diff options
Diffstat (limited to 'ping.c')
| -rw-r--r-- | ping.c | 38 |
1 files changed, 30 insertions, 8 deletions
@@ -1,6 +1,6 @@ /* vi: set sw=4 ts=4: */ /* - * $Id: ping.c,v 1.13 2000/04/21 01:26:49 erik Exp $ + * $Id: ping.c,v 1.14 2000/04/25 23:24:55 erik Exp $ * Mini ping implementation for busybox * * Copyright (C) 1999 by Randolph Chung <tausq@debian.org> @@ -262,6 +262,26 @@ static void sendping(int ign) } } +static char *icmp_type_name (int id) +{ + switch (id) { + case ICMP_ECHOREPLY: return "Echo Reply"; + case ICMP_DEST_UNREACH: return "Destination Unreachable"; + case ICMP_SOURCE_QUENCH: return "Source Quench"; + case ICMP_REDIRECT: return "Redirect (change route)"; + case ICMP_ECHO: return "Echo Request"; + case ICMP_TIME_EXCEEDED: return "Time Exceeded"; + case ICMP_PARAMETERPROB: return "Parameter Problem"; + case ICMP_TIMESTAMP: return "Timestamp Request"; + case ICMP_TIMESTAMPREPLY: return "Timestamp Reply"; + case ICMP_INFO_REQUEST: return "Information Request"; + case ICMP_INFO_REPLY: return "Information Reply"; + case ICMP_ADDRESS: return "Address Mask Request"; + case ICMP_ADDRESSREPLY: return "Address Mask Reply"; + default: return "unknown ICMP type"; + } +} + static void unpack(char *buf, int sz, struct sockaddr_in *from) { struct icmp *icmppkt; @@ -282,10 +302,11 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from) sz -= hlen; icmppkt = (struct icmp *) (buf + hlen); + if (icmppkt->icmp_id != myid) + return; /* not our ping */ + if (icmppkt->icmp_type == ICMP_ECHOREPLY) { - if (icmppkt->icmp_id != myid) - return; /* not our ping */ - ++nreceived; + ++nreceived; tp = (struct timeval *) icmppkt->icmp_data; if ((tv.tv_usec -= tp->tv_usec) < 0) { @@ -321,10 +342,11 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from) if (dupflag) printf(" (DUP!)"); printf("\n"); - } else { - fprintf(stderr, - "Warning: unknown ICMP packet received (not echo-reply)\n"); - } + } else + if (icmppkt->icmp_type != ICMP_ECHO) + fprintf(stderr, + "Warning: Got ICMP %d (%s)\n", + icmppkt->icmp_type, icmp_type_name (icmppkt->icmp_type)); } static void ping(char *host) |