diff options
Diffstat (limited to 'freebsd-userspace/commands/sbin/ifconfig/ifclone.c')
-rw-r--r-- | freebsd-userspace/commands/sbin/ifconfig/ifclone.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/freebsd-userspace/commands/sbin/ifconfig/ifclone.c b/freebsd-userspace/commands/sbin/ifconfig/ifclone.c new file mode 100644 index 00000000..3dc5a37f --- /dev/null +++ b/freebsd-userspace/commands/sbin/ifconfig/ifclone.c @@ -0,0 +1,198 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. 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. + * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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. + */ + +#ifndef lint +static const char rcsid[] = + "$FreeBSD$"; +#endif /* not lint */ + +#include <sys/queue.h> +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/socket.h> +#include <net/if.h> + +#include <err.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "ifconfig.h" + +#ifdef __rtems__ +#include <freebsd/sys/sockio.h> +#endif + +static void +list_cloners(void) +{ + struct if_clonereq ifcr; + char *cp, *buf; + int idx; + int s; + + s = socket(AF_LOCAL, SOCK_DGRAM, 0); + if (s == -1) + err(1, "socket(AF_LOCAL,SOCK_DGRAM)"); + + memset(&ifcr, 0, sizeof(ifcr)); + + if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0) + err(1, "SIOCIFGCLONERS for count"); + + buf = malloc(ifcr.ifcr_total * IFNAMSIZ); + if (buf == NULL) + err(1, "unable to allocate cloner name buffer"); + + ifcr.ifcr_count = ifcr.ifcr_total; + ifcr.ifcr_buffer = buf; + + if (ioctl(s, SIOCIFGCLONERS, &ifcr) < 0) + err(1, "SIOCIFGCLONERS for names"); + + /* + * In case some disappeared in the mean time, clamp it down. + */ + if (ifcr.ifcr_count > ifcr.ifcr_total) + ifcr.ifcr_count = ifcr.ifcr_total; + + for (cp = buf, idx = 0; idx < ifcr.ifcr_count; idx++, cp += IFNAMSIZ) { + if (idx > 0) + putchar(' '); + printf("%s", cp); + } + + putchar('\n'); + free(buf); +} + +struct clone_defcb { + char ifprefix[IFNAMSIZ]; + clone_callback_func *clone_cb; + SLIST_ENTRY(clone_defcb) next; +}; + +static SLIST_HEAD(, clone_defcb) clone_defcbh = + SLIST_HEAD_INITIALIZER(clone_defcbh); + +void +clone_setdefcallback(const char *ifprefix, clone_callback_func *p) +{ + struct clone_defcb *dcp; + + dcp = malloc(sizeof(*dcp)); + strlcpy(dcp->ifprefix, ifprefix, IFNAMSIZ-1); + dcp->clone_cb = p; + SLIST_INSERT_HEAD(&clone_defcbh, dcp, next); +} + +/* + * Do the actual clone operation. Any parameters must have been + * setup by now. If a callback has been setup to do the work + * then defer to it; otherwise do a simple create operation with + * no parameters. + */ +static void +ifclonecreate(int s, void *arg) +{ + struct ifreq ifr; + struct clone_defcb *dcp; + clone_callback_func *clone_cb = NULL; + + memset(&ifr, 0, sizeof(ifr)); + (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); + + if (clone_cb == NULL) { + /* Try to find a default callback */ + SLIST_FOREACH(dcp, &clone_defcbh, next) { + if (strncmp(dcp->ifprefix, ifr.ifr_name, + strlen(dcp->ifprefix)) == 0) { + clone_cb = dcp->clone_cb; + break; + } + } + } + if (clone_cb == NULL) { + /* NB: no parameters */ + if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) + err(1, "SIOCIFCREATE2"); + } else { + clone_cb(s, &ifr); + } + + /* + * If we get a different name back than we put in, print it. + */ + if (strncmp(name, ifr.ifr_name, sizeof(name)) != 0) { + strlcpy(name, ifr.ifr_name, sizeof(name)); + printf("%s\n", name); + } +} + +static +DECL_CMD_FUNC(clone_create, arg, d) +{ + callback_register(ifclonecreate, NULL); +} + +static +DECL_CMD_FUNC(clone_destroy, arg, d) +{ + (void) strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); + if (ioctl(s, SIOCIFDESTROY, &ifr) < 0) + err(1, "SIOCIFDESTROY"); +} + +static struct cmd clone_cmds[] = { + DEF_CLONE_CMD("create", 0, clone_create), + DEF_CMD("destroy", 0, clone_destroy), + DEF_CLONE_CMD("plumb", 0, clone_create), + DEF_CMD("unplumb", 0, clone_destroy), +}; + +static void +clone_Copt_cb(const char *optarg __unused) +{ + list_cloners(); + exit(0); +} +static struct option clone_Copt = { .opt = "C", .opt_usage = "[-C]", .cb = clone_Copt_cb }; + +static __constructor void +clone_ctor(void) +{ +#define N(a) (sizeof(a) / sizeof(a[0])) + size_t i; + + for (i = 0; i < N(clone_cmds); i++) + cmd_register(&clone_cmds[i]); + opt_register(&clone_Copt); +#undef N +} |