=> R0 = Socket descriptor
R1 = Pointer to message descriptor
R2 = Flags
<= R0 = Amount of data sent
This SWI is deprecated, see Socket_Sendmsg_1 for its replacement.
This call behaves in the same way as Socket_Sendto or sendto(), except that the message descriptor is used to indicate where the address should be taken from and to give a list of buffers containing the data in.
