craig@BBN-LABS-B.ARPA (08/07/84)
From: Craig Partridge <craig@BBN-LABS-B.ARPA> I just had cause to delve into the htable source again and tripped over several apparent bugs/misfeatures handling gateways. I'd post a fix except that we don't use "routed" and therefore don't care what the "gateways" file looks like. I was just out to fix problem #4, which can be solved simply without fixed the production of the "gateways". I'm posting this on the grounds that someone else may be having problems that these notes explain. 1. htable only recognizes gateways that are connected to net 10. All others are skipped. (See htable.c around line 150 -- comparison with INTERNET). 2. htable suppresses duplicate gateways to the same net. (i.e. there can be only one gateway to each network.) Duplicate gateways are not listed in either "gateways" or "hosts". This is a surprising feature if not a bug. 3. there is a loop to find out which networks a gateway is attached to, which doesn't work properly. The code (c. line 155) for (count = 0, al = al->addr_link; al; al = al->addr_link) { fairly clearly should be for (count = 0, al = addrlist; al ; al = al->addr_link) { the result of the present line is that some nets may be lost. 4. htable only recognizes one name for a gateway, the first one listed. All others are suppressed. (This assumes that the gateways has gotten through test 3). Craig Partridge craig@bbn-unix {ihnp4,wjh12,{and others}}!bbncca!craig