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

/*
 * Copyright 2009, Oracle.  All rights reserved.
 *
 * Convert socket addresses to presentation addresses and universal
 * addresses, and vice versa.
 *
 * Universal addresses are introduced by RFC 1833 and further refined by
 * recent RFCs describing NFSv4.  The universal address format is part
 * of the external (network) interface provided by rpcbind version 3
 * and 4, and by NFSv4.  Such an address is a string containing a
 * presentation format IP address followed by a port number in
 * "hibyte.lobyte" format.
 *
 * IPv6 addresses can also include a scope ID, typically denoted by
 * a '%' followed by a device name or a non-negative integer.  Refer to
 * RFC 4291, Section 2.2 for details on IPv6 presentation formats.
 */

#include <net/ipv6.h>
#include <linux/sunrpc/clnt.h>
#include <linux/slab.h>

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)

static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
				  char *buf, const int buflen)
{
	const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
	const struct in6_addr *addr = &sin6->sin6_addr;

	/*
	 * RFC 4291, Section 2.2.2
	 *
	 * Shorthanded ANY address
	 */
	if (ipv6_addr_any(addr))
		return snprintf(buf, buflen, "::");

	/*
	 * RFC 4291, Section 2.2.2
	 *
	 * Shorthanded loopback address
	 */
	if (ipv6_addr_loopback(addr))
		return snprintf(buf, buflen, "::1");

	/*
	 * RFC 4291, Section 2.2.3
	 *
	 * Special presentation address format for mapped v4
	 * addresses.
	 */
	if (ipv6_addr_v4mapped(addr))
		return snprintf(buf, buflen, "::ffff:%pI4",
					&addr->s6_addr32[3]);

	/*
	 * RFC 4291, Section 2.2.1
	 */
	return snprintf(buf, buflen, "%pI6c", addr);
}

static size_t rpc_ntop6(const struct sockaddr *sap,
			char *buf, const size_t buflen)
{
	const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
	char scopebuf[IPV6_SCOPE_ID_LEN];
	size_t len;
	int rc;

	len = rpc_ntop6_noscopeid(sap, buf, buflen);
	if (unlikely(len == 0))
		return len;

	if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
		return len;
	if (sin6->sin6_scope_id == 0)
		return len;

	rc = snprintf(scopebuf, sizeof(scopebuf), "%c%u",
			IPV6_SCOPE_DELIMITER, sin6->sin6_scope_id);
	if (unlikely((size_t)rc > sizeof(scopebuf)))
		return 0;

	len += rc;
	if (unlikely(len > buflen))
		return 0;

	strcat(buf, scopebuf);
	return len;
}

#else	/* !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) */

static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
				  char *buf, const int buflen)
{
	return 0;
}

static size_t rpc_ntop6(const struct sockaddr *sap,
			char *buf, const size_t buflen)
{
	return 0;
}

#endif	/* !(defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) */

static int rpc_ntop4(const struct sockaddr *sap,
		     char *buf, const size_t buflen)
{
	const struct sockaddr_in *sin = (struct sockaddr_in *)sap;

	return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
}

/**
 * rpc_ntop - construct a presentation address in @buf
 * @sap: socket address
 * @buf: construction area
 * @buflen: size of @buf, in bytes
 *
 * Plants a %NUL-terminated string in @buf and returns the length
 * of the string, excluding the %NUL.  Otherwise zero is returned.
 */
size_t rpc_ntop(const struct sockaddr *sap, char *buf, const size_t buflen)
{
	switch (sap->sa_family) {
	case AF_INET:
		return rpc_ntop4(sap, buf, buflen);
	case AF_INET6:
		return rpc_ntop6(sap, buf, buflen);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(rpc_ntop);

static size_t rpc_pton4(const char *buf, const size_t buflen,
			struct sockaddr *sap, const size_t salen)
{
	struct sockaddr_in *sin = (struct sockaddr_in *)sap;
	u8 *addr = (u8 *)&sin->sin_addr.s_addr;

	if (buflen > INET_ADDRSTRLEN || salen < sizeof(struct sockaddr_in))
		return 0;

	memset(sap, 0, sizeof(struct sockaddr_in));

	if (in4_pton(buf, buflen, addr, '\0', NULL) == 0)
		return 0;

	sin->sin_family = AF_INET;
	return sizeof(struct sockaddr_in);;
}

#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static int rpc_parse_scope_id(const char *buf, const size_t buflen,
			      const char *delim, struct sockaddr_in6 *sin6)
{
	char *p;
	size_t len;

	if ((buf + buflen) == delim)
		return 1;

	if (*delim != IPV6_SCOPE_DELIMITER)
		return 0;

	if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
		return 0;

	len = (buf + buflen) - delim - 1;
	p = kstrndup(delim + 1, len, GFP_KERNEL);
	if (p) {
		unsigned long scope_id = 0;
		struct net_device *dev;

		dev = dev_get_by_name(&init_net, p);
		if (dev != NULL) {
			scope_id = dev->ifindex;
			dev_put(dev);
		} else {
			if (strict_strtoul(p, 10, &scope_id) == 0) {
				kfree(p);
				return 0;
			}
		}

		kfree(p);

		sin6->sin6_scope_id = scope_id;
		return 1;
	}

	return 0;
}

static size_t rpc_pton6(const char *buf, const size_t buflen,
			struct sockaddr *sap, const size_t salen)
{
	struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
	u8 *addr = (u8 *)&sin6->sin6_addr.in6_u;
	const char *delim;

	if (buflen > (INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN) ||
	    salen < sizeof(struct sockaddr_in6))
		return 0;

	memset(sap, 0, sizeof(struct sockaddr_in6));

	if (in6_pton(buf, buflen, addr, IPV6_SCOPE_DELIMITER, &delim) == 0)
		return 0;

	if (!rpc_parse_scope_id(buf, buflen, delim, sin6))
		return 0;

	sin6->sin6_family = AF_INET6;
	return sizeof(struct sockaddr_in6);
}
#else
static size_t rpc_pton6(const char *buf, const size_t buflen,
			struct sockaddr *sap, const size_t salen)
{
	return 0;
}
#endif

/**
 * rpc_pton - Construct a sockaddr in @sap
 * @buf: C string containing presentation format IP address
 * @buflen: length of presentation address in bytes
 * @sap: buffer into which to plant socket address
 * @salen: size of buffer in bytes
 *
 * Returns the size of the socket address if successful; otherwise
 * zero is returned.
 *
 * Plants a socket address in @sap and returns the size of the
 * socket address, if successful.  Returns zero if an error
 * occurred.
 */
size_t rpc_pton(const char *buf, const size_t buflen,
		struct sockaddr *sap, const size_t salen)
{
	unsigned int i;

	for (i = 0; i < buflen; i++)
		if (buf[i] == ':')
			return rpc_pton6(buf, buflen, sap, salen);
	return rpc_pton4(buf, buflen, sap, salen);
}
EXPORT_SYMBOL_GPL(rpc_pton);

/**
 * rpc_sockaddr2uaddr - Construct a universal address string from @sap.
 * @sap: socket address
 *
 * Returns a %NUL-terminated string in dynamically allocated memory;
 * otherwise NULL is returned if an error occurred.  Caller must
 * free the returned string.
 */
char *rpc_sockaddr2uaddr(const struct sockaddr *sap)
{
	char portbuf[RPCBIND_MAXUADDRPLEN];
	char addrbuf[RPCBIND_MAXUADDRLEN];
	unsigned short port;

	switch (sap->sa_family) {
	case AF_INET:
		if (rpc_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
			return NULL;
		port = ntohs(((struct sockaddr_in *)sap)->sin_port);
		break;
	case AF_INET6:
		if (rpc_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
			return NULL;
		port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
		break;
	default:
		return NULL;
	}

	if (snprintf(portbuf, sizeof(portbuf),
		     ".%u.%u", port >> 8, port & 0xff) > (int)sizeof(portbuf))
		return NULL;

	if (strlcat(addrbuf, portbuf, sizeof(addrbuf)) > sizeof(addrbuf))
		return NULL;

	return kstrdup(addrbuf, GFP_KERNEL);
}
EXPORT_SYMBOL_GPL(rpc_sockaddr2uaddr);

/**
 * rpc_uaddr2sockaddr - convert a universal address to a socket address.
 * @uaddr: C string containing universal address to convert
 * @uaddr_len: length of universal address string
 * @sap: buffer into which to plant socket address
 * @salen: size of buffer
 *
 * @uaddr does not have to be '\0'-terminated, but strict_strtoul() and
 * rpc_pton() require proper string termination to be successful.
 *
 * Returns the size of the socket address if successful; otherwise
 * zero is returned.
 */
size_t rpc_uaddr2sockaddr(const char *uaddr, const size_t uaddr_len,
			  struct sockaddr *sap, const size_t salen)
{
	char *c, buf[RPCBIND_MAXUADDRLEN + sizeof('\0')];
	unsigned long portlo, porthi;
	unsigned short port;

	if (uaddr_len > RPCBIND_MAXUADDRLEN)
		return 0;

	memcpy(buf, uaddr, uaddr_len);

	buf[uaddr_len] = '\0';
	c = strrchr(buf, '.');
	if (unlikely(c == NULL))
		return 0;
	if (unlikely(strict_strtoul(c + 1, 10, &portlo) != 0))
		return 0;
	if (unlikely(portlo > 255))
		return 0;

	*c = '\0';
	c = strrchr(buf, '.');
	if (unlikely(c == NULL))
		return 0;
	if (unlikely(strict_strtoul(c + 1, 10, &porthi) != 0))
		return 0;
	if (unlikely(porthi > 255))
		return 0;

	port = (unsigned short)((porthi << 8) | portlo);

	*c = '\0';
	if (rpc_pton(buf, strlen(buf), sap, salen) == 0)
		return 0;

	switch (sap->sa_family) {
	case AF_INET:
		((struct sockaddr_in *)sap)->sin_port = htons(port);
		return sizeof(struct sockaddr_in);
	case AF_INET6:
		((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
		return sizeof(struct sockaddr_in6);
	}

	return 0;
}
EXPORT_SYMBOL_GPL(rpc_uaddr2sockaddr);
Commit	Line	Data
a02d6926 CL	1	/*
	2	* Copyright 2009, Oracle. All rights reserved.
	3	*
	4	* Convert socket addresses to presentation addresses and universal
	5	* addresses, and vice versa.
	6	*
	7	* Universal addresses are introduced by RFC 1833 and further refined by
	8	* recent RFCs describing NFSv4. The universal address format is part
	9	* of the external (network) interface provided by rpcbind version 3
	10	* and 4, and by NFSv4. Such an address is a string containing a
	11	* presentation format IP address followed by a port number in
	12	* "hibyte.lobyte" format.
	13	*
	14	* IPv6 addresses can also include a scope ID, typically denoted by
	15	* a '%' followed by a device name or a non-negative integer. Refer to
	16	* RFC 4291, Section 2.2 for details on IPv6 presentation formats.
	17	*/
	18
	19	#include <net/ipv6.h>
	20	#include <linux/sunrpc/clnt.h>
5a0e3ad6	21	#include <linux/slab.h>
a02d6926 CL	22
	23	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	24
	25	static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
	26	char *buf, const int buflen)
	27	{
	28	const struct sockaddr_in6 sin6 = (struct sockaddr_in6 )sap;
	29	const struct in6_addr *addr = &sin6->sin6_addr;
	30
	31	/*
	32	* RFC 4291, Section 2.2.2
	33	*
	34	* Shorthanded ANY address
	35	*/
	36	if (ipv6_addr_any(addr))
	37	return snprintf(buf, buflen, "::");
	38
	39	/*
	40	* RFC 4291, Section 2.2.2
	41	*
	42	* Shorthanded loopback address
	43	*/
	44	if (ipv6_addr_loopback(addr))
	45	return snprintf(buf, buflen, "::1");
	46
	47	/*
	48	* RFC 4291, Section 2.2.3
	49	*
	50	* Special presentation address format for mapped v4
	51	* addresses.
	52	*/
	53	if (ipv6_addr_v4mapped(addr))
	54	return snprintf(buf, buflen, "::ffff:%pI4",
	55	&addr->s6_addr32[3]);
	56
	57	/*
	58	* RFC 4291, Section 2.2.1
a02d6926	59	*/
dd1fd90f	60	return snprintf(buf, buflen, "%pI6c", addr);
a02d6926 CL	61	}
	62
	63	static size_t rpc_ntop6(const struct sockaddr *sap,
	64	char *buf, const size_t buflen)
	65	{
	66	const struct sockaddr_in6 sin6 = (struct sockaddr_in6 )sap;
	67	char scopebuf[IPV6_SCOPE_ID_LEN];
	68	size_t len;
	69	int rc;
	70
	71	len = rpc_ntop6_noscopeid(sap, buf, buflen);
	72	if (unlikely(len == 0))
	73	return len;
	74
f1a89a11	75	if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
a02d6926	76	return len;
7a88efe9 CL	77	if (sin6->sin6_scope_id == 0)
7a88efe9 CL	78	return len;
a02d6926 CL	79
	80	rc = snprintf(scopebuf, sizeof(scopebuf), "%c%u",
	81	IPV6_SCOPE_DELIMITER, sin6->sin6_scope_id);
	82	if (unlikely((size_t)rc > sizeof(scopebuf)))
	83	return 0;
	84
	85	len += rc;
	86	if (unlikely(len > buflen))
	87	return 0;
	88
	89	strcat(buf, scopebuf);
	90	return len;
	91	}
	92
	93	#else /* !(defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)) */
	94
	95	static size_t rpc_ntop6_noscopeid(const struct sockaddr *sap,
	96	char *buf, const int buflen)
	97	{
	98	return 0;
	99	}
	100
	101	static size_t rpc_ntop6(const struct sockaddr *sap,
	102	char *buf, const size_t buflen)
	103	{
	104	return 0;
	105	}
	106
	107	#endif /* !(defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)) */
	108
	109	static int rpc_ntop4(const struct sockaddr *sap,
	110	char *buf, const size_t buflen)
	111	{
	112	const struct sockaddr_in sin = (struct sockaddr_in )sap;
	113
	114	return snprintf(buf, buflen, "%pI4", &sin->sin_addr);
	115	}
	116
	117	/**
	118	* rpc_ntop - construct a presentation address in @buf
	119	* @sap: socket address
	120	* @buf: construction area
	121	* @buflen: size of @buf, in bytes
	122	*
	123	* Plants a %NUL-terminated string in @buf and returns the length
	124	* of the string, excluding the %NUL. Otherwise zero is returned.
	125	*/
	126	size_t rpc_ntop(const struct sockaddr sap, char buf, const size_t buflen)
	127	{
	128	switch (sap->sa_family) {
	129	case AF_INET:
	130	return rpc_ntop4(sap, buf, buflen);
	131	case AF_INET6:
	132	return rpc_ntop6(sap, buf, buflen);
	133	}
	134
	135	return 0;
	136	}
	137	EXPORT_SYMBOL_GPL(rpc_ntop);
	138
	139	static size_t rpc_pton4(const char *buf, const size_t buflen,
	140	struct sockaddr *sap, const size_t salen)
	141	{
	142	struct sockaddr_in sin = (struct sockaddr_in )sap;
143	u8 addr = (u8 )&sin->sin_addr.s_addr;
144
145	if (buflen > INET_ADDRSTRLEN \|\| salen < sizeof(struct sockaddr_in))
146	return 0;
147
148	memset(sap, 0, sizeof(struct sockaddr_in));
149
150	if (in4_pton(buf, buflen, addr, '\0', NULL) == 0)
151	return 0;
152
153	sin->sin_family = AF_INET;
154	return sizeof(struct sockaddr_in);;
155	}
156
157	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
158	static int rpc_parse_scope_id(const char *buf, const size_t buflen,
159	const char delim, struct sockaddr_in6 sin6)
160	{
161	char *p;
162	size_t len;
163
164	if ((buf + buflen) == delim)
165	return 1;
166
167	if (*delim != IPV6_SCOPE_DELIMITER)
168	return 0;
169
f1a89a11	170	if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
a02d6926 CL	171	return 0;
	172
	173	len = (buf + buflen) - delim - 1;
	174	p = kstrndup(delim + 1, len, GFP_KERNEL);
	175	if (p) {
	176	unsigned long scope_id = 0;
	177	struct net_device *dev;
	178
	179	dev = dev_get_by_name(&init_net, p);
	180	if (dev != NULL) {
	181	scope_id = dev->ifindex;
	182	dev_put(dev);
	183	} else {
	184	if (strict_strtoul(p, 10, &scope_id) == 0) {
	185	kfree(p);
	186	return 0;
	187	}
	188	}
	189
	190	kfree(p);
	191
	192	sin6->sin6_scope_id = scope_id;
	193	return 1;
	194	}
	195
	196	return 0;
	197	}
	198
	199	static size_t rpc_pton6(const char *buf, const size_t buflen,
	200	struct sockaddr *sap, const size_t salen)
	201	{
	202	struct sockaddr_in6 sin6 = (struct sockaddr_in6 )sap;
	203	u8 addr = (u8 )&sin6->sin6_addr.in6_u;
	204	const char *delim;
	205
	206	if (buflen > (INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN) \|\|
	207	salen < sizeof(struct sockaddr_in6))
	208	return 0;
	209
	210	memset(sap, 0, sizeof(struct sockaddr_in6));
	211
	212	if (in6_pton(buf, buflen, addr, IPV6_SCOPE_DELIMITER, &delim) == 0)
	213	return 0;
	214
	215	if (!rpc_parse_scope_id(buf, buflen, delim, sin6))
	216	return 0;
	217
	218	sin6->sin6_family = AF_INET6;
	219	return sizeof(struct sockaddr_in6);
	220	}
	221	#else
	222	static size_t rpc_pton6(const char *buf, const size_t buflen,
	223	struct sockaddr *sap, const size_t salen)
	224	{
	225	return 0;
	226	}
	227	#endif
	228
	229	/**
	230	* rpc_pton - Construct a sockaddr in @sap
	231	* @buf: C string containing presentation format IP address
	232	* @buflen: length of presentation address in bytes
	233	* @sap: buffer into which to plant socket address
	234	* @salen: size of buffer in bytes
235	*
236	* Returns the size of the socket address if successful; otherwise
237	* zero is returned.
238	*
239	* Plants a socket address in @sap and returns the size of the
240	* socket address, if successful. Returns zero if an error
241	* occurred.
242	*/
243	size_t rpc_pton(const char *buf, const size_t buflen,
244	struct sockaddr *sap, const size_t salen)
245	{
246	unsigned int i;
247
248	for (i = 0; i < buflen; i++)
249	if (buf[i] == ':')
250	return rpc_pton6(buf, buflen, sap, salen);
251	return rpc_pton4(buf, buflen, sap, salen);
252	}
253	EXPORT_SYMBOL_GPL(rpc_pton);
254
255	/**
256	* rpc_sockaddr2uaddr - Construct a universal address string from @sap.
257	* @sap: socket address
258	*
259	* Returns a %NUL-terminated string in dynamically allocated memory;
260	* otherwise NULL is returned if an error occurred. Caller must
261	* free the returned string.
262	*/
263	char rpc_sockaddr2uaddr(const struct sockaddr sap)
264	{
265	char portbuf[RPCBIND_MAXUADDRPLEN];
266	char addrbuf[RPCBIND_MAXUADDRLEN];
267	unsigned short port;
268
269	switch (sap->sa_family) {
270	case AF_INET:
271	if (rpc_ntop4(sap, addrbuf, sizeof(addrbuf)) == 0)
272	return NULL;
273	port = ntohs(((struct sockaddr_in *)sap)->sin_port);
274	break;
275	case AF_INET6:
276	if (rpc_ntop6_noscopeid(sap, addrbuf, sizeof(addrbuf)) == 0)
277	return NULL;
278	port = ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
279	break;
280	default:
281	return NULL;
282	}
283
284	if (snprintf(portbuf, sizeof(portbuf),
285	".%u.%u", port >> 8, port & 0xff) > (int)sizeof(portbuf))
286	return NULL;
287
288	if (strlcat(addrbuf, portbuf, sizeof(addrbuf)) > sizeof(addrbuf))
289	return NULL;
290
291	return kstrdup(addrbuf, GFP_KERNEL);
292	}
293	EXPORT_SYMBOL_GPL(rpc_sockaddr2uaddr);
294
295	/**
296	* rpc_uaddr2sockaddr - convert a universal address to a socket address.
297	* @uaddr: C string containing universal address to convert
298	* @uaddr_len: length of universal address string
299	* @sap: buffer into which to plant socket address
300	* @salen: size of buffer
301	*
1e360a60 CL	302	* @uaddr does not have to be '\0'-terminated, but strict_strtoul() and
	303	* rpc_pton() require proper string termination to be successful.
	304	*
a02d6926 CL	305	* Returns the size of the socket address if successful; otherwise
	306	* zero is returned.
	307	*/
	308	size_t rpc_uaddr2sockaddr(const char *uaddr, const size_t uaddr_len,
	309	struct sockaddr *sap, const size_t salen)
	310	{
1e360a60	311	char *c, buf[RPCBIND_MAXUADDRLEN + sizeof('\0')];
a02d6926 CL	312	unsigned long portlo, porthi;
	313	unsigned short port;
	314
1e360a60	315	if (uaddr_len > RPCBIND_MAXUADDRLEN)
a02d6926 CL	316	return 0;
	317
	318	memcpy(buf, uaddr, uaddr_len);
	319
1e360a60	320	buf[uaddr_len] = '\0';
a02d6926 CL	321	c = strrchr(buf, '.');
	322	if (unlikely(c == NULL))
	323	return 0;
	324	if (unlikely(strict_strtoul(c + 1, 10, &portlo) != 0))
	325	return 0;
	326	if (unlikely(portlo > 255))
	327	return 0;
	328
1e360a60	329	*c = '\0';
a02d6926 CL	330	c = strrchr(buf, '.');
	331	if (unlikely(c == NULL))
	332	return 0;
	333	if (unlikely(strict_strtoul(c + 1, 10, &porthi) != 0))
	334	return 0;
	335	if (unlikely(porthi > 255))
	336	return 0;
	337
	338	port = (unsigned short)((porthi << 8) \| portlo);
	339
1e360a60	340	*c = '\0';
a02d6926 CL	341	if (rpc_pton(buf, strlen(buf), sap, salen) == 0)
	342	return 0;
	343
	344	switch (sap->sa_family) {
	345	case AF_INET:
	346	((struct sockaddr_in *)sap)->sin_port = htons(port);
	347	return sizeof(struct sockaddr_in);
	348	case AF_INET6:
	349	((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
	350	return sizeof(struct sockaddr_in6);
	351	}
	352
	353	return 0;
	354	}
	355	EXPORT_SYMBOL_GPL(rpc_uaddr2sockaddr);