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/*
* Copyright (C) 1999-2012, Broadcom Corporation
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2 (the "GPL"),
* available at http://www.broadcom.com/licenses/GPLv2.php, with the
* following added to such license:
*
* As a special exception, the copyright holders of this software give you
* permission to link this software with independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that
* you also meet, for each linked independent module, the terms and conditions of
* the license of that module. An independent module is a module which is not
* derived from this software. The special exception does not apply to any
* modifications of the software.
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a license
* other than the GPL, without Broadcom's express prior written consent.
*
* Fundamental constants relating to IP Protocol
*
* $Id: bcmip.h 290206 2011-10-17 19:13:51Z $
*/
#ifndef _bcmip_h_
#define _bcmip_h_
#ifndef _TYPEDEFS_H_
#include <typedefs.h>
#endif
/* This marks the start of a packed structure section. */
#include <packed_section_start.h>
/* IPV4 and IPV6 common */
#define IP_VER_OFFSET 0x0 /* offset to version field */
#define IP_VER_MASK 0xf0 /* version mask */
#define IP_VER_SHIFT 4 /* version shift */
#define IP_VER_4 4 /* version number for IPV4 */
#define IP_VER_6 6 /* version number for IPV6 */
#define IP_VER(ip_body) \
((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)
#define IP_PROT_ICMP 0x1 /* ICMP protocol */
#define IP_PROT_IGMP 0x2 /* IGMP protocol */
#define IP_PROT_TCP 0x6 /* TCP protocol */
#define IP_PROT_UDP 0x11 /* UDP protocol type */
#define IP_PROT_ICMP6 0x3a /* ICMPv6 protocol type */
/* IPV4 field offsets */
#define IPV4_VER_HL_OFFSET 0 /* version and ihl byte offset */
#define IPV4_TOS_OFFSET 1 /* type of service offset */
#define IPV4_PKTLEN_OFFSET 2 /* packet length offset */
#define IPV4_PKTFLAG_OFFSET 6 /* more-frag,dont-frag flag offset */
#define IPV4_PROT_OFFSET 9 /* protocol type offset */
#define IPV4_CHKSUM_OFFSET 10 /* IP header checksum offset */
#define IPV4_SRC_IP_OFFSET 12 /* src IP addr offset */
#define IPV4_DEST_IP_OFFSET 16 /* dest IP addr offset */
#define IPV4_OPTIONS_OFFSET 20 /* IP options offset */
/* IPV4 field decodes */
#define IPV4_VER_MASK 0xf0 /* IPV4 version mask */
#define IPV4_VER_SHIFT 4 /* IPV4 version shift */
#define IPV4_HLEN_MASK 0x0f /* IPV4 header length mask */
#define IPV4_HLEN(ipv4_body) (4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))
#define IPV4_ADDR_LEN 4 /* IPV4 address length */
#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 /* DiffServ codepoint mask */
#define IPV4_TOS_DSCP_SHIFT 2 /* DiffServ codepoint shift */
#define IPV4_TOS(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])
#define IPV4_TOS_PREC_MASK 0xe0 /* Historical precedence mask */
#define IPV4_TOS_PREC_SHIFT 5 /* Historical precedence shift */
#define IPV4_TOS_LOWDELAY 0x10 /* Lowest delay requested */
#define IPV4_TOS_THROUGHPUT 0x8 /* Best throughput requested */
#define IPV4_TOS_RELIABILITY 0x4 /* Most reliable delivery requested */
#define IPV4_PROT(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])
#define IPV4_FRAG_RESV 0x8000 /* Reserved */
#define IPV4_FRAG_DONT 0x4000 /* Don't fragment */
#define IPV4_FRAG_MORE 0x2000 /* More fragments */
#define IPV4_FRAG_OFFSET_MASK 0x1fff /* Fragment offset */
#define IPV4_ADDR_STR_LEN 16 /* Max IP address length in string format */
/* IPV4 packet formats */
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; /* Version and Internet Header Length */
uint8 tos; /* Type Of Service */
uint16 tot_len; /* Number of bytes in packet (max 65535) */
uint16 id;
uint16 frag; /* 3 flag bits and fragment offset */
uint8 ttl; /* Time To Live */
uint8 prot; /* Protocol */
uint16 hdr_chksum; /* IP header checksum */
uint8 src_ip[IPV4_ADDR_LEN]; /* Source IP Address */
uint8 dst_ip[IPV4_ADDR_LEN]; /* Destination IP Address */
} BWL_POST_PACKED_STRUCT;
/* IPV6 field offsets */
#define IPV6_PAYLOAD_LEN_OFFSET 4 /* payload length offset */
#define IPV6_NEXT_HDR_OFFSET 6 /* next header/protocol offset */
#define IPV6_HOP_LIMIT_OFFSET 7 /* hop limit offset */
#define IPV6_SRC_IP_OFFSET 8 /* src IP addr offset */
#define IPV6_DEST_IP_OFFSET 24 /* dst IP addr offset */
/* IPV6 field decodes */
#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 /* IPV6 address length */
/* IPV4 TOS or IPV6 Traffic Classifier or 0 */
#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)
/* IPV6 extension headers (options) */
#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;
}
/* This marks the end of a packed structure section. */
#include <packed_section_end.h>
#endif /* _bcmip_h_ */
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