[9fans] ping suicide: sys: trap: divide error pc=0x00003953c

[ROuNIN]

Hello all,
I would like to learn how to fix this in the ping C code, I am new to
plan9 and C

ip/ping -r -f www.google.com
sending 32 64 bytes messages 0 ms apart  to icmp!www.google.com!1
ping 238: suicide: sys: trap: divide error  pc=0x3953
term% 0: rrt 38841 us, avg rtt 38841 us, ttl = 128

ROuNIN

Re: [9fans] ping suicide: sys: trap: divide error pc=0x00003953c

[erik quanstrom]

since it doesn't make sense to both send packets
as fast as possible and to delay randomly between
packets,  i think this case is just disallowed.

/n/sources/plan9//sys/src/cmd/ip/ping.c:532,537 - ping.c:532,541
break;
} ARGEND;
  
+   if(flood  rint){
+   fprint(2, -f and -r are not compatable\n);
+   usage();
+   }
if(msglen  proto-iphdrsz + ICMP_HDRSIZE)
msglen = proto-iphdrsz + ICMP_HDRSIZE;
if(msglen  64)

and

/n/sources/plan9//sys/man/8/ping:83,89 - ping:83,91
  adds the IP source and destination addresses to each report.
  .TP
  .B f
- send messages as fast as possible (flood).
+ send messages as fast as possible (flood). This flag
+ is not compatable with
+ .BR -r .
  .TP
  .B i
  sets the time between messages
/n/sources/plan9//sys/man/8/ping:104,110 - ping:106,114
  .TP
  .B r
  randomizes the delay with a minimum extra delay of 0 ms and a
- maximum extra delay of the selected interval.
+ maximum extra delay of the selected interval. This flag
+ is not compatable with
+ .BR -f .
  .TP
  .B s
  sets the length of the message to be