Adding upstream version 1.2.6.upstream/1.2.6upstream

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

1 files changed, 202 insertions, 0 deletions

diff --git a/src/expr/fib.c b/src/expr/fib.c
new file mode 100644
index 0000000..957f929
--- /dev/null
+++ b/src/expr/fib.c
@@ -0,0 +1,202 @@
+/*
+ * (C) 2016 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 <inttypes.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <errno.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include "internal.h"
+#include <libmnl/libmnl.h>
+#include <libnftnl/expr.h>
+#include <libnftnl/rule.h>
+
+struct nftnl_expr_fib {
+	uint32_t		flags;
+	uint32_t		result;
+	enum nft_registers	dreg;
+};
+
+static int
+nftnl_expr_fib_set(struct nftnl_expr *e, uint16_t result,
+		    const void *data, uint32_t data_len)
+{
+	struct nftnl_expr_fib *fib = nftnl_expr_data(e);
+
+	switch (result) {
+	case NFTNL_EXPR_FIB_RESULT:
+		memcpy(&fib->result, data, sizeof(fib->result));
+		break;
+	case NFTNL_EXPR_FIB_DREG:
+		memcpy(&fib->dreg, data, sizeof(fib->dreg));
+		break;
+	case NFTNL_EXPR_FIB_FLAGS:
+		memcpy(&fib->flags, data, sizeof(fib->flags));
+		break;
+	default:
+		return -1;
+	}
+	return 0;
+}
+
+static const void *
+nftnl_expr_fib_get(const struct nftnl_expr *e, uint16_t result,
+		    uint32_t *data_len)
+{
+	struct nftnl_expr_fib *fib = nftnl_expr_data(e);
+
+	switch (result) {
+	case NFTNL_EXPR_FIB_RESULT:
+		*data_len = sizeof(fib->result);
+		return &fib->result;
+	case NFTNL_EXPR_FIB_DREG:
+		*data_len = sizeof(fib->dreg);
+		return &fib->dreg;
+	case NFTNL_EXPR_FIB_FLAGS:
+		*data_len = sizeof(fib->flags);
+		return &fib->flags;
+	}
+	return NULL;
+}
+
+static int nftnl_expr_fib_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_FIB_MAX) < 0)
+		return MNL_CB_OK;
+
+	switch (type) {
+	case NFTA_FIB_RESULT:
+	case NFTA_FIB_DREG:
+	case NFTA_FIB_FLAGS:
+		if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
+			abi_breakage();
+		break;
+	}
+
+	tb[type] = attr;
+	return MNL_CB_OK;
+}
+
+static void
+nftnl_expr_fib_build(struct nlmsghdr *nlh, const struct nftnl_expr *e)
+{
+	struct nftnl_expr_fib *fib = nftnl_expr_data(e);
+
+	if (e->flags & (1 << NFTNL_EXPR_FIB_FLAGS))
+		mnl_attr_put_u32(nlh, NFTA_FIB_FLAGS, htonl(fib->flags));
+	if (e->flags & (1 << NFTNL_EXPR_FIB_RESULT))
+		mnl_attr_put_u32(nlh, NFTA_FIB_RESULT, htonl(fib->result));
+	if (e->flags & (1 << NFTNL_EXPR_FIB_DREG))
+		mnl_attr_put_u32(nlh, NFTA_FIB_DREG, htonl(fib->dreg));
+}
+
+static int
+nftnl_expr_fib_parse(struct nftnl_expr *e, struct nlattr *attr)
+{
+	struct nftnl_expr_fib *fib = nftnl_expr_data(e);
+	struct nlattr *tb[NFTA_FIB_MAX+1] = {};
+	int ret = 0;
+
+	if (mnl_attr_parse_nested(attr, nftnl_expr_fib_cb, tb) < 0)
+		return -1;
+
+	if (tb[NFTA_FIB_RESULT]) {
+		fib->result = ntohl(mnl_attr_get_u32(tb[NFTA_FIB_RESULT]));
+		e->flags |= (1 << NFTNL_EXPR_FIB_RESULT);
+	}
+	if (tb[NFTA_FIB_DREG]) {
+		fib->dreg = ntohl(mnl_attr_get_u32(tb[NFTA_FIB_DREG]));
+		e->flags |= (1 << NFTNL_EXPR_FIB_DREG);
+	}
+	if (tb[NFTA_FIB_FLAGS]) {
+		fib->flags = ntohl(mnl_attr_get_u32(tb[NFTA_FIB_FLAGS]));
+		e->flags |= (1 << NFTNL_EXPR_FIB_FLAGS);
+	}
+	return ret;
+}
+
+static const char *fib_type[NFT_FIB_RESULT_MAX + 1] = {
+	[NFT_FIB_RESULT_OIF] = "oif",
+	[NFT_FIB_RESULT_OIFNAME] = "oifname",
+	[NFT_FIB_RESULT_ADDRTYPE] = "type",
+};
+
+static const char *fib_type_str(enum nft_fib_result r)
+{
+	if (r <= NFT_FIB_RESULT_MAX)
+		return fib_type[r];
+
+	return "unknown";
+}
+
+static int
+nftnl_expr_fib_snprintf(char *buf, size_t remain,
+			 uint32_t printflags, const struct nftnl_expr *e)
+{
+	struct nftnl_expr_fib *fib = nftnl_expr_data(e);
+	uint32_t flags = fib->flags & ~NFTA_FIB_F_PRESENT;
+	uint32_t present_flag = fib->flags & NFTA_FIB_F_PRESENT;
+	int offset = 0, ret, i;
+	static const struct {
+		int bit;
+		const char *name;
+	} tab[] = {
+		{ NFTA_FIB_F_SADDR, "saddr" },
+		{ NFTA_FIB_F_DADDR, "daddr" },
+		{ NFTA_FIB_F_MARK, "mark" },
+		{ NFTA_FIB_F_IIF, "iif" },
+		{ NFTA_FIB_F_OIF, "oif" },
+	};
+
+	for (i = 0; i < (sizeof(tab) / sizeof(tab[0])); i++) {
+		if (flags & tab[i].bit) {
+			ret = snprintf(buf + offset, remain, "%s ",
+				       tab[i].name);
+			SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+
+			flags &= ~tab[i].bit;
+			if (flags) {
+				ret = snprintf(buf + offset, remain, ". ");
+				SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+			}
+		}
+	}
+
+	if (flags) {
+		ret = snprintf(buf + offset, remain, "unknown 0x%" PRIx32,
+			       flags);
+		SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+	}
+
+	ret = snprintf(buf + offset, remain, "%s%s => reg %d ",
+		       fib_type_str(fib->result),
+		       present_flag ? " present" : "",
+		       fib->dreg);
+	SNPRINTF_BUFFER_SIZE(ret, remain, offset);
+
+	return offset;
+}
+
+struct expr_ops expr_ops_fib = {
+	.name		= "fib",
+	.alloc_len	= sizeof(struct nftnl_expr_fib),
+	.max_attr	= NFTA_FIB_MAX,
+	.set		= nftnl_expr_fib_set,
+	.get		= nftnl_expr_fib_get,
+	.parse		= nftnl_expr_fib_parse,
+	.build		= nftnl_expr_fib_build,
+	.output		= nftnl_expr_fib_snprintf,
+};