summaryrefslogtreecommitdiffstats
path: root/lib/libc/rpc/svc_vc.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/libc/rpc/svc_vc.c')
-rw-r--r--lib/libc/rpc/svc_vc.c705
1 files changed, 705 insertions, 0 deletions
diff --git a/lib/libc/rpc/svc_vc.c b/lib/libc/rpc/svc_vc.c
new file mode 100644
index 0000000..95b907a
--- /dev/null
+++ b/lib/libc/rpc/svc_vc.c
@@ -0,0 +1,705 @@
+/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
+/* $FreeBSD$ */
+
+/*
+ * 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
+ */
+
+#include <sys/cdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
+static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
+#endif
+
+/*
+ * svc_vc.c, Server side for Connection Oriented based RPC.
+ *
+ * Actually implements two flavors of transporter -
+ * a tcp rendezvouser (a listner and connection establisher)
+ * and a record/tcp stream.
+ */
+
+#include "namespace.h"
+#include "reentrant.h"
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/poll.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/uio.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rpc/rpc.h>
+
+#include "rpc_com.h"
+#include "un-namespace.h"
+
+struct cmessage {
+ struct cmsghdr cmsg;
+ struct cmsgcred cmcred;
+};
+
+static SVCXPRT *makefd_xprt __P((int, u_int, u_int));
+static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *));
+static enum xprt_stat rendezvous_stat __P((SVCXPRT *));
+static void svc_vc_destroy __P((SVCXPRT *));
+static int read_vc __P((caddr_t, caddr_t, int));
+static int write_vc __P((caddr_t, caddr_t, int));
+static enum xprt_stat svc_vc_stat __P((SVCXPRT *));
+static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *));
+static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t));
+static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t));
+static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *));
+static void svc_vc_rendezvous_ops __P((SVCXPRT *));
+static void svc_vc_ops __P((SVCXPRT *));
+static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in));
+static int __msgread_withcred(int, void *, size_t, struct cmessage *);
+static int __msgwrite(int, void *, size_t);
+
+struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
+ u_int sendsize;
+ u_int recvsize;
+};
+
+struct cf_conn { /* kept in xprt->xp_p1 for actual connection */
+ enum xprt_stat strm_stat;
+ u_int32_t x_id;
+ XDR xdrs;
+ char verf_body[MAX_AUTH_BYTES];
+};
+
+/*
+ * Usage:
+ * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
+ *
+ * Creates, registers, and returns a (rpc) tcp based transporter.
+ * Once *xprt is initialized, it is registered as a transporter
+ * see (svc.h, xprt_register). This routine returns
+ * a NULL if a problem occurred.
+ *
+ * The filedescriptor passed in is expected to refer to a bound, but
+ * not yet connected socket.
+ *
+ * Since streams do buffered io similar to stdio, the caller can specify
+ * how big the send and receive buffers are via the second and third parms;
+ * 0 => use the system default.
+ */
+SVCXPRT *
+svc_vc_create(fd, sendsize, recvsize)
+ int fd;
+ u_int sendsize;
+ u_int recvsize;
+{
+ SVCXPRT *xprt;
+ struct cf_rendezvous *r = NULL;
+ struct __rpc_sockinfo si;
+ struct sockaddr_storage sslocal;
+ socklen_t slen;
+ int one = 1;
+
+ r = mem_alloc(sizeof(*r));
+ if (r == NULL) {
+ warnx("svc_vc_create: out of memory");
+ goto cleanup_svc_vc_create;
+ }
+ if (!__rpc_fd2sockinfo(fd, &si))
+ return NULL;
+ r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
+ r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
+ xprt = mem_alloc(sizeof(SVCXPRT));
+ if (xprt == NULL) {
+ warnx("svc_vc_create: out of memory");
+ goto cleanup_svc_vc_create;
+ }
+ xprt->xp_tp = NULL;
+ xprt->xp_p1 = (caddr_t)(void *)r;
+ xprt->xp_p2 = NULL;
+ xprt->xp_p3 = NULL;
+ xprt->xp_verf = _null_auth;
+ svc_vc_rendezvous_ops(xprt);
+ xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
+ xprt->xp_fd = fd;
+
+ slen = sizeof (struct sockaddr_storage);
+ if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
+ warnx("svc_vc_create: could not retrieve local addr");
+ goto cleanup_svc_vc_create;
+ }
+
+ xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
+ xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
+ if (xprt->xp_ltaddr.buf == NULL) {
+ warnx("svc_vc_create: no mem for local addr");
+ goto cleanup_svc_vc_create;
+ }
+ memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
+
+ xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
+ xprt_register(xprt);
+ return (xprt);
+cleanup_svc_vc_create:
+ if (r != NULL)
+ mem_free(r, sizeof(*r));
+ return (NULL);
+}
+
+/*
+ * Like svtcp_create(), except the routine takes any *open* UNIX file
+ * descriptor as its first input.
+ */
+SVCXPRT *
+svc_fd_create(fd, sendsize, recvsize)
+ int fd;
+ u_int sendsize;
+ u_int recvsize;
+{
+ struct sockaddr_storage ss;
+ socklen_t slen;
+ SVCXPRT *ret;
+
+ assert(fd != -1);
+
+ ret = makefd_xprt(fd, sendsize, recvsize);
+ if (ret == NULL)
+ return NULL;
+
+ slen = sizeof (struct sockaddr_storage);
+ if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
+ warnx("svc_fd_create: could not retrieve local addr");
+ goto freedata;
+ }
+ ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
+ ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
+ if (ret->xp_ltaddr.buf == NULL) {
+ warnx("svc_fd_create: no mem for local addr");
+ goto freedata;
+ }
+ memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
+
+ slen = sizeof (struct sockaddr_storage);
+ if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
+ warnx("svc_fd_create: could not retrieve remote addr");
+ goto freedata;
+ }
+ ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
+ ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
+ if (ret->xp_rtaddr.buf == NULL) {
+ warnx("svc_fd_create: no mem for local addr");
+ goto freedata;
+ }
+ memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
+#ifdef PORTMAP
+ if (ss.ss_family == AF_INET) {
+ ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
+ ret->xp_addrlen = sizeof (struct sockaddr_in);
+ }
+#endif /* PORTMAP */
+
+ return ret;
+
+freedata:
+ if (ret->xp_ltaddr.buf != NULL)
+ mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
+
+ return NULL;
+}
+
+static SVCXPRT *
+makefd_xprt(fd, sendsize, recvsize)
+ int fd;
+ u_int sendsize;
+ u_int recvsize;
+{
+ SVCXPRT *xprt;
+ struct cf_conn *cd;
+ const char *netid;
+ struct __rpc_sockinfo si;
+
+ assert(fd != -1);
+
+ xprt = mem_alloc(sizeof(SVCXPRT));
+ if (xprt == NULL) {
+ warnx("svc_vc: makefd_xprt: out of memory");
+ goto done;
+ }
+ memset(xprt, 0, sizeof *xprt);
+ cd = mem_alloc(sizeof(struct cf_conn));
+ if (cd == NULL) {
+ warnx("svc_tcp: makefd_xprt: out of memory");
+ mem_free(xprt, sizeof(SVCXPRT));
+ xprt = NULL;
+ goto done;
+ }
+ cd->strm_stat = XPRT_IDLE;
+ xdrrec_create(&(cd->xdrs), sendsize, recvsize,
+ (caddr_t)(void *)xprt, read_vc, write_vc);
+ xprt->xp_p1 = (caddr_t)(void *)cd;
+ xprt->xp_verf.oa_base = cd->verf_body;
+ svc_vc_ops(xprt); /* truely deals with calls */
+ xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
+ xprt->xp_fd = fd;
+ if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
+ xprt->xp_netid = strdup(netid);
+
+ xprt_register(xprt);
+done:
+ return (xprt);
+}
+
+/*ARGSUSED*/
+static bool_t
+rendezvous_request(xprt, msg)
+ SVCXPRT *xprt;
+ struct rpc_msg *msg;
+{
+ int sock;
+ struct cf_rendezvous *r;
+ struct sockaddr_storage addr;
+ socklen_t len;
+ struct __rpc_sockinfo si;
+
+ assert(xprt != NULL);
+ assert(msg != NULL);
+
+ r = (struct cf_rendezvous *)xprt->xp_p1;
+again:
+ len = sizeof addr;
+ if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
+ &len)) < 0) {
+ if (errno == EINTR)
+ goto again;
+ return (FALSE);
+ }
+ /*
+ * make a new transporter (re-uses xprt)
+ */
+ xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
+ xprt->xp_rtaddr.buf = mem_alloc(len);
+ if (xprt->xp_rtaddr.buf == NULL)
+ return (FALSE);
+ memcpy(xprt->xp_rtaddr.buf, &addr, len);
+ xprt->xp_rtaddr.len = len;
+#ifdef PORTMAP
+ if (addr.ss_family == AF_INET) {
+ xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
+ xprt->xp_addrlen = sizeof (struct sockaddr_in);
+ }
+#endif /* PORTMAP */
+ if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
+ len = 1;
+ /* XXX fvdl - is this useful? */
+ _setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
+ }
+ return (FALSE); /* there is never an rpc msg to be processed */
+}
+
+/*ARGSUSED*/
+static enum xprt_stat
+rendezvous_stat(xprt)
+ SVCXPRT *xprt;
+{
+
+ return (XPRT_IDLE);
+}
+
+static void
+svc_vc_destroy(xprt)
+ SVCXPRT *xprt;
+{
+ struct cf_conn *cd;
+ struct cf_rendezvous *r;
+
+ assert(xprt != NULL);
+
+ cd = (struct cf_conn *)xprt->xp_p1;
+
+ xprt_unregister(xprt);
+ if (xprt->xp_fd != RPC_ANYFD)
+ (void)_close(xprt->xp_fd);
+ if (xprt->xp_port != 0) {
+ /* a rendezvouser socket */
+ r = (struct cf_rendezvous *)xprt->xp_p1;
+ mem_free(r, sizeof (struct cf_rendezvous));
+ xprt->xp_port = 0;
+ } else {
+ /* an actual connection socket */
+ XDR_DESTROY(&(cd->xdrs));
+ mem_free(cd, sizeof(struct cf_conn));
+ }
+ if (xprt->xp_rtaddr.buf)
+ mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
+ if (xprt->xp_ltaddr.buf)
+ mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
+ if (xprt->xp_tp)
+ free(xprt->xp_tp);
+ if (xprt->xp_netid)
+ free(xprt->xp_netid);
+ mem_free(xprt, sizeof(SVCXPRT));
+}
+
+/*ARGSUSED*/
+static bool_t
+svc_vc_control(xprt, rq, in)
+ SVCXPRT *xprt;
+ const u_int rq;
+ void *in;
+{
+ return (FALSE);
+}
+
+/*
+ * reads data from the tcp or uip connection.
+ * any error is fatal and the connection is closed.
+ * (And a read of zero bytes is a half closed stream => error.)
+ * All read operations timeout after 35 seconds. A timeout is
+ * fatal for the connection.
+ */
+static int
+read_vc(xprtp, buf, len)
+ caddr_t xprtp;
+ caddr_t buf;
+ int len;
+{
+ SVCXPRT *xprt;
+ int sock;
+ int milliseconds = 35 * 1000;
+ struct pollfd pollfd;
+ struct sockaddr *sa;
+ struct cmessage *cm;
+
+ xprt = (SVCXPRT *)(void *)xprtp;
+ assert(xprt != NULL);
+
+ sock = xprt->xp_fd;
+
+ do {
+ pollfd.fd = sock;
+ pollfd.events = POLLIN;
+ pollfd.revents = 0;
+ switch (_poll(&pollfd, 1, milliseconds)) {
+ case -1:
+ if (errno == EINTR)
+ continue;
+ /*FALLTHROUGH*/
+ case 0:
+ goto fatal_err;
+
+ default:
+ break;
+ }
+ } while ((pollfd.revents & POLLIN) == 0);
+
+ sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
+ if (sa->sa_family == AF_LOCAL) {
+ cm = (struct cmessage *)xprt->xp_verf.oa_base;
+ if ((len = __msgread_withcred(sock, buf, len, cm)) > 0) {
+ xprt->xp_p2 = &cm->cmcred;
+ return (len);
+ }
+ } else {
+ if ((len = _read(sock, buf, (size_t)len)) > 0)
+ return (len);
+ }
+
+fatal_err:
+ ((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
+ return (-1);
+}
+
+/*
+ * writes data to the tcp connection.
+ * Any error is fatal and the connection is closed.
+ */
+static int
+write_vc(xprtp, buf, len)
+ caddr_t xprtp;
+ caddr_t buf;
+ int len;
+{
+ SVCXPRT *xprt;
+ int i, cnt;
+ struct sockaddr *sa;
+
+ xprt = (SVCXPRT *)(void *)xprtp;
+ assert(xprt != NULL);
+
+ sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
+ if (sa->sa_family == AF_LOCAL) {
+ for (cnt = len; cnt > 0; cnt -= i, buf += i) {
+ if ((i = __msgwrite(xprt->xp_fd, buf,
+ (size_t)cnt)) < 0) {
+ ((struct cf_conn *)(xprt->xp_p1))->strm_stat =
+ XPRT_DIED;
+ return (-1);
+ }
+ }
+ } else {
+ for (cnt = len; cnt > 0; cnt -= i, buf += i) {
+ if ((i = _write(xprt->xp_fd, buf,
+ (size_t)cnt)) < 0) {
+ ((struct cf_conn *)(xprt->xp_p1))->strm_stat =
+ XPRT_DIED;
+ return (-1);
+ }
+ }
+ }
+
+ return (len);
+}
+
+static enum xprt_stat
+svc_vc_stat(xprt)
+ SVCXPRT *xprt;
+{
+ struct cf_conn *cd;
+
+ assert(xprt != NULL);
+
+ cd = (struct cf_conn *)(xprt->xp_p1);
+
+ if (cd->strm_stat == XPRT_DIED)
+ return (XPRT_DIED);
+ if (! xdrrec_eof(&(cd->xdrs)))
+ return (XPRT_MOREREQS);
+ return (XPRT_IDLE);
+}
+
+static bool_t
+svc_vc_recv(xprt, msg)
+ SVCXPRT *xprt;
+ struct rpc_msg *msg;
+{
+ struct cf_conn *cd;
+ XDR *xdrs;
+
+ assert(xprt != NULL);
+ assert(msg != NULL);
+
+ cd = (struct cf_conn *)(xprt->xp_p1);
+ xdrs = &(cd->xdrs);
+
+ xdrs->x_op = XDR_DECODE;
+ (void)xdrrec_skiprecord(xdrs);
+ if (xdr_callmsg(xdrs, msg)) {
+ cd->x_id = msg->rm_xid;
+ return (TRUE);
+ }
+ cd->strm_stat = XPRT_DIED;
+ return (FALSE);
+}
+
+static bool_t
+svc_vc_getargs(xprt, xdr_args, args_ptr)
+ SVCXPRT *xprt;
+ xdrproc_t xdr_args;
+ caddr_t args_ptr;
+{
+
+ assert(xprt != NULL);
+ /* args_ptr may be NULL */
+ return ((*xdr_args)(&(((struct cf_conn *)(xprt->xp_p1))->xdrs),
+ args_ptr));
+}
+
+static bool_t
+svc_vc_freeargs(xprt, xdr_args, args_ptr)
+ SVCXPRT *xprt;
+ xdrproc_t xdr_args;
+ caddr_t args_ptr;
+{
+ XDR *xdrs;
+
+ assert(xprt != NULL);
+ /* args_ptr may be NULL */
+
+ xdrs = &(((struct cf_conn *)(xprt->xp_p1))->xdrs);
+
+ xdrs->x_op = XDR_FREE;
+ return ((*xdr_args)(xdrs, args_ptr));
+}
+
+static bool_t
+svc_vc_reply(xprt, msg)
+ SVCXPRT *xprt;
+ struct rpc_msg *msg;
+{
+ struct cf_conn *cd;
+ XDR *xdrs;
+ bool_t stat;
+
+ assert(xprt != NULL);
+ assert(msg != NULL);
+
+ cd = (struct cf_conn *)(xprt->xp_p1);
+ xdrs = &(cd->xdrs);
+
+ xdrs->x_op = XDR_ENCODE;
+ msg->rm_xid = cd->x_id;
+ stat = xdr_replymsg(xdrs, msg);
+ (void)xdrrec_endofrecord(xdrs, TRUE);
+ return (stat);
+}
+
+static void
+svc_vc_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, ops2 */
+
+ mutex_lock(&ops_lock);
+ if (ops.xp_recv == NULL) {
+ ops.xp_recv = svc_vc_recv;
+ ops.xp_stat = svc_vc_stat;
+ ops.xp_getargs = svc_vc_getargs;
+ ops.xp_reply = svc_vc_reply;
+ ops.xp_freeargs = svc_vc_freeargs;
+ ops.xp_destroy = svc_vc_destroy;
+ ops2.xp_control = svc_vc_control;
+ }
+ xprt->xp_ops = &ops;
+ xprt->xp_ops2 = &ops2;
+ mutex_unlock(&ops_lock);
+}
+
+static void
+svc_vc_rendezvous_ops(xprt)
+ SVCXPRT *xprt;
+{
+ static struct xp_ops ops;
+ static struct xp_ops2 ops2;
+ extern mutex_t ops_lock;
+
+ mutex_lock(&ops_lock);
+ if (ops.xp_recv == NULL) {
+ ops.xp_recv = rendezvous_request;
+ ops.xp_stat = rendezvous_stat;
+ ops.xp_getargs =
+ (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort;
+ ops.xp_reply =
+ (bool_t (*) __P((SVCXPRT *, struct rpc_msg *)))abort;
+ ops.xp_freeargs =
+ (bool_t (*) __P((SVCXPRT *, xdrproc_t, caddr_t)))abort,
+ ops.xp_destroy = svc_vc_destroy;
+ ops2.xp_control = svc_vc_control;
+ }
+ xprt->xp_ops = &ops;
+ xprt->xp_ops2 = &ops2;
+ mutex_unlock(&ops_lock);
+}
+
+int
+__msgread_withcred(sock, buf, cnt, cmp)
+ int sock;
+ void *buf;
+ size_t cnt;
+ struct cmessage *cmp;
+{
+ struct iovec iov[1];
+ struct msghdr msg;
+ union {
+ struct cmsghdr cmsg;
+ char control[CMSG_SPACE(sizeof(struct cmsgcred))];
+ } cm;
+ int ret;
+
+
+ bzero(&cm, sizeof(cm));
+ iov[0].iov_base = buf;
+ iov[0].iov_len = cnt;
+
+ msg.msg_iov = iov;
+ msg.msg_iovlen = 1;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_control = &cm;
+ msg.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred));
+ msg.msg_flags = 0;
+
+ ret = _recvmsg(sock, &msg, 0);
+ bcopy(&cm.cmsg, &cmp->cmsg, sizeof(cmp->cmsg));
+ bcopy(CMSG_DATA(&cm), &cmp->cmcred, sizeof(cmp->cmcred));
+ return ret;
+}
+
+static int
+__msgwrite(sock, buf, cnt)
+ int sock;
+ void *buf;
+ size_t cnt;
+{
+ struct iovec iov[1];
+ struct msghdr msg;
+ struct cmessage cm;
+
+ bzero((char *)&cm, sizeof(cm));
+ iov[0].iov_base = buf;
+ iov[0].iov_len = cnt;
+
+ cm.cmsg.cmsg_type = SCM_CREDS;
+ cm.cmsg.cmsg_level = SOL_SOCKET;
+ cm.cmsg.cmsg_len = sizeof(struct cmessage);
+
+ msg.msg_iov = iov;
+ msg.msg_iovlen = 1;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_control = (caddr_t)&cm;
+ msg.msg_controllen = sizeof(struct cmessage);
+ msg.msg_flags = 0;
+
+ return(_sendmsg(sock, &msg, 0));
+}
+
+/*
+ * Get the effective UID of the sending process. Used by rpcbind and keyserv
+ * (AF_LOCAL).
+ */
+int
+__rpc_get_local_uid(SVCXPRT *transp, uid_t *uid)
+{
+ struct cmsgcred *cmcred;
+
+ cmcred = __svc_getcallercreds(transp);
+ if (cmcred == NULL)
+ return(-1);
+ *uid = cmcred->cmcred_euid;
+ return(0);
+}
OpenPOWER on IntegriCloud