yp_server.c revision 13375
112891Swpaul/* 212891Swpaul * Copyright (c) 1995 312891Swpaul * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 412891Swpaul * 512891Swpaul * Redistribution and use in source and binary forms, with or without 612891Swpaul * modification, are permitted provided that the following conditions 712891Swpaul * are met: 812891Swpaul * 1. Redistributions of source code must retain the above copyright 912891Swpaul * notice, this list of conditions and the following disclaimer. 1012891Swpaul * 2. Redistributions in binary form must reproduce the above copyright 1112891Swpaul * notice, this list of conditions and the following disclaimer in the 1212891Swpaul * documentation and/or other materials provided with the distribution. 1312891Swpaul * 3. All advertising materials mentioning features or use of this software 1412891Swpaul * must display the following acknowledgement: 1512891Swpaul * This product includes software developed by Bill Paul. 1612891Swpaul * 4. Neither the name of the author nor the names of any co-contributors 1712891Swpaul * may be used to endorse or promote products derived from this software 1812891Swpaul * without specific prior written permission. 1912891Swpaul * 2012891Swpaul * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 2112891Swpaul * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2212891Swpaul * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2312891Swpaul * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR CONTRIBUTORS BE LIABLE 2412891Swpaul * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2512891Swpaul * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2612891Swpaul * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2712891Swpaul * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2812891Swpaul * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2912891Swpaul * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3012891Swpaul * SUCH DAMAGE. 3112891Swpaul * 3212891Swpaul */ 3312891Swpaul 3412891Swpaul#include "yp_extern.h" 3512891Swpaul#include "yp.h" 3612891Swpaul#include <stdlib.h> 3712891Swpaul#include <dirent.h> 3812891Swpaul#include <sys/stat.h> 3912891Swpaul#include <sys/param.h> 4012891Swpaul#include <errno.h> 4112891Swpaul#include <sys/types.h> 4212891Swpaul#include <sys/socket.h> 4312891Swpaul#include <netinet/in.h> 4412891Swpaul#include <arpa/inet.h> 4512997Swpaul#include <rpc/rpc.h> 4612891Swpaul 4712891Swpaul#ifndef lint 4813375Swpaulstatic char rcsid[] = "$Id: yp_server.c,v 1.2 1995/12/23 21:35:35 wpaul Exp $"; 4912891Swpaul#endif /* not lint */ 5012891Swpaul 5112891Swpaulint forked = 0; 5212891Swpaulint children = 0; 5312891SwpaulDB *spec_dbp = NULL; /* Special global DB handle for ypproc_all. */ 5412891Swpaul 5512891Swpaulvoid * 5612891Swpaulypproc_null_2_svc(void *argp, struct svc_req *rqstp) 5712891Swpaul{ 5812891Swpaul static char * result; 5912891Swpaul static char rval = 0; 6012891Swpaul 6112891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) 6212891Swpaul return(NULL); 6312891Swpaul 6412891Swpaul result = &rval; 6512891Swpaul 6612891Swpaul return((void *) &result); 6712891Swpaul} 6812891Swpaul 6912891Swpaulbool_t * 7012891Swpaulypproc_domain_2_svc(domainname *argp, struct svc_req *rqstp) 7112891Swpaul{ 7212891Swpaul static bool_t result; 7312891Swpaul 7412891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) { 7512891Swpaul result = FALSE; 7612891Swpaul return (&result); 7712891Swpaul } 7812891Swpaul 7912891Swpaul if (argp == NULL || yp_validdomain(*argp)) 8012891Swpaul result = FALSE; 8112891Swpaul else 8212891Swpaul result = TRUE; 8312891Swpaul 8412891Swpaul return (&result); 8512891Swpaul} 8612891Swpaul 8712891Swpaulbool_t * 8812891Swpaulypproc_domain_nonack_2_svc(domainname *argp, struct svc_req *rqstp) 8912891Swpaul{ 9012891Swpaul static bool_t result; 9112891Swpaul 9212891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) 9312891Swpaul return (NULL); 9412891Swpaul 9512891Swpaul if (argp == NULL || yp_validdomain(*argp)) 9612891Swpaul return (NULL); 9712891Swpaul else 9812891Swpaul result = TRUE; 9912891Swpaul 10012891Swpaul return (&result); 10112891Swpaul} 10212891Swpaul 10312891Swpaulypresp_val * 10412891Swpaulypproc_match_2_svc(ypreq_key *argp, struct svc_req *rqstp) 10512891Swpaul{ 10612891Swpaul static ypresp_val result; 10712891Swpaul DBT key, data; 10812891Swpaul 10912891Swpaul if (yp_access(argp->map, (struct svc_req *)rqstp)) { 11012891Swpaul result.stat = YP_YPERR; 11112891Swpaul return (&result); 11212891Swpaul } 11312891Swpaul 11412891Swpaul if (argp->domain == NULL || argp->map == NULL) { 11512891Swpaul result.stat = YP_BADARGS; 11612891Swpaul return (&result); 11712891Swpaul } 11812891Swpaul 11912891Swpaul if (yp_validdomain(argp->domain)) { 12012891Swpaul result.stat = YP_NODOM; 12112891Swpaul return(&result); 12212891Swpaul } 12312891Swpaul 12412891Swpaul key.size = argp->key.keydat_len; 12512891Swpaul key.data = argp->key.keydat_val; 12612891Swpaul 12712891Swpaul result.stat = yp_get_record(argp->domain, argp->map, &key, &data, 0); 12812891Swpaul 12912891Swpaul if (result.stat == YP_TRUE) { 13012891Swpaul result.val.valdat_len = data.size; 13112891Swpaul result.val.valdat_val = data.data; 13212891Swpaul } 13312891Swpaul 13412891Swpaul /* 13512891Swpaul * Do DNS lookups for hosts maps if database lookup failed. 13612891Swpaul */ 13712891Swpaul 13812891Swpaul if (do_dns && result.stat != YP_TRUE && strstr(argp->map, "hosts")) { 13912997Swpaul char *rval = NULL; 14012891Swpaul 14112891Swpaul /* DNS lookups can take time -- do them in a subprocess */ 14212891Swpaul 14312891Swpaul if (!debug && children < MAX_CHILDREN && fork()) { 14412891Swpaul children++; 14512891Swpaul forked = 0; 14612891Swpaul /* 14712891Swpaul * Returning NULL here prevents svc_sendreply() 14812891Swpaul * from being called by the parent. This is vital 14912891Swpaul * since having both the parent and the child process 15012891Swpaul * call it would confuse the client. 15112891Swpaul */ 15212891Swpaul return (NULL); 15312891Swpaul } else { 15412891Swpaul forked++; 15512891Swpaul } 15612891Swpaul 15712891Swpaul if (debug) 15812891Swpaul yp_error("Doing DNS lookup of %.*s", 15912891Swpaul argp->key.keydat_len, 16012891Swpaul argp->key.keydat_val); 16112891Swpaul 16212891Swpaul /* NUL terminate! NUL terminate!! NUL TERMINATE!!! */ 16312891Swpaul argp->key.keydat_val[argp->key.keydat_len] = '\0'; 16412891Swpaul 16512891Swpaul if (!strcmp(argp->map, "hosts.byname")) 16612891Swpaul rval = yp_dnsname((char *)argp->key.keydat_val); 16712891Swpaul else if (!strcmp(argp->map, "hosts.byaddr")) 16812891Swpaul rval = yp_dnsaddr((const char *)argp->key.keydat_val); 16912891Swpaul 17012891Swpaul 17112891Swpaul if (rval) { 17212891Swpaul if (debug) 17312891Swpaul yp_error("DNS lookup successful. Result: %s", rval); 17412891Swpaul result.val.valdat_len = strlen(rval); 17512891Swpaul result.val.valdat_val = rval; 17612891Swpaul result.stat = YP_TRUE; 17712891Swpaul } else { 17812891Swpaul if (debug) 17912891Swpaul yp_error("DNS lookup failed."); 18012891Swpaul result.stat = YP_NOKEY; 18112891Swpaul } 18212891Swpaul } 18312891Swpaul 18412891Swpaul return (&result); 18512891Swpaul} 18612891Swpaul 18712891Swpaulypresp_key_val * 18812891Swpaulypproc_first_2_svc(ypreq_nokey *argp, struct svc_req *rqstp) 18912891Swpaul{ 19012891Swpaul static ypresp_key_val result; 19112891Swpaul DBT key, data; 19212891Swpaul DB *dbp; 19312891Swpaul 19412891Swpaul if (yp_access(argp->map, (struct svc_req *)rqstp)) { 19512891Swpaul result.stat = YP_YPERR; 19612891Swpaul return (&result); 19712891Swpaul } 19812891Swpaul 19912891Swpaul if (argp->domain == NULL) { 20012891Swpaul result.stat = YP_BADARGS; 20112891Swpaul return (&result); 20212891Swpaul } 20312891Swpaul 20412891Swpaul if (yp_validdomain(argp->domain)) { 20512891Swpaul result.stat = YP_NODOM; 20612891Swpaul return(&result); 20712891Swpaul } 20812891Swpaul 20912891Swpaul if ((dbp = yp_open_db(argp->domain, argp->map)) == NULL) { 21012891Swpaul result.stat = yp_errno; 21112891Swpaul return(&result); 21212891Swpaul } 21312891Swpaul 21412891Swpaul key.data = NULL; 21512891Swpaul key.size = 0; 21612891Swpaul result.stat = yp_first_record(dbp, &key, &data); 21712891Swpaul (void)(dbp->close)(dbp); 21812891Swpaul 21912891Swpaul if (result.stat == YP_TRUE) { 22012891Swpaul result.key.keydat_len = key.size; 22112891Swpaul result.key.keydat_val = key.data; 22212891Swpaul result.val.valdat_len = data.size; 22312891Swpaul result.val.valdat_val = data.data; 22412891Swpaul } 22512891Swpaul 22612891Swpaul return (&result); 22712891Swpaul} 22812891Swpaul 22912891Swpaulypresp_key_val * 23012891Swpaulypproc_next_2_svc(ypreq_key *argp, struct svc_req *rqstp) 23112891Swpaul{ 23212891Swpaul static ypresp_key_val result; 23312891Swpaul DBT key, data; 23412891Swpaul DB *dbp; 23512891Swpaul 23612891Swpaul if (yp_access(argp->map, (struct svc_req *)rqstp)) { 23712891Swpaul result.stat = YP_YPERR; 23812891Swpaul return (&result); 23912891Swpaul } 24012891Swpaul 24112891Swpaul if (argp->domain == NULL || argp->map == NULL) { 24212891Swpaul result.stat = YP_BADARGS; 24312891Swpaul return (&result); 24412891Swpaul } 24512891Swpaul 24612891Swpaul if (yp_validdomain(argp->domain)) { 24712891Swpaul result.stat = YP_NODOM; 24812891Swpaul return(&result); 24912891Swpaul } 25012891Swpaul 25112891Swpaul if ((dbp = yp_open_db(argp->domain, argp->map)) == NULL) { 25212891Swpaul result.stat = yp_errno; 25312891Swpaul return(&result); 25412891Swpaul } 25512891Swpaul 25612891Swpaul key.size = argp->key.keydat_len; 25712891Swpaul key.data = argp->key.keydat_val; 25812891Swpaul 25912891Swpaul result.stat = yp_next_record(dbp, &key, &data, 0); 26012891Swpaul (void)(dbp->close)(dbp); 26112891Swpaul 26212891Swpaul if (result.stat == YP_TRUE) { 26312891Swpaul result.key.keydat_len = key.size; 26412891Swpaul result.key.keydat_val = key.data; 26512891Swpaul result.val.valdat_len = data.size; 26612891Swpaul result.val.valdat_val = data.data; 26712891Swpaul } 26812891Swpaul 26912891Swpaul return (&result); 27012891Swpaul} 27112891Swpaul 27212997Swpaulstatic void ypxfr_callback(rval,addr,transid,prognum,port) 27312997Swpaul ypxfrstat rval; 27412997Swpaul struct sockaddr_in *addr; 27512997Swpaul unsigned int transid; 27612997Swpaul unsigned int prognum; 27712997Swpaul unsigned long port; 27812997Swpaul{ 27912997Swpaul CLIENT *clnt; 28012997Swpaul int sock = RPC_ANYSOCK; 28112997Swpaul struct timeval timeout; 28212997Swpaul yppushresp_xfr ypxfr_resp; 28313375Swpaul struct rpc_err err; 28412997Swpaul 28513375Swpaul timeout.tv_sec = 5; 28612997Swpaul timeout.tv_usec = 0; 28712997Swpaul addr->sin_port = htons(port); 28812997Swpaul 28912997Swpaul if ((clnt = clntudp_create(addr, prognum, 1, timeout, &sock)) == NULL) 29012997Swpaul yp_error("%s", clnt_spcreateerror("failed to establish \ 29112997Swpaulcallback handle")); 29212997Swpaul 29312997Swpaul ypxfr_resp.status = rval; 29412997Swpaul ypxfr_resp.transid = transid; 29512997Swpaul 29613375Swpaul /* Turn the timeout off -- we don't want to block. */ 29713375Swpaul timeout.tv_sec = 0; 29813375Swpaul if (clnt_control(clnt, CLSET_TIMEOUT, (char *)&timeout) == FALSE) 29913375Swpaul yp_error("failed to set timeout on ypproc_xfr callback"); 30012997Swpaul 30113375Swpaul if (yppushproc_xfrresp_1(&ypxfr_resp, clnt) == NULL) { 30213375Swpaul clnt_geterr(clnt, &err); 30313375Swpaul if (err.re_status != RPC_SUCCESS && 30413375Swpaul err.re_status != RPC_TIMEDOUT) 30513375Swpaul yp_error("%s", clnt_sperror(clnt, 30613375Swpaul "ypxfr callback failed")); 30713375Swpaul } 30813375Swpaul 30912997Swpaul clnt_destroy(clnt); 31012997Swpaul return; 31112997Swpaul} 31212997Swpaul 31312891Swpaulypresp_xfr * 31412891Swpaulypproc_xfr_2_svc(ypreq_xfr *argp, struct svc_req *rqstp) 31512891Swpaul{ 31612891Swpaul static ypresp_xfr result; 31712997Swpaul struct sockaddr_in *rqhost; 31812891Swpaul 31913375Swpaul result.transid = argp->transid; 32013375Swpaul rqhost = svc_getcaller(rqstp->rq_xprt); 32113375Swpaul 32212891Swpaul if (yp_access(argp->map_parms.map, (struct svc_req *)rqstp)) { 32313375Swpaul /* Order is important: send regular RPC reply, then callback */ 32412891Swpaul result.xfrstat = YPXFR_REFUSED; 32513375Swpaul svc_sendreply(rqstp->rq_xprt, xdr_ypresp_xfr, (char *)&result); 32613375Swpaul ypxfr_callback(YPXFR_REFUSED,rqhost,argp->transid, 32713375Swpaul argp->prog,argp->port); 32813375Swpaul return(NULL); 32912891Swpaul } 33012891Swpaul 33112891Swpaul if (argp->map_parms.domain == NULL) { 33212891Swpaul result.xfrstat = YPXFR_BADARGS; 33313375Swpaul svc_sendreply(rqstp->rq_xprt, xdr_ypresp_xfr, (char *)&result); 33413375Swpaul ypxfr_callback(YPXFR_BADARGS,rqhost,argp->transid, 33513375Swpaul argp->prog,argp->port); 33613375Swpaul return(NULL); 33712891Swpaul } 33812891Swpaul 33912891Swpaul if (yp_validdomain(argp->map_parms.domain)) { 34012891Swpaul result.xfrstat = YPXFR_NODOM; 34113375Swpaul svc_sendreply(rqstp->rq_xprt, xdr_ypresp_xfr, (char *)&result); 34213375Swpaul ypxfr_callback(YPXFR_NODOM,rqhost,argp->transid, 34313375Swpaul argp->prog,argp->port); 34413375Swpaul return(NULL); 34512891Swpaul } 34612891Swpaul 34712891Swpaul switch(fork()) { 34812891Swpaul case 0: 34912891Swpaul { 35012891Swpaul char g[11], t[11], p[11]; 35112891Swpaul char ypxfr_command[MAXPATHLEN + 2]; 35212891Swpaul 35312891Swpaul sprintf (ypxfr_command, "%sypxfr", _PATH_LIBEXEC); 35412891Swpaul sprintf (t, "%u", argp->transid); 35512891Swpaul sprintf (g, "%u", argp->prog); 35612891Swpaul sprintf (p, "%u", argp->port); 35712997Swpaul if (debug) 35812997Swpaul close(0); close(1); close(2); 35912997Swpaul if (strcmp(yp_dir, _PATH_YP)) { 36012997Swpaul execl(ypxfr_command, "ypxfr", "-d", argp->map_parms.domain, 36113375Swpaul "-h", argp->map_parms.peer, "-p", yp_dir, "-C", t, 36212997Swpaul g, inet_ntoa(rqhost->sin_addr), p, argp->map_parms.map, 36312997Swpaul NULL); 36412997Swpaul } else { 36512997Swpaul execl(ypxfr_command, "ypxfr", "-d", argp->map_parms.domain, 36613375Swpaul "-h", argp->map_parms.peer, "-C", t, g, 36712997Swpaul inet_ntoa(rqhost->sin_addr), p, argp->map_parms.map, 36812997Swpaul NULL); 36912997Swpaul } 37012997Swpaul forked++; 37113375Swpaul result.xfrstat = YPXFR_XFRERR; 37212891Swpaul yp_error("ypxfr execl(): %s", strerror(errno)); 37313375Swpaul svc_sendreply(rqstp->rq_xprt, xdr_ypresp_xfr, (char *)&result); 37412997Swpaul ypxfr_callback(YPXFR_XFRERR,rqhost,argp->transid, 37512997Swpaul argp->prog,argp->port); 37613375Swpaul return(NULL); 37712997Swpaul break; 37812891Swpaul } 37912891Swpaul case -1: 38012891Swpaul yp_error("ypxfr fork(): %s", strerror(errno)); 38113375Swpaul result.xfrstat = YPXFR_XFRERR; 38213375Swpaul svc_sendreply(rqstp->rq_xprt, xdr_ypresp_xfr, (char *)&result); 38312997Swpaul ypxfr_callback(YPXFR_XFRERR,rqhost,argp->transid, 38412997Swpaul argp->prog,argp->port); 38513375Swpaul return(NULL); 38612891Swpaul break; 38712891Swpaul default: 38813375Swpaul result.xfrstat = YPXFR_SUCC; 38912997Swpaul children++; 39012997Swpaul forked = 0; 39112891Swpaul break; 39212891Swpaul } 39313375Swpaul 39413375Swpaul return (&result); 39512891Swpaul} 39612891Swpaul 39712891Swpaulvoid * 39812891Swpaulypproc_clear_2_svc(void *argp, struct svc_req *rqstp) 39912891Swpaul{ 40012891Swpaul static char * result; 40112891Swpaul static char rval = 0; 40212891Swpaul 40312891Swpaul /* 40412891Swpaul * We don't have to do anything for ypproc_clear. Unlike 40512891Swpaul * the SunOS ypserv, we don't hold out database descriptors 40612891Swpaul * open forever. 40712891Swpaul */ 40812891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) 40912891Swpaul return (NULL); 41012891Swpaul 41112891Swpaul result = &rval; 41212891Swpaul return((void *) &result); 41312891Swpaul} 41412891Swpaul 41512891Swpaul/* 41612891Swpaul * For ypproc_all, we have to send a stream of ypresp_all structures 41712891Swpaul * via TCP, but the XDR filter generated from the yp.x protocol 41812891Swpaul * definition file only serializes one such structure. This means that 41912891Swpaul * to send the whole stream, you need a wrapper which feeds all the 42012891Swpaul * records into the underlying XDR routine until it hits an 'EOF.' 42112891Swpaul * But to use the wrapper, you have to violate the boundaries between 42212891Swpaul * RPC layers by calling svc_sendreply() directly from the ypproc_all 42312891Swpaul * service routine instead of letting the RPC dispatcher do it. 42412891Swpaul * 42512891Swpaul * Bleah. 42612891Swpaul */ 42712891Swpaul 42812891Swpaul/* 42912891Swpaul * Custom XDR routine for serialzing results of ypproc_all: keep 43012891Swpaul * reading from the database and spew until we run out of records 43112891Swpaul * or encounter an error. 43212891Swpaul */ 43312891Swpaulstatic bool_t 43412891Swpaulxdr_my_ypresp_all(register XDR *xdrs, ypresp_all *objp) 43512891Swpaul{ 43612891Swpaul DBT key, data; 43712891Swpaul 43812891Swpaul while (1) { 43912891Swpaul /* Get a record. */ 44012891Swpaul key.size = objp->ypresp_all_u.val.key.keydat_len; 44112891Swpaul key.data = objp->ypresp_all_u.val.key.keydat_val; 44212891Swpaul 44312891Swpaul if ((objp->ypresp_all_u.val.stat = 44412891Swpaul yp_next_record(spec_dbp,&key,&data,1)) == YP_TRUE) { 44512891Swpaul objp->ypresp_all_u.val.val.valdat_len = data.size; 44612891Swpaul objp->ypresp_all_u.val.val.valdat_val = data.data; 44712891Swpaul objp->ypresp_all_u.val.key.keydat_len = key.size; 44812891Swpaul objp->ypresp_all_u.val.key.keydat_val = key.data; 44912891Swpaul objp->more = TRUE; 45012891Swpaul } else { 45112891Swpaul objp->more = FALSE; 45212891Swpaul } 45312891Swpaul 45412891Swpaul /* Serialize. */ 45512891Swpaul if (!xdr_ypresp_all(xdrs, objp)) 45612891Swpaul return(FALSE); 45712891Swpaul if (objp->more == FALSE) 45812891Swpaul return(TRUE); 45912891Swpaul } 46012891Swpaul} 46112891Swpaul 46212891Swpaulypresp_all * 46312891Swpaulypproc_all_2_svc(ypreq_nokey *argp, struct svc_req *rqstp) 46412891Swpaul{ 46512891Swpaul static ypresp_all result; 46612891Swpaul 46712891Swpaul /* 46812891Swpaul * Set this here so that the client will be forced to make 46912891Swpaul * at least one attempt to read from us even if all we're 47012891Swpaul * doing is returning an error. 47112891Swpaul */ 47212891Swpaul result.more = TRUE; 47312891Swpaul 47412891Swpaul if (yp_access(argp->map, (struct svc_req *)rqstp)) { 47512891Swpaul result.ypresp_all_u.val.stat = YP_YPERR; 47612891Swpaul return (&result); 47712891Swpaul } 47812891Swpaul 47912891Swpaul if (argp->domain == NULL || argp->map == NULL) { 48012891Swpaul result.ypresp_all_u.val.stat = YP_BADARGS; 48112891Swpaul return (&result); 48212891Swpaul } 48312891Swpaul 48412891Swpaul if (yp_validdomain(argp->domain)) { 48512891Swpaul result.ypresp_all_u.val.stat = YP_NODOM; 48612891Swpaul return(&result); 48712891Swpaul } 48812891Swpaul 48912891Swpaul /* 49012891Swpaul * The ypproc_all procedure can take a while to complete. 49112891Swpaul * Best to handle it in a subprocess so the parent doesn't 49212891Swpaul * block. We fork() here so we don't end up sharing a 49312891Swpaul * DB file handle with the parent. 49412891Swpaul */ 49512891Swpaul 49612891Swpaul if (!debug && children < MAX_CHILDREN && fork()) { 49712891Swpaul children++; 49812891Swpaul forked = 0; 49912891Swpaul return (NULL); 50012891Swpaul } else { 50112891Swpaul forked++; 50212891Swpaul } 50312891Swpaul 50412891Swpaul if ((spec_dbp = yp_open_db(argp->domain, argp->map)) == NULL) { 50512891Swpaul result.ypresp_all_u.val.stat = yp_errno; 50612891Swpaul return(&result); 50712891Swpaul } 50812891Swpaul 50912891Swpaul /* Kick off the actual data transfer. */ 51012891Swpaul svc_sendreply(rqstp->rq_xprt, xdr_my_ypresp_all, (char *)&result); 51112891Swpaul 51212891Swpaul /* Close database when done. */ 51312891Swpaul (void)(spec_dbp->close)(spec_dbp); 51412891Swpaul 51512891Swpaul /* 51612891Swpaul * Returning NULL prevents the dispatcher from calling 51712891Swpaul * svc_sendreply() since we already did it. 51812891Swpaul */ 51912891Swpaul return (NULL); 52012891Swpaul} 52112891Swpaul 52212891Swpaulypresp_master * 52312891Swpaulypproc_master_2_svc(ypreq_nokey *argp, struct svc_req *rqstp) 52412891Swpaul{ 52512891Swpaul static ypresp_master result; 52612891Swpaul DBT key,data; 52712891Swpaul 52812891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) { 52912891Swpaul result.stat = YP_YPERR; 53012891Swpaul return(&result); 53112891Swpaul } 53212891Swpaul 53312891Swpaul if (argp->domain == NULL) { 53412891Swpaul result.stat = YP_BADARGS; 53512891Swpaul return (&result); 53612891Swpaul } 53712891Swpaul 53812891Swpaul if (yp_validdomain(argp->domain)) { 53912891Swpaul result.stat = YP_NODOM; 54012891Swpaul return (&result); 54112891Swpaul } 54212891Swpaul 54312891Swpaul key.data = "YP_MASTER_NAME"; 54412891Swpaul key.size = sizeof("YP_MASTER_NAME") - 1; 54512891Swpaul 54612891Swpaul result.stat = yp_get_record(argp->domain, argp->map, &key, &data, 1); 54712891Swpaul 54812891Swpaul if (result.stat == YP_TRUE) { 54912891Swpaul result.peer = (char *)data.data; 55012891Swpaul result.peer[data.size] = '\0'; 55112891Swpaul } else 55212891Swpaul result.peer = ""; 55312891Swpaul 55412891Swpaul return (&result); 55512891Swpaul} 55612891Swpaul 55712891Swpaulypresp_order * 55812891Swpaulypproc_order_2_svc(ypreq_nokey *argp, struct svc_req *rqstp) 55912891Swpaul{ 56012891Swpaul static ypresp_order result; 56112891Swpaul DBT key,data; 56212891Swpaul 56312891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) { 56412891Swpaul result.stat = YP_YPERR; 56512891Swpaul return(&result); 56612891Swpaul } 56712891Swpaul 56812891Swpaul if (argp->domain == NULL) { 56912891Swpaul result.stat = YP_BADARGS; 57012891Swpaul return (&result); 57112891Swpaul } 57212891Swpaul 57312891Swpaul if (yp_validdomain(argp->domain)) { 57412891Swpaul result.stat = YP_NODOM; 57512891Swpaul return (&result); 57612891Swpaul } 57712891Swpaul 57812891Swpaul /* 57912891Swpaul * We could just check the timestamp on the map file, 58012891Swpaul * but that's a hack: we'll only know the last time the file 58112891Swpaul * was touched, not the last time the database contents were 58212891Swpaul * updated. 58312891Swpaul */ 58412891Swpaul key.data = "YP_LAST_MODIFIED"; 58512891Swpaul key.size = sizeof("YP_LAST_MODIFIED") - 1; 58612891Swpaul 58712891Swpaul result.stat = yp_get_record(argp->domain, argp->map, &key, &data, 1); 58812891Swpaul 58912891Swpaul if (result.stat == YP_TRUE) 59012891Swpaul result.ordernum = atoi((char *)data.data); 59112891Swpaul else 59212891Swpaul result.ordernum = 0; 59312891Swpaul 59412891Swpaul return (&result); 59512891Swpaul} 59612891Swpaul 59712891Swpaulstatic void yp_maplist_free(yp_maplist) 59812891Swpaul struct ypmaplist *yp_maplist; 59912891Swpaul{ 60012891Swpaul register struct ypmaplist *next; 60112891Swpaul 60212891Swpaul while(yp_maplist) { 60312891Swpaul next = yp_maplist->next; 60412891Swpaul free(yp_maplist->map); 60512891Swpaul free(yp_maplist); 60612891Swpaul yp_maplist = next; 60712891Swpaul } 60812891Swpaul return; 60912891Swpaul} 61012891Swpaul 61112891Swpaulstatic struct ypmaplist *yp_maplist_create(domain) 61212891Swpaul const char *domain; 61312891Swpaul{ 61412891Swpaul char yp_mapdir[MAXPATHLEN + 2]; 61512891Swpaul char yp_mapname[MAXPATHLEN + 2]; 61612891Swpaul struct ypmaplist *cur = NULL; 61712891Swpaul struct ypmaplist *yp_maplist = NULL; 61812891Swpaul DIR *dird; 61912891Swpaul struct dirent *dirp; 62012891Swpaul struct stat statbuf; 62112891Swpaul 62212891Swpaul snprintf(yp_mapdir, sizeof(yp_mapdir), "%s/%s", yp_dir, domain); 62312891Swpaul 62412891Swpaul if ((dird = opendir(yp_mapdir)) == NULL) { 62512891Swpaul yp_error("opendir(%s) failed: %s", strerror(errno)); 62612891Swpaul return(NULL); 62712891Swpaul } 62812891Swpaul 62912891Swpaul while ((dirp = readdir(dird)) != NULL) { 63012891Swpaul if (strcmp(dirp->d_name, ".") && strcmp(dirp->d_name, "..")) { 63112891Swpaul snprintf(yp_mapname, sizeof(yp_mapname), "%s/%s",yp_mapdir,dirp->d_name); 63212891Swpaul if (stat(yp_mapname, &statbuf) < 0 || !S_ISREG(statbuf.st_mode)) 63312891Swpaul continue; 63412891Swpaul if ((cur = (struct ypmaplist *)malloc(sizeof(struct ypmaplist))) < 0) { 63512891Swpaul yp_error("malloc() failed: %s", strerror(errno)); 63612891Swpaul closedir(dird); 63712891Swpaul yp_maplist_free(yp_maplist); 63812891Swpaul return(NULL); 63912891Swpaul } 64012891Swpaul if ((cur->map = (char *)strdup(dirp->d_name)) == NULL) { 64112891Swpaul yp_error("strdup() failed: %s", strerror(errno)); 64212891Swpaul closedir(dird); 64312891Swpaul yp_maplist_free(yp_maplist); 64412891Swpaul return(NULL); 64512891Swpaul } 64612891Swpaul cur->next = yp_maplist; 64712891Swpaul yp_maplist = cur; 64812891Swpaul if (debug) 64912891Swpaul yp_error("map: %s", yp_maplist->map); 65012891Swpaul } 65112891Swpaul 65212891Swpaul } 65312891Swpaul closedir(dird); 65412891Swpaul return(yp_maplist); 65512891Swpaul} 65612891Swpaul 65712891Swpaulypresp_maplist * 65812891Swpaulypproc_maplist_2_svc(domainname *argp, struct svc_req *rqstp) 65912891Swpaul{ 66012891Swpaul static ypresp_maplist result; 66112891Swpaul 66212891Swpaul if (yp_access(NULL, (struct svc_req *)rqstp)) { 66312891Swpaul result.stat = YP_YPERR; 66412891Swpaul return(&result); 66512891Swpaul } 66612891Swpaul 66712891Swpaul if (argp == NULL) { 66812891Swpaul result.stat = YP_BADARGS; 66912891Swpaul return (&result); 67012891Swpaul } 67112891Swpaul 67212891Swpaul if (yp_validdomain(*argp)) { 67312891Swpaul result.stat = YP_NODOM; 67412891Swpaul return (&result); 67512891Swpaul } 67612891Swpaul 67712891Swpaul /* 67812891Swpaul * We have to construct a linked list for the ypproc_maplist 67912891Swpaul * procedure using dynamically allocated memory. Since the XDR 68012891Swpaul * layer won't free this list for us, we have to deal with it 68112891Swpaul * ourselves. We call yp_maplist_free() first to free any 68212891Swpaul * previously allocated data we may have accumulated to insure 68312891Swpaul * that we have only one linked list in memory at any given 68412891Swpaul * time. 68512891Swpaul */ 68612891Swpaul 68712891Swpaul yp_maplist_free(result.maps); 68812891Swpaul 68912891Swpaul if ((result.maps = yp_maplist_create(*argp)) == NULL) { 69012891Swpaul yp_error("yp_maplist_create failed"); 69112891Swpaul result.stat = YP_YPERR; 69212891Swpaul return(&result); 69312891Swpaul } else 69412891Swpaul result.stat = YP_TRUE; 69512891Swpaul 69612891Swpaul return (&result); 69712891Swpaul} 698