diff options
Diffstat (limited to 'slirp/ip6.h')
| -rw-r--r-- | slirp/ip6.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/slirp/ip6.h b/slirp/ip6.h new file mode 100644 index 0000000..731ee72 --- /dev/null +++ b/slirp/ip6.h @@ -0,0 +1,137 @@ +/* + * 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 } } + +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[(prefix_len + 7) / 8]), + &(b->s6_addr[(prefix_len + 7) / 8]), + 16 - (prefix_len + 7) / 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) 0 + +#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)) + +/* 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 |