const struct net_device *out,
unsigned int hooknum,
const struct xt_target *target,
- const void *targinfo,
- void *userinfo)
+ const void *targinfo)
{
if (net_ratelimit())
printk("ip_tables: error: `%s'\n", (char *)targinfo);
unsigned int hook,
const struct net_device *in,
const struct net_device *out,
- struct ipt_table *table,
- void *userdata)
+ struct ipt_table *table)
{
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
u_int16_t offset;
in, out,
hook,
t->u.kernel.target,
- t->data,
- userdata);
+ t->data);
#ifdef CONFIG_NETFILTER_DEBUG
if (((struct ipt_entry *)table_base)->comefrom
for (;;) {
struct ipt_standard_target *t
= (void *)ipt_get_target(e);
+ int visited = e->comefrom & (1 << hook);
if (e->comefrom & (1 << NF_IP_NUMHOOKS)) {
printk("iptables: loop hook %u pos %u %08X.\n",
|= ((1 << hook) | (1 << NF_IP_NUMHOOKS));
/* Unconditional return/END. */
- if (e->target_offset == sizeof(struct ipt_entry)
+ if ((e->target_offset == sizeof(struct ipt_entry)
&& (strcmp(t->target.u.user.name,
IPT_STANDARD_TARGET) == 0)
&& t->verdict < 0
- && unconditional(&e->ip)) {
+ && unconditional(&e->ip)) || visited) {
unsigned int oldpos, size;
if (t->verdict < -NF_MAX_VERDICT - 1) {
return 1;
if (m->u.kernel.match->destroy)
- m->u.kernel.match->destroy(m->u.kernel.match, m->data,
- m->u.match_size - sizeof(*m));
+ m->u.kernel.match->destroy(m->u.kernel.match, m->data);
module_put(m->u.kernel.match->me);
return 0;
}
static inline int
-check_match(struct ipt_entry_match *m,
+check_entry(struct ipt_entry *e, const char *name)
+{
+ struct ipt_entry_target *t;
+
+ if (!ip_checkentry(&e->ip)) {
+ duprintf("ip_tables: ip check failed %p %s.\n", e, name);
+ return -EINVAL;
+ }
+
+ if (e->target_offset + sizeof(struct ipt_entry_target) > e->next_offset)
+ return -EINVAL;
+
+ t = ipt_get_target(e);
+ if (e->target_offset + t->u.target_size > e->next_offset)
+ return -EINVAL;
+
+ return 0;
+}
+
+static inline int check_match(struct ipt_entry_match *m, const char *name,
+ const struct ipt_ip *ip, unsigned int hookmask)
+{
+ struct ipt_match *match;
+ int ret;
+
+ 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)) {
+ duprintf("ip_tables: check failed for `%s'.\n",
+ m->u.kernel.match->name);
+ ret = -EINVAL;
+ }
+ return ret;
+}
+
+static inline int
+find_check_match(struct ipt_entry_match *m,
const char *name,
const struct ipt_ip *ip,
unsigned int hookmask,
m->u.user.revision),
"ipt_%s", m->u.user.name);
if (IS_ERR(match) || !match) {
- duprintf("check_match: `%s' not found\n", m->u.user.name);
+ duprintf("find_check_match: `%s' not found\n", m->u.user.name);
return match ? PTR_ERR(match) : -ENOENT;
}
m->u.kernel.match = match;
- ret = xt_check_match(match, AF_INET, m->u.match_size - sizeof(*m),
- name, hookmask, ip->proto,
- ip->invflags & IPT_INV_PROTO);
+ ret = check_match(m, name, ip, hookmask);
if (ret)
goto err;
- if (m->u.kernel.match->checkentry
- && !m->u.kernel.match->checkentry(name, ip, match, m->data,
- m->u.match_size - sizeof(*m),
- hookmask)) {
- duprintf("ip_tables: check failed for `%s'.\n",
- m->u.kernel.match->name);
- ret = -EINVAL;
- goto err;
- }
-
(*i)++;
return 0;
err:
return ret;
}
-static struct ipt_target ipt_standard_target;
+static inline int check_target(struct ipt_entry *e, const char *name)
+{
+ struct ipt_entry_target *t;
+ struct ipt_target *target;
+ int ret;
+
+ t = ipt_get_target(e);
+ 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)) {
+ duprintf("ip_tables: check failed for `%s'.\n",
+ t->u.kernel.target->name);
+ ret = -EINVAL;
+ }
+ return ret;
+}
static inline int
-check_entry(struct ipt_entry *e, const char *name, unsigned int size,
+find_check_entry(struct ipt_entry *e, const char *name, unsigned int size,
unsigned int *i)
{
struct ipt_entry_target *t;
int ret;
unsigned int j;
- if (!ip_checkentry(&e->ip)) {
- duprintf("ip_tables: ip check failed %p %s.\n", e, name);
- return -EINVAL;
- }
-
- if (e->target_offset + sizeof(struct ipt_entry_target) > e->next_offset)
- return -EINVAL;
+ ret = check_entry(e, name);
+ if (ret)
+ return ret;
j = 0;
- ret = IPT_MATCH_ITERATE(e, check_match, name, &e->ip, e->comefrom, &j);
+ ret = IPT_MATCH_ITERATE(e, find_check_match, name, &e->ip,
+ e->comefrom, &j);
if (ret != 0)
goto cleanup_matches;
t = ipt_get_target(e);
- ret = -EINVAL;
- if (e->target_offset + t->u.target_size > e->next_offset)
- goto cleanup_matches;
target = try_then_request_module(xt_find_target(AF_INET,
t->u.user.name,
t->u.user.revision),
"ipt_%s", t->u.user.name);
if (IS_ERR(target) || !target) {
- duprintf("check_entry: `%s' not found\n", t->u.user.name);
+ duprintf("find_check_entry: `%s' not found\n", t->u.user.name);
ret = target ? PTR_ERR(target) : -ENOENT;
goto cleanup_matches;
}
t->u.kernel.target = 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);
+ ret = check_target(e, name);
if (ret)
goto err;
- if (t->u.kernel.target->checkentry
- && !t->u.kernel.target->checkentry(name, e, target, t->data,
- t->u.target_size
- - sizeof(*t),
- e->comefrom)) {
- duprintf("ip_tables: check failed for `%s'.\n",
- t->u.kernel.target->name);
- ret = -EINVAL;
- goto err;
- }
-
(*i)++;
return 0;
err:
IPT_MATCH_ITERATE(e, cleanup_match, NULL);
t = ipt_get_target(e);
if (t->u.kernel.target->destroy)
- t->u.kernel.target->destroy(t->u.kernel.target, t->data,
- t->u.target_size - sizeof(*t));
+ t->u.kernel.target->destroy(t->u.kernel.target, t->data);
module_put(t->u.kernel.target->me);
return 0;
}
/* Finally, each sanity check must pass */
i = 0;
ret = IPT_ENTRY_ITERATE(entry0, newinfo->size,
- check_entry, name, size, &i);
+ find_check_entry, name, size, &i);
if (ret != 0) {
IPT_ENTRY_ITERATE(entry0, newinfo->size,
#ifdef CONFIG_COMPAT
struct compat_delta {
struct compat_delta *next;
- u_int16_t offset;
+ unsigned int offset;
short delta;
};
static struct compat_delta *compat_offsets = NULL;
-static int compat_add_offset(u_int16_t offset, short delta)
+static int compat_add_offset(unsigned int offset, short delta)
{
struct compat_delta *tmp;
}
}
-static short compat_calc_jump(u_int16_t offset)
+static short compat_calc_jump(unsigned int offset)
{
struct compat_delta *tmp;
short delta;
return delta;
}
-struct compat_ipt_standard_target
+static void compat_standard_from_user(void *dst, void *src)
{
- struct compat_xt_entry_target target;
- compat_int_t verdict;
-};
+ int v = *(compat_int_t *)src;
-struct compat_ipt_standard
-{
- struct compat_ipt_entry entry;
- struct compat_ipt_standard_target target;
-};
-
-#define IPT_ST_LEN XT_ALIGN(sizeof(struct ipt_standard_target))
-#define IPT_ST_COMPAT_LEN COMPAT_XT_ALIGN(sizeof(struct compat_ipt_standard_target))
-#define IPT_ST_OFFSET (IPT_ST_LEN - IPT_ST_COMPAT_LEN)
+ if (v > 0)
+ v += compat_calc_jump(v);
+ memcpy(dst, &v, sizeof(v));
+}
-static int compat_ipt_standard_fn(void *target,
- void **dstptr, int *size, int convert)
+static int compat_standard_to_user(void __user *dst, void *src)
{
- struct compat_ipt_standard_target compat_st, *pcompat_st;
- struct ipt_standard_target st, *pst;
- int ret;
+ compat_int_t cv = *(int *)src;
- ret = 0;
- switch (convert) {
- case COMPAT_TO_USER:
- pst = target;
- memcpy(&compat_st.target, &pst->target,
- sizeof(compat_st.target));
- compat_st.verdict = pst->verdict;
- if (compat_st.verdict > 0)
- compat_st.verdict -=
- compat_calc_jump(compat_st.verdict);
- compat_st.target.u.user.target_size = IPT_ST_COMPAT_LEN;
- if (copy_to_user(*dstptr, &compat_st, IPT_ST_COMPAT_LEN))
- ret = -EFAULT;
- *size -= IPT_ST_OFFSET;
- *dstptr += IPT_ST_COMPAT_LEN;
- break;
- case COMPAT_FROM_USER:
- pcompat_st = target;
- memcpy(&st.target, &pcompat_st->target, IPT_ST_COMPAT_LEN);
- st.verdict = pcompat_st->verdict;
- if (st.verdict > 0)
- st.verdict += compat_calc_jump(st.verdict);
- st.target.u.user.target_size = IPT_ST_LEN;
- memcpy(*dstptr, &st, IPT_ST_LEN);
- *size += IPT_ST_OFFSET;
- *dstptr += IPT_ST_LEN;
- break;
- case COMPAT_CALC_SIZE:
- *size += IPT_ST_OFFSET;
- break;
- default:
- ret = -ENOPROTOOPT;
- break;
- }
- return ret;
+ if (cv > 0)
+ cv -= compat_calc_jump(cv);
+ return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0;
}
static inline int
compat_calc_match(struct ipt_entry_match *m, int * size)
{
- if (m->u.kernel.match->compat)
- m->u.kernel.match->compat(m, NULL, size, COMPAT_CALC_SIZE);
- else
- xt_compat_match(m, NULL, size, COMPAT_CALC_SIZE);
+ *size += xt_compat_match_offset(m->u.kernel.match);
return 0;
}
void *base, struct xt_table_info *newinfo)
{
struct ipt_entry_target *t;
- u_int16_t entry_offset;
+ unsigned int entry_offset;
int off, i, ret;
off = 0;
entry_offset = (void *)e - base;
IPT_MATCH_ITERATE(e, compat_calc_match, &off);
t = ipt_get_target(e);
- if (t->u.kernel.target->compat)
- t->u.kernel.target->compat(t, NULL, &off, COMPAT_CALC_SIZE);
- else
- xt_compat_target(t, NULL, &off, COMPAT_CALC_SIZE);
+ off += xt_compat_target_offset(t->u.kernel.target);
newinfo->size -= off;
ret = compat_add_offset(entry_offset, off);
if (ret)
static inline int compat_copy_match_to_user(struct ipt_entry_match *m,
void __user **dstptr, compat_uint_t *size)
{
- if (m->u.kernel.match->compat)
- return m->u.kernel.match->compat(m, dstptr, size,
- COMPAT_TO_USER);
- else
- return xt_compat_match(m, dstptr, size, COMPAT_TO_USER);
+ return xt_compat_match_to_user(m, dstptr, size);
}
static int compat_copy_entry_to_user(struct ipt_entry *e,
void __user **dstptr, compat_uint_t *size)
{
- struct ipt_entry_target __user *t;
+ struct ipt_entry_target *t;
struct compat_ipt_entry __user *ce;
u_int16_t target_offset, next_offset;
compat_uint_t origsize;
if (ret)
goto out;
t = ipt_get_target(e);
- if (t->u.kernel.target->compat)
- ret = t->u.kernel.target->compat(t, dstptr, size,
- COMPAT_TO_USER);
- else
- ret = xt_compat_target(t, dstptr, size, COMPAT_TO_USER);
+ ret = xt_compat_target_to_user(t, dstptr, size);
if (ret)
goto out;
ret = -EFAULT;
return match ? PTR_ERR(match) : -ENOENT;
}
m->u.kernel.match = match;
-
- if (m->u.kernel.match->compat)
- m->u.kernel.match->compat(m, NULL, size, COMPAT_CALC_SIZE);
- else
- xt_compat_match(m, NULL, size, COMPAT_CALC_SIZE);
+ *size += xt_compat_match_offset(match);
(*i)++;
return 0;
{
struct ipt_entry_target *t;
struct ipt_target *target;
- u_int16_t entry_offset;
+ unsigned int entry_offset;
int ret, off, h, j;
duprintf("check_compat_entry_size_and_hooks %p\n", e);
return -EINVAL;
}
- if (!ip_checkentry(&e->ip)) {
- duprintf("ip_tables: ip check failed %p %s.\n", e, name);
- return -EINVAL;
- }
-
- if (e->target_offset + sizeof(struct compat_xt_entry_target) >
- e->next_offset)
- return -EINVAL;
+ ret = check_entry(e, name);
+ if (ret)
+ return ret;
off = 0;
entry_offset = (void *)e - (void *)base;
goto cleanup_matches;
t = ipt_get_target(e);
- ret = -EINVAL;
- if (e->target_offset + t->u.target_size > e->next_offset)
- goto cleanup_matches;
target = try_then_request_module(xt_find_target(AF_INET,
t->u.user.name,
t->u.user.revision),
"ipt_%s", t->u.user.name);
if (IS_ERR(target) || !target) {
- duprintf("check_entry: `%s' not found\n", t->u.user.name);
+ duprintf("check_compat_entry_size_and_hooks: `%s' not found\n",
+ t->u.user.name);
ret = target ? PTR_ERR(target) : -ENOENT;
goto cleanup_matches;
}
t->u.kernel.target = target;
- if (t->u.kernel.target->compat)
- t->u.kernel.target->compat(t, NULL, &off, COMPAT_CALC_SIZE);
- else
- xt_compat_target(t, NULL, &off, COMPAT_CALC_SIZE);
+ off += xt_compat_target_offset(target);
*size += off;
ret = compat_add_offset(entry_offset, off);
if (ret)
void **dstptr, compat_uint_t *size, const char *name,
const struct ipt_ip *ip, unsigned int hookmask)
{
- struct ipt_entry_match *dm;
- struct ipt_match *match;
- int ret;
-
- dm = (struct ipt_entry_match *)*dstptr;
- match = m->u.kernel.match;
- if (match->compat)
- match->compat(m, dstptr, size, COMPAT_FROM_USER);
- else
- xt_compat_match(m, dstptr, size, COMPAT_FROM_USER);
-
- ret = xt_check_match(match, AF_INET, dm->u.match_size - sizeof(*dm),
- name, hookmask, ip->proto,
- ip->invflags & IPT_INV_PROTO);
-
- if (!ret && m->u.kernel.match->checkentry
- && !m->u.kernel.match->checkentry(name, ip, match, dm->data,
- dm->u.match_size - sizeof(*dm),
- hookmask)) {
- duprintf("ip_tables: check failed for `%s'.\n",
- m->u.kernel.match->name);
- ret = -EINVAL;
- }
- return ret;
+ xt_compat_match_from_user(m, dstptr, size);
+ return 0;
}
static int compat_copy_entry_from_user(struct ipt_entry *e, void **dstptr,
ret = IPT_MATCH_ITERATE(e, compat_copy_match_from_user, dstptr, size,
name, &de->ip, de->comefrom);
if (ret)
- goto err;
+ return ret;
de->target_offset = e->target_offset - (origsize - *size);
t = ipt_get_target(e);
target = t->u.kernel.target;
- if (target->compat)
- target->compat(t, dstptr, size, COMPAT_FROM_USER);
- else
- xt_compat_target(t, dstptr, size, COMPAT_FROM_USER);
+ xt_compat_target_from_user(t, dstptr, size);
de->next_offset = e->next_offset - (origsize - *size);
for (h = 0; h < NF_IP_NUMHOOKS; h++) {
if ((unsigned char *)de - base < newinfo->underflow[h])
newinfo->underflow[h] -= origsize - *size;
}
+ return ret;
+}
- t = ipt_get_target(de);
- 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);
+static inline int compat_check_entry(struct ipt_entry *e, const char *name)
+{
+ int ret;
+
+ ret = IPT_MATCH_ITERATE(e, check_match, name, &e->ip, e->comefrom);
if (ret)
- goto err;
+ return ret;
- if (t->u.kernel.target->checkentry
- && !t->u.kernel.target->checkentry(name, de, target,
- t->data, t->u.target_size - sizeof(*t),
- de->comefrom)) {
- duprintf("ip_tables: compat: check failed for `%s'.\n",
- t->u.kernel.target->name);
- ret = -EINVAL;
- goto err;
- }
- err:
- return ret;
+ return check_target(e, name);
}
static int
if (!mark_source_chains(newinfo, valid_hooks, entry1))
goto free_newinfo;
+ ret = IPT_ENTRY_ITERATE(entry1, newinfo->size, compat_check_entry,
+ name);
+ if (ret)
+ goto free_newinfo;
+
/* And one copy for every other CPU */
for_each_possible_cpu(i)
if (newinfo->entries[i] && newinfo->entries[i] != entry1)
const void *info,
const struct xt_match *match,
void *matchinfo,
- unsigned int matchsize,
unsigned int hook_mask)
{
const struct ipt_icmp *icmpinfo = matchinfo;
.targetsize = sizeof(int),
.family = AF_INET,
#ifdef CONFIG_COMPAT
- .compat = &compat_ipt_standard_fn,
+ .compatsize = sizeof(compat_int_t),
+ .compat_from_user = compat_standard_from_user,
+ .compat_to_user = compat_standard_to_user,
#endif
};
git://git.onelab.eu / linux-2.6.git / blobdiff