584 lines
14 KiB
C
584 lines
14 KiB
C
/* $NetBSD: uipc_domain.c,v 1.76 2008/04/24 11:38:36 ad Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)uipc_domain.c 8.3 (Berkeley) 2/14/95
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: uipc_domain.c,v 1.76 2008/04/24 11:38:36 ad Exp $");
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/protosw.h>
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#include <sys/domain.h>
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#include <sys/mbuf.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/callout.h>
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#include <sys/queue.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <sys/un.h>
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#include <sys/unpcb.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/kauth.h>
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MALLOC_DECLARE(M_SOCKADDR);
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MALLOC_DEFINE(M_SOCKADDR, "sockaddr", "socket endpoints");
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void pffasttimo(void *);
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void pfslowtimo(void *);
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struct domainhead domains = STAILQ_HEAD_INITIALIZER(domains);
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static struct domain *domain_array[AF_MAX];
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callout_t pffasttimo_ch, pfslowtimo_ch;
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/*
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* Current time values for fast and slow timeouts. We can use u_int
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* relatively safely. The fast timer will roll over in 27 years and
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* the slow timer in 68 years.
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*/
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u_int pfslowtimo_now;
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u_int pffasttimo_now;
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void
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domaininit(void)
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{
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__link_set_decl(domains, struct domain);
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struct domain * const * dpp;
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struct domain *rt_domain = NULL;
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/*
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* Add all of the domains. Make sure the PF_ROUTE
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* domain is added last.
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*/
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__link_set_foreach(dpp, domains) {
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if ((*dpp)->dom_family == PF_ROUTE)
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rt_domain = *dpp;
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else
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domain_attach(*dpp);
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}
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if (rt_domain)
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domain_attach(rt_domain);
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callout_init(&pffasttimo_ch, CALLOUT_MPSAFE);
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callout_init(&pfslowtimo_ch, CALLOUT_MPSAFE);
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callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
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callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
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}
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void
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domain_attach(struct domain *dp)
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{
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const struct protosw *pr;
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STAILQ_INSERT_TAIL(&domains, dp, dom_link);
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if (dp->dom_family < __arraycount(domain_array))
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domain_array[dp->dom_family] = dp;
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if (dp->dom_init)
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(*dp->dom_init)();
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#ifdef MBUFTRACE
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if (dp->dom_mowner.mo_name[0] == '\0') {
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strncpy(dp->dom_mowner.mo_name, dp->dom_name,
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sizeof(dp->dom_mowner.mo_name));
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MOWNER_ATTACH(&dp->dom_mowner);
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}
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#endif
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
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if (pr->pr_init)
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(*pr->pr_init)();
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}
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if (max_linkhdr < 16) /* XXX */
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max_linkhdr = 16;
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max_hdr = max_linkhdr + max_protohdr;
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max_datalen = MHLEN - max_hdr;
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}
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struct domain *
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pffinddomain(int family)
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{
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struct domain *dp;
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if (family < __arraycount(domain_array) && domain_array[family] != NULL)
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return domain_array[family];
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DOMAIN_FOREACH(dp)
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if (dp->dom_family == family)
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return (dp);
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return (NULL);
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}
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const struct protosw *
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pffindtype(int family, int type)
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{
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struct domain *dp;
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const struct protosw *pr;
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dp = pffinddomain(family);
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if (dp == NULL)
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return (NULL);
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
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if (pr->pr_type && pr->pr_type == type)
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return (pr);
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return (NULL);
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}
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const struct protosw *
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pffindproto(int family, int protocol, int type)
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{
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struct domain *dp;
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const struct protosw *pr;
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const struct protosw *maybe = NULL;
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if (family == 0)
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return (NULL);
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dp = pffinddomain(family);
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if (dp == NULL)
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return (NULL);
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for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
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if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
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return (pr);
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if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
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pr->pr_protocol == 0 && maybe == NULL)
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maybe = pr;
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}
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return (maybe);
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}
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void *
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sockaddr_addr(struct sockaddr *sa, socklen_t *slenp)
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{
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const struct domain *dom;
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if ((dom = pffinddomain(sa->sa_family)) == NULL ||
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dom->dom_sockaddr_addr == NULL)
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return NULL;
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return (*dom->dom_sockaddr_addr)(sa, slenp);
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}
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const void *
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sockaddr_const_addr(const struct sockaddr *sa, socklen_t *slenp)
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{
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const struct domain *dom;
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if ((dom = pffinddomain(sa->sa_family)) == NULL ||
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dom->dom_sockaddr_const_addr == NULL)
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return NULL;
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return (*dom->dom_sockaddr_const_addr)(sa, slenp);
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}
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const struct sockaddr *
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sockaddr_any(const struct sockaddr *sa)
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{
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const struct domain *dom;
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if ((dom = pffinddomain(sa->sa_family)) == NULL)
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return NULL;
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return dom->dom_sa_any;
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}
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const void *
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sockaddr_anyaddr(const struct sockaddr *sa, socklen_t *slenp)
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{
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const struct sockaddr *any;
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if ((any = sockaddr_any(sa)) == NULL)
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return NULL;
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return sockaddr_const_addr(any, slenp);
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}
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struct sockaddr *
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sockaddr_alloc(sa_family_t af, socklen_t socklen, int flags)
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{
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struct sockaddr *sa;
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socklen_t reallen = MAX(socklen, offsetof(struct sockaddr, sa_data[0]));
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if ((sa = malloc(reallen, M_SOCKADDR, flags)) == NULL)
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return NULL;
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sa->sa_family = af;
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sa->sa_len = reallen;
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return sa;
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}
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struct sockaddr *
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sockaddr_copy(struct sockaddr *dst, socklen_t socklen,
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const struct sockaddr *src)
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{
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if (__predict_false(socklen < src->sa_len)) {
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panic("%s: source too long, %d < %d bytes", __func__, socklen,
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src->sa_len);
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}
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return memcpy(dst, src, src->sa_len);
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}
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int
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sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2)
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{
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int len, rc;
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struct domain *dom;
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if (sa1->sa_family != sa2->sa_family)
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return sa1->sa_family - sa2->sa_family;
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dom = pffinddomain(sa1->sa_family);
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if (dom != NULL && dom->dom_sockaddr_cmp != NULL)
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return (*dom->dom_sockaddr_cmp)(sa1, sa2);
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len = MIN(sa1->sa_len, sa2->sa_len);
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if (dom == NULL || dom->dom_sa_cmplen == 0) {
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if ((rc = memcmp(sa1, sa2, len)) != 0)
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return rc;
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return sa1->sa_len - sa2->sa_len;
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}
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if ((rc = memcmp((const char *)sa1 + dom->dom_sa_cmpofs,
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(const char *)sa2 + dom->dom_sa_cmpofs,
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MIN(dom->dom_sa_cmplen,
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len - MIN(len, dom->dom_sa_cmpofs)))) != 0)
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return rc;
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return MIN(dom->dom_sa_cmplen + dom->dom_sa_cmpofs, sa1->sa_len) -
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MIN(dom->dom_sa_cmplen + dom->dom_sa_cmpofs, sa2->sa_len);
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}
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struct sockaddr *
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sockaddr_dup(const struct sockaddr *src, int flags)
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{
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struct sockaddr *dst;
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if ((dst = sockaddr_alloc(src->sa_family, src->sa_len, flags)) == NULL)
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return NULL;
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return sockaddr_copy(dst, dst->sa_len, src);
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}
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void
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sockaddr_free(struct sockaddr *sa)
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{
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free(sa, M_SOCKADDR);
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}
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/*
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* sysctl helper to stuff PF_LOCAL pcbs into sysctl structures
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*/
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static void
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sysctl_dounpcb(struct kinfo_pcb *pcb, const struct socket *so)
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{
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struct unpcb *unp = sotounpcb(so);
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struct sockaddr_un *un = unp->unp_addr;
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memset(pcb, 0, sizeof(*pcb));
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pcb->ki_family = so->so_proto->pr_domain->dom_family;
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pcb->ki_type = so->so_proto->pr_type;
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pcb->ki_protocol = so->so_proto->pr_protocol;
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pcb->ki_pflags = unp->unp_flags;
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pcb->ki_pcbaddr = PTRTOUINT64(unp);
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/* pcb->ki_ppcbaddr = unp has no ppcb... */
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pcb->ki_sockaddr = PTRTOUINT64(so);
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pcb->ki_sostate = so->so_state;
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/* pcb->ki_prstate = unp has no state... */
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pcb->ki_rcvq = so->so_rcv.sb_cc;
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pcb->ki_sndq = so->so_snd.sb_cc;
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un = (struct sockaddr_un *)&pcb->ki_src;
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/*
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* local domain sockets may bind without having a local
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* endpoint. bleah!
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*/
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if (unp->unp_addr != NULL) {
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un->sun_len = unp->unp_addr->sun_len;
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un->sun_family = unp->unp_addr->sun_family;
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strlcpy(un->sun_path, unp->unp_addr->sun_path,
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sizeof(pcb->ki_s));
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}
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else {
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un->sun_len = offsetof(struct sockaddr_un, sun_path);
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un->sun_family = pcb->ki_family;
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}
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if (unp->unp_conn != NULL) {
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un = (struct sockaddr_un *)&pcb->ki_dst;
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if (unp->unp_conn->unp_addr != NULL) {
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un->sun_len = unp->unp_conn->unp_addr->sun_len;
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un->sun_family = unp->unp_conn->unp_addr->sun_family;
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un->sun_family = unp->unp_conn->unp_addr->sun_family;
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strlcpy(un->sun_path, unp->unp_conn->unp_addr->sun_path,
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sizeof(pcb->ki_d));
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}
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else {
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un->sun_len = offsetof(struct sockaddr_un, sun_path);
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un->sun_family = pcb->ki_family;
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}
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}
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pcb->ki_inode = unp->unp_ino;
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pcb->ki_vnode = PTRTOUINT64(unp->unp_vnode);
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pcb->ki_conn = PTRTOUINT64(unp->unp_conn);
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pcb->ki_refs = PTRTOUINT64(unp->unp_refs);
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pcb->ki_nextref = PTRTOUINT64(unp->unp_nextref);
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}
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static int
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sysctl_unpcblist(SYSCTLFN_ARGS)
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{
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struct file *fp, *dfp, *np;
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struct socket *so;
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struct kinfo_pcb pcb;
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char *dp;
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u_int op, arg;
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size_t len, needed, elem_size, out_size;
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int error, elem_count, pf, type, pf2;
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if (namelen == 1 && name[0] == CTL_QUERY)
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return (sysctl_query(SYSCTLFN_CALL(rnode)));
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if (namelen != 4)
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return (EINVAL);
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if (oldp != NULL) {
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len = *oldlenp;
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elem_size = name[2];
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elem_count = name[3];
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if (elem_size != sizeof(pcb))
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return EINVAL;
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} else {
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len = 0;
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elem_size = sizeof(pcb);
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elem_count = INT_MAX;
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}
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error = 0;
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dp = oldp;
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op = name[0];
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arg = name[1];
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out_size = elem_size;
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needed = 0;
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if (name - oname != 4)
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return (EINVAL);
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pf = oname[1];
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type = oname[2];
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pf2 = (oldp == NULL) ? 0 : pf;
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/*
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* allocate dummy file descriptor to make position in list.
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*/
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sysctl_unlock();
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if ((dfp = fgetdummy()) == NULL) {
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sysctl_relock();
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return ENOMEM;
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}
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/*
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* there's no "list" of local domain sockets, so we have
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* to walk the file list looking for them. :-/
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*/
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mutex_enter(&filelist_lock);
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LIST_FOREACH(fp, &filehead, f_list) {
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np = LIST_NEXT(fp, f_list);
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if (fp->f_count == 0 || fp->f_type != DTYPE_SOCKET ||
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fp->f_data == NULL)
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continue;
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if (kauth_authorize_generic(l->l_cred,
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KAUTH_GENERIC_CANSEE, fp->f_cred) != 0)
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continue;
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so = (struct socket *)fp->f_data;
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if (so->so_type != type)
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continue;
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if (so->so_proto->pr_domain->dom_family != pf)
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continue;
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if (len >= elem_size && elem_count > 0) {
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mutex_enter(&fp->f_lock);
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fp->f_count++;
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mutex_exit(&fp->f_lock);
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LIST_INSERT_AFTER(fp, dfp, f_list);
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mutex_exit(&filelist_lock);
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sysctl_dounpcb(&pcb, so);
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error = copyout(&pcb, dp, out_size);
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closef(fp);
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mutex_enter(&filelist_lock);
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np = LIST_NEXT(dfp, f_list);
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LIST_REMOVE(dfp, f_list);
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if (error)
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break;
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dp += elem_size;
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len -= elem_size;
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}
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if (elem_count > 0) {
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needed += elem_size;
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if (elem_count != INT_MAX)
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elem_count--;
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}
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}
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mutex_exit(&filelist_lock);
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fputdummy(dfp);
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*oldlenp = needed;
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if (oldp == NULL)
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*oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb);
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sysctl_relock();
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return (error);
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}
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SYSCTL_SETUP(sysctl_net_setup, "sysctl net subtree setup")
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{
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "net", NULL,
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NULL, 0, NULL, 0,
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CTL_NET, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "local",
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SYSCTL_DESCR("PF_LOCAL related settings"),
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NULL, 0, NULL, 0,
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CTL_NET, PF_LOCAL, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "stream",
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SYSCTL_DESCR("SOCK_STREAM settings"),
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NULL, 0, NULL, 0,
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CTL_NET, PF_LOCAL, SOCK_STREAM, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_NODE, "dgram",
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SYSCTL_DESCR("SOCK_DGRAM settings"),
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NULL, 0, NULL, 0,
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CTL_NET, PF_LOCAL, SOCK_DGRAM, CTL_EOL);
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sysctl_createv(clog, 0, NULL, NULL,
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CTLFLAG_PERMANENT,
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CTLTYPE_STRUCT, "pcblist",
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SYSCTL_DESCR("SOCK_STREAM protocol control block list"),
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sysctl_unpcblist, 0, NULL, 0,
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CTL_NET, PF_LOCAL, SOCK_STREAM, CTL_CREATE, CTL_EOL);
|
|
sysctl_createv(clog, 0, NULL, NULL,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_STRUCT, "pcblist",
|
|
SYSCTL_DESCR("SOCK_DGRAM protocol control block list"),
|
|
sysctl_unpcblist, 0, NULL, 0,
|
|
CTL_NET, PF_LOCAL, SOCK_DGRAM, CTL_CREATE, CTL_EOL);
|
|
}
|
|
|
|
void
|
|
pfctlinput(int cmd, const struct sockaddr *sa)
|
|
{
|
|
struct domain *dp;
|
|
const struct protosw *pr;
|
|
|
|
DOMAIN_FOREACH(dp) {
|
|
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
|
|
if (pr->pr_ctlinput != NULL)
|
|
(*pr->pr_ctlinput)(cmd, sa, NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
pfctlinput2(int cmd, const struct sockaddr *sa, void *ctlparam)
|
|
{
|
|
struct domain *dp;
|
|
const struct protosw *pr;
|
|
|
|
if (sa == NULL)
|
|
return;
|
|
|
|
DOMAIN_FOREACH(dp) {
|
|
/*
|
|
* the check must be made by xx_ctlinput() anyways, to
|
|
* make sure we use data item pointed to by ctlparam in
|
|
* correct way. the following check is made just for safety.
|
|
*/
|
|
if (dp->dom_family != sa->sa_family)
|
|
continue;
|
|
|
|
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
|
|
if (pr->pr_ctlinput != NULL)
|
|
(*pr->pr_ctlinput)(cmd, sa, ctlparam);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
pfslowtimo(void *arg)
|
|
{
|
|
struct domain *dp;
|
|
const struct protosw *pr;
|
|
|
|
pfslowtimo_now++;
|
|
|
|
DOMAIN_FOREACH(dp) {
|
|
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
|
|
if (pr->pr_slowtimo)
|
|
(*pr->pr_slowtimo)();
|
|
}
|
|
callout_schedule(&pfslowtimo_ch, hz / 2);
|
|
}
|
|
|
|
void
|
|
pffasttimo(void *arg)
|
|
{
|
|
struct domain *dp;
|
|
const struct protosw *pr;
|
|
|
|
pffasttimo_now++;
|
|
|
|
DOMAIN_FOREACH(dp) {
|
|
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
|
|
if (pr->pr_fasttimo)
|
|
(*pr->pr_fasttimo)();
|
|
}
|
|
callout_schedule(&pffasttimo_ch, hz / 5);
|
|
}
|