5066c83435
definitions. Requested by: wollman
701 lines
16 KiB
C
701 lines
16 KiB
C
/* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */
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/* $FreeBSD$ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC";
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#endif
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/*
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* svc_vc.c, Server side for Connection Oriented based RPC.
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*
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* Actually implements two flavors of transporter -
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* a tcp rendezvouser (a listner and connection establisher)
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* and a record/tcp stream.
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*/
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#include "reentrant.h"
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/poll.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/uio.h>
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#include <netinet/in.h>
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#include <netinet/tcp.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <rpc/rpc.h>
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#include "rpc_com.h"
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#include "un-namespace.h"
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struct cmessage {
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struct cmsghdr cmsg;
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struct cmsgcred cmcred;
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};
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static SVCXPRT *makefd_xprt __P((int, u_int, u_int));
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static bool_t rendezvous_request __P((SVCXPRT *, struct rpc_msg *));
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static enum xprt_stat rendezvous_stat __P((SVCXPRT *));
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static void svc_vc_destroy __P((SVCXPRT *));
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static int read_vc __P((caddr_t, caddr_t, int));
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static int write_vc __P((caddr_t, caddr_t, int));
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static enum xprt_stat svc_vc_stat __P((SVCXPRT *));
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static bool_t svc_vc_recv __P((SVCXPRT *, struct rpc_msg *));
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static bool_t svc_vc_getargs __P((SVCXPRT *, xdrproc_t, caddr_t));
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static bool_t svc_vc_freeargs __P((SVCXPRT *, xdrproc_t, caddr_t));
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static bool_t svc_vc_reply __P((SVCXPRT *, struct rpc_msg *));
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static void svc_vc_rendezvous_ops __P((SVCXPRT *));
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static void svc_vc_ops __P((SVCXPRT *));
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static bool_t svc_vc_control __P((SVCXPRT *xprt, const u_int rq, void *in));
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static int __msgread_withcred(int, void *, size_t, struct cmessage *);
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static int __msgwrite(int, void *, size_t);
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struct cf_rendezvous { /* kept in xprt->xp_p1 for rendezvouser */
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u_int sendsize;
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u_int recvsize;
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};
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struct cf_conn { /* kept in xprt->xp_p1 for actual connection */
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enum xprt_stat strm_stat;
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u_int32_t x_id;
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XDR xdrs;
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char verf_body[MAX_AUTH_BYTES];
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};
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/*
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* Usage:
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* xprt = svc_vc_create(sock, send_buf_size, recv_buf_size);
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*
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* Creates, registers, and returns a (rpc) tcp based transporter.
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* Once *xprt is initialized, it is registered as a transporter
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* see (svc.h, xprt_register). This routine returns
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* a NULL if a problem occurred.
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*
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* The filedescriptor passed in is expected to refer to a bound, but
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* not yet connected socket.
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*
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* Since streams do buffered io similar to stdio, the caller can specify
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* how big the send and receive buffers are via the second and third parms;
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* 0 => use the system default.
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*/
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SVCXPRT *
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svc_vc_create(fd, sendsize, recvsize)
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int fd;
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u_int sendsize;
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u_int recvsize;
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{
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SVCXPRT *xprt;
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struct cf_rendezvous *r = NULL;
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struct __rpc_sockinfo si;
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struct sockaddr_storage sslocal;
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socklen_t slen;
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int one = 1;
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r = mem_alloc(sizeof(*r));
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if (r == NULL) {
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warnx("svc_vc_create: out of memory");
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goto cleanup_svc_vc_create;
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}
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if (!__rpc_fd2sockinfo(fd, &si))
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return NULL;
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r->sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
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r->recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
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xprt = mem_alloc(sizeof(SVCXPRT));
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if (xprt == NULL) {
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warnx("svc_vc_create: out of memory");
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goto cleanup_svc_vc_create;
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}
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xprt->xp_tp = NULL;
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xprt->xp_p1 = (caddr_t)(void *)r;
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xprt->xp_p2 = NULL;
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xprt->xp_p3 = NULL;
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xprt->xp_verf = _null_auth;
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svc_vc_rendezvous_ops(xprt);
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xprt->xp_port = (u_short)-1; /* It is the rendezvouser */
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xprt->xp_fd = fd;
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slen = sizeof (struct sockaddr_storage);
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if (_getsockname(fd, (struct sockaddr *)(void *)&sslocal, &slen) < 0) {
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warnx("svc_vc_create: could not retrieve local addr");
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goto cleanup_svc_vc_create;
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}
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xprt->xp_ltaddr.maxlen = xprt->xp_ltaddr.len = sslocal.ss_len;
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xprt->xp_ltaddr.buf = mem_alloc((size_t)sslocal.ss_len);
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if (xprt->xp_ltaddr.buf == NULL) {
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warnx("svc_vc_create: no mem for local addr");
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goto cleanup_svc_vc_create;
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}
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memcpy(xprt->xp_ltaddr.buf, &sslocal, (size_t)sslocal.ss_len);
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xprt->xp_rtaddr.maxlen = sizeof (struct sockaddr_storage);
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xprt_register(xprt);
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return (xprt);
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cleanup_svc_vc_create:
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if (r != NULL)
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mem_free(r, sizeof(*r));
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return (NULL);
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}
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/*
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* Like svtcp_create(), except the routine takes any *open* UNIX file
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* descriptor as its first input.
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*/
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SVCXPRT *
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svc_fd_create(fd, sendsize, recvsize)
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int fd;
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u_int sendsize;
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u_int recvsize;
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{
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struct sockaddr_storage ss;
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socklen_t slen;
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SVCXPRT *ret;
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assert(fd != -1);
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ret = makefd_xprt(fd, sendsize, recvsize);
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if (ret == NULL)
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return NULL;
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slen = sizeof (struct sockaddr_storage);
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if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
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warnx("svc_fd_create: could not retrieve local addr");
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goto freedata;
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}
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ret->xp_ltaddr.maxlen = ret->xp_ltaddr.len = ss.ss_len;
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ret->xp_ltaddr.buf = mem_alloc((size_t)ss.ss_len);
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if (ret->xp_ltaddr.buf == NULL) {
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warnx("svc_fd_create: no mem for local addr");
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goto freedata;
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}
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memcpy(ret->xp_ltaddr.buf, &ss, (size_t)ss.ss_len);
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slen = sizeof (struct sockaddr_storage);
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if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) {
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warnx("svc_fd_create: could not retrieve remote addr");
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goto freedata;
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}
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ret->xp_rtaddr.maxlen = ret->xp_rtaddr.len = ss.ss_len;
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ret->xp_rtaddr.buf = mem_alloc((size_t)ss.ss_len);
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if (ret->xp_rtaddr.buf == NULL) {
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warnx("svc_fd_create: no mem for local addr");
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goto freedata;
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}
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memcpy(ret->xp_rtaddr.buf, &ss, (size_t)ss.ss_len);
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#ifdef PORTMAP
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if (ss.ss_family == AF_INET) {
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ret->xp_raddr = *(struct sockaddr_in *)ret->xp_rtaddr.buf;
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ret->xp_addrlen = sizeof (struct sockaddr_in);
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}
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#endif /* PORTMAP */
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return ret;
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freedata:
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if (ret->xp_ltaddr.buf != NULL)
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mem_free(ret->xp_ltaddr.buf, rep->xp_ltaddr.maxlen);
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return NULL;
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}
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static SVCXPRT *
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makefd_xprt(fd, sendsize, recvsize)
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int fd;
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u_int sendsize;
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u_int recvsize;
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{
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SVCXPRT *xprt;
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struct cf_conn *cd;
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const char *netid;
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struct __rpc_sockinfo si;
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assert(fd != -1);
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xprt = mem_alloc(sizeof(SVCXPRT));
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if (xprt == NULL) {
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warnx("svc_vc: makefd_xprt: out of memory");
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goto done;
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}
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memset(xprt, 0, sizeof *xprt);
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cd = mem_alloc(sizeof(struct cf_conn));
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if (cd == NULL) {
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warnx("svc_tcp: makefd_xprt: out of memory");
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mem_free(xprt, sizeof(SVCXPRT));
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xprt = NULL;
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goto done;
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}
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cd->strm_stat = XPRT_IDLE;
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xdrrec_create(&(cd->xdrs), sendsize, recvsize,
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(caddr_t)(void *)xprt, read_vc, write_vc);
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xprt->xp_p1 = (caddr_t)(void *)cd;
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xprt->xp_verf.oa_base = cd->verf_body;
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svc_vc_ops(xprt); /* truely deals with calls */
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xprt->xp_port = 0; /* this is a connection, not a rendezvouser */
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xprt->xp_fd = fd;
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if (__rpc_fd2sockinfo(fd, &si) && __rpc_sockinfo2netid(&si, &netid))
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xprt->xp_netid = strdup(netid);
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xprt_register(xprt);
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done:
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return (xprt);
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}
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/*ARGSUSED*/
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static bool_t
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rendezvous_request(xprt, msg)
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SVCXPRT *xprt;
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struct rpc_msg *msg;
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{
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int sock;
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struct cf_rendezvous *r;
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struct sockaddr_storage addr;
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socklen_t len;
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struct __rpc_sockinfo si;
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assert(xprt != NULL);
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assert(msg != NULL);
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r = (struct cf_rendezvous *)xprt->xp_p1;
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again:
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len = sizeof addr;
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if ((sock = _accept(xprt->xp_fd, (struct sockaddr *)(void *)&addr,
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&len)) < 0) {
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if (errno == EINTR)
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goto again;
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return (FALSE);
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}
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/*
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* make a new transporter (re-uses xprt)
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*/
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xprt = makefd_xprt(sock, r->sendsize, r->recvsize);
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xprt->xp_rtaddr.buf = mem_alloc(len);
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if (xprt->xp_rtaddr.buf == NULL)
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return (FALSE);
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memcpy(xprt->xp_rtaddr.buf, &addr, len);
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xprt->xp_rtaddr.len = len;
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#ifdef PORTMAP
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if (addr.ss_family == AF_INET) {
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xprt->xp_raddr = *(struct sockaddr_in *)xprt->xp_rtaddr.buf;
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xprt->xp_addrlen = sizeof (struct sockaddr_in);
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}
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#endif /* PORTMAP */
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if (__rpc_fd2sockinfo(sock, &si) && si.si_proto == IPPROTO_TCP) {
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len = 1;
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/* XXX fvdl - is this useful? */
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_setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &len, sizeof (len));
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}
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return (FALSE); /* there is never an rpc msg to be processed */
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}
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/*ARGSUSED*/
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static enum xprt_stat
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rendezvous_stat(xprt)
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SVCXPRT *xprt;
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{
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return (XPRT_IDLE);
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}
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static void
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svc_vc_destroy(xprt)
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SVCXPRT *xprt;
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{
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struct cf_conn *cd;
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struct cf_rendezvous *r;
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assert(xprt != NULL);
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cd = (struct cf_conn *)xprt->xp_p1;
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xprt_unregister(xprt);
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if (xprt->xp_fd != RPC_ANYFD)
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(void)_close(xprt->xp_fd);
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if (xprt->xp_port != 0) {
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/* a rendezvouser socket */
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r = (struct cf_rendezvous *)xprt->xp_p1;
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mem_free(r, sizeof (struct cf_rendezvous));
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xprt->xp_port = 0;
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} else {
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/* an actual connection socket */
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XDR_DESTROY(&(cd->xdrs));
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mem_free(cd, sizeof(struct cf_conn));
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}
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if (xprt->xp_rtaddr.buf)
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mem_free(xprt->xp_rtaddr.buf, xprt->xp_rtaddr.maxlen);
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if (xprt->xp_ltaddr.buf)
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mem_free(xprt->xp_ltaddr.buf, xprt->xp_ltaddr.maxlen);
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if (xprt->xp_tp)
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free(xprt->xp_tp);
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if (xprt->xp_netid)
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free(xprt->xp_netid);
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mem_free(xprt, sizeof(SVCXPRT));
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}
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/*ARGSUSED*/
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static bool_t
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svc_vc_control(xprt, rq, in)
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SVCXPRT *xprt;
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const u_int rq;
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void *in;
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{
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return (FALSE);
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}
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/*
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* reads data from the tcp or uip connection.
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* any error is fatal and the connection is closed.
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* (And a read of zero bytes is a half closed stream => error.)
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* All read operations timeout after 35 seconds. A timeout is
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* fatal for the connection.
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*/
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static int
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read_vc(xprtp, buf, len)
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caddr_t xprtp;
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caddr_t buf;
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int len;
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{
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SVCXPRT *xprt;
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int sock;
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int milliseconds = 35 * 1000;
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struct pollfd pollfd;
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struct sockaddr *sa;
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struct cmessage *cm;
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struct cmsghdr *cmp;
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struct sockcred *sc;
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xprt = (SVCXPRT *)(void *)xprtp;
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assert(xprt != NULL);
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sock = xprt->xp_fd;
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do {
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pollfd.fd = sock;
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pollfd.events = POLLIN;
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pollfd.revents = 0;
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switch (_poll(&pollfd, 1, milliseconds)) {
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case -1:
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if (errno == EINTR)
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continue;
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/*FALLTHROUGH*/
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case 0:
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goto fatal_err;
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default:
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break;
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}
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} while ((pollfd.revents & POLLIN) == 0);
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sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
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if (sa->sa_family == AF_LOCAL) {
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cm = (struct cmessage *)xprt->xp_verf.oa_base;
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if ((len = __msgread_withcred(sock, buf, len, cm)) > 0) {
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cmp = &cm->cmsg;
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sc = (struct sockcred *)(void *)CMSG_DATA(cmp);
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xprt->xp_p2 = sc;
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return (len);
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}
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} else {
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if ((len = _read(sock, buf, (size_t)len)) > 0)
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return (len);
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}
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fatal_err:
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((struct cf_conn *)(xprt->xp_p1))->strm_stat = XPRT_DIED;
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return (-1);
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}
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/*
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* writes data to the tcp connection.
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* Any error is fatal and the connection is closed.
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*/
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static int
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write_vc(xprtp, buf, len)
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caddr_t xprtp;
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caddr_t buf;
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int len;
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{
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SVCXPRT *xprt;
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int i, cnt;
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struct sockaddr *sa;
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xprt = (SVCXPRT *)(void *)xprtp;
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assert(xprt != NULL);
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sa = (struct sockaddr *)xprt->xp_rtaddr.buf;
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if (sa->sa_family == AF_LOCAL) {
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for (cnt = len; cnt > 0; cnt -= i, buf += i) {
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if ((i = __msgwrite(xprt->xp_fd, buf,
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(size_t)cnt)) < 0) {
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((struct cf_conn *)(xprt->xp_p1))->strm_stat =
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XPRT_DIED;
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return (-1);
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}
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}
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} else {
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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;
|
|
|
|
bzero(cmp, sizeof(*cmp));
|
|
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 = cmp;
|
|
msg.msg_controllen = sizeof(struct cmessage);
|
|
msg.msg_flags = 0;
|
|
|
|
return(_recvmsg(sock, &msg, 0));
|
|
}
|
|
|
|
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);
|
|
}
|