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/* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */
/*
* 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
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
#if defined(LIBC_SCCS) && !defined(lint)
#ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/rpc/svc_generic.c 218757 2011-02-16 21:29:13Z bz $");
/*
* svc_generic.c, Server side for RPC.
*
*/
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/lock.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/protosw.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <sys/sx.h>
#include <sys/ucred.h>
#include <net/vnet.h>
#include <rpc/rpc.h>
#include <rpc/rpcb_clnt.h>
#include <rpc/nettype.h>
#include <rpc/rpc_com.h>
extern int __svc_vc_setflag(SVCXPRT *, int);
/*
* The highest level interface for server creation.
* It tries for all the nettokens in that particular class of token
* and returns the number of handles it can create and/or find.
*
* It creates a link list of all the handles it could create.
* If svc_create() is called multiple times, it uses the handle
* created earlier instead of creating a new handle every time.
*/
int
svc_create(
SVCPOOL *pool,
void (*dispatch)(struct svc_req *, SVCXPRT *),
rpcprog_t prognum, /* Program number */
rpcvers_t versnum, /* Version number */
const char *nettype) /* Networktype token */
{
int num = 0;
SVCXPRT *xprt;
struct netconfig *nconf;
void *handle;
if ((handle = __rpc_setconf(nettype)) == NULL) {
printf("svc_create: unknown protocol");
return (0);
}
while ((nconf = __rpc_getconf(handle)) != NULL) {
mtx_lock(&pool->sp_lock);
TAILQ_FOREACH(xprt, &pool->sp_xlist, xp_link) {
if (strcmp(xprt->xp_netid, nconf->nc_netid) == 0) {
/* Found an old one, use it */
mtx_unlock(&pool->sp_lock);
(void) rpcb_unset(prognum, versnum, nconf);
if (svc_reg(xprt, prognum, versnum,
dispatch, nconf) == FALSE) {
printf(
"svc_create: could not register prog %u vers %u on %s\n",
(unsigned)prognum, (unsigned)versnum,
nconf->nc_netid);
mtx_lock(&pool->sp_lock);
} else {
num++;
mtx_lock(&pool->sp_lock);
break;
}
}
}
mtx_unlock(&pool->sp_lock);
if (xprt == NULL) {
/* It was not found. Now create a new one */
xprt = svc_tp_create(pool, dispatch, prognum, versnum,
NULL, nconf);
if (xprt) {
num++;
SVC_RELEASE(xprt);
}
}
}
__rpc_endconf(handle);
/*
* In case of num == 0; the error messages are generated by the
* underlying layers; and hence not needed here.
*/
return (num);
}
/*
* The high level interface to svc_tli_create().
* It tries to create a server for "nconf" and registers the service
* with the rpcbind. It calls svc_tli_create();
*/
SVCXPRT *
svc_tp_create(
SVCPOOL *pool,
void (*dispatch)(struct svc_req *, SVCXPRT *),
rpcprog_t prognum, /* Program number */
rpcvers_t versnum, /* Version number */
const char *uaddr, /* Address (or null for default) */
const struct netconfig *nconf) /* Netconfig structure for the network */
{
struct netconfig nconfcopy;
struct netbuf *taddr;
struct t_bind bind;
SVCXPRT *xprt;
if (nconf == NULL) {
printf(
"svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
(unsigned)prognum, (unsigned)versnum);
return (NULL);
}
if (uaddr) {
taddr = uaddr2taddr(nconf, uaddr);
bind.addr = *taddr;
free(taddr, M_RPC);
bind.qlen = SOMAXCONN;
xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
free(bind.addr.buf, M_RPC);
} else {
xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
}
if (xprt == NULL) {
return (NULL);
}
/*LINTED const castaway*/
nconfcopy = *nconf;
(void) rpcb_unset(prognum, versnum, &nconfcopy);
if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
printf(
"svc_tp_create: Could not register prog %u vers %u on %s\n",
(unsigned)prognum, (unsigned)versnum,
nconf->nc_netid);
xprt_unregister(xprt);
SVC_RELEASE(xprt);
return (NULL);
}
return (xprt);
}
/*
* If so is NULL, then it opens a socket for the given transport
* provider (nconf cannot be NULL then). If the t_state is T_UNBND and
* bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
* NULL bindadr and Connection oriented transports, the value of qlen
* is set to 8.
*
* If sendsz or recvsz are zero, their default values are chosen.
*/
SVCXPRT *
svc_tli_create(
SVCPOOL *pool,
struct socket *so, /* Connection end point */
const struct netconfig *nconf, /* Netconfig struct for nettoken */
const struct t_bind *bindaddr, /* Local bind address */
size_t sendsz, /* Max sendsize */
size_t recvsz) /* Max recvsize */
{
SVCXPRT *xprt = NULL; /* service handle */
bool_t madeso = FALSE; /* whether so opened here */
struct __rpc_sockinfo si;
struct sockaddr_storage ss;
if (!so) {
if (nconf == NULL) {
printf("svc_tli_create: invalid netconfig\n");
return (NULL);
}
so = __rpc_nconf2socket(nconf);
if (!so) {
printf(
"svc_tli_create: could not open connection for %s\n",
nconf->nc_netid);
return (NULL);
}
__rpc_nconf2sockinfo(nconf, &si);
madeso = TRUE;
} else {
/*
* It is an open socket. Get the transport info.
*/
if (!__rpc_socket2sockinfo(so, &si)) {
printf(
"svc_tli_create: could not get transport information\n");
return (NULL);
}
}
/*
* If the socket is unbound, try to bind it.
*/
if (madeso || !__rpc_sockisbound(so)) {
if (bindaddr == NULL) {
if (bindresvport(so, NULL)) {
memset(&ss, 0, sizeof ss);
ss.ss_family = si.si_af;
ss.ss_len = si.si_alen;
if (sobind(so, (struct sockaddr *)&ss,
curthread)) {
printf(
"svc_tli_create: could not bind to anonymous port\n");
goto freedata;
}
}
solisten(so, SOMAXCONN, curthread);
} else {
if (bindresvport(so,
(struct sockaddr *)bindaddr->addr.buf)) {
printf(
"svc_tli_create: could not bind to requested address\n");
goto freedata;
}
solisten(so, (int)bindaddr->qlen, curthread);
}
}
/*
* call transport specific function.
*/
switch (si.si_socktype) {
case SOCK_STREAM:
#if 0
slen = sizeof ss;
if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
== 0) {
/* accepted socket */
xprt = svc_fd_create(fd, sendsz, recvsz);
} else
#endif
xprt = svc_vc_create(pool, so, sendsz, recvsz);
if (!nconf || !xprt)
break;
#if 0
/* XXX fvdl */
if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
strcmp(nconf->nc_protofmly, "inet6") == 0)
(void) __svc_vc_setflag(xprt, TRUE);
#endif
break;
case SOCK_DGRAM:
xprt = svc_dg_create(pool, so, sendsz, recvsz);
break;
default:
printf("svc_tli_create: bad service type");
goto freedata;
}
if (xprt == NULL)
/*
* The error messages here are spitted out by the lower layers:
* svc_vc_create(), svc_fd_create() and svc_dg_create().
*/
goto freedata;
/* Fill in type of service */
xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
if (nconf) {
xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
}
return (xprt);
freedata:
if (madeso)
(void)soclose(so);
if (xprt) {
if (!madeso) /* so that svc_destroy doesnt close fd */
xprt->xp_socket = NULL;
xprt_unregister(xprt);
}
return (NULL);
}