projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2e804627 YH |
2 | #ifndef __LINUX_PIM_H |
| 3 | #define __LINUX_PIM_H | |
| 4 | ||
| 556d299f | 5 | #include <linux/skbuff.h> |
| 2e804627 YH |
6 | #include <asm/byteorder.h> |
| 7 | ||
| 8 | /* Message types - V1 */ | |
| f3a7c66b | 9 | #define PIM_V1_VERSION cpu_to_be32(0x10000000) |
| 2e804627 YH |
10 | #define PIM_V1_REGISTER 1 |
| 11 | ||
| 12 | /* Message types - V2 */ | |
| 13 | #define PIM_VERSION 2 | |
| 56245cae NA |
14 | |
| 15 | /* RFC7761, sec 4.9: | |
| 16 | * Type | |
| 17 | * Types for specific PIM messages. PIM Types are: | |
| 18 | * | |
| 19 | * Message Type Destination | |
| 20 | * --------------------------------------------------------------------- | |
| 21 | * 0 = Hello Multicast to ALL-PIM-ROUTERS | |
| 22 | * 1 = Register Unicast to RP | |
| 23 | * 2 = Register-Stop Unicast to source of Register | |
| 24 | * packet | |
| 25 | * 3 = Join/Prune Multicast to ALL-PIM-ROUTERS | |
| 26 | * 4 = Bootstrap Multicast to ALL-PIM-ROUTERS | |
| 27 | * 5 = Assert Multicast to ALL-PIM-ROUTERS | |
| 28 | * 6 = Graft (used in PIM-DM only) Unicast to RPF'(S) | |
| 29 | * 7 = Graft-Ack (used in PIM-DM only) Unicast to source of Graft | |
| 30 | * packet | |
| 31 | * 8 = Candidate-RP-Advertisement Unicast to Domain's BSR | |
| 32 | */ | |
| 33 | enum { | |
| 34 | PIM_TYPE_HELLO, | |
| 35 | PIM_TYPE_REGISTER, | |
| 36 | PIM_TYPE_REGISTER_STOP, | |
| 37 | PIM_TYPE_JOIN_PRUNE, | |
| 38 | PIM_TYPE_BOOTSTRAP, | |
| 39 | PIM_TYPE_ASSERT, | |
| 40 | PIM_TYPE_GRAFT, | |
| 41 | PIM_TYPE_GRAFT_ACK, | |
| 42 | PIM_TYPE_CANDIDATE_RP_ADV | |
| 43 | }; | |
| 2e804627 | 44 | |
| f3a7c66b | 45 | #define PIM_NULL_REGISTER cpu_to_be32(0x40000000) |
| 2e804627 | 46 | |
| 556d299f NA |
47 | /* RFC7761, sec 4.9: |
| 48 | * The PIM header common to all PIM messages is: | |
| 49 | * 0 1 2 3 | |
| 50 | * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
| 51 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 52 | * |PIM Ver| Type | Reserved | Checksum | | |
| 53 | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
| 54 | */ | |
| 55 | struct pimhdr { | |
| 56 | __u8 type; | |
| 57 | __u8 reserved; | |
| 58 | __be16 csum; | |
| 59 | }; | |
| 1973a4ea | 60 | |
| 2e804627 | 61 | /* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */ |
| 556d299f | 62 | struct pimreghdr { |
| 2e804627 YH |
63 | __u8 type; |
| 64 | __u8 reserved; | |
| 65 | __be16 csum; | |
| 66 | __be32 flags; | |
| 67 | }; | |
| 68 | ||
| 556d299f NA |
69 | int pim_rcv_v1(struct sk_buff *skb); |
| 70 | ||
| 71 | static inline bool ipmr_pimsm_enabled(void) | |
| 72 | { | |
| 73 | return IS_BUILTIN(CONFIG_IP_PIMSM_V1) || IS_BUILTIN(CONFIG_IP_PIMSM_V2); | |
| 74 | } | |
| 75 | ||
| 76 | static inline struct pimhdr *pim_hdr(const struct sk_buff *skb) | |
| 77 | { | |
| 78 | return (struct pimhdr *)skb_transport_header(skb); | |
| 79 | } | |
| 80 | ||
| 81 | static inline u8 pim_hdr_version(const struct pimhdr *pimhdr) | |
| 82 | { | |
| 83 | return pimhdr->type >> 4; | |
| 84 | } | |
| 85 | ||
| 86 | static inline u8 pim_hdr_type(const struct pimhdr *pimhdr) | |
| 87 | { | |
| 88 | return pimhdr->type & 0xf; | |
| 89 | } | |
| 20bb6ce9 NA |
90 | |
| 91 | /* check if the address is 224.0.0.13, RFC7761 sec 4.3.1 */ | |
| 92 | static inline bool pim_ipv4_all_pim_routers(__be32 addr) | |
| 93 | { | |
| 94 | return addr == htonl(0xE000000D); | |
| 95 | } | |
| 2e804627 | 96 | #endif |