/* * Copyright (C) 1999-2013, 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 384540 2013-02-12 04:28:58Z $ */ #ifndef _bcmip_h_ #define _bcmip_h_ #ifndef _TYPEDEFS_H_ #include #endif /* This marks the start of a packed structure section. */ #include /* 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 */ #define IPV4_MIN_HEADER_LEN 20 /* Minimum size for an IP header (no options) */ /* 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; } #define IPV4_ISMULTI(a) (((a) & 0xf0000000) == 0xe0000000) /* This marks the end of a packed structure section. */ #include #endif /* _bcmip_h_ */