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Date:	Thu, 7 Jun 2007 10:10:44 +0530
From:	"Tej Parkash" <>
Subject: extra layer below inet layer.


i just want to have something like tcp layer sitting below inet layer.
so that i can directly offload everything to NIC
and i want it to be placed dynamically. so depending on the nic i can
offload the feature or can make it normal flow.
i.e. both layer should exist and normal functionality should not break.

this code is in af_inet.c

static struct inet_protosw inetsw_array[] =
               .type =       SOCK_STREAM,
               .protocol =   IPPROTO_TCP,
               .prot =       &tcp_prot,
               .ops =        &inet_stream_ops,
               .capability = -1,
               .no_check =   0,
               .flags =      INET_PROTOSW_PERMANENT |

               .type =       SOCK_DGRAM,
               .protocol =   IPPROTO_UDP,
               .prot =       &udp_prot,
               .ops =        &inet_dgram_ops,
               .capability = -1,
               .no_check =   UDP_CSUM_DEFAULT,
               .flags =      INET_PROTOSW_PERMANENT,

              .type =       SOCK_RAW,
              .protocol =   IPPROTO_IP,        /* wild card */
              .prot =       &raw_prot,
              .ops =        &inet_sockraw_ops,
              .capability = CAP_NET_RAW,
              .no_check =   UDP_CSUM_DEFAULT,
              .flags =      INET_PROTOSW_REUSE,

i was just going through the code i found that if i can regsiter above
kind of registration dynamically i will be able to do that.
i have tried to do that but since normal tcp registered this at boot
up time i am not able to unregister this dynamically

so is it possible to unregister tcp and register my protocol dynamically.

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