mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-19 05:07:56 +00:00
ea9de737a2
Configurable rules file path: mdp.filter_rules_path Add filter rules parsing code, add filtering to outgoing as well as incoming packets New test script: tests/mdp with two test cases Improve test defs: new execute_servald() function Widen MDP port number format from 8 to ten chars to accommodate leading "0x"
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
|
|
Serval DNA MDP overlay frame
|
|
Copyright (C) 2012 Serval Project Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __SERVAL_DNA__OVERLAY_PACKET_H
|
|
#define __SERVAL_DNA__OVERLAY_PACKET_H
|
|
|
|
#include "overlay_address.h"
|
|
#include "serval.h"
|
|
#include "conf.h"
|
|
|
|
#define FRAME_NOT_SENT -1
|
|
#define FRAME_DONT_SEND -2
|
|
|
|
#define MAX_PACKET_DESTINATIONS OVERLAY_MAX_INTERFACES
|
|
|
|
struct packet_destination{
|
|
// if we've sent this packet once, what was the envelope sequence number?
|
|
int sent_sequence;
|
|
// track when we last sent this packet. if we don't get an ack, send it again.
|
|
time_ms_t transmit_time;
|
|
// the actual out going stream for this packet
|
|
struct network_destination *destination;
|
|
};
|
|
|
|
struct overlay_frame {
|
|
// packet queue pointers
|
|
struct overlay_frame *prev;
|
|
struct overlay_frame *next;
|
|
// when did we insert into the queue?
|
|
time_ms_t enqueued_at;
|
|
|
|
// deprecated, all future "types" should just be assigned port numbers
|
|
unsigned int type;
|
|
// encrypted? signed?
|
|
unsigned int modifiers;
|
|
|
|
unsigned char ttl;
|
|
// Which QOS queue?
|
|
unsigned char queue;
|
|
// Should we keep trying until acked?
|
|
char resend;
|
|
|
|
// callback and context just before packet sending
|
|
void *send_context;
|
|
int (*send_hook)(struct overlay_frame *, int seq, void *context);
|
|
|
|
// when should we send it?
|
|
time_ms_t delay_until;
|
|
// where should we send it?
|
|
struct packet_destination destinations[MAX_PACKET_DESTINATIONS];
|
|
int destination_count;
|
|
// how often have we sent it?
|
|
int transmit_count;
|
|
|
|
// each payload gets a sequence number that is reused on retransmission
|
|
int32_t mdp_sequence;
|
|
|
|
// packet addressing;
|
|
// where did this packet originate?
|
|
struct subscriber *source;
|
|
// where is this packet destined for
|
|
// for broadcast packets, the destination will be null and the broadcast_id will be set if ttl>1
|
|
struct subscriber *destination;
|
|
struct broadcast broadcast_id;
|
|
// where is this packet going next?
|
|
struct subscriber *next_hop;
|
|
|
|
// should we force the next packet header to include our full public key?
|
|
int source_full;
|
|
|
|
// how did we receive this packet?
|
|
struct overlay_interface *interface;
|
|
|
|
// packet envelope header;
|
|
// Was it a unicast frame
|
|
char unicast;
|
|
// what encoding version was used / should be used?
|
|
int packet_version;
|
|
// which interface did the previous hop sent it from?
|
|
int sender_interface;
|
|
|
|
// Raw wire format of the payload, probably encrypted or signed.
|
|
struct overlay_buffer *payload;
|
|
};
|
|
|
|
// simple representation for passing mdp packet header details
|
|
struct internal_mdp_header{
|
|
struct subscriber *source;
|
|
mdp_port_t source_port;
|
|
struct subscriber *destination;
|
|
mdp_port_t destination_port;
|
|
uint8_t ttl;
|
|
uint8_t qos;
|
|
uint8_t crypt_flags; // combination of MDP_FLAG_NO_CRYPT & MDP_FLAG_NO_SIGN flags
|
|
struct overlay_interface *receive_interface;
|
|
};
|
|
|
|
|
|
int op_free(struct overlay_frame *p);
|
|
struct overlay_frame *op_dup(struct overlay_frame *f);
|
|
|
|
int reload_mdp_packet_rules(void);
|
|
|
|
#endif //__SERVAL_DNA__OVERLAY_PACKET_H
|