lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge branch 'master' of git://dev.medozas.de/linux

Browse Source
This commit is contained in:
Patrick McHardy
2009-06-02 13:44:56 +02:00
parent a17c859849 451853645f
commit 8cc848fa34
8 changed files with 289 additions and 246 deletions
Download Patch File Download Diff File Expand all files Collapse all files

121
net/ipv4/netfilter/arp_tables.c
View File

@ -231,6 +231,12 @@ static inline struct arpt_entry *get_entry(void *base, unsigned int offset)
return (struct arpt_entry *)(base + offset);
}
static inline __pure
struct arpt_entry *arpt_next_entry(const struct arpt_entry *entry)
{
return (void *)entry + entry->next_offset;
}
unsigned int arpt_do_table(struct sk_buff *skb,
unsigned int hook,
const struct net_device *in,
@ -267,67 +273,64 @@ unsigned int arpt_do_table(struct sk_buff *skb,
arp = arp_hdr(skb);
do {
if (arp_packet_match(arp, skb->dev, indev, outdev, &e->arp)) {
struct arpt_entry_target *t;
int hdr_len;
struct arpt_entry_target *t;
int hdr_len;
hdr_len = sizeof(*arp) + (2 * sizeof(struct in_addr)) +
(2 * skb->dev->addr_len);
ADD_COUNTER(e->counters, hdr_len, 1);
t = arpt_get_target(e);
/* Standard target? */
if (!t->u.kernel.target->target) {
int v;
v = ((struct arpt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
if (v != ARPT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
e = back;
back = get_entry(table_base,
back->comefrom);
continue;
}
if (table_base + v
!= (void *)e + e->next_offset) {
/* Save old back ptr in next entry */
struct arpt_entry *next
= (void *)e + e->next_offset;
next->comefrom =
(void *)back - table_base;
/* set back pointer to next entry */
back = next;
}
e = get_entry(table_base, v);
} else {
/* Targets which reenter must return
* abs. verdicts
*/
tgpar.target = t->u.kernel.target;
tgpar.targinfo = t->data;
verdict = t->u.kernel.target->target(skb,
&tgpar);
/* Target might have changed stuff. */
arp = arp_hdr(skb);
if (verdict == ARPT_CONTINUE)
e = (void *)e + e->next_offset;
else
/* Verdict */
break;
}
} else {
e = (void *)e + e->next_offset;
if (!arp_packet_match(arp, skb->dev, indev, outdev, &e->arp)) {
e = arpt_next_entry(e);
continue;
}
hdr_len = sizeof(*arp) + (2 * sizeof(struct in_addr)) +
(2 * skb->dev->addr_len);
ADD_COUNTER(e->counters, hdr_len, 1);
t = arpt_get_target(e);
/* Standard target? */
if (!t->u.kernel.target->target) {
int v;
v = ((struct arpt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
if (v != ARPT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
e = back;
back = get_entry(table_base, back->comefrom);
continue;
}
if (table_base + v
!= arpt_next_entry(e)) {
/* Save old back ptr in next entry */
struct arpt_entry *next = arpt_next_entry(e);
next->comefrom = (void *)back - table_base;
/* set back pointer to next entry */
back = next;
}
e = get_entry(table_base, v);
continue;
}
/* Targets which reenter must return
* abs. verdicts
*/
tgpar.target = t->u.kernel.target;
tgpar.targinfo = t->data;
verdict = t->u.kernel.target->target(skb, &tgpar);
/* Target might have changed stuff. */
arp = arp_hdr(skb);
if (verdict == ARPT_CONTINUE)
e = arpt_next_entry(e);
else
/* Verdict */
break;
} while (!hotdrop);
xt_info_rdunlock_bh();

2
net/ipv4/netfilter/ip_queue.c
View File

@ -596,7 +596,7 @@ static int __init ip_queue_init(void)
#ifdef CONFIG_SYSCTL
ipq_sysctl_header = register_sysctl_paths(net_ipv4_ctl_path, ipq_table);
#endif
status = nf_register_queue_handler(PF_INET, &nfqh);
status = nf_register_queue_handler(NFPROTO_IPV4, &nfqh);
if (status < 0) {
printk(KERN_ERR "ip_queue: failed to register queue handler\n");
goto cleanup_sysctl;

174
net/ipv4/netfilter/ip_tables.c
View File

@ -238,8 +238,8 @@ static struct nf_loginfo trace_loginfo = {
/* Mildly perf critical (only if packet tracing is on) */
static inline int
get_chainname_rulenum(struct ipt_entry *s, struct ipt_entry *e,
char *hookname, char **chainname,
char **comment, unsigned int *rulenum)
const char *hookname, const char **chainname,
const char **comment, unsigned int *rulenum)
{
struct ipt_standard_target *t = (void *)ipt_get_target(s);
@ -257,8 +257,8 @@ get_chainname_rulenum(struct ipt_entry *s, struct ipt_entry *e,
&& unconditional(&s->ip)) {
/* Tail of chains: STANDARD target (return/policy) */
*comment = *chainname == hookname
? (char *)comments[NF_IP_TRACE_COMMENT_POLICY]
: (char *)comments[NF_IP_TRACE_COMMENT_RETURN];
? comments[NF_IP_TRACE_COMMENT_POLICY]
: comments[NF_IP_TRACE_COMMENT_RETURN];
}
return 1;
} else
@ -277,14 +277,14 @@ static void trace_packet(struct sk_buff *skb,
{
void *table_base;
const struct ipt_entry *root;
char *hookname, *chainname, *comment;
const char *hookname, *chainname, *comment;
unsigned int rulenum = 0;
table_base = (void *)private->entries[smp_processor_id()];
table_base = private->entries[smp_processor_id()];
root = get_entry(table_base, private->hook_entry[hook]);
hookname = chainname = (char *)hooknames[hook];
comment = (char *)comments[NF_IP_TRACE_COMMENT_RULE];
hookname = chainname = hooknames[hook];
comment = comments[NF_IP_TRACE_COMMENT_RULE];
IPT_ENTRY_ITERATE(root,
private->size - private->hook_entry[hook],
@ -297,6 +297,12 @@ static void trace_packet(struct sk_buff *skb,
}
#endif
static inline __pure
struct ipt_entry *ipt_next_entry(const struct ipt_entry *entry)
{
return (void *)entry + entry->next_offset;
}
/* Returns one of the generic firewall policies, like NF_ACCEPT. */
unsigned int
ipt_do_table(struct sk_buff *skb,
@ -305,6 +311,8 @@ ipt_do_table(struct sk_buff *skb,
const struct net_device *out,
struct xt_table *table)
{
#define tb_comefrom ((struct ipt_entry *)table_base)->comefrom
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
const struct iphdr *ip;
u_int16_t datalen;
@ -348,92 +356,84 @@ ipt_do_table(struct sk_buff *skb,
back = get_entry(table_base, private->underflow[hook]);
do {
struct ipt_entry_target *t;
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
if (ip_packet_match(ip, indev, outdev,
&e->ip, mtpar.fragoff)) {
struct ipt_entry_target *t;
if (!ip_packet_match(ip, indev, outdev,
&e->ip, mtpar.fragoff) ||
IPT_MATCH_ITERATE(e, do_match, skb, &mtpar) != 0) {
e = ipt_next_entry(e);
continue;
}
if (IPT_MATCH_ITERATE(e, do_match, skb, &mtpar) != 0)
goto no_match;
ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1);
ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1);
t = ipt_get_target(e);
IP_NF_ASSERT(t->u.kernel.target);
t = ipt_get_target(e);
IP_NF_ASSERT(t->u.kernel.target);
#if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
defined(CONFIG_NETFILTER_XT_TARGET_TRACE_MODULE)
/* The packet is traced: log it */
if (unlikely(skb->nf_trace))
trace_packet(skb, hook, in, out,
table->name, private, e);
/* The packet is traced: log it */
if (unlikely(skb->nf_trace))
trace_packet(skb, hook, in, out,
table->name, private, e);
#endif
/* Standard target? */
if (!t->u.kernel.target->target) {
int v;
/* Standard target? */
if (!t->u.kernel.target->target) {
int v;
v = ((struct ipt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
if (v != IPT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
e = back;
back = get_entry(table_base,
back->comefrom);
continue;
}
if (table_base + v != (void *)e + e->next_offset
&& !(e->ip.flags & IPT_F_GOTO)) {
/* Save old back ptr in next entry */
struct ipt_entry *next
= (void *)e + e->next_offset;
next->comefrom
= (void *)back - table_base;
/* set back pointer to next entry */
back = next;
}
e = get_entry(table_base, v);
} else {
/* Targets which reenter must return
abs. verdicts */
tgpar.target = t->u.kernel.target;
tgpar.targinfo = t->data;
#ifdef CONFIG_NETFILTER_DEBUG
((struct ipt_entry *)table_base)->comefrom
= 0xeeeeeeec;
#endif
verdict = t->u.kernel.target->target(skb,
&tgpar);
#ifdef CONFIG_NETFILTER_DEBUG
if (((struct ipt_entry *)table_base)->comefrom
!= 0xeeeeeeec
&& verdict == IPT_CONTINUE) {
printk("Target %s reentered!\n",
t->u.kernel.target->name);
verdict = NF_DROP;
}
((struct ipt_entry *)table_base)->comefrom
= 0x57acc001;
#endif
/* Target might have changed stuff. */
ip = ip_hdr(skb);
datalen = skb->len - ip->ihl * 4;
if (verdict == IPT_CONTINUE)
e = (void *)e + e->next_offset;
else
/* Verdict */
v = ((struct ipt_standard_target *)t)->verdict;
if (v < 0) {
/* Pop from stack? */
if (v != IPT_RETURN) {
verdict = (unsigned)(-v) - 1;
break;
}
e = back;
back = get_entry(table_base, back->comefrom);
continue;
}
if (table_base + v != ipt_next_entry(e)
&& !(e->ip.flags & IPT_F_GOTO)) {
/* Save old back ptr in next entry */
struct ipt_entry *next = ipt_next_entry(e);
next->comefrom = (void *)back - table_base;
/* set back pointer to next entry */
back = next;
}
} else {
no_match:
e = (void *)e + e->next_offset;
e = get_entry(table_base, v);
continue;
}
/* Targets which reenter must return
abs. verdicts */
tgpar.target = t->u.kernel.target;
tgpar.targinfo = t->data;
#ifdef CONFIG_NETFILTER_DEBUG
tb_comefrom = 0xeeeeeeec;
#endif
verdict = t->u.kernel.target->target(skb, &tgpar);
#ifdef CONFIG_NETFILTER_DEBUG
if (comefrom != 0xeeeeeeec && verdict == IPT_CONTINUE) {
printk("Target %s reentered!\n",
t->u.kernel.target->name);
verdict = NF_DROP;
}
tb_comefrom = 0x57acc001;
#endif
/* Target might have changed stuff. */
ip = ip_hdr(skb);
datalen = skb->len - ip->ihl * 4;
if (verdict == IPT_CONTINUE)
e = ipt_next_entry(e);
else
/* Verdict */
break;
} while (!hotdrop);
xt_info_rdunlock_bh();
@ -444,6 +444,8 @@ ipt_do_table(struct sk_buff *skb,
return NF_DROP;
else return verdict;
#endif
#undef tb_comefrom
}
/* Figures out from what hook each rule can be called: returns 0 if
@ -2158,7 +2160,7 @@ static bool icmp_checkentry(const struct xt_mtchk_param *par)
static struct xt_target ipt_standard_target __read_mostly = {
.name = IPT_STANDARD_TARGET,
.targetsize = sizeof(int),
.family = AF_INET,
.family = NFPROTO_IPV4,
#ifdef CONFIG_COMPAT
.compatsize = sizeof(compat_int_t),
.compat_from_user = compat_standard_from_user,
@ -2170,7 +2172,7 @@ static struct xt_target ipt_error_target __read_mostly = {
.name = IPT_ERROR_TARGET,
.target = ipt_error,
.targetsize = IPT_FUNCTION_MAXNAMELEN,
.family = AF_INET,
.family = NFPROTO_IPV4,
};
static struct nf_sockopt_ops ipt_sockopts = {
@ -2196,17 +2198,17 @@ static struct xt_match icmp_matchstruct __read_mostly = {
.matchsize = sizeof(struct ipt_icmp),
.checkentry = icmp_checkentry,
.proto = IPPROTO_ICMP,
.family = AF_INET,
.family = NFPROTO_IPV4,
};
static int __net_init ip_tables_net_init(struct net *net)
{
return xt_proto_init(net, AF_INET);
return xt_proto_init(net, NFPROTO_IPV4);
}
static void __net_exit ip_tables_net_exit(struct net *net)
{
xt_proto_fini(net, AF_INET);
xt_proto_fini(net, NFPROTO_IPV4);
}
static struct pernet_operations ip_tables_net_ops = {