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authorAna Rey <anarey@gmail.com>2014-06-19 19:34:23 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2014-06-23 19:55:15 +0200
commite9f3b145b8148197c01837e892b521eeb09de91c (patch)
tree7a2b37fdb4f52a1e945299382786932f05511a38 /src/expr
parent54ec205d112c911a92db57e822b86aa590345a12 (diff)
expr: cmp: Do not print unset values in xml file
It changes the parse and snprintf functions to omit unset values. Signed-off-by: Ana Rey <anarey@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'src/expr')
-rw-r--r--src/expr/cmp.c39
1 files changed, 22 insertions, 17 deletions
diff --git a/src/expr/cmp.c b/src/expr/cmp.c
index cc01573..2ed05f5 100644
--- a/src/expr/cmp.c
+++ b/src/expr/cmp.c
@@ -221,26 +221,23 @@ static int nft_rule_expr_cmp_xml_parse(struct nft_rule_expr *e, mxml_node_t *tre
uint32_t sreg;
if (nft_mxml_reg_parse(tree, "sreg", &sreg, MXML_DESCEND_FIRST,
- NFT_XML_MAND, err) != 0)
- return -1;
- nft_rule_expr_set_u32(e, NFT_EXPR_CMP_SREG, sreg);
+ NFT_XML_MAND, err) == 0)
+ nft_rule_expr_set_u32(e, NFT_EXPR_CMP_SREG, sreg);
op = nft_mxml_str_parse(tree, "op", MXML_DESCEND_FIRST, NFT_XML_MAND,
err);
- if (op == NULL)
- return -1;
+ if (op != NULL) {
+ op_value = nft_str2cmp(op);
+ if (op_value < 0)
+ return -1;
- op_value = nft_str2cmp(op);
- if (op_value < 0)
- return -1;
- nft_rule_expr_set_u32(e, NFT_EXPR_CMP_OP, op_value);
+ nft_rule_expr_set_u32(e, NFT_EXPR_CMP_OP, op_value);
+ }
if (nft_mxml_data_reg_parse(tree, "cmpdata",
&cmp->data, NFT_XML_MAND,
- err) != DATA_VALUE)
- return -1;
-
- e->flags |= (1 << NFT_EXPR_CMP_DATA);
+ err) == DATA_VALUE)
+ e->flags |= (1 << NFT_EXPR_CMP_DATA);
return 0;
#else
@@ -272,11 +269,19 @@ static int nft_rule_expr_cmp_snprintf_xml(char *buf, size_t size,
struct nft_expr_cmp *cmp = nft_expr_data(e);
int len = size, offset = 0, ret;
- ret = snprintf(buf, len, "<sreg>%u</sreg><op>%s</op>",
- cmp->sreg, expr_cmp_str[cmp->op]);
- SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ if (e->flags & (1 << NFT_EXPR_CMP_SREG)) {
+ ret = snprintf(buf, len, "<sreg>%u</sreg>",
+ cmp->sreg);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
- ret = nft_data_reg_snprintf(buf+offset, len, &cmp->data,
+ if (e->flags & (1 << NFT_EXPR_CMP_SREG)) {
+ ret = snprintf(buf + offset, len, "<op>%s</op>",
+ expr_cmp_str[cmp->op]);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+
+ ret = nft_data_reg_snprintf(buf + offset, len, &cmp->data,
NFT_OUTPUT_XML, 0, DATA_VALUE);
SNPRINTF_BUFFER_SIZE(ret, size, len, offset);