mirror of
https://github.com/ChronosX88/netsukuku.git
synced 2024-11-26 04:02:19 +00:00
Linux Kernel Version checking
For compatibility between new and old distributions of linux.
This commit is contained in:
Valeska
parent
9b8df0cd35
commit
cf72a5ec59
@ -9,7 +9,7 @@
|
||||
*/
|
||||
|
||||
/* (C) 1999 Paul ``Rusty'' Russell - Placed under the GNU GPL (See
|
||||
* COPYING for details).
|
||||
* COPYING for details).
|
||||
* (C) 2000-2004 by the Netfilter Core Team <coreteam@netfilter.org>
|
||||
*
|
||||
* 2003-Jun-20: Harald Welte <laforge@netfilter.org>:
|
||||
@ -17,7 +17,7 @@
|
||||
* 2003-Jun-23: Harald Welte <laforge@netfilter.org>:
|
||||
* - performance optimization, sponsored by Astaro AG (http://www.astaro.com/)
|
||||
* don't rebuild the chain cache after every operation, instead fix it
|
||||
* up after a ruleset change.
|
||||
* up after a ruleset change.
|
||||
* 2004-Aug-18: Harald Welte <laforge@netfilter.org>:
|
||||
* - futher performance work: total reimplementation of libiptc.
|
||||
* - libiptc now has a real internal (linked-list) represntation of the
|
||||
@ -27,6 +27,8 @@
|
||||
#include <sys/types.h>
|
||||
#include <sys/socket.h>
|
||||
|
||||
#include <linux/version.h>
|
||||
|
||||
#include "linux_list.h"
|
||||
|
||||
//#define IPTC_DEBUG2 1
|
||||
@ -44,6 +46,7 @@
|
||||
#define IPT_LIB_DIR "/usr/local/lib/iptables"
|
||||
#endif
|
||||
|
||||
|
||||
static int sockfd = -1;
|
||||
static int sockfd_use = 0;
|
||||
static void *iptc_fn = NULL;
|
||||
@ -130,7 +133,7 @@ STRUCT_TC_HANDLE
|
||||
int changed; /* Have changes been made? */
|
||||
|
||||
struct list_head chains;
|
||||
|
||||
|
||||
struct chain_head *chain_iterator_cur;
|
||||
struct rule_head *rule_iterator_cur;
|
||||
|
||||
@ -370,14 +373,14 @@ static int __iptcc_p_del_policy(TC_HANDLE_T h, unsigned int num)
|
||||
h->chain_iterator_cur->rules.prev;
|
||||
|
||||
/* save verdict */
|
||||
h->chain_iterator_cur->verdict =
|
||||
h->chain_iterator_cur->verdict =
|
||||
*(int *)GET_TARGET(pr->entry)->data;
|
||||
|
||||
/* save counter and counter_map information */
|
||||
h->chain_iterator_cur->counter_map.maptype =
|
||||
h->chain_iterator_cur->counter_map.maptype =
|
||||
COUNTER_MAP_NORMAL_MAP;
|
||||
h->chain_iterator_cur->counter_map.mappos = num-1;
|
||||
memcpy(&h->chain_iterator_cur->counters, &pr->entry->counters,
|
||||
memcpy(&h->chain_iterator_cur->counters, &pr->entry->counters,
|
||||
sizeof(h->chain_iterator_cur->counters));
|
||||
|
||||
/* foot_offset points to verdict rule */
|
||||
@ -423,13 +426,13 @@ static void __iptcc_p_add_chain(TC_HANDLE_T h, struct chain_head *c,
|
||||
c->index = *num;
|
||||
|
||||
iptc_insert_chain(h, c);
|
||||
|
||||
|
||||
h->chain_iterator_cur = c;
|
||||
}
|
||||
|
||||
/* main parser function: add an entry from the blob to the cache */
|
||||
static int cache_add_entry(STRUCT_ENTRY *e,
|
||||
TC_HANDLE_T h,
|
||||
static int cache_add_entry(STRUCT_ENTRY *e,
|
||||
TC_HANDLE_T h,
|
||||
STRUCT_ENTRY **prev,
|
||||
unsigned int *num)
|
||||
{
|
||||
@ -453,9 +456,9 @@ static int cache_add_entry(STRUCT_ENTRY *e,
|
||||
* target, or a hook entry point */
|
||||
|
||||
if (strcmp(GET_TARGET(e)->u.user.name, ERROR_TARGET) == 0) {
|
||||
struct chain_head *c =
|
||||
struct chain_head *c =
|
||||
iptcc_alloc_chain_head((const char *)GET_TARGET(e)->data, 0);
|
||||
DEBUGP_C("%u:%u:new userdefined chain %s: %p\n", *num, offset,
|
||||
DEBUGP_C("%u:%u:new userdefined chain %s: %p\n", *num, offset,
|
||||
(char *)c->name, c);
|
||||
if (!c) {
|
||||
errno = -ENOMEM;
|
||||
@ -466,9 +469,9 @@ static int cache_add_entry(STRUCT_ENTRY *e,
|
||||
|
||||
} else if ((builtin = iptcb_ent_is_hook_entry(e, h)) != 0) {
|
||||
struct chain_head *c =
|
||||
iptcc_alloc_chain_head((char *)hooknames[builtin-1],
|
||||
iptcc_alloc_chain_head((char *)hooknames[builtin-1],
|
||||
builtin);
|
||||
DEBUGP_C("%u:%u new builtin chain: %p (rules=%p)\n",
|
||||
DEBUGP_C("%u:%u new builtin chain: %p (rules=%p)\n",
|
||||
*num, offset, c, &c->rules);
|
||||
if (!c) {
|
||||
errno = -ENOMEM;
|
||||
@ -486,7 +489,7 @@ static int cache_add_entry(STRUCT_ENTRY *e,
|
||||
struct rule_head *r;
|
||||
new_rule:
|
||||
|
||||
if (!(r = iptcc_alloc_rule(h->chain_iterator_cur,
|
||||
if (!(r = iptcc_alloc_rule(h->chain_iterator_cur,
|
||||
e->next_offset))) {
|
||||
errno = ENOMEM;
|
||||
return -1;
|
||||
@ -619,7 +622,7 @@ static inline int iptcc_compile_rule (TC_HANDLE_T h, STRUCT_REPLACE *repl, struc
|
||||
t = (STRUCT_STANDARD_TARGET *)GET_TARGET(r->entry);
|
||||
t->verdict = r->offset + r->size;
|
||||
}
|
||||
|
||||
|
||||
/* copy entry from cache to blob */
|
||||
memcpy((char *)repl->entries+r->offset, r->entry, r->size);
|
||||
|
||||
@ -634,6 +637,25 @@ static int iptcc_compile_chain(TC_HANDLE_T h, STRUCT_REPLACE *repl, struct chain
|
||||
struct iptcb_chain_start *head;
|
||||
struct iptcb_chain_foot *foot;
|
||||
|
||||
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 7, 0)
|
||||
|
||||
/* only user-defined chains have heaer */
|
||||
if (!iptcc_is_builtin(c)) {
|
||||
/* put chain header in place */
|
||||
head = (void *)repl->entries + c->head_offset;
|
||||
head->e.target_offset = sizeof(STRUCT_ENTRY);
|
||||
head->e.next_offset = IPTCB_CHAIN_START_SIZE;
|
||||
strcpy(head->name.t.u.user.name, ERROR_TARGET);
|
||||
head->name.t.u.target_size =
|
||||
ALIGN(sizeof(struct ipt_error_target));
|
||||
strcpy(head->name.error, c->name);
|
||||
} else {
|
||||
repl->hook_entry[c->hooknum-1] = c->head_offset;
|
||||
repl->underflow[c->hooknum-1] = c->foot_offset;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
|
||||
/* only user-defined chains have heaer */
|
||||
if (!iptcc_is_builtin(c)) {
|
||||
/* put chain header in place */
|
||||
@ -641,13 +663,14 @@ static int iptcc_compile_chain(TC_HANDLE_T h, STRUCT_REPLACE *repl, struct chain
|
||||
head->e.target_offset = sizeof(STRUCT_ENTRY);
|
||||
head->e.next_offset = IPTCB_CHAIN_START_SIZE;
|
||||
strcpy(head->name.target.u.user.name, ERROR_TARGET);
|
||||
head->name.target.u.target_size =
|
||||
head->name.target.u.target_size =
|
||||
ALIGN(sizeof(struct ipt_error_target));
|
||||
strcpy(head->name.errorname, c->name);
|
||||
strcpy(head->name.error, c->name);
|
||||
} else {
|
||||
repl->hook_entry[c->hooknum-1] = c->head_offset;
|
||||
repl->hook_entry[c->hooknum-1] = c->head_offset;
|
||||
repl->underflow[c->hooknum-1] = c->foot_offset;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* iterate over rules */
|
||||
list_for_each_entry(r, &c->rules, list) {
|
||||
@ -685,7 +708,7 @@ static int iptcc_compile_chain_offsets(TC_HANDLE_T h, struct chain_head *c,
|
||||
|
||||
if (!iptcc_is_builtin(c)) {
|
||||
/* Chain has header */
|
||||
*offset += sizeof(STRUCT_ENTRY)
|
||||
*offset += sizeof(STRUCT_ENTRY)
|
||||
+ ALIGN(sizeof(struct ipt_error_target));
|
||||
(*num)++;
|
||||
}
|
||||
@ -698,7 +721,7 @@ static int iptcc_compile_chain_offsets(TC_HANDLE_T h, struct chain_head *c,
|
||||
(*num)++;
|
||||
}
|
||||
|
||||
DEBUGP("%s; chain_foot %u, offset=%u, index=%u\n", c->name, *num,
|
||||
DEBUGP("%s; chain_foot %u, offset=%u, index=%u\n", c->name, *num,
|
||||
*offset, *num);
|
||||
c->foot_offset = *offset;
|
||||
c->foot_index = *num;
|
||||
@ -744,16 +767,27 @@ static int iptcc_compile_table(TC_HANDLE_T h, STRUCT_REPLACE *repl)
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 7, 0)
|
||||
/* Append error rule at end of chain */
|
||||
error = (void *)repl->entries + repl->size - IPTCB_CHAIN_ERROR_SIZE;
|
||||
error->entry.target_offset = sizeof(STRUCT_ENTRY);
|
||||
error->entry.next_offset = IPTCB_CHAIN_ERROR_SIZE;
|
||||
error->target.target.u.user.target_size =
|
||||
error->target.t.u.user.target_size =
|
||||
ALIGN(sizeof(struct ipt_error_target));
|
||||
strcpy((char *)&error->target.target.u.user.name, ERROR_TARGET);
|
||||
strcpy((char *)&error->target.errorname, "ERROR");
|
||||
strcpy((char *)&error->target.t.u.user.name, ERROR_TARGET);
|
||||
strcpy((char *)&error->target.error, "ERROR");
|
||||
#endif
|
||||
|
||||
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
|
||||
/* Append error rule at end of chain */
|
||||
error = (void *)repl->entries + repl->size - IPTCB_CHAIN_ERROR_SIZE;
|
||||
error->entry.target_offset = sizeof(STRUCT_ENTRY);
|
||||
error->entry.next_offset = IPTCB_CHAIN_ERROR_SIZE;
|
||||
error->target.target.u.user.target_size =
|
||||
ALIGN(sizeof(struct ipt_error_target));
|
||||
strcpy((char *)&error->target.target.u.user.name, ERROR_TARGET);
|
||||
strcpy((char *)&error->target.errorname, "ERROR");
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
||||
@ -809,7 +843,7 @@ TC_INIT(const char *tablename)
|
||||
errno = EINVAL;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
if (sockfd_use == 0) {
|
||||
sockfd = socket(TC_AF, SOCK_RAW, IPPROTO_RAW);
|
||||
if (sockfd < 0)
|
||||
@ -853,7 +887,7 @@ TC_INIT(const char *tablename)
|
||||
|
||||
#ifdef IPTC_DEBUG2
|
||||
{
|
||||
int fd = open("/tmp/libiptc-so_get_entries.blob",
|
||||
int fd = open("/tmp/libiptc-so_get_entries.blob",
|
||||
O_CREAT|O_WRONLY);
|
||||
if (fd >= 0) {
|
||||
write(fd, h->entries, tmp);
|
||||
@ -911,7 +945,7 @@ print_match(const STRUCT_ENTRY_MATCH *m)
|
||||
}
|
||||
|
||||
/*static int dump_entry(STRUCT_ENTRY *e, const TC_HANDLE_T handle);*/
|
||||
|
||||
|
||||
void
|
||||
TC_DUMP_ENTRIES(const TC_HANDLE_T handle)
|
||||
{
|
||||
@ -953,7 +987,7 @@ static void iptcc_chain_iterator_advance(TC_HANDLE_T handle)
|
||||
if (c->list.next == &handle->chains)
|
||||
handle->chain_iterator_cur = NULL;
|
||||
else
|
||||
handle->chain_iterator_cur =
|
||||
handle->chain_iterator_cur =
|
||||
list_entry(c->list.next, struct chain_head, list);
|
||||
}
|
||||
|
||||
@ -993,7 +1027,7 @@ TC_NEXT_CHAIN(TC_HANDLE_T *handle)
|
||||
}
|
||||
|
||||
iptcc_chain_iterator_advance(*handle);
|
||||
|
||||
|
||||
DEBUGP(": returning `%s'\n", c->name);
|
||||
return c->name;
|
||||
}
|
||||
@ -1041,13 +1075,13 @@ TC_NEXT_RULE(const STRUCT_ENTRY *prev, TC_HANDLE_T *handle)
|
||||
DEBUGP_C("returning NULL\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
r = list_entry((*handle)->rule_iterator_cur->list.next,
|
||||
|
||||
r = list_entry((*handle)->rule_iterator_cur->list.next,
|
||||
struct rule_head, list);
|
||||
|
||||
iptc_fn = TC_NEXT_RULE;
|
||||
|
||||
DEBUGP_C("next=%p, head=%p...", &r->list,
|
||||
DEBUGP_C("next=%p, head=%p...", &r->list,
|
||||
&(*handle)->rule_iterator_cur->chain->rules);
|
||||
|
||||
if (&r->list == &(*handle)->rule_iterator_cur->chain->rules) {
|
||||
@ -1076,7 +1110,7 @@ TC_NUM_RULES(const char *chain, TC_HANDLE_T *handle)
|
||||
errno = ENOENT;
|
||||
return (unsigned int)-1;
|
||||
}
|
||||
|
||||
|
||||
return c->num_rules;
|
||||
}
|
||||
|
||||
@ -1086,7 +1120,7 @@ const STRUCT_ENTRY *TC_GET_RULE(const char *chain,
|
||||
{
|
||||
struct chain_head *c;
|
||||
struct rule_head *r;
|
||||
|
||||
|
||||
iptc_fn = TC_GET_RULE;
|
||||
|
||||
CHECK(*handle);
|
||||
@ -1163,7 +1197,7 @@ int
|
||||
TC_BUILTIN(const char *chain, const TC_HANDLE_T handle)
|
||||
{
|
||||
struct chain_head *c;
|
||||
|
||||
|
||||
iptc_fn = TC_BUILTIN;
|
||||
|
||||
c = iptcc_find_label(chain, handle);
|
||||
@ -1537,7 +1571,7 @@ TC_DELETE_ENTRY(const IPT_CHAINLABEL chain,
|
||||
* current iterator, move rule iterator back. next
|
||||
* pointer will then point to real next node */
|
||||
if (i == (*handle)->rule_iterator_cur) {
|
||||
(*handle)->rule_iterator_cur =
|
||||
(*handle)->rule_iterator_cur =
|
||||
list_entry((*handle)->rule_iterator_cur->list.prev,
|
||||
struct rule_head, list);
|
||||
}
|
||||
@ -1588,7 +1622,7 @@ TC_DELETE_NUM_ENTRY(const IPT_CHAINLABEL chain,
|
||||
* iterator, move rule iterator back. next pointer will then
|
||||
* point to real next node */
|
||||
if (r == (*handle)->rule_iterator_cur) {
|
||||
(*handle)->rule_iterator_cur =
|
||||
(*handle)->rule_iterator_cur =
|
||||
list_entry((*handle)->rule_iterator_cur->list.prev,
|
||||
struct rule_head, list);
|
||||
}
|
||||
@ -1691,7 +1725,7 @@ TC_ZERO_COUNTER(const IPT_CHAINLABEL chain,
|
||||
{
|
||||
struct chain_head *c;
|
||||
struct rule_head *r;
|
||||
|
||||
|
||||
iptc_fn = TC_ZERO_COUNTER;
|
||||
CHECK(*handle);
|
||||
|
||||
@ -1713,7 +1747,7 @@ TC_ZERO_COUNTER(const IPT_CHAINLABEL chain,
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
int
|
||||
TC_SET_COUNTER(const IPT_CHAINLABEL chain,
|
||||
unsigned int rulenum,
|
||||
STRUCT_COUNTERS *counters,
|
||||
@ -1892,7 +1926,7 @@ int TC_RENAME_CHAIN(const IPT_CHAINLABEL oldname,
|
||||
}
|
||||
|
||||
strncpy(c->name, newname, sizeof(IPT_CHAINLABEL));
|
||||
|
||||
|
||||
set_changed(*handle);
|
||||
|
||||
return 1;
|
||||
@ -2092,7 +2126,7 @@ TC_COMMIT(TC_HANDLE_T *handle)
|
||||
|
||||
#ifdef IPTC_DEBUG2
|
||||
{
|
||||
int fd = open("/tmp/libiptc-so_set_replace.blob",
|
||||
int fd = open("/tmp/libiptc-so_set_replace.blob",
|
||||
O_CREAT|O_WRONLY);
|
||||
if (fd >= 0) {
|
||||
write(fd, repl, sizeof(*repl) + repl->size);
|
||||
@ -2125,12 +2159,12 @@ TC_COMMIT(TC_HANDLE_T *handle)
|
||||
break;
|
||||
case COUNTER_MAP_NORMAL_MAP:
|
||||
counters_normal_map(newcounters, repl,
|
||||
c->foot_index,
|
||||
c->foot_index,
|
||||
c->counter_map.mappos);
|
||||
break;
|
||||
case COUNTER_MAP_ZEROED:
|
||||
counters_map_zeroed(newcounters, repl,
|
||||
c->foot_index,
|
||||
c->foot_index,
|
||||
c->counter_map.mappos,
|
||||
&c->counters);
|
||||
break;
|
||||
@ -2150,7 +2184,7 @@ TC_COMMIT(TC_HANDLE_T *handle)
|
||||
|
||||
case COUNTER_MAP_NORMAL_MAP:
|
||||
counters_normal_map(newcounters, repl,
|
||||
r->index,
|
||||
r->index,
|
||||
r->counter_map.mappos);
|
||||
break;
|
||||
|
||||
@ -2187,7 +2221,7 @@ TC_COMMIT(TC_HANDLE_T *handle)
|
||||
|
||||
#ifdef IPTC_DEBUG2
|
||||
{
|
||||
int fd = open("/tmp/libiptc-so_set_add_counters.blob",
|
||||
int fd = open("/tmp/libiptc-so_set_add_counters.blob",
|
||||
O_CREAT|O_WRONLY);
|
||||
if (fd >= 0) {
|
||||
write(fd, newcounters, counterlen);
|
||||
@ -2232,7 +2266,7 @@ TC_STRERROR(int err)
|
||||
} table [] =
|
||||
{ { TC_INIT, EPERM, "Permission denied (you must be root)" },
|
||||
{ TC_INIT, EINVAL, "Module is wrong version" },
|
||||
{ TC_INIT, ENOENT,
|
||||
{ TC_INIT, ENOENT,
|
||||
"Table does not exist (do you need to insmod?)" },
|
||||
{ TC_DELETE_CHAIN, ENOTEMPTY, "Chain is not empty" },
|
||||
{ TC_DELETE_CHAIN, EINVAL, "Can't delete built-in chain" },
|
||||
|
||||
Loading…
Reference in New Issue
Block a user