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7fa282e616
It is hard to reason about the contents of 'ifr' at any given time as nearly every function sets random fields or pointers in this structure. Use local on-stack clean 'struct ifreq' for each function instead. Reviewed by: kp Differential Revision: https://reviews.freebsd.org/D40534 MFC after: 2 weeks
149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/*-
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* Copyright 2013 Ermal Luci
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* 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 WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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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 <stdlib.h>
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#include <unistd.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <sys/mbuf.h>
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#include <net/if_stf.h>
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#include <arpa/inet.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <errno.h>
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#include "ifconfig.h"
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static int
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do_cmd(if_ctx *ctx, u_long op, void *arg, size_t argsize, int set)
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{
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struct ifdrv ifd = {};
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strlcpy(ifd.ifd_name, ctx->ifname, sizeof(ifd.ifd_name));
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ifd.ifd_cmd = op;
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ifd.ifd_len = argsize;
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ifd.ifd_data = arg;
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return (ioctl_ctx(ctx, set ? SIOCSDRVSPEC : SIOCGDRVSPEC, &ifd));
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}
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static void
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stf_status(if_ctx *ctx)
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{
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struct stfv4args param;
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if (do_cmd(ctx, STF6RD_GV4NET, ¶m, sizeof(param), 0) < 0)
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return;
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printf("\tv4net %s/%d -> ", inet_ntoa(param.srcv4_addr),
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param.v4_prefixlen ? param.v4_prefixlen : 32);
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printf("tv4br %s\n", inet_ntoa(param.braddr));
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}
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static void
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setstf_br(if_ctx *ctx, const char *val, int d __unused)
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{
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struct stfv4args req;
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struct sockaddr_in sin;
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memset(&req, 0, sizeof(req));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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if (!inet_aton(val, &sin.sin_addr))
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errx(1, "%s: bad value", val);
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req.braddr = sin.sin_addr;
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if (do_cmd(ctx, STF6RD_SBR, &req, sizeof(req), 1) < 0)
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err(1, "STF6RD_SBR%s", val);
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}
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static void
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setstf_set(if_ctx *ctx, const char *val, int d __unused)
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{
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struct stfv4args req;
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struct sockaddr_in sin;
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const char *errstr;
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char *p = NULL;
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memset(&req, 0, sizeof(req));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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p = strrchr(val, '/');
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if (p == NULL)
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errx(2, "Wrong argument given");
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*p = '\0';
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req.v4_prefixlen = (int)strtonum(p + 1, 0, 32, &errstr);
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if (errstr != NULL || req.v4_prefixlen == 0) {
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*p = '/';
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errx(1, "%s: bad value (prefix length %s)", val, errstr);
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}
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if (!inet_aton(val, &sin.sin_addr))
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errx(1, "%s: bad value", val);
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memcpy(&req.srcv4_addr, &sin.sin_addr, sizeof(req.srcv4_addr));
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if (do_cmd(ctx, STF6RD_SV4NET, &req, sizeof(req), 1) < 0)
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err(1, "STF6RD_SV4NET %s", val);
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}
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static struct cmd stf_cmds[] = {
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DEF_CMD_ARG("stfv4net", setstf_set),
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DEF_CMD_ARG("stfv4br", setstf_br),
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};
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static struct afswtch af_stf = {
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.af_name = "af_stf",
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.af_af = AF_UNSPEC,
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.af_other_status = stf_status,
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};
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static __constructor void
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stf_ctor(void)
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{
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for (size_t i = 0; i < nitems(stf_cmds); i++)
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cmd_register(&stf_cmds[i]);
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af_register(&af_stf);
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}
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