (id == NULL) {
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(void) fclose(f);
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return 0;
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}
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/* Look for a value for the parameter named by ID */
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while ((word = strsep(&bp, " \t\n")) != NULL) {
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if (!strncmp(word, id, idlen) && word[idlen] == '=') {
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/* We have found the entry we want */
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*server = &word[idlen + 1];
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*path = strchr(*server, ':');
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if (*path == NULL)
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/* Malformed entry */
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continue;
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*(*path)++ = '\0';
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(void) fclose(f);
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return 0;
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}
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}
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found = 1;
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}
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(void) fclose(f);
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return found ? ENOENT : EPERM;
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}
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