aboutsummaryrefslogtreecommitdiff
path: root/contrib/isc-dhcp/common/raw.c
diff options
context:
space:
mode:
authorDavid E. O'Brien <obrien@FreeBSD.org>1999-02-10 09:10:13 +0000
committerDavid E. O'Brien <obrien@FreeBSD.org>1999-02-10 09:10:13 +0000
commitcd2d014aab8332077aba9b0f6e0d06678fbe1aff (patch)
tree238471ef1d73dff2645de45ab083d2123bf56b83 /contrib/isc-dhcp/common/raw.c
downloadsrc-cd2d014aab8332077aba9b0f6e0d06678fbe1aff.tar.gz
src-cd2d014aab8332077aba9b0f6e0d06678fbe1aff.zip
Virgin import of ISC-DHCP v2.0b1pl6vendor/isc-dhcp/2.0b1-pl.6
Notes
Notes: svn path=/vendor/isc-dhcp/dist/; revision=43829 svn path=/vendor/isc-dhcp/2.0b1-pl.6/; revision=43831; tag=vendor/isc-dhcp/2.0b1-pl.6
Diffstat (limited to 'contrib/isc-dhcp/common/raw.c')
-rw-r--r--contrib/isc-dhcp/common/raw.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/contrib/isc-dhcp/common/raw.c b/contrib/isc-dhcp/common/raw.c
new file mode 100644
index 000000000000..973ede13b8f9
--- /dev/null
+++ b/contrib/isc-dhcp/common/raw.c
@@ -0,0 +1,132 @@
+/* socket.c
+
+ BSD raw socket interface code... */
+
+/* XXX
+
+ It's not clear how this should work, and that lack of clarity is
+ terribly detrimental to the NetBSD 1.1 kernel - it crashes and
+ burns.
+
+ Using raw sockets ought to be a big win over using BPF or something
+ like it, because you don't need to deal with the complexities of
+ the physical layer, but it appears not to be possible with existing
+ raw socket implementations. This may be worth revisiting in the
+ future. For now, this code can probably be considered a curiosity.
+ Sigh. */
+
+/*
+ * Copyright (c) 1995, 1996 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: raw.c,v 1.11 1997/10/20 21:47:14 mellon Exp $ Copyright (c) 1995, 1996 The Internet Software Consortium. All rights reserved.\n";
+#endif /* not lint */
+
+#include "dhcpd.h"
+
+#if defined (USE_RAW_SEND)
+#include <sys/uio.h>
+
+/* Generic interface registration routine... */
+void if_register_send (info)
+ struct interface_info *info;
+{
+ struct sockaddr_in name;
+ int sock;
+ struct socklist *tmp;
+ int flag;
+
+ /* Set up the address we're going to connect to. */
+ name.sin_family = AF_INET;
+ name.sin_port = local_port;
+ name.sin_addr.s_addr = htonl (INADDR_BROADCAST);
+ memset (name.sin_zero, 0, sizeof (name.sin_zero));
+
+ /* List addresses on which we're listening. */
+ if (!quiet_interface_discovery)
+ note ("Sending on %s, port %d",
+ piaddr (info -> address), htons (local_port));
+ if ((sock = socket (AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
+ error ("Can't create dhcp socket: %m");
+
+ /* Set the BROADCAST option so that we can broadcast DHCP responses. */
+ flag = 1;
+ if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST,
+ &flag, sizeof flag) < 0)
+ error ("Can't set SO_BROADCAST option on dhcp socket: %m");
+
+ /* Set the IP_HDRINCL flag so that we can supply our own IP
+ headers... */
+ if (setsockopt (sock, IPPROTO_IP, IP_HDRINCL, &flag, sizeof flag) < 0)
+ error ("Can't set IP_HDRINCL flag: %m");
+
+ info -> wfdesc = sock;
+ if (!quiet_interface_discovery)
+ note ("Sending on Raw/%s/%s",
+ info -> name,
+ (info -> shared_network ?
+ info -> shared_network -> name : "unattached"));
+}
+
+size_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;
+{
+ unsigned char buf [256];
+ int bufp = 0;
+ struct iovec iov [2];
+
+ /* Assemble the headers... */
+ 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;
+
+ return writev(interface -> wfdesc, iov, 2);
+}
+#endif /* USE_SOCKET_SEND */