Simplify get_cw() protocol call.

Handle errors in generic camd code instead of protocol code.

camd-cs378x.c

@@ -135,11 +135,8 @@ static int cs378x_get_cw(struct camd *c, uint16_t *ca_id, uint16_t *idx, uint8_t
 
 READ:
 	ret = cs378x_recv(c, data, &data_len);
-	if (ret < 0) {
-		ts_LOGf("ERR | No code word has been received (ret = %d)\n", ret);
-		cs378x_reconnect(c);
-		return ret;
-	}
+	if (ret < 0) // Fatal error
+		return -1;
 
 	// EMM request, ignore it. Sometimes OSCAM sends two EMM requests after CW
 	if (data[0] == 0x05)
@@ -150,12 +147,6 @@ READ:
 			data[0],
 			data[0] == 0x08 ? "No card" :
 			data[0] == 0x44 ? "No code word found" : "Unknown err");
-		c->ecm_recv_errors++;
-		usleep(10000);
-		if (c->ecm_recv_errors >= ECM_RECV_ERRORS_LIMIT) {
-			c->key->is_valid_cw = 0;
-			memset(cw, 0, 16); // Invalid CW
-		}
 		return 0;
 	}
 
@@ -173,7 +164,7 @@ READ:
 	*idx   = (data[16] << 8) | data[17];
 	memcpy(cw, data + 20, 16);
 
-	return ret;
+	return 1;
 }
 
 void camd_proto_cs378x(struct camd_ops *ops) {

camd.c

@@ -70,10 +70,22 @@ static int camd_recv_cw(struct ts *ts) {
 
 	gettimeofday(&tv1, NULL);
 	ret = c->ops.get_cw(c, &ca_id, &idx, c->key->cw);
-	if (ret <= 0)
-		return ret;
 	gettimeofday(&tv2, NULL);
 
+	if (ret <= 0) {
+		if (ret == -1) { // Fatal error it is better to reconnect to server.
+			ts_LOGf("ERR | No code word has been received (ret = %d)\n", ret);
+			c->ops.reconnect(c);
+		}
+		c->ecm_recv_errors++;
+		if (c->ecm_recv_errors >= ECM_RECV_ERRORS_LIMIT) {
+			c->key->is_valid_cw = 0;
+			memset(c->key->cw, 0, 16); // Invalid CW
+		}
+		usleep(10000);
+		return 0;
+	}
+
 	char cw_dump[16 * 6];
 	ts_hex_dump_buf(cw_dump, 16 * 6, c->key->cw, 16, 0);
 
@@ -110,7 +122,7 @@ static int camd_recv_cw(struct ts *ts) {
 			idx, cw_dump );
 	}
 
-	return ret;
+	return 1;
 }
 
 #undef ERR
@@ -126,7 +138,7 @@ static int camd_send_ecm(struct ts *ts, struct camd_msg *msg) {
 	}
 
 	ret = camd_recv_cw(ts);
-	if (ret < 48) {
+	if (ret < 1) {
 		ts->is_cw_error = 1;
 		if (ts->key.ts && time(NULL) - ts->key.ts > KEY_VALID_TIME) {
 			if (c->key->is_valid_cw)