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- #ifndef __netinet_ip_var_h
- #define __netinet_ip_var_h
-
- /* Freenet programmers interface - netinet/ip_var.h - 23/5/95 */
-
- /*
- * Overlay for ip header used by other protocols (tcp, udp).
- */
- struct ipovly {
- caddr_t ih_next, ih_prev; /* for protocol sequence q's */
- u_char ih_x1; /* (unused) */
- u_char ih_pr; /* protocol */
- short ih_len; /* protocol length */
- struct in_addr ih_src; /* source internet address */
- struct in_addr ih_dst; /* destination internet address */
- };
-
- /*
- * Ip reassembly queue structure. Each fragment
- * being reassembled is attached to one of these structures.
- * They are timed out after ipq_ttl drops to 0, and may also
- * be reclaimed if memory becomes tight.
- */
- struct ipq {
- struct ipq *next,*prev; /* to other reass headers */
- u_char ipq_ttl; /* time for reass q to live */
- u_char ipq_p; /* protocol of this fragment */
- u_short ipq_id; /* sequence id for reassembly */
- struct ipasfrag *ipq_next,*ipq_prev;
- /* to ip headers of fragments */
- struct in_addr ipq_src,ipq_dst;
- };
-
- /*
- * Ip header, when holding a fragment.
- *
- * Note: ipf_next must be at same offset as ipq_next above
- */
- struct ipasfrag {
- u_char ip_hl:4,
- ip_v:4;
- u_char ipf_mff; /* XXX overlays ip_tos: use low bit
- * to avoid destroying tos;
- * copied from (ip_off&IP_MF) */
- short ip_len;
- u_short ip_id;
- short ip_off;
- u_char ip_ttl;
- u_char ip_p;
- u_short ip_sum;
- struct ipasfrag *ipf_next; /* next fragment */
- struct ipasfrag *ipf_prev; /* previous fragment */
- };
-
- /*
- * Structure stored in mbuf in inpcb.ip_options
- * and passed to ip_output when ip options are in use.
- * The actual length of the options (including ipopt_dst)
- * is in m_len.
- */
- #define MAX_IPOPTLEN 40
-
- struct ipoption {
- struct in_addr ipopt_dst; /* first-hop dst if source routed */
- char ipopt_list[MAX_IPOPTLEN]; /* options proper */
- };
-
- /*
- * Structure attached to inpcb.ip_moptions and
- * passed to ip_output when IP multicast options are in use.
- */
- struct ip_moptions {
- struct ifnet *imo_multicast_ifp; /* ifp for outgoing multicasts */
- u_char imo_multicast_ttl; /* TTL for outgoing multicasts */
- u_char imo_multicast_loop; /* 1 => hear sends if a member */
- u_short imo_num_memberships; /* no. memberships this socket */
- struct in_multi *imo_membership[IP_MAX_MEMBERSHIPS];
- };
-
- struct ipstat {
- u_long ips_total; /* total packets received */
- u_long ips_badsum; /* checksum bad */
- u_long ips_tooshort; /* packet too short */
- u_long ips_toosmall; /* not enough data */
- u_long ips_badhlen; /* ip header length < data size */
- u_long ips_badlen; /* ip length < ip header length */
- u_long ips_fragments; /* fragments received */
- u_long ips_fragdropped; /* frags dropped (dups, out of space) */
- u_long ips_fragtimeout; /* fragments timed out */
- u_long ips_forward; /* packets forwarded */
- u_long ips_cantforward; /* packets rcvd for unreachable dest */
- u_long ips_redirectsent; /* packets forwarded on same net */
- u_long ips_noproto; /* unknown or unsupported protocol */
- u_long ips_delivered; /* datagrams delivered to upper level*/
- u_long ips_localout; /* total ip packets generated here */
- u_long ips_odropped; /* lost packets due to nobufs, etc. */
- u_long ips_reassembled; /* total packets reassembled ok */
- u_long ips_fragmented; /* datagrams sucessfully fragmented */
- u_long ips_ofragments; /* output fragments created */
- u_long ips_cantfrag; /* don't fragment flag was set, etc. */
- u_long ips_badoptions; /* error in option processing */
- u_long ips_noroute; /* packets discarded due to no route */
- u_long ips_badvers; /* ip version != 4 */
- u_long ips_rawout; /* total raw ip packets generated */
- };
-
- /*
- * Maximum size of the IP options for a packet
- */
- #define MAX_IPOPTLEN 40
-
- #endif
-