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- #ifndef _IP_H
- #define _IP_H
-
- #ifndef _GLOBAL_H
- #include "global.h"
- #endif
-
- #ifndef _MBUF_H
- #include "mbuf.h"
- #endif
-
- #ifndef _IFACE_H
- #include "iface.h"
- #endif
-
- #ifndef _INTERNET_H
- #include "internet.h"
- #endif
-
- #ifndef _TIMER_H
- #include "timer.h"
- #endif
-
- #define TLB 30 /* Default reassembly timeout, sec */
- #define IPVERSION 4
- #define IP_CS_OLD 1 /* use saved checksum */
- #define IP_CS_NEW 0 /* calculate checksum */
-
- extern char Hashtab[]; /* Modulus lookup table */
-
- /* SNMP MIB variables, used for statistics and control. See RFC 1066 */
- extern struct mib_entry Ip_mib[];
- #define ipForwarding Ip_mib[1].value.integer
- #define ipDefaultTTL Ip_mib[2].value.integer
- #define ipInReceives Ip_mib[3].value.integer
- #define ipInHdrErrors Ip_mib[4].value.integer
- #define ipInAddrErrors Ip_mib[5].value.integer
- #define ipForwDatagrams Ip_mib[6].value.integer
- #define ipInUnknownProtos Ip_mib[7].value.integer
- #define ipInDiscards Ip_mib[8].value.integer
- #define ipInDelivers Ip_mib[9].value.integer
- #define ipOutRequests Ip_mib[10].value.integer
- #define ipOutDiscards Ip_mib[11].value.integer
- #define ipOutNoRoutes Ip_mib[12].value.integer
- #define ipReasmTimeout Ip_mib[13].value.integer
- #define ipReasmReqds Ip_mib[14].value.integer
- #define ipReasmOKs Ip_mib[15].value.integer
- #define ipReasmFails Ip_mib[16].value.integer
- #define ipFragOKs Ip_mib[17].value.integer
- #define ipFragFails Ip_mib[18].value.integer
- #define ipFragCreates Ip_mib[19].value.integer
-
- #define NUMIPMIB 19
-
- /* IP header, INTERNAL representation */
- #define IPLEN 20 /* Length of standard IP header */
- #define IP_MAXOPT 40 /* Largest option field, bytes */
- struct ip {
- int32 source; /* Source address */
- int32 dest; /* Destination address */
- int16 length; /* Total length */
- int16 id; /* Identification */
- int16 offset; /* Fragment offset in bytes */
- int16 checksum; /* Header checksum */
-
- struct {
- char congest; /* Congestion experienced bit (exp) */
- char df; /* Don't fragment flag */
- char mf; /* More Fragments flag */
- } flags;
-
- char version; /* IP version number */
- char tos; /* Type of service */
- char ttl; /* Time to live */
- char protocol; /* Protocol */
- char optlen; /* Length of options field, bytes */
- char options[IP_MAXOPT];/* Options field */
- };
- #define NULLIP (struct ip *)0
-
- /* Fields in option type byte */
- #define OPT_COPIED 0x80 /* Copied-on-fragmentation flag */
- #define OPT_CLASS 0x60 /* Option class */
- #define OPT_NUMBER 0x1f /* Option number */
-
- /* IP option numbers */
- #define IP_EOL 0 /* End of options list */
- #define IP_NOOP 1 /* No Operation */
- #define IP_SECURITY 2 /* Security parameters */
- #define IP_LSROUTE 3 /* Loose Source Routing */
- #define IP_TIMESTAMP 4 /* Internet Timestamp */
- #define IP_RROUTE 7 /* Record Route */
- #define IP_STREAMID 8 /* Stream ID */
- #define IP_SSROUTE 9 /* Strict Source Routing */
-
- /* Timestamp option flags */
- #define TS_ONLY 0 /* Time stamps only */
- #define TS_ADDRESS 1 /* Addresses + Time stamps */
- #define TS_PRESPEC 3 /* Prespecified addresses only */
-
- /* IP routing table entry */
- struct route {
- struct route *prev; /* Linked list pointers */
- struct route *next;
- int32 target; /* Target IP address */
- unsigned int bits; /* Number of significant bits in target */
- int32 gateway; /* IP address of local gateway for this target */
- int32 metric; /* Hop count or whatever */
- struct iface *iface; /* Device interface structure */
- int flags;
- #define RTPRIVATE 0x1 /* Should the world be told of this route ? */
- #define RTTRIG 0x2 /* Trigger is pending for this route */
- struct timer timer; /* Time until aging of this entry */
- int32 uses; /* Usage count */
- };
- #define NULLROUTE (struct route *)0
- extern struct route *Routes[32][HASHMOD]; /* Routing table */
- extern struct route R_default; /* Default route entry */
-
- /* Cache for the last-used routing entry, speeds up the common case where
- * we handle a burst of packets to the same destination
- */
- struct rt_cache {
- int32 target;
- struct route *route;
- };
-
- /* Reassembly descriptor */
- struct reasm {
- struct reasm *next; /* Linked list pointer */
- struct timer timer; /* Reassembly timeout timer */
- struct frag *fraglist; /* Head of data fragment chain */
- int16 length; /* Entire datagram length, if known */
- int32 source; /* src/dest/id/protocol uniquely describe a datagram */
- int32 dest;
- int16 id;
- char protocol;
- };
- #define NULLREASM (struct reasm *)0
-
- /* Fragment descriptor in a reassembly list */
- struct frag {
- struct frag *prev; /* Previous fragment on list */
- struct frag *next; /* Next fragment */
- struct mbuf *buf; /* Actual fragment data */
- int16 offset; /* Starting offset of fragment */
- int16 last; /* Ending offset of fragment */
- };
- #define NULLFRAG (struct frag *)0
-
- extern struct reasm *Reasmq; /* The list of reassembly descriptors */
-
- /* Structure for handling raw IP user sockets */
- struct raw_ip {
- struct raw_ip *next; /* Linked list pointer */
-
- struct mbuf *rcvq; /* receive queue */
- void (*r_upcall) __ARGS((struct raw_ip *));
- int protocol; /* Protocol */
- int user; /* User linkage */
- };
- #define NULLRIP ((struct raw_ip *)0)
-
- /* Transport protocol link table */
- struct iplink {
- char proto;
- void (*funct) __ARGS((struct iface *,struct ip *,struct mbuf *,int));
- };
- extern struct iplink Iplink[];
-
- /* List of TCP port numbers to be given priority queuing */
- extern int Tcp_interact[];
-
- /* In ip.c: */
- void ip_garbage __ARGS((int drastic));
- void ip_recv __ARGS((struct iface *iface,struct ip *ip,struct mbuf *bp,
- int rxbroadcast));
- void ipip_recv __ARGS((struct iface *iface,struct ip *ip,struct mbuf *bp,
- int rxbroadcast));
- int ip_send __ARGS((int32 source,int32 dest,char protocol,char tos,char ttl,
- struct mbuf *bp,int16 length,int16 id,char df));
- struct raw_ip *raw_ip __ARGS((int protocol,void (*r_upcall) __ARGS((struct raw_ip *)) ));
- void del_ip __ARGS((struct raw_ip *rrp));
-
- /* In iproute.c: */
- void ipinit __ARGS((void));
- int16 ip_mtu __ARGS((int32 addr));
- void encap_tx __ARGS((int dev,void *arg1,void *unused));
- int ip_encap __ARGS((struct mbuf *bp,struct iface *iface,int32 gateway,int tos));
- void ip_proc __ARGS((struct iface *iface,struct mbuf *bp));
- int ip_route __ARGS((struct iface *i_iface,struct mbuf *bp,int rxbroadcast));
- int32 locaddr __ARGS((int32 addr));
- void rt_merge __ARGS((int trace));
- struct route *rt_add __ARGS((int32 target,unsigned int bits,int32 gateway,
- struct iface *iface,int32 metric,int32 ttl,char private));
- int rt_drop __ARGS((int32 target,unsigned int bits));
- struct route *rt_lookup __ARGS((int32 target));
- struct route *rt_blookup __ARGS((int32 target,unsigned int bits));
-
- /* In iphdr.c: */
- int16 cksum __ARGS((struct pseudo_header *ph,struct mbuf *m,int16 len));
- int16 eac __ARGS((int32 sum));
- struct mbuf *htonip __ARGS((struct ip *ip,struct mbuf *data,int cflag));
- int ntohip __ARGS((struct ip *ip,struct mbuf **bpp));
-
- /* In either lcsum.c or pcgen.asm: */
- int16 lcsum __ARGS((int16 *wp,int16 len));
-
- /* In ipsocket.c: */
- int so_ip_sock __ARGS((struct usock *up,int protocol));
- int so_ip_conn __ARGS((struct usock *up));
- int so_ip_recv __ARGS((struct usock *up,struct mbuf **bpp,char *from,
- int *fromlen));
- int so_ip_send __ARGS((struct usock *up,struct mbuf *bp,char *to));
- int so_ip_qlen __ARGS((struct usock *up,int rtx));
- int so_ip_close __ARGS((struct usock *up));
- int checkipaddr __ARGS((char *name,int namelen));
- char *ippsocket __ARGS((struct sockaddr *p));
-
- #endif /* _IP_H */
-