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-rw-r--r--src/svc_dg.c721
1 files changed, 721 insertions, 0 deletions
diff --git a/src/svc_dg.c b/src/svc_dg.c
new file mode 100644
index 0000000..a9f63ff
--- /dev/null
+++ b/src/svc_dg.c
@@ -0,0 +1,721 @@
+
+/*
+ * Copyright (c) 2009, Sun Microsystems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * - Neither the name of Sun Microsystems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 1986-1991 by Sun Microsystems Inc.
+ */
+
+
+/*
+ * svc_dg.c, Server side for connectionless RPC.
+ *
+ * Does some caching in the hopes of achieving execute-at-most-once semantics.
+ */
+#include <pthread.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>
+#include <netconfig.h>
+#include <err.h>
+
+#include "rpc_com.h"
+#include "debug.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);
+static void svc_dg_enable_pktinfo(int, const struct __rpc_sockinfo *);
+static int svc_dg_valid_pktinfo(struct msghdr *);
+
+/*
+ * 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;
+ SVCXPRT_EXT *ext = NULL;
+ 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));
+
+ ext = mem_alloc(sizeof (*ext));
+ if (ext == NULL)
+ goto freedata;
+ memset(ext, 0, sizeof (*ext));
+
+ 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_p3 = ext;
+ 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;
+ __rpc_set_netbuf(&xprt->xp_ltaddr, &ss, slen);
+
+ /* Enable reception of IP*_PKTINFO control msgs */
+ svc_dg_enable_pktinfo(fd, &si);
+
+ xprt_register(xprt);
+ return (xprt);
+freedata:
+ (void) warnx(svc_dg_str, __no_mem_str);
+ if (xprt) {
+ if (su)
+ (void) mem_free(su, sizeof (*su));
+ if (ext)
+ (void) mem_free(ext, sizeof (*ext));
+ (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;
+ struct msghdr *mesgp;
+ struct iovec iov;
+ size_t replylen;
+ ssize_t rlen;
+
+again:
+ iov.iov_base = rpc_buffer(xprt);
+ iov.iov_len = su->su_iosz;
+ mesgp = &su->su_msghdr;
+ memset(mesgp, 0, sizeof(*mesgp));
+ mesgp->msg_iov = &iov;
+ mesgp->msg_iovlen = 1;
+ mesgp->msg_name = (struct sockaddr *)(void *) &ss;
+ mesgp->msg_namelen = sizeof (struct sockaddr_storage);
+ mesgp->msg_control = su->su_cmsg;
+ mesgp->msg_controllen = sizeof(su->su_cmsg);
+
+ rlen = recvmsg(xprt->xp_fd, mesgp, 0);
+ if (rlen == -1 && errno == EINTR)
+ goto again;
+ if (rlen == -1 || (rlen < (ssize_t)(4 * sizeof (u_int32_t))))
+ return (FALSE);
+ __rpc_set_netbuf(&xprt->xp_rtaddr, &ss, mesgp->msg_namelen);
+
+ /* Check whether there's an IP_PKTINFO or IP6_PKTINFO control message.
+ * If yes, preserve it for svc_dg_reply; otherwise just zap any cmsgs */
+ if (!svc_dg_valid_pktinfo(mesgp)) {
+ mesgp->msg_control = NULL;
+ mesgp->msg_controllen = 0;
+ }
+
+ __xprt_set_raddr(xprt, &ss);
+ 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)) {
+ iov.iov_base = reply;
+ iov.iov_len = replylen;
+ (void) sendmsg(xprt->xp_fd, mesgp, 0);
+ 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;
+
+ xdrproc_t xdr_results;
+ caddr_t xdr_location;
+ bool_t has_args;
+
+ if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
+ msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
+ has_args = TRUE;
+ xdr_results = msg->acpted_rply.ar_results.proc;
+ xdr_location = msg->acpted_rply.ar_results.where;
+
+ msg->acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;
+ msg->acpted_rply.ar_results.where = NULL;
+ } else
+ has_args = FALSE;
+
+ xdrs->x_op = XDR_ENCODE;
+ XDR_SETPOS(xdrs, 0);
+ msg->rm_xid = su->su_xid;
+ if (xdr_replymsg(xdrs, msg) &&
+ (!has_args ||
+ SVCAUTH_WRAP(&SVC_XP_AUTH(xprt),
+ xdrs, xdr_results, xdr_location))) {
+ struct msghdr *msg = &su->su_msghdr;
+ struct iovec iov;
+
+ iov.iov_base = rpc_buffer(xprt);
+ iov.iov_len = slen = XDR_GETPOS(xdrs);
+ msg->msg_iov = &iov;
+ msg->msg_iovlen = 1;
+ msg->msg_name = (struct sockaddr *)(void *) xprt->xp_rtaddr.buf;
+ msg->msg_namelen = xprt->xp_rtaddr.len;
+ /* cmsg already set in svc_dg_recv */
+
+ if (sendmsg(xprt->xp_fd, msg, 0) == (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;
+{
+ if (!SVCAUTH_UNWRAP(&SVC_XP_AUTH(xprt),
+ &(su_data(xprt)->su_xdrs),
+ xdr_args, args_ptr)) {
+ return FALSE;
+ }
+ return TRUE;
+}
+
+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;
+{
+ SVCXPRT_EXT *ext = SVCEXT(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));
+ (void) mem_free(ext, sizeof (*ext));
+ 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);
+ if (xprt->xp_netid)
+ (void) free(xprt->xp_netid);
+ (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;
+ struct netconfig *nconf;
+ char *uaddr;
+
+ 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
+ */
+ if (libtirpc_debug_level > 3) {
+ if ((nconf = getnetconfigent(xprt->xp_netid))) {
+ uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
+ freenetconfigent(nconf);
+ LIBTIRPC_DEBUG(4,
+ ("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);
+ }
+ }
+ 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;
+ struct netconfig *nconf;
+ char *uaddr;
+
+ 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)) {
+ if (libtirpc_debug_level > 3) {
+ if ((nconf = getnetconfigent(xprt->xp_netid))) {
+ uaddr = taddr2uaddr(nconf, &xprt->xp_rtaddr);
+ freenetconfigent(nconf);
+ LIBTIRPC_DEBUG(4,
+ ("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);
+ }
+ }
+ *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);
+}
+
+/*
+ * Enable reception of PKTINFO control messages
+ */
+void
+svc_dg_enable_pktinfo(int fd, const struct __rpc_sockinfo *si)
+{
+ int val = 1;
+
+ switch (si->si_af) {
+ case AF_INET:
+ (void) setsockopt(fd, SOL_IP, IP_PKTINFO, &val, sizeof(val));
+ break;
+#ifdef INET6
+ case AF_INET6:
+ (void) setsockopt(fd, SOL_IPV6, IPV6_RECVPKTINFO, &val, sizeof(val));
+ break;
+#endif
+ }
+}
+
+/*
+ * When given a control message received from the socket
+ * layer, check whether it contains valid PKTINFO data matching
+ * the address family of the peer address.
+ */
+int
+svc_dg_valid_pktinfo(struct msghdr *msg)
+{
+ struct cmsghdr *cmsg;
+
+ if (!msg->msg_name)
+ return 0;
+
+ if (msg->msg_flags & MSG_CTRUNC)
+ return 0;
+
+ cmsg = CMSG_FIRSTHDR(msg);
+ if (cmsg == NULL || CMSG_NXTHDR(msg, cmsg) != NULL)
+ return 0;
+
+ switch (((struct sockaddr *) msg->msg_name)->sa_family) {
+ case AF_INET:
+ if (cmsg->cmsg_level != SOL_IP
+ || cmsg->cmsg_type != IP_PKTINFO
+ || cmsg->cmsg_len < CMSG_LEN(sizeof (struct in_pktinfo))) {
+ return 0;
+ } else {
+ struct in_pktinfo *pkti;
+
+ pkti = (struct in_pktinfo *) CMSG_DATA (cmsg);
+ pkti->ipi_ifindex = 0;
+ }
+ break;
+
+#ifdef INET6
+ case AF_INET6:
+ if (cmsg->cmsg_level != SOL_IPV6
+ || cmsg->cmsg_type != IPV6_PKTINFO
+ || cmsg->cmsg_len < CMSG_LEN(sizeof (struct in6_pktinfo))) {
+ return 0;
+ } else {
+ struct in6_pktinfo *pkti;
+
+ pkti = (struct in6_pktinfo *) CMSG_DATA (cmsg);
+ pkti->ipi6_ifindex = 0;
+ }
+ break;
+#endif
+
+ default:
+ return 0;
+ }
+
+ return 1;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 23:46:27 +0000