right now exthdr only deals with ipv6 extension headers, followup
patch will enable tcp option matching.
This adds the 'op' arg to exthdr_init.
Signed-off-by: Manuel Messner <m...@skelett.io>
Reviewed-by: Florian Westphal <f...@strlen.de>
---
include/exthdr.h | 3 ++-
src/exthdr.c | 5 +++--
src/netlink_delinearize.c | 4 +++-
src/netlink_linearize.c | 4 ++--
4 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/include/exthdr.h b/include/exthdr.h
index d17841b..93a53f3 100644
--- a/include/exthdr.h
+++ b/include/exthdr.h
@@ -21,7 +21,8 @@ extern struct expr *exthdr_expr_alloc(const struct location
*loc,
uint8_t type);
extern void exthdr_init_raw(struct expr *expr, uint8_t type,
- unsigned int offset, unsigned int len);
+ unsigned int offset, unsigned int len,
+ enum nft_exthdr_op op);
extern bool exthdr_find_template(struct expr *expr, const struct expr *mask,
unsigned int *shift);
diff --git a/src/exthdr.c b/src/exthdr.c
index c641d4a..45b1b69 100644
--- a/src/exthdr.c
+++ b/src/exthdr.c
@@ -79,7 +79,8 @@ static const struct exthdr_desc
*exthdr_protocols[IPPROTO_MAX] = {
};
void exthdr_init_raw(struct expr *expr, uint8_t type,
- unsigned int offset, unsigned int len)
+ unsigned int offset, unsigned int len,
+ enum nft_exthdr_op op)
{
const struct proto_hdr_template *tmpl;
unsigned int i;
@@ -123,7 +124,7 @@ bool exthdr_find_template(struct expr *expr, const struct
expr *mask, unsigned i
off += round_up(mask->len, BITS_PER_BYTE) - mask_len;
exthdr_init_raw(expr, expr->exthdr.desc->type,
- off, mask_len - mask_offset);
+ off, mask_len - mask_offset, NFT_EXTHDR_OP_IPV6);
/* still failed to find a template... Bug. */
if (expr->exthdr.tmpl == &exthdr_unknown_template)
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c
index 144edf5..d6a9fe1 100644
--- a/src/netlink_delinearize.c
+++ b/src/netlink_delinearize.c
@@ -499,6 +499,7 @@ static void netlink_parse_exthdr(struct netlink_parse_ctx
*ctx,
const struct nftnl_expr *nle)
{
enum nft_registers dreg;
+ enum nft_exthdr_op op;
uint32_t offset, len;
uint8_t type;
struct expr *expr;
@@ -506,9 +507,10 @@ static void netlink_parse_exthdr(struct netlink_parse_ctx
*ctx,
type = nftnl_expr_get_u8(nle, NFTNL_EXPR_EXTHDR_TYPE);
offset = nftnl_expr_get_u32(nle, NFTNL_EXPR_EXTHDR_OFFSET) *
BITS_PER_BYTE;
len = nftnl_expr_get_u32(nle, NFTNL_EXPR_EXTHDR_LEN) * BITS_PER_BYTE;
+ op = NFT_EXTHDR_OP_IPV6;
expr = exthdr_expr_alloc(loc, NULL, 0);
- exthdr_init_raw(expr, type, offset, len);
+ exthdr_init_raw(expr, type, offset, len, op);
dreg = netlink_parse_register(nle, NFTNL_EXPR_EXTHDR_DREG);
netlink_set_register(ctx, dreg, expr);
diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c
index 5030135..056f113 100644
--- a/src/netlink_linearize.c
+++ b/src/netlink_linearize.c
@@ -162,14 +162,14 @@ static void netlink_gen_exthdr(struct
netlink_linearize_ctx *ctx,
const struct expr *expr,
enum nft_registers dreg)
{
+ unsigned int offset = expr->exthdr.tmpl->offset;
struct nftnl_expr *nle;
nle = alloc_nft_expr("exthdr");
netlink_put_register(nle, NFTNL_EXPR_EXTHDR_DREG, dreg);
nftnl_expr_set_u8(nle, NFTNL_EXPR_EXTHDR_TYPE,
expr->exthdr.desc->type);
- nftnl_expr_set_u32(nle, NFTNL_EXPR_EXTHDR_OFFSET,
- expr->exthdr.tmpl->offset / BITS_PER_BYTE);
+ nftnl_expr_set_u32(nle, NFTNL_EXPR_EXTHDR_OFFSET, offset /
BITS_PER_BYTE);
nftnl_expr_set_u32(nle, NFTNL_EXPR_EXTHDR_LEN,
div_round_up(expr->len, BITS_PER_BYTE));
nftnl_rule_add_expr(ctx->nlr, nle);
--
2.11.1
--
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