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/* 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
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