[net-next-2.6.git] / net / sunrpc / auth_null.c

/*
 * 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_auth null_auth;
static struct rpc_cred null_cred;

static struct rpc_auth *
nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
{
	atomic_inc(&null_auth.au_count);
	return &null_auth;
}

static void
nul_destroy(struct rpc_auth *auth)
{
}

/*
 * Lookup NULL creds for current process
 */
static struct rpc_cred *
nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
	return get_rpccred(&null_cred);
}

/*
 * Destroy cred handle.
 */
static void
nul_destroy_cred(struct rpc_cred *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)
{
	*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,
	.lookup_cred	= nul_lookup_cred,
};

static
struct rpc_auth null_auth = {
	.au_cslack	= 4,
	.au_rslack	= 2,
	.au_ops		= &authnull_ops,
};

static
struct rpc_credops	null_credops = {
	.cr_name	= "AUTH_NULL",
	.crdestroy	= nul_destroy_cred,
	.crmatch	= nul_match,
	.crmarshal	= nul_marshal,
	.crrefresh	= nul_refresh,
	.crvalidate	= nul_validate,
};

static
struct rpc_cred null_cred = {
	.cr_ops		= &null_credops,
	.cr_count	= ATOMIC_INIT(1),
	.cr_flags	= RPCAUTH_CRED_UPTODATE,
#ifdef RPC_DEBUG
	.cr_magic	= RPCAUTH_CRED_MAGIC,
#endif
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/net/sunrpc/auth_null.c
	3	*
	4	* AUTH_NULL authentication. Really :-)
	5	*
	6	* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/socket.h>
	11	#include <linux/module.h>
	12	#include <linux/in.h>
	13	#include <linux/utsname.h>
	14	#include <linux/sunrpc/clnt.h>
	15	#include <linux/sched.h>
	16
	17	#ifdef RPC_DEBUG
	18	# define RPCDBG_FACILITY RPCDBG_AUTH
	19	#endif
	20
	21	static struct rpc_auth null_auth;
	22	static struct rpc_cred null_cred;
	23
	24	static struct rpc_auth *
	25	nul_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
	26	{
	27	atomic_inc(&null_auth.au_count);
	28	return &null_auth;
	29	}
	30
	31	static void
	32	nul_destroy(struct rpc_auth *auth)
	33	{
	34	}
	35
	36	/*
	37	* Lookup NULL creds for current process
	38	*/
	39	static struct rpc_cred *
	40	nul_lookup_cred(struct rpc_auth auth, struct auth_cred acred, int flags)
	41	{
	42	return get_rpccred(&null_cred);
	43	}
	44
	45	/*
	46	* Destroy cred handle.
	47	*/
	48	static void
	49	nul_destroy_cred(struct rpc_cred *cred)
	50	{
	51	}
	52
	53	/*
	54	* Match cred handle against current process
	55	*/
	56	static int
	57	nul_match(struct auth_cred acred, struct rpc_cred cred, int taskflags)
	58	{
	59	return 1;
	60	}
	61
	62	/*
	63	* Marshal credential.
	64	*/
65	static u32 *
66	nul_marshal(struct rpc_task task, u32 p)
67	{
68	*p++ = htonl(RPC_AUTH_NULL);
69	*p++ = 0;
70	*p++ = htonl(RPC_AUTH_NULL);
71	*p++ = 0;
72
73	return p;
74	}
75
76	/*
77	* Refresh credential. This is a no-op for AUTH_NULL
78	*/
79	static int
80	nul_refresh(struct rpc_task *task)
81	{
82	task->tk_msg.rpc_cred->cr_flags \|= RPCAUTH_CRED_UPTODATE;
83	return 0;
84	}
85
86	static u32 *
87	nul_validate(struct rpc_task task, u32 p)
88	{
89	rpc_authflavor_t flavor;
90	u32 size;
91
92	flavor = ntohl(*p++);
93	if (flavor != RPC_AUTH_NULL) {
94	printk("RPC: bad verf flavor: %u\n", flavor);
95	return NULL;
96	}
97
98	size = ntohl(*p++);
99	if (size != 0) {
100	printk("RPC: bad verf size: %u\n", size);
101	return NULL;
102	}
103
104	return p;
105	}
106
107	struct rpc_authops authnull_ops = {
108	.owner = THIS_MODULE,
109	.au_flavor = RPC_AUTH_NULL,
110	#ifdef RPC_DEBUG
111	.au_name = "NULL",
112	#endif
113	.create = nul_create,
114	.destroy = nul_destroy,
115	.lookup_cred = nul_lookup_cred,
116	};
117
118	static
119	struct rpc_auth null_auth = {
120	.au_cslack = 4,
121	.au_rslack = 2,
122	.au_ops = &authnull_ops,
123	};
124
125	static
126	struct rpc_credops null_credops = {
127	.cr_name = "AUTH_NULL",
128	.crdestroy = nul_destroy_cred,
129	.crmatch = nul_match,
130	.crmarshal = nul_marshal,
131	.crrefresh = nul_refresh,
132	.crvalidate = nul_validate,
133	};
134
135	static
136	struct rpc_cred null_cred = {
137	.cr_ops = &null_credops,
138	.cr_count = ATOMIC_INIT(1),
139	.cr_flags = RPCAUTH_CRED_UPTODATE,
140	#ifdef RPC_DEBUG
141	.cr_magic = RPCAUTH_CRED_MAGIC,
142	#endif
143	};