85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
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/*
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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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*
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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/ip.h>
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#include "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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/* Describe an IP fragment. */
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struct ipfrag {
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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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/* Describe an entry in the "incomplete datagrams" queue. */
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struct ipq {
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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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extern int backoff(int n);
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extern void ip_print(struct iphdr *ip);
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extern int ip_ioctl(struct sock *sk, int cmd,
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unsigned long arg);
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extern void ip_route_check(unsigned long daddr);
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extern int ip_build_header(struct sk_buff *skb,
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unsigned long saddr,
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unsigned long 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);
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extern unsigned short ip_compute_csum(unsigned char * buff, int len);
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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 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_retransmit(struct sock *sk, int all);
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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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