diff options
Diffstat (limited to 'busybox/networking/vconfig.c')
| -rw-r--r-- | busybox/networking/vconfig.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/busybox/networking/vconfig.c b/busybox/networking/vconfig.c new file mode 100644 index 0000000..bbd2987 --- /dev/null +++ b/busybox/networking/vconfig.c @@ -0,0 +1,184 @@ +/* vi: set sw=4 ts=4: */ +/* + * vconfig implementation for busybox + * + * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* BB_AUDIT SUSv3 N/A */ + +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <net/if.h> +#include <string.h> +#include <limits.h> +#include "busybox.h" + +/* Stuff from linux/if_vlan.h, kernel version 2.4.23 */ +enum vlan_ioctl_cmds { + ADD_VLAN_CMD, + DEL_VLAN_CMD, + SET_VLAN_INGRESS_PRIORITY_CMD, + SET_VLAN_EGRESS_PRIORITY_CMD, + GET_VLAN_INGRESS_PRIORITY_CMD, + GET_VLAN_EGRESS_PRIORITY_CMD, + SET_VLAN_NAME_TYPE_CMD, + SET_VLAN_FLAG_CMD +}; +enum vlan_name_types { + VLAN_NAME_TYPE_PLUS_VID, /* Name will look like: vlan0005 */ + VLAN_NAME_TYPE_RAW_PLUS_VID, /* name will look like: eth1.0005 */ + VLAN_NAME_TYPE_PLUS_VID_NO_PAD, /* Name will look like: vlan5 */ + VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, /* Name will look like: eth0.5 */ + VLAN_NAME_TYPE_HIGHEST +}; + +struct vlan_ioctl_args { + int cmd; /* Should be one of the vlan_ioctl_cmds enum above. */ + char device1[24]; + + union { + char device2[24]; + int VID; + unsigned int skb_priority; + unsigned int name_type; + unsigned int bind_type; + unsigned int flag; /* Matches vlan_dev_info flags */ + } u; + + short vlan_qos; +}; + +#define VLAN_GROUP_ARRAY_LEN 4096 +#define SIOCSIFVLAN 0x8983 /* Set 802.1Q VLAN options */ + +/* On entry, table points to the length of the current string plus + * nul terminator plus data length for the subsequent entry. The + * return value is the last data entry for the matching string. */ +static const char *xfind_str(const char *table, const char *str) +{ + while (strcasecmp(str, table+1) != 0) { + if (!*(table += table[0])) { + bb_show_usage(); + } + } + return table - 1; +} + +static const char cmds[] = { + 4, ADD_VLAN_CMD, 7, + 'a', 'd', 'd', 0, + 3, DEL_VLAN_CMD, 7, + 'r', 'e', 'm', 0, + 3, SET_VLAN_NAME_TYPE_CMD, 17, + 's', 'e', 't', '_', + 'n', 'a', 'm', 'e', '_', + 't', 'y', 'p', 'e', 0, + 4, SET_VLAN_FLAG_CMD, 12, + 's', 'e', 't', '_', + 'f', 'l', 'a', 'g', 0, + 5, SET_VLAN_EGRESS_PRIORITY_CMD, 18, + 's', 'e', 't', '_', + 'e', 'g', 'r', 'e', 's', 's', '_', + 'm', 'a', 'p', 0, + 5, SET_VLAN_INGRESS_PRIORITY_CMD, 16, + 's', 'e', 't', '_', + 'i', 'n', 'g', 'r', 'e', 's', 's', '_', + 'm', 'a', 'p', 0, +}; + +static const char name_types[] = { + VLAN_NAME_TYPE_PLUS_VID, 16, + 'V', 'L', 'A', 'N', + '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D', + 0, + VLAN_NAME_TYPE_PLUS_VID_NO_PAD, 22, + 'V', 'L', 'A', 'N', + '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D', + '_', 'N', 'O', '_', 'P', 'A', 'D', 0, + VLAN_NAME_TYPE_RAW_PLUS_VID, 15, + 'D', 'E', 'V', + '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D', + 0, + VLAN_NAME_TYPE_RAW_PLUS_VID_NO_PAD, 20, + 'D', 'E', 'V', + '_', 'P', 'L', 'U', 'S', '_', 'V', 'I', 'D', + '_', 'N', 'O', '_', 'P', 'A', 'D', 0, +}; + +static const char conf_file_name[] = "/proc/net/vlan/config"; + +int vconfig_main(int argc, char **argv) +{ + struct vlan_ioctl_args ifr; + const char *p; + int fd; + + if (argc < 3) { + bb_show_usage(); + } + + /* Don't bother closing the filedes. It will be closed on cleanup. */ + if (open(conf_file_name, O_RDONLY) < 0) { /* Is 802.1q is present? */ + bb_perror_msg_and_die("open %s", conf_file_name); + } + + memset(&ifr, 0, sizeof(struct vlan_ioctl_args)); + + ++argv; + p = xfind_str(cmds+2, *argv); + ifr.cmd = *p; + if (argc != p[-1]) { + bb_show_usage(); + } + + if (ifr.cmd == SET_VLAN_NAME_TYPE_CMD) { /* set_name_type */ + ifr.u.name_type = *xfind_str(name_types+1, argv[1]); + } else { + if (strlen(argv[1]) >= IF_NAMESIZE) { + bb_error_msg_and_die("if_name >= %d chars\n", IF_NAMESIZE); + } + strcpy(ifr.device1, argv[1]); + p = argv[2]; + + /* I suppose one could try to combine some of the function calls below, + * since ifr.u.flag, ifr.u.VID, and ifr.u.skb_priority are all same-sized + * (unsigned) int members of a unions. But because of the range checking, + * doing so wouldn't save that much space and would also make maintainence + * more of a pain. */ + if (ifr.cmd == SET_VLAN_FLAG_CMD) { /* set_flag */ + ifr.u.flag = bb_xgetularg10_bnd(p, 0, 1); + } else if (ifr.cmd == ADD_VLAN_CMD) { /* add */ + ifr.u.VID = bb_xgetularg10_bnd(p, 0, VLAN_GROUP_ARRAY_LEN-1); + } else if (ifr.cmd != DEL_VLAN_CMD) { /* set_{egress|ingress}_map */ + ifr.u.skb_priority = bb_xgetularg10_bnd(p, 0, ULONG_MAX); + ifr.vlan_qos = bb_xgetularg10_bnd(argv[3], 0, 7); + } + } + + if (((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) + || (ioctl(fd, SIOCSIFVLAN, &ifr) < 0) + ) { + bb_perror_msg_and_die("socket or ioctl error for %s", *argv); + } + + return 0; +} + |