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  *
  13  *              This program is free software; you can redistribute it and/or
  14  *              modify it under the terms of the GNU General Public License
  15  *              as published by the Free Software Foundation; either version
  16  *              2 of the License, or (at your option) any later version.
  17  */
  18 #ifndef _IP_H
  19 #define _IP_H
  20 
  21 
  22 #include <linux/ip.h>
  23 
  24 
  25 #include "sock.h"       /* struct sock */
  26 
  27 /* IP flags. */
  28 #define IP_CE           0x8000          /* Flag: "Congestion"           */
  29 #define IP_DF           0x4000          /* Flag: "Don't Fragment"       */
  30 #define IP_MF           0x2000          /* Flag: "More Fragments"       */
  31 #define IP_OFFSET       0x1FFF          /* "Fragment Offset" part       */
  32 
  33 #define IP_FRAG_TIME    (30 * HZ)               /* fragment lifetime    */
  34 
  35 
  36 /* Describe an IP fragment. */
  37 struct ipfrag {
  38   int           offset;         /* offset of fragment in IP datagram    */
  39   int           end;            /* last byte of data in datagram        */
  40   int           len;            /* length of this fragment              */
  41   struct sk_buff *skb;                  /* complete received fragment           */
  42   unsigned char         *ptr;           /* pointer into real fragment data      */
  43   struct ipfrag         *next;          /* linked list pointers                 */
  44   struct ipfrag         *prev;
  45 };
  46 
  47 /* Describe an entry in the "incomplete datagrams" queue. */
  48 struct ipq       {
  49   unsigned char         *mac;           /* pointer to MAC header                */
  50   struct iphdr  *iph;           /* pointer to IP header                 */
  51   int           len;            /* total length of original datagram    */
  52   short                 ihlen;          /* length of the IP header              */
  53   short         maclen;         /* length of the MAC header             */
  54   struct timer_list timer;      /* when will this queue expire?         */
  55   struct ipfrag         *fragments;     /* linked list of received fragments    */
  56   struct ipq    *next;          /* linked list pointers                 */
  57   struct ipq    *prev;
  58   struct device *dev;           /* Device - for icmp replies */
  59 };
  60 
  61 
  62 extern int              backoff(int n);
  63 
  64 extern void             ip_print(struct iphdr *ip);
  65 extern int              ip_ioctl(struct sock *sk, int cmd,
  66                                  unsigned long arg);
  67 extern void             ip_route_check(unsigned long daddr);
  68 extern int              ip_build_header(struct sk_buff *skb,
  69                                         unsigned long saddr,
  70                                         unsigned long daddr,
  71                                         struct device **dev, int type,
  72                                         struct options *opt, int len,
  73                                         int tos,int ttl);
  74 extern unsigned short   ip_compute_csum(unsigned char * buff, int len);
  75 extern int              ip_rcv(struct sk_buff *skb, struct device *dev,
  76                                struct packet_type *pt);
  77 extern void             ip_queue_xmit(struct sock *sk,
  78                                       struct device *dev, struct sk_buff *skb,
  79                                       int free);
  80 extern void             ip_retransmit(struct sock *sk, int all);
  81 extern int              ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen);
  82 extern int              ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen);
  83 
  84 #endif  /* _IP_H */
/* */
root/net/inet/ip.h

INCLUDED FROM
