It changes the parse and snprintf functions to omit unset values.
Signed-off-by: Ana Rey <anarey@xxxxxxxxx>
---
src/expr/cmp.c | 41 ++++++++++++++++++++---------------------
1 file changed, 20 insertions(+), 21 deletions(-)
diff --git a/src/expr/cmp.c b/src/expr/cmp.c
index 5fd02e4..633e114 100644
--- a/src/expr/cmp.c
+++ b/src/expr/cmp.c
@@ -183,26 +183,20 @@ static int nft_rule_expr_cmp_json_parse(struct nft_rule_expr *e, json_t *root,
uint32_t uval32;
int base;
- if (nft_jansson_parse_val(root, "sreg", NFT_TYPE_U32, &uval32, err) < 0)
- return -1;
-
- nft_rule_expr_set_u32(e, NFT_EXPR_CMP_SREG, uval32);
+ if (nft_jansson_parse_val(root, "sreg", NFT_TYPE_U32, &uval32,
+ err) == 0)
+ nft_rule_expr_set_u32(e, NFT_EXPR_CMP_SREG, uval32);
op = nft_jansson_parse_str(root, "op", err);
- if (op == NULL)
- return -1;
-
- base = nft_str2cmp(op);
- if (base < 0)
- return -1;
-
- nft_rule_expr_set_u32(e, NFT_EXPR_CMP_OP, base);
+ if (op != NULL) {
+ base = nft_str2cmp(op);
+ if (base >= 0)
+ nft_rule_expr_set_u32(e, NFT_EXPR_CMP_OP, base);
+ }
if (nft_jansson_data_reg_parse(root, "cmpdata",
- &cmp->data, err) != DATA_VALUE)
- return -1;
-
- e->flags |= (1 << NFT_EXPR_CMP_DATA);
+ &cmp->data, err) == DATA_VALUE)
+ e->flags |= (1 << NFT_EXPR_CMP_DATA);
return 0;
#else
@@ -250,11 +244,16 @@ static int nft_rule_expr_cmp_snprintf_json(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,\"op\":\"%s\",",
- cmp->sreg, expr_cmp_str[cmp->op]);
- 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, "\"sreg\":%u,", cmp->sreg);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (e->flags & (1 << NFT_EXPR_CMP_OP)) {
+ ret = snprintf(buf + offset, len, "\"op\":\"%s\",",
+ expr_cmp_str[cmp->op]);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ ret = nft_data_reg_snprintf(buf + offset, len, &cmp->data,
NFT_OUTPUT_JSON, 0, DATA_VALUE);
SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
--
2.0.0
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