From 57c2b152c5f0866be5bf1acda2f341ba26ba9448 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?M=C3=A1t=C3=A9=20Eckl?= Date: Wed, 5 Sep 2018 11:16:44 +0200 Subject: src: add ipsec (xfrm) expression MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This allows matching on ipsec tunnel/beet addresses in xfrm state associated with a packet, ipsec request id and the SPI. Examples: ipsec in ip saddr 192.168.1.0/24 ipsec out ip6 daddr @endpoints ipsec in spi 1-65536 Joint work with Florian Westphal. Cc: Máté Eckl Signed-off-by: Florian Westphal --- src/evaluate.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'src/evaluate.c') diff --git a/src/evaluate.c b/src/evaluate.c index c8010852..ff36f576 100644 --- a/src/evaluate.c +++ b/src/evaluate.c @@ -1751,6 +1751,23 @@ static int expr_evaluate_variable(struct eval_ctx *ctx, struct expr **exprp) return expr_evaluate(ctx, exprp); } +static int expr_evaluate_xfrm(struct eval_ctx *ctx, struct expr **exprp) +{ + struct expr *expr = *exprp; + + switch (ctx->pctx.family) { + case NFPROTO_IPV4: + case NFPROTO_IPV6: + case NFPROTO_INET: + break; + default: + return expr_error(ctx->msgs, expr, "ipsec expression is only" + " valid in ip/ip6/inet tables"); + } + + return expr_evaluate_primary(ctx, exprp); +} + static int expr_evaluate(struct eval_ctx *ctx, struct expr **expr) { if (ctx->debug_mask & NFT_DEBUG_EVALUATION) { @@ -1816,6 +1833,8 @@ static int expr_evaluate(struct eval_ctx *ctx, struct expr **expr) return expr_evaluate_numgen(ctx, expr); case EXPR_HASH: return expr_evaluate_hash(ctx, expr); + case EXPR_XFRM: + return expr_evaluate_xfrm(ctx, expr); default: BUG("unknown expression type %s\n", (*expr)->ops->name); } -- cgit v1.2.3