diff options
Diffstat (limited to 'eperd/ping.c')
| -rw-r--r-- | eperd/ping.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/eperd/ping.c b/eperd/ping.c index 8d0866d..8f7f4e0 100644 --- a/eperd/ping.c +++ b/eperd/ping.c @@ -475,7 +475,9 @@ static void fmticmp4(u_char *buffer, size_t *sizep, u_int8_t seq, /* The ICMP header (no checksum here until user data has been filled in) */ icmp->icmp_type = ICMP_ECHO; /* type of message */ icmp->icmp_code = 0; /* type sub code */ - icmp->icmp_id = 0xffff & pid; /* unique process identifier */ + + /* Keep the high nibble clear for traceroute */ + icmp->icmp_id = 0x0fff & pid; /* unique process identifier */ icmp->icmp_seq = htons(seq); /* message identifier */ /* User data */ |