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Annotation of cci/sys/netinet/ip_var.h, revision 1.1

1.1     ! root        1: /*     ip_var.h        6.1     83/07/29        */
        !             2: 
        !             3: /*
        !             4:  * Overlay for ip header used by other protocols (tcp, udp).
        !             5:  */
        !             6: struct ipovly {
        !             7:        caddr_t ih_next, ih_prev;       /* for protocol sequence q's */
        !             8:        u_char  ih_x1;                  /* (unused) */
        !             9:        u_char  ih_pr;                  /* protocol */
        !            10:        short   ih_len;                 /* protocol length */
        !            11:        struct  in_addr ih_src;         /* source internet address */
        !            12:        struct  in_addr ih_dst;         /* destination internet address */
        !            13: };
        !            14: 
        !            15: /*
        !            16:  * Ip reassembly queue structure.  Each fragment
        !            17:  * being reassembled is attached to one of these structures.
        !            18:  * They are timed out after ipq_ttl drops to 0, and may also
        !            19:  * be reclaimed if memory becomes tight.
        !            20:  */
        !            21: struct ipq {
        !            22:        struct  ipq *next,*prev;        /* to other reass headers */
        !            23:        u_char  ipq_ttl;                /* time for reass q to live */
        !            24:        u_char  ipq_p;                  /* protocol of this fragment */
        !            25:        u_short ipq_id;                 /* sequence id for reassembly */
        !            26:        struct  ipasfrag *ipq_next,*ipq_prev;
        !            27:                                        /* to ip headers of fragments */
        !            28:        struct  in_addr ipq_src,ipq_dst;
        !            29: };
        !            30: 
        !            31: /*
        !            32:  * Ip header, when holding a fragment.
        !            33:  *
        !            34:  * Note: ipf_next must be at same offset as ipq_next above
        !            35:  */
        !            36: struct ipasfrag {
        !            37: #ifdef VAX 
        !            38:        u_char  ip_hl:4,
        !            39:                ip_v:4;
        !            40: #else                                  /* Default to TAHOE style */
        !            41:        u_char  ip_v:4,
        !            42:                ip_hl:4;
        !            43: #endif VAX
        !            44:        u_char  ipf_mff;                /* copied from (ip_off&IP_MF) */
        !            45:        short   ip_len;
        !            46:        u_short ip_id;
        !            47:        short   ip_off;
        !            48:        u_char  ip_ttl;
        !            49:        u_char  ip_p;
        !            50:        u_short ip_sum;
        !            51:        struct  ipasfrag *ipf_next;     /* next fragment */
        !            52:        struct  ipasfrag *ipf_prev;     /* previous fragment */
        !            53: };
        !            54: 
        !            55: struct ipstat {
        !            56:        int     ips_badsum;             /* checksum bad */
        !            57:        int     ips_tooshort;           /* packet too short */
        !            58:        int     ips_toosmall;           /* not enough data */
        !            59:        int     ips_badhlen;            /* ip header length < data size */
        !            60:        int     ips_badlen;             /* ip length < ip header length */
        !            61: };
        !            62: 
        !            63: struct  ipstudy {
        !            64:        int     ips_ssnoifaddr;         /* cant deliver; strict routing and
        !            65:                                           cant find interface with addr */
        !            66:        int     ips_ssnoifnet;          /* cant deliver; strict routing and
        !            67:                                           cant find interface with net# */
        !            68:        int     ips_oplen;              /* option len is bad */
        !            69:        int     ips_noif;               /* no inet interface??? */
        !            70:        int     ips_badopt;             /* bad option field */
        !            71:        int     ips_cantdiffnethost;    /* cant tell between net and host */
        !            72:        int     ips_timxceed;           /* time exceeded */
        !            73:        int     ips_msgsize;            /* message size too big? */
        !            74:        int     ips_badport;            /* bad port */
        !            75:        int     ips_unreach;            /* host or net is down */
        !            76: };
        !            77: 
        !            78: #ifdef KERNEL
        !            79: /* flags passed to ip_output as last parameter */
        !            80: #define        IP_FORWARDING           0x1     /* most of ip header exists */
        !            81: #define        IP_ROUTETOIF            0x10    /* same as SO_DONTROUTE */
        !            82: #define        IP_ALLOWBROADCAST       SS_PRIV /* can send broadcast packets */
        !            83: 
        !            84: struct ipstat  ipstat;
        !            85: struct ipstudy ipstudy;
        !            86: struct ipq     ipq;                    /* ip reass. queue */
        !            87: u_short        ip_id;                          /* ip packet ctr, for ids */
        !            88: #endif

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