mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
2e26eba4b9
Reviewed by: phk Obtained from: NetBSD
604 lines
16 KiB
C
604 lines
16 KiB
C
/* $NetBSD: svc_dg.c,v 1.4 2000/07/06 03:10:35 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 "@(#)svc_dg.c 1.17 94/04/24 SMI" */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/*
|
|
* svc_dg.c, Server side for connectionless RPC.
|
|
*
|
|
* Does some caching in the hopes of achieving execute-at-most-once semantics.
|
|
*/
|
|
|
|
#include "namespace.h"
|
|
#include "reentrant.h"
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <rpc/rpc.h>
|
|
#include <rpc/svc_dg.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#ifdef RPC_CACHE_DEBUG
|
|
#include <netconfig.h>
|
|
#include <netdir.h>
|
|
#endif
|
|
#include <err.h>
|
|
#include "un-namespace.h"
|
|
|
|
#include "rpc_com.h"
|
|
|
|
#define su_data(xprt) ((struct svc_dg_data *)(xprt->xp_p2))
|
|
#define rpc_buffer(xprt) ((xprt)->xp_p1)
|
|
|
|
#ifndef MAX
|
|
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
|
|
#endif
|
|
|
|
static void svc_dg_ops(SVCXPRT *);
|
|
static enum xprt_stat svc_dg_stat(SVCXPRT *);
|
|
static bool_t svc_dg_recv(SVCXPRT *, struct rpc_msg *);
|
|
static bool_t svc_dg_reply(SVCXPRT *, struct rpc_msg *);
|
|
static bool_t svc_dg_getargs(SVCXPRT *, xdrproc_t, void *);
|
|
static bool_t svc_dg_freeargs(SVCXPRT *, xdrproc_t, void *);
|
|
static void svc_dg_destroy(SVCXPRT *);
|
|
static bool_t svc_dg_control(SVCXPRT *, const u_int, void *);
|
|
static int cache_get(SVCXPRT *, struct rpc_msg *, char **, size_t *);
|
|
static void cache_set(SVCXPRT *, size_t);
|
|
int svc_dg_enablecache(SVCXPRT *, u_int);
|
|
|
|
/*
|
|
* Usage:
|
|
* xprt = svc_dg_create(sock, sendsize, recvsize);
|
|
* Does other connectionless specific initializations.
|
|
* Once *xprt is initialized, it is registered.
|
|
* see (svc.h, xprt_register). If recvsize or sendsize are 0 suitable
|
|
* system defaults are chosen.
|
|
* The routines returns NULL if a problem occurred.
|
|
*/
|
|
static const char svc_dg_str[] = "svc_dg_create: %s";
|
|
static const char svc_dg_err1[] = "could not get transport information";
|
|
static const char svc_dg_err2[] = " transport does not support data transfer";
|
|
static const char __no_mem_str[] = "out of memory";
|
|
|
|
SVCXPRT *
|
|
svc_dg_create(fd, sendsize, recvsize)
|
|
int fd;
|
|
u_int sendsize;
|
|
u_int recvsize;
|
|
{
|
|
SVCXPRT *xprt;
|
|
struct svc_dg_data *su = NULL;
|
|
struct __rpc_sockinfo si;
|
|
struct sockaddr_storage ss;
|
|
socklen_t slen;
|
|
|
|
if (!__rpc_fd2sockinfo(fd, &si)) {
|
|
warnx(svc_dg_str, svc_dg_err1);
|
|
return (NULL);
|
|
}
|
|
/*
|
|
* Find the receive and the send size
|
|
*/
|
|
sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
|
|
recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
|
|
if ((sendsize == 0) || (recvsize == 0)) {
|
|
warnx(svc_dg_str, svc_dg_err2);
|
|
return (NULL);
|
|
}
|
|
|
|
xprt = mem_alloc(sizeof (SVCXPRT));
|
|
if (xprt == NULL)
|
|
goto freedata;
|
|
memset(xprt, 0, sizeof (SVCXPRT));
|
|
|
|
su = mem_alloc(sizeof (*su));
|
|
if (su == NULL)
|
|
goto freedata;
|
|
su->su_iosz = ((MAX(sendsize, recvsize) + 3) / 4) * 4;
|
|
if ((rpc_buffer(xprt) = mem_alloc(su->su_iosz)) == NULL)
|
|
goto freedata;
|
|
xdrmem_create(&(su->su_xdrs), rpc_buffer(xprt), su->su_iosz,
|
|
XDR_DECODE);
|
|
su->su_cache = NULL;
|
|
xprt->xp_fd = fd;
|
|
xprt->xp_p2 = su;
|
|
xprt->xp_verf.oa_base = su->su_verfbody;
|
|
svc_dg_ops(xprt);
|
|
xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
|
|
|
|
slen = sizeof ss;
|
|
if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
|
|
goto freedata;
|
|
xprt->xp_ltaddr.buf = mem_alloc(sizeof (struct sockaddr_storage));
|
|
xprt->xp_ltaddr.maxlen = sizeof (struct sockaddr_storage);
|
|
xprt->xp_ltaddr.len = slen;
|
|
memcpy(xprt->xp_ltaddr.buf, &ss, slen);
|
|
|
|
xprt_register(xprt);
|
|
return (xprt);
|
|
freedata:
|
|
(void) warnx(svc_dg_str, __no_mem_str);
|
|
if (xprt) {
|
|
if (su)
|
|
(void) mem_free(su, sizeof (*su));
|
|
(void) mem_free(xprt, sizeof (SVCXPRT));
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*ARGSUSED*/
|
|
static enum xprt_stat
|
|
svc_dg_stat(xprt)
|
|
SVCXPRT *xprt;
|
|
{
|
|
return (XPRT_IDLE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_dg_recv(xprt, msg)
|
|
SVCXPRT *xprt;
|
|
struct rpc_msg *msg;
|
|
{
|
|
struct svc_dg_data *su = su_data(xprt);
|
|
XDR *xdrs = &(su->su_xdrs);
|
|
char *reply;
|
|
struct sockaddr_storage ss;
|
|
socklen_t alen;
|
|
size_t replylen;
|
|
ssize_t rlen;
|
|
|
|
again:
|
|
alen = sizeof (struct sockaddr_storage);
|
|
rlen = _recvfrom(xprt->xp_fd, rpc_buffer(xprt), su->su_iosz, 0,
|
|
(struct sockaddr *)(void *)&ss, &alen);
|
|
if (rlen == -1 && errno == EINTR)
|
|
goto again;
|
|
if (rlen == -1 || (rlen < (ssize_t)(4 * sizeof (u_int32_t))))
|
|
return (FALSE);
|
|
if (xprt->xp_rtaddr.len < alen) {
|
|
if (xprt->xp_rtaddr.len != 0)
|
|
mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.len);
|
|
xprt->xp_rtaddr.buf = mem_alloc(alen);
|
|
xprt->xp_rtaddr.len = alen;
|
|
}
|
|
memcpy(xprt->xp_rtaddr.buf, &ss, alen);
|
|
#ifdef PORTMAP
|
|
if (ss.ss_family == AF_INET) {
|
|
xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
|
|
xprt->xp_addrlen = sizeof (struct sockaddr_in);
|
|
}
|
|
#endif /* PORTMAP */
|
|
xdrs->x_op = XDR_DECODE;
|
|
XDR_SETPOS(xdrs, 0);
|
|
if (! xdr_callmsg(xdrs, msg)) {
|
|
return (FALSE);
|
|
}
|
|
su->su_xid = msg->rm_xid;
|
|
if (su->su_cache != NULL) {
|
|
if (cache_get(xprt, msg, &reply, &replylen)) {
|
|
(void)_sendto(xprt->xp_fd, reply, replylen, 0,
|
|
(struct sockaddr *)(void *)&ss, alen);
|
|
return (FALSE);
|
|
}
|
|
}
|
|
return (TRUE);
|
|
}
|
|
|
|
static bool_t
|
|
svc_dg_reply(xprt, msg)
|
|
SVCXPRT *xprt;
|
|
struct rpc_msg *msg;
|
|
{
|
|
struct svc_dg_data *su = su_data(xprt);
|
|
XDR *xdrs = &(su->su_xdrs);
|
|
bool_t stat = FALSE;
|
|
size_t slen;
|
|
|
|
xdrs->x_op = XDR_ENCODE;
|
|
XDR_SETPOS(xdrs, 0);
|
|
msg->rm_xid = su->su_xid;
|
|
if (xdr_replymsg(xdrs, msg)) {
|
|
slen = XDR_GETPOS(xdrs);
|
|
if (_sendto(xprt->xp_fd, rpc_buffer(xprt), slen, 0,
|
|
(struct sockaddr *)xprt->xp_rtaddr.buf,
|
|
(socklen_t)xprt->xp_rtaddr.len) == (ssize_t) slen) {
|
|
stat = TRUE;
|
|
if (su->su_cache)
|
|
cache_set(xprt, slen);
|
|
}
|
|
}
|
|
return (stat);
|
|
}
|
|
|
|
static bool_t
|
|
svc_dg_getargs(xprt, xdr_args, args_ptr)
|
|
SVCXPRT *xprt;
|
|
xdrproc_t xdr_args;
|
|
void *args_ptr;
|
|
{
|
|
return (*xdr_args)(&(su_data(xprt)->su_xdrs), args_ptr);
|
|
}
|
|
|
|
static bool_t
|
|
svc_dg_freeargs(xprt, xdr_args, args_ptr)
|
|
SVCXPRT *xprt;
|
|
xdrproc_t xdr_args;
|
|
void *args_ptr;
|
|
{
|
|
XDR *xdrs = &(su_data(xprt)->su_xdrs);
|
|
|
|
xdrs->x_op = XDR_FREE;
|
|
return (*xdr_args)(xdrs, args_ptr);
|
|
}
|
|
|
|
static void
|
|
svc_dg_destroy(xprt)
|
|
SVCXPRT *xprt;
|
|
{
|
|
struct svc_dg_data *su = su_data(xprt);
|
|
|
|
xprt_unregister(xprt);
|
|
if (xprt->xp_fd != -1)
|
|
(void)_close(xprt->xp_fd);
|
|
XDR_DESTROY(&(su->su_xdrs));
|
|
(void) mem_free(rpc_buffer(xprt), su->su_iosz);
|
|
(void) mem_free(su, sizeof (*su));
|
|
if (xprt->xp_rtaddr.buf)
|
|
(void) mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
|
|
if (xprt->xp_ltaddr.buf)
|
|
(void) mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
|
|
if (xprt->xp_tp)
|
|
(void) free(xprt->xp_tp);
|
|
(void) mem_free(xprt, sizeof (SVCXPRT));
|
|
}
|
|
|
|
static bool_t
|
|
/*ARGSUSED*/
|
|
svc_dg_control(xprt, rq, in)
|
|
SVCXPRT *xprt;
|
|
const u_int rq;
|
|
void *in;
|
|
{
|
|
return (FALSE);
|
|
}
|
|
|
|
static void
|
|
svc_dg_ops(xprt)
|
|
SVCXPRT *xprt;
|
|
{
|
|
static struct xp_ops ops;
|
|
static struct xp_ops2 ops2;
|
|
extern mutex_t ops_lock;
|
|
|
|
/* VARIABLES PROTECTED BY ops_lock: ops */
|
|
|
|
mutex_lock(&ops_lock);
|
|
if (ops.xp_recv == NULL) {
|
|
ops.xp_recv = svc_dg_recv;
|
|
ops.xp_stat = svc_dg_stat;
|
|
ops.xp_getargs = svc_dg_getargs;
|
|
ops.xp_reply = svc_dg_reply;
|
|
ops.xp_freeargs = svc_dg_freeargs;
|
|
ops.xp_destroy = svc_dg_destroy;
|
|
ops2.xp_control = svc_dg_control;
|
|
}
|
|
xprt->xp_ops = &ops;
|
|
xprt->xp_ops2 = &ops2;
|
|
mutex_unlock(&ops_lock);
|
|
}
|
|
|
|
/* The CACHING COMPONENT */
|
|
|
|
/*
|
|
* Could have been a separate file, but some part of it depends upon the
|
|
* private structure of the client handle.
|
|
*
|
|
* Fifo cache for cl server
|
|
* Copies pointers to reply buffers into fifo cache
|
|
* Buffers are sent again if retransmissions are detected.
|
|
*/
|
|
|
|
#define SPARSENESS 4 /* 75% sparse */
|
|
|
|
#define ALLOC(type, size) \
|
|
(type *) mem_alloc((sizeof (type) * (size)))
|
|
|
|
#define MEMZERO(addr, type, size) \
|
|
(void) memset((void *) (addr), 0, sizeof (type) * (int) (size))
|
|
|
|
#define FREE(addr, type, size) \
|
|
mem_free((addr), (sizeof (type) * (size)))
|
|
|
|
/*
|
|
* An entry in the cache
|
|
*/
|
|
typedef struct cache_node *cache_ptr;
|
|
struct cache_node {
|
|
/*
|
|
* Index into cache is xid, proc, vers, prog and address
|
|
*/
|
|
u_int32_t cache_xid;
|
|
rpcproc_t cache_proc;
|
|
rpcvers_t cache_vers;
|
|
rpcprog_t cache_prog;
|
|
struct netbuf cache_addr;
|
|
/*
|
|
* The cached reply and length
|
|
*/
|
|
char *cache_reply;
|
|
size_t cache_replylen;
|
|
/*
|
|
* Next node on the list, if there is a collision
|
|
*/
|
|
cache_ptr cache_next;
|
|
};
|
|
|
|
/*
|
|
* The entire cache
|
|
*/
|
|
struct cl_cache {
|
|
u_int uc_size; /* size of cache */
|
|
cache_ptr *uc_entries; /* hash table of entries in cache */
|
|
cache_ptr *uc_fifo; /* fifo list of entries in cache */
|
|
u_int uc_nextvictim; /* points to next victim in fifo list */
|
|
rpcprog_t uc_prog; /* saved program number */
|
|
rpcvers_t uc_vers; /* saved version number */
|
|
rpcproc_t uc_proc; /* saved procedure number */
|
|
};
|
|
|
|
|
|
/*
|
|
* the hashing function
|
|
*/
|
|
#define CACHE_LOC(transp, xid) \
|
|
(xid % (SPARSENESS * ((struct cl_cache *) \
|
|
su_data(transp)->su_cache)->uc_size))
|
|
|
|
extern mutex_t dupreq_lock;
|
|
|
|
/*
|
|
* Enable use of the cache. Returns 1 on success, 0 on failure.
|
|
* Note: there is no disable.
|
|
*/
|
|
static const char cache_enable_str[] = "svc_enablecache: %s %s";
|
|
static const char alloc_err[] = "could not allocate cache ";
|
|
static const char enable_err[] = "cache already enabled";
|
|
|
|
int
|
|
svc_dg_enablecache(transp, size)
|
|
SVCXPRT *transp;
|
|
u_int size;
|
|
{
|
|
struct svc_dg_data *su = su_data(transp);
|
|
struct cl_cache *uc;
|
|
|
|
mutex_lock(&dupreq_lock);
|
|
if (su->su_cache != NULL) {
|
|
(void) warnx(cache_enable_str, enable_err, " ");
|
|
mutex_unlock(&dupreq_lock);
|
|
return (0);
|
|
}
|
|
uc = ALLOC(struct cl_cache, 1);
|
|
if (uc == NULL) {
|
|
warnx(cache_enable_str, alloc_err, " ");
|
|
mutex_unlock(&dupreq_lock);
|
|
return (0);
|
|
}
|
|
uc->uc_size = size;
|
|
uc->uc_nextvictim = 0;
|
|
uc->uc_entries = ALLOC(cache_ptr, size * SPARSENESS);
|
|
if (uc->uc_entries == NULL) {
|
|
warnx(cache_enable_str, alloc_err, "data");
|
|
FREE(uc, struct cl_cache, 1);
|
|
mutex_unlock(&dupreq_lock);
|
|
return (0);
|
|
}
|
|
MEMZERO(uc->uc_entries, cache_ptr, size * SPARSENESS);
|
|
uc->uc_fifo = ALLOC(cache_ptr, size);
|
|
if (uc->uc_fifo == NULL) {
|
|
warnx(cache_enable_str, alloc_err, "fifo");
|
|
FREE(uc->uc_entries, cache_ptr, size * SPARSENESS);
|
|
FREE(uc, struct cl_cache, 1);
|
|
mutex_unlock(&dupreq_lock);
|
|
return (0);
|
|
}
|
|
MEMZERO(uc->uc_fifo, cache_ptr, size);
|
|
su->su_cache = (char *)(void *)uc;
|
|
mutex_unlock(&dupreq_lock);
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Set an entry in the cache. It assumes that the uc entry is set from
|
|
* the earlier call to cache_get() for the same procedure. This will always
|
|
* happen because cache_get() is calle by svc_dg_recv and cache_set() is called
|
|
* by svc_dg_reply(). All this hoopla because the right RPC parameters are
|
|
* not available at svc_dg_reply time.
|
|
*/
|
|
|
|
static const char cache_set_str[] = "cache_set: %s";
|
|
static const char cache_set_err1[] = "victim not found";
|
|
static const char cache_set_err2[] = "victim alloc failed";
|
|
static const char cache_set_err3[] = "could not allocate new rpc buffer";
|
|
|
|
static void
|
|
cache_set(xprt, replylen)
|
|
SVCXPRT *xprt;
|
|
size_t replylen;
|
|
{
|
|
cache_ptr victim;
|
|
cache_ptr *vicp;
|
|
struct svc_dg_data *su = su_data(xprt);
|
|
struct cl_cache *uc = (struct cl_cache *) su->su_cache;
|
|
u_int loc;
|
|
char *newbuf;
|
|
#ifdef RPC_CACHE_DEBUG
|
|
struct netconfig *nconf;
|
|
char *uaddr;
|
|
#endif
|
|
|
|
mutex_lock(&dupreq_lock);
|
|
/*
|
|
* Find space for the new entry, either by
|
|
* reusing an old entry, or by mallocing a new one
|
|
*/
|
|
victim = uc->uc_fifo[uc->uc_nextvictim];
|
|
if (victim != NULL) {
|
|
loc = CACHE_LOC(xprt, victim->cache_xid);
|
|
for (vicp = &uc->uc_entries[loc];
|
|
*vicp != NULL && *vicp != victim;
|
|
vicp = &(*vicp)->cache_next)
|
|
;
|
|
if (*vicp == NULL) {
|
|
warnx(cache_set_str, cache_set_err1);
|
|
mutex_unlock(&dupreq_lock);
|
|
return;
|
|
}
|
|
*vicp = victim->cache_next; /* remove from cache */
|
|
newbuf = victim->cache_reply;
|
|
} else {
|
|
victim = ALLOC(struct cache_node, 1);
|
|
if (victim == NULL) {
|
|
warnx(cache_set_str, cache_set_err2);
|
|
mutex_unlock(&dupreq_lock);
|
|
return;
|
|
}
|
|
newbuf = mem_alloc(su->su_iosz);
|
|
if (newbuf == NULL) {
|
|
warnx(cache_set_str, cache_set_err3);
|
|
FREE(victim, struct cache_node, 1);
|
|
mutex_unlock(&dupreq_lock);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Store it away
|
|
*/
|
|
#ifdef RPC_CACHE_DEBUG
|
|
if (nconf = getnetconfigent(xprt->xp_netid)) {
|
|
uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
|
|
freenetconfigent(nconf);
|
|
printf(
|
|
"cache set for xid= %x prog=%d vers=%d proc=%d for rmtaddr=%s\n",
|
|
su->su_xid, uc->uc_prog, uc->uc_vers,
|
|
uc->uc_proc, uaddr);
|
|
free(uaddr);
|
|
}
|
|
#endif
|
|
victim->cache_replylen = replylen;
|
|
victim->cache_reply = rpc_buffer(xprt);
|
|
rpc_buffer(xprt) = newbuf;
|
|
xdrmem_create(&(su->su_xdrs), rpc_buffer(xprt),
|
|
su->su_iosz, XDR_ENCODE);
|
|
victim->cache_xid = su->su_xid;
|
|
victim->cache_proc = uc->uc_proc;
|
|
victim->cache_vers = uc->uc_vers;
|
|
victim->cache_prog = uc->uc_prog;
|
|
victim->cache_addr = xprt->xp_rtaddr;
|
|
victim->cache_addr.buf = ALLOC(char, xprt->xp_rtaddr.len);
|
|
(void) memcpy(victim->cache_addr.buf, xprt->xp_rtaddr.buf,
|
|
(size_t)xprt->xp_rtaddr.len);
|
|
loc = CACHE_LOC(xprt, victim->cache_xid);
|
|
victim->cache_next = uc->uc_entries[loc];
|
|
uc->uc_entries[loc] = victim;
|
|
uc->uc_fifo[uc->uc_nextvictim++] = victim;
|
|
uc->uc_nextvictim %= uc->uc_size;
|
|
mutex_unlock(&dupreq_lock);
|
|
}
|
|
|
|
/*
|
|
* Try to get an entry from the cache
|
|
* return 1 if found, 0 if not found and set the stage for cache_set()
|
|
*/
|
|
static int
|
|
cache_get(xprt, msg, replyp, replylenp)
|
|
SVCXPRT *xprt;
|
|
struct rpc_msg *msg;
|
|
char **replyp;
|
|
size_t *replylenp;
|
|
{
|
|
u_int loc;
|
|
cache_ptr ent;
|
|
struct svc_dg_data *su = su_data(xprt);
|
|
struct cl_cache *uc = (struct cl_cache *) su->su_cache;
|
|
#ifdef RPC_CACHE_DEBUG
|
|
struct netconfig *nconf;
|
|
char *uaddr;
|
|
#endif
|
|
|
|
mutex_lock(&dupreq_lock);
|
|
loc = CACHE_LOC(xprt, su->su_xid);
|
|
for (ent = uc->uc_entries[loc]; ent != NULL; ent = ent->cache_next) {
|
|
if (ent->cache_xid == su->su_xid &&
|
|
ent->cache_proc == msg->rm_call.cb_proc &&
|
|
ent->cache_vers == msg->rm_call.cb_vers &&
|
|
ent->cache_prog == msg->rm_call.cb_prog &&
|
|
ent->cache_addr.len == xprt->xp_rtaddr.len &&
|
|
(memcmp(ent->cache_addr.buf, xprt->xp_rtaddr.buf,
|
|
xprt->xp_rtaddr.len) == 0)) {
|
|
#ifdef RPC_CACHE_DEBUG
|
|
if (nconf = getnetconfigent(xprt->xp_netid)) {
|
|
uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
|
|
freenetconfigent(nconf);
|
|
printf(
|
|
"cache entry found for xid=%x prog=%d vers=%d proc=%d for rmtaddr=%s\n",
|
|
su->su_xid, msg->rm_call.cb_prog,
|
|
msg->rm_call.cb_vers,
|
|
msg->rm_call.cb_proc, uaddr);
|
|
free(uaddr);
|
|
}
|
|
#endif
|
|
*replyp = ent->cache_reply;
|
|
*replylenp = ent->cache_replylen;
|
|
mutex_unlock(&dupreq_lock);
|
|
return (1);
|
|
}
|
|
}
|
|
/*
|
|
* Failed to find entry
|
|
* Remember a few things so we can do a set later
|
|
*/
|
|
uc->uc_proc = msg->rm_call.cb_proc;
|
|
uc->uc_vers = msg->rm_call.cb_vers;
|
|
uc->uc_prog = msg->rm_call.cb_prog;
|
|
mutex_unlock(&dupreq_lock);
|
|
return (0);
|
|
}
|