Release 4.7 net/decnet/netfilter/dn_rtmsg.c
/*
* DECnet An implementation of the DECnet protocol suite for the LINUX
* operating system. DECnet is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* DECnet Routing Message Grabulator
*
* (C) 2000 ChyGwyn Limited - http://www.chygwyn.com/
* This code may be copied under the GPL v.2 or at your option
* any later version.
*
* Author: Steven Whitehouse <steve@chygwyn.com>
*
*/
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/netfilter.h>
#include <linux/spinlock.h>
#include <net/netlink.h>
#include <linux/netfilter_decnet.h>
#include <net/sock.h>
#include <net/flow.h>
#include <net/dn.h>
#include <net/dn_route.h>
static struct sock *dnrmg = NULL;
static struct sk_buff *dnrmg_build_message(struct sk_buff *rt_skb, int *errp)
{
struct sk_buff *skb = NULL;
size_t size;
sk_buff_data_t old_tail;
struct nlmsghdr *nlh;
unsigned char *ptr;
struct nf_dn_rtmsg *rtm;
size = NLMSG_ALIGN(rt_skb->len) +
NLMSG_ALIGN(sizeof(struct nf_dn_rtmsg));
skb = nlmsg_new(size, GFP_ATOMIC);
if (!skb) {
*errp = -ENOMEM;
return NULL;
}
old_tail = skb->tail;
nlh = nlmsg_put(skb, 0, 0, 0, size, 0);
if (!nlh) {
kfree_skb(skb);
*errp = -ENOMEM;
return NULL;
}
rtm = (struct nf_dn_rtmsg *)nlmsg_data(nlh);
rtm->nfdn_ifindex = rt_skb->dev->ifindex;
ptr = NFDN_RTMSG(rtm);
skb_copy_from_linear_data(rt_skb, ptr, rt_skb->len);
nlh->nlmsg_len = skb->tail - old_tail;
return skb;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 142 | 76.76% | 1 | 20.00% |
| david s. miller | david s. miller | 35 | 18.92% | 1 | 20.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 4 | 2.16% | 2 | 40.00% |
| hong zhi guo | hong zhi guo | 4 | 2.16% | 1 | 20.00% |
| Total | 185 | 100.00% | 5 | 100.00% |
static void dnrmg_send_peer(struct sk_buff *skb)
{
struct sk_buff *skb2;
int status = 0;
int group = 0;
unsigned char flags = *skb->data;
switch (flags & DN_RT_CNTL_MSK) {
case DN_RT_PKT_L1RT:
group = DNRNG_NLGRP_L1;
break;
case DN_RT_PKT_L2RT:
group = DNRNG_NLGRP_L2;
break;
default:
return;
}
skb2 = dnrmg_build_message(skb, &status);
if (skb2 == NULL)
return;
NETLINK_CB(skb2).dst_group = group;
netlink_broadcast(dnrmg, skb2, 0, group, GFP_ATOMIC);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 97 | 97.00% | 1 | 33.33% |
| andrew morton | andrew morton | 2 | 2.00% | 1 | 33.33% |
| patrick mchardy | patrick mchardy | 1 | 1.00% | 1 | 33.33% |
| Total | 100 | 100.00% | 3 | 100.00% |
static unsigned int dnrmg_hook(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
dnrmg_send_peer(skb);
return NF_ACCEPT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 23 | 76.67% | 1 | 20.00% |
| eric w. biederman | eric w. biederman | 2 | 6.67% | 1 | 20.00% |
| herbert xu | herbert xu | 2 | 6.67% | 1 | 20.00% |
| david s. miller | david s. miller | 2 | 6.67% | 1 | 20.00% |
| patrick mchardy | patrick mchardy | 1 | 3.33% | 1 | 20.00% |
| Total | 30 | 100.00% | 5 | 100.00% |
#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
static inline void dnrmg_receive_user_skb(struct sk_buff *skb)
{
struct nlmsghdr *nlh = nlmsg_hdr(skb);
if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
return;
if (!netlink_capable(skb, CAP_NET_ADMIN))
RCV_SKB_FAIL(-EPERM);
/* Eventually we might send routing messages too */
RCV_SKB_FAIL(-EINVAL);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 59 | 89.39% | 1 | 25.00% |
| eric w. biederman | eric w. biederman | 3 | 4.55% | 1 | 25.00% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 3 | 4.55% | 1 | 25.00% |
| eric paris | eric paris | 1 | 1.52% | 1 | 25.00% |
| Total | 66 | 100.00% | 4 | 100.00% |
static struct nf_hook_ops dnrmg_ops __read_mostly = {
.hook = dnrmg_hook,
.pf = NFPROTO_DECNET,
.hooknum = NF_DN_ROUTE,
.priority = NF_DN_PRI_DNRTMSG,
};
static int __init dn_rtmsg_init(void)
{
int rv = 0;
struct netlink_kernel_cfg cfg = {
.groups = DNRNG_NLGRP_MAX,
.input = dnrmg_receive_user_skb,
};
dnrmg = netlink_kernel_create(&init_net, NETLINK_DNRTMSG, &cfg);
if (dnrmg == NULL) {
printk(KERN_ERR "dn_rtmsg: Cannot create netlink socket");
return -ENOMEM;
}
rv = nf_register_hook(&dnrmg_ops);
if (rv) {
netlink_kernel_release(dnrmg);
}
return rv;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 60 | 72.29% | 1 | 20.00% |
| pablo neira ayuso | pablo neira ayuso | 18 | 21.69% | 1 | 20.00% |
| eric w. biederman | eric w. biederman | 3 | 3.61% | 1 | 20.00% |
| denis v. lunev | denis v. lunev | 1 | 1.20% | 1 | 20.00% |
| andrew morton | andrew morton | 1 | 1.20% | 1 | 20.00% |
| Total | 83 | 100.00% | 5 | 100.00% |
static void __exit dn_rtmsg_fini(void)
{
nf_unregister_hook(&dnrmg_ops);
netlink_kernel_release(dnrmg);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 18 | 90.00% | 1 | 33.33% |
| andrew morton | andrew morton | 1 | 5.00% | 1 | 33.33% |
| denis v. lunev | denis v. lunev | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
MODULE_DESCRIPTION("DECnet Routing Message Grabulator");
MODULE_AUTHOR("Steven Whitehouse <steve@chygwyn.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_DNRTMSG);
module_init(dn_rtmsg_init);
module_exit(dn_rtmsg_fini);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| steven whitehouse | steven whitehouse | 496 | 82.80% | 1 | 4.55% |
| david s. miller | david s. miller | 37 | 6.18% | 2 | 9.09% |
| pablo neira ayuso | pablo neira ayuso | 18 | 3.01% | 1 | 4.55% |
| andrew morton | andrew morton | 9 | 1.50% | 2 | 9.09% |
| eric w. biederman | eric w. biederman | 8 | 1.34% | 3 | 13.64% |
| arnaldo carvalho de melo | arnaldo carvalho de melo | 7 | 1.17% | 3 | 13.64% |
| harald welte | harald welte | 7 | 1.17% | 1 | 4.55% |
| hong zhi guo | hong zhi guo | 5 | 0.83% | 1 | 4.55% |
| patrick mchardy | patrick mchardy | 3 | 0.50% | 3 | 13.64% |
| tejun heo | tejun heo | 3 | 0.50% | 1 | 4.55% |
| herbert xu | herbert xu | 2 | 0.33% | 1 | 4.55% |
| denis v. lunev | denis v. lunev | 2 | 0.33% | 1 | 4.55% |
| eric paris | eric paris | 1 | 0.17% | 1 | 4.55% |
| alban crequy | alban crequy | 1 | 0.17% | 1 | 4.55% |
| Total | 599 | 100.00% | 22 | 100.00% |
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