add generic netlink functions to swig

Provide wrapper function for generic netlink library functions. The
genlmsg_parse() function is handled similar to nla_parse_nested() so
it returns tuple with error code and dictionary of parsed attributes.

Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>

1 files changed, 97 insertions, 0 deletions

diff --git a/python/netlink/genl/capi.i b/python/netlink/genl/capi.i
index 229184b..069e617 100644
--- a/python/netlink/genl/capi.i
+++ b/python/netlink/genl/capi.i
@@ -9,3 +9,100 @@
 %include <stdint.i>
 %include <cstring.i>
 
+/* #include <netlink/genl/ctrl.h> */
+extern int genl_ctrl_alloc_cache(struct nl_sock *, struct nl_cache **o_cache);
+extern struct genl_family *genl_ctrl_search(struct nl_cache *, int);
+extern struct genl_family *genl_ctrl_search_by_name(struct nl_cache *,
+						    const char *);
+extern int genl_ctrl_resolve(struct nl_sock *, const char *);
+extern int genl_ctrl_resolve_grp(struct nl_sock *sk, const char *family,
+				 const char *grp);
+
+/* #include <netlink/genl/family.h> */
+extern struct genl_family *genl_family_alloc(void);
+extern void genl_family_put(struct genl_family *);
+
+extern unsigned int genl_family_get_id(struct genl_family *);
+extern void genl_family_set_id(struct genl_family *, unsigned int);
+extern char *genl_family_get_name(struct genl_family *);
+extern void genl_family_set_name(struct genl_family *, const char *name);
+extern uint8_t genl_family_get_version(struct genl_family *);
+extern void genl_family_set_version(struct genl_family *, uint8_t);
+extern uint32_t genl_family_get_hdrsize(struct genl_family *);
+extern void genl_family_set_hdrsize(struct genl_family *, uint32_t);
+extern uint32_t genl_family_get_maxattr(struct genl_family *);
+extern void genl_family_set_maxattr(struct genl_family *, uint32_t);
+
+extern int genl_family_add_op(struct genl_family *, int, int);
+extern int genl_family_add_grp(struct genl_family *, uint32_t , const char *);
+
+/* #include <netlink/genl/genl.h> */
+extern int genl_connect(struct nl_sock *);
+
+extern void *genlmsg_put(struct nl_msg *, uint32_t, uint32_t,
+			 int, int, int, uint8_t, uint8_t);
+
+struct nlattr {
+};
+
+struct nla_policy {
+	/** Type of attribute or NLA_UNSPEC */
+	uint16_t	type;
+
+	/** Minimal length of payload required */
+	uint16_t	minlen;
+
+	/** Maximal length of payload allowed */
+	uint16_t	maxlen;
+};
+
+%inline %{
+PyObject *py_genlmsg_parse(struct nlmsghdr *nlh, int uhl, int max,
+			   PyObject *p)
+{
+	struct nlattr *tb_msg[max + 1];
+	struct nla_policy *policy = NULL;
+	void *pol;
+	PyObject *attrs = Py_None;
+	PyObject *k;
+	PyObject *v;
+	PyObject *resobj;
+	int err;
+	int i;
+
+	if (p != Py_None) {
+		PyObject *pobj;
+
+		if (!PyList_Check(p)) {
+			fprintf(stderr, "expected list object\n");
+			err = -1;
+			goto fail;
+		}
+		pobj = PyList_GetItem(p, 0);
+		err = SWIG_ConvertPtr(pobj, &pol, SWIGTYPE_p_nla_policy, 0 |  0 );
+		if (!SWIG_IsOK(err))
+			goto fail;
+		policy = pol;
+	}
+	err = genlmsg_parse(nlh, uhl, tb_msg, max, policy);
+	if (err < 0) {
+		fprintf(stderr, "Failed to parse response message\n");
+	} else {
+		attrs = PyDict_New();
+		for (i = 0; i <= max; i++)
+			if (tb_msg[i]) {
+				k = PyInt_FromLong((long)i);
+				v = SWIG_NewPointerObj(SWIG_as_voidptr(tb_msg[i]), SWIGTYPE_p_nlattr, 0 |  0 );
+				PyDict_SetItem(attrs, k, v);
+			}
+	}
+fail:
+	if (attrs == Py_None)
+		Py_INCREF(Py_None);
+	resobj = Py_BuildValue("(iO)", err, attrs);
+	return resobj;
+}
+
+%}
+/* #include <netlink/genl/mngt.h> */
+/* nothing yet */