tests: virtio-9p: add version operation test
[qemu.git] / slirp / ip6.h
1 /*
2 * Copyright (c) 2013
3 * Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
4 */
5
6 #ifndef SLIRP_IP6_H
7 #define SLIRP_IP6_H
8
9 #include "net/eth.h"
10
11 #define ALLNODES_MULTICAST { .s6_addr = \
12 { 0xff, 0x02, 0x00, 0x00,\
13 0x00, 0x00, 0x00, 0x00,\
14 0x00, 0x00, 0x00, 0x00,\
15 0x00, 0x00, 0x00, 0x01 } }
16
17 #define SOLICITED_NODE_PREFIX { .s6_addr = \
18 { 0xff, 0x02, 0x00, 0x00,\
19 0x00, 0x00, 0x00, 0x00,\
20 0x00, 0x00, 0x00, 0x01,\
21 0xff, 0x00, 0x00, 0x00 } }
22
23 #define LINKLOCAL_ADDR { .s6_addr = \
24 { 0xfe, 0x80, 0x00, 0x00,\
25 0x00, 0x00, 0x00, 0x00,\
26 0x00, 0x00, 0x00, 0x00,\
27 0x00, 0x00, 0x00, 0x02 } }
28
29 #define ZERO_ADDR { .s6_addr = \
30 { 0x00, 0x00, 0x00, 0x00,\
31 0x00, 0x00, 0x00, 0x00,\
32 0x00, 0x00, 0x00, 0x00,\
33 0x00, 0x00, 0x00, 0x00 } }
34
35 static inline bool in6_equal(const struct in6_addr *a, const struct in6_addr *b)
36 {
37 return memcmp(a, b, sizeof(*a)) == 0;
38 }
39
40 static inline bool in6_equal_net(const struct in6_addr *a,
41 const struct in6_addr *b,
42 int prefix_len)
43 {
44 if (memcmp(a, b, prefix_len / 8) != 0) {
45 return 0;
46 }
47
48 if (prefix_len % 8 == 0) {
49 return 1;
50 }
51
52 return a->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8))
53 == b->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8));
54 }
55
56 static inline bool in6_equal_mach(const struct in6_addr *a,
57 const struct in6_addr *b,
58 int prefix_len)
59 {
60 if (memcmp(&(a->s6_addr[(prefix_len + 7) / 8]),
61 &(b->s6_addr[(prefix_len + 7) / 8]),
62 16 - (prefix_len + 7) / 8) != 0) {
63 return 0;
64 }
65
66 if (prefix_len % 8 == 0) {
67 return 1;
68 }
69
70 return (a->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1))
71 == (b->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1));
72 }
73
74
75 #define in6_equal_router(a)\
76 ((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len)\
77 && in6_equal_mach(a, &slirp->vhost_addr6, slirp->vprefix_len))\
78 || (in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64)\
79 && in6_equal_mach(a, &slirp->vhost_addr6, 64)))
80
81 #define in6_equal_dns(a)\
82 ((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len)\
83 && in6_equal_mach(a, &slirp->vnameserver_addr6, slirp->vprefix_len))\
84 || (in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64)\
85 && in6_equal_mach(a, &slirp->vnameserver_addr6, 64)))
86
87 #define in6_equal_host(a)\
88 (in6_equal_router(a) || in6_equal_dns(a))
89
90 #define in6_solicitednode_multicast(a)\
91 (in6_equal_net(a, &(struct in6_addr)SOLICITED_NODE_PREFIX, 104))
92
93 #define in6_zero(a)\
94 (in6_equal(a, &(struct in6_addr)ZERO_ADDR))
95
96 /* Compute emulated host MAC address from its ipv6 address */
97 static inline void in6_compute_ethaddr(struct in6_addr ip,
98 uint8_t eth[ETH_ALEN])
99 {
100 eth[0] = 0x52;
101 eth[1] = 0x56;
102 memcpy(&eth[2], &ip.s6_addr[16 - (ETH_ALEN - 2)], ETH_ALEN - 2);
103 }
104
105 /*
106 * Definitions for internet protocol version 6.
107 * Per RFC 2460, December 1998.
108 */
109 #define IP6VERSION 6
110 #define IP6_HOP_LIMIT 255
111
112 /*
113 * Structure of an internet header, naked of options.
114 */
115 struct ip6 {
116 #ifdef HOST_WORDS_BIGENDIAN
117 uint32_t
118 ip_v:4, /* version */
119 ip_tc_hi:4, /* traffic class */
120 ip_tc_lo:4,
121 ip_fl_hi:4, /* flow label */
122 ip_fl_lo:16;
123 #else
124 uint32_t
125 ip_tc_hi:4,
126 ip_v:4,
127 ip_fl_hi:4,
128 ip_tc_lo:4,
129 ip_fl_lo:16;
130 #endif
131 uint16_t ip_pl; /* payload length */
132 uint8_t ip_nh; /* next header */
133 uint8_t ip_hl; /* hop limit */
134 struct in6_addr ip_src, ip_dst; /* source and dest address */
135 } QEMU_PACKED;
136
137 /*
138 * IPv6 pseudo-header used by upper-layer protocols
139 */
140 struct ip6_pseudohdr {
141 struct in6_addr ih_src; /* source internet address */
142 struct in6_addr ih_dst; /* destination internet address */
143 uint32_t ih_pl; /* upper-layer packet length */
144 uint16_t ih_zero_hi; /* zero */
145 uint8_t ih_zero_lo; /* zero */
146 uint8_t ih_nh; /* next header */
147 } QEMU_PACKED;
148
149
150 #endif