[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * ifupdown for busybox
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| 4 | * Copyright (c) 2002 Glenn McGrath <bug1@iinet.net.au>
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| 5 | * Copyright (c) 2003-2004 Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Based on ifupdown v 0.6.4 by Anthony Towns
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| 8 | * Copyright (c) 1999 Anthony Towns <aj@azure.humbug.org.au>
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| 9 | *
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| 10 | * Changes to upstream version
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| 11 | * Remove checks for kernel version, assume kernel version 2.2.0 or better.
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| 12 | * Lines in the interfaces file cannot wrap.
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| 13 | * To adhere to the FHS, the default state file is /var/run/ifstate.
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| 14 | *
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| 15 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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| 16 | */
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| 17 |
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| 18 | /* TODO: standardise execute() return codes to return 0 for success and 1 for failure */
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| 19 |
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| 20 | #include <sys/stat.h>
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| 21 | #include <sys/utsname.h>
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| 22 | #include <sys/wait.h>
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| 23 |
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| 24 | #include <ctype.h>
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| 25 | #include <errno.h>
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| 26 | #include <fcntl.h>
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| 27 | #include <fnmatch.h>
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| 28 | #include <getopt.h>
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| 29 | #include <stdarg.h>
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| 30 | #include <stdio.h>
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| 31 | #include <stdlib.h>
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| 32 | #include <string.h>
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| 33 | #include <unistd.h>
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| 34 |
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| 35 | #include "busybox.h"
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| 36 |
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| 37 | #define MAX_OPT_DEPTH 10
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| 38 | #define EUNBALBRACK 10001
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| 39 | #define EUNDEFVAR 10002
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| 40 | #define EUNBALPER 10000
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| 41 |
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| 42 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
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| 43 | #define MAX_INTERFACE_LENGTH 10
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| 44 | #endif
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| 45 |
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| 46 | #if 0
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| 47 | #define debug_noise(fmt, args...) printf(fmt, ## args)
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| 48 | #else
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| 49 | #define debug_noise(fmt, args...)
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| 50 | #endif
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| 51 |
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| 52 | /* Forward declaration */
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| 53 | struct interface_defn_t;
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| 54 |
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| 55 | typedef int (execfn)(char *command);
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| 56 |
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| 57 | struct method_t
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| 58 | {
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| 59 | char *name;
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| 60 | int (*up)(struct interface_defn_t *ifd, execfn *e);
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| 61 | int (*down)(struct interface_defn_t *ifd, execfn *e);
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| 62 | };
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| 63 |
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| 64 | struct address_family_t
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| 65 | {
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| 66 | char *name;
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| 67 | int n_methods;
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| 68 | struct method_t *method;
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| 69 | };
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| 70 |
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| 71 | struct mapping_defn_t
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| 72 | {
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| 73 | struct mapping_defn_t *next;
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| 74 |
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| 75 | int max_matches;
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| 76 | int n_matches;
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| 77 | char **match;
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| 78 |
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| 79 | char *script;
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| 80 |
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| 81 | int max_mappings;
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| 82 | int n_mappings;
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| 83 | char **mapping;
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| 84 | };
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| 85 |
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| 86 | struct variable_t
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| 87 | {
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| 88 | char *name;
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| 89 | char *value;
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| 90 | };
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| 91 |
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| 92 | struct interface_defn_t
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| 93 | {
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| 94 | struct address_family_t *address_family;
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| 95 | struct method_t *method;
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| 96 |
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| 97 | char *iface;
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| 98 | int max_options;
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| 99 | int n_options;
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| 100 | struct variable_t *option;
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| 101 | };
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| 102 |
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| 103 | struct interfaces_file_t
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| 104 | {
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| 105 | llist_t *autointerfaces;
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| 106 | llist_t *ifaces;
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| 107 | struct mapping_defn_t *mappings;
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| 108 | };
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| 109 |
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| 110 | static char no_act = 0;
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| 111 | static char verbose = 0;
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| 112 | static char **__myenviron = NULL;
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| 113 |
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| 114 | #if ENABLE_FEATURE_IFUPDOWN_IPV4 || ENABLE_FEATURE_IFUPDOWN_IPV6
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| 115 |
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| 116 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 117 |
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| 118 | static unsigned int count_bits(unsigned int a)
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| 119 | {
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| 120 | unsigned int result;
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| 121 | result = (a & 0x55) + ((a >> 1) & 0x55);
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| 122 | result = (result & 0x33) + ((result >> 2) & 0x33);
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| 123 | return((result & 0x0F) + ((result >> 4) & 0x0F));
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| 124 | }
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| 125 |
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| 126 | static int count_netmask_bits(char *dotted_quad)
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| 127 | {
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| 128 | unsigned int result, a, b, c, d;
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| 129 | /* Found a netmask... Check if it is dotted quad */
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| 130 | if (sscanf(dotted_quad, "%u.%u.%u.%u", &a, &b, &c, &d) != 4)
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| 131 | return -1;
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| 132 | result = count_bits(a);
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| 133 | result += count_bits(b);
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| 134 | result += count_bits(c);
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| 135 | result += count_bits(d);
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| 136 | return ((int)result);
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| 137 | }
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| 138 | #endif
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| 139 |
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| 140 | static void addstr(char **buf, size_t *len, size_t *pos, char *str, size_t str_length)
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| 141 | {
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| 142 | if (*pos + str_length >= *len) {
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| 143 | char *newbuf;
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| 144 |
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| 145 | newbuf = xrealloc(*buf, *len * 2 + str_length + 1);
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| 146 | *buf = newbuf;
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| 147 | *len = *len * 2 + str_length + 1;
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| 148 | }
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| 149 |
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| 150 | while (str_length-- >= 1) {
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| 151 | (*buf)[(*pos)++] = *str;
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| 152 | str++;
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| 153 | }
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| 154 | (*buf)[*pos] = '\0';
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| 155 | }
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| 156 |
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| 157 | static int strncmpz(char *l, char *r, size_t llen)
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| 158 | {
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| 159 | int i = strncmp(l, r, llen);
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| 160 |
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| 161 | if (i == 0) {
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| 162 | return(-r[llen]);
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| 163 | } else {
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| 164 | return(i);
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| 165 | }
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| 166 | }
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| 167 |
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| 168 | static char *get_var(char *id, size_t idlen, struct interface_defn_t *ifd)
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| 169 | {
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| 170 | int i;
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| 171 |
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| 172 | if (strncmpz(id, "iface", idlen) == 0) {
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| 173 | char *result;
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| 174 | static char label_buf[20];
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| 175 | strncpy(label_buf, ifd->iface, 19);
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| 176 | label_buf[19]=0;
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| 177 | result = strchr(label_buf, ':');
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| 178 | if (result) {
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| 179 | *result=0;
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| 180 | }
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| 181 | return( label_buf);
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| 182 | } else if (strncmpz(id, "label", idlen) == 0) {
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| 183 | return (ifd->iface);
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| 184 | } else {
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| 185 | for (i = 0; i < ifd->n_options; i++) {
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| 186 | if (strncmpz(id, ifd->option[i].name, idlen) == 0) {
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| 187 | return (ifd->option[i].value);
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| 188 | }
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| 189 | }
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| 190 | }
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| 191 |
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| 192 | return(NULL);
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| 193 | }
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| 194 |
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| 195 | static char *parse(char *command, struct interface_defn_t *ifd)
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| 196 | {
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| 197 |
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| 198 | char *result = NULL;
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| 199 | size_t pos = 0, len = 0;
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| 200 | size_t old_pos[MAX_OPT_DEPTH] = { 0 };
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| 201 | int okay[MAX_OPT_DEPTH] = { 1 };
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| 202 | int opt_depth = 1;
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| 203 |
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| 204 | while (*command) {
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| 205 | switch (*command) {
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| 206 |
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| 207 | default:
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| 208 | addstr(&result, &len, &pos, command, 1);
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| 209 | command++;
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| 210 | break;
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| 211 | case '\\':
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| 212 | if (command[1]) {
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| 213 | addstr(&result, &len, &pos, command + 1, 1);
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| 214 | command += 2;
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| 215 | } else {
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| 216 | addstr(&result, &len, &pos, command, 1);
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| 217 | command++;
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| 218 | }
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| 219 | break;
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| 220 | case '[':
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| 221 | if (command[1] == '[' && opt_depth < MAX_OPT_DEPTH) {
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| 222 | old_pos[opt_depth] = pos;
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| 223 | okay[opt_depth] = 1;
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| 224 | opt_depth++;
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| 225 | command += 2;
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| 226 | } else {
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| 227 | addstr(&result, &len, &pos, "[", 1);
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| 228 | command++;
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| 229 | }
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| 230 | break;
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| 231 | case ']':
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| 232 | if (command[1] == ']' && opt_depth > 1) {
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| 233 | opt_depth--;
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| 234 | if (!okay[opt_depth]) {
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| 235 | pos = old_pos[opt_depth];
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| 236 | result[pos] = '\0';
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| 237 | }
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| 238 | command += 2;
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| 239 | } else {
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| 240 | addstr(&result, &len, &pos, "]", 1);
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| 241 | command++;
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| 242 | }
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| 243 | break;
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| 244 | case '%':
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| 245 | {
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| 246 | char *nextpercent;
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| 247 | char *varvalue;
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| 248 |
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| 249 | command++;
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| 250 | nextpercent = strchr(command, '%');
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| 251 | if (!nextpercent) {
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| 252 | errno = EUNBALPER;
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| 253 | free(result);
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| 254 | return (NULL);
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| 255 | }
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| 256 |
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| 257 | varvalue = get_var(command, nextpercent - command, ifd);
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| 258 |
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| 259 | if (varvalue) {
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| 260 | addstr(&result, &len, &pos, varvalue, strlen(varvalue));
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| 261 | } else {
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| 262 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 263 | /* Sigh... Add a special case for 'ip' to convert from
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| 264 | * dotted quad to bit count style netmasks. */
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| 265 | if (strncmp(command, "bnmask", 6)==0) {
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| 266 | int res;
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| 267 | varvalue = get_var("netmask", 7, ifd);
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| 268 | if (varvalue && (res=count_netmask_bits(varvalue)) > 0) {
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| 269 | char argument[255];
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| 270 | sprintf(argument, "%d", res);
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| 271 | addstr(&result, &len, &pos, argument, strlen(argument));
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| 272 | command = nextpercent + 1;
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| 273 | break;
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| 274 | }
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| 275 | }
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| 276 | #endif
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| 277 | okay[opt_depth - 1] = 0;
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| 278 | }
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| 279 |
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| 280 | command = nextpercent + 1;
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| 281 | }
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| 282 | break;
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| 283 | }
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| 284 | }
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| 285 |
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| 286 | if (opt_depth > 1) {
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| 287 | errno = EUNBALBRACK;
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| 288 | free(result);
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| 289 | return(NULL);
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| 290 | }
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| 291 |
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| 292 | if (!okay[0]) {
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| 293 | errno = EUNDEFVAR;
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| 294 | free(result);
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| 295 | return(NULL);
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| 296 | }
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| 297 |
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| 298 | return(result);
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| 299 | }
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| 300 |
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| 301 | static int execute(char *command, struct interface_defn_t *ifd, execfn *exec)
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| 302 | {
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| 303 | char *out;
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| 304 | int ret;
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| 305 |
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| 306 | out = parse(command, ifd);
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| 307 | if (!out) {
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| 308 | return(0);
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| 309 | }
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| 310 | ret = (*exec) (out);
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| 311 |
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| 312 | free(out);
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| 313 | if (ret != 1) {
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| 314 | return(0);
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| 315 | }
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| 316 | return(1);
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| 317 | }
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| 318 | #endif
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| 319 |
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| 320 | #ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
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| 321 | static int loopback_up6(struct interface_defn_t *ifd, execfn *exec)
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| 322 | {
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| 323 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 324 | int result;
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| 325 | result =execute("ip addr add ::1 dev %iface%", ifd, exec);
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| 326 | result += execute("ip link set %iface% up", ifd, exec);
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| 327 | return ((result == 2) ? 2 : 0);
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| 328 | #else
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| 329 | return( execute("ifconfig %iface% add ::1", ifd, exec));
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| 330 | #endif
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| 331 | }
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| 332 |
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| 333 | static int loopback_down6(struct interface_defn_t *ifd, execfn *exec)
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| 334 | {
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| 335 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 336 | return(execute("ip link set %iface% down", ifd, exec));
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| 337 | #else
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| 338 | return(execute("ifconfig %iface% del ::1", ifd, exec));
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| 339 | #endif
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| 340 | }
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| 341 |
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| 342 | static int static_up6(struct interface_defn_t *ifd, execfn *exec)
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| 343 | {
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| 344 | int result;
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| 345 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 346 | result = execute("ip addr add %address%/%netmask% dev %iface% [[label %label%]]", ifd, exec);
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| 347 | result += execute("ip link set [[mtu %mtu%]] [[address %hwaddress%]] %iface% up", ifd, exec);
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| 348 | result += execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec);
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| 349 | #else
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| 350 | result = execute("ifconfig %iface% [[media %media%]] [[hw %hwaddress%]] [[mtu %mtu%]] up", ifd, exec);
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| 351 | result += execute("ifconfig %iface% add %address%/%netmask%", ifd, exec);
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| 352 | result += execute("[[ route -A inet6 add ::/0 gw %gateway% ]]", ifd, exec);
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| 353 | #endif
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| 354 | return ((result == 3) ? 3 : 0);
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| 355 | }
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| 356 |
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| 357 | static int static_down6(struct interface_defn_t *ifd, execfn *exec)
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| 358 | {
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| 359 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 360 | return(execute("ip link set %iface% down", ifd, exec));
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| 361 | #else
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| 362 | return(execute("ifconfig %iface% down", ifd, exec));
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| 363 | #endif
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| 364 | }
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| 365 |
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| 366 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 367 | static int v4tunnel_up(struct interface_defn_t *ifd, execfn *exec)
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| 368 | {
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| 369 | int result;
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| 370 | result = execute("ip tunnel add %iface% mode sit remote "
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| 371 | "%endpoint% [[local %local%]] [[ttl %ttl%]]", ifd, exec);
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| 372 | result += execute("ip link set %iface% up", ifd, exec);
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| 373 | result += execute("ip addr add %address%/%netmask% dev %iface%", ifd, exec);
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| 374 | result += execute("[[ ip route add ::/0 via %gateway% ]]", ifd, exec);
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| 375 | return ((result == 4) ? 4 : 0);
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| 376 | }
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| 377 |
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| 378 | static int v4tunnel_down(struct interface_defn_t * ifd, execfn * exec)
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| 379 | {
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| 380 | return( execute("ip tunnel del %iface%", ifd, exec));
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| 381 | }
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| 382 | #endif
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| 383 |
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| 384 | static struct method_t methods6[] = {
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| 385 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 386 | { "v4tunnel", v4tunnel_up, v4tunnel_down, },
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| 387 | #endif
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| 388 | { "static", static_up6, static_down6, },
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| 389 | { "loopback", loopback_up6, loopback_down6, },
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| 390 | };
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| 391 |
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| 392 | static struct address_family_t addr_inet6 = {
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| 393 | "inet6",
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| 394 | sizeof(methods6) / sizeof(struct method_t),
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| 395 | methods6
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| 396 | };
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| 397 | #endif /* CONFIG_FEATURE_IFUPDOWN_IPV6 */
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| 398 |
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| 399 | #ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
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| 400 | static int loopback_up(struct interface_defn_t *ifd, execfn *exec)
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| 401 | {
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| 402 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 403 | int result;
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| 404 | result = execute("ip addr add 127.0.0.1/8 dev %iface%", ifd, exec);
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| 405 | result += execute("ip link set %iface% up", ifd, exec);
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| 406 | return ((result == 2) ? 2 : 0);
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| 407 | #else
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| 408 | return( execute("ifconfig %iface% 127.0.0.1 up", ifd, exec));
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| 409 | #endif
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| 410 | }
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| 411 |
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| 412 | static int loopback_down(struct interface_defn_t *ifd, execfn *exec)
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| 413 | {
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| 414 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 415 | int result;
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| 416 | result = execute("ip addr flush dev %iface%", ifd, exec);
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| 417 | result += execute("ip link set %iface% down", ifd, exec);
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| 418 | return ((result == 2) ? 2 : 0);
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| 419 | #else
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| 420 | return( execute("ifconfig %iface% 127.0.0.1 down", ifd, exec));
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| 421 | #endif
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| 422 | }
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| 423 |
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| 424 | static int static_up(struct interface_defn_t *ifd, execfn *exec)
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| 425 | {
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| 426 | int result;
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| 427 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
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| 428 | result = execute("ip addr add %address%/%bnmask% [[broadcast %broadcast%]] "
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| 429 | "dev %iface% [[peer %pointopoint%]] [[label %label%]]", ifd, exec);
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| 430 | result += execute("ip link set [[mtu %mtu%]] [[address %hwaddress%]] %iface% up", ifd, exec);
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| 431 | result += execute("[[ ip route add default via %gateway% dev %iface% ]]", ifd, exec);
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| 432 | return ((result == 3) ? 3 : 0);
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| 433 | #else
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| 434 | result = execute("ifconfig %iface% %address% netmask %netmask% "
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| 435 | "[[broadcast %broadcast%]] [[pointopoint %pointopoint%]] "
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| 436 | "[[media %media%]] [[mtu %mtu%]] [[hw %hwaddress%]] up",
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| 437 | ifd, exec);
|
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| 438 | result += execute("[[ route add default gw %gateway% %iface% ]]", ifd, exec);
|
---|
| 439 | return ((result == 2) ? 2 : 0);
|
---|
| 440 | #endif
|
---|
| 441 | }
|
---|
| 442 |
|
---|
| 443 | static int static_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 444 | {
|
---|
| 445 | int result;
|
---|
| 446 | #ifdef CONFIG_FEATURE_IFUPDOWN_IP
|
---|
| 447 | result = execute("ip addr flush dev %iface%", ifd, exec);
|
---|
| 448 | result += execute("ip link set %iface% down", ifd, exec);
|
---|
| 449 | #else
|
---|
| 450 | result = execute("[[ route del default gw %gateway% %iface% ]]", ifd, exec);
|
---|
| 451 | result += execute("ifconfig %iface% down", ifd, exec);
|
---|
| 452 | #endif
|
---|
| 453 | return ((result == 2) ? 2 : 0);
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | static int execable(char *program)
|
---|
| 457 | {
|
---|
| 458 | struct stat buf;
|
---|
| 459 | if (0 == stat(program, &buf)) {
|
---|
| 460 | if (S_ISREG(buf.st_mode) && (S_IXUSR & buf.st_mode)) {
|
---|
| 461 | return(1);
|
---|
| 462 | }
|
---|
| 463 | }
|
---|
| 464 | return(0);
|
---|
| 465 | }
|
---|
| 466 |
|
---|
| 467 | static int dhcp_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 468 | {
|
---|
| 469 | if (execable("/sbin/udhcpc")) {
|
---|
| 470 | return( execute("udhcpc -n -p /var/run/udhcpc.%iface%.pid -i "
|
---|
| 471 | "%iface% [[-H %hostname%]] [[-c %clientid%]]", ifd, exec));
|
---|
| 472 | } else if (execable("/sbin/pump")) {
|
---|
| 473 | return( execute("pump -i %iface% [[-h %hostname%]] [[-l %leasehours%]]", ifd, exec));
|
---|
| 474 | } else if (execable("/sbin/dhclient")) {
|
---|
| 475 | return( execute("dhclient -pf /var/run/dhclient.%iface%.pid %iface%", ifd, exec));
|
---|
| 476 | } else if (execable("/sbin/dhcpcd")) {
|
---|
| 477 | return( execute("dhcpcd [[-h %hostname%]] [[-i %vendor%]] [[-I %clientid%]] "
|
---|
| 478 | "[[-l %leasetime%]] %iface%", ifd, exec));
|
---|
| 479 | }
|
---|
| 480 | return(0);
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | static int dhcp_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 484 | {
|
---|
| 485 | int result = 0;
|
---|
| 486 | if (execable("/sbin/udhcpc")) {
|
---|
| 487 | /* SIGUSR2 forces udhcpc to release the current lease and go inactive,
|
---|
| 488 | * and SIGTERM causes udhcpc to exit. Signals are queued and processed
|
---|
| 489 | * sequentially so we don't need to sleep */
|
---|
| 490 | result = execute("kill -USR2 `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null", ifd, exec);
|
---|
| 491 | result += execute("kill -TERM `cat /var/run/udhcpc.%iface%.pid` 2>/dev/null", ifd, exec);
|
---|
| 492 | } else if (execable("/sbin/pump")) {
|
---|
| 493 | result = execute("pump -i %iface% -k", ifd, exec);
|
---|
| 494 | } else if (execable("/sbin/dhclient")) {
|
---|
| 495 | result = execute("kill -9 `cat /var/run/dhclient.%iface%.pid` 2>/dev/null", ifd, exec);
|
---|
| 496 | } else if (execable("/sbin/dhcpcd")) {
|
---|
| 497 | result = execute("dhcpcd -k %iface%", ifd, exec);
|
---|
| 498 | }
|
---|
| 499 | return (result || static_down(ifd, exec));
|
---|
| 500 | }
|
---|
| 501 |
|
---|
| 502 | static int bootp_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 503 | {
|
---|
| 504 | return( execute("bootpc [[--bootfile %bootfile%]] --dev %iface% "
|
---|
| 505 | "[[--server %server%]] [[--hwaddr %hwaddr%]] "
|
---|
| 506 | "--returniffail --serverbcast", ifd, exec));
|
---|
| 507 | }
|
---|
| 508 |
|
---|
| 509 | static int ppp_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 510 | {
|
---|
| 511 | return( execute("pon [[%provider%]]", ifd, exec));
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | static int ppp_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 515 | {
|
---|
| 516 | return( execute("poff [[%provider%]]", ifd, exec));
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | static int wvdial_up(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 520 | {
|
---|
| 521 | return( execute("/sbin/start-stop-daemon --start -x /usr/bin/wvdial "
|
---|
| 522 | "-p /var/run/wvdial.%iface% -b -m -- [[ %provider% ]]", ifd, exec));
|
---|
| 523 | }
|
---|
| 524 |
|
---|
| 525 | static int wvdial_down(struct interface_defn_t *ifd, execfn *exec)
|
---|
| 526 | {
|
---|
| 527 | return( execute("/sbin/start-stop-daemon --stop -x /usr/bin/wvdial "
|
---|
| 528 | "-p /var/run/wvdial.%iface% -s 2", ifd, exec));
|
---|
| 529 | }
|
---|
| 530 |
|
---|
| 531 | static struct method_t methods[] =
|
---|
| 532 | {
|
---|
| 533 | { "wvdial", wvdial_up, wvdial_down, },
|
---|
| 534 | { "ppp", ppp_up, ppp_down, },
|
---|
| 535 | { "static", static_up, static_down, },
|
---|
| 536 | { "bootp", bootp_up, static_down, },
|
---|
| 537 | { "dhcp", dhcp_up, dhcp_down, },
|
---|
| 538 | { "loopback", loopback_up, loopback_down, },
|
---|
| 539 | };
|
---|
| 540 |
|
---|
| 541 | static struct address_family_t addr_inet =
|
---|
| 542 | {
|
---|
| 543 | "inet",
|
---|
| 544 | sizeof(methods) / sizeof(struct method_t),
|
---|
| 545 | methods
|
---|
| 546 | };
|
---|
| 547 |
|
---|
| 548 | #endif /* ifdef CONFIG_FEATURE_IFUPDOWN_IPV4 */
|
---|
| 549 |
|
---|
| 550 | static char *next_word(char **buf)
|
---|
| 551 | {
|
---|
| 552 | unsigned short length;
|
---|
| 553 | char *word;
|
---|
| 554 |
|
---|
| 555 | if ((buf == NULL) || (*buf == NULL) || (**buf == '\0')) {
|
---|
| 556 | return NULL;
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | /* Skip over leading whitespace */
|
---|
| 560 | word = *buf;
|
---|
| 561 | while (isspace(*word)) {
|
---|
| 562 | ++word;
|
---|
| 563 | }
|
---|
| 564 |
|
---|
| 565 | /* Skip over comments */
|
---|
| 566 | if (*word == '#') {
|
---|
| 567 | return(NULL);
|
---|
| 568 | }
|
---|
| 569 |
|
---|
| 570 | /* Find the length of this word */
|
---|
| 571 | length = strcspn(word, " \t\n");
|
---|
| 572 | if (length == 0) {
|
---|
| 573 | return(NULL);
|
---|
| 574 | }
|
---|
| 575 | *buf = word + length;
|
---|
| 576 | /*DBU:[dave@cray.com] if we are already at EOL dont't increment beyond it */
|
---|
| 577 | if (**buf) {
|
---|
| 578 | **buf = '\0';
|
---|
| 579 | (*buf)++;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | return word;
|
---|
| 583 | }
|
---|
| 584 |
|
---|
| 585 | static struct address_family_t *get_address_family(struct address_family_t *af[], char *name)
|
---|
| 586 | {
|
---|
| 587 | int i;
|
---|
| 588 |
|
---|
| 589 | for (i = 0; af[i]; i++) {
|
---|
| 590 | if (strcmp(af[i]->name, name) == 0) {
|
---|
| 591 | return af[i];
|
---|
| 592 | }
|
---|
| 593 | }
|
---|
| 594 | return NULL;
|
---|
| 595 | }
|
---|
| 596 |
|
---|
| 597 | static struct method_t *get_method(struct address_family_t *af, char *name)
|
---|
| 598 | {
|
---|
| 599 | int i;
|
---|
| 600 |
|
---|
| 601 | for (i = 0; i < af->n_methods; i++) {
|
---|
| 602 | if (strcmp(af->method[i].name, name) == 0) {
|
---|
| 603 | return &af->method[i];
|
---|
| 604 | }
|
---|
| 605 | }
|
---|
| 606 | return(NULL);
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 | static const llist_t *find_list_string(const llist_t *list, const char *string)
|
---|
| 610 | {
|
---|
| 611 | while (list) {
|
---|
| 612 | if (strcmp(list->data, string) == 0) {
|
---|
| 613 | return(list);
|
---|
| 614 | }
|
---|
| 615 | list = list->link;
|
---|
| 616 | }
|
---|
| 617 | return(NULL);
|
---|
| 618 | }
|
---|
| 619 |
|
---|
| 620 | static struct interfaces_file_t *read_interfaces(const char *filename)
|
---|
| 621 | {
|
---|
| 622 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 623 | struct mapping_defn_t *currmap = NULL;
|
---|
| 624 | #endif
|
---|
| 625 | struct interface_defn_t *currif = NULL;
|
---|
| 626 | struct interfaces_file_t *defn;
|
---|
| 627 | FILE *f;
|
---|
| 628 | char *firstword;
|
---|
| 629 | char *buf;
|
---|
| 630 |
|
---|
| 631 | enum { NONE, IFACE, MAPPING } currently_processing = NONE;
|
---|
| 632 |
|
---|
| 633 | defn = xzalloc(sizeof(struct interfaces_file_t));
|
---|
| 634 |
|
---|
| 635 | f = bb_xfopen(filename, "r");
|
---|
| 636 |
|
---|
| 637 | while ((buf = bb_get_chomped_line_from_file(f)) != NULL) {
|
---|
| 638 | char *buf_ptr = buf;
|
---|
| 639 |
|
---|
| 640 | firstword = next_word(&buf_ptr);
|
---|
| 641 | if (firstword == NULL) {
|
---|
| 642 | free(buf);
|
---|
| 643 | continue; /* blank line */
|
---|
| 644 | }
|
---|
| 645 |
|
---|
| 646 | if (strcmp(firstword, "mapping") == 0) {
|
---|
| 647 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 648 | currmap = xzalloc(sizeof(struct mapping_defn_t));
|
---|
| 649 |
|
---|
| 650 | while ((firstword = next_word(&buf_ptr)) != NULL) {
|
---|
| 651 | if (currmap->max_matches == currmap->n_matches) {
|
---|
| 652 | currmap->max_matches = currmap->max_matches * 2 + 1;
|
---|
| 653 | currmap->match = xrealloc(currmap->match, sizeof(currmap->match) * currmap->max_matches);
|
---|
| 654 | }
|
---|
| 655 |
|
---|
| 656 | currmap->match[currmap->n_matches++] = bb_xstrdup(firstword);
|
---|
| 657 | }
|
---|
| 658 | currmap->max_mappings = 0;
|
---|
| 659 | currmap->n_mappings = 0;
|
---|
| 660 | currmap->mapping = NULL;
|
---|
| 661 | currmap->script = NULL;
|
---|
| 662 | {
|
---|
| 663 | struct mapping_defn_t **where = &defn->mappings;
|
---|
| 664 | while (*where != NULL) {
|
---|
| 665 | where = &(*where)->next;
|
---|
| 666 | }
|
---|
| 667 | *where = currmap;
|
---|
| 668 | currmap->next = NULL;
|
---|
| 669 | }
|
---|
| 670 | debug_noise("Added mapping\n");
|
---|
| 671 | #endif
|
---|
| 672 | currently_processing = MAPPING;
|
---|
| 673 | } else if (strcmp(firstword, "iface") == 0) {
|
---|
| 674 | {
|
---|
| 675 | char *iface_name;
|
---|
| 676 | char *address_family_name;
|
---|
| 677 | char *method_name;
|
---|
| 678 | struct address_family_t *addr_fams[] = {
|
---|
| 679 | #ifdef CONFIG_FEATURE_IFUPDOWN_IPV4
|
---|
| 680 | &addr_inet,
|
---|
| 681 | #endif
|
---|
| 682 | #ifdef CONFIG_FEATURE_IFUPDOWN_IPV6
|
---|
| 683 | &addr_inet6,
|
---|
| 684 | #endif
|
---|
| 685 | NULL
|
---|
| 686 | };
|
---|
| 687 |
|
---|
| 688 | currif = xzalloc(sizeof(struct interface_defn_t));
|
---|
| 689 | iface_name = next_word(&buf_ptr);
|
---|
| 690 | address_family_name = next_word(&buf_ptr);
|
---|
| 691 | method_name = next_word(&buf_ptr);
|
---|
| 692 |
|
---|
| 693 | if (buf_ptr == NULL) {
|
---|
| 694 | bb_error_msg("too few parameters for line \"%s\"", buf);
|
---|
| 695 | return NULL;
|
---|
| 696 | }
|
---|
| 697 |
|
---|
| 698 | /* ship any trailing whitespace */
|
---|
| 699 | while (isspace(*buf_ptr)) {
|
---|
| 700 | ++buf_ptr;
|
---|
| 701 | }
|
---|
| 702 |
|
---|
| 703 | if (buf_ptr[0] != '\0') {
|
---|
| 704 | bb_error_msg("too many parameters \"%s\"", buf);
|
---|
| 705 | return NULL;
|
---|
| 706 | }
|
---|
| 707 |
|
---|
| 708 | currif->iface = bb_xstrdup(iface_name);
|
---|
| 709 |
|
---|
| 710 | currif->address_family = get_address_family(addr_fams, address_family_name);
|
---|
| 711 | if (!currif->address_family) {
|
---|
| 712 | bb_error_msg("unknown address type \"%s\"", address_family_name);
|
---|
| 713 | return NULL;
|
---|
| 714 | }
|
---|
| 715 |
|
---|
| 716 | currif->method = get_method(currif->address_family, method_name);
|
---|
| 717 | if (!currif->method) {
|
---|
| 718 | bb_error_msg("unknown method \"%s\"", method_name);
|
---|
| 719 | return NULL;
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 |
|
---|
| 723 | {
|
---|
| 724 | llist_t *iface_list;
|
---|
| 725 | for (iface_list = defn->ifaces; iface_list; iface_list = iface_list->link) {
|
---|
| 726 | struct interface_defn_t *tmp = (struct interface_defn_t *) iface_list->data;
|
---|
| 727 | if ((strcmp(tmp->iface, currif->iface) == 0) &&
|
---|
| 728 | (tmp->address_family == currif->address_family)) {
|
---|
| 729 | bb_error_msg("duplicate interface \"%s\"", tmp->iface);
|
---|
| 730 | return NULL;
|
---|
| 731 | }
|
---|
| 732 | }
|
---|
| 733 |
|
---|
| 734 | llist_add_to_end(&(defn->ifaces), (char*)currif);
|
---|
| 735 | }
|
---|
| 736 | debug_noise("iface %s %s %s\n", currif->iface, address_family_name, method_name);
|
---|
| 737 | }
|
---|
| 738 | currently_processing = IFACE;
|
---|
| 739 | } else if (strcmp(firstword, "auto") == 0) {
|
---|
| 740 | while ((firstword = next_word(&buf_ptr)) != NULL) {
|
---|
| 741 |
|
---|
| 742 | /* Check the interface isnt already listed */
|
---|
| 743 | if (find_list_string(defn->autointerfaces, firstword)) {
|
---|
| 744 | bb_perror_msg_and_die("interface declared auto twice \"%s\"", buf);
|
---|
| 745 | }
|
---|
| 746 |
|
---|
| 747 | /* Add the interface to the list */
|
---|
| 748 | llist_add_to_end(&(defn->autointerfaces), bb_xstrdup(firstword));
|
---|
| 749 | debug_noise("\nauto %s\n", firstword);
|
---|
| 750 | }
|
---|
| 751 | currently_processing = NONE;
|
---|
| 752 | } else {
|
---|
| 753 | switch (currently_processing) {
|
---|
| 754 | case IFACE:
|
---|
| 755 | {
|
---|
| 756 | int i;
|
---|
| 757 |
|
---|
| 758 | if (strlen(buf_ptr) == 0) {
|
---|
| 759 | bb_error_msg("option with empty value \"%s\"", buf);
|
---|
| 760 | return NULL;
|
---|
| 761 | }
|
---|
| 762 |
|
---|
| 763 | if (strcmp(firstword, "up") != 0
|
---|
| 764 | && strcmp(firstword, "down") != 0
|
---|
| 765 | && strcmp(firstword, "pre-up") != 0
|
---|
| 766 | && strcmp(firstword, "post-down") != 0) {
|
---|
| 767 | for (i = 0; i < currif->n_options; i++) {
|
---|
| 768 | if (strcmp(currif->option[i].name, firstword) == 0) {
|
---|
| 769 | bb_error_msg("duplicate option \"%s\"", buf);
|
---|
| 770 | return NULL;
|
---|
| 771 | }
|
---|
| 772 | }
|
---|
| 773 | }
|
---|
| 774 | }
|
---|
| 775 | if (currif->n_options >= currif->max_options) {
|
---|
| 776 | struct variable_t *opt;
|
---|
| 777 |
|
---|
| 778 | currif->max_options = currif->max_options + 10;
|
---|
| 779 | opt = xrealloc(currif->option, sizeof(*opt) * currif->max_options);
|
---|
| 780 | currif->option = opt;
|
---|
| 781 | }
|
---|
| 782 | currif->option[currif->n_options].name = bb_xstrdup(firstword);
|
---|
| 783 | currif->option[currif->n_options].value = bb_xstrdup(buf_ptr);
|
---|
| 784 | if (!currif->option[currif->n_options].name) {
|
---|
| 785 | perror(filename);
|
---|
| 786 | return NULL;
|
---|
| 787 | }
|
---|
| 788 | if (!currif->option[currif->n_options].value) {
|
---|
| 789 | perror(filename);
|
---|
| 790 | return NULL;
|
---|
| 791 | }
|
---|
| 792 | debug_noise("\t%s=%s\n", currif->option[currif->n_options].name,
|
---|
| 793 | currif->option[currif->n_options].value);
|
---|
| 794 | currif->n_options++;
|
---|
| 795 | break;
|
---|
| 796 | case MAPPING:
|
---|
| 797 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 798 | if (strcmp(firstword, "script") == 0) {
|
---|
| 799 | if (currmap->script != NULL) {
|
---|
| 800 | bb_error_msg("duplicate script in mapping \"%s\"", buf);
|
---|
| 801 | return NULL;
|
---|
| 802 | } else {
|
---|
| 803 | currmap->script = bb_xstrdup(next_word(&buf_ptr));
|
---|
| 804 | }
|
---|
| 805 | } else if (strcmp(firstword, "map") == 0) {
|
---|
| 806 | if (currmap->max_mappings == currmap->n_mappings) {
|
---|
| 807 | currmap->max_mappings = currmap->max_mappings * 2 + 1;
|
---|
| 808 | currmap->mapping = xrealloc(currmap->mapping, sizeof(char *) * currmap->max_mappings);
|
---|
| 809 | }
|
---|
| 810 | currmap->mapping[currmap->n_mappings] = bb_xstrdup(next_word(&buf_ptr));
|
---|
| 811 | currmap->n_mappings++;
|
---|
| 812 | } else {
|
---|
| 813 | bb_error_msg("misplaced option \"%s\"", buf);
|
---|
| 814 | return NULL;
|
---|
| 815 | }
|
---|
| 816 | #endif
|
---|
| 817 | break;
|
---|
| 818 | case NONE:
|
---|
| 819 | default:
|
---|
| 820 | bb_error_msg("misplaced option \"%s\"", buf);
|
---|
| 821 | return NULL;
|
---|
| 822 | }
|
---|
| 823 | }
|
---|
| 824 | free(buf);
|
---|
| 825 | }
|
---|
| 826 | if (ferror(f) != 0) {
|
---|
| 827 | bb_perror_msg_and_die("%s", filename);
|
---|
| 828 | }
|
---|
| 829 | fclose(f);
|
---|
| 830 |
|
---|
| 831 | return defn;
|
---|
| 832 | }
|
---|
| 833 |
|
---|
| 834 | static char *setlocalenv(char *format, const char *name, const char *value)
|
---|
| 835 | {
|
---|
| 836 | char *result;
|
---|
| 837 | char *here;
|
---|
| 838 | char *there;
|
---|
| 839 |
|
---|
| 840 | result = bb_xasprintf(format, name, value);
|
---|
| 841 |
|
---|
| 842 | for (here = there = result; *there != '=' && *there; there++) {
|
---|
| 843 | if (*there == '-')
|
---|
| 844 | *there = '_';
|
---|
| 845 | if (isalpha(*there))
|
---|
| 846 | *there = toupper(*there);
|
---|
| 847 |
|
---|
| 848 | if (isalnum(*there) || *there == '_') {
|
---|
| 849 | *here = *there;
|
---|
| 850 | here++;
|
---|
| 851 | }
|
---|
| 852 | }
|
---|
| 853 | memmove(here, there, strlen(there) + 1);
|
---|
| 854 |
|
---|
| 855 | return result;
|
---|
| 856 | }
|
---|
| 857 |
|
---|
| 858 | static void set_environ(struct interface_defn_t *iface, const char *mode)
|
---|
| 859 | {
|
---|
| 860 | char **environend;
|
---|
| 861 | int i;
|
---|
| 862 | const int n_env_entries = iface->n_options + 5;
|
---|
| 863 | char **ppch;
|
---|
| 864 |
|
---|
| 865 | if (__myenviron != NULL) {
|
---|
| 866 | for (ppch = __myenviron; *ppch; ppch++) {
|
---|
| 867 | free(*ppch);
|
---|
| 868 | *ppch = NULL;
|
---|
| 869 | }
|
---|
| 870 | free(__myenviron);
|
---|
| 871 | }
|
---|
| 872 | __myenviron = xzalloc(sizeof(char *) * (n_env_entries + 1 /* for final NULL */ ));
|
---|
| 873 | environend = __myenviron;
|
---|
| 874 |
|
---|
| 875 | for (i = 0; i < iface->n_options; i++) {
|
---|
| 876 | if (strcmp(iface->option[i].name, "up") == 0
|
---|
| 877 | || strcmp(iface->option[i].name, "down") == 0
|
---|
| 878 | || strcmp(iface->option[i].name, "pre-up") == 0
|
---|
| 879 | || strcmp(iface->option[i].name, "post-down") == 0) {
|
---|
| 880 | continue;
|
---|
| 881 | }
|
---|
| 882 | *(environend++) = setlocalenv("IF_%s=%s", iface->option[i].name, iface->option[i].value);
|
---|
| 883 | }
|
---|
| 884 |
|
---|
| 885 | *(environend++) = setlocalenv("%s=%s", "IFACE", iface->iface);
|
---|
| 886 | *(environend++) = setlocalenv("%s=%s", "ADDRFAM", iface->address_family->name);
|
---|
| 887 | *(environend++) = setlocalenv("%s=%s", "METHOD", iface->method->name);
|
---|
| 888 | *(environend++) = setlocalenv("%s=%s", "MODE", mode);
|
---|
| 889 | *(environend++) = setlocalenv("%s=%s", "PATH", "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin");
|
---|
| 890 | }
|
---|
| 891 |
|
---|
| 892 | static int doit(char *str)
|
---|
| 893 | {
|
---|
| 894 | if (verbose || no_act) {
|
---|
| 895 | printf("%s\n", str);
|
---|
| 896 | }
|
---|
| 897 | if (!no_act) {
|
---|
| 898 | pid_t child;
|
---|
| 899 | int status;
|
---|
| 900 |
|
---|
| 901 | fflush(NULL);
|
---|
| 902 | switch (child = fork()) {
|
---|
| 903 | case -1: /* failure */
|
---|
| 904 | return 0;
|
---|
| 905 | case 0: /* child */
|
---|
| 906 | execle(DEFAULT_SHELL, DEFAULT_SHELL, "-c", str, NULL, __myenviron);
|
---|
| 907 | exit(127);
|
---|
| 908 | }
|
---|
| 909 | waitpid(child, &status, 0);
|
---|
| 910 | if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
|
---|
| 911 | return 0;
|
---|
| 912 | }
|
---|
| 913 | }
|
---|
| 914 | return (1);
|
---|
| 915 | }
|
---|
| 916 |
|
---|
| 917 | static int execute_all(struct interface_defn_t *ifd, const char *opt)
|
---|
| 918 | {
|
---|
| 919 | int i;
|
---|
| 920 | char *buf;
|
---|
| 921 | for (i = 0; i < ifd->n_options; i++) {
|
---|
| 922 | if (strcmp(ifd->option[i].name, opt) == 0) {
|
---|
| 923 | if (!doit(ifd->option[i].value)) {
|
---|
| 924 | return 0;
|
---|
| 925 | }
|
---|
| 926 | }
|
---|
| 927 | }
|
---|
| 928 |
|
---|
| 929 | buf = bb_xasprintf("run-parts /etc/network/if-%s.d", opt);
|
---|
| 930 | if (doit(buf) != 1) {
|
---|
| 931 | return 0;
|
---|
| 932 | }
|
---|
| 933 | return 1;
|
---|
| 934 | }
|
---|
| 935 |
|
---|
| 936 | static int check(char *str) {
|
---|
| 937 | return str != NULL;
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | static int iface_up(struct interface_defn_t *iface)
|
---|
| 941 | {
|
---|
| 942 | if (!iface->method->up(iface,check)) return -1;
|
---|
| 943 | set_environ(iface, "start");
|
---|
| 944 | if (!execute_all(iface, "pre-up")) return 0;
|
---|
| 945 | if (!iface->method->up(iface, doit)) return 0;
|
---|
| 946 | if (!execute_all(iface, "up")) return 0;
|
---|
| 947 | return 1;
|
---|
| 948 | }
|
---|
| 949 |
|
---|
| 950 | static int iface_down(struct interface_defn_t *iface)
|
---|
| 951 | {
|
---|
| 952 | if (!iface->method->down(iface,check)) return -1;
|
---|
| 953 | set_environ(iface, "stop");
|
---|
| 954 | if (!execute_all(iface, "down")) return 0;
|
---|
| 955 | if (!iface->method->down(iface, doit)) return 0;
|
---|
| 956 | if (!execute_all(iface, "post-down")) return 0;
|
---|
| 957 | return 1;
|
---|
| 958 | }
|
---|
| 959 |
|
---|
| 960 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 961 | static int popen2(FILE **in, FILE **out, char *command, ...)
|
---|
| 962 | {
|
---|
| 963 | va_list ap;
|
---|
| 964 | char *argv[11] = { command };
|
---|
| 965 | int argc;
|
---|
| 966 | int infd[2], outfd[2];
|
---|
| 967 | pid_t pid;
|
---|
| 968 |
|
---|
| 969 | argc = 1;
|
---|
| 970 | va_start(ap, command);
|
---|
| 971 | while ((argc < 10) && (argv[argc] = va_arg(ap, char *))) {
|
---|
| 972 | argc++;
|
---|
| 973 | }
|
---|
| 974 | argv[argc] = NULL; /* make sure */
|
---|
| 975 | va_end(ap);
|
---|
| 976 |
|
---|
| 977 | if (pipe(infd) != 0) {
|
---|
| 978 | return 0;
|
---|
| 979 | }
|
---|
| 980 |
|
---|
| 981 | if (pipe(outfd) != 0) {
|
---|
| 982 | close(infd[0]);
|
---|
| 983 | close(infd[1]);
|
---|
| 984 | return 0;
|
---|
| 985 | }
|
---|
| 986 |
|
---|
| 987 | fflush(NULL);
|
---|
| 988 | switch (pid = fork()) {
|
---|
| 989 | case -1: /* failure */
|
---|
| 990 | close(infd[0]);
|
---|
| 991 | close(infd[1]);
|
---|
| 992 | close(outfd[0]);
|
---|
| 993 | close(outfd[1]);
|
---|
| 994 | return 0;
|
---|
| 995 | case 0: /* child */
|
---|
| 996 | dup2(infd[0], 0);
|
---|
| 997 | dup2(outfd[1], 1);
|
---|
| 998 | close(infd[0]);
|
---|
| 999 | close(infd[1]);
|
---|
| 1000 | close(outfd[0]);
|
---|
| 1001 | close(outfd[1]);
|
---|
| 1002 | execvp(command, argv);
|
---|
| 1003 | exit(127);
|
---|
| 1004 | default: /* parent */
|
---|
| 1005 | *in = fdopen(infd[1], "w");
|
---|
| 1006 | *out = fdopen(outfd[0], "r");
|
---|
| 1007 | close(infd[0]);
|
---|
| 1008 | close(outfd[1]);
|
---|
| 1009 | return pid;
|
---|
| 1010 | }
|
---|
| 1011 | /* unreached */
|
---|
| 1012 | }
|
---|
| 1013 |
|
---|
| 1014 | static char *run_mapping(char *physical, struct mapping_defn_t * map)
|
---|
| 1015 | {
|
---|
| 1016 | FILE *in, *out;
|
---|
| 1017 | int i, status;
|
---|
| 1018 | pid_t pid;
|
---|
| 1019 |
|
---|
| 1020 | char *logical = bb_xstrdup(physical);
|
---|
| 1021 |
|
---|
| 1022 | /* Run the mapping script. */
|
---|
| 1023 | pid = popen2(&in, &out, map->script, physical, NULL);
|
---|
| 1024 |
|
---|
| 1025 | /* popen2() returns 0 on failure. */
|
---|
| 1026 | if (pid == 0)
|
---|
| 1027 | return logical;
|
---|
| 1028 |
|
---|
| 1029 | /* Write mappings to stdin of mapping script. */
|
---|
| 1030 | for (i = 0; i < map->n_mappings; i++) {
|
---|
| 1031 | fprintf(in, "%s\n", map->mapping[i]);
|
---|
| 1032 | }
|
---|
| 1033 | fclose(in);
|
---|
| 1034 | waitpid(pid, &status, 0);
|
---|
| 1035 |
|
---|
| 1036 | if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
|
---|
| 1037 | /* If the mapping script exited successfully, try to
|
---|
| 1038 | * grab a line of output and use that as the name of the
|
---|
| 1039 | * logical interface. */
|
---|
| 1040 | char *new_logical = (char *)xmalloc(MAX_INTERFACE_LENGTH);
|
---|
| 1041 |
|
---|
| 1042 | if (fgets(new_logical, MAX_INTERFACE_LENGTH, out)) {
|
---|
| 1043 | /* If we are able to read a line of output from the script,
|
---|
| 1044 | * remove any trailing whitespace and use this value
|
---|
| 1045 | * as the name of the logical interface. */
|
---|
| 1046 | char *pch = new_logical + strlen(new_logical) - 1;
|
---|
| 1047 |
|
---|
| 1048 | while (pch >= new_logical && isspace(*pch))
|
---|
| 1049 | *(pch--) = '\0';
|
---|
| 1050 |
|
---|
| 1051 | free(logical);
|
---|
| 1052 | logical = new_logical;
|
---|
| 1053 | } else {
|
---|
| 1054 | /* If we are UNABLE to read a line of output, discard our
|
---|
| 1055 | * freshly allocated memory. */
|
---|
| 1056 | free(new_logical);
|
---|
| 1057 | }
|
---|
| 1058 | }
|
---|
| 1059 |
|
---|
| 1060 | fclose(out);
|
---|
| 1061 |
|
---|
| 1062 | return logical;
|
---|
| 1063 | }
|
---|
| 1064 | #endif /* CONFIG_FEATURE_IFUPDOWN_MAPPING */
|
---|
| 1065 |
|
---|
| 1066 | static llist_t *find_iface_state(llist_t *state_list, const char *iface)
|
---|
| 1067 | {
|
---|
| 1068 | unsigned short iface_len = strlen(iface);
|
---|
| 1069 | llist_t *search = state_list;
|
---|
| 1070 |
|
---|
| 1071 | while (search) {
|
---|
| 1072 | if ((strncmp(search->data, iface, iface_len) == 0) &&
|
---|
| 1073 | (search->data[iface_len] == '=')) {
|
---|
| 1074 | return(search);
|
---|
| 1075 | }
|
---|
| 1076 | search = search->link;
|
---|
| 1077 | }
|
---|
| 1078 | return(NULL);
|
---|
| 1079 | }
|
---|
| 1080 |
|
---|
| 1081 | int ifupdown_main(int argc, char **argv)
|
---|
| 1082 | {
|
---|
| 1083 | int (*cmds) (struct interface_defn_t *) = NULL;
|
---|
| 1084 | struct interfaces_file_t *defn;
|
---|
| 1085 | llist_t *state_list = NULL;
|
---|
| 1086 | llist_t *target_list = NULL;
|
---|
| 1087 | const char *interfaces = "/etc/network/interfaces";
|
---|
| 1088 | const char *statefile = "/var/run/ifstate";
|
---|
| 1089 |
|
---|
| 1090 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 1091 | int run_mappings = 1;
|
---|
| 1092 | #endif
|
---|
| 1093 | int do_all = 0;
|
---|
| 1094 | int force = 0;
|
---|
| 1095 | int any_failures = 0;
|
---|
| 1096 | int i;
|
---|
| 1097 |
|
---|
| 1098 | if (bb_applet_name[2] == 'u') {
|
---|
| 1099 | /* ifup command */
|
---|
| 1100 | cmds = iface_up;
|
---|
| 1101 | } else {
|
---|
| 1102 | /* ifdown command */
|
---|
| 1103 | cmds = iface_down;
|
---|
| 1104 | }
|
---|
| 1105 |
|
---|
| 1106 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 1107 | while ((i = getopt(argc, argv, "i:hvnamf")) != -1)
|
---|
| 1108 | #else
|
---|
| 1109 | while ((i = getopt(argc, argv, "i:hvnaf")) != -1)
|
---|
| 1110 | #endif
|
---|
| 1111 | {
|
---|
| 1112 | switch (i) {
|
---|
| 1113 | case 'i': /* interfaces */
|
---|
| 1114 | interfaces = optarg;
|
---|
| 1115 | break;
|
---|
| 1116 | case 'v': /* verbose */
|
---|
| 1117 | verbose = 1;
|
---|
| 1118 | break;
|
---|
| 1119 | case 'a': /* all */
|
---|
| 1120 | do_all = 1;
|
---|
| 1121 | break;
|
---|
| 1122 | case 'n': /* no-act */
|
---|
| 1123 | no_act = 1;
|
---|
| 1124 | break;
|
---|
| 1125 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 1126 | case 'm': /* no-mappings */
|
---|
| 1127 | run_mappings = 0;
|
---|
| 1128 | break;
|
---|
| 1129 | #endif
|
---|
| 1130 | case 'f': /* force */
|
---|
| 1131 | force = 1;
|
---|
| 1132 | break;
|
---|
| 1133 | default:
|
---|
| 1134 | bb_show_usage();
|
---|
| 1135 | break;
|
---|
| 1136 | }
|
---|
| 1137 | }
|
---|
| 1138 |
|
---|
| 1139 | if (argc - optind > 0) {
|
---|
| 1140 | if (do_all) {
|
---|
| 1141 | bb_show_usage();
|
---|
| 1142 | }
|
---|
| 1143 | } else {
|
---|
| 1144 | if (!do_all) {
|
---|
| 1145 | bb_show_usage();
|
---|
| 1146 | }
|
---|
| 1147 | }
|
---|
| 1148 |
|
---|
| 1149 | debug_noise("reading %s file:\n", interfaces);
|
---|
| 1150 | defn = read_interfaces(interfaces);
|
---|
| 1151 | debug_noise("\ndone reading %s\n\n", interfaces);
|
---|
| 1152 |
|
---|
| 1153 | if (!defn) {
|
---|
| 1154 | exit(EXIT_FAILURE);
|
---|
| 1155 | }
|
---|
| 1156 |
|
---|
| 1157 | /* Create a list of interfaces to work on */
|
---|
| 1158 | if (do_all) {
|
---|
| 1159 | if (cmds == iface_up) {
|
---|
| 1160 | target_list = defn->autointerfaces;
|
---|
| 1161 | } else {
|
---|
| 1162 | /* iface_down */
|
---|
| 1163 | const llist_t *list = state_list;
|
---|
| 1164 | while (list) {
|
---|
| 1165 | llist_add_to_end(&target_list, bb_xstrdup(list->data));
|
---|
| 1166 | list = list->link;
|
---|
| 1167 | }
|
---|
| 1168 | target_list = defn->autointerfaces;
|
---|
| 1169 | }
|
---|
| 1170 | } else {
|
---|
| 1171 | llist_add_to_end(&target_list, argv[optind]);
|
---|
| 1172 | }
|
---|
| 1173 |
|
---|
| 1174 |
|
---|
| 1175 | /* Update the interfaces */
|
---|
| 1176 | while (target_list) {
|
---|
| 1177 | llist_t *iface_list;
|
---|
| 1178 | struct interface_defn_t *currif;
|
---|
| 1179 | char *iface;
|
---|
| 1180 | char *liface;
|
---|
| 1181 | char *pch;
|
---|
| 1182 | int okay = 0;
|
---|
| 1183 | int cmds_ret;
|
---|
| 1184 |
|
---|
| 1185 | iface = bb_xstrdup(target_list->data);
|
---|
| 1186 | target_list = target_list->link;
|
---|
| 1187 |
|
---|
| 1188 | pch = strchr(iface, '=');
|
---|
| 1189 | if (pch) {
|
---|
| 1190 | *pch = '\0';
|
---|
| 1191 | liface = bb_xstrdup(pch + 1);
|
---|
| 1192 | } else {
|
---|
| 1193 | liface = bb_xstrdup(iface);
|
---|
| 1194 | }
|
---|
| 1195 |
|
---|
| 1196 | if (!force) {
|
---|
| 1197 | const llist_t *iface_state = find_iface_state(state_list, iface);
|
---|
| 1198 |
|
---|
| 1199 | if (cmds == iface_up) {
|
---|
| 1200 | /* ifup */
|
---|
| 1201 | if (iface_state) {
|
---|
| 1202 | bb_error_msg("interface %s already configured", iface);
|
---|
| 1203 | continue;
|
---|
| 1204 | }
|
---|
| 1205 | } else {
|
---|
| 1206 | /* ifdown */
|
---|
| 1207 | if (iface_state) {
|
---|
| 1208 | bb_error_msg("interface %s not configured", iface);
|
---|
| 1209 | continue;
|
---|
| 1210 | }
|
---|
| 1211 | }
|
---|
| 1212 | }
|
---|
| 1213 |
|
---|
| 1214 | #ifdef CONFIG_FEATURE_IFUPDOWN_MAPPING
|
---|
| 1215 | if ((cmds == iface_up) && run_mappings) {
|
---|
| 1216 | struct mapping_defn_t *currmap;
|
---|
| 1217 |
|
---|
| 1218 | for (currmap = defn->mappings; currmap; currmap = currmap->next) {
|
---|
| 1219 |
|
---|
| 1220 | for (i = 0; i < currmap->n_matches; i++) {
|
---|
| 1221 | if (fnmatch(currmap->match[i], liface, 0) != 0)
|
---|
| 1222 | continue;
|
---|
| 1223 | if (verbose) {
|
---|
| 1224 | printf("Running mapping script %s on %s\n", currmap->script, liface);
|
---|
| 1225 | }
|
---|
| 1226 | liface = run_mapping(iface, currmap);
|
---|
| 1227 | break;
|
---|
| 1228 | }
|
---|
| 1229 | }
|
---|
| 1230 | }
|
---|
| 1231 | #endif
|
---|
| 1232 |
|
---|
| 1233 |
|
---|
| 1234 | iface_list = defn->ifaces;
|
---|
| 1235 | while (iface_list) {
|
---|
| 1236 | currif = (struct interface_defn_t *) iface_list->data;
|
---|
| 1237 | if (strcmp(liface, currif->iface) == 0) {
|
---|
| 1238 | char *oldiface = currif->iface;
|
---|
| 1239 |
|
---|
| 1240 | okay = 1;
|
---|
| 1241 | currif->iface = iface;
|
---|
| 1242 |
|
---|
| 1243 | debug_noise("\nConfiguring interface %s (%s)\n", liface, currif->address_family->name);
|
---|
| 1244 |
|
---|
| 1245 | /* Call the cmds function pointer, does either iface_up() or iface_down() */
|
---|
| 1246 | cmds_ret = cmds(currif);
|
---|
| 1247 | if (cmds_ret == -1) {
|
---|
| 1248 | bb_error_msg("Don't seem to have all the variables for %s/%s.",
|
---|
| 1249 | liface, currif->address_family->name);
|
---|
| 1250 | any_failures += 1;
|
---|
| 1251 | } else if (cmds_ret == 0) {
|
---|
| 1252 | any_failures += 1;
|
---|
| 1253 | }
|
---|
| 1254 |
|
---|
| 1255 | currif->iface = oldiface;
|
---|
| 1256 | }
|
---|
| 1257 | iface_list = iface_list->link;
|
---|
| 1258 | }
|
---|
| 1259 | if (verbose) {
|
---|
| 1260 | printf("\n");
|
---|
| 1261 | }
|
---|
| 1262 |
|
---|
| 1263 | if (!okay && !force) {
|
---|
| 1264 | bb_error_msg("Ignoring unknown interface %s", liface);
|
---|
| 1265 | any_failures += 1;
|
---|
| 1266 | } else {
|
---|
| 1267 | llist_t *iface_state = find_iface_state(state_list, iface);
|
---|
| 1268 |
|
---|
| 1269 | if (cmds == iface_up) {
|
---|
| 1270 | char *newiface = bb_xasprintf("%s=%s", iface, liface);
|
---|
| 1271 | if (iface_state == NULL) {
|
---|
| 1272 | llist_add_to_end(&state_list, newiface);
|
---|
| 1273 | } else {
|
---|
| 1274 | free(iface_state->data);
|
---|
| 1275 | iface_state->data = newiface;
|
---|
| 1276 | }
|
---|
| 1277 | } else {
|
---|
| 1278 | /* Remove an interface from the linked list */
|
---|
| 1279 | free(llist_pop(&iface_state));
|
---|
| 1280 | }
|
---|
| 1281 | }
|
---|
| 1282 | }
|
---|
| 1283 |
|
---|
| 1284 | /* Actually write the new state */
|
---|
| 1285 | if (!no_act) {
|
---|
| 1286 | FILE *state_fp = NULL;
|
---|
| 1287 |
|
---|
| 1288 | state_fp = bb_xfopen(statefile, "w");
|
---|
| 1289 | while (state_list) {
|
---|
| 1290 | if (state_list->data) {
|
---|
| 1291 | fputs(state_list->data, state_fp);
|
---|
| 1292 | fputc('\n', state_fp);
|
---|
| 1293 | }
|
---|
| 1294 | state_list = state_list->link;
|
---|
| 1295 | }
|
---|
| 1296 | fclose(state_fp);
|
---|
| 1297 | }
|
---|
| 1298 |
|
---|
| 1299 | if (any_failures)
|
---|
| 1300 | return 1;
|
---|
| 1301 | return 0;
|
---|
| 1302 | }
|
---|