Release 4.8 net/ipv6/netfilter/ip6_tables.c
/*
* Packet matching code.
*
* Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
* Copyright (C) 2000-2005 Netfilter Core Team <coreteam@netfilter.org>
* Copyright (c) 2006-2010 Patrick McHardy <kaber@trash.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/capability.h>
#include <linux/in.h>
#include <linux/skbuff.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/poison.h>
#include <linux/icmpv6.h>
#include <net/ipv6.h>
#include <net/compat.h>
#include <asm/uaccess.h>
#include <linux/mutex.h>
#include <linux/proc_fs.h>
#include <linux/err.h>
#include <linux/cpumask.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <linux/netfilter/x_tables.h>
#include <net/netfilter/nf_log.h>
#include "../../netfilter/xt_repldata.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("IPv6 packet filter");
#ifdef CONFIG_NETFILTER_DEBUG
#define IP_NF_ASSERT(x) WARN_ON(!(x))
#else
#define IP_NF_ASSERT(x)
#endif
void *ip6t_alloc_initial_table(const struct xt_table *info)
{
return xt_alloc_initial_table(ip6t, IP6T);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jan engelhardt | jan engelhardt | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(ip6t_alloc_initial_table);
/*
We keep a set of rules for each CPU, so we can avoid write-locking
them in the softirq when updating the counters and therefore
only need to read-lock in the softirq; doing a write_lock_bh() in user
context stops packets coming through and allows user context to read
the counters or update the rules.
Hence the start of any table is given by get_table() below. */
/* Returns whether matches rule or not. */
/* Performance critical - called for every packet */
static inline bool
ip6_packet_match(const struct sk_buff *skb,
const char *indev,
const char *outdev,
const struct ip6t_ip6 *ip6info,
unsigned int *protoff,
int *fragoff, bool *hotdrop)
{
unsigned long ret;
const struct ipv6hdr *ipv6 = ipv6_hdr(skb);
if (NF_INVF(ip6info, IP6T_INV_SRCIP,
ipv6_masked_addr_cmp(&ipv6->saddr, &ip6info->smsk,
&ip6info->src)) ||
NF_INVF(ip6info, IP6T_INV_DSTIP,
ipv6_masked_addr_cmp(&ipv6->daddr, &ip6info->dmsk,
&ip6info->dst)))
return false;
ret = ifname_compare_aligned(indev, ip6info->iniface, ip6info->iniface_mask);
if (NF_INVF(ip6info, IP6T_INV_VIA_IN, ret != 0))
return false;
ret = ifname_compare_aligned(outdev, ip6info->outiface, ip6info->outiface_mask);
if (NF_INVF(ip6info, IP6T_INV_VIA_OUT, ret != 0))
return false;
/* ... might want to do something with class and flowlabel here ... */
/* look for the desired protocol header */
if (ip6info->flags & IP6T_F_PROTO) {
int protohdr;
unsigned short _frag_off;
protohdr = ipv6_find_hdr(skb, protoff, -1, &_frag_off, NULL);
if (protohdr < 0) {
if (_frag_off == 0)
*hotdrop = true;
return false;
}
*fragoff = _frag_off;
if (ip6info->proto == protohdr) {
if (ip6info->invflags & IP6T_INV_PROTO)
return false;
return true;
}
/* We need match for the '-p all', too! */
if ((ip6info->proto != 0) &&
!(ip6info->invflags & IP6T_INV_PROTO))
return false;
}
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 153 | 53.31% | 1 | 7.14% |
patrick mchardy | patrick mchardy | 38 | 13.24% | 4 | 28.57% |
yasuyuki kozakai | yasuyuki kozakai | 30 | 10.45% | 1 | 7.14% |
andras kis-szabo | andras kis-szabo | 20 | 6.97% | 1 | 7.14% |
joe perches | joe perches | 20 | 6.97% | 1 | 7.14% |
jan engelhardt | jan engelhardt | 11 | 3.83% | 2 | 14.29% |
eric dumazet | eric dumazet | 10 | 3.48% | 2 | 14.29% |
arnaldo carvalho de melo | arnaldo carvalho de melo | 3 | 1.05% | 1 | 7.14% |
hans schillstrom | hans schillstrom | 2 | 0.70% | 1 | 7.14% |
| Total | 287 | 100.00% | 14 | 100.00% |
/* should be ip6 safe */
static bool
ip6_checkentry(const struct ip6t_ip6 *ipv6)
{
if (ipv6->flags & ~IP6T_F_MASK)
return false;
if (ipv6->invflags & ~IP6T_INV_MASK)
return false;
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 35 | 89.74% | 1 | 50.00% |
jan engelhardt | jan engelhardt | 4 | 10.26% | 1 | 50.00% |
| Total | 39 | 100.00% | 2 | 100.00% |
static unsigned int
ip6t_error(struct sk_buff *skb, const struct xt_action_param *par)
{
net_info_ratelimited("error: `%s'\n", (const char *)par->targinfo);
return NF_DROP;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 27 | 77.14% | 1 | 16.67% |
jan engelhardt | jan engelhardt | 6 | 17.14% | 3 | 50.00% |
joe perches | joe perches | 1 | 2.86% | 1 | 16.67% |
herbert xu | herbert xu | 1 | 2.86% | 1 | 16.67% |
| Total | 35 | 100.00% | 6 | 100.00% |
static inline struct ip6t_entry *
get_entry(const void *base, unsigned int offset)
{
return (struct ip6t_entry *)(base + offset);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 29 | 96.67% | 1 | 50.00% |
jan engelhardt | jan engelhardt | 1 | 3.33% | 1 | 50.00% |
| Total | 30 | 100.00% | 2 | 100.00% |
/* All zeroes == unconditional rule. */
/* Mildly perf critical (only if packet tracing is on) */
static inline bool unconditional(const struct ip6t_entry *e)
{
static const struct ip6t_ip6 uncond;
return e->target_offset == sizeof(struct ip6t_entry) &&
memcmp(&e->ipv6, &uncond, sizeof(uncond)) == 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jozsef kadlecsik | jozsef kadlecsik | 17 | 35.42% | 1 | 33.33% |
jan engelhardt | jan engelhardt | 16 | 33.33% | 1 | 33.33% |
florian westphal | florian westphal | 15 | 31.25% | 1 | 33.33% |
| Total | 48 | 100.00% | 3 | 100.00% |
static inline const struct xt_entry_target *
ip6t_get_target_c(const struct ip6t_entry *e)
{
return ip6t_get_target((struct ip6t_entry *)e);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jan engelhardt | jan engelhardt | 27 | 100.00% | 2 | 100.00% |
| Total | 27 | 100.00% | 2 | 100.00% |
#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
/* This cries for unification! */
static const char *const hooknames[] = {
[NF_INET_PRE_ROUTING] = "PREROUTING",
[NF_INET_LOCAL_IN] = "INPUT",
[NF_INET_FORWARD] = "FORWARD",
[NF_INET_LOCAL_OUT] = "OUTPUT",
[NF_INET_POST_ROUTING] = "POSTROUTING",
};
enum nf_ip_trace_comments {
NF_IP6_TRACE_COMMENT_RULE,
NF_IP6_TRACE_COMMENT_RETURN,
NF_IP6_TRACE_COMMENT_POLICY,
};
static const char *const comments[] = {
[NF_IP6_TRACE_COMMENT_RULE] = "rule",
[NF_IP6_TRACE_COMMENT_RETURN] = "return",
[NF_IP6_TRACE_COMMENT_POLICY] = "policy",
};
static struct nf_loginfo trace_loginfo = {
.type = NF_LOG_TYPE_LOG,
.u = {
.log = {
.level = LOGLEVEL_WARNING,
.logflags = NF_LOG_MASK,
},
},
};
/* Mildly perf critical (only if packet tracing is on) */
static inline int
get_chainname_rulenum(const struct ip6t_entry *s, const struct ip6t_entry *e,
const char *hookname, const char **chainname,
const char **comment, unsigned int *rulenum)
{
const struct xt_standard_target *t = (void *)ip6t_get_target_c(s);
if (strcmp(t->target.u.kernel.target->name, XT_ERROR_TARGET) == 0) {
/* Head of user chain: ERROR target with chainname */
*chainname = t->target.data;
(*rulenum) = 0;
} else if (s == e) {
(*rulenum)++;
if (unconditional(s) &&
strcmp(t->target.u.kernel.target->name,
XT_STANDARD_TARGET) == 0 &&
t->verdict < 0) {
/* Tail of chains: STANDARD target (return/policy) */
*comment = *chainname == hookname
? comments[NF_IP6_TRACE_COMMENT_POLICY]
: comments[NF_IP6_TRACE_COMMENT_RETURN];
}
return 1;
} else
(*rulenum)++;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jozsef kadlecsik | jozsef kadlecsik | 165 | 93.22% | 1 | 16.67% |
jan engelhardt | jan engelhardt | 10 | 5.65% | 4 | 66.67% |
florian westphal | florian westphal | 2 | 1.13% | 1 | 16.67% |
| Total | 177 | 100.00% | 6 | 100.00% |
static void trace_packet(struct net *net,
const struct sk_buff *skb,
unsigned int hook,
const struct net_device *in,
const struct net_device *out,
const char *tablename,
const struct xt_table_info *private,
const struct ip6t_entry *e)
{
const struct ip6t_entry *root;
const char *hookname, *chainname, *comment;
const struct ip6t_entry *iter;
unsigned int rulenum = 0;
root = get_entry(private->entries, private->hook_entry[hook]);
hookname = chainname = hooknames[hook];
comment = comments[NF_IP6_TRACE_COMMENT_RULE];
xt_entry_foreach(iter, root, private->size - private->hook_entry[hook])
if (get_chainname_rulenum(iter, e, hookname,
&chainname, &comment, &rulenum) != 0)
break;
nf_log_trace(net, AF_INET6, hook, skb, in, out, &trace_loginfo,
"TRACE: %s:%s:%s:%u ",
tablename, chainname, comment, rulenum);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jozsef kadlecsik | jozsef kadlecsik | 134 | 78.82% | 1 | 11.11% |
jan engelhardt | jan engelhardt | 25 | 14.71% | 4 | 44.44% |
eric w. biederman | eric w. biederman | 5 | 2.94% | 1 | 11.11% |
florian westphal | florian westphal | 3 | 1.76% | 1 | 11.11% |
gao feng | gao feng | 2 | 1.18% | 1 | 11.11% |
pablo neira ayuso | pablo neira ayuso | 1 | 0.59% | 1 | 11.11% |
| Total | 170 | 100.00% | 9 | 100.00% |
#endif
static inline struct ip6t_entry *
ip6t_next_entry(const struct ip6t_entry *entry)
{
return (void *)entry + entry->next_offset;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jan engelhardt | jan engelhardt | 17 | 65.38% | 1 | 50.00% |
florian westphal | florian westphal | 9 | 34.62% | 1 | 50.00% |
| Total | 26 | 100.00% | 2 | 100.00% |
/* Returns one of the generic firewall policies, like NF_ACCEPT. */
unsigned int
ip6t_do_table(struct sk_buff *skb,
const struct nf_hook_state *state,
struct xt_table *table)
{
unsigned int hook = state->hook;
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
/* Initializing verdict to NF_DROP keeps gcc happy. */
unsigned int verdict = NF_DROP;
const char *indev, *outdev;
const void *table_base;
struct ip6t_entry *e, **jumpstack;
unsigned int stackidx, cpu;
const struct xt_table_info *private;
struct xt_action_param acpar;
unsigned int addend;
/* Initialization */
stackidx = 0;
indev = state->in ? state->in->name : nulldevname;
outdev = state->out ? state->out->name : nulldevname;
/* We handle fragments by dealing with the first fragment as
* if it was a normal packet. All other fragments are treated
* normally, except that they will NEVER match rules that ask
* things we don't know, ie. tcp syn flag or ports). If the
* rule is also a fragment-specific rule, non-fragments won't
* match it. */
acpar.hotdrop = false;
acpar.net = state->net;
acpar.in = state->in;
acpar.out = state->out;
acpar.family = NFPROTO_IPV6;
acpar.hooknum = hook;
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
local_bh_disable();
addend = xt_write_recseq_begin();
private = table->private;
/*
* Ensure we load private-> members after we've fetched the base
* pointer.
*/
smp_read_barrier_depends();
cpu = smp_processor_id();
table_base = private->entries;
jumpstack = (struct ip6t_entry **)private->jumpstack[cpu];
/* Switch to alternate jumpstack if we're being invoked via TEE.
* TEE issues XT_CONTINUE verdict on original skb so we must not
* clobber the jumpstack.
*
* For recursion via REJECT or SYNPROXY the stack will be clobbered
* but it is no problem since absolute verdict is issued by these.
*/
if (static_key_false(&xt_tee_enabled))
jumpstack += private->stacksize * __this_cpu_read(nf_skb_duplicated);
e = get_entry(table_base, private->hook_entry[hook]);
do {
const struct xt_entry_target *t;
const struct xt_entry_match *ematch;
struct xt_counters *counter;
IP_NF_ASSERT(e);
acpar.thoff = 0;
if (!ip6_packet_match(skb, indev, outdev, &e->ipv6,
&acpar.thoff, &acpar.fragoff, &acpar.hotdrop)) {
no_match:
e = ip6t_next_entry(e);
continue;
}
xt_ematch_foreach(ematch, e) {
acpar.match = ematch->u.kernel.match;
acpar.matchinfo = ematch->data;
if (!acpar.match->match(skb, &acpar))
goto no_match;
}
counter = xt_get_this_cpu_counter(&e->counters);
ADD_COUNTER(*counter, skb->len, 1);
t = ip6t_get_target_c(e);
IP_NF_ASSERT(t->u.kernel.target);
#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
/* The packet is traced: log it */
if (unlikely(skb->nf_trace))
trace_packet(state->net, skb, hook, state->in,
state->out, table->name, private, e);
#endif
/* Standard target? */
if (!t->u.kernel.target->target) {
int v;
v = ((struct xt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
if (v != XT_RETURN) {
verdict = (unsigned int)(-v) - 1;
break;
}
if (stackidx == 0)
e = get_entry(table_base,
private->underflow[hook]);
else
e = ip6t_next_entry(jumpstack[--stackidx]);
continue;
}
if (table_base + v != ip6t_next_entry(e) &&
!(e->ipv6.flags & IP6T_F_GOTO)) {
jumpstack[stackidx++] = e;
}
e = get_entry(table_base, v);
continue;
}
acpar.target = t->u.kernel.target;
acpar.targinfo = t->data;
verdict = t->u.kernel.target->target(skb, &acpar);
if (verdict == XT_CONTINUE)
e = ip6t_next_entry(e);
else
/* Verdict */
break;
} while (!acpar.hotdrop);
xt_write_recseq_end(addend);
local_bh_enable();
if (acpar.hotdrop)
return NF_DROP;
else return verdict;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 302 | 43.58% | 1 | 2.56% |
jan engelhardt | jan engelhardt | 196 | 28.28% | 14 | 35.90% |
florian westphal | florian westphal | 41 | 5.92% | 3 | 7.69% |
jozsef kadlecsik | jozsef kadlecsik | 34 | 4.91% | 1 | 2.56% |
patrick mchardy | patrick mchardy | 20 | 2.89% | 3 | 7.69% |
eric w. biederman | eric w. biederman | 20 | 2.89% | 3 | 7.69% |
eric dumazet | eric dumazet | 19 | 2.74% | 3 | 7.69% |
david s. miller | david s. miller | 18 | 2.60% | 1 | 2.56% |
harald welte | harald welte | 18 | 2.60% | 2 | 5.13% |
herbert xu | herbert xu | 7 | 1.01% | 1 | 2.56% |
hans schillstrom | hans schillstrom | 6 | 0.87% | 1 | 2.56% |
will deacon | will deacon | 4 | 0.58% | 1 | 2.56% |
yasuyuki kozakai | yasuyuki kozakai | 3 | 0.43% | 1 | 2.56% |
stephen hemminger | stephen hemminger | 2 | 0.29% | 1 | 2.56% |
changli gao | changli gao | 1 | 0.14% | 1 | 2.56% |
andras kis-szabo | andras kis-szabo | 1 | 0.14% | 1 | 2.56% |
americo wang | americo wang | 1 | 0.14% | 1 | 2.56% |
| Total | 693 | 100.00% | 39 | 100.00% |
/* Figures out from what hook each rule can be called: returns 0 if
there are loops. Puts hook bitmask in comefrom. */
static int
mark_source_chains(const struct xt_table_info *newinfo,
unsigned int valid_hooks, void *entry0,
unsigned int *offsets)
{
unsigned int hook;
/* No recursion; use packet counter to save back ptrs (reset
to 0 as we leave), and comefrom to save source hook bitmask */
for (hook = 0; hook < NF_INET_NUMHOOKS; hook++) {
unsigned int pos = newinfo->hook_entry[hook];
struct ip6t_entry *e = (struct ip6t_entry *)(entry0 + pos);
if (!(valid_hooks & (1 << hook)))
continue;
/* Set initial back pointer. */
e->counters.pcnt = pos;
for (;;) {
const struct xt_standard_target *t
= (void *)ip6t_get_target_c(e);
int visited = e->comefrom & (1 << hook);
if (e->comefrom & (1 << NF_INET_NUMHOOKS))
return 0;
e->comefrom |= ((1 << hook) | (1 << NF_INET_NUMHOOKS));
/* Unconditional return/END. */
if ((unconditional(e) &&
(strcmp(t->target.u.user.name,
XT_STANDARD_TARGET) == 0) &&
t->verdict < 0) || visited) {
unsigned int oldpos, size;
if ((strcmp(t->target.u.user.name,
XT_STANDARD_TARGET) == 0) &&
t->verdict < -NF_MAX_VERDICT - 1)
return 0;
/* Return: backtrack through the last
big jump. */
do {
e->comefrom ^= (1<<NF_INET_NUMHOOKS);
oldpos = pos;
pos = e->counters.pcnt;
e->counters.pcnt = 0;
/* We're at the start. */
if (pos == oldpos)
goto next;
e = (struct ip6t_entry *)
(entry0 + pos);
} while (oldpos == pos + e->next_offset);
/* Move along one */
size = e->next_offset;
e = (struct ip6t_entry *)
(entry0 + pos + size);
if (pos + size >= newinfo->size)
return 0;
e->counters.pcnt = pos;
pos += size;
} else {
int newpos = t->verdict;
if (strcmp(t->target.u.user.name,
XT_STANDARD_TARGET) == 0 &&
newpos >= 0) {
/* This a jump; chase it. */
if (!xt_find_jump_offset(offsets, newpos,
newinfo->number))
return 0;
e = (struct ip6t_entry *)
(entry0 + newpos);
} else {
/* ... this is a fallthru */
newpos = pos + e->next_offset;
if (newpos >= newinfo->size)
return 0;
}
e = (struct ip6t_entry *)
(entry0 + newpos);
e->counters.pcnt = pos;
pos = newpos;
}
}
next: ;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 336 | 70.59% | 2 | 11.76% |
florian westphal | florian westphal | 62 | 13.03% | 5 | 29.41% |
patrick mchardy | patrick mchardy | 35 | 7.35% | 3 | 17.65% |
pre-git | pre-git | 18 | 3.78% | 1 | 5.88% |
dmitry mishin | dmitry mishin | 14 | 2.94% | 1 | 5.88% |
jan engelhardt | jan engelhardt | 6 | 1.26% | 3 | 17.65% |
al viro | al viro | 4 | 0.84% | 1 | 5.88% |
pablo neira ayuso | pablo neira ayuso | 1 | 0.21% | 1 | 5.88% |
| Total | 476 | 100.00% | 17 | 100.00% |
static void cleanup_match(struct xt_entry_match *m, struct net *net)
{
struct xt_mtdtor_param par;
par.net = net;
par.match = m->u.kernel.match;
par.matchinfo = m->data;
par.family = NFPROTO_IPV6;
if (par.match->destroy != NULL)
par.match->destroy(&par);
module_put(par.match->me);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jan engelhardt | jan engelhardt | 36 | 44.44% | 4 | 50.00% |
harald welte | harald welte | 32 | 39.51% | 2 | 25.00% |
alexey dobriyan | alexey dobriyan | 10 | 12.35% | 1 | 12.50% |
patrick mchardy | patrick mchardy | 3 | 3.70% | 1 | 12.50% |
| Total | 81 | 100.00% | 8 | 100.00% |
static int check_match(struct xt_entry_match *m, struct xt_mtchk_param *par)
{
const struct ip6t_ip6 *ipv6 = par->entryinfo;
par->match = m->u.kernel.match;
par->matchinfo = m->data;
return xt_check_match(par, m->u.match_size - sizeof(*m),
ipv6->proto, ipv6->invflags & IP6T_INV_PROTO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 37 | 50.00% | 1 | 16.67% |
jan engelhardt | jan engelhardt | 21 | 28.38% | 2 | 33.33% |
pre-git | pre-git | 8 | 10.81% | 1 | 16.67% |
harald welte | harald welte | 7 | 9.46% | 1 | 16.67% |
pablo neira ayuso | pablo neira ayuso | 1 | 1.35% | 1 | 16.67% |
| Total | 74 | 100.00% | 6 | 100.00% |
static int
find_check_match(struct xt_entry_match *m, struct xt_mtchk_param *par)
{
struct xt_match *match;
int ret;
match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name,
m->u.user.revision);
if (IS_ERR(match))
return PTR_ERR(match);
m->u.kernel.match = match;
ret = check_match(m, par);
if (ret)
goto err;
return 0;
err:
module_put(m->u.kernel.match->me);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 63 | 58.88% | 1 | 16.67% |
harald welte | harald welte | 33 | 30.84% | 1 | 16.67% |
jan engelhardt | jan engelhardt | 6 | 5.61% | 3 | 50.00% |
pre-git | pre-git | 5 | 4.67% | 1 | 16.67% |
| Total | 107 | 100.00% | 6 | 100.00% |
static int check_target(struct ip6t_entry *e, struct net *net, const char *name)
{
struct xt_entry_target *t = ip6t_get_target(e);
struct xt_tgchk_param par = {
.net = net,
.table = name,
.entryinfo = e,
.target = t->u.kernel.target,
.targinfo = t->data,
.hook_mask = e->comefrom,
.family = NFPROTO_IPV6,
};
t = ip6t_get_target(e);
return xt_check_target(&par, t->u.target_size - sizeof(*t),
e->ipv6.proto,
e->ipv6.invflags & IP6T_INV_PROTO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 70 | 57.38% | 3 | 37.50% |
jan engelhardt | jan engelhardt | 48 | 39.34% | 3 | 37.50% |
harald welte | harald welte | 3 | 2.46% | 1 | 12.50% |
pablo neira ayuso | pablo neira ayuso | 1 | 0.82% | 1 | 12.50% |
| Total | 122 | 100.00% | 8 | 100.00% |
static int
find_check_entry(struct ip6t_entry *e, struct net *net, const char *name,
unsigned int size)
{
struct xt_entry_target *t;
struct xt_target *target;
int ret;
unsigned int j;
struct xt_mtchk_param mtpar;
struct xt_entry_match *ematch;
unsigned long pcnt;
pcnt = xt_percpu_counter_alloc();
if (IS_ERR_VALUE(pcnt))
return -ENOMEM;
e->counters.pcnt = pcnt;
j = 0;
mtpar.net = net;
mtpar.table = name;
mtpar.entryinfo = &e->ipv6;
mtpar.hook_mask = e->comefrom;
mtpar.family = NFPROTO_IPV6;
xt_ematch_foreach(ematch, e) {
ret = find_check_match(ematch, &mtpar);
if (ret != 0)
goto cleanup_matches;
++j;
}
t = ip6t_get_target(e);
target = xt_request_find_target(NFPROTO_IPV6, t->u.user.name,
t->u.user.revision);
if (IS_ERR(target)) {
ret = PTR_ERR(target);
goto cleanup_matches;
}
t->u.kernel.target = target;
ret = check_target(e, net, name);
if (ret)
goto err;
return 0;
err:
module_put(t->u.kernel.target->me);
cleanup_matches:
xt_ematch_foreach(ematch, e) {
if (j-- == 0)
break;
cleanup_match(ematch, net);
}
xt_percpu_counter_free(e->counters.pcnt);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 89 | 31.79% | 1 | 6.25% |
jan engelhardt | jan engelhardt | 69 | 24.64% | 7 | 43.75% |
pre-git | pre-git | 39 | 13.93% | 1 | 6.25% |
patrick mchardy | patrick mchardy | 34 | 12.14% | 3 | 18.75% |
florian westphal | florian westphal | 25 | 8.93% | 1 | 6.25% |
pablo neira ayuso | pablo neira ayuso | 12 | 4.29% | 1 | 6.25% |
alexey dobriyan | alexey dobriyan | 12 | 4.29% | 2 | 12.50% |
| Total | 280 | 100.00% | 16 | 100.00% |
static bool check_underflow(const struct ip6t_entry *e)
{
const struct xt_entry_target *t;
unsigned int verdict;
if (!unconditional(e))
return false;
t = ip6t_get_target_c(e);
if (strcmp(t->u.user.name, XT_STANDARD_TARGET) != 0)
return false;
verdict = ((struct xt_standard_target *)t)->verdict;
verdict = -verdict - 1;
return verdict == NF_DROP || verdict == NF_ACCEPT;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jan engelhardt | jan engelhardt | 89 | 100.00% | 3 | 100.00% |
| Total | 89 | 100.00% | 3 | 100.00% |
static int
check_entry_size_and_hooks(struct ip6t_entry *e,
struct xt_table_info *newinfo,
const unsigned char *base,
const unsigned char *limit,
const unsigned int *hook_entries,
const unsigned int *underflows,
unsigned int valid_hooks)
{
unsigned int h;
int err;
if ((unsigned long)e % __alignof__(struct ip6t_entry) != 0 ||
(unsigned char *)e + sizeof(struct ip6t_entry) >= limit ||
(unsigned char *)e + e->next_offset > limit)
return -EINVAL;
if (e->next_offset
< sizeof(struct ip6t_entry) + sizeof(struct xt_entry_target))
return -EINVAL;
if (!ip6_checkentry(&e->ipv6))
return -EINVAL;
err = xt_check_entry_offsets(e, e->elems, e->target_offset,
e->next_offset);
if (err)
return err;
/* Check hooks & underflows */
for (h = 0; h < NF_INET_NUMHOOKS; h++) {
if (!(valid_hooks & (1 << h)))
continue;
if ((unsigned char *)e - base == hook_entries[h])
newinfo->hook_entry[h] = hook_entries[h];
if ((unsigned char *)e - base == underflows[h]) {
if (!check_underflow(e))
return -EINVAL;
newinfo->underflow[h] = underflows[h];
}
}
/* Clear counters and comefrom */
e->counters = ((struct xt_counters) { 0, 0 });
e->comefrom = 0;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 154 | 53.47% | 1 | 8.33% |
florian westphal | florian westphal | 57 | 19.79% | 4 | 33.33% |
pre-git | pre-git | 44 | 15.28% | 1 | 8.33% |
jan engelhardt | jan engelhardt | 32 | 11.11% | 5 | 41.67% |
patrick mchardy | patrick mchardy | 1 | 0.35% | 1 | 8.33% |
| Total | 288 | 100.00% | 12 | 100.00% |
static void cleanup_entry(struct ip6t_entry *e, struct net *net)
{
struct xt_tgdtor_param par;
struct xt_entry_target *t;
struct xt_entry_match *ematch;
/* Cleanup all matches */
xt_ematch_foreach(ematch, e)
cleanup_match(ematch, net);
t = ip6t_get_target(e);
par.net = net;
par.target = t->u.kernel.target;
par.targinfo = t->data;
par.family = NFPROTO_IPV6;
if (par.target->destroy != NULL)
par.target->destroy(&par);
module_put(par.target->me);
xt_percpu_counter_free(e->counters.pcnt);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jan engelhardt | jan engelhardt | 48 | 39.67% | 6 | 46.15% |
harald welte | harald welte | 32 | 26.45% | 2 | 15.38% |
pre-git | pre-git | 18 | 14.88% | 1 | 7.69% |
florian westphal | florian westphal | 9 | 7.44% | 1 | 7.69% |
patrick mchardy | patrick mchardy | 9 | 7.44% | 2 | 15.38% |
alexey dobriyan | alexey dobriyan | 5 | 4.13% | 1 | 7.69% |
| Total | 121 | 100.00% | 13 | 100.00% |
/* Checks and translates the user-supplied table segment (held in
newinfo) */
static int
translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0,
const struct ip6t_replace *repl)
{
struct ip6t_entry *iter;
unsigned int *offsets;
unsigned int i;
int ret = 0;
newinfo->size = repl->size;
newinfo->number = repl->num_entries;
/* Init all hooks to impossible value. */
for (i = 0; i < NF_INET_NUMHOOKS; i++) {
newinfo->hook_entry[i] = 0xFFFFFFFF;
newinfo->underflow[i] = 0xFFFFFFFF;
}
offsets = xt_alloc_entry_offsets(newinfo->number);
if (!offsets)
return -ENOMEM;
i = 0;
/* Walk through entries, checking offsets. */
xt_entry_foreach(iter, entry0, newinfo->size) {
ret = check_entry_size_and_hooks(iter, newinfo, entry0,
entry0 + repl->size,
repl->hook_entry,
repl->underflow,
repl->valid_hooks);
if (ret != 0)
goto out_free;
if (i < repl->num_entries)
offsets[i] = (void *)iter - entry0;
++i;
if (strcmp(ip6t_get_target(iter)->u.user.name,
XT_ERROR_TARGET) == 0)
++newinfo->stacksize;
}
ret = -EINVAL;
if (i != repl->num_entries)
goto out_free;
/* Check hooks all assigned */
for (i = 0; i < NF_INET_NUMHOOKS; i++) {
/* Only hooks which are valid */
if (!(repl->valid_hooks & (1 << i)))
continue;
if (newinfo->hook_entry[i] == 0xFFFFFFFF)
goto out_free;
if (newinfo->underflow[i] == 0xFFFFFFFF)
goto out_free;
}
if (!mark_source_chains(newinfo, repl->valid_hooks, entry0, offsets)) {
ret = -ELOOP;
goto out_free;
}
kvfree(offsets);
/* Finally, each sanity check must pass */
i = 0;
xt_entry_foreach(iter, entry0, newinfo->size) {
ret = find_check_entry(iter, net, repl->name, repl->size);
if (ret != 0)
break;
++i;
}
if (ret != 0) {
xt_entry_foreach(iter, entry0, newinfo->size) {
if (i-- == 0)
break;
cleanup_entry(iter, net);
}
return ret;
}
return ret;
out_free:
kvfree(offsets);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 124 | 29.95% | 1 | 5.88% |
florian westphal | florian westphal | 111 | 26.81% | 2 | 11.76% |
jan engelhardt | jan engelhardt | 92 | 22.22% | 4 | 23.53% |
pre-git | pre-git | 43 | 10.39% | 1 | 5.88% |
dmitry mishin | dmitry mishin | 22 | 5.31% | 2 | 11.76% |
pablo neira ayuso | pablo neira ayuso | 8 | 1.93% | 1 | 5.88% |
alexey dobriyan | alexey dobriyan | 8 | 1.93% | 2 | 11.76% |
patrick mchardy | patrick mchardy | 4 | 0.97% | 3 | 17.65% |
rusty russell | rusty russell | 2 | 0.48% | 1 | 5.88% |
| Total | 414 | 100.00% | 17 | 100.00% |
static void
get_counters(const struct xt_table_info *t,
struct xt_counters counters[])
{
struct ip6t_entry *iter;
unsigned int cpu;
unsigned int i;
for_each_possible_cpu(cpu) {
seqcount_t *s = &per_cpu(xt_recseq, cpu);
i = 0;
xt_entry_foreach(iter, t->entries, t->size) {
struct xt_counters *tmp;
u64 bcnt, pcnt;
unsigned int start;
tmp = xt_get_per_cpu_counter(&iter->counters, cpu);
do {
start = read_seqcount_begin(s);
bcnt = tmp->bcnt;
pcnt = tmp->pcnt;
} while (read_seqcount_retry(s, start));
ADD_COUNTER(counters[i], bcnt, pcnt);
++i;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
eric dumazet | eric dumazet | 44 | 32.59% | 3 | 30.00% |
jan engelhardt | jan engelhardt | 31 | 22.96% | 2 | 20.00% |
harald welte | harald welte | 30 | 22.22% | 1 | 10.00% |
florian westphal | florian westphal | 20 | 14.81% | 2 | 20.00% |
stephen hemminger | stephen hemminger | 7 | 5.19% | 1 | 10.00% |
pre-git | pre-git | 3 | 2.22% | 1 | 10.00% |
| Total | 135 | 100.00% | 10 | 100.00% |
static struct xt_counters *alloc_counters(const struct xt_table *table)
{
unsigned int countersize;
struct xt_counters *counters;
const struct xt_table_info *private = table->private;
/* We need atomic snapshot of counters: rest doesn't change
(other than comefrom, which userspace doesn't care
about). */
countersize = sizeof(struct xt_counters) * private->number;
counters = vzalloc(countersize);
if (counters == NULL)
return ERR_PTR(-ENOMEM);
get_counters(private, counters);
return counters;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 39 | 51.32% | 1 | 12.50% |
pre-git | pre-git | 19 | 25.00% | 1 | 12.50% |
stephen hemminger | stephen hemminger | 7 | 9.21% | 2 | 25.00% |
patrick mchardy | patrick mchardy | 5 | 6.58% | 1 | 12.50% |
eric dumazet | eric dumazet | 4 | 5.26% | 2 | 25.00% |
jan engelhardt | jan engelhardt | 2 | 2.63% | 1 | 12.50% |
| Total | 76 | 100.00% | 8 | 100.00% |
static int
copy_entries_to_user(unsigned int total_size,
const struct xt_table *table,
void __user *userptr)
{
unsigned int off, num;
const struct ip6t_entry *e;
struct xt_counters *counters;
const struct xt_table_info *private = table->private;
int ret = 0;
const void *loc_cpu_entry;
counters = alloc_counters(table);
if (IS_ERR(counters))
return PTR_ERR(counters);
loc_cpu_entry = private->entries;
if (copy_to_user(userptr, loc_cpu_entry, total_size) != 0) {
ret = -EFAULT;
goto free_counters;
}
/* FIXME: use iterator macros --RR */
/* ... then go back and fix counters and names */
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
unsigned int i;
const struct xt_entry_match *m;
const struct xt_entry_target *t;
e = (struct ip6t_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
+ offsetof(struct ip6t_entry, counters),
&counters[num],
sizeof(counters[num])) != 0) {
ret = -EFAULT;
goto free_counters;
}
for (i = sizeof(struct ip6t_entry);
i < e->target_offset;
i += m->u.match_size) {
m = (void *)e + i;
if (copy_to_user(userptr + off + i
+ offsetof(struct xt_entry_match,
u.user.name),
m->u.kernel.match->name,
strlen(m->u.kernel.match->name)+1)
!= 0) {
ret = -EFAULT;
goto free_counters;
}
}
t = ip6t_get_target_c(e);
if (copy_to_user(userptr + off + e->target_offset
+ offsetof(struct xt_entry_target,
u.user.name),
t->u.kernel.target->name,
strlen(t->u.kernel.target->name)+1) != 0) {
ret = -EFAULT;
goto free_counters;
}
}
free_counters:
vfree(counters);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 224 | 58.79% | 1 | 11.11% |
patrick mchardy | patrick mchardy | 73 | 19.16% | 1 | 11.11% |
pre-git | pre-git | 67 | 17.59% | 1 | 11.11% |
jan engelhardt | jan engelhardt | 10 | 2.62% | 3 | 33.33% |
david s. miller | david s. miller | 4 | 1.05% | 1 | 11.11% |
eric dumazet | eric dumazet | 3 | 0.79% | 2 | 22.22% |
| Total | 381 | 100.00% | 9 | 100.00% |
#ifdef CONFIG_COMPAT
static void compat_standard_from_user(void *dst, const void *src)
{
int v = *(compat_int_t *)src;
if (v > 0)
v += xt_compat_calc_jump(AF_INET6, v);
memcpy(dst, &v, sizeof(v));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 52 | 98.11% | 2 | 66.67% |
jan engelhardt | jan engelhardt | 1 | 1.89% | 1 | 33.33% |
| Total | 53 | 100.00% | 3 | 100.00% |
static int compat_standard_to_user(void __user *dst, const void *src)
{
compat_int_t cv = *(int *)src;
if (cv > 0)
cv -= xt_compat_calc_jump(AF_INET6, cv);
return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 59 | 98.33% | 2 | 66.67% |
jan engelhardt | jan engelhardt | 1 | 1.67% | 1 | 33.33% |
| Total | 60 | 100.00% | 3 | 100.00% |
static int compat_calc_entry(const struct ip6t_entry *e,
const struct xt_table_info *info,
const void *base, struct xt_table_info *newinfo)
{
const struct xt_entry_match *ematch;
const struct xt_entry_target *t;
unsigned int entry_offset;
int off, i, ret;
off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry);
entry_offset = (void *)e - base;
xt_ematch_foreach(ematch, e)
off += xt_compat_match_offset(ematch->u.kernel.match);
t = ip6t_get_target_c(e);
off += xt_compat_target_offset(t->u.kernel.target);
newinfo->size -= off;
ret = xt_compat_add_offset(AF_INET6, entry_offset, off);
if (ret)
return ret;
for (i = 0; i < NF_INET_NUMHOOKS; i++) {
if (info->hook_entry[i] &&
(e < (struct ip6t_entry *)(base + info->hook_entry[i])))
newinfo->hook_entry[i] -= off;
if (info->underflow[i] &&
(e < (struct ip6t_entry *)(base + info->underflow[i])))
newinfo->underflow[i] -= off;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 205 | 88.36% | 2 | 33.33% |
jan engelhardt | jan engelhardt | 27 | 11.64% | 4 | 66.67% |
| Total | 232 | 100.00% | 6 | 100.00% |
static int compat_table_info(const struct xt_table_info *info,
struct xt_table_info *newinfo)
{
struct ip6t_entry *iter;
const void *loc_cpu_entry;
int ret;
if (!newinfo || !info)
return -EINVAL;
/* we dont care about newinfo->entries */
memcpy(newinfo, info, offsetof(struct xt_table_info, entries));
newinfo->initial_entries = 0;
loc_cpu_entry = info->entries;
xt_compat_init_offsets(AF_INET6, info->number);
xt_entry_foreach(iter, loc_cpu_entry, info->size) {
ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo);
if (ret != 0)
return ret;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 63 | 55.26% | 2 | 22.22% |
jan engelhardt | jan engelhardt | 31 | 27.19% | 2 | 22.22% |
eric dumazet | eric dumazet | 10 | 8.77% | 2 | 22.22% |
pre-git | pre-git | 8 | 7.02% | 1 | 11.11% |
florian westphal | florian westphal | 1 | 0.88% | 1 | 11.11% |
harald welte | harald welte | 1 | 0.88% | 1 | 11.11% |
| Total | 114 | 100.00% | 9 | 100.00% |
#endif
static int get_info(struct net *net, void __user *user,
const int *len, int compat)
{
char name[XT_TABLE_MAXNAMELEN];
struct xt_table *t;
int ret;
if (*len != sizeof(struct ip6t_getinfo))
return -EINVAL;
if (copy_from_user(name, user, sizeof(name)) != 0)
return -EFAULT;
name[XT_TABLE_MAXNAMELEN-1] = '\0';
#ifdef CONFIG_COMPAT
if (compat)
xt_compat_lock(AF_INET6);
#endif
t = try_then_request_module(xt_find_table_lock(net, AF_INET6, name),
"ip6table_%s", name);
if (!IS_ERR_OR_NULL(t)) {
struct ip6t_getinfo info;
const struct xt_table_info *private = t->private;
#ifdef CONFIG_COMPAT
struct xt_table_info tmp;
if (compat) {
ret = compat_table_info(private, &tmp);
xt_compat_flush_offsets(AF_INET6);
private = &tmp;
}
#endif
memset(&info, 0, sizeof(info));
info.valid_hooks = t->valid_hooks;
memcpy(info.hook_entry, private->hook_entry,
sizeof(info.hook_entry));
memcpy(info.underflow, private->underflow,
sizeof(info.underflow));
info.num_entries = private->number;
info.size = private->size;
strcpy(info.name, name);
if (copy_to_user(user, &info, *len) != 0)
ret = -EFAULT;
else
ret = 0;
xt_table_unlock(t);
module_put(t->me);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
#ifdef CONFIG_COMPAT
if (compat)
xt_compat_unlock(AF_INET6);
#endif
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 238 | 73.91% | 3 | 20.00% |
harald welte | harald welte | 25 | 7.76% | 1 | 6.67% |
pre-git | pre-git | 23 | 7.14% | 1 | 6.67% |
jan engelhardt | jan engelhardt | 17 | 5.28% | 4 | 26.67% |
alexey dobriyan | alexey dobriyan | 11 | 3.42% | 3 | 20.00% |
eric dumazet | eric dumazet | 4 | 1.24% | 1 | 6.67% |
david s. miller | david s. miller | 3 | 0.93% | 1 | 6.67% |
hideaki yoshifuji | hideaki yoshifuji | 1 | 0.31% | 1 | 6.67% |
| Total | 322 | 100.00% | 15 | 100.00% |
static int
get_entries(struct net *net, struct ip6t_get_entries __user *uptr,
const int *len)
{
int ret;
struct ip6t_get_entries get;
struct xt_table *t;
if (*len < sizeof(get))
return -EINVAL;
if (copy_from_user(&get, uptr, sizeof(get)) != 0)
return -EFAULT;
if (*len != sizeof(struct ip6t_get_entries) + get.size)
return -EINVAL;
get.name[sizeof(get.name) - 1] = '\0';
t = xt_find_table_lock(net, AF_INET6, get.name);
if (!IS_ERR_OR_NULL(t)) {
struct xt_table_info *private = t->private;
if (get.size == private->size)
ret = copy_entries_to_user(private->size,
t, uptr->entrytable);
else
ret = -EAGAIN;
module_put(t->me);
xt_table_unlock(t);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 113 | 57.95% | 2 | 18.18% |
harald welte | harald welte | 31 | 15.90% | 1 | 9.09% |
pablo neira ayuso | pablo neira ayuso | 16 | 8.21% | 1 | 9.09% |
pre-git | pre-git | 11 | 5.64% | 1 | 9.09% |
eric dumazet | eric dumazet | 8 | 4.10% | 1 | 9.09% |
kirill korotaev | kirill korotaev | 7 | 3.59% | 1 | 9.09% |
alexey dobriyan | alexey dobriyan | 7 | 3.59% | 2 | 18.18% |
jan engelhardt | jan engelhardt | 1 | 0.51% | 1 | 9.09% |
hideaki yoshifuji | hideaki yoshifuji | 1 | 0.51% | 1 | 9.09% |
| Total | 195 | 100.00% | 11 | 100.00% |
static int
__do_replace(struct net *net, const char *name, unsigned int valid_hooks,
struct xt_table_info *newinfo, unsigned int num_counters,
void __user *counters_ptr)
{
int ret;
struct xt_table *t;
struct xt_table_info *oldinfo;
struct xt_counters *counters;
struct ip6t_entry *iter;
ret = 0;
counters = vzalloc(num_counters * sizeof(struct xt_counters));
if (!counters) {
ret = -ENOMEM;
goto out;
}
t = try_then_request_module(xt_find_table_lock(net, AF_INET6, name),
"ip6table_%s", name);
if (IS_ERR_OR_NULL(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free_newinfo_counters_untrans;
}
/* You lied! */
if (valid_hooks != t->valid_hooks) {
ret = -EINVAL;
goto put_module;
}
oldinfo = xt_replace_table(t, num_counters, newinfo, &ret);
if (!oldinfo)
goto put_module;
/* Update module usage count based on number of rules */
if ((oldinfo->number > oldinfo->initial_entries) ||
(newinfo->number <= oldinfo->initial_entries))
module_put(t->me);
if ((oldinfo->number > oldinfo->initial_entries) &&
(newinfo->number <= oldinfo->initial_entries))
module_put(t->me);
/* Get the old counters, and synchronize with replace */
get_counters(oldinfo, counters);
/* Decrease module usage counts and free resource */
xt_entry_foreach(iter, oldinfo->entries, oldinfo->size)
cleanup_entry(iter, net);
xt_free_table_info(oldinfo);
if (copy_to_user(counters_ptr, counters,
sizeof(struct xt_counters) * num_counters) != 0) {
/* Silent error, can't fail, new table is already in place */
net_warn_ratelimited("ip6tables: counters copy to user failed while replacing table\n");
}
vfree(counters);
xt_table_unlock(t);
return ret;
put_module:
module_put(t->me);
xt_table_unlock(t);
free_newinfo_counters_untrans:
vfree(counters);
out:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 124 | 38.04% | 1 | 7.14% |
patrick mchardy | patrick mchardy | 117 | 35.89% | 1 | 7.14% |
pre-git | pre-git | 49 | 15.03% | 1 | 7.14% |
jan engelhardt | jan engelhardt | 12 | 3.68% | 2 | 14.29% |
alexey dobriyan | alexey dobriyan | 8 | 2.45% | 3 | 21.43% |
thomas graf | thomas graf | 7 | 2.15% | 1 | 7.14% |
eric dumazet | eric dumazet | 6 | 1.84% | 2 | 14.29% |
hideaki yoshifuji | hideaki yoshifuji | 1 | 0.31% | 1 | 7.14% |
florian westphal | florian westphal | 1 | 0.31% | 1 | 7.14% |
stephen hemminger | stephen hemminger | 1 | 0.31% | 1 | 7.14% |
| Total | 326 | 100.00% | 14 | 100.00% |
static int
do_replace(struct net *net, const void __user *user, unsigned int len)
{
int ret;
struct ip6t_replace tmp;
struct xt_table_info *newinfo;
void *loc_cpu_entry;
struct ip6t_entry *iter;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters))
return -ENOMEM;
if (tmp.num_counters == 0)
return -EINVAL;
tmp.name[sizeof(tmp.name)-1] = 0;
newinfo = xt_alloc_table_info(tmp.size);
if (!newinfo)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
ret = translate_table(net, newinfo, loc_cpu_entry, &tmp);
if (ret != 0)
goto free_newinfo;
ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo,
tmp.num_counters, tmp.counters);
if (ret)
goto free_newinfo_untrans;
return 0;
free_newinfo_untrans:
xt_entry_foreach(iter, loc_cpu_entry, newinfo->size)
cleanup_entry(iter, net);
free_newinfo:
xt_free_table_info(newinfo);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 182 | 73.09% | 1 | 10.00% |
jan engelhardt | jan engelhardt | 24 | 9.64% | 4 | 40.00% |
vasiliy kulikov | vasiliy kulikov | 16 | 6.43% | 1 | 10.00% |
dave jones | dave jones | 12 | 4.82% | 1 | 10.00% |
alexey dobriyan | alexey dobriyan | 9 | 3.61% | 2 | 20.00% |
stephen hemminger | stephen hemminger | 6 | 2.41% | 1 | 10.00% |
| Total | 249 | 100.00% | 10 | 100.00% |
static int
do_add_counters(struct net *net, const void __user *user, unsigned int len,
int compat)
{
unsigned int i;
struct xt_counters_info tmp;
struct xt_counters *paddc;
struct xt_table *t;
const struct xt_table_info *private;
int ret = 0;
struct ip6t_entry *iter;
unsigned int addend;
paddc = xt_copy_counters_from_user(user, len, &tmp, compat);
if (IS_ERR(paddc))
return PTR_ERR(paddc);
t = xt_find_table_lock(net, AF_INET6, tmp.name);
if (IS_ERR_OR_NULL(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free;
}
local_bh_disable();
private = t->private;
if (private->number != tmp.num_counters) {
ret = -EINVAL;
goto unlock_up_free;
}
i = 0;
addend = xt_write_recseq_begin();
xt_entry_foreach(iter, private->entries, private->size) {
struct xt_counters *tmp;
tmp = xt_get_this_cpu_counter(&iter->counters);
ADD_COUNTER(*tmp, paddc[i].bcnt, paddc[i].pcnt);
++i;
}
xt_write_recseq_end(addend);
unlock_up_free:
local_bh_enable();
xt_table_unlock(t);
module_put(t->me);
free:
vfree(paddc);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 157 | 64.34% | 2 | 13.33% |
jan engelhardt | jan engelhardt | 31 | 12.70% | 4 | 26.67% |
florian westphal | florian westphal | 30 | 12.30% | 3 | 20.00% |
eric dumazet | eric dumazet | 10 | 4.10% | 1 | 6.67% |
stephen hemminger | stephen hemminger | 8 | 3.28% | 2 | 13.33% |
alexey dobriyan | alexey dobriyan | 7 | 2.87% | 2 | 13.33% |
hideaki yoshifuji | hideaki yoshifuji | 1 | 0.41% | 1 | 6.67% |
| Total | 244 | 100.00% | 15 | 100.00% |
#ifdef CONFIG_COMPAT
struct compat_ip6t_replace {
char name[XT_TABLE_MAXNAMELEN];
u32 valid_hooks;
u32 num_entries;
u32 size;
u32 hook_entry[NF_INET_NUMHOOKS];
u32 underflow[NF_INET_NUMHOOKS];
u32 num_counters;
compat_uptr_t counters; /* struct xt_counters * */
struct compat_ip6t_entry entries[0];
};
static int
compat_copy_entry_to_user(struct ip6t_entry *e, void __user **dstptr,
unsigned int *size, struct xt_counters *counters,
unsigned int i)
{
struct xt_entry_target *t;
struct compat_ip6t_entry __user *ce;
u_int16_t target_offset, next_offset;
compat_uint_t origsize;
const struct xt_entry_match *ematch;
int ret = 0;
origsize = *size;
ce = (struct compat_ip6t_entry __user *)*dstptr;
if (copy_to_user(ce, e, sizeof(struct ip6t_entry)) != 0 ||
copy_to_user(&ce->counters, &counters[i],
sizeof(counters[i])) != 0)
return -EFAULT;
*dstptr += sizeof(struct compat_ip6t_entry);
*size -= sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry);
xt_ematch_foreach(ematch, e) {
ret = xt_compat_match_to_user(ematch, dstptr, size);
if (ret != 0)
return ret;
}
target_offset = e->target_offset - (origsize - *size);
t = ip6t_get_target(e);
ret = xt_compat_target_to_user(t, dstptr, size);
if (ret)
return ret;
next_offset = e->next_offset - (origsize - *size);
if (put_user(target_offset, &ce->target_offset) != 0 ||
put_user(next_offset, &ce->next_offset) != 0)
return -EFAULT;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 211 | 81.78% | 2 | 33.33% |
jan engelhardt | jan engelhardt | 47 | 18.22% | 4 | 66.67% |
| Total | 258 | 100.00% | 6 | 100.00% |
static int
compat_find_calc_match(struct xt_entry_match *m,
const struct ip6t_ip6 *ipv6,
int *size)
{
struct xt_match *match;
match = xt_request_find_match(NFPROTO_IPV6, m->u.user.name,
m->u.user.revision);
if (IS_ERR(match))
return PTR_ERR(match);
m->u.kernel.match = match;
*size += xt_compat_match_offset(match);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 80 | 96.39% | 1 | 33.33% |
jan engelhardt | jan engelhardt | 3 | 3.61% | 2 | 66.67% |
| Total | 83 | 100.00% | 3 | 100.00% |
static void compat_release_entry(struct compat_ip6t_entry *e)
{
struct xt_entry_target *t;
struct xt_entry_match *ematch;
/* Cleanup all matches */
xt_ematch_foreach(ematch, e)
module_put(ematch->u.kernel.match->me);
t = compat_ip6t_get_target(e);
module_put(t->u.kernel.target->me);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 37 | 60.66% | 1 | 20.00% |
jan engelhardt | jan engelhardt | 24 | 39.34% | 4 | 80.00% |
| Total | 61 | 100.00% | 5 | 100.00% |
static int
check_compat_entry_size_and_hooks(struct compat_ip6t_entry *e,
struct xt_table_info *newinfo,
unsigned int *size,
const unsigned char *base,
const unsigned char *limit)
{
struct xt_entry_match *ematch;
struct xt_entry_target *t;
struct xt_target *target;
unsigned int entry_offset;
unsigned int j;
int ret, off;
if ((unsigned long)e % __alignof__(struct compat_ip6t_entry) != 0 ||
(unsigned char *)e + sizeof(struct compat_ip6t_entry) >= limit ||
(unsigned char *)e + e->next_offset > limit)
return -EINVAL;
if (e->next_offset < sizeof(struct compat_ip6t_entry) +
sizeof(struct compat_xt_entry_target))
return -EINVAL;
if (!ip6_checkentry(&e->ipv6))
return -EINVAL;
ret = xt_compat_check_entry_offsets(e, e->elems,
e->target_offset, e->next_offset);
if (ret)
return ret;
off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry);
entry_offset = (void *)e - (void *)base;
j = 0;
xt_ematch_foreach(ematch, e) {
ret = compat_find_calc_match(ematch, &e->ipv6, &off);
if (ret != 0)
goto release_matches;
++j;
}
t = compat_ip6t_get_target(e);
target = xt_request_find_target(NFPROTO_IPV6, t->u.user.name,
t->u.user.revision);
if (IS_ERR(target)) {
ret = PTR_ERR(target);
goto release_matches;
}
t->u.kernel.target = target;
off += xt_compat_target_offset(target);
*size += off;
ret = xt_compat_add_offset(AF_INET6, entry_offset, off);
if (ret)
goto out;
return 0;
out:
module_put(t->u.kernel.target->me);
release_matches:
xt_ematch_foreach(ematch, e) {
if (j-- == 0)
break;
module_put(ematch->u.kernel.match->me);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 290 | 76.32% | 2 | 18.18% |
jan engelhardt | jan engelhardt | 49 | 12.89% | 5 | 45.45% |
florian westphal | florian westphal | 41 | 10.79% | 4 | 36.36% |
| Total | 380 | 100.00% | 11 | 100.00% |
static void
compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
unsigned int *size,
struct xt_table_info *newinfo, unsigned char *base)
{
struct xt_entry_target *t;
struct ip6t_entry *de;
unsigned int origsize;
int h;
struct xt_entry_match *ematch;
origsize = *size;
de = (struct ip6t_entry *)*dstptr;
memcpy(de, e, sizeof(struct ip6t_entry));
memcpy(&de->counters, &e->counters, sizeof(e->counters));
*dstptr += sizeof(struct ip6t_entry);
*size += sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry);
xt_ematch_foreach(ematch, e)
xt_compat_match_from_user(ematch, dstptr, size);
de->target_offset = e->target_offset - (origsize - *size);
t = compat_ip6t_get_target(e);
xt_compat_target_from_user(t, dstptr, size);
de->next_offset = e->next_offset - (origsize - *size);
for (h = 0; h < NF_INET_NUMHOOKS; h++) {
if ((unsigned char *)de - base < newinfo->hook_entry[h])
newinfo->hook_entry[h] -= origsize - *size;
if ((unsigned char *)de - base < newinfo->underflow[h])
newinfo->underflow[h] -= origsize - *size;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 248 | 95.02% | 1 | 25.00% |
jan engelhardt | jan engelhardt | 12 | 4.60% | 2 | 50.00% |
florian westphal | florian westphal | 1 | 0.38% | 1 | 25.00% |
| Total | 261 | 100.00% | 4 | 100.00% |
static int
translate_compat_table(struct net *net,
struct xt_table_info **pinfo,
void **pentry0,
const struct compat_ip6t_replace *compatr)
{
unsigned int i, j;
struct xt_table_info *newinfo, *info;
void *pos, *entry0, *entry1;
struct compat_ip6t_entry *iter0;
struct ip6t_replace repl;
unsigned int size;
int ret = 0;
info = *pinfo;
entry0 = *pentry0;
size = compatr->size;
info->number = compatr->num_entries;
j = 0;
xt_compat_lock(AF_INET6);
xt_compat_init_offsets(AF_INET6, compatr->num_entries);
/* Walk through entries, checking offsets. */
xt_entry_foreach(iter0, entry0, compatr->size) {
ret = check_compat_entry_size_and_hooks(iter0, info, &size,
entry0,
entry0 + compatr->size);
if (ret != 0)
goto out_unlock;
++j;
}
ret = -EINVAL;
if (j != compatr->num_entries)
goto out_unlock;
ret = -ENOMEM;
newinfo = xt_alloc_table_info(size);
if (!newinfo)
goto out_unlock;
newinfo->number = compatr->num_entries;
for (i = 0; i < NF_INET_NUMHOOKS; i++) {
newinfo->hook_entry[i] = compatr->hook_entry[i];
newinfo->underflow[i] = compatr->underflow[i];
}
entry1 = newinfo->entries;
pos = entry1;
size = compatr->size;
xt_entry_foreach(iter0, entry0, compatr->size)
compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
/* all module references in entry0 are now gone. */
xt_compat_flush_offsets(AF_INET6);
xt_compat_unlock(AF_INET6);
memcpy(&repl, compatr, sizeof(*compatr));
for (i = 0; i < NF_INET_NUMHOOKS; i++) {
repl.hook_entry[i] = newinfo->hook_entry[i];
repl.underflow[i] = newinfo->underflow[i];
}
repl.num_counters = 0;
repl.counters = NULL;
repl.size = newinfo->size;
ret = translate_table(net, newinfo, entry1, &repl);
if (ret)
goto free_newinfo;
*pinfo = newinfo;
*pentry0 = entry1;
xt_free_table_info(info);
return 0;
free_newinfo:
xt_free_table_info(newinfo);
return ret;
out_unlock:
xt_compat_flush_offsets(AF_INET6);
xt_compat_unlock(AF_INET6);
xt_entry_foreach(iter0, entry0, compatr->size) {
if (j-- == 0)
break;
compat_release_entry(iter0);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 209 | 45.83% | 2 | 16.67% |
florian westphal | florian westphal | 180 | 39.47% | 3 | 25.00% |
jan engelhardt | jan engelhardt | 56 | 12.28% | 5 | 41.67% |
eric dumazet | eric dumazet | 6 | 1.32% | 1 | 8.33% |
alexey dobriyan | alexey dobriyan | 5 | 1.10% | 1 | 8.33% |
| Total | 456 | 100.00% | 12 | 100.00% |
static int
compat_do_replace(struct net *net, void __user *user, unsigned int len)
{
int ret;
struct compat_ip6t_replace tmp;
struct xt_table_info *newinfo;
void *loc_cpu_entry;
struct ip6t_entry *iter;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
if (tmp.num_counters >= INT_MAX / sizeof(struct xt_counters))
return -ENOMEM;
if (tmp.num_counters == 0)
return -EINVAL;
tmp.name[sizeof(tmp.name)-1] = 0;
newinfo = xt_alloc_table_info(tmp.size);
if (!newinfo)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
ret = translate_compat_table(net, &newinfo, &loc_cpu_entry, &tmp);
if (ret != 0)
goto free_newinfo;
ret = __do_replace(net, tmp.name, tmp.valid_hooks, newinfo,
tmp.num_counters, compat_ptr(tmp.counters));
if (ret)
goto free_newinfo_untrans;
return 0;
free_newinfo_untrans:
xt_entry_foreach(iter, loc_cpu_entry, newinfo->size)
cleanup_entry(iter, net);
free_newinfo:
xt_free_table_info(newinfo);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 166 | 65.61% | 1 | 10.00% |
harald welte | harald welte | 27 | 10.67% | 1 | 10.00% |
vasiliy kulikov | vasiliy kulikov | 16 | 6.32% | 1 | 10.00% |
jan engelhardt | jan engelhardt | 13 | 5.14% | 2 | 20.00% |
dave jones | dave jones | 12 | 4.74% | 1 | 10.00% |
alexey dobriyan | alexey dobriyan | 10 | 3.95% | 2 | 20.00% |
pre-git | pre-git | 8 | 3.16% | 1 | 10.00% |
florian westphal | florian westphal | 1 | 0.40% | 1 | 10.00% |
| Total | 253 | 100.00% | 10 | 100.00% |
static int
compat_do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user,
unsigned int len)
{
int ret;
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;
switch (cmd) {
case IP6T_SO_SET_REPLACE:
ret = compat_do_replace(sock_net(sk), user, len);
break;
case IP6T_SO_SET_ADD_COUNTERS:
ret = do_add_counters(sock_net(sk), user, len, 1);
break;
default:
ret = -EINVAL;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 71 | 72.45% | 1 | 16.67% |
eric w. biederman | eric w. biederman | 8 | 8.16% | 1 | 16.67% |
hideaki yoshifuji | hideaki yoshifuji | 6 | 6.12% | 1 | 16.67% |
pre-git | pre-git | 6 | 6.12% | 1 | 16.67% |
alexey dobriyan | alexey dobriyan | 4 | 4.08% | 1 | 16.67% |
harald welte | harald welte | 3 | 3.06% | 1 | 16.67% |
| Total | 98 | 100.00% | 6 | 100.00% |
struct compat_ip6t_get_entries {
char name[XT_TABLE_MAXNAMELEN];
compat_uint_t size;
struct compat_ip6t_entry entrytable[0];
};
static int
compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table,
void __user *userptr)
{
struct xt_counters *counters;
const struct xt_table_info *private = table->private;
void __user *pos;
unsigned int size;
int ret = 0;
unsigned int i = 0;
struct ip6t_entry *iter;
counters = alloc_counters(table);
if (IS_ERR(counters))
return PTR_ERR(counters);
pos = userptr;
size = total_size;
xt_entry_foreach(iter, private->entries, total_size) {
ret = compat_copy_entry_to_user(iter, &pos,
&size, counters, i++);
if (ret != 0)
break;
}
vfree(counters);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 92 | 70.23% | 1 | 16.67% |
jan engelhardt | jan engelhardt | 24 | 18.32% | 3 | 50.00% |
harald welte | harald welte | 14 | 10.69% | 1 | 16.67% |
florian westphal | florian westphal | 1 | 0.76% | 1 | 16.67% |
| Total | 131 | 100.00% | 6 | 100.00% |
static int
compat_get_entries(struct net *net, struct compat_ip6t_get_entries __user *uptr,
int *len)
{
int ret;
struct compat_ip6t_get_entries get;
struct xt_table *t;
if (*len < sizeof(get))
return -EINVAL;
if (copy_from_user(&get, uptr, sizeof(get)) != 0)
return -EFAULT;
if (*len != sizeof(struct compat_ip6t_get_entries) + get.size)
return -EINVAL;
get.name[sizeof(get.name) - 1] = '\0';
xt_compat_lock(AF_INET6);
t = xt_find_table_lock(net, AF_INET6, get.name);
if (!IS_ERR_OR_NULL(t)) {
const struct xt_table_info *private = t->private;
struct xt_table_info info;
ret = compat_table_info(private, &info);
if (!ret && get.size == info.size)
ret = compat_copy_entries_to_user(private->size,
t, uptr->entrytable);
else if (!ret)
ret = -EAGAIN;
xt_compat_flush_offsets(AF_INET6);
module_put(t->me);
xt_table_unlock(t);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
xt_compat_unlock(AF_INET6);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 120 | 51.72% | 3 | 23.08% |
harald welte | harald welte | 59 | 25.43% | 2 | 15.38% |
pre-git | pre-git | 25 | 10.78% | 1 | 7.69% |
pablo neira ayuso | pablo neira ayuso | 16 | 6.90% | 1 | 7.69% |
alexey dobriyan | alexey dobriyan | 7 | 3.02% | 2 | 15.38% |
eric dumazet | eric dumazet | 2 | 0.86% | 1 | 7.69% |
hideaki yoshifuji | hideaki yoshifuji | 1 | 0.43% | 1 | 7.69% |
jan engelhardt | jan engelhardt | 1 | 0.43% | 1 | 7.69% |
al viro | al viro | 1 | 0.43% | 1 | 7.69% |
| Total | 232 | 100.00% | 13 | 100.00% |
static int do_ip6t_get_ctl(struct sock *, int, void __user *, int *);
static int
compat_do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
{
int ret;
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;
switch (cmd) {
case IP6T_SO_GET_INFO:
ret = get_info(sock_net(sk), user, len, 1);
break;
case IP6T_SO_GET_ENTRIES:
ret = compat_get_entries(sock_net(sk), user, len);
break;
default:
ret = do_ip6t_get_ctl(sk, cmd, user, len);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 67 | 63.21% | 1 | 16.67% |
harald welte | harald welte | 15 | 14.15% | 1 | 16.67% |
eric w. biederman | eric w. biederman | 8 | 7.55% | 1 | 16.67% |
hideaki yoshifuji | hideaki yoshifuji | 6 | 5.66% | 1 | 16.67% |
eric dumazet | eric dumazet | 6 | 5.66% | 1 | 16.67% |
alexey dobriyan | alexey dobriyan | 4 | 3.77% | 1 | 16.67% |
| Total | 106 | 100.00% | 6 | 100.00% |
#endif
static int
do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
{
int ret;
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;
switch (cmd) {
case IP6T_SO_SET_REPLACE:
ret = do_replace(sock_net(sk), user, len);
break;
case IP6T_SO_SET_ADD_COUNTERS:
ret = do_add_counters(sock_net(sk), user, len, 0);
break;
default:
ret = -EINVAL;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 47 | 47.96% | 1 | 16.67% |
eric dumazet | eric dumazet | 31 | 31.63% | 1 | 16.67% |
eric w. biederman | eric w. biederman | 8 | 8.16% | 1 | 16.67% |
hideaki yoshifuji | hideaki yoshifuji | 6 | 6.12% | 1 | 16.67% |
alexey dobriyan | alexey dobriyan | 4 | 4.08% | 1 | 16.67% |
patrick mchardy | patrick mchardy | 2 | 2.04% | 1 | 16.67% |
| Total | 98 | 100.00% | 6 | 100.00% |
static int
do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
{
int ret;
if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;
switch (cmd) {
case IP6T_SO_GET_INFO:
ret = get_info(sock_net(sk), user, len, 0);
break;
case IP6T_SO_GET_ENTRIES:
ret = get_entries(sock_net(sk), user, len);
break;
case IP6T_SO_GET_REVISION_MATCH:
case IP6T_SO_GET_REVISION_TARGET: {
struct xt_get_revision rev;
int target;
if (*len != sizeof(rev)) {
ret = -EINVAL;
break;
}
if (copy_from_user(&rev, user, sizeof(rev)) != 0) {
ret = -EFAULT;
break;
}
rev.name[sizeof(rev.name)-1] = 0;
if (cmd == IP6T_SO_GET_REVISION_TARGET)
target = 1;
else
target = 0;
try_then_request_module(xt_find_revision(AF_INET6, rev.name,
rev.revision,
target, &ret),
"ip6t_%s", rev.name);
break;
}
default:
ret = -EINVAL;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 121 | 56.28% | 1 | 7.14% |
pre-git | pre-git | 39 | 18.14% | 1 | 7.14% |
vasiliy kulikov | vasiliy kulikov | 16 | 7.44% | 1 | 7.14% |
eric w. biederman | eric w. biederman | 8 | 3.72% | 1 | 7.14% |
art haas | art haas | 8 | 3.72% | 1 | 7.14% |
rusty russell | rusty russell | 6 | 2.79% | 1 | 7.14% |
hideaki yoshifuji | hideaki yoshifuji | 6 | 2.79% | 1 | 7.14% |
alexey dobriyan | alexey dobriyan | 4 | 1.86% | 1 | 7.14% |
patrick mchardy | patrick mchardy | 4 | 1.86% | 3 | 21.43% |
al viro | al viro | 1 | 0.47% | 1 | 7.14% |
jan engelhardt | jan engelhardt | 1 | 0.47% | 1 | 7.14% |
eric dumazet | eric dumazet | 1 | 0.47% | 1 | 7.14% |
| Total | 215 | 100.00% | 14 | 100.00% |
static void __ip6t_unregister_table(struct net *net, struct xt_table *table)
{
struct xt_table_info *private;
void *loc_cpu_entry;
struct module *table_owner = table->me;
struct ip6t_entry *iter;
private = xt_unregister_table(table);
/* Decrease module usage counts and free resources */
loc_cpu_entry = private->entries;
xt_entry_foreach(iter, loc_cpu_entry, private->size)
cleanup_entry(iter, net);
if (private->number > private->initial_entries)
module_put(table_owner);
xt_free_table_info(private);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
florian westphal | florian westphal | 88 | 100.00% | 1 | 100.00% |
| Total | 88 | 100.00% | 1 | 100.00% |
int ip6t_register_table(struct net *net, const struct xt_table *table,
const struct ip6t_replace *repl,
const struct nf_hook_ops *ops,
struct xt_table **res)
{
int ret;
struct xt_table_info *newinfo;
struct xt_table_info bootstrap = {0};
void *loc_cpu_entry;
struct xt_table *new_table;
newinfo = xt_alloc_table_info(repl->size);
if (!newinfo)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
memcpy(loc_cpu_entry, repl->entries, repl->size);
ret = translate_table(net, newinfo, loc_cpu_entry, repl);
if (ret != 0)
goto out_free;
new_table = xt_register_table(net, table, &bootstrap, newinfo);
if (IS_ERR(new_table)) {
ret = PTR_ERR(new_table);
goto out_free;
}
/* set res now, will see skbs right after nf_register_net_hooks */
WRITE_ONCE(*res, new_table);
ret = nf_register_net_hooks(net, ops, hweight32(table->valid_hooks));
if (ret != 0) {
__ip6t_unregister_table(net, new_table);
*res = NULL;
}
return ret;
out_free:
xt_free_table_info(newinfo);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 87 | 41.63% | 2 | 16.67% |
florian westphal | florian westphal | 61 | 29.19% | 2 | 16.67% |
alexey dobriyan | alexey dobriyan | 38 | 18.18% | 5 | 41.67% |
pre-git | pre-git | 18 | 8.61% | 1 | 8.33% |
patrick mchardy | patrick mchardy | 4 | 1.91% | 1 | 8.33% |
jan engelhardt | jan engelhardt | 1 | 0.48% | 1 | 8.33% |
| Total | 209 | 100.00% | 12 | 100.00% |
void ip6t_unregister_table(struct net *net, struct xt_table *table,
const struct nf_hook_ops *ops)
{
nf_unregister_net_hooks(net, ops, hweight32(table->valid_hooks));
__ip6t_unregister_table(net, table);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
florian westphal | florian westphal | 17 | 40.48% | 2 | 28.57% |
harald welte | harald welte | 8 | 19.05% | 1 | 14.29% |
alexey dobriyan | alexey dobriyan | 8 | 19.05% | 2 | 28.57% |
patrick mchardy | patrick mchardy | 8 | 19.05% | 1 | 14.29% |
jan engelhardt | jan engelhardt | 1 | 2.38% | 1 | 14.29% |
| Total | 42 | 100.00% | 7 | 100.00% |
/* Returns 1 if the type and code is matched by the range, 0 otherwise */
static inline bool
icmp6_type_code_match(u_int8_t test_type, u_int8_t min_code, u_int8_t max_code,
u_int8_t type, u_int8_t code,
bool invert)
{
return (type == test_type && code >= min_code && code <= max_code)
^ invert;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 28 | 66.67% | 1 | 33.33% |
pre-git | pre-git | 12 | 28.57% | 1 | 33.33% |
jan engelhardt | jan engelhardt | 2 | 4.76% | 1 | 33.33% |
| Total | 42 | 100.00% | 3 | 100.00% |
static bool
icmp6_match(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct icmp6hdr *ic;
struct icmp6hdr _icmph;
const struct ip6t_icmp *icmpinfo = par->matchinfo;
/* Must not be a fragment. */
if (par->fragoff != 0)
return false;
ic = skb_header_pointer(skb, par->thoff, sizeof(_icmph), &_icmph);
if (ic == NULL) {
/* We've been asked to examine this packet, and we
* can't. Hence, no choice but to drop.
*/
par->hotdrop = true;
return false;
}
return icmp6_type_code_match(icmpinfo->type,
icmpinfo->code[0],
icmpinfo->code[1],
ic->icmp6_type, ic->icmp6_code,
!!(icmpinfo->invflags&IP6T_ICMP_INV));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 100 | 79.37% | 2 | 25.00% |
jan engelhardt | jan engelhardt | 23 | 18.25% | 5 | 62.50% |
patrick mchardy | patrick mchardy | 3 | 2.38% | 1 | 12.50% |
| Total | 126 | 100.00% | 8 | 100.00% |
/* Called when user tries to insert an entry of this type. */
static int icmp6_checkentry(const struct xt_mtchk_param *par)
{
const struct ip6t_icmp *icmpinfo = par->matchinfo;
/* Must specify no unknown invflags */
return (icmpinfo->invflags & ~IP6T_ICMP_INV) ? -EINVAL : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
harald welte | harald welte | 26 | 68.42% | 2 | 28.57% |
jan engelhardt | jan engelhardt | 10 | 26.32% | 3 | 42.86% |
patrick mchardy | patrick mchardy | 2 | 5.26% | 2 | 28.57% |
| Total | 38 | 100.00% | 7 | 100.00% |
/* The built-in targets: standard (NULL) and error. */
static struct xt_target ip6t_builtin_tg[] __read_mostly = {
{
.name = XT_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = NFPROTO_IPV6,
#ifdef CONFIG_COMPAT
.compatsize = sizeof(compat_int_t),
.compat_from_user = compat_standard_from_user,
.compat_to_user = compat_standard_to_user,
#endif
},
{
.name = XT_ERROR_TARGET,
.target = ip6t_error,
.targetsize = XT_FUNCTION_MAXNAMELEN,
.family = NFPROTO_IPV6,
},
};
static struct nf_sockopt_ops ip6t_sockopts = {
.pf = PF_INET6,
.set_optmin = IP6T_BASE_CTL,
.set_optmax = IP6T_SO_SET_MAX+1,
.set = do_ip6t_set_ctl,
#ifdef CONFIG_COMPAT
.compat_set = compat_do_ip6t_set_ctl,
#endif
.get_optmin = IP6T_BASE_CTL,
.get_optmax = IP6T_SO_GET_MAX+1,
.get = do_ip6t_get_ctl,
#ifdef CONFIG_COMPAT
.compat_get = compat_do_ip6t_get_ctl,
#endif
.owner = THIS_MODULE,
};
static struct xt_match ip6t_builtin_mt[] __read_mostly = {
{
.name = "icmp6",
.match = icmp6_match,
.matchsize = sizeof(struct ip6t_icmp),
.checkentry = icmp6_checkentry,
.proto = IPPROTO_ICMPV6,
.family = NFPROTO_IPV6,
},
};
static int __net_init ip6_tables_net_init(struct net *net)
{
return xt_proto_init(net, NFPROTO_IPV6);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
alexey dobriyan | alexey dobriyan | 19 | 95.00% | 1 | 50.00% |
jan engelhardt | jan engelhardt | 1 | 5.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static void __net_exit ip6_tables_net_exit(struct net *net)
{
xt_proto_fini(net, NFPROTO_IPV6);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
alexey dobriyan | alexey dobriyan | 18 | 94.74% | 1 | 50.00% |
jan engelhardt | jan engelhardt | 1 | 5.26% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
static struct pernet_operations ip6_tables_net_ops = {
.init = ip6_tables_net_init,
.exit = ip6_tables_net_exit,
};
static int __init ip6_tables_init(void)
{
int ret;
ret = register_pernet_subsys(&ip6_tables_net_ops);
if (ret < 0)
goto err1;
/* No one else will be downing sem now, so we won't sleep */
ret = xt_register_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg));
if (ret < 0)
goto err2;
ret = xt_register_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt));
if (ret < 0)
goto err4;
/* Register setsockopt */
ret = nf_register_sockopt(&ip6t_sockopts);
if (ret < 0)
goto err5;
pr_info("(C) 2000-2006 Netfilter Core Team\n");
return 0;
err5:
xt_unregister_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt));
err4:
xt_unregister_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg));
err2:
unregister_pernet_subsys(&ip6_tables_net_ops);
err1:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 52 | 38.52% | 1 | 14.29% |
pre-git | pre-git | 47 | 34.81% | 1 | 14.29% |
jan engelhardt | jan engelhardt | 28 | 20.74% | 2 | 28.57% |
alexey dobriyan | alexey dobriyan | 6 | 4.44% | 1 | 14.29% |
andrew morton | andrew morton | 1 | 0.74% | 1 | 14.29% |
lucas de marchi | lucas de marchi | 1 | 0.74% | 1 | 14.29% |
| Total | 135 | 100.00% | 7 | 100.00% |
static void __exit ip6_tables_fini(void)
{
nf_unregister_sockopt(&ip6t_sockopts);
xt_unregister_matches(ip6t_builtin_mt, ARRAY_SIZE(ip6t_builtin_mt));
xt_unregister_targets(ip6t_builtin_tg, ARRAY_SIZE(ip6t_builtin_tg));
unregister_pernet_subsys(&ip6_tables_net_ops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 17 | 41.46% | 1 | 20.00% |
jan engelhardt | jan engelhardt | 13 | 31.71% | 1 | 20.00% |
harald welte | harald welte | 7 | 17.07% | 1 | 20.00% |
alexey dobriyan | alexey dobriyan | 3 | 7.32% | 1 | 20.00% |
andrew morton | andrew morton | 1 | 2.44% | 1 | 20.00% |
| Total | 41 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(ip6t_register_table);
EXPORT_SYMBOL(ip6t_unregister_table);
EXPORT_SYMBOL(ip6t_do_table);
module_init(ip6_tables_init);
module_exit(ip6_tables_fini);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
patrick mchardy | patrick mchardy | 3424 | 34.40% | 28 | 16.28% |
harald welte | harald welte | 1950 | 19.59% | 4 | 2.33% |
jan engelhardt | jan engelhardt | 1313 | 13.19% | 47 | 27.33% |
pre-git | pre-git | 1131 | 11.36% | 1 | 0.58% |
florian westphal | florian westphal | 777 | 7.81% | 21 | 12.21% |
jozsef kadlecsik | jozsef kadlecsik | 461 | 4.63% | 1 | 0.58% |
alexey dobriyan | alexey dobriyan | 224 | 2.25% | 9 | 5.23% |
eric dumazet | eric dumazet | 165 | 1.66% | 11 | 6.40% |
pablo neira ayuso | pablo neira ayuso | 68 | 0.68% | 5 | 2.91% |
eric w. biederman | eric w. biederman | 57 | 0.57% | 4 | 2.33% |
vasiliy kulikov | vasiliy kulikov | 48 | 0.48% | 1 | 0.58% |
dmitry mishin | dmitry mishin | 36 | 0.36% | 2 | 1.16% |
yasuyuki kozakai | yasuyuki kozakai | 33 | 0.33% | 1 | 0.58% |
stephen hemminger | stephen hemminger | 32 | 0.32% | 3 | 1.74% |
david s. miller | david s. miller | 31 | 0.31% | 3 | 1.74% |
hideaki yoshifuji | hideaki yoshifuji | 29 | 0.29% | 2 | 1.16% |
joe perches | joe perches | 25 | 0.25% | 3 | 1.74% |
dave jones | dave jones | 24 | 0.24% | 1 | 0.58% |
andras kis-szabo | andras kis-szabo | 21 | 0.21% | 1 | 0.58% |
linus torvalds | linus torvalds | 16 | 0.16% | 2 | 1.16% |
hans schillstrom | hans schillstrom | 8 | 0.08% | 1 | 0.58% |
art haas | art haas | 8 | 0.08% | 1 | 0.58% |
herbert xu | herbert xu | 8 | 0.08% | 1 | 0.58% |
rusty russell | rusty russell | 8 | 0.08% | 2 | 1.16% |
thomas graf | thomas graf | 7 | 0.07% | 1 | 0.58% |
kirill korotaev | kirill korotaev | 7 | 0.07% | 1 | 0.58% |
randy dunlap | randy dunlap | 6 | 0.06% | 2 | 1.16% |
arnaldo carvalho de melo | arnaldo carvalho de melo | 6 | 0.06% | 2 | 1.16% |
al viro | al viro | 6 | 0.06% | 2 | 1.16% |
denys vlasenko | denys vlasenko | 5 | 0.05% | 1 | 0.58% |
neil horman | neil horman | 5 | 0.05% | 1 | 0.58% |
andrew morton | andrew morton | 4 | 0.04% | 1 | 0.58% |
will deacon | will deacon | 4 | 0.04% | 1 | 0.58% |
gao feng | gao feng | 2 | 0.02% | 1 | 0.58% |
americo wang | americo wang | 2 | 0.02% | 1 | 0.58% |
ingo molnar | ingo molnar | 1 | 0.01% | 1 | 0.58% |
changli gao | changli gao | 1 | 0.01% | 1 | 0.58% |
lucas de marchi | lucas de marchi | 1 | 0.01% | 1 | 0.58% |
| Total | 9954 | 100.00% | 172 | 100.00% |
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