480 lines
11 KiB
C
480 lines
11 KiB
C
/* @(#)svc.c 2.4 88/08/11 4.0 RPCSRC; from 1.44 88/02/08 SMI */
|
|
/*
|
|
* 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(lint) && defined(SCCSIDS)
|
|
static char sccsid[] = "@(#)svc.c 1.41 87/10/13 Copyr 1984 Sun Micro";
|
|
#endif
|
|
|
|
/*
|
|
* 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 <sys/errno.h>
|
|
#include <rpc/rpc.h>
|
|
#include <rpc/pmap_clnt.h>
|
|
|
|
extern int errno;
|
|
|
|
#ifdef FD_SETSIZE
|
|
static SVCXPRT **xports;
|
|
#else
|
|
#define NOFILE 32
|
|
|
|
static SVCXPRT *xports[NOFILE];
|
|
#endif /* def FD_SETSIZE */
|
|
|
|
#define NULL_SVC ((struct svc_callout *)0)
|
|
#define RQCRED_SIZE 400 /* this size is excessive */
|
|
|
|
/*
|
|
* 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();
|
|
|
|
/* *************** SVCXPRT related stuff **************** */
|
|
|
|
/*
|
|
* Activate a transport handle.
|
|
*/
|
|
void
|
|
xprt_register(xprt)
|
|
SVCXPRT *xprt;
|
|
{
|
|
register int sock = xprt->xp_sock;
|
|
|
|
#ifdef FD_SETSIZE
|
|
if (xports == NULL) {
|
|
xports = (SVCXPRT **)
|
|
mem_alloc(FD_SETSIZE * sizeof(SVCXPRT *));
|
|
}
|
|
if (sock < _rpc_dtablesize()) {
|
|
xports[sock] = xprt;
|
|
FD_SET(sock, &svc_fdset);
|
|
}
|
|
#else
|
|
if (sock < NOFILE) {
|
|
xports[sock] = xprt;
|
|
svc_fds |= (1 << sock);
|
|
}
|
|
#endif /* def FD_SETSIZE */
|
|
|
|
}
|
|
|
|
/*
|
|
* De-activate a transport handle.
|
|
*/
|
|
void
|
|
xprt_unregister(xprt)
|
|
SVCXPRT *xprt;
|
|
{
|
|
register int sock = xprt->xp_sock;
|
|
|
|
#ifdef FD_SETSIZE
|
|
if ((sock < _rpc_dtablesize()) && (xports[sock] == xprt)) {
|
|
xports[sock] = (SVCXPRT *)0;
|
|
FD_CLR(sock, &svc_fdset);
|
|
}
|
|
#else
|
|
if ((sock < NOFILE) && (xports[sock] == xprt)) {
|
|
xports[sock] = (SVCXPRT *)0;
|
|
svc_fds &= ~(1 << sock);
|
|
}
|
|
#endif /* def FD_SETSIZE */
|
|
}
|
|
|
|
|
|
/* ********************** 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;
|
|
{
|
|
#ifdef FD_SETSIZE
|
|
fd_set readfds;
|
|
|
|
FD_ZERO(&readfds);
|
|
readfds.fds_bits[0] = rdfds;
|
|
svc_getreqset(&readfds);
|
|
#else
|
|
int readfds = rdfds & svc_fds;
|
|
|
|
svc_getreqset(&readfds);
|
|
#endif /* def FD_SETSIZE */
|
|
}
|
|
|
|
void
|
|
svc_getreqset(readfds)
|
|
#ifdef FD_SETSIZE
|
|
fd_set *readfds;
|
|
{
|
|
#else
|
|
int *readfds;
|
|
{
|
|
int readfds_local = *readfds;
|
|
#endif /* def FD_SETSIZE */
|
|
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 u_long mask;
|
|
register int bit;
|
|
register u_long *maskp;
|
|
register int setsize;
|
|
register int sock;
|
|
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]);
|
|
|
|
|
|
#ifdef FD_SETSIZE
|
|
setsize = _rpc_dtablesize();
|
|
maskp = (u_long *)readfds->fds_bits;
|
|
for (sock = 0; sock < setsize; sock += NFDBITS) {
|
|
for (mask = *maskp++; bit = ffs(mask); mask ^= (1 << (bit - 1))) {
|
|
/* sock has input waiting */
|
|
xprt = xports[sock + bit - 1];
|
|
#else
|
|
for (sock = 0; readfds_local != 0; sock++, readfds_local >>= 1) {
|
|
if ((readfds_local & 1) != 0) {
|
|
/* sock has input waiting */
|
|
xprt = xports[sock];
|
|
#endif /* def FD_SETSIZE */
|
|
/* 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;
|
|
/* first authenticate the message */
|
|
if ((why= _authenticate(&r, &msg)) != AUTH_OK) {
|
|
svcerr_auth(xprt, why);
|
|
goto call_done;
|
|
}
|
|
/* now match message with a registered service*/
|
|
prog_found = FALSE;
|
|
low_vers = 0 - 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);
|
|
}
|
|
}
|
|
}
|