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-rw-r--r--networking/udhcp/clientsocket.c108
1 files changed, 0 insertions, 108 deletions
diff --git a/networking/udhcp/clientsocket.c b/networking/udhcp/clientsocket.c
deleted file mode 100644
index 8e68f31..0000000
--- a/networking/udhcp/clientsocket.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * clientsocket.c -- DHCP client socket creation
- *
- * udhcp client
- *
- * Russ Dill <Russ.Dill@asu.edu> July 2001
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-#include "common.h"
-#include "dhcpd.h"
-#include "dhcpc.h"
-
-
-//#include <features.h>
-#include <asm/types.h>
-#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) || defined(_NEWLIB_VERSION)
-#include <netpacket/packet.h>
-#include <net/ethernet.h>
-#else
-#include <linux/if_packet.h>
-#include <linux/if_ether.h>
-#endif
-#include <linux/filter.h>
-
-int FAST_FUNC udhcp_raw_socket(int ifindex)
-{
- int fd;
- struct sockaddr_ll sock;
-
- /*
- * Comment:
- *
- * I've selected not to see LL header, so BPF doesn't see it, too.
- * The filter may also pass non-IP and non-ARP packets, but we do
- * a more complete check when receiving the message in userspace.
- *
- * and filter shamelessly stolen from:
- *
- * http://www.flamewarmaster.de/software/dhcpclient/
- *
- * There are a few other interesting ideas on that page (look under
- * "Motivation"). Use of netlink events is most interesting. Think
- * of various network servers listening for events and reconfiguring.
- * That would obsolete sending HUP signals and/or make use of restarts.
- *
- * Copyright: 2006, 2007 Stefan Rompf <sux@loplof.de>.
- * License: GPL v2.
- *
- * TODO: make conditional?
- */
-#define SERVER_AND_CLIENT_PORTS ((67 << 16) + 68)
- static const struct sock_filter filter_instr[] = {
- /* check for udp */
- BPF_STMT(BPF_LD|BPF_B|BPF_ABS, 9),
- BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, IPPROTO_UDP, 2, 0), /* L5, L1, is UDP? */
- /* ugly check for arp on ethernet-like and IPv4 */
- BPF_STMT(BPF_LD|BPF_W|BPF_ABS, 2), /* L1: */
- BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, 0x08000604, 3, 4), /* L3, L4 */
- /* skip IP header */
- BPF_STMT(BPF_LDX|BPF_B|BPF_MSH, 0), /* L5: */
- /* check udp source and destination ports */
- BPF_STMT(BPF_LD|BPF_W|BPF_IND, 0),
- BPF_JUMP(BPF_JMP|BPF_JEQ|BPF_K, SERVER_AND_CLIENT_PORTS, 0, 1), /* L3, L4 */
- /* returns */
- BPF_STMT(BPF_RET|BPF_K, 0x0fffffff ), /* L3: pass */
- BPF_STMT(BPF_RET|BPF_K, 0), /* L4: reject */
- };
- static const struct sock_fprog filter_prog = {
- .len = sizeof(filter_instr) / sizeof(filter_instr[0]),
- /* casting const away: */
- .filter = (struct sock_filter *) filter_instr,
- };
-
- log1("Opening raw socket on ifindex %d", ifindex); //log2?
-
- fd = xsocket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP));
- log1("Got raw socket fd %d", fd); //log2?
-
- if (SERVER_PORT == 67 && CLIENT_PORT == 68) {
- /* Use only if standard ports are in use */
- /* Ignoring error (kernel may lack support for this) */
- if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter_prog,
- sizeof(filter_prog)) >= 0)
- log1("Attached filter to raw socket fd %d", fd); // log?
- }
-
- sock.sll_family = AF_PACKET;
- sock.sll_protocol = htons(ETH_P_IP);
- sock.sll_ifindex = ifindex;
- xbind(fd, (struct sockaddr *) &sock, sizeof(sock));
- log1("Created raw socket");
-
- return fd;
-}