Import of Linux 2.2.12 subset (ipv4 stack and related)

1 files changed, 251 insertions, 0 deletions

diff --git a/pfinet/linux-src/include/net/ip.h b/pfinet/linux-src/include/net/ip.h
new file mode 100644
index 00000000..5e80fb43
--- /dev/null
+++ b/pfinet/linux-src/include/net/ip.h
@@ -0,0 +1,251 @@
+/*
+ * 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>
+ *
+ * Changes:
+ *		Mike McLagan    :       Routing by source
+ *
+ *		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/types.h>
+#include <linux/socket.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/in_route.h>
+#include <net/route.h>
+#include <net/arp.h>
+
+#ifndef _SNMP_H
+#include <net/snmp.h>
+#endif
+
+#include <net/sock.h>	/* struct sock */
+
+struct inet_skb_parm
+{
+	struct ip_options	opt;		/* Compiled IP options		*/
+	u16			redirport;	/* Redirect port		*/
+	unsigned char		flags;
+
+#define IPSKB_MASQUERADED	1
+#define IPSKB_TRANSLATED	2
+#define IPSKB_FORWARDED		4
+};
+
+struct ipcm_cookie
+{
+	u32			addr;
+	int			oif;
+	struct ip_options	*opt;
+};
+
+#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
+
+struct ip_ra_chain
+{
+	struct ip_ra_chain	*next;
+	struct sock		*sk;
+	void			(*destructor)(struct sock *);
+};
+
+extern struct ip_ra_chain *ip_ra_chain;
+
+/* 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	*/
+
+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);
+
+/*
+ *	Functions provided by ip.c
+ */
+
+extern int		ip_ioctl(struct sock *sk, int cmd, unsigned long arg);
+extern void		ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
+					      u32 saddr, u32 daddr,
+					      struct ip_options *opt);
+extern int		ip_rcv(struct sk_buff *skb, struct device *dev,
+			       struct packet_type *pt);
+extern int		ip_local_deliver(struct sk_buff *skb);
+extern int		ip_mr_input(struct sk_buff *skb);
+extern int		ip_output(struct sk_buff *skb);
+extern int		ip_mc_output(struct sk_buff *skb);
+extern void		ip_fragment(struct sk_buff *skb, int (*out)(struct sk_buff*));
+extern int		ip_do_nat(struct sk_buff *skb);
+extern void		ip_send_check(struct iphdr *ip);
+extern int		ip_id_count;			  
+extern void		ip_queue_xmit(struct sk_buff *skb);
+extern void		ip_init(void);
+extern int		ip_build_xmit(struct sock *sk,
+				      int getfrag (const void *,
+						   char *,
+						   unsigned int,
+						   unsigned int),
+				      const void *frag,
+				      unsigned length,
+				      struct ipcm_cookie *ipc,
+				      struct rtable *rt,
+				      int flags);
+
+
+struct ip_reply_arg {
+	struct iovec iov[2];   
+	int          n_iov;    /* redundant */
+	u32 	     csum; 
+	int	     csumoffset; /* u16 offset of csum in iov[0].iov_base */
+				 /* -1 if not needed */ 
+}; 
+
+void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg,
+		   unsigned int len); 
+
+extern int __ip_finish_output(struct sk_buff *skb);
+
+struct ipv4_config
+{
+	int	log_martians;
+	int	autoconfig;
+	int	no_pmtu_disc;
+};
+
+extern struct ipv4_config ipv4_config;
+extern struct ip_mib	ip_statistics;
+extern struct linux_mib	net_statistics;
+
+extern int sysctl_local_port_range[2];
+
+extern __inline__ int ip_finish_output(struct sk_buff *skb)
+{
+	struct dst_entry *dst = skb->dst;
+	struct device *dev = dst->dev;
+	struct hh_cache *hh = dst->hh;
+
+	skb->dev = dev;
+	skb->protocol = __constant_htons(ETH_P_IP);
+
+	if (hh) {
+		read_lock_irq(&hh->hh_lock);
+		memcpy(skb->data - 16, hh->hh_data, 16);
+		read_unlock_irq(&hh->hh_lock);
+	        skb_push(skb, dev->hard_header_len);
+		return hh->hh_output(skb);
+	} else if (dst->neighbour)
+		return dst->neighbour->output(skb);
+
+	kfree_skb(skb);
+	return -EINVAL;
+}
+
+extern __inline__ void ip_send(struct sk_buff *skb)
+{
+	if (skb->len > skb->dst->pmtu)
+		ip_fragment(skb, __ip_finish_output);
+	else
+		ip_finish_output(skb);
+}
+
+extern __inline__
+int ip_decrease_ttl(struct iphdr *iph)
+{
+	u16 check = iph->check;
+	check = ntohs(check) + 0x0100;
+	if ((check & 0xFF00) == 0)
+		check++;		/* carry overflow */
+	iph->check = htons(check);
+	return --iph->ttl;
+}
+
+extern __inline__
+int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
+{
+	return (sk->ip_pmtudisc == IP_PMTUDISC_DO ||
+		(sk->ip_pmtudisc == IP_PMTUDISC_WANT &&
+		 !(dst->mxlock&(1<<RTAX_MTU))));
+}
+
+/*
+ *	Map a multicast IP onto multicast MAC for type ethernet.
+ */
+
+extern __inline__ void ip_eth_mc_map(u32 addr, char *buf)
+{
+	addr=ntohl(addr);
+	buf[0]=0x01;
+	buf[1]=0x00;
+	buf[2]=0x5e;
+	buf[5]=addr&0xFF;
+	addr>>=8;
+	buf[4]=addr&0xFF;
+	addr>>=8;
+	buf[3]=addr&0x7F;
+}
+
+
+extern int	ip_call_ra_chain(struct sk_buff *skb);
+
+/*
+ *	Functions provided by ip_fragment.o
+ */
+ 
+struct sk_buff *ip_defrag(struct sk_buff *skb);
+
+/*
+ *	Functions provided by ip_forward.c
+ */
+ 
+extern int ip_forward(struct sk_buff *skb);
+extern int ip_net_unreachable(struct sk_buff *skb);
+ 
+/*
+ *	Functions provided by ip_options.c
+ */
+ 
+extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt, u32 daddr, struct rtable *rt, int is_frag);
+extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb);
+extern void ip_options_fragment(struct sk_buff *skb);
+extern int ip_options_compile(struct ip_options *opt, struct sk_buff *skb);
+extern int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen, int user);
+extern void ip_options_undo(struct ip_options * opt);
+extern void ip_forward_options(struct sk_buff *skb);
+extern int ip_options_rcv_srr(struct sk_buff *skb);
+
+/*
+ *	Functions provided by ip_sockglue.c
+ */
+
+extern void	ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
+extern int	ip_cmsg_send(struct msghdr *msg, struct ipcm_cookie *ipc);
+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 int	ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *));
+
+extern int 	ip_recv_error(struct sock *sk, struct msghdr *msg, int len);
+extern void	ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, 
+			      u16 port, u32 info, u8 *payload);
+extern void	ip_local_error(struct sock *sk, int err, u32 daddr, u16 dport,
+			       u32 info);
+
+#endif	/* _IP_H */