From: Roy Marples <roy@marples.name>
Date: Mon, 20 Jan 2014 16:16:54 +0000 (+0000)
Subject: Fix payload address calculation.
X-Git-Tag: v6.3.0~100
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a8624f0da19e40bc39393b50db104ddc13149b6e;p=thirdparty%2Fdhcpcd.git

Fix payload address calculation.
Thanks to Sebastian Huber.
---

diff --git a/bpf.c b/bpf.c
index 67fd5056..59d17d92 100644
--- a/bpf.c
+++ b/bpf.c
@@ -197,7 +197,8 @@ ipv4_getrawpacket(struct interface *ifp, int protocol,
 		if (state->buffer_pos + packet.bh_caplen + packet.bh_hdrlen >
 		    state->buffer_len)
 			goto next; /* Packet beyond buffer, drop. */
-		payload = state->buffer + packet.bh_hdrlen + ETHER_HDR_LEN;
+		payload = state->buffer + state->buffer_pos +
+		    packet.bh_hdrlen + ETHER_HDR_LEN;
 		bytes = packet.bh_caplen - ETHER_HDR_LEN;
 		if (bytes > len)
 			bytes = len;