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/
usr/
src/
linux-headers-3.0.0-14/
include/
linux/
sunrpc/
- drwxr-xr-x
|
Viewing file:  svcauth.h (5.55 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
* linux/include/linux/sunrpc/svcauth.h
*
* RPC server-side authentication stuff.
*
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
*/
#ifndef _LINUX_SUNRPC_SVCAUTH_H_
#define _LINUX_SUNRPC_SVCAUTH_H_
#ifdef __KERNEL__
#include <linux/string.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/cache.h>
#include <linux/hash.h>
#define SVC_CRED_NGROUPS 32
struct svc_cred {
uid_t cr_uid;
gid_t cr_gid;
struct group_info *cr_group_info;
};
struct svc_rqst; /* forward decl */
struct in6_addr;
/* Authentication is done in the context of a domain.
*
* Currently, the nfs server uses the auth_domain to stand
* for the "client" listed in /etc/exports.
*
* More generally, a domain might represent a group of clients using
* a common mechanism for authentication and having a common mapping
* between local identity (uid) and network identity. All clients
* in a domain have similar general access rights. Each domain can
* contain multiple principals which will have different specific right
* based on normal Discretionary Access Control.
*
* A domain is created by an authentication flavour module based on name
* only. Userspace then fills in detail on demand.
*
* In the case of auth_unix and auth_null, the auth_domain is also
* associated with entries in another cache representing the mapping
* of ip addresses to the given client.
*/
struct auth_domain {
struct kref ref;
struct hlist_node hash;
char *name;
struct auth_ops *flavour;
};
/*
* Each authentication flavour registers an auth_ops
* structure.
* name is simply the name.
* flavour gives the auth flavour. It determines where the flavour is registered
* accept() is given a request and should verify it.
* It should inspect the authenticator and verifier, and possibly the data.
* If there is a problem with the authentication *authp should be set.
* The return value of accept() can indicate:
* OK - authorised. client and credential are set in rqstp.
* reqbuf points to arguments
* resbuf points to good place for results. verfier
* is (probably) already in place. Certainly space is
* reserved for it.
* DROP - simply drop the request. It may have been deferred
* GARBAGE - rpc garbage_args error
* SYSERR - rpc system_err error
* DENIED - authp holds reason for denial.
* COMPLETE - the reply is encoded already and ready to be sent; no
* further processing is necessary. (This is used for processing
* null procedure calls which are used to set up encryption
* contexts.)
*
* accept is passed the proc number so that it can accept NULL rpc requests
* even if it cannot authenticate the client (as is sometimes appropriate).
*
* release() is given a request after the procedure has been run.
* It should sign/encrypt the results if needed
* It should return:
* OK - the resbuf is ready to be sent
* DROP - the reply should be quitely dropped
* DENIED - authp holds a reason for MSG_DENIED
* SYSERR - rpc system_err
*
* domain_release()
* This call releases a domain.
* set_client()
* Givens a pending request (struct svc_rqst), finds and assigns
* an appropriate 'auth_domain' as the client.
*/
struct auth_ops {
char * name;
struct module *owner;
int flavour;
int (*accept)(struct svc_rqst *rq, __be32 *authp);
int (*release)(struct svc_rqst *rq);
void (*domain_release)(struct auth_domain *);
int (*set_client)(struct svc_rqst *rq);
};
#define SVC_GARBAGE 1
#define SVC_SYSERR 2
#define SVC_VALID 3
#define SVC_NEGATIVE 4
#define SVC_OK 5
#define SVC_DROP 6
#define SVC_CLOSE 7 /* Like SVC_DROP, but request is definitely
* lost so if there is a tcp connection, it
* should be closed
*/
#define SVC_DENIED 8
#define SVC_PENDING 9
#define SVC_COMPLETE 10
struct svc_xprt;
extern int svc_authenticate(struct svc_rqst *rqstp, __be32 *authp);
extern int svc_authorise(struct svc_rqst *rqstp);
extern int svc_set_client(struct svc_rqst *rqstp);
extern int svc_auth_register(rpc_authflavor_t flavor, struct auth_ops *aops);
extern void svc_auth_unregister(rpc_authflavor_t flavor);
extern struct auth_domain *unix_domain_find(char *name);
extern void auth_domain_put(struct auth_domain *item);
extern int auth_unix_add_addr(struct net *net, struct in6_addr *addr, struct auth_domain *dom);
extern struct auth_domain *auth_domain_lookup(char *name, struct auth_domain *new);
extern struct auth_domain *auth_domain_find(char *name);
extern struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr);
extern int auth_unix_forget_old(struct auth_domain *dom);
extern void svcauth_unix_purge(void);
extern void svcauth_unix_info_release(struct svc_xprt *xpt);
extern int svcauth_unix_set_client(struct svc_rqst *rqstp);
static inline unsigned long hash_str(char *name, int bits)
{
unsigned long hash = 0;
unsigned long l = 0;
int len = 0;
unsigned char c;
do {
if (unlikely(!(c = *name++))) {
c = (char)len; len = -1;
}
l = (l << 8) | c;
len++;
if ((len & (BITS_PER_LONG/8-1))==0)
hash = hash_long(hash^l, BITS_PER_LONG);
} while (len);
return hash >> (BITS_PER_LONG - bits);
}
static inline unsigned long hash_mem(char *buf, int length, int bits)
{
unsigned long hash = 0;
unsigned long l = 0;
int len = 0;
unsigned char c;
do {
if (len == length) {
c = (char)len; len = -1;
} else
c = *buf++;
l = (l << 8) | c;
len++;
if ((len & (BITS_PER_LONG/8-1))==0)
hash = hash_long(hash^l, BITS_PER_LONG);
} while (len);
return hash >> (BITS_PER_LONG - bits);
}
#endif /* __KERNEL__ */
#endif /* _LINUX_SUNRPC_SVCAUTH_H_ */
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