b9b7d3e93a
VNET socket push back: try to minimize the number of places where we have to switch vnets and narrow down the time we stay switched. Add assertions to the socket code to catch possibly unset vnets as seen in r204147. While this reduces the number of vnet recursion in some places like NFS, POSIX local sockets and some netgraph, .. recursions are impossible to fix. The current expectations are documented at the beginning of uipc_socket.c along with the other information there. Sponsored by: The FreeBSD Foundation Sponsored by: CK Software GmbH Reviewed by: jhb Tested by: zec Tested by: Mikolaj Golub (to.my.trociny gmail.com) MFC after: 2 weeks
882 lines
18 KiB
C
882 lines
18 KiB
C
/* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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/*
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* Copyright (c) 1986-1991 by Sun Microsystems Inc.
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*/
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/* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* rpc_generic.c, Miscl routines for RPC.
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*
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*/
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/module.h>
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#include <sys/proc.h>
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#include <sys/protosw.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/syslog.h>
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#include <net/vnet.h>
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#include <rpc/rpc.h>
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#include <rpc/nettype.h>
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#include <rpc/rpc_com.h>
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extern u_long sb_max_adj; /* not defined in socketvar.h */
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#if __FreeBSD_version < 700000
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#define strrchr rindex
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#endif
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struct handle {
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NCONF_HANDLE *nhandle;
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int nflag; /* Whether NETPATH or NETCONFIG */
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int nettype;
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};
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static const struct _rpcnettype {
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const char *name;
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const int type;
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} _rpctypelist[] = {
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{ "netpath", _RPC_NETPATH },
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{ "visible", _RPC_VISIBLE },
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{ "circuit_v", _RPC_CIRCUIT_V },
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{ "datagram_v", _RPC_DATAGRAM_V },
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{ "circuit_n", _RPC_CIRCUIT_N },
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{ "datagram_n", _RPC_DATAGRAM_N },
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{ "tcp", _RPC_TCP },
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{ "udp", _RPC_UDP },
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{ 0, _RPC_NONE }
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};
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struct netid_af {
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const char *netid;
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int af;
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int protocol;
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};
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static const struct netid_af na_cvt[] = {
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{ "udp", AF_INET, IPPROTO_UDP },
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{ "tcp", AF_INET, IPPROTO_TCP },
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#ifdef INET6
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{ "udp6", AF_INET6, IPPROTO_UDP },
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{ "tcp6", AF_INET6, IPPROTO_TCP },
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#endif
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{ "local", AF_LOCAL, 0 }
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};
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struct rpc_createerr rpc_createerr;
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/*
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* Find the appropriate buffer size
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*/
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u_int
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/*ARGSUSED*/
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__rpc_get_t_size(int af, int proto, int size)
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{
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int defsize;
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switch (proto) {
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case IPPROTO_TCP:
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defsize = 64 * 1024; /* XXX */
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break;
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case IPPROTO_UDP:
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defsize = UDPMSGSIZE;
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break;
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default:
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defsize = RPC_MAXDATASIZE;
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break;
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}
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if (size == 0)
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return defsize;
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/* Check whether the value is within the upper max limit */
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return (size > sb_max_adj ? (u_int)sb_max_adj : (u_int)size);
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}
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/*
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* Find the appropriate address buffer size
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*/
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u_int
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__rpc_get_a_size(af)
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int af;
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{
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switch (af) {
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case AF_INET:
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return sizeof (struct sockaddr_in);
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#ifdef INET6
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case AF_INET6:
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return sizeof (struct sockaddr_in6);
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#endif
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case AF_LOCAL:
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return sizeof (struct sockaddr_un);
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default:
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break;
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}
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return ((u_int)RPC_MAXADDRSIZE);
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}
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#if 0
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/*
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* Used to ping the NULL procedure for clnt handle.
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* Returns NULL if fails, else a non-NULL pointer.
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*/
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void *
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rpc_nullproc(clnt)
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CLIENT *clnt;
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{
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struct timeval TIMEOUT = {25, 0};
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if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
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(xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
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return (NULL);
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}
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return ((void *) clnt);
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}
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#endif
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int
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__rpc_socket2sockinfo(struct socket *so, struct __rpc_sockinfo *sip)
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{
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int type, proto;
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struct sockaddr *sa;
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sa_family_t family;
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struct sockopt opt;
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int error;
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CURVNET_SET(so->so_vnet);
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error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
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CURVNET_RESTORE();
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if (error)
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return 0;
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sip->si_alen = sa->sa_len;
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family = sa->sa_family;
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free(sa, M_SONAME);
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opt.sopt_dir = SOPT_GET;
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opt.sopt_level = SOL_SOCKET;
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opt.sopt_name = SO_TYPE;
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opt.sopt_val = &type;
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opt.sopt_valsize = sizeof type;
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opt.sopt_td = NULL;
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error = sogetopt(so, &opt);
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if (error)
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return 0;
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/* XXX */
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if (family != AF_LOCAL) {
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if (type == SOCK_STREAM)
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proto = IPPROTO_TCP;
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else if (type == SOCK_DGRAM)
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proto = IPPROTO_UDP;
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else
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return 0;
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} else
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proto = 0;
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sip->si_af = family;
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sip->si_proto = proto;
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sip->si_socktype = type;
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return 1;
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}
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/*
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* Linear search, but the number of entries is small.
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*/
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int
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__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
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{
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int i;
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for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
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if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
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strcmp(nconf->nc_netid, "unix") == 0 &&
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strcmp(na_cvt[i].netid, "local") == 0)) {
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sip->si_af = na_cvt[i].af;
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sip->si_proto = na_cvt[i].protocol;
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sip->si_socktype =
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__rpc_seman2socktype((int)nconf->nc_semantics);
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if (sip->si_socktype == -1)
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return 0;
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sip->si_alen = __rpc_get_a_size(sip->si_af);
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return 1;
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}
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return 0;
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}
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struct socket *
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__rpc_nconf2socket(const struct netconfig *nconf)
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{
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struct __rpc_sockinfo si;
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struct socket *so;
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int error;
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if (!__rpc_nconf2sockinfo(nconf, &si))
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return 0;
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so = NULL;
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error = socreate(si.si_af, &so, si.si_socktype, si.si_proto,
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curthread->td_ucred, curthread);
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if (error)
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return NULL;
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else
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return so;
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}
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char *
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taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
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{
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struct __rpc_sockinfo si;
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if (!__rpc_nconf2sockinfo(nconf, &si))
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return NULL;
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return __rpc_taddr2uaddr_af(si.si_af, nbuf);
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}
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struct netbuf *
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uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
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{
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struct __rpc_sockinfo si;
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if (!__rpc_nconf2sockinfo(nconf, &si))
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return NULL;
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return __rpc_uaddr2taddr_af(si.si_af, uaddr);
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}
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char *
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__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
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{
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char *ret;
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struct sbuf sb;
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struct sockaddr_in *sin;
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struct sockaddr_un *sun;
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char namebuf[INET_ADDRSTRLEN];
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#ifdef INET6
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struct sockaddr_in6 *sin6;
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char namebuf6[INET6_ADDRSTRLEN];
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#endif
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u_int16_t port;
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sbuf_new(&sb, NULL, 0, SBUF_AUTOEXTEND);
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switch (af) {
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case AF_INET:
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sin = nbuf->buf;
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if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
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== NULL)
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return NULL;
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port = ntohs(sin->sin_port);
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if (sbuf_printf(&sb, "%s.%u.%u", namebuf,
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((uint32_t)port) >> 8,
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port & 0xff) < 0)
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return NULL;
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break;
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#ifdef INET6
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case AF_INET6:
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sin6 = nbuf->buf;
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if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
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== NULL)
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return NULL;
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port = ntohs(sin6->sin6_port);
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if (sbuf_printf(&sb, "%s.%u.%u", namebuf6,
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((uint32_t)port) >> 8,
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port & 0xff) < 0)
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return NULL;
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break;
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#endif
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case AF_LOCAL:
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sun = nbuf->buf;
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if (sbuf_printf(&sb, "%.*s", (int)(sun->sun_len -
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offsetof(struct sockaddr_un, sun_path)),
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sun->sun_path) < 0)
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return (NULL);
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break;
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default:
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return NULL;
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}
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sbuf_finish(&sb);
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ret = strdup(sbuf_data(&sb), M_RPC);
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sbuf_delete(&sb);
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return ret;
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}
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struct netbuf *
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__rpc_uaddr2taddr_af(int af, const char *uaddr)
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{
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struct netbuf *ret = NULL;
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char *addrstr, *p;
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unsigned port, portlo, porthi;
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struct sockaddr_in *sin;
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#ifdef INET6
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struct sockaddr_in6 *sin6;
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#endif
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struct sockaddr_un *sun;
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port = 0;
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sin = NULL;
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addrstr = strdup(uaddr, M_RPC);
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if (addrstr == NULL)
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return NULL;
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/*
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* AF_LOCAL addresses are expected to be absolute
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* pathnames, anything else will be AF_INET or AF_INET6.
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*/
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if (*addrstr != '/') {
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p = strrchr(addrstr, '.');
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if (p == NULL)
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goto out;
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portlo = (unsigned)strtol(p + 1, NULL, 10);
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*p = '\0';
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p = strrchr(addrstr, '.');
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if (p == NULL)
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goto out;
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porthi = (unsigned)strtol(p + 1, NULL, 10);
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*p = '\0';
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port = (porthi << 8) | portlo;
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}
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ret = (struct netbuf *)malloc(sizeof *ret, M_RPC, M_WAITOK);
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if (ret == NULL)
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goto out;
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switch (af) {
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case AF_INET:
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sin = (struct sockaddr_in *)malloc(sizeof *sin, M_RPC,
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M_WAITOK);
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if (sin == NULL)
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goto out;
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memset(sin, 0, sizeof *sin);
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sin->sin_family = AF_INET;
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sin->sin_port = htons(port);
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if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
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free(sin, M_RPC);
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free(ret, M_RPC);
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ret = NULL;
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goto out;
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}
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sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
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ret->buf = sin;
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break;
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#ifdef INET6
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case AF_INET6:
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sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6, M_RPC,
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M_WAITOK);
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if (sin6 == NULL)
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goto out;
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memset(sin6, 0, sizeof *sin6);
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sin6->sin6_family = AF_INET6;
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sin6->sin6_port = htons(port);
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if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
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free(sin6, M_RPC);
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free(ret, M_RPC);
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ret = NULL;
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goto out;
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}
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sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
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ret->buf = sin6;
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break;
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#endif
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case AF_LOCAL:
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sun = (struct sockaddr_un *)malloc(sizeof *sun, M_RPC,
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M_WAITOK);
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if (sun == NULL)
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goto out;
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memset(sun, 0, sizeof *sun);
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sun->sun_family = AF_LOCAL;
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strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
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ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
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ret->buf = sun;
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break;
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default:
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break;
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}
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out:
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free(addrstr, M_RPC);
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return ret;
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}
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int
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__rpc_seman2socktype(int semantics)
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{
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switch (semantics) {
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case NC_TPI_CLTS:
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return SOCK_DGRAM;
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case NC_TPI_COTS_ORD:
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return SOCK_STREAM;
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case NC_TPI_RAW:
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return SOCK_RAW;
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default:
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break;
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}
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return -1;
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}
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int
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__rpc_socktype2seman(int socktype)
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{
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switch (socktype) {
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case SOCK_DGRAM:
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return NC_TPI_CLTS;
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case SOCK_STREAM:
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return NC_TPI_COTS_ORD;
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case SOCK_RAW:
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return NC_TPI_RAW;
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default:
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break;
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}
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return -1;
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}
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/*
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* Returns the type of the network as defined in <rpc/nettype.h>
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* If nettype is NULL, it defaults to NETPATH.
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*/
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static int
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getnettype(const char *nettype)
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{
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int i;
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if ((nettype == NULL) || (nettype[0] == 0)) {
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return (_RPC_NETPATH); /* Default */
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}
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#if 0
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nettype = strlocase(nettype);
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#endif
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for (i = 0; _rpctypelist[i].name; i++)
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if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
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return (_rpctypelist[i].type);
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}
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return (_rpctypelist[i].type);
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}
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/*
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* For the given nettype (tcp or udp only), return the first structure found.
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* This should be freed by calling freenetconfigent()
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*/
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struct netconfig *
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__rpc_getconfip(const char *nettype)
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{
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char *netid;
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static char *netid_tcp = (char *) NULL;
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static char *netid_udp = (char *) NULL;
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struct netconfig *dummy;
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if (!netid_udp && !netid_tcp) {
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struct netconfig *nconf;
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void *confighandle;
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if (!(confighandle = setnetconfig())) {
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log(LOG_ERR, "rpc: failed to open " NETCONFIG);
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return (NULL);
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}
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while ((nconf = getnetconfig(confighandle)) != NULL) {
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if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
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if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
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netid_tcp = strdup(nconf->nc_netid,
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M_RPC);
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} else
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if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
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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;
|
|
}
|
|
|
|
/*
|
|
* Implement XDR-style API for RPC call.
|
|
*/
|
|
enum clnt_stat
|
|
clnt_call_private(
|
|
CLIENT *cl, /* client handle */
|
|
struct rpc_callextra *ext, /* call metadata */
|
|
rpcproc_t proc, /* procedure number */
|
|
xdrproc_t xargs, /* xdr routine for args */
|
|
void *argsp, /* pointer to args */
|
|
xdrproc_t xresults, /* xdr routine for results */
|
|
void *resultsp, /* pointer to results */
|
|
struct timeval utimeout) /* seconds to wait before giving up */
|
|
{
|
|
XDR xdrs;
|
|
struct mbuf *mreq;
|
|
struct mbuf *mrep;
|
|
enum clnt_stat stat;
|
|
|
|
MGET(mreq, M_WAIT, MT_DATA);
|
|
MCLGET(mreq, M_WAIT);
|
|
mreq->m_len = 0;
|
|
|
|
xdrmbuf_create(&xdrs, mreq, XDR_ENCODE);
|
|
if (!xargs(&xdrs, argsp)) {
|
|
m_freem(mreq);
|
|
return (RPC_CANTENCODEARGS);
|
|
}
|
|
XDR_DESTROY(&xdrs);
|
|
|
|
stat = CLNT_CALL_MBUF(cl, ext, proc, mreq, &mrep, utimeout);
|
|
m_freem(mreq);
|
|
|
|
if (stat == RPC_SUCCESS) {
|
|
xdrmbuf_create(&xdrs, mrep, XDR_DECODE);
|
|
if (!xresults(&xdrs, resultsp)) {
|
|
XDR_DESTROY(&xdrs);
|
|
return (RPC_CANTDECODERES);
|
|
}
|
|
XDR_DESTROY(&xdrs);
|
|
}
|
|
|
|
return (stat);
|
|
}
|
|
|
|
/*
|
|
* Bind a socket to a privileged IP port
|
|
*/
|
|
int
|
|
bindresvport(struct socket *so, struct sockaddr *sa)
|
|
{
|
|
int old, error, af;
|
|
bool_t freesa = FALSE;
|
|
struct sockaddr_in *sin;
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sin6;
|
|
#endif
|
|
struct sockopt opt;
|
|
int proto, portrange, portlow;
|
|
u_int16_t *portp;
|
|
socklen_t salen;
|
|
|
|
if (sa == NULL) {
|
|
error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
|
|
if (error)
|
|
return (error);
|
|
freesa = TRUE;
|
|
af = sa->sa_family;
|
|
salen = sa->sa_len;
|
|
memset(sa, 0, sa->sa_len);
|
|
} else {
|
|
af = sa->sa_family;
|
|
salen = sa->sa_len;
|
|
}
|
|
|
|
switch (af) {
|
|
case AF_INET:
|
|
proto = IPPROTO_IP;
|
|
portrange = IP_PORTRANGE;
|
|
portlow = IP_PORTRANGE_LOW;
|
|
sin = (struct sockaddr_in *)sa;
|
|
portp = &sin->sin_port;
|
|
break;
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
proto = IPPROTO_IPV6;
|
|
portrange = IPV6_PORTRANGE;
|
|
portlow = IPV6_PORTRANGE_LOW;
|
|
sin6 = (struct sockaddr_in6 *)sa;
|
|
portp = &sin6->sin6_port;
|
|
break;
|
|
#endif
|
|
default:
|
|
return (EPFNOSUPPORT);
|
|
}
|
|
|
|
sa->sa_family = af;
|
|
sa->sa_len = salen;
|
|
|
|
if (*portp == 0) {
|
|
bzero(&opt, sizeof(opt));
|
|
opt.sopt_dir = SOPT_GET;
|
|
opt.sopt_level = proto;
|
|
opt.sopt_name = portrange;
|
|
opt.sopt_val = &old;
|
|
opt.sopt_valsize = sizeof(old);
|
|
error = sogetopt(so, &opt);
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
|
|
opt.sopt_dir = SOPT_SET;
|
|
opt.sopt_val = &portlow;
|
|
error = sosetopt(so, &opt);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
error = sobind(so, sa, curthread);
|
|
|
|
if (*portp == 0) {
|
|
if (error) {
|
|
opt.sopt_dir = SOPT_SET;
|
|
opt.sopt_val = &old;
|
|
sosetopt(so, &opt);
|
|
}
|
|
}
|
|
out:
|
|
if (freesa)
|
|
free(sa, M_SONAME);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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);
|