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add debug output to diagnose interface selection based on

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received address of packet.
This commit is contained in:
gardners 2014-10-31 12:14:37 +10:30
parent a92b3ff29d
commit 6536953703
1 changed files with 26 additions and 1 deletions
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27
overlay_interface.c
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@ -214,18 +214,43 @@ overlay_interface * overlay_interface_get_default(){
overlay_interface * overlay_interface_find(struct in_addr addr, int return_default){ overlay_interface * overlay_interface_find(struct in_addr addr, int return_default){
int i; int i;
overlay_interface *ret = NULL; overlay_interface *ret = NULL;
for (i=0;i<OVERLAY_MAX_INTERFACES;i++){ for (i=0;i<OVERLAY_MAX_INTERFACES;i++){
if (overlay_interfaces[i].state!=INTERFACE_STATE_UP) if (overlay_interfaces[i].state!=INTERFACE_STATE_UP)
continue; continue;
if (overlay_interfaces[i].address.addr.sa_family == AF_INET if (overlay_interfaces[i].address.addr.sa_family == AF_INET
&& (overlay_interfaces[i].netmask.s_addr & addr.s_addr) == (overlay_interfaces[i].netmask.s_addr & overlay_interfaces[i].address.inet.sin_addr.s_addr)){ && (overlay_interfaces[i].netmask.s_addr & addr.s_addr) == (overlay_interfaces[i].netmask.s_addr & overlay_interfaces[i].address.inet.sin_addr.s_addr)){
if (config.debug.overlayinterfaces) {
DEBUGF("Found interface #%d for in_addr=0x%08x, interface mask=0x%08x, interface addr=0x%08x\n",
i,
addr.s_addr,
overlay_interfaces[i].netmask.s_addr,
overlay_interfaces[i].address.inet.sin_addr.s_addr);
}
return &overlay_interfaces[i]; return &overlay_interfaces[i];
} else {
if (config.debug.overlayinterfaces) {
DEBUGF("in_addr=0x%08x is not from interface #%d (interface mask=0x%08x, interface addr=0x%08x)\n",
addr.s_addr,i,
overlay_interfaces[i].netmask.s_addr,
overlay_interfaces[i].address.inet.sin_addr.s_addr);
}
} }
// check if this is a default interface // check if this is a default interface
if (return_default && overlay_interfaces[i].default_route) if (return_default && overlay_interfaces[i].default_route) {
ret=&overlay_interfaces[i]; ret=&overlay_interfaces[i];
if (config.debug.overlayinterfaces) {
DEBUGF("in_addr=0x%08x is being deemed to default-route interface #%d (interface mask=0x%08x, interface addr=0x%08x)\n",
addr.s_addr,i,
overlay_interfaces[i].netmask.s_addr,
overlay_interfaces[i].address.inet.sin_addr.s_addr);
}
}
} }
return ret; return ret;