////////////////////////////////////////////////////////////////////////////////
//
// firewire_frameout
//
// IN: ifnet_t ifp,struct mbuf **m
// IN: struct sockaddr *ndest - contains the destination IP Address
// IN: char *edst - filled by firewire_arpresolve function in if_firewire.c
// IN: char *fw_type
//
// Invoked by :
// dlil.c for dlil_output, Its called after inet_firewire_pre_output
//
// Encapsulate a packet of type family for the local net.
// Use trailer local net encapsulation if enough data in first
// packet leaves a multiple of 512 bytes of data in remainder.
//
////////////////////////////////////////////////////////////////////////////////
__private_extern__ int
firewire_frameout(ifnet_t ifp, mbuf_t *m,
const struct sockaddr *ndest, const char *edst, const char *fw_type)
{
register struct firewire_header *fwh;
/*
* If a simplex interface, and the packet is being sent to our
* Ethernet address or a broadcast address, loopback a copy.
* XXX To make a simplex device behave exactly like a duplex
* device, we should copy in the case of sending to our own
* ethernet address (thus letting the original actually appear
* on the wire). However, we don't do that here for security
* reasons and compatibility with the original behavior.
*/
if ((ifnet_flags(ifp) & IFF_SIMPLEX) &&
(mbuf_flags(*m) & MBUF_LOOP))
{
if (loop_ifp == NULL) {
ifnet_find_by_name("lo0", &loop_ifp);
/*
* We make an assumption here that lo0 will never go away. This
* means we don't have to worry about releasing the reference
* later and we don't have to worry about leaking a reference
* every time we are loaded.
*/
ifnet_release(loop_ifp);
}
if (loop_ifp)
{
if (mbuf_flags(*m) & MBUF_BCAST)
{
mbuf_t n;
if (mbuf_copym(*m, 0, MBUF_COPYALL, MBUF_WAITOK, &n) == 0)
ifnet_output(loop_ifp, PF_INET, n, 0, ndest);
}
else
{
if (bcmp(edst, ifnet_lladdr(ifp), FIREWIRE_ADDR_LEN) == 0)
{
ifnet_output(loop_ifp, PF_INET, *m, 0, ndest);
return EJUSTRETURN;
}
}
}
}
//
// Add local net header. If no space in first mbuf,
// allocate another.
//
if (mbuf_prepend(m, sizeof(struct firewire_header), MBUF_DONTWAIT) != 0)
return (EJUSTRETURN);
//
// Lets put this intelligent here into the mbuf
// so we can demux on our output path
//
fwh = (struct firewire_header*)mbuf_data(*m);
(void)memcpy(&fwh->fw_type, fw_type,sizeof(fwh->fw_type));
memcpy(fwh->fw_dhost, edst, FIREWIRE_ADDR_LEN);
(void)memcpy(fwh->fw_shost, ifnet_lladdr(ifp), sizeof(fwh->fw_shost));
return 0;
}
/*
* Do a remote procedure call (RPC) and wait for its reply.
* If from_p is non-null, then we are doing broadcast, and
* the address from whence the response came is saved there.
*/
int
krpc_call(
struct sockaddr_in *sa,
u_int sotype, u_int prog, u_int vers, u_int func,
mbuf_t *data, /* input/output */
struct sockaddr_in *from_p) /* output */
{
socket_t so;
struct sockaddr_in *sin;
mbuf_t m, nam, mhead;
struct rpc_call *call;
struct rpc_reply *reply;
int error, timo, secs;
size_t len;
static u_int32_t xid = ~0xFF;
u_int16_t tport;
size_t maxpacket = 1<<16;
/*
* Validate address family.
* Sorry, this is INET specific...
*/
if (sa->sin_family != AF_INET)
return (EAFNOSUPPORT);
/* Free at end if not null. */
nam = mhead = NULL;
/*
* Create socket and set its recieve timeout.
*/
if ((error = sock_socket(AF_INET, sotype, 0, 0, 0, &so)))
goto out1;
{
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
if ((error = sock_setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv))))
goto out;
}
/*
* Enable broadcast if necessary.
*/
if (from_p && (sotype == SOCK_DGRAM)) {
int on = 1;
if ((error = sock_setsockopt(so, SOL_SOCKET, SO_BROADCAST, &on, sizeof(on))))
goto out;
}
/*
* Bind the local endpoint to a reserved port,
* because some NFS servers refuse requests from
* non-reserved (non-privileged) ports.
*/
if ((error = mbuf_get(MBUF_WAITOK, MBUF_TYPE_SONAME, &m)))
goto out;
sin = mbuf_data(m);
bzero(sin, sizeof(*sin));
mbuf_setlen(m, sizeof(*sin));
sin->sin_len = sizeof(*sin);
sin->sin_family = AF_INET;
sin->sin_addr.s_addr = INADDR_ANY;
tport = IPPORT_RESERVED;
do {
tport--;
sin->sin_port = htons(tport);
error = sock_bind(so, (struct sockaddr*)sin);
} while (error == EADDRINUSE &&
tport > IPPORT_RESERVED / 2);
mbuf_freem(m);
m = NULL;
if (error) {
printf("bind failed\n");
goto out;
}
/*
* Setup socket address for the server.
*/
if ((error = mbuf_get(MBUF_WAITOK, MBUF_TYPE_SONAME, &nam)))
goto out;
sin = mbuf_data(nam);
mbuf_setlen(nam, sa->sin_len);
bcopy((caddr_t)sa, (caddr_t)sin, sa->sin_len);
if (sotype == SOCK_STREAM) {
struct timeval tv;
tv.tv_sec = 60;
tv.tv_usec = 0;
error = sock_connect(so, mbuf_data(nam), MSG_DONTWAIT);
if (error && (error != EINPROGRESS))
goto out;
error = sock_connectwait(so, &tv);
if (error) {
if (error == EINPROGRESS)
error = ETIMEDOUT;
printf("krpc_call: error waiting for TCP socket connect: %d\n", error);
goto out;
}
}
/*
* Prepend RPC message header.
*/
m = *data;
*data = NULL;
#if DIAGNOSTIC
if ((mbuf_flags(m) & MBUF_PKTHDR) == 0)
panic("krpc_call: send data w/o pkthdr");
if (mbuf_pkthdr_len(m) < mbuf_len(m))
panic("krpc_call: pkthdr.len not set");
#endif
len = sizeof(*call);
if (sotype == SOCK_STREAM)
len += 4; /* account for RPC record marker */
mhead = m;
if ((error = mbuf_prepend(&mhead, len, MBUF_WAITOK)))
goto out;
if ((error = mbuf_pkthdr_setrcvif(mhead, NULL)))
goto out;
/*
* Fill in the RPC header
*/
if (sotype == SOCK_STREAM) {
/* first, fill in RPC record marker */
u_int32_t *recmark = mbuf_data(mhead);
*recmark = htonl(0x80000000 | (mbuf_pkthdr_len(mhead) - 4));
call = (struct rpc_call *)(recmark + 1);
} else {
call = mbuf_data(mhead);
}
bzero((caddr_t)call, sizeof(*call));
xid++;
call->rp_xid = htonl(xid);
/* call->rp_direction = 0; */
call->rp_rpcvers = htonl(2);
call->rp_prog = htonl(prog);
call->rp_vers = htonl(vers);
call->rp_proc = htonl(func);
/* call->rp_auth = 0; */
/* call->rp_verf = 0; */
/*
* Send it, repeatedly, until a reply is received,
* but delay each re-send by an increasing amount.
* If the delay hits the maximum, start complaining.
*/
timo = 0;
for (;;) {
struct msghdr msg;
/* Send RPC request (or re-send). */
if ((error = mbuf_copym(mhead, 0, MBUF_COPYALL, MBUF_WAITOK, &m)))
goto out;
bzero(&msg, sizeof(msg));
if (sotype == SOCK_STREAM) {
msg.msg_name = NULL;
msg.msg_namelen = 0;
} else {
msg.msg_name = mbuf_data(nam);
msg.msg_namelen = mbuf_len(nam);
}
error = sock_sendmbuf(so, &msg, m, 0, 0);
if (error) {
printf("krpc_call: sosend: %d\n", error);
goto out;
}
m = NULL;
/* Determine new timeout. */
if (timo < MAX_RESEND_DELAY)
timo++;
else
printf("RPC timeout for server " IP_FORMAT "\n",
IP_LIST(&(sin->sin_addr.s_addr)));
/*
* Wait for up to timo seconds for a reply.
* The socket receive timeout was set to 1 second.
*/
secs = timo;
while (secs > 0) {
size_t readlen;
if (m) {
mbuf_freem(m);
m = NULL;
}
if (sotype == SOCK_STREAM) {
int maxretries = 60;
struct iovec aio;
aio.iov_base = &len;
aio.iov_len = sizeof(u_int32_t);
bzero(&msg, sizeof(msg));
msg.msg_iov = &aio;
msg.msg_iovlen = 1;
do {
error = sock_receive(so, &msg, MSG_WAITALL, &readlen);
if ((error == EWOULDBLOCK) && (--maxretries <= 0))
error = ETIMEDOUT;
} while (error == EWOULDBLOCK);
if (!error && readlen < aio.iov_len) {
/* only log a message if we got a partial word */
if (readlen != 0)
printf("short receive (%ld/%ld) from server " IP_FORMAT "\n",
readlen, sizeof(u_int32_t), IP_LIST(&(sin->sin_addr.s_addr)));
error = EPIPE;
}
if (error)
goto out;
len = ntohl(len) & ~0x80000000;
/*
* This is SERIOUS! We are out of sync with the sender
* and forcing a disconnect/reconnect is all I can do.
*/
if (len > maxpacket) {
printf("impossible packet length (%ld) from server " IP_FORMAT "\n",
len, IP_LIST(&(sin->sin_addr.s_addr)));
error = EFBIG;
goto out;
}
do {
readlen = len;
error = sock_receivembuf(so, NULL, &m, MSG_WAITALL, &readlen);
} while (error == EWOULDBLOCK);
if (!error && (len > readlen)) {
printf("short receive (%ld/%ld) from server " IP_FORMAT "\n",
readlen, len, IP_LIST(&(sin->sin_addr.s_addr)));
error = EPIPE;
}
} else {
len = maxpacket;
readlen = len;
bzero(&msg, sizeof(msg));
msg.msg_name = from_p;
msg.msg_namelen = (from_p == NULL) ? 0 : sizeof(*from_p);
error = sock_receivembuf(so, &msg, &m, 0, &readlen);
}
if (error == EWOULDBLOCK) {
secs--;
continue;
}
if (error)
goto out;
len = readlen;
/* Does the reply contain at least a header? */
if (len < MIN_REPLY_HDR)
continue;
if (mbuf_len(m) < MIN_REPLY_HDR)
continue;
reply = mbuf_data(m);
/* Is it the right reply? */
if (reply->rp_direction != htonl(RPC_REPLY))
continue;
if (reply->rp_xid != htonl(xid))
continue;
/* Was RPC accepted? (authorization OK) */
if (reply->rp_astatus != 0) {
error = ntohl(reply->rp_u.rpu_errno);
printf("rpc denied, error=%d\n", error);
/* convert rpc error to errno */
switch (error) {
case RPC_MISMATCH:
error = ERPCMISMATCH;
break;
case RPC_AUTHERR:
error = EAUTH;
break;
}
goto out;
}
if (mbuf_len(m) < REPLY_SIZE) {
error = RPC_SYSTEM_ERR;
}
else {
error = ntohl(reply->rp_u.rpu_ok.rp_rstatus);
}
/* Did the call succeed? */
if (error != 0) {
printf("rpc status=%d\n", error);
/* convert rpc error to errno */
switch (error) {
case RPC_PROGUNAVAIL:
error = EPROGUNAVAIL;
break;
case RPC_PROGMISMATCH:
error = EPROGMISMATCH;
break;
case RPC_PROCUNAVAIL:
error = EPROCUNAVAIL;
break;
case RPC_GARBAGE:
error = EINVAL;
break;
case RPC_SYSTEM_ERR:
error = EIO;
break;
}
goto out;
}
goto gotreply; /* break two levels */
} /* while secs */
} /* forever send/receive */
error = ETIMEDOUT;
goto out;
gotreply:
/*
* Pull as much as we can into first mbuf, to make
* result buffer contiguous. Note that if the entire
* result won't fit into one mbuf, you're out of luck.
* XXX - Should not rely on making the entire reply
* contiguous (fix callers instead). -gwr
*/
#if DIAGNOSTIC
if ((mbuf_flags(m) & MBUF_PKTHDR) == 0)
panic("krpc_call: received pkt w/o header?");
#endif
len = mbuf_pkthdr_len(m);
if (sotype == SOCK_STREAM)
len -= 4; /* the RPC record marker was read separately */
if (mbuf_len(m) < len) {
if ((error = mbuf_pullup(&m, len)))
goto out;
reply = mbuf_data(m);
}
/*
* Strip RPC header
*/
len = sizeof(*reply);
if (reply->rp_u.rpu_ok.rp_auth.rp_atype != 0) {
len += ntohl(reply->rp_u.rpu_ok.rp_auth.rp_alen);
len = (len + 3) & ~3; /* XXX? */
}
mbuf_adj(m, len);
/* result */
*data = m;
out:
sock_close(so);
out1:
if (nam) mbuf_freem(nam);
if (mhead) mbuf_freem(mhead);
return error;
}
/*
* Look for the request in the cache
* If found then
* return action and optionally reply
* else
* insert it in the cache
*
* The rules are as follows:
* - if in progress, return DROP request
* - if completed within DELAY of the current time, return DROP it
* - if completed a longer time ago return REPLY if the reply was cached or
* return DOIT
* Update/add new request at end of lru list
*/
int
nfsrv_getcache(
struct nfsrv_descript *nd,
struct nfsrv_sock *slp,
mbuf_t *mrepp)
{
struct nfsrvcache *rp;
struct nfsm_chain nmrep;
struct sockaddr *saddr;
int ret, error;
/*
* Don't cache recent requests for reliable transport protocols.
* (Maybe we should for the case of a reconnect, but..)
*/
if (!nd->nd_nam2)
return (RC_DOIT);
lck_mtx_lock(nfsrv_reqcache_mutex);
loop:
for (rp = NFSRCHASH(nd->nd_retxid)->lh_first; rp != 0;
rp = rp->rc_hash.le_next) {
if (nd->nd_retxid == rp->rc_xid && nd->nd_procnum == rp->rc_proc &&
netaddr_match(rp->rc_family, &rp->rc_haddr, nd->nd_nam)) {
if ((rp->rc_flag & RC_LOCKED) != 0) {
rp->rc_flag |= RC_WANTED;
msleep(rp, nfsrv_reqcache_mutex, PZERO-1, "nfsrc", NULL);
goto loop;
}
rp->rc_flag |= RC_LOCKED;
/* If not at end of LRU chain, move it there */
if (rp->rc_lru.tqe_next) {
TAILQ_REMOVE(&nfsrv_reqcache_lruhead, rp, rc_lru);
TAILQ_INSERT_TAIL(&nfsrv_reqcache_lruhead, rp, rc_lru);
}
if (rp->rc_state == RC_UNUSED)
panic("nfsrv cache");
if (rp->rc_state == RC_INPROG) {
OSAddAtomic(1, &nfsstats.srvcache_inproghits);
ret = RC_DROPIT;
} else if (rp->rc_flag & RC_REPSTATUS) {
OSAddAtomic(1, &nfsstats.srvcache_nonidemdonehits);
nd->nd_repstat = rp->rc_status;
error = nfsrv_rephead(nd, slp, &nmrep, 0);
if (error) {
printf("nfsrv cache: reply alloc failed for nonidem request hit\n");
ret = RC_DROPIT;
*mrepp = NULL;
} else {
ret = RC_REPLY;
*mrepp = nmrep.nmc_mhead;
}
} else if (rp->rc_flag & RC_REPMBUF) {
OSAddAtomic(1, &nfsstats.srvcache_nonidemdonehits);
error = mbuf_copym(rp->rc_reply, 0, MBUF_COPYALL, MBUF_WAITOK, mrepp);
if (error) {
printf("nfsrv cache: reply copym failed for nonidem request hit\n");
ret = RC_DROPIT;
} else {
ret = RC_REPLY;
}
} else {
OSAddAtomic(1, &nfsstats.srvcache_idemdonehits);
rp->rc_state = RC_INPROG;
ret = RC_DOIT;
}
rp->rc_flag &= ~RC_LOCKED;
if (rp->rc_flag & RC_WANTED) {
rp->rc_flag &= ~RC_WANTED;
wakeup(rp);
}
lck_mtx_unlock(nfsrv_reqcache_mutex);
return (ret);
}
}
OSAddAtomic(1, &nfsstats.srvcache_misses);
if (nfsrv_reqcache_count < nfsrv_reqcache_size) {
/* try to allocate a new entry */
MALLOC(rp, struct nfsrvcache *, sizeof *rp, M_NFSD, M_WAITOK);
if (rp) {
bzero((char *)rp, sizeof *rp);
nfsrv_reqcache_count++;
rp->rc_flag = RC_LOCKED;
}
} else {
