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More debugging output fixes and bug fixes for overlay operation.

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Added proper check to suppress frames claiming to come from
ourselves ( necessary for squelching multi-hop broadcasts, although
we need an extra step there of having transaction ids on broadcast
frames so that we can flood smartly).
This commit is contained in:
gardners 2012-01-10 20:27:36 +10:30
parent cb174a71f6
commit 2a3721506b
4 changed files with 27 additions and 5 deletions
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6
overlay.c
View File

@ -231,6 +231,12 @@ int overlay_frame_process(int interface,overlay_frame *f)
if (debug&DEBUG_OVERLAYFRAMES) WHY("Source address could not be resolved, so dropping frame.");
return -1;
}
if (overlay_address_is_local(f->source))
{
if (debug&DEBUG_OVERLAYROUTING)
WHY("Dropping frame claiming to come from myself.");
return -1;
}
if (f->destination_address_status==OA_RESOLVED) {
for(i=0;i<SID_SIZE;i++) if (f->destination[i]!=0xff) break;

5
overlay_buffer.c
View File

@ -74,7 +74,10 @@ int ob_unlimitsize(overlay_buffer *b)
int ob_makespace(overlay_buffer *b,int bytes)
{
if (b->sizeLimit!=-1) {
if (b->length+bytes>b->sizeLimit) return WHY("Asked to make space beyond size limit");
if (b->length+bytes>b->sizeLimit) {
if (debug&DEBUG_PACKETFORMATS) WHY("Asked to make space beyond size limit");
return -1;
}
}
if (b->length+bytes>=b->allocSize)
{

4
overlay_payload.c
View File

@ -140,7 +140,9 @@ int overlay_frame_package_fmt1(overlay_frame *p,overlay_buffer *b)
if (ob_makespace(b,2+headers->length+p->payload->length)) {
/* Not enough space free in output buffer */
ob_free(headers);
return WHY("Could not make enough space free in output buffer");
if (debug&DEBUG_PACKETFORMATS)
WHY("Could not make enough space free in output buffer");
return -1;
}
/* Package up headers and payload */

17
overlay_route.c
View File

@ -972,6 +972,18 @@ int overlay_route_saw_selfannounce_ack(int interface,overlay_frame *f,long long
int overlay_route_record_link(long long now,unsigned char *to,unsigned char *via,unsigned int timestamp,int score,int gateways_en_route)
{
int i,slot=-1;
/* Don't record routes to ourselves */
if (overlay_address_is_local(to)) return 0;
for(i=0;i<SID_SIZE;i++) if (to[i]!=via[i]) break;
if (i==SID_SIZE) {
/* TO and VIA are the same, which makes no sense.
So ignore */
return 0;
}
fprintf(stderr,"route_record_link(0x%llx,%s*,",
now,overlay_render_sid_prefix(to,7));
fprintf(stderr,"%s*,0x%08x,%d)\n",
@ -980,7 +992,6 @@ int overlay_route_record_link(long long now,unsigned char *to,unsigned char *via
overlay_node *n=overlay_route_find_node(to,1 /* create node if missing */);
if (!n) return WHY("Could not find or create entry for node");
int i,slot=-1;
for(i=0;i<OVERLAY_MAX_OBSERVATIONS;i++)
{
/* Take note of where we can find space for a fresh observation */
@ -1020,8 +1031,8 @@ int overlay_route_record_link(long long now,unsigned char *to,unsigned char *via
overlay_route_recalc_node_metrics(n,now);
overlay_route_dump();
if (1||debug&DEBUG_OVERLAYROUTEMONITOR) overlay_route_dump();
return 0;
}