Add ENET device to i.MX6 SOC.
[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 static inline bool in6_equal(const struct in6_addr *a, const struct in6_addr *b)
30 {
31 return memcmp(a, b, sizeof(*a)) == 0;
32 }
33
34 static inline bool in6_equal_net(const struct in6_addr *a,
35 const struct in6_addr *b,
36 int prefix_len)
37 {
38 if (memcmp(a, b, prefix_len / 8) != 0) {
39 return 0;
40 }
41
42 if (prefix_len % 8 == 0) {
43 return 1;
44 }
45
46 return a->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8))
47 == b->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8));
48 }
49
50 static inline bool in6_equal_mach(const struct in6_addr *a,
51 const struct in6_addr *b,
52 int prefix_len)
53 {
54 if (memcmp(&(a->s6_addr[(prefix_len + 7) / 8]),
55 &(b->s6_addr[(prefix_len + 7) / 8]),
56 16 - (prefix_len + 7) / 8) != 0) {
57 return 0;
58 }
59
60 if (prefix_len % 8 == 0) {
61 return 1;
62 }
63
64 return (a->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1))
65 == (b->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1));
66 }
67
68
69 #define in6_equal_router(a)\
70 ((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len)\
71 && in6_equal_mach(a, &slirp->vhost_addr6, slirp->vprefix_len))\
72 || (in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64)\
73 && in6_equal_mach(a, &slirp->vhost_addr6, 64)))
74
75 #define in6_equal_dns(a)\
76 ((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len)\
77 && in6_equal_mach(a, &slirp->vnameserver_addr6, slirp->vprefix_len))\
78 || (in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64)\
79 && in6_equal_mach(a, &slirp->vnameserver_addr6, 64)))
80
81 #define in6_equal_host(a)\
82 (in6_equal_router(a) || in6_equal_dns(a))
83
84 #define in6_solicitednode_multicast(a)\
85 (in6_equal_net(a, &(struct in6_addr)SOLICITED_NODE_PREFIX, 104))
86
87 /* Compute emulated host MAC address from its ipv6 address */
88 static inline void in6_compute_ethaddr(struct in6_addr ip,
89 uint8_t eth[ETH_ALEN])
90 {
91 eth[0] = 0x52;
92 eth[1] = 0x56;
93 memcpy(&eth[2], &ip.s6_addr[16 - (ETH_ALEN - 2)], ETH_ALEN - 2);
94 }
95
96 /*
97 * Definitions for internet protocol version 6.
98 * Per RFC 2460, December 1998.
99 */
100 #define IP6VERSION 6
101 #define IP6_HOP_LIMIT 255
102
103 /*
104 * Structure of an internet header, naked of options.
105 */
106 struct ip6 {
107 #ifdef HOST_WORDS_BIGENDIAN
108 uint32_t
109 ip_v:4, /* version */
110 ip_tc_hi:4, /* traffic class */
111 ip_tc_lo:4,
112 ip_fl_hi:4, /* flow label */
113 ip_fl_lo:16;
114 #else
115 uint32_t
116 ip_tc_hi:4,
117 ip_v:4,
118 ip_fl_hi:4,
119 ip_tc_lo:4,
120 ip_fl_lo:16;
121 #endif
122 uint16_t ip_pl; /* payload length */
123 uint8_t ip_nh; /* next header */
124 uint8_t ip_hl; /* hop limit */
125 struct in6_addr ip_src, ip_dst; /* source and dest address */
126 } QEMU_PACKED;
127
128 /*
129 * IPv6 pseudo-header used by upper-layer protocols
130 */
131 struct ip6_pseudohdr {
132 struct in6_addr ih_src; /* source internet address */
133 struct in6_addr ih_dst; /* destination internet address */
134 uint32_t ih_pl; /* upper-layer packet length */
135 uint16_t ih_zero_hi; /* zero */
136 uint8_t ih_zero_lo; /* zero */
137 uint8_t ih_nh; /* next header */
138 } QEMU_PACKED;
139
140
141 #endif