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freebsd-dev/sys/rpc/rpc_generic.c

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/* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink 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.
*/
/* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* rpc_generic.c, Miscl routines for RPC.
*
*/
#include "opt_inet6.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/proc.h>
#include <sys/protosw.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
#include <rpc/rpc.h>
#include <rpc/nettype.h>
#include <rpc/rpc_com.h>
#if __FreeBSD_version < 700000
#define strrchr rindex
#endif
struct handle {
NCONF_HANDLE *nhandle;
int nflag; /* Whether NETPATH or NETCONFIG */
int nettype;
};
static const struct _rpcnettype {
const char *name;
const int type;
} _rpctypelist[] = {
{ "netpath", _RPC_NETPATH },
{ "visible", _RPC_VISIBLE },
{ "circuit_v", _RPC_CIRCUIT_V },
{ "datagram_v", _RPC_DATAGRAM_V },
{ "circuit_n", _RPC_CIRCUIT_N },
{ "datagram_n", _RPC_DATAGRAM_N },
{ "tcp", _RPC_TCP },
{ "udp", _RPC_UDP },
{ 0, _RPC_NONE }
};
struct netid_af {
const char *netid;
int af;
int protocol;
};
static const struct netid_af na_cvt[] = {
{ "udp", AF_INET, IPPROTO_UDP },
{ "tcp", AF_INET, IPPROTO_TCP },
#ifdef INET6
{ "udp6", AF_INET6, IPPROTO_UDP },
{ "tcp6", AF_INET6, IPPROTO_TCP },
#endif
{ "local", AF_LOCAL, 0 }
};
struct rpc_createerr rpc_createerr;
/*
* Find the appropriate buffer size
*/
u_int
/*ARGSUSED*/
__rpc_get_t_size(int af, int proto, int size)
{
int maxsize, defsize;
maxsize = 256 * 1024; /* XXX */
switch (proto) {
case IPPROTO_TCP:
defsize = 64 * 1024; /* XXX */
break;
case IPPROTO_UDP:
defsize = UDPMSGSIZE;
break;
default:
defsize = RPC_MAXDATASIZE;
break;
}
if (size == 0)
return defsize;
/* Check whether the value is within the upper max limit */
return (size > maxsize ? (u_int)maxsize : (u_int)size);
}
/*
* Find the appropriate address buffer size
*/
u_int
__rpc_get_a_size(af)
int af;
{
switch (af) {
case AF_INET:
return sizeof (struct sockaddr_in);
#ifdef INET6
case AF_INET6:
return sizeof (struct sockaddr_in6);
#endif
case AF_LOCAL:
return sizeof (struct sockaddr_un);
default:
break;
}
return ((u_int)RPC_MAXADDRSIZE);
}
#if 0
/*
* Used to ping the NULL procedure for clnt handle.
* Returns NULL if fails, else a non-NULL pointer.
*/
void *
rpc_nullproc(clnt)
CLIENT *clnt;
{
struct timeval TIMEOUT = {25, 0};
if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
(xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
return (NULL);
}
return ((void *) clnt);
}
#endif
int
__rpc_socket2sockinfo(struct socket *so, struct __rpc_sockinfo *sip)
{
int type, proto;
struct sockaddr *sa;
sa_family_t family;
struct sockopt opt;
int error;
error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
if (error)
return 0;
sip->si_alen = sa->sa_len;
family = sa->sa_family;
free(sa, M_SONAME);
opt.sopt_dir = SOPT_GET;
opt.sopt_level = SOL_SOCKET;
opt.sopt_name = SO_TYPE;
opt.sopt_val = &type;
opt.sopt_valsize = sizeof type;
opt.sopt_td = NULL;
error = sogetopt(so, &opt);
if (error)
return 0;
/* XXX */
if (family != AF_LOCAL) {
if (type == SOCK_STREAM)
proto = IPPROTO_TCP;
else if (type == SOCK_DGRAM)
proto = IPPROTO_UDP;
else
return 0;
} else
proto = 0;
sip->si_af = family;
sip->si_proto = proto;
sip->si_socktype = type;
return 1;
}
/*
* Linear search, but the number of entries is small.
*/
int
__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
{
int i;
for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
strcmp(nconf->nc_netid, "unix") == 0 &&
strcmp(na_cvt[i].netid, "local") == 0)) {
sip->si_af = na_cvt[i].af;
sip->si_proto = na_cvt[i].protocol;
sip->si_socktype =
__rpc_seman2socktype((int)nconf->nc_semantics);
if (sip->si_socktype == -1)
return 0;
sip->si_alen = __rpc_get_a_size(sip->si_af);
return 1;
}
return 0;
}
struct socket *
__rpc_nconf2socket(const struct netconfig *nconf)
{
struct __rpc_sockinfo si;
struct socket *so;
int error;
if (!__rpc_nconf2sockinfo(nconf, &si))
return 0;
so = NULL;
error = socreate(si.si_af, &so, si.si_socktype, si.si_proto,
curthread->td_ucred, curthread);
if (error)
return NULL;
else
return so;
}
char *
taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
{
struct __rpc_sockinfo si;
if (!__rpc_nconf2sockinfo(nconf, &si))
return NULL;
return __rpc_taddr2uaddr_af(si.si_af, nbuf);
}
struct netbuf *
uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
{
struct __rpc_sockinfo si;
if (!__rpc_nconf2sockinfo(nconf, &si))
return NULL;
return __rpc_uaddr2taddr_af(si.si_af, uaddr);
}
char *
__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
{
char *ret;
struct sbuf sb;
struct sockaddr_in *sin;
struct sockaddr_un *sun;
char namebuf[INET_ADDRSTRLEN];
#ifdef INET6
struct sockaddr_in6 *sin6;
char namebuf6[INET6_ADDRSTRLEN];
#endif
u_int16_t port;
sbuf_new(&sb, NULL, 0, SBUF_AUTOEXTEND);
switch (af) {
case AF_INET:
sin = nbuf->buf;
if (__rpc_inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
== NULL)
return NULL;
port = ntohs(sin->sin_port);
if (sbuf_printf(&sb, "%s.%u.%u", namebuf,
((uint32_t)port) >> 8,
port & 0xff) < 0)
return NULL;
break;
#ifdef INET6
case AF_INET6:
sin6 = nbuf->buf;
if (__rpc_inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
== NULL)
return NULL;
port = ntohs(sin6->sin6_port);
if (sbuf_printf(&sb, "%s.%u.%u", namebuf6,
((uint32_t)port) >> 8,
port & 0xff) < 0)
return NULL;
break;
#endif
case AF_LOCAL:
sun = nbuf->buf;
if (sbuf_printf(&sb, "%.*s", (int)(sun->sun_len -
offsetof(struct sockaddr_un, sun_path)),
sun->sun_path) < 0)
return (NULL);
break;
default:
return NULL;
}
sbuf_finish(&sb);
ret = strdup(sbuf_data(&sb), M_RPC);
sbuf_delete(&sb);
return ret;
}
struct netbuf *
__rpc_uaddr2taddr_af(int af, const char *uaddr)
{
struct netbuf *ret = NULL;
char *addrstr, *p;
unsigned port, portlo, porthi;
struct sockaddr_in *sin;
#ifdef INET6
struct sockaddr_in6 *sin6;
#endif
struct sockaddr_un *sun;
port = 0;
sin = NULL;
addrstr = strdup(uaddr, M_RPC);
if (addrstr == NULL)
return NULL;
/*
* AF_LOCAL addresses are expected to be absolute
* pathnames, anything else will be AF_INET or AF_INET6.
*/
if (*addrstr != '/') {
p = strrchr(addrstr, '.');
if (p == NULL)
goto out;
portlo = (unsigned)strtol(p + 1, NULL, 10);
*p = '\0';
p = strrchr(addrstr, '.');
if (p == NULL)
goto out;
porthi = (unsigned)strtol(p + 1, NULL, 10);
*p = '\0';
port = (porthi << 8) | portlo;
}
ret = (struct netbuf *)malloc(sizeof *ret, M_RPC, M_WAITOK);
if (ret == NULL)
goto out;
switch (af) {
case AF_INET:
sin = (struct sockaddr_in *)malloc(sizeof *sin, M_RPC,
M_WAITOK);
if (sin == NULL)
goto out;
memset(sin, 0, sizeof *sin);
sin->sin_family = AF_INET;
sin->sin_port = htons(port);
if (__rpc_inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
free(sin, M_RPC);
free(ret, M_RPC);
ret = NULL;
goto out;
}
sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
ret->buf = sin;
break;
#ifdef INET6
case AF_INET6:
sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6, M_RPC,
M_WAITOK);
if (sin6 == NULL)
goto out;
memset(sin6, 0, sizeof *sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(port);
if (__rpc_inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
free(sin6, M_RPC);
free(ret, M_RPC);
ret = NULL;
goto out;
}
sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
ret->buf = sin6;
break;
#endif
case AF_LOCAL:
sun = (struct sockaddr_un *)malloc(sizeof *sun, M_RPC,
M_WAITOK);
if (sun == NULL)
goto out;
memset(sun, 0, sizeof *sun);
sun->sun_family = AF_LOCAL;
strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
ret->buf = sun;
break;
default:
break;
}
out:
free(addrstr, M_RPC);
return ret;
}
int
__rpc_seman2socktype(int semantics)
{
switch (semantics) {
case NC_TPI_CLTS:
return SOCK_DGRAM;
case NC_TPI_COTS_ORD:
return SOCK_STREAM;
case NC_TPI_RAW:
return SOCK_RAW;
default:
break;
}
return -1;
}
int
__rpc_socktype2seman(int socktype)
{
switch (socktype) {
case SOCK_DGRAM:
return NC_TPI_CLTS;
case SOCK_STREAM:
return NC_TPI_COTS_ORD;
case SOCK_RAW:
return NC_TPI_RAW;
default:
break;
}
return -1;
}
/*
* Returns the type of the network as defined in <rpc/nettype.h>
* If nettype is NULL, it defaults to NETPATH.
*/
static int
getnettype(const char *nettype)
{
int i;
if ((nettype == NULL) || (nettype[0] == 0)) {
return (_RPC_NETPATH); /* Default */
}
#if 0
nettype = strlocase(nettype);
#endif
for (i = 0; _rpctypelist[i].name; i++)
if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
return (_rpctypelist[i].type);
}
return (_rpctypelist[i].type);
}
/*
* For the given nettype (tcp or udp only), return the first structure found.
* This should be freed by calling freenetconfigent()
*/
struct netconfig *
__rpc_getconfip(const char *nettype)
{
char *netid;
static char *netid_tcp = (char *) NULL;
static char *netid_udp = (char *) NULL;
struct netconfig *dummy;
if (!netid_udp && !netid_tcp) {
struct netconfig *nconf;
void *confighandle;
if (!(confighandle = setnetconfig())) {
log(LOG_ERR, "rpc: failed to open " NETCONFIG);
return (NULL);
}
while ((nconf = getnetconfig(confighandle)) != NULL) {
if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
netid_tcp = strdup(nconf->nc_netid,
M_RPC);
} else
if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
netid_udp = strdup(nconf->nc_netid,
M_RPC);
}
}
}
endnetconfig(confighandle);
}
if (strcmp(nettype, "udp") == 0)
netid = netid_udp;
else if (strcmp(nettype, "tcp") == 0)
netid = netid_tcp;
else {
return (NULL);
}
if ((netid == NULL) || (netid[0] == 0)) {
return (NULL);
}
dummy = getnetconfigent(netid);
return (dummy);
}
/*
* Returns the type of the nettype, which should then be used with
* __rpc_getconf().
*
* For simplicity in the kernel, we don't support the NETPATH
* environment variable. We behave as userland would then NETPATH is
* unset, i.e. iterate over all visible entries in netconfig.
*/
void *
__rpc_setconf(nettype)
const char *nettype;
{
struct handle *handle;
handle = (struct handle *) malloc(sizeof (struct handle),
M_RPC, M_WAITOK);
switch (handle->nettype = getnettype(nettype)) {
case _RPC_NETPATH:
case _RPC_CIRCUIT_N:
case _RPC_DATAGRAM_N:
if (!(handle->nhandle = setnetconfig()))
goto failed;
handle->nflag = TRUE;
break;
case _RPC_VISIBLE:
case _RPC_CIRCUIT_V:
case _RPC_DATAGRAM_V:
case _RPC_TCP:
case _RPC_UDP:
if (!(handle->nhandle = setnetconfig())) {
log(LOG_ERR, "rpc: failed to open " NETCONFIG);
goto failed;
}
handle->nflag = FALSE;
break;
default:
goto failed;
}
return (handle);
failed:
free(handle, M_RPC);
return (NULL);
}
/*
* Returns the next netconfig struct for the given "net" type.
* __rpc_setconf() should have been called previously.
*/
struct netconfig *
__rpc_getconf(void *vhandle)
{
struct handle *handle;
struct netconfig *nconf;
handle = (struct handle *)vhandle;
if (handle == NULL) {
return (NULL);
}
for (;;) {
if (handle->nflag) {
nconf = getnetconfig(handle->nhandle);
if (nconf && !(nconf->nc_flag & NC_VISIBLE))
continue;
} else {
nconf = getnetconfig(handle->nhandle);
}
if (nconf == NULL)
break;
if ((nconf->nc_semantics != NC_TPI_CLTS) &&
(nconf->nc_semantics != NC_TPI_COTS) &&
(nconf->nc_semantics != NC_TPI_COTS_ORD))
continue;
switch (handle->nettype) {
case _RPC_VISIBLE:
if (!(nconf->nc_flag & NC_VISIBLE))
continue;
/* FALLTHROUGH */
case _RPC_NETPATH: /* Be happy */
break;
case _RPC_CIRCUIT_V:
if (!(nconf->nc_flag & NC_VISIBLE))
continue;
/* FALLTHROUGH */
case _RPC_CIRCUIT_N:
if ((nconf->nc_semantics != NC_TPI_COTS) &&
(nconf->nc_semantics != NC_TPI_COTS_ORD))
continue;
break;
case _RPC_DATAGRAM_V:
if (!(nconf->nc_flag & NC_VISIBLE))
continue;
/* FALLTHROUGH */
case _RPC_DATAGRAM_N:
if (nconf->nc_semantics != NC_TPI_CLTS)
continue;
break;
case _RPC_TCP:
if (((nconf->nc_semantics != NC_TPI_COTS) &&
(nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
(strcmp(nconf->nc_protofmly, NC_INET)
#ifdef INET6
&& strcmp(nconf->nc_protofmly, NC_INET6))
#else
)
#endif
||
strcmp(nconf->nc_proto, NC_TCP))
continue;
break;
case _RPC_UDP:
if ((nconf->nc_semantics != NC_TPI_CLTS) ||
(strcmp(nconf->nc_protofmly, NC_INET)
#ifdef INET6
&& strcmp(nconf->nc_protofmly, NC_INET6))
#else
)
#endif
||
strcmp(nconf->nc_proto, NC_UDP))
continue;
break;
}
break;
}
return (nconf);
}
void
__rpc_endconf(vhandle)
void * vhandle;
{
struct handle *handle;
handle = (struct handle *) vhandle;
if (handle == NULL) {
return;
}
endnetconfig(handle->nhandle);
free(handle, M_RPC);
}
int
__rpc_sockisbound(struct socket *so)
{
struct sockaddr *sa;
int error, bound;
error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
if (error)
return (0);
switch (sa->sa_family) {
case AF_INET:
bound = (((struct sockaddr_in *) sa)->sin_port != 0);
break;
#ifdef INET6
case AF_INET6:
bound = (((struct sockaddr_in6 *) sa)->sin6_port != 0);
break;
#endif
case AF_LOCAL:
/* XXX check this */
bound = (((struct sockaddr_un *) sa)->sun_path[0] != '\0');
break;
default:
bound = FALSE;
break;
}
free(sa, M_SONAME);
return bound;
}
/*
* Kernel module glue
*/
static int
krpc_modevent(module_t mod, int type, void *data)
{
return (0);
}
static moduledata_t krpc_mod = {
"krpc",
krpc_modevent,
NULL,
};
DECLARE_MODULE(krpc, krpc_mod, SI_SUB_VFS, SI_ORDER_ANY);
/* So that loader and kldload(2) can find us, wherever we are.. */
MODULE_VERSION(krpc, 1);
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