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 */