Adding upstream version 1.2.6.upstream/1.2.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 154 insertions, 0 deletions

diff --git a/src/obj/ct_helper.c b/src/obj/ct_helper.c
new file mode 100644
index 0000000..a31bd6f
--- /dev/null
+++ b/src/obj/ct_helper.c
@@ -0,0 +1,154 @@
+/*
+ * (C) 2017 Red Hat GmbH
+ * Author: Florian Westphal <fw@strlen.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <inttypes.h>
+
+#include <linux/netfilter/nf_tables.h>
+
+#include "internal.h"
+#include <libmnl/libmnl.h>
+#include <libnftnl/object.h>
+
+#include "obj.h"
+
+static int nftnl_obj_ct_helper_set(struct nftnl_obj *e, uint16_t type,
+				   const void *data, uint32_t data_len)
+{
+	struct nftnl_obj_ct_helper *helper = nftnl_obj_data(e);
+
+	switch (type) {
+	case NFTNL_OBJ_CT_HELPER_NAME:
+		snprintf(helper->name, sizeof(helper->name), "%s", (const char *)data);
+		break;
+	case NFTNL_OBJ_CT_HELPER_L3PROTO:
+		memcpy(&helper->l3proto, data, sizeof(helper->l3proto));
+		break;
+	case NFTNL_OBJ_CT_HELPER_L4PROTO:
+		memcpy(&helper->l4proto, data, sizeof(helper->l4proto));
+		break;
+	default:
+		return -1;
+	}
+	return 0;
+}
+
+static const void *nftnl_obj_ct_helper_get(const struct nftnl_obj *e,
+					   uint16_t type, uint32_t *data_len)
+{
+	struct nftnl_obj_ct_helper *helper = nftnl_obj_data(e);
+
+	switch (type) {
+	case NFTNL_OBJ_CT_HELPER_NAME:
+		*data_len = strlen(helper->name);
+		return helper->name;
+	case NFTNL_OBJ_CT_HELPER_L3PROTO:
+		*data_len = sizeof(helper->l3proto);
+		return &helper->l3proto;
+	case NFTNL_OBJ_CT_HELPER_L4PROTO:
+		*data_len = sizeof(helper->l4proto);
+		return &helper->l4proto;
+	}
+	return NULL;
+}
+
+static int nftnl_obj_ct_helper_cb(const struct nlattr *attr, void *data)
+{
+	const struct nftnl_obj_ct_helper *helper = NULL;
+	int type = mnl_attr_get_type(attr);
+	const struct nlattr **tb = data;
+
+	if (mnl_attr_type_valid(attr, NFTA_CT_HELPER_MAX) < 0)
+		return MNL_CB_OK;
+
+	switch (type) {
+	case NFTA_CT_HELPER_NAME:
+		if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
+			abi_breakage();
+		if (mnl_attr_get_payload_len(attr) >= sizeof(helper->name))
+			abi_breakage();
+		break;
+	case NFTA_CT_HELPER_L3PROTO:
+		if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
+			abi_breakage();
+		break;
+	case NFTA_CT_HELPER_L4PROTO:
+		if (mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
+			abi_breakage();
+		break;
+	}
+
+	tb[type] = attr;
+	return MNL_CB_OK;
+}
+
+static void
+nftnl_obj_ct_helper_build(struct nlmsghdr *nlh, const struct nftnl_obj *e)
+{
+	struct nftnl_obj_ct_helper *helper = nftnl_obj_data(e);
+
+	if (e->flags & (1 << NFTNL_OBJ_CT_HELPER_NAME))
+		mnl_attr_put_str(nlh, NFTA_CT_HELPER_NAME, helper->name);
+	if (e->flags & (1 << NFTNL_OBJ_CT_HELPER_L3PROTO))
+		mnl_attr_put_u16(nlh, NFTA_CT_HELPER_L3PROTO, htons(helper->l3proto));
+	if (e->flags & (1 << NFTNL_OBJ_CT_HELPER_L4PROTO))
+		mnl_attr_put_u8(nlh, NFTA_CT_HELPER_L4PROTO, helper->l4proto);
+}
+
+static int
+nftnl_obj_ct_helper_parse(struct nftnl_obj *e, struct nlattr *attr)
+{
+	struct nftnl_obj_ct_helper *helper = nftnl_obj_data(e);
+	struct nlattr *tb[NFTA_CT_HELPER_MAX + 1] = {};
+
+	if (mnl_attr_parse_nested(attr, nftnl_obj_ct_helper_cb, tb) < 0)
+		return -1;
+
+	if (tb[NFTA_CT_HELPER_NAME]) {
+		snprintf(helper->name, sizeof(helper->name), "%s",
+			 mnl_attr_get_str(tb[NFTA_CT_HELPER_NAME]));
+		e->flags |= (1 << NFTNL_OBJ_CT_HELPER_NAME);
+	}
+	if (tb[NFTA_CT_HELPER_L3PROTO]) {
+		helper->l3proto = ntohs(mnl_attr_get_u16(tb[NFTA_CT_HELPER_L3PROTO]));
+		e->flags |= (1 << NFTNL_OBJ_CT_HELPER_L3PROTO);
+	}
+	if (tb[NFTA_CT_HELPER_L4PROTO]) {
+		helper->l4proto = mnl_attr_get_u8(tb[NFTA_CT_HELPER_L4PROTO]);
+		e->flags |= (1 << NFTNL_OBJ_CT_HELPER_L4PROTO);
+	}
+
+	return 0;
+}
+
+static int nftnl_obj_ct_helper_snprintf(char *buf, size_t len,
+				       uint32_t flags,
+				       const struct nftnl_obj *e)
+{
+	struct nftnl_obj_ct_helper *helper = nftnl_obj_data(e);
+
+	return snprintf(buf, len, "name %s family %d protocol %d ",
+			helper->name, helper->l3proto, helper->l4proto);
+}
+
+struct obj_ops obj_ops_ct_helper = {
+	.name		= "ct_helper",
+	.type		= NFT_OBJECT_CT_HELPER,
+	.alloc_len	= sizeof(struct nftnl_obj_ct_helper),
+	.max_attr	= NFTA_CT_HELPER_MAX,
+	.set		= nftnl_obj_ct_helper_set,
+	.get		= nftnl_obj_ct_helper_get,
+	.parse		= nftnl_obj_ct_helper_parse,
+	.build		= nftnl_obj_ct_helper_build,
+	.output		= nftnl_obj_ct_helper_snprintf,
+};