mirror of
https://github.com/ChronosX88/netsukuku.git
synced 2024-12-23 01:11:47 +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 @@
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*/
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/* (C) 1999 Paul ``Rusty'' Russell - Placed under the GNU GPL (See
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* COPYING for details).
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* COPYING for details).
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* (C) 2000-2004 by the Netfilter Core Team <coreteam@netfilter.org>
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*
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* 2003-Jun-20: Harald Welte <laforge@netfilter.org>:
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@ -17,7 +17,7 @@
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* 2003-Jun-23: Harald Welte <laforge@netfilter.org>:
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* - performance optimization, sponsored by Astaro AG (http://www.astaro.com/)
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* don't rebuild the chain cache after every operation, instead fix it
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* up after a ruleset change.
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* up after a ruleset change.
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* 2004-Aug-18: Harald Welte <laforge@netfilter.org>:
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* - futher performance work: total reimplementation of libiptc.
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* - libiptc now has a real internal (linked-list) represntation of the
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@ -27,6 +27,8 @@
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <linux/version.h>
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#include "linux_list.h"
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//#define IPTC_DEBUG2 1
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@ -44,6 +46,7 @@
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#define IPT_LIB_DIR "/usr/local/lib/iptables"
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#endif
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static int sockfd = -1;
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static int sockfd_use = 0;
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static void *iptc_fn = NULL;
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@ -130,7 +133,7 @@ STRUCT_TC_HANDLE
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int changed; /* Have changes been made? */
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struct list_head chains;
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struct chain_head *chain_iterator_cur;
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struct rule_head *rule_iterator_cur;
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@ -370,14 +373,14 @@ static int __iptcc_p_del_policy(TC_HANDLE_T h, unsigned int num)
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h->chain_iterator_cur->rules.prev;
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/* save verdict */
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h->chain_iterator_cur->verdict =
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h->chain_iterator_cur->verdict =
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*(int *)GET_TARGET(pr->entry)->data;
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/* save counter and counter_map information */
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h->chain_iterator_cur->counter_map.maptype =
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h->chain_iterator_cur->counter_map.maptype =
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COUNTER_MAP_NORMAL_MAP;
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h->chain_iterator_cur->counter_map.mappos = num-1;
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memcpy(&h->chain_iterator_cur->counters, &pr->entry->counters,
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memcpy(&h->chain_iterator_cur->counters, &pr->entry->counters,
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sizeof(h->chain_iterator_cur->counters));
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/* foot_offset points to verdict rule */
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@ -423,13 +426,13 @@ static void __iptcc_p_add_chain(TC_HANDLE_T h, struct chain_head *c,
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c->index = *num;
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iptc_insert_chain(h, c);
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h->chain_iterator_cur = c;
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}
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/* main parser function: add an entry from the blob to the cache */
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static int cache_add_entry(STRUCT_ENTRY *e,
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TC_HANDLE_T h,
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static int cache_add_entry(STRUCT_ENTRY *e,
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TC_HANDLE_T h,
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STRUCT_ENTRY **prev,
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unsigned int *num)
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{
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@ -453,9 +456,9 @@ static int cache_add_entry(STRUCT_ENTRY *e,
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* target, or a hook entry point */
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if (strcmp(GET_TARGET(e)->u.user.name, ERROR_TARGET) == 0) {
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struct chain_head *c =
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struct chain_head *c =
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iptcc_alloc_chain_head((const char *)GET_TARGET(e)->data, 0);
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DEBUGP_C("%u:%u:new userdefined chain %s: %p\n", *num, offset,
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DEBUGP_C("%u:%u:new userdefined chain %s: %p\n", *num, offset,
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(char *)c->name, c);
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if (!c) {
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errno = -ENOMEM;
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@ -466,9 +469,9 @@ static int cache_add_entry(STRUCT_ENTRY *e,
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} else if ((builtin = iptcb_ent_is_hook_entry(e, h)) != 0) {
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struct chain_head *c =
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iptcc_alloc_chain_head((char *)hooknames[builtin-1],
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iptcc_alloc_chain_head((char *)hooknames[builtin-1],
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builtin);
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DEBUGP_C("%u:%u new builtin chain: %p (rules=%p)\n",
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DEBUGP_C("%u:%u new builtin chain: %p (rules=%p)\n",
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*num, offset, c, &c->rules);
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if (!c) {
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errno = -ENOMEM;
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@ -486,7 +489,7 @@ static int cache_add_entry(STRUCT_ENTRY *e,
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struct rule_head *r;
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new_rule:
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if (!(r = iptcc_alloc_rule(h->chain_iterator_cur,
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if (!(r = iptcc_alloc_rule(h->chain_iterator_cur,
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e->next_offset))) {
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errno = ENOMEM;
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return -1;
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@ -619,7 +622,7 @@ static inline int iptcc_compile_rule (TC_HANDLE_T h, STRUCT_REPLACE *repl, struc
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t = (STRUCT_STANDARD_TARGET *)GET_TARGET(r->entry);
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t->verdict = r->offset + r->size;
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}
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/* copy entry from cache to blob */
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memcpy((char *)repl->entries+r->offset, r->entry, r->size);
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@ -634,6 +637,25 @@ static int iptcc_compile_chain(TC_HANDLE_T h, STRUCT_REPLACE *repl, struct chain
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struct iptcb_chain_start *head;
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struct iptcb_chain_foot *foot;
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 7, 0)
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/* only user-defined chains have heaer */
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if (!iptcc_is_builtin(c)) {
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/* put chain header in place */
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head = (void *)repl->entries + c->head_offset;
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head->e.target_offset = sizeof(STRUCT_ENTRY);
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head->e.next_offset = IPTCB_CHAIN_START_SIZE;
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strcpy(head->name.t.u.user.name, ERROR_TARGET);
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head->name.t.u.target_size =
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ALIGN(sizeof(struct ipt_error_target));
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strcpy(head->name.error, c->name);
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} else {
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repl->hook_entry[c->hooknum-1] = c->head_offset;
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repl->underflow[c->hooknum-1] = c->foot_offset;
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}
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
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/* only user-defined chains have heaer */
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if (!iptcc_is_builtin(c)) {
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/* put chain header in place */
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@ -641,13 +663,14 @@ static int iptcc_compile_chain(TC_HANDLE_T h, STRUCT_REPLACE *repl, struct chain
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head->e.target_offset = sizeof(STRUCT_ENTRY);
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head->e.next_offset = IPTCB_CHAIN_START_SIZE;
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strcpy(head->name.target.u.user.name, ERROR_TARGET);
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head->name.target.u.target_size =
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head->name.target.u.target_size =
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ALIGN(sizeof(struct ipt_error_target));
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strcpy(head->name.errorname, c->name);
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strcpy(head->name.error, c->name);
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} else {
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repl->hook_entry[c->hooknum-1] = c->head_offset;
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repl->hook_entry[c->hooknum-1] = c->head_offset;
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repl->underflow[c->hooknum-1] = c->foot_offset;
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}
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#endif
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/* iterate over rules */
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list_for_each_entry(r, &c->rules, list) {
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@ -685,7 +708,7 @@ static int iptcc_compile_chain_offsets(TC_HANDLE_T h, struct chain_head *c,
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if (!iptcc_is_builtin(c)) {
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/* Chain has header */
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*offset += sizeof(STRUCT_ENTRY)
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*offset += sizeof(STRUCT_ENTRY)
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+ ALIGN(sizeof(struct ipt_error_target));
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(*num)++;
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}
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@ -698,7 +721,7 @@ static int iptcc_compile_chain_offsets(TC_HANDLE_T h, struct chain_head *c,
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(*num)++;
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}
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DEBUGP("%s; chain_foot %u, offset=%u, index=%u\n", c->name, *num,
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DEBUGP("%s; chain_foot %u, offset=%u, index=%u\n", c->name, *num,
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*offset, *num);
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c->foot_offset = *offset;
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c->foot_index = *num;
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@ -744,16 +767,27 @@ static int iptcc_compile_table(TC_HANDLE_T h, STRUCT_REPLACE *repl)
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if (ret < 0)
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return ret;
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}
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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 7, 0)
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/* Append error rule at end of chain */
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error = (void *)repl->entries + repl->size - IPTCB_CHAIN_ERROR_SIZE;
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error->entry.target_offset = sizeof(STRUCT_ENTRY);
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error->entry.next_offset = IPTCB_CHAIN_ERROR_SIZE;
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error->target.target.u.user.target_size =
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error->target.t.u.user.target_size =
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ALIGN(sizeof(struct ipt_error_target));
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strcpy((char *)&error->target.target.u.user.name, ERROR_TARGET);
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strcpy((char *)&error->target.errorname, "ERROR");
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strcpy((char *)&error->target.t.u.user.name, ERROR_TARGET);
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strcpy((char *)&error->target.error, "ERROR");
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#endif
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 0, 0)
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/* Append error rule at end of chain */
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error = (void *)repl->entries + repl->size - IPTCB_CHAIN_ERROR_SIZE;
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error->entry.target_offset = sizeof(STRUCT_ENTRY);
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error->entry.next_offset = IPTCB_CHAIN_ERROR_SIZE;
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error->target.target.u.user.target_size =
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ALIGN(sizeof(struct ipt_error_target));
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strcpy((char *)&error->target.target.u.user.name, ERROR_TARGET);
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strcpy((char *)&error->target.errorname, "ERROR");
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#endif
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return 1;
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}
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@ -809,7 +843,7 @@ TC_INIT(const char *tablename)
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errno = EINVAL;
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return NULL;
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}
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if (sockfd_use == 0) {
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sockfd = socket(TC_AF, SOCK_RAW, IPPROTO_RAW);
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if (sockfd < 0)
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@ -853,7 +887,7 @@ TC_INIT(const char *tablename)
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#ifdef IPTC_DEBUG2
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{
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int fd = open("/tmp/libiptc-so_get_entries.blob",
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int fd = open("/tmp/libiptc-so_get_entries.blob",
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O_CREAT|O_WRONLY);
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if (fd >= 0) {
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write(fd, h->entries, tmp);
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@ -911,7 +945,7 @@ print_match(const STRUCT_ENTRY_MATCH *m)
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}
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/*static int dump_entry(STRUCT_ENTRY *e, const TC_HANDLE_T handle);*/
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void
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TC_DUMP_ENTRIES(const TC_HANDLE_T handle)
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{
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@ -953,7 +987,7 @@ static void iptcc_chain_iterator_advance(TC_HANDLE_T handle)
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if (c->list.next == &handle->chains)
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handle->chain_iterator_cur = NULL;
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else
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handle->chain_iterator_cur =
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handle->chain_iterator_cur =
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list_entry(c->list.next, struct chain_head, list);
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}
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@ -993,7 +1027,7 @@ TC_NEXT_CHAIN(TC_HANDLE_T *handle)
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}
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iptcc_chain_iterator_advance(*handle);
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DEBUGP(": returning `%s'\n", c->name);
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return c->name;
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}
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@ -1041,13 +1075,13 @@ TC_NEXT_RULE(const STRUCT_ENTRY *prev, TC_HANDLE_T *handle)
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DEBUGP_C("returning NULL\n");
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return NULL;
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}
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r = list_entry((*handle)->rule_iterator_cur->list.next,
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r = list_entry((*handle)->rule_iterator_cur->list.next,
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struct rule_head, list);
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iptc_fn = TC_NEXT_RULE;
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DEBUGP_C("next=%p, head=%p...", &r->list,
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DEBUGP_C("next=%p, head=%p...", &r->list,
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&(*handle)->rule_iterator_cur->chain->rules);
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if (&r->list == &(*handle)->rule_iterator_cur->chain->rules) {
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@ -1076,7 +1110,7 @@ TC_NUM_RULES(const char *chain, TC_HANDLE_T *handle)
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errno = ENOENT;
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return (unsigned int)-1;
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}
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return c->num_rules;
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}
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@ -1086,7 +1120,7 @@ const STRUCT_ENTRY *TC_GET_RULE(const char *chain,
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{
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struct chain_head *c;
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struct rule_head *r;
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iptc_fn = TC_GET_RULE;
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CHECK(*handle);
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@ -1163,7 +1197,7 @@ int
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TC_BUILTIN(const char *chain, const TC_HANDLE_T handle)
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{
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struct chain_head *c;
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iptc_fn = TC_BUILTIN;
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c = iptcc_find_label(chain, handle);
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@ -1537,7 +1571,7 @@ TC_DELETE_ENTRY(const IPT_CHAINLABEL chain,
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* current iterator, move rule iterator back. next
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* pointer will then point to real next node */
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if (i == (*handle)->rule_iterator_cur) {
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(*handle)->rule_iterator_cur =
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(*handle)->rule_iterator_cur =
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list_entry((*handle)->rule_iterator_cur->list.prev,
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struct rule_head, list);
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}
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@ -1588,7 +1622,7 @@ TC_DELETE_NUM_ENTRY(const IPT_CHAINLABEL chain,
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* iterator, move rule iterator back. next pointer will then
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* point to real next node */
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if (r == (*handle)->rule_iterator_cur) {
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(*handle)->rule_iterator_cur =
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(*handle)->rule_iterator_cur =
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list_entry((*handle)->rule_iterator_cur->list.prev,
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struct rule_head, list);
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}
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@ -1691,7 +1725,7 @@ TC_ZERO_COUNTER(const IPT_CHAINLABEL chain,
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{
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struct chain_head *c;
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struct rule_head *r;
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iptc_fn = TC_ZERO_COUNTER;
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CHECK(*handle);
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@ -1713,7 +1747,7 @@ TC_ZERO_COUNTER(const IPT_CHAINLABEL chain,
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return 1;
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}
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int
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int
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TC_SET_COUNTER(const IPT_CHAINLABEL chain,
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unsigned int rulenum,
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STRUCT_COUNTERS *counters,
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@ -1892,7 +1926,7 @@ int TC_RENAME_CHAIN(const IPT_CHAINLABEL oldname,
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}
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strncpy(c->name, newname, sizeof(IPT_CHAINLABEL));
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set_changed(*handle);
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return 1;
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@ -2092,7 +2126,7 @@ TC_COMMIT(TC_HANDLE_T *handle)
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#ifdef IPTC_DEBUG2
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{
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int fd = open("/tmp/libiptc-so_set_replace.blob",
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int fd = open("/tmp/libiptc-so_set_replace.blob",
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O_CREAT|O_WRONLY);
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if (fd >= 0) {
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write(fd, repl, sizeof(*repl) + repl->size);
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@ -2125,12 +2159,12 @@ TC_COMMIT(TC_HANDLE_T *handle)
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break;
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case COUNTER_MAP_NORMAL_MAP:
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counters_normal_map(newcounters, repl,
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c->foot_index,
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c->foot_index,
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c->counter_map.mappos);
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break;
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case COUNTER_MAP_ZEROED:
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counters_map_zeroed(newcounters, repl,
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c->foot_index,
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c->foot_index,
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c->counter_map.mappos,
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&c->counters);
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break;
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@ -2150,7 +2184,7 @@ TC_COMMIT(TC_HANDLE_T *handle)
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case COUNTER_MAP_NORMAL_MAP:
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counters_normal_map(newcounters, repl,
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r->index,
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r->index,
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r->counter_map.mappos);
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break;
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@ -2187,7 +2221,7 @@ TC_COMMIT(TC_HANDLE_T *handle)
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#ifdef IPTC_DEBUG2
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{
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int fd = open("/tmp/libiptc-so_set_add_counters.blob",
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int fd = open("/tmp/libiptc-so_set_add_counters.blob",
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O_CREAT|O_WRONLY);
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if (fd >= 0) {
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write(fd, newcounters, counterlen);
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@ -2232,7 +2266,7 @@ TC_STRERROR(int err)
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} table [] =
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{ { TC_INIT, EPERM, "Permission denied (you must be root)" },
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{ TC_INIT, EINVAL, "Module is wrong version" },
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{ TC_INIT, ENOENT,
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{ TC_INIT, ENOENT,
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"Table does not exist (do you need to insmod?)" },
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{ TC_DELETE_CHAIN, ENOTEMPTY, "Chain is not empty" },
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{ TC_DELETE_CHAIN, EINVAL, "Can't delete built-in chain" },
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