/* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for the IP module. * * Version: @(#)ip.h 1.0.2 05/07/93 * * Authors: Ross Biro, <bir7@leland.Stanford.Edu> * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _IP_H #define _IP_H #include <linux/ip.h> #include "sock.h" /* struct sock */ /* IP flags. */ #define IP_CE 0x8000 /* Flag: "Congestion" */ #define IP_DF 0x4000 /* Flag: "Don't Fragment" */ #define IP_MF 0x2000 /* Flag: "More Fragments" */ #define IP_OFFSET 0x1FFF /* "Fragment Offset" part */ #define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */ /* Describe an IP fragment. */ struct ipfrag { int offset; /* offset of fragment in IP datagram */ int end; /* last byte of data in datagram */ int len; /* length of this fragment */ struct sk_buff *skb; /* complete received fragment */ unsigned char *ptr; /* pointer into real fragment data */ struct ipfrag *next; /* linked list pointers */ struct ipfrag *prev; }; /* Describe an entry in the "incomplete datagrams" queue. */ struct ipq { unsigned char *mac; /* pointer to MAC header */ struct iphdr *iph; /* pointer to IP header */ int len; /* total length of original datagram */ short ihlen; /* length of the IP header */ short maclen; /* length of the MAC header */ struct timer_list timer; /* when will this queue expire? */ struct ipfrag *fragments; /* linked list of received fragments */ struct ipq *next; /* linked list pointers */ struct ipq *prev; struct device *dev; /* Device - for icmp replies */ }; extern int backoff(int n); extern void ip_print(struct iphdr *ip); extern int ip_ioctl(struct sock *sk, int cmd, unsigned long arg); extern void ip_route_check(unsigned long daddr); extern int ip_build_header(struct sk_buff *skb, unsigned long saddr, unsigned long daddr, struct device **dev, int type, struct options *opt, int len, int tos,int ttl); extern unsigned short ip_compute_csum(unsigned char * buff, int len); extern int ip_rcv(struct sk_buff *skb, struct device *dev, struct packet_type *pt); extern void ip_queue_xmit(struct sock *sk, struct device *dev, struct sk_buff *skb, int free); extern void ip_retransmit(struct sock *sk, int all); extern int ip_setsockopt(struct sock *sk, int level, int optname, char *optval, int optlen); extern int ip_getsockopt(struct sock *sk, int level, int optname, char *optval, int *optlen); #endif /* _IP_H */