Attr*
addcap(Attr *a, char *sysuser, Ticket *t)
{
Attr *newa;
char *c;
// c = mkcap(t->cuid, t->suid);
c = mkcap(sysuser, t->suid);
newa = addattr(a, "cuid=%q suid=%q cap=%s", t->cuid, t->suid, c);
free(c);
return newa;
}
void
rpcread(Req *r)
{
Attr *attr;
char *p;
int ophase, ret;
uint8_t *e;
uint count;
Fsstate *fss;
Proto *proto;
if(r->ifcall.count < 64){
respond(r, "rpc read too small");
return;
}
fss = r->fid->aux;
if(!fss->pending){
respond(r, "no rpc pending");
return;
}
switch(fss->rpc.iverb){
default:
case Vunknown:
retstring(r, fss, "error unknown verb");
break;
case Vstart:
if(fss->phase != Notstarted){
flog("%d: implicit close due to second start; old attr '%A'", fss->seqnum, fss->attr);
if(fss->proto && fss->ps)
(*fss->proto->close)(fss);
fss->ps = nil;
fss->proto = nil;
_freeattr(fss->attr);
fss->attr = nil;
fss->phase = Notstarted;
}
attr = _parseattr(fss->rpc.arg);
if((p = _strfindattr(attr, "proto")) == nil){
retstring(r, fss, "error did not specify proto");
_freeattr(attr);
break;
}
if((proto = findproto(p)) == nil){
snprint(fss->rpc.buf, Maxrpc, "error unknown protocol %q", p);
retstring(r, fss, fss->rpc.buf);
_freeattr(attr);
break;
}
fss->attr = attr;
fss->proto = proto;
fss->seqnum = ++seqnum;
ret = (*proto->init)(proto, fss);
rpcstartlog(attr, fss, ret);
if(ret != RpcOk){
_freeattr(fss->attr);
fss->attr = nil;
fss->phase = Notstarted;
}
retrpc(r, ret, fss);
break;
case Vread:
if(fss->rpc.arg && fss->rpc.arg[0]){
retstring(r, fss, "error read needs no parameters");
break;
}
if(rdwrcheck(r, fss) < 0)
break;
count = r->ifcall.count - 3;
ophase = fss->phase;
ret = fss->proto->read(fss, (uint8_t*)r->ofcall.data+3,
&count);
rpcrdwrlog(fss, "read", count, ophase, ret);
if(ret == RpcOk){
memmove(r->ofcall.data, "ok ", 3);
if(count == 0)
r->ofcall.count = 2;
else
r->ofcall.count = 3+count;
fss->pending = 0;
respond(r, nil);
}else
retrpc(r, ret, fss);
break;
case Vwrite:
if(rdwrcheck(r, fss) < 0)
break;
ophase = fss->phase;
ret = fss->proto->write(fss, fss->rpc.arg, fss->rpc.narg);
rpcrdwrlog(fss, "write", fss->rpc.narg, ophase, ret);
retrpc(r, ret, fss);
break;
case Vauthinfo:
if(fss->phase != Established){
retstring(r, fss, "error authentication unfinished");
break;
}
if(!fss->haveai){
retstring(r, fss, "error no authinfo available");
break;
}
memmove(r->ofcall.data, "ok ", 3);
fss->ai.cap = mkcap(r->fid->uid, fss->ai.suid);
e = convAI2M(&fss->ai, (uint8_t*)r->ofcall.data+3,
r->ifcall.count-3);
free(fss->ai.cap);
fss->ai.cap = nil;
if(e == nil){
retstring(r, fss, "error read too small");
break;
}
r->ofcall.count = e - (uint8_t*)r->ofcall.data;
fss->pending = 0;
respond(r, nil);
break;
case Vattr:
snprint(fss->rpc.buf, Maxrpc, "ok %A", fss->attr);
retstring(r, fss, fss->rpc.buf);
break;
}
}