251 lines
8.6 KiB
C
Executable File
251 lines
8.6 KiB
C
Executable File
/*
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* Fundamental constants relating to IP Protocol
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*
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* Copyright (C) 1999-2019, Broadcom.
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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* Notwithstanding the above, under no circumstances may you combine this
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* software in any way with any other Broadcom software provided under a license
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* other than the GPL, without Broadcom's express prior written consent.
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*
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*
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* <<Broadcom-WL-IPTag/Open:>>
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*
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* $Id: bcmip.h 785436 2018-10-18 17:54:25Z $
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*/
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#ifndef _bcmip_h_
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#define _bcmip_h_
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#ifndef _TYPEDEFS_H_
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#include <typedefs.h>
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#endif // endif
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/* This marks the start of a packed structure section. */
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#include <packed_section_start.h>
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/* IPV4 and IPV6 common */
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#define IP_VER_OFFSET 0x0 /* offset to version field */
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#define IP_VER_MASK 0xf0 /* version mask */
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#define IP_VER_SHIFT 4 /* version shift */
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#define IP_VER_4 4 /* version number for IPV4 */
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#define IP_VER_6 6 /* version number for IPV6 */
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#define IP_VER(ip_body) \
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((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)
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#define IP_PROT_ICMP 0x1 /* ICMP protocol */
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#define IP_PROT_IGMP 0x2 /* IGMP protocol */
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#define IP_PROT_TCP 0x6 /* TCP protocol */
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#define IP_PROT_UDP 0x11 /* UDP protocol type */
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#define IP_PROT_GRE 0x2f /* GRE protocol type */
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#define IP_PROT_ICMP6 0x3a /* ICMPv6 protocol type */
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/* IPV4 field offsets */
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#define IPV4_VER_HL_OFFSET 0 /* version and ihl byte offset */
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#define IPV4_TOS_OFFSET 1 /* type of service offset */
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#define IPV4_PKTLEN_OFFSET 2 /* packet length offset */
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#define IPV4_PKTFLAG_OFFSET 6 /* more-frag,dont-frag flag offset */
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#define IPV4_PROT_OFFSET 9 /* protocol type offset */
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#define IPV4_CHKSUM_OFFSET 10 /* IP header checksum offset */
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#define IPV4_SRC_IP_OFFSET 12 /* src IP addr offset */
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#define IPV4_DEST_IP_OFFSET 16 /* dest IP addr offset */
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#define IPV4_OPTIONS_OFFSET 20 /* IP options offset */
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#define IPV4_MIN_HEADER_LEN 20 /* Minimum size for an IP header (no options) */
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/* IPV4 field decodes */
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#define IPV4_VER_MASK 0xf0 /* IPV4 version mask */
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#define IPV4_VER_SHIFT 4 /* IPV4 version shift */
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#define IPV4_HLEN_MASK 0x0f /* IPV4 header length mask */
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#define IPV4_HLEN(ipv4_body) (4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))
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#define IPV4_HLEN_MIN (4 * 5) /* IPV4 header minimum length */
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#define IPV4_ADDR_LEN 4 /* IPV4 address length */
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#define IPV4_ADDR_NULL(a) ((((uint8 *)(a))[0] | ((uint8 *)(a))[1] | \
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((uint8 *)(a))[2] | ((uint8 *)(a))[3]) == 0)
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#define IPV4_ADDR_BCAST(a) ((((uint8 *)(a))[0] & ((uint8 *)(a))[1] & \
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((uint8 *)(a))[2] & ((uint8 *)(a))[3]) == 0xff)
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#define IPV4_TOS_DSCP_MASK 0xfc /* DiffServ codepoint mask */
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#define IPV4_TOS_DSCP_SHIFT 2 /* DiffServ codepoint shift */
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#define IPV4_TOS(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])
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#define IPV4_TOS_PREC_MASK 0xe0 /* Historical precedence mask */
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#define IPV4_TOS_PREC_SHIFT 5 /* Historical precedence shift */
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#define IPV4_TOS_LOWDELAY 0x10 /* Lowest delay requested */
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#define IPV4_TOS_THROUGHPUT 0x8 /* Best throughput requested */
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#define IPV4_TOS_RELIABILITY 0x4 /* Most reliable delivery requested */
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#define IPV4_TOS_ROUTINE 0
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#define IPV4_TOS_PRIORITY 1
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#define IPV4_TOS_IMMEDIATE 2
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#define IPV4_TOS_FLASH 3
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#define IPV4_TOS_FLASHOVERRIDE 4
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#define IPV4_TOS_CRITICAL 5
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#define IPV4_TOS_INETWORK_CTRL 6
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#define IPV4_TOS_NETWORK_CTRL 7
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#define IPV4_PROT(ipv4_body) (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])
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#define IPV4_FRAG_RESV 0x8000 /* Reserved */
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#define IPV4_FRAG_DONT 0x4000 /* Don't fragment */
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#define IPV4_FRAG_MORE 0x2000 /* More fragments */
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#define IPV4_FRAG_OFFSET_MASK 0x1fff /* Fragment offset */
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#define IPV4_ADDR_STR_LEN 16 /* Max IP address length in string format */
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/* IPV4 packet formats */
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BWL_PRE_PACKED_STRUCT struct ipv4_addr {
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uint8 addr[IPV4_ADDR_LEN];
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} BWL_POST_PACKED_STRUCT;
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BWL_PRE_PACKED_STRUCT struct ipv4_hdr {
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uint8 version_ihl; /* Version and Internet Header Length */
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uint8 tos; /* Type Of Service */
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uint16 tot_len; /* Number of bytes in packet (max 65535) */
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uint16 id;
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uint16 frag; /* 3 flag bits and fragment offset */
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uint8 ttl; /* Time To Live */
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uint8 prot; /* Protocol */
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uint16 hdr_chksum; /* IP header checksum */
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uint8 src_ip[IPV4_ADDR_LEN]; /* Source IP Address */
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uint8 dst_ip[IPV4_ADDR_LEN]; /* Destination IP Address */
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} BWL_POST_PACKED_STRUCT;
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/* IPV6 field offsets */
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#define IPV6_PAYLOAD_LEN_OFFSET 4 /* payload length offset */
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#define IPV6_NEXT_HDR_OFFSET 6 /* next header/protocol offset */
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#define IPV6_HOP_LIMIT_OFFSET 7 /* hop limit offset */
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#define IPV6_SRC_IP_OFFSET 8 /* src IP addr offset */
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#define IPV6_DEST_IP_OFFSET 24 /* dst IP addr offset */
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/* IPV6 field decodes */
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#define IPV6_TRAFFIC_CLASS(ipv6_body) \
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(((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) | \
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((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4))
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#define IPV6_FLOW_LABEL(ipv6_body) \
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(((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) | \
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(((uint8 *)(ipv6_body))[2] << 8) | \
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(((uint8 *)(ipv6_body))[3]))
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#define IPV6_PAYLOAD_LEN(ipv6_body) \
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((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) | \
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((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1])
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#define IPV6_NEXT_HDR(ipv6_body) \
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(((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET])
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#define IPV6_PROT(ipv6_body) IPV6_NEXT_HDR(ipv6_body)
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#define IPV6_ADDR_LEN 16 /* IPV6 address length */
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/* IPV4 TOS or IPV6 Traffic Classifier or 0 */
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#define IP_TOS46(ip_body) \
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(IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \
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IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0)
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#define IP_DSCP46(ip_body) (IP_TOS46(ip_body) >> IPV4_TOS_DSCP_SHIFT);
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/* IPV4 or IPV6 Protocol Classifier or 0 */
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#define IP_PROT46(ip_body) \
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(IP_VER(ip_body) == IP_VER_4 ? IPV4_PROT(ip_body) : \
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IP_VER(ip_body) == IP_VER_6 ? IPV6_PROT(ip_body) : 0)
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/* IPV6 extension headers (options) */
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#define IPV6_EXTHDR_HOP 0
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#define IPV6_EXTHDR_ROUTING 43
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#define IPV6_EXTHDR_FRAGMENT 44
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#define IPV6_EXTHDR_AUTH 51
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#define IPV6_EXTHDR_NONE 59
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#define IPV6_EXTHDR_DEST 60
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#define IPV6_EXTHDR(prot) (((prot) == IPV6_EXTHDR_HOP) || \
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((prot) == IPV6_EXTHDR_ROUTING) || \
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((prot) == IPV6_EXTHDR_FRAGMENT) || \
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((prot) == IPV6_EXTHDR_AUTH) || \
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((prot) == IPV6_EXTHDR_NONE) || \
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((prot) == IPV6_EXTHDR_DEST))
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#define IPV6_MIN_HLEN 40
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#define IPV6_EXTHDR_LEN(eh) ((((struct ipv6_exthdr *)(eh))->hdrlen + 1) << 3)
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BWL_PRE_PACKED_STRUCT struct ipv6_exthdr {
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uint8 nexthdr;
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uint8 hdrlen;
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} BWL_POST_PACKED_STRUCT;
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BWL_PRE_PACKED_STRUCT struct ipv6_exthdr_frag {
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uint8 nexthdr;
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uint8 rsvd;
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uint16 frag_off;
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uint32 ident;
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} BWL_POST_PACKED_STRUCT;
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static INLINE int32
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ipv6_exthdr_len(uint8 *h, uint8 *proto)
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{
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uint16 len = 0, hlen;
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struct ipv6_exthdr *eh = (struct ipv6_exthdr *)h;
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while (IPV6_EXTHDR(eh->nexthdr)) {
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if (eh->nexthdr == IPV6_EXTHDR_NONE)
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return -1;
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else if (eh->nexthdr == IPV6_EXTHDR_FRAGMENT)
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hlen = 8U;
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else if (eh->nexthdr == IPV6_EXTHDR_AUTH)
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hlen = (uint16)((eh->hdrlen + 2U) << 2U);
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else
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hlen = (uint16)IPV6_EXTHDR_LEN(eh);
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len += hlen;
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eh = (struct ipv6_exthdr *)(h + len);
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}
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*proto = eh->nexthdr;
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return len;
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}
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#define IPV4_ISMULTI(a) (((a) & 0xf0000000) == 0xe0000000)
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#define IPV4_MCAST_TO_ETHER_MCAST(ipv4, ether) \
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{ \
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ether[0] = 0x01; \
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ether[1] = 0x00; \
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ether[2] = 0x5E; \
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ether[3] = (ipv4 & 0x7f0000) >> 16; \
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ether[4] = (ipv4 & 0xff00) >> 8; \
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ether[5] = (ipv4 & 0xff); \
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}
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/* This marks the end of a packed structure section. */
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#include <packed_section_end.h>
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#define IPV4_ADDR_STR "%d.%d.%d.%d"
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#define IPV4_ADDR_TO_STR(addr) ((uint32)addr & 0xff000000) >> 24, \
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((uint32)addr & 0x00ff0000) >> 16, \
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((uint32)addr & 0x0000ff00) >> 8, \
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((uint32)addr & 0x000000ff)
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#endif /* _bcmip_h_ */
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