Consider the following: ifconfig em0 inet 1.2.3.4/24 ping 1.2.3.4 Then a tcpdump on lo0 shows: 21:15:56.641571 IP 127.0.0.1 > 1.2.3.4: ICMP echo request, id 36105, seq 10, length 64 21:15:56.641582 IP 1.2.3.4 > 127.0.0.1: ICMP echo reply, id 36105, seq 10, length 64
I think that the address used should have been 1.2.3.4 and not 127.0.0.1. Now when I do a telnet 1.2.3.4 22, I see: 21:17:55.955475 IP 1.2.3.4.38534 > 1.2.3.4.22: Flags [S], seq 904951907, win 65535, options [mss 16344,nop,wscale 3,sackOK,TS val 1850412 ecr 0], length 0 21:17:55.955487 IP 1.2.3.4.22 > 1.2.3.4.38534: Flags [R.], seq 0, ack 904951908, win 0, length 0 So in this case we actually do use 1.2.3.4! This is on a 8.1 system. A 8.2 system shows the same behaviour and a 7.4 system behaves correctly (i.e.: uses the same address for icmp as for tcp). I tried to investigate the souce code, but my knwoledge about it is a bit rusty :-( -Guido NB: perhaps related: When I do the ping in a vimage on a different VIMAGE-kernel, the ping fails because the source address is never filled in (i.e. is 0.0.0.0) _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
