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f325335caf
Split it into two modules: if_gre(4) for GRE encapsulation and if_me(4) for minimal encapsulation within IP. gre(4) changes: * convert to if_transmit; * rework locking: protect access to softc with rmlock, protect from concurrent ioctls with sx lock; * correct interface accounting for outgoing datagramms (count only payload size); * implement generic support for using IPv6 as delivery header; * make implementation conform to the RFC 2784 and partially to RFC 2890; * add support for GRE checksums - calculate for outgoing datagramms and check for inconming datagramms; * add support for sending sequence number in GRE header; * remove support of cached routes. This fixes problem, when gre(4) doesn't work at system startup. But this also removes support for having tunnels with the same addresses for inner and outer header. * deprecate support for various GREXXX ioctls, that doesn't used in FreeBSD. Use our standard ioctls for tunnels. me(4): * implementation conform to RFC 2004; * use if_transmit; * use the same locking model as gre(4); PR: 164475 Differential Revision: D1023 No objections from: net@ Relnotes: yes Sponsored by: Yandex LLC
124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/*-
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* Copyright (c) 2008 Andrew Thompson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <net/if.h>
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#include <net/if_gre.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <err.h>
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#include "ifconfig.h"
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#define GREBITS "\020\01ENABLE_CSUM\02ENABLE_SEQ"
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static void gre_status(int s);
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static void
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gre_status(int s)
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{
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uint32_t opts = 0;
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ifr.ifr_data = (caddr_t)&opts;
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if (ioctl(s, GREGKEY, &ifr) == 0)
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if (opts != 0)
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printf("\tgrekey: 0x%x (%u)\n", opts, opts);
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opts = 0;
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if (ioctl(s, GREGOPTS, &ifr) != 0 || opts == 0)
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return;
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printb("\toptions", opts, GREBITS);
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putchar('\n');
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}
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static void
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setifgrekey(const char *val, int dummy __unused, int s,
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const struct afswtch *afp)
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{
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uint32_t grekey = strtol(val, NULL, 0);
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strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
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ifr.ifr_data = (caddr_t)&grekey;
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if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0)
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warn("ioctl (set grekey)");
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}
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static void
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setifgreopts(const char *val, int d, int s, const struct afswtch *afp)
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{
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uint32_t opts;
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ifr.ifr_data = (caddr_t)&opts;
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if (ioctl(s, GREGOPTS, &ifr) == -1) {
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warn("ioctl(GREGOPTS)");
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return;
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}
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if (d < 0)
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opts &= ~(-d);
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else
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opts |= d;
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if (ioctl(s, GRESOPTS, &ifr) == -1) {
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warn("ioctl(GIFSOPTS)");
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return;
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}
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}
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static struct cmd gre_cmds[] = {
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DEF_CMD_ARG("grekey", setifgrekey),
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DEF_CMD("enable_csum", GRE_ENABLE_CSUM, setifgreopts),
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DEF_CMD("-enable_csum",-GRE_ENABLE_CSUM,setifgreopts),
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DEF_CMD("enable_seq", GRE_ENABLE_SEQ, setifgreopts),
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DEF_CMD("-enable_seq",-GRE_ENABLE_SEQ, setifgreopts),
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};
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static struct afswtch af_gre = {
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.af_name = "af_gre",
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.af_af = AF_UNSPEC,
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.af_other_status = gre_status,
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};
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static __constructor void
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gre_ctor(void)
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{
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#define N(a) (sizeof(a) / sizeof(a[0]))
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size_t i;
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for (i = 0; i < N(gre_cmds); i++)
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cmd_register(&gre_cmds[i]);
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af_register(&af_gre);
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#undef N
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}
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