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Date: Thu, 24 Jan 2008 12:00:46 +0100
From: Kris Kennaway <kris@FreeBSD.org>
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To: Stefan Lambrev <stefan.lambrev@moneybookers.com>
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Cc: freebsd-hackers@freebsd.org, Ivan Voras <ivoras@freebsd.org>
Subject: Re: gettimeofday() in hping
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Stefan Lambrev wrote:

>> It is the socket buffer that is filling up.  Either the application is 
>> not increasing it to large enough size or the default maximum is too 
>> low (Linux may set a larger default).  Try increasing 
>> kern.ipc.maxsockbuf and confirming with the source and/or ktrace that 
>> it is doing the right setsockopt() call.
> Increasing kern.ipc.maxsockbuf doesn't help.
> 
> Actually this is the code that failed and print this error:
> 
>        result = sendto(sockraw, packet, packetsize, 0,
>                (struct sockaddr*)&remote, sizeof(remote));
> 
>        if (result == -1 && errno != EINTR && !opt_rand_dest && 
> !opt_rand_source) {
>                perror("[send_ip] sendto");
> 
> Those are the only references for setsockopt when ktracing:
> 3385 hping    CALL  __sysctl(0xbfbfe870,0x6,0,0xbfbfe888,0,0)
>  3385 hping    RET   __sysctl 0
>  3385 hping    CALL  __sysctl(0xbfbfe870,0x6,0x28305180,0xbfbfe888,0,0)
>  3385 hping    RET   __sysctl 0
>  3385 hping    CALL  socket(PF_INET,SOCK_DGRAM,IPPROTO_IP)
>  3385 hping    RET   socket 3
>  3385 hping    CALL  setsockopt(0x3,SOL_SOCKET,SO_BROADCAST,0xbfbfe884,0x4)
>  3385 hping    RET   setsockopt 0
>  3385 hping    CALL  connect(0x3,0x8067da0,0x10)
>  3385 hping    RET   connect 0
>  3385 hping    CALL  getsockname(0x3,0xbfbfe874,0xbfbfe888)
>  3385 hping    RET   getsockname 0
>  3385 hping    CALL  close(0x3)
>  3385 hping    RET   close 0
>  3385 hping    CALL  socket(PF_INET,SOCK_RAW,IPPROTO_RAW)
>  3385 hping    RET   socket 3
>  3385 hping    CALL  setsockopt(0x3,SOL_SOCKET,SO_BROADCAST,0xbfbfe914,0x4)
>  3385 hping    RET   setsockopt 0
>  3385 hping    CALL  setsockopt(0x3,0,0x2,0xbfbfe914,0x4)
>  3385 hping    RET   setsockopt 0
>  3385 hping    CALL  open(0xbfbfe8a4,O_RDWR,<unused>0)
>  3385 hping    NAMI  "/dev/bpf0"
>  3385 hping    RET   open -1 errno 16 Device busy
>  3385 hping    CALL  open(0xbfbfe8a4,O_RDWR,<unused>0)
>  3385 hping    NAMI  "/dev/bpf1"
>  3385 hping    RET   open 4

OK, try adding the setsockopt(...SO_SNDBUF...) call.

Kris