diff options
Diffstat (limited to 'ospfd/ospf_packet.h')
| -rw-r--r-- | ospfd/ospf_packet.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/ospfd/ospf_packet.h b/ospfd/ospf_packet.h new file mode 100644 index 0000000..2347389 --- /dev/null +++ b/ospfd/ospf_packet.h @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * OSPF Sending and Receiving OSPF Packets. + * Copyright (C) 1999 Toshiaki Takada + */ + +#ifndef _ZEBRA_OSPF_PACKET_H +#define _ZEBRA_OSPF_PACKET_H + +#define OSPF_HEADER_SIZE 24U +#define OSPF_AUTH_SIMPLE_SIZE 8U +#define OSPF_AUTH_MD5_SIZE 16U + +#define OSPF_MAX_PACKET_SIZE 65535U /* includes IP Header size. */ +#define OSPF_HELLO_MIN_SIZE 20U /* not including neighbors */ +#define OSPF_DB_DESC_MIN_SIZE 8U +#define OSPF_LS_REQ_MIN_SIZE 0U +#define OSPF_LS_UPD_MIN_SIZE 4U +#define OSPF_LS_ACK_MIN_SIZE 0U + +#define OSPF_MSG_HELLO 1 /* OSPF Hello Message. */ +#define OSPF_MSG_DB_DESC 2 /* OSPF Database Description Message. */ +#define OSPF_MSG_LS_REQ 3 /* OSPF Link State Request Message. */ +#define OSPF_MSG_LS_UPD 4 /* OSPF Link State Update Message. */ +#define OSPF_MSG_LS_ACK 5 /* OSPF Link State Acknowledgement Message. */ + +#define OSPF_SEND_PACKET_DIRECT 1 +#define OSPF_SEND_PACKET_INDIRECT 2 +#define OSPF_SEND_PACKET_LOOP 3 + +#define OSPF_HELLO_REPLY_DELAY 1 + +/* Return values of functions involved in packet verification, see ospf6d. */ +#define MSG_OK 0 +#define MSG_NG 1 + +struct ospf_packet { + struct ospf_packet *next; + + /* Pointer to data stream. */ + struct stream *s; + + /* IP destination address. */ + struct in_addr dst; + + /* OSPF packet length. */ + uint16_t length; +}; + +/* OSPF packet queue structure. */ +struct ospf_fifo { + unsigned long count; + + struct ospf_packet *head; + struct ospf_packet *tail; +}; + +/* OSPF packet header structure. */ +struct ospf_header { + uint8_t version; /* OSPF Version. */ + uint8_t type; /* Packet Type. */ + uint16_t length; /* Packet Length. */ + struct in_addr router_id; /* Router ID. */ + struct in_addr area_id; /* Area ID. */ + uint16_t checksum; /* Check Sum. */ + uint16_t auth_type; /* Authentication Type. */ + /* Authentication Data. */ + union { + /* Simple Authentication. */ + uint8_t auth_data[OSPF_AUTH_SIMPLE_SIZE]; + /* Cryptographic Authentication. */ + struct { + uint16_t zero; /* Should be 0. */ + uint8_t key_id; /* Key ID. */ + uint8_t auth_data_len; /* Auth Data Length. */ + uint32_t crypt_seqnum; /* Cryptographic Sequence + Number. */ + } crypt; + } u; +}; + +/* OSPF Hello body format. */ +struct ospf_hello { + struct in_addr network_mask; + uint16_t hello_interval; + uint8_t options; + uint8_t priority; + uint32_t dead_interval; + struct in_addr d_router; + struct in_addr bd_router; + struct in_addr neighbors[1]; +}; + +/* OSPF Database Description body format. */ +struct ospf_db_desc { + uint16_t mtu; + uint8_t options; + uint8_t flags; + uint32_t dd_seqnum; +}; + +struct ospf_ls_update { + uint32_t num_lsas; +}; + +/* Macros. */ +/* XXX Perhaps obsolete; function in ospf_packet.c */ +#define OSPF_PACKET_MAX(oi) ospf_packet_max (oi) + +#define OSPF_OUTPUT_PNT(S) ((S)->data + (S)->putp) +#define OSPF_OUTPUT_LENGTH(S) ((S)->endp) + +#define IS_SET_DD_MS(X) ((X) & OSPF_DD_FLAG_MS) +#define IS_SET_DD_M(X) ((X) & OSPF_DD_FLAG_M) +#define IS_SET_DD_I(X) ((X) & OSPF_DD_FLAG_I) +#define IS_SET_DD_ALL(X) ((X) & OSPF_DD_FLAG_ALL) + +/* Prototypes. */ +extern void ospf_packet_free(struct ospf_packet *); +extern struct ospf_fifo *ospf_fifo_new(void); +extern void ospf_fifo_push(struct ospf_fifo *, struct ospf_packet *); +extern struct ospf_packet *ospf_fifo_pop(struct ospf_fifo *); +extern struct ospf_packet *ospf_fifo_head(struct ospf_fifo *); +extern void ospf_fifo_flush(struct ospf_fifo *); +extern void ospf_fifo_free(struct ospf_fifo *); + +extern void ospf_read(struct event *thread); +extern void ospf_hello_send(struct ospf_interface *); +extern void ospf_db_desc_send(struct ospf_neighbor *); +extern void ospf_db_desc_resend(struct ospf_neighbor *); +extern void ospf_ls_req_send(struct ospf_neighbor *); +extern void ospf_ls_upd_send_lsa(struct ospf_neighbor *, struct ospf_lsa *, + int); +extern void ospf_ls_upd_send(struct ospf_neighbor *, struct list *, int, int); +extern void ospf_ls_upd_queue_send(struct ospf_interface *oi, + struct list *update, struct in_addr addr, + int send_lsupd_now); +extern void ospf_ls_ack_send(struct ospf_neighbor *, struct ospf_lsa *); +extern void ospf_ls_ack_send_delayed(struct ospf_interface *); +extern void ospf_ls_retransmit(struct ospf_interface *, struct ospf_lsa *); +extern void ospf_ls_req_event(struct ospf_neighbor *); + +extern void ospf_ls_upd_timer(struct event *thread); +extern void ospf_ls_ack_timer(struct event *thread); +extern void ospf_poll_timer(struct event *thread); +extern void ospf_hello_reply_timer(struct event *thread); + +extern const struct message ospf_packet_type_str[]; +extern const size_t ospf_packet_type_str_max; + +extern void ospf_proactively_arp(struct ospf_neighbor *); + +#endif /* _ZEBRA_OSPF_PACKET_H */ |