diff options
Diffstat (limited to 'lib/icmpv6.h')
-rw-r--r-- | lib/icmpv6.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/lib/icmpv6.h b/lib/icmpv6.h index bf91e27..44b9b73 100644 --- a/lib/icmpv6.h +++ b/lib/icmpv6.h @@ -1,9 +1,90 @@ #pragma once +#include <stdbool.h> + +#include <osmocom/core/msgb.h> +#include <osmocom/core/endian.h> + #include "../gtp/gtp.h" #include "../gtp/pdp.h" +#define ICMPv6_OPT_TYPE_PREFIX_INFO 0x03 + +#define foreach_icmpv6_opt(icmpv6_pkt, icmpv6_len, opt_hdr) \ + for (opt_hdr = (struct icmpv6_opt_hdr *)(icmpv6_pkt)->options; \ + (uint8_t*)(opt_hdr) + sizeof(struct icmpv6_opt_hdr) <= (((uint8_t*)(icmpv6_pkt)) + (icmpv6_len)); \ + opt_hdr = (struct icmpv6_opt_hdr*)((uint8_t*)(opt_hdr) + (opt_hdr)->len) \ + ) + +struct icmpv6_hdr { + uint8_t type; + uint8_t code; + uint16_t csum; +} __attribute__ ((packed)); + +/* RFC4861 Section 4.1 */ +struct icmpv6_rsol_hdr { + struct icmpv6_hdr hdr; + uint32_t reserved; + uint8_t options[0]; +} __attribute__ ((packed)); + +/* RFC4861 Section 4.2 */ +struct icmpv6_radv_hdr { + struct icmpv6_hdr hdr; + uint8_t cur_ho_limit; +#if OSMO_IS_LITTLE_ENDIAN + uint8_t res:6, + m:1, + o:1; +#else + uint8_t m:1, + o:1, + res:6; +#endif + uint16_t router_lifetime; + uint32_t reachable_time; + uint32_t retrans_timer; + uint8_t options[0]; +} __attribute__ ((packed)); + + +/* RFC4861 Section 4.6 */ +struct icmpv6_opt_hdr { + uint8_t type; + /* length in units of 8 octets, including type+len! */ + uint8_t len; + uint8_t data[0]; +} __attribute__ ((packed)); + +/* RFC4861 Section 4.6.2 */ +struct icmpv6_opt_prefix { + struct icmpv6_opt_hdr hdr; + uint8_t prefix_len; +#if OSMO_IS_LITTLE_ENDIAN + uint8_t res:6, + a:1, + l:1; +#else + uint8_t l:1, + a:1, + res:6; +#endif + uint32_t valid_lifetime; + uint32_t preferred_lifetime; + uint32_t res2; + uint8_t prefix[16]; +} __attribute__ ((packed)); + +struct msgb *icmpv6_construct_rs(const struct in6_addr *saddr); + int handle_router_mcast(struct gsn_t *gsn, struct pdp_t *pdp, const struct in6_addr *pdp_prefix, const struct in6_addr *own_ll_addr, const uint8_t *pack, unsigned len); + +struct icmpv6_radv_hdr *icmpv6_validate_router_adv(const uint8_t *pack, unsigned len); + + +/* RFC3307 link-local scope multicast address */ +extern const struct in6_addr all_router_mcast_addr; |