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Fix ack's of seq numbers 32<x<64 old

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This commit is contained in:
Jeremy Lakeman 2015-06-22 10:43:54 +09:30
parent e9cdb67b10
commit 2e618547c9
2 changed files with 18 additions and 11 deletions
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8
overlay_queue.c
View File

@ -378,9 +378,7 @@ overlay_stuff_packet(struct outgoing_packet *packet, overlay_txqueue *queue, tim
link_add_destinations(frame);
if (frame->mdp_sequence == -1){
frame->mdp_sequence = mdp_sequence = (mdp_sequence+1)&0xFFFF;
}else if(((mdp_sequence - frame->mdp_sequence)&0xFFFF) >= 64){
if(frame->mdp_sequence != -1 && ((mdp_sequence - frame->mdp_sequence)&0xFFFF) >= 64){
// too late, we've sent too many packets for the next hop to correctly de-duplicate
if (config.debug.overlayframes)
DEBUGF("Retransmition of frame %p mdp seq %d, is too late to be de-duplicated",
@ -476,6 +474,10 @@ overlay_stuff_packet(struct outgoing_packet *packet, overlay_txqueue *queue, tim
}
}
if (frame->mdp_sequence == -1){
frame->mdp_sequence = mdp_sequence = (mdp_sequence+1)&0xFFFF;
}
char will_retransmit=1;
if (frame->packet_version<1 || frame->resend<=0 || packet->seq==-1)
will_retransmit=0;

21
route_link.c
View File

@ -1167,14 +1167,19 @@ int link_received_duplicate(struct subscriber *subscriber, int payload_seq)
int offset = (neighbour->mdp_ack_sequence - 1 - payload_seq)&0xFF;
if (offset < 64){
if (neighbour->mdp_ack_mask & (1<<offset)){
if (neighbour->mdp_ack_mask & (1ull<<offset)){
return 1;
}
neighbour->mdp_ack_mask |= (1<<offset);
neighbour->mdp_ack_mask |= (1ull<<offset);
}else{
int offset = (payload_seq - neighbour->mdp_ack_sequence - 1)&0xFF;
neighbour->mdp_ack_mask = (neighbour->mdp_ack_mask << 1) | 1;
neighbour->mdp_ack_mask = neighbour->mdp_ack_mask << offset;
if (offset>=64){
neighbour->mdp_ack_mask = 0;
DEBUGF("Jump in neighbour mdp seq (%d -> %d)",neighbour->mdp_ack_sequence,payload_seq);
}else{
neighbour->mdp_ack_mask = (neighbour->mdp_ack_mask << 1) | 1;
neighbour->mdp_ack_mask = neighbour->mdp_ack_mask << offset;
}
neighbour->mdp_ack_sequence = payload_seq;
}
return 0;
@ -1183,7 +1188,7 @@ int link_received_duplicate(struct subscriber *subscriber, int payload_seq)
// remote peer has confirmed hearing a recent unicast packet
int link_unicast_ack(struct subscriber *UNUSED(subscriber), struct overlay_interface *UNUSED(interface), struct socket_address *UNUSED(addr))
{
// TODO find / create network destination, keep it alive
// NOOP, the packet arrival has already been tracked
return 0;
}
@ -1255,7 +1260,7 @@ int link_received_packet(struct decode_context *context, int sender_seq, char un
if (config.debug.verbose && config.debug.linkstate)
DEBUGF("LINK STATE; late seq %d from %s on %s",
sender_seq, alloca_tohex_sid_t(context->sender->sid), context->interface->name);
link->ack_mask |= (1<<offset);
link->ack_mask |= (1ull<<offset);
}else{
link->ack_mask = (link->ack_mask << 1) | 1;
while(1){
@ -1269,7 +1274,7 @@ int link_received_packet(struct decode_context *context, int sender_seq, char un
link->ack_mask = link->ack_mask << 1;
link->ack_counter --;
// we may need to nack promptly
// we need to nack promptly
if (neighbour->using_us && link==neighbour->best_link){
neighbour->next_neighbour_update = now + 5;
}
@ -1488,7 +1493,7 @@ int link_receive(struct internal_mdp_header *header, struct overlay_buffer *payl
// did they miss our last ack?
if (neighbour->last_update_seq!=-1){
int seq_delta = (ack_seq - neighbour->last_update_seq)&0xFF;
if (seq_delta <= 32 && (seq_delta==0 || ack_mask&(1<<(seq_delta-1)))){
if (seq_delta <= 32 && (seq_delta==0 || ack_mask&(1ull<<(seq_delta-1)))){
neighbour->last_update_seq = -1;
}else if(seq_delta < 128){
// send another ack soon