diff options
Diffstat (limited to 'network_cmds/ifconfig.tproj/ifclone.c')
| -rw-r--r-- | network_cmds/ifconfig.tproj/ifclone.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/network_cmds/ifconfig.tproj/ifclone.c b/network_cmds/ifconfig.tproj/ifclone.c new file mode 100644 index 0000000..127d10b --- /dev/null +++ b/network_cmds/ifconfig.tproj/ifclone.c @@ -0,0 +1,170 @@ +/* + * 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. + */ + +#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" + +static void +list_cloners(void) +{ + struct if_clonereq ifcr; + char *cp, *buf; + int idx; + int s; + + s = socket(AF_INET, SOCK_DGRAM, 0); + if (s == -1) + err(1, "socket(AF_INET,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); +} + +static clone_callback_func *clone_cb = NULL; + +void +clone_setcallback(clone_callback_func *p) +{ + if (clone_cb != NULL && clone_cb != p) + errx(1, "conflicting device create parameters"); + clone_cb = p; +} + +/* + * 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; + + memset(&ifr, 0, sizeof(ifr)); + (void) strlcpy(ifr.ifr_name, name, sizeof(ifr.ifr_name)); + if (clone_cb == NULL) { +#ifdef SIOCIFCREATE2 + /* NB: no parameters */ + if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) + err(1, "SIOCIFCREATE2"); +#else + if (ioctl(s, SIOCIFCREATE, &ifr) < 0) + err(1, "SIOCIFCREATE"); +#endif + } 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) strlcpy(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 = { "C", "[-C]", clone_Copt_cb }; + +static __constructor void +clone_ctor(void) +{ +#define N(a) (sizeof(a) / sizeof(a[0])) + int i; + + for (i = 0; i < N(clone_cmds); i++) + cmd_register(&clone_cmds[i]); + opt_register(&clone_Copt); +#undef N +} |