It changes the parse and snprintf functions to omit unset values.
Signed-off-by: Ana Rey <anarey@xxxxxxxxx>
---
src/chain.c | 166 ++++++++++++++++++++++++++++++++++--------------------------
1 file changed, 95 insertions(+), 71 deletions(-)
diff --git a/src/chain.c b/src/chain.c
index a3872a0..ad9da51 100644
--- a/src/chain.c
+++ b/src/chain.c
@@ -575,40 +575,28 @@ int nft_jansson_parse_chain(struct nft_chain *c, json_t *tree,
return -1;
name = nft_jansson_parse_str(root, "name", err);
- if (name == NULL)
- return -1;
-
- nft_chain_attr_set_str(c, NFT_CHAIN_ATTR_NAME, name);
+ if (name != NULL)
+ nft_chain_attr_set_str(c, NFT_CHAIN_ATTR_NAME, name);
if (nft_jansson_parse_val(root, "handle", NFT_TYPE_U64, &handle,
- err) < 0)
- return -1;
-
- nft_chain_attr_set_u64(c,NFT_CHAIN_ATTR_HANDLE, handle);
+ err) == 0)
+ nft_chain_attr_set_u64(c,NFT_CHAIN_ATTR_HANDLE, handle);
if (nft_jansson_parse_val(root, "bytes", NFT_TYPE_U64, &bytes,
- err) < 0)
- return -1;
-
- nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_BYTES, bytes);
+ err) == 0)
+ nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_BYTES, bytes);
if (nft_jansson_parse_val(root, "packets", NFT_TYPE_U64, &packets,
- err) < 0)
- return -1;
-
- nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_PACKETS, packets);
-
- if (nft_jansson_parse_family(root, &family, err) != 0)
- return -1;
+ err) == 0)
+ nft_chain_attr_set_u64(c, NFT_CHAIN_ATTR_PACKETS, packets);
- nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_FAMILY, family);
+ if (nft_jansson_parse_family(root, &family, err) == 0)
+ nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_FAMILY, family);
table = nft_jansson_parse_str(root, "table", err);
- if (table == NULL)
- return -1;
-
- nft_chain_attr_set_str(c, NFT_CHAIN_ATTR_TABLE, table);
+ if (table != NULL)
+ nft_chain_attr_set_str(c, NFT_CHAIN_ATTR_TABLE, table);
if (nft_jansson_parse_val(root, "use", NFT_TYPE_U32, &use, err) == 0)
nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_USE, use);
@@ -616,39 +604,33 @@ int nft_jansson_parse_chain(struct nft_chain *c, json_t *tree,
if (nft_jansson_node_exist(root, "hooknum")) {
type = nft_jansson_parse_str(root, "type", err);
- if (type == NULL)
- return -1;
-
- nft_chain_attr_set_str(c, NFT_CHAIN_ATTR_TYPE, type);
+ if (type != NULL)
+ nft_chain_attr_set_str(c, NFT_CHAIN_ATTR_TYPE, type);
if (nft_jansson_parse_val(root, "prio", NFT_TYPE_S32,
- &prio, err) < 0)
- return -1;
-
- nft_chain_attr_set_s32(c, NFT_CHAIN_ATTR_PRIO, prio);
+ &prio, err) == 0)
+ nft_chain_attr_set_s32(c, NFT_CHAIN_ATTR_PRIO, prio);
hooknum_str = nft_jansson_parse_str(root, "hooknum", err);
- if (hooknum_str == NULL)
- return -1;
-
- hooknum = nft_str2hooknum(c->family, hooknum_str);
- if (hooknum == -1)
- return -1;
-
- nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_HOOKNUM, hooknum);
+ if (hooknum_str != NULL) {
+ hooknum = nft_str2hooknum(c->family, hooknum_str);
+ if (hooknum == -1)
+ return -1;
+ nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_HOOKNUM,
+ hooknum);
+ }
policy = nft_jansson_parse_str(root, "policy", err);
- if (policy == NULL)
- return -1;
-
- if (nft_str2verdict(policy, &policy_num) != 0) {
- errno = EINVAL;
- err->node_name = "policy";
- err->error = NFT_PARSE_EBADTYPE;
- return -1;
+ if (policy != NULL) {
+ if (nft_str2verdict(policy, &policy_num) != 0) {
+ errno = EINVAL;
+ err->node_name = "policy";
+ err->error = NFT_PARSE_EBADTYPE;
+ return -1;
+ }
+ nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_POLICY,
+ policy_num);
}
-
- nft_chain_attr_set_u32(c, NFT_CHAIN_ATTR_POLICY, policy_num);
}
return 0;
@@ -821,32 +803,74 @@ static int nft_chain_snprintf_json(char *buf, size_t size, struct nft_chain *c)
{
int ret, len = size, offset = 0;
- ret = snprintf(buf, len,
- "{\"chain\":{"
- "\"name\":\"%s\","
- "\"handle\":%"PRIu64","
- "\"bytes\":%"PRIu64","
- "\"packets\":%"PRIu64","
- "\"family\":\"%s\","
- "\"table\":\"%s\","
- "\"use\":%d",
- c->name, c->handle, c->bytes, c->packets,
- nft_family2str(c->family),
- c->table, c->use);
- SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ ret = snprintf(buf, len, "{\"chain\":{");
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+
+ ret = 0;
+ if (c->flags & (1 << NFT_CHAIN_ATTR_NAME)) {
+ ret = snprintf(buf + offset, len, "\"name\":\"%s\",", c->name);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_HANDLE)) {
+ ret = snprintf(buf + offset, len, "\"handle\":%"PRIu64",",
+ c->handle);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_BYTES)) {
+ ret = snprintf(buf + offset, len, "\"bytes\":%"PRIu64",",
+ c->bytes);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_PACKETS)) {
+ ret = snprintf(buf + offset, len, "\"packets\":%"PRIu64",",
+ c->packets);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_FAMILY)) {
+ ret = snprintf(buf + offset, len, "\"family\":\"%s\",",
+ nft_family2str(c->family));
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_FAMILY)) {
+ ret = snprintf(buf + offset, len, "\"table\":\"%s\",",
+ c->table);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_USE)) {
+ ret = snprintf(buf + offset, len, "\"use\":%d,", c->use);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
if (c->flags & (1 << NFT_CHAIN_ATTR_HOOKNUM)) {
- ret = snprintf(buf+offset, len,
- ",\"type\":\"%s\","
- "\"hooknum\":\"%s\","
- "\"prio\":%d,"
- "\"policy\":\"%s\"",
- c->type, nft_hooknum2str(c->family, c->hooknum),
- c->prio, nft_verdict2str(c->policy));
+ if (c->flags & (1 << NFT_CHAIN_ATTR_TYPE)) {
+ ret = snprintf(buf + offset, len, "\"type\":\"%s\",",
+ c->type);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+
+ ret = snprintf(buf + offset, len, "\"hooknum\":\"%s\",",
+ nft_hooknum2str(c->family, c->hooknum));
SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+
+ if (c->flags & (1 << NFT_CHAIN_ATTR_PRIO)) {
+ ret = snprintf(buf + offset, len, "\"prio\":%d,",
+ c->prio);
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
+ if (c->flags & (1 << NFT_CHAIN_ATTR_POLICY)) {
+ ret = snprintf(buf + offset, len, "\"policy\":\"%s\",",
+ nft_verdict2str(c->policy));
+ SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
+ }
}
- ret = snprintf(buf+offset, len, "}}");
+ /* If ret is not 0, some values are printed. So, It's necessary to
+ * delete the last comma character
+ */
+ if (ret > 0)
+ offset--;
+
+ ret = snprintf(buf + offset, len, "}}");
SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
return offset;
--
2.0.0
--
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