diff options
Diffstat (limited to 'pimd/pim_msg.h')
| -rw-r--r-- | pimd/pim_msg.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/pimd/pim_msg.h b/pimd/pim_msg.h index ad9b5d9c01..5f50303967 100644 --- a/pimd/pim_msg.h +++ b/pimd/pim_msg.h @@ -23,6 +23,8 @@ #include <netinet/in.h> #include "pim_jp_agg.h" + +#define PIM_HDR_LEN sizeof(struct pim_msg_header) /* Number Description ---------- ------------------ @@ -41,11 +43,20 @@ enum pim_msg_address_family { /* * Network Order pim_msg_hdr + * ========================= + * PIM Header definition as per RFC 5059. N bit introduced to indicate + * do-not-forward option in PIM Boot strap Message. + * 0 1 2 3 + * 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 + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + * |PIM Ver| Type |N| Reserved | Checksum | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ struct pim_msg_header { uint8_t type : 4; uint8_t ver : 4; - uint8_t reserved; + uint8_t Nbit : 1; /* No Fwd Bit */ + uint8_t reserved : 7; uint16_t checksum; } __attribute__((packed)); @@ -58,7 +69,9 @@ struct pim_encoded_ipv4_unicast { struct pim_encoded_group_ipv4 { uint8_t ne; uint8_t family; - uint8_t reserved; + uint8_t bidir : 1; /* Bidir bit */ + uint8_t reserved : 6; /* Reserved */ + uint8_t sz : 1; /* scope zone bit */ uint8_t mask; struct in_addr addr; } __attribute__((packed)); @@ -88,7 +101,7 @@ struct pim_jp { } __attribute__((packed)); void pim_msg_build_header(uint8_t *pim_msg, size_t pim_msg_size, - uint8_t pim_msg_type); + uint8_t pim_msg_type, bool no_fwd); uint8_t *pim_msg_addr_encode_ipv4_ucast(uint8_t *buf, struct in_addr addr); uint8_t *pim_msg_addr_encode_ipv4_group(uint8_t *buf, struct in_addr addr); |