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/*
* Copyright (c) 2013
* Guillaume Subiron, Yann Bordenave, Serigne Modou Wagne.
*/
#ifndef SLIRP_IP6_H
#define SLIRP_IP6_H
#include "net/eth.h"
#define ALLNODES_MULTICAST \
{ \
.s6_addr = { \
0xff, \
0x02, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x01 \
} \
}
#define SOLICITED_NODE_PREFIX \
{ \
.s6_addr = { \
0xff, \
0x02, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x01, \
0xff, \
0x00, \
0x00, \
0x00 \
} \
}
#define LINKLOCAL_ADDR \
{ \
.s6_addr = { \
0xfe, \
0x80, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x02 \
} \
}
#define ZERO_ADDR \
{ \
.s6_addr = { \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00, \
0x00 \
} \
}
static inline bool in6_equal(const struct in6_addr *a, const struct in6_addr *b)
{
return memcmp(a, b, sizeof(*a)) == 0;
}
static inline bool in6_equal_net(const struct in6_addr *a,
const struct in6_addr *b, int prefix_len)
{
if (memcmp(a, b, prefix_len / 8) != 0) {
return 0;
}
if (prefix_len % 8 == 0) {
return 1;
}
return a->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8)) ==
b->s6_addr[prefix_len / 8] >> (8 - (prefix_len % 8));
}
static inline bool in6_equal_mach(const struct in6_addr *a,
const struct in6_addr *b, int prefix_len)
{
if (memcmp(&(a->s6_addr[DIV_ROUND_UP(prefix_len, 8)]),
&(b->s6_addr[DIV_ROUND_UP(prefix_len, 8)]),
16 - DIV_ROUND_UP(prefix_len, 8)) != 0) {
return 0;
}
if (prefix_len % 8 == 0) {
return 1;
}
return (a->s6_addr[prefix_len / 8] &
((1U << (8 - (prefix_len % 8))) - 1)) ==
(b->s6_addr[prefix_len / 8] & ((1U << (8 - (prefix_len % 8))) - 1));
}
#define in6_equal_router(a) \
((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len) && \
in6_equal_mach(a, &slirp->vhost_addr6, slirp->vprefix_len)) || \
(in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64) && \
in6_equal_mach(a, &slirp->vhost_addr6, 64)))
#define in6_equal_dns(a) \
((in6_equal_net(a, &slirp->vprefix_addr6, slirp->vprefix_len) && \
in6_equal_mach(a, &slirp->vnameserver_addr6, slirp->vprefix_len)) || \
(in6_equal_net(a, &(struct in6_addr)LINKLOCAL_ADDR, 64) && \
in6_equal_mach(a, &slirp->vnameserver_addr6, 64)))
#define in6_equal_host(a) (in6_equal_router(a) || in6_equal_dns(a))
#define in6_solicitednode_multicast(a) \
(in6_equal_net(a, &(struct in6_addr)SOLICITED_NODE_PREFIX, 104))
#define in6_zero(a) (in6_equal(a, &(struct in6_addr)ZERO_ADDR))
/* Compute emulated host MAC address from its ipv6 address */
static inline void in6_compute_ethaddr(struct in6_addr ip,
uint8_t eth[ETH_ALEN])
{
eth[0] = 0x52;
eth[1] = 0x56;
memcpy(ð[2], &ip.s6_addr[16 - (ETH_ALEN - 2)], ETH_ALEN - 2);
}
/*
* Definitions for internet protocol version 6.
* Per RFC 2460, December 1998.
*/
#define IP6VERSION 6
#define IP6_HOP_LIMIT 255
/*
* Structure of an internet header, naked of options.
*/
struct ip6 {
#ifdef HOST_WORDS_BIGENDIAN
uint32_t ip_v : 4, /* version */
ip_tc_hi : 4, /* traffic class */
ip_tc_lo : 4, ip_fl_hi : 4, /* flow label */
ip_fl_lo : 16;
#else
uint32_t ip_tc_hi : 4, ip_v : 4, ip_fl_hi : 4, ip_tc_lo : 4, ip_fl_lo : 16;
#endif
uint16_t ip_pl; /* payload length */
uint8_t ip_nh; /* next header */
uint8_t ip_hl; /* hop limit */
struct in6_addr ip_src, ip_dst; /* source and dest address */
} QEMU_PACKED;
/*
* IPv6 pseudo-header used by upper-layer protocols
*/
struct ip6_pseudohdr {
struct in6_addr ih_src; /* source internet address */
struct in6_addr ih_dst; /* destination internet address */
uint32_t ih_pl; /* upper-layer packet length */
uint16_t ih_zero_hi; /* zero */
uint8_t ih_zero_lo; /* zero */
uint8_t ih_nh; /* next header */
} QEMU_PACKED;
#endif
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