/* mpi-bit.c - MPI bit level fucntions * Copyright (C) 1998, 1999 Free Software Foundation, Inc. * * This file is part of GnuPG. * * GnuPG 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 2 of the License, or * (at your option) any later version. * * GnuPG 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA */ #include "mpi-internal.h" #include "longlong.h" #define A_LIMB_1 ((mpi_limb_t) 1) /**************** * Sometimes we have MSL (most significant limbs) which are 0; * this is for some reasons not good, so this function removes them. */ void mpi_normalize(MPI a) { for (; a->nlimbs && !a->d[a->nlimbs - 1]; a->nlimbs--) ; } /**************** * Return the number of bits in A. */ unsigned mpi_get_nbits(MPI a) { unsigned n; mpi_normalize(a); if (a->nlimbs) { mpi_limb_t alimb = a->d[a->nlimbs - 1]; if (alimb) n = count_leading_zeros(alimb); else n = BITS_PER_MPI_LIMB; n = BITS_PER_MPI_LIMB - n + (a->nlimbs - 1) * BITS_PER_MPI_LIMB; } else n = 0; return n; } EXPORT_SYMBOL_GPL(mpi_get_nbits); armlinux.org.uk/linux-net-next.git/tree/net/wireless/trace.h?id=744676e777207f4992ba4cc728a8a71352963c5b'>treecommitdiff
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authorMatteo Croce <mcroce@redhat.com>2020-02-15 14:20:56 +0100
committerDavid S. Miller <davem@davemloft.net>2020-02-16 19:34:44 -0800
commit744676e777207f4992ba4cc728a8a71352963c5b (patch)
tree6e5ebfb7f6a28103ae554e949fefe2eba5ab8ff9 /net/wireless/trace.h
parent7458bd540fa0a90220b9e8c349d910d9dde9caf8 (diff)
openvswitch: add TTL decrement action
New action to decrement TTL instead of setting it to a fixed value. This action will decrement the TTL and, in case of expired TTL, drop it or execute an action passed via a nested attribute. The default TTL expired action is to drop the packet. Supports both IPv4 and IPv6 via the ttl and hop_limit fields, respectively. Tested with a corresponding change in the userspace: # ovs-dpctl dump-flows in_port(2),eth(),eth_type(0x0800), packets:0, bytes:0, used:never, actions:dec_ttl{ttl<=1 action:(drop)},1 in_port(1),eth(),eth_type(0x0800), packets:0, bytes:0, used:never, actions:dec_ttl{ttl<=1 action:(drop)},2 in_port(1),eth(),eth_type(0x0806), packets:0, bytes:0, used:never, actions:2 in_port(2),eth(),eth_type(0x0806), packets:0, bytes:0, used:never, actions:1 # ping -c1 192.168.0.2 -t 42 IP (tos 0x0, ttl 41, id 61647, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.0.1 > 192.168.0.2: ICMP echo request, id 386, seq 1, length 64 # ping -c1 192.168.0.2 -t 120 IP (tos 0x0, ttl 119, id 62070, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.0.1 > 192.168.0.2: ICMP echo request, id 388, seq 1, length 64 # ping -c1 192.168.0.2 -t 1 # Co-developed-by: Bindiya Kurle <bindiyakurle@gmail.com> Signed-off-by: Bindiya Kurle <bindiyakurle@gmail.com> Signed-off-by: Matteo Croce <mcroce@redhat.com> Acked-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/wireless/trace.h')