Re: gettimeofday() in hping

Greetings,

Kris Kennaway wrote:
> 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.
Will something like this do the trick?

void socket_sndbuf(int sd)
{
        long int bufsize;
        bufsize = 65536;
        if (setsockopt(sd, SOL_SOCKET, SO_SNDBUF,
                        (char *)&bufsize, sizeof(int)) == -1)
        {
                printf("[socket_sndbuf] can't set SO_SNDBUF option\n");
        }
}

I'm not a C developer so pardon me if I made something stupid :)
Also how can I make bufsize = default settings*2 for example?

I tried this code and here is what ktrace show now:
 65372 hping3   CALL  socket(PF_INET,SOCK_DGRAM,IPPROTO_IP)
 65372 hping3   RET   socket 3
 65372 hping3   CALL  setsockopt(0x3,SOL_SOCKET,SO_BROADCAST,0xbfbfe844,0x4)
 65372 hping3   RET   setsockopt 0
 65372 hping3   CALL  connect(0x3,0x8067e20,0x10)
 65372 hping3   RET   connect 0
 65372 hping3   CALL  getsockname(0x3,0xbfbfe834,0xbfbfe848)
 65372 hping3   RET   getsockname 0
 65372 hping3   CALL  close(0x3)
 65372 hping3   RET   close 0
 65372 hping3   CALL  socket(PF_INET,SOCK_RAW,IPPROTO_RAW)
 65372 hping3   RET   socket 3
 65372 hping3   CALL  setsockopt(0x3,SOL_SOCKET,SO_BROADCAST,0xbfbfe8d4,0x4)
 65372 hping3   RET   setsockopt 0
 65372 hping3   CALL  setsockopt(0x3,0,0x2,0xbfbfe8d4,0x4)
 65372 hping3   RET   setsockopt 0
 65372 hping3   CALL  setsockopt(0x3,SOL_SOCKET,SO_SNDBUF,0xbfbfe8d4,0x4)
 65372 hping3   RET   setsockopt 0

>
> Kris
> _______________________________________________
> [e-mail] mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> To unsubscribe, send any mail to 
> "[e-mail]"

-- 

Best Wishes,
Stefan Lambrev
ICQ# 24134177

_______________________________________________
[e-mail] mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
To unsubscribe, send any mail to "[e-mail]"