From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ana Rey Subject: [libnftnl PATCH 5/5] expr: byteorder: Do not print unset values in json Date: Thu, 19 Jun 2014 17:07:10 +0200 Message-ID: <1403190430-22173-6-git-send-email-anarey@gmail.com> References: <1403190430-22173-1-git-send-email-anarey@gmail.com> Cc: Ana Rey To: netfilter-devel@vger.kernel.org Return-path: Received: from mail-wg0-f52.google.com ([74.125.82.52]:40339 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933127AbaFSPH3 (ORCPT ); Thu, 19 Jun 2014 11:07:29 -0400 Received: by mail-wg0-f52.google.com with SMTP id b13so2441091wgh.35 for ; Thu, 19 Jun 2014 08:07:28 -0700 (PDT) In-Reply-To: <1403190430-22173-1-git-send-email-anarey@gmail.com> Sender: netfilter-devel-owner@vger.kernel.org List-ID: It changes the parse and the snprint functions to omit unset values. Now, This part of a json file is gotten without unset elements. [FILE EXAMPLE] Signed-off-by: Ana Rey --- src/expr/byteorder.c | 77 ++++++++++++++++++++++++++++++---------------------- 1 file changed, 44 insertions(+), 33 deletions(-) diff --git a/src/expr/byteorder.c b/src/expr/byteorder.c index e56af3f..20a89d3 100644 --- a/src/expr/byteorder.c +++ b/src/expr/byteorder.c @@ -202,35 +202,24 @@ nft_rule_expr_byteorder_json_parse(struct nft_rule_expr *e, json_t *root, uint32_t sreg, dreg, len, size; int ntoh; - if (nft_jansson_parse_reg(root, "sreg", NFT_TYPE_U32, &sreg, err) < 0) - return -1; - - nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_SREG, sreg); - - if (nft_jansson_parse_reg(root, "dreg", NFT_TYPE_U32, &dreg, err) < 0) - return -1; + if (nft_jansson_parse_reg(root, "sreg", NFT_TYPE_U32, &sreg, err) == 0) + nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_SREG, sreg); - nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_DREG, dreg); + if (nft_jansson_parse_reg(root, "dreg", NFT_TYPE_U32, &dreg, err) == 0) + nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_DREG, dreg); op = nft_jansson_parse_str(root, "op", err); - if (op == NULL) - return -1; - - ntoh = nft_str2ntoh(op); - if (ntoh < 0) - return -1; - - nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_OP, ntoh); - - if (nft_jansson_parse_val(root, "len", NFT_TYPE_U32, &len, err) < 0) - return -1; - - nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_LEN, len); + if (op != NULL) { + ntoh = nft_str2ntoh(op); + if (ntoh >= 0) + nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_OP, ntoh); + } - if (nft_jansson_parse_val(root, "size", NFT_TYPE_U32, &size, err) < 0) - return -1; + if (nft_jansson_parse_val(root, "len", NFT_TYPE_U32, &len, err) == 0) + nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_LEN, len); - nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_SIZE, size); + if (nft_jansson_parse_val(root, "size", NFT_TYPE_U32, &size, err) == 0) + nft_rule_expr_set_u32(e, NFT_EXPR_BYTEORDER_SIZE, size); return 0; #else @@ -285,15 +274,37 @@ static int nft_rule_expr_byteorder_snprintf_json(char *buf, size_t size, struct nft_expr_byteorder *byteorder = nft_expr_data(e); int len = size, offset = 0, ret; - ret = snprintf(buf, len, "\"sreg\":%u," - "\"dreg\":%u," - "\"op\":\"%s\"," - "\"len\":%u," - "\"size\":%u", - byteorder->sreg, byteorder->dreg, - expr_byteorder_str[byteorder->op], - byteorder->len, byteorder->size); - SNPRINTF_BUFFER_SIZE(ret, size, len, offset); + if (e->flags & (1 << NFT_EXPR_BYTEORDER_SREG)) { + ret = snprintf(buf + offset, len, "\"sreg\":%u,", + byteorder->sreg); + SNPRINTF_BUFFER_SIZE(ret, size, len, offset); + } + + if (e->flags & (1 << NFT_EXPR_BYTEORDER_DREG)) { + ret = snprintf(buf + offset, len, "\"dreg\":%u,", + byteorder->dreg); + SNPRINTF_BUFFER_SIZE(ret, size, len, offset); + } + + if (e->flags & (1 << NFT_EXPR_BYTEORDER_OP)) { + ret = snprintf(buf + offset, len, "\"op\":\"%s\",", + expr_byteorder_str[byteorder->op]); + SNPRINTF_BUFFER_SIZE(ret, size, len, offset); + } + + if (e->flags & (1 << NFT_EXPR_BYTEORDER_LEN)) { + ret = snprintf(buf + offset, len, "\"len\":%u,", + byteorder->len); + SNPRINTF_BUFFER_SIZE(ret, size, len, offset); + } + if (e->flags & (1 << NFT_EXPR_BYTEORDER_SIZE)) { + ret = snprintf(buf + offset, len, "\"size\":%u,", + byteorder->size); + SNPRINTF_BUFFER_SIZE(ret, size, len, offset); + } + + if (offset > 0) + offset--; return offset; } -- 2.0.0