libiptc: combine common types: _handle

No real API/ABI change incurred, since the definition of the structs'
types is not visible anyhow.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/libiptc/libip4tc.c b/libiptc/libip4tc.c
index b9e50c5..cf29238 100644
--- a/libiptc/libip4tc.c
+++ b/libiptc/libip4tc.c
@@ -47,9 +47,6 @@
 #define STRUCT_STANDARD_TARGET	struct ipt_standard_target
 #define STRUCT_REPLACE		struct ipt_replace
 
-#define STRUCT_TC_HANDLE	struct iptc_handle
-#define xtc_handle		iptc_handle
-
 #define ENTRY_ITERATE		IPT_ENTRY_ITERATE
 #define TABLE_MAXNAMELEN	IPT_TABLE_MAXNAMELEN
 #define FUNCTION_MAXNAMELEN	IPT_FUNCTION_MAXNAMELEN
@@ -123,7 +120,7 @@
 #define IP_PARTS(n) IP_PARTS_NATIVE(ntohl(n))
 
 static int
-dump_entry(struct ipt_entry *e, struct iptc_handle *const handle)
+dump_entry(struct ipt_entry *e, struct xtc_handle *const handle)
 {
 	size_t i;
 	STRUCT_ENTRY_TARGET *t;
@@ -238,7 +235,7 @@
 static inline int
 check_entry(const STRUCT_ENTRY *e, unsigned int *i, unsigned int *off,
 	    unsigned int user_offset, int *was_return,
-	    struct iptc_handle *h)
+	    struct xtc_handle *h)
 {
 	unsigned int toff;
 	STRUCT_STANDARD_TARGET *t;
@@ -314,7 +311,7 @@
 #ifdef IPTC_DEBUG
 /* Do every conceivable sanity check on the handle */
 static void
-do_check(struct iptc_handle *h, unsigned int line)
+do_check(struct xtc_handle *h, unsigned int line)
 {
 	unsigned int i, n;
 	unsigned int user_offset; /* Offset of first user chain */
diff --git a/libiptc/libip6tc.c b/libiptc/libip6tc.c
index 93366e2..636466f 100644
--- a/libiptc/libip6tc.c
+++ b/libiptc/libip6tc.c
@@ -45,9 +45,6 @@
 #define STRUCT_STANDARD_TARGET	struct ip6t_standard_target
 #define STRUCT_REPLACE		struct ip6t_replace
 
-#define STRUCT_TC_HANDLE	struct ip6tc_handle
-#define xtc_handle		ip6tc_handle
-
 #define ENTRY_ITERATE		IP6T_ENTRY_ITERATE
 #define TABLE_MAXNAMELEN	IP6T_TABLE_MAXNAMELEN
 #define FUNCTION_MAXNAMELEN	IP6T_FUNCTION_MAXNAMELEN
@@ -131,7 +128,7 @@
 }
 
 static int
-dump_entry(struct ip6t_entry *e, struct ip6tc_handle *const handle)
+dump_entry(struct ip6t_entry *e, struct xtc_handle *const handle)
 {
 	size_t i;
 	char buf[40];
diff --git a/libiptc/libiptc.c b/libiptc/libiptc.c
index 0a29a69..593c5de 100644
--- a/libiptc/libiptc.c
+++ b/libiptc/libiptc.c
@@ -121,8 +121,7 @@
 	unsigned int foot_offset;	/* offset in rule blob */
 };
 
-STRUCT_TC_HANDLE
-{
+struct xtc_handle {
 	int sockfd;
 	int changed;			 /* Have changes been made? */
 
@@ -1270,7 +1269,7 @@
 {
 	struct xtc_handle *h;
 
-	h = malloc(sizeof(STRUCT_TC_HANDLE));
+	h = malloc(sizeof(*h));
 	if (!h) {
 		errno = ENOMEM;
 		return NULL;