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NetBSD/lib/libc/rpc/rpcb_clnt.c

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/* $NetBSD: rpcb_clnt.c,v 1.24 2008/07/25 14:05:25 christos Exp $ */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
/* #ident "@(#)rpcb_clnt.c 1.27 94/04/24 SMI" */
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)rpcb_clnt.c 1.30 89/06/21 Copyr 1988 Sun Micro";
#else
__RCSID("$NetBSD: rpcb_clnt.c,v 1.24 2008/07/25 14:05:25 christos Exp $");
#endif
#endif
/*
* rpcb_clnt.c
* interface to rpcbind rpc service.
*
* Copyright (C) 1988, Sun Microsystems, Inc.
*/
#include "namespace.h"
#include "reentrant.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/utsname.h>
#include <rpc/rpc.h>
#include <rpc/rpcb_prot.h>
#include <rpc/nettype.h>
#include <netconfig.h>
#ifdef PORTMAP
#include <netinet/in.h> /* FOR IPPROTO_TCP/UDP definitions */
#include <rpc/pmap_prot.h>
#endif
#include <assert.h>
#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "rpc_internal.h"
#ifdef __weak_alias
__weak_alias(rpcb_set,_rpcb_set)
__weak_alias(rpcb_unset,_rpcb_unset)
__weak_alias(rpcb_getmaps,_rpcb_getmaps)
__weak_alias(rpcb_rmtcall,_rpcb_rmtcall)
__weak_alias(rpcb_gettime,_rpcb_gettime)
__weak_alias(rpcb_taddr2uaddr,_rpcb_taddr2uaddr)
__weak_alias(rpcb_uaddr2taddr,_rpcb_uaddr2taddr)
#endif
static struct timeval tottimeout = { 60, 0 };
static const struct timeval rmttimeout = { 3, 0 };
static const char nullstring[] = "\000";
#define CACHESIZE 6
struct address_cache {
char *ac_host;
char *ac_netid;
char *ac_uaddr;
struct netbuf *ac_taddr;
struct address_cache *ac_next;
};
static struct address_cache *front;
static int cachesize;
#define CLCR_GET_RPCB_TIMEOUT 1
#define CLCR_SET_RPCB_TIMEOUT 2
extern int __rpc_lowvers;
static struct address_cache *check_cache __P((const char *, const char *));
static void delete_cache __P((struct netbuf *));
static void add_cache __P((const char *, const char *, struct netbuf *,
char *));
static CLIENT *getclnthandle __P((const char *, const struct netconfig *,
char **));
static CLIENT *local_rpcb __P((void));
static struct netbuf *got_entry __P((rpcb_entry_list_ptr,
const struct netconfig *));
/*
* This routine adjusts the timeout used for calls to the remote rpcbind.
* Also, this routine can be used to set the use of portmapper version 2
* only when doing rpc_broadcasts
* These are private routines that may not be provided in future releases.
*/
bool_t
__rpc_control(request, info)
int request;
void *info;
{
_DIAGASSERT(info != NULL);
switch (request) {
case CLCR_GET_RPCB_TIMEOUT:
*(struct timeval *)info = tottimeout;
break;
case CLCR_SET_RPCB_TIMEOUT:
tottimeout = *(struct timeval *)info;
break;
case CLCR_SET_LOWVERS:
__rpc_lowvers = *(int *)info;
break;
case CLCR_GET_LOWVERS:
*(int *)info = __rpc_lowvers;
break;
default:
return (FALSE);
}
return (TRUE);
}
/*
* It might seem that a reader/writer lock would be more reasonable here.
* However because getclnthandle(), the only user of the cache functions,
* may do a delete_cache() operation if a check_cache() fails to return an
* address useful to clnt_tli_create(), we may as well use a mutex.
*/
/*
* As it turns out, if the cache lock is *not* a reader/writer lock, we will
* block all clnt_create's if we are trying to connect to a host that's down,
* since the lock will be held all during that time.
*/
#ifdef _REENTRANT
extern rwlock_t rpcbaddr_cache_lock;
#endif
/*
* The routines check_cache(), add_cache(), delete_cache() manage the
* cache of rpcbind addresses for (host, netid).
*/
static struct address_cache *
check_cache(host, netid)
const char *host, *netid;
{
struct address_cache *cptr;
_DIAGASSERT(host != NULL);
_DIAGASSERT(netid != NULL);
/* READ LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
if (!strcmp(cptr->ac_host, host) &&
!strcmp(cptr->ac_netid, netid)) {
#ifdef ND_DEBUG
fprintf(stderr, "Found cache entry for %s: %s\n",
host, netid);
#endif
return (cptr);
}
}
return NULL;
}
static void
delete_cache(addr)
struct netbuf *addr;
{
struct address_cache *cptr, *prevptr = NULL;
_DIAGASSERT(addr != NULL);
/* WRITE LOCK HELD ON ENTRY: rpcbaddr_cache_lock */
for (cptr = front; cptr != NULL; cptr = cptr->ac_next) {
if (!memcmp(cptr->ac_taddr->buf, addr->buf, addr->len)) {
free(cptr->ac_host);
free(cptr->ac_netid);
free(cptr->ac_taddr->buf);
free(cptr->ac_taddr);
if (cptr->ac_uaddr)
free(cptr->ac_uaddr);
if (prevptr)
prevptr->ac_next = cptr->ac_next;
else
front = cptr->ac_next;
free(cptr);
cachesize--;
break;
}
prevptr = cptr;
}
}
static void
add_cache(host, netid, taddr, uaddr)
const char *host, *netid;
char *uaddr;
struct netbuf *taddr;
{
struct address_cache *ad_cache, *cptr, *prevptr;
_DIAGASSERT(host != NULL);
_DIAGASSERT(netid != NULL);
/* uaddr may be NULL */
/* taddr may be NULL ??? */
ad_cache = malloc(sizeof(*ad_cache));
if (!ad_cache) {
return;
}
ad_cache->ac_host = strdup(host);
ad_cache->ac_netid = strdup(netid);
ad_cache->ac_uaddr = uaddr ? strdup(uaddr) : NULL;
ad_cache->ac_taddr = malloc(sizeof(*ad_cache->ac_taddr));
if (!ad_cache->ac_host || !ad_cache->ac_netid || !ad_cache->ac_taddr ||
(uaddr && !ad_cache->ac_uaddr)) {
goto out;
}
ad_cache->ac_taddr->len = ad_cache->ac_taddr->maxlen = taddr->len;
ad_cache->ac_taddr->buf = malloc(taddr->len);
if (ad_cache->ac_taddr->buf == NULL) {
out:
if (ad_cache->ac_host)
free(ad_cache->ac_host);
if (ad_cache->ac_netid)
free(ad_cache->ac_netid);
if (ad_cache->ac_uaddr)
free(ad_cache->ac_uaddr);
if (ad_cache->ac_taddr)
free(ad_cache->ac_taddr);
free(ad_cache);
return;
}
memcpy(ad_cache->ac_taddr->buf, taddr->buf, taddr->len);
#ifdef ND_DEBUG
fprintf(stderr, "Added to cache: %s : %s\n", host, netid);
#endif
/* VARIABLES PROTECTED BY rpcbaddr_cache_lock: cptr */
rwlock_wrlock(&rpcbaddr_cache_lock);
if (cachesize < CACHESIZE) {
ad_cache->ac_next = front;
front = ad_cache;
cachesize++;
} else {
/* Free the last entry */
cptr = front;
prevptr = NULL;
while (cptr->ac_next) {
prevptr = cptr;
cptr = cptr->ac_next;
}
#ifdef ND_DEBUG
fprintf(stderr, "Deleted from cache: %s : %s\n",
cptr->ac_host, cptr->ac_netid);
#endif
free(cptr->ac_host);
free(cptr->ac_netid);
free(cptr->ac_taddr->buf);
free(cptr->ac_taddr);
if (cptr->ac_uaddr)
free(cptr->ac_uaddr);
if (prevptr) {
prevptr->ac_next = NULL;
ad_cache->ac_next = front;
front = ad_cache;
} else {
front = ad_cache;
ad_cache->ac_next = NULL;
}
free(cptr);
}
rwlock_unlock(&rpcbaddr_cache_lock);
}
/*
* This routine will return a client handle that is connected to the
* rpcbind. Returns NULL on error and free's everything.
*/
static CLIENT *
getclnthandle(host, nconf, targaddr)
const char *host;
const struct netconfig *nconf;
char **targaddr;
{
CLIENT *client;
struct netbuf *addr, taddr;
struct netbuf addr_to_delete;
struct __rpc_sockinfo si;
struct addrinfo hints, *res, *tres;
struct address_cache *ad_cache;
char *tmpaddr;
_DIAGASSERT(host != NULL);
_DIAGASSERT(nconf != NULL);
/* targaddr may be NULL */
/* VARIABLES PROTECTED BY rpcbaddr_cache_lock: ad_cache */
/* Get the address of the rpcbind. Check cache first */
client = NULL;
addr_to_delete.len = 0;
addr_to_delete.buf = NULL;
rwlock_rdlock(&rpcbaddr_cache_lock);
ad_cache = check_cache(host, nconf->nc_netid);
if (ad_cache != NULL) {
addr = ad_cache->ac_taddr;
client = clnt_tli_create(RPC_ANYFD, nconf, addr,
(rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
if (client != NULL) {
if (targaddr)
*targaddr = ad_cache->ac_uaddr;
rwlock_unlock(&rpcbaddr_cache_lock);
return (client);
}
addr_to_delete.len = addr->len;
addr_to_delete.buf = malloc(addr->len);
if (addr_to_delete.buf == NULL) {
addr_to_delete.len = 0;
} else {
memcpy(addr_to_delete.buf, addr->buf, addr->len);
}
}
rwlock_unlock(&rpcbaddr_cache_lock);
if (addr_to_delete.len != 0) {
/*
* Assume this may be due to cache data being
* outdated
*/
rwlock_wrlock(&rpcbaddr_cache_lock);
delete_cache(&addr_to_delete);
rwlock_unlock(&rpcbaddr_cache_lock);
free(addr_to_delete.buf);
}
if (!__rpc_nconf2sockinfo(nconf, &si)) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return NULL;
}
memset(&hints, 0, sizeof hints);
hints.ai_family = si.si_af;
hints.ai_socktype = si.si_socktype;
hints.ai_protocol = si.si_proto;
#ifdef CLNT_DEBUG
printf("trying netid %s family %d proto %d socktype %d\n",
nconf->nc_netid, si.si_af, si.si_proto, si.si_socktype);
#endif
if (getaddrinfo(host, "sunrpc", &hints, &res) != 0) {
rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
return NULL;
}
for (tres = res; tres != NULL; tres = tres->ai_next) {
taddr.buf = tres->ai_addr;
taddr.len = taddr.maxlen = tres->ai_addrlen;
#ifdef ND_DEBUG
{
char *ua;
ua = taddr2uaddr(nconf, &taddr);
fprintf(stderr, "Got it [%s]\n", ua);
free(ua);
}
#endif
#ifdef ND_DEBUG
{
int i;
fprintf(stderr, "\tnetbuf len = %d, maxlen = %d\n",
taddr.len, taddr.maxlen);
fprintf(stderr, "\tAddress is ");
for (i = 0; i < taddr.len; i++)
fprintf(stderr, "%u.", ((char *)(taddr.buf))[i]);
fprintf(stderr, "\n");
}
#endif
client = clnt_tli_create(RPC_ANYFD, nconf, &taddr,
(rpcprog_t)RPCBPROG, (rpcvers_t)RPCBVERS4, 0, 0);
#ifdef ND_DEBUG
if (! client) {
clnt_pcreateerror("rpcbind clnt interface");
}
#endif
if (client) {
tmpaddr = targaddr ? taddr2uaddr(nconf, &taddr) : NULL;
add_cache(host, nconf->nc_netid, &taddr, tmpaddr);
if (targaddr)
*targaddr = tmpaddr;
break;
}
}
freeaddrinfo(res);
return (client);
}
/* XXX */
#define IN4_LOCALHOST_STRING "127.0.0.1"
#define IN6_LOCALHOST_STRING "::1"
/*
* This routine will return a client handle that is connected to the local
* rpcbind. Returns NULL on error and free's everything.
*/
static CLIENT *
local_rpcb()
{
CLIENT *client;
static struct netconfig *loopnconf;
static const char *hostname;
#ifdef _REENTRANT
extern mutex_t loopnconf_lock;
#endif
int sock;
size_t tsize;
struct netbuf nbuf;
struct sockaddr_un sun;
/*
* Try connecting to the local rpcbind through a local socket
* first. If this doesn't work, try all transports defined in
* the netconfig file.
*/
memset(&sun, 0, sizeof sun);
sock = socket(AF_LOCAL, SOCK_STREAM, 0);
if (sock < 0)
goto try_nconf;
sun.sun_family = AF_LOCAL;
strcpy(sun.sun_path, _PATH_RPCBINDSOCK);
nbuf.len = sun.sun_len = SUN_LEN(&sun);
nbuf.maxlen = sizeof (struct sockaddr_un);
nbuf.buf = &sun;
tsize = __rpc_get_t_size(AF_LOCAL, 0, 0);
client = clnt_vc_create(sock, &nbuf, (rpcprog_t)RPCBPROG,
(rpcvers_t)RPCBVERS, tsize, tsize);
if (client != NULL) {
/* XXX - mark the socket to be closed in destructor */
(void) CLNT_CONTROL(client, CLSET_FD_CLOSE, NULL);
return client;
}
/* XXX - nobody needs this socket anymore, free the descriptor */
close(sock);
try_nconf:
/* VARIABLES PROTECTED BY loopnconf_lock: loopnconf */
mutex_lock(&loopnconf_lock);
if (loopnconf == NULL) {
struct netconfig *nconf, *tmpnconf = NULL;
void *nc_handle;
int fd;
nc_handle = setnetconfig();
if (nc_handle == NULL) {
/* fails to open netconfig file */
syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
mutex_unlock(&loopnconf_lock);
return (NULL);
}
while ((nconf = getnetconfig(nc_handle)) != NULL) {
#ifdef INET6
if ((strcmp(nconf->nc_protofmly, NC_INET6) == 0 ||
#else
if ((
#endif
strcmp(nconf->nc_protofmly, NC_INET) == 0) &&
(nconf->nc_semantics == NC_TPI_COTS ||
nconf->nc_semantics == NC_TPI_COTS_ORD)) {
fd = __rpc_nconf2fd(nconf);
/*
* Can't create a socket, assume that
* this family isn't configured in the kernel.
*/
if (fd < 0)
continue;
close(fd);
tmpnconf = nconf;
if (!strcmp(nconf->nc_protofmly, NC_INET))
hostname = IN4_LOCALHOST_STRING;
else
hostname = IN6_LOCALHOST_STRING;
}
}
if (tmpnconf == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
mutex_unlock(&loopnconf_lock);
return (NULL);
}
loopnconf = getnetconfigent(tmpnconf->nc_netid);
/* loopnconf is never freed */
endnetconfig(nc_handle);
}
mutex_unlock(&loopnconf_lock);
client = getclnthandle(hostname, loopnconf, NULL);
return (client);
}
/*
* Set a mapping between program, version and address.
* Calls the rpcbind service to do the mapping.
*/
bool_t
rpcb_set(program, version, nconf, address)
rpcprog_t program;
rpcvers_t version;
const struct netconfig *nconf; /* Network structure of transport */
const struct netbuf *address; /* Services netconfig address */
{
CLIENT *client;
bool_t rslt = FALSE;
RPCB parms;
char uidbuf[32];
/* parameter checking */
if (nconf == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (FALSE);
}
if (address == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
return (FALSE);
}
client = local_rpcb();
if (! client) {
return (FALSE);
}
/* convert to universal */
parms.r_addr = taddr2uaddr(__UNCONST(nconf), __UNCONST(address));
if (!parms.r_addr) {
CLNT_DESTROY(client);
rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
return (FALSE); /* no universal address */
}
parms.r_prog = program;
parms.r_vers = version;
parms.r_netid = nconf->nc_netid;
/*
* Though uid is not being used directly, we still send it for
* completeness. For non-unix platforms, perhaps some other
* string or an empty string can be sent.
*/
(void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
parms.r_owner = uidbuf;
CLNT_CALL(client, (rpcproc_t)RPCBPROC_SET, (xdrproc_t) xdr_rpcb,
(char *)(void *)&parms, (xdrproc_t) xdr_bool,
(char *)(void *)&rslt, tottimeout);
CLNT_DESTROY(client);
free(parms.r_addr);
return (rslt);
}
/*
* Remove the mapping between program, version and netbuf address.
* Calls the rpcbind service to do the un-mapping.
* If netbuf is NULL, unset for all the transports, otherwise unset
* only for the given transport.
*/
bool_t
rpcb_unset(program, version, nconf)
rpcprog_t program;
rpcvers_t version;
const struct netconfig *nconf;
{
CLIENT *client;
bool_t rslt = FALSE;
RPCB parms;
char uidbuf[32];
client = local_rpcb();
if (! client) {
return (FALSE);
}
parms.r_prog = program;
parms.r_vers = version;
if (nconf)
parms.r_netid = nconf->nc_netid;
else {
parms.r_netid = __UNCONST(&nullstring[0]); /* unsets all */
}
parms.r_addr = __UNCONST(&nullstring[0]);
(void) snprintf(uidbuf, sizeof uidbuf, "%d", geteuid());
parms.r_owner = uidbuf;
CLNT_CALL(client, (rpcproc_t)RPCBPROC_UNSET, (xdrproc_t) xdr_rpcb,
(char *)(void *)&parms, (xdrproc_t) xdr_bool,
(char *)(void *)&rslt, tottimeout);
CLNT_DESTROY(client);
return (rslt);
}
/*
* From the merged list, find the appropriate entry
*/
static struct netbuf *
got_entry(relp, nconf)
rpcb_entry_list_ptr relp;
const struct netconfig *nconf;
{
struct netbuf *na = NULL;
rpcb_entry_list_ptr sp;
rpcb_entry *rmap;
_DIAGASSERT(nconf != NULL);
for (sp = relp; sp != NULL; sp = sp->rpcb_entry_next) {
rmap = &sp->rpcb_entry_map;
if ((strcmp(nconf->nc_proto, rmap->r_nc_proto) == 0) &&
(strcmp(nconf->nc_protofmly, rmap->r_nc_protofmly) == 0) &&
(nconf->nc_semantics == rmap->r_nc_semantics) &&
(rmap->r_maddr != NULL) && (rmap->r_maddr[0] != 0)) {
na = uaddr2taddr(nconf, rmap->r_maddr);
#ifdef ND_DEBUG
fprintf(stderr, "\tRemote address is [%s].\n",
rmap->r_maddr);
if (!na)
fprintf(stderr,
"\tCouldn't resolve remote address!\n");
#endif
break;
}
}
return (na);
}
/*
* An internal function which optimizes rpcb_getaddr function. It also
* returns the client handle that it uses to contact the remote rpcbind.
*
* The algorithm used: If the transports is TCP or UDP, it first tries
* version 2 (portmap), 4 and then 3 (svr4). This order should be
* changed in the next OS release to 4, 2 and 3. We are assuming that by
* that time, version 4 would be available on many machines on the network.
* With this algorithm, we get performance as well as a plan for
* obsoleting version 2.
*
* For all other transports, the algorithm remains as 4 and then 3.
*
* XXX: Due to some problems with t_connect(), we do not reuse the same client
* handle for COTS cases and hence in these cases we do not return the
* client handle. This code will change if t_connect() ever
* starts working properly. Also look under clnt_vc.c.
*/
struct netbuf *
__rpcb_findaddr(program, version, nconf, host, clpp)
rpcprog_t program;
rpcvers_t version;
const struct netconfig *nconf;
const char *host;
CLIENT **clpp;
{
CLIENT *client = NULL;
RPCB parms;
enum clnt_stat clnt_st;
char *ua = NULL;
rpcvers_t vers;
struct netbuf *address = NULL;
rpcvers_t start_vers = RPCBVERS4;
struct netbuf servaddr;
/* nconf is handled below */
_DIAGASSERT(host != NULL);
/* clpp may be NULL */
/* parameter checking */
if (nconf == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (NULL);
}
parms.r_addr = NULL;
#ifdef PORTMAP
/* Try version 2 for TCP or UDP */
if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
u_short port = 0;
struct netbuf remote;
rpcvers_t pmapvers = 2;
struct pmap pmapparms;
/*
* Try UDP only - there are some portmappers out
* there that use UDP only.
*/
if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
struct netconfig *newnconf;
if ((newnconf = getnetconfigent("udp")) == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (NULL);
}
client = getclnthandle(host, newnconf, &parms.r_addr);
freenetconfigent(newnconf);
} else {
client = getclnthandle(host, nconf, &parms.r_addr);
}
if (client == NULL) {
return (NULL);
}
/* Set the version */
CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&pmapvers);
pmapparms.pm_prog = program;
pmapparms.pm_vers = version;
pmapparms.pm_prot = strcmp(nconf->nc_proto, NC_TCP) ?
IPPROTO_UDP : IPPROTO_TCP;
pmapparms.pm_port = 0; /* not needed */
clnt_st = CLNT_CALL(client, (rpcproc_t)PMAPPROC_GETPORT,
(xdrproc_t) xdr_pmap, (caddr_t)(void *)&pmapparms,
(xdrproc_t) xdr_u_short, (caddr_t)(void *)&port,
tottimeout);
if (clnt_st != RPC_SUCCESS) {
if ((clnt_st == RPC_PROGVERSMISMATCH) ||
(clnt_st == RPC_PROGUNAVAIL))
goto try_rpcbind; /* Try different versions */
rpc_createerr.cf_stat = RPC_PMAPFAILURE;
clnt_geterr(client, &rpc_createerr.cf_error);
goto error;
} else if (port == 0) {
address = NULL;
rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
goto error;
}
port = htons(port);
CLNT_CONTROL(client, CLGET_SVC_ADDR, (char *)(void *)&remote);
if (((address = malloc(sizeof(struct netbuf))) == NULL) ||
((address->buf = malloc(remote.len)) == NULL)) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
clnt_geterr(client, &rpc_createerr.cf_error);
if (address) {
free(address);
address = NULL;
}
goto error;
}
memcpy(address->buf, remote.buf, remote.len);
memcpy(&((char *)address->buf)[sizeof (short)],
(char *)(void *)&port, sizeof (short));
address->len = address->maxlen = remote.len;
goto done;
}
#endif
try_rpcbind:
/*
* Now we try version 4 and then 3.
* We also send the remote system the address we used to
* contact it in case it can help to connect back with us
*/
parms.r_prog = program;
parms.r_vers = version;
parms.r_owner = __UNCONST(&nullstring[0]); /* not needed; */
/* just for xdring */
parms.r_netid = nconf->nc_netid; /* not really needed */
/*
* If a COTS transport is being used, try getting address via CLTS
* transport. This works only with version 4.
* NOTE: This is being done for all transports EXCEPT LOOPBACK
* because with loopback the cost to go to a COTS is same as
* the cost to go through CLTS, plus you get the advantage of
* finding out immediately if the local rpcbind process is dead.
*/
#if 1
if ((nconf->nc_semantics == NC_TPI_COTS_ORD ||
nconf->nc_semantics == NC_TPI_COTS) &&
(strcmp(nconf->nc_protofmly, NC_LOOPBACK) != 0))
#else
if (client != NULL) {
CLNT_DESTROY(client);
client = NULL;
}
if (nconf->nc_semantics == NC_TPI_CLTS)
#endif
{
void *handle;
struct netconfig *nconf_clts;
rpcb_entry_list_ptr relp = NULL;
if (client == NULL) {
/* This did not go through the above PORTMAP/TCP code */
#if 1
if ((handle = __rpc_setconf("datagram_v")) != NULL)
#else
if ((handle = __rpc_setconf("circuit_v")) != NULL)
#endif
{
while ((nconf_clts = __rpc_getconf(handle))
!= NULL) {
if (strcmp(nconf_clts->nc_protofmly,
nconf->nc_protofmly) != 0) {
continue;
}
client = getclnthandle(host, nconf_clts,
&parms.r_addr);
break;
}
__rpc_endconf(handle);
}
if (client == NULL)
goto regular_rpcbind; /* Go the regular way */
} else {
/* This is a UDP PORTMAP handle. Change to version 4 */
vers = RPCBVERS4;
CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
}
/*
* We also send the remote system the address we used to
* contact it in case it can help it connect back with us
*/
if (parms.r_addr == NULL) {
/* for XDRing */
parms.r_addr = __UNCONST(&nullstring[0]);
}
clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDRLIST,
(xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
(xdrproc_t) xdr_rpcb_entry_list_ptr,
(char *)(void *)&relp, tottimeout);
if (clnt_st == RPC_SUCCESS) {
if ((address = got_entry(relp, nconf)) != NULL) {
xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
(char *)(void *)&relp);
CLNT_CONTROL(client, CLGET_SVC_ADDR,
(char *)(void *)&servaddr);
__rpc_fixup_addr(address, &servaddr);
goto done;
}
/* Entry not found for this transport */
xdr_free((xdrproc_t) xdr_rpcb_entry_list_ptr,
(char *)(void *)&relp);
/*
* XXX: should have perhaps returned with error but
* since the remote machine might not always be able
* to send the address on all transports, we try the
* regular way with regular_rpcbind
*/
goto regular_rpcbind;
} else if ((clnt_st == RPC_PROGVERSMISMATCH) ||
(clnt_st == RPC_PROGUNAVAIL)) {
start_vers = RPCBVERS; /* Try version 3 now */
goto regular_rpcbind; /* Try different versions */
} else {
rpc_createerr.cf_stat = RPC_PMAPFAILURE;
clnt_geterr(client, &rpc_createerr.cf_error);
goto error;
}
}
regular_rpcbind:
/* Now the same transport is to be used to get the address */
#if 1
if (client && ((nconf->nc_semantics == NC_TPI_COTS_ORD) ||
(nconf->nc_semantics == NC_TPI_COTS)))
#else
if (client && nconf->nc_semantics == NC_TPI_CLTS)
#endif
{
/* A CLTS type of client - destroy it */
CLNT_DESTROY(client);
client = NULL;
}
if (client == NULL) {
client = getclnthandle(host, nconf, &parms.r_addr);
if (client == NULL) {
goto error;
}
}
if (parms.r_addr == NULL)
parms.r_addr = __UNCONST(&nullstring[0]);
/* First try from start_vers and then version 3 (RPCBVERS) */
for (vers = start_vers; vers >= RPCBVERS; vers--) {
/* Set the version */
CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETADDR,
(xdrproc_t) xdr_rpcb, (char *)(void *)&parms,
(xdrproc_t) xdr_wrapstring, (char *)(void *) &ua,
tottimeout);
if (clnt_st == RPC_SUCCESS) {
if ((ua == NULL) || (ua[0] == 0)) {
/* address unknown */
rpc_createerr.cf_stat = RPC_PROGNOTREGISTERED;
goto error;
}
address = uaddr2taddr(nconf, ua);
#ifdef ND_DEBUG
fprintf(stderr, "\tRemote address is [%s]\n", ua);
if (!address)
fprintf(stderr,
"\tCouldn't resolve remote address!\n");
#endif
xdr_free((xdrproc_t)xdr_wrapstring,
(char *)(void *)&ua);
if (! address) {
/* We don't know about your universal address */
rpc_createerr.cf_stat = RPC_N2AXLATEFAILURE;
goto error;
}
CLNT_CONTROL(client, CLGET_SVC_ADDR,
(char *)(void *)&servaddr);
__rpc_fixup_addr(address, &servaddr);
goto done;
} else if (clnt_st == RPC_PROGVERSMISMATCH) {
struct rpc_err rpcerr;
clnt_geterr(client, &rpcerr);
if (rpcerr.re_vers.low > RPCBVERS4)
goto error; /* a new version, can't handle */
} else if (clnt_st != RPC_PROGUNAVAIL) {
/* Cant handle this error */
rpc_createerr.cf_stat = clnt_st;
clnt_geterr(client, &rpc_createerr.cf_error);
goto error;
}
}
error:
if (client) {
CLNT_DESTROY(client);
client = NULL;
}
done:
if (nconf->nc_semantics != NC_TPI_CLTS) {
/* This client is the connectionless one */
if (client) {
CLNT_DESTROY(client);
client = NULL;
}
}
if (clpp) {
*clpp = client;
} else if (client) {
CLNT_DESTROY(client);
}
return (address);
}
/*
* Find the mapped address for program, version.
* Calls the rpcbind service remotely to do the lookup.
* Uses the transport specified in nconf.
* Returns FALSE (0) if no map exists, else returns 1.
*
* Assuming that the address is all properly allocated
*/
int
rpcb_getaddr(program, version, nconf, address, host)
rpcprog_t program;
rpcvers_t version;
const struct netconfig *nconf;
struct netbuf *address;
const char *host;
{
struct netbuf *na;
_DIAGASSERT(address != NULL);
if ((na = __rpcb_findaddr(program, version, nconf,
host, NULL)) == NULL)
return (FALSE);
if (na->len > address->maxlen) {
/* Too long address */
free(na->buf);
free(na);
rpc_createerr.cf_stat = RPC_FAILED;
return (FALSE);
}
memcpy(address->buf, na->buf, (size_t)na->len);
address->len = na->len;
free(na->buf);
free(na);
return (TRUE);
}
/*
* Get a copy of the current maps.
* Calls the rpcbind service remotely to get the maps.
*
* It returns only a list of the services
* It returns NULL on failure.
*/
rpcblist *
rpcb_getmaps(nconf, host)
const struct netconfig *nconf;
const char *host;
{
rpcblist_ptr head = NULL;
CLIENT *client;
enum clnt_stat clnt_st;
rpcvers_t vers = 0;
client = getclnthandle(host, nconf, NULL);
if (client == NULL) {
return (head);
}
clnt_st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
(xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
(char *)(void *)&head, tottimeout);
if (clnt_st == RPC_SUCCESS)
goto done;
if ((clnt_st != RPC_PROGVERSMISMATCH) &&
(clnt_st != RPC_PROGUNAVAIL)) {
rpc_createerr.cf_stat = RPC_RPCBFAILURE;
clnt_geterr(client, &rpc_createerr.cf_error);
goto done;
}
/* fall back to earlier version */
CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
if (vers == RPCBVERS4) {
vers = RPCBVERS;
CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_DUMP,
(xdrproc_t) xdr_void, NULL, (xdrproc_t) xdr_rpcblist_ptr,
(char *)(void *)&head, tottimeout) == RPC_SUCCESS)
goto done;
}
rpc_createerr.cf_stat = RPC_RPCBFAILURE;
clnt_geterr(client, &rpc_createerr.cf_error);
done:
CLNT_DESTROY(client);
return (head);
}
/*
* rpcbinder remote-call-service interface.
* This routine is used to call the rpcbind remote call service
* which will look up a service program in the address maps, and then
* remotely call that routine with the given parameters. This allows
* programs to do a lookup and call in one step.
*/
enum clnt_stat
rpcb_rmtcall(nconf, host, prog, vers, proc, xdrargs, argsp,
xdrres, resp, tout, addr_ptr)
const struct netconfig *nconf; /* Netconfig structure */
const char *host; /* Remote host name */
rpcprog_t prog;
rpcvers_t vers;
rpcproc_t proc; /* Remote proc identifiers */
xdrproc_t xdrargs, xdrres; /* XDR routines */
const char *argsp; /* Argument */
caddr_t resp; /* Result */
struct timeval tout; /* Timeout value for this call */
const struct netbuf *addr_ptr; /* Preallocated netbuf address */
{
CLIENT *client;
enum clnt_stat stat;
struct r_rpcb_rmtcallargs a;
struct r_rpcb_rmtcallres r;
rpcvers_t rpcb_vers;
stat = RPC_FAILED; /* XXXGCC -Wuninitialized [dreamcast] */
client = getclnthandle(host, nconf, NULL);
if (client == NULL) {
return (RPC_FAILED);
}
CLNT_CONTROL(client, CLSET_RETRY_TIMEOUT, __UNCONST(&rmttimeout));
a.prog = prog;
a.vers = vers;
a.proc = proc;
a.args.args_val = argsp;
a.xdr_args = xdrargs;
r.addr = NULL;
r.results.results_val = resp;
r.xdr_res = xdrres;
for (rpcb_vers = RPCBVERS4; rpcb_vers >= RPCBVERS; rpcb_vers--) {
CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&rpcb_vers);
stat = CLNT_CALL(client, (rpcproc_t)RPCBPROC_CALLIT,
(xdrproc_t) xdr_rpcb_rmtcallargs, (char *)(void *)&a,
(xdrproc_t) xdr_rpcb_rmtcallres, (char *)(void *)&r, tout);
if ((stat == RPC_SUCCESS) && (addr_ptr != NULL)) {
struct netbuf *na;
na = uaddr2taddr(__UNCONST(nconf), r.addr);
if (!na) {
stat = RPC_N2AXLATEFAILURE;
((struct netbuf *)__UNCONST(addr_ptr))->len = 0;
goto error;
}
if (na->len > addr_ptr->maxlen) {
/* Too long address */
stat = RPC_FAILED; /* XXX A better error no */
free(na->buf);
free(na);
((struct netbuf *)__UNCONST(addr_ptr))->len = 0;
goto error;
}
memcpy(addr_ptr->buf, na->buf, (size_t)na->len);
((struct netbuf *)__UNCONST(addr_ptr))->len = na->len;
free(na->buf);
free(na);
break;
} else if ((stat != RPC_PROGVERSMISMATCH) &&
(stat != RPC_PROGUNAVAIL)) {
goto error;
}
}
error:
CLNT_DESTROY(client);
if (r.addr)
xdr_free((xdrproc_t) xdr_wrapstring, (char *)(void *)&r.addr);
return (stat);
}
/*
* Gets the time on the remote host.
* Returns 1 if succeeds else 0.
*/
bool_t
rpcb_gettime(host, timep)
const char *host;
time_t *timep;
{
CLIENT *client = NULL;
void *handle;
struct netconfig *nconf;
rpcvers_t vers;
enum clnt_stat st;
if ((host == NULL) || (host[0] == 0)) {
time(timep);
return (TRUE);
}
if ((handle = __rpc_setconf("netpath")) == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (FALSE);
}
rpc_createerr.cf_stat = RPC_SUCCESS;
while (client == NULL) {
if ((nconf = __rpc_getconf(handle)) == NULL) {
if (rpc_createerr.cf_stat == RPC_SUCCESS)
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
break;
}
client = getclnthandle(host, nconf, NULL);
if (client)
break;
}
__rpc_endconf(handle);
if (client == NULL) {
return (FALSE);
}
st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
(xdrproc_t) xdr_void, NULL,
(xdrproc_t) xdr_int, (char *)(void *)timep, tottimeout);
if ((st == RPC_PROGVERSMISMATCH) || (st == RPC_PROGUNAVAIL)) {
CLNT_CONTROL(client, CLGET_VERS, (char *)(void *)&vers);
if (vers == RPCBVERS4) {
/* fall back to earlier version */
vers = RPCBVERS;
CLNT_CONTROL(client, CLSET_VERS, (char *)(void *)&vers);
st = CLNT_CALL(client, (rpcproc_t)RPCBPROC_GETTIME,
(xdrproc_t) xdr_void, NULL,
(xdrproc_t) xdr_int, (char *)(void *)timep,
tottimeout);
}
}
CLNT_DESTROY(client);
return (st == RPC_SUCCESS? TRUE: FALSE);
}
/*
* Converts taddr to universal address. This routine should never
* really be called because local n2a libraries are always provided.
*/
char *
rpcb_taddr2uaddr(nconf, taddr)
struct netconfig *nconf;
struct netbuf *taddr;
{
CLIENT *client;
char *uaddr = NULL;
/* parameter checking */
if (nconf == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (NULL);
}
if (taddr == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
return (NULL);
}
client = local_rpcb();
if (! client) {
return (NULL);
}
CLNT_CALL(client, (rpcproc_t)RPCBPROC_TADDR2UADDR,
(xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
(xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr, tottimeout);
CLNT_DESTROY(client);
return (uaddr);
}
/*
* Converts universal address to netbuf. This routine should never
* really be called because local n2a libraries are always provided.
*/
struct netbuf *
rpcb_uaddr2taddr(nconf, uaddr)
struct netconfig *nconf;
char *uaddr;
{
CLIENT *client;
struct netbuf *taddr;
/* parameter checking */
if (nconf == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (NULL);
}
if (uaddr == NULL) {
rpc_createerr.cf_stat = RPC_UNKNOWNADDR;
return (NULL);
}
client = local_rpcb();
if (! client) {
return (NULL);
}
taddr = (struct netbuf *)calloc(1, sizeof (struct netbuf));
if (taddr == NULL) {
CLNT_DESTROY(client);
return (NULL);
}
if (CLNT_CALL(client, (rpcproc_t)RPCBPROC_UADDR2TADDR,
(xdrproc_t) xdr_wrapstring, (char *)(void *)&uaddr,
(xdrproc_t) xdr_netbuf, (char *)(void *)taddr,
tottimeout) != RPC_SUCCESS) {
free(taddr);
taddr = NULL;
}
CLNT_DESTROY(client);
return (taddr);
}
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