modules/admin-full: luci-bwc: attempt to dlopen() libiwinfo, use it to gather radio...

diff --git a/modules/admin-full/Makefile b/modules/admin-full/Makefile
index 347a34286a5d16b5a9e5af1f0390e4b5f97cbd57..77335c399b7a02f8e4062a11a36528149df3ba95 100644 (file)
--- a/modules/admin-full/Makefile
+++ b/modules/admin-full/Makefile
@@ -2,7 +2,7 @@ include ../../build/config.mk
 include ../../build/module.mk
 include ../../build/gccconfig.mk
 
-BWC_LDFLAGS    =
+BWC_LDFLAGS    = -ldl
 BWC_CFLAGS     =
 BWC_BIN        = luci-bwc
 BWC_OBJ        = src/luci-bwc.o

diff --git a/modules/admin-full/src/luci-bwc.c b/modules/admin-full/src/luci-bwc.c
index acc07e03f323f95324988cdd7d980ab81cac2da6..9352ce8498d3f8f85eba2b3bacda7f488a51fdfa 100644 (file)
--- a/modules/admin-full/src/luci-bwc.c
+++ b/modules/admin-full/src/luci-bwc.c
@@ -31,6 +31,8 @@
 #include <sys/mman.h>
 #include <arpa/inet.h>
 
+#include <dlfcn.h>
+
 
 #define STEP_COUNT     60
 #define STEP_TIME      1
@@ -40,6 +42,7 @@
 
 #define DB_PATH                "/var/lib/luci-bwc"
 #define DB_IF_FILE     DB_PATH "/if/%s"
+#define DB_RD_FILE     DB_PATH "/radio/%s"
 #define DB_CN_FILE     DB_PATH "/connections"
 #define DB_LD_FILE     DB_PATH "/load"
 
@@ -80,6 +83,13 @@ struct load_entry {
        uint16_t load15;
 };
 
+struct radio_entry {
+       uint64_t time;
+       uint16_t rate;
+       uint8_t  rssi;
+       uint8_t  noise;
+};
+
 
 static uint64_t htonll(uint64_t value)
 {
@@ -145,6 +155,10 @@ static void reset_countdown(int sig)
 static char *progname;
 static int prognamelen;
 
+static int (*iw_get_rate)(const char *, int *) = NULL;
+static int (*iw_get_rssi)(const char *, int *) = NULL;
+static int (*iw_get_noise)(const char *, int *) = NULL;
+
 
 static int init_directory(char *path)
 {
@@ -253,6 +267,63 @@ static void umap_file(struct file_map *m)
                close(m->fd);
 }
 
+static void * iwinfo_open(void)
+{
+       return dlopen("/usr/lib/lua/iwinfo.so", RTLD_LAZY);
+}
+
+static int iwinfo_update(
+       void *iw, const char *ifname, uint16_t *rate, uint8_t *rssi, uint8_t *noise
+) {
+       int (*probe)(const char *);
+       int val;
+
+       if (!iw_get_rate)
+       {
+               if ((probe = dlsym(iw, "nl80211_probe")) != NULL && probe(ifname))
+               {
+                       iw_get_rate  = dlsym(iw, "nl80211_get_bitrate");
+                       iw_get_rssi  = dlsym(iw, "nl80211_get_signal");
+                       iw_get_noise = dlsym(iw, "nl80211_get_noise");
+               }
+               else if ((probe = dlsym(iw, "madwifi_probe")) != NULL && probe(ifname))
+               {
+                       iw_get_rate  = dlsym(iw, "madwifi_get_bitrate");
+                       iw_get_rssi  = dlsym(iw, "madwifi_get_signal");
+                       iw_get_noise = dlsym(iw, "madwifi_get_noise");
+               }
+               else if ((probe = dlsym(iw, "wl_probe")) != NULL && probe(ifname))
+               {
+                       iw_get_rate  = dlsym(iw, "wl_get_bitrate");
+                       iw_get_rssi  = dlsym(iw, "wl_get_signal");
+                       iw_get_noise = dlsym(iw, "wl_get_noise");
+               }
+               else
+               {
+                       return 0;
+               }
+       }
+
+       *rate = (iw_get_rate && !iw_get_rate(ifname, &val)) ? val : 0;
+       *rssi = (iw_get_rssi && !iw_get_rssi(ifname, &val)) ? val : 0;
+       *noise = (iw_get_noise && !iw_get_noise(ifname, &val)) ? val : 0;
+
+       return 1;
+}
+
+static void iwinfo_close(void *iw)
+{
+       void (*do_close)(void);
+
+       if ((do_close = dlsym(iw, "nl80211_close")) != NULL) do_close();
+       if ((do_close = dlsym(iw, "madwifi_close")) != NULL) do_close();
+       if ((do_close = dlsym(iw, "wl_close"))      != NULL) do_close();
+       if ((do_close = dlsym(iw, "wext_close"))    != NULL) do_close();
+       if ((do_close = dlsym(iw, "iwinfo_close"))  != NULL) do_close();
+
+       dlclose(iw);
+}
+
 
 static int update_ifstat(
        const char *ifname, uint64_t rxb, uint64_t rxp, uint64_t txb, uint64_t txp
@@ -284,6 +355,35 @@ static int update_ifstat(
        return update_file(path, &e, sizeof(struct traffic_entry));
 }
 
+static int update_radiostat(
+       const char *ifname, uint16_t rate, uint8_t rssi, uint8_t noise
+) {
+       char path[1024];
+
+       struct stat s;
+       struct radio_entry e;
+
+       snprintf(path, sizeof(path), DB_RD_FILE, ifname);
+
+       if (stat(path, &s))
+       {
+               if (init_file(path, sizeof(struct radio_entry)))
+               {
+                       fprintf(stderr, "Failed to init %s: %s\n",
+                                       path, strerror(errno));
+
+                       return -1;
+               }
+       }
+
+       e.time  = htonll(time(NULL));
+       e.rate  = htons(rate);
+       e.rssi  = rssi;
+       e.noise = noise;
+
+       return update_file(path, &e, sizeof(struct radio_entry));
+}
+
 static int update_cnstat(uint32_t udp, uint32_t tcp, uint32_t other)
 {
        char path[1024];
@@ -345,10 +445,13 @@ static int run_daemon(void)
        FILE *info;
        uint64_t rxb, txb, rxp, txp;
        uint32_t udp, tcp, other;
+       uint16_t rate;
+       uint8_t rssi, noise;
        float lf1, lf5, lf15;
        char line[1024];
        char ifname[16];
-
+       int i;
+       void *iw;
        struct sigaction sa;
 
        struct stat s;
@@ -390,6 +493,9 @@ static int run_daemon(void)
                return 1;
        }
 
+       /* initialize iwinfo */
+       iw = iwinfo_open();
+
        /* go */
        for (reset_countdown(0); countdown >= 0; countdown--)
        {
@@ -414,6 +520,26 @@ static int run_daemon(void)
                        fclose(info);
                }
 
+               if (iw)
+               {
+                       for (i = 0; i < 5; i++)
+                       {
+#define iwinfo_checkif(pattern) \
+                               do {                                                      \
+                                       snprintf(ifname, sizeof(ifname), pattern, i);         \
+                                       if (iwinfo_update(iw, ifname, &rate, &rssi, &noise))  \
+                                       {                                                     \
+                                               update_radiostat(ifname, rate, rssi, noise);      \
+                                               continue;                                         \
+                                       }                                                     \
+                               } while(0)
+
+                               iwinfo_checkif("wlan%d");
+                               iwinfo_checkif("ath%d");
+                               iwinfo_checkif("wl%d");
+                       }
+               }
+
                if ((info = fopen(ipc, "r")) != NULL)
                {
                        udp   = 0;
@@ -458,6 +584,9 @@ static int run_daemon(void)
 
        unlink(PID_PATH);
 
+       if (iw)
+               iwinfo_close(iw);
+
        return 0;
 }
 
@@ -520,6 +649,40 @@ static int run_dump_ifname(const char *ifname)
        return 0;
 }
 
+static int run_dump_radio(const char *ifname)
+{
+       int i;
+       char path[1024];
+       struct file_map m;
+       struct radio_entry *e;
+
+       check_daemon();
+       snprintf(path, sizeof(path), DB_RD_FILE, ifname);
+
+       if (mmap_file(path, sizeof(struct radio_entry), &m))
+       {
+               fprintf(stderr, "Failed to open %s: %s\n", path, strerror(errno));
+               return 1;
+       }
+
+       for (i = 0; i < m.size; i += sizeof(struct radio_entry))
+       {
+               e = (struct radio_entry *) &m.mmap[i];
+
+               if (!e->time)
+                       continue;
+
+               printf("[ %" PRIu64 ", %d, %d, %d ]%s\n",
+                       ntohll(e->time),
+                       e->rate, e->rssi, e->noise,
+                       ((i + sizeof(struct radio_entry)) < m.size) ? "," : "");
+       }
+
+       umap_file(&m);
+
+       return 0;
+}
+
 static int run_dump_conns(void)
 {
        int i;
@@ -599,7 +762,7 @@ int main(int argc, char *argv[])
        for (opt = 0; opt < argc; opt++)
                prognamelen += 1 + strlen(argv[opt]);
 
-       while ((opt = getopt(argc, argv, "t:i:cl")) > -1)
+       while ((opt = getopt(argc, argv, "t:i:r:cl")) > -1)
        {
                switch (opt)
                {
@@ -612,6 +775,11 @@ int main(int argc, char *argv[])
                                        return run_dump_ifname(optarg);
                                break;
 
+                       case 'r':
+                               if (optarg)
+                                       return run_dump_radio(optarg);
+                               break;
+
                        case 'c':
                                return run_dump_conns();
 
@@ -626,9 +794,10 @@ int main(int argc, char *argv[])
        fprintf(stderr,
                "Usage:\n"
                "       %s [-t timeout] -i ifname\n"
+               "       %s [-t timeout] -r radiodev\n"
                "       %s [-t timeout] -c\n"
                "       %s [-t timeout] -l\n",
-                       argv[0], argv[0], argv[0]
+                       argv[0], argv[0], argv[0], argv[0]
        );
 
        return 1;