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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ypldap/yp.c	Lines:	0	292	0.0 %
Date:	2017-11-13	Branches:	0	165	0.0 %


/*	$OpenBSD: yp.c,v 1.18 2016/11/29 17:15:27 mestre Exp $ */
/*
 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <sys/tree.h>

#include <netinet/in.h>
#include <arpa/inet.h>

#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <unistd.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>

#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_rmt.h>
#include <rpcsvc/yp.h>
#include <rpcsvc/ypclnt.h>

#include "ypldap.h"

void	yp_dispatch(struct svc_req *, SVCXPRT *);
void	yp_disable_events(void);
void	yp_fd_event(int, short, void *);
int	yp_check(struct svc_req *);
int	yp_valid_domain(char *, struct ypresp_val *);
void	yp_make_val(struct ypresp_val *, char *, int);
void	yp_make_keyval(struct ypresp_key_val *, char *, char *);

static struct env	*env;

struct yp_event {
	TAILQ_ENTRY(yp_event)	 ye_entry;
	struct event		 ye_event;
};

struct yp_data {
	SVCXPRT			*yp_trans_udp;
	SVCXPRT			*yp_trans_tcp;
	TAILQ_HEAD(, yp_event)	 yd_events;
};

void
yp_disable_events(void)
{
	struct yp_event	*ye;

	while ((ye = TAILQ_FIRST(&env->sc_yp->yd_events)) != NULL) {
		TAILQ_REMOVE(&env->sc_yp->yd_events, ye, ye_entry);
		event_del(&ye->ye_event);
		free(ye);
	}
}

void
yp_enable_events(void)
{
	int		 i;
	extern fd_set	*__svc_fdset;
	extern int	 __svc_fdsetsize;
	struct yp_event	*ye;

	for (i = 0; i < __svc_fdsetsize; i++) {
		if (FD_ISSET(i, __svc_fdset)) {
			if ((ye = calloc(1, sizeof(*ye))) == NULL)
				fatal(NULL);
			event_set(&ye->ye_event, i, EV_READ, yp_fd_event, NULL);
			event_add(&ye->ye_event, NULL);
			TAILQ_INSERT_TAIL(&env->sc_yp->yd_events, ye, ye_entry);
		}
	}
}

void
yp_fd_event(int fd, short event, void *p)
{
	svc_getreq_common(fd);
	yp_disable_events();
	yp_enable_events();
}

void
yp_init(struct env *x_env)
{
	struct yp_data	*yp;

	if ((yp = calloc(1, sizeof(*yp))) == NULL)
		fatal(NULL);
	TAILQ_INIT(&yp->yd_events);

	env = x_env;
	env->sc_yp = yp;

	(void)pmap_unset(YPPROG, YPVERS);

	if ((yp->yp_trans_udp = svcudp_create(RPC_ANYSOCK)) == NULL)
		fatal("cannot create udp service");
	if ((yp->yp_trans_tcp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL)
		fatal("cannot create tcp service");

	if (!svc_register(yp->yp_trans_udp, YPPROG, YPVERS,
	    yp_dispatch, IPPROTO_UDP)) {
		fatal("unable to register (YPPROG, YPVERS, udp)");
	}
	if (!svc_register(yp->yp_trans_tcp, YPPROG, YPVERS,
	    yp_dispatch, IPPROTO_TCP)) {
		fatal("unable to register (YPPROG, YPVERS, tcp)");
	}
}

/*
 * lots of inspiration from ypserv by Mats O Jansson
 */
void
yp_dispatch(struct svc_req *req, SVCXPRT *trans)
{
	xdrproc_t		 xdr_argument;
	xdrproc_t		 xdr_result;
	char			*result;
	char			*(*cb)(char *, struct svc_req *);
        union {
		domainname	 ypproc_domain_2_arg;
		domainname	 ypproc_domain_nonack_2_arg;
		ypreq_key	 ypproc_match_2_arg;
		ypreq_nokey	 ypproc_first_2_arg;
		ypreq_key	 ypproc_next_2_arg;
		ypreq_xfr	 ypproc_xfr_2_arg;
		ypreq_nokey	 ypproc_all_2_arg;
		ypreq_nokey	 ypproc_master_2_arg;
		ypreq_nokey	 ypproc_order_2_arg;
		domainname	 ypproc_maplist_2_arg;
	} argument;

	xdr_argument = (xdrproc_t) xdr_void;
	xdr_result = (xdrproc_t) xdr_void;
	cb = NULL;
	switch (req->rq_proc) {
	case YPPROC_NULL:
		xdr_argument = (xdrproc_t) xdr_void;
		xdr_result = (xdrproc_t) xdr_void;
		if (yp_check(req) == -1)
			return;
		result = NULL;
		if (!svc_sendreply(trans, (xdrproc_t) xdr_void,
		    (void *)&result))
			svcerr_systemerr(trans);
		return;
	case YPPROC_DOMAIN:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_bool;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_domain_2_svc;
		break;
	case YPPROC_DOMAIN_NONACK:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_bool;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_domain_nonack_2_svc;
		break;
	case YPPROC_MATCH:
		xdr_argument = (xdrproc_t) xdr_ypreq_key;
		xdr_result = (xdrproc_t) xdr_ypresp_val;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_match_2_svc;
		break;
	case YPPROC_FIRST:
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_key_val;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_first_2_svc;
		break;
	case YPPROC_NEXT:
		xdr_argument = (xdrproc_t) xdr_ypreq_key;
		xdr_result = (xdrproc_t) xdr_ypresp_key_val;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_next_2_svc;
		break;
	case YPPROC_XFR:
		if (yp_check(req) == -1)
			return;
		svcerr_noproc(trans);
		return;
	case YPPROC_CLEAR:
		log_debug("ypproc_clear");
		if (yp_check(req) == -1)
			return;
		svcerr_noproc(trans);
		return;
	case YPPROC_ALL:
		log_debug("ypproc_all");
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_all;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_all_2_svc;
		break;
	case YPPROC_MASTER:
		xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
		xdr_result = (xdrproc_t) xdr_ypresp_master;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_master_2_svc;
		break;
	case YPPROC_ORDER:
		log_debug("ypproc_order");
		if (yp_check(req) == -1)
			return;
		svcerr_noproc(trans);
		return;
	case YPPROC_MAPLIST:
		xdr_argument = (xdrproc_t) xdr_domainname;
		xdr_result = (xdrproc_t) xdr_ypresp_maplist;
		if (yp_check(req) == -1)
			return;
		cb = (void *)ypproc_maplist_2_svc;
		break;
	default:
		svcerr_noproc(trans);
		return;
	}
	(void)memset(&argument, 0, sizeof(argument));

	if (!svc_getargs(trans, xdr_argument, (caddr_t)&argument)) {
		svcerr_decode(trans);
		return;
	}
	result = (*cb)((char *)&argument, req);
	if (result != NULL && !svc_sendreply(trans, xdr_result, result))
		svcerr_systemerr(trans);
	if (!svc_freeargs(trans, xdr_argument, (caddr_t)&argument)) {
		/*
		 * ypserv does it too.
		 */
		fatal("unable to free arguments");
	}
}

int
yp_check(struct svc_req *req)
{
	struct sockaddr_in	*caller;

	caller = svc_getcaller(req->rq_xprt);
	/*
	 * We might want to know who we allow here.
	 */
	return (0);
}

int
yp_valid_domain(char *domain, struct ypresp_val *res)
{
	if (domain == NULL) {
		log_debug("NULL domain !");
		return (-1);
	}
	if (strcmp(domain, env->sc_domainname) != 0) {
		res->stat = YP_NODOM;
		return (-1);
	}
	return (0);
}

bool_t *
ypproc_domain_2_svc(domainname *arg, struct svc_req *req)
{
	static bool_t	res;

	res = (bool_t)1;
	if (strcmp(*arg, env->sc_domainname) != 0)
		res = (bool_t)0;
	return (&res);
}

bool_t *
ypproc_domain_nonack_2_svc(domainname *arg, struct svc_req *req)
{
	static bool_t	res;

	if (strcmp(*arg, env->sc_domainname) != 0)
		return NULL;
	res = (bool_t)1;
	return (&res);
}

ypresp_val *
ypproc_match_2_svc(ypreq_key *arg, struct svc_req *req)
{
	struct userent		 ukey;
	struct userent		*ue;
	struct groupent		 gkey;
	struct groupent		*ge;
	static struct ypresp_val res;
	const char		*estr;
	char			*bp, *cp;
	char			 key[YPMAXRECORD+1];

	log_debug("matching '%.*s' in map %s", arg->key.keydat_len,
	   arg->key.keydat_val, arg->map);

	if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
		return (&res);

	if (env->sc_user_names == NULL) {
		/*
		 * tree not ready.
		 */
		return (NULL);
	}

	if (arg->key.keydat_len > YPMAXRECORD) {
		log_debug("argument too long");
		return (NULL);
	}
	memset(key, 0, sizeof(key));
	(void)strncpy(key, arg->key.keydat_val, arg->key.keydat_len);

	if (strcmp(arg->map, "passwd.byname") == 0 ||
	    strcmp(arg->map, "master.passwd.byname") == 0) {
		ukey.ue_line = key;
		if ((ue = RB_FIND(user_name_tree, env->sc_user_names,
		    &ukey)) == NULL) {
			res.stat = YP_NOKEY;
			return (&res);
		}

		yp_make_val(&res, ue->ue_line, 1);
		return (&res);
	} else if (strcmp(arg->map, "passwd.byuid") == 0 ||
		   strcmp(arg->map, "master.passwd.byuid") == 0) {
		ukey.ue_uid = strtonum(key, 0, UID_MAX, &estr);
		if (estr) {
			res.stat = YP_BADARGS;
			return (&res);
		}

		if ((ue = RB_FIND(user_uid_tree, &env->sc_user_uids,
		    &ukey)) == NULL) {
			res.stat = YP_NOKEY;
			return (&res);
		}

		yp_make_val(&res, ue->ue_line, 1);
		return (&res);
	} else if (strcmp(arg->map, "group.bygid") == 0) {
		gkey.ge_gid = strtonum(key, 0, GID_MAX, &estr);
		if (estr) {
			res.stat = YP_BADARGS;
			return (&res);
		}
		if ((ge = RB_FIND(group_gid_tree, &env->sc_group_gids,
		    &gkey)) == NULL) {
			res.stat = YP_NOKEY;
			return (&res);
		}

		yp_make_val(&res, ge->ge_line, 1);
		return (&res);
	} else if (strcmp(arg->map, "group.byname") == 0) {
		gkey.ge_line = key;
		if ((ge = RB_FIND(group_name_tree, env->sc_group_names,
		    &gkey)) == NULL) {
			res.stat = YP_NOKEY;
			return (&res);
		}

		yp_make_val(&res, ge->ge_line, 1);
		return (&res);
	} else if (strcmp(arg->map, "netid.byname") == 0) {
		bp = cp = key;

		if (strncmp(bp, "unix.", strlen("unix.")) != 0) {
			res.stat = YP_BADARGS;
			return (&res);
		}

		bp += strlen("unix.");

		if (*bp == '\0') {
			res.stat = YP_BADARGS;
			return (&res);
		}

		if (!(cp = strsep(&bp, "@"))) {
			res.stat = YP_BADARGS;
			return (&res);
		}

		if (strcmp(bp, arg->domain) != 0) {
			res.stat = YP_BADARGS;
			return (&res);
		}

		ukey.ue_uid = strtonum(cp, 0, UID_MAX, &estr);
		if (estr) {
			res.stat = YP_BADARGS;
			return (&res);
		}

		if ((ue = RB_FIND(user_uid_tree, &env->sc_user_uids,
		    &ukey)) == NULL) {
			res.stat = YP_NOKEY;
			return (&res);
		}

		yp_make_val(&res, ue->ue_netid_line, 0);
		return (&res);

	} else {
		log_debug("unknown map %s", arg->map);
		res.stat = YP_NOMAP;
		return (&res);
	}
}

ypresp_key_val *
ypproc_first_2_svc(ypreq_nokey *arg, struct svc_req *req)
{
	static struct ypresp_key_val	res;

	if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
		return (&res);

	if (strcmp(arg->map, "passwd.byname") == 0 ||
	    strcmp(arg->map, "master.passwd.byname") == 0) {
		if (env->sc_user_lines == NULL)
			return (NULL);

		yp_make_keyval(&res, env->sc_user_lines, env->sc_user_lines);
	} else if (strcmp(arg->map, "group.byname") == 0) {
		if (env->sc_group_lines == NULL)
			return (NULL);

		yp_make_keyval(&res, env->sc_group_lines, env->sc_group_lines);
	} else {
		log_debug("unknown map %s", arg->map);
		res.stat = YP_NOMAP;
	}

	return (&res);
}

ypresp_key_val *
ypproc_next_2_svc(ypreq_key *arg, struct svc_req *req)
{
	struct userent			 ukey;
	struct userent			*ue;
	struct groupent			 gkey;
	struct groupent			*ge;
	char				*line;
	static struct ypresp_key_val	 res;
	char				 key[YPMAXRECORD+1];

	if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
		return (&res);

	if (strcmp(arg->map, "passwd.byname") == 0 ||
	    strcmp(arg->map, "master.passwd.byname") == 0) {
		memset(key, 0, sizeof(key));
		(void)strncpy(key, arg->key.keydat_val,
		    arg->key.keydat_len);
		ukey.ue_line = key;
		if ((ue = RB_FIND(user_name_tree, env->sc_user_names,
		    &ukey)) == NULL) {
			/*
			 * canacar's trick:
			 * the user might have been deleted in between calls
			 * to next since the tree may be modified by a reload.
			 * next should still return the next user in
			 * lexicographical order, hence insert the search key
			 * and look up the next field, then remove it again.
			 */
			RB_INSERT(user_name_tree, env->sc_user_names, &ukey);
			if ((ue = RB_NEXT(user_name_tree, &env->sc_user_names,
			    &ukey)) == NULL) {
				RB_REMOVE(user_name_tree, env->sc_user_names,
				    &ukey);
				res.stat = YP_NOKEY;
				return (&res);
			}
			RB_REMOVE(user_name_tree, env->sc_user_names, &ukey);
		}
		line = ue->ue_line + (strlen(ue->ue_line) + 1);
		line = line + (strlen(line) + 1);
		yp_make_keyval(&res, line, line);
		return (&res);


	} else if (strcmp(arg->map, "group.byname") == 0) {
		memset(key, 0, sizeof(key));
		(void)strncpy(key, arg->key.keydat_val,
		    arg->key.keydat_len);

		gkey.ge_line = key;
		if ((ge = RB_FIND(group_name_tree, env->sc_group_names,
		    &gkey)) == NULL) {
			/*
			 * canacar's trick reloaded.
			 */
			RB_INSERT(group_name_tree, env->sc_group_names, &gkey);
			if ((ge = RB_NEXT(group_name_tree, &env->sc_group_names,
			    &gkey)) == NULL) {
				RB_REMOVE(group_name_tree, env->sc_group_names,
				    &gkey);
				res.stat = YP_NOKEY;
				return (&res);
			}
			RB_REMOVE(group_name_tree, env->sc_group_names, &gkey);
		}

		line = ge->ge_line + (strlen(ge->ge_line) + 1);
		line = line + (strlen(line) + 1);
		yp_make_keyval(&res, line, line);
		return (&res);
	} else {
		log_debug("unknown map %s", arg->map);
		res.stat = YP_NOMAP;
		return (&res);
	}
}

ypresp_all *
ypproc_all_2_svc(ypreq_nokey *arg, struct svc_req *req)
{
	static struct ypresp_all	res;

	if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
		return (&res);

	svcerr_auth(req->rq_xprt, AUTH_FAILED);
	return (NULL);
}

ypresp_master *
ypproc_master_2_svc(ypreq_nokey *arg, struct svc_req *req)
{
	static struct ypresp_master	 res;
	static char master[YPMAXPEER + 1];

	memset(&res, 0, sizeof(res));
	if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
		return (&res);
	if (gethostname(master, sizeof(master)) == 0) {
		res.peer = (peername)master;
		res.stat = YP_TRUE;
	} else
		res.stat = YP_NOKEY;
	return (&res);
}

ypresp_maplist *
ypproc_maplist_2_svc(domainname *arg, struct svc_req *req)
{
	size_t			 i;
	static struct {
		char		*name;
		int		 cond;
	}			 mapnames[] = {
		{ "passwd.byname",		YPMAP_PASSWD_BYNAME },
		{ "passwd.byuid",		YPMAP_PASSWD_BYUID },
		{ "master.passwd.byname",	YPMAP_MASTER_PASSWD_BYNAME },
		{ "master.passwd.byuid",	YPMAP_MASTER_PASSWD_BYUID },
		{ "group.byname",		YPMAP_GROUP_BYNAME },
		{ "group.bygid",		YPMAP_GROUP_BYGID },
		{ "netid.byname",		YPMAP_NETID_BYNAME },
	};
	static ypresp_maplist	 res;
	static struct ypmaplist	 maps[sizeof(mapnames) / sizeof(mapnames[0])];

	if (yp_valid_domain(*arg, (struct ypresp_val *)&res) == -1)
		return (&res);

	res.stat = YP_TRUE;
	res.maps = NULL;
	for (i = 0; i < sizeof(mapnames) / sizeof(mapnames[0]); i++) {
		if (!(env->sc_flags & mapnames[i].cond))
			continue;
		maps[i].map = mapnames[i].name;
		maps[i].next = res.maps;
		res.maps = &maps[i];
	}

	return (&res);
}

void
yp_make_val(struct ypresp_val *res, char *line, int replacecolon)
{
	static char		 buf[LINE_WIDTH];

	memset(buf, 0, sizeof(buf));

	if (replacecolon)
		line[strlen(line)] = ':';
	(void)strlcpy(buf, line, sizeof(buf));
	if (replacecolon)
		line[strcspn(line, ":")] = '\0';
	log_debug("sending out %s", buf);

	res->stat = YP_TRUE;
	res->val.valdat_len = strlen(buf);
	res->val.valdat_val = buf;
}

void
yp_make_keyval(struct ypresp_key_val *res, char *key, char *line)
{
	static char	keybuf[YPMAXRECORD+1];
	static char	buf[LINE_WIDTH];

	memset(keybuf, 0, sizeof(keybuf));
	memset(buf, 0, sizeof(buf));

	(void)strlcpy(keybuf, key, sizeof(keybuf));
	res->key.keydat_len = strlen(keybuf);
	res->key.keydat_val = keybuf;

	if (*line == '\0') {
		res->stat = YP_NOMORE;
		return;
	}
	res->stat = YP_TRUE;
	line[strlen(line)] = ':';
	(void)strlcpy(buf, line, sizeof(buf));
	line[strcspn(line, ":")] = '\0';
	log_debug("sending out %s => %s", keybuf, buf);

	res->val.valdat_len = strlen(buf);
	res->val.valdat_val = buf;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: yp.c,v 1.18 2016/11/29 17:15:27 mestre Exp $ */
2			/*
3			* Copyright (c) 2008 Pierre-Yves Ritschard <pyr@openbsd.org>
4			*
5			* Permission to use, copy, modify, and distribute this software for any
6			* purpose with or without fee is hereby granted, provided that the above
7			* copyright notice and this permission notice appear in all copies.
8			*
9			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16			*/
17
18			#include <sys/types.h>
19			#include <sys/queue.h>
20			#include <sys/socket.h>
21			#include <sys/select.h>
22			#include <sys/tree.h>
23
24			#include <netinet/in.h>
25			#include <arpa/inet.h>
26
27			#include <errno.h>
28			#include <event.h>
29			#include <fcntl.h>
30			#include <unistd.h>
31			#include <pwd.h>
32			#include <stdio.h>
33			#include <stdlib.h>
34			#include <string.h>
35			#include <limits.h>
36
37			#include <rpc/rpc.h>
38			#include <rpc/xdr.h>
39			#include <rpc/pmap_clnt.h>
40			#include <rpc/pmap_prot.h>
41			#include <rpc/pmap_rmt.h>
42			#include <rpcsvc/yp.h>
43			#include <rpcsvc/ypclnt.h>
44
45			#include "ypldap.h"
46
47			void yp_dispatch(struct svc_req , SVCXPRT );
48			void yp_disable_events(void);
49			void yp_fd_event(int, short, void *);
50			int yp_check(struct svc_req *);
51			int yp_valid_domain(char , struct ypresp_val );
52			void yp_make_val(struct ypresp_val , char , int);
53			void yp_make_keyval(struct ypresp_key_val , char , char *);
54
55			static struct env *env;
56
57			struct yp_event {
58			TAILQ_ENTRY(yp_event) ye_entry;
59			struct event ye_event;
60			};
61
62			struct yp_data {
63			SVCXPRT *yp_trans_udp;
64			SVCXPRT *yp_trans_tcp;
65			TAILQ_HEAD(, yp_event) yd_events;
66			};
67
68			void
69			yp_disable_events(void)
70			{
71			struct yp_event *ye;
72
73			while ((ye = TAILQ_FIRST(&env->sc_yp->yd_events)) != NULL) {
74			TAILQ_REMOVE(&env->sc_yp->yd_events, ye, ye_entry);
75			event_del(&ye->ye_event);
76			free(ye);
77			}
78			}
79
80			void
81			yp_enable_events(void)
82			{
83			int i;
84			extern fd_set *__svc_fdset;
85			extern int __svc_fdsetsize;
86			struct yp_event *ye;
87
88			for (i = 0; i < __svc_fdsetsize; i++) {
89			if (FD_ISSET(i, __svc_fdset)) {
90			if ((ye = calloc(1, sizeof(*ye))) == NULL)
91			fatal(NULL);
92			event_set(&ye->ye_event, i, EV_READ, yp_fd_event, NULL);
93			event_add(&ye->ye_event, NULL);
94			TAILQ_INSERT_TAIL(&env->sc_yp->yd_events, ye, ye_entry);
95			}
96			}
97			}
98
99			void
100			yp_fd_event(int fd, short event, void *p)
101			{
102			svc_getreq_common(fd);
103			yp_disable_events();
104			yp_enable_events();
105			}
106
107			void
108			yp_init(struct env *x_env)
109			{
110			struct yp_data *yp;
111
112			if ((yp = calloc(1, sizeof(*yp))) == NULL)
113			fatal(NULL);
114			TAILQ_INIT(&yp->yd_events);
115
116			env = x_env;
117			env->sc_yp = yp;
118
119			(void)pmap_unset(YPPROG, YPVERS);
120
121			if ((yp->yp_trans_udp = svcudp_create(RPC_ANYSOCK)) == NULL)
122			fatal("cannot create udp service");
123			if ((yp->yp_trans_tcp = svctcp_create(RPC_ANYSOCK, 0, 0)) == NULL)
124			fatal("cannot create tcp service");
125
126			if (!svc_register(yp->yp_trans_udp, YPPROG, YPVERS,
127			yp_dispatch, IPPROTO_UDP)) {
128			fatal("unable to register (YPPROG, YPVERS, udp)");
129			}
130			if (!svc_register(yp->yp_trans_tcp, YPPROG, YPVERS,
131			yp_dispatch, IPPROTO_TCP)) {
132			fatal("unable to register (YPPROG, YPVERS, tcp)");
133			}
134			}
135
136			/*
137			* lots of inspiration from ypserv by Mats O Jansson
138			*/
139			void
140			yp_dispatch(struct svc_req req, SVCXPRT trans)
141			{
142			xdrproc_t xdr_argument;
143			xdrproc_t xdr_result;
144			char *result;
145			char (cb)(char , struct svc_req );
146			union {
147			domainname ypproc_domain_2_arg;
148			domainname ypproc_domain_nonack_2_arg;
149			ypreq_key ypproc_match_2_arg;
150			ypreq_nokey ypproc_first_2_arg;
151			ypreq_key ypproc_next_2_arg;
152			ypreq_xfr ypproc_xfr_2_arg;
153			ypreq_nokey ypproc_all_2_arg;
154			ypreq_nokey ypproc_master_2_arg;
155			ypreq_nokey ypproc_order_2_arg;
156			domainname ypproc_maplist_2_arg;
157			} argument;
158
159			xdr_argument = (xdrproc_t) xdr_void;
160			xdr_result = (xdrproc_t) xdr_void;
161			cb = NULL;
162			switch (req->rq_proc) {
163			case YPPROC_NULL:
164			xdr_argument = (xdrproc_t) xdr_void;
165			xdr_result = (xdrproc_t) xdr_void;
166			if (yp_check(req) == -1)
167			return;
168			result = NULL;
169			if (!svc_sendreply(trans, (xdrproc_t) xdr_void,
170			(void *)&result))
171			svcerr_systemerr(trans);
172			return;
173			case YPPROC_DOMAIN:
174			xdr_argument = (xdrproc_t) xdr_domainname;
175			xdr_result = (xdrproc_t) xdr_bool;
176			if (yp_check(req) == -1)
177			return;
178			cb = (void *)ypproc_domain_2_svc;
179			break;
180			case YPPROC_DOMAIN_NONACK:
181			xdr_argument = (xdrproc_t) xdr_domainname;
182			xdr_result = (xdrproc_t) xdr_bool;
183			if (yp_check(req) == -1)
184			return;
185			cb = (void *)ypproc_domain_nonack_2_svc;
186			break;
187			case YPPROC_MATCH:
188			xdr_argument = (xdrproc_t) xdr_ypreq_key;
189			xdr_result = (xdrproc_t) xdr_ypresp_val;
190			if (yp_check(req) == -1)
191			return;
192			cb = (void *)ypproc_match_2_svc;
193			break;
194			case YPPROC_FIRST:
195			xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
196			xdr_result = (xdrproc_t) xdr_ypresp_key_val;
197			if (yp_check(req) == -1)
198			return;
199			cb = (void *)ypproc_first_2_svc;
200			break;
201			case YPPROC_NEXT:
202			xdr_argument = (xdrproc_t) xdr_ypreq_key;
203			xdr_result = (xdrproc_t) xdr_ypresp_key_val;
204			if (yp_check(req) == -1)
205			return;
206			cb = (void *)ypproc_next_2_svc;
207			break;
208			case YPPROC_XFR:
209			if (yp_check(req) == -1)
210			return;
211			svcerr_noproc(trans);
212			return;
213			case YPPROC_CLEAR:
214			log_debug("ypproc_clear");
215			if (yp_check(req) == -1)
216			return;
217			svcerr_noproc(trans);
218			return;
219			case YPPROC_ALL:
220			log_debug("ypproc_all");
221			xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
222			xdr_result = (xdrproc_t) xdr_ypresp_all;
223			if (yp_check(req) == -1)
224			return;
225			cb = (void *)ypproc_all_2_svc;
226			break;
227			case YPPROC_MASTER:
228			xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
229			xdr_result = (xdrproc_t) xdr_ypresp_master;
230			if (yp_check(req) == -1)
231			return;
232			cb = (void *)ypproc_master_2_svc;
233			break;
234			case YPPROC_ORDER:
235			log_debug("ypproc_order");
236			if (yp_check(req) == -1)
237			return;
238			svcerr_noproc(trans);
239			return;
240			case YPPROC_MAPLIST:
241			xdr_argument = (xdrproc_t) xdr_domainname;
242			xdr_result = (xdrproc_t) xdr_ypresp_maplist;
243			if (yp_check(req) == -1)
244			return;
245			cb = (void *)ypproc_maplist_2_svc;
246			break;
247			default:
248			svcerr_noproc(trans);
249			return;
250			}
251			(void)memset(&argument, 0, sizeof(argument));
252
253			if (!svc_getargs(trans, xdr_argument, (caddr_t)&argument)) {
254			svcerr_decode(trans);
255			return;
256			}
257			result = (cb)((char )&argument, req);
258			if (result != NULL && !svc_sendreply(trans, xdr_result, result))
259			svcerr_systemerr(trans);
260			if (!svc_freeargs(trans, xdr_argument, (caddr_t)&argument)) {
261			/*
262			* ypserv does it too.
263			*/
264			fatal("unable to free arguments");
265			}
266			}
267
268			int
269			yp_check(struct svc_req *req)
270			{
271			struct sockaddr_in *caller;
272
273			caller = svc_getcaller(req->rq_xprt);
274			/*
275			* We might want to know who we allow here.
276			*/
277			return (0);
278			}
279
280			int
281			yp_valid_domain(char domain, struct ypresp_val res)
282			{
283			if (domain == NULL) {
284			log_debug("NULL domain !");
285			return (-1);
286			}
287			if (strcmp(domain, env->sc_domainname) != 0) {
288			res->stat = YP_NODOM;
289			return (-1);
290			}
291			return (0);
292			}
293
294			bool_t *
295			ypproc_domain_2_svc(domainname arg, struct svc_req req)
296			{
297			static bool_t res;
298
299			res = (bool_t)1;
300			if (strcmp(*arg, env->sc_domainname) != 0)
301			res = (bool_t)0;
302			return (&res);
303			}
304
305			bool_t *
306			ypproc_domain_nonack_2_svc(domainname arg, struct svc_req req)
307			{
308			static bool_t res;
309
310			if (strcmp(*arg, env->sc_domainname) != 0)
311			return NULL;
312			res = (bool_t)1;
313			return (&res);
314			}
315
316			ypresp_val *
317			ypproc_match_2_svc(ypreq_key arg, struct svc_req req)
318			{
319			struct userent ukey;
320			struct userent *ue;
321			struct groupent gkey;
322			struct groupent *ge;
323			static struct ypresp_val res;
324			const char *estr;
325			char bp, cp;
326			char key[YPMAXRECORD+1];
327
328			log_debug("matching '%.*s' in map %s", arg->key.keydat_len,
329			arg->key.keydat_val, arg->map);
330
331			if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
332			return (&res);
333
334			if (env->sc_user_names == NULL) {
335			/*
336			* tree not ready.
337			*/
338			return (NULL);
339			}
340
341			if (arg->key.keydat_len > YPMAXRECORD) {
342			log_debug("argument too long");
343			return (NULL);
344			}
345			memset(key, 0, sizeof(key));
346			(void)strncpy(key, arg->key.keydat_val, arg->key.keydat_len);
347
348			if (strcmp(arg->map, "passwd.byname") == 0 \|\|
349			strcmp(arg->map, "master.passwd.byname") == 0) {
350			ukey.ue_line = key;
351			if ((ue = RB_FIND(user_name_tree, env->sc_user_names,
352			&ukey)) == NULL) {
353			res.stat = YP_NOKEY;
354			return (&res);
355			}
356
357			yp_make_val(&res, ue->ue_line, 1);
358			return (&res);
359			} else if (strcmp(arg->map, "passwd.byuid") == 0 \|\|
360			strcmp(arg->map, "master.passwd.byuid") == 0) {
361			ukey.ue_uid = strtonum(key, 0, UID_MAX, &estr);
362			if (estr) {
363			res.stat = YP_BADARGS;
364			return (&res);
365			}
366
367			if ((ue = RB_FIND(user_uid_tree, &env->sc_user_uids,
368			&ukey)) == NULL) {
369			res.stat = YP_NOKEY;
370			return (&res);
371			}
372
373			yp_make_val(&res, ue->ue_line, 1);
374			return (&res);
375			} else if (strcmp(arg->map, "group.bygid") == 0) {
376			gkey.ge_gid = strtonum(key, 0, GID_MAX, &estr);
377			if (estr) {
378			res.stat = YP_BADARGS;
379			return (&res);
380			}
381			if ((ge = RB_FIND(group_gid_tree, &env->sc_group_gids,
382			&gkey)) == NULL) {
383			res.stat = YP_NOKEY;
384			return (&res);
385			}
386
387			yp_make_val(&res, ge->ge_line, 1);
388			return (&res);
389			} else if (strcmp(arg->map, "group.byname") == 0) {
390			gkey.ge_line = key;
391			if ((ge = RB_FIND(group_name_tree, env->sc_group_names,
392			&gkey)) == NULL) {
393			res.stat = YP_NOKEY;
394			return (&res);
395			}
396
397			yp_make_val(&res, ge->ge_line, 1);
398			return (&res);
399			} else if (strcmp(arg->map, "netid.byname") == 0) {
400			bp = cp = key;
401
402			if (strncmp(bp, "unix.", strlen("unix.")) != 0) {
403			res.stat = YP_BADARGS;
404			return (&res);
405			}
406
407			bp += strlen("unix.");
408
409			if (*bp == '\0') {
410			res.stat = YP_BADARGS;
411			return (&res);
412			}
413
414			if (!(cp = strsep(&bp, "@"))) {
415			res.stat = YP_BADARGS;
416			return (&res);
417			}
418
419			if (strcmp(bp, arg->domain) != 0) {
420			res.stat = YP_BADARGS;
421			return (&res);
422			}
423
424			ukey.ue_uid = strtonum(cp, 0, UID_MAX, &estr);
425			if (estr) {
426			res.stat = YP_BADARGS;
427			return (&res);
428			}
429
430			if ((ue = RB_FIND(user_uid_tree, &env->sc_user_uids,
431			&ukey)) == NULL) {
432			res.stat = YP_NOKEY;
433			return (&res);
434			}
435
436			yp_make_val(&res, ue->ue_netid_line, 0);
437			return (&res);
438
439			} else {
440			log_debug("unknown map %s", arg->map);
441			res.stat = YP_NOMAP;
442			return (&res);
443			}
444			}
445
446			ypresp_key_val *
447			ypproc_first_2_svc(ypreq_nokey arg, struct svc_req req)
448			{
449			static struct ypresp_key_val res;
450
451			if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
452			return (&res);
453
454			if (strcmp(arg->map, "passwd.byname") == 0 \|\|
455			strcmp(arg->map, "master.passwd.byname") == 0) {
456			if (env->sc_user_lines == NULL)
457			return (NULL);
458
459			yp_make_keyval(&res, env->sc_user_lines, env->sc_user_lines);
460			} else if (strcmp(arg->map, "group.byname") == 0) {
461			if (env->sc_group_lines == NULL)
462			return (NULL);
463
464			yp_make_keyval(&res, env->sc_group_lines, env->sc_group_lines);
465			} else {
466			log_debug("unknown map %s", arg->map);
467			res.stat = YP_NOMAP;
468			}
469
470			return (&res);
471			}
472
473			ypresp_key_val *
474			ypproc_next_2_svc(ypreq_key arg, struct svc_req req)
475			{
476			struct userent ukey;
477			struct userent *ue;
478			struct groupent gkey;
479			struct groupent *ge;
480			char *line;
481			static struct ypresp_key_val res;
482			char key[YPMAXRECORD+1];
483
484			if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
485			return (&res);
486
487			if (strcmp(arg->map, "passwd.byname") == 0 \|\|
488			strcmp(arg->map, "master.passwd.byname") == 0) {
489			memset(key, 0, sizeof(key));
490			(void)strncpy(key, arg->key.keydat_val,
491			arg->key.keydat_len);
492			ukey.ue_line = key;
493			if ((ue = RB_FIND(user_name_tree, env->sc_user_names,
494			&ukey)) == NULL) {
495			/*
496			* canacar's trick:
497			* the user might have been deleted in between calls
498			* to next since the tree may be modified by a reload.
499			* next should still return the next user in
500			* lexicographical order, hence insert the search key
501			* and look up the next field, then remove it again.
502			*/
503			RB_INSERT(user_name_tree, env->sc_user_names, &ukey);
504			if ((ue = RB_NEXT(user_name_tree, &env->sc_user_names,
505			&ukey)) == NULL) {
506			RB_REMOVE(user_name_tree, env->sc_user_names,
507			&ukey);
508			res.stat = YP_NOKEY;
509			return (&res);
510			}
511			RB_REMOVE(user_name_tree, env->sc_user_names, &ukey);
512			}
513			line = ue->ue_line + (strlen(ue->ue_line) + 1);
514			line = line + (strlen(line) + 1);
515			yp_make_keyval(&res, line, line);
516			return (&res);
517
518
519			} else if (strcmp(arg->map, "group.byname") == 0) {
520			memset(key, 0, sizeof(key));
521			(void)strncpy(key, arg->key.keydat_val,
522			arg->key.keydat_len);
523
524			gkey.ge_line = key;
525			if ((ge = RB_FIND(group_name_tree, env->sc_group_names,
526			&gkey)) == NULL) {
527			/*
528			* canacar's trick reloaded.
529			*/
530			RB_INSERT(group_name_tree, env->sc_group_names, &gkey);
531			if ((ge = RB_NEXT(group_name_tree, &env->sc_group_names,
532			&gkey)) == NULL) {
533			RB_REMOVE(group_name_tree, env->sc_group_names,
534			&gkey);
535			res.stat = YP_NOKEY;
536			return (&res);
537			}
538			RB_REMOVE(group_name_tree, env->sc_group_names, &gkey);
539			}
540
541			line = ge->ge_line + (strlen(ge->ge_line) + 1);
542			line = line + (strlen(line) + 1);
543			yp_make_keyval(&res, line, line);
544			return (&res);
545			} else {
546			log_debug("unknown map %s", arg->map);
547			res.stat = YP_NOMAP;
548			return (&res);
549			}
550			}
551
552			ypresp_all *
553			ypproc_all_2_svc(ypreq_nokey arg, struct svc_req req)
554			{
555			static struct ypresp_all res;
556
557			if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
558			return (&res);
559
560			svcerr_auth(req->rq_xprt, AUTH_FAILED);
561			return (NULL);
562			}
563
564			ypresp_master *
565			ypproc_master_2_svc(ypreq_nokey arg, struct svc_req req)
566			{
567			static struct ypresp_master res;
568			static char master[YPMAXPEER + 1];
569
570			memset(&res, 0, sizeof(res));
571			if (yp_valid_domain(arg->domain, (struct ypresp_val *)&res) == -1)
572			return (&res);
573			if (gethostname(master, sizeof(master)) == 0) {
574			res.peer = (peername)master;
575			res.stat = YP_TRUE;
576			} else
577			res.stat = YP_NOKEY;
578			return (&res);
579			}
580
581			ypresp_maplist *
582			ypproc_maplist_2_svc(domainname arg, struct svc_req req)
583			{
584			size_t i;
585			static struct {
586			char *name;
587			int cond;
588			} mapnames[] = {
589			{ "passwd.byname", YPMAP_PASSWD_BYNAME },
590			{ "passwd.byuid", YPMAP_PASSWD_BYUID },
591			{ "master.passwd.byname", YPMAP_MASTER_PASSWD_BYNAME },
592			{ "master.passwd.byuid", YPMAP_MASTER_PASSWD_BYUID },
593			{ "group.byname", YPMAP_GROUP_BYNAME },
594			{ "group.bygid", YPMAP_GROUP_BYGID },
595			{ "netid.byname", YPMAP_NETID_BYNAME },
596			};
597			static ypresp_maplist res;
598			static struct ypmaplist maps[sizeof(mapnames) / sizeof(mapnames[0])];
599
600			if (yp_valid_domain(arg, (struct ypresp_val )&res) == -1)
601			return (&res);
602
603			res.stat = YP_TRUE;
604			res.maps = NULL;
605			for (i = 0; i < sizeof(mapnames) / sizeof(mapnames[0]); i++) {
606			if (!(env->sc_flags & mapnames[i].cond))
607			continue;
608			maps[i].map = mapnames[i].name;
609			maps[i].next = res.maps;
610			res.maps = &maps[i];
611			}
612
613			return (&res);
614			}
615
616			void
617			yp_make_val(struct ypresp_val res, char line, int replacecolon)
618			{
619			static char buf[LINE_WIDTH];
620
621			memset(buf, 0, sizeof(buf));
622
623			if (replacecolon)
624			line[strlen(line)] = ':';
625			(void)strlcpy(buf, line, sizeof(buf));
626			if (replacecolon)
627			line[strcspn(line, ":")] = '\0';
628			log_debug("sending out %s", buf);
629
630			res->stat = YP_TRUE;
631			res->val.valdat_len = strlen(buf);
632			res->val.valdat_val = buf;
633			}
634
635			void
636			yp_make_keyval(struct ypresp_key_val res, char key, char *line)
637			{
638			static char keybuf[YPMAXRECORD+1];
639			static char buf[LINE_WIDTH];
640
641			memset(keybuf, 0, sizeof(keybuf));
642			memset(buf, 0, sizeof(buf));
643
644			(void)strlcpy(keybuf, key, sizeof(keybuf));
645			res->key.keydat_len = strlen(keybuf);
646			res->key.keydat_val = keybuf;
647
648			if (*line == '\0') {
649			res->stat = YP_NOMORE;
650			return;
651			}
652			res->stat = YP_TRUE;
653			line[strlen(line)] = ':';
654			(void)strlcpy(buf, line, sizeof(buf));
655			line[strcspn(line, ":")] = '\0';
656			log_debug("sending out %s => %s", keybuf, buf);
657
658			res->val.valdat_len = strlen(buf);
659			res->val.valdat_val = buf;
660			}