int ClusterMembership::buildPacket(char *buf, int maxlen)
{
int l = 0;
// Magic number
*(unsigned int *) buf = htonl(MagicNumber);
l += 4;
// Cluster IP
clusteraddr.copyTo(& (buf[l])); l += 4;
// Our IP
localaddr.copyTo(& (buf[l])); l += 4;
bool ismaster = (localaddr == master);
CommandType cmd = CommandStatus;
if (ismaster) {
cmd = CommandMaster;
}
// Command type
*(unsigned int *) & buf[l] = htonl(cmd); l += 4;
// Node weight
*(int *) & buf[l] = htonl(effectiveWeight); l += 4;
// If we're the master, add the number of nodes
// followed by their limits...
if (ismaster) {
calcBoundaries();
int nodenumOffset = l; // Reserve a byte for num nodes
l = l + 1;
int numnodes = 0;
for (IpNodeMap::iterator i=nodes.begin(); i != nodes.end(); i++) {
if (l > (maxlen - 16)) {
throw std::runtime_error("Buffer is in danger of overflow");
}
const IpAddress & ip = (*i).first;
NodeInfo &ni = (*i).second;
if (ni.isup && (ni.upperHashLimit != 0)) {
ip.copyTo(& (buf[l])); l += 4;
*(int *) & buf[l] = htonl(ni.lowerHashLimit); l += 4;
*(int *) & buf[l] = htonl(ni.upperHashLimit); l += 4;
numnodes ++;
}
}
// Add number of nodes.
buf[nodenumOffset] = (char) numnodes;
}
return l;
}
MultiVariableInterp2D::MultiVariableInterp2D(const char* fileName) {
loadPoints(fileName);
calcBoundaries();
}
