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Diffstat (limited to 'package/broadcom-57xx/src/proto/bcmip.h')
| -rw-r--r-- | package/broadcom-57xx/src/proto/bcmip.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/package/broadcom-57xx/src/proto/bcmip.h b/package/broadcom-57xx/src/proto/bcmip.h new file mode 100644 index 0000000000..11f63f3208 --- /dev/null +++ b/package/broadcom-57xx/src/proto/bcmip.h @@ -0,0 +1,152 @@ +/* + * Copyright 2007, Broadcom Corporation + * All Rights Reserved. + * + * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY + * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM + * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS + * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. + * + * Fundamental constants relating to IP Protocol + * + * $Id: bcmip.h,v 1.1.1.4 2007/05/31 08:00:41 michael Exp $ + */ + +#ifndef _bcmip_h_ +#define _bcmip_h_ + +/* enable structure packing */ +#if defined(__GNUC__) +#define PACKED __attribute__((packed)) +#else +#pragma pack(1) +#define PACKED +#endif + + +/* 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_TCP 0x6 /* TCP protocol */ +#define IP_PROT_UDP 0x11 /* UDP 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, no options only. */ +#define IPV4_NO_OPTIONS_HDR_LEN 20 +#define IPV4_NO_OPTIONS_PAYLOAD(ip_hdr) (&(((uint8 *)(ip_hdr))[IPV4_NO_OPTIONS_HDR_LEN])) + +#define IPV4_PAYLOAD_LEN(ip_body) \ + (((int)(((uint8 *)(ip_body))[IPV4_PKTLEN_OFFSET + 0]) << 8) | \ + ((uint8 *)(ip_body))[IPV4_PKTLEN_OFFSET + 1]) + +/* IPV4 packet formats */ +struct ipv4_addr { + uint8 addr[IPV4_ADDR_LEN]; +} PACKED; + +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 */ +} PACKED; + +/* 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_TOS(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) + +#undef PACKED +#if !defined(__GNUC__) +#pragma pack() +#endif + +#endif /* _bcmip_h_ */ |