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Diffstat (limited to 'networking/ping.c')
-rw-r--r--networking/ping.c47
1 files changed, 25 insertions, 22 deletions
diff --git a/networking/ping.c b/networking/ping.c
index 12730bec5..d8a70334d 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -1,13 +1,15 @@
/* vi: set sw=4 ts=4: */
/*
- * $Id: ping.c,v 1.56 2004/03/15 08:28:48 andersen Exp $
* Mini ping implementation for busybox
*
* Copyright (C) 1999 by Randolph Chung <tausq@debian.org>
*
* Adapted from the ping in netkit-base 0.10:
* Copyright (c) 1989 The Regents of the University of California.
- * Derived from software contributed to Berkeley by Mike Muuss.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Mike Muuss.
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
@@ -74,7 +76,7 @@ static void ping(const char *host)
pingsock = create_icmp_socket();
- memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+ memset(&pingaddr, 0, sizeof(pingaddr));
pingaddr.sin_family = AF_INET;
h = xgethostbyname(host);
@@ -202,7 +204,7 @@ static void sendping(int junk)
pkt->icmp_cksum = 0;
pkt->icmp_seq = htons(ntransmitted); /* don't ++ here, it can be a macro */
pkt->icmp_id = myid;
- CLR(ntohs(pkt->icmp_seq) % MAX_DUP_CHK);
+ CLR((uint16_t)ntransmitted % MAX_DUP_CHK);
ntransmitted++;
gettimeofday((struct timeval *) &pkt->icmp_dun, NULL);
@@ -230,20 +232,20 @@ static void sendping(int junk)
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";
+ 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";
}
}
@@ -270,7 +272,7 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from)
return; /* not our ping */
if (icmppkt->icmp_type == ICMP_ECHOREPLY) {
- u_int16_t recv_seq = ntohs(icmppkt->icmp_seq);
+ uint16_t recv_seq = ntohs(icmppkt->icmp_seq);
++nreceived;
tp = (struct timeval *) icmppkt->icmp_data;
@@ -307,11 +309,12 @@ static void unpack(char *buf, int sz, struct sockaddr_in *from)
if (dupflag)
printf(" (DUP!)");
puts("");
- } else
+ } else {
if (icmppkt->icmp_type != ICMP_ECHO)
bb_error_msg("warning: got ICMP %d (%s)",
icmppkt->icmp_type,
icmp_type_name(icmppkt->icmp_type));
+ }
fflush(stdout);
}
@@ -326,7 +329,7 @@ static void ping(const char *host)
xbind(pingsock, (struct sockaddr*)&sourceaddr, sizeof(sourceaddr));
}
- memset(&pingaddr, 0, sizeof(struct sockaddr_in));
+ memset(&pingaddr, 0, sizeof(pingaddr));
pingaddr.sin_family = AF_INET;
hostent = xgethostbyname(host);
@@ -339,7 +342,7 @@ static void ping(const char *host)
setsockopt_broadcast(pingsock);
/* set recv buf for broadcast pings */
- sockopt = 48 * 1024;
+ sockopt = 48 * 1024; /* explain why 48k? */
setsockopt(pingsock, SOL_SOCKET, SO_RCVBUF, (char *) &sockopt,
sizeof(sockopt));