ucs_binding.c: Add control message transmission

Bug-AGL: SPEC-1177

Support control message transmission to other network
devices via json api.

Change-Id: I22af427471a379f819e626ea4d746f78f3e37a6a
Signed-off-by: Tobias Jahnke <tobias.jahnke@microchip.com>

1 files changed, 119 insertions, 22 deletions

diff --git a/ucs2-afb/ucs_binding.c b/ucs2-afb/ucs_binding.c
index b8a1ba8..ca1f756 100644
--- a/ucs2-afb/ucs_binding.c
+++ b/ucs2-afb/ucs_binding.c
@@ -24,6 +24,8 @@
 #define BUFFER_FRAME_COUNT 10 /* max frames in buffer */
 #define WAIT_TIMER_US 1000000 /* default waiting timer 1s */
 #define I2C_MAX_DATA_SZ    32 /* max. number of bytes to be written to i2c */
+#define CTRL_MAX_DATA_SZ   45 /* max. number of bytes to be written to control
+                               * channel */
 
 #include <systemd/sd-event.h>
 #include <sys/types.h>
@@ -190,6 +192,7 @@ STATIC int OnStopCB (sd_event_source *source, uint64_t usec, void *pTag) {
         UcsXml_FreeVal(ucsContextS->ucsConfig);
         ucsContextS->ucsConfig = NULL;
     }
+    return 0;
 }
 
 /**
@@ -508,6 +511,48 @@ OnExitError:
     return;
 }
 
+static json_object * ucs2_validate_command (struct afb_req request,
+        const char* func_name) {
+
+    struct json_object *j_obj = NULL;
+
+    if (!ucsContextS) {                     /* check UNICENS is initialized */
+        afb_req_fail_f(request, "unicens-init",
+                "Load a configuration before calling %s.",
+                func_name);
+        goto OnErrorExit;
+    }
+
+    j_obj = afb_req_json(request);
+    if (!j_obj) {
+        afb_req_fail_f(request,
+                "query-notjson","query=%s not a valid json entry",
+                afb_req_value(request,""));
+        goto OnErrorExit;
+    }
+
+    AFB_DEBUG("request: %s", json_object_to_json_string(j_obj));
+
+    if (json_object_get_type(j_obj)==json_type_array) {
+        int len = json_object_array_length(j_obj);
+
+        if (len == 1) {             /* only support 1 command in array */
+            j_obj = json_object_array_get_idx(j_obj, 0);
+        }
+        else {
+            afb_req_fail_f(request,
+                    "query-array",
+                    "query of multiple %s commands is not supported",
+                    func_name);
+            j_obj = NULL;
+            goto OnErrorExit;
+        }
+    }
+
+ OnErrorExit:
+    return j_obj;
+}
+
 STATIC void ucs2_writei2c_CB (void *result_ptr, void *request_ptr) {
 
     if (request_ptr){
@@ -613,44 +658,96 @@ PUBLIC void ucs2_writei2c (struct afb_req request) {
 
     struct json_object *j_obj;
 
-    /* check UNICENS is initialised */
-    if (!ucsContextS) {
-        afb_req_fail_f(request, "unicens-init","Should Load Config before using setvol");
-        goto OnErrorExit;
+    j_obj = ucs2_validate_command(request, "writei2c");
+
+    if (j_obj) {
+        ucs2_writei2c_cmd(request, j_obj);
     }
+}
 
-    j_obj = afb_req_json(request);
-    if (!j_obj) {
-        afb_req_fail_f(request, "query-notjson","query=%s not a valid json entry", afb_req_value(request,""));
-        goto OnErrorExit;
-    };
+/* write a single control message */
+STATIC void ucs2_sendmessage_cmd(struct afb_req request, json_object *j_obj) {
 
-    AFB_DEBUG("request: %s", json_object_to_json_string(j_obj));
+    static uint8_t ctrl_data[CTRL_MAX_DATA_SZ];
+    uint8_t ctrl_data_sz = 0;
+    uint16_t node_addr = 0;
+    uint16_t msg_id = 0;
+    json_object *j_tmp;
 
-    if (json_object_get_type(j_obj)==json_type_array) {
+    if (json_object_object_get_ex(j_obj, "node", &j_tmp)) {
+        node_addr = (uint16_t)json_object_get_int(j_tmp);
+        AFB_NOTICE("node_address: 0x%02X", node_addr);
+    }
+    else {
+        afb_req_fail_f(request, "query-params","param node missing");
+        goto OnErrorExit;
+    }
 
-        int cnt;
-        int len = json_object_array_length(j_obj);
+    if (json_object_object_get_ex(j_obj, "msgid", &j_tmp)) {
+        msg_id = (uint16_t)json_object_get_int(j_tmp);
+        AFB_NOTICE("msgid: 0x%02X", msg_id);
+    }
+    else {
+        afb_req_fail_f(request, "query-params","param msgid missing");
+        goto OnErrorExit;
+    }
 
-        if (len != 1) {
-            afb_req_fail_f(request, "query-array","query of multiple commands is not supported");
-            goto OnErrorExit;
-        }
+    if (json_object_object_get_ex(j_obj, "data", &j_tmp)) {
+        if (json_object_get_type(j_tmp)==json_type_array) {
+            int size = json_object_array_length(j_tmp);
+            if ((size > 0) && (size <= CTRL_MAX_DATA_SZ)) {
+                int32_t i;
+                int32_t val;
+                struct json_object *j_elem;
+
+                for (i = 0; i < size; i++) {
+                    j_elem = json_object_array_get_idx(j_tmp, i);
+                    val = json_object_get_int(j_elem);
+                    if ((val < 0) && (val > 0xFF)){
+                        i = 0;
+                        break;
+                    }
+                    ctrl_data[i] = (uint8_t)json_object_get_int(j_elem);
+                }
 
-        for (cnt = 0; cnt < len; cnt++) {
+                if (i != size) {    /* check if size matches */
+                    afb_req_fail_f(request, "query-params",
+                            "parameter data is ambiguous");
+                    goto OnErrorExit;
+                }
 
-            json_object *j_cmd = json_object_array_get_idx(j_obj, cnt);
-            ucs2_writei2c_cmd(request, j_cmd);
+                ctrl_data_sz = (uint8_t)i;
+            }
         }
     }
+
+    if (UCSI_SendAmsMessage(&ucsContextS->ucsiData,   /* UCSI_Data_t *pPriv*/
+            msg_id,
+            node_addr,
+            &ctrl_data[0],
+            ctrl_data_sz)) {
+        afb_req_success(request, NULL, "sendmessage started successful");
+    }
     else {
-        ucs2_writei2c_cmd(request, j_obj);
+        AFB_NOTICE("sendmessage: scheduling command failed");
+        afb_req_fail_f(request, "query-command-queue","command queue overload");
+        goto OnErrorExit;
     }
 
- OnErrorExit:
+OnErrorExit:
     return;
 }
 
+PUBLIC void ucs2_sendmessage(struct afb_req request) {
+    struct json_object *j_obj;
+
+    j_obj = ucs2_validate_command(request, "sendmessage");
+
+    if (j_obj) {
+        ucs2_sendmessage_cmd(request, j_obj);
+    }
+}
+
 PUBLIC int ucs2_initbinding(void) {
 #ifndef DISABLE_AUTOSTART
     char *filename = GetDefaultConfig();