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02017bb235
dhcp/dhcp-3.0.5-xen-checksum.patch

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diff -urN dhcp-3.0.5.xen/common/bpf.c dhcp-3.0.5/common/bpf.c
--- dhcp-3.0.5.xen/common/bpf.c 2004-11-24 12:39:15.000000000 -0500
+++ dhcp-3.0.5/common/bpf.c 2007-01-30 13:23:57.000000000 -0500
@@ -478,7 +478,8 @@
interface -> rbuf,
interface -> rbuf_offset,
from,
- hdr.bh_caplen);
+ hdr.bh_caplen,
+ 0);
/* If the IP or UDP checksum was bad, skip the packet... */
if (offset < 0) {
diff -urN dhcp-3.0.5.xen/common/dlpi.c dhcp-3.0.5/common/dlpi.c
--- dhcp-3.0.5.xen/common/dlpi.c 2004-11-24 12:39:15.000000000 -0500
+++ dhcp-3.0.5/common/dlpi.c 2007-01-30 13:23:57.000000000 -0500
@@ -679,7 +679,7 @@
length -= offset;
#endif
offset = decode_udp_ip_header (interface, dbuf, bufix,
- from, length);
+ from, length, 0);
/* If the IP or UDP checksum was bad, skip the packet... */
if (offset < 0) {
diff -urN dhcp-3.0.5.xen/common/lpf.c dhcp-3.0.5/common/lpf.c
--- dhcp-3.0.5.xen/common/lpf.c 2004-11-24 12:39:15.000000000 -0500
+++ dhcp-3.0.5/common/lpf.c 2007-01-30 13:27:39.000000000 -0500
@@ -34,16 +34,31 @@
#include "dhcpd.h"
#if defined (USE_LPF_SEND) || defined (USE_LPF_RECEIVE)
#include <sys/ioctl.h>
+#include <sys/socket.h>
#include <sys/uio.h>
#include <asm/types.h>
#include <linux/filter.h>
#include <linux/if_ether.h>
+#include <linux/if_packet.h>
#include <netinet/in_systm.h>
#include "includes/netinet/ip.h"
#include "includes/netinet/udp.h"
#include "includes/netinet/if_ether.h"
+#ifndef PACKET_AUXDATA
+#define PACKET_AUXDATA 8
+
+struct tpacket_auxdata
+{
+ __u32 tp_status;
+ __u32 tp_len;
+ __u32 tp_snaplen;
+ __u16 tp_mac;
+ __u16 tp_net;
+};
+#endif
+
/* Reinitializes the specified interface after an address change. This
is not required for packet-filter APIs. */
@@ -69,12 +84,16 @@
struct interface_info *info;
{
int sock;
+ union {
+ struct sockaddr_ll ll;
+ struct sockaddr common;
+ } sa;
+ struct ifreq ifr;
char filename[50];
int b;
- struct sockaddr sa;
/* Make an LPF socket. */
- if ((sock = socket(PF_PACKET, SOCK_PACKET,
+ if ((sock = socket(PF_PACKET, SOCK_RAW,
htons((short)ETH_P_ALL))) < 0) {
if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT ||
errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT ||
@@ -89,11 +108,16 @@
log_fatal ("Open a socket for LPF: %m");
}
+ memset (&ifr, 0, sizeof ifr);
+ strncpy (ifr.ifr_name, (const char *)info -> ifp, sizeof ifr.ifr_name);
+ if (ioctl (sock, SIOCGIFINDEX, &ifr))
+ log_fatal ("Failed to get interface index: %m");
+
/* Bind to the interface name */
memset (&sa, 0, sizeof sa);
- sa.sa_family = AF_PACKET;
- strncpy (sa.sa_data, (const char *)info -> ifp, sizeof sa.sa_data);
- if (bind (sock, &sa, sizeof sa)) {
+ sa.ll.sll_family = AF_PACKET;
+ sa.ll.sll_ifindex = ifr.ifr_ifindex;
+ if (bind (sock, &sa.common, sizeof sa)) {
if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT ||
errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT ||
errno == EAFNOSUPPORT || errno == EINVAL) {
@@ -173,9 +197,18 @@
void if_register_receive (info)
struct interface_info *info;
{
+ int val;
+
/* Open a LPF device and hang it on this interface... */
info -> rfdesc = if_register_lpf (info);
+ val = 1;
+ if (setsockopt (info -> rfdesc, SOL_PACKET, PACKET_AUXDATA, &val,
+ sizeof val) < 0) {
+ if (errno != ENOPROTOOPT)
+ log_fatal ("Failed to set auxiliary packet data: %m");
+ }
+
#if defined (HAVE_TR_SUPPORT)
if (info -> hw_address.hbuf [0] == HTYPE_IEEE802)
lpf_tr_filter_setup (info);
@@ -293,7 +326,6 @@
double hh [16];
double ih [1536 / sizeof (double)];
unsigned char *buf = (unsigned char *)ih;
- struct sockaddr sa;
int result;
int fudge;
@@ -311,15 +343,7 @@
(unsigned char *)raw, len);
memcpy (buf + ibufp, raw, len);
- /* For some reason, SOCK_PACKET sockets can't be connected,
- so we have to do a sentdo every time. */
- memset (&sa, 0, sizeof sa);
- sa.sa_family = AF_PACKET;
- strncpy (sa.sa_data,
- (const char *)interface -> ifp, sizeof sa.sa_data);
-
- result = sendto (interface -> wfdesc,
- buf + fudge, ibufp + len - fudge, 0, &sa, sizeof sa);
+ result = write (interface -> wfdesc, buf + fudge, ibufp + len - fudge);
if (result < 0)
log_error ("send_packet: %m");
return result;
@@ -337,13 +361,34 @@
int nread;
int length = 0;
int offset = 0;
+ int nocsum = 0;
unsigned char ibuf [1536];
unsigned bufix = 0;
+ unsigned char cmsgbuf[CMSG_LEN(sizeof(struct tpacket_auxdata))];
+ struct iovec iov = {
+ .iov_base = ibuf,
+ .iov_len = sizeof ibuf,
+ };
+ struct msghdr msg = {
+ .msg_iov = &iov,
+ .msg_iovlen = 1,
+ .msg_control = cmsgbuf,
+ .msg_controllen = sizeof(cmsgbuf),
+ };
+ struct cmsghdr *cmsg;
- length = read (interface -> rfdesc, ibuf, sizeof ibuf);
+ length = recvmsg (interface -> rfdesc, &msg, 0);
if (length <= 0)
return length;
+ for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
+ if (cmsg->cmsg_level == SOL_PACKET &&
+ cmsg->cmsg_type == PACKET_AUXDATA) {
+ struct tpacket_auxdata *aux = (void *)CMSG_DATA(cmsg);
+ nocsum = aux->tp_status & TP_STATUS_CSUMNOTREADY;
+ }
+ }
+
bufix = 0;
/* Decode the physical header... */
offset = decode_hw_header (interface, ibuf, bufix, hfrom);
@@ -360,7 +405,7 @@
/* Decode the IP and UDP headers... */
offset = decode_udp_ip_header (interface, ibuf, bufix, from,
- (unsigned)length);
+ (unsigned)length, nocsum);
/* If the IP or UDP checksum was bad, skip the packet... */
if (offset < 0)
diff -urN dhcp-3.0.5.xen/common/nit.c dhcp-3.0.5/common/nit.c
--- dhcp-3.0.5.xen/common/nit.c 2004-11-24 12:39:15.000000000 -0500
+++ dhcp-3.0.5/common/nit.c 2007-01-30 13:23:57.000000000 -0500
@@ -370,7 +370,7 @@
/* Decode the IP and UDP headers... */
offset = decode_udp_ip_header (interface, ibuf, bufix,
- from, length);
+ from, length, 0);
/* If the IP or UDP checksum was bad, skip the packet... */
if (offset < 0)
diff -urN dhcp-3.0.5.xen/common/packet.c dhcp-3.0.5/common/packet.c
--- dhcp-3.0.5.xen/common/packet.c 2007-01-30 13:23:27.000000000 -0500
+++ dhcp-3.0.5/common/packet.c 2007-01-30 13:23:57.000000000 -0500
@@ -211,12 +211,13 @@
/* UDP header and IP header decoded together for convenience. */
-ssize_t decode_udp_ip_header (interface, buf, bufix, from, buflen)
+ssize_t decode_udp_ip_header (interface, buf, bufix, from, buflen, nocsum)
struct interface_info *interface;
unsigned char *buf;
unsigned bufix;
struct sockaddr_in *from;
unsigned buflen;
+ int nocsum;
{
unsigned char *data;
struct ip ip;
@@ -319,7 +320,7 @@
(u_int32_t)ulen))));
udp_packets_seen++;
- if (usum && usum != sum) {
+ if (!nocsum && usum && usum != sum) {
udp_packets_bad_checksum++;
if (udp_packets_seen > 4 &&
(udp_packets_seen / udp_packets_bad_checksum) < 2) {
diff -urN dhcp-3.0.5.xen/common/upf.c dhcp-3.0.5/common/upf.c
--- dhcp-3.0.5.xen/common/upf.c 2004-11-24 12:39:16.000000000 -0500
+++ dhcp-3.0.5/common/upf.c 2007-01-30 13:23:57.000000000 -0500
@@ -321,7 +321,7 @@
/* Decode the IP and UDP headers... */
offset = decode_udp_ip_header (interface, ibuf, bufix,
- from, length);
+ from, length, 0);
/* If the IP or UDP checksum was bad, skip the packet... */
if (offset < 0)
diff -urN dhcp-3.0.5.xen/includes/dhcpd.h dhcp-3.0.5/includes/dhcpd.h
--- dhcp-3.0.5.xen/includes/dhcpd.h 2007-01-30 13:23:28.000000000 -0500
+++ dhcp-3.0.5/includes/dhcpd.h 2007-01-30 13:23:57.000000000 -0500
@@ -1948,7 +1948,7 @@
unsigned, struct hardware *));
ssize_t decode_udp_ip_header PROTO ((struct interface_info *, unsigned char *,
unsigned, struct sockaddr_in *,
- unsigned));
+ unsigned, int));
/* ethernet.c */
void assemble_ethernet_header PROTO ((struct interface_info *, unsigned char *,
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