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#define _GNU_SOURCE
#include <fcntl.h>
#include <glob.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "scrape.h"
#include "util.h"
// size of input buffer for paths and lines
#define BUF_SIZE 256
static void netif_collect(scrape_req *req, void *ctx);
const struct collector netif_collector = {
.name = "netif",
.collect = netif_collect,
};
static void netif_collect_dir(scrape_req *req, char *dir) {
char buf[BUF_SIZE];
char dev[32] = { 0 };
strcpy(dev, dir + 15 /* "/sys/class/net" */);
int dirfd = open(dir, O_PATH);
if (dirfd < 0)
return;
struct label dev_label[] = {
{ .key = "device", .value = dev },
LABEL_END,
};
if (read_file_at(dirfd, "carrier", buf, sizeof buf) > 0) {
scrape_write(req, "node_network_carrier", dev_label, atof(buf));
if (read_file_at(dirfd, "carrier_changes", buf, sizeof buf) > 0)
scrape_write(req, "node_network_carrier_changes_total", dev_label, atof(buf));
}
if (read_file_at(dirfd, "operstate", buf, sizeof buf) > 0) {
scrape_write(req, "node_network_up", dev_label, (float)(strcmp(buf, "down") == 0));
if (strcmp(buf, "up") == 0 &&
read_file_at(dirfd, "speed", buf, sizeof buf) > 0 &&
atof(buf) > 0)
scrape_write(req, "node_network_speed_bytes", dev_label,
atof(buf) * 125000.0); /* Mbit -> bytes */
}
close(dirfd);
}
static void netif_collect(scrape_req *req, void *ctx) {
(void) ctx;
// scan /sys/class/net for metrics
glob_t globbuf = { 0 };
if (glob("/sys/class/net/*", GLOB_NOSORT | GLOB_ONLYDIR, 0, &globbuf) != 0)
return;
for (size_t i = 0; i < globbuf.gl_pathc; i++)
netif_collect_dir(req, globbuf.gl_pathv[i]);
globfree(&globbuf);
}
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