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Diffstat (limited to 'linux/src/include/net/ip.h')
| -rw-r--r-- | linux/src/include/net/ip.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/linux/src/include/net/ip.h b/linux/src/include/net/ip.h new file mode 100644 index 0000000..5437b3d --- /dev/null +++ b/linux/src/include/net/ip.h @@ -0,0 +1,159 @@ +/* + * 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> +#include <net/route.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 + +#include <net/ip_forward.h> + +/* 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 */ +}; + +/* + * Functions provided by ip.c + */ + +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(__u32 daddr); +extern int ip_send(struct rtable *rt, struct sk_buff *skb, __u32 daddr, int len, struct device *dev, __u32 saddr); +extern int ip_build_header(struct sk_buff *skb, + __u32 saddr, + __u32 daddr, + struct device **dev, int type, + struct options *opt, int len, + int tos,int ttl,struct rtable **rp); +extern int ip_rcv(struct sk_buff *skb, struct device *dev, + struct packet_type *pt); +extern int ip_options_echo(struct options * dopt, struct options * sopt, + __u32 daddr, __u32 saddr, + struct sk_buff * skb); +extern int ip_options_compile(struct options * opt, struct sk_buff * skb); +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 void ip_init(void); +extern int ip_build_xmit(struct sock *sk, + void getfrag (const void *, + __u32, + char *, + unsigned int, + unsigned int), + const void *frag, + unsigned short int length, + __u32 daddr, + __u32 saddr, + struct options * opt, + int flags, + int type, + int noblock); + +extern struct ip_mib ip_statistics; + +extern int sysctl_ip_dynaddr; +int ip_rewrite_addrs(struct sock *sk, struct sk_buff *skb, struct device *dev); + +/* + * Functions provided by ip_fragment.o + */ + +struct sk_buff *ip_defrag(struct iphdr *iph, struct sk_buff *skb, struct device *dev); +void ip_fragment(struct sock *sk, struct sk_buff *skb, struct device *dev, int is_frag); + +/* + * Functions provided by ip_forward.c + */ + +extern int ip_forward(struct sk_buff *skb, struct device *dev, int is_frag, __u32 target_addr); +extern int sysctl_ip_forward; + + +/* + * Functions provided by ip_options.c + */ + +extern void ip_options_build(struct sk_buff *skb, struct options *opt, __u32 daddr, __u32 saddr, int is_frag); +extern int ip_options_echo(struct options *dopt, struct options *sopt, __u32 daddr, __u32 saddr, struct sk_buff *skb); +extern void ip_options_fragment(struct sk_buff *skb); +extern int ip_options_compile(struct options *opt, struct sk_buff *skb); + +/* + * Functions provided by ip_sockglue.c + */ + +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 */ |