NetBSD-5.0.2/sys/netatalk/ddp_usrreq.c
/* $NetBSD: ddp_usrreq.c,v 1.33 2008/05/04 07:22:14 thorpej Exp $ */
/*
* Copyright (c) 1990,1991 Regents of The University of Michigan.
* All Rights Reserved.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation, and that the name of The University
* of Michigan not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. This software is supplied as is without expressed or
* implied warranties of any kind.
*
* This product includes software developed by the University of
* California, Berkeley and its contributors.
*
* Research Systems Unix Group
* The University of Michigan
* c/o Wesley Craig
* 535 W. William Street
* Ann Arbor, Michigan
* +1-313-764-2278
* netatalk@umich.edu
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ddp_usrreq.c,v 1.33 2008/05/04 07:22:14 thorpej Exp $");
#include "opt_mbuftrace.h"
#include <sys/param.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/mbuf.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/kauth.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/route.h>
#include <net/if_ether.h>
#include <net/net_stats.h>
#include <netinet/in.h>
#include <netatalk/at.h>
#include <netatalk/at_var.h>
#include <netatalk/ddp_var.h>
#include <netatalk/ddp_private.h>
#include <netatalk/aarp.h>
#include <netatalk/at_extern.h>
static void at_pcbdisconnect __P((struct ddpcb *));
static void at_sockaddr __P((struct ddpcb *, struct mbuf *));
static int at_pcbsetaddr __P((struct ddpcb *, struct mbuf *, struct lwp *));
static int at_pcbconnect __P((struct ddpcb *, struct mbuf *, struct lwp *));
static void at_pcbdetach __P((struct socket *, struct ddpcb *));
static int at_pcballoc __P((struct socket *));
struct ifqueue atintrq1, atintrq2;
struct ddpcb *ddp_ports[ATPORT_LAST];
struct ddpcb *ddpcb = NULL;
percpu_t *ddpstat_percpu;
struct at_ifaddrhead at_ifaddr; /* Here as inited in this file */
u_long ddp_sendspace = DDP_MAXSZ; /* Max ddp size + 1 (ddp_type) */
u_long ddp_recvspace = 25 * (587 + sizeof(struct sockaddr_at));
#ifdef MBUFTRACE
struct mowner atalk_rx_mowner = MOWNER_INIT("atalk", "rx");
struct mowner atalk_tx_mowner = MOWNER_INIT("atalk", "tx");
#endif
/* ARGSUSED */
int
ddp_usrreq(so, req, m, addr, rights, l)
struct socket *so;
int req;
struct mbuf *m;
struct mbuf *addr;
struct mbuf *rights;
struct lwp *l;
{
struct ddpcb *ddp;
int error = 0;
ddp = sotoddpcb(so);
if (req == PRU_CONTROL) {
return (at_control((long) m, (void *) addr,
(struct ifnet *) rights, l));
}
if (req == PRU_PURGEIF) {
mutex_enter(softnet_lock);
at_purgeif((struct ifnet *) rights);
mutex_exit(softnet_lock);
return (0);
}
if (rights && rights->m_len) {
error = EINVAL;
goto release;
}
if (ddp == NULL && req != PRU_ATTACH) {
error = EINVAL;
goto release;
}
switch (req) {
case PRU_ATTACH:
if (ddp != NULL) {
error = EINVAL;
break;
}
sosetlock(so);
if ((error = at_pcballoc(so)) != 0) {
break;
}
error = soreserve(so, ddp_sendspace, ddp_recvspace);
break;
case PRU_DETACH:
at_pcbdetach(so, ddp);
break;
case PRU_BIND:
error = at_pcbsetaddr(ddp, addr, l);
break;
case PRU_SOCKADDR:
at_sockaddr(ddp, addr);
break;
case PRU_CONNECT:
if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
error = EISCONN;
break;
}
error = at_pcbconnect(ddp, addr, l);
if (error == 0)
soisconnected(so);
break;
case PRU_DISCONNECT:
if (ddp->ddp_fsat.sat_addr.s_node == ATADDR_ANYNODE) {
error = ENOTCONN;
break;
}
at_pcbdisconnect(ddp);
soisdisconnected(so);
break;
case PRU_SHUTDOWN:
socantsendmore(so);
break;
case PRU_SEND:{
int s = 0;
if (addr) {
if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
error = EISCONN;
break;
}
s = splnet();
error = at_pcbconnect(ddp, addr, l);
if (error) {
splx(s);
break;
}
} else {
if (ddp->ddp_fsat.sat_port == ATADDR_ANYPORT) {
error = ENOTCONN;
break;
}
}
error = ddp_output(m, ddp);
m = NULL;
if (addr) {
at_pcbdisconnect(ddp);
splx(s);
}
}
break;
case PRU_ABORT:
soisdisconnected(so);
at_pcbdetach(so, ddp);
break;
case PRU_LISTEN:
case PRU_CONNECT2:
case PRU_ACCEPT:
case PRU_SENDOOB:
case PRU_FASTTIMO:
case PRU_SLOWTIMO:
case PRU_PROTORCV:
case PRU_PROTOSEND:
error = EOPNOTSUPP;
break;
case PRU_RCVD:
case PRU_RCVOOB:
/*
* Don't mfree. Good architecture...
*/
return (EOPNOTSUPP);
case PRU_SENSE:
/*
* 1. Don't return block size.
* 2. Don't mfree.
*/
return (0);
default:
error = EOPNOTSUPP;
}
release:
if (m != NULL) {
m_freem(m);
}
return (error);
}
static void
at_sockaddr(ddp, addr)
struct ddpcb *ddp;
struct mbuf *addr;
{
struct sockaddr_at *sat;
addr->m_len = sizeof(struct sockaddr_at);
sat = mtod(addr, struct sockaddr_at *);
*sat = ddp->ddp_lsat;
}
static int
at_pcbsetaddr(ddp, addr, l)
struct ddpcb *ddp;
struct mbuf *addr;
struct lwp *l;
{
struct sockaddr_at lsat, *sat;
struct at_ifaddr *aa;
struct ddpcb *ddpp;
if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT) { /* shouldn't be bound */
return (EINVAL);
}
if (addr != 0) { /* validate passed address */
sat = mtod(addr, struct sockaddr_at *);
if (addr->m_len != sizeof(*sat))
return (EINVAL);
if (sat->sat_family != AF_APPLETALK)
return (EAFNOSUPPORT);
if (sat->sat_addr.s_node != ATADDR_ANYNODE ||
sat->sat_addr.s_net != ATADDR_ANYNET) {
TAILQ_FOREACH(aa, &at_ifaddr, aa_list) {
if ((sat->sat_addr.s_net ==
AA_SAT(aa)->sat_addr.s_net) &&
(sat->sat_addr.s_node ==
AA_SAT(aa)->sat_addr.s_node))
break;
}
if (!aa)
return (EADDRNOTAVAIL);
}
if (sat->sat_port != ATADDR_ANYPORT) {
if (sat->sat_port < ATPORT_FIRST ||
sat->sat_port >= ATPORT_LAST)
return (EINVAL);
if (sat->sat_port < ATPORT_RESERVED && l &&
kauth_authorize_generic(l->l_cred,
KAUTH_GENERIC_ISSUSER, NULL))
return (EACCES);
}
} else {
bzero((void *) & lsat, sizeof(struct sockaddr_at));
lsat.sat_len = sizeof(struct sockaddr_at);
lsat.sat_addr.s_node = ATADDR_ANYNODE;
lsat.sat_addr.s_net = ATADDR_ANYNET;
lsat.sat_family = AF_APPLETALK;
sat = &lsat;
}
if (sat->sat_addr.s_node == ATADDR_ANYNODE &&
sat->sat_addr.s_net == ATADDR_ANYNET) {
if (TAILQ_EMPTY(&at_ifaddr))
return EADDRNOTAVAIL;
sat->sat_addr = AA_SAT(TAILQ_FIRST(&at_ifaddr))->sat_addr;
}
ddp->ddp_lsat = *sat;
/*
* Choose port.
*/
if (sat->sat_port == ATADDR_ANYPORT) {
for (sat->sat_port = ATPORT_RESERVED;
sat->sat_port < ATPORT_LAST; sat->sat_port++) {
if (ddp_ports[sat->sat_port - 1] == 0)
break;
}
if (sat->sat_port == ATPORT_LAST) {
return (EADDRNOTAVAIL);
}
ddp->ddp_lsat.sat_port = sat->sat_port;
ddp_ports[sat->sat_port - 1] = ddp;
} else {
for (ddpp = ddp_ports[sat->sat_port - 1]; ddpp;
ddpp = ddpp->ddp_pnext) {
if (ddpp->ddp_lsat.sat_addr.s_net ==
sat->sat_addr.s_net &&
ddpp->ddp_lsat.sat_addr.s_node ==
sat->sat_addr.s_node)
break;
}
if (ddpp != NULL)
return (EADDRINUSE);
ddp->ddp_pnext = ddp_ports[sat->sat_port - 1];
ddp_ports[sat->sat_port - 1] = ddp;
if (ddp->ddp_pnext)
ddp->ddp_pnext->ddp_pprev = ddp;
}
return 0;
}
static int
at_pcbconnect(ddp, addr, l)
struct ddpcb *ddp;
struct mbuf *addr;
struct lwp *l;
{
struct rtentry *rt;
const struct sockaddr_at *cdst;
struct sockaddr_at *sat = mtod(addr, struct sockaddr_at *);
struct route *ro;
struct at_ifaddr *aa;
struct ifnet *ifp;
u_short hintnet = 0, net;
if (addr->m_len != sizeof(*sat))
return EINVAL;
if (sat->sat_family != AF_APPLETALK) {
return EAFNOSUPPORT;
}
/*
* Under phase 2, network 0 means "the network". We take "the
* network" to mean the network the control block is bound to.
* If the control block is not bound, there is an error.
*/
if (sat->sat_addr.s_net == ATADDR_ANYNET
&& sat->sat_addr.s_node != ATADDR_ANYNODE) {
if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) {
return EADDRNOTAVAIL;
}
hintnet = ddp->ddp_lsat.sat_addr.s_net;
}
ro = &ddp->ddp_route;
/*
* If we've got an old route for this pcb, check that it is valid.
* If we've changed our address, we may have an old "good looking"
* route here. Attempt to detect it.
*/
if ((rt = rtcache_validate(ro)) != NULL ||
(rt = rtcache_update(ro, 1)) != NULL) {
if (hintnet) {
net = hintnet;
} else {
net = sat->sat_addr.s_net;
}
if ((ifp = rt->rt_ifp) != NULL) {
TAILQ_FOREACH(aa, &at_ifaddr, aa_list) {
if (aa->aa_ifp == ifp &&
ntohs(net) >= ntohs(aa->aa_firstnet) &&
ntohs(net) <= ntohs(aa->aa_lastnet)) {
break;
}
}
} else
aa = NULL;
cdst = satocsat(rtcache_getdst(ro));
if (aa == NULL || (cdst->sat_addr.s_net !=
(hintnet ? hintnet : sat->sat_addr.s_net) ||
cdst->sat_addr.s_node != sat->sat_addr.s_node)) {
rtcache_free(ro);
rt = NULL;
}
}
/*
* If we've got no route for this interface, try to find one.
*/
if (rt == NULL) {
union {
struct sockaddr dst;
struct sockaddr_at dsta;
} u;
sockaddr_at_init(&u.dsta, &sat->sat_addr, 0);
if (hintnet)
u.dsta.sat_addr.s_net = hintnet;
rt = rtcache_lookup(ro, &u.dst);
}
/*
* Make sure any route that we have has a valid interface.
*/
if (rt != NULL && (ifp = rt->rt_ifp) != NULL) {
TAILQ_FOREACH(aa, &at_ifaddr, aa_list) {
if (aa->aa_ifp == ifp)
break;
}
} else
aa = NULL;
if (aa == NULL)
return ENETUNREACH;
ddp->ddp_fsat = *sat;
if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT)
return at_pcbsetaddr(ddp, NULL, l);
return 0;
}
static void
at_pcbdisconnect(ddp)
struct ddpcb *ddp;
{
ddp->ddp_fsat.sat_addr.s_net = ATADDR_ANYNET;
ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE;
ddp->ddp_fsat.sat_port = ATADDR_ANYPORT;
}
static int
at_pcballoc(so)
struct socket *so;
{
struct ddpcb *ddp;
MALLOC(ddp, struct ddpcb *, sizeof(*ddp), M_PCB, M_WAITOK|M_ZERO);
if (!ddp)
panic("at_pcballoc");
ddp->ddp_lsat.sat_port = ATADDR_ANYPORT;
ddp->ddp_next = ddpcb;
ddp->ddp_prev = NULL;
ddp->ddp_pprev = NULL;
ddp->ddp_pnext = NULL;
if (ddpcb) {
ddpcb->ddp_prev = ddp;
}
ddpcb = ddp;
ddp->ddp_socket = so;
so->so_pcb = (void *) ddp;
#ifdef MBUFTRACE
so->so_rcv.sb_mowner = &atalk_rx_mowner;
so->so_snd.sb_mowner = &atalk_tx_mowner;
#endif
return 0;
}
static void
at_pcbdetach(so, ddp)
struct socket *so;
struct ddpcb *ddp;
{
soisdisconnected(so);
so->so_pcb = 0;
/* sofree drops the lock */
sofree(so);
mutex_enter(softnet_lock);
/* remove ddp from ddp_ports list */
if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT &&
ddp_ports[ddp->ddp_lsat.sat_port - 1] != NULL) {
if (ddp->ddp_pprev != NULL) {
ddp->ddp_pprev->ddp_pnext = ddp->ddp_pnext;
} else {
ddp_ports[ddp->ddp_lsat.sat_port - 1] = ddp->ddp_pnext;
}
if (ddp->ddp_pnext != NULL) {
ddp->ddp_pnext->ddp_pprev = ddp->ddp_pprev;
}
}
rtcache_free(&ddp->ddp_route);
if (ddp->ddp_prev) {
ddp->ddp_prev->ddp_next = ddp->ddp_next;
} else {
ddpcb = ddp->ddp_next;
}
if (ddp->ddp_next) {
ddp->ddp_next->ddp_prev = ddp->ddp_prev;
}
free(ddp, M_PCB);
}
/*
* For the moment, this just find the pcb with the correct local address.
* In the future, this will actually do some real searching, so we can use
* the sender's address to do de-multiplexing on a single port to many
* sockets (pcbs).
*/
struct ddpcb *
ddp_search(
struct sockaddr_at *from,
struct sockaddr_at *to,
struct at_ifaddr *aa)
{
struct ddpcb *ddp;
/*
* Check for bad ports.
*/
if (to->sat_port < ATPORT_FIRST || to->sat_port >= ATPORT_LAST)
return NULL;
/*
* Make sure the local address matches the sent address. What about
* the interface?
*/
for (ddp = ddp_ports[to->sat_port - 1]; ddp; ddp = ddp->ddp_pnext) {
/* XXX should we handle 0.YY? */
/* XXXX.YY to socket on destination interface */
if (to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net &&
to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node) {
break;
}
/* 0.255 to socket on receiving interface */
if (to->sat_addr.s_node == ATADDR_BCAST &&
(to->sat_addr.s_net == 0 ||
to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net) &&
ddp->ddp_lsat.sat_addr.s_net == AA_SAT(aa)->sat_addr.s_net) {
break;
}
/* XXXX.0 to socket on destination interface */
if (to->sat_addr.s_net == aa->aa_firstnet &&
to->sat_addr.s_node == 0 &&
ntohs(ddp->ddp_lsat.sat_addr.s_net) >=
ntohs(aa->aa_firstnet) &&
ntohs(ddp->ddp_lsat.sat_addr.s_net) <=
ntohs(aa->aa_lastnet)) {
break;
}
}
return (ddp);
}
/*
* Initialize all the ddp & appletalk stuff
*/
void
ddp_init(void)
{
ddpstat_percpu = percpu_alloc(sizeof(uint64_t) * DDP_NSTATS);
TAILQ_INIT(&at_ifaddr);
atintrq1.ifq_maxlen = IFQ_MAXLEN;
atintrq2.ifq_maxlen = IFQ_MAXLEN;
MOWNER_ATTACH(&atalk_tx_mowner);
MOWNER_ATTACH(&atalk_rx_mowner);
}
#if 0
static void
ddp_clean()
{
struct ddpcb *ddp;
for (ddp = ddpcb; ddp; ddp = ddp->ddp_next)
at_pcbdetach(ddp->ddp_socket, ddp);
}
#endif
static int
sysctl_net_atalk_ddp_stats(SYSCTLFN_ARGS)
{
return (NETSTAT_SYSCTL(ddpstat_percpu, DDP_NSTATS));
}
/*
* Sysctl for DDP variables.
*/
SYSCTL_SETUP(sysctl_net_atalk_ddp_setup, "sysctl net.atalk.ddp 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, "atalk", NULL,
NULL, 0, NULL, 0,
CTL_NET, PF_APPLETALK, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_NODE, "ddp",
SYSCTL_DESCR("DDP related settings"),
NULL, 0, NULL, 0,
CTL_NET, PF_APPLETALK, ATPROTO_DDP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "stats",
SYSCTL_DESCR("DDP statistics"),
sysctl_net_atalk_ddp_stats, 0, NULL, 0,
CTL_NET, PF_APPLETALK, ATPROTO_DDP, CTL_CREATE,
CTL_EOL);
}