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-rw-r--r--package/network/utils/nftables/patches/200-src-support-for-flowtable-listing.patch515
1 files changed, 515 insertions, 0 deletions
diff --git a/package/network/utils/nftables/patches/200-src-support-for-flowtable-listing.patch b/package/network/utils/nftables/patches/200-src-support-for-flowtable-listing.patch
new file mode 100644
index 0000000000..259513de8b
--- /dev/null
+++ b/package/network/utils/nftables/patches/200-src-support-for-flowtable-listing.patch
@@ -0,0 +1,515 @@
+From: Pablo Neira Ayuso <pablo@netfilter.org>
+Date: Mon, 4 Dec 2017 13:28:25 +0100
+Subject: [PATCH] src: support for flowtable listing
+
+This patch allows you to dump existing flowtable.
+
+ # nft list ruleset
+ table ip x {
+ flowtable x {
+ hook ingress priority 10
+ devices = { eth0, tap0 }
+ }
+ }
+
+You can also list existing flowtables via:
+
+ # nft list flowtables
+ table ip x {
+ flowtable x {
+ hook ingress priority 10
+ devices = { eth0, tap0 }
+ }
+ }
+
+ You need a Linux kernel >= 4.16-rc to test this new feature.
+
+Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
+---
+
+--- a/include/linux/netfilter/nf_tables.h
++++ b/include/linux/netfilter/nf_tables.h
+@@ -92,6 +92,9 @@ enum nft_verdicts {
+ * @NFT_MSG_GETOBJ: get a stateful object (enum nft_obj_attributes)
+ * @NFT_MSG_DELOBJ: delete a stateful object (enum nft_obj_attributes)
+ * @NFT_MSG_GETOBJ_RESET: get and reset a stateful object (enum nft_obj_attributes)
++ * @NFT_MSG_NEWFLOWTABLE: add new flow table (enum nft_flowtable_attributes)
++ * @NFT_MSG_GETFLOWTABLE: get flow table (enum nft_flowtable_attributes)
++ * @NFT_MSG_DELFLOWTABLE: delete flow table (enum nft_flowtable_attributes)
+ */
+ enum nf_tables_msg_types {
+ NFT_MSG_NEWTABLE,
+@@ -116,6 +119,9 @@ enum nf_tables_msg_types {
+ NFT_MSG_GETOBJ,
+ NFT_MSG_DELOBJ,
+ NFT_MSG_GETOBJ_RESET,
++ NFT_MSG_NEWFLOWTABLE,
++ NFT_MSG_GETFLOWTABLE,
++ NFT_MSG_DELFLOWTABLE,
+ NFT_MSG_MAX,
+ };
+
+--- a/include/mnl.h
++++ b/include/mnl.h
+@@ -89,6 +89,9 @@ int mnl_nft_obj_batch_add(struct nftnl_o
+ int mnl_nft_obj_batch_del(struct nftnl_obj *nln, struct nftnl_batch *batch,
+ unsigned int flags, uint32_t seqnum);
+
++struct nftnl_flowtable_list *
++mnl_nft_flowtable_dump(struct netlink_ctx *ctx, int family, const char *table);
++
+ struct nftnl_ruleset *mnl_nft_ruleset_dump(struct netlink_ctx *ctx,
+ uint32_t family);
+ int mnl_nft_event_listener(struct mnl_socket *nf_sock, unsigned int debug_mask,
+--- a/include/netlink.h
++++ b/include/netlink.h
+@@ -179,6 +179,10 @@ extern int netlink_add_obj(struct netlin
+ extern int netlink_delete_obj(struct netlink_ctx *ctx, const struct handle *h,
+ struct location *loc, uint32_t type);
+
++extern int netlink_list_flowtables(struct netlink_ctx *ctx,
++ const struct handle *h,
++ const struct location *loc);
++
+ extern void netlink_dump_chain(const struct nftnl_chain *nlc,
+ struct netlink_ctx *ctx);
+ extern void netlink_dump_rule(const struct nftnl_rule *nlr,
+--- a/include/rule.h
++++ b/include/rule.h
+@@ -35,6 +35,7 @@ struct position_spec {
+ * @chain: chain name (chains and rules only)
+ * @set: set name (sets only)
+ * @obj: stateful object name (stateful object only)
++ * @flowtable: flow table name (flow table only)
+ * @handle: rule handle (rules only)
+ * @position: rule position (rules only)
+ * @set_id: set ID (sets only)
+@@ -45,6 +46,7 @@ struct handle {
+ const char *chain;
+ const char *set;
+ const char *obj;
++ const char *flowtable;
+ struct handle_spec handle;
+ struct position_spec position;
+ uint32_t set_id;
+@@ -98,6 +100,7 @@ enum table_flags {
+ * @chains: chains contained in the table
+ * @sets: sets contained in the table
+ * @objs: stateful objects contained in the table
++ * @flowtables: flow tables contained in the table
+ * @flags: table flags
+ * @refcnt: table reference counter
+ */
+@@ -109,6 +112,7 @@ struct table {
+ struct list_head chains;
+ struct list_head sets;
+ struct list_head objs;
++ struct list_head flowtables;
+ enum table_flags flags;
+ unsigned int refcnt;
+ };
+@@ -315,6 +319,24 @@ void obj_print_plain(const struct obj *o
+ const char *obj_type_name(uint32_t type);
+ uint32_t obj_type_to_cmd(uint32_t type);
+
++struct flowtable {
++ struct list_head list;
++ struct handle handle;
++ struct location location;
++ unsigned int hooknum;
++ int priority;
++ const char **dev_array;
++ int dev_array_len;
++ unsigned int refcnt;
++};
++
++extern struct flowtable *flowtable_alloc(const struct location *loc);
++extern struct flowtable *flowtable_get(struct flowtable *flowtable);
++extern void flowtable_free(struct flowtable *flowtable);
++extern void flowtable_add_hash(struct flowtable *flowtable, struct table *table);
++
++void flowtable_print(const struct flowtable *n, struct output_ctx *octx);
++
+ /**
+ * enum cmd_ops - command operations
+ *
+@@ -373,6 +395,7 @@ enum cmd_ops {
+ * @CMD_OBJ_QUOTAS: multiple quotas
+ * @CMD_OBJ_LIMIT: limit
+ * @CMD_OBJ_LIMITS: multiple limits
++ * @CMD_OBJ_FLOWTABLES: flow tables
+ */
+ enum cmd_obj {
+ CMD_OBJ_INVALID,
+@@ -399,6 +422,7 @@ enum cmd_obj {
+ CMD_OBJ_CT_HELPERS,
+ CMD_OBJ_LIMIT,
+ CMD_OBJ_LIMITS,
++ CMD_OBJ_FLOWTABLES,
+ };
+
+ struct markup {
+--- a/src/evaluate.c
++++ b/src/evaluate.c
+@@ -3196,6 +3196,7 @@ static int cmd_evaluate_list(struct eval
+ case CMD_OBJ_CT_HELPERS:
+ case CMD_OBJ_LIMITS:
+ case CMD_OBJ_SETS:
++ case CMD_OBJ_FLOWTABLES:
+ if (cmd->handle.table == NULL)
+ return 0;
+ if (table_lookup(&cmd->handle, ctx->cache) == NULL)
+--- a/src/mnl.c
++++ b/src/mnl.c
+@@ -17,6 +17,7 @@
+ #include <libnftnl/expr.h>
+ #include <libnftnl/set.h>
+ #include <libnftnl/object.h>
++#include <libnftnl/flowtable.h>
+ #include <libnftnl/batch.h>
+
+ #include <linux/netfilter/nfnetlink.h>
+@@ -953,6 +954,63 @@ int mnl_nft_setelem_get(struct netlink_c
+ return nft_mnl_talk(ctx, nlh, nlh->nlmsg_len, set_elem_cb, nls);
+ }
+
++static int flowtable_cb(const struct nlmsghdr *nlh, void *data)
++{
++ struct nftnl_flowtable_list *nln_list = data;
++ struct nftnl_flowtable *n;
++
++ if (check_genid(nlh) < 0)
++ return MNL_CB_ERROR;
++
++ n = nftnl_flowtable_alloc();
++ if (n == NULL)
++ memory_allocation_error();
++
++ if (nftnl_flowtable_nlmsg_parse(nlh, n) < 0)
++ goto err_free;
++
++ nftnl_flowtable_list_add_tail(n, nln_list);
++ return MNL_CB_OK;
++
++err_free:
++ nftnl_flowtable_free(n);
++ return MNL_CB_OK;
++}
++
++struct nftnl_flowtable_list *
++mnl_nft_flowtable_dump(struct netlink_ctx *ctx, int family, const char *table)
++{
++ struct nftnl_flowtable_list *nln_list;
++ char buf[MNL_SOCKET_BUFFER_SIZE];
++ struct nftnl_flowtable *n;
++ struct nlmsghdr *nlh;
++ int ret;
++
++ n = nftnl_flowtable_alloc();
++ if (n == NULL)
++ memory_allocation_error();
++
++ nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETFLOWTABLE, family,
++ NLM_F_DUMP | NLM_F_ACK, ctx->seqnum);
++ if (table != NULL)
++ nftnl_flowtable_set_str(n, NFTNL_FLOWTABLE_TABLE, table);
++ nftnl_flowtable_nlmsg_build_payload(nlh, n);
++ nftnl_flowtable_free(n);
++
++ nln_list = nftnl_flowtable_list_alloc();
++ if (nln_list == NULL)
++ memory_allocation_error();
++
++ ret = nft_mnl_talk(ctx, nlh, nlh->nlmsg_len, flowtable_cb, nln_list);
++ if (ret < 0)
++ goto err;
++
++ return nln_list;
++err:
++ nftnl_flowtable_list_free(nln_list);
++ return NULL;
++}
++
+ /*
+ * ruleset
+ */
+--- a/src/netlink.c
++++ b/src/netlink.c
+@@ -23,6 +23,7 @@
+ #include <libnftnl/expr.h>
+ #include <libnftnl/object.h>
+ #include <libnftnl/set.h>
++#include <libnftnl/flowtable.h>
+ #include <libnftnl/udata.h>
+ #include <libnftnl/ruleset.h>
+ #include <libnftnl/common.h>
+@@ -1826,6 +1827,70 @@ int netlink_reset_objs(struct netlink_ct
+ return err;
+ }
+
++static struct flowtable *
++netlink_delinearize_flowtable(struct netlink_ctx *ctx,
++ struct nftnl_flowtable *nlo)
++{
++ struct flowtable *flowtable;
++ const char **dev_array;
++ int len = 0, i;
++
++ flowtable = flowtable_alloc(&netlink_location);
++ flowtable->handle.family =
++ nftnl_flowtable_get_u32(nlo, NFTNL_FLOWTABLE_FAMILY);
++ flowtable->handle.table =
++ xstrdup(nftnl_flowtable_get_str(nlo, NFTNL_FLOWTABLE_TABLE));
++ flowtable->handle.flowtable =
++ xstrdup(nftnl_flowtable_get_str(nlo, NFTNL_FLOWTABLE_NAME));
++ dev_array = nftnl_flowtable_get_array(nlo, NFTNL_FLOWTABLE_DEVICES);
++ while (dev_array[len] != '\0')
++ len++;
++
++ flowtable->dev_array = calloc(1, len * sizeof(char *));
++ for (i = 0; i < len; i++)
++ flowtable->dev_array[i] = xstrdup(dev_array[i]);
++
++ flowtable->dev_array_len = len;
++
++ flowtable->priority =
++ nftnl_flowtable_get_u32(nlo, NFTNL_FLOWTABLE_PRIO);
++ flowtable->hooknum =
++ nftnl_flowtable_get_u32(nlo, NFTNL_FLOWTABLE_HOOKNUM);
++
++ return flowtable;
++}
++
++static int list_flowtable_cb(struct nftnl_flowtable *nls, void *arg)
++{
++ struct netlink_ctx *ctx = arg;
++ struct flowtable *flowtable;
++
++ flowtable = netlink_delinearize_flowtable(ctx, nls);
++ if (flowtable == NULL)
++ return -1;
++ list_add_tail(&flowtable->list, &ctx->list);
++ return 0;
++}
++
++int netlink_list_flowtables(struct netlink_ctx *ctx, const struct handle *h,
++ const struct location *loc)
++{
++ struct nftnl_flowtable_list *flowtable_cache;
++ int err;
++
++ flowtable_cache = mnl_nft_flowtable_dump(ctx, h->family, h->table);
++ if (flowtable_cache == NULL) {
++ if (errno == EINTR)
++ return -1;
++
++ return 0;
++ }
++
++ err = nftnl_flowtable_list_foreach(flowtable_cache, list_flowtable_cb, ctx);
++ nftnl_flowtable_list_free(flowtable_cache);
++ return err;
++}
++
+ int netlink_batch_send(struct netlink_ctx *ctx, struct list_head *err_list)
+ {
+ return mnl_batch_talk(ctx, err_list);
+--- a/src/parser_bison.y
++++ b/src/parser_bison.y
+@@ -248,6 +248,8 @@ int nft_lex(void *, void *, void *);
+ %token METER "meter"
+ %token METERS "meters"
+
++%token FLOWTABLES "flowtables"
++
+ %token <val> NUM "number"
+ %token <string> STRING "string"
+ %token <string> QUOTED_STRING "quoted string"
+@@ -1104,6 +1106,10 @@ list_cmd : TABLE table_spec
+ {
+ $$ = cmd_alloc(CMD_LIST, CMD_OBJ_METER, &$2, &@$, NULL);
+ }
++ | FLOWTABLES ruleset_spec
++ {
++ $$ = cmd_alloc(CMD_LIST, CMD_OBJ_FLOWTABLES, &$2, &@$, NULL);
++ }
+ | MAPS ruleset_spec
+ {
+ $$ = cmd_alloc(CMD_LIST, CMD_OBJ_MAPS, &$2, &@$, NULL);
+--- a/src/rule.c
++++ b/src/rule.c
+@@ -95,6 +95,11 @@ static int cache_init_objects(struct net
+ return -1;
+ list_splice_tail_init(&ctx->list, &table->chains);
+
++ ret = netlink_list_flowtables(ctx, &table->handle, &internal_location);
++ if (ret < 0)
++ return -1;
++ list_splice_tail_init(&ctx->list, &table->flowtables);
++
+ if (cmd != CMD_RESET) {
+ ret = netlink_list_objs(ctx, &table->handle, &internal_location);
+ if (ret < 0)
+@@ -722,6 +727,7 @@ struct table *table_alloc(void)
+ init_list_head(&table->chains);
+ init_list_head(&table->sets);
+ init_list_head(&table->objs);
++ init_list_head(&table->flowtables);
+ init_list_head(&table->scope.symbols);
+ table->refcnt = 1;
+
+@@ -797,6 +803,7 @@ static void table_print_options(const st
+
+ static void table_print(const struct table *table, struct output_ctx *octx)
+ {
++ struct flowtable *flowtable;
+ struct chain *chain;
+ struct obj *obj;
+ struct set *set;
+@@ -818,6 +825,11 @@ static void table_print(const struct tab
+ set_print(set, octx);
+ delim = "\n";
+ }
++ list_for_each_entry(flowtable, &table->flowtables, list) {
++ nft_print(octx, "%s", delim);
++ flowtable_print(flowtable, octx);
++ delim = "\n";
++ }
+ list_for_each_entry(chain, &table->chains, list) {
+ nft_print(octx, "%s", delim);
+ chain_print(chain, octx);
+@@ -1481,6 +1493,114 @@ static int do_list_obj(struct netlink_ct
+ return 0;
+ }
+
++struct flowtable *flowtable_alloc(const struct location *loc)
++{
++ struct flowtable *flowtable;
++
++ flowtable = xzalloc(sizeof(*flowtable));
++ if (loc != NULL)
++ flowtable->location = *loc;
++
++ flowtable->refcnt = 1;
++ return flowtable;
++}
++
++struct flowtable *flowtable_get(struct flowtable *flowtable)
++{
++ flowtable->refcnt++;
++ return flowtable;
++}
++
++void flowtable_free(struct flowtable *flowtable)
++{
++ if (--flowtable->refcnt > 0)
++ return;
++ handle_free(&flowtable->handle);
++ xfree(flowtable);
++}
++
++void flowtable_add_hash(struct flowtable *flowtable, struct table *table)
++{
++ list_add_tail(&flowtable->list, &table->flowtables);
++}
++
++static void flowtable_print_declaration(const struct flowtable *flowtable,
++ struct print_fmt_options *opts,
++ struct output_ctx *octx)
++{
++ int i;
++
++ nft_print(octx, "%sflowtable", opts->tab);
++
++ if (opts->family != NULL)
++ nft_print(octx, " %s", opts->family);
++
++ if (opts->table != NULL)
++ nft_print(octx, " %s", opts->table);
++
++ nft_print(octx, " %s {%s", flowtable->handle.flowtable, opts->nl);
++
++ nft_print(octx, "%s%shook %s priority %d%s",
++ opts->tab, opts->tab, "ingress",
++ flowtable->priority, opts->stmt_separator);
++
++ nft_print(octx, "%s%sdevices = { ", opts->tab, opts->tab);
++ for (i = 0; i < flowtable->dev_array_len; i++) {
++ nft_print(octx, "%s", flowtable->dev_array[i]);
++ if (i + 1 != flowtable->dev_array_len)
++ nft_print(octx, ", ");
++ }
++ nft_print(octx, " }%s", opts->stmt_separator);
++}
++
++static void do_flowtable_print(const struct flowtable *flowtable,
++ struct print_fmt_options *opts,
++ struct output_ctx *octx)
++{
++ flowtable_print_declaration(flowtable, opts, octx);
++ nft_print(octx, "%s}%s", opts->tab, opts->nl);
++}
++
++void flowtable_print(const struct flowtable *s, struct output_ctx *octx)
++{
++ struct print_fmt_options opts = {
++ .tab = "\t",
++ .nl = "\n",
++ .stmt_separator = "\n",
++ };
++
++ do_flowtable_print(s, &opts, octx);
++}
++
++static int do_list_flowtables(struct netlink_ctx *ctx, struct cmd *cmd)
++{
++ struct print_fmt_options opts = {
++ .tab = "\t",
++ .nl = "\n",
++ .stmt_separator = "\n",
++ };
++ struct flowtable *flowtable;
++ struct table *table;
++
++ list_for_each_entry(table, &ctx->cache->list, list) {
++ if (cmd->handle.family != NFPROTO_UNSPEC &&
++ cmd->handle.family != table->handle.family)
++ continue;
++
++ nft_print(ctx->octx, "table %s %s {\n",
++ family2str(table->handle.family),
++ table->handle.table);
++
++ list_for_each_entry(flowtable, &table->flowtables, list) {
++ flowtable_print_declaration(flowtable, &opts, ctx->octx);
++ nft_print(ctx->octx, "%s}%s", opts.tab, opts.nl);
++ }
++
++ nft_print(ctx->octx, "}\n");
++ }
++ return 0;
++}
++
+ static int do_list_ruleset(struct netlink_ctx *ctx, struct cmd *cmd)
+ {
+ unsigned int family = cmd->handle.family;
+@@ -1628,6 +1748,8 @@ static int do_command_list(struct netlin
+ case CMD_OBJ_LIMIT:
+ case CMD_OBJ_LIMITS:
+ return do_list_obj(ctx, cmd, NFT_OBJECT_LIMIT);
++ case CMD_OBJ_FLOWTABLES:
++ return do_list_flowtables(ctx, cmd);
+ default:
+ BUG("invalid command object type %u\n", cmd->obj);
+ }
+--- a/src/scanner.l
++++ b/src/scanner.l
+@@ -297,6 +297,8 @@ addrstring ({macaddr}|{ip4addr}|{ip6addr
+ "meter" { return METER; }
+ "meters" { return METERS; }
+
++"flowtables" { return FLOWTABLES; }
++
+ "counter" { return COUNTER; }
+ "name" { return NAME; }
+ "packets" { return PACKETS; }
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