mirror of
https://git.openwrt.org/openwrt/openwrt.git
synced 2024-11-20 15:45:21 +01:00
43 lines
1.2 KiB
Diff
43 lines
1.2 KiB
Diff
--- busybox-1.4.1/networking/ping.c 2007-01-24 22:34:34.000000000 +0100
|
|
+++ busybox-1.4.1.new/networking/ping.c 2007-02-28 20:35:59.000000000 +0100
|
|
@@ -70,7 +70,7 @@
|
|
struct sockaddr_in pingaddr;
|
|
struct icmp *pkt;
|
|
int pingsock, c;
|
|
- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
|
|
+ char packet[datalen + MAXIPLEN + MAXICMPLEN];
|
|
|
|
pingsock = create_icmp_socket();
|
|
|
|
@@ -86,7 +86,7 @@
|
|
pkt->icmp_type = ICMP_ECHO;
|
|
pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
|
|
|
|
- c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0,
|
|
+ c = sendto(pingsock, packet, datalen + ICMP_MINLEN, 0,
|
|
(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
|
|
|
|
if (c < 0) {
|
|
@@ -257,8 +257,8 @@
|
|
|
|
gettimeofday(&tv, NULL);
|
|
|
|
- /* discard if too short */
|
|
- if (sz < (datalen + ICMP_MINLEN))
|
|
+ /* discard if too short / long */
|
|
+ if (sz < (datalen + ICMP_MINLEN) || sz > (MAXICMPLEN))
|
|
return;
|
|
|
|
/* check IP header */
|
|
@@ -274,6 +274,10 @@
|
|
++nreceived;
|
|
tp = (struct timeval *) icmppkt->icmp_data;
|
|
|
|
+ /* If packet is too short, results will be truncated */
|
|
+ if (sz < (ICMP_MINLEN + sizeof(tv.tv_sec) + sizeof(tv.tv_usec)))
|
|
+ return;
|
|
+
|
|
if ((tv.tv_usec -= tp->tv_usec) < 0) {
|
|
--tv.tv_sec;
|
|
tv.tv_usec += 1000000;
|