VirtualBox

Ticket #3465: diff_vboxnetflt

File diff_vboxnetflt, 1.5 KB (added by Frank Mehnert, 15 years ago)

vboxnetflt patch for Linux kernels <= 2.6.18

Line 
1--- linux/VBoxNetFlt-linux.c
2+++ linux/VBoxNetFlt-linux.c
3@@ -27,6 +27,7 @@
4 #include <linux/netdevice.h>
5 #include <linux/etherdevice.h>
6 #include <linux/rtnetlink.h>
7+#include <linux/ip.h>
8
9 #define LOG_GROUP LOG_GROUP_NET_FLT_DRV
10 #include <VBox/log.h>
11@@ -774,12 +775,29 @@
12 else
13 {
14 if (pBuf->ip_summed == CHECKSUM_PARTIAL && pBuf->pkt_type == PACKET_OUTGOING)
15+ {
16+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
17+ /*
18+ * Try to work around the problem with CentOS 4.7 and 5.2 (2.6.9
19+ * and 2.6.18 kernels), they pass wrong 'h' pointer down. We take IP
20+ * header length from the header itself and reconstruct 'h' pointer
21+ * to TCP (or whatever) header.
22+ */
23+ unsigned char *tmp = pBuf->h.raw;
24+ if (pBuf->h.raw == pBuf->nh.raw && pBuf->protocol == htons(ETH_P_IP))
25+ pBuf->h.raw = pBuf->nh.raw + pBuf->nh.iph->ihl * 4;
26+#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) */
27 if (VBOX_SKB_CHECKSUM_HELP(pBuf))
28 {
29 LogRel(("VBoxNetFlt: Failed to compute checksum, dropping the packet.\n"));
30 dev_kfree_skb(pBuf);
31 return;
32 }
33+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18)
34+ /* Restore the original (wrong) pointer. */
35+ pBuf->h.raw = tmp;
36+#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) */
37+ }
38 vboxNetFltLinuxForwardSegment(pThis, pBuf, fSrc);
39 }
40 /*

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