mirror of https://github.com/hak5/openwrt-owl.git
43 lines
1.2 KiB
Diff
43 lines
1.2 KiB
Diff
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--- busybox-1.4.1/networking/ping.c 2007-01-24 22:34:34.000000000 +0100
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+++ busybox-1.4.1.new/networking/ping.c 2007-02-28 20:35:59.000000000 +0100
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@@ -70,7 +70,7 @@
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struct sockaddr_in pingaddr;
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struct icmp *pkt;
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int pingsock, c;
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- char packet[DEFDATALEN + MAXIPLEN + MAXICMPLEN];
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+ char packet[datalen + MAXIPLEN + MAXICMPLEN];
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pingsock = create_icmp_socket();
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@@ -86,7 +86,7 @@
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pkt->icmp_type = ICMP_ECHO;
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pkt->icmp_cksum = in_cksum((unsigned short *) pkt, sizeof(packet));
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- c = sendto(pingsock, packet, DEFDATALEN + ICMP_MINLEN, 0,
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+ c = sendto(pingsock, packet, datalen + ICMP_MINLEN, 0,
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(struct sockaddr *) &pingaddr, sizeof(struct sockaddr_in));
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if (c < 0) {
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@@ -257,8 +257,8 @@
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gettimeofday(&tv, NULL);
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- /* discard if too short */
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- if (sz < (datalen + ICMP_MINLEN))
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+ /* discard if too short / long */
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+ if (sz < (datalen + ICMP_MINLEN) || sz > (MAXICMPLEN))
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return;
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/* check IP header */
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@@ -274,6 +274,10 @@
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++nreceived;
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tp = (struct timeval *) icmppkt->icmp_data;
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+ /* If packet is too short, results will be truncated */
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+ if (sz < (ICMP_MINLEN + sizeof(tv.tv_sec) + sizeof(tv.tv_usec)))
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+ return;
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+
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if ((tv.tv_usec -= tp->tv_usec) < 0) {
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--tv.tv_sec;
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tv.tv_usec += 1000000;
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