Arturo Borrero added kernel support to set meta keys in http://patchwork.ozlabs.org/patch/305281/ and the corresponding library support in http://patchwork.ozlabs.org/patch/305283/. This patch enhances nft to use this new kernel feature. The following example shows how to set the packet mark. % nft add rule ip filter input meta mark set 22 % nft list table filter table ip filter { chain input { type filter hook input priority 0; meta mark set 0x00000016 } } Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> --- src/netlink_delinearize.c | 37 ++++++++++++++++++++++++++++++++++--- src/netlink_linearize.c | 2 ++ 2 files changed, 36 insertions(+), 3 deletions(-) diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c index 7e4e38c..d1d35f8 100644 --- a/src/netlink_delinearize.c +++ b/src/netlink_delinearize.c @@ -325,9 +325,9 @@ static void netlink_parse_exthdr(struct netlink_parse_ctx *ctx, expr); } -static void netlink_parse_meta(struct netlink_parse_ctx *ctx, - const struct location *loc, - const struct nft_rule_expr *nle) +static void netlink_parse_meta_dreg(struct netlink_parse_ctx *ctx, + const struct location *loc, + const struct nft_rule_expr *nle) { struct expr *expr; @@ -338,6 +338,33 @@ static void netlink_parse_meta(struct netlink_parse_ctx *ctx, expr); } +static void netlink_parse_meta_sreg(struct netlink_parse_ctx *ctx, + const struct location *loc, + const struct nft_rule_expr *nle) +{ + struct stmt *stmt; + struct expr *expr; + + expr = netlink_get_register(ctx, loc, + nft_rule_expr_get_u8(nle, NFT_EXPR_META_SREG)); + stmt = meta_stmt_alloc(loc, + nft_rule_expr_get_u8(nle, NFT_EXPR_META_KEY), + expr); + expr_set_type(expr, stmt->meta.tmpl->dtype, stmt->meta.tmpl->byteorder); + + list_add_tail(&stmt->list, &ctx->rule->stmts); +} + +static void netlink_parse_meta(struct netlink_parse_ctx *ctx, + const struct location *loc, + const struct nft_rule_expr *nle) +{ + if (nft_rule_expr_is_set(nle, NFT_EXPR_META_DREG)) + netlink_parse_meta_dreg(ctx, loc, nle); + else + netlink_parse_meta_sreg(ctx, loc, nle); +} + static void netlink_parse_ct(struct netlink_parse_ctx *ctx, const struct location *loc, const struct nft_rule_expr *nle) @@ -786,6 +813,10 @@ static void rule_parse_postprocess(struct netlink_parse_ctx *ctx, struct rule *r case STMT_EXPRESSION: expr_postprocess(&rctx, stmt, &stmt->expr); break; + case STMT_META: + if (stmt->meta.expr != NULL) + expr_postprocess(&rctx, stmt, &stmt->meta.expr); + break; case STMT_NAT: if (stmt->nat.addr != NULL) expr_postprocess(&rctx, stmt, &stmt->nat.addr); diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c index e64e92a..0ac0218 100644 --- a/src/netlink_linearize.c +++ b/src/netlink_linearize.c @@ -518,6 +518,8 @@ static void netlink_gen_meta_stmt(struct netlink_linearize_ctx *ctx, release_register(ctx); nle = alloc_nft_expr("meta"); + nft_rule_expr_set_u32(nle, NFT_EXPR_META_SREG, sreg); + nft_rule_expr_set_u32(nle, NFT_EXPR_META_KEY, stmt->meta.key); nft_rule_add_expr(ctx->nlr, nle); } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html