{"id":2225261,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2225261/?format=json","web_url":"http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260420170644.22075-1-fmancera@suse.de/","project":{"id":26,"url":"http://patchwork.ozlabs.org/api/1.1/projects/26/?format=json","name":"Netfilter Development","link_name":"netfilter-devel","list_id":"netfilter-devel.vger.kernel.org","list_email":"netfilter-devel@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260420170644.22075-1-fmancera@suse.de>","date":"2026-04-20T17:06:44","name":"[libnftnl,v3] expr: add support to math expression","commit_ref":null,"pull_url":null,"state":"changes-requested","archived":false,"hash":"249504288c8a790b91f730531a32f02b5584f89f","submitter":{"id":90904,"url":"http://patchwork.ozlabs.org/api/1.1/people/90904/?format=json","name":"Fernando Fernandez Mancera","email":"fmancera@suse.de"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/netfilter-devel/patch/20260420170644.22075-1-fmancera@suse.de/mbox/","series":[{"id":500660,"url":"http://patchwork.ozlabs.org/api/1.1/series/500660/?format=json","web_url":"http://patchwork.ozlabs.org/project/netfilter-devel/list/?series=500660","date":"2026-04-20T17:06:44","name":"[libnftnl,v3] expr: add support to math expression","version":3,"mbox":"http://patchwork.ozlabs.org/series/500660/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2225261/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2225261/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","netfilter-devel@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=j/myUb1y;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=uYwGjUi4;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=j/myUb1y;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=uYwGjUi4;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; helo=sea.lore.kernel.org;\n envelope-from=netfilter-devel+bounces-12072-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"j/myUb1y\";\n\tdkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"uYwGjUi4\";\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"j/myUb1y\";\n\tdkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=\"uYwGjUi4\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=195.135.223.130","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=suse.de","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=suse.de","smtp-out1.suse.de;\n\tnone"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org [172.234.253.10])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fzvDt5576z1yCv\n\tfor ; Tue, 21 Apr 2026 04:30:38 +1000 (AEST)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id 43C533121003\n\tfor ; Mon, 20 Apr 2026 17:07:00 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 7E6F737E2E4;\n\tMon, 20 Apr 2026 17:06:59 +0000 (UTC)","from smtp-out1.suse.de (smtp-out1.suse.de [195.135.223.130])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 950F6378830\n\tfor ; Mon, 20 Apr 2026 17:06:57 +0000 (UTC)","from imap1.dmz-prg2.suse.org (unknown [10.150.64.97])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest\n SHA256)\n\t(No client certificate requested)\n\tby smtp-out1.suse.de (Postfix) with ESMTPS id CE9196A7DC;\n\tMon, 20 Apr 2026 17:06:55 +0000 (UTC)","from imap1.dmz-prg2.suse.org (localhost [127.0.0.1])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest\n SHA256)\n\t(No client certificate requested)\n\tby imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 7086F593AE;\n\tMon, 20 Apr 2026 17:06:55 +0000 (UTC)","from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167])\n\tby imap1.dmz-prg2.suse.org with ESMTPSA\n\tid PJjEGC9d5mk+BAAAD6G6ig\n\t(envelope-from ); Mon, 20 Apr 2026 17:06:55 +0000"],"ARC-Seal":"i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776704819; cv=none;\n b=mufw9zz+jB6ppz2sD5Y/qTOgOrC2PxQSDALRe1VslznKxqkZRtW6gqnxgVO7DI4EZr600pX2cLhjJJlZjO+fS2GRlUm0fNNrzfQuGeXWTTo879AA6lE1t2lRmIHb+9MQreORPP3rDH0tocMqdSjNsNac+2qXE/Udjgz7rQqovIU=","ARC-Message-Signature":"i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776704819; c=relaxed/simple;\n\tbh=KRoucZdtKhn8bxecQT1BI9h/5fx6zJ45TmRNjfcnnzk=;\n\th=From:To:Cc:Subject:Date:Message-ID:MIME-Version;\n b=q5wAm5iqF51VXLC68SCvXDLMkYa4DZGAwtF/PABGohpI6/oICIN2x+Pa3cIWJg+GAwJpV6DK3BawG/7qi/ytbmcOgpWmNGDMBaKl46FvsgZEOogRdhVH4c4OeFdFxcSFLmo86HtAEtBb/zD6m4510ASiDomvLqyZ3imLn3UuRrE=","ARC-Authentication-Results":"i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=suse.de;\n spf=pass smtp.mailfrom=suse.de;\n dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=j/myUb1y;\n dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=uYwGjUi4;\n dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.b=j/myUb1y;\n dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de\n header.b=uYwGjUi4; arc=none smtp.client-ip=195.135.223.130","DKIM-Signature":["v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n\tt=1776704815;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=BQiBgztjhi0+v/VAEFKigtPnlQ1fJW8I0AYtJ4PxcJ0=;\n\tb=j/myUb1yPSYxDp4+OQnKVxR3MBYV6bTW2LdgUsdQgmYaoOdYrFU2hlA4ZADBHNpDMoIstz\n\tVkciX1sb7QGHlHxUFSiVhZtq+PXPhBZkPACfDuahcYbo63JMawH8fymnw5prso177zn0Al\n\tri1QEdprxWQWc3/Wd/6PIrXnUdqCUqA=","v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n\ts=susede2_ed25519; t=1776704815;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=BQiBgztjhi0+v/VAEFKigtPnlQ1fJW8I0AYtJ4PxcJ0=;\n\tb=uYwGjUi43TsyU4856p84fD81os6J5lm+qkLgDQSp8f4pks9Q8blLDyiHyjiEMOOtDCVjDO\n\tNSYa3iOsc8mJYwCQ==","v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n\tt=1776704815;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=BQiBgztjhi0+v/VAEFKigtPnlQ1fJW8I0AYtJ4PxcJ0=;\n\tb=j/myUb1yPSYxDp4+OQnKVxR3MBYV6bTW2LdgUsdQgmYaoOdYrFU2hlA4ZADBHNpDMoIstz\n\tVkciX1sb7QGHlHxUFSiVhZtq+PXPhBZkPACfDuahcYbo63JMawH8fymnw5prso177zn0Al\n\tri1QEdprxWQWc3/Wd/6PIrXnUdqCUqA=","v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n\ts=susede2_ed25519; t=1776704815;\n\th=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n\t mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding;\n\tbh=BQiBgztjhi0+v/VAEFKigtPnlQ1fJW8I0AYtJ4PxcJ0=;\n\tb=uYwGjUi43TsyU4856p84fD81os6J5lm+qkLgDQSp8f4pks9Q8blLDyiHyjiEMOOtDCVjDO\n\tNSYa3iOsc8mJYwCQ=="],"From":"Fernando Fernandez Mancera ","To":"netfilter-devel@vger.kernel.org","Cc":"coreteam@netfilter.org,\n\tphil@nwl.cc,\n\tfw@strlen.de,\n\tpablo@netfilter.org,\n\tFernando Fernandez Mancera ","Subject":"[PATCH libnftnl v3] expr: add support to math expression","Date":"Mon, 20 Apr 2026 19:06:44 +0200","Message-ID":"<20260420170644.22075-1-fmancera@suse.de>","X-Mailer":"git-send-email 2.51.0","Precedence":"bulk","X-Mailing-List":"netfilter-devel@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-Spamd-Result":"default: False [-2.80 / 50.00];\n\tBAYES_HAM(-3.00)[100.00%];\n\tMID_CONTAINS_FROM(1.00)[];\n\tNEURAL_HAM_LONG(-1.00)[-1.000];\n\tR_MISSING_CHARSET(0.50)[];\n\tNEURAL_HAM_SHORT(-0.20)[-1.000];\n\tMIME_GOOD(-0.10)[text/plain];\n\tARC_NA(0.00)[];\n\tMIME_TRACE(0.00)[0:+];\n\tRCVD_COUNT_TWO(0.00)[2];\n\tTO_DN_SOME(0.00)[];\n\tFUZZY_RATELIMITED(0.00)[rspamd.com];\n\tDKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n\tTO_MATCH_ENVRCPT_ALL(0.00)[];\n\tFROM_HAS_DN(0.00)[];\n\tRCVD_VIA_SMTP_AUTH(0.00)[];\n\tFROM_EQ_ENVFROM(0.00)[];\n\tRCVD_TLS_ALL(0.00)[];\n\tRCPT_COUNT_FIVE(0.00)[6];\n\tDBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email]","X-Spam-Flag":"NO","X-Spam-Score":"-2.80","X-Spam-Level":""},"content":"Signed-off-by: Fernando Fernandez Mancera \n---\nv2: adjusted the new fields and fixed the duplicated \"math\" on print\nv3: removed NFTNL_EXPR_MATH_LEN and simplified printing\n---\n include/libnftnl/expr.h | 8 ++\n include/linux/netfilter/nf_tables.h | 25 ++++\n src/Makefile.am | 1 +\n src/expr/math.c | 178 ++++++++++++++++++++++++++++\n src/expr_ops.c | 2 +\n 5 files changed, 214 insertions(+)\n create mode 100644 src/expr/math.c","diff":"diff --git a/include/libnftnl/expr.h b/include/libnftnl/expr.h\nindex 41e9f30..e21752f 100644\n--- a/include/libnftnl/expr.h\n+++ b/include/libnftnl/expr.h\n@@ -364,6 +364,14 @@ enum {\n \t__NFTNL_EXPR_INNER_MAX\n };\n \n+enum {\n+\tNFTNL_EXPR_MATH_SREG\t= NFTNL_EXPR_BASE,\n+\tNFTNL_EXPR_MATH_DREG,\n+\tNFTNL_EXPR_MATH_OP,\n+\tNFTNL_EXPR_MATH_BITMASK,\n+\t__NFTNL_EXPR_MATH_MAX\n+};\n+\n #ifdef __cplusplus\n } /* extern \"C\" */\n #endif\ndiff --git a/include/linux/netfilter/nf_tables.h b/include/linux/netfilter/nf_tables.h\nindex 7c0c915..ee8df9a 100644\n--- a/include/linux/netfilter/nf_tables.h\n+++ b/include/linux/netfilter/nf_tables.h\n@@ -2015,4 +2015,29 @@ enum nft_tunnel_attributes {\n };\n #define NFTA_TUNNEL_MAX\t(__NFTA_TUNNEL_MAX - 1)\n \n+/**\n+ * enum nft_math_attributes - nftables math expression netlink attributes\n+ *\n+ * @NFTA_MATH_SREG: source register (NLA_U32: nft_registers)\n+ * @NFTA_MATH_DREG: destination register (NLA_U32: nft_registers)\n+ * @NFTA_MATH_OP: operation to be performed (NLA_U32)\n+ * @NFTA_MATH_BITMASK: bitmask to be applied on the operation (NLA_U32)\n+ */\n+enum nft_math_attributes {\n+\tNFTA_MATH_UNSPEC,\n+\tNFTA_MATH_SREG,\n+\tNFTA_MATH_DREG,\n+\tNFTA_MATH_OP,\n+\tNFTA_MATH_BITMASK,\n+\t__NFTA_MATH_MAX,\n+};\n+#define NFTA_MATH_MAX (__NFTA_MATH_MAX - 1)\n+\n+enum nft_math_op {\n+\tNFT_MATH_OP_INC,\n+\tNFT_MATH_OP_DEC,\n+\t__NFT_MATH_OP_MAX,\n+};\n+#define NFT_MATH_OP_MAX (__NFT_MATH_OP_MAX - 1)\n+\n #endif /* _LINUX_NF_TABLES_H */\ndiff --git a/src/Makefile.am b/src/Makefile.am\nindex 1c38d00..90eafc4 100644\n--- a/src/Makefile.am\n+++ b/src/Makefile.am\n@@ -62,6 +62,7 @@ libnftnl_la_SOURCES = utils.c\t\t\\\n \t\t expr/synproxy.c\t\\\n \t\t expr/osf.c\t\\\n \t\t expr/xfrm.c\t\\\n+\t\t expr/math.c\t\\\n \t\t obj/counter.c\t\\\n \t\t obj/ct_helper.c\t\\\n \t\t obj/quota.c\t\\\ndiff --git a/src/expr/math.c b/src/expr/math.c\nnew file mode 100644\nindex 0000000..f1997e4\n--- /dev/null\n+++ b/src/expr/math.c\n@@ -0,0 +1,178 @@\n+/* SPDX-License-Identifier: GPL-2.0-or-later */\n+/*\n+ * (C) 2025 by Fernando Fernandez Mancera \n+ */\n+\n+#include \n+#include \n+\n+#include \"internal.h\"\n+#include \n+#include \n+#include \n+\n+struct nftnl_expr_math {\n+\tenum nft_registers sreg;\n+\tenum nft_registers dreg;\n+\tenum nft_math_op op;\n+\tuint32_t\t bitmask;\n+};\n+\n+static int nftnl_expr_math_set(struct nftnl_expr *e, uint16_t type,\n+\t\t\t const void *data, uint32_t data_len,\n+\t\t\t uint32_t byteorder)\n+{\n+\tstruct nftnl_expr_math *math = nftnl_expr_data(e);\n+\n+\tswitch(type) {\n+\tcase NFTNL_EXPR_MATH_SREG:\n+\t\tmemcpy(&math->sreg, data, data_len);\n+\t\tbreak;\n+\tcase NFTNL_EXPR_MATH_DREG:\n+\t\tmemcpy(&math->dreg, data, data_len);\n+\t\tbreak;\n+\tcase NFTNL_EXPR_MATH_OP:\n+\t\tmemcpy(&math->op, data, data_len);\n+\t\tbreak;\n+\tcase NFTNL_EXPR_MATH_BITMASK:\n+\t\tmemcpy(&math->bitmask, data, data_len);\n+\t\tbreak;\n+\t}\n+\treturn 0;\n+}\n+\n+static const void *\n+nftnl_expr_math_get(const struct nftnl_expr *e, uint16_t type,\n+\t\t uint32_t *data_len)\n+{\n+\tstruct nftnl_expr_math *math = nftnl_expr_data(e);\n+\n+\tswitch(type) {\n+\tcase NFTNL_EXPR_MATH_SREG:\n+\t\t*data_len = sizeof(math->sreg);\n+\t\treturn &math->sreg;\n+\tcase NFTNL_EXPR_MATH_DREG:\n+\t\t*data_len = sizeof(math->dreg);\n+\t\treturn &math->dreg;\n+\tcase NFTNL_EXPR_MATH_OP:\n+\t\t*data_len = sizeof(math->op);\n+\t\treturn &math->op;\n+\tcase NFTNL_EXPR_MATH_BITMASK:\n+\t\t*data_len = sizeof(math->bitmask);\n+\t\treturn &math->bitmask;\n+\t}\n+\treturn NULL;\n+}\n+\n+static void\n+nftnl_expr_math_build(struct nlmsghdr *nlh, const struct nftnl_expr *e)\n+{\n+\tstruct nftnl_expr_math *math = nftnl_expr_data(e);\n+\n+\tif ((e->flags & (1 << NFTNL_EXPR_MATH_SREG)) &&\n+\t (e->flags & (1 << NFTNL_EXPR_MATH_DREG)) &&\n+\t (e->flags & (1 << NFTNL_EXPR_MATH_BITMASK)) &&\n+\t (e->flags & (1 << NFTNL_EXPR_MATH_OP))) {\n+\t\tmnl_attr_put_u32(nlh, NFTA_MATH_BITMASK, htonl(math->bitmask));\n+\t\tmnl_attr_put_u32(nlh, NFTA_MATH_SREG, htonl(math->sreg));\n+\t\tmnl_attr_put_u32(nlh, NFTA_MATH_DREG, htonl(math->dreg));\n+\t\tmnl_attr_put_u32(nlh, NFTA_MATH_OP, htonl(math->op));\n+\t}\n+\n+}\n+\n+static int nftnl_expr_math_cb(const struct nlattr *attr, void *data)\n+{\n+\tconst struct nlattr **tb = data;\n+\tint type = mnl_attr_get_type(attr);\n+\n+\tif (mnl_attr_type_valid(attr, NFTA_MATH_MAX) < 0)\n+\t\treturn MNL_CB_OK;\n+\n+\tswitch(type) {\n+\tcase NFTNL_EXPR_MATH_SREG:\n+\tcase NFTNL_EXPR_MATH_DREG:\n+\tcase NFTNL_EXPR_MATH_BITMASK:\n+\tcase NFTNL_EXPR_MATH_OP:\n+\t\tif (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)\n+\t\t\tabi_breakage();\n+\t\tbreak;\n+\t}\n+\n+\ttb[type] = attr;\n+\treturn MNL_CB_OK;\n+}\n+\n+static int\n+nftnl_expr_math_parse(struct nftnl_expr *e, struct nlattr *attr)\n+{\n+\tstruct nftnl_expr_math *math = nftnl_expr_data(e);\n+\tstruct nlattr *tb[NFTA_MATH_MAX + 1] = {};\n+\n+\tif (mnl_attr_parse_nested(attr, nftnl_expr_math_cb, tb) < 0)\n+\t\treturn -1;\n+\n+\tif (tb[NFTA_MATH_SREG]) {\n+\t\tmath->sreg = ntohl(mnl_attr_get_u32(tb[NFTA_MATH_SREG]));\n+\t\te->flags |= (1 << NFTNL_EXPR_MATH_SREG);\n+\t}\n+\n+\tif (tb[NFTA_MATH_DREG]) {\n+\t\tmath->dreg = ntohl(mnl_attr_get_u32(tb[NFTA_MATH_DREG]));\n+\t\te->flags |= (1 << NFTNL_EXPR_MATH_DREG);\n+\t}\n+\n+\tif (tb[NFTA_MATH_OP]) {\n+\t\tmath->op = ntohl(mnl_attr_get_u32(tb[NFTA_MATH_OP]));\n+\t\te->flags |= (1 << NFTNL_EXPR_MATH_OP);\n+\t}\n+\n+\tif (tb[NFTA_MATH_BITMASK]) {\n+\t\tmath->bitmask = ntohl(mnl_attr_get_u32(tb[NFTA_MATH_BITMASK]));\n+\t\te->flags |= (1 << NFTNL_EXPR_MATH_BITMASK);\n+\t}\n+\n+\treturn 0;\n+}\n+\n+static const char op2char(enum nft_math_op op)\n+{\n+\tswitch (op) {\n+\tcase NFT_MATH_OP_INC:\n+\t\treturn '+';\n+\tcase NFT_MATH_OP_DEC:\n+\t\treturn '-';\n+\tdefault:\n+\t\treturn '?';\n+\t}\n+}\n+\n+static int\n+nftnl_expr_math_snprintf(char *buf, size_t len,\n+\t\t\t uint32_t flags, const struct nftnl_expr *e)\n+{\n+\tstruct nftnl_expr_math *math = nftnl_expr_data(e);\n+\n+\treturn snprintf(buf, len, \"mask 0x%.8x reg %u %c 1 => %u\",\n+\t\t\tmath->bitmask, math->sreg, op2char(math->op),\n+\t\t\tmath->dreg);\n+}\n+\n+static struct attr_policy math_attr_policy[__NFTNL_EXPR_MATH_MAX] = {\n+\t[NFTNL_EXPR_MATH_SREG]\t\t= { .maxlen = sizeof(uint32_t) },\n+\t[NFTNL_EXPR_MATH_DREG]\t\t= { .maxlen = sizeof(uint32_t) },\n+\t[NFTNL_EXPR_MATH_BITMASK]\t= { .maxlen = sizeof(uint32_t) },\n+\t[NFTNL_EXPR_MATH_OP]\t\t= { .maxlen = sizeof(uint32_t) },\n+};\n+\n+struct expr_ops expr_ops_math = {\n+\t.name\t\t= \"math\",\n+\t.alloc_len\t= sizeof(struct nftnl_expr_math),\n+\t.nftnl_max_attr\t= __NFTNL_EXPR_MATH_MAX - 1,\n+\t.attr_policy\t= math_attr_policy,\n+\t.set\t\t= nftnl_expr_math_set,\n+\t.get\t\t= nftnl_expr_math_get,\n+\t.parse\t\t= nftnl_expr_math_parse,\n+\t.build\t\t= nftnl_expr_math_build,\n+\t.output\t\t= nftnl_expr_math_snprintf,\n+};\ndiff --git a/src/expr_ops.c b/src/expr_ops.c\nindex b85f472..b654fa0 100644\n--- a/src/expr_ops.c\n+++ b/src/expr_ops.c\n@@ -43,6 +43,7 @@ extern struct expr_ops expr_ops_synproxy;\n extern struct expr_ops expr_ops_tunnel;\n extern struct expr_ops expr_ops_osf;\n extern struct expr_ops expr_ops_xfrm;\n+extern struct expr_ops expr_ops_math;\n \n static struct expr_ops expr_ops_notrack = {\n \t.name\t= \"notrack\",\n@@ -89,6 +90,7 @@ static struct expr_ops *expr_ops[] = {\n \t&expr_ops_tunnel,\n \t&expr_ops_osf,\n \t&expr_ops_xfrm,\n+\t&expr_ops_math,\n \tNULL,\n };\n \n","prefixes":["libnftnl","v3"]}