Viewing file:  auth_null.c (2.41 KB) -rw-r--r--
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/*
* linux/net/sunrpc/rpcauth_null.c
*
* AUTH_NULL authentication. Really :-)
*
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/utsname.h>
#include <linux/sunrpc/clnt.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)
{
struct rpc_auth *auth;
dprintk("RPC: creating NULL authenticator for client %p\n", clnt);
if (!(auth = (struct rpc_auth *) rpc_allocate(0, sizeof(*auth))))
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);
rpc_free(auth);
}
/*
* Create NULL creds for current process
*/
static struct rpc_cred *
nul_create_cred(int flags)
{
struct rpc_cred *cred;
if (!(cred = (struct rpc_cred *) rpc_allocate(flags, sizeof(*cred))))
return NULL;
atomic_set(&cred->cr_count, 0);
cred->cr_flags = RPCAUTH_CRED_UPTODATE;
cred->cr_uid = current->uid;
cred->cr_ops = &null_credops;
return cred;
}
/*
* Destroy cred handle.
*/
static void
nul_destroy_cred(struct rpc_cred *cred)
{
rpc_free(cred);
}
/*
* Match cred handle against current process
*/
static int
nul_match(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)
{
return task->tk_status = -EACCES;
}
static u32 *
nul_validate(struct rpc_task *task, u32 *p)
{
u32 n = ntohl(*p++);
if (n != RPC_AUTH_NULL) {
printk("RPC: bad verf flavor: %ld\n", (unsigned long) n);
return NULL;
}
if ((n = ntohl(*p++)) != 0) {
printk("RPC: bad verf size: %ld\n", (unsigned long) n);
return NULL;
}
return p;
}
struct rpc_authops authnull_ops = {
RPC_AUTH_NULL,
#ifdef RPC_DEBUG
"NULL",
#endif
nul_create,
nul_destroy,
nul_create_cred
};
static
struct rpc_credops null_credops = {
nul_destroy_cred,
nul_match,
nul_marshal,
nul_refresh,
nul_validate
};
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