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106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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Serval Daemon
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Copyright (C) 2012 Serval Project Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef _SERVALD_OVERLAY_PACKET_H
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#define _SERVALD_OVERLAY_PACKET_H
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#include "overlay_address.h"
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#include "serval.h"
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#define FRAME_NOT_SENT -1
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#define FRAME_DONT_SEND -2
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#define MAX_PACKET_DESTINATIONS OVERLAY_MAX_INTERFACES
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struct packet_destination{
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// if we've sent this packet once, what was the envelope sequence number?
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int sent_sequence;
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// track when we last sent this packet. if we don't get an ack, send it again.
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time_ms_t transmit_time;
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// the actual out going stream for this packet
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struct network_destination *destination;
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};
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struct overlay_frame {
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// packet queue pointers
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struct overlay_frame *prev;
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struct overlay_frame *next;
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// when did we insert into the queue?
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time_ms_t enqueued_at;
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// deprecated, all future "types" should just be assigned port numbers
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unsigned int type;
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// encrypted? signed?
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unsigned int modifiers;
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unsigned char ttl;
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// Which QOS queue?
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unsigned char queue;
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// Should we keep trying until acked?
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char resend;
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// callback and context just before packet sending
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void *send_context;
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int (*send_hook)(struct overlay_frame *, int seq, void *context);
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// when should we send it?
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time_ms_t delay_until;
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// where should we send it?
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struct packet_destination destinations[MAX_PACKET_DESTINATIONS];
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int destination_count;
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// how often have we sent it?
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int transmit_count;
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// each payload gets a sequence number that is reused on retransmission
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int32_t mdp_sequence;
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// packet addressing;
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// where did this packet originate?
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struct subscriber *source;
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// where is this packet destined for
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// for broadcast packets, the destination will be null and the broadcast_id will be set if ttl>1
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struct subscriber *destination;
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struct broadcast broadcast_id;
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// where is this packet going next?
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struct subscriber *next_hop;
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// should we force the next packet header to include our full public key?
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int source_full;
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// how did we receive this packet?
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overlay_interface *interface;
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struct sockaddr_in recvaddr;
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// packet envelope header;
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// Was it a unicast frame
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char unicast;
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// what encoding version was used / should be used?
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int packet_version;
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// which interface did the previous hop sent it from?
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int sender_interface;
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// Raw wire format of the payload, probably encrypted or signed.
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struct overlay_buffer *payload;
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};
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int op_free(struct overlay_frame *p);
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struct overlay_frame *op_dup(struct overlay_frame *f);
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#endif
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