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-rw-r--r--libxtables/xtables.c128
1 files changed, 33 insertions, 95 deletions
diff --git a/libxtables/xtables.c b/libxtables/xtables.c
index de52e3e2..10d4e703 100644
--- a/libxtables/xtables.c
+++ b/libxtables/xtables.c
@@ -203,8 +203,10 @@ struct xtables_match *xtables_matches;
struct xtables_target *xtables_targets;
/* Fully register a match/target which was previously partially registered. */
-static bool xtables_fully_register_pending_match(struct xtables_match *me);
-static bool xtables_fully_register_pending_target(struct xtables_target *me);
+static bool xtables_fully_register_pending_match(struct xtables_match *me,
+ struct xtables_match *prev);
+static bool xtables_fully_register_pending_target(struct xtables_target *me,
+ struct xtables_target *prev);
#ifndef NO_SHARED_LIBS
/* registry for loaded shared objects to close later */
@@ -662,6 +664,7 @@ struct xtables_match *
xtables_find_match(const char *name, enum xtables_tryload tryload,
struct xtables_rule_match **matches)
{
+ struct xtables_match *prev = NULL;
struct xtables_match **dptr;
struct xtables_match *ptr;
const char *icmp6 = "icmp6";
@@ -683,8 +686,12 @@ xtables_find_match(const char *name, enum xtables_tryload tryload,
if (extension_cmp(name, (*dptr)->name, (*dptr)->family)) {
ptr = *dptr;
*dptr = (*dptr)->next;
- if (xtables_fully_register_pending_match(ptr))
+ if (xtables_fully_register_pending_match(ptr, prev)) {
+ prev = ptr;
continue;
+ } else if (prev) {
+ continue;
+ }
*dptr = ptr;
}
dptr = &((*dptr)->next);
@@ -778,6 +785,7 @@ xtables_find_match_revision(const char *name, enum xtables_tryload tryload,
struct xtables_target *
xtables_find_target(const char *name, enum xtables_tryload tryload)
{
+ struct xtables_target *prev = NULL;
struct xtables_target **dptr;
struct xtables_target *ptr;
@@ -794,8 +802,12 @@ xtables_find_target(const char *name, enum xtables_tryload tryload)
if (extension_cmp(name, (*dptr)->name, (*dptr)->family)) {
ptr = *dptr;
*dptr = (*dptr)->next;
- if (xtables_fully_register_pending_target(ptr))
+ if (xtables_fully_register_pending_target(ptr, prev)) {
+ prev = ptr;
continue;
+ } else if (prev) {
+ continue;
+ }
*dptr = ptr;
}
dptr = &((*dptr)->next);
@@ -1098,64 +1110,27 @@ static int xtables_target_prefer(const struct xtables_target *a,
b->revision, b->family);
}
-static bool xtables_fully_register_pending_match(struct xtables_match *me)
+static bool xtables_fully_register_pending_match(struct xtables_match *me,
+ struct xtables_match *prev)
{
- struct xtables_match **i, *old, *pos = NULL;
+ struct xtables_match **i;
const char *rn;
- int compare;
/* See if new match can be used. */
rn = (me->real_name != NULL) ? me->real_name : me->name;
if (!compatible_match_revision(rn, me->revision))
return false;
- old = xtables_find_match(me->name, XTF_DURING_LOAD, NULL);
- while (old) {
- compare = xtables_match_prefer(old, me);
- if (compare == 0) {
- fprintf(stderr,
- "%s: match `%s' already registered.\n",
- xt_params->program_name, me->name);
- exit(1);
- }
-
- /* Now we have two (or more) options, check compatibility. */
- rn = (old->real_name != NULL) ? old->real_name : old->name;
- if (compare > 0) {
- /* Kernel tells old isn't compatible anymore??? */
- if (!compatible_match_revision(rn, old->revision)) {
- /* Delete old one. */
- for (i = &xtables_matches; *i != old;)
- i = &(*i)->next;
- *i = old->next;
- }
- pos = old;
- old = old->next;
- if (!old)
- break;
- if (!extension_cmp(me->name, old->name, old->family))
- break;
- continue;
- }
-
- /* Found right old */
- pos = old;
- break;
- }
-
- if (!pos) {
+ if (!prev) {
/* Append to list. */
for (i = &xtables_matches; *i; i = &(*i)->next);
- } else if (compare < 0) {
- /* Prepend it */
- for (i = &xtables_matches; *i != pos; i = &(*i)->next);
- } else if (compare > 0) {
+ } else {
/* Append it */
- i = &pos->next;
- pos = pos->next;
+ i = &prev->next;
+ prev = prev->next;
}
- me->next = pos;
+ me->next = prev;
*i = me;
me->m = NULL;
@@ -1260,11 +1235,11 @@ void xtables_register_target(struct xtables_target *me)
#endif
}
-static bool xtables_fully_register_pending_target(struct xtables_target *me)
+static bool xtables_fully_register_pending_target(struct xtables_target *me,
+ struct xtables_target *prev)
{
- struct xtables_target **i, *old, *pos = NULL;
+ struct xtables_target **i;
const char *rn;
- int compare;
if (strcmp(me->name, "standard") != 0) {
/* See if new target can be used. */
@@ -1273,54 +1248,17 @@ static bool xtables_fully_register_pending_target(struct xtables_target *me)
return false;
}
- old = xtables_find_target(me->name, XTF_DURING_LOAD);
- while (old) {
- compare = xtables_target_prefer(old, me);
- if (compare == 0) {
- fprintf(stderr,
- "%s: target `%s' already registered.\n",
- xt_params->program_name, me->name);
- exit(1);
- }
-
- /* Now we have two (or more) options, check compatibility. */
- rn = (old->real_name != NULL) ? old->real_name : old->name;
- if (compare > 0) {
- /* Kernel tells old isn't compatible anymore??? */
- if (!compatible_target_revision(rn, old->revision)) {
- /* Delete old one. */
- for (i = &xtables_targets; *i != old;)
- i = &(*i)->next;
- *i = old->next;
- }
- pos = old;
- old = old->next;
- if (!old)
- break;
- if (!extension_cmp(me->name, old->name, old->family))
- break;
- continue;
- }
-
- /* Found right old */
- pos = old;
- break;
- }
-
- if (!pos) {
+ if (!prev) {
/* Prepend to list. */
i = &xtables_targets;
- pos = xtables_targets;
- } else if (compare < 0) {
- /* Prepend it */
- for (i = &xtables_targets; *i != pos; i = &(*i)->next);
- } else if (compare > 0) {
+ prev = xtables_targets;
+ } else {
/* Append it */
- i = &pos->next;
- pos = pos->next;
+ i = &prev->next;
+ prev = prev->next;
}
- me->next = pos;
+ me->next = prev;
*i = me;
me->t = NULL;