This is the JSON analogue of the neighbors table. By using the netlink_query_common function to query the available netlink attributes.
Signed-off-by: Alexander Sarmanow asarmanow@gmail.com --- Makefile | 1 + README.rst | 15 +++++++++ man/batctl.8 | 3 ++ neighbors_json.c | 82 ++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 101 insertions(+) create mode 100644 neighbors_json.c
diff --git a/Makefile b/Makefile index 9dfcfde..874dc2f 100755 --- a/Makefile +++ b/Makefile @@ -59,6 +59,7 @@ $(eval $(call add_command,multicast_fanout,y)) $(eval $(call add_command,multicast_forceflood,y)) $(eval $(call add_command,multicast_mode,y)) $(eval $(call add_command,neighbors,y)) +$(eval $(call add_command,neighbors_json,y)) $(eval $(call add_command,network_coding,y)) $(eval $(call add_command,orig_interval,y)) $(eval $(call add_command,originators,y)) diff --git a/README.rst b/README.rst index c884bb3..f0ce43a 100644 --- a/README.rst +++ b/README.rst @@ -371,6 +371,21 @@ Example:: [{"hard_ifindex":7,"orig_address":"fe:fe:00:00:01:01","best":true,"last_seen_msecs":700,"neigh_address":"fe:fe:00:00:02:01","tq":119},{"hard_ifindex":2,"orig_address":"fe:fe:00:00:03:01","best":true,"last_seen_msecs":1040,"neigh_address":"fe:fe:00:00:02:01","tq":116},{"hard_ifindex":7,"orig_address":"fe:fe:00:00:04:01","best":true,"last_seen_msecs":700,"neigh_address":"fe:fe:00:00:02:01","tq":119},{"hard_ifindex":2,"orig_address":"fe:fe:00:00:05:01","best":true,"last_seen_msecs":270,"neigh_address":"fe:fe:00:00:02:01","tq":140},{"hard_ifindex":2,"orig_address":"fe:fe:00:00:06:01","best":true,"last_seen_msecs":770,"neigh_address":"fe:fe:00:00:02:01","tq":91}]
+batctl neighbors_json +===================== + +display the Neighbors JSON (analogue of the neighbors table) + +Usage:: + + batctl neighbors_json + +Example:: + + $ batctl neighbors_json|nj + [{"hard_ifindex":2,"last_seen_msecs":650,"neigh_address":"fe:fe:00:00:01:01"},{"hard_ifindex":2,"last_seen_msecs":650,"neigh_address":"fe:fe:00:00:01:02"}] + + batctl interface ================
diff --git a/man/batctl.8 b/man/batctl.8 index 155791d..1130a81 100644 --- a/man/batctl.8 +++ b/man/batctl.8 @@ -304,6 +304,9 @@ seen by each individual node. .RS 7 List of debug JSONs: .RS 10 +- neighbors_json|nj +.RE +.RS 10 - originators_json|oj .RE .RE diff --git a/neighbors_json.c b/neighbors_json.c new file mode 100644 index 0000000..7051c63 --- /dev/null +++ b/neighbors_json.c @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) B.A.T.M.A.N. contributors: + * + * Alexander Sarmanow asarmanow@gmail.com + * + * License-Filename: LICENSES/preferred/GPL-2.0 + */ + +#include <net/if.h> +#include <netinet/if_ether.h> +#include <netlink/netlink.h> +#include <netlink/genl/genl.h> +#include <netlink/genl/ctrl.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> + +#include "batman_adv.h" +#include "debug.h" +#include "main.h" +#include "netlink.h" +#include "genl_json.h" + +static int neighbors_json_callback(struct nl_msg *msg, void *arg) +{ + struct nlattr *attrs[BATADV_ATTR_MAX+1]; + struct nlmsghdr *nlh = nlmsg_hdr(msg); + struct nlquery_opts *query_opts = arg; + struct json_opts *json_opts; + struct genlmsghdr *ghdr; + + json_opts = container_of(query_opts, struct json_opts, query_opts); + + if (!genlmsg_valid_hdr(nlh, 0)) { + fputs("Received invalid data from kernel.\n", stderr); + exit(1); + } + + ghdr = nlmsg_data(nlh); + + if (ghdr->cmd != BATADV_CMD_GET_NEIGHBORS) + return NL_OK; + + if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0), + genlmsg_len(ghdr), batadv_netlink_policy)) { + fputs("Received invalid data from kernel.\n", stderr); + exit(1); + } + + netlink_print_json_entries(attrs, json_opts); + json_opts->is_first = 0; + + return NL_OK; +} + +static int netlink_print_neighbors_json(struct state *state) +{ + int ret; + struct json_opts json_opts = { + .is_first = 1, + .query_opts = { + .err = 0, + }, + }; + + putc('[', stdout); + ret = netlink_query_common(state, state->mesh_ifindex, + BATADV_CMD_GET_NEIGHBORS, + neighbors_json_callback, + NLM_F_DUMP, &json_opts.query_opts); + puts("]\n"); + + return ret; +} + +static struct debug_json_data batctl_debug_json_neighbors = { + .netlink_fn = netlink_print_neighbors_json, +}; + +COMMAND_NAMED(DEBUGJSON, neighbors_json, "nj", handle_debug_json, + COMMAND_FLAG_MESH_IFACE | COMMAND_FLAG_NETLINK, + &batctl_debug_json_neighbors, "");