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/*
* Copyright (c) 2015 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_pg: IP v4 packet-generator interface
*
* 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.
*/
#include <vnet/ip/ip.h>
#include <vnet/pg/pg.h>
static void
ip6_pg_edit_function (pg_main_t * pg,
pg_stream_t * s,
pg_edit_group_t * g, u32 * packets, u32 n_packets)
{
vlib_main_t *vm = vlib_get_main ();
u32 ip_header_offset = g->start_byte_offset;
while (n_packets >= 2)
{
u32 pi0, pi1;
vlib_buffer_t *p0, *p1;
ip6_header_t *ip0, *ip1;
pi0 = packets[0];
pi1 = packets[1];
p0 = vlib_get_buffer (vm, pi0);
p1 = vlib_get_buffer (vm, pi1);
n_packets -= 2;
packets += 2;
ip0 = (void *) (p0->data + ip_header_offset);
ip1 = (void *) (p1->data + ip_header_offset);
ip0->payload_length =
clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, p0) -
ip_header_offset - sizeof (ip0[0]));
ip1->payload_length =
clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, p1) -
ip_header_offset - sizeof (ip1[0]));
}
while (n_packets >= 1)
{
u32 pi0;
vlib_buffer_t *p0;
ip6_header_t *ip0;
pi0 = packets[0];
p0 = vlib_get_buffer (vm, pi0);
n_packets -= 1;
packets += 1;
ip0 = (void *) (p0->data + ip_header_offset);
ip0->payload_length =
clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, p0) -
ip_header_offset - sizeof (ip0[0]));
}
}
typedef struct
{
pg_edit_t ip_version;
pg_edit_t traffic_class;
pg_edit_t flow_label;
pg_edit_t payload_length;
pg_edit_t protocol;
pg_edit_t hop_limit;
pg_edit_t src_address, dst_address;
} pg_ip6_header_t;
static inline void
pg_ip6_header_init (pg_ip6_header_t * p)
{
/* Initialize fields that are not bit fields in the IP header. */
#define _(f) pg_edit_init (&p->f, ip6_header_t, f);
_(payload_length);
_(hop_limit);
_(protocol);
_(src_address);
_(dst_address);
#undef _
/* Initialize bit fields. */
pg_edit_init_bitfield (&p->ip_version, ip6_header_t,
ip_version_traffic_class_and_flow_label, 28, 4);
pg_edit_init_bitfield (&p->traffic_class, ip6_header_t,
ip_version_traffic_class_and_flow_label, 20, 8);
pg_edit_init_bitfield (&p->flow_label, ip6_header_t,
ip_version_traffic_class_and_flow_label, 0, 20);
}
uword
unformat_pg_ip6_header (unformat_input_t * input, va_list * args)
{
pg_stream_t *s = va_arg (*args, pg_stream_t *);
pg_ip6_header_t *p;
u32 group_index;
p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ip6_header_t),
&group_index);
pg_ip6_header_init (p);
/* Defaults. */
pg_edit_set_fixed (&p->ip_version, 6);
pg_edit_set_fixed (&p->traffic_class, 0);
pg_edit_set_fixed (&p->flow_label, 0);
pg_edit_set_fixed (&p->hop_limit, 64);
p->payload_length.type = PG_EDIT_UNSPECIFIED;
if (!unformat (input, "%U: %U -> %U",
unformat_pg_edit,
unformat_ip_protocol, &p->protocol,
unformat_pg_edit,
unformat_ip6_address, &p->src_address,
unformat_pg_edit, unformat_ip6_address, &p->dst_address))
goto error;
/* Parse options. */
while (1)
{
if (unformat (input, "version %U",
unformat_pg_edit, unformat_pg_number, &p->ip_version))
;
else if (unformat (input, "traffic-class %U",
unformat_pg_edit,
unformat_pg_number, &p->traffic_class))
;
else if (unformat (input, "length %U",
unformat_pg_edit,
unformat_pg_number, &p->payload_length))
;
else if (unformat (input, "hop-limit %U",
unformat_pg_edit, unformat_pg_number, &p->hop_limit))
;
/* Can't parse input: try next protocol level. */
else
break;
}
{
ip_main_t *im = &ip_main;
ip_protocol_t protocol;
ip_protocol_info_t *pi;
pi = 0;
if (p->protocol.type == PG_EDIT_FIXED)
{
protocol = pg_edit_get_value (&p->protocol, PG_EDIT_LO);
pi = ip_get_protocol_info (im, protocol);
}
if (pi && pi->unformat_pg_edit
&& unformat_user (input, pi->unformat_pg_edit, s))
;
else if (!unformat_user (input, unformat_pg_payload, s))
goto error;
if (p->payload_length.type == PG_EDIT_UNSPECIFIED
&& s->min_packet_bytes == s->max_packet_bytes
&& group_index + 1 < vec_len (s->edit_groups))
{
pg_edit_set_fixed (&p->payload_length,
pg_edit_group_n_bytes (s,
group_index) -
sizeof (ip6_header_t));
}
p = pg_get_edit_group (s, group_index);
if (p->payload_length.type == PG_EDIT_UNSPECIFIED)
{
pg_edit_group_t *g = pg_stream_get_group (s, group_index);
g->edit_function = ip6_pg_edit_function;
}
return 1;
}
error:
/* Free up any edits we may have added. */
pg_free_edit_group (s);
return 0;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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