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Diffstat (limited to 'src/lib/rpc/clnt_udp.c')
-rw-r--r--src/lib/rpc/clnt_udp.c488
1 files changed, 488 insertions, 0 deletions
diff --git a/src/lib/rpc/clnt_udp.c b/src/lib/rpc/clnt_udp.c
new file mode 100644
index 000000000000..7a5191659dfd
--- /dev/null
+++ b/src/lib/rpc/clnt_udp.c
@@ -0,0 +1,488 @@
+/* @(#)clnt_udp.c 2.2 88/08/01 4.0 RPCSRC */
+/*
+ * Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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.
+ */
+#if !defined(lint) && defined(SCCSIDS)
+static char sccsid[] = "@(#)clnt_udp.c 1.39 87/08/11 Copyr 1984 Sun Micro";
+#endif
+
+/*
+ * clnt_udp.c, Implements a UDP/IP based, client side RPC.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <gssrpc/rpc.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#if defined(sun)
+#include <sys/filio.h>
+#endif
+#include <netdb.h>
+#include <errno.h>
+#include <string.h>
+#include <gssrpc/pmap_clnt.h>
+#include <port-sockets.h>
+#include <errno.h>
+
+#ifndef GETSOCKNAME_ARG3_TYPE
+#define GETSOCKNAME_ARG3_TYPE int
+#endif
+
+/*
+ * UDP bases client side rpc operations
+ */
+static enum clnt_stat clntudp_call(CLIENT *, rpcproc_t, xdrproc_t, void *,
+ xdrproc_t, void *, struct timeval);
+static void clntudp_abort(CLIENT *);
+static void clntudp_geterr(CLIENT *, struct rpc_err *);
+static bool_t clntudp_freeres(CLIENT *, xdrproc_t, void *);
+static bool_t clntudp_control(CLIENT *, int, void *);
+static void clntudp_destroy(CLIENT *);
+
+static struct clnt_ops udp_ops = {
+ clntudp_call,
+ clntudp_abort,
+ clntudp_geterr,
+ clntudp_freeres,
+ clntudp_destroy,
+ clntudp_control
+};
+
+/*
+ * Private data kept per client handle
+ */
+struct cu_data {
+ SOCKET cu_sock;
+ bool_t cu_closeit;
+ struct sockaddr_in cu_raddr;
+ int cu_rlen;
+ struct sockaddr_in cu_laddr;
+ GETSOCKNAME_ARG3_TYPE cu_llen;
+ struct timeval cu_wait;
+ struct timeval cu_total;
+ struct rpc_err cu_error;
+ XDR cu_outxdrs;
+ u_int cu_xdrpos;
+ u_int cu_sendsz;
+ char *cu_outbuf;
+ u_int cu_recvsz;
+ char cu_inbuf[1];
+};
+
+/*
+ * Create a UDP based client handle.
+ * If *sockp<0, *sockp is set to a newly created UPD socket.
+ * If raddr->sin_port is 0 a binder on the remote machine
+ * is consulted for the correct port number.
+ * NB: It is the clients responsibility to close *sockp.
+ * NB: The rpch->cl_auth is initialized to null authentication.
+ * Caller may wish to set this something more useful.
+ *
+ * wait is the amount of time used between retransmitting a call if
+ * no response has been heard; retransmition occurs until the actual
+ * rpc call times out.
+ *
+ * sendsz and recvsz are the maximum allowable packet sizes that can be
+ * sent and received.
+ */
+CLIENT *
+clntudp_bufcreate(
+ struct sockaddr_in *raddr,
+ rpcprog_t program,
+ rpcvers_t version,
+ struct timeval wait,
+ register int *sockp,
+ u_int sendsz,
+ u_int recvsz)
+{
+ CLIENT *cl;
+ register struct cu_data *cu = 0;
+ struct timeval now;
+ struct rpc_msg call_msg;
+
+ cl = (CLIENT *)mem_alloc(sizeof(CLIENT));
+ if (cl == NULL) {
+ (void) fprintf(stderr, "clntudp_create: out of memory\n");
+ rpc_createerr.cf_stat = RPC_SYSTEMERROR;
+ rpc_createerr.cf_error.re_errno = errno;
+ goto fooy;
+ }
+ sendsz = ((sendsz + 3) / 4) * 4;
+ recvsz = ((recvsz + 3) / 4) * 4;
+ cu = (struct cu_data *)mem_alloc(sizeof(*cu) + sendsz + recvsz);
+ if (cu == NULL) {
+ (void) fprintf(stderr, "clntudp_create: out of memory\n");
+ rpc_createerr.cf_stat = RPC_SYSTEMERROR;
+ rpc_createerr.cf_error.re_errno = errno;
+ goto fooy;
+ }
+ cu->cu_outbuf = &cu->cu_inbuf[recvsz];
+
+ (void)gettimeofday(&now, (struct timezone *)0);
+ if (raddr->sin_port == 0) {
+ u_short port;
+ if ((port =
+ pmap_getport(raddr, program, version, IPPROTO_UDP)) == 0) {
+ goto fooy;
+ }
+ raddr->sin_port = htons(port);
+ }
+ cl->cl_ops = &udp_ops;
+ cl->cl_private = (caddr_t)cu;
+ cu->cu_raddr = *raddr;
+ cu->cu_rlen = sizeof (cu->cu_raddr);
+ cu->cu_wait = wait;
+ cu->cu_total.tv_sec = -1;
+ cu->cu_total.tv_usec = -1;
+ cu->cu_sendsz = sendsz;
+ cu->cu_recvsz = recvsz;
+ call_msg.rm_xid = getpid() ^ now.tv_sec ^ now.tv_usec;
+ call_msg.rm_direction = CALL;
+ call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
+ call_msg.rm_call.cb_prog = program;
+ call_msg.rm_call.cb_vers = version;
+ xdrmem_create(&(cu->cu_outxdrs), cu->cu_outbuf,
+ sendsz, XDR_ENCODE);
+ if (! xdr_callhdr(&(cu->cu_outxdrs), &call_msg)) {
+ goto fooy;
+ }
+ cu->cu_xdrpos = XDR_GETPOS(&(cu->cu_outxdrs));
+ if (*sockp < 0) {
+ int dontblock = 1;
+
+ *sockp = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (*sockp < 0) {
+ rpc_createerr.cf_stat = RPC_SYSTEMERROR;
+ rpc_createerr.cf_error.re_errno = errno;
+ goto fooy;
+ }
+ /* attempt to bind to prov port */
+ (void)bindresvport_sa(*sockp, NULL);
+ /* the sockets rpc controls are non-blocking */
+ (void)ioctl(*sockp, FIONBIO, (char *) &dontblock);
+ cu->cu_closeit = TRUE;
+ } else {
+ cu->cu_closeit = FALSE;
+ }
+ if (connect(*sockp, (struct sockaddr *)raddr, sizeof(*raddr)) < 0)
+ goto fooy;
+ cu->cu_llen = sizeof(cu->cu_laddr);
+ if (getsockname(*sockp, (struct sockaddr *)&cu->cu_laddr, &cu->cu_llen) < 0)
+ goto fooy;
+
+ cu->cu_sock = *sockp;
+ cl->cl_auth = authnone_create();
+ return (cl);
+fooy:
+ if (cu)
+ mem_free((caddr_t)cu, sizeof(*cu) + sendsz + recvsz);
+ if (cl)
+ mem_free((caddr_t)cl, sizeof(CLIENT));
+ return ((CLIENT *)NULL);
+}
+
+CLIENT *
+clntudp_create(
+ struct sockaddr_in *raddr,
+ rpcprog_t program,
+ rpcvers_t version,
+ struct timeval wait,
+ register int *sockp)
+{
+
+ return(clntudp_bufcreate(raddr, program, version, wait, sockp,
+ UDPMSGSIZE, UDPMSGSIZE));
+}
+
+static enum clnt_stat
+clntudp_call(
+ register CLIENT *cl, /* client handle */
+ rpcproc_t proc, /* procedure number */
+ xdrproc_t xargs, /* xdr routine for args */
+ void * argsp, /* pointer to args */
+ xdrproc_t xresults, /* xdr routine for results */
+ void * resultsp, /* pointer to results */
+ struct timeval utimeout /* seconds to wait before
+ * giving up */
+ )
+{
+ register struct cu_data *cu = (struct cu_data *)cl->cl_private;
+ register XDR *xdrs;
+ register int outlen;
+ register ssize_t inlen;
+ GETSOCKNAME_ARG3_TYPE fromlen; /* Assumes recvfrom uses same type */
+#ifdef FD_SETSIZE
+ fd_set readfds;
+ fd_set mask;
+#else
+ int readfds;
+ register int mask;
+#endif /* def FD_SETSIZE */
+ struct sockaddr_in from;
+ struct rpc_msg reply_msg;
+ XDR reply_xdrs;
+ struct timeval time_waited, seltimeout;
+ bool_t ok;
+ int nrefreshes = 2; /* number of times to refresh cred */
+ struct timeval timeout;
+ long procl = proc;
+
+ if (cu->cu_total.tv_usec == -1) {
+ timeout = utimeout; /* use supplied timeout */
+ } else {
+ timeout = cu->cu_total; /* use default timeout */
+ }
+
+ time_waited.tv_sec = 0;
+ time_waited.tv_usec = 0;
+call_again:
+ xdrs = &(cu->cu_outxdrs);
+ xdrs->x_op = XDR_ENCODE;
+ XDR_SETPOS(xdrs, cu->cu_xdrpos);
+ /*
+ * the transaction is the first thing in the out buffer
+ */
+ (*(uint32_t *)(void *)(cu->cu_outbuf))++;
+ if ((! XDR_PUTLONG(xdrs, &procl)) ||
+ (! AUTH_MARSHALL(cl->cl_auth, xdrs)) ||
+ (! AUTH_WRAP(cl->cl_auth, xdrs, xargs, argsp)))
+ return (cu->cu_error.re_status = RPC_CANTENCODEARGS);
+ outlen = (int)XDR_GETPOS(xdrs);
+
+send_again:
+ if (send(cu->cu_sock, cu->cu_outbuf, (u_int)outlen, 0) != outlen) {
+ cu->cu_error.re_errno = errno;
+ return (cu->cu_error.re_status = RPC_CANTSEND);
+ }
+
+ /*
+ * Hack to provide rpc-based message passing
+ */
+ if (timeout.tv_sec == 0 && timeout.tv_usec == 0) {
+ return (cu->cu_error.re_status = RPC_TIMEDOUT);
+ }
+ /*
+ * sub-optimal code appears here because we have
+ * some clock time to spare while the packets are in flight.
+ * (We assume that this is actually only executed once.)
+ */
+ reply_msg.acpted_rply.ar_verf = gssrpc__null_auth;
+ reply_msg.acpted_rply.ar_results.where = NULL;
+ reply_msg.acpted_rply.ar_results.proc = xdr_void;
+#ifdef FD_SETSIZE
+ FD_ZERO(&mask);
+ FD_SET(cu->cu_sock, &mask);
+#else
+ mask = 1 << cu->cu_sock;
+#endif /* def FD_SETSIZE */
+ for (;;) {
+ readfds = mask;
+ seltimeout = cu->cu_wait;
+ switch (select(gssrpc__rpc_dtablesize(), &readfds, (fd_set *)NULL,
+ (fd_set *)NULL, &seltimeout)) {
+
+ case 0:
+ time_waited.tv_sec += cu->cu_wait.tv_sec;
+ time_waited.tv_usec += cu->cu_wait.tv_usec;
+ while (time_waited.tv_usec >= 1000000) {
+ time_waited.tv_sec++;
+ time_waited.tv_usec -= 1000000;
+ }
+ if ((time_waited.tv_sec < timeout.tv_sec) ||
+ ((time_waited.tv_sec == timeout.tv_sec) &&
+ (time_waited.tv_usec < timeout.tv_usec)))
+ goto send_again;
+ return (cu->cu_error.re_status = RPC_TIMEDOUT);
+
+ /*
+ * buggy in other cases because time_waited is not being
+ * updated.
+ */
+ case -1:
+ if (errno == EINTR)
+ continue;
+ cu->cu_error.re_errno = errno;
+ return (cu->cu_error.re_status = RPC_CANTRECV);
+ }
+ do {
+ fromlen = sizeof(struct sockaddr);
+ inlen = recvfrom(cu->cu_sock, cu->cu_inbuf,
+ cu->cu_recvsz, 0,
+ (struct sockaddr *)&from, &fromlen);
+ } while (inlen < 0 && errno == EINTR);
+ if (inlen < 0) {
+ if (errno == EWOULDBLOCK)
+ continue;
+ cu->cu_error.re_errno = errno;
+ return (cu->cu_error.re_status = RPC_CANTRECV);
+ }
+ if ((size_t)inlen < sizeof(uint32_t))
+ continue;
+ /* see if reply transaction id matches sent id */
+ if (*((uint32_t *)(void *)(cu->cu_inbuf)) !=
+ *((uint32_t *)(void *)(cu->cu_outbuf)))
+ continue;
+ /* we now assume we have the proper reply */
+ break;
+ }
+
+ /*
+ * now decode and validate the response
+ */
+ xdrmem_create(&reply_xdrs, cu->cu_inbuf, (u_int)inlen, XDR_DECODE);
+ ok = xdr_replymsg(&reply_xdrs, &reply_msg);
+ /* XDR_DESTROY(&reply_xdrs); save a few cycles on noop destroy */
+ if (ok) {
+ gssrpc__seterr_reply(&reply_msg, &(cu->cu_error));
+ if (cu->cu_error.re_status == RPC_SUCCESS) {
+ if (! AUTH_VALIDATE(cl->cl_auth,
+ &reply_msg.acpted_rply.ar_verf)) {
+ cu->cu_error.re_status = RPC_AUTHERROR;
+ cu->cu_error.re_why = AUTH_INVALIDRESP;
+ } else if (! AUTH_UNWRAP(cl->cl_auth, &reply_xdrs,
+ xresults, resultsp)) {
+ if (cu->cu_error.re_status == RPC_SUCCESS)
+ cu->cu_error.re_status = RPC_CANTDECODERES;
+ }
+ } /* end successful completion */
+ else {
+ /* maybe our credentials need to be refreshed ... */
+ if (nrefreshes > 0 &&
+ AUTH_REFRESH(cl->cl_auth, &reply_msg)) {
+ nrefreshes--;
+ goto call_again;
+ }
+ } /* end of unsuccessful completion */
+ /* free verifier */
+ if ((reply_msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
+ (reply_msg.acpted_rply.ar_verf.oa_base != NULL)) {
+ xdrs->x_op = XDR_FREE;
+ (void)xdr_opaque_auth(xdrs,
+ &(reply_msg.acpted_rply.ar_verf));
+ }
+ } /* end of valid reply message */
+ else {
+ /*
+ * It's possible for xdr_replymsg() to fail partway
+ * through its attempt to decode the result from the
+ * server. If this happens, it will leave the reply
+ * structure partially populated with dynamically
+ * allocated memory. (This can happen if someone uses
+ * clntudp_bufcreate() to create a CLIENT handle and
+ * specifies a receive buffer size that is too small.)
+ * This memory must be free()ed to avoid a leak.
+ */
+ enum xdr_op op = reply_xdrs.x_op;
+ reply_xdrs.x_op = XDR_FREE;
+ xdr_replymsg(&reply_xdrs, &reply_msg);
+ reply_xdrs.x_op = op;
+ cu->cu_error.re_status = RPC_CANTDECODERES;
+ }
+ return (cu->cu_error.re_status);
+}
+
+static void
+clntudp_geterr(
+ CLIENT *cl,
+ struct rpc_err *errp)
+{
+ register struct cu_data *cu = (struct cu_data *)cl->cl_private;
+
+ *errp = cu->cu_error;
+}
+
+
+static bool_t
+clntudp_freeres(
+ CLIENT *cl,
+ xdrproc_t xdr_res,
+ void *res_ptr)
+{
+ register struct cu_data *cu = (struct cu_data *)cl->cl_private;
+ register XDR *xdrs = &(cu->cu_outxdrs);
+
+ xdrs->x_op = XDR_FREE;
+ return ((*xdr_res)(xdrs, res_ptr));
+}
+
+
+/*ARGSUSED*/
+static void
+clntudp_abort(CLIENT *h)
+{
+}
+
+static bool_t
+clntudp_control(
+ CLIENT *cl,
+ int request,
+ void *info)
+{
+ register struct cu_data *cu = (struct cu_data *)cl->cl_private;
+
+ switch (request) {
+ case CLSET_TIMEOUT:
+ cu->cu_total = *(struct timeval *)info;
+ break;
+ case CLGET_TIMEOUT:
+ *(struct timeval *)info = cu->cu_total;
+ break;
+ case CLSET_RETRY_TIMEOUT:
+ cu->cu_wait = *(struct timeval *)info;
+ break;
+ case CLGET_RETRY_TIMEOUT:
+ *(struct timeval *)info = cu->cu_wait;
+ break;
+ case CLGET_SERVER_ADDR:
+ *(struct sockaddr_in *)info = cu->cu_raddr;
+ break;
+ case CLGET_LOCAL_ADDR:
+ *(struct sockaddr_in *)info = cu->cu_laddr;
+ break;
+ default:
+ return (FALSE);
+ }
+ return (TRUE);
+}
+
+static void
+clntudp_destroy(CLIENT *cl)
+{
+ register struct cu_data *cu = (struct cu_data *)cl->cl_private;
+
+ if (cu->cu_closeit)
+ (void)closesocket(cu->cu_sock);
+ XDR_DESTROY(&(cu->cu_outxdrs));
+ mem_free((caddr_t)cu, (sizeof(*cu) + cu->cu_sendsz + cu->cu_recvsz));
+ mem_free((caddr_t)cl, sizeof(CLIENT));
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-01 00:00:05 +0000