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#include <u.h>
#include <libc.h>
#include <auth.h>
#include <9pclient.h>
#include "authlocal.h"
static struct {
char *verb;
int val;
} tab[] = {
"ok", ARok,
"done", ARdone,
"error", ARerror,
"needkey", ARneedkey,
"badkey", ARbadkey,
"phase", ARphase,
"toosmall", ARtoosmall,
"error", ARerror,
};
static long
rpcread(AuthRpc *rpc, void *buf, int buflen)
{
if (rpc->afd >= 0)
return read(rpc->afd, buf, buflen);
else
return fsread(rpc->afid, buf, buflen);
}
static long
rpcwrite(AuthRpc *rpc, void *buf, int buflen)
{
if (rpc->afd >= 0)
return write(rpc->afd, buf, buflen);
else
return fswrite(rpc->afid, buf, buflen);
}
static int
classify(char *buf, uint n, AuthRpc *rpc)
{
int i, len;
for(i=0; i<nelem(tab); i++){
len = strlen(tab[i].verb);
if(n >= len && memcmp(buf, tab[i].verb, len) == 0 && (n==len || buf[len]==' ')){
if(n==len){
rpc->narg = 0;
rpc->arg = "";
}else{
rpc->narg = n - (len+1);
rpc->arg = (char*)buf+len+1;
}
return tab[i].val;
}
}
werrstr("malformed rpc response: %s", buf);
return ARrpcfailure;
}
AuthRpc*
auth_allocrpc(void)
{
AuthRpc *rpc;
rpc = mallocz(sizeof(*rpc), 1);
if(rpc == nil)
return nil;
rpc->afd = open("/mnt/factotum/rpc", ORDWR);
if(rpc->afd < 0){
rpc->afid = nsopen("factotum", nil, "rpc", ORDWR);
if(rpc->afid == nil){
free(rpc);
return nil;
}
}
return rpc;
}
void
auth_freerpc(AuthRpc *rpc)
{
if(rpc == nil)
return;
if(rpc->afd >= 0)
close(rpc->afd);
if(rpc->afid != nil)
fsclose(rpc->afid);
free(rpc);
}
uint
auth_rpc(AuthRpc *rpc, char *verb, void *a, int na)
{
int l, n, type;
char *f[4];
l = strlen(verb);
if(na+l+1 > AuthRpcMax){
werrstr("rpc too big");
return ARtoobig;
}
memmove(rpc->obuf, verb, l);
rpc->obuf[l] = ' ';
memmove(rpc->obuf+l+1, a, na);
if((n=rpcwrite(rpc, rpc->obuf, l+1+na)) != l+1+na){
if(n >= 0)
werrstr("auth_rpc short write");
return ARrpcfailure;
}
if((n=rpcread(rpc, rpc->ibuf, AuthRpcMax)) < 0)
return ARrpcfailure;
rpc->ibuf[n] = '\0';
/*
* Set error string for good default behavior.
*/
switch(type = classify(rpc->ibuf, n, rpc)){
default:
werrstr("unknown rpc type %d (bug in auth_rpc.c)", type);
break;
case ARok:
break;
case ARrpcfailure:
break;
case ARerror:
if(rpc->narg == 0)
werrstr("unspecified rpc error");
else
werrstr("%s", rpc->arg);
break;
case ARneedkey:
werrstr("needkey %s", rpc->arg);
break;
case ARbadkey:
if(getfields(rpc->arg, f, nelem(f), 0, "\n") < 2)
werrstr("badkey %s", rpc->arg);
else
werrstr("badkey %s", f[1]);
break;
case ARphase:
werrstr("phase error %s", rpc->arg);
break;
}
return type;
}
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