cregit-Linux how code gets into the kernel

Release 4.12 include/net/dn_route.h

Directory: include/net
#ifndef _NET_DN_ROUTE_H

#define _NET_DN_ROUTE_H

    (c) 1995-1998 E.M. Serrat 
    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
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.

struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *,
			 struct sock *sk, int flags);
int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
void dn_rt_cache_flush(int delay);
int dn_route_rcv(struct sk_buff *skb, struct net_device *dev,
		 struct packet_type *pt, struct net_device *orig_dev);

/* Masks for flags field */

#define DN_RT_F_PID 0x07 
/* Mask for packet type                      */

#define DN_RT_F_PF  0x80 
/* Padding Follows                           */

#define DN_RT_F_VER 0x40 
/* Version =0 discard packet if ==1          */

#define DN_RT_F_IE  0x20 
/* Intra Ethernet, Reserved in short pkt     */

#define DN_RT_F_RTS 0x10 
/* Packet is being returned to sender        */

#define DN_RT_F_RQR 0x08 
/* Return packet to sender upon non-delivery */

/* Mask for types of routing packets */

#define DN_RT_PKT_MSK   0x06
/* Types of routing packets */

#define DN_RT_PKT_SHORT 0x02 
/* Short routing packet */

#define DN_RT_PKT_LONG  0x06 
/* Long routing packet  */

/* Mask for control/routing selection */

#define DN_RT_PKT_CNTL  0x01 
/* Set to 1 if a control packet  */
/* Types of control packets */

#define DN_RT_CNTL_MSK  0x0f 
/* Mask for control packets      */

#define DN_RT_PKT_INIT  0x01 
/* Initialisation packet         */

#define DN_RT_PKT_VERI  0x03 
/* Verification Message          */

#define DN_RT_PKT_HELO  0x05 
/* Hello and Test Message        */

#define DN_RT_PKT_L1RT  0x07 
/* Level 1 Routing Message       */

#define DN_RT_PKT_L2RT  0x09 
/* Level 2 Routing Message       */

#define DN_RT_PKT_ERTH  0x0b 
/* Ethernet Router Hello         */

#define DN_RT_PKT_EEDH  0x0d 
/* Ethernet EndNode Hello        */

/* Values for info field in hello message */

#define DN_RT_INFO_TYPE 0x03 
/* Type mask                     */

#define DN_RT_INFO_L1RT 0x02 
/* L1 Router                     */

#define DN_RT_INFO_L2RT 0x01 
/* L2 Router                     */

#define DN_RT_INFO_ENDN 0x03 
/* EndNode                       */

#define DN_RT_INFO_VERI 0x04 
/* Verification Reqd.            */

#define DN_RT_INFO_RJCT 0x08 
/* Reject Flag, Reserved         */

#define DN_RT_INFO_VFLD 0x10 
/* Verification Failed, Reserved */

#define DN_RT_INFO_NOML 0x20 
/* No Multicast traffic accepted */

#define DN_RT_INFO_BLKR 0x40 
/* Blocking Requested            */

 * The fl structure is what we used to look up the route.
 * The rt_saddr & rt_daddr entries are the same as key.saddr & key.daddr
 * except for local input routes, where the rt_saddr = fl.fld_dst and
 * rt_daddr = fl.fld_src to allow the route to be used for returning
 * packets to the originating host.

struct dn_route {
struct dst_entry dst;

struct neighbour *n;

struct flowidn fld;

__le16 rt_saddr;
__le16 rt_daddr;
__le16 rt_gateway;
__le16 rt_local_src;	/* Source used for forwarding packets */
__le16 rt_src_map;
__le16 rt_dst_map;

unsigned int rt_flags;
unsigned int rt_type;

static inline bool dn_is_input_route(struct dn_route *rt) { return rt->fld.flowidn_iif != 0; }


David S. Miller21100.00%2100.00%

static inline bool dn_is_output_route(struct dn_route *rt) { return rt->fld.flowidn_iif == 0; }


David S. Miller21100.00%2100.00%

void dn_route_init(void); void dn_route_cleanup(void); #include <net/sock.h> #include <linux/if_arp.h>
static inline void dn_rt_send(struct sk_buff *skb) { dev_queue_xmit(skb); }


Linus Torvalds (pre-git)17100.00%2100.00%

static inline void dn_rt_finish_output(struct sk_buff *skb, char *dst, char *src) { struct net_device *dev = skb->dev; if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK)) dst = NULL; if (dev_hard_header(skb, dev, ETH_P_DNA_RT, dst, src, skb->len) >= 0) dn_rt_send(skb); else kfree_skb(skb); }


Linus Torvalds (pre-git)7792.77%250.00%
Steven Whitehouse56.02%125.00%
Stephen Hemminger11.20%125.00%

#endif /* _NET_DN_ROUTE_H */

Overall Contributors

Linus Torvalds (pre-git)33375.51%423.53%
David S. Miller5011.34%317.65%
Steven Whitehouse276.12%423.53%
Rashika Kheria245.44%15.88%
Eric Dumazet40.91%211.76%
Américo Wang10.23%15.88%
Al Viro10.23%15.88%
Stephen Hemminger10.23%15.88%
Directory: include/net
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