From 04f90247b14fdc8f40653cc0c0f45c861a6f4d6c Mon Sep 17 00:00:00 2001
From: Martin/Geno <geno+dev@fireorbit.de>
Date: Sun, 1 Jul 2018 16:49:55 +0200
Subject: [PATCH] add respondd-module-wifisettings

---
 net/respondd-module-wifisettings/Makefile     |  25 ++++
 net/respondd-module-wifisettings/README.md    |  13 +++
 net/respondd-module-wifisettings/src/Makefile |   9 ++
 .../src/respondd.c                            | 109 ++++++++++++++++++
 4 files changed, 156 insertions(+)
 create mode 100644 net/respondd-module-wifisettings/Makefile
 create mode 100644 net/respondd-module-wifisettings/README.md
 create mode 100644 net/respondd-module-wifisettings/src/Makefile
 create mode 100644 net/respondd-module-wifisettings/src/respondd.c

diff --git a/net/respondd-module-wifisettings/Makefile b/net/respondd-module-wifisettings/Makefile
new file mode 100644
index 0000000..54739aa
--- /dev/null
+++ b/net/respondd-module-wifisettings/Makefile
@@ -0,0 +1,25 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=respondd-module-wifisettings
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+PKG_LICENSE:=BSD-2-Clause
+
+PKG_BUILD_DEPENDS := respondd
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/respondd-module-wifisettings
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=Add wifisettings to respondd
+  DEPENDS:=+respondd +libuci
+endef
+
+define Package/respondd-module-wifisettings/install
+	$(INSTALL_DIR) $(1)/usr/lib/respondd
+	$(CP) $(PKG_BUILD_DIR)/respondd.so $(1)/usr/lib/respondd/wifi-settings.so
+endef
+
+$(eval $(call BuildPackage,respondd-module-wifisettings))
diff --git a/net/respondd-module-wifisettings/README.md b/net/respondd-module-wifisettings/README.md
new file mode 100644
index 0000000..3ed26ac
--- /dev/null
+++ b/net/respondd-module-wifisettings/README.md
@@ -0,0 +1,13 @@
+This module adds a respondd wifisettings usage nodeinfo provider.
+The format is the following:
+
+```json
+{
+  "nodeinfo": {
+    "channel24": 11,
+    "txpower24": 22,
+    "channel5": 44,
+    "txpower5": 18,
+  }
+}
+```
diff --git a/net/respondd-module-wifisettings/src/Makefile b/net/respondd-module-wifisettings/src/Makefile
new file mode 100644
index 0000000..e7b64b1
--- /dev/null
+++ b/net/respondd-module-wifisettings/src/Makefile
@@ -0,0 +1,9 @@
+all: respondd.so
+
+CFLAGS += -Wall
+
+respondd.so: respondd.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -shared -fPIC -D_GNU_SOURCE -o $@ $^ $(LDLIBS) -luci
+
+clean:
+	rm -rf *.so
diff --git a/net/respondd-module-wifisettings/src/respondd.c b/net/respondd-module-wifisettings/src/respondd.c
new file mode 100644
index 0000000..3a44f45
--- /dev/null
+++ b/net/respondd-module-wifisettings/src/respondd.c
@@ -0,0 +1,109 @@
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <limits.h>
+
+#include <json-c/json.h>
+#include <uci.h>
+
+#include <respondd.h>
+
+const unsigned int INVALID_CHANNEL = 0;
+const unsigned int INVALID_TXPOWER = 0;
+
+static inline unsigned char parse_option(const char *s, unsigned char invalid) {
+	char *endptr = NULL;
+	long int result;
+
+	if (!s)
+		return invalid;
+
+	result = strtol(s, &endptr, 10);
+
+	if (!endptr)
+		return invalid;
+	if ('\0' != *endptr)
+		return invalid;
+	if (result > UCHAR_MAX)
+		return invalid;
+	if (result < 0)
+		return invalid;
+
+	return (unsigned char)(result % UCHAR_MAX);
+}
+
+static struct json_object *respondd_provider_nodeinfo(void) {
+	struct uci_context *ctx = NULL;
+	struct uci_package *p = NULL;
+	struct uci_section *s;
+	struct uci_element *e;
+	struct json_object *ret = NULL, *wireless = NULL, *v;
+	unsigned char tmp;
+
+	ctx = uci_alloc_context();
+	if (!ctx)
+		goto end;
+	ctx->flags &= ~UCI_FLAG_STRICT;
+
+	wireless = json_object_new_object();
+	if (!wireless)
+		goto end;
+
+	ret = json_object_new_object();
+	if (!ret)
+		goto end;
+
+	if (uci_load(ctx, "wireless", &p))
+		goto end;
+
+	uci_foreach_element(&p->sections, e) {
+		s = uci_to_section(e);
+
+		if(!strncmp(s->type,"wifi-device",11)){
+			tmp = parse_option(uci_lookup_option_string(ctx, s, "channel"), INVALID_CHANNEL);
+			if (tmp != INVALID_CHANNEL) {
+				v = json_object_new_int64(tmp);
+				if (!v)
+					goto end;
+				if (tmp >= 1 && tmp <= 14){
+					json_object_object_add(wireless, "channel24", v);
+					tmp = parse_option(uci_lookup_option_string(ctx, s, "txpower"), INVALID_TXPOWER);
+					if (tmp != INVALID_TXPOWER) {
+						v = json_object_new_int64(tmp);
+						if (!v)
+							goto end;
+						json_object_object_add(wireless, "txpower24", v);
+					}
+				// FIXME lowes is 7, but i was able to differ between 2.4 Ghz and 5 Ghz by iwinfo_ops->frequency
+				// In EU and US it is 36, so it would be okay for the moment (https://en.wikipedia.org/wiki/List_of_WLAN_channels)
+				} else if (tmp >= 36 && tmp < 196){
+					json_object_object_add(wireless, "channel5", v);
+					tmp = parse_option(uci_lookup_option_string(ctx, s, "txpower"), INVALID_TXPOWER);
+					if (tmp != INVALID_TXPOWER) {
+						v = json_object_new_int64(tmp);
+						if (!v)
+							goto end;
+						json_object_object_add(wireless, "txpower5", v);
+					}
+				} else
+					json_object_object_add(wireless, "ErrorChannel", v);
+			}
+		}
+	}
+
+	json_object_object_add(ret, "wireless", wireless);
+end:
+	if (ctx) {
+		if (p)
+			uci_unload(ctx, p);
+			uci_free_context(ctx);
+	}
+	return ret;
+
+}
+
+const struct respondd_provider_info respondd_providers[] = {
+	{"nodeinfo", respondd_provider_nodeinfo},
+	{0,0},
+};