svc: Implement Samsung Service Mode OEM Hook

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>

1 files changed, 241 insertions, 0 deletions

diff --git a/svc.c b/svc.c
new file mode 100644
index 0000000..ae466b9
--- /dev/null
+++ b/svc.c
@@ -0,0 +1,241 @@
+/*
+ * This file is part of Samsung-RIL.
+ *
+ * Copyright (C) 2013 Paul Kocialkowski <contact@paulk.fr>
+ *
+ * Samsung-RIL is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Samsung-RIL is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Samsung-RIL.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define LOG_TAG "RIL-SVC"
+#include <utils/Log.h>
+
+#include "samsung-ril.h"
+#include "util.h"
+
+int ril_oem_hook_svc_session_start(void)
+{
+	if (ril_data.oem_hook_svc_session != NULL) {
+		LOGE("OEM hook SVC session was already started");
+		return -1;
+	}
+
+	ril_data.oem_hook_svc_session = calloc(1, sizeof(struct ril_oem_hook_svc_session));
+
+	return 0;
+}
+
+void ril_oem_hook_svc_session_stop(void)
+{
+	if (ril_data.oem_hook_svc_session == NULL) {
+		LOGE("OEM hook SVC session was already stopped");
+		return;
+	}
+
+	if (ril_data.oem_hook_svc_session->display_screen != NULL)
+		free(ril_data.oem_hook_svc_session->display_screen);
+
+	free(ril_data.oem_hook_svc_session);
+	ril_data.oem_hook_svc_session = NULL;
+}
+
+void ipc_svc_display_screen(struct ipc_message_info *info)
+{
+	char svc_end_message[] = "Samsung-RIL is asking you to End service mode";
+	struct ipc_svc_display_screen_header *header;
+	struct ipc_svc_display_screen_data *data;
+
+	if (info == NULL || info->data == NULL || info->length < sizeof(header->count))
+		return;
+
+	if (ril_data.oem_hook_svc_session == NULL)
+		goto error;
+
+	header = (struct ipc_svc_display_screen_header *) info->data;
+
+	if (header->count == 0) {
+		if (ril_data.oem_hook_svc_session->token != RIL_TOKEN_NULL) {
+			ril_request_complete(ril_data.oem_hook_svc_session->token, RIL_E_SUCCESS, &svc_end_message, sizeof(svc_end_message));
+			ril_data.oem_hook_svc_session->token = RIL_TOKEN_NULL;
+		}
+
+		ril_oem_hook_svc_session_stop();
+
+		return;
+	}
+
+	data = (struct ipc_svc_display_screen_data *) ((unsigned char *) info->data + sizeof(struct ipc_svc_display_screen_header));
+
+	// Invalid responses don't start at index 0
+	if (data->index != 0)
+		return;
+
+	if (ril_data.oem_hook_svc_session->display_screen != NULL) {
+		free(ril_data.oem_hook_svc_session->display_screen);
+		ril_data.oem_hook_svc_session->display_screen = NULL;
+		ril_data.oem_hook_svc_session->display_screen_length = 0;
+	}
+
+	ril_data.oem_hook_svc_session->display_screen_length = header->count * sizeof(struct ipc_svc_display_screen_data);
+	ril_data.oem_hook_svc_session->display_screen = malloc(ril_data.oem_hook_svc_session->display_screen_length);
+	memcpy(ril_data.oem_hook_svc_session->display_screen, data, ril_data.oem_hook_svc_session->display_screen_length);
+
+	if (ril_data.oem_hook_svc_session->token != RIL_TOKEN_NULL) {
+		ril_request_complete(ril_data.oem_hook_svc_session->token, RIL_E_SUCCESS, ril_data.oem_hook_svc_session->display_screen, ril_data.oem_hook_svc_session->display_screen_length);
+
+		ril_data.oem_hook_svc_session->token = RIL_TOKEN_NULL;
+	}
+
+	return;
+
+error:
+	ril_request_complete(ril_request_get_token(info->aseq), RIL_E_GENERIC_FAILURE, NULL, 0);
+}
+
+void ipc_svc_callback(struct ipc_message_info *info)
+{
+	struct ipc_gen_phone_res *phone_res;
+	int rc;
+
+	if (info == NULL || info->data == NULL || info->length < (int) sizeof(struct ipc_gen_phone_res))
+		return;
+
+	if (ril_data.oem_hook_svc_session == NULL)
+		goto error;
+
+	phone_res = (struct ipc_gen_phone_res *) info->data;
+
+	rc = ipc_gen_phone_res_check(phone_res);
+	if (rc < 0)
+		goto error;
+
+	if (ril_data.oem_hook_svc_session->token != RIL_TOKEN_NULL) {
+		LOGE("%s: Another token is waiting", __func__);
+		goto error;
+	}
+
+	ril_data.oem_hook_svc_session->token = ril_request_get_token(info->aseq);
+
+	return;
+
+error:
+	ril_request_complete(ril_request_get_token(info->aseq), RIL_E_GENERIC_FAILURE, NULL, 0);
+}
+
+void ril_request_oem_hook_raw(RIL_Token token, void *data, int length)
+{
+	RIL_OEMHookHeader *header;
+	RIL_OEMHookSvcEnterMode *svc_enter_mode;
+	RIL_OEMHookSvcEndMode *svc_end_mode;
+	RIL_OEMHookSvcKey *svc_key;
+	struct ipc_svc_enter_data svc_enter_data;
+	struct ipc_svc_end_data svc_end_data;
+	struct ipc_svc_pro_keycode_data svc_pro_keycode_data;
+	int svc_length;
+	int rc;
+
+	if (data == NULL || length < (int) sizeof(RIL_OEMHookHeader))
+		goto error;
+
+	header = (RIL_OEMHookHeader *) data;
+
+	// Only SVC is supported
+	if (header->tag != RIL_OEM_HOOK_TAG_SVC)
+		goto error;
+
+	svc_length = (header->length & 0xff) << 8 | (header->length & 0xff00) >> 8;
+
+	switch (header->command) {
+		case RIL_OEM_COMMAND_SVC_ENTER_MODE:
+			if (svc_length < (int) (sizeof(RIL_OEMHookHeader) + sizeof(RIL_OEMHookSvcEnterMode)))
+				goto error;
+
+			svc_enter_mode = (RIL_OEMHookSvcEnterMode *) ((unsigned char *) data + sizeof(RIL_OEMHookHeader));
+
+			if (svc_enter_mode->query) {
+				if (ril_data.oem_hook_svc_session == NULL)
+					goto error;
+
+				if (ril_data.oem_hook_svc_session->display_screen != NULL && ril_data.oem_hook_svc_session->display_screen_length > 0)
+					ril_request_complete(token, RIL_E_SUCCESS, ril_data.oem_hook_svc_session->display_screen, ril_data.oem_hook_svc_session->display_screen_length);
+				else
+					goto error;
+			} else {
+				rc = ril_oem_hook_svc_session_start();
+				if (rc < 0) {
+					LOGE("%s: Unable to start OEM hook SVC session", __func__);
+					goto error;
+				}
+
+				memset(&svc_enter_data, 0, sizeof(svc_enter_data));
+				svc_enter_data.mode = svc_enter_mode->mode;
+				svc_enter_data.type = svc_enter_mode->type;
+
+				if (svc_enter_data.mode == IPC_SVC_MODE_MONITOR)
+					svc_enter_data.unknown = 0x00;
+				else
+					svc_enter_data.unknown = 0x10;
+
+				ipc_gen_phone_res_expect_to_func(ril_request_get_id(token), IPC_SVC_ENTER, ipc_svc_callback);
+
+				ipc_fmt_send(IPC_SVC_ENTER, IPC_TYPE_SET, (unsigned char *) &svc_enter_data, sizeof(svc_enter_data), ril_request_get_id(token));
+			}
+			break;
+		case RIL_OEM_COMMAND_SVC_END_MODE:
+			if (svc_length < (int) (sizeof(RIL_OEMHookHeader) + sizeof(RIL_OEMHookSvcEndMode)))
+				goto error;
+
+			svc_end_mode = (RIL_OEMHookSvcEndMode *) ((unsigned char *) data + sizeof(RIL_OEMHookHeader));
+
+			ril_oem_hook_svc_session_stop();
+
+			memset(&svc_end_data, 0, sizeof(svc_end_data));
+			svc_end_data.mode = svc_end_mode->mode;
+
+			ipc_gen_phone_res_expect_to_complete(ril_request_get_id(token), IPC_SVC_END);
+
+			ipc_fmt_send(IPC_SVC_END, IPC_TYPE_SET, (unsigned char *) &svc_end_data, sizeof(svc_end_data), ril_request_get_id(token));
+			break;
+		case RIL_OEM_COMMAND_SVC_KEY:
+			if (svc_length < (int) (sizeof(RIL_OEMHookHeader) + sizeof(RIL_OEMHookSvcKey)))
+				goto error;
+
+			svc_key = (RIL_OEMHookSvcKey *) ((unsigned char *) data + sizeof(RIL_OEMHookHeader));
+
+			if (svc_key->query) {
+				if (ril_data.oem_hook_svc_session == NULL)
+					goto error;
+
+				if (ril_data.oem_hook_svc_session->display_screen != NULL && ril_data.oem_hook_svc_session->display_screen_length > 0)
+					ril_request_complete(token, RIL_E_SUCCESS, ril_data.oem_hook_svc_session->display_screen, ril_data.oem_hook_svc_session->display_screen_length);
+				else
+					goto error;
+			} else {
+				if (ril_data.oem_hook_svc_session == NULL)
+					goto error;
+
+				memset(&svc_pro_keycode_data, 0, sizeof(svc_pro_keycode_data));
+				svc_pro_keycode_data.key = svc_key->key;
+
+				ipc_gen_phone_res_expect_to_func(ril_request_get_id(token), IPC_SVC_PRO_KEYCODE, ipc_svc_callback);
+
+				ipc_fmt_send(IPC_SVC_PRO_KEYCODE, IPC_TYPE_SET, (unsigned char *) &svc_pro_keycode_data, sizeof(svc_pro_keycode_data), ril_request_get_id(token));
+			}
+			break;
+	}
+
+	return;
+
+error:
+	ril_request_complete(token, RIL_E_GENERIC_FAILURE, NULL, 0);
+}