+++ /dev/null
-/*
- * 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
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: svc.c,v 1.11 1998/02/25 12:21:18 deraadt Exp $";
-#endif /* LIBC_SCCS and not lint */
-
-/*
- * svc.c, Server-side remote procedure call interface.
- *
- * There are two sets of procedures here. The xprt routines are
- * for handling transport handles. The svc routines handle the
- * list of service routines.
- *
- * Copyright (C) 1984, Sun Microsystems, Inc.
- */
-
-#include <stdlib.h>
-#include <string.h>
-
-#include <sys/param.h>
-#include <sys/errno.h>
-#include <rpc/rpc.h>
-#include <rpc/pmap_clnt.h>
-
-static SVCXPRT **xports;
-static int xportssize;
-
-#define NULL_SVC ((struct svc_callout *)0)
-#define RQCRED_SIZE 1024 /* this size is excessive */
-
-#define max(a, b) (a > b ? a : b)
-
-#if 0
-#ifdef __linux__
-#define fds_bits __fds_bits /* XXX - Linux sux */
-#endif
-#endif
-
-/*
- * The services list
- * Each entry represents a set of procedures (an rpc program).
- * The dispatch routine takes request structs and runs the
- * apropriate procedure.
- */
-static struct svc_callout {
- struct svc_callout *sc_next;
- u_long sc_prog;
- u_long sc_vers;
- void (*sc_dispatch)();
-} *svc_head;
-
-static struct svc_callout *svc_find();
-
-int __svc_fdsetsize;
-fd_set *__svc_fdset;
-
-/* *************** SVCXPRT related stuff **************** */
-
-/*
- * Activate a transport handle.
- */
-void
-xprt_register(xprt)
- SVCXPRT *xprt;
-{
- register int sock = xprt->xp_sock;
-
- if (sock+1 > __svc_fdsetsize) {
- int bytes = howmany(sock+1, NFDBITS) * sizeof(fd_mask);
- fd_set *fds;
-
- fds = (fd_set *)malloc(bytes);
- memset(fds, 0, bytes);
- if (__svc_fdset) {
- memcpy(fds, __svc_fdset, howmany(__svc_fdsetsize,
- NFDBITS) * sizeof(fd_mask));
- free(__svc_fdset);
- }
- __svc_fdset = fds;
- __svc_fdsetsize = sock+1;
- }
-
- if (sock < FD_SETSIZE)
- FD_SET(sock, &svc_fdset);
- FD_SET(sock, __svc_fdset);
-
- if (xports == NULL || sock+1 > xportssize) {
- SVCXPRT **xp;
- int size = FD_SETSIZE;
-
- if (sock+1 > size)
- size = sock+1;
- xp = (SVCXPRT **)mem_alloc(size * sizeof(SVCXPRT *));
- memset(xp, 0, size * sizeof(SVCXPRT *));
- if (xports) {
- memcpy(xp, xports, xportssize * sizeof(SVCXPRT *));
- free(xports);
- }
- xportssize = size;
- xports = xp;
- }
- xports[sock] = xprt;
- svc_maxfd = max(svc_maxfd, sock);
-}
-
-/*
- * De-activate a transport handle.
- */
-void
-xprt_unregister(xprt)
- SVCXPRT *xprt;
-{
- register int sock = xprt->xp_sock;
-
- if (xports[sock] == xprt) {
- xports[sock] = (SVCXPRT *)0;
- if (sock < FD_SETSIZE)
- FD_CLR(sock, &svc_fdset);
- FD_CLR(sock, __svc_fdset);
- if (sock == svc_maxfd) {
- for (svc_maxfd--; svc_maxfd>=0; svc_maxfd--)
- if (xports[svc_maxfd])
- break;
- }
- /*
- * XXX could use svc_maxfd as a hint to
- * decrease the size of __svc_fdset
- */
- }
-}
-
-
-/* ********************** CALLOUT list related stuff ************* */
-
-/*
- * Add a service program to the callout list.
- * The dispatch routine will be called when a rpc request for this
- * program number comes in.
- */
-bool_t
-svc_register(xprt, prog, vers, dispatch, protocol)
- SVCXPRT *xprt;
- u_long prog;
- u_long vers;
- void (*dispatch)();
- int protocol;
-{
- struct svc_callout *prev;
- register struct svc_callout *s;
-
- if ((s = svc_find(prog, vers, &prev)) != NULL_SVC) {
- if (s->sc_dispatch == dispatch)
- goto pmap_it; /* he is registering another xptr */
- return (FALSE);
- }
- s = (struct svc_callout *)mem_alloc(sizeof(struct svc_callout));
- if (s == (struct svc_callout *)0) {
- return (FALSE);
- }
- s->sc_prog = prog;
- s->sc_vers = vers;
- s->sc_dispatch = dispatch;
- s->sc_next = svc_head;
- svc_head = s;
-pmap_it:
- /* now register the information with the local binder service */
- if (protocol) {
- return (pmap_set(prog, vers, protocol, xprt->xp_port));
- }
- return (TRUE);
-}
-
-/*
- * Remove a service program from the callout list.
- */
-void
-svc_unregister(prog, vers)
- u_long prog;
- u_long vers;
-{
- struct svc_callout *prev;
- register struct svc_callout *s;
-
- if ((s = svc_find(prog, vers, &prev)) == NULL_SVC)
- return;
- if (prev == NULL_SVC) {
- svc_head = s->sc_next;
- } else {
- prev->sc_next = s->sc_next;
- }
- s->sc_next = NULL_SVC;
- mem_free((char *) s, (u_int) sizeof(struct svc_callout));
- /* now unregister the information with the local binder service */
- (void)pmap_unset(prog, vers);
-}
-
-/*
- * Search the callout list for a program number, return the callout
- * struct.
- */
-static struct svc_callout *
-svc_find(prog, vers, prev)
- u_long prog;
- u_long vers;
- struct svc_callout **prev;
-{
- register struct svc_callout *s, *p;
-
- p = NULL_SVC;
- for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
- if ((s->sc_prog == prog) && (s->sc_vers == vers))
- goto done;
- p = s;
- }
-done:
- *prev = p;
- return (s);
-}
-
-/* ******************* REPLY GENERATION ROUTINES ************ */
-
-/*
- * Send a reply to an rpc request
- */
-bool_t
-svc_sendreply(xprt, xdr_results, xdr_location)
- register SVCXPRT *xprt;
- xdrproc_t xdr_results;
- caddr_t xdr_location;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_ACCEPTED;
- rply.acpted_rply.ar_verf = xprt->xp_verf;
- rply.acpted_rply.ar_stat = SUCCESS;
- rply.acpted_rply.ar_results.where = xdr_location;
- rply.acpted_rply.ar_results.proc = xdr_results;
- return (SVC_REPLY(xprt, &rply));
-}
-
-/*
- * No procedure error reply
- */
-void
-svcerr_noproc(xprt)
- register SVCXPRT *xprt;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_ACCEPTED;
- rply.acpted_rply.ar_verf = xprt->xp_verf;
- rply.acpted_rply.ar_stat = PROC_UNAVAIL;
- SVC_REPLY(xprt, &rply);
-}
-
-/*
- * Can't decode args error reply
- */
-void
-svcerr_decode(xprt)
- register SVCXPRT *xprt;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_ACCEPTED;
- rply.acpted_rply.ar_verf = xprt->xp_verf;
- rply.acpted_rply.ar_stat = GARBAGE_ARGS;
- SVC_REPLY(xprt, &rply);
-}
-
-/*
- * Some system error
- */
-void
-svcerr_systemerr(xprt)
- register SVCXPRT *xprt;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_ACCEPTED;
- rply.acpted_rply.ar_verf = xprt->xp_verf;
- rply.acpted_rply.ar_stat = SYSTEM_ERR;
- SVC_REPLY(xprt, &rply);
-}
-
-/*
- * Authentication error reply
- */
-void
-svcerr_auth(xprt, why)
- SVCXPRT *xprt;
- enum auth_stat why;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_DENIED;
- rply.rjcted_rply.rj_stat = AUTH_ERROR;
- rply.rjcted_rply.rj_why = why;
- SVC_REPLY(xprt, &rply);
-}
-
-/*
- * Auth too weak error reply
- */
-void
-svcerr_weakauth(xprt)
- SVCXPRT *xprt;
-{
-
- svcerr_auth(xprt, AUTH_TOOWEAK);
-}
-
-/*
- * Program unavailable error reply
- */
-void
-svcerr_noprog(xprt)
- register SVCXPRT *xprt;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_ACCEPTED;
- rply.acpted_rply.ar_verf = xprt->xp_verf;
- rply.acpted_rply.ar_stat = PROG_UNAVAIL;
- SVC_REPLY(xprt, &rply);
-}
-
-/*
- * Program version mismatch error reply
- */
-void
-svcerr_progvers(xprt, low_vers, high_vers)
- register SVCXPRT *xprt;
- u_long low_vers;
- u_long high_vers;
-{
- struct rpc_msg rply;
-
- rply.rm_direction = REPLY;
- rply.rm_reply.rp_stat = MSG_ACCEPTED;
- rply.acpted_rply.ar_verf = xprt->xp_verf;
- rply.acpted_rply.ar_stat = PROG_MISMATCH;
- rply.acpted_rply.ar_vers.low = low_vers;
- rply.acpted_rply.ar_vers.high = high_vers;
- SVC_REPLY(xprt, &rply);
-}
-
-/* ******************* SERVER INPUT STUFF ******************* */
-
-/*
- * Get server side input from some transport.
- *
- * Statement of authentication parameters management:
- * This function owns and manages all authentication parameters, specifically
- * the "raw" parameters (msg.rm_call.cb_cred and msg.rm_call.cb_verf) and
- * the "cooked" credentials (rqst->rq_clntcred).
- * However, this function does not know the structure of the cooked
- * credentials, so it make the following assumptions:
- * a) the structure is contiguous (no pointers), and
- * b) the cred structure size does not exceed RQCRED_SIZE bytes.
- * In all events, all three parameters are freed upon exit from this routine.
- * The storage is trivially management on the call stack in user land, but
- * is mallocated in kernel land.
- */
-
-void
-svc_getreq(rdfds)
- int rdfds;
-{
- fd_set readfds;
-
- FD_ZERO(&readfds);
- readfds.fds_bits[0] = rdfds;
- svc_getreqset(&readfds);
-}
-
-void svc_getreqset2 __P((fd_set *, int));
-
-void
-svc_getreqset(readfds)
- fd_set *readfds;
-{
- svc_getreqset2(readfds, FD_SETSIZE);
-}
-
-void
-svc_getreqset2(readfds, width)
- fd_set *readfds;
- int width;
-{
- enum xprt_stat stat;
- struct rpc_msg msg;
- int prog_found;
- u_long low_vers;
- u_long high_vers;
- struct svc_req r;
- register SVCXPRT *xprt;
- register int bit;
- register fd_mask mask, *maskp;
- register int sock;
- bool_t no_dispatch;
- char cred_area[2*MAX_AUTH_BYTES + RQCRED_SIZE];
- msg.rm_call.cb_cred.oa_base = cred_area;
- msg.rm_call.cb_verf.oa_base = &(cred_area[MAX_AUTH_BYTES]);
- r.rq_clntcred = &(cred_area[2*MAX_AUTH_BYTES]);
-
- maskp = readfds->fds_bits;
- for (sock = 0; sock < width; sock += NFDBITS) {
- for (mask = *maskp++; (bit = ffs(mask)); mask ^= (1 << (bit - 1))) {
- /* sock has input waiting */
- xprt = xports[sock + bit - 1];
- if (xprt == NULL)
- /* But do we control sock? */
- continue;
- /* now receive msgs from xprtprt (support batch calls) */
- do {
- if (SVC_RECV(xprt, &msg)) {
-
- /* now find the exported program and call it */
- register struct svc_callout *s;
- enum auth_stat why;
-
- r.rq_xprt = xprt;
- r.rq_prog = msg.rm_call.cb_prog;
- r.rq_vers = msg.rm_call.cb_vers;
- r.rq_proc = msg.rm_call.cb_proc;
- r.rq_cred = msg.rm_call.cb_cred;
-
- no_dispatch = FALSE;
-
- /* first authenticate the message */
- if ((why = _authenticate(&r, &msg, &no_dispatch)) != AUTH_OK) {
- svcerr_auth(xprt, why);
- goto call_done;
- }
- else if (no_dispatch) {
- goto call_done;
- }
- /* now match message with a registered service*/
- prog_found = FALSE;
- low_vers = (u_long) -1;
- high_vers = 0;
- for (s = svc_head; s != NULL_SVC; s = s->sc_next) {
- if (s->sc_prog == r.rq_prog) {
- if (s->sc_vers == r.rq_vers) {
- (*s->sc_dispatch)(&r, xprt);
- goto call_done;
- } /* found correct version */
- prog_found = TRUE;
- if (s->sc_vers < low_vers)
- low_vers = s->sc_vers;
- if (s->sc_vers > high_vers)
- high_vers = s->sc_vers;
- } /* found correct program */
- }
- /*
- * if we got here, the program or version
- * is not served ...
- */
- if (prog_found)
- svcerr_progvers(xprt,
- low_vers, high_vers);
- else
- svcerr_noprog(xprt);
- /* Fall through to ... */
- }
- call_done:
- if ((stat = SVC_STAT(xprt)) == XPRT_DIED) {
- SVC_DESTROY(xprt);
- break;
- }
- } while (stat == XPRT_MOREREQS);
- }
- }
-}
projects / nfs-utils.git / blobdiff