/*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
/*
* svc_generic.c, Server side for RPC.
*
*/
#include <pthread.h>
#include <reentrant.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <rpc/rpc.h>
#include <rpc/nettype.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include "rpc_com.h"
#include <rpc/svc.h>
extern int __svc_vc_setflag(SVCXPRT *, int);
extern int __binddynport(int fd);
/*
* 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(dispatch, prognum, versnum, nettype)
void (*dispatch)(struct svc_req *, SVCXPRT *);
rpcprog_t prognum; /* Program number */
rpcvers_t versnum; /* Version number */
const char *nettype; /* Networktype token */
{
struct xlist {
SVCXPRT *xprt; /* Server handle */
struct xlist *next; /* Next item */
} *l;
static struct xlist *xprtlist; /* A link list of all the handles */
int num = 0;
SVCXPRT *xprt;
struct netconfig *nconf;
void *handle;
extern mutex_t xprtlist_lock;
/* VARIABLES PROTECTED BY xprtlist_lock: xprtlist */
if ((handle = __rpc_setconf(nettype)) == NULL) {
warnx("svc_create: unknown protocol");
return (0);
}
while ((nconf = __rpc_getconf(handle)) != NULL) {
mutex_lock(&xprtlist_lock);
for (l = xprtlist; l; l = l->next) {
if (strcmp(l->xprt->xp_netid, nconf->nc_netid) == 0) {
/* Found an old one, use it */
(void) rpcb_unset(prognum, versnum, nconf);
if (svc_reg(l->xprt, prognum, versnum,
dispatch, nconf) == FALSE)
warnx(
"svc_create: could not register prog %u vers %u on %s",
(unsigned)prognum, (unsigned)versnum,
nconf->nc_netid);
else
num++;
break;
}
}
if (l == NULL) {
/* It was not found. Now create a new one */
xprt = svc_tp_create(dispatch, prognum, versnum, nconf);
if (xprt) {
l = (struct xlist *)malloc(sizeof (*l));
if (l == NULL) {
warnx("svc_create: no memory");
mutex_unlock(&xprtlist_lock);
__rpc_endconf(handle);
return (0);
}
l->xprt = xprt;
l->next = xprtlist;
xprtlist = l;
num++;
}
}
mutex_unlock(&xprtlist_lock);
}
__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(dispatch, prognum, versnum, nconf)
void (*dispatch)(struct svc_req *, SVCXPRT *);
rpcprog_t prognum; /* Program number */
rpcvers_t versnum; /* Version number */
const struct netconfig *nconf; /* Netconfig structure for the network */
{
SVCXPRT *xprt;
if (nconf == NULL) {
warnx(
"svc_tp_create: invalid netconfig structure for prog %u vers %u",
(unsigned)prognum, (unsigned)versnum);
return (NULL);
}
xprt = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0);
if (xprt == NULL) {
return (NULL);
}
/*LINTED const castaway*/
(void) rpcb_unset(prognum, versnum, (struct netconfig *) nconf);
if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
warnx(
"svc_tp_create: Could not register prog %u vers %u on %s",
(unsigned)prognum, (unsigned)versnum,
nconf->nc_netid);
SVC_DESTROY(xprt);
return (NULL);
}
return (xprt);
}
/*
* If fd is RPC_ANYFD, then it opens a fd 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(fd, nconf, bindaddr, sendsz, recvsz)
int fd; /* Connection end point */
const struct netconfig *nconf; /* Netconfig struct for nettoken */
const struct t_bind *bindaddr; /* Local bind address */
u_int sendsz; /* Max sendsize */
u_int recvsz; /* Max recvsize */
{
SVCXPRT *xprt = NULL; /* service handle */
bool_t madefd = FALSE; /* whether fd opened here */
struct __rpc_sockinfo si;
struct sockaddr_storage ss;
socklen_t slen;
if (fd == RPC_ANYFD) {
if (nconf == NULL) {
warnx("svc_tli_create: invalid netconfig");
return (NULL);
}
fd = __rpc_nconf2fd(nconf);
if (fd == -1) {
warnx(
"svc_tli_create: could not open connection for %s",
nconf->nc_netid);
return (NULL);
}
__rpc_nconf2sockinfo(nconf, &si);
madefd = TRUE;
} else {
/*
* It is an open descriptor. Get the transport info.
*/
if (!__rpc_fd2sockinfo(fd, &si)) {
warnx(
"svc_tli_create: could not get transport information");
return (NULL);
}
}
/*
* If the fd is unbound, try to bind it.
*/
if (madefd || !__rpc_sockisbound(fd)) {
if (bindaddr == NULL) {
if (__binddynport(fd) == -1) {
warnx(
"svc_tli_create: could not bind to anonymous port");
goto freedata;
}
listen(fd, SOMAXCONN);
} else {
if (bind(fd,
(struct sockaddr *)bindaddr->addr.buf,
(socklen_t)si.si_alen) < 0) {
warnx(
"svc_tli_create: could not bind to requested address");
goto freedata;
}
listen(fd, (int)bindaddr->qlen);
}
}
/*
* call transport specific function.
*/
switch (si.si_socktype) {
case SOCK_STREAM:
slen = sizeof ss;
if (getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
== 0) {
/* accepted socket */
xprt = svc_fd_create(fd, sendsz, recvsz);
} else
xprt = svc_vc_create(fd, 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(fd, sendsz, recvsz);
break;
default:
warnx("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) {
if (xprt->xp_netid != NULL)
free(xprt->xp_netid);
xprt->xp_netid = strdup(nconf->nc_netid);
xprt->xp_tp = strdup(nconf->nc_device);
}
return (xprt);
freedata:
if (madefd)
(void)close(fd);
if (xprt) {
if (!madefd) /* so that svc_destroy doesnt close fd */
xprt->xp_fd = RPC_ANYFD;
SVC_DESTROY(xprt);
}
return (NULL);
}