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in_offload.h revision 1.8.54.1 
      1  1.8.54.1  pgoyette /*	$NetBSD: in_offload.h,v 1.8.54.1 2018/07/28 04:38:10 pgoyette Exp $	*/
      2       1.1      yamt 
      3  1.8.54.1  pgoyette /*
      4       1.4      yamt  * Copyright (c)2005, 2006 YAMAMOTO Takashi,
      5       1.1      yamt  * All rights reserved.
      6       1.1      yamt  *
      7       1.1      yamt  * Redistribution and use in source and binary forms, with or without
      8       1.1      yamt  * modification, are permitted provided that the following conditions
      9       1.1      yamt  * are met:
     10       1.1      yamt  * 1. Redistributions of source code must retain the above copyright
     11       1.1      yamt  *    notice, this list of conditions and the following disclaimer.
     12       1.1      yamt  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1      yamt  *    notice, this list of conditions and the following disclaimer in the
     14       1.1      yamt  *    documentation and/or other materials provided with the distribution.
     15       1.1      yamt  *
     16       1.1      yamt  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17       1.1      yamt  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18       1.1      yamt  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19       1.1      yamt  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20       1.1      yamt  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21       1.1      yamt  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22       1.1      yamt  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23       1.1      yamt  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24       1.1      yamt  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25       1.1      yamt  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26       1.1      yamt  * SUCH DAMAGE.
     27       1.1      yamt  */
     28       1.1      yamt 
     29       1.3      elad #ifndef _NETINET_IN_OFFLOAD_H_
     30       1.2      yamt #define	_NETINET_IN_OFFLOAD_H_
     31       1.2      yamt 
     32       1.1      yamt /*
     33  1.8.54.1  pgoyette  * Subroutines to do software-only equivalent of h/w offloading.
     34       1.1      yamt  */
     35       1.5    dyoung int ip_tso_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
     36       1.4      yamt     struct rtentry *);
     37  1.8.54.1  pgoyette void in_undefer_cksum(struct mbuf *, size_t, int);
     38  1.8.54.1  pgoyette void in_undefer_cksum_tcpudp(struct mbuf *);
     39       1.2      yamt 
     40       1.2      yamt /*
     41  1.8.54.1  pgoyette  * Offloading-related sysctl variables.
     42       1.2      yamt  *
     43  1.8.54.1  pgoyette  * They are here because it violates protocol layering in unusual way.
     44       1.2      yamt  * ie. while they are TCP/UDP sysctls, they are used by IP layer.
     45       1.2      yamt  */
     46       1.2      yamt extern int tcp_do_loopback_cksum; /* do TCP checksum on loopback? */
     47       1.2      yamt extern int udp_do_loopback_cksum; /* do UDP checksum on loopback? */
     48       1.1      yamt 
     49       1.8      yamt #define	IN_LOOPBACK_NEED_CHECKSUM(csum_flags) \
     50       1.8      yamt 	((((csum_flags) & M_CSUM_UDPv4) != 0 && udp_do_loopback_cksum) || \
     51       1.8      yamt 	(((csum_flags) & M_CSUM_TCPv4) != 0 && tcp_do_loopback_cksum) || \
     52       1.8      yamt 	(((csum_flags) & M_CSUM_IPv4) != 0 && ip_do_loopback_cksum))
     53       1.8      yamt 
     54       1.6    dyoung #define	IN_NEED_CHECKSUM(ifp, csum_flags) \
     55       1.6    dyoung 	(__predict_true(((ifp)->if_flags & IFF_LOOPBACK) == 0 || \
     56       1.8      yamt 	IN_LOOPBACK_NEED_CHECKSUM(csum_flags)))
     57       1.6    dyoung 
     58       1.3      elad #endif /* !_NETINET_IN_OFFLOAD_H_ */
     59