Multiple matches of the same type can be specified on the commandline.
If two or more matches of the same type are detected then the options
are assumed to be grouped in order to tell which option belongs
to which match:
... -m foo ... <options0> ... -m foo ... <options1> ...
Otherwise the commandline parsing is unmodified.
diff --git a/include/ip6tables.h b/include/ip6tables.h
index 549e041..d5ea878 100644
--- a/include/ip6tables.h
+++ b/include/ip6tables.h
@@ -13,6 +13,10 @@
struct ip6tables_rule_match *next;
struct ip6tables_match *match;
+
+ /* Multiple matches of the same type: the ones before
+ the current one are completed from parsing point of view */
+ unsigned int completed;
};
/* Include file for additions: new matches and targets. */
diff --git a/include/iptables.h b/include/iptables.h
index bf71e52..c56a005 100644
--- a/include/iptables.h
+++ b/include/iptables.h
@@ -29,6 +29,10 @@
struct iptables_rule_match *next;
struct iptables_match *match;
+
+ /* Multiple matches of the same type: the ones before
+ the current one are completed from parsing point of view */
+ unsigned int completed;
};
/* Include file for additions: new matches and targets. */
diff --git a/ip6tables.c b/ip6tables.c
index 9396d03..dcf7d36 100644
--- a/ip6tables.c
+++ b/ip6tables.c
@@ -709,37 +709,46 @@
}
struct ip6tables_match *
-find_match(const char *name, enum ip6t_tryload tryload, struct ip6tables_rule_match **matches)
+find_match(const char *match_name, enum ip6t_tryload tryload, struct ip6tables_rule_match **matches)
{
struct ip6tables_match *ptr;
- int icmphack = 0;
+ const char *icmp6 = "icmp6";
+ const char *name;
/* This is ugly as hell. Nonetheless, there is no way of changing
* this without hurting backwards compatibility */
- if ( (strcmp(name,"icmpv6") == 0) ||
- (strcmp(name,"ipv6-icmp") == 0) ||
- (strcmp(name,"icmp6") == 0) ) icmphack = 1;
+ if ( (strcmp(match_name,"icmpv6") == 0) ||
+ (strcmp(match_name,"ipv6-icmp") == 0) ||
+ (strcmp(match_name,"icmp6") == 0) )
+ name = icmp6;
+ else
+ name = match_name;
- if (!icmphack) {
- for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
- if (strcmp(name, ptr->name) == 0)
- break;
- }
- } else {
- for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
- if (strcmp("icmp6", ptr->name) == 0)
- break;
- }
- }
+ for (ptr = ip6tables_matches; ptr; ptr = ptr->next) {
+ if (strcmp(name, ptr->name) == 0) {
+ struct ip6tables_match *clone;
+
+ /* First match of this type: */
+ if (ptr->m == NULL)
+ break;
+
+ /* Second and subsequent clones */
+ clone = fw_malloc(sizeof(struct ip6tables_match));
+ memcpy(clone, ptr, sizeof(struct ip6tables_match));
+ clone->mflags = 0;
+ /* This is a clone: */
+ clone->next = clone;
+
+ ptr = clone;
+ break;
+ }
+ }
#ifndef NO_SHARED_LIBS
if (!ptr && tryload != DONT_LOAD && tryload != DURING_LOAD) {
char path[strlen(lib_dir) + sizeof("/libip6t_.so")
+ strlen(name)];
- if (!icmphack)
- sprintf(path, "%s/libip6t_%s.so", lib_dir, name);
- else
- sprintf(path, "%s/libip6t_%s.so", lib_dir, "icmpv6");
+ sprintf(path, "%s/libip6t_%s.so", lib_dir, name);
if (dlopen(path, RTLD_NOW)) {
/* Found library. If it didn't register itself,
maybe they specified target as match. */
@@ -773,8 +782,12 @@
newentry = fw_malloc(sizeof(struct ip6tables_rule_match));
- for (i = matches; *i; i = &(*i)->next);
+ for (i = matches; *i; i = &(*i)->next) {
+ if (strcmp(name, (*i)->match->name) == 0)
+ (*i)->completed = 1;
+ }
newentry->match = ptr;
+ newentry->completed = 0;
newentry->next = NULL;
*i = newentry;
}
@@ -1701,6 +1714,10 @@
free(matchp->match->m);
matchp->match->m = NULL;
}
+ if (matchp->match == matchp->match->next) {
+ free(matchp->match);
+ matchp->match = NULL;
+ }
free(matchp);
matchp = tmp;
}
@@ -1988,7 +2005,9 @@
strcpy(m->m->u.user.name, m->name);
if (m->init != NULL)
m->init(m->m, &fw.nfcache);
- opts = merge_options(opts, m->extra_opts, &m->option_offset);
+ if (m != m->next)
+ /* Merge options for non-cloned matches */
+ opts = merge_options(opts, m->extra_opts, &m->option_offset);
}
break;
@@ -2066,14 +2085,14 @@
exit_tryhelp(2);
default:
- /* FIXME: This scheme doesn't allow two of the same
- matches --RR */
if (!target
|| !(target->parse(c - target->option_offset,
argv, invert,
&target->tflags,
&fw, &target->t))) {
for (matchp = matches; matchp; matchp = matchp->next) {
+ if (matchp->completed)
+ continue;
if (matchp->match->parse(c - matchp->match->option_offset,
argv, invert,
&matchp->match->mflags,
@@ -2088,7 +2107,7 @@
actually hear this code suck. */
/* some explanations (after four different bugs
- * in 3 different releases): If we encountere a
+ * in 3 different releases): If we encounter a
* parameter, that has not been parsed yet,
* it's not an option of an explicitly loaded
* match or a target. However, we support
diff --git a/iptables.c b/iptables.c
index c8ab71e..e79d64f 100644
--- a/iptables.c
+++ b/iptables.c
@@ -679,9 +679,24 @@
struct iptables_match *ptr;
for (ptr = iptables_matches; ptr; ptr = ptr->next) {
- if (strcmp(name, ptr->name) == 0)
+ if (strcmp(name, ptr->name) == 0) {
+ struct iptables_match *clone;
+
+ /* First match of this type: */
+ if (ptr->m == NULL)
+ break;
+
+ /* Second and subsequent clones */
+ clone = fw_malloc(sizeof(struct iptables_match));
+ memcpy(clone, ptr, sizeof(struct iptables_match));
+ clone->mflags = 0;
+ /* This is a clone: */
+ clone->next = clone;
+
+ ptr = clone;
break;
- }
+ }
+ }
#ifndef NO_SHARED_LIBS
if (!ptr && tryload != DONT_LOAD && tryload != DURING_LOAD) {
@@ -721,8 +736,12 @@
newentry = fw_malloc(sizeof(struct iptables_rule_match));
- for (i = matches; *i; i = &(*i)->next);
+ for (i = matches; *i; i = &(*i)->next) {
+ if (strcmp(name, (*i)->match->name) == 0)
+ (*i)->completed = 1;
+ }
newentry->match = ptr;
+ newentry->completed = 0;
newentry->next = NULL;
*i = newentry;
}
@@ -1810,6 +1829,10 @@
free(matchp->match->m);
matchp->match->m = NULL;
}
+ if (matchp->match == matchp->match->next) {
+ free(matchp->match);
+ matchp->match = NULL;
+ }
free(matchp);
matchp = tmp;
}
@@ -2134,7 +2157,9 @@
set_revision(m->m->u.user.name, m->revision);
if (m->init != NULL)
m->init(m->m, &fw.nfcache);
- opts = merge_options(opts, m->extra_opts, &m->option_offset);
+ if (m != m->next)
+ /* Merge options for non-cloned matches */
+ opts = merge_options(opts, m->extra_opts, &m->option_offset);
}
break;
@@ -2212,14 +2237,14 @@
exit_tryhelp(2);
default:
- /* FIXME: This scheme doesn't allow two of the same
- matches --RR */
if (!target
|| !(target->parse(c - target->option_offset,
argv, invert,
&target->tflags,
&fw, &target->t))) {
for (matchp = matches; matchp; matchp = matchp->next) {
+ if (matchp->completed)
+ continue;
if (matchp->match->parse(c - matchp->match->option_offset,
argv, invert,
&matchp->match->mflags,
@@ -2234,7 +2259,7 @@
actually hear this code suck. */
/* some explanations (after four different bugs
- * in 3 different releases): If we encountere a
+ * in 3 different releases): If we encounter a
* parameter, that has not been parsed yet,
* it's not an option of an explicitly loaded
* match or a target. However, we support