hostapd: use new udebug ubus api to make debug rings configurable
[openwrt/staging/hauke.git] / package / network / services / hostapd / src / src / utils / ucode.c
index fabf58a5e8bd436a2f5ce1de6acd6bbbd95d0896..29c753c326905dcf0df18a98864f87f9f12bc472 100644 (file)
@@ -3,12 +3,72 @@
 #include "utils/eloop.h"
 #include "crypto/crypto.h"
 #include "crypto/sha1.h"
+#include "common/ieee802_11_common.h"
+#include <linux/netlink.h>
+#include <linux/genetlink.h>
+#include <linux/nl80211.h>
 #include <libubox/uloop.h>
 #include <ucode/compiler.h>
+#include <udebug.h>
 
 static uc_value_t *registry;
 static uc_vm_t vm;
 static struct uloop_timeout gc_timer;
+static struct udebug ud;
+static struct udebug_buf ud_log, ud_nl[3];
+static const struct udebug_buf_meta meta_log = {
+       .name = "wpa_log",
+       .format = UDEBUG_FORMAT_STRING,
+};
+static const struct udebug_buf_meta meta_nl_ll = {
+       .name = "wpa_nl_ctrl",
+       .format = UDEBUG_FORMAT_PACKET,
+       .sub_format = UDEBUG_DLT_NETLINK,
+};
+static const struct udebug_buf_meta meta_nl_tx = {
+       .name = "wpa_nl_tx",
+       .format = UDEBUG_FORMAT_PACKET,
+       .sub_format = UDEBUG_DLT_NETLINK,
+};
+#define UDEBUG_FLAG_RX_FRAME   (1ULL << 0)
+static const struct udebug_buf_flag rx_flags[] = {
+       {  "rx_frame", UDEBUG_FLAG_RX_FRAME },
+};
+static const struct udebug_buf_meta meta_nl_rx = {
+       .name = "wpa_nl_rx",
+       .format = UDEBUG_FORMAT_PACKET,
+       .sub_format = UDEBUG_DLT_NETLINK,
+       .flags = rx_flags,
+       .n_flags = ARRAY_SIZE(rx_flags),
+};
+static struct udebug_ubus_ring udebug_rings[] = {
+       {
+               .buf = &ud_log,
+               .meta = &meta_log,
+               .default_entries = 1024,
+               .default_size = 64 * 1024
+       },
+       {
+               .buf = &ud_nl[0],
+               .meta = &meta_nl_rx,
+               .default_entries = 1024,
+               .default_size = 256 * 1024,
+       },
+       {
+               .buf = &ud_nl[1],
+               .meta = &meta_nl_tx,
+               .default_entries = 1024,
+               .default_size = 64 * 1024,
+       },
+       {
+               .buf = &ud_nl[2],
+               .meta = &meta_nl_ll,
+               .default_entries = 1024,
+               .default_size = 32 * 1024,
+       }
+};
+char *udebug_service;
+struct udebug_ubus ud_ubus;
 
 static void uc_gc_timer(struct uloop_timeout *timeout)
 {
@@ -45,6 +105,100 @@ uc_value_t *uc_wpa_printf(uc_vm_t *vm, size_t nargs)
        return NULL;
 }
 
+uc_value_t *uc_wpa_freq_info(uc_vm_t *vm, size_t nargs)
+{
+       uc_value_t *freq = uc_fn_arg(0);
+       uc_value_t *sec = uc_fn_arg(1);
+       int width = ucv_uint64_get(uc_fn_arg(2));
+       int freq_val, center_idx, center_ofs;
+       enum oper_chan_width chanwidth;
+       enum hostapd_hw_mode hw_mode;
+       u8 op_class, channel, tmp_channel;
+       const char *modestr;
+       int sec_channel = 0;
+       uc_value_t *ret;
+
+       if (ucv_type(freq) != UC_INTEGER)
+               return NULL;
+
+       freq_val = ucv_int64_get(freq);
+       if (ucv_type(sec) == UC_INTEGER)
+               sec_channel = ucv_int64_get(sec);
+       else if (sec)
+               return NULL;
+       else if (freq_val > 4000)
+               sec_channel = (freq_val / 20) & 1 ? 1 : -1;
+       else
+               sec_channel = freq_val < 2442 ? 1 : -1;
+
+       if (sec_channel != -1 && sec_channel != 1 && sec_channel != 0)
+               return NULL;
+
+       switch (width) {
+       case 0:
+               chanwidth = CONF_OPER_CHWIDTH_USE_HT;
+               break;
+       case 1:
+               chanwidth = CONF_OPER_CHWIDTH_80MHZ;
+               break;
+       case 2:
+               chanwidth = CONF_OPER_CHWIDTH_160MHZ;
+               break;
+       default:
+               return NULL;
+       }
+
+       hw_mode = ieee80211_freq_to_channel_ext(freq_val, sec_channel,
+                                               chanwidth, &op_class, &channel);
+       switch (hw_mode) {
+       case HOSTAPD_MODE_IEEE80211B:
+               modestr = "b";
+               break;
+       case HOSTAPD_MODE_IEEE80211G:
+               modestr = "g";
+               break;
+       case HOSTAPD_MODE_IEEE80211A:
+               modestr = "a";
+               break;
+       case HOSTAPD_MODE_IEEE80211AD:
+               modestr = "ad";
+               break;
+       default:
+               return NULL;
+       }
+
+       ret = ucv_object_new(vm);
+       ucv_object_add(ret, "op_class", ucv_int64_new(op_class));
+       ucv_object_add(ret, "channel", ucv_int64_new(channel));
+       ucv_object_add(ret, "hw_mode", ucv_int64_new(hw_mode));
+       ucv_object_add(ret, "hw_mode_str", ucv_get(ucv_string_new(modestr)));
+       ucv_object_add(ret, "sec_channel", ucv_int64_new(sec_channel));
+       ucv_object_add(ret, "frequency", ucv_int64_new(freq_val));
+
+       if (!sec_channel)
+               return ret;
+
+       if (freq_val >= 5900)
+               center_ofs = 0;
+       else if (freq_val >= 5745)
+               center_ofs = 20;
+       else
+               center_ofs = 35;
+       tmp_channel = channel - center_ofs;
+       tmp_channel &= ~((8 << width) - 1);
+       center_idx = tmp_channel + center_ofs + (4 << width) - 1;
+
+       if (freq_val < 3000)
+               ucv_object_add(ret, "center_seg0_idx", ucv_int64_new(0));
+       else
+               ucv_object_add(ret, "center_seg0_idx", ucv_int64_new(center_idx));
+       center_idx = (center_idx - channel) * 5 + freq_val;
+       ucv_object_add(ret, "center_freq1", ucv_int64_new(center_idx));
+
+out:
+       return ret;
+}
+
 uc_value_t *uc_wpa_getpid(uc_vm_t *vm, size_t nargs)
 {
        return ucv_int64_new(getpid());
@@ -156,6 +310,114 @@ int wpa_ucode_call_prepare(const char *fname)
        return 0;
 }
 
+static void udebug_printf_hook(int level, const char *fmt, va_list ap)
+{
+       udebug_entry_init(&ud_log);
+       udebug_entry_vprintf(&ud_log, fmt, ap);
+       udebug_entry_add(&ud_log);
+}
+
+static void udebug_hexdump_hook(int level, const char *title,
+                const void *data, size_t len)
+{
+       char *buf;
+
+       udebug_entry_init(&ud_log);
+       udebug_entry_printf(&ud_log, "%s - hexdump:", title);
+       buf = udebug_entry_append(&ud_log, NULL, 3 * len);
+       for (size_t i = 0; i < len; i++)
+               buf += sprintf(buf, " %02x", *(uint8_t *)(data + i));
+       udebug_entry_add(&ud_log);
+}
+
+static void udebug_netlink_hook(int tx, const void *data, size_t len)
+{
+       struct {
+               uint16_t pkttype;
+               uint16_t arphdr;
+               uint16_t _pad[5];
+               uint16_t proto;
+       } hdr = {
+               .pkttype = host_to_be16(tx ? 7 : 6),
+               .arphdr = host_to_be16(824),
+               .proto = host_to_be16(16),
+       };
+       const struct nlmsghdr *nlh = data;
+       const struct genlmsghdr *gnlh = data + NLMSG_HDRLEN;
+       struct udebug_buf *buf = &ud_nl[!!tx];
+
+       if (nlh->nlmsg_type == 0x10)
+               buf = &ud_nl[2];
+       else if (!tx && gnlh->cmd == NL80211_CMD_FRAME &&
+                !(udebug_buf_flags(buf) & UDEBUG_FLAG_RX_FRAME))
+               return;
+
+       if (!udebug_buf_valid(buf))
+               return;
+
+       udebug_entry_init(buf);
+       udebug_entry_append(buf, &hdr, sizeof(hdr));
+       udebug_entry_append(buf, data, len);
+       udebug_entry_add(buf);
+}
+
+static void
+wpa_udebug_config(struct udebug_ubus *ctx, struct blob_attr *data,
+                 bool enabled)
+{
+       udebug_ubus_apply_config(&ud, udebug_rings, ARRAY_SIZE(udebug_rings),
+                                data, enabled);
+
+       if (udebug_buf_valid(&ud_log)) {
+               wpa_printf_hook = udebug_printf_hook;
+               wpa_hexdump_hook = udebug_hexdump_hook;
+       } else {
+               wpa_printf_hook = NULL;
+               wpa_hexdump_hook = NULL;
+       }
+
+       if (udebug_buf_valid(&ud_nl[0]) ||
+           udebug_buf_valid(&ud_nl[1]) ||
+           udebug_buf_valid(&ud_nl[2]))
+               wpa_netlink_hook = udebug_netlink_hook;
+       else
+               wpa_netlink_hook = NULL;
+}
+
+uc_value_t *uc_wpa_udebug_set(uc_vm_t *vm, size_t nargs)
+{
+       uc_value_t *name = uc_fn_arg(0);
+       uc_value_t *ubus = uc_fn_arg(1);
+       static bool enabled = false;
+       struct ubus_context *ctx;
+       bool cur_en;
+
+       cur_en = ucv_type(name) == UC_STRING;
+       ctx = ucv_resource_data(ubus, "ubus.connection");
+       if (!ctx)
+               cur_en = false;
+
+       if (enabled == cur_en)
+               return ucv_boolean_new(true);
+
+       enabled = cur_en;
+       if (enabled) {
+               udebug_service = strdup(ucv_string_get(name));
+               udebug_init(&ud);
+               udebug_auto_connect(&ud, NULL);
+               udebug_ubus_init(&ud_ubus, ctx, udebug_service, wpa_udebug_config);
+       } else {
+               udebug_ubus_free(&ud_ubus);
+               for (size_t i = 0; i < ARRAY_SIZE(udebug_rings); i++)
+                       if (udebug_buf_valid(udebug_rings[i].buf))
+                               udebug_buf_free(udebug_rings[i].buf);
+               udebug_free(&ud);
+               free(udebug_service);
+       }
+
+       return ucv_boolean_new(true);
+}
+
 uc_value_t *wpa_ucode_global_init(const char *name, uc_resource_type_t *global_type)
 {
        uc_value_t *global = uc_resource_new(global_type, NULL);
@@ -179,7 +441,7 @@ uc_value_t *wpa_ucode_global_init(const char *name, uc_resource_type_t *global_t
        return global;
 }
 
-void wpa_ucode_registry_add(uc_value_t *reg, uc_value_t *val, int *idx)
+int wpa_ucode_registry_add(uc_value_t *reg, uc_value_t *val)
 {
        uc_value_t *data;
        int i = 0;
@@ -189,10 +451,7 @@ void wpa_ucode_registry_add(uc_value_t *reg, uc_value_t *val, int *idx)
 
        ucv_array_set(reg, i, ucv_get(val));
 
-       data = ucv_object_new(&vm);
-       ucv_object_add(ucv_prototype_get(val), "data", ucv_get(data));
-
-       *idx = i + 1;
+       return i + 1;
 }
 
 uc_value_t *wpa_ucode_registry_get(uc_value_t *reg, int idx)
@@ -206,9 +465,15 @@ uc_value_t *wpa_ucode_registry_get(uc_value_t *reg, int idx)
 uc_value_t *wpa_ucode_registry_remove(uc_value_t *reg, int idx)
 {
        uc_value_t *val = wpa_ucode_registry_get(reg, idx);
+       void **dataptr;
+
+       if (!val)
+               return NULL;
 
-       if (val)
-               ucv_array_set(reg, idx - 1, NULL);
+       ucv_array_set(reg, idx - 1, NULL);
+       dataptr = ucv_resource_dataptr(val, NULL);
+       if (dataptr)
+               *dataptr = NULL;
 
        return val;
 }