In the ICMP message processing code, don't try to map ICMP codes to UNIX
error codes as the caller (IPv4/IPv6) already did that for us (ee_errno).
Signed-off-by: David Howells <dhowells@redhat.com>
                        switch (ee->ee_code) {
                        case ICMP_NET_UNREACH:
                                _net("Rx Received ICMP Network Unreachable");
-                               err = ENETUNREACH;
                                break;
                        case ICMP_HOST_UNREACH:
                                _net("Rx Received ICMP Host Unreachable");
-                               err = EHOSTUNREACH;
                                break;
                        case ICMP_PORT_UNREACH:
                                _net("Rx Received ICMP Port Unreachable");
-                               err = ECONNREFUSED;
-                               break;
-                       case ICMP_FRAG_NEEDED:
-                               _net("Rx Received ICMP Fragmentation Needed (%d)",
-                                    ee->ee_info);
-                               err = 0; /* dealt with elsewhere */
                                break;
                        case ICMP_NET_UNKNOWN:
                                _net("Rx Received ICMP Unknown Network");
-                               err = ENETUNREACH;
                                break;
                        case ICMP_HOST_UNKNOWN:
                                _net("Rx Received ICMP Unknown Host");
-                               err = EHOSTUNREACH;
                                break;
                        default:
                                _net("Rx Received ICMP DestUnreach code=%u",