From what I know, I thought the applications data it brokens into reasonable size msg and the lower layer. So if I wanted to send a data of 512KB this would be broken into 8 udp packets (if the network can support the maximum 64kb packets).

I have tried changing the socket's snd buffer to upwards of 2MB with setsockopt but still it refuses to send the messages. I need it to be udp and hopefuly stil use sendmsg because of its scatter, gather techniques. I am only using at most 2 args so I am not creating more than IOV_MAX args. Error is shown below as printed from perror.

_pSend (2): Message too long

The only other option I can think of would be to set the buffer to the max data size and recursively send the data. I should also note that I am dealing with asynchronous sockets.


OS INFO:
Fedora 1.