libnftnl: backport flowtable support
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
parent
c8d07575e5
commit
8cdc71fc92
@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
|
||||
|
||||
PKG_NAME:=libnftnl
|
||||
PKG_VERSION:=1.0.9
|
||||
PKG_RELEASE:=1
|
||||
PKG_RELEASE:=2
|
||||
|
||||
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
|
||||
PKG_SOURCE_URL:=https://netfilter.org/projects/$(PKG_NAME)/files
|
||||
|
||||
1444
package/libs/libnftnl/patches/100-src-add-flowtable-support.patch
Normal file
1444
package/libs/libnftnl/patches/100-src-add-flowtable-support.patch
Normal file
File diff suppressed because it is too large
Load Diff
@ -0,0 +1,259 @@
|
||||
From: Pablo Neira Ayuso <pablo@netfilter.org>
|
||||
Date: Sun, 3 Dec 2017 21:05:54 +0100
|
||||
Subject: [PATCH] expr: add flow offload expression
|
||||
|
||||
This patch adds the new "flow_offload" expression to select what flows
|
||||
are offloaded to an existing flowtable.
|
||||
|
||||
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
|
||||
---
|
||||
create mode 100644 src/expr/flow_offload.c
|
||||
|
||||
--- a/include/libnftnl/expr.h
|
||||
+++ b/include/libnftnl/expr.h
|
||||
@@ -221,6 +221,10 @@ enum {
|
||||
};
|
||||
|
||||
enum {
|
||||
+ NFTNL_EXPR_FLOW_TABLE_NAME = NFTNL_EXPR_BASE,
|
||||
+};
|
||||
+
|
||||
+enum {
|
||||
NFTNL_EXPR_FWD_SREG_DEV = NFTNL_EXPR_BASE,
|
||||
};
|
||||
|
||||
--- a/include/linux/netfilter/nf_tables.h
|
||||
+++ b/include/linux/netfilter/nf_tables.h
|
||||
@@ -952,6 +952,17 @@ enum nft_ct_attributes {
|
||||
};
|
||||
#define NFTA_CT_MAX (__NFTA_CT_MAX - 1)
|
||||
|
||||
+/**
|
||||
+ * enum nft_flow_attributes - ct offload expression attributes
|
||||
+ * @NFTA_FLOW_TABLE_NAME: flow table name (NLA_STRING)
|
||||
+ */
|
||||
+enum nft_offload_attributes {
|
||||
+ NFTA_FLOW_UNSPEC,
|
||||
+ NFTA_FLOW_TABLE_NAME,
|
||||
+ __NFTA_FLOW_MAX,
|
||||
+};
|
||||
+#define NFTA_FLOW_MAX (__NFTA_FLOW_MAX - 1)
|
||||
+
|
||||
enum nft_limit_type {
|
||||
NFT_LIMIT_PKTS,
|
||||
NFT_LIMIT_PKT_BYTES
|
||||
--- a/src/Makefile.am
|
||||
+++ b/src/Makefile.am
|
||||
@@ -32,6 +32,7 @@ libnftnl_la_SOURCES = utils.c \
|
||||
expr/data_reg.c \
|
||||
expr/dup.c \
|
||||
expr/exthdr.c \
|
||||
+ expr/flow_offload.c \
|
||||
expr/fib.c \
|
||||
expr/fwd.c \
|
||||
expr/limit.c \
|
||||
--- /dev/null
|
||||
+++ b/src/expr/flow_offload.c
|
||||
@@ -0,0 +1,184 @@
|
||||
+#include "internal.h"
|
||||
+
|
||||
+#include <stdio.h>
|
||||
+#include <stdint.h>
|
||||
+#include <string.h> /* for memcpy */
|
||||
+#include <arpa/inet.h>
|
||||
+#include <errno.h>
|
||||
+#include <libmnl/libmnl.h>
|
||||
+#include <linux/netfilter/nf_tables.h>
|
||||
+#include <libnftnl/rule.h>
|
||||
+#include <libnftnl/expr.h>
|
||||
+
|
||||
+struct nftnl_expr_flow {
|
||||
+ char *table_name;
|
||||
+};
|
||||
+
|
||||
+static int nftnl_expr_flow_set(struct nftnl_expr *e, uint16_t type,
|
||||
+ const void *data, uint32_t data_len)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *flow = nftnl_expr_data(e);
|
||||
+
|
||||
+ switch (type) {
|
||||
+ case NFTNL_EXPR_FLOW_TABLE_NAME:
|
||||
+ flow->table_name = strdup((const char *)data);
|
||||
+ if (!flow->table_name)
|
||||
+ return -1;
|
||||
+ break;
|
||||
+ default:
|
||||
+ return -1;
|
||||
+ }
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static const void *nftnl_expr_flow_get(const struct nftnl_expr *e,
|
||||
+ uint16_t type, uint32_t *data_len)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *flow = nftnl_expr_data(e);
|
||||
+
|
||||
+ switch(type) {
|
||||
+ case NFTNL_EXPR_FLOW_TABLE_NAME:
|
||||
+ *data_len = strlen(flow->table_name) + 1;
|
||||
+ return flow->table_name;
|
||||
+ }
|
||||
+ return NULL;
|
||||
+}
|
||||
+
|
||||
+static int nftnl_expr_flow_cb(const struct nlattr *attr, void *data)
|
||||
+{
|
||||
+ const struct nlattr **tb = data;
|
||||
+ int type = mnl_attr_get_type(attr);
|
||||
+
|
||||
+ if (mnl_attr_type_valid(attr, NFTA_FLOW_MAX) < 0)
|
||||
+ return MNL_CB_OK;
|
||||
+
|
||||
+ switch(type) {
|
||||
+ case NFTA_FLOW_TABLE_NAME:
|
||||
+ if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
|
||||
+ abi_breakage();
|
||||
+ break;
|
||||
+ }
|
||||
+
|
||||
+ tb[type] = attr;
|
||||
+ return MNL_CB_OK;
|
||||
+}
|
||||
+
|
||||
+static void nftnl_expr_flow_build(struct nlmsghdr *nlh,
|
||||
+ const struct nftnl_expr *e)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *flow = nftnl_expr_data(e);
|
||||
+
|
||||
+ if (e->flags & (1 << NFTNL_EXPR_FLOW_TABLE_NAME))
|
||||
+ mnl_attr_put_strz(nlh, NFTA_FLOW_TABLE_NAME, flow->table_name);
|
||||
+}
|
||||
+
|
||||
+static int nftnl_expr_flow_parse(struct nftnl_expr *e, struct nlattr *attr)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *flow = nftnl_expr_data(e);
|
||||
+ struct nlattr *tb[NFTA_FLOW_MAX+1] = {};
|
||||
+ int ret = 0;
|
||||
+
|
||||
+ if (mnl_attr_parse_nested(attr, nftnl_expr_flow_cb, tb) < 0)
|
||||
+ return -1;
|
||||
+
|
||||
+ if (tb[NFTA_FLOW_TABLE_NAME]) {
|
||||
+ flow->table_name =
|
||||
+ strdup(mnl_attr_get_str(tb[NFTA_FLOW_TABLE_NAME]));
|
||||
+ if (!flow->table_name)
|
||||
+ return -1;
|
||||
+ e->flags |= (1 << NFTNL_EXPR_FLOW_TABLE_NAME);
|
||||
+ }
|
||||
+
|
||||
+ return ret;
|
||||
+}
|
||||
+
|
||||
+static int
|
||||
+nftnl_expr_flow_json_parse(struct nftnl_expr *e, json_t *root,
|
||||
+ struct nftnl_parse_err *err)
|
||||
+{
|
||||
+#ifdef JSON_PARSING
|
||||
+ const char *table_name;
|
||||
+
|
||||
+ table_name = nftnl_jansson_parse_str(root, "flowtable", err);
|
||||
+ if (table_name != NULL)
|
||||
+ nftnl_expr_set_str(e, NFTNL_EXPR_FLOW_TABLE_NAME, table_name);
|
||||
+
|
||||
+ return 0;
|
||||
+#else
|
||||
+ errno = EOPNOTSUPP;
|
||||
+ return -1;
|
||||
+#endif
|
||||
+}
|
||||
+
|
||||
+static int nftnl_expr_flow_export(char *buf, size_t size,
|
||||
+ const struct nftnl_expr *e, int type)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *l = nftnl_expr_data(e);
|
||||
+ NFTNL_BUF_INIT(b, buf, size);
|
||||
+
|
||||
+ if (e->flags & (1 << NFTNL_EXPR_FLOW_TABLE_NAME))
|
||||
+ nftnl_buf_str(&b, type, l->table_name, SET);
|
||||
+
|
||||
+ return nftnl_buf_done(&b);
|
||||
+}
|
||||
+
|
||||
+static int nftnl_expr_flow_snprintf_default(char *buf, size_t size,
|
||||
+ const struct nftnl_expr *e)
|
||||
+{
|
||||
+ int remain = size, offset = 0, ret;
|
||||
+ struct nftnl_expr_flow *l = nftnl_expr_data(e);
|
||||
+
|
||||
+ ret = snprintf(buf, remain, "flowtable %s ", l->table_name);
|
||||
+ SNPRINTF_BUFFER_SIZE(ret, remain, offset);
|
||||
+
|
||||
+ return offset;
|
||||
+}
|
||||
+
|
||||
+static int nftnl_expr_flow_snprintf(char *buf, size_t size, uint32_t type,
|
||||
+ uint32_t flags, const struct nftnl_expr *e)
|
||||
+{
|
||||
+ switch(type) {
|
||||
+ case NFTNL_OUTPUT_DEFAULT:
|
||||
+ return nftnl_expr_flow_snprintf_default(buf, size, e);
|
||||
+ case NFTNL_OUTPUT_XML:
|
||||
+ case NFTNL_OUTPUT_JSON:
|
||||
+ return nftnl_expr_flow_export(buf, size, e, type);
|
||||
+ default:
|
||||
+ break;
|
||||
+ }
|
||||
+ return -1;
|
||||
+}
|
||||
+
|
||||
+static void nftnl_expr_flow_free(const struct nftnl_expr *e)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *flow = nftnl_expr_data(e);
|
||||
+
|
||||
+ xfree(flow->table_name);
|
||||
+}
|
||||
+
|
||||
+static bool nftnl_expr_flow_cmp(const struct nftnl_expr *e1,
|
||||
+ const struct nftnl_expr *e2)
|
||||
+{
|
||||
+ struct nftnl_expr_flow *l1 = nftnl_expr_data(e1);
|
||||
+ struct nftnl_expr_flow *l2 = nftnl_expr_data(e2);
|
||||
+ bool eq = true;
|
||||
+
|
||||
+ if (e1->flags & (1 << NFTNL_EXPR_FLOW_TABLE_NAME))
|
||||
+ eq &= !strcmp(l1->table_name, l2->table_name);
|
||||
+
|
||||
+ return eq;
|
||||
+}
|
||||
+
|
||||
+struct expr_ops expr_ops_flow = {
|
||||
+ .name = "flow_offload",
|
||||
+ .alloc_len = sizeof(struct nftnl_expr_flow),
|
||||
+ .max_attr = NFTA_FLOW_MAX,
|
||||
+ .free = nftnl_expr_flow_free,
|
||||
+ .cmp = nftnl_expr_flow_cmp,
|
||||
+ .set = nftnl_expr_flow_set,
|
||||
+ .get = nftnl_expr_flow_get,
|
||||
+ .parse = nftnl_expr_flow_parse,
|
||||
+ .build = nftnl_expr_flow_build,
|
||||
+ .snprintf = nftnl_expr_flow_snprintf,
|
||||
+ .json_parse = nftnl_expr_flow_json_parse,
|
||||
+};
|
||||
--- a/src/expr_ops.c
|
||||
+++ b/src/expr_ops.c
|
||||
@@ -33,6 +33,7 @@ extern struct expr_ops expr_ops_target;
|
||||
extern struct expr_ops expr_ops_dynset;
|
||||
extern struct expr_ops expr_ops_hash;
|
||||
extern struct expr_ops expr_ops_fib;
|
||||
+extern struct expr_ops expr_ops_flow;
|
||||
|
||||
static struct expr_ops expr_ops_notrack = {
|
||||
.name = "notrack",
|
||||
@@ -69,6 +70,7 @@ static struct expr_ops *expr_ops[] = {
|
||||
&expr_ops_hash,
|
||||
&expr_ops_fib,
|
||||
&expr_ops_objref,
|
||||
+ &expr_ops_flow,
|
||||
NULL,
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user