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Annotation of cci/sys/netinet/ip_var.h, revision 1.1.1.1

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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