From 5df8137ebc5db2bc9c6e71b2d154a5f77679d9d8 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Thu, 21 Feb 2013 18:49:56 +0100
Subject: [PATCH] unify object freeing

---
 defaults.c  |  7 +++---
 defaults.h  |  2 ++
 forwards.c  |  6 +++--
 forwards.h  |  5 +++-
 ipsets.c    | 71 +++++++++++++++++++++++++++++------------------------
 ipsets.h    | 21 +++-------------
 options.c   | 12 +++------
 options.h   |  2 +-
 redirects.c | 14 +++--------
 redirects.h |  5 +++-
 rules.c     | 23 +++--------------
 rules.h     |  5 +++-
 utils.c     | 12 +++++++++
 utils.h     |  2 ++
 zones.c     | 19 +++-----------
 zones.h     |  5 +++-
 16 files changed, 100 insertions(+), 111 deletions(-)

diff --git a/defaults.c b/defaults.c
index 0992f58..e1710c2 100644
--- a/defaults.c
+++ b/defaults.c
@@ -60,7 +60,7 @@ static const struct chain toplevel_rules[] = {
 	C(ANY, RAW,    UNSPEC,        "PREROUTING -j notrack"),
 };
 
-static struct fw3_option default_opts[] = {
+const struct fw3_option fw3_default_opts[] = {
 	FW3_OPT("input",               target,   defaults, policy_input),
 	FW3_OPT("forward",             target,   defaults, policy_forward),
 	FW3_OPT("output",              target,   defaults, policy_output),
@@ -82,6 +82,8 @@ static struct fw3_option default_opts[] = {
 
 	FW3_OPT("custom_chains",       bool,     defaults, custom_chains),
 	FW3_OPT("disable_ipv6",        bool,     defaults, disable_ipv6),
+
+	{ }
 };
 
 
@@ -157,8 +159,7 @@ fw3_load_defaults(struct fw3_state *state, struct uci_package *p)
 			continue;
 		}
 
-		fw3_parse_options(&state->defaults,
-		                  default_opts, ARRAY_SIZE(default_opts), s);
+		fw3_parse_options(&state->defaults, fw3_default_opts, s);
 
 		check_policy(e, &defs->policy_input, "input");
 		check_policy(e, &defs->policy_output, "output");
diff --git a/defaults.h b/defaults.h
index 72f3eef..562b895 100644
--- a/defaults.h
+++ b/defaults.h
@@ -21,6 +21,8 @@
 
 #include "options.h"
 
+extern const struct fw3_option fw3_default_opts[];
+
 void fw3_load_defaults(struct fw3_state *state, struct uci_package *p);
 
 void fw3_print_default_chains(enum fw3_table table, enum fw3_family family,
diff --git a/forwards.c b/forwards.c
index 9abe4bf..9f658fc 100644
--- a/forwards.c
+++ b/forwards.c
@@ -19,12 +19,14 @@
 #include "forwards.h"
 
 
-static struct fw3_option forward_opts[] = {
+const struct fw3_option fw3_forward_opts[] = {
 	FW3_OPT("name",                string,   forward,     name),
 	FW3_OPT("family",              family,   forward,     family),
 
 	FW3_OPT("src",                 device,   forward,     src),
 	FW3_OPT("dest",                device,   forward,     dest),
+
+	{ }
 };
 
 
@@ -51,7 +53,7 @@ fw3_load_forwards(struct fw3_state *state, struct uci_package *p)
 
 		memset(forward, 0, sizeof(*forward));
 
-		fw3_parse_options(forward, forward_opts, ARRAY_SIZE(forward_opts), s);
+		fw3_parse_options(forward, fw3_forward_opts, s);
 
 		if (forward->src.invert || forward->dest.invert)
 		{
diff --git a/forwards.h b/forwards.h
index c3caff9..f512bb1 100644
--- a/forwards.h
+++ b/forwards.h
@@ -23,10 +23,13 @@
 #include "zones.h"
 #include "utils.h"
 
+extern const struct fw3_option fw3_forward_opts[];
+
 void fw3_load_forwards(struct fw3_state *state, struct uci_package *p);
 void fw3_print_forwards(enum fw3_table table, enum fw3_family family,
                         struct fw3_state *state);
 
-#define fw3_free_forward(forward) free(forward)
+#define fw3_free_forward(forward) \
+	fw3_free_object(forward, fw3_forward_opts)
 
 #endif
diff --git a/ipsets.c b/ipsets.c
index 62ed131..e2c8575 100644
--- a/ipsets.c
+++ b/ipsets.c
@@ -19,7 +19,7 @@
 #include "ipsets.h"
 
 
-static struct fw3_option ipset_opts[] = {
+const struct fw3_option fw3_ipset_opts[] = {
 	FW3_OPT("name",          string,         ipset,     name),
 	FW3_OPT("family",        family,         ipset,     family),
 
@@ -35,6 +35,8 @@ static struct fw3_option ipset_opts[] = {
 	FW3_OPT("timeout",       int,            ipset,     timeout),
 
 	FW3_OPT("external",      string,         ipset,     external),
+
+	{ }
 };
 
 #define T(m, t1, t2, t3, r, o) \
@@ -42,27 +44,41 @@ static struct fw3_option ipset_opts[] = {
 	  FW3_IPSET_TYPE_##t1 | (FW3_IPSET_TYPE_##t2 << 8) | (FW3_IPSET_TYPE_##t3 << 16), \
 	  r, o }
 
-static struct fw3_ipset_settype ipset_types[] = {
-	T(BITMAP, IP,   UNSPEC, UNSPEC, FW3_IPSET_OPT_IPRANGE,
-	  FW3_IPSET_OPT_NETMASK),
-	T(BITMAP, IP,   MAC,    UNSPEC, FW3_IPSET_OPT_IPRANGE, 0),
-	T(BITMAP, PORT, UNSPEC, UNSPEC, FW3_IPSET_OPT_PORTRANGE, 0),
+enum ipset_optflag {
+	OPT_IPRANGE   = (1 << 0),
+	OPT_PORTRANGE = (1 << 1),
+	OPT_NETMASK   = (1 << 2),
+	OPT_HASHSIZE  = (1 << 3),
+	OPT_MAXELEM   = (1 << 4),
+	OPT_FAMILY    = (1 << 5),
+};
+
+struct ipset_type {
+	enum fw3_ipset_method method;
+	uint32_t types;
+	uint8_t required;
+	uint8_t optional;
+};
+
+static struct ipset_type ipset_types[] = {
+	T(BITMAP, IP,   UNSPEC, UNSPEC, OPT_IPRANGE, OPT_NETMASK),
+	T(BITMAP, IP,   MAC,    UNSPEC, OPT_IPRANGE, 0),
+	T(BITMAP, PORT, UNSPEC, UNSPEC, OPT_PORTRANGE, 0),
 
 	T(HASH,   IP,   UNSPEC, UNSPEC, 0,
-	  FW3_IPSET_OPT_FAMILY | FW3_IPSET_OPT_HASHSIZE | FW3_IPSET_OPT_MAXELEM |
-	  FW3_IPSET_OPT_NETMASK),
+	  OPT_FAMILY | OPT_HASHSIZE | OPT_MAXELEM | OPT_NETMASK),
 	T(HASH,   NET,  UNSPEC, UNSPEC, 0,
-	  FW3_IPSET_OPT_FAMILY | FW3_IPSET_OPT_HASHSIZE | FW3_IPSET_OPT_MAXELEM),
+	  OPT_FAMILY | OPT_HASHSIZE | OPT_MAXELEM),
 	T(HASH,   IP,   PORT,   UNSPEC, 0,
-	  FW3_IPSET_OPT_FAMILY | FW3_IPSET_OPT_HASHSIZE | FW3_IPSET_OPT_MAXELEM),
+	  OPT_FAMILY | OPT_HASHSIZE | OPT_MAXELEM),
 	T(HASH,   NET,  PORT,   UNSPEC, 0,
-	  FW3_IPSET_OPT_FAMILY | FW3_IPSET_OPT_HASHSIZE | FW3_IPSET_OPT_MAXELEM),
+	  OPT_FAMILY | OPT_HASHSIZE | OPT_MAXELEM),
 	T(HASH,   IP,   PORT,   IP,     0,
-	  FW3_IPSET_OPT_FAMILY | FW3_IPSET_OPT_HASHSIZE | FW3_IPSET_OPT_MAXELEM),
+	  OPT_FAMILY | OPT_HASHSIZE | OPT_MAXELEM),
 	T(HASH,   IP,   PORT,   NET,    0,
-	  FW3_IPSET_OPT_FAMILY | FW3_IPSET_OPT_HASHSIZE | FW3_IPSET_OPT_MAXELEM),
+	  OPT_FAMILY | OPT_HASHSIZE | OPT_MAXELEM),
 
-	T(LIST,   SET,  UNSPEC, UNSPEC, 0, FW3_IPSET_OPT_MAXELEM),
+	T(LIST,   SET,  UNSPEC, UNSPEC, 0, OPT_MAXELEM),
 };
 
 
@@ -119,56 +135,56 @@ check_types(struct uci_element *e, struct fw3_ipset *ipset)
 		{
 			if (!ipset->external || !*ipset->external)
 			{
-				if ((ipset_types[i].required & FW3_IPSET_OPT_IPRANGE) &&
+				if ((ipset_types[i].required & OPT_IPRANGE) &&
 					list_empty(&ipset->iprange))
 				{
 					warn_elem(e, "requires an ip range");
 					return false;
 				}
 
-				if ((ipset_types[i].required & FW3_IPSET_OPT_PORTRANGE) &&
+				if ((ipset_types[i].required & OPT_PORTRANGE) &&
 				    !ipset->portrange.set)
 				{
 					warn_elem(e, "requires a port range");
 					return false;
 				}
 
-				if (!(ipset_types[i].required & FW3_IPSET_OPT_IPRANGE) &&
+				if (!(ipset_types[i].required & OPT_IPRANGE) &&
 				    !list_empty(&ipset->iprange))
 				{
 					warn_elem(e, "iprange ignored");
 					fw3_free_list(&ipset->iprange);
 				}
 
-				if (!(ipset_types[i].required & FW3_IPSET_OPT_PORTRANGE) &&
+				if (!(ipset_types[i].required & OPT_PORTRANGE) &&
 				    ipset->portrange.set)
 				{
 					warn_elem(e, "portrange ignored");
 					memset(&ipset->portrange, 0, sizeof(ipset->portrange));
 				}
 
-				if (!(ipset_types[i].optional & FW3_IPSET_OPT_NETMASK) &&
+				if (!(ipset_types[i].optional & OPT_NETMASK) &&
 				    ipset->netmask > 0)
 				{
 					warn_elem(e, "netmask ignored");
 					ipset->netmask = 0;
 				}
 
-				if (!(ipset_types[i].optional & FW3_IPSET_OPT_HASHSIZE) &&
+				if (!(ipset_types[i].optional & OPT_HASHSIZE) &&
 				    ipset->hashsize > 0)
 				{
 					warn_elem(e, "hashsize ignored");
 					ipset->hashsize = 0;
 				}
 
-				if (!(ipset_types[i].optional & FW3_IPSET_OPT_MAXELEM) &&
+				if (!(ipset_types[i].optional & OPT_MAXELEM) &&
 				    ipset->maxelem > 0)
 				{
 					warn_elem(e, "maxelem ignored");
 					ipset->maxelem = 0;
 				}
 
-				if (!(ipset_types[i].optional & FW3_IPSET_OPT_FAMILY) &&
+				if (!(ipset_types[i].optional & OPT_FAMILY) &&
 				    ipset->family != FW3_FAMILY_ANY)
 				{
 					warn_elem(e, "family ignored");
@@ -226,7 +242,7 @@ fw3_load_ipsets(struct fw3_state *state, struct uci_package *p)
 		if (!ipset)
 			continue;
 
-		fw3_parse_options(ipset, ipset_opts, ARRAY_SIZE(ipset_opts), s);
+		fw3_parse_options(ipset, fw3_ipset_opts, s);
 
 		if (!ipset->name || !*ipset->name)
 		{
@@ -384,15 +400,6 @@ fw3_destroy_ipsets(struct fw3_state *state)
 	}
 }
 
-void
-fw3_free_ipset(struct fw3_ipset *ipset)
-{
-	fw3_free_list(&ipset->datatypes);
-	fw3_free_list(&ipset->iprange);
-
-	free(ipset);
-}
-
 struct fw3_ipset *
 fw3_lookup_ipset(struct fw3_state *state, const char *name, bool running)
 {
diff --git a/ipsets.h b/ipsets.h
index 410c712..debe0e8 100644
--- a/ipsets.h
+++ b/ipsets.h
@@ -22,30 +22,17 @@
 #include "options.h"
 #include "utils.h"
 
-enum fw3_ipset_opts {
-	FW3_IPSET_OPT_IPRANGE   = (1 << 0),
-	FW3_IPSET_OPT_PORTRANGE = (1 << 1),
-	FW3_IPSET_OPT_NETMASK   = (1 << 2),
-	FW3_IPSET_OPT_HASHSIZE  = (1 << 3),
-	FW3_IPSET_OPT_MAXELEM   = (1 << 4),
-	FW3_IPSET_OPT_FAMILY    = (1 << 5),
-};
-
-struct fw3_ipset_settype {
-	enum fw3_ipset_method method;
-	uint32_t types;
-	uint8_t required;
-	uint8_t optional;
-};
+extern const struct fw3_option fw3_ipset_opts[];
 
 struct fw3_ipset * fw3_alloc_ipset(void);
 void fw3_load_ipsets(struct fw3_state *state, struct uci_package *p);
 void fw3_create_ipsets(struct fw3_state *state);
 void fw3_destroy_ipsets(struct fw3_state *state);
 
-void fw3_free_ipset(struct fw3_ipset *ipset);
-
 struct fw3_ipset * fw3_lookup_ipset(struct fw3_state *state, const char *name,
                                     bool running);
 
+#define fw3_free_ipset(ipset) \
+	fw3_free_object(ipset, fw3_ipset_opts)
+
 #endif
diff --git a/options.c b/options.c
index 1f10050..0de4775 100644
--- a/options.c
+++ b/options.c
@@ -498,16 +498,14 @@ fw3_parse_ipset_datatype(void *ptr, const char *val)
 
 
 void
-fw3_parse_options(void *s,
-                  struct fw3_option *opts, int n,
+fw3_parse_options(void *s, const struct fw3_option *opts,
                   struct uci_section *section)
 {
-	int i;
 	char *p;
 	bool known;
 	struct uci_element *e, *l;
 	struct uci_option *o;
-	struct fw3_option *opt;
+	const struct fw3_option *opt;
 	struct list_head *item;
 	struct list_head *dest;
 
@@ -516,11 +514,9 @@ fw3_parse_options(void *s,
 		o = uci_to_option(e);
 		known = false;
 
-		for (i = 0; i < n; i++)
+		for (opt = opts; opt->name; opt++)
 		{
-			opt = &opts[i];
-
-			if (!opt->parse || !opt->name)
+			if (!opt->parse)
 				continue;
 
 			if (strcmp(opt->name, e->name))
diff --git a/options.h b/options.h
index c45a9d4..8115afc 100644
--- a/options.h
+++ b/options.h
@@ -413,7 +413,7 @@ bool fw3_parse_protocol(void *ptr, const char *val);
 bool fw3_parse_ipset_method(void *ptr, const char *val);
 bool fw3_parse_ipset_datatype(void *ptr, const char *val);
 
-void fw3_parse_options(void *s, struct fw3_option *opts, int n,
+void fw3_parse_options(void *s, const struct fw3_option *opts,
                        struct uci_section *section);
 
 void fw3_format_in_out(struct fw3_device *in, struct fw3_device *out);
diff --git a/redirects.c b/redirects.c
index 627438b..51c764f 100644
--- a/redirects.c
+++ b/redirects.c
@@ -19,7 +19,7 @@
 #include "redirects.h"
 
 
-static struct fw3_option redirect_opts[] = {
+const struct fw3_option fw3_redirect_opts[] = {
 	FW3_OPT("name",                string,   redirect,     name),
 	FW3_OPT("family",              family,   redirect,     family),
 
@@ -45,6 +45,8 @@ static struct fw3_option redirect_opts[] = {
 	FW3_OPT("reflection",          bool,     redirect,     reflection),
 
 	FW3_OPT("target",              target,   redirect,     target),
+
+	{ }
 };
 
 
@@ -123,7 +125,7 @@ fw3_load_redirects(struct fw3_state *state, struct uci_package *p)
 
 		redir->reflection = true;
 
-		fw3_parse_options(redir, redirect_opts, ARRAY_SIZE(redirect_opts), s);
+		fw3_parse_options(redir, fw3_redirect_opts, s);
 
 		if (redir->src.invert)
 		{
@@ -465,11 +467,3 @@ fw3_print_redirects(enum fw3_table table, enum fw3_family family,
 	list_for_each_entry(redir, &state->redirects, list)
 		print_redirect(table, family, redir, num++);
 }
-
-void
-fw3_free_redirect(struct fw3_redirect *redir)
-{
-	fw3_free_list(&redir->proto);
-	fw3_free_list(&redir->mac_src);
-	free(redir);
-}
diff --git a/redirects.h b/redirects.h
index e8da040..4436f52 100644
--- a/redirects.h
+++ b/redirects.h
@@ -24,10 +24,13 @@
 #include "ipsets.h"
 #include "ubus.h"
 
+extern const struct fw3_option fw3_redirect_opts[];
+
 void fw3_load_redirects(struct fw3_state *state, struct uci_package *p);
 void fw3_print_redirects(enum fw3_table table, enum fw3_family family,
                          struct fw3_state *state);
 
-void fw3_free_redirect(struct fw3_redirect *redir);
+#define fw3_free_redirect(redir) \
+	fw3_free_object(redir, fw3_redirect_opts)
 
 #endif
diff --git a/rules.c b/rules.c
index 1979340..ab094bb 100644
--- a/rules.c
+++ b/rules.c
@@ -19,7 +19,7 @@
 #include "rules.h"
 
 
-static struct fw3_option rule_opts[] = {
+const struct fw3_option fw3_rule_opts[] = {
 	FW3_OPT("name",                string,   rule,     name),
 	FW3_OPT("family",              family,   rule,     family),
 
@@ -44,6 +44,8 @@ static struct fw3_option rule_opts[] = {
 	FW3_OPT("limit_burst",         int,      rule,     limit.burst),
 
 	FW3_OPT("target",              target,   rule,     target),
+
+	{ }
 };
 
 
@@ -81,7 +83,7 @@ fw3_load_rules(struct fw3_state *state, struct uci_package *p)
 
 		INIT_LIST_HEAD(&rule->icmp_type);
 
-		fw3_parse_options(rule, rule_opts, ARRAY_SIZE(rule_opts), s);
+		fw3_parse_options(rule, fw3_rule_opts, s);
 
 		if (rule->src.invert || rule->dest.invert)
 		{
@@ -331,20 +333,3 @@ fw3_print_rules(enum fw3_table table, enum fw3_family family,
 	list_for_each_entry(rule, &state->rules, list)
 		expand_rule(table, family, rule, num++);
 }
-
-void
-fw3_free_rule(struct fw3_rule *rule)
-{
-	fw3_free_list(&rule->proto);
-
-	fw3_free_list(&rule->ip_src);
-	fw3_free_list(&rule->mac_src);
-	fw3_free_list(&rule->port_dest);
-
-	fw3_free_list(&rule->ip_dest);
-	fw3_free_list(&rule->port_dest);
-
-	fw3_free_list(&rule->icmp_type);
-
-	free(rule);
-}
diff --git a/rules.h b/rules.h
index db93220..38d0df7 100644
--- a/rules.h
+++ b/rules.h
@@ -24,10 +24,13 @@
 #include "ipsets.h"
 #include "utils.h"
 
+extern const struct fw3_option fw3_rule_opts[];
+
 void fw3_load_rules(struct fw3_state *state, struct uci_package *p);
 void fw3_print_rules(enum fw3_table table, enum fw3_family family,
                      struct fw3_state *state);
 
-void fw3_free_rule(struct fw3_rule *rule);
+#define fw3_free_rule(rule) \
+	fw3_free_object(rule, fw3_rule_opts)
 
 #endif
diff --git a/utils.c b/utils.c
index c9ca206..f01ba73 100644
--- a/utils.c
+++ b/utils.c
@@ -483,3 +483,15 @@ fw3_set_running(void *object, struct list_head *dest)
 	else if (!dest && o->running_list.next)
 		list_del(&o->running_list);
 }
+
+void
+fw3_free_object(void *obj, const void *opts)
+{
+	const struct fw3_option *ol;
+
+	for (ol = opts; ol->name; ol++)
+		if (ol->elem_size)
+			fw3_free_list((struct list_head *)((char *)obj + ol->offset));
+
+	free(obj);
+}
diff --git a/utils.h b/utils.h
index f157daf..43e2a22 100644
--- a/utils.h
+++ b/utils.h
@@ -92,4 +92,6 @@ void fw3_write_statefile(void *state);
 
 void fw3_set_running(void *object, struct list_head *dest);
 
+void fw3_free_object(void *obj, const void *opts);
+
 #endif
diff --git a/zones.c b/zones.c
index 317acc8..576ad42 100644
--- a/zones.c
+++ b/zones.c
@@ -51,7 +51,7 @@ static const struct chain dst_chains[] = {
 	C(ANY, RAW,    NOTRACK, "zone_%s_notrack"),
 };
 
-static struct fw3_option zone_opts[] = {
+const struct fw3_option fw3_zone_opts[] = {
 	FW3_OPT("name",                string,   zone,     name),
 	FW3_OPT("family",              family,   zone,     family),
 
@@ -77,6 +77,8 @@ static struct fw3_option zone_opts[] = {
 
 	FW3_OPT("log",                 bool,     zone,     log),
 	FW3_OPT("log_limit",           limit,    zone,     log_limit),
+
+	{ }
 };
 
 
@@ -189,7 +191,7 @@ fw3_load_zones(struct fw3_state *state, struct uci_package *p)
 		if (!zone)
 			continue;
 
-		fw3_parse_options(zone, zone_opts, ARRAY_SIZE(zone_opts), s);
+		fw3_parse_options(zone, fw3_zone_opts, s);
 
 		if (!zone->extra_dest)
 			zone->extra_dest = zone->extra_src;
@@ -520,16 +522,3 @@ fw3_lookup_zone(struct fw3_state *state, const char *name, bool running)
 
 	return NULL;
 }
-
-void
-fw3_free_zone(struct fw3_zone *zone)
-{
-	fw3_free_list(&zone->networks);
-	fw3_free_list(&zone->devices);
-	fw3_free_list(&zone->subnets);
-
-	fw3_free_list(&zone->masq_src);
-	fw3_free_list(&zone->masq_dest);
-
-	free(zone);
-}
diff --git a/zones.h b/zones.h
index c462ea8..84619c2 100644
--- a/zones.h
+++ b/zones.h
@@ -21,6 +21,8 @@
 
 #include "options.h"
 
+extern const struct fw3_option fw3_zone_opts[];
+
 struct fw3_zone * fw3_alloc_zone(void);
 
 void fw3_load_zones(struct fw3_state *state, struct uci_package *p);
@@ -37,6 +39,7 @@ void fw3_flush_zones(enum fw3_table table, enum fw3_family family,
 struct fw3_zone * fw3_lookup_zone(struct fw3_state *state, const char *name,
                                   bool running);
 
-void fw3_free_zone(struct fw3_zone *zone);
+#define fw3_free_zone(zone) \
+	fw3_free_object(zone, fw3_zone_opts)
 
 #endif
-- 
2.25.1