mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-06 02:50:43 +00:00
![Jeff Layton](/assets/img/avatar_default.png)
These routines are used by server and client code, so having them in a separate header would be best. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/*
|
|
* linux/include/linux/sunrpc/addr.h
|
|
*
|
|
* Various routines for copying and comparing sockaddrs and for
|
|
* converting them to and from presentation format.
|
|
*/
|
|
#ifndef _LINUX_SUNRPC_ADDR_H
|
|
#define _LINUX_SUNRPC_ADDR_H
|
|
|
|
#include <linux/socket.h>
|
|
#include <linux/in.h>
|
|
#include <linux/in6.h>
|
|
#include <net/ipv6.h>
|
|
|
|
size_t rpc_ntop(const struct sockaddr *, char *, const size_t);
|
|
size_t rpc_pton(struct net *, const char *, const size_t,
|
|
struct sockaddr *, const size_t);
|
|
char * rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
|
|
size_t rpc_uaddr2sockaddr(struct net *, const char *, const size_t,
|
|
struct sockaddr *, const size_t);
|
|
|
|
static inline unsigned short rpc_get_port(const struct sockaddr *sap)
|
|
{
|
|
switch (sap->sa_family) {
|
|
case AF_INET:
|
|
return ntohs(((struct sockaddr_in *)sap)->sin_port);
|
|
case AF_INET6:
|
|
return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void rpc_set_port(struct sockaddr *sap,
|
|
const unsigned short port)
|
|
{
|
|
switch (sap->sa_family) {
|
|
case AF_INET:
|
|
((struct sockaddr_in *)sap)->sin_port = htons(port);
|
|
break;
|
|
case AF_INET6:
|
|
((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define IPV6_SCOPE_DELIMITER '%'
|
|
#define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
|
|
|
|
static inline bool __rpc_cmp_addr4(const struct sockaddr *sap1,
|
|
const struct sockaddr *sap2)
|
|
{
|
|
const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1;
|
|
const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2;
|
|
|
|
return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
|
|
}
|
|
|
|
static inline bool __rpc_copy_addr4(struct sockaddr *dst,
|
|
const struct sockaddr *src)
|
|
{
|
|
const struct sockaddr_in *ssin = (struct sockaddr_in *) src;
|
|
struct sockaddr_in *dsin = (struct sockaddr_in *) dst;
|
|
|
|
dsin->sin_family = ssin->sin_family;
|
|
dsin->sin_addr.s_addr = ssin->sin_addr.s_addr;
|
|
return true;
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
|
|
const struct sockaddr *sap2)
|
|
{
|
|
const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1;
|
|
const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2;
|
|
|
|
if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
|
|
return false;
|
|
else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
|
|
return sin1->sin6_scope_id == sin2->sin6_scope_id;
|
|
|
|
return true;
|
|
}
|
|
|
|
static inline bool __rpc_copy_addr6(struct sockaddr *dst,
|
|
const struct sockaddr *src)
|
|
{
|
|
const struct sockaddr_in6 *ssin6 = (const struct sockaddr_in6 *) src;
|
|
struct sockaddr_in6 *dsin6 = (struct sockaddr_in6 *) dst;
|
|
|
|
dsin6->sin6_family = ssin6->sin6_family;
|
|
dsin6->sin6_addr = ssin6->sin6_addr;
|
|
dsin6->sin6_scope_id = ssin6->sin6_scope_id;
|
|
return true;
|
|
}
|
|
#else /* !(IS_ENABLED(CONFIG_IPV6) */
|
|
static inline bool __rpc_cmp_addr6(const struct sockaddr *sap1,
|
|
const struct sockaddr *sap2)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool __rpc_copy_addr6(struct sockaddr *dst,
|
|
const struct sockaddr *src)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* !(IS_ENABLED(CONFIG_IPV6) */
|
|
|
|
/**
|
|
* rpc_cmp_addr - compare the address portion of two sockaddrs.
|
|
* @sap1: first sockaddr
|
|
* @sap2: second sockaddr
|
|
*
|
|
* Just compares the family and address portion. Ignores port, but
|
|
* compares the scope if it's a link-local address.
|
|
*
|
|
* Returns true if the addrs are equal, false if they aren't.
|
|
*/
|
|
static inline bool rpc_cmp_addr(const struct sockaddr *sap1,
|
|
const struct sockaddr *sap2)
|
|
{
|
|
if (sap1->sa_family == sap2->sa_family) {
|
|
switch (sap1->sa_family) {
|
|
case AF_INET:
|
|
return __rpc_cmp_addr4(sap1, sap2);
|
|
case AF_INET6:
|
|
return __rpc_cmp_addr6(sap1, sap2);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* rpc_copy_addr - copy the address portion of one sockaddr to another
|
|
* @dst: destination sockaddr
|
|
* @src: source sockaddr
|
|
*
|
|
* Just copies the address portion and family. Ignores port, scope, etc.
|
|
* Caller is responsible for making certain that dst is large enough to hold
|
|
* the address in src. Returns true if address family is supported. Returns
|
|
* false otherwise.
|
|
*/
|
|
static inline bool rpc_copy_addr(struct sockaddr *dst,
|
|
const struct sockaddr *src)
|
|
{
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
return __rpc_copy_addr4(dst, src);
|
|
case AF_INET6:
|
|
return __rpc_copy_addr6(dst, src);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* rpc_get_scope_id - return scopeid for a given sockaddr
|
|
* @sa: sockaddr to get scopeid from
|
|
*
|
|
* Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if
|
|
* not an AF_INET6 address.
|
|
*/
|
|
static inline u32 rpc_get_scope_id(const struct sockaddr *sa)
|
|
{
|
|
if (sa->sa_family != AF_INET6)
|
|
return 0;
|
|
|
|
return ((struct sockaddr_in6 *) sa)->sin6_scope_id;
|
|
}
|
|
|
|
#endif /* _LINUX_SUNRPC_ADDR_H */
|