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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.
*/
/*
* igmp_packet.h: igmp packet format
*
* Copyright (c) 2011 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_vnet_igmp_packet_h
#define included_vnet_igmp_packet_h
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#define foreach_igmp_type \
_ (0x11, membership_query) \
_ (0x12, membership_report_v1) \
_ (0x13, dvmrp) \
_ (0x14, pim_v1) \
_ (0x15, cisco_trace) \
_ (0x16, membership_report_v2) \
_ (0x17, leave_group_v2) \
_ (0x1e, traceroute_response) \
_ (0x1f, traceroute_request) \
_ (0x22, membership_report_v3) \
_ (0x30, router_advertisement) \
_ (0x31, router_solicitation) \
_ (0x32, router_termination)
typedef enum
{
#define _(n,f) IGMP_TYPE_##f = n,
foreach_igmp_type
#undef _
} igmp_type_t;
typedef struct
{
igmp_type_t type:8;
u8 code;
u16 checksum;
} igmp_header_t;
typedef struct
{
/* membership_query, version <= 2 reports. */
igmp_header_t header;
/* Multicast destination address. */
ip4_address_t dst;
} igmp_message_t;
#define foreach_igmp_membership_group_v3_type \
_ (1, mode_is_filter_include) \
_ (2, mode_is_filter_exclude) \
_ (3, change_to_filter_include) \
_ (4, change_to_filter_exclude) \
_ (5, allow_new_sources) \
_ (6, block_old_sources)
typedef enum
{
#define _(n,f) IGMP_MEMBERSHIP_GROUP_##f = n,
foreach_igmp_membership_group_v3_type
#undef _
} igmp_membership_group_v3_type_t;
typedef struct
{
igmp_membership_group_v3_type_t type:8;
/* Number of 32 bit words of aux data after source addresses. */
u8 n_aux_u32s;
/* Number of source addresses that follow. */
u16 n_src_addresses;
/* Destination multicast address. */
ip4_address_t dst_address;
ip4_address_t src_addresses[0];
} igmp_membership_group_v3_t;
always_inline igmp_membership_group_v3_t *
igmp_membership_group_v3_next (igmp_membership_group_v3_t * g)
{
return ((void *) g
+ g->n_src_addresses * sizeof (g->src_addresses[0])
+ g->n_aux_u32s * sizeof (u32));
}
typedef struct
{
/* Type 0x22. */
igmp_header_t header;
u16 unused;
/* Number of groups which follow. */
u16 n_groups;
igmp_membership_group_v3_t groups[0];
} igmp_membership_report_v3_t;
/* IP6 flavor of IGMP is called MLD which is embedded in ICMP6. */
typedef struct
{
/* Preceeded by ICMP v6 header. */
u16 max_response_delay_in_milliseconds;
u16 reserved;
ip6_address_t dst;
} mld_header_t;
#endif /* included_vnet_igmp_packet_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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