include/net/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/config.h>
  24 #include <linux/types.h>
  25 #include <linux/socket.h>
  26 #include <linux/ip.h>
  27 #include <linux/netdevice.h>
  28 
  29 #ifndef _SNMP_H
  30 #include "snmp.h"
  31 #endif
  32 
  33 #include "sock.h"       /* struct sock */
  34 
  35 /* IP flags. */
  36 #define IP_CE           0x8000          /* Flag: "Congestion"           */
  37 #define IP_DF           0x4000          /* Flag: "Don't Fragment"       */
  38 #define IP_MF           0x2000          /* Flag: "More Fragments"       */
  39 #define IP_OFFSET       0x1FFF          /* "Fragment Offset" part       */
  40 
  41 #define IP_FRAG_TIME    (30 * HZ)               /* fragment lifetime    */
  42 
  43 #ifdef CONFIG_IP_MULTICAST
  44 extern void             ip_mc_dropsocket(struct sock *);
  45 extern void             ip_mc_dropdevice(struct device *dev);
  46 extern int              ip_mc_procinfo(char *, char **, off_t, int);
  47 #define MULTICAST(x)    (IN_MULTICAST(htonl(x)))
  48 #endif
  49  
  50 
  51 /* Describe an IP fragment. */
  52 struct ipfrag {
  53   int           offset;         /* offset of fragment in IP datagram    */
  54   int           end;            /* last byte of data in datagram        */
  55   int           len;            /* length of this fragment              */
  56   struct sk_buff *skb;                  /* complete received fragment           */
  57   unsigned char         *ptr;           /* pointer into real fragment data      */
  58   struct ipfrag         *next;          /* linked list pointers                 */
  59   struct ipfrag         *prev;
  60 };
  61 
  62 /* Describe an entry in the "incomplete datagrams" queue. */
  63 struct ipq       {
  64   unsigned char         *mac;           /* pointer to MAC header                */
  65   struct iphdr  *iph;           /* pointer to IP header                 */
  66   int           len;            /* total length of original datagram    */
  67   short                 ihlen;          /* length of the IP header              */
  68   short         maclen;         /* length of the MAC header             */
  69   struct timer_list timer;      /* when will this queue expire?         */
  70   struct ipfrag         *fragments;     /* linked list of received fragments    */
  71   struct ipq    *next;          /* linked list pointers                 */
  72   struct ipq    *prev;
  73   struct device *dev;           /* Device - for icmp replies */
  74 };
  75 
  76 
  77 extern int              backoff(int n);
  78 
  79 extern void             ip_print(const struct iphdr *ip);
  80 extern int              ip_ioctl(struct sock *sk, int cmd,
  81                                  unsigned long arg);
  82 extern void             ip_route_check(unsigned long daddr);
  83 extern int              ip_build_header(struct sk_buff *skb,
  84                                         unsigned long saddr,
  85                                         unsigned long daddr,
  86                                         struct device **dev, int type,
  87                                         struct options *opt, int len,
  88                                         int tos,int ttl);
  89 /*extern unsigned short ip_compute_csum(unsigned char * buff, int len);*/
  90 extern int              ip_rcv(struct sk_buff *skb, struct device *dev,
  91                                struct packet_type *pt);
  92 extern void             ip_forward(struct sk_buff *skb, struct device *dev, int is_frag, unsigned long target_addr, int target_strict);                      
  93 extern void             ip_send_check(struct iphdr *ip);
  94 extern int              ip_id_count;                      
  95 extern void             ip_queue_xmit(struct sock *sk,
  96                                       struct device *dev, struct sk_buff *skb,
  97                                       int free);
  98 extern int              ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen);
  99 extern int              ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen);
 100 extern void             ip_init(void);
 101 extern int              ip_build_xmit(struct sock *sk,
 102                                       void getfrag (void *,
 103                                                     int,
 104                                                     char *,
 105                                                     unsigned int,
 106                                                     unsigned int),
 107                                       void *frag,
 108                                       unsigned short int length,
 109                                       int daddr,
 110                                       int flags,
 111                                       int type);
 112 
 113 extern struct ip_mib    ip_statistics;
 114 
 115 #endif  /* _IP_H */
/* */
root/include/net/ip.h

INCLUDED FROM
