1/*
2 * INET		An implementation of the TCP/IP protocol suite for the LINUX
3 *		operating system.  INET is implemented using the  BSD Socket
4 *		interface as the means of communication with the user level.
5 *
6 *		This file implements the various access functions for the
7 *		PROC file system.  This is very similar to the IPv4 version,
8 *		except it reports the sockets in the INET6 address family.
9 *
10 * Authors:	David S. Miller (davem@caip.rutgers.edu)
11 * 		YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
12 *
13 *		This program is free software; you can redistribute it and/or
14 *		modify it under the terms of the GNU General Public License
15 *		as published by the Free Software Foundation; either version
16 *		2 of the License, or (at your option) any later version.
17 */
18#include <linux/socket.h>
19#include <linux/net.h>
20#include <linux/ipv6.h>
21#include <linux/proc_fs.h>
22#include <linux/seq_file.h>
23#include <linux/stddef.h>
24#include <net/net_namespace.h>
25#include <net/ip.h>
26#include <net/sock.h>
27#include <net/tcp.h>
28#include <net/udp.h>
29#include <net/transp_v6.h>
30#include <net/ipv6.h>
31
32static int sockstat6_seq_show(struct seq_file *seq, void *v)
33{
34	struct net *net = seq->private;
35
36	seq_printf(seq, "TCP6: inuse %d\n",
37		       sock_prot_inuse_get(net, &tcpv6_prot));
38	seq_printf(seq, "UDP6: inuse %d\n",
39		       sock_prot_inuse_get(net, &udpv6_prot));
40	seq_printf(seq, "UDPLITE6: inuse %d\n",
41			sock_prot_inuse_get(net, &udplitev6_prot));
42	seq_printf(seq, "RAW6: inuse %d\n",
43		       sock_prot_inuse_get(net, &rawv6_prot));
44	seq_printf(seq, "FRAG6: inuse %d memory %d\n",
45		       ip6_frag_nqueues(net), ip6_frag_mem(net));
46	return 0;
47}
48
49static int sockstat6_seq_open(struct inode *inode, struct file *file)
50{
51	return single_open_net(inode, file, sockstat6_seq_show);
52}
53
54static const struct file_operations sockstat6_seq_fops = {
55	.owner	 = THIS_MODULE,
56	.open	 = sockstat6_seq_open,
57	.read	 = seq_read,
58	.llseek	 = seq_lseek,
59	.release = single_release_net,
60};
61
62static const struct snmp_mib snmp6_ipstats_list[] = {
63/* ipv6 mib according to RFC 2465 */
64	SNMP_MIB_ITEM("Ip6InReceives", IPSTATS_MIB_INPKTS),
65	SNMP_MIB_ITEM("Ip6InHdrErrors", IPSTATS_MIB_INHDRERRORS),
66	SNMP_MIB_ITEM("Ip6InTooBigErrors", IPSTATS_MIB_INTOOBIGERRORS),
67	SNMP_MIB_ITEM("Ip6InNoRoutes", IPSTATS_MIB_INNOROUTES),
68	SNMP_MIB_ITEM("Ip6InAddrErrors", IPSTATS_MIB_INADDRERRORS),
69	SNMP_MIB_ITEM("Ip6InUnknownProtos", IPSTATS_MIB_INUNKNOWNPROTOS),
70	SNMP_MIB_ITEM("Ip6InTruncatedPkts", IPSTATS_MIB_INTRUNCATEDPKTS),
71	SNMP_MIB_ITEM("Ip6InDiscards", IPSTATS_MIB_INDISCARDS),
72	SNMP_MIB_ITEM("Ip6InDelivers", IPSTATS_MIB_INDELIVERS),
73	SNMP_MIB_ITEM("Ip6OutForwDatagrams", IPSTATS_MIB_OUTFORWDATAGRAMS),
74	SNMP_MIB_ITEM("Ip6OutRequests", IPSTATS_MIB_OUTPKTS),
75	SNMP_MIB_ITEM("Ip6OutDiscards", IPSTATS_MIB_OUTDISCARDS),
76	SNMP_MIB_ITEM("Ip6OutNoRoutes", IPSTATS_MIB_OUTNOROUTES),
77	SNMP_MIB_ITEM("Ip6ReasmTimeout", IPSTATS_MIB_REASMTIMEOUT),
78	SNMP_MIB_ITEM("Ip6ReasmReqds", IPSTATS_MIB_REASMREQDS),
79	SNMP_MIB_ITEM("Ip6ReasmOKs", IPSTATS_MIB_REASMOKS),
80	SNMP_MIB_ITEM("Ip6ReasmFails", IPSTATS_MIB_REASMFAILS),
81	SNMP_MIB_ITEM("Ip6FragOKs", IPSTATS_MIB_FRAGOKS),
82	SNMP_MIB_ITEM("Ip6FragFails", IPSTATS_MIB_FRAGFAILS),
83	SNMP_MIB_ITEM("Ip6FragCreates", IPSTATS_MIB_FRAGCREATES),
84	SNMP_MIB_ITEM("Ip6InMcastPkts", IPSTATS_MIB_INMCASTPKTS),
85	SNMP_MIB_ITEM("Ip6OutMcastPkts", IPSTATS_MIB_OUTMCASTPKTS),
86	SNMP_MIB_ITEM("Ip6InOctets", IPSTATS_MIB_INOCTETS),
87	SNMP_MIB_ITEM("Ip6OutOctets", IPSTATS_MIB_OUTOCTETS),
88	SNMP_MIB_ITEM("Ip6InMcastOctets", IPSTATS_MIB_INMCASTOCTETS),
89	SNMP_MIB_ITEM("Ip6OutMcastOctets", IPSTATS_MIB_OUTMCASTOCTETS),
90	SNMP_MIB_ITEM("Ip6InBcastOctets", IPSTATS_MIB_INBCASTOCTETS),
91	SNMP_MIB_ITEM("Ip6OutBcastOctets", IPSTATS_MIB_OUTBCASTOCTETS),
92	SNMP_MIB_SENTINEL
93};
94
95static const struct snmp_mib snmp6_icmp6_list[] = {
96/* icmpv6 mib according to RFC 2466 */
97	SNMP_MIB_ITEM("Icmp6InMsgs", ICMP6_MIB_INMSGS),
98	SNMP_MIB_ITEM("Icmp6InErrors", ICMP6_MIB_INERRORS),
99	SNMP_MIB_ITEM("Icmp6OutMsgs", ICMP6_MIB_OUTMSGS),
100	SNMP_MIB_ITEM("Icmp6OutErrors", ICMP6_MIB_OUTERRORS),
101	SNMP_MIB_SENTINEL
102};
103
104/* RFC 4293 v6 ICMPMsgStatsTable; named items for RFC 2466 compatibility */
105static const char *const icmp6type2name[256] = {
106	[ICMPV6_DEST_UNREACH] = "DestUnreachs",
107	[ICMPV6_PKT_TOOBIG] = "PktTooBigs",
108	[ICMPV6_TIME_EXCEED] = "TimeExcds",
109	[ICMPV6_PARAMPROB] = "ParmProblems",
110	[ICMPV6_ECHO_REQUEST] = "Echos",
111	[ICMPV6_ECHO_REPLY] = "EchoReplies",
112	[ICMPV6_MGM_QUERY] = "GroupMembQueries",
113	[ICMPV6_MGM_REPORT] = "GroupMembResponses",
114	[ICMPV6_MGM_REDUCTION] = "GroupMembReductions",
115	[ICMPV6_MLD2_REPORT] = "MLDv2Reports",
116	[NDISC_ROUTER_ADVERTISEMENT] = "RouterAdvertisements",
117	[NDISC_ROUTER_SOLICITATION] = "RouterSolicits",
118	[NDISC_NEIGHBOUR_ADVERTISEMENT] = "NeighborAdvertisements",
119	[NDISC_NEIGHBOUR_SOLICITATION] = "NeighborSolicits",
120	[NDISC_REDIRECT] = "Redirects",
121};
122
123
124static const struct snmp_mib snmp6_udp6_list[] = {
125	SNMP_MIB_ITEM("Udp6InDatagrams", UDP_MIB_INDATAGRAMS),
126	SNMP_MIB_ITEM("Udp6NoPorts", UDP_MIB_NOPORTS),
127	SNMP_MIB_ITEM("Udp6InErrors", UDP_MIB_INERRORS),
128	SNMP_MIB_ITEM("Udp6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
129	SNMP_MIB_SENTINEL
130};
131
132static const struct snmp_mib snmp6_udplite6_list[] = {
133	SNMP_MIB_ITEM("UdpLite6InDatagrams", UDP_MIB_INDATAGRAMS),
134	SNMP_MIB_ITEM("UdpLite6NoPorts", UDP_MIB_NOPORTS),
135	SNMP_MIB_ITEM("UdpLite6InErrors", UDP_MIB_INERRORS),
136	SNMP_MIB_ITEM("UdpLite6OutDatagrams", UDP_MIB_OUTDATAGRAMS),
137	SNMP_MIB_SENTINEL
138};
139
140static void snmp6_seq_show_icmpv6msg(struct seq_file *seq, void __percpu **mib)
141{
142	char name[32];
143	int i;
144
145	/* print by name -- deprecated items */
146	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
147		int icmptype;
148		const char *p;
149
150		icmptype = i & 0xff;
151		p = icmp6type2name[icmptype];
152		if (!p)	/* don't print un-named types here */
153			continue;
154		snprintf(name, sizeof(name), "Icmp6%s%s",
155			i & 0x100 ? "Out" : "In", p);
156		seq_printf(seq, "%-32s\t%lu\n", name,
157			snmp_fold_field(mib, i));
158	}
159
160	/* print by number (nonzero only) - ICMPMsgStat format */
161	for (i = 0; i < ICMP6MSG_MIB_MAX; i++) {
162		unsigned long val;
163
164		val = snmp_fold_field(mib, i);
165		if (!val)
166			continue;
167		snprintf(name, sizeof(name), "Icmp6%sType%u",
168			i & 0x100 ?  "Out" : "In", i & 0xff);
169		seq_printf(seq, "%-32s\t%lu\n", name, val);
170	}
171}
172
173static void snmp6_seq_show_item(struct seq_file *seq, void __percpu **mib,
174				const struct snmp_mib *itemlist)
175{
176	int i;
177
178	for (i = 0; itemlist[i].name; i++)
179		seq_printf(seq, "%-32s\t%lu\n", itemlist[i].name,
180			   snmp_fold_field(mib, itemlist[i].entry));
181}
182
183static void snmp6_seq_show_item64(struct seq_file *seq, void __percpu **mib,
184				  const struct snmp_mib *itemlist, size_t syncpoff)
185{
186	int i;
187
188	for (i = 0; itemlist[i].name; i++)
189		seq_printf(seq, "%-32s\t%llu\n", itemlist[i].name,
190			   snmp_fold_field64(mib, itemlist[i].entry, syncpoff));
191}
192
193static int snmp6_seq_show(struct seq_file *seq, void *v)
194{
195	struct net *net = (struct net *)seq->private;
196
197	snmp6_seq_show_item64(seq, (void __percpu **)net->mib.ipv6_statistics,
198			    snmp6_ipstats_list, offsetof(struct ipstats_mib, syncp));
199	snmp6_seq_show_item(seq, (void __percpu **)net->mib.icmpv6_statistics,
200			    snmp6_icmp6_list);
201	snmp6_seq_show_icmpv6msg(seq,
202			    (void __percpu **)net->mib.icmpv6msg_statistics);
203	snmp6_seq_show_item(seq, (void __percpu **)net->mib.udp_stats_in6,
204			    snmp6_udp6_list);
205	snmp6_seq_show_item(seq, (void __percpu **)net->mib.udplite_stats_in6,
206			    snmp6_udplite6_list);
207	return 0;
208}
209
210static int snmp6_seq_open(struct inode *inode, struct file *file)
211{
212	return single_open_net(inode, file, snmp6_seq_show);
213}
214
215static const struct file_operations snmp6_seq_fops = {
216	.owner	 = THIS_MODULE,
217	.open	 = snmp6_seq_open,
218	.read	 = seq_read,
219	.llseek	 = seq_lseek,
220	.release = single_release_net,
221};
222
223static int snmp6_dev_seq_show(struct seq_file *seq, void *v)
224{
225	struct inet6_dev *idev = (struct inet6_dev *)seq->private;
226
227	seq_printf(seq, "%-32s\t%u\n", "ifIndex", idev->dev->ifindex);
228	snmp6_seq_show_item(seq, (void __percpu **)idev->stats.ipv6,
229			    snmp6_ipstats_list);
230	snmp6_seq_show_item(seq, (void __percpu **)idev->stats.icmpv6,
231			    snmp6_icmp6_list);
232	snmp6_seq_show_icmpv6msg(seq, (void __percpu **)idev->stats.icmpv6msg);
233	return 0;
234}
235
236static int snmp6_dev_seq_open(struct inode *inode, struct file *file)
237{
238	return single_open(file, snmp6_dev_seq_show, PDE(inode)->data);
239}
240
241static const struct file_operations snmp6_dev_seq_fops = {
242	.owner	 = THIS_MODULE,
243	.open	 = snmp6_dev_seq_open,
244	.read	 = seq_read,
245	.llseek	 = seq_lseek,
246	.release = single_release,
247};
248
249int snmp6_register_dev(struct inet6_dev *idev)
250{
251	struct proc_dir_entry *p;
252	struct net *net;
253
254	if (!idev || !idev->dev)
255		return -EINVAL;
256
257	net = dev_net(idev->dev);
258	if (!net->mib.proc_net_devsnmp6)
259		return -ENOENT;
260
261	p = proc_create_data(idev->dev->name, S_IRUGO,
262			     net->mib.proc_net_devsnmp6,
263			     &snmp6_dev_seq_fops, idev);
264	if (!p)
265		return -ENOMEM;
266
267	idev->stats.proc_dir_entry = p;
268	return 0;
269}
270
271int snmp6_unregister_dev(struct inet6_dev *idev)
272{
273	struct net *net = dev_net(idev->dev);
274	if (!net->mib.proc_net_devsnmp6)
275		return -ENOENT;
276	if (!idev->stats.proc_dir_entry)
277		return -EINVAL;
278	remove_proc_entry(idev->stats.proc_dir_entry->name,
279			  net->mib.proc_net_devsnmp6);
280	idev->stats.proc_dir_entry = NULL;
281	return 0;
282}
283
284static int __net_init ipv6_proc_init_net(struct net *net)
285{
286	if (!proc_net_fops_create(net, "sockstat6", S_IRUGO,
287			&sockstat6_seq_fops))
288		return -ENOMEM;
289
290	if (!proc_net_fops_create(net, "snmp6", S_IRUGO, &snmp6_seq_fops))
291		goto proc_snmp6_fail;
292
293	net->mib.proc_net_devsnmp6 = proc_mkdir("dev_snmp6", net->proc_net);
294	if (!net->mib.proc_net_devsnmp6)
295		goto proc_dev_snmp6_fail;
296	return 0;
297
298proc_snmp6_fail:
299	proc_net_remove(net, "sockstat6");
300proc_dev_snmp6_fail:
301	proc_net_remove(net, "dev_snmp6");
302	return -ENOMEM;
303}
304
305static void __net_exit ipv6_proc_exit_net(struct net *net)
306{
307	proc_net_remove(net, "sockstat6");
308	proc_net_remove(net, "dev_snmp6");
309	proc_net_remove(net, "snmp6");
310}
311
312static struct pernet_operations ipv6_proc_ops = {
313	.init = ipv6_proc_init_net,
314	.exit = ipv6_proc_exit_net,
315};
316
317int __init ipv6_misc_proc_init(void)
318{
319	return register_pernet_subsys(&ipv6_proc_ops);
320}
321
322void ipv6_misc_proc_exit(void)
323{
324	unregister_pernet_subsys(&ipv6_proc_ops);
325}
326