2 * linux/include/linux/sunrpc/addr.h
4 * Various routines for copying and comparing sockaddrs and for
5 * converting them to and from presentation format.
7 #ifndef _LINUX_SUNRPC_ADDR_H
8 #define _LINUX_SUNRPC_ADDR_H
10 #include <linux/socket.h>
12 #include <linux/in6.h>
15 size_t rpc_ntop(const struct sockaddr
*, char *, const size_t);
16 size_t rpc_pton(struct net
*, const char *, const size_t,
17 struct sockaddr
*, const size_t);
18 char * rpc_sockaddr2uaddr(const struct sockaddr
*, gfp_t
);
19 size_t rpc_uaddr2sockaddr(struct net
*, const char *, const size_t,
20 struct sockaddr
*, const size_t);
22 static inline unsigned short rpc_get_port(const struct sockaddr
*sap
)
24 switch (sap
->sa_family
) {
26 return ntohs(((struct sockaddr_in
*)sap
)->sin_port
);
28 return ntohs(((struct sockaddr_in6
*)sap
)->sin6_port
);
33 static inline void rpc_set_port(struct sockaddr
*sap
,
34 const unsigned short port
)
36 switch (sap
->sa_family
) {
38 ((struct sockaddr_in
*)sap
)->sin_port
= htons(port
);
41 ((struct sockaddr_in6
*)sap
)->sin6_port
= htons(port
);
46 #define IPV6_SCOPE_DELIMITER '%'
47 #define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
49 static inline bool __rpc_cmp_addr4(const struct sockaddr
*sap1
,
50 const struct sockaddr
*sap2
)
52 const struct sockaddr_in
*sin1
= (const struct sockaddr_in
*)sap1
;
53 const struct sockaddr_in
*sin2
= (const struct sockaddr_in
*)sap2
;
55 return sin1
->sin_addr
.s_addr
== sin2
->sin_addr
.s_addr
;
58 static inline bool __rpc_copy_addr4(struct sockaddr
*dst
,
59 const struct sockaddr
*src
)
61 const struct sockaddr_in
*ssin
= (struct sockaddr_in
*) src
;
62 struct sockaddr_in
*dsin
= (struct sockaddr_in
*) dst
;
64 dsin
->sin_family
= ssin
->sin_family
;
65 dsin
->sin_addr
.s_addr
= ssin
->sin_addr
.s_addr
;
69 #if IS_ENABLED(CONFIG_IPV6)
70 static inline bool __rpc_cmp_addr6(const struct sockaddr
*sap1
,
71 const struct sockaddr
*sap2
)
73 const struct sockaddr_in6
*sin1
= (const struct sockaddr_in6
*)sap1
;
74 const struct sockaddr_in6
*sin2
= (const struct sockaddr_in6
*)sap2
;
76 if (!ipv6_addr_equal(&sin1
->sin6_addr
, &sin2
->sin6_addr
))
78 else if (ipv6_addr_type(&sin1
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
79 return sin1
->sin6_scope_id
== sin2
->sin6_scope_id
;
84 static inline bool __rpc_copy_addr6(struct sockaddr
*dst
,
85 const struct sockaddr
*src
)
87 const struct sockaddr_in6
*ssin6
= (const struct sockaddr_in6
*) src
;
88 struct sockaddr_in6
*dsin6
= (struct sockaddr_in6
*) dst
;
90 dsin6
->sin6_family
= ssin6
->sin6_family
;
91 dsin6
->sin6_addr
= ssin6
->sin6_addr
;
92 dsin6
->sin6_scope_id
= ssin6
->sin6_scope_id
;
95 #else /* !(IS_ENABLED(CONFIG_IPV6) */
96 static inline bool __rpc_cmp_addr6(const struct sockaddr
*sap1
,
97 const struct sockaddr
*sap2
)
102 static inline bool __rpc_copy_addr6(struct sockaddr
*dst
,
103 const struct sockaddr
*src
)
107 #endif /* !(IS_ENABLED(CONFIG_IPV6) */
110 * rpc_cmp_addr - compare the address portion of two sockaddrs.
111 * @sap1: first sockaddr
112 * @sap2: second sockaddr
114 * Just compares the family and address portion. Ignores port, but
115 * compares the scope if it's a link-local address.
117 * Returns true if the addrs are equal, false if they aren't.
119 static inline bool rpc_cmp_addr(const struct sockaddr
*sap1
,
120 const struct sockaddr
*sap2
)
122 if (sap1
->sa_family
== sap2
->sa_family
) {
123 switch (sap1
->sa_family
) {
125 return __rpc_cmp_addr4(sap1
, sap2
);
127 return __rpc_cmp_addr6(sap1
, sap2
);
134 * rpc_copy_addr - copy the address portion of one sockaddr to another
135 * @dst: destination sockaddr
136 * @src: source sockaddr
138 * Just copies the address portion and family. Ignores port, scope, etc.
139 * Caller is responsible for making certain that dst is large enough to hold
140 * the address in src. Returns true if address family is supported. Returns
143 static inline bool rpc_copy_addr(struct sockaddr
*dst
,
144 const struct sockaddr
*src
)
146 switch (src
->sa_family
) {
148 return __rpc_copy_addr4(dst
, src
);
150 return __rpc_copy_addr6(dst
, src
);
156 * rpc_get_scope_id - return scopeid for a given sockaddr
157 * @sa: sockaddr to get scopeid from
159 * Returns the value of the sin6_scope_id for AF_INET6 addrs, or 0 if
160 * not an AF_INET6 address.
162 static inline u32
rpc_get_scope_id(const struct sockaddr
*sa
)
164 if (sa
->sa_family
!= AF_INET6
)
167 return ((struct sockaddr_in6
*) sa
)->sin6_scope_id
;
170 #endif /* _LINUX_SUNRPC_ADDR_H */
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