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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | /* * 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> * Alan Cox, <gw4pts@gw4pts.ampr.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/config.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/ip.h> #include <linux/netdevice.h> #ifndef _SNMP_H #include <net/snmp.h> #endif #include <net/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 */ #ifdef CONFIG_IP_MULTICAST extern void ip_mc_dropsocket(struct sock *); extern void ip_mc_dropdevice(struct device *dev); extern int ip_mc_procinfo(char *, char **, off_t, int, int); #endif /* 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(const 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 int ip_forward(struct sk_buff *skb, struct device *dev, int is_frag, unsigned long target_addr, int target_strict); extern void ip_send_check(struct iphdr *ip); extern int ip_id_count; extern void ip_queue_xmit(struct sock *sk, struct device *dev, struct sk_buff *skb, int free); 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); extern void ip_init(void); extern int ip_build_xmit(struct sock *sk, void getfrag (const void *, int, char *, unsigned int, unsigned int), const void *frag, unsigned short int length, int daddr, int flags, int type); extern struct ip_mib ip_statistics; #endif /* _IP_H */ |