/*
|
/*
|
* linux/net/sunrpc/pmap.c
|
* linux/net/sunrpc/pmap.c
|
*
|
*
|
* Portmapper client.
|
* Portmapper client.
|
*
|
*
|
* FIXME: In a secure environment, we may want to use an authentication
|
* FIXME: In a secure environment, we may want to use an authentication
|
* flavor other than AUTH_NULL.
|
* flavor other than AUTH_NULL.
|
*
|
*
|
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
|
* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
|
*/
|
*/
|
|
|
#include <linux/config.h>
|
#include <linux/config.h>
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/socket.h>
|
#include <linux/socket.h>
|
#include <linux/kernel.h>
|
#include <linux/kernel.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/uio.h>
|
#include <linux/uio.h>
|
#include <linux/in.h>
|
#include <linux/in.h>
|
#include <linux/sunrpc/clnt.h>
|
#include <linux/sunrpc/clnt.h>
|
#include <linux/sunrpc/xprt.h>
|
#include <linux/sunrpc/xprt.h>
|
#include <linux/sunrpc/sched.h>
|
#include <linux/sunrpc/sched.h>
|
|
|
#ifdef RPC_DEBUG
|
#ifdef RPC_DEBUG
|
# define RPCDBG_FACILITY RPCDBG_PMAP
|
# define RPCDBG_FACILITY RPCDBG_PMAP
|
#endif
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#endif
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|
|
#define PMAP_SET 1
|
#define PMAP_SET 1
|
#define PMAP_UNSET 2
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#define PMAP_UNSET 2
|
#define PMAP_GETPORT 3
|
#define PMAP_GETPORT 3
|
|
|
static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int);
|
static struct rpc_clnt * pmap_create(char *, struct sockaddr_in *, int);
|
static void pmap_getport_done(struct rpc_task *);
|
static void pmap_getport_done(struct rpc_task *);
|
extern struct rpc_program pmap_program;
|
extern struct rpc_program pmap_program;
|
static spinlock_t pmap_lock = SPIN_LOCK_UNLOCKED;
|
static spinlock_t pmap_lock = SPIN_LOCK_UNLOCKED;
|
|
|
/*
|
/*
|
* Obtain the port for a given RPC service on a given host. This one can
|
* Obtain the port for a given RPC service on a given host. This one can
|
* be called for an ongoing RPC request.
|
* be called for an ongoing RPC request.
|
*/
|
*/
|
void
|
void
|
rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
|
rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
|
{
|
{
|
struct rpc_portmap *map = &clnt->cl_pmap;
|
struct rpc_portmap *map = &clnt->cl_pmap;
|
struct sockaddr_in *sap = &clnt->cl_xprt->addr;
|
struct sockaddr_in *sap = &clnt->cl_xprt->addr;
|
struct rpc_message msg = { PMAP_GETPORT, map, &clnt->cl_port, NULL };
|
struct rpc_message msg = { PMAP_GETPORT, map, &clnt->cl_port, NULL };
|
struct rpc_clnt *pmap_clnt;
|
struct rpc_clnt *pmap_clnt;
|
struct rpc_task *child;
|
struct rpc_task *child;
|
|
|
dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n",
|
dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n",
|
task->tk_pid, clnt->cl_server,
|
task->tk_pid, clnt->cl_server,
|
map->pm_prog, map->pm_vers, map->pm_prot);
|
map->pm_prog, map->pm_vers, map->pm_prot);
|
|
|
spin_lock(&pmap_lock);
|
spin_lock(&pmap_lock);
|
if (clnt->cl_binding) {
|
if (clnt->cl_binding) {
|
rpc_sleep_on(&clnt->cl_bindwait, task, NULL, 0);
|
rpc_sleep_on(&clnt->cl_bindwait, task, NULL, 0);
|
spin_unlock(&pmap_lock);
|
spin_unlock(&pmap_lock);
|
return;
|
return;
|
}
|
}
|
clnt->cl_binding = 1;
|
clnt->cl_binding = 1;
|
spin_unlock(&pmap_lock);
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spin_unlock(&pmap_lock);
|
|
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task->tk_status = -EACCES; /* why set this? returns -EIO below */
|
task->tk_status = -EACCES; /* why set this? returns -EIO below */
|
if (!(pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot)))
|
if (!(pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot)))
|
goto bailout;
|
goto bailout;
|
task->tk_status = 0;
|
task->tk_status = 0;
|
|
|
/*
|
/*
|
* Note: rpc_new_child will release client after a failure.
|
* Note: rpc_new_child will release client after a failure.
|
*/
|
*/
|
if (!(child = rpc_new_child(pmap_clnt, task)))
|
if (!(child = rpc_new_child(pmap_clnt, task)))
|
goto bailout;
|
goto bailout;
|
|
|
/* Setup the call info struct */
|
/* Setup the call info struct */
|
rpc_call_setup(child, &msg, 0);
|
rpc_call_setup(child, &msg, 0);
|
|
|
/* ... and run the child task */
|
/* ... and run the child task */
|
rpc_run_child(task, child, pmap_getport_done);
|
rpc_run_child(task, child, pmap_getport_done);
|
return;
|
return;
|
|
|
bailout:
|
bailout:
|
spin_lock(&pmap_lock);
|
spin_lock(&pmap_lock);
|
clnt->cl_binding = 0;
|
clnt->cl_binding = 0;
|
rpc_wake_up(&clnt->cl_bindwait);
|
rpc_wake_up(&clnt->cl_bindwait);
|
spin_unlock(&pmap_lock);
|
spin_unlock(&pmap_lock);
|
task->tk_status = -EIO;
|
task->tk_status = -EIO;
|
task->tk_action = NULL;
|
task->tk_action = NULL;
|
}
|
}
|
|
|
#ifdef CONFIG_ROOT_NFS
|
#ifdef CONFIG_ROOT_NFS
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int
|
int
|
rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
|
rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
|
{
|
{
|
struct rpc_portmap map = { prog, vers, prot, 0 };
|
struct rpc_portmap map = { prog, vers, prot, 0 };
|
struct rpc_clnt *pmap_clnt;
|
struct rpc_clnt *pmap_clnt;
|
char hostname[32];
|
char hostname[32];
|
int status;
|
int status;
|
|
|
dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %d, %d, %d)\n",
|
dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %d, %d, %d)\n",
|
NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
|
NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
|
|
|
sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
|
sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
|
if (!(pmap_clnt = pmap_create(hostname, sin, prot)))
|
if (!(pmap_clnt = pmap_create(hostname, sin, prot)))
|
return -EACCES;
|
return -EACCES;
|
|
|
/* Setup the call info struct */
|
/* Setup the call info struct */
|
status = rpc_call(pmap_clnt, PMAP_GETPORT, &map, &map.pm_port, 0);
|
status = rpc_call(pmap_clnt, PMAP_GETPORT, &map, &map.pm_port, 0);
|
|
|
if (status >= 0) {
|
if (status >= 0) {
|
if (map.pm_port != 0)
|
if (map.pm_port != 0)
|
return map.pm_port;
|
return map.pm_port;
|
status = -EACCES;
|
status = -EACCES;
|
}
|
}
|
return status;
|
return status;
|
}
|
}
|
#endif
|
#endif
|
|
|
static void
|
static void
|
pmap_getport_done(struct rpc_task *task)
|
pmap_getport_done(struct rpc_task *task)
|
{
|
{
|
struct rpc_clnt *clnt = task->tk_client;
|
struct rpc_clnt *clnt = task->tk_client;
|
|
|
dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n",
|
dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n",
|
task->tk_pid, task->tk_status, clnt->cl_port);
|
task->tk_pid, task->tk_status, clnt->cl_port);
|
if (task->tk_status < 0) {
|
if (task->tk_status < 0) {
|
/* Make the calling task exit with an error */
|
/* Make the calling task exit with an error */
|
task->tk_action = NULL;
|
task->tk_action = NULL;
|
} else if (clnt->cl_port == 0) {
|
} else if (clnt->cl_port == 0) {
|
/* Program not registered */
|
/* Program not registered */
|
task->tk_status = -EACCES;
|
task->tk_status = -EACCES;
|
task->tk_action = NULL;
|
task->tk_action = NULL;
|
} else {
|
} else {
|
/* byte-swap port number first */
|
/* byte-swap port number first */
|
clnt->cl_port = htons(clnt->cl_port);
|
clnt->cl_port = htons(clnt->cl_port);
|
clnt->cl_xprt->addr.sin_port = clnt->cl_port;
|
clnt->cl_xprt->addr.sin_port = clnt->cl_port;
|
}
|
}
|
spin_lock(&pmap_lock);
|
spin_lock(&pmap_lock);
|
clnt->cl_binding = 0;
|
clnt->cl_binding = 0;
|
rpc_wake_up(&clnt->cl_bindwait);
|
rpc_wake_up(&clnt->cl_bindwait);
|
spin_unlock(&pmap_lock);
|
spin_unlock(&pmap_lock);
|
}
|
}
|
|
|
/*
|
/*
|
* Set or unset a port registration with the local portmapper.
|
* Set or unset a port registration with the local portmapper.
|
* port == 0 means unregister, port != 0 means register.
|
* port == 0 means unregister, port != 0 means register.
|
*/
|
*/
|
int
|
int
|
rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
|
rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
|
{
|
{
|
struct sockaddr_in sin;
|
struct sockaddr_in sin;
|
struct rpc_portmap map;
|
struct rpc_portmap map;
|
struct rpc_clnt *pmap_clnt;
|
struct rpc_clnt *pmap_clnt;
|
unsigned int error = 0;
|
unsigned int error = 0;
|
|
|
dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n",
|
dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n",
|
prog, vers, prot, port);
|
prog, vers, prot, port);
|
|
|
sin.sin_family = AF_INET;
|
sin.sin_family = AF_INET;
|
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
if (!(pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP))) {
|
if (!(pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP))) {
|
dprintk("RPC: couldn't create pmap client\n");
|
dprintk("RPC: couldn't create pmap client\n");
|
return -EACCES;
|
return -EACCES;
|
}
|
}
|
|
|
map.pm_prog = prog;
|
map.pm_prog = prog;
|
map.pm_vers = vers;
|
map.pm_vers = vers;
|
map.pm_prot = prot;
|
map.pm_prot = prot;
|
map.pm_port = port;
|
map.pm_port = port;
|
|
|
error = rpc_call(pmap_clnt, port? PMAP_SET : PMAP_UNSET,
|
error = rpc_call(pmap_clnt, port? PMAP_SET : PMAP_UNSET,
|
&map, okay, 0);
|
&map, okay, 0);
|
|
|
if (error < 0) {
|
if (error < 0) {
|
printk(KERN_WARNING
|
printk(KERN_WARNING
|
"RPC: failed to contact portmap (errno %d).\n",
|
"RPC: failed to contact portmap (errno %d).\n",
|
error);
|
error);
|
}
|
}
|
dprintk("RPC: registration status %d/%d\n", error, *okay);
|
dprintk("RPC: registration status %d/%d\n", error, *okay);
|
|
|
/* Client deleted automatically because cl_oneshot == 1 */
|
/* Client deleted automatically because cl_oneshot == 1 */
|
return error;
|
return error;
|
}
|
}
|
|
|
static struct rpc_clnt *
|
static struct rpc_clnt *
|
pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto)
|
pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto)
|
{
|
{
|
struct rpc_xprt *xprt;
|
struct rpc_xprt *xprt;
|
struct rpc_clnt *clnt;
|
struct rpc_clnt *clnt;
|
|
|
/* printk("pmap: create xprt\n"); */
|
/* printk("pmap: create xprt\n"); */
|
if (!(xprt = xprt_create_proto(proto, srvaddr, NULL)))
|
if (!(xprt = xprt_create_proto(proto, srvaddr, NULL)))
|
return NULL;
|
return NULL;
|
xprt->addr.sin_port = htons(RPC_PMAP_PORT);
|
xprt->addr.sin_port = htons(RPC_PMAP_PORT);
|
|
|
/* printk("pmap: create clnt\n"); */
|
/* printk("pmap: create clnt\n"); */
|
clnt = rpc_create_client(xprt, hostname,
|
clnt = rpc_create_client(xprt, hostname,
|
&pmap_program, RPC_PMAP_VERSION,
|
&pmap_program, RPC_PMAP_VERSION,
|
RPC_AUTH_NULL);
|
RPC_AUTH_NULL);
|
if (!clnt) {
|
if (!clnt) {
|
xprt_destroy(xprt);
|
xprt_destroy(xprt);
|
} else {
|
} else {
|
clnt->cl_softrtry = 1;
|
clnt->cl_softrtry = 1;
|
clnt->cl_chatty = 1;
|
clnt->cl_chatty = 1;
|
clnt->cl_oneshot = 1;
|
clnt->cl_oneshot = 1;
|
}
|
}
|
return clnt;
|
return clnt;
|
}
|
}
|
|
|
/*
|
/*
|
* XDR encode/decode functions for PMAP
|
* XDR encode/decode functions for PMAP
|
*/
|
*/
|
static int
|
static int
|
xdr_error(struct rpc_rqst *req, u32 *p, void *dummy)
|
xdr_error(struct rpc_rqst *req, u32 *p, void *dummy)
|
{
|
{
|
return -EIO;
|
return -EIO;
|
}
|
}
|
|
|
static int
|
static int
|
xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map)
|
xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map)
|
{
|
{
|
dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n",
|
dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n",
|
map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
|
map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
|
*p++ = htonl(map->pm_prog);
|
*p++ = htonl(map->pm_prog);
|
*p++ = htonl(map->pm_vers);
|
*p++ = htonl(map->pm_vers);
|
*p++ = htonl(map->pm_prot);
|
*p++ = htonl(map->pm_prot);
|
*p++ = htonl(map->pm_port);
|
*p++ = htonl(map->pm_port);
|
|
|
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int
|
static int
|
xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp)
|
xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp)
|
{
|
{
|
*portp = (unsigned short) ntohl(*p++);
|
*portp = (unsigned short) ntohl(*p++);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int
|
static int
|
xdr_decode_bool(struct rpc_rqst *req, u32 *p, unsigned int *boolp)
|
xdr_decode_bool(struct rpc_rqst *req, u32 *p, unsigned int *boolp)
|
{
|
{
|
*boolp = (unsigned int) ntohl(*p++);
|
*boolp = (unsigned int) ntohl(*p++);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct rpc_procinfo pmap_procedures[4] = {
|
static struct rpc_procinfo pmap_procedures[4] = {
|
{ "pmap_null",
|
{ "pmap_null",
|
(kxdrproc_t) xdr_error,
|
(kxdrproc_t) xdr_error,
|
(kxdrproc_t) xdr_error, 0, 0 },
|
(kxdrproc_t) xdr_error, 0, 0 },
|
{ "pmap_set",
|
{ "pmap_set",
|
(kxdrproc_t) xdr_encode_mapping,
|
(kxdrproc_t) xdr_encode_mapping,
|
(kxdrproc_t) xdr_decode_bool, 4, 1 },
|
(kxdrproc_t) xdr_decode_bool, 4, 1 },
|
{ "pmap_unset",
|
{ "pmap_unset",
|
(kxdrproc_t) xdr_encode_mapping,
|
(kxdrproc_t) xdr_encode_mapping,
|
(kxdrproc_t) xdr_decode_bool, 4, 1 },
|
(kxdrproc_t) xdr_decode_bool, 4, 1 },
|
{ "pmap_get",
|
{ "pmap_get",
|
(kxdrproc_t) xdr_encode_mapping,
|
(kxdrproc_t) xdr_encode_mapping,
|
(kxdrproc_t) xdr_decode_port, 4, 1 },
|
(kxdrproc_t) xdr_decode_port, 4, 1 },
|
};
|
};
|
|
|
static struct rpc_version pmap_version2 = {
|
static struct rpc_version pmap_version2 = {
|
2, 4, pmap_procedures
|
2, 4, pmap_procedures
|
};
|
};
|
|
|
static struct rpc_version * pmap_version[] = {
|
static struct rpc_version * pmap_version[] = {
|
NULL,
|
NULL,
|
NULL,
|
NULL,
|
&pmap_version2,
|
&pmap_version2,
|
};
|
};
|
|
|
static struct rpc_stat pmap_stats;
|
static struct rpc_stat pmap_stats;
|
|
|
struct rpc_program pmap_program = {
|
struct rpc_program pmap_program = {
|
"portmap",
|
"portmap",
|
RPC_PMAP_PROGRAM,
|
RPC_PMAP_PROGRAM,
|
sizeof(pmap_version)/sizeof(pmap_version[0]),
|
sizeof(pmap_version)/sizeof(pmap_version[0]),
|
pmap_version,
|
pmap_version,
|
&pmap_stats,
|
&pmap_stats,
|
};
|
};
|
|
|
