1Using BPF: 2 3(1) AIX 4.x's version of BPF is undocumented and somewhat unstandard; the 4 current BPF support code includes changes that should work around 5 that; it appears to compile and work on at least one AIX 4.3.3 6 machine. 7 8 Note that the BPF driver and the "/dev/bpf" devices might not exist 9 on your machine; AIX's tcpdump loads the driver and creates the 10 devices if they don't already exist. Our libpcap should do the 11 same, and the configure script should detect that it's on an AIX 12 system and choose BPF even if the devices aren't there. 13 14 Also note that tcpdump _binary_ compiled on AIX 4 may have a problem 15 doing the initial loading of the BPF driver if copied to AIX 5 and 16 run there (GH #52). tcpdump binary natively compiled on AIX 5 should 17 not have this issue. 18 19(2) If libpcap doesn't compile on your machine when configured to use 20 BPF, or if the workarounds fail to make it work correctly, you 21 should send to tcpdump-workers@lists.tcpdump.org a detailed bug 22 report (if the compile fails, send us the compile error messages; 23 if it compiles but fails to work correctly, send us as detailed as 24 possible a description of the symptoms, including indications of the 25 network link-layer type being wrong or time stamps being wrong). 26 27 If you fix the problems yourself, please submit a patch by forking 28 the branch at 29 30 https://github.com/the-tcpdump-group/libpcap/issues 31 32 and issuing a pull request, so we can incorporate the fixes into the 33 next release. 34 35 If you don't fix the problems yourself, you can, as a workaround, 36 make libpcap use DLPI instead of BPF. 37 38 This can be done by specifying the flag: 39 40 --with-pcap=dlpi 41 42 to the "configure" script for libpcap. 43 44If you use DLPI: 45 46(1) It is a good idea to have the latest version of the DLPI driver on 47 your system, since certain versions may be buggy and cause your AIX 48 system to crash. DLPI is included in the fileset bos.rte.tty. I 49 found that the DLPI driver that came with AIX 4.3.2 was buggy, and 50 had to upgrade to bos.rte.tty 4.3.2.4: 51 52 lslpp -l bos.rte.tty 53 54 bos.rte.tty 4.3.2.4 COMMITTED Base TTY Support and Commands 55 56 Updates for AIX filesets can be obtained from: 57 ftp://service.software.ibm.com/aix/fixes/ 58 59 These updates can be installed with the smit program. 60 61(2) After compiling libpcap, you need to make sure that the DLPI driver 62 is loaded. Type: 63 64 strload -q -d dlpi 65 66 If the result is: 67 68 dlpi: yes 69 70 then the DLPI driver is loaded correctly. 71 72 If it is: 73 74 dlpi: no 75 76 Then you need to type: 77 78 strload -f /etc/dlpi.conf 79 80 Check again with strload -q -d dlpi that the dlpi driver is loaded. 81 82 Alternatively, you can uncomment the lines for DLPI in 83 /etc/pse.conf and reboot the machine; this way DLPI will always 84 be loaded when you boot your system. 85 86(3) There appears to be a problem in the DLPI code in some versions of 87 AIX, causing a warning about DL_PROMISC_MULTI failing; this might 88 be responsible for DLPI not being able to capture outgoing packets. 89