net/inet/ip.h

/* */
   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions for the IP module.
   7  *
   8  * Version:     @(#)ip.h        1.0.2   05/07/93
   9  *
  10  * Authors:     Ross Biro, <bir7@leland.Stanford.Edu>
  11  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *              Alan Cox, <gw4pts@gw4pts.ampr.org>
  13  *
  14  *              This program is free software; you can redistribute it and/or
  15  *              modify it under the terms of the GNU General Public License
  16  *              as published by the Free Software Foundation; either version
  17  *              2 of the License, or (at your option) any later version.
  18  */
  19 #ifndef _IP_H
  20 #define _IP_H
  21 
  22 
  23 #include <linux/ip.h>
  24 
  25 #ifndef _SNMP_H
  26 #include "snmp.h"
  27 #endif
  28 
  29 #include "sock.h"       /* struct sock */
  30 
  31 /* IP flags. */
  32 #define IP_CE           0x8000          /* Flag: "Congestion"           */
  33 #define IP_DF           0x4000          /* Flag: "Don't Fragment"       */
  34 #define IP_MF           0x2000          /* Flag: "More Fragments"       */
  35 #define IP_OFFSET       0x1FFF          /* "Fragment Offset" part       */
  36 
  37 #define IP_FRAG_TIME    (30 * HZ)               /* fragment lifetime    */
  38 
  39 
  40 /* Describe an IP fragment. */
  41 struct ipfrag {
  42   int           offset;         /* offset of fragment in IP datagram    */
  43   int           end;            /* last byte of data in datagram        */
  44   int           len;            /* length of this fragment              */
  45   struct sk_buff *skb;                  /* complete received fragment           */
  46   unsigned char         *ptr;           /* pointer into real fragment data      */
  47   struct ipfrag         *next;          /* linked list pointers                 */
  48   struct ipfrag         *prev;
  49 };
  50 
  51 /* Describe an entry in the "incomplete datagrams" queue. */
  52 struct ipq       {
  53   unsigned char         *mac;           /* pointer to MAC header                */
  54   struct iphdr  *iph;           /* pointer to IP header                 */
  55   int           len;            /* total length of original datagram    */
  56   short                 ihlen;          /* length of the IP header              */
  57   short         maclen;         /* length of the MAC header             */
  58   struct timer_list timer;      /* when will this queue expire?         */
  59   struct ipfrag         *fragments;     /* linked list of received fragments    */
  60   struct ipq    *next;          /* linked list pointers                 */
  61   struct ipq    *prev;
  62   struct device *dev;           /* Device - for icmp replies */
  63 };
  64 
  65 
  66 extern int              backoff(int n);
  67 
  68 extern void             ip_print(const struct iphdr *ip);
  69 extern int              ip_ioctl(struct sock *sk, int cmd,
  70                                  unsigned long arg);
  71 extern void             ip_route_check(unsigned long daddr);
  72 extern int              ip_build_header(struct sk_buff *skb,
  73                                         unsigned long saddr,
  74                                         unsigned long daddr,
  75                                         struct device **dev, int type,
  76                                         struct options *opt, int len,
  77                                         int tos,int ttl);
  78 extern unsigned short   ip_compute_csum(unsigned char * buff, int len);
  79 extern int              ip_rcv(struct sk_buff *skb, struct device *dev,
  80                                struct packet_type *pt);
  81 extern void             ip_queue_xmit(struct sock *sk,
  82                                       struct device *dev, struct sk_buff *skb,
  83                                       int free);
  84 extern void             ip_retransmit(struct sock *sk, int all);
  85 extern void             ip_do_retransmit(struct sock *sk, int all);
  86 extern int              ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen);
  87 extern int              ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen);
  88 extern void             ip_init(void);
  89 
  90 extern struct ip_mib    ip_statistics;
  91 #endif  /* _IP_H */
/* */
root/net/inet/ip.h

INCLUDED FROM
