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249 lines
8.5 KiB
249 lines
8.5 KiB
diff -up dhcp-4.2.2b1/common/bpf.c.xen dhcp-4.2.2b1/common/bpf.c |
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--- dhcp-4.2.2b1/common/bpf.c.xen 2009-11-20 02:48:59.000000000 +0100 |
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+++ dhcp-4.2.2b1/common/bpf.c 2011-07-01 14:00:16.936959001 +0200 |
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@@ -485,7 +485,7 @@ ssize_t receive_packet (interface, buf, |
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offset = decode_udp_ip_header (interface, |
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interface -> rbuf, |
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interface -> rbuf_offset, |
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- from, hdr.bh_caplen, &paylen); |
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+ from, hdr.bh_caplen, &paylen, 0); |
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|
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/* If the IP or UDP checksum was bad, skip the packet... */ |
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if (offset < 0) { |
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diff -up dhcp-4.2.2b1/common/dlpi.c.xen dhcp-4.2.2b1/common/dlpi.c |
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--- dhcp-4.2.2b1/common/dlpi.c.xen 2011-05-11 16:20:59.000000000 +0200 |
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+++ dhcp-4.2.2b1/common/dlpi.c 2011-07-01 14:00:16.937958997 +0200 |
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@@ -693,7 +693,7 @@ ssize_t receive_packet (interface, buf, |
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length -= offset; |
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#endif |
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offset = decode_udp_ip_header (interface, dbuf, bufix, |
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- from, length, &paylen); |
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+ from, length, &paylen, 0); |
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|
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/* |
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* If the IP or UDP checksum was bad, skip the packet... |
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diff -up dhcp-4.2.2b1/common/lpf.c.xen dhcp-4.2.2b1/common/lpf.c |
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--- dhcp-4.2.2b1/common/lpf.c.xen 2011-05-10 16:38:58.000000000 +0200 |
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+++ dhcp-4.2.2b1/common/lpf.c 2011-07-01 14:11:24.725748028 +0200 |
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@@ -29,19 +29,33 @@ |
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#include "dhcpd.h" |
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#if defined (USE_LPF_SEND) || defined (USE_LPF_RECEIVE) |
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#include <sys/ioctl.h> |
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+#include <sys/socket.h> |
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#include <sys/uio.h> |
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#include <errno.h> |
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|
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#include <asm/types.h> |
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#include <linux/filter.h> |
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#include <linux/if_ether.h> |
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+#include <linux/if_packet.h> |
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#include <netinet/in_systm.h> |
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-#include <net/if_packet.h> |
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#include "includes/netinet/ip.h" |
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#include "includes/netinet/udp.h" |
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#include "includes/netinet/if_ether.h" |
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#include <net/if.h> |
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|
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+#ifndef PACKET_AUXDATA |
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+#define PACKET_AUXDATA 8 |
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+ |
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+struct tpacket_auxdata |
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+{ |
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+ __u32 tp_status; |
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+ __u32 tp_len; |
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+ __u32 tp_snaplen; |
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+ __u16 tp_mac; |
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+ __u16 tp_net; |
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+}; |
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+#endif |
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+ |
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/* Reinitializes the specified interface after an address change. This |
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is not required for packet-filter APIs. */ |
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|
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@@ -67,10 +81,14 @@ int if_register_lpf (info) |
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struct interface_info *info; |
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{ |
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int sock; |
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- struct sockaddr sa; |
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+ union { |
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+ struct sockaddr_ll ll; |
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+ struct sockaddr common; |
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+ } sa; |
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+ struct ifreq ifr; |
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|
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/* Make an LPF socket. */ |
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- if ((sock = socket(PF_PACKET, SOCK_PACKET, |
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+ if ((sock = socket(PF_PACKET, SOCK_RAW, |
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htons((short)ETH_P_ALL))) < 0) { |
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if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT || |
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errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT || |
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@@ -85,11 +103,17 @@ int if_register_lpf (info) |
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log_fatal ("Open a socket for LPF: %m"); |
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} |
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+ memset (&ifr, 0, sizeof ifr); |
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+ strncpy (ifr.ifr_name, (const char *)info -> ifp, sizeof ifr.ifr_name); |
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+ ifr.ifr_name[IFNAMSIZ-1] = '\0'; |
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+ if (ioctl (sock, SIOCGIFINDEX, &ifr)) |
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+ log_fatal ("Failed to get interface index: %m"); |
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+ |
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/* Bind to the interface name */ |
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memset (&sa, 0, sizeof sa); |
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- sa.sa_family = AF_PACKET; |
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- strncpy (sa.sa_data, (const char *)info -> ifp, sizeof sa.sa_data); |
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- if (bind (sock, &sa, sizeof sa)) { |
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+ sa.ll.sll_family = AF_PACKET; |
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+ sa.ll.sll_ifindex = ifr.ifr_ifindex; |
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+ if (bind (sock, &sa.common, sizeof sa)) { |
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if (errno == ENOPROTOOPT || errno == EPROTONOSUPPORT || |
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errno == ESOCKTNOSUPPORT || errno == EPFNOSUPPORT || |
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errno == EAFNOSUPPORT || errno == EINVAL) { |
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@@ -171,9 +195,18 @@ static void lpf_gen_filter_setup (struct |
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void if_register_receive (info) |
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struct interface_info *info; |
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{ |
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+ int val; |
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+ |
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/* Open a LPF device and hang it on this interface... */ |
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info -> rfdesc = if_register_lpf (info); |
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|
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+ val = 1; |
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+ if (setsockopt (info -> rfdesc, SOL_PACKET, PACKET_AUXDATA, &val, |
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+ sizeof val) < 0) { |
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+ if (errno != ENOPROTOOPT) |
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+ log_fatal ("Failed to set auxiliary packet data: %m"); |
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+ } |
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+ |
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#if defined (HAVE_TR_SUPPORT) |
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if (info -> hw_address.hbuf [0] == HTYPE_IEEE802) |
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lpf_tr_filter_setup (info); |
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@@ -295,7 +328,6 @@ ssize_t send_packet (interface, packet, |
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double hh [16]; |
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double ih [1536 / sizeof (double)]; |
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unsigned char *buf = (unsigned char *)ih; |
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- struct sockaddr_pkt sa; |
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int result; |
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int fudge; |
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@@ -316,17 +348,7 @@ ssize_t send_packet (interface, packet, |
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(unsigned char *)raw, len); |
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memcpy (buf + ibufp, raw, len); |
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|
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- /* For some reason, SOCK_PACKET sockets can't be connected, |
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- so we have to do a sentdo every time. */ |
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- memset (&sa, 0, sizeof sa); |
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- sa.spkt_family = AF_PACKET; |
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- strncpy ((char *)sa.spkt_device, |
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- (const char *)interface -> ifp, sizeof sa.spkt_device); |
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- sa.spkt_protocol = htons(ETH_P_IP); |
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- |
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- result = sendto (interface -> wfdesc, |
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- buf + fudge, ibufp + len - fudge, 0, |
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- (const struct sockaddr *)&sa, sizeof sa); |
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+ result = write (interface -> wfdesc, buf + fudge, ibufp + len - fudge); |
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if (result < 0) |
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log_error ("send_packet: %m"); |
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return result; |
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@@ -343,14 +365,35 @@ ssize_t receive_packet (interface, buf, |
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{ |
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int length = 0; |
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int offset = 0; |
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+ int nocsum = 0; |
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unsigned char ibuf [1536]; |
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unsigned bufix = 0; |
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unsigned paylen; |
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+ unsigned char cmsgbuf[CMSG_LEN(sizeof(struct tpacket_auxdata))]; |
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+ struct iovec iov = { |
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+ .iov_base = ibuf, |
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+ .iov_len = sizeof ibuf, |
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+ }; |
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+ struct msghdr msg = { |
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+ .msg_iov = &iov, |
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+ .msg_iovlen = 1, |
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+ .msg_control = cmsgbuf, |
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+ .msg_controllen = sizeof(cmsgbuf), |
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+ }; |
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+ struct cmsghdr *cmsg; |
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|
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- length = read (interface -> rfdesc, ibuf, sizeof ibuf); |
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+ length = recvmsg (interface -> rfdesc, &msg, 0); |
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if (length <= 0) |
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return length; |
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|
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+ for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { |
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+ if (cmsg->cmsg_level == SOL_PACKET && |
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+ cmsg->cmsg_type == PACKET_AUXDATA) { |
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+ struct tpacket_auxdata *aux = (void *)CMSG_DATA(cmsg); |
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+ nocsum = aux->tp_status & TP_STATUS_CSUMNOTREADY; |
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+ } |
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+ } |
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+ |
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bufix = 0; |
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/* Decode the physical header... */ |
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offset = decode_hw_header (interface, ibuf, bufix, hfrom); |
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@@ -367,7 +410,7 @@ ssize_t receive_packet (interface, buf, |
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|
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/* Decode the IP and UDP headers... */ |
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offset = decode_udp_ip_header (interface, ibuf, bufix, from, |
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- (unsigned)length, &paylen); |
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+ (unsigned)length, &paylen, nocsum); |
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|
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/* If the IP or UDP checksum was bad, skip the packet... */ |
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if (offset < 0) |
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diff -up dhcp-4.2.2b1/common/nit.c.xen dhcp-4.2.2b1/common/nit.c |
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--- dhcp-4.2.2b1/common/nit.c.xen 2009-11-20 02:49:01.000000000 +0100 |
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+++ dhcp-4.2.2b1/common/nit.c 2011-07-01 14:00:16.939958989 +0200 |
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@@ -369,7 +369,7 @@ ssize_t receive_packet (interface, buf, |
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|
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/* Decode the IP and UDP headers... */ |
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offset = decode_udp_ip_header (interface, ibuf, bufix, |
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- from, length, &paylen); |
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+ from, length, &paylen, 0); |
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|
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/* If the IP or UDP checksum was bad, skip the packet... */ |
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if (offset < 0) |
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diff -up dhcp-4.2.2b1/common/packet.c.xen dhcp-4.2.2b1/common/packet.c |
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--- dhcp-4.2.2b1/common/packet.c.xen 2009-07-23 20:52:20.000000000 +0200 |
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+++ dhcp-4.2.2b1/common/packet.c 2011-07-01 14:00:16.939958989 +0200 |
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@@ -211,7 +211,7 @@ ssize_t |
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decode_udp_ip_header(struct interface_info *interface, |
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unsigned char *buf, unsigned bufix, |
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struct sockaddr_in *from, unsigned buflen, |
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- unsigned *rbuflen) |
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+ unsigned *rbuflen, int nocsum) |
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{ |
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unsigned char *data; |
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struct ip ip; |
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@@ -322,7 +322,7 @@ decode_udp_ip_header(struct interface_in |
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8, IPPROTO_UDP + ulen)))); |
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udp_packets_seen++; |
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- if (usum && usum != sum) { |
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+ if (!nocsum && usum && usum != sum) { |
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udp_packets_bad_checksum++; |
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if (udp_packets_seen > 4 && |
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(udp_packets_seen / udp_packets_bad_checksum) < 2) { |
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diff -up dhcp-4.2.2b1/common/upf.c.xen dhcp-4.2.2b1/common/upf.c |
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--- dhcp-4.2.2b1/common/upf.c.xen 2009-11-20 02:49:01.000000000 +0100 |
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+++ dhcp-4.2.2b1/common/upf.c 2011-07-01 14:00:16.940958986 +0200 |
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@@ -320,7 +320,7 @@ ssize_t receive_packet (interface, buf, |
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|
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/* Decode the IP and UDP headers... */ |
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offset = decode_udp_ip_header (interface, ibuf, bufix, |
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- from, length, &paylen); |
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+ from, length, &paylen, 0); |
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|
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/* If the IP or UDP checksum was bad, skip the packet... */ |
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if (offset < 0) |
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diff -up dhcp-4.2.2b1/includes/dhcpd.h.xen dhcp-4.2.2b1/includes/dhcpd.h |
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--- dhcp-4.2.2b1/includes/dhcpd.h.xen 2011-07-01 14:00:16.000000000 +0200 |
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+++ dhcp-4.2.2b1/includes/dhcpd.h 2011-07-01 14:12:18.069642470 +0200 |
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@@ -2796,7 +2796,7 @@ ssize_t decode_hw_header (struct interfa |
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unsigned, struct hardware *); |
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ssize_t decode_udp_ip_header (struct interface_info *, unsigned char *, |
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unsigned, struct sockaddr_in *, |
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- unsigned, unsigned *); |
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+ unsigned, unsigned *, int); |
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/* ethernet.c */ |
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void assemble_ethernet_header (struct interface_info *, unsigned char *,
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