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NetBSD/sys/kern/uipc_domain.c
dyoung 5493f188c7 KNF: de-__P, bzero -> memset, bcmp -> memcmp. Remove extraneous 
parentheses in return statements.

Cosmetic: don't open-code TAILQ_FOREACH().

Cosmetic: change types of variables to avoid oodles of casts: in
   in6_src.c, avoid casts by changing several route_in6 pointers
   to struct route pointers.  Remove unnecessary casts to caddr_t
   elsewhere.

Pave the way for eliminating address family-specific route caches:
   soon, struct route will not embed a sockaddr, but it will hold
   a reference to an external sockaddr, instead.  We will set the
   destination sockaddr using rtcache_setdst().  (I created a stub
   for it, but it isn't used anywhere, yet.)  rtcache_free() will
   free the sockaddr.  I have extracted from rtcache_free() a helper
   subroutine, rtcache_clear().  rtcache_clear() will "forget" a
   cached route, but it will not forget the destination by releasing
   the sockaddr.  I use rtcache_clear() instead of rtcache_free()
   in rtcache_update(), because rtcache_update() is not supposed
   to forget the destination.

Constify:

   1 Introduce const accessor for route->ro_dst, rtcache_getdst().

   2 Constify the 'dst' argument to ifnet->if_output().  This
     led me to constify a lot of code called by output routines.

   3 Constify the sockaddr argument to protosw->pr_ctlinput.  This
     led me to constify a lot of code called by ctlinput routines.

   4 Introduce const macros for converting from a generic sockaddr
     to family-specific sockaddrs, e.g., sockaddr_in: satocsin6,
     satocsin, et cetera.
2007-02-17 22:34:07 +00:00

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/* $NetBSD: uipc_domain.c,v 1.63 2007/02/17 22:34:07 dyoung Exp $ */
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)uipc_domain.c 8.3 (Berkeley) 2/14/95
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uipc_domain.c,v 1.63 2007/02/17 22:34:07 dyoung Exp $");
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/time.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/queue.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <sys/unpcb.h>
#include <sys/file.h>
#include <sys/kauth.h>
void pffasttimo(void *);
void pfslowtimo(void *);
struct domainhead domains = STAILQ_HEAD_INITIALIZER(domains);
struct callout pffasttimo_ch, pfslowtimo_ch;
/*
* Current time values for fast and slow timeouts. We can use u_int
* relatively safely. The fast timer will roll over in 27 years and
* the slow timer in 68 years.
*/
u_int pfslowtimo_now;
u_int pffasttimo_now;
void
domaininit(void)
{
__link_set_decl(domains, struct domain);
struct domain * const * dpp;
struct domain *rt_domain = NULL;
/*
* Add all of the domains. Make sure the PF_ROUTE
* domain is added last.
*/
__link_set_foreach(dpp, domains) {
if ((*dpp)->dom_family == PF_ROUTE)
rt_domain = *dpp;
else
domain_attach(*dpp);
}
if (rt_domain)
domain_attach(rt_domain);
callout_init(&pffasttimo_ch);
callout_init(&pfslowtimo_ch);
callout_reset(&pffasttimo_ch, 1, pffasttimo, NULL);
callout_reset(&pfslowtimo_ch, 1, pfslowtimo, NULL);
}
void
domain_attach(struct domain *dp)
{
const struct protosw *pr;
STAILQ_INSERT_TAIL(&domains, dp, dom_link);
if (dp->dom_init)
(*dp->dom_init)();
#ifdef MBUFTRACE
if (dp->dom_mowner.mo_name[0] == '\0') {
strncpy(dp->dom_mowner.mo_name, dp->dom_name,
sizeof(dp->dom_mowner.mo_name));
MOWNER_ATTACH(&dp->dom_mowner);
}
#endif
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
if (pr->pr_init)
(*pr->pr_init)();
}
if (max_linkhdr < 16) /* XXX */
max_linkhdr = 16;
max_hdr = max_linkhdr + max_protohdr;
max_datalen = MHLEN - max_hdr;
}
struct domain *
pffinddomain(int family)
{
struct domain *dp;
DOMAIN_FOREACH(dp)
if (dp->dom_family == family)
return (dp);
return (NULL);
}
const struct protosw *
pffindtype(int family, int type)
{
struct domain *dp;
const struct protosw *pr;
dp = pffinddomain(family);
if (dp == NULL)
return (NULL);
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++)
if (pr->pr_type && pr->pr_type == type)
return (pr);
return (NULL);
}
const struct protosw *
pffindproto(int family, int protocol, int type)
{
struct domain *dp;
const struct protosw *pr;
const struct protosw *maybe = NULL;
if (family == 0)
return (NULL);
dp = pffinddomain(family);
if (dp == NULL)
return (NULL);
for (pr = dp->dom_protosw; pr < dp->dom_protoswNPROTOSW; pr++) {
if ((pr->pr_protocol == protocol) && (pr->pr_type == type))
return (pr);
if (type == SOCK_RAW && pr->pr_type == SOCK_RAW &&
pr->pr_protocol == 0 && maybe == NULL)
maybe = pr;
}
return (maybe);
}
/*
* sysctl helper to stuff PF_LOCAL pcbs into sysctl structures
*/
static void
sysctl_dounpcb(struct kinfo_pcb *pcb, const struct socket *so)
{
struct unpcb *unp = sotounpcb(so);
struct sockaddr_un *un = unp->unp_addr;
memset(pcb, 0, sizeof(*pcb));
pcb->ki_family = so->so_proto->pr_domain->dom_family;
pcb->ki_type = so->so_proto->pr_type;
pcb->ki_protocol = so->so_proto->pr_protocol;
pcb->ki_pflags = unp->unp_flags;
pcb->ki_pcbaddr = PTRTOUINT64(unp);
/* pcb->ki_ppcbaddr = unp has no ppcb... */
pcb->ki_sockaddr = PTRTOUINT64(so);
pcb->ki_sostate = so->so_state;
/* pcb->ki_prstate = unp has no state... */
pcb->ki_rcvq = so->so_rcv.sb_cc;
pcb->ki_sndq = so->so_snd.sb_cc;
un = (struct sockaddr_un *)&pcb->ki_src;
/*
* local domain sockets may bind without having a local
* endpoint. bleah!
*/
if (unp->unp_addr != NULL) {
un->sun_len = unp->unp_addr->sun_len;
un->sun_family = unp->unp_addr->sun_family;
strlcpy(un->sun_path, unp->unp_addr->sun_path,
sizeof(pcb->ki_s));
}
else {
un->sun_len = offsetof(struct sockaddr_un, sun_path);
un->sun_family = pcb->ki_family;
}
if (unp->unp_conn != NULL) {
un = (struct sockaddr_un *)&pcb->ki_dst;
if (unp->unp_conn->unp_addr != NULL) {
un->sun_len = unp->unp_conn->unp_addr->sun_len;
un->sun_family = unp->unp_conn->unp_addr->sun_family;
un->sun_family = unp->unp_conn->unp_addr->sun_family;
strlcpy(un->sun_path, unp->unp_conn->unp_addr->sun_path,
sizeof(pcb->ki_d));
}
else {
un->sun_len = offsetof(struct sockaddr_un, sun_path);
un->sun_family = pcb->ki_family;
}
}
pcb->ki_inode = unp->unp_ino;
pcb->ki_vnode = PTRTOUINT64(unp->unp_vnode);
pcb->ki_conn = PTRTOUINT64(unp->unp_conn);
pcb->ki_refs = PTRTOUINT64(unp->unp_refs);
pcb->ki_nextref = PTRTOUINT64(unp->unp_nextref);
}
static int
sysctl_unpcblist(SYSCTLFN_ARGS)
{
struct file *fp;
struct socket *so;
struct kinfo_pcb pcb;
char *dp;
u_int op, arg;
size_t len, needed, elem_size, out_size;
int error, elem_count, pf, type, pf2;
if (namelen == 1 && name[0] == CTL_QUERY)
return (sysctl_query(SYSCTLFN_CALL(rnode)));
if (namelen != 4)
return (EINVAL);
if (oldp != NULL) {
len = *oldlenp;
elem_size = name[2];
elem_count = name[3];
if (elem_size != sizeof(pcb))
return EINVAL;
} else {
len = 0;
elem_size = sizeof(pcb);
elem_count = INT_MAX;
}
error = 0;
dp = oldp;
op = name[0];
arg = name[1];
out_size = elem_size;
needed = 0;
if (name - oname != 4)
return (EINVAL);
pf = oname[1];
type = oname[2];
pf2 = (oldp == NULL) ? 0 : pf;
/*
* there's no "list" of local domain sockets, so we have
* to walk the file list looking for them. :-/
*/
LIST_FOREACH(fp, &filehead, f_list) {
if (kauth_authorize_generic(l->l_cred,
KAUTH_GENERIC_CANSEE, fp->f_cred) != 0)
continue;
if (fp->f_type != DTYPE_SOCKET)
continue;
so = (struct socket *)fp->f_data;
if (so->so_type != type)
continue;
if (so->so_proto->pr_domain->dom_family != pf)
continue;
if (len >= elem_size && elem_count > 0) {
sysctl_dounpcb(&pcb, so);
error = copyout(&pcb, dp, out_size);
if (error)
break;
dp += elem_size;
len -= elem_size;
}
if (elem_count > 0) {
needed += elem_size;
if (elem_count != INT_MAX)
elem_count--;
}
}
*oldlenp = needed;
if (oldp == NULL)
*oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb);
return (error);
}
SYSCTL_SETUP(sysctl_net_setup, "sysctl net subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "net", NULL,
NULL, 0, NULL, 0,
CTL_NET, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "local",
SYSCTL_DESCR("PF_LOCAL related settings"),
NULL, 0, NULL, 0,
CTL_NET, PF_LOCAL, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "stream",
SYSCTL_DESCR("SOCK_STREAM settings"),
NULL, 0, NULL, 0,
CTL_NET, PF_LOCAL, SOCK_STREAM, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "dgram",
SYSCTL_DESCR("SOCK_DGRAM settings"),
NULL, 0, NULL, 0,
CTL_NET, PF_LOCAL, SOCK_DGRAM, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "pcblist",
SYSCTL_DESCR("SOCK_STREAM protocol control block list"),
sysctl_unpcblist, 0, NULL, 0,
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_reset(&pfslowtimo_ch, hz / 2, pfslowtimo, NULL);
}
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_reset(&pffasttimo_ch, hz / 5, pffasttimo, NULL);
}
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