Re: [I] proxy jump failure in mina sshd 2.13.2 [mina-sshd]

[via GitHub]

lawmin2021 commented on issue #609:
URL: https://github.com/apache/mina-sshd/issues/609#issuecomment-2362246015

   I made the following change to pass my case, hope it work for 
[GH-318](https://github.com/apache/mina-sshd/issues/318) Handle cascaded proxy 
jumps
   
   protected List<HostConfigEntry> parseProxyJumps(HostConfigEntry entry, 
AttributeRepository context)
               throws IOException {
           List<HostConfigEntry> hops;
           try {
               hops = parseProxyJumps(entry.getProxyJump(), context);
               if (GenericUtils.isEmpty(hops)) {
                   return hops;
               }
               // If the last entry itself has proxy jumps, we need to append 
them. Guard against possible proxy jump
               // loops by imposing an upper limit on the total number of jumps.
               for (;;) {
                   HostConfigEntry last = hops.get(hops.size() - 1);
                   try {
                       List<HostConfigEntry> additionalHops = 
parseProxyJumps(last.getProxyJump(), context);
                       if (additionalHops.isEmpty()) {
                           break;
                       } else {
                           boolean isFound = false;
                           for (HostConfigEntry checkAddHop : additionalHops) {
                               for (HostConfigEntry checkHop : hops) {
                                   String fullHopStr = checkHop.toString();
                                   String fullAddHopStr = 
checkAddHop.toString();
                                   if (fullHopStr.equals(fullAddHopStr)) {
                                       isFound = true;
                                       break;
                                   }
                               }
                               if (!isFound) {
                                   hops.add(checkAddHop);
                               }
   
                           }
   
                           if (isFound) {
                               return hops;
                           }
   
                           if (hops.size() > 
CoreModuleProperties.MAX_PROXY_JUMPS.getRequired(this)) {
                               throw new IllegalArgumentException("Too many 
proxy jumps for host " + entry.getHost());
                           }
                       }
                   } catch (IOException | RuntimeException e) {
                       throw new IllegalArgumentException("Problem parsing 
proxyJump from host config " + last.getHost(), e);
                   }
               }
           } catch (IOException | RuntimeException e) {
               throw new IllegalArgumentException("Problem parsing proxyJump 
from host config " + entry.getHost(), e);
           }
           return hops;
       }


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