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Diffstat (limited to 'contrib/isc-dhcp/common/upf.c')
| -rw-r--r-- | contrib/isc-dhcp/common/upf.c | 330 |
1 files changed, 0 insertions, 330 deletions
diff --git a/contrib/isc-dhcp/common/upf.c b/contrib/isc-dhcp/common/upf.c deleted file mode 100644 index 70f8efff1f477..0000000000000 --- a/contrib/isc-dhcp/common/upf.c +++ /dev/null @@ -1,330 +0,0 @@ -/* upf.c - - Ultrix PacketFilter interface code. */ - -/* - * Copyright (c) 1995, 1996, 1997, 1998, 1999 - * The Internet Software Consortium. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of The Internet Software Consortium nor the names - * of its contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND - * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * This software has been written for the Internet Software Consortium - * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie - * Enterprises. To learn more about the Internet Software Consortium, - * see ``http://www.vix.com/isc''. To learn more about Vixie - * Enterprises, see ``http://www.vix.com''. - */ - -#ifndef lint -static char copyright[] = -"$Id: upf.c,v 1.3.2.5 1999/03/29 22:07:13 mellon Exp $ Copyright (c) 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium. All rights reserved.\n"; -#endif /* not lint */ - -#include "dhcpd.h" -#if defined (USE_UPF_SEND) || defined (USE_UPF_RECEIVE) -#include <sys/ioctl.h> -#include <sys/uio.h> - -#include <net/pfilt.h> -#include <netinet/in_systm.h> -#include "includes/netinet/ip.h" -#include "includes/netinet/udp.h" -#include "includes/netinet/if_ether.h" - -/* Reinitializes the specified interface after an address change. This - is not required for packet-filter APIs. */ - -#ifdef USE_UPF_SEND -void if_reinitialize_send (info) - struct interface_info *info; -{ -} -#endif - -#ifdef USE_UPF_RECEIVE -void if_reinitialize_receive (info) - struct interface_info *info; -{ -} -#endif - -/* Called by get_interface_list for each interface that's discovered. - Opens a packet filter for each interface and adds it to the select - mask. */ - -int if_register_upf (info) - struct interface_info *info; -{ - int sock; - char filename[50]; - int b; - struct endevp param; - - /* Open a UPF device */ - for (b = 0; 1; b++) { -#ifndef NO_SNPRINTF - snprintf(filename, sizeof(filename), "/dev/pf/pfilt%d", b); -#else - sprintf(filename, "/dev/pf/pfilt%d", b); -#endif - sock = open (filename, O_RDWR, 0); - if (sock < 0) { - if (errno == EBUSY) { - continue; - } else { - error ("Can't find free upf: %m"); - } - } else { - break; - } - } - - /* Set the UPF device to point at this interface. */ - if (ioctl (sock, EIOCSETIF, info -> ifp) < 0) - error ("Can't attach interface %s to upf device %s: %m", - info -> name, filename); - - /* Get the hardware address. */ - if (ioctl (sock, EIOCDEVP, ¶m) < 0) - error ("Can't get interface %s hardware address: %m", - info -> name); - - /* We only know how to do ethernet. */ - if (param.end_dev_type != ENDT_10MB) - error ("Invalid device type on network interface %s: %d", - info -> name, param.end_dev_type); - - if (param.end_addr_len != 6) - error ("Invalid hardware address length on %s: %d", - info -> name, param.end_addr_len); - - info -> hw_address.hlen = 6; - info -> hw_address.htype = ARPHRD_ETHER; - memcpy (&info -> hw_address.haddr [0], param.end_addr, 6); - - return sock; -} -#endif /* USE_UPF_SEND || USE_UPF_RECEIVE */ - -#ifdef USE_UPF_SEND -void if_register_send (info) - struct interface_info *info; -{ - /* If we're using the upf API for sending and receiving, - we don't need to register this interface twice. */ -#ifndef USE_UPF_RECEIVE - info -> wfdesc = if_register_upf (info, interface); -#else - info -> wfdesc = info -> rfdesc; -#endif - if (!quiet_interface_discovery) - note ("Sending on UPF/%s/%s%s%s", - info -> name, - print_hw_addr (info -> hw_address.htype, - info -> hw_address.hlen, - info -> hw_address.haddr), - (info -> shared_network ? "/" : ""), - (info -> shared_network ? - info -> shared_network -> name : "")); -} -#endif /* USE_UPF_SEND */ - -#ifdef USE_UPF_RECEIVE -/* Packet filter program... - XXX Changes to the filter program may require changes to the constant - offsets used in if_register_send to patch the UPF program! XXX */ - - -void if_register_receive (info) - struct interface_info *info; -{ - int flag = 1; - u_int32_t addr; - struct enfilter pf; - u_int32_t bits; - - /* Open a UPF device and hang it on this interface... */ - info -> rfdesc = if_register_upf (info); - - /* Allow the copyall flag to be set... */ - if (ioctl(info -> rfdesc, EIOCALLOWCOPYALL, &flag) < 0) - error ("Can't set ALLOWCOPYALL: %m"); - - /* Clear all the packet filter mode bits first... */ - flag = (ENHOLDSIG | ENBATCH | ENTSTAMP | ENPROMISC | - ENNONEXCL | ENCOPYALL); - if (ioctl (info -> rfdesc, EIOCMBIC, &flag) < 0) - error ("Can't clear pfilt bits: %m"); - - /* Set the ENBATCH and ENCOPYALL bits... */ - bits = ENBATCH | ENCOPYALL; - if (ioctl (info -> rfdesc, EIOCMBIS, &bits) < 0) - error ("Can't set ENBATCH|ENCOPYALL: %m"); - - /* Set up the UPF filter program. */ - /* XXX Unlike the BPF filter program, this one won't work if the - XXX IP packet is fragmented or if there are options on the IP - XXX header. */ - pf.enf_Priority = 0; - pf.enf_FilterLen = 0; - - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHWORD + 6; - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHLIT + ENF_CAND; - pf.enf_Filter [pf.enf_FilterLen++] = htons (ETHERTYPE_IP); - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHLIT; - pf.enf_Filter [pf.enf_FilterLen++] = htons (IPPROTO_UDP); - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHWORD + 11; - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHLIT + ENF_AND; - pf.enf_Filter [pf.enf_FilterLen++] = htons (0xFF); - pf.enf_Filter [pf.enf_FilterLen++] = ENF_CAND; - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHWORD + 18; - pf.enf_Filter [pf.enf_FilterLen++] = ENF_PUSHLIT + ENF_CAND; - pf.enf_Filter [pf.enf_FilterLen++] = local_port; - - if (ioctl (info -> rfdesc, EIOCSETF, &pf) < 0) - error ("Can't install packet filter program: %m"); - if (!quiet_interface_discovery) - note ("Listening on UPF/%s/%s%s%s", - info -> name, - print_hw_addr (info -> hw_address.htype, - info -> hw_address.hlen, - info -> hw_address.haddr), - (info -> shared_network ? "/" : ""), - (info -> shared_network ? - info -> shared_network -> name : "")); -} -#endif /* USE_UPF_RECEIVE */ - -#ifdef USE_UPF_SEND -ssize_t send_packet (interface, packet, raw, len, from, to, hto) - struct interface_info *interface; - struct packet *packet; - struct dhcp_packet *raw; - size_t len; - struct in_addr from; - struct sockaddr_in *to; - struct hardware *hto; -{ - int bufp = 0; - unsigned char buf [256]; - struct iovec iov [2]; - int result; - - if (!strcmp (interface -> name, "fallback")) - return send_fallback (interface, packet, raw, - len, from, to, hto); - - /* Assemble the headers... */ - assemble_hw_header (interface, buf, &bufp, hto); - assemble_udp_ip_header (interface, buf, &bufp, from.s_addr, - to -> sin_addr.s_addr, to -> sin_port, - (unsigned char *)raw, len); - - /* Fire it off */ - iov [0].iov_base = (char *)buf; - iov [0].iov_len = bufp; - iov [1].iov_base = (char *)raw; - iov [1].iov_len = len; - - result = writev(interface -> wfdesc, iov, 2); - if (result < 0) - warn ("send_packet: %m"); - return result; -} -#endif /* USE_UPF_SEND */ - -#ifdef USE_UPF_RECEIVE -ssize_t receive_packet (interface, buf, len, from, hfrom) - struct interface_info *interface; - unsigned char *buf; - size_t len; - struct sockaddr_in *from; - struct hardware *hfrom; -{ - int nread; - int length = 0; - int offset = 0; - unsigned char ibuf [1500 + sizeof (struct enstamp)]; - int bufix = 0; - - length = read (interface -> rfdesc, ibuf, sizeof ibuf); - if (length <= 0) - return length; - - bufix = sizeof (struct enstamp); - /* Decode the physical header... */ - offset = decode_hw_header (interface, ibuf, bufix, hfrom); - - /* If a physical layer checksum failed (dunno of any - physical layer that supports this, but WTH), skip this - packet. */ - if (offset < 0) { - return 0; - } - - bufix += offset; - length -= offset; - - /* Decode the IP and UDP headers... */ - offset = decode_udp_ip_header (interface, ibuf, bufix, - from, (unsigned char *)0, length); - - /* If the IP or UDP checksum was bad, skip the packet... */ - if (offset < 0) - return 0; - - bufix += offset; - length -= offset; - - /* Copy out the data in the packet... */ - memcpy (buf, &ibuf [bufix], length); - return length; -} - -int can_unicast_without_arp () -{ - return 1; -} - -int can_receive_unicast_unconfigured (ip) - struct interface_info *ip; -{ - return 1; -} - -void maybe_setup_fallback () -{ - struct interface_info *fbi; - fbi = setup_fallback (); - if (fbi) { - if_register_fallback (fbi); - add_protocol ("fallback", fallback_interface -> wfdesc, - fallback_discard, fallback_interface); - } -} -#endif |