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sbin/ifconfig/ifstf.c
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/*- | |||||
* Copyright 2013 Ermal Luci | |||||
* 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. | |||||
* | |||||
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC | |||||
* 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. | |||||
*/ | |||||
#include <sys/param.h> | |||||
#include <sys/ioctl.h> | |||||
#include <sys/socket.h> | |||||
#include <sys/sockio.h> | |||||
#include <stdlib.h> | |||||
#include <unistd.h> | |||||
#include <net/ethernet.h> | |||||
#include <net/if.h> | |||||
#include <net/route.h> | |||||
#include <netinet/in.h> | |||||
#include <sys/mbuf.h> | |||||
#include <net/if_stf.h> | |||||
#include <arpa/inet.h> | |||||
#include <ctype.h> | |||||
#include <stdio.h> | |||||
#include <string.h> | |||||
#include <stdlib.h> | |||||
#include <unistd.h> | |||||
#include <err.h> | |||||
#include <errno.h> | |||||
#include "ifconfig.h" | |||||
static int | |||||
do_cmd(int sock, u_long op, void *arg, size_t argsize, int set) | |||||
{ | |||||
struct ifdrv ifd; | |||||
memset(&ifd, 0, sizeof(ifd)); | |||||
strlcpy(ifd.ifd_name, ifr.ifr_name, sizeof(ifd.ifd_name)); | |||||
ifd.ifd_cmd = op; | |||||
ifd.ifd_len = argsize; | |||||
ifd.ifd_data = arg; | |||||
return (ioctl(sock, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd)); | |||||
} | |||||
static void | |||||
stf_status(int s) | |||||
{ | |||||
struct stfv4args param; | |||||
if (do_cmd(s, STF6RD_GV4NET, ¶m, sizeof(param), 0) < 0) | |||||
return; | |||||
printf("\tv4net %s/%d -> ", inet_ntoa(param.srcv4_addr), | |||||
param.v4_prefixlen ? param.v4_prefixlen : 32); | |||||
printf("tv4br %s\n", inet_ntoa(param.braddr)); | |||||
} | |||||
static void | |||||
setstf_br(const char *val, int d, int s, const struct afswtch *afp) | |||||
{ | |||||
struct stfv4args req; | |||||
struct sockaddr_in sin; | |||||
memset(&req, 0, sizeof(req)); | |||||
sin.sin_len = sizeof(sin); | |||||
sin.sin_family = AF_INET; | |||||
if (!inet_aton(val, &sin.sin_addr)) | |||||
hrs: ifconfig(8) generally resolves a host name wherever an address can be specified. I am not sure… | |||||
kpAuthorUnsubmitted Done Inline ActionsAll examples of 6rd configuration I can find uses the IP address for the BR. The pfSense implementation also only supports using an IP address. All together I'd be inclined to keep this the way it is. It'll be easy to extend later if we do encounter users who want to use a DNS name. The if_stf.4 changes for 6rd describe the configuration command as "The border router IPv4 address is configured with the kp: All examples of 6rd configuration I can find uses the IP address for the BR. The pfSense… | |||||
errx(1, "%s: bad value", val); | |||||
req.braddr = sin.sin_addr; | |||||
if (do_cmd(s, STF6RD_SBR, &req, sizeof(req), 1) < 0) | |||||
err(1, "STF6RD_SBR%s", val); | |||||
} | |||||
static void | |||||
setstf_set(const char *val, int d, int s, const struct afswtch *afp) | |||||
{ | |||||
struct stfv4args req; | |||||
struct sockaddr_in sin; | |||||
const char *errstr; | |||||
char *p = NULL; | |||||
memset(&req, 0, sizeof(req)); | |||||
sin.sin_len = sizeof(sin); | |||||
sin.sin_family = AF_INET; | |||||
p = strrchr(val, '/'); | |||||
if (p == NULL) | |||||
errx(2, "Wrong argument given"); | |||||
*p = '\0'; | |||||
if (!isdigit(*(p + 1))) | |||||
hrsUnsubmitted Done Inline ActionsThis can be removed safely because strtonum() should also check whether it is a number or not. hrs: This can be removed safely because strtonum() should also check whether it is a number or not. | |||||
errstr = "invalid"; | |||||
else | |||||
req.v4_prefixlen = (int)strtonum(p + 1, 0, 32, &errstr); | |||||
hrsUnsubmitted Done Inline ActionsI think either 0 or 32 must be explicity rejected because 0 is silently converted to 32 in the kernel. hrs: I think either 0 or 32 must be explicity rejected because 0 is silently converted to 32 in the… | |||||
if (errstr != NULL) { | |||||
*p = '/'; | |||||
errx(1, "%s: bad value (width %s)", val, errstr); | |||||
hrsUnsubmitted Done Inline Actions"prefix length" is better than "width", I think. hrs: "prefix length" is better than "width", I think. | |||||
} | |||||
if (!inet_aton(val, &sin.sin_addr)) | |||||
errx(1, "%s: bad value", val); | |||||
req.srcv4_addr = sin.sin_addr; | |||||
hrsUnsubmitted Done Inline Actionsmemcpy()? hrs: memcpy()? | |||||
if (do_cmd(s, STF6RD_SV4NET, &req, sizeof(req), 1) < 0) | |||||
err(1, "STF6RD_SV4NET %s", val); | |||||
} | |||||
static struct cmd stf_cmds[] = { | |||||
DEF_CMD_ARG("stfv4net", setstf_set), | |||||
DEF_CMD_ARG("stfv4br", setstf_br), | |||||
}; | |||||
static struct afswtch af_stf = { | |||||
.af_name = "af_stf", | |||||
.af_af = AF_UNSPEC, | |||||
.af_other_status = stf_status, | |||||
}; | |||||
static __constructor void | |||||
stf_ctor(void) | |||||
{ | |||||
int i; | |||||
for (i = 0; i < nitems(stf_cmds); i++) | |||||
cmd_register(&stf_cmds[i]); | |||||
af_register(&af_stf); | |||||
} |
ifconfig(8) generally resolves a host name wherever an address can be specified. I am not sure if it must be supported here because a 6rd configuration is address-family specific, but this should be noted in the manual page at least.