Re: mss and obsd

2016-08-02 Thread Peter J. Philipp
Hi, The maximum payload in ping.c (all source has been run through cat -n) is: 92 #define MAXPAYLOAD (IP_MAXPACKET - MAXIPLEN - 8) /* max ICMP payload size */ which consists of: 90 #define MAXIPLEN60 This is the maximum IP len since the value is leftshifted by 2 and cons

Re: mss and obsd

2016-08-02 Thread Christian Weisgerber
On 2016-08-02, Friedrich Locke wrote: > sioux@etosha$ ping -s 65468 gustav.cpd.ufv.br > ping: packet size is too large: 65468 > sioux@etosha$ > > I realize the difference between 65535 and 65467 is 68 bytes. What is obsd > accounting for ? Maximum IP packet size: 65535 Maximum IP header size:

mss and obsd

2016-08-02 Thread Friedrich Locke
Hi folks, i am pinging my desktop from a obsd machine and i am very curious about the size of packet an sending. Here you have it: sioux@etosha$ ping -s 65467 gustav.cpd.ufv.br PING gustav.cpd.ufv.br (200.235.177.58): 65467 data bytes 65475 bytes from 200.235.177.58: icmp_seq=0 ttl=63 time=12.241