iftop-users May 2004

iftop-users@lists.beasts.org

4 participants
3 discussions

small but anoying bug in iftop-0.16
by richard lucassen 29 May '04

29 May '04

Seen on a RedHat-7.3 and a Debian-Woody system: When running iftop-0.16, you can press "o" (letter o) to freeze the order. From that moment, the "total" column is counting much more than it should. Also the displayed bandwidth in the other columns is incorrect. I hope you can reproduce it, if not I can give you access to one of the machines. Richard. /root/.iftoprc: interface: eth0 dns-resolution: no port-resolution: no filter-code: not udp port 53 show-bars: yes promiscuous: yes port-display: on hide-source: no hide-destination: no use-bytes: no #sort: 2s #sort: 10s sort: 40s #sort: source #sort: destination line-display: one-line-both #line-display: two-line #line-display: one-line-sent #line-display: one-line-received show-totals: yes log-scale: no max-bandwidth: 2048k #net-filter: net/mask #screen-filter: regexp -- ___________________________________________________________________ Recursion: see recursion +------------------------------------------------------------------+ | Richard Lucassen, Utrecht | | Public key and email address: | | http://www.lucassen.org/mail-pubkey.html | +------------------------------------------------------------------+

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iftop 0.16 on HP-UX
by John Caywood 05 May '04

05 May '04

Had to make these changes to compile under HP-UX 11.00 1. in edline.c KEY_END is undefined anywhere comment out this case 2. in options.c u_int32_t is uint32_t in HP-UX (sys/types.h) struct if_nameindex is struct ifnet in HP-UX (net/if.h) 3. in resolver.c wait() requires an argument of type int * changed wait() to wait( (int *) (pid_t) -1) 4. in ui.c before #include <curses.h> add #define _XOPEN_SOURCE_EXTENDED 5. in addrs_dlpi.c add #include <netdb.h> Got through the compile phase with these changes, but at load time, 'ld' choked when trying to find if_freenameindex() and if_nameindex() Can anyone suggest where I might find these functions? Or is the port hopeless because different data structures are being used for kernel if structures? ===== John Caywood biliary two thousand at yahoo dot calm __________________________________ Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs http://hotjobs.sweepstakes.yahoo.com/careermakeover

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measuring bandwith ?
by raptor 03 May '04

03 May '04

hi, I'm tring to use libpcap to measure bandwith.. the reason I need this is to launch this small program that will measure the bandwith usage (tcpdump filter based).. it will not be ncurses based,, My problem is how to set this program to capture the traffic for 10 seconds for example ... and most importanly how u calculate that 1 second is passed, so that u calc "kbps"... Could u explain...(i'm not a C programmer but have idea what is all about) Second question I've used pcap sniffer.c example from tcpdump.org, and modified so that i calculate the packet sizes in two different ways i.e : total_len2 += ntohs(ip->ip_len); total_len += header->len; into got_packet() callback function... I see that iftop uses the first one, is it more correct... tia.. PS. One second question is what if I put several filters in text files and loop over them i.e. read the first filter, setfilter(), mesure for 10 sec, then read the second filter...etc.etc.. will there be some calculation error 'cause I'm switching filters i.e. will I have to wait some time before start measuting say : 1. setfilter() 2. wait 1 sec 3. measure 10 sec 4. goto 1

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iftop-users May 2004