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jcastillo |
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the IP module.
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*
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* Version: @(#)ip.h 1.0.2 05/07/93
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*
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* Authors: Ross Biro, <bir7@leland.Stanford.Edu>
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Alan Cox, <gw4pts@gw4pts.ampr.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _IP_H
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#define _IP_H
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/ip.h>
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#include <linux/netdevice.h>
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#include <net/route.h>
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#ifndef _SNMP_H
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#include <net/snmp.h>
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#endif
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#include <net/sock.h> /* struct sock */
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/* IP flags. */
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#define IP_CE 0x8000 /* Flag: "Congestion" */
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#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
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#define IP_MF 0x2000 /* Flag: "More Fragments" */
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#define IP_OFFSET 0x1FFF /* "Fragment Offset" part */
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#define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */
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#ifdef CONFIG_IP_MULTICAST
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extern void ip_mc_dropsocket(struct sock *);
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extern void ip_mc_dropdevice(struct device *dev);
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extern int ip_mc_procinfo(char *, char **, off_t, int, int);
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#endif
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#include <net/ip_forward.h>
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/* Describe an IP fragment. */
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struct ipfrag
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{
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int offset; /* offset of fragment in IP datagram */
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int end; /* last byte of data in datagram */
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int len; /* length of this fragment */
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struct sk_buff *skb; /* complete received fragment */
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unsigned char *ptr; /* pointer into real fragment data */
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struct ipfrag *next; /* linked list pointers */
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struct ipfrag *prev;
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};
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/*
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* Describe an entry in the "incomplete datagrams" queue.
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*/
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struct ipq
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{
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unsigned char *mac; /* pointer to MAC header */
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struct iphdr *iph; /* pointer to IP header */
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int len; /* total length of original datagram */
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short ihlen; /* length of the IP header */
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short maclen; /* length of the MAC header */
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struct timer_list timer; /* when will this queue expire? */
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struct ipfrag *fragments; /* linked list of received fragments */
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struct ipq *next; /* linked list pointers */
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struct ipq *prev;
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struct device *dev; /* Device - for icmp replies */
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};
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/*
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* Functions provided by ip.c
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*/
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extern void ip_print(const struct iphdr *ip);
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extern int ip_ioctl(struct sock *sk, int cmd, unsigned long arg);
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extern void ip_route_check(__u32 daddr);
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extern int ip_send(struct rtable *rt, struct sk_buff *skb, __u32 daddr, int len, struct device *dev, __u32 saddr);
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extern int ip_build_header(struct sk_buff *skb,
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__u32 saddr,
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__u32 daddr,
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struct device **dev, int type,
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struct options *opt, int len,
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int tos,int ttl,struct rtable **rp);
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extern int ip_rcv(struct sk_buff *skb, struct device *dev,
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struct packet_type *pt);
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extern int ip_options_echo(struct options * dopt, struct options * sopt,
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__u32 daddr, __u32 saddr,
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struct sk_buff * skb);
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extern int ip_options_compile(struct options * opt, struct sk_buff * skb);
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extern void ip_send_check(struct iphdr *ip);
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extern int ip_id_count;
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extern void ip_queue_xmit(struct sock *sk,
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struct device *dev, struct sk_buff *skb,
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int free);
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extern void ip_init(void);
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extern int ip_build_xmit(struct sock *sk,
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void getfrag (const void *,
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__u32,
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char *,
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unsigned int,
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unsigned int),
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const void *frag,
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unsigned short int length,
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__u32 daddr,
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__u32 saddr,
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struct options * opt,
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int flags,
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int type,
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int noblock);
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extern struct ip_mib ip_statistics;
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extern int sysctl_ip_dynaddr;
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int ip_rewrite_addrs(struct sock *sk, struct sk_buff *skb, struct device *dev);
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/*
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* Functions provided by ip_fragment.o
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*/
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struct sk_buff *ip_defrag(struct iphdr *iph, struct sk_buff *skb, struct device *dev);
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void ip_fragment(struct sock *sk, struct sk_buff *skb, struct device *dev, int is_frag);
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/*
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* Functions provided by ip_forward.c
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*/
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extern int ip_forward(struct sk_buff *skb, struct device *dev, int is_frag, __u32 target_addr);
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extern int sysctl_ip_forward;
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/*
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* Functions provided by ip_options.c
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*/
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extern void ip_options_build(struct sk_buff *skb, struct options *opt, __u32 daddr, __u32 saddr, int is_frag);
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extern int ip_options_echo(struct options *dopt, struct options *sopt, __u32 daddr, __u32 saddr, struct sk_buff *skb);
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extern void ip_options_fragment(struct sk_buff *skb);
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extern int ip_options_compile(struct options *opt, struct sk_buff *skb);
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/*
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* Functions provided by ip_sockglue.c
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*/
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extern int ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen);
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extern int ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen);
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#endif /* _IP_H */
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