void
sendomsg(Msg *m)
{
int n, nn;
n = sizeS2M(&m->tx);
m->tpkt = emalloc(n);
nn = convS2M(&m->tx, m->tpkt, n);
if(nn <= BIT16SZ)
sysfatal("convS2M conversion error");
if(nn != n)
sysfatal("sizeS2M and convS2M disagree");
sendq(outq, m);
}
void
inputthread(void *arg)
{
uchar *pkt;
int n, nn, tag;
Msg *m;
Ioproc *io;
threadsetname("input");
if(verbose) fprint(2, "%T input thread\n");
io = ioproc();
USED(arg);
while((pkt = read9ppkt(io, 0)) != nil){
n = GBIT32(pkt);
if(n < 7){
fprint(2, "%T short 9P packet from server\n");
free(pkt);
continue;
}
if(verbose > 2) fprint(2, "%T read %.*H\n", n, pkt);
tag = GBIT16(pkt+5);
if((m = msgget(tag)) == nil){
fprint(2, "%T unexpected 9P response tag %d\n", tag);
free(pkt);
continue;
}
if((nn = convM2S(pkt, n, &m->rx)) != n){
fprint(2, "%T bad packet - convM2S %d but %d\n", nn, n);
free(pkt);
msgput(m);
continue;
}
if(verbose > 1) fprint(2, "%T * -> %F%s\n", &m->rx,
m->internal ? " (internal)" : "");
m->rpkt = pkt;
m->rx.tag = m->ctag;
if(m->internal)
sendp(m->c->internal, m);
else if(m->c->outq)
sendq(m->c->outq, m);
else
msgput(m);
}
closeioproc(io);
/*fprint(2, "%T input eof\n"); */
threadexitsall(0);
}
void
connthread(void *arg)
{
int i, fd;
Conn *c;
Hash *h, *hnext;
Msg *m, *om, *mm, sync;
Fid *f;
Ioproc *io;
c = arg;
threadsetname("conn %s", c->dir);
io = ioproc();
fd = ioaccept(io, c->fd, c->dir);
if(fd < 0){
if(verbose) fprint(2, "%T accept %s: %r\n", c->dir);
goto out;
}
close(c->fd);
c->fd = fd;
threadcreate(connoutthread, c, STACK);
while((m = mread9p(io, c->fd)) != nil){
if(verbose > 1) fprint(2, "%T fd#%d -> %F\n", c->fd, &m->tx);
m->c = c;
m->ctag = m->tx.tag;
c->nmsg++;
if(verbose > 1) fprint(2, "%T fd#%d: new msg %p\n", c->fd, m);
if(puthash(c->tag, m->tx.tag, m) < 0){
err(m, "duplicate tag");
continue;
}
msgincref(m);
switch(m->tx.type){
case Tversion:
m->rx.tag = m->tx.tag;
m->rx.msize = m->tx.msize;
if(m->rx.msize > msize)
m->rx.msize = msize;
m->rx.version = "9P2000";
m->rx.type = Rversion;
send9pmsg(m);
continue;
case Tflush:
if((m->oldm = gethash(c->tag, m->tx.oldtag)) == nil){
m->rx.tag = m->tx.tag;
m->rx.type = Rflush;
send9pmsg(m);
continue;
}
msgincref(m->oldm);
break;
case Tattach:
m->afid = nil;
if(m->tx.afid != NOFID
&& (m->afid = gethash(c->fid, m->tx.afid)) == nil){
err(m, "unknown fid");
continue;
}
if(m->afid)
m->afid->ref++;
m->fid = fidnew(m->tx.fid);
if(puthash(c->fid, m->tx.fid, m->fid) < 0){
err(m, "duplicate fid");
continue;
}
m->fid->ref++;
if(attached && m->afid==nil){
if(m->tx.aname[0] && strcmp(xaname, m->tx.aname) != 0){
err(m, "invalid attach name");
continue;
}
m->tx.afid = xafid;
m->tx.aname = xaname;
m->tx.uname = getuser(); /* what srv.c used */
repack(&m->tx, &m->tpkt);
}
break;
case Twalk:
if((m->fid = gethash(c->fid, m->tx.fid)) == nil){
err(m, "unknown fid");
continue;
}
m->fid->ref++;
if(m->tx.newfid == m->tx.fid){
m->fid->ref++;
m->newfid = m->fid;
}else{
m->newfid = fidnew(m->tx.newfid);
if(puthash(c->fid, m->tx.newfid, m->newfid) < 0){
err(m, "duplicate fid");
continue;
}
m->newfid->ref++;
}
break;
case Tauth:
if(attached){
err(m, "authentication not required");
continue;
}
if(noauth){
err(m, "authentication rejected");
continue;
}
m->afid = fidnew(m->tx.afid);
if(puthash(c->fid, m->tx.afid, m->afid) < 0){
err(m, "duplicate fid");
continue;
}
m->afid->ref++;
break;
case Tcreate:
if(m->tx.perm&(DMSYMLINK|DMDEVICE|DMNAMEDPIPE|DMSOCKET)){
err(m, "unsupported file type");
continue;
}
goto caseTopen;
case Topenfd:
if(m->tx.mode&~(OTRUNC|3)){
err(m, "bad openfd mode");
continue;
}
m->isopenfd = 1;
m->tx.type = Topen;
m->tpkt[4] = Topen;
/* fall through */
caseTopen:
case Topen:
case Tclunk:
case Tread:
case Twrite:
case Tremove:
case Tstat:
case Twstat:
if((m->fid = gethash(c->fid, m->tx.fid)) == nil){
err(m, "unknown fid");
continue;
}
m->fid->ref++;
break;
}
/* have everything - translate and send */
m->c = c;
m->ctag = m->tx.tag;
m->tx.tag = m->tag;
if(m->fid)
m->tx.fid = m->fid->fid;
if(m->newfid)
m->tx.newfid = m->newfid->fid;
if(m->afid)
m->tx.afid = m->afid->fid;
if(m->oldm)
m->tx.oldtag = m->oldm->tag;
/* reference passes to outq */
sendq(outq, m);
while(c->nmsg >= MAXMSG){
c->inputstalled = 1;
recvp(c->inc);
}
}
if(verbose) fprint(2, "%T fd#%d eof; flushing conn\n", c->fd);
/* flush all outstanding messages */
for(i=0; i<NHASH; i++){
while((h = c->tag[i]) != nil){
om = h->v;
msgincref(om); /* for us */
m = msgnew(0);
m->internal = 1;
m->c = c;
c->nmsg++;
m->tx.type = Tflush;
m->tx.tag = m->tag;
m->tx.oldtag = om->tag;
m->oldm = om;
msgincref(om);
msgincref(m); /* for outq */
sendomsg(m);
mm = recvp(c->internal);
assert(mm == m);
msgput(m); /* got from recvp */
msgput(m); /* got from msgnew */
if(delhash(c->tag, om->ctag, om) == 0)
msgput(om); /* got from hash table */
msgput(om); /* got from msgincref */
}
}
/*
* outputthread has written all its messages
* to the remote connection (because we've gotten all the replies!),
* but it might not have gotten a chance to msgput
* the very last one. sync up to make sure.
*/
memset(&sync, 0, sizeof sync);
sync.sync = 1;
sync.c = c;
sendq(outq, &sync);
recvp(c->outqdead);
/* everything is quiet; can close the local output queue. */
sendq(c->outq, nil);
recvp(c->outqdead);
/* should be no messages left anywhere. */
assert(c->nmsg == 0);
/* clunk all outstanding fids */
for(i=0; i<NHASH; i++){
for(h=c->fid[i]; h; h=hnext){
f = h->v;
m = msgnew(0);
m->internal = 1;
m->c = c;
c->nmsg++;
m->tx.type = Tclunk;
m->tx.tag = m->tag;
m->tx.fid = f->fid;
m->fid = f;
f->ref++;
msgincref(m);
sendomsg(m);
mm = recvp(c->internal);
assert(mm == m);
msgclear(m);
msgput(m); /* got from recvp */
msgput(m); /* got from msgnew */
fidput(f); /* got from hash table */
hnext = h->next;
free(h);
}
}
out:
closeioproc(io);
assert(c->nmsg == 0);
assert(c->nfid == 0);
close(c->fd);
chanfree(c->internal);
c->internal = 0;
chanfree(c->inc);
c->inc = 0;
free(c->inq);
c->inq = 0;
free(c);
}
int main( int argc, char *argv[] ){
int retries;
int rv;
uint32_t uv = 0;
int tz = 0;
struct ntp_t *ptr = (struct ntp_t *)buf;
char *p;
while ((rv = getopt( argc, argv, "p:o:ds" )) > 0 ){
switch (rv){
case 'p':
port = atoi( optarg );
break;
case 'o':
tz = atoi( optarg );
if (tz < -12 || tz > 12){
fprintf(stderr, "bad timezone\n");
exit(1);
}
break;
case 's':
setflg = 1;
break;
case 'd':
disflg = 1;
break;
case '?':
pusage();
}
}
if( ! argv[optind] )
pusage();
my_open( argc, argv );
retries = 3;
while (retries--){
sendq();
signal( SIGALRM, alarm_handler );
alarm(2);
rv = read( fd, buf, MAXBUF);
if (rv < 0 )
continue;
if (rv >= sizeof( struct ntp_t ))
goto process;
}
fprintf(stderr, "timeout\n");
exit(1);
process:
uv = ptr->xmit.sec;
uv -= 2208988800L;
uv += tz * 60 * 60;
if (disflg || !setflg)
printf(ctime((time_t *)&uv));
if (setflg){
rv = stime((time_t *)&uv);
if (rv){
perror( "stime" );
exit(1);
}
}
exit(0);
}
