Adding upstream version 1.2.6.upstream/1.2.6upstream

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

1 files changed, 377 insertions, 0 deletions

diff --git a/src/expr/dynset.c b/src/expr/dynset.c
new file mode 100644
index 0000000..5bcf1c6
--- /dev/null
+++ b/src/expr/dynset.c
@@ -0,0 +1,377 @@
+/*
+ * Copyright (c) 2014, 2015 Patrick McHardy <kaber@trash.net>
+ *
+ * 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 "internal.h"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <libmnl/libmnl.h>
+#include <linux/netfilter/nf_tables.h>
+#include <libnftnl/rule.h>
+#include <libnftnl/expr.h>
+#include "data_reg.h"
+#include "expr_ops.h"
+
+struct nftnl_expr_dynset {
+	enum nft_registers	sreg_key;
+	enum nft_registers	sreg_data;
+	enum nft_dynset_ops	op;
+	uint64_t		timeout;
+	struct list_head	expr_list;
+	char			*set_name;
+	uint32_t		set_id;
+	uint32_t		dynset_flags;
+};
+
+static int
+nftnl_expr_dynset_set(struct nftnl_expr *e, uint16_t type,
+			 const void *data, uint32_t data_len)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nftnl_expr *expr, *next;
+
+	switch (type) {
+	case NFTNL_EXPR_DYNSET_SREG_KEY:
+		memcpy(&dynset->sreg_key, data, sizeof(dynset->sreg_key));
+		break;
+	case NFTNL_EXPR_DYNSET_SREG_DATA:
+		memcpy(&dynset->sreg_data, data, sizeof(dynset->sreg_data));
+		break;
+	case NFTNL_EXPR_DYNSET_OP:
+		memcpy(&dynset->op, data, sizeof(dynset->op));
+		break;
+	case NFTNL_EXPR_DYNSET_TIMEOUT:
+		memcpy(&dynset->timeout, data, sizeof(dynset->timeout));
+		break;
+	case NFTNL_EXPR_DYNSET_SET_NAME:
+		dynset->set_name = strdup((const char *)data);
+		if (!dynset->set_name)
+			return -1;
+		break;
+	case NFTNL_EXPR_DYNSET_SET_ID:
+		memcpy(&dynset->set_id, data, sizeof(dynset->set_id));
+		break;
+	case NFTNL_EXPR_DYNSET_EXPR:
+		list_for_each_entry_safe(expr, next, &dynset->expr_list, head)
+			nftnl_expr_free(expr);
+
+		expr = (void *)data;
+		list_add(&expr->head, &dynset->expr_list);
+		break;
+	case NFTNL_EXPR_DYNSET_FLAGS:
+		memcpy(&dynset->dynset_flags, data, sizeof(dynset->dynset_flags));
+		break;
+	default:
+		return -1;
+	}
+	return 0;
+}
+
+static const void *
+nftnl_expr_dynset_get(const struct nftnl_expr *e, uint16_t type,
+			 uint32_t *data_len)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nftnl_expr *expr;
+
+	switch (type) {
+	case NFTNL_EXPR_DYNSET_SREG_KEY:
+		*data_len = sizeof(dynset->sreg_key);
+		return &dynset->sreg_key;
+	case NFTNL_EXPR_DYNSET_SREG_DATA:
+		*data_len = sizeof(dynset->sreg_data);
+		return &dynset->sreg_data;
+	case NFTNL_EXPR_DYNSET_OP:
+		*data_len = sizeof(dynset->op);
+		return &dynset->op;
+	case NFTNL_EXPR_DYNSET_TIMEOUT:
+		*data_len = sizeof(dynset->timeout);
+		return &dynset->timeout;
+	case NFTNL_EXPR_DYNSET_SET_NAME:
+		*data_len = strlen(dynset->set_name) + 1;
+		return dynset->set_name;
+	case NFTNL_EXPR_DYNSET_SET_ID:
+		*data_len = sizeof(dynset->set_id);
+		return &dynset->set_id;
+	case NFTNL_EXPR_DYNSET_EXPR:
+		list_for_each_entry(expr, &dynset->expr_list, head)
+			break;
+		return expr;
+	case NFTNL_EXPR_DYNSET_FLAGS:
+		*data_len = sizeof(dynset->dynset_flags);
+		return &dynset->dynset_flags;
+	}
+	return NULL;
+}
+
+static int nftnl_expr_dynset_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_SET_MAX) < 0)
+		return MNL_CB_OK;
+
+	switch (type) {
+	case NFTA_DYNSET_SREG_KEY:
+	case NFTA_DYNSET_SREG_DATA:
+	case NFTA_DYNSET_SET_ID:
+	case NFTA_DYNSET_OP:
+	case NFTA_DYNSET_FLAGS:
+		if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
+			abi_breakage();
+		break;
+	case NFTA_DYNSET_TIMEOUT:
+		if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
+			abi_breakage();
+		break;
+	case NFTA_DYNSET_SET_NAME:
+		if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
+			abi_breakage();
+		break;
+	case NFTA_DYNSET_EXPR:
+		if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
+			abi_breakage();
+		break;
+	}
+
+	tb[type] = attr;
+	return MNL_CB_OK;
+}
+
+static void
+nftnl_expr_dynset_build(struct nlmsghdr *nlh, const struct nftnl_expr *e)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nlattr *nest;
+	int num_exprs = 0;
+
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_KEY))
+		mnl_attr_put_u32(nlh, NFTA_DYNSET_SREG_KEY, htonl(dynset->sreg_key));
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA))
+		mnl_attr_put_u32(nlh, NFTA_DYNSET_SREG_DATA, htonl(dynset->sreg_data));
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_OP))
+		mnl_attr_put_u32(nlh, NFTA_DYNSET_OP, htonl(dynset->op));
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_TIMEOUT))
+		mnl_attr_put_u64(nlh, NFTA_DYNSET_TIMEOUT, htobe64(dynset->timeout));
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_NAME))
+		mnl_attr_put_strz(nlh, NFTA_DYNSET_SET_NAME, dynset->set_name);
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_ID))
+		mnl_attr_put_u32(nlh, NFTA_DYNSET_SET_ID, htonl(dynset->set_id));
+	if (!list_empty(&dynset->expr_list)) {
+		struct nftnl_expr *expr;
+
+		list_for_each_entry(expr, &dynset->expr_list, head)
+			num_exprs++;
+
+		if (num_exprs == 1) {
+			nest = mnl_attr_nest_start(nlh, NFTA_DYNSET_EXPR);
+			list_for_each_entry(expr, &dynset->expr_list, head)
+				nftnl_expr_build_payload(nlh, expr);
+			mnl_attr_nest_end(nlh, nest);
+		} else if (num_exprs > 1) {
+			struct nlattr *nest1, *nest2;
+
+			nest1 = mnl_attr_nest_start(nlh, NFTA_DYNSET_EXPRESSIONS);
+			list_for_each_entry(expr, &dynset->expr_list, head) {
+				nest2 = mnl_attr_nest_start(nlh, NFTA_LIST_ELEM);
+				nftnl_expr_build_payload(nlh, expr);
+				mnl_attr_nest_end(nlh, nest2);
+			}
+			mnl_attr_nest_end(nlh, nest1);
+		}
+	}
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_FLAGS))
+		mnl_attr_put_u32(nlh, NFTA_DYNSET_FLAGS,
+				 htonl(dynset->dynset_flags));
+}
+
+EXPORT_SYMBOL(nftnl_expr_add_expr);
+void nftnl_expr_add_expr(struct nftnl_expr *e, uint32_t type,
+			 struct nftnl_expr *expr)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+
+	list_add_tail(&expr->head, &dynset->expr_list);
+}
+
+EXPORT_SYMBOL(nftnl_expr_expr_foreach);
+int nftnl_expr_expr_foreach(const struct nftnl_expr *e,
+			    int (*cb)(struct nftnl_expr *e, void *data),
+			    void *data)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nftnl_expr *cur, *tmp;
+	int ret;
+
+	list_for_each_entry_safe(cur, tmp, &dynset->expr_list, head) {
+		ret = cb(cur, data);
+		if (ret < 0)
+			return ret;
+	}
+	return 0;
+}
+
+static int
+nftnl_expr_dynset_parse(struct nftnl_expr *e, struct nlattr *attr)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nlattr *tb[NFTA_SET_MAX+1] = {};
+	struct nftnl_expr *expr, *next;
+	int ret = 0;
+
+	if (mnl_attr_parse_nested(attr, nftnl_expr_dynset_cb, tb) < 0)
+		return -1;
+
+	if (tb[NFTA_DYNSET_SREG_KEY]) {
+		dynset->sreg_key = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SREG_KEY]));
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_SREG_KEY);
+	}
+	if (tb[NFTA_DYNSET_SREG_DATA]) {
+		dynset->sreg_data = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SREG_DATA]));
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_SREG_DATA);
+	}
+	if (tb[NFTA_DYNSET_OP]) {
+		dynset->op = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_OP]));
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_OP);
+	}
+	if (tb[NFTA_DYNSET_TIMEOUT]) {
+		dynset->timeout = be64toh(mnl_attr_get_u64(tb[NFTA_DYNSET_TIMEOUT]));
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_TIMEOUT);
+	}
+	if (tb[NFTA_DYNSET_SET_NAME]) {
+		dynset->set_name =
+			strdup(mnl_attr_get_str(tb[NFTA_DYNSET_SET_NAME]));
+		if (!dynset->set_name)
+			return -1;
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_SET_NAME);
+	}
+	if (tb[NFTA_DYNSET_SET_ID]) {
+		dynset->set_id = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SET_ID]));
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_SET_ID);
+	}
+	if (tb[NFTA_DYNSET_EXPR]) {
+		expr = nftnl_expr_parse(tb[NFTA_DYNSET_EXPR]);
+		if (expr == NULL)
+			return -1;
+
+		list_add(&expr->head, &dynset->expr_list);
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_EXPR);
+	} else if (tb[NFTA_DYNSET_EXPRESSIONS]) {
+		struct nlattr *attr2;
+
+		mnl_attr_for_each_nested(attr2, tb[NFTA_DYNSET_EXPRESSIONS]) {
+			if (mnl_attr_get_type(attr2) != NFTA_LIST_ELEM)
+				goto out_dynset_expr;
+
+			expr = nftnl_expr_parse(attr2);
+			if (!expr)
+				goto out_dynset_expr;
+
+			list_add_tail(&expr->head, &dynset->expr_list);
+		}
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_EXPRESSIONS);
+	}
+	if (tb[NFTA_DYNSET_FLAGS]) {
+		dynset->dynset_flags = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_FLAGS]));
+		e->flags |= (1 << NFTNL_EXPR_DYNSET_FLAGS);
+	}
+
+	return ret;
+out_dynset_expr:
+	list_for_each_entry_safe(expr, next, &dynset->expr_list, head)
+		nftnl_expr_free(expr);
+
+	return -1;
+}
+
+static const char *op2str_array[] = {
+	[NFT_DYNSET_OP_ADD]		= "add",
+	[NFT_DYNSET_OP_UPDATE] 		= "update",
+	[NFT_DYNSET_OP_DELETE]		= "delete",
+};
+
+static const char *op2str(enum nft_dynset_ops op)
+{
+	if (op > NFT_DYNSET_OP_DELETE)
+		return "unknown";
+	return op2str_array[op];
+}
+
+static int
+nftnl_expr_dynset_snprintf(char *buf, size_t remain,
+			   uint32_t flags, const struct nftnl_expr *e)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nftnl_expr *expr;
+	int offset = 0, ret;
+
+	ret = snprintf(buf, remain, "%s reg_key %u set %s ",
+		       op2str(dynset->op), dynset->sreg_key, dynset->set_name);
+	SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA)) {
+		ret = snprintf(buf + offset, remain, "sreg_data %u ",
+			       dynset->sreg_data);
+		SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+	}
+	if (e->flags & (1 << NFTNL_EXPR_DYNSET_TIMEOUT)) {
+		ret = snprintf(buf + offset, remain, "timeout %"PRIu64"ms ",
+			       dynset->timeout);
+		SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+	}
+	list_for_each_entry(expr, &dynset->expr_list, head) {
+		ret = snprintf(buf + offset, remain, "expr [ %s ",
+			       expr->ops->name);
+		SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+
+		ret = nftnl_expr_snprintf(buf + offset, remain, expr,
+					     NFTNL_OUTPUT_DEFAULT,
+					     NFTNL_OF_EVENT_ANY);
+		SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+
+		ret = snprintf(buf + offset, remain, "] ");
+		SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+	}
+
+	return offset;
+}
+
+static void nftnl_expr_dynset_init(const struct nftnl_expr *e)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+
+	INIT_LIST_HEAD(&dynset->expr_list);
+}
+
+static void nftnl_expr_dynset_free(const struct nftnl_expr *e)
+{
+	struct nftnl_expr_dynset *dynset = nftnl_expr_data(e);
+	struct nftnl_expr *expr, *next;
+
+	xfree(dynset->set_name);
+	list_for_each_entry_safe(expr, next, &dynset->expr_list, head)
+		nftnl_expr_free(expr);
+}
+
+struct expr_ops expr_ops_dynset = {
+	.name		= "dynset",
+	.alloc_len	= sizeof(struct nftnl_expr_dynset),
+	.max_attr	= NFTA_DYNSET_MAX,
+	.init		= nftnl_expr_dynset_init,
+	.free		= nftnl_expr_dynset_free,
+	.set		= nftnl_expr_dynset_set,
+	.get		= nftnl_expr_dynset_get,
+	.parse		= nftnl_expr_dynset_parse,
+	.build		= nftnl_expr_dynset_build,
+	.output		= nftnl_expr_dynset_snprintf,
+};