#ifndef LINT
static char rcsid[] = "$OpenBSD: ypserv.c,v 1.12 1997/11/04 07:40:52 deraadt Exp $";
#endif
#include "yp.h"
#include "ypv1.h"
#include <stdio.h>
#include <stdlib.h>
#include <rpc/pmap_clnt.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <signal.h>
#include <errno.h>
#include <sys/ttycom.h>
#ifdef __cplusplus
#include <sysent.h>
#endif
#include <memory.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <syslog.h>
#include "acl.h"
#include "yplog.h"
#include "ypdef.h"
#include <sys/wait.h>
#include <sys/ioctl.h>
#include <sys/fcntl.h>
#ifdef __STDC__
#define SIG_PF void(*)(int)
#endif
#ifdef DEBUG
#define RPC_SVC_FG
#endif
#define _RPCSVC_CLOSEDOWN 120
static int _rpcpmstart;
static int _rpcfdtype;
static int _rpcsvcdirty;
int usedns = FALSE;
char *progname = "ypserv";
char *aclfile = NULL;
void sig_child();
void sig_hup();
SVCXPRT *svcfd_create(int, u_int, u_int);
static
void _msgout(char* msg)
{
#ifdef RPC_SVC_FG
if (_rpcpmstart)
syslog(LOG_ERR, msg);
else
(void) fprintf(stderr, "%s\n", msg);
#else
syslog(LOG_ERR, msg);
#endif
}
static void
closedown()
{
if (_rpcsvcdirty == 0) {
extern fd_set svc_fdset;
static int size;
int i, openfd;
if (_rpcfdtype == SOCK_DGRAM)
exit(0);
if (size == 0) {
size = getdtablesize();
}
for (i = 0, openfd = 0; i < size && openfd < 2; i++)
if (FD_ISSET(i, &svc_fdset))
openfd++;
if (openfd <= (_rpcpmstart?0:1))
exit(0);
}
(void) alarm(_RPCSVC_CLOSEDOWN);
}
static void
ypprog_1(struct svc_req *rqstp, register SVCXPRT *transp)
{
union {
domainname ypproc_domain_1_arg;
domainname ypproc_domain_nonack_1_arg;
yprequest ypproc_match_1_arg;
yprequest ypproc_first_1_arg;
yprequest ypproc_next_1_arg;
yprequest ypproc_poll_1_arg;
yprequest ypproc_push_1_arg;
yprequest ypproc_pull_1_arg;
yprequest ypproc_get_1_arg;
} argument;
char *result;
xdrproc_t xdr_argument, xdr_result;
char *(*local)(char *, struct svc_req *);
_rpcsvcdirty = 1;
switch (rqstp->rq_proc) {
case YPOLDPROC_NULL:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ypproc_null_1_svc;
break;
case YPOLDPROC_DOMAIN:
xdr_argument = (xdrproc_t) xdr_domainname;
xdr_result = (xdrproc_t) xdr_bool;
local = (char *(*)(char *, struct svc_req *)) ypproc_domain_1_svc;
break;
case YPOLDPROC_DOMAIN_NONACK:
xdr_argument = (xdrproc_t) xdr_domainname;
xdr_result = (xdrproc_t) xdr_bool;
local = (char *(*)(char *, struct svc_req *)) ypproc_domain_nonack_1_svc;
break;
case YPOLDPROC_MATCH:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_ypresponse;
local = (char *(*)(char *, struct svc_req *)) ypproc_match_1_svc;
break;
case YPOLDPROC_FIRST:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_ypresponse;
local = (char *(*)(char *, struct svc_req *)) ypproc_first_1_svc;
break;
case YPOLDPROC_NEXT:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_ypresponse;
local = (char *(*)(char *, struct svc_req *)) ypproc_next_1_svc;
break;
case YPOLDPROC_POLL:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_ypresponse;
local = (char *(*)(char *, struct svc_req *)) ypproc_poll_1_svc;
break;
case YPOLDPROC_PUSH:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ypproc_push_1_svc;
break;
case YPOLDPROC_PULL:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ypproc_pull_1_svc;
break;
case YPOLDPROC_GET:
xdr_argument = (xdrproc_t) xdr_yprequest;
xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ypproc_get_1_svc;
break;
default:
svcerr_noproc(transp);
_rpcsvcdirty = 0;
return;
}
(void) memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(transp, xdr_argument, (caddr_t) &argument)) {
svcerr_decode(transp);
_rpcsvcdirty = 0;
return;
}
result = (*local)((char *)&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, (caddr_t) &argument)) {
_msgout("unable to free arguments");
exit(1);
}
_rpcsvcdirty = 0;
return;
}
static void
ypprog_2(struct svc_req *rqstp, register SVCXPRT *transp)
{
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;
char *result;
xdrproc_t xdr_argument, xdr_result;
char *(*local)(char *, struct svc_req *);
_rpcsvcdirty = 1;
switch (rqstp->rq_proc) {
case YPPROC_NULL:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ypproc_null_2_svc;
break;
case YPPROC_DOMAIN:
xdr_argument = (xdrproc_t) xdr_domainname;
xdr_result = (xdrproc_t) xdr_bool;
local = (char *(*)(char *, struct svc_req *)) ypproc_domain_2_svc;
break;
case YPPROC_DOMAIN_NONACK:
xdr_argument = (xdrproc_t) xdr_domainname;
xdr_result = (xdrproc_t) xdr_bool;
local = (char *(*)(char *, struct svc_req *)) ypproc_domain_nonack_2_svc;
break;
case YPPROC_MATCH:
xdr_argument = (xdrproc_t) xdr_ypreq_key;
xdr_result = (xdrproc_t) xdr_ypresp_val;
local = (char *(*)(char *, struct svc_req *)) ypproc_match_2_svc;
break;
case YPPROC_FIRST:
xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
xdr_result = (xdrproc_t) xdr_ypresp_key_val;
local = (char *(*)(char *, struct svc_req *)) ypproc_first_2_svc;
break;
case YPPROC_NEXT:
xdr_argument = (xdrproc_t) xdr_ypreq_key;
xdr_result = (xdrproc_t) xdr_ypresp_key_val;
local = (char *(*)(char *, struct svc_req *)) ypproc_next_2_svc;
break;
case YPPROC_XFR:
xdr_argument = (xdrproc_t) xdr_ypreq_xfr;
xdr_result = (xdrproc_t) xdr_ypresp_xfr;
local = (char *(*)(char *, struct svc_req *)) ypproc_xfr_2_svc;
break;
case YPPROC_CLEAR:
xdr_argument = (xdrproc_t) xdr_void;
xdr_result = (xdrproc_t) xdr_void;
local = (char *(*)(char *, struct svc_req *)) ypproc_clear_2_svc;
break;
case YPPROC_ALL:
xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
xdr_result = (xdrproc_t) xdr_ypresp_all;
local = (char *(*)(char *, struct svc_req *)) ypproc_all_2_svc;
break;
case YPPROC_MASTER:
xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
xdr_result = (xdrproc_t) xdr_ypresp_master;
local = (char *(*)(char *, struct svc_req *)) ypproc_master_2_svc;
break;
case YPPROC_ORDER:
xdr_argument = (xdrproc_t) xdr_ypreq_nokey;
xdr_result = (xdrproc_t) xdr_ypresp_order;
local = (char *(*)(char *, struct svc_req *)) ypproc_order_2_svc;
break;
case YPPROC_MAPLIST:
xdr_argument = (xdrproc_t) xdr_domainname;
xdr_result = (xdrproc_t) xdr_ypresp_maplist;
local = (char *(*)(char *, struct svc_req *)) ypproc_maplist_2_svc;
break;
default:
svcerr_noproc(transp);
_rpcsvcdirty = 0;
return;
}
(void) memset((char *)&argument, 0, sizeof (argument));
if (!svc_getargs(transp, xdr_argument, (caddr_t) &argument)) {
svcerr_decode(transp);
_rpcsvcdirty = 0;
return;
}
result = (*local)((char *)&argument, rqstp);
if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
svcerr_systemerr(transp);
}
if (!svc_freeargs(transp, xdr_argument, (caddr_t) &argument)) {
_msgout("unable to free arguments");
exit(1);
}
_rpcsvcdirty = 0;
return;
}
int
main (argc,argv)
int argc;
char *argv[];
{
register SVCXPRT *transp = NULL;
int sock;
int proto = 0;
struct sockaddr_in saddr;
int asize = sizeof (saddr);
int usage = 0;
int xflag = 0;
int allowv1 = 0;
int ch;
extern char *optarg;
while ((ch = getopt(argc, argv, "1a:dx")) != -1)
switch (ch) {
case '1':
allowv1 = TRUE;
break;
case 'a':
aclfile = optarg;
break;
case 'd':
usedns = TRUE;
break;
case 'x':
xflag = TRUE;
break;
default:
usage++;
break;
}
if (usage) {
(void)fprintf(stderr,"usage: %s [-a aclfile] [-d] [-x]\n",progname);
exit(1);
}
if (geteuid() != 0) {
(void)fprintf(stderr,"%s: must be root to run.\n",progname);
exit(1);
}
if (aclfile != NULL) {
(void)acl_init(aclfile);
} else {
(void)acl_securenet(YP_SECURENET_FILE);
}
if (xflag) {
exit(1);
};
if (getsockname(0, (struct sockaddr *)&saddr, &asize) == 0) {
int ssize = sizeof (int);
if (saddr.sin_family != AF_INET)
exit(1);
if (getsockopt(0, SOL_SOCKET, SO_TYPE,
(char *)&_rpcfdtype, &ssize) == -1)
exit(1);
sock = 0;
_rpcpmstart = 1;
proto = 0;
openlog("ypserv", LOG_PID, LOG_DAEMON);
} else {
#ifndef RPC_SVC_FG
int size;
int pid, i;
pid = fork();
if (pid < 0) {
perror("cannot fork");
exit(1);
}
if (pid)
exit(0);
size = getdtablesize();
for (i = 0; i < size; i++)
(void) close(i);
i = open("/dev/console", 2);
(void) dup2(i, 1);
(void) dup2(i, 2);
i = open("/dev/tty", 2);
if (i >= 0) {
(void) ioctl(i, TIOCNOTTY, (char *)NULL);
(void) close(i);
}
openlog("ypserv", LOG_PID, LOG_DAEMON);
#endif
sock = RPC_ANYSOCK;
(void) pmap_unset(YPPROG, YPVERS);
(void) pmap_unset(YPPROG, YPOLDVERS);
}
ypopenlog();
ypdb_init();
chdir("/");
(void)signal(SIGCHLD, sig_child);
(void)signal(SIGHUP, sig_hup);
{ FILE *pidfile = fopen(YPSERV_PID_PATH, "w");
if (pidfile != NULL) {
fprintf(pidfile, "%d\n", getpid());
fclose(pidfile);
}
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_DGRAM)) {
transp = svcudp_create(sock);
if (transp == NULL) {
_msgout("cannot create udp service.");
exit(1);
}
if (transp->xp_port >= IPPORT_RESERVED) {
_msgout("cannot allocate udp privileged port.");
exit(1);
}
if (!_rpcpmstart)
proto = IPPROTO_UDP;
if (allowv1) {
if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
_msgout("unable to register (YPPROG, YPOLDVERS, udp).");
exit(1);
}
}
if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
_msgout("unable to register (YPPROG, YPVERS, udp).");
exit(1);
}
}
if ((_rpcfdtype == 0) || (_rpcfdtype == SOCK_STREAM)) {
if (_rpcpmstart)
transp = svcfd_create(sock, 0, 0);
else
transp = svctcp_create(sock, 0, 0);
if (transp == NULL) {
_msgout("cannot create tcp service.");
exit(1);
}
if (transp->xp_port >= IPPORT_RESERVED) {
_msgout("cannot allocate tcp privileged port.");
exit(1);
}
if (!_rpcpmstart)
proto = IPPROTO_TCP;
if (allowv1) {
if (!svc_register(transp, YPPROG, YPOLDVERS, ypprog_1, proto)) {
_msgout("unable to register (YPPROG, YPOLDVERS, tcp).");
exit(1);
}
}
if (!svc_register(transp, YPPROG, YPVERS, ypprog_2, proto)) {
_msgout("unable to register (YPPROG, YPVERS, tcp).");
exit(1);
}
}
if (transp == (SVCXPRT *)NULL) {
_msgout("could not create a handle");
exit(1);
}
if (_rpcpmstart) {
(void) signal(SIGALRM, (SIG_PF) closedown);
(void) alarm(_RPCSVC_CLOSEDOWN);
}
svc_run();
_msgout("svc_run returned");
exit(1);
}
void
sig_child()
{
int save_errno = errno;
while (wait3((int *)NULL, WNOHANG, (struct rusage *)NULL) > 0)
;
errno = save_errno;
}
void
sig_hup()
{
acl_reset();
if (aclfile != NULL) {
yplog("sig_hup: reread %s",aclfile);
(void)acl_init(aclfile);
} else {
yplog("sig_hup: reread %s",YP_SECURENET_FILE);
(void)acl_securenet(YP_SECURENET_FILE);
}
}