ypbind.c revision 30762
11927Swollman/* 21927Swollman * Copyright (c) 1992/3 Theo de Raadt <deraadt@fsa.ca> 31927Swollman * All rights reserved. 41927Swollman * 51927Swollman * Redistribution and use in source and binary forms, with or without 61927Swollman * modification, are permitted provided that the following conditions 71927Swollman * are met: 81927Swollman * 1. Redistributions of source code must retain the above copyright 91927Swollman * notice, this list of conditions and the following disclaimer. 101927Swollman * 2. Redistributions in binary form must reproduce the above copyright 111927Swollman * notice, this list of conditions and the following disclaimer in the 121927Swollman * documentation and/or other materials provided with the distribution. 131927Swollman * 3. The name of the author may not be used to endorse or promote 141927Swollman * products derived from this software without specific prior written 151927Swollman * permission. 161927Swollman * 171927Swollman * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 181927Swollman * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 191927Swollman * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201927Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 211927Swollman * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221927Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231927Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241927Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251927Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261927Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271927Swollman * SUCH DAMAGE. 281927Swollman */ 291927Swollman 3030762Scharnier#ifndef lint 3130762Scharnierstatic const char rcsid[] = 3230762Scharnier "$Id$"; 3330762Scharnier#endif /* not lint */ 341927Swollman 351927Swollman#include <sys/param.h> 361927Swollman#include <sys/types.h> 378091Swpaul#include <sys/wait.h> 381927Swollman#include <sys/ioctl.h> 391927Swollman#include <sys/signal.h> 401927Swollman#include <sys/socket.h> 411927Swollman#include <sys/file.h> 421927Swollman#include <sys/fcntl.h> 438091Swpaul#include <sys/stat.h> 441927Swollman#include <sys/uio.h> 451927Swollman#include <ctype.h> 461927Swollman#include <dirent.h> 4730762Scharnier#include <err.h> 4830762Scharnier#include <errno.h> 491927Swollman#include <netdb.h> 5030762Scharnier#include <signal.h> 5130762Scharnier#include <stdio.h> 5230762Scharnier#include <stdlib.h> 531927Swollman#include <string.h> 5430762Scharnier#include <syslog.h> 5530762Scharnier#include <unistd.h> 561927Swollman#include <rpc/rpc.h> 571927Swollman#include <rpc/xdr.h> 581927Swollman#include <net/if.h> 596732Swpaul#include <netinet/in.h> 601927Swollman#include <arpa/inet.h> 611927Swollman#include <rpc/pmap_clnt.h> 621927Swollman#include <rpc/pmap_prot.h> 631927Swollman#include <rpc/pmap_rmt.h> 6430762Scharnier#include <rpc/rpc_com.h> 6512862Swpaul#include <rpcsvc/yp.h> 6612862Swpaulstruct dom_binding{}; 671927Swollman#include <rpcsvc/ypclnt.h> 6826135Swpaul#include "yp_ping.h" 691927Swollman 701927Swollman#ifndef BINDINGDIR 711927Swollman#define BINDINGDIR "/var/yp/binding" 721927Swollman#endif 731927Swollman 748474Swpaul#ifndef YPBINDLOCK 758474Swpaul#define YPBINDLOCK "/var/run/ypbind.lock" 768474Swpaul#endif 778474Swpaul 781927Swollmanstruct _dom_binding { 791927Swollman struct _dom_binding *dom_pnext; 801927Swollman char dom_domain[YPMAXDOMAIN + 1]; 811927Swollman struct sockaddr_in dom_server_addr; 821927Swollman long int dom_vers; 831927Swollman int dom_lockfd; 841927Swollman int dom_alive; 858755Swpaul int dom_broadcast_pid; 868755Swpaul int dom_pipe_fds[2]; 878091Swpaul int dom_default; 881927Swollman}; 891927Swollman 908755Swpaul#define READFD ypdb->dom_pipe_fds[0] 918755Swpaul#define WRITEFD ypdb->dom_pipe_fds[1] 928755Swpaul#define BROADFD broad_domain->dom_pipe_fds[1] 938755Swpaul 941927Swollmanextern bool_t xdr_domainname(), xdr_ypbind_resp(); 951927Swollmanextern bool_t xdr_ypreq_key(), xdr_ypresp_val(); 961927Swollmanextern bool_t xdr_ypbind_setdom(); 971927Swollman 988091Swpaulvoid checkwork __P((void)); 998091Swpaulvoid *ypbindproc_null_2 __P((SVCXPRT *, void *, CLIENT *)); 1008755Swpaulvoid *ypbindproc_setdom_2 __P((SVCXPRT *, struct ypbind_setdom *, CLIENT *)); 1018091Swpaulvoid rpc_received __P((char *, struct sockaddr_in *, int )); 1028091Swpaulvoid broadcast __P((struct _dom_binding *)); 1038425Swpaulint ping __P((struct _dom_binding *)); 1048755Swpaulint tell_parent __P((char *, struct sockaddr_in *)); 1058853Swpaulvoid handle_children __P(( struct _dom_binding * )); 1068425Swpaulvoid reaper __P((int)); 1078425Swpaulvoid terminate __P((int)); 1089600Swpaulvoid yp_restricted_mode __P((char *)); 1099600Swpaulint verify __P((struct in_addr)); 1108091Swpaul 11112862Swpaulchar *domain_name; 1121927Swollmanstruct _dom_binding *ypbindlist; 1138755Swpaulstatic struct _dom_binding *broad_domain; 1141927Swollman 1151927Swollman#define YPSET_NO 0 1161927Swollman#define YPSET_LOCAL 1 1171927Swollman#define YPSET_ALL 2 1181927Swollmanint ypsetmode = YPSET_NO; 1196732Swpaulint ypsecuremode = 0; 12021581Swpaulint ppid; 1216732Swpaul 1229600Swpaul/* 1239600Swpaul * Special restricted mode variables: when in restricted mode, only the 1249600Swpaul * specified restricted_domain will be bound, and only the servers listed 1259600Swpaul * in restricted_addrs will be used for binding. 1269600Swpaul */ 1279600Swpaul#define RESTRICTED_SERVERS 10 1289600Swpaulint yp_restricted = 0; 12926135Swpaulint yp_manycast = 0; 1309600Swpaulstruct in_addr restricted_addrs[RESTRICTED_SERVERS]; 1319600Swpaul 1328091Swpaul/* No more than MAX_CHILDREN child broadcasters at a time. */ 1338755Swpaul#ifndef MAX_CHILDREN 1348091Swpaul#define MAX_CHILDREN 5 1358755Swpaul#endif 1368425Swpaul/* No more than MAX_DOMAINS simultaneous domains */ 1378755Swpaul#ifndef MAX_DOMAINS 1388425Swpaul#define MAX_DOMAINS 200 1398755Swpaul#endif 1408755Swpaul/* RPC timeout value */ 1418425Swpaul#ifndef FAIL_THRESHOLD 14221539Swpaul#define FAIL_THRESHOLD 20 1438425Swpaul#endif 1448425Swpaul 1459600Swpaul/* Number of times to fish for a response froma particular set of hosts */ 1469600Swpaul#ifndef MAX_RETRIES 1479600Swpaul#define MAX_RETRIES 30 1489600Swpaul#endif 1499600Swpaul 1509600Swpaulint retries = 0; 1518091Swpaulint children = 0; 1528425Swpaulint domains = 0; 1538474Swpaulint yplockfd; 1548755Swpaulfd_set fdsr; 1558091Swpaul 1561927SwollmanSVCXPRT *udptransp, *tcptransp; 1571927Swollman 1581927Swollmanvoid * 1591927Swollmanypbindproc_null_2(transp, argp, clnt) 1601927SwollmanSVCXPRT *transp; 1611927Swollmanvoid *argp; 1621927SwollmanCLIENT *clnt; 1631927Swollman{ 1641927Swollman static char res; 1651927Swollman 1661927Swollman bzero((char *)&res, sizeof(res)); 1671927Swollman return (void *)&res; 1681927Swollman} 1691927Swollman 1701927Swollmanstruct ypbind_resp * 1711927Swollmanypbindproc_domain_2(transp, argp, clnt) 1721927SwollmanSVCXPRT *transp; 17312862Swpauldomainname *argp; 1741927SwollmanCLIENT *clnt; 1751927Swollman{ 1761927Swollman static struct ypbind_resp res; 1771927Swollman struct _dom_binding *ypdb; 1781927Swollman char path[MAXPATHLEN]; 1791927Swollman 1801927Swollman bzero((char *)&res, sizeof res); 1811927Swollman res.ypbind_status = YPBIND_FAIL_VAL; 18212862Swpaul res.ypbind_resp_u.ypbind_error = YPBIND_ERR_NOSERV; 1831927Swollman 18424782Swpaul if (strchr(*argp, '/')) { 18524782Swpaul syslog(LOG_WARNING, "Domain name '%s' has embedded slash -- \ 18624782Swpaulrejecting.", *argp); 18724782Swpaul return(&res); 18824782Swpaul } 18924782Swpaul 1908755Swpaul for(ypdb=ypbindlist; ypdb; ypdb=ypdb->dom_pnext) { 19112862Swpaul if( strcmp(ypdb->dom_domain, *argp) == 0) 1921927Swollman break; 1938755Swpaul } 1941927Swollman 1951927Swollman if(ypdb==NULL) { 1969600Swpaul if (yp_restricted) { 19712862Swpaul syslog(LOG_NOTICE, "Running in restricted mode -- request to bind domain \"%s\" rejected.\n", *argp); 1989600Swpaul return &res; 1999600Swpaul } 2009600Swpaul 2018474Swpaul if (domains >= MAX_DOMAINS) { 2028425Swpaul syslog(LOG_WARNING, "domain limit (%d) exceeded", 2038425Swpaul MAX_DOMAINS); 20412862Swpaul res.ypbind_resp_u.ypbind_error = YPBIND_ERR_RESC; 2058428Swpaul return &res; 2068425Swpaul } 2071927Swollman ypdb = (struct _dom_binding *)malloc(sizeof *ypdb); 2088857Srgrimes if (ypdb == NULL) { 20921539Swpaul syslog(LOG_WARNING, "malloc: %m"); 21012862Swpaul res.ypbind_resp_u.ypbind_error = YPBIND_ERR_RESC; 2118428Swpaul return &res; 2128246Swpaul } 2131927Swollman bzero((char *)ypdb, sizeof *ypdb); 21412862Swpaul strncpy(ypdb->dom_domain, *argp, sizeof ypdb->dom_domain); 2151927Swollman ypdb->dom_vers = YPVERS; 2161927Swollman ypdb->dom_alive = 0; 2178091Swpaul ypdb->dom_default = 0; 2181927Swollman ypdb->dom_lockfd = -1; 2198425Swpaul sprintf(path, "%s/%s.%ld", BINDINGDIR, 2208425Swpaul ypdb->dom_domain, ypdb->dom_vers); 2211927Swollman unlink(path); 2221927Swollman ypdb->dom_pnext = ypbindlist; 2231927Swollman ypbindlist = ypdb; 2248425Swpaul domains++; 2251927Swollman } 2261927Swollman 2278755Swpaul if (ping(ypdb)) { 2287982Swpaul return &res; 2298755Swpaul } 2301927Swollman 2311927Swollman res.ypbind_status = YPBIND_SUCC_VAL; 23212862Swpaul res.ypbind_resp_u.ypbind_error = 0; /* Success */ 23312862Swpaul *(u_long *)&res.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr = 2341927Swollman ypdb->dom_server_addr.sin_addr.s_addr; 23512862Swpaul *(u_short *)&res.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port = 2368091Swpaul ypdb->dom_server_addr.sin_port; 2371927Swollman /*printf("domain %s at %s/%d\n", ypdb->dom_domain, 2381927Swollman inet_ntoa(ypdb->dom_server_addr.sin_addr), 2391927Swollman ntohs(ypdb->dom_server_addr.sin_port));*/ 2401927Swollman return &res; 2411927Swollman} 2421927Swollman 2438755Swpaulvoid * 2441927Swollmanypbindproc_setdom_2(transp, argp, clnt) 2451927SwollmanSVCXPRT *transp; 24612862Swpaulypbind_setdom *argp; 2471927SwollmanCLIENT *clnt; 2481927Swollman{ 2491927Swollman struct sockaddr_in *fromsin, bindsin; 2501927Swollman 25124782Swpaul if (strchr(argp->ypsetdom_domain, '/')) { 25224782Swpaul syslog(LOG_WARNING, "Domain name '%s' has embedded slash -- \ 25324782Swpaulrejecting.", argp->ypsetdom_domain); 25430762Scharnier return(NULL); 25524782Swpaul } 2561927Swollman fromsin = svc_getcaller(transp); 2571927Swollman 2581927Swollman switch(ypsetmode) { 2591927Swollman case YPSET_LOCAL: 2608755Swpaul if( fromsin->sin_addr.s_addr != htonl(INADDR_LOOPBACK)) { 2618755Swpaul svcerr_noprog(transp); 26230762Scharnier return(NULL); 2638755Swpaul } 2641927Swollman break; 2651927Swollman case YPSET_ALL: 2661927Swollman break; 2671927Swollman case YPSET_NO: 2681927Swollman default: 2698755Swpaul svcerr_noprog(transp); 27030762Scharnier return(NULL); 2711927Swollman } 2721927Swollman 2738755Swpaul if(ntohs(fromsin->sin_port) >= IPPORT_RESERVED) { 2748755Swpaul svcerr_noprog(transp); 27530762Scharnier return(NULL); 2768755Swpaul } 2771927Swollman 2788755Swpaul if(argp->ypsetdom_vers != YPVERS) { 2798755Swpaul svcerr_noprog(transp); 28030762Scharnier return(NULL); 2818755Swpaul } 2821927Swollman 2831927Swollman bzero((char *)&bindsin, sizeof bindsin); 2841927Swollman bindsin.sin_family = AF_INET; 28512862Swpaul bindsin.sin_addr.s_addr = *(u_long *)argp->ypsetdom_binding.ypbind_binding_addr; 28612862Swpaul bindsin.sin_port = *(u_short *)argp->ypsetdom_binding.ypbind_binding_port; 2871927Swollman rpc_received(argp->ypsetdom_domain, &bindsin, 1); 2881927Swollman 28930762Scharnier return(NULL); 2901927Swollman} 2911927Swollman 2921927Swollmanstatic void 2931927Swollmanypbindprog_2(rqstp, transp) 2941927Swollmanstruct svc_req *rqstp; 2951927Swollmanregister SVCXPRT *transp; 2961927Swollman{ 2971927Swollman union { 29812862Swpaul domainname ypbindproc_domain_2_arg; 2991927Swollman struct ypbind_setdom ypbindproc_setdom_2_arg; 3001927Swollman } argument; 3011927Swollman struct authunix_parms *creds; 3021927Swollman char *result; 3031927Swollman bool_t (*xdr_argument)(), (*xdr_result)(); 3041927Swollman char *(*local)(); 3051927Swollman 3061927Swollman switch (rqstp->rq_proc) { 3071927Swollman case YPBINDPROC_NULL: 3081927Swollman xdr_argument = xdr_void; 3091927Swollman xdr_result = xdr_void; 3101927Swollman local = (char *(*)()) ypbindproc_null_2; 3111927Swollman break; 3121927Swollman 3131927Swollman case YPBINDPROC_DOMAIN: 3141927Swollman xdr_argument = xdr_domainname; 3151927Swollman xdr_result = xdr_ypbind_resp; 3161927Swollman local = (char *(*)()) ypbindproc_domain_2; 3171927Swollman break; 3181927Swollman 3191927Swollman case YPBINDPROC_SETDOM: 3201927Swollman switch(rqstp->rq_cred.oa_flavor) { 3211927Swollman case AUTH_UNIX: 3221927Swollman creds = (struct authunix_parms *)rqstp->rq_clntcred; 3231927Swollman if( creds->aup_uid != 0) { 3241927Swollman svcerr_auth(transp, AUTH_BADCRED); 3251927Swollman return; 3261927Swollman } 3271927Swollman break; 3281927Swollman default: 3291927Swollman svcerr_auth(transp, AUTH_TOOWEAK); 3301927Swollman return; 3311927Swollman } 3321927Swollman 3331927Swollman xdr_argument = xdr_ypbind_setdom; 3341927Swollman xdr_result = xdr_void; 3351927Swollman local = (char *(*)()) ypbindproc_setdom_2; 3361927Swollman break; 3371927Swollman 3381927Swollman default: 3391927Swollman svcerr_noproc(transp); 3401927Swollman return; 3411927Swollman } 3421927Swollman bzero((char *)&argument, sizeof(argument)); 34321096Speter if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) { 3441927Swollman svcerr_decode(transp); 3451927Swollman return; 3461927Swollman } 3471927Swollman result = (*local)(transp, &argument, rqstp); 3481927Swollman if (result != NULL && !svc_sendreply(transp, xdr_result, result)) { 3491927Swollman svcerr_systemerr(transp); 3501927Swollman } 3511927Swollman return; 3521927Swollman} 3531927Swollman 3548091Swpaul/* Jack the reaper */ 3558091Swpaulvoid reaper(sig) 3568091Swpaulint sig; 3578091Swpaul{ 3588091Swpaul int st; 3598091Swpaul 3609532Swpaul while(wait3(&st, WNOHANG, NULL) > 0) 3619532Swpaul children--; 3628091Swpaul} 3638091Swpaul 3648425Swpaulvoid terminate(sig) 3658425Swpaulint sig; 3668425Swpaul{ 3678425Swpaul struct _dom_binding *ypdb; 3688425Swpaul char path[MAXPATHLEN]; 3698425Swpaul 37021581Swpaul if (ppid != getpid()) 37121581Swpaul exit(0); 37221581Swpaul 3738425Swpaul for(ypdb=ypbindlist; ypdb; ypdb=ypdb->dom_pnext) { 3748425Swpaul close(ypdb->dom_lockfd); 3758755Swpaul if (ypdb->dom_broadcast_pid) 3768755Swpaul kill(ypdb->dom_broadcast_pid, SIGINT); 3778425Swpaul sprintf(path, "%s/%s.%ld", BINDINGDIR, 3788425Swpaul ypdb->dom_domain, ypdb->dom_vers); 3798425Swpaul unlink(path); 3808425Swpaul } 3818474Swpaul close(yplockfd); 3828474Swpaul unlink(YPBINDLOCK); 3838425Swpaul pmap_unset(YPBINDPROG, YPBINDVERS); 3848425Swpaul exit(0); 3858425Swpaul} 3868857Srgrimes 38721581Swpaulint 3881927Swollmanmain(argc, argv) 3898091Swpaulint argc; 3901927Swollmanchar **argv; 3911927Swollman{ 3921927Swollman struct timeval tv; 3931927Swollman int i; 3948425Swpaul DIR *dird; 3958425Swpaul struct dirent *dirp; 3968755Swpaul struct _dom_binding *ypdb; 3971927Swollman 3988474Swpaul /* Check that another ypbind isn't already running. */ 39930762Scharnier if ((yplockfd = (open(YPBINDLOCK, O_RDONLY|O_CREAT, 0444))) == -1) 40030762Scharnier err(1, "%s", YPBINDLOCK); 4018474Swpaul 40230762Scharnier if(flock(yplockfd, LOCK_EX|LOCK_NB) == -1 && errno == EWOULDBLOCK) 40330762Scharnier errx(1, "another ypbind is already running. Aborting"); 4048474Swpaul 4059600Swpaul /* XXX domainname will be overriden if we use restricted mode */ 40612862Swpaul yp_get_default_domain(&domain_name); 40730762Scharnier if( domain_name[0] == '\0') 40830762Scharnier errx(1, "domainname not set. Aborting"); 4091927Swollman 4101927Swollman for(i=1; i<argc; i++) { 4111927Swollman if( strcmp("-ypset", argv[i]) == 0) 4121927Swollman ypsetmode = YPSET_ALL; 4131927Swollman else if (strcmp("-ypsetme", argv[i]) == 0) 4146732Swpaul ypsetmode = YPSET_LOCAL; 4156732Swpaul else if (strcmp("-s", argv[i]) == 0) 4166732Swpaul ypsecuremode++; 4179600Swpaul else if (strcmp("-S", argv[i]) == 0 && argc > i) 4189600Swpaul yp_restricted_mode(argv[i+1]); 41926135Swpaul else if (strcmp("-m", argv[i]) == 0) 42026135Swpaul yp_manycast++; 4211927Swollman } 4221927Swollman 4238425Swpaul /* blow away everything in BINDINGDIR (if it exists) */ 4241927Swollman 4258425Swpaul if ((dird = opendir(BINDINGDIR)) != NULL) { 4268425Swpaul char path[MAXPATHLEN]; 4278425Swpaul while ((dirp = readdir(dird)) != NULL) 4288425Swpaul if (strcmp(dirp->d_name, ".") && 4298425Swpaul strcmp(dirp->d_name, "..")) { 4308425Swpaul sprintf(path,"%s/%s",BINDINGDIR,dirp->d_name); 4318425Swpaul unlink(path); 4328425Swpaul } 4338425Swpaul closedir(dird); 4348425Swpaul } 4351927Swollman 4361927Swollman#ifdef DAEMON 43730762Scharnier if (daemon(0,0)) 43830762Scharnier err(1, "fork"); 4391927Swollman#endif 4401927Swollman 4411927Swollman pmap_unset(YPBINDPROG, YPBINDVERS); 4421927Swollman 4431927Swollman udptransp = svcudp_create(RPC_ANYSOCK); 44430762Scharnier if (udptransp == NULL) 44530762Scharnier errx(1, "cannot create udp service"); 4461927Swollman if (!svc_register(udptransp, YPBINDPROG, YPBINDVERS, ypbindprog_2, 44730762Scharnier IPPROTO_UDP)) 44830762Scharnier errx(1, "unable to register (YPBINDPROG, YPBINDVERS, udp)"); 4491927Swollman 4501927Swollman tcptransp = svctcp_create(RPC_ANYSOCK, 0, 0); 45130762Scharnier if (tcptransp == NULL) 45230762Scharnier errx(1, "cannot create tcp service"); 4531927Swollman 4541927Swollman if (!svc_register(tcptransp, YPBINDPROG, YPBINDVERS, ypbindprog_2, 45530762Scharnier IPPROTO_TCP)) 45630762Scharnier errx(1, "unable to register (YPBINDPROG, YPBINDVERS, tcp)"); 4571927Swollman 4581927Swollman /* build initial domain binding, make it "unsuccessful" */ 4591927Swollman ypbindlist = (struct _dom_binding *)malloc(sizeof *ypbindlist); 46030762Scharnier if (ypbindlist == NULL) 46130762Scharnier errx(1, "malloc"); 4621927Swollman bzero((char *)ypbindlist, sizeof *ypbindlist); 46312862Swpaul strncpy(ypbindlist->dom_domain, domain_name, sizeof ypbindlist->dom_domain); 4641927Swollman ypbindlist->dom_vers = YPVERS; 4651927Swollman ypbindlist->dom_alive = 0; 4661927Swollman ypbindlist->dom_lockfd = -1; 4678091Swpaul ypbindlist->dom_default = 1; 4688425Swpaul domains++; 4691927Swollman 4708425Swpaul signal(SIGCHLD, reaper); 4718425Swpaul signal(SIGTERM, terminate); 4728425Swpaul 47321581Swpaul ppid = getpid(); /* Remember who we are. */ 47421581Swpaul 4758246Swpaul openlog(argv[0], LOG_PID, LOG_DAEMON); 4766478Swpaul 4778425Swpaul /* Kick off the default domain */ 4788425Swpaul broadcast(ypbindlist); 4798425Swpaul 4801927Swollman while(1) { 4811927Swollman fdsr = svc_fdset; 4828091Swpaul 4838425Swpaul tv.tv_sec = 60; 4841927Swollman tv.tv_usec = 0; 4851927Swollman 4868091Swpaul switch(select(_rpc_dtablesize(), &fdsr, NULL, NULL, &tv)) { 4871927Swollman case 0: 4881927Swollman checkwork(); 4891927Swollman break; 4901927Swollman case -1: 4918755Swpaul if (errno != EINTR) 49221539Swpaul syslog(LOG_WARNING, "select: %m"); 4938755Swpaul break; 4941927Swollman default: 4958755Swpaul for(ypdb=ypbindlist; ypdb; ypdb=ypdb->dom_pnext) { 4968755Swpaul if (READFD > 0 && FD_ISSET(READFD, &fdsr)) { 4978853Swpaul handle_children(ypdb); 4988755Swpaul if (children == (MAX_CHILDREN - 1)) 4998755Swpaul checkwork(); 5008091Swpaul } 5011927Swollman } 5021927Swollman svc_getreqset(&fdsr); 5031927Swollman break; 5041927Swollman } 5051927Swollman } 50621581Swpaul 50721581Swpaul /* NOTREACHED */ 50821581Swpaul exit(1); 5091927Swollman} 5101927Swollman 5118091Swpaulvoid 5121927Swollmancheckwork() 5131927Swollman{ 5141927Swollman struct _dom_binding *ypdb; 5151927Swollman 5168425Swpaul for(ypdb=ypbindlist; ypdb; ypdb=ypdb->dom_pnext) 5178425Swpaul ping(ypdb); 5181927Swollman} 5191927Swollman 5208091Swpaul/* The clnt_broadcast() callback mechanism sucks. */ 5218091Swpaul 5228091Swpaul/* 5238091Swpaul * Receive results from broadcaster. Don't worry about passing 5248853Swpaul * bogus info to rpc_received() -- it can handle it. Note that we 5258853Swpaul * must be sure to invalidate the dom_pipe_fds descriptors here: 5268853Swpaul * since descriptors can be re-used, we have to make sure we 5278853Swpaul * don't mistake one of the RPC descriptors for one of the pipes. 5288853Swpaul * What's weird is that forgetting to invalidate the pipe descriptors 5298853Swpaul * doesn't always result in an error (otherwise I would have caught 5308853Swpaul * the mistake much sooner), even though logically it should. 5318091Swpaul */ 5328853Swpaulvoid handle_children(ypdb) 5338853Swpaulstruct _dom_binding *ypdb; 5348091Swpaul{ 5358091Swpaul char buf[YPMAXDOMAIN + 1]; 5368091Swpaul struct sockaddr_in addr; 53721539Swpaul int d = 0, a = 0; 53821539Swpaul struct _dom_binding *y, *prev = NULL; 53921539Swpaul char path[MAXPATHLEN]; 5408091Swpaul 54121539Swpaul if ((d = read(READFD, &buf, sizeof(buf))) <= 0) 54221539Swpaul syslog(LOG_WARNING, "could not read from child: %m"); 5438755Swpaul 54421539Swpaul if ((a = read(READFD, &addr, sizeof(struct sockaddr_in))) < 0) 54521539Swpaul syslog(LOG_WARNING, "could not read from child: %m"); 54621539Swpaul 5478853Swpaul close(READFD); 5488853Swpaul FD_CLR(READFD, &fdsr); 5498853Swpaul FD_CLR(READFD, &svc_fdset); 5508853Swpaul READFD = WRITEFD = -1; 55121539Swpaul if (d > 0 && a > 0) 55221539Swpaul rpc_received((char *)&buf, &addr, 0); 55321539Swpaul else { 55421539Swpaul for(y=ypbindlist; y; y=y->dom_pnext) { 55521539Swpaul if (y == ypdb) 55621539Swpaul break; 55721539Swpaul prev = y; 55821539Swpaul } 55921539Swpaul switch(ypdb->dom_default) { 56021539Swpaul case 0: 56121539Swpaul if (prev == NULL) 56221539Swpaul ypbindlist = y->dom_pnext; 56321539Swpaul else 56421539Swpaul prev->dom_pnext = y->dom_pnext; 56521539Swpaul sprintf(path, "%s/%s.%ld", BINDINGDIR, 56621539Swpaul ypdb->dom_domain, YPVERS); 56721539Swpaul close(ypdb->dom_lockfd); 56821539Swpaul unlink(path); 56921539Swpaul free(ypdb); 57021539Swpaul domains--; 57121539Swpaul return; 57221539Swpaul case 1: 57321539Swpaul ypdb->dom_broadcast_pid = 0; 57421539Swpaul ypdb->dom_alive = 0; 57521539Swpaul broadcast(ypdb); 57621539Swpaul return; 57721539Swpaul default: 57821539Swpaul break; 57921539Swpaul } 58021539Swpaul } 58121539Swpaul 58221539Swpaul return; 5838091Swpaul} 5848091Swpaul 5858091Swpaul/* 5868091Swpaul * Send our dying words back to our parent before we perish. 5878091Swpaul */ 5888091Swpaulint 5898091Swpaultell_parent(dom, addr) 5901927Swollmanchar *dom; 5918091Swpaulstruct sockaddr_in *addr; 5921927Swollman{ 5938091Swpaul char buf[YPMAXDOMAIN + 1]; 5948091Swpaul struct timeval timeout; 5958091Swpaul fd_set fds; 5961927Swollman 5978091Swpaul timeout.tv_sec = 5; 5988091Swpaul timeout.tv_usec = 0; 5991927Swollman 6008755Swpaul sprintf(buf, "%s", broad_domain->dom_domain); 6018755Swpaul if (write(BROADFD, &buf, sizeof(buf)) < 0) 6028091Swpaul return(1); 6031927Swollman 6048091Swpaul /* 6058091Swpaul * Stay in sync with parent: wait for it to read our first 6068091Swpaul * message before sending the second. 6078091Swpaul */ 6081927Swollman 6098091Swpaul FD_ZERO(&fds); 6108755Swpaul FD_SET(BROADFD, &fds); 6118091Swpaul if (select(FD_SETSIZE, NULL, &fds, NULL, &timeout) == -1) 6128091Swpaul return(1); 6138755Swpaul if (FD_ISSET(BROADFD, &fds)) { 6148755Swpaul if (write(BROADFD, addr, sizeof(struct sockaddr_in)) < 0) 6158091Swpaul return(1); 6168091Swpaul } else { 6178091Swpaul return(1); 6181927Swollman } 6191927Swollman 6208755Swpaul close(BROADFD); 6218091Swpaul return (0); 6228091Swpaul} 6231927Swollman 6248091Swpaulbool_t broadcast_result(out, addr) 6258091Swpaulbool_t *out; 6268091Swpaulstruct sockaddr_in *addr; 6278091Swpaul{ 6289600Swpaul if (retries >= MAX_RETRIES) { 6299600Swpaul bzero((char *)addr, sizeof(struct sockaddr_in)); 6309600Swpaul if (tell_parent(broad_domain->dom_domain, addr)) 6319600Swpaul syslog(LOG_WARNING, "lost connection to parent"); 6329600Swpaul return TRUE; 6339600Swpaul } 6349600Swpaul 6359600Swpaul if (yp_restricted && verify(addr->sin_addr)) { 6369600Swpaul retries++; 6379600Swpaul syslog(LOG_NOTICE, "NIS server at %s not in restricted mode access list -- rejecting.\n",inet_ntoa(addr->sin_addr)); 6389600Swpaul return FALSE; 6399600Swpaul } else { 6409600Swpaul if (tell_parent(broad_domain->dom_domain, addr)) 6419600Swpaul syslog(LOG_WARNING, "lost connection to parent"); 6429600Swpaul return TRUE; 6439600Swpaul } 6448091Swpaul} 6458091Swpaul 6468091Swpaul/* 6478091Swpaul * The right way to send RPC broadcasts. 6488091Swpaul * Use the clnt_broadcast() RPC service. Unfortunately, clnt_broadcast() 6498091Swpaul * blocks while waiting for replies, so we have to fork off seperate 6508091Swpaul * broadcaster processes that do the waiting and then transmit their 6518091Swpaul * results back to the parent for processing. We also have to remember 6528091Swpaul * to save the name of the domain we're trying to bind in a global 6538091Swpaul * variable since clnt_broadcast() provides no way to pass things to 6548091Swpaul * the 'eachresult' callback function. 6558091Swpaul */ 6568091Swpaulvoid 6578091Swpaulbroadcast(ypdb) 6588091Swpaulstruct _dom_binding *ypdb; 6598091Swpaul{ 6608091Swpaul bool_t out = FALSE; 6618091Swpaul enum clnt_stat stat; 6628091Swpaul 6638755Swpaul if (children >= MAX_CHILDREN || ypdb->dom_broadcast_pid) 6648091Swpaul return; 6658091Swpaul 6668755Swpaul if (pipe(ypdb->dom_pipe_fds) < 0) { 66721539Swpaul syslog(LOG_WARNING, "pipe: %m"); 6688091Swpaul return; 6691927Swollman } 6701927Swollman 67130762Scharnier if (ypdb->dom_vers == -1 && (long)ypdb->dom_server_addr.sin_addr.s_addr) 6728755Swpaul syslog(LOG_WARNING, "NIS server [%s] for domain \"%s\" not responding", 6738425Swpaul inet_ntoa(ypdb->dom_server_addr.sin_addr), ypdb->dom_domain); 6748425Swpaul 6758755Swpaul broad_domain = ypdb; 6768425Swpaul flock(ypdb->dom_lockfd, LOCK_UN); 6778425Swpaul 6788755Swpaul switch((ypdb->dom_broadcast_pid = fork())) { 6798091Swpaul case 0: 6808755Swpaul close(READFD); 68121539Swpaul signal(SIGCHLD, SIG_DFL); 68221539Swpaul signal(SIGTERM, SIG_DFL); 6838091Swpaul break; 6848091Swpaul case -1: 68521539Swpaul syslog(LOG_WARNING, "fork: %m"); 6868755Swpaul close(READFD); 6878755Swpaul close(WRITEFD); 6888091Swpaul return; 6898091Swpaul default: 6908755Swpaul close(WRITEFD); 6918755Swpaul FD_SET(READFD, &svc_fdset); 6928091Swpaul children++; 6938091Swpaul return; 6941927Swollman } 6956478Swpaul 6968755Swpaul /* Release all locks before doing anything else. */ 6978755Swpaul while(ypbindlist) { 6988755Swpaul close(ypbindlist->dom_lockfd); 6998755Swpaul ypbindlist = ypbindlist->dom_pnext; 7008755Swpaul } 7018755Swpaul close(yplockfd); 7028755Swpaul 70326135Swpaul /* 70426135Swpaul * Special 'many-cast' behavior. If we're in restricted mode, 70526135Swpaul * we have a list of possible server addresses to try. What 70626135Swpaul * we can do is transmit to each ypserv's YPPROC_DOMAIN_NONACK 70726135Swpaul * procedure and time the replies. Whoever replies fastest 70826135Swpaul * gets to be our server. Note that this is not a broadcast 70926135Swpaul * operation: we transmit uni-cast datagrams only. 71026135Swpaul */ 71126135Swpaul if (yp_restricted && yp_manycast) { 71226135Swpaul short port; 71326135Swpaul int i; 71426135Swpaul struct sockaddr_in sin; 71526135Swpaul 71626135Swpaul i = __yp_ping(restricted_addrs, yp_restricted, 71726135Swpaul ypdb->dom_domain, &port); 71826135Swpaul if (i == -1) { 71926135Swpaul bzero((char *)&ypdb->dom_server_addr, 72026135Swpaul sizeof(struct sockaddr_in)); 72126135Swpaul if (tell_parent(ypdb->dom_domain, 72226135Swpaul &ypdb->dom_server_addr)) 72326135Swpaul syslog(LOG_WARNING, "lost connection to parent"); 72426135Swpaul } else { 72526135Swpaul bzero((char *)&sin, sizeof(struct sockaddr_in)); 72626135Swpaul bcopy((char *)&restricted_addrs[i], 72726135Swpaul (char *)&sin.sin_addr, sizeof(struct in_addr)); 72826135Swpaul sin.sin_family = AF_INET; 72926135Swpaul sin.sin_port = port; 73026135Swpaul if (tell_parent(broad_domain->dom_domain, &sin)) 73126135Swpaul syslog(LOG_WARNING, 73226135Swpaul "lost connection to parent"); 73326135Swpaul } 73426135Swpaul _exit(0); 73526135Swpaul } 73626135Swpaul 7379600Swpaul retries = 0; 7389600Swpaul 73912862Swpaul { 74012862Swpaul char *ptr; 7418091Swpaul 74212862Swpaul ptr = (char *)&ypdb->dom_domain; 74312862Swpaul stat = clnt_broadcast(YPPROG, YPVERS, YPPROC_DOMAIN_NONACK, 74412862Swpaul xdr_domainname, (char *)&ptr, xdr_bool, (char *)&out, 74512862Swpaul broadcast_result); 74612862Swpaul } 74712862Swpaul 7488091Swpaul if (stat != RPC_SUCCESS) { 7498091Swpaul bzero((char *)&ypdb->dom_server_addr, 7508091Swpaul sizeof(struct sockaddr_in)); 7518755Swpaul if (tell_parent(ypdb->dom_domain, &ypdb->dom_server_addr)) 7528091Swpaul syslog(LOG_WARNING, "lost connection to parent"); 7538091Swpaul } 7548755Swpaul 75526135Swpaul _exit(0); 7561927Swollman} 7571927Swollman 7588091Swpaul/* 7598091Swpaul * The right way to check if a server is alive. 7608091Swpaul * Attempt to get a client handle pointing to the server and send a 7618755Swpaul * YPPROC_DOMAIN. If we can't get a handle or we get a reply of FALSE, 7628755Swpaul * we invalidate this binding entry and send out a broadcast to try to 7638755Swpaul * establish a new binding. Note that we treat non-default domains 7648091Swpaul * specially: once bound, we keep tabs on our server, but if it 7658091Swpaul * goes away and fails to respond after one round of broadcasting, we 7668091Swpaul * abandon it until a client specifically references it again. We make 7678091Swpaul * every effort to keep our default domain bound, however, since we 7688091Swpaul * need it to keep the system on its feet. 7698091Swpaul */ 7708091Swpaulint 7718425Swpaulping(ypdb) 7728091Swpaulstruct _dom_binding *ypdb; 7731927Swollman{ 7748091Swpaul bool_t out; 7758091Swpaul struct timeval interval, timeout; 7768091Swpaul enum clnt_stat stat; 7778091Swpaul int rpcsock = RPC_ANYSOCK; 7788755Swpaul CLIENT *client_handle; 7791927Swollman 7808755Swpaul interval.tv_sec = FAIL_THRESHOLD; 7818091Swpaul interval.tv_usec = 0; 7828091Swpaul timeout.tv_sec = FAIL_THRESHOLD; 7838091Swpaul timeout.tv_usec = 0; 7841927Swollman 7858755Swpaul if (ypdb->dom_broadcast_pid) 7868091Swpaul return(1); 7878091Swpaul 7888755Swpaul if ((client_handle = clntudp_bufcreate(&ypdb->dom_server_addr, 7898755Swpaul YPPROG, YPVERS, interval, &rpcsock, RPCSMALLMSGSIZE, 7908755Swpaul RPCSMALLMSGSIZE)) == (CLIENT *)NULL) { 7918755Swpaul /* Can't get a handle: we're dead. */ 7928755Swpaul ypdb->dom_alive = 0; 7938755Swpaul ypdb->dom_vers = -1; 7948755Swpaul broadcast(ypdb); 7958755Swpaul return(1); 7961927Swollman } 7971927Swollman 79812862Swpaul { 79912862Swpaul char *ptr; 80012862Swpaul 80112862Swpaul ptr = (char *)&ypdb->dom_domain; 80212862Swpaul 80312862Swpaul if ((stat = clnt_call(client_handle, YPPROC_DOMAIN, 80412862Swpaul xdr_domainname, (char *)&ptr, xdr_bool, (char *)&out, 80512862Swpaul timeout)) != RPC_SUCCESS || out == FALSE) { 80612862Swpaul ypdb->dom_alive = 0; 80712862Swpaul ypdb->dom_vers = -1; 80812862Swpaul clnt_destroy(client_handle); 80912862Swpaul broadcast(ypdb); 81012862Swpaul return(1); 81112862Swpaul } 8128091Swpaul } 8131927Swollman 8148755Swpaul clnt_destroy(client_handle); 8158091Swpaul return(0); 8161927Swollman} 8171927Swollman 8188091Swpaulvoid rpc_received(dom, raddrp, force) 8191927Swollmanchar *dom; 8201927Swollmanstruct sockaddr_in *raddrp; 8211927Swollmanint force; 8221927Swollman{ 8238425Swpaul struct _dom_binding *ypdb, *prev = NULL; 8241927Swollman struct iovec iov[2]; 8251927Swollman struct ypbind_resp ybr; 8261927Swollman char path[MAXPATHLEN]; 8271927Swollman int fd; 8281927Swollman 8296732Swpaul /*printf("returned from %s/%d about %s\n", inet_ntoa(raddrp->sin_addr), 8306732Swpaul ntohs(raddrp->sin_port), dom);*/ 8311927Swollman 8321927Swollman if(dom==NULL) 8331927Swollman return; 8341927Swollman 8358425Swpaul for(ypdb=ypbindlist; ypdb; ypdb=ypdb->dom_pnext) { 8368091Swpaul if( strcmp(ypdb->dom_domain, dom) == 0) 8378091Swpaul break; 8388425Swpaul prev = ypdb; 8398425Swpaul } 8408091Swpaul 8418755Swpaul if (ypdb && force) { 8428755Swpaul if (ypdb->dom_broadcast_pid) { 8438755Swpaul kill(ypdb->dom_broadcast_pid, SIGINT); 8448755Swpaul close(READFD); 8458853Swpaul FD_CLR(READFD, &fdsr); 8468853Swpaul FD_CLR(READFD, &svc_fdset); 8478853Swpaul READFD = WRITEFD = -1; 8488755Swpaul } 8498755Swpaul } 8508755Swpaul 8519600Swpaul /* if in secure mode, check originating port number */ 8529600Swpaul if ((ypsecuremode && (ntohs(raddrp->sin_port) >= IPPORT_RESERVED))) { 8536732Swpaul syslog(LOG_WARNING, "Rejected NIS server on [%s/%d] for domain %s.", 8546732Swpaul inet_ntoa(raddrp->sin_addr), ntohs(raddrp->sin_port), 8556732Swpaul dom); 8568246Swpaul if (ypdb != NULL) { 8578755Swpaul ypdb->dom_broadcast_pid = 0; 8588246Swpaul ypdb->dom_alive = 0; 8598246Swpaul } 8606732Swpaul return; 8616732Swpaul } 8626732Swpaul 8638246Swpaul if (raddrp->sin_addr.s_addr == (long)0) { 8648755Swpaul switch(ypdb->dom_default) { 8658755Swpaul case 0: 8668755Swpaul if (prev == NULL) 8678755Swpaul ypbindlist = ypdb->dom_pnext; 8688755Swpaul else 8698755Swpaul prev->dom_pnext = ypdb->dom_pnext; 8708755Swpaul sprintf(path, "%s/%s.%ld", BINDINGDIR, 8718755Swpaul ypdb->dom_domain, YPVERS); 8728755Swpaul close(ypdb->dom_lockfd); 8738755Swpaul unlink(path); 8748755Swpaul free(ypdb); 8758755Swpaul domains--; 8768755Swpaul return; 8778755Swpaul case 1: 8788755Swpaul ypdb->dom_broadcast_pid = 0; 8798755Swpaul ypdb->dom_alive = 0; 8808755Swpaul broadcast(ypdb); 8818755Swpaul return; 8828755Swpaul default: 8838755Swpaul break; 8848755Swpaul } 8858246Swpaul } 8868246Swpaul 8871927Swollman if(ypdb==NULL) { 8888246Swpaul if (force == 0) 8891927Swollman return; 8901927Swollman ypdb = (struct _dom_binding *)malloc(sizeof *ypdb); 8918857Srgrimes if (ypdb == NULL) { 89221539Swpaul syslog(LOG_WARNING, "malloc: %m"); 8938246Swpaul return; 8948246Swpaul } 8951927Swollman bzero((char *)ypdb, sizeof *ypdb); 8961927Swollman strncpy(ypdb->dom_domain, dom, sizeof ypdb->dom_domain); 8971927Swollman ypdb->dom_lockfd = -1; 8988091Swpaul ypdb->dom_default = 0; 8991927Swollman ypdb->dom_pnext = ypbindlist; 9001927Swollman ypbindlist = ypdb; 9011927Swollman } 9021927Swollman 9038091Swpaul /* We've recovered from a crash: inform the world. */ 90430762Scharnier if (ypdb->dom_vers == -1 && ypdb->dom_server_addr.sin_addr.s_addr) 9058755Swpaul syslog(LOG_WARNING, "NIS server [%s] for domain \"%s\" OK", 9068755Swpaul inet_ntoa(raddrp->sin_addr), ypdb->dom_domain); 9076478Swpaul 9081927Swollman bcopy((char *)raddrp, (char *)&ypdb->dom_server_addr, 9091927Swollman sizeof ypdb->dom_server_addr); 9106478Swpaul 9111927Swollman ypdb->dom_vers = YPVERS; 9121927Swollman ypdb->dom_alive = 1; 9138755Swpaul ypdb->dom_broadcast_pid = 0; 9141927Swollman 9151927Swollman if(ypdb->dom_lockfd != -1) 9161927Swollman close(ypdb->dom_lockfd); 9171927Swollman 9188091Swpaul sprintf(path, "%s/%s.%ld", BINDINGDIR, 9191927Swollman ypdb->dom_domain, ypdb->dom_vers); 9201927Swollman#ifdef O_SHLOCK 9217864Swpaul if( (fd=open(path, O_CREAT|O_SHLOCK|O_RDWR|O_TRUNC, 0644)) == -1) { 9221927Swollman (void)mkdir(BINDINGDIR, 0755); 9237864Swpaul if( (fd=open(path, O_CREAT|O_SHLOCK|O_RDWR|O_TRUNC, 0644)) == -1) 9241927Swollman return; 9251927Swollman } 9261927Swollman#else 9277864Swpaul if( (fd=open(path, O_CREAT|O_RDWR|O_TRUNC, 0644)) == -1) { 9281927Swollman (void)mkdir(BINDINGDIR, 0755); 9297864Swpaul if( (fd=open(path, O_CREAT|O_RDWR|O_TRUNC, 0644)) == -1) 9301927Swollman return; 9311927Swollman } 9321927Swollman flock(fd, LOCK_SH); 9331927Swollman#endif 9341927Swollman 9351927Swollman /* 9361927Swollman * ok, if BINDINGDIR exists, and we can create the binding file, 9371927Swollman * then write to it.. 9381927Swollman */ 9391927Swollman ypdb->dom_lockfd = fd; 9401927Swollman 9411927Swollman iov[0].iov_base = (caddr_t)&(udptransp->xp_port); 9421927Swollman iov[0].iov_len = sizeof udptransp->xp_port; 9431927Swollman iov[1].iov_base = (caddr_t)&ybr; 9441927Swollman iov[1].iov_len = sizeof ybr; 9451927Swollman 9461927Swollman bzero(&ybr, sizeof ybr); 9471927Swollman ybr.ypbind_status = YPBIND_SUCC_VAL; 94812862Swpaul *(u_long *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_addr = raddrp->sin_addr.s_addr; 94912862Swpaul *(u_short *)&ybr.ypbind_resp_u.ypbind_bindinfo.ypbind_binding_port = raddrp->sin_port; 9501927Swollman 9511927Swollman if( writev(ypdb->dom_lockfd, iov, 2) != iov[0].iov_len + iov[1].iov_len) { 95221539Swpaul syslog(LOG_WARNING, "write: %m"); 9531927Swollman close(ypdb->dom_lockfd); 9541927Swollman ypdb->dom_lockfd = -1; 9551927Swollman return; 9561927Swollman } 9571927Swollman} 9589600Swpaul 9599600Swpaul/* 9609600Swpaul * Check address against list of allowed servers. Return 0 if okay, 9619600Swpaul * 1 if not matched. 9629600Swpaul */ 9639600Swpaulint 9649600Swpaulverify(addr) 9659600Swpaulstruct in_addr addr; 9669600Swpaul{ 9679600Swpaul int i; 9689600Swpaul 9699600Swpaul for (i = 0; i < RESTRICTED_SERVERS; i++) 9709600Swpaul if (!bcmp((char *)&addr, (char *)&restricted_addrs[i], 9719600Swpaul sizeof(struct in_addr))) 9729600Swpaul return(0); 9739600Swpaul 9749600Swpaul return(1); 9759600Swpaul} 9769600Swpaul 9779600Swpaul/* 9789600Swpaul * Try to set restricted mode. We default to normal mode if we can't 9799600Swpaul * resolve the specified hostnames. 9809600Swpaul */ 9819600Swpaulvoid 9829600Swpaulyp_restricted_mode(args) 9839600Swpaulchar *args; 9849600Swpaul{ 9859600Swpaul struct hostent *h; 9869600Swpaul int i = 0; 9879600Swpaul char *s; 9889600Swpaul 9899600Swpaul /* Find the restricted domain. */ 9909600Swpaul if ((s = strsep(&args, ",")) == NULL) 9919600Swpaul return; 99212862Swpaul domain_name = s; 9939600Swpaul 9949600Swpaul /* Get the addresses of the servers. */ 9959600Swpaul while ((s = strsep(&args, ",")) != NULL && i < RESTRICTED_SERVERS) { 9969600Swpaul if ((h = gethostbyname(s)) == NULL) 9979600Swpaul return; 9989600Swpaul bcopy ((char *)h->h_addr_list[0], (char *)&restricted_addrs[i], 9999600Swpaul sizeof(struct in_addr)); 10009600Swpaul i++; 10019600Swpaul } 10029600Swpaul 10039600Swpaul /* ypset and ypsetme not allowed with restricted mode */ 10049600Swpaul ypsetmode = YPSET_NO; 10059600Swpaul 100626135Swpaul yp_restricted = i; 10079600Swpaul return; 10089600Swpaul} 1009