From: Stephen Hemminger <sthem...@microsoft.com>
Use json_print to provide json (and color) support to
ip neigh command.
Example:
$ ip -j -p neigh
[ {
"dst": "192.168.1.29",
"dev": "enp12s0",
"state": [ "FAILED" ]
},{
"dst": "192.168.1.130",
"dev": "enp12s0",
"state": [ "FAILED" ]
},{
"dst": "192.168.1.131",
"dev": "enp12s0",
"lladdr": "00:15:5d:2a:16:4f",
"state": [ "STALE" ]
}
...
Signed-off-by: Stephen Hemminger <step...@networkplumber.org>
---
ip/ipneigh.c | 140 +++++++++++++++++++++++++++++++++++++++--------------------
1 file changed, 93 insertions(+), 47 deletions(-)
diff --git a/ip/ipneigh.c b/ip/ipneigh.c
index 0735424900f6..925494dbe324 100644
--- a/ip/ipneigh.c
+++ b/ip/ipneigh.c
@@ -23,6 +23,7 @@
#include "rt_names.h"
#include "utils.h"
#include "ip_common.h"
+#include "json_print.h"
#define NUD_VALID
(NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
#define MAX_ROUNDS 10
@@ -189,6 +190,46 @@ static int ipneigh_modify(int cmd, int flags, int argc,
char **argv)
return 0;
}
+static void print_cacheinfo(const struct nda_cacheinfo *ci)
+{
+ static int hz;
+
+ if (!hz)
+ hz = get_user_hz();
+
+ if (ci->ndm_refcnt)
+ print_uint(PRINT_ANY, "refcnt",
+ " ref %u", ci->ndm_refcnt);
+
+ print_uint(PRINT_ANY, "used", " used %u", ci->ndm_used / hz);
+ print_uint(PRINT_ANY, "confirmed", "/%u", ci->ndm_confirmed / hz);
+ print_uint(PRINT_ANY, "updated", "/u", ci->ndm_updated / hz);
+}
+
+static void print_neigh_state(unsigned int nud)
+{
+
+ open_json_array(PRINT_JSON,
+ is_json_context() ? "state" : "");
+
+#define PRINT_FLAG(f) \
+ if (nud & NUD_##f) { \
+ nud &= ~NUD_##f; \
+ print_string(PRINT_ANY, NULL, " %s", #f); \
+ }
+
+ PRINT_FLAG(INCOMPLETE);
+ PRINT_FLAG(REACHABLE);
+ PRINT_FLAG(STALE);
+ PRINT_FLAG(DELAY);
+ PRINT_FLAG(PROBE);
+ PRINT_FLAG(FAILED);
+ PRINT_FLAG(NOARP);
+ PRINT_FLAG(PERMANENT);
+#undef PRINT_FLAG
+
+ close_json_array(PRINT_JSON, NULL);
+}
int print_neigh(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
@@ -221,7 +262,7 @@ int print_neigh(const struct sockaddr_nl *who, struct
nlmsghdr *n, void *arg)
if (!(filter.state&r->ndm_state) &&
!(r->ndm_flags & NTF_PROXY) &&
(r->ndm_state || !(filter.state&0x100)) &&
- (r->ndm_family != AF_DECnet))
+ (r->ndm_family != AF_DECnet))
return 0;
if (filter.master && !(n->nlmsg_flags & NLM_F_DUMP_FILTERED)) {
@@ -262,65 +303,68 @@ int print_neigh(const struct sockaddr_nl *who, struct
nlmsghdr *n, void *arg)
return 0;
}
+ open_json_object(NULL);
if (n->nlmsg_type == RTM_DELNEIGH)
- fprintf(fp, "Deleted ");
+ print_bool(PRINT_ANY, "deleted", "Deleted ", true);
else if (n->nlmsg_type == RTM_GETNEIGH)
- fprintf(fp, "miss ");
+ print_null(PRINT_ANY, "miss", "%s ", "miss");
+
if (tb[NDA_DST]) {
- fprintf(fp, "%s ",
- format_host_rta(r->ndm_family, tb[NDA_DST]));
+ const char *dst;
+
+ dst = format_host_rta(r->ndm_family, tb[NDA_DST]);
+ print_color_string(PRINT_ANY,
+ ifa_family_color(r->ndm_family),
+ "dst", "%s ", dst);
}
- if (!filter.index && r->ndm_ifindex)
- fprintf(fp, "dev %s ", ll_index_to_name(r->ndm_ifindex));
+
+ if (!filter.index && r->ndm_ifindex) {
+ if (!is_json_context())
+ fprintf(fp, "dev ");
+
+ print_color_string(PRINT_ANY, COLOR_IFNAME,
+ "dev", "%s ",
+ ll_index_to_name(r->ndm_ifindex));
+ }
+
if (tb[NDA_LLADDR]) {
+ const char *lladdr;
SPRINT_BUF(b1);
- fprintf(fp, "lladdr %s", ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
- RTA_PAYLOAD(tb[NDA_LLADDR]),
- ll_index_to_type(r->ndm_ifindex),
- b1, sizeof(b1)));
- }
- if (r->ndm_flags & NTF_ROUTER) {
- fprintf(fp, " router");
- }
- if (r->ndm_flags & NTF_PROXY) {
- fprintf(fp, " proxy");
- }
- if (tb[NDA_CACHEINFO] && show_stats) {
- struct nda_cacheinfo *ci = RTA_DATA(tb[NDA_CACHEINFO]);
- int hz = get_user_hz();
- if (ci->ndm_refcnt)
- printf(" ref %d", ci->ndm_refcnt);
- fprintf(fp, " used %d/%d/%d", ci->ndm_used/hz,
- ci->ndm_confirmed/hz, ci->ndm_updated/hz);
- }
+ lladdr = ll_addr_n2a(RTA_DATA(tb[NDA_LLADDR]),
+ RTA_PAYLOAD(tb[NDA_LLADDR]),
+ ll_index_to_type(r->ndm_ifindex),
+ b1, sizeof(b1));
- if (tb[NDA_PROBES] && show_stats) {
- __u32 p = rta_getattr_u32(tb[NDA_PROBES]);
+ if (!is_json_context())
+ fprintf(fp, "lladdr ");
- fprintf(fp, " probes %u", p);
+ print_color_string(PRINT_ANY, COLOR_MAC,
+ "lladdr", "%s", lladdr);
}
- if (r->ndm_state) {
- int nud = r->ndm_state;
-
- fprintf(fp, " ");
-
-#define PRINT_FLAG(f) if (nud & NUD_##f) { \
- nud &= ~NUD_##f; fprintf(fp, #f "%s", nud ? "," : ""); }
- PRINT_FLAG(INCOMPLETE);
- PRINT_FLAG(REACHABLE);
- PRINT_FLAG(STALE);
- PRINT_FLAG(DELAY);
- PRINT_FLAG(PROBE);
- PRINT_FLAG(FAILED);
- PRINT_FLAG(NOARP);
- PRINT_FLAG(PERMANENT);
-#undef PRINT_FLAG
+ if (r->ndm_flags & NTF_ROUTER)
+ print_null(PRINT_ANY, "router", " %s", "router");
+
+ if (r->ndm_flags & NTF_PROXY)
+ print_null(PRINT_ANY, "proxy", " %s", "proxy");
+
+ if (show_stats) {
+ if (tb[NDA_CACHEINFO])
+ print_cacheinfo(RTA_DATA(tb[NDA_CACHEINFO]));
+
+ if (tb[NDA_PROBES])
+ print_uint(PRINT_ANY, "probes", " probes %u",
+ rta_getattr_u32(tb[NDA_PROBES]));
}
- fprintf(fp, "\n");
- fflush(fp);
+ if (r->ndm_state)
+ print_neigh_state(r->ndm_state);
+
+ print_string(PRINT_FP, NULL, "\n", "");
+ close_json_object();
+ fflush(stdout);
+
return 0;
}
@@ -479,10 +523,12 @@ static int do_show_or_flush(int argc, char **argv, int
flush)
exit(1);
}
+ new_json_obj(json);
if (rtnl_dump_filter(&rth, print_neigh, stdout) < 0) {
fprintf(stderr, "Dump terminated\n");
exit(1);
}
+ delete_json_obj();
return 0;
}
--
2.16.1
