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/*
* linux/net/sunrpc/auth_null.c
*
* AUTH_NULL authentication. Really :-)
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/module.h>
#include <linux/in.h>
#include <linux/utsname.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sched.h>
#ifdef RPC_DEBUG
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
static struct rpc_credops null_credops;
static struct rpc_auth *
nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
{
struct rpc_auth *auth;
dprintk("RPC: creating NULL authenticator for client %p\n", clnt);
if (!(auth = (struct rpc_auth *) kmalloc(sizeof(*auth),GFP_KERNEL)))
return NULL;
auth->au_cslack = 4;
auth->au_rslack = 2;
auth->au_ops = &authnull_ops;
auth->au_expire = 1800 * HZ;
rpcauth_init_credcache(auth);
return (struct rpc_auth *) auth;
}
static void
nul_destroy(struct rpc_auth *auth)
{
dprintk("RPC: destroying NULL authenticator %p\n", auth);
rpcauth_free_credcache(auth);
}
/*
* Create NULL creds for current process
*/
static struct rpc_cred *
nul_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
struct rpc_cred *cred;
if (!(cred = (struct rpc_cred *) kmalloc(sizeof(*cred),GFP_KERNEL)))
return NULL;
atomic_set(&cred->cr_count, 0);
cred->cr_flags = RPCAUTH_CRED_UPTODATE;
cred->cr_uid = acred->uid;
cred->cr_ops = &null_credops;
return cred;
}
/*
* Destroy cred handle.
*/
static void
nul_destroy_cred(struct rpc_cred *cred)
{
kfree(cred);
}
/*
* Match cred handle against current process
*/
static int
nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
{
return 1;
}
/*
* Marshal credential.
*/
static u32 *
nul_marshal(struct rpc_task *task, u32 *p, int ruid)
{
*p++ = htonl(RPC_AUTH_NULL);
*p++ = 0;
*p++ = htonl(RPC_AUTH_NULL);
*p++ = 0;
return p;
}
/*
* Refresh credential. This is a no-op for AUTH_NULL
*/
static int
nul_refresh(struct rpc_task *task)
{
task->tk_msg.rpc_cred->cr_flags |= RPCAUTH_CRED_UPTODATE;
return 0;
}
static u32 *
nul_validate(struct rpc_task *task, u32 *p)
{
rpc_authflavor_t flavor;
u32 size;
flavor = ntohl(*p++);
if (flavor != RPC_AUTH_NULL) {
printk("RPC: bad verf flavor: %u\n", flavor);
return NULL;
}
size = ntohl(*p++);
if (size != 0) {
printk("RPC: bad verf size: %u\n", size);
return NULL;
}
return p;
}
struct rpc_authops authnull_ops = {
.owner = THIS_MODULE,
.au_flavor = RPC_AUTH_NULL,
#ifdef RPC_DEBUG
.au_name = "NULL",
#endif
.create = nul_create,
.destroy = nul_destroy,
.crcreate = nul_create_cred,
};
static
struct rpc_credops null_credops = {
.crdestroy = nul_destroy_cred,
.crmatch = nul_match,
.crmarshal = nul_marshal,
.crrefresh = nul_refresh,
.crvalidate = nul_validate,
};
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