single packet capture time w/pcap vs. recvfrom()

["Brandon Stafford" <brandon () mindtribe com>]

Hello,

    I'm writing a server that captures UDP packets and, after some manipulation, sends the data out the serial port. 
Right now, I'm using recvfrom(), but it takes 20 ms to execute for each packet captured. I know that tcpdump can 
capture packets much faster than 20 ms/packet on the same computer, so I know recvfrom() is running into trouble, 
probably because of bad checksums on the packets.

    Is it a good idea to rewrite the server using pcap, or is this likely to slow me down even more?

Thanks,
Brandon


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