/*
Copyright (C) 2010 Srivats P.

This file is part of "Ostinato"

This is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*/

import "protocol.proto";

package OstProto;
// IPv4
message Ip4 {

    enum IpAddrMode {
        e_im_fixed = 0;
        e_im_inc_host = 1;
        e_im_dec_host = 2;
        e_im_random_host = 3;
    }

    optional bool is_override_ver    = 1;
    optional bool is_override_hdrlen = 2;
    optional bool is_override_totlen = 3;
    optional bool is_override_proto  = 30;
    optional bool is_override_cksum  = 4;

    optional uint32    ver_hdrlen = 5 [default = 0x45]; 
    optional uint32    tos = 6;
    optional uint32    totlen = 7;
    optional uint32    id = 8 [default = 1234];
    optional uint32    flags = 9;
    optional uint32    frag_ofs = 10;
    optional uint32    ttl = 11 [default = 127];
    optional uint32    proto = 12;
    optional uint32    cksum = 13;

    // Source IP
    optional fixed32    src_ip = 14;
    optional IpAddrMode    src_ip_mode = 15 [default = e_im_fixed];
    optional uint32        src_ip_count = 16 [default = 16];
    optional fixed32    src_ip_mask = 17 [default = 0xFFFFFF00];
    
    // Destination IP
    optional fixed32    dst_ip = 18;
    optional IpAddrMode    dst_ip_mode = 19 [default = e_im_fixed];
    optional uint32        dst_ip_count = 20 [default = 16];
    optional fixed32    dst_ip_mask = 21 [default = 0xFFFFFF00];

    optional bytes      options = 22;
}

extend Protocol {
    optional Ip4 ip4 = 301;
}