do { \
if (!(x)) \
printk("IP_NF_ASSERT: %s:%s:%u\n", \
- __FUNCTION__, __FILE__, __LINE__); \
+ __func__, __FILE__, __LINE__); \
} while(0)
#else
#define IP_NF_ASSERT(x)
/* Performance critical - called for every packet */
static inline bool
-do_match(struct ipt_entry_match *m,
- const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- int offset,
- bool *hotdrop)
+do_match(struct ipt_entry_match *m, const struct sk_buff *skb,
+ struct xt_match_param *par)
{
+ par->match = m->u.kernel.match;
+ par->matchinfo = m->data;
+
/* Stop iteration if it doesn't match */
- if (!m->u.kernel.match->match(skb, in, out, m->u.kernel.match, m->data,
- offset, ip_hdrlen(skb), hotdrop))
+ if (!m->u.kernel.match->match(skb, par))
return true;
else
return false;
struct ipt_entry *e)
{
void *table_base;
- struct ipt_entry *root;
+ const struct ipt_entry *root;
char *hookname, *chainname, *comment;
unsigned int rulenum = 0;
struct xt_table *table)
{
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
- u_int16_t offset;
- struct iphdr *ip;
+ const struct iphdr *ip;
u_int16_t datalen;
bool hotdrop = false;
/* Initializing verdict to NF_DROP keeps gcc happy. */
void *table_base;
struct ipt_entry *e, *back;
struct xt_table_info *private;
+ struct xt_match_param mtpar;
/* Initialization */
ip = ip_hdr(skb);
* 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. */
- offset = ntohs(ip->frag_off) & IP_OFFSET;
+ mtpar.fragoff = ntohs(ip->frag_off) & IP_OFFSET;
+ mtpar.thoff = ip_hdrlen(skb);
+ mtpar.hotdrop = &hotdrop;
+ mtpar.in = in;
+ mtpar.out = out;
read_lock_bh(&table->lock);
IP_NF_ASSERT(table->valid_hooks & (1 << hook));
do {
IP_NF_ASSERT(e);
IP_NF_ASSERT(back);
- if (ip_packet_match(ip, indev, outdev, &e->ip, offset)) {
+ if (ip_packet_match(ip, indev, outdev,
+ &e->ip, mtpar.fragoff)) {
struct ipt_entry_target *t;
- if (IPT_MATCH_ITERATE(e, do_match,
- skb, in, out,
- offset, &hotdrop) != 0)
+ if (IPT_MATCH_ITERATE(e, do_match, skb, &mtpar) != 0)
goto no_match;
ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1);
match = m->u.kernel.match;
ret = xt_check_match(match, AF_INET, m->u.match_size - sizeof(*m),
name, hookmask, ip->proto,
- ip->invflags & IPT_INV_PROTO);
- if (!ret && m->u.kernel.match->checkentry
- && !m->u.kernel.match->checkentry(name, ip, match, m->data,
- hookmask)) {
+ ip->invflags & IPT_INV_PROTO, ip, m->data);
+ if (ret < 0) {
duprintf("ip_tables: check failed for `%s'.\n",
m->u.kernel.match->name);
- ret = -EINVAL;
+ return ret;
}
- if (!ret)
- (*i)++;
- return ret;
+ ++*i;
+ return 0;
}
static int
target = t->u.kernel.target;
ret = xt_check_target(target, AF_INET, t->u.target_size - sizeof(*t),
name, e->comefrom, e->ip.proto,
- e->ip.invflags & IPT_INV_PROTO);
- if (!ret && t->u.kernel.target->checkentry
- && !t->u.kernel.target->checkentry(name, e, target, t->data,
- e->comefrom)) {
+ e->ip.invflags & IPT_INV_PROTO, e, t->data);
+ if (ret < 0) {
duprintf("ip_tables: check failed for `%s'.\n",
t->u.kernel.target->name);
- ret = -EINVAL;
+ return ret;
}
- return ret;
+ return 0;
}
static int
{
unsigned int countersize;
struct xt_counters *counters;
- struct xt_table_info *private = table->private;
+ 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
unsigned int off, num;
struct ipt_entry *e;
struct xt_counters *counters;
- struct xt_table_info *private = table->private;
+ const struct xt_table_info *private = table->private;
int ret = 0;
- void *loc_cpu_entry;
+ const void *loc_cpu_entry;
counters = alloc_counters(table);
if (IS_ERR(counters))
/* ... then go back and fix counters and names */
for (off = 0, num = 0; off < total_size; off += e->next_offset, num++){
unsigned int i;
- struct ipt_entry_match *m;
- struct ipt_entry_target *t;
+ const struct ipt_entry_match *m;
+ const struct ipt_entry_target *t;
e = (struct ipt_entry *)(loc_cpu_entry + off);
if (copy_to_user(userptr + off
"iptable_%s", name);
if (t && !IS_ERR(t)) {
struct ipt_getinfo info;
- struct xt_table_info *private = t->private;
+ const struct xt_table_info *private = t->private;
#ifdef CONFIG_COMPAT
if (compat) {
t = xt_find_table_lock(net, AF_INET, get.name);
if (t && !IS_ERR(t)) {
- struct xt_table_info *private = t->private;
+ const struct xt_table_info *private = t->private;
duprintf("t->private->number = %u\n", private->number);
if (get.size == private->size)
ret = copy_entries_to_user(private->size,
else {
duprintf("get_entries: I've got %u not %u!\n",
private->size, get.size);
- ret = -EINVAL;
+ ret = -EAGAIN;
}
module_put(t->me);
xt_table_unlock(t);
struct xt_counters_info tmp;
struct xt_counters *paddc;
unsigned int num_counters;
- char *name;
+ const char *name;
int size;
void *ptmp;
struct xt_table *t;
- struct xt_table_info *private;
+ const struct xt_table_info *private;
int ret = 0;
void *loc_cpu_entry;
#ifdef CONFIG_COMPAT
switch (cmd) {
case IPT_SO_SET_REPLACE:
- ret = compat_do_replace(sk->sk_net, user, len);
+ ret = compat_do_replace(sock_net(sk), user, len);
break;
case IPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sk->sk_net, user, len, 1);
+ ret = do_add_counters(sock_net(sk), user, len, 1);
break;
default:
void __user *userptr)
{
struct xt_counters *counters;
- struct xt_table_info *private = table->private;
+ const struct xt_table_info *private = table->private;
void __user *pos;
unsigned int size;
int ret = 0;
- void *loc_cpu_entry;
+ const void *loc_cpu_entry;
unsigned int i = 0;
counters = alloc_counters(table);
xt_compat_lock(AF_INET);
t = xt_find_table_lock(net, AF_INET, get.name);
if (t && !IS_ERR(t)) {
- struct xt_table_info *private = t->private;
+ const struct xt_table_info *private = t->private;
struct xt_table_info info;
duprintf("t->private->number = %u\n", private->number);
ret = compat_table_info(private, &info);
} else if (!ret) {
duprintf("compat_get_entries: I've got %u not %u!\n",
private->size, get.size);
- ret = -EINVAL;
+ ret = -EAGAIN;
}
xt_compat_flush_offsets(AF_INET);
module_put(t->me);
switch (cmd) {
case IPT_SO_GET_INFO:
- ret = get_info(sk->sk_net, user, len, 1);
+ ret = get_info(sock_net(sk), user, len, 1);
break;
case IPT_SO_GET_ENTRIES:
- ret = compat_get_entries(sk->sk_net, user, len);
+ ret = compat_get_entries(sock_net(sk), user, len);
break;
default:
ret = do_ipt_get_ctl(sk, cmd, user, len);
switch (cmd) {
case IPT_SO_SET_REPLACE:
- ret = do_replace(sk->sk_net, user, len);
+ ret = do_replace(sock_net(sk), user, len);
break;
case IPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sk->sk_net, user, len, 0);
+ ret = do_add_counters(sock_net(sk), user, len, 0);
break;
default:
switch (cmd) {
case IPT_SO_GET_INFO:
- ret = get_info(sk->sk_net, user, len, 0);
+ ret = get_info(sock_net(sk), user, len, 0);
break;
case IPT_SO_GET_ENTRIES:
- ret = get_entries(sk->sk_net, user, len);
+ ret = get_entries(sock_net(sk), user, len);
break;
case IPT_SO_GET_REVISION_MATCH:
}
static bool
-icmp_match(const struct sk_buff *skb,
- const struct net_device *in,
- const struct net_device *out,
- const struct xt_match *match,
- const void *matchinfo,
- int offset,
- unsigned int protoff,
- bool *hotdrop)
+icmp_match(const struct sk_buff *skb, const struct xt_match_param *par)
{
- struct icmphdr _icmph, *ic;
- const struct ipt_icmp *icmpinfo = matchinfo;
+ const struct icmphdr *ic;
+ struct icmphdr _icmph;
+ const struct ipt_icmp *icmpinfo = par->matchinfo;
/* Must not be a fragment. */
- if (offset)
+ if (par->fragoff != 0)
return false;
- ic = skb_header_pointer(skb, protoff, sizeof(_icmph), &_icmph);
+ 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.
*/
duprintf("Dropping evil ICMP tinygram.\n");
- *hotdrop = true;
+ *par->hotdrop = true;
return false;
}
projects / mirror_ubuntu-bionic-kernel.git / blobdiff