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/*
* Copyright (C) 2015, Broadcom Corporation. All Rights Reserved.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Fundamental constants relating to IP Protocol
*
* $Id: bcmip.h 329791 2012-04-26 22:36:58Z $
*/
#ifndef _bcmip_h_
#define _bcmip_h_
#ifndef _TYPEDEFS_H_
#include <typedefs.h>
#endif
#include <packed_section_start.h>
#define IP_VER_OFFSET 0x0
#define IP_VER_MASK 0xf0
#define IP_VER_SHIFT 4
#define IP_VER_4 4
#define IP_VER_6 6
#define IP_VER(ip_body) \
((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)
#define IP_PROT_ICMP 0x1
#define IP_PROT_IGMP 0x2
#define IP_PROT_TCP 0x6
#define IP_PROT_UDP 0x11
#define IP_PROT_ICMP6 0x3a
#define IPV4_VER_HL_OFFSET 0
#define IPV4_TOS_OFFSET 1
#define IPV4_PKTLEN_OFFSET 2
#define IPV4_PKTFLAG_OFFSET 6
#define IPV4_PROT_OFFSET 9
#define IPV4_CHKSUM_OFFSET 10
#define IPV4_SRC_IP_OFFSET 12
#define IPV4_DEST_IP_OFFSET 16
#define IPV4_OPTIONS_OFFSET 20
#define IPV4_MIN_HEADER_LEN 20
#define IPV4_VER_MASK 0xf0
#define IPV4_VER_SHIFT 4
#define IPV4_HLEN_MASK 0x0f
#define IPV4_HLEN(ipv4_body) (4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))
#define IPV4_ADDR_LEN 4
#define IPV4_ADDR_NULL(a) ((((uint8 *)(a))[0] | ((uint8 *)(a))[1] | \
((uint8 *)(a))[2] | ((uint8 *)(a))[3]) == 0)
#define IPV4_ADDR_BCAST(a) ((((uint8 *)(a))[0] & ((uint8 *)(a))[1] & \
((uint8 *)(a))[2] & ((uint8 *)(a))[3]) == 0xff)
#define IPV4_TOS_DSCP_MASK 0xfc
#define IPV4_TOS_DSCP_SHIFT 2
#define IPV4_TOS(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])
#define IPV4_TOS_PREC_MASK 0xe0
#define IPV4_TOS_PREC_SHIFT 5
#define IPV4_TOS_LOWDELAY 0x10
#define IPV4_TOS_THROUGHPUT 0x8
#define IPV4_TOS_RELIABILITY 0x4
#define IPV4_PROT(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])
#define IPV4_FRAG_RESV 0x8000
#define IPV4_FRAG_DONT 0x4000
#define IPV4_FRAG_MORE 0x2000
#define IPV4_FRAG_OFFSET_MASK 0x1fff
#define IPV4_ADDR_STR_LEN 16
BWL_PRE_PACKED_STRUCT struct ipv4_addr {
uint8 addr[IPV4_ADDR_LEN];
} BWL_POST_PACKED_STRUCT;
BWL_PRE_PACKED_STRUCT struct ipv4_hdr {
uint8 version_ihl;
uint8 tos;
uint16 tot_len;
uint16 id;
uint16 frag;
uint8 ttl;
uint8 prot;
uint16 hdr_chksum;
uint8 src_ip[IPV4_ADDR_LEN];
uint8 dst_ip[IPV4_ADDR_LEN];
} BWL_POST_PACKED_STRUCT;
#define IPV6_PAYLOAD_LEN_OFFSET 4
#define IPV6_NEXT_HDR_OFFSET 6
#define IPV6_HOP_LIMIT_OFFSET 7
#define IPV6_SRC_IP_OFFSET 8
#define IPV6_DEST_IP_OFFSET 24
#define IPV6_TRAFFIC_CLASS(ipv6_body) \
(((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) | \
((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4))
#define IPV6_FLOW_LABEL(ipv6_body) \
(((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) | \
(((uint8 *)(ipv6_body))[2] << 8) | \
(((uint8 *)(ipv6_body))[3]))
#define IPV6_PAYLOAD_LEN(ipv6_body) \
((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) | \
((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1])
#define IPV6_NEXT_HDR(ipv6_body) \
(((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET])
#define IPV6_PROT(ipv6_body) IPV6_NEXT_HDR(ipv6_body)
#define IPV6_ADDR_LEN 16
#define IP_TOS46(ip_body) \
(IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \
IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0)
#define IPV6_EXTHDR_HOP 0
#define IPV6_EXTHDR_ROUTING 43
#define IPV6_EXTHDR_FRAGMENT 44
#define IPV6_EXTHDR_AUTH 51
#define IPV6_EXTHDR_NONE 59
#define IPV6_EXTHDR_DEST 60
#define IPV6_EXTHDR(prot) (((prot) == IPV6_EXTHDR_HOP) || \
((prot) == IPV6_EXTHDR_ROUTING) || \
((prot) == IPV6_EXTHDR_FRAGMENT) || \
((prot) == IPV6_EXTHDR_AUTH) || \
((prot) == IPV6_EXTHDR_NONE) || \
((prot) == IPV6_EXTHDR_DEST))
#define IPV6_MIN_HLEN 40
#define IPV6_EXTHDR_LEN(eh) ((((struct ipv6_exthdr *)(eh))->hdrlen + 1) << 3)
BWL_PRE_PACKED_STRUCT struct ipv6_exthdr {
uint8 nexthdr;
uint8 hdrlen;
} BWL_POST_PACKED_STRUCT;
BWL_PRE_PACKED_STRUCT struct ipv6_exthdr_frag {
uint8 nexthdr;
uint8 rsvd;
uint16 frag_off;
uint32 ident;
} BWL_POST_PACKED_STRUCT;
static INLINE int32
ipv6_exthdr_len(uint8 *h, uint8 *proto)
{
uint16 len = 0, hlen;
struct ipv6_exthdr *eh = (struct ipv6_exthdr *)h;
while (IPV6_EXTHDR(eh->nexthdr)) {
if (eh->nexthdr == IPV6_EXTHDR_NONE)
return -1;
else if (eh->nexthdr == IPV6_EXTHDR_FRAGMENT)
hlen = 8;
else if (eh->nexthdr == IPV6_EXTHDR_AUTH)
hlen = (eh->hdrlen + 2) << 2;
else
hlen = IPV6_EXTHDR_LEN(eh);
len += hlen;
eh = (struct ipv6_exthdr *)(h + len);
}
*proto = eh->nexthdr;
return len;
}
#define IPV4_ISMULTI(a) (((a) & 0xf0000000) == 0xe0000000)
#include <packed_section_end.h>
#endif
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