src/patches/dhcp-4.2.0-unicast-bootp.patch

   1 diff -up dhcp-4.2.0/server/bootp.c.unicast dhcp-4.2.0/server/bootp.c
   2 --- dhcp-4.2.0/server/bootp.c.unicast   2009-11-20 02:49:03.000000000 +0100
   3 +++ dhcp-4.2.0/server/bootp.c   2010-07-21 13:40:25.000000000 +0200
   4 @@ -58,6 +58,7 @@ void bootp (packet)
   5         char msgbuf [1024];
   6         int ignorep;
   7         int peer_has_leases = 0;
   8 +       int norelay = 0;
   9
  10         if (packet -> raw -> op != BOOTREQUEST)
  11                 return;
  12 @@ -73,7 +74,7 @@ void bootp (packet)
  13                  ? inet_ntoa (packet -> raw -> giaddr)
  14                  : packet -> interface -> name);
  15
  16 -       if (!locate_network (packet)) {
  17 +       if ((norelay = locate_network (packet)) == 0) {
  18                 log_info ("%s: network unknown", msgbuf);
  19                 return;
  20         }
  21 @@ -390,6 +391,13 @@ void bootp (packet)
  22                                               from, &to, &hto);
  23                         goto out;
  24                 }
  25 +       } else if (norelay == 2) {
  26 +               to.sin_addr = raw.ciaddr;
  27 +               to.sin_port = remote_port;
  28 +               if (fallback_interface) {
  29 +                       result = send_packet (fallback_interface, (struct packet *)0, &raw, outgoing.packet_length, from, &to, &hto);
  30 +                       goto out;
  31 +               }
  32
  33         /* If it comes from a client that already knows its address
  34            and is not requesting a broadcast response, and we can
  35 diff -up dhcp-4.2.0/server/dhcp.c.unicast dhcp-4.2.0/server/dhcp.c
  36 --- dhcp-4.2.0/server/dhcp.c.unicast    2010-06-01 19:29:59.000000000 +0200
  37 +++ dhcp-4.2.0/server/dhcp.c    2010-07-21 13:40:25.000000000 +0200
  38 @@ -4185,6 +4185,7 @@ int locate_network (packet)
  39         struct data_string data;
  40         struct subnet *subnet = (struct subnet *)0;
  41         struct option_cache *oc;
  42 +       int norelay = 0;
  43
  44         /* See if there's a Relay Agent Link Selection Option, or a
  45          * Subnet Selection Option.  The Link-Select and Subnet-Select
  46 @@ -4200,12 +4201,24 @@ int locate_network (packet)
  47            from the interface, if there is one.   If not, fail. */
  48         if (!oc && !packet -> raw -> giaddr.s_addr) {
  49                 if (packet -> interface -> shared_network) {
  50 -                       shared_network_reference
  51 -                               (&packet -> shared_network,
  52 -                                packet -> interface -> shared_network, MDL);
  53 -                       return 1;
  54 +                       struct in_addr any_addr;
  55 +                       any_addr.s_addr = INADDR_ANY;
  56 +
  57 +                       if (!packet -> packet_type && memcmp(&packet -> raw -> ciaddr, &any_addr, 4)) {
  58 +                               struct iaddr cip;
  59 +                               memcpy(cip.iabuf, &packet -> raw -> ciaddr, 4);
  60 +                               cip.len = 4;
  61 +                               if (!find_grouped_subnet(&subnet, packet->interface->shared_network, cip, MDL))
  62 +                                       norelay = 2;
  63 +                       }
  64 +
  65 +                       if (!norelay) {
  66 +                               shared_network_reference(&packet -> shared_network, packet -> interface -> shared_network, MDL);
  67 +                               return 1;
  68 +                       }
  69 +               } else {
  70 +                       return 0;
  71                 }
  72 -               return 0;
  73         }
  74
  75         /* If there's an option indicating link connection, and it's valid,
  76 @@ -4228,7 +4241,10 @@ int locate_network (packet)
  77                 data_string_forget (&data, MDL);
  78         } else {
  79                 ia.len = 4;
  80 -               memcpy (ia.iabuf, &packet -> raw -> giaddr, 4);
  81 +               if (norelay)
  82 +                       memcpy (ia.iabuf, &packet->raw->ciaddr, 4);
  83 +               else
  84 +                       memcpy (ia.iabuf, &packet->raw->giaddr, 4);
  85         }
  86
  87         /* If we know the subnet on which the IP address lives, use it. */
  88 @@ -4236,7 +4252,10 @@ int locate_network (packet)
  89                 shared_network_reference (&packet -> shared_network,
  90                                           subnet -> shared_network, MDL);
  91                 subnet_dereference (&subnet, MDL);
  92 -               return 1;
  93 +               if (norelay)
  94 +                       return norelay;
  95 +               else
  96 +                       return 1;
  97         }
  98
  99         /* Otherwise, fail. */