libxtables: Introduce global params structuring
introduce a new struct,xtables_globals, so as to
localize the globals used and help in symbol renames.
The applications must invoke xtables_set_params() before starting
to use any iptables APIs.
xtables_set_params() is intended to free xtables from depending
(as it does right now) on existence of such externally definitions
(from iptables/iptables6 etc). At the moment, xtables wont even
compile without presence of at least one of {iptables/iptables6 etc}
Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/xtables.h.in b/include/xtables.h.in
index 02750fb..61dbc76 100644
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -33,6 +33,14 @@
struct in_addr;
+struct xtables_globals
+{
+ unsigned int option_offset;
+ char *program_version;
+ char *program_name;
+ struct option *opts;
+};
+
/* Include file for additions: new matches and targets. */
struct xtables_match
{
@@ -195,6 +203,7 @@
extern int xtables_insmod(const char *, const char *, bool);
extern int xtables_load_ko(const char *, bool);
+int xtables_set_params(struct xtables_globals *xtp);
extern struct xtables_match *xtables_find_match(const char *name,
enum xtables_tryload, struct xtables_rule_match **match);
diff --git a/xtables.c b/xtables.c
index 6c95475..aad5e53 100644
--- a/xtables.c
+++ b/xtables.c
@@ -46,6 +46,28 @@
#define PROC_SYS_MODPROBE "/proc/sys/kernel/modprobe"
#endif
+struct xtables_globals *xt_params;
+/**
+ * xtables_set_params - set the global parameters used by xtables
+ * @xtp: input xtables_globals structure
+ *
+ * The app is expected to pass a valid xtables_globals data-filled
+ * with proper values
+ * @xtp cannot be NULL
+ *
+ * Returns -1 on failure to set and 0 on success
+ */
+int xtables_set_params(struct xtables_globals *xtp)
+{
+ if (!xtp) {
+ fprintf(stderr, "%s: Illegal global params\n",__func__);
+ return -1;
+ }
+
+ xt_params = xtp;
+ return 0;
+}
+
/**
* xtables_afinfo - protocol family dependent information
* @kmod: kernel module basename (e.g. "ip_tables")