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2019-05-28snap_input: simplify code using existing functionsZhiyong Yang1-11/+6
Change-Id: Ia0cadebab8b800e34e9574601cdebee5ca90cc6a Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
2018-10-23c11 safe string handling supportDave Barach1-1/+1
Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab Signed-off-by: Dave Barach <dave@barachs.net>
2017-10-24Add extern to *_main global variable declarations in header files.Dave Wallace1-1/+1
- Global variables declared in header files without the use of the 'extern' keword will result in multiple instances of the variable to be created by the compiler -- one for each different source file in which the the header file is included. This results in wasted memory allocated in the BSS segments as well as potentially introducing bugs in the application. Change-Id: I6ef1790b60a0bd9dd3994f8510723decf258b0cc Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
2017-10-04[aarch64] Fixes CLI crashes on dpaa2 platform.Christophe Fontaine1-1/+1
- always use 'va_args' as pointer in all format_* functions - u32 for all 'indent' params as it's declaration was inconsistent Change-Id: Ic5799309a6b104c9b50fec309cba789c8da99e79 Signed-off-by: Christophe Fontaine <christophe.fontaine@enea.com>
2017-03-27Mcast rewrite no memcpyNeale Ranns1-3/+0
use a 32bit mask in the adjacency to AND with the IP address and OR into the rewrite. Change-Id: I80b0f246c18fd74f3e43c5d49e25833412f34665 Signed-off-by: Neale Ranns <nranns@cisco.com>
2016-12-28Reorganize source tree to use single autotools instanceDamjan Marion4-0/+882
Change-Id: I7b51f88292e057c6443b12224486f2d0c9f8ae23 Signed-off-by: Damjan Marion <damarion@cisco.com>
#n205'>205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223
/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * ip/ip6.h: ip6 main include file
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_ip_ip6_inlines_h
#define included_ip_ip6_inlines_h

#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/ip6_hop_by_hop_packet.h>

/* Compute flow hash.  We'll use it to select which Sponge to use for this
   flow.  And other things. */
always_inline u32
ip6_compute_flow_hash (const ip6_header_t * ip,
		       flow_hash_config_t flow_hash_config)
{
  tcp_header_t *tcp;
  u64 a, b, c;
  u64 t1, t2;
  uword is_tcp_udp = 0;
  u8 protocol = ip->protocol;

  if (PREDICT_TRUE
      ((ip->protocol == IP_PROTOCOL_TCP)
       || (ip->protocol == IP_PROTOCOL_UDP)))
    {
      is_tcp_udp = 1;
      tcp = (void *) (ip + 1);
    }
  else if (ip->protocol == IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS)
    {
      ip6_hop_by_hop_header_t *hbh = (ip6_hop_by_hop_header_t *) (ip + 1);
      if ((hbh->protocol == IP_PROTOCOL_TCP) ||
	  (hbh->protocol == IP_PROTOCOL_UDP))
	{
	  is_tcp_udp = 1;
	  tcp = (tcp_header_t *) ((u8 *) hbh + ((hbh->length + 1) << 3));
	}
      protocol = hbh->protocol;
    }

  t1 = (ip->src_address.as_u64[0] ^ ip->src_address.as_u64[1]);
  t1 = (flow_hash_config & IP_FLOW_HASH_SRC_ADDR) ? t1 : 0;

  t2 = (ip->dst_address.as_u64[0] ^ ip->dst_address.as_u64[1]);
  t2 = (flow_hash_config & IP_FLOW_HASH_DST_ADDR) ? t2 : 0;

  a = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t2 : t1;
  b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2;

  t1 = is_tcp_udp ? tcp->src : 0;
  t2 = is_tcp_udp ? tcp->dst : 0;

  t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0;
  t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0;

  if (flow_hash_config & IP_FLOW_HASH_SYMMETRIC)
    {
      if (b < a)
	{
	  c = a;
	  a = b;
	  b = c;
	}
      if (t2 < t1)
	{
	  t2 += t1;
	  t1 = t2 - t1;
	  t2 = t2 - t1;
	}
    }

  b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? protocol : 0;
  c = ((flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? ((t1 << 16) | t2) :
							   ((t2 << 16) | t1));
  t1 = ((u64) ip_flow_hash_router_id << 32);
  t1 |=
    ((flow_hash_config & IP_FLOW_HASH_FL) ? ip6_flow_label_network_order (ip) :
					    0);
  c ^= t1;

  hash_mix64 (a, b, c);
  return (u32) c;
}

/* ip6_locate_header
 *
 * This function is to search for the header specified by the protocol number
 * in find_hdr_type.
 * This is used to locate a specific IPv6 extension header
 * or to find transport layer header.
 *   1. If the find_hdr_type < 0 then it finds and returns the protocol number and
 *   offset stored in *offset of the transport or ESP header in the chain if
 *   found.
 *   2. If a header with find_hdr_type > 0 protocol number is found then the
 *      offset is stored in *offset and protocol number of the header is
 *      returned.
 *   3. If find_hdr_type is not found or packet is malformed or
 *      it is a non-first fragment -1 is returned.
 */
always_inline int
ip6_locate_header (vlib_buffer_t *b, ip6_header_t *ip, int find_hdr_type,
		   u32 *offset)
{
  ip6_ext_hdr_chain_t hdr_chain;
  int res = ip6_ext_header_walk (b, ip, find_hdr_type, &hdr_chain);
  if (res >= 0)
    {
      *offset = hdr_chain.eh[res].offset;
      return hdr_chain.eh[res].protocol;
    }
  return -1;
}


/**
 * Push IPv6 header to buffer
 *
 * @param vm - vlib_main
 * @param b - buffer to write the header to
 * @param src - source IP
 * @param dst - destination IP
 * @param prot - payload proto
 * @param flow_label - flow label
 *
 * @return - pointer to start of IP header
 */
always_inline void *
vlib_buffer_push_ip6_custom (vlib_main_t * vm, vlib_buffer_t * b,
			     ip6_address_t * src, ip6_address_t * dst,
			     int proto, u32 flow_label)
{
  ip6_header_t *ip6h;
  u16 payload_length;

  /* make some room */
  ip6h = vlib_buffer_push_uninit (b, sizeof (ip6_header_t));
  ASSERT (flow_label < 1 << 20);
  ip6h->ip_version_traffic_class_and_flow_label =
    clib_host_to_net_u32 ((0x6 << 28) | flow_label);

  /* calculate ip6 payload length */
  payload_length = vlib_buffer_length_in_chain (vm, b);
  payload_length -= sizeof (*ip6h);

  ip6h->payload_length = clib_host_to_net_u16 (payload_length);

  ip6h->hop_limit = 0xff;
  ip6h->protocol = proto;
  clib_memcpy_fast (ip6h->src_address.as_u8, src->as_u8,
		    sizeof (ip6h->src_address));
  clib_memcpy_fast (ip6h->dst_address.as_u8, dst->as_u8,
		    sizeof (ip6h->src_address));
  vnet_buffer (b)->l3_hdr_offset = (u8 *) ip6h - b->data;
  b->flags |= VNET_BUFFER_F_IS_IP6 | VNET_BUFFER_F_L3_HDR_OFFSET_VALID;

  return ip6h;
}

/**
 * Push IPv6 header to buffer
 *
 * @param vm - vlib_main
 * @param b - buffer to write the header to
 * @param src - source IP
 * @param dst - destination IP
 * @param prot - payload proto
 *
 * @return - pointer to start of IP header
 */
always_inline void *
vlib_buffer_push_ip6 (vlib_main_t * vm, vlib_buffer_t * b,
		      ip6_address_t * src, ip6_address_t * dst, int proto)
{
  return vlib_buffer_push_ip6_custom (vm, b, src, dst, proto,
				      0 /* flow label */ );

}

#endif /* included_ip_ip6_h */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */