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Diffstat (limited to 'nhrp/nhrp_packet.h')
| -rw-r--r-- | nhrp/nhrp_packet.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/nhrp/nhrp_packet.h b/nhrp/nhrp_packet.h new file mode 100644 index 0000000..3f435c8 --- /dev/null +++ b/nhrp/nhrp_packet.h @@ -0,0 +1,128 @@ +/* nhrp_packet.h - In-memory NHRP packet definitions + * + * Copyright (C) 2007-2009 Timo Teräs <timo.teras@iki.fi> + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 or later as + * published by the Free Software Foundation. + * + * See http://www.gnu.org/ for details. + */ + +#ifndef NHRP_PACKET_H +#define NHRP_PACKET_H + +#include "libev.h" +#include "list.h" +#include "nhrp_protocol.h" +#include "nhrp_address.h" + +#define NHRP_MAX_EXTENSIONS 10 + +#define NHRP_PACKET_DEFAULT_HOP_COUNT 16 + +struct nhrp_interface; + +struct nhrp_buffer { + uint32_t length; + uint8_t data[NHRP_EMPTY_ARRAY]; +}; + +struct nhrp_cie { + struct list_head cie_list_entry; + struct nhrp_cie_header hdr; + struct nhrp_address nbma_address; + struct nhrp_address protocol_address; +}; + +#define NHRP_PAYLOAD_TYPE_ANY -1 +#define NHRP_PAYLOAD_TYPE_NONE 0 +#define NHRP_PAYLOAD_TYPE_RAW 1 +#define NHRP_PAYLOAD_TYPE_CIE_LIST 2 + +struct nhrp_payload { + uint16_t extension_type; + uint16_t payload_type; + union { + struct nhrp_buffer *raw; + struct list_head cie_list; + } u; +}; + +struct nhrp_packet { + int ref; + + struct nhrp_packet_header hdr; + struct nhrp_address src_nbma_address; + struct nhrp_address src_protocol_address; + struct nhrp_address dst_protocol_address; + + int num_extensions; + struct nhrp_payload extension_by_order[NHRP_MAX_EXTENSIONS]; + struct nhrp_payload * extension_by_type[NHRP_MAX_EXTENSIONS]; + + struct list_head request_list_entry; + struct ev_timer timeout; + void (*handler)(void *ctx, struct nhrp_packet *packet); + void * handler_ctx; + int retry; + + uint8_t * req_pdu; + size_t req_pdulen; + + struct nhrp_interface * src_iface; + struct nhrp_address src_linklayer_address; + struct nhrp_interface * dst_iface; + struct nhrp_peer * dst_peer; +}; + +#define NHRP_EXTENSION_FLAG_NOCREATE 0x00010000 + +int nhrp_rate_limit_clear(struct nhrp_address *addr, int prefix_len); + +struct nhrp_buffer *nhrp_buffer_alloc(uint32_t size); +struct nhrp_buffer *nhrp_buffer_copy(struct nhrp_buffer *buffer); +int nhrp_buffer_cmp(struct nhrp_buffer *a, struct nhrp_buffer *b); +void nhrp_buffer_free(struct nhrp_buffer *buffer); + +struct nhrp_cie *nhrp_cie_alloc(void); +void nhrp_cie_free(struct nhrp_cie *cie); +void nhrp_cie_reset(struct nhrp_cie *cie); + +void nhrp_payload_set_type(struct nhrp_payload *payload, int type); +void nhrp_payload_set_raw(struct nhrp_payload *payload, struct nhrp_buffer *buf); +void nhrp_payload_add_cie(struct nhrp_payload *payload, struct nhrp_cie *cie); +struct nhrp_cie *nhrp_payload_get_cie(struct nhrp_payload *payload, int index); +void nhrp_payload_free(struct nhrp_payload *payload); + +struct nhrp_packet *nhrp_packet_alloc(void); +struct nhrp_packet *nhrp_packet_get(struct nhrp_packet *packet); +void nhrp_packet_put(struct nhrp_packet *packet); + +struct nhrp_payload *nhrp_packet_payload(struct nhrp_packet *packet, int payload_type); +struct nhrp_payload *nhrp_packet_extension(struct nhrp_packet *packet, + uint32_t extension, int payload_type); +int nhrp_packet_receive(uint8_t *pdu, size_t pdulen, + struct nhrp_interface *iface, + struct nhrp_address *from); +int nhrp_packet_route(struct nhrp_packet *packet); +int nhrp_packet_reroute(struct nhrp_packet *packet, struct nhrp_peer *dst_peer); +int nhrp_packet_marshall_and_send(struct nhrp_packet *packet); +int nhrp_packet_route_and_send(struct nhrp_packet *packet); +int nhrp_packet_send(struct nhrp_packet *packet); +int nhrp_packet_send_request(struct nhrp_packet *packet, + void (*handler)(void *ctx, struct nhrp_packet *packet), + void *ctx); +int nhrp_packet_send_error(struct nhrp_packet *error_packet, + uint16_t indication_code, uint16_t offset); +int nhrp_packet_send_traffic(struct nhrp_interface *iface, + struct nhrp_address *nbma_src, + struct nhrp_address *protocol_src, + struct nhrp_address *protocol_dst, + int protocol_type, uint8_t *pdu, size_t pdulen); + +void nhrp_packet_hook_request(int request, + int (*handler)(struct nhrp_packet *packet)); + +#endif |