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Fix crash when receiving unregistered remotes

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This commit is contained in:
Fred Sundvik 2016-03-12 19:41:34 +02:00
parent 11bd4ba0dd
commit 32f0171d39
1 changed files with 17 additions and 15 deletions
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32
serial_link/protocol/transport.c
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@ -71,22 +71,24 @@ void add_remote_objects(remote_object_t** _remote_objects, uint32_t _num_remote_
void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) { void transport_recv_frame(uint8_t from, uint8_t* data, uint16_t size) {
uint8_t id = data[size-1]; uint8_t id = data[size-1];
remote_object_t* obj = remote_objects[id]; if (id < num_remote_objects) {
uint8_t* start; remote_object_t* obj = remote_objects[id];
if (obj->object_type == MASTER_TO_ALL_SLAVES) { uint8_t* start;
start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size); if (obj->object_type == MASTER_TO_ALL_SLAVES) {
start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
}
else if(obj->object_type == SLAVE_TO_MASTER) {
start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
start += (from - 1) * REMOTE_OBJECT_SIZE(obj->object_size);
}
else {
start = obj->buffer + NUM_SLAVES * LOCAL_OBJECT_SIZE(obj->object_size);
}
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
void* ptr = triple_buffer_begin_write_internal(obj->object_size, tb);
memcpy(ptr, data, size -1);
triple_buffer_end_write_internal(tb);
} }
else if(obj->object_type == SLAVE_TO_MASTER) {
start = obj->buffer + LOCAL_OBJECT_SIZE(obj->object_size);
start += (from - 1) * REMOTE_OBJECT_SIZE(obj->object_size);
}
else {
start = obj->buffer + NUM_SLAVES * LOCAL_OBJECT_SIZE(obj->object_size);
}
triple_buffer_object_t* tb = (triple_buffer_object_t*)start;
void* ptr = triple_buffer_begin_write_internal(obj->object_size, tb);
memcpy(ptr, data, size -1);
triple_buffer_end_write_internal(tb);
} }
void update_transport(void) { void update_transport(void) {