diff options
author | Fernando Fernandez Mancera <ffmancera@riseup.net> | 2018-08-03 23:47:11 +0200 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-08-04 00:21:19 +0200 |
commit | 9f28b685b473b2424524d0443ef1e0ed8ba276de (patch) | |
tree | 14834b9e589da013b8b058b49beaf8a2b8ceae72 /src/netlink_linearize.c | |
parent | cdb5655ee44da4113d1ee72fbd6afa6ca4ffaa14 (diff) |
src: introduce passive OS fingerprint matching
Add support for "osf" expression. Example:
table ip foo {
chain bar {
type filter hook input priority 0; policy accept;
osf name "Linux" counter packets 3 bytes 132
}
}
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/netlink_linearize.c')
-rw-r--r-- | src/netlink_linearize.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/netlink_linearize.c b/src/netlink_linearize.c index aa00564a..442c5a94 100644 --- a/src/netlink_linearize.c +++ b/src/netlink_linearize.c @@ -219,6 +219,17 @@ static void netlink_gen_socket(struct netlink_linearize_ctx *ctx, nftnl_rule_add_expr(ctx->nlr, nle); } +static void netlink_gen_osf(struct netlink_linearize_ctx *ctx, + const struct expr *expr, + enum nft_registers dreg) +{ + struct nftnl_expr *nle; + + nle = alloc_nft_expr("osf"); + netlink_put_register(nle, NFTNL_EXPR_OSF_DREG, dreg); + nftnl_rule_add_expr(ctx->nlr, nle); +} + static void netlink_gen_numgen(struct netlink_linearize_ctx *ctx, const struct expr *expr, enum nft_registers dreg) @@ -708,6 +719,8 @@ static void netlink_gen_expr(struct netlink_linearize_ctx *ctx, return netlink_gen_fib(ctx, expr, dreg); case EXPR_SOCKET: return netlink_gen_socket(ctx, expr, dreg); + case EXPR_OSF: + return netlink_gen_osf(ctx, expr, dreg); default: BUG("unknown expression type %s\n", expr->ops->name); } |