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7#ifndef _LINUX_SUNRPC_ADDR_H
8#define _LINUX_SUNRPC_ADDR_H
9
10#include <linux/socket.h>
11#include <linux/in.h>
12#include <linux/in6.h>
13#include <net/ipv6.h>
14
15size_t rpc_ntop(const struct sockaddr *, char *, const size_t);
16size_t rpc_pton(struct net *, const char *, const size_t,
17 struct sockaddr *, const size_t);
18char * rpc_sockaddr2uaddr(const struct sockaddr *, gfp_t);
19size_t rpc_uaddr2sockaddr(struct net *, const char *, const size_t,
20 struct sockaddr *, const size_t);
21
22static inline unsigned short rpc_get_port(const struct sockaddr *sap)
23{
24 switch (sap->sa_family) {
25 case AF_INET:
26 return ntohs(((struct sockaddr_in *)sap)->sin_port);
27 case AF_INET6:
28 return ntohs(((struct sockaddr_in6 *)sap)->sin6_port);
29 }
30 return 0;
31}
32
33static inline void rpc_set_port(struct sockaddr *sap,
34 const unsigned short port)
35{
36 switch (sap->sa_family) {
37 case AF_INET:
38 ((struct sockaddr_in *)sap)->sin_port = htons(port);
39 break;
40 case AF_INET6:
41 ((struct sockaddr_in6 *)sap)->sin6_port = htons(port);
42 break;
43 }
44}
45
46#define IPV6_SCOPE_DELIMITER '%'
47#define IPV6_SCOPE_ID_LEN sizeof("%nnnnnnnnnn")
48
49static inline bool rpc_cmp_addr4(const struct sockaddr *sap1,
50 const struct sockaddr *sap2)
51{
52 const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sap1;
53 const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sap2;
54
55 return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
56}
57
58static inline bool __rpc_copy_addr4(struct sockaddr *dst,
59 const struct sockaddr *src)
60{
61 const struct sockaddr_in *ssin = (struct sockaddr_in *) src;
62 struct sockaddr_in *dsin = (struct sockaddr_in *) dst;
63
64 dsin->sin_family = ssin->sin_family;
65 dsin->sin_addr.s_addr = ssin->sin_addr.s_addr;
66 return true;
67}
68
69#if IS_ENABLED(CONFIG_IPV6)
70static inline bool rpc_cmp_addr6(const struct sockaddr *sap1,
71 const struct sockaddr *sap2)
72{
73 const struct sockaddr_in6 *sin1 = (const struct sockaddr_in6 *)sap1;
74 const struct sockaddr_in6 *sin2 = (const struct sockaddr_in6 *)sap2;
75
76 if (!ipv6_addr_equal(&sin1->sin6_addr, &sin2->sin6_addr))
77 return false;
78 else if (ipv6_addr_type(&sin1->sin6_addr) & IPV6_ADDR_LINKLOCAL)
79 return sin1->sin6_scope_id == sin2->sin6_scope_id;
80
81 return true;
82}
83
84static inline bool __rpc_copy_addr6(struct sockaddr *dst,
85 const struct sockaddr *src)
86{
87 const struct sockaddr_in6 *ssin6 = (const struct sockaddr_in6 *) src;
88 struct sockaddr_in6 *dsin6 = (struct sockaddr_in6 *) dst;
89
90 dsin6->sin6_family = ssin6->sin6_family;
91 dsin6->sin6_addr = ssin6->sin6_addr;
92 dsin6->sin6_scope_id = ssin6->sin6_scope_id;
93 return true;
94}
95#else
96static inline bool rpc_cmp_addr6(const struct sockaddr *sap1,
97 const struct sockaddr *sap2)
98{
99 return false;
100}
101
102static inline bool __rpc_copy_addr6(struct sockaddr *dst,
103 const struct sockaddr *src)
104{
105 return false;
106}
107#endif
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119static inline bool rpc_cmp_addr(const struct sockaddr *sap1,
120 const struct sockaddr *sap2)
121{
122 if (sap1->sa_family == sap2->sa_family) {
123 switch (sap1->sa_family) {
124 case AF_INET:
125 return rpc_cmp_addr4(sap1, sap2);
126 case AF_INET6:
127 return rpc_cmp_addr6(sap1, sap2);
128 }
129 }
130 return false;
131}
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138static inline bool rpc_cmp_addr_port(const struct sockaddr *sap1,
139 const struct sockaddr *sap2)
140{
141 if (!rpc_cmp_addr(sap1, sap2))
142 return false;
143 return rpc_get_port(sap1) == rpc_get_port(sap2);
144}
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156static inline bool rpc_copy_addr(struct sockaddr *dst,
157 const struct sockaddr *src)
158{
159 switch (src->sa_family) {
160 case AF_INET:
161 return __rpc_copy_addr4(dst, src);
162 case AF_INET6:
163 return __rpc_copy_addr6(dst, src);
164 }
165 return false;
166}
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175static inline u32 rpc_get_scope_id(const struct sockaddr *sa)
176{
177 if (sa->sa_family != AF_INET6)
178 return 0;
179
180 return ((struct sockaddr_in6 *) sa)->sin6_scope_id;
181}
182
183#endif
184