service
define string as "ln/string"

request
# name of file to open for reading
char* filename

# optional list of name-patterns to filter for
# if not given, replay all topcs/services
string* patterns

# start replay at given time into the log
# a value of 0 results in replay from beginning of file
double start_time

# stop replay at given time into the log
# a value of 0 results in replay until end of file
double stop_time

# deprecated, has no use
uint8_t no_skip 

# whether to delay response of this service call until
# replay has finished.
uint8_t wait

response
char* error_message
