mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-18 11:16:16 +02:00
8c96b4e66a
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33661 3c298f89-4303-0410-b956-a3cf2f4a3e73
87 lines
2.4 KiB
Diff
87 lines
2.4 KiB
Diff
--- a/networking/udhcp/dhcpc.c
|
|
+++ b/networking/udhcp/dhcpc.c
|
|
@@ -26,8 +26,8 @@
|
|
#include "dhcpc.h"
|
|
|
|
#include <netinet/if_ether.h>
|
|
-#include <netpacket/packet.h>
|
|
#include <linux/filter.h>
|
|
+#include <linux/if_packet.h>
|
|
|
|
/* struct client_config_t client_config is in bb_common_bufsiz1 */
|
|
|
|
@@ -846,17 +846,41 @@ static int send_release(uint32_t server,
|
|
static NOINLINE int udhcp_recv_raw_packet(struct dhcp_packet *dhcp_pkt, int fd)
|
|
{
|
|
int bytes;
|
|
+ int nocsum = 0;
|
|
struct ip_udp_dhcp_packet packet;
|
|
uint16_t check;
|
|
+ unsigned char cmsgbuf[CMSG_LEN(sizeof(struct tpacket_auxdata))];
|
|
+ struct iovec iov = {
|
|
+ .iov_base = &packet,
|
|
+ .iov_len = sizeof(packet),
|
|
+ };
|
|
+ struct msghdr msg = {
|
|
+ .msg_iov = &iov,
|
|
+ .msg_iovlen = 1,
|
|
+ .msg_control = cmsgbuf,
|
|
+ .msg_controllen = sizeof(cmsgbuf),
|
|
+ };
|
|
+ struct cmsghdr *cmsg;
|
|
|
|
memset(&packet, 0, sizeof(packet));
|
|
- bytes = safe_read(fd, &packet, sizeof(packet));
|
|
+ do {
|
|
+ bytes = recvmsg(fd, &msg, 0);
|
|
+ } while (bytes < 0 && errno == EINTR);
|
|
+
|
|
if (bytes < 0) {
|
|
log1("Packet read error, ignoring");
|
|
/* NB: possible down interface, etc. Caller should pause. */
|
|
return bytes; /* returns -1 */
|
|
}
|
|
|
|
+ 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;
|
|
+ }
|
|
+ }
|
|
+
|
|
if (bytes < (int) (sizeof(packet.ip) + sizeof(packet.udp))) {
|
|
log1("Packet is too short, ignoring");
|
|
return -2;
|
|
@@ -896,7 +920,7 @@ static NOINLINE int udhcp_recv_raw_packe
|
|
packet.ip.tot_len = packet.udp.len; /* yes, this is needed */
|
|
check = packet.udp.check;
|
|
packet.udp.check = 0;
|
|
- if (check && check != udhcp_checksum(&packet, bytes)) {
|
|
+ if (!nocsum && check && check != udhcp_checksum(&packet, bytes)) {
|
|
log1("Packet with bad UDP checksum received, ignoring");
|
|
return -2;
|
|
}
|
|
@@ -942,6 +966,7 @@ static int udhcp_raw_socket(int ifindex)
|
|
{
|
|
int fd;
|
|
struct sockaddr_ll sock;
|
|
+ int val;
|
|
|
|
/*
|
|
* Comment:
|
|
@@ -1008,6 +1033,13 @@ static int udhcp_raw_socket(int ifindex)
|
|
log1("Attached filter to raw socket fd %d", fd); // log?
|
|
}
|
|
|
|
+ val = 1;
|
|
+ if (setsockopt(fd, SOL_PACKET, PACKET_AUXDATA, &val,
|
|
+ sizeof(val)) < 0) {
|
|
+ if (errno != ENOPROTOOPT)
|
|
+ log1("Failed to set auxiliary packet data for socket fd %d", fd);
|
|
+ }
|
|
+
|
|
log1("Created raw socket");
|
|
|
|
return fd;
|