e13a614420
The commit a080049735 ("gluon-status-page-mesh-batman-adv: Retrieve TQ of
neighbors with non-best direct link") removed the check whether a neighbor
has the BATADV_ATTR_FLAG_BEST set. But consumers may still want to filter
out or mark neighbors which don't have this flag set. To assist with such a
feature, enhance the neighbor object with an extra boolean "best" attribute
which stores whether the BATADV_ATTR_FLAG_BEST was found or not.
Reported-by: Vincent Wiemann <webmaster@codefetch.de>
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <json-c/json.h>
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#include <net/if.h>
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#include <batadv-genl.h>
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#define STR(x) #x
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#define XSTR(x) STR(x)
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struct neigh_netlink_opts {
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struct json_object *obj;
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struct batadv_nlquery_opts query_opts;
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};
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static const enum batadv_nl_attrs parse_orig_list_mandatory[] = {
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BATADV_ATTR_ORIG_ADDRESS,
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BATADV_ATTR_NEIGH_ADDRESS,
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BATADV_ATTR_TQ,
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BATADV_ATTR_HARD_IFINDEX,
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BATADV_ATTR_LAST_SEEN_MSECS,
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};
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static int parse_orig_list_netlink_cb(struct nl_msg *msg, void *arg)
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{
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struct nlattr *attrs[BATADV_ATTR_MAX+1];
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struct nlmsghdr *nlh = nlmsg_hdr(msg);
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struct batadv_nlquery_opts *query_opts = arg;
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struct genlmsghdr *ghdr;
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uint8_t *orig;
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uint8_t *dest;
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uint8_t tq;
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uint32_t hardif;
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char ifname_buf[IF_NAMESIZE], *ifname;
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struct neigh_netlink_opts *opts;
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char mac1[18];
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opts = batadv_container_of(query_opts, struct neigh_netlink_opts, query_opts);
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if (!genlmsg_valid_hdr(nlh, 0))
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return NL_OK;
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ghdr = nlmsg_data(nlh);
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if (ghdr->cmd != BATADV_CMD_GET_ORIGINATORS)
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return NL_OK;
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if (nla_parse(attrs, BATADV_ATTR_MAX, genlmsg_attrdata(ghdr, 0),
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genlmsg_len(ghdr), batadv_genl_policy))
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return NL_OK;
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if (batadv_genl_missing_attrs(attrs, parse_orig_list_mandatory,
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BATADV_ARRAY_SIZE(parse_orig_list_mandatory)))
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return NL_OK;
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orig = nla_data(attrs[BATADV_ATTR_ORIG_ADDRESS]);
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dest = nla_data(attrs[BATADV_ATTR_NEIGH_ADDRESS]);
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tq = nla_get_u8(attrs[BATADV_ATTR_TQ]);
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hardif = nla_get_u32(attrs[BATADV_ATTR_HARD_IFINDEX]);
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if (memcmp(orig, dest, 6) != 0)
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return NL_OK;
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ifname = if_indextoname(hardif, ifname_buf);
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if (!ifname)
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return NL_OK;
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sprintf(mac1, "%02x:%02x:%02x:%02x:%02x:%02x",
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orig[0], orig[1], orig[2], orig[3], orig[4], orig[5]);
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struct json_object *neigh = json_object_new_object();
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if (!neigh)
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return NL_OK;
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json_object_object_add(neigh, "tq", json_object_new_int(tq * 100 / 255));
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json_object_object_add(neigh, "ifname", json_object_new_string(ifname));
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json_object_object_add(neigh, "best", json_object_new_boolean(attrs[BATADV_ATTR_FLAG_BEST]));
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json_object_object_add(opts->obj, mac1, neigh);
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return NL_OK;
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}
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static json_object *neighbours(void) {
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struct neigh_netlink_opts opts = {
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.query_opts = {
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.err = 0,
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},
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};
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int ret;
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opts.obj = json_object_new_object();
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if (!opts.obj)
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return NULL;
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ret = batadv_genl_query("bat0", BATADV_CMD_GET_ORIGINATORS,
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parse_orig_list_netlink_cb, NLM_F_DUMP,
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&opts.query_opts);
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if (ret < 0) {
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json_object_put(opts.obj);
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return NULL;
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}
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return opts.obj;
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}
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int main(void) {
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struct json_object *obj;
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printf("Content-type: text/event-stream\n\n");
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fflush(stdout);
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while (1) {
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obj = neighbours();
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if (obj) {
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printf("data: %s\n\n", json_object_to_json_string_ext(obj, JSON_C_TO_STRING_PLAIN));
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fflush(stdout);
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json_object_put(obj);
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}
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sleep(10);
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}
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return 0;
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}
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