99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
#pragma once
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#include <stdbool.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/endian.h>
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#include "../gtp/gtp.h"
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#include "../gtp/pdp.h"
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#define ICMPv6_OPT_TYPE_PREFIX_INFO 0x03
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#define foreach_icmpv6_opt(icmpv6_pkt, icmpv6_len, opt_hdr) \
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for (opt_hdr = (struct icmpv6_opt_hdr *)(icmpv6_pkt)->options; \
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(uint8_t*)(opt_hdr) + sizeof(struct icmpv6_opt_hdr) <= (((uint8_t*)(icmpv6_pkt)) + (icmpv6_len)); \
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opt_hdr = (struct icmpv6_opt_hdr*)((uint8_t*)(opt_hdr) + (opt_hdr)->len) \
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)
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struct icmpv6_hdr {
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uint8_t type;
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uint8_t code;
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uint16_t csum;
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} __attribute__ ((packed));
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struct icmpv6_echo_hdr {
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struct icmpv6_hdr hdr;
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uint16_t ident; /* Identifier */
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uint16_t seq; /* Sequence number */
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uint8_t data[0]; /* Data */
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} __attribute__ ((packed));
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/* RFC4861 Section 4.1 */
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struct icmpv6_rsol_hdr {
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struct icmpv6_hdr hdr;
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uint32_t reserved;
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uint8_t options[0];
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} __attribute__ ((packed));
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/* RFC4861 Section 4.2 */
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struct icmpv6_radv_hdr {
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struct icmpv6_hdr hdr;
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uint8_t cur_ho_limit;
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#if OSMO_IS_LITTLE_ENDIAN
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uint8_t res:6,
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m:1,
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o:1;
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#elif OSMO_IS_BIG_ENDIAN
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/* auto-generated from the little endian part above (libosmocore/contrib/struct_endianness.py) */
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uint8_t o:1, m:1, res:6;
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#endif
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uint16_t router_lifetime;
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uint32_t reachable_time;
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uint32_t retrans_timer;
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uint8_t options[0];
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} __attribute__ ((packed));
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/* RFC4861 Section 4.6 */
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struct icmpv6_opt_hdr {
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uint8_t type;
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/* length in units of 8 octets, including type+len! */
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uint8_t len;
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uint8_t data[0];
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} __attribute__ ((packed));
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/* RFC4861 Section 4.6.2 */
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struct icmpv6_opt_prefix {
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struct icmpv6_opt_hdr hdr;
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uint8_t prefix_len;
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#if OSMO_IS_LITTLE_ENDIAN
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uint8_t res:6,
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a:1,
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l:1;
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#elif OSMO_IS_BIG_ENDIAN
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/* auto-generated from the little endian part above (libosmocore/contrib/struct_endianness.py) */
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uint8_t l:1, a:1, res:6;
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#endif
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uint32_t valid_lifetime;
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uint32_t preferred_lifetime;
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uint32_t res2;
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uint8_t prefix[16];
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} __attribute__ ((packed));
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uint16_t icmpv6_prepend_ip6hdr(struct msgb *msg, const struct in6_addr *saddr,
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const struct in6_addr *daddr);
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struct msgb *icmpv6_construct_rs(const struct in6_addr *saddr);
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int handle_router_mcast(struct gsn_t *gsn, struct pdp_t *pdp,
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const struct in6_addr *pdp_prefix,
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const struct in6_addr *own_ll_addr,
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const uint8_t *pack, unsigned len);
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struct icmpv6_radv_hdr *icmpv6_validate_router_adv(const uint8_t *pack, unsigned len);
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/* RFC3307 link-local scope multicast address */
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extern const struct in6_addr all_router_mcast_addr;
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