package/broadcom-wl/src/kmod/bcmip.h

   1 /*
   2  * Copyright 2006, Broadcom Corporation
   3  * All Rights Reserved.
   4  *
   5  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   6  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   7  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
   8  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
   9  *
  10  * Fundamental constants relating to IP Protocol
  11  *
  12  * $Id: bcmip.h,v 1.1.1.3 2006/02/27 03:43:16 honor Exp $
  13  */
  14
  15 #ifndef _bcmip_h_
  16 #define _bcmip_h_
  17
  18 /* IPV4 and IPV6 common */
  19 #define IP_VER_OFFSET           0x0     /* offset to version field */
  20 #define IP_VER_MASK             0xf0    /* version mask */
  21 #define IP_VER_SHIFT            4       /* version shift */
  22 #define IP_VER_4                4       /* version number for IPV4 */
  23 #define IP_VER_6                6       /* version number for IPV6 */
  24
  25 #define IP_VER(ip_body) \
  26         ((((uint8 *)(ip_body))[IP_VER_OFFSET] & IP_VER_MASK) >> IP_VER_SHIFT)
  27
  28 #define IP_PROT_ICMP            0x1     /* ICMP protocol */
  29 #define IP_PROT_TCP             0x6     /* TCP protocol */
  30 #define IP_PROT_UDP             0x11    /* UDP protocol type */
  31
  32 /* IPV4 field offsets */
  33 #define IPV4_VER_HL_OFFSET      0       /* version and ihl byte offset */
  34 #define IPV4_TOS_OFFSET         1       /* type of service offset */
  35 #define IPV4_PROT_OFFSET        9       /* protocol type offset */
  36 #define IPV4_CHKSUM_OFFSET      10      /* IP header checksum offset */
  37 #define IPV4_SRC_IP_OFFSET      12      /* src IP addr offset */
  38 #define IPV4_DEST_IP_OFFSET     16      /* dest IP addr offset */
  39
  40 /* IPV4 field decodes */
  41 #define IPV4_VER_MASK           0xf0    /* IPV4 version mask */
  42 #define IPV4_VER_SHIFT          4       /* IPV4 version shift */
  43
  44 #define IPV4_HLEN_MASK          0x0f    /* IPV4 header length mask */
  45 #define IPV4_HLEN(ipv4_body)    (4 * (((uint8 *)(ipv4_body))[IPV4_VER_HL_OFFSET] & IPV4_HLEN_MASK))
  46
  47 #define IPV4_ADDR_LEN           4       /* IPV4 address length */
  48
  49 #define IPV4_ADDR_NULL(a)       ((((uint8 *)(a))[0] | ((uint8 *)(a))[1] | \
  50                                   ((uint8 *)(a))[2] | ((uint8 *)(a))[3]) == 0)
  51
  52 #define IPV4_TOS_DSCP_MASK      0xfc    /* DiffServ codepoint mask */
  53 #define IPV4_TOS_DSCP_SHIFT     2       /* DiffServ codepoint shift */
  54
  55 #define IPV4_TOS(ipv4_body)     (((uint8 *)(ipv4_body))[IPV4_TOS_OFFSET])
  56
  57 #define IPV4_TOS_PREC_MASK      0xe0    /* Historical precedence mask */
  58 #define IPV4_TOS_PREC_SHIFT     5       /* Historical precedence shift */
  59
  60 #define IPV4_TOS_LOWDELAY       0x10    /* Lowest delay requested */
  61 #define IPV4_TOS_THROUGHPUT     0x8     /* Best throughput requested */
  62 #define IPV4_TOS_RELIABILITY    0x4     /* Most reliable delivery requested */
  63
  64 #define IPV4_PROT(ipv4_body)    (((uint8 *)(ipv4_body))[IPV4_PROT_OFFSET])
  65
  66 #define IPV4_ADDR_STR_LEN       16      /* Max IP address length in string format */
  67
  68 /* IPV6 field offsets */
  69 #define IPV6_PAYLOAD_LEN_OFFSET 4       /* payload length offset */
  70 #define IPV6_NEXT_HDR_OFFSET    6       /* next header/protocol offset */
  71 #define IPV6_HOP_LIMIT_OFFSET   7       /* hop limit offset */
  72 #define IPV6_SRC_IP_OFFSET      8       /* src IP addr offset */
  73 #define IPV6_DEST_IP_OFFSET     24      /* dst IP addr offset */
  74
  75 /* IPV6 field decodes */
  76 #define IPV6_TRAFFIC_CLASS(ipv6_body) \
  77         (((((uint8 *)(ipv6_body))[0] & 0x0f) << 4) | \
  78          ((((uint8 *)(ipv6_body))[1] & 0xf0) >> 4))
  79
  80 #define IPV6_FLOW_LABEL(ipv6_body) \
  81         (((((uint8 *)(ipv6_body))[1] & 0x0f) << 16) | \
  82          (((uint8 *)(ipv6_body))[2] << 8) | \
  83          (((uint8 *)(ipv6_body))[3]))
  84
  85 #define IPV6_PAYLOAD_LEN(ipv6_body) \
  86         ((((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 0] << 8) | \
  87          ((uint8 *)(ipv6_body))[IPV6_PAYLOAD_LEN_OFFSET + 1])
  88
  89 #define IPV6_NEXT_HDR(ipv6_body) \
  90         (((uint8 *)(ipv6_body))[IPV6_NEXT_HDR_OFFSET])
  91
  92 #define IPV6_PROT(ipv6_body)    IPV6_NEXT_HDR(ipv6_body)
  93
  94 #define IPV6_ADDR_LEN           16      /* IPV6 address length */
  95
  96 /* IPV4 TOS or IPV6 Traffic Classifier or 0 */
  97 #define IP_TOS(ip_body) \
  98         (IP_VER(ip_body) == IP_VER_4 ? IPV4_TOS(ip_body) : \
  99          IP_VER(ip_body) == IP_VER_6 ? IPV6_TRAFFIC_CLASS(ip_body) : 0)
 100
 101 #endif  /* _bcmip_h_ */