mirror of
https://gitea.osmocom.org/cellular-infrastructure/osmo-ggsn.git
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1d7e86ae48
There's no need to forward those. Morevoer, they cannot be forwarded when using gtpu kernel mode since it doesn't support reinjecting packets we got from it, so avoid erroring out when trying to inject them later on. Related: OS#6600 Related: OS#6382 Change-Id: Iac8f14083620d86f3872aa951930fbe8f680ff24
110 lines
2.8 KiB
C
110 lines
2.8 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 <osmocom/gtp/gtp.h>
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#include <osmocom/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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/* RFC4861 Section 4.6.4 */
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struct icmpv6_opt_mtu {
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struct icmpv6_opt_hdr hdr;
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uint16_t reserved;
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uint32_t mtu;
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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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uint32_t mtu,
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const uint8_t *pack, unsigned len);
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int handle_solicited_node_mcast(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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extern const uint8_t solicited_node_mcast_addr_prefix[13];
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