mirror of
https://github.com/sheumann/hush.git
synced 2024-09-07 13:54:33 +00:00
1446 lines
31 KiB
C
1446 lines
31 KiB
C
/*
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* ifupdown for busybox
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* Based on ifupdown by Anthony Towns
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* Copyright (c) 1999 Anthony Towns <aj@azure.humbug.org.au>
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*
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* Remove checks for kernel version, assume kernel version 2.2.0 or better
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <getopt.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "busybox.h"
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#include "config.h"
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#define IFUPDOWN_VERSION "0.6.4"
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typedef struct interface_defn interface_defn;
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typedef int (execfn)(char *command);
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typedef int (command_set)(interface_defn *ifd, execfn *e);
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typedef struct method {
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char *name;
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command_set *up;
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command_set *down;
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} method;
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typedef struct address_family {
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char *name;
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int n_methods;
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method *method;
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} address_family;
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#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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typedef struct mapping_defn {
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struct mapping_defn *next;
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int max_matches;
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int n_matches;
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char **match;
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char *script;
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int max_mappings;
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int n_mappings;
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char **mapping;
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} mapping_defn;
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#endif
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typedef struct variable {
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char *name;
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char *value;
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} variable;
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struct interface_defn {
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struct interface_defn *next;
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char *iface;
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address_family *address_family;
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method *method;
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int automatic;
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int max_options;
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int n_options;
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variable *option;
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};
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typedef struct interfaces_file {
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int max_autointerfaces;
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int n_autointerfaces;
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char **autointerfaces;
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interface_defn *ifaces;
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#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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mapping_defn *mappings;
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#endif
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} interfaces_file;
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#define MAX_OPT_DEPTH 10
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#define EUNBALBRACK 10001
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#define EUNDEFVAR 10002
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#define MAX_VARNAME 32
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#define EUNBALPER 10000
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static int no_act = 0;
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static int verbose = 0;
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static char **environ = NULL;
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static void addstr(char **buf, size_t *len, size_t *pos, char *str, size_t str_length)
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{
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if (*pos + str_length >= *len) {
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char *newbuf;
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newbuf = xrealloc(*buf, *len * 2 + str_length + 1);
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*buf = newbuf;
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*len = *len * 2 + str_length + 1;
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}
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while (str_length-- >= 1) {
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(*buf)[(*pos)++] = *str;
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str++;
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}
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(*buf)[*pos] = '\0';
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}
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static int strncmpz(char *l, char *r, size_t llen)
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{
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int i = strncmp(l, r, llen);
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if (i == 0) {
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return(-r[llen]);
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} else {
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return(i);
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}
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}
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static char *get_var(char *id, size_t idlen, interface_defn *ifd)
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{
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int i;
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if (strncmpz(id, "iface", idlen) == 0) {
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return (ifd->iface);
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} else {
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for (i = 0; i < ifd->n_options; i++) {
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if (strncmpz(id, ifd->option[i].name, idlen) == 0) {
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return (ifd->option[i].value);
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}
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}
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}
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return(NULL);
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}
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static char *parse(char *command, interface_defn *ifd)
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{
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char *result = NULL;
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size_t pos = 0, len = 0;
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size_t old_pos[MAX_OPT_DEPTH] = { 0 };
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int okay[MAX_OPT_DEPTH] = { 1 };
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int opt_depth = 1;
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while (*command) {
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switch (*command) {
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default:
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addstr(&result, &len, &pos, command, 1);
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command++;
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break;
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case '\\':
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if (command[1]) {
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addstr(&result, &len, &pos, command + 1, 1);
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command += 2;
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} else {
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addstr(&result, &len, &pos, command, 1);
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command++;
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}
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break;
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case '[':
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if (command[1] == '[' && opt_depth < MAX_OPT_DEPTH) {
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old_pos[opt_depth] = pos;
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okay[opt_depth] = 1;
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opt_depth++;
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command += 2;
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} else {
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addstr(&result, &len, &pos, "[", 1);
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command++;
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}
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break;
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case ']':
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if (command[1] == ']' && opt_depth > 1) {
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opt_depth--;
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if (!okay[opt_depth]) {
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pos = old_pos[opt_depth];
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result[pos] = '\0';
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}
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command += 2;
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} else {
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addstr(&result, &len, &pos, "]", 1);
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command++;
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}
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break;
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case '%':
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{
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char *nextpercent;
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char *varvalue;
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command++;
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nextpercent = strchr(command, '%');
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if (!nextpercent) {
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errno = EUNBALPER;
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free(result);
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return (NULL);
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}
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varvalue = get_var(command, nextpercent - command, ifd);
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if (varvalue) {
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addstr(&result, &len, &pos, varvalue, xstrlen(varvalue));
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} else {
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okay[opt_depth - 1] = 0;
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}
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command = nextpercent + 1;
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}
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break;
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}
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}
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if (opt_depth > 1) {
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errno = EUNBALBRACK;
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free(result);
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return(NULL);
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}
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if (!okay[0]) {
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errno = EUNDEFVAR;
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free(result);
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return(NULL);
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}
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return(result);
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}
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static int execute(char *command, interface_defn *ifd, execfn *exec)
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{
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char *out;
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int ret;
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out = parse(command, ifd);
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if (!out) {
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return(0);
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}
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ret = (*exec) (out);
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free(out);
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return(ret);
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}
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPX
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static int static_up_ipx(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ipx_interface add %iface% %frame% %netnum%", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int static_down_ipx(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ipx_interface del %iface% %frame%", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int dynamic_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ipx_interface add %iface% %frame%", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int dynamic_down(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ipx_interface del %iface% %frame%", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static method methods_ipx[] = {
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{ "dynamic", dynamic_up, dynamic_down, },
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{ "static", static_up_ipx, static_down_ipx, },
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};
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address_family addr_ipx = {
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"ipx",
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sizeof(methods_ipx) / sizeof(struct method),
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methods_ipx
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};
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#endif /* IFUP_FEATURE_IPX */
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
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static int loopback_up6(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% add ::1", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int loopback_down6(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% del ::1", ifd, exec))
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return(0);
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}
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return(1);
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}
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static int static_up6(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% [[media %media%]] [[hw %hwaddress%]] [[mtu %mtu%]] up", ifd, exec)) {
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return(0);
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}
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if (!execute("ifconfig %iface% add %address%/%netmask%", ifd, exec)) {
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return(0);
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}
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if (!execute("[[ route -A inet6 add ::/0 gw %gateway% ]]", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int static_down6(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% down", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int v4tunnel_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ip tunnel add %iface% mode sit remote %endpoint% [[local %local%]] [[ttl %ttl%]]", ifd, exec)) {
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return(0);
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}
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if (!execute("ip link set %iface% up", ifd, exec)) {
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return(0);
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}
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if (!execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec)) {
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return(0);
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}
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if (!execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int v4tunnel_down(interface_defn * ifd, execfn * exec)
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{
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if (!execute("ip tunnel del %iface%", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static method methods6[] = {
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{ "v4tunnel", v4tunnel_up, v4tunnel_down, },
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{ "static", static_up6, static_down6, },
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{ "loopback", loopback_up6, loopback_down6, },
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};
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address_family addr_inet6 = {
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"inet6",
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sizeof(methods6) / sizeof(struct method),
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methods6
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};
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#endif /* CONFIG_FEATURE_IFUPDOWN_IPV6 */
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#ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
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static int loopback_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% 127.0.0.1 up", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int loopback_down(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% down", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int static_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig %iface% %address% netmask %netmask% [[broadcast %broadcast%]] [[pointopoint %pointopoint%]] [[media %media%]] [[mtu %mtu%]] [[hw %hwaddress%]] up",
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ifd, exec)) {
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return(0);
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}
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if (!execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int static_down(interface_defn *ifd, execfn *exec)
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{
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if (!execute("[[ route del default gw %gateway% %iface% ]]", ifd, exec)) {
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return(0);
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}
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if (!execute("ifconfig %iface% down", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int execable(char *program)
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{
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struct stat buf;
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if (0 == stat(program, &buf)) {
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if (S_ISREG(buf.st_mode) && (S_IXUSR & buf.st_mode)) {
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return(1);
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}
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}
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return(0);
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}
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static int dhcp_up(interface_defn *ifd, execfn *exec)
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{
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if (execable("/sbin/dhclient")) {
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if (!execute("dhclient -pf /var/run/dhclient.%iface%.pid %iface%", ifd, exec)) {
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return(0);
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}
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} else if (execable("/sbin/pump")) {
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if (!execute("pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]", ifd, exec)) {
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return(0);
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}
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} else if (execable("/sbin/udhcpc")) {
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if (!execute("udhcpc -n -p /var/run/udhcpc.%iface%.pid -i %iface% [[-H %hostname%]] [[-c %clientid%]]", ifd, exec)) {
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return 0;
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}
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} else if (execable("/sbin/dhcpcd")) {
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if (!execute("dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] [[-l %leasetime%]] %iface%", ifd, exec)) {
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return(0);
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}
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}
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return(1);
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}
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static int dhcp_down(interface_defn *ifd, execfn *exec)
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{
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if (execable("/sbin/dhclient")) {
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if (!execute("cat /var/run/dhclient.%iface%.pid | xargs -i kill -TERM {}", ifd, exec)) {
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return(0);
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}
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} else if (execable("/sbin/pump")) {
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if (!execute("pump -i %iface% -k", ifd, exec)) {
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return(0);
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}
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} else if (execable("/sbin/udhcpc")) {
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if (!execute("cat /var/run/udhcpc.%iface%.pid | xargs -i kill -TERM {}", ifd, exec)) {
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return(0);
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}
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} else if (execable("/sbin/dhcpcd")) {
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if (!execute("dhcpcd -k %iface%", ifd, exec)) {
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return(0);
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}
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}
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if (!execute("ifconfig %iface% down", ifd, exec)) {
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return(0);
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}
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return(1);
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}
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static int bootp_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("bootpc [[--bootfile %bootfile%]] --dev %iface% [[--server %server%]] [[--hwaddr %hwaddr%]] --returniffail --serverbcast", ifd, exec)) {
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return 0;
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}
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return 1;
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}
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static int bootp_down(interface_defn *ifd, execfn *exec)
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{
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if (!execute("ifconfig down %iface%", ifd, exec)) {
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return 0;
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}
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return 1;
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}
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static int ppp_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("pon [[%provider%]]", ifd, exec)) {
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return 0;
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}
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return 1;
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}
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static int ppp_down(interface_defn *ifd, execfn *exec)
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{
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if (!execute("poff [[%provider%]]", ifd, exec)) {
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return 0;
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}
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return 1;
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}
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static int wvdial_up(interface_defn *ifd, execfn *exec)
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{
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if (!execute("/sbin/start-stop-daemon --start -x /usr/bin/wvdial -p /var/run/wvdial.%iface% -b -m -- [[ %provider% ]]", ifd, exec)) {
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return 0;
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}
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return 1;
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}
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static int wvdial_down(interface_defn *ifd, execfn *exec)
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{
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if (!execute ("/sbin/start-stop-daemon --stop -x /usr/bin/wvdial -p /var/run/wvdial.%iface% -s 2", ifd, exec)) {
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return 0;
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}
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return 1;
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}
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static method methods[] = {
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{ "wvdial", wvdial_up, wvdial_down, },
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{ "ppp", ppp_up, ppp_down, },
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{ "static", static_up, static_down, },
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{ "bootp", bootp_up, bootp_down, },
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{ "dhcp", dhcp_up, dhcp_down, },
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{ "loopback", loopback_up, loopback_down, },
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};
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address_family addr_inet = {
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"inet",
|
|
sizeof(methods) / sizeof(struct method),
|
|
methods
|
|
};
|
|
|
|
#endif /* ifdef CONFIG_FEATURE_IFUPDOWN_IPV4 */
|
|
|
|
static char *next_word(char *buf, char *word, int maxlen)
|
|
{
|
|
if (!buf)
|
|
return NULL;
|
|
if (!*buf)
|
|
return NULL;
|
|
|
|
while (!isspace(*buf) && *buf) {
|
|
if (maxlen-- > 1)
|
|
*word++ = *buf;
|
|
buf++;
|
|
}
|
|
if (maxlen > 0) {
|
|
*word = '\0';
|
|
}
|
|
|
|
while (isspace(*buf) && *buf) {
|
|
buf++;
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static address_family *get_address_family(address_family *af[], char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; af[i]; i++) {
|
|
if (strcmp(af[i]->name, name) == 0) {
|
|
return af[i];
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static method *get_method(address_family *af, char *name)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < af->n_methods; i++) {
|
|
if (strcmp(af->method[i].name, name) == 0) {
|
|
return &af->method[i];
|
|
}
|
|
}
|
|
return(NULL);
|
|
}
|
|
|
|
static int duplicate_if(interface_defn *ifa, interface_defn *ifb)
|
|
{
|
|
if (strcmp(ifa->iface, ifb->iface) != 0) {
|
|
return(0);
|
|
}
|
|
if (ifa->address_family != ifb->address_family) {
|
|
return(0);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
static int get_line(char **result, size_t * result_len, FILE * f, int *line)
|
|
{
|
|
size_t pos;
|
|
|
|
do {
|
|
pos = 0;
|
|
do {
|
|
if (*result_len - pos < 10) {
|
|
char *newstr = xrealloc(*result, *result_len * 2 + 80);
|
|
*result = newstr;
|
|
*result_len = *result_len * 2 + 80;
|
|
}
|
|
|
|
if (!fgets(*result + pos, *result_len - pos, f)) {
|
|
if (ferror(f) == 0 && pos == 0)
|
|
return 0;
|
|
if (ferror(f) != 0)
|
|
return 0;
|
|
}
|
|
pos += xstrlen(*result + pos);
|
|
} while (pos == *result_len - 1 && (*result)[pos - 1] != '\n');
|
|
|
|
if (pos != 0 && (*result)[pos - 1] == '\n') {
|
|
(*result)[--pos] = '\0';
|
|
}
|
|
|
|
(*line)++;
|
|
{
|
|
int first = 0;
|
|
|
|
while (isspace((*result)[first]) && (*result)[first]) {
|
|
first++;
|
|
}
|
|
|
|
memmove(*result, *result + first, pos - first + 1);
|
|
pos -= first;
|
|
}
|
|
} while ((*result)[0] == '#');
|
|
|
|
while ((*result)[pos - 1] == '\\') {
|
|
(*result)[--pos] = '\0';
|
|
do {
|
|
if (*result_len - pos < 10) {
|
|
char *newstr = xrealloc(*result, *result_len * 2 + 80);
|
|
*result = newstr;
|
|
*result_len = *result_len * 2 + 80;
|
|
}
|
|
|
|
if (!fgets(*result + pos, *result_len - pos, f)) {
|
|
if (ferror(f) == 0 && pos == 0)
|
|
return 0;
|
|
if (ferror(f) != 0)
|
|
return 0;
|
|
}
|
|
pos += xstrlen(*result + pos);
|
|
} while (pos == *result_len - 1 && (*result)[pos - 1] != '\n');
|
|
|
|
if (pos != 0 && (*result)[pos - 1] == '\n') {
|
|
(*result)[--pos] = '\0';
|
|
}
|
|
(*line)++;
|
|
}
|
|
|
|
while (isspace((*result)[pos - 1])) { /* remove trailing whitespace */
|
|
pos--;
|
|
}
|
|
(*result)[pos] = '\0';
|
|
|
|
return 1;
|
|
}
|
|
|
|
static interfaces_file *read_interfaces(char *filename)
|
|
{
|
|
interface_defn *currif = NULL;
|
|
interfaces_file *defn;
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
mapping_defn *currmap = NULL;
|
|
#endif
|
|
FILE *f;
|
|
char firstword[80];
|
|
char *buf = NULL;
|
|
char *rest;
|
|
int line;
|
|
size_t buf_len = 0;
|
|
|
|
enum { NONE, IFACE, MAPPING } currently_processing = NONE;
|
|
|
|
defn = xmalloc(sizeof(interfaces_file));
|
|
defn->max_autointerfaces = defn->n_autointerfaces = 0;
|
|
defn->autointerfaces = NULL;
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
defn->mappings = NULL;
|
|
#endif
|
|
defn->ifaces = NULL;
|
|
f = fopen(filename, "r");
|
|
if (f == NULL) {
|
|
return NULL;
|
|
}
|
|
line = 0;
|
|
|
|
while (get_line(&buf, &buf_len, f, &line)) {
|
|
rest = next_word(buf, firstword, 80);
|
|
if (rest == NULL) {
|
|
continue; /* blank line */
|
|
}
|
|
|
|
if (strcmp(firstword, "mapping") == 0) {
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
currmap = xmalloc(sizeof(mapping_defn));
|
|
currmap->max_matches = 0;
|
|
currmap->n_matches = 0;
|
|
currmap->match = NULL;
|
|
|
|
while ((rest = next_word(rest, firstword, 80))) {
|
|
if (currmap->max_matches == currmap->n_matches) {
|
|
currmap->max_matches = currmap->max_matches * 2 + 1;
|
|
currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
|
|
}
|
|
|
|
currmap->match[currmap->n_matches++] = xstrdup(firstword);
|
|
}
|
|
currmap->max_mappings = 0;
|
|
currmap->n_mappings = 0;
|
|
currmap->mapping = NULL;
|
|
currmap->script = NULL;
|
|
{
|
|
mapping_defn **where = &defn->mappings;
|
|
while (*where != NULL) {
|
|
where = &(*where)->next;
|
|
}
|
|
*where = currmap;
|
|
currmap->next = NULL;
|
|
}
|
|
currently_processing = MAPPING;
|
|
#endif
|
|
} else if (strcmp(firstword, "iface") == 0) {
|
|
{
|
|
char iface_name[80];
|
|
char address_family_name[80];
|
|
char method_name[80];
|
|
address_family *addr_fams[] = {
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
|
|
&addr_inet,
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
|
|
&addr_inet6,
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_IPX
|
|
&addr_ipx,
|
|
#endif
|
|
NULL
|
|
};
|
|
|
|
currif = xmalloc(sizeof(interface_defn));
|
|
|
|
rest = next_word(rest, iface_name, 80);
|
|
rest = next_word(rest, address_family_name, 80);
|
|
rest = next_word(rest, method_name, 80);
|
|
|
|
if (rest == NULL) {
|
|
error_msg("%s:%d: too few parameters for iface line", filename, line);
|
|
return NULL;
|
|
}
|
|
|
|
if (rest[0] != '\0') {
|
|
error_msg("%s:%d: too many parameters for iface line", filename, line);
|
|
return NULL;
|
|
}
|
|
|
|
currif->iface = xstrdup(iface_name);
|
|
|
|
currif->address_family = get_address_family(addr_fams, address_family_name);
|
|
if (!currif->address_family) {
|
|
error_msg("%s:%d: unknown address type", filename, line);
|
|
return NULL;
|
|
}
|
|
|
|
currif->method = get_method(currif->address_family, method_name);
|
|
if (!currif->method) {
|
|
error_msg("%s:%d: unknown method", filename, line);
|
|
return NULL;
|
|
}
|
|
|
|
currif->automatic = 1;
|
|
currif->max_options = 0;
|
|
currif->n_options = 0;
|
|
currif->option = NULL;
|
|
|
|
|
|
{
|
|
interface_defn **where = &defn->ifaces;
|
|
|
|
while (*where != NULL) {
|
|
if (duplicate_if(*where, currif)) {
|
|
error_msg("%s:%d: duplicate interface", filename, line);
|
|
return NULL;
|
|
}
|
|
where = &(*where)->next;
|
|
}
|
|
|
|
*where = currif;
|
|
currif->next = NULL;
|
|
}
|
|
}
|
|
currently_processing = IFACE;
|
|
} else if (strcmp(firstword, "auto") == 0) {
|
|
while ((rest = next_word(rest, firstword, 80))) {
|
|
int i;
|
|
|
|
for (i = 0; i < defn->n_autointerfaces; i++) {
|
|
if (strcmp(firstword, defn->autointerfaces[i]) == 0) {
|
|
perror_msg("%s:%d: interface declared auto twice", filename, line);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (defn->n_autointerfaces == defn->max_autointerfaces) {
|
|
char **tmp;
|
|
|
|
defn->max_autointerfaces *= 2;
|
|
defn->max_autointerfaces++;
|
|
tmp = xrealloc(defn->autointerfaces, sizeof(*tmp) * defn->max_autointerfaces);
|
|
defn->autointerfaces = tmp;
|
|
}
|
|
|
|
defn->autointerfaces[defn->n_autointerfaces] = xstrdup(firstword);
|
|
defn->n_autointerfaces++;
|
|
}
|
|
currently_processing = NONE;
|
|
} else {
|
|
switch (currently_processing) {
|
|
case IFACE:
|
|
{
|
|
int i;
|
|
|
|
if (xstrlen(rest) == 0) {
|
|
error_msg("%s:%d: option with empty value", filename, line);
|
|
return NULL;
|
|
}
|
|
|
|
if (strcmp(firstword, "up") != 0
|
|
&& strcmp(firstword, "down") != 0
|
|
&& strcmp(firstword, "pre-up") != 0
|
|
&& strcmp(firstword, "post-down") != 0) {
|
|
for (i = 0; i < currif->n_options; i++) {
|
|
if (strcmp(currif->option[i].name, firstword) == 0) {
|
|
error_msg("%s:%d: duplicate option", filename, line);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (currif->n_options >= currif->max_options) {
|
|
variable *opt;
|
|
|
|
currif->max_options = currif->max_options + 10;
|
|
opt = xrealloc(currif->option, sizeof(*opt) * currif->max_options);
|
|
currif->option = opt;
|
|
}
|
|
currif->option[currif->n_options].name = xstrdup(firstword);
|
|
currif->option[currif->n_options].value = xstrdup(rest);
|
|
if (!currif->option[currif->n_options].name) {
|
|
perror(filename);
|
|
return NULL;
|
|
}
|
|
if (!currif->option[currif->n_options].value) {
|
|
perror(filename);
|
|
return NULL;
|
|
}
|
|
currif->n_options++;
|
|
break;
|
|
case MAPPING:
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
if (strcmp(firstword, "script") == 0) {
|
|
if (currmap->script != NULL) {
|
|
error_msg("%s:%d: duplicate script in mapping", filename, line);
|
|
return NULL;
|
|
} else {
|
|
currmap->script = xstrdup(rest);
|
|
}
|
|
} else if (strcmp(firstword, "map") == 0) {
|
|
if (currmap->max_mappings == currmap->n_mappings) {
|
|
currmap->max_mappings = currmap->max_mappings * 2 + 1;
|
|
currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
|
|
}
|
|
currmap->mapping[currmap->n_mappings] = xstrdup(rest);
|
|
currmap->n_mappings++;
|
|
} else {
|
|
error_msg("%s:%d: misplaced option", filename, line);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
break;
|
|
case NONE:
|
|
default:
|
|
error_msg("%s:%d: misplaced option", filename, line);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
if (ferror(f) != 0) {
|
|
perror_msg("%s", filename);
|
|
return NULL;
|
|
}
|
|
fclose(f);
|
|
line = -1;
|
|
|
|
return defn;
|
|
}
|
|
|
|
static int check(char *str)
|
|
{
|
|
return (str != NULL);
|
|
}
|
|
|
|
static char *setlocalenv(char *format, char *name, char *value)
|
|
{
|
|
char *result;
|
|
char *here;
|
|
char *there;
|
|
|
|
result = xmalloc(xstrlen(format) + xstrlen(name) + xstrlen(value) + 1);
|
|
|
|
sprintf(result, format, name, value);
|
|
|
|
for (here = there = result; *there != '=' && *there; there++) {
|
|
if (*there == '-')
|
|
*there = '_';
|
|
if (isalpha(*there))
|
|
*there = toupper(*there);
|
|
|
|
if (isalnum(*there) || *there == '_') {
|
|
*here = *there;
|
|
here++;
|
|
}
|
|
}
|
|
memmove(here, there, xstrlen(there) + 1);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void set_environ(interface_defn *iface, char *mode)
|
|
{
|
|
char **environend;
|
|
int i;
|
|
const int n_env_entries = iface->n_options + 5;
|
|
char **ppch;
|
|
|
|
if (environ != NULL) {
|
|
for (ppch = environ; *ppch; ppch++) {
|
|
free(*ppch);
|
|
*ppch = NULL;
|
|
}
|
|
free(environ);
|
|
environ = NULL;
|
|
}
|
|
environ = xmalloc(sizeof(char *) * (n_env_entries + 1 /* for final NULL */ ));
|
|
environend = environ;
|
|
*environend = NULL;
|
|
|
|
for (i = 0; i < iface->n_options; i++) {
|
|
if (strcmp(iface->option[i].name, "up") == 0
|
|
|| strcmp(iface->option[i].name, "down") == 0
|
|
|| strcmp(iface->option[i].name, "pre-up") == 0
|
|
|| strcmp(iface->option[i].name, "post-down") == 0) {
|
|
continue;
|
|
}
|
|
*(environend++) = setlocalenv("IF_%s=%s", iface->option[i].name, iface->option[i].value);
|
|
*environend = NULL;
|
|
}
|
|
|
|
*(environend++) = setlocalenv("%s=%s", "IFACE", iface->iface);
|
|
*environend = NULL;
|
|
*(environend++) = setlocalenv("%s=%s", "ADDRFAM", iface->address_family->name);
|
|
*environend = NULL;
|
|
*(environend++) = setlocalenv("%s=%s", "METHOD", iface->method->name);
|
|
*environend = NULL;
|
|
*(environend++) = setlocalenv("%s=%s", "MODE", mode);
|
|
*environend = NULL;
|
|
*(environend++) = setlocalenv("%s=%s", "PATH", "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin");
|
|
*environend = NULL;
|
|
}
|
|
|
|
static int doit(char *str)
|
|
{
|
|
if (verbose || no_act) {
|
|
error_msg("%s", str);
|
|
}
|
|
if (!no_act) {
|
|
pid_t child;
|
|
int status;
|
|
|
|
fflush(NULL);
|
|
switch (child = fork()) {
|
|
case -1: /* failure */
|
|
return 0;
|
|
case 0: /* child */
|
|
execle("/bin/sh", "/bin/sh", "-c", str, NULL, environ);
|
|
exit(127);
|
|
default: /* parent */
|
|
}
|
|
waitpid(child, &status, 0);
|
|
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
|
|
return 0;
|
|
}
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
static int execute_all(interface_defn *ifd, execfn *exec, char *opt)
|
|
{
|
|
int i;
|
|
char buf[100];
|
|
|
|
for (i = 0; i < ifd->n_options; i++) {
|
|
if (strcmp(ifd->option[i].name, opt) == 0) {
|
|
if (!(*exec) (ifd->option[i].value)) {
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
sprintf(buf, "run-parts /etc/network/if-%s.d", opt);
|
|
(*exec) (buf);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int iface_up(interface_defn *iface)
|
|
{
|
|
if (!iface->method->up(iface, check)) {
|
|
return (-1);
|
|
}
|
|
|
|
set_environ(iface, "start");
|
|
if (!execute_all(iface, doit, "pre-up")) {
|
|
return (0);
|
|
}
|
|
if (!iface->method->up(iface, doit)) {
|
|
return (0);
|
|
}
|
|
if (!execute_all(iface, doit, "up")) {
|
|
return (0);
|
|
}
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int iface_down(interface_defn *iface)
|
|
{
|
|
if (!iface->method->down(iface, check)) {
|
|
return (-1);
|
|
}
|
|
set_environ(iface, "stop");
|
|
if (!execute_all(iface, doit, "down")) {
|
|
return (0);
|
|
}
|
|
if (!iface->method->down(iface, doit)) {
|
|
return (0);
|
|
}
|
|
if (!execute_all(iface, doit, "post-down")) {
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
static int popen2(FILE **in, FILE **out, char *command, ...)
|
|
{
|
|
va_list ap;
|
|
char *argv[11] = { command };
|
|
int argc;
|
|
int infd[2], outfd[2];
|
|
pid_t pid;
|
|
|
|
argc = 1;
|
|
va_start(ap, command);
|
|
while ((argc < 10) && (argv[argc] = va_arg(ap, char *))) {
|
|
argc++;
|
|
}
|
|
argv[argc] = NULL; /* make sure */
|
|
va_end(ap);
|
|
|
|
if (pipe(infd) != 0) {
|
|
return 0;
|
|
}
|
|
|
|
if (pipe(outfd) != 0) {
|
|
close(infd[0]);
|
|
close(infd[1]);
|
|
return 0;
|
|
}
|
|
|
|
fflush(NULL);
|
|
switch (pid = fork()) {
|
|
case -1: /* failure */
|
|
close(infd[0]);
|
|
close(infd[1]);
|
|
close(outfd[0]);
|
|
close(outfd[1]);
|
|
return 0;
|
|
case 0: /* child */
|
|
dup2(infd[0], 0);
|
|
dup2(outfd[1], 1);
|
|
close(infd[0]);
|
|
close(infd[1]);
|
|
close(outfd[0]);
|
|
close(outfd[1]);
|
|
execvp(command, argv);
|
|
exit(127);
|
|
default: /* parent */
|
|
*in = fdopen(infd[1], "w");
|
|
*out = fdopen(outfd[0], "r");
|
|
close(infd[0]);
|
|
close(outfd[1]);
|
|
return pid;
|
|
}
|
|
/* unreached */
|
|
}
|
|
|
|
static int run_mapping(char *physical, char *logical, int len, mapping_defn * map)
|
|
{
|
|
FILE *in, *out;
|
|
int i, status;
|
|
pid_t pid;
|
|
|
|
|
|
pid = popen2(&in, &out, map->script, physical, NULL);
|
|
if (pid == 0) {
|
|
return 0;
|
|
}
|
|
for (i = 0; i < map->n_mappings; i++) {
|
|
fprintf(in, "%s\n", map->mapping[i]);
|
|
}
|
|
fclose(in);
|
|
waitpid(pid, &status, 0);
|
|
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
|
|
if (fgets(logical, len, out)) {
|
|
char *pch = logical + xstrlen(logical) - 1;
|
|
|
|
while (pch >= logical && isspace(*pch))
|
|
*(pch--) = '\0';
|
|
}
|
|
}
|
|
fclose(out);
|
|
|
|
return 1;
|
|
}
|
|
#endif /* CONFIG_FEATURE_IFUPDOWN_MAPPING */
|
|
|
|
|
|
static int lookfor_iface(char **ifaces, int n_ifaces, char *iface)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n_ifaces; i++) {
|
|
if (strncmp(iface, ifaces[i], xstrlen(iface)) == 0) {
|
|
if (ifaces[i][xstrlen(iface)] == '=') {
|
|
return i;
|
|
}
|
|
}
|
|
}
|
|
|
|
return(-1);
|
|
}
|
|
|
|
static void add_to_state(char ***ifaces, int *n_ifaces, int *max_ifaces, char *new_iface)
|
|
{
|
|
if (*max_ifaces == *n_ifaces) {
|
|
*max_ifaces = (*max_ifaces * 2) + 1;
|
|
*ifaces = xrealloc(*ifaces, sizeof(**ifaces) * *max_ifaces);
|
|
}
|
|
|
|
(*ifaces)[(*n_ifaces)++] = new_iface;
|
|
}
|
|
|
|
extern int ifupdown_main(int argc, char **argv)
|
|
{
|
|
int (*cmds) (interface_defn *) = NULL;
|
|
interfaces_file *defn;
|
|
FILE *state_fp = NULL;
|
|
char **target_iface = NULL;
|
|
char **state = NULL; /* list of iface=liface */
|
|
char *interfaces = "/etc/network/interfaces";
|
|
char *statefile = "/etc/network/ifstate";
|
|
|
|
int do_all = 0;
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
int run_mappings = 1;
|
|
#endif
|
|
int force = 0;
|
|
int n_target_ifaces = 0;
|
|
int n_state = 0;
|
|
int max_state = 0;
|
|
int i;
|
|
|
|
if (applet_name[2] == 'u') {
|
|
/* ifup command */
|
|
cmds = iface_up;
|
|
} else {
|
|
/* ifdown command */
|
|
cmds = iface_down;
|
|
}
|
|
|
|
while ((i = getopt(argc, argv, "i:hvnamf")) != -1) {
|
|
switch (i) {
|
|
case 'i': /* interfaces */
|
|
interfaces = xstrdup(optarg);
|
|
break;
|
|
case 'v': /* verbose */
|
|
verbose = 1;
|
|
break;
|
|
case 'a': /* all */
|
|
do_all = 1;
|
|
break;
|
|
case 'n': /* no-act */
|
|
no_act = 1;
|
|
break;
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
case 'm': /* no-mappings */
|
|
run_mappings = 0;
|
|
break;
|
|
#endif
|
|
case 'f': /* force */
|
|
force = 1;
|
|
break;
|
|
default:
|
|
show_usage();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (argc - optind > 0) {
|
|
if (do_all) {
|
|
show_usage();
|
|
}
|
|
} else {
|
|
if (!do_all) {
|
|
show_usage();
|
|
}
|
|
}
|
|
|
|
defn = read_interfaces(interfaces);
|
|
if (!defn) {
|
|
error_msg_and_die("couldn't read interfaces file \"%s\"", interfaces);
|
|
}
|
|
|
|
state_fp = fopen(statefile, no_act ? "r" : "a+");
|
|
if (state_fp == NULL && !no_act) {
|
|
perror_msg_and_die("failed to open statefile %s", statefile);
|
|
}
|
|
|
|
if (state_fp != NULL) {
|
|
char buf[80];
|
|
char *p;
|
|
|
|
if (!no_act) {
|
|
int flags;
|
|
struct flock lock;
|
|
const int state_fd = fileno(state_fp);
|
|
|
|
flags = fcntl(state_fd, F_GETFD);
|
|
if ((flags < 0) || (fcntl(state_fd, F_SETFD, flags | FD_CLOEXEC) < 0)) {
|
|
perror_msg_and_die("failed to set FD_CLOEXEC on statefile %s", statefile);
|
|
}
|
|
|
|
lock.l_type = F_WRLCK;
|
|
lock.l_whence = SEEK_SET;
|
|
lock.l_start = 0;
|
|
lock.l_len = 0;
|
|
|
|
if (fcntl(state_fd, F_SETLKW, &lock) < 0) {
|
|
perror_msg_and_die("failed to lock statefile %s", statefile);
|
|
}
|
|
}
|
|
|
|
rewind(state_fp);
|
|
while ((p = fgets(buf, sizeof buf, state_fp)) != NULL) {
|
|
char *pch;
|
|
|
|
pch = buf + xstrlen(buf) - 1;
|
|
while (pch > buf && isspace(*pch)) {
|
|
pch--;
|
|
}
|
|
*(pch + 1) = '\0';
|
|
|
|
pch = buf;
|
|
while (isspace(*pch)) {
|
|
pch++;
|
|
}
|
|
|
|
add_to_state(&state, &n_state, &max_state, xstrdup(pch));
|
|
}
|
|
}
|
|
|
|
if (do_all) {
|
|
if (cmds == iface_up) {
|
|
target_iface = defn->autointerfaces;
|
|
n_target_ifaces = defn->n_autointerfaces;
|
|
} else if (cmds == iface_down) {
|
|
target_iface = state;
|
|
n_target_ifaces = n_state;
|
|
}
|
|
} else {
|
|
target_iface = argv + optind;
|
|
n_target_ifaces = argc - optind;
|
|
}
|
|
|
|
|
|
for (i = 0; i < n_target_ifaces; i++) {
|
|
interface_defn *currif;
|
|
char iface[80];
|
|
char liface[80];
|
|
char *pch;
|
|
int okay = 0;
|
|
|
|
strncpy(iface, target_iface[i], sizeof(iface));
|
|
iface[sizeof(iface) - 1] = '\0';
|
|
|
|
if ((pch = strchr(iface, '='))) {
|
|
*pch = '\0';
|
|
strncpy(liface, pch + 1, sizeof(liface));
|
|
liface[sizeof(liface) - 1] = '\0';
|
|
} else {
|
|
strncpy(liface, iface, sizeof(liface));
|
|
liface[sizeof(liface) - 1] = '\0';
|
|
}
|
|
if (!force) {
|
|
int already_up = lookfor_iface(state, n_state, iface);;
|
|
|
|
if (cmds == iface_up) {
|
|
/* ifup */
|
|
if (already_up != -1) {
|
|
error_msg("interface %s already configured", iface);
|
|
continue;
|
|
}
|
|
} else {
|
|
/* ifdown */
|
|
if (already_up == -1) {
|
|
error_msg("interface %s not configured", iface);
|
|
continue;
|
|
}
|
|
strncpy(liface, strchr(state[already_up], '=') + 1, 80);
|
|
liface[79] = 0;
|
|
}
|
|
}
|
|
#ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
|
if ((cmds == iface_up) && run_mappings) {
|
|
mapping_defn *currmap;
|
|
|
|
for (currmap = defn->mappings; currmap; currmap = currmap->next) {
|
|
|
|
for (i = 0; i < currmap->n_matches; i++) {
|
|
if (fnmatch(currmap->match[i], liface, 0) != 0)
|
|
continue;
|
|
if (verbose) {
|
|
error_msg("Running mapping script %s on %s", currmap->script, liface);
|
|
}
|
|
run_mapping(iface, liface, sizeof(liface), currmap);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
for (currif = defn->ifaces; currif; currif = currif->next) {
|
|
if (strcmp(liface, currif->iface) == 0) {
|
|
char *oldiface = currif->iface;
|
|
|
|
okay = 1;
|
|
|
|
currif->iface = iface;
|
|
|
|
if (verbose) {
|
|
error_msg("Configuring interface %s=%s (%s)", iface, liface, currif->address_family->name);
|
|
}
|
|
|
|
switch (cmds(currif)) {
|
|
case -1:
|
|
printf
|
|
("Don't seem to be have all the variables for %s/%s.\n",
|
|
liface, currif->address_family->name);
|
|
break;
|
|
case 0:
|
|
/* this wasn't entirely successful, should it be added to
|
|
* the state file?
|
|
*/
|
|
case 1:
|
|
/* successful */
|
|
}
|
|
currif->iface = oldiface;
|
|
}
|
|
}
|
|
|
|
if (!okay && !force) {
|
|
error_msg("Ignoring unknown interface %s=%s.", iface, liface);
|
|
} else {
|
|
int already_up = lookfor_iface(state, n_state, iface);
|
|
|
|
if (cmds == iface_up) {
|
|
char *newiface = xmalloc(xstrlen(iface) + 1 + xstrlen(liface) + 1);
|
|
sprintf(newiface, "%s=%s", iface, liface);
|
|
if (already_up == -1) {
|
|
add_to_state(&state, &n_state, &max_state, newiface);
|
|
} else {
|
|
free(state[already_up]);
|
|
state[already_up] = newiface;
|
|
}
|
|
} else if (cmds == iface_down) {
|
|
if (already_up != -1) {
|
|
state[already_up] = state[--n_state];
|
|
}
|
|
}
|
|
}
|
|
if (state_fp != NULL && !no_act) {
|
|
if (ftruncate(fileno(state_fp), 0) < 0) {
|
|
error_msg_and_die("failed to truncate statefile %s: %s", statefile, strerror(errno));
|
|
}
|
|
|
|
rewind(state_fp);
|
|
for (i = 0; i < n_state; i++) {
|
|
fputs(state[i], state_fp);
|
|
fputc('\n', state_fp);
|
|
}
|
|
fflush(state_fp);
|
|
}
|
|
}
|
|
|
|
if (state_fp != NULL) {
|
|
fclose(state_fp);
|
|
state_fp = NULL;
|
|
}
|
|
|
|
return 0;
|
|
}
|