89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <json-c/json.h>
|
||
|
|
#include <iwinfo.h>
|
||
|
|
#include <net/if.h>
|
||
|
|
|
||
|
|
#define STR(x) #x
|
||
|
|
#define XSTR(x) STR(x)
|
||
|
|
|
||
|
|
#define BATIF_PREFIX "/sys/class/net/bat0/lower_"
|
||
|
|
|
||
|
|
static struct json_object *get_stations(const struct iwinfo_ops *iw, const char *ifname) {
|
||
|
|
int len;
|
||
|
|
char buf[IWINFO_BUFSIZE];
|
||
|
|
struct json_object *stations = json_object_new_object();
|
||
|
|
|
||
|
|
if (iw->assoclist(ifname, buf, &len) == -1)
|
||
|
|
return stations;
|
||
|
|
|
||
|
|
// This is just: for entry in assoclist(ifname)
|
||
|
|
for (struct iwinfo_assoclist_entry *entry = (struct iwinfo_assoclist_entry *)buf;
|
||
|
|
(char*)(entry+1) <= buf + len; entry++) {
|
||
|
|
struct json_object *station = json_object_new_object();
|
||
|
|
|
||
|
|
json_object_object_add(station, "signal", json_object_new_int(entry->signal));
|
||
|
|
json_object_object_add(station, "noise", json_object_new_int(entry->noise));
|
||
|
|
json_object_object_add(station, "inactive", json_object_new_int(entry->inactive));
|
||
|
|
|
||
|
|
char macstr[18];
|
||
|
|
|
||
|
|
snprintf(macstr, sizeof(macstr), "%02x:%02x:%02x:%02x:%02x:%02x",
|
||
|
|
entry->mac[0], entry->mac[1], entry->mac[2],
|
||
|
|
entry->mac[3], entry->mac[4], entry->mac[5]);
|
||
|
|
|
||
|
|
json_object_object_add(stations, macstr, station);
|
||
|
|
}
|
||
|
|
|
||
|
|
return stations;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void badrequest() {
|
||
|
|
printf("Status: 400 Bad Request\n\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool interface_is_valid(const char *ifname) {
|
||
|
|
if (strlen(ifname) > IF_NAMESIZE)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if (strchr(ifname, '/') != NULL)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
char *path = alloca(1 + strlen(BATIF_PREFIX) + strlen(ifname));
|
||
|
|
sprintf(path, "%s%s", BATIF_PREFIX, ifname);
|
||
|
|
|
||
|
|
return access(path, F_OK) == 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(void) {
|
||
|
|
char *ifname = getenv("QUERY_STRING");
|
||
|
|
|
||
|
|
if (ifname == NULL)
|
||
|
|
badrequest();
|
||
|
|
|
||
|
|
if (!interface_is_valid(ifname))
|
||
|
|
badrequest();
|
||
|
|
|
||
|
|
const struct iwinfo_ops *iw = iwinfo_backend(ifname);
|
||
|
|
|
||
|
|
if (iw == NULL)
|
||
|
|
badrequest();
|
||
|
|
|
||
|
|
printf("Access-Control-Allow-Origin: *\n");
|
||
|
|
printf("Content-type: text/event-stream\n\n");
|
||
|
|
|
||
|
|
while (true) {
|
||
|
|
struct json_object *obj;
|
||
|
|
obj = get_stations(iw, ifname);
|
||
|
|
printf("data: %s\n\n", json_object_to_json_string_ext(obj, JSON_C_TO_STRING_PLAIN));
|
||
|
|
fflush(stdout);
|
||
|
|
json_object_put(obj);
|
||
|
|
usleep(150000);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|