[821] | 1 | /*
|
---|
| 2 | * utils.c
|
---|
| 3 | *
|
---|
| 4 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
| 5 | *
|
---|
| 6 | * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
|
---|
| 7 | *
|
---|
| 8 | * Changes:
|
---|
| 9 | *
|
---|
| 10 | * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
|
---|
| 11 | */
|
---|
| 12 |
|
---|
| 13 | #include "libbb.h"
|
---|
| 14 |
|
---|
| 15 | #include <string.h>
|
---|
| 16 | #include <unistd.h>
|
---|
| 17 |
|
---|
| 18 | #include "utils.h"
|
---|
| 19 | #include "inet_common.h"
|
---|
| 20 |
|
---|
| 21 | int get_integer(int *val, char *arg, int base)
|
---|
| 22 | {
|
---|
| 23 | long res;
|
---|
| 24 | char *ptr;
|
---|
| 25 |
|
---|
| 26 | if (!arg || !*arg)
|
---|
| 27 | return -1;
|
---|
| 28 | res = strtol(arg, &ptr, base);
|
---|
| 29 | if (!ptr || ptr == arg || *ptr || res > INT_MAX || res < INT_MIN)
|
---|
| 30 | return -1;
|
---|
| 31 | *val = res;
|
---|
| 32 | return 0;
|
---|
| 33 | }
|
---|
| 34 |
|
---|
| 35 | int get_unsigned(unsigned *val, char *arg, int base)
|
---|
| 36 | {
|
---|
| 37 | unsigned long res;
|
---|
| 38 | char *ptr;
|
---|
| 39 |
|
---|
| 40 | if (!arg || !*arg)
|
---|
| 41 | return -1;
|
---|
| 42 | res = strtoul(arg, &ptr, base);
|
---|
| 43 | if (!ptr || ptr == arg || *ptr || res > UINT_MAX)
|
---|
| 44 | return -1;
|
---|
| 45 | *val = res;
|
---|
| 46 | return 0;
|
---|
| 47 | }
|
---|
| 48 |
|
---|
| 49 | int get_u32(__u32 * val, char *arg, int base)
|
---|
| 50 | {
|
---|
| 51 | unsigned long res;
|
---|
| 52 | char *ptr;
|
---|
| 53 |
|
---|
| 54 | if (!arg || !*arg)
|
---|
| 55 | return -1;
|
---|
| 56 | res = strtoul(arg, &ptr, base);
|
---|
| 57 | if (!ptr || ptr == arg || *ptr || res > 0xFFFFFFFFUL)
|
---|
| 58 | return -1;
|
---|
| 59 | *val = res;
|
---|
| 60 | return 0;
|
---|
| 61 | }
|
---|
| 62 |
|
---|
| 63 | int get_u16(__u16 * val, char *arg, int base)
|
---|
| 64 | {
|
---|
| 65 | unsigned long res;
|
---|
| 66 | char *ptr;
|
---|
| 67 |
|
---|
| 68 | if (!arg || !*arg)
|
---|
| 69 | return -1;
|
---|
| 70 | res = strtoul(arg, &ptr, base);
|
---|
| 71 | if (!ptr || ptr == arg || *ptr || res > 0xFFFF)
|
---|
| 72 | return -1;
|
---|
| 73 | *val = res;
|
---|
| 74 | return 0;
|
---|
| 75 | }
|
---|
| 76 |
|
---|
| 77 | int get_u8(__u8 * val, char *arg, int base)
|
---|
| 78 | {
|
---|
| 79 | unsigned long res;
|
---|
| 80 | char *ptr;
|
---|
| 81 |
|
---|
| 82 | if (!arg || !*arg)
|
---|
| 83 | return -1;
|
---|
| 84 | res = strtoul(arg, &ptr, base);
|
---|
| 85 | if (!ptr || ptr == arg || *ptr || res > 0xFF)
|
---|
| 86 | return -1;
|
---|
| 87 | *val = res;
|
---|
| 88 | return 0;
|
---|
| 89 | }
|
---|
| 90 |
|
---|
| 91 | int get_s16(__s16 * val, char *arg, int base)
|
---|
| 92 | {
|
---|
| 93 | long res;
|
---|
| 94 | char *ptr;
|
---|
| 95 |
|
---|
| 96 | if (!arg || !*arg)
|
---|
| 97 | return -1;
|
---|
| 98 | res = strtol(arg, &ptr, base);
|
---|
| 99 | if (!ptr || ptr == arg || *ptr || res > 0x7FFF || res < -0x8000)
|
---|
| 100 | return -1;
|
---|
| 101 | *val = res;
|
---|
| 102 | return 0;
|
---|
| 103 | }
|
---|
| 104 |
|
---|
| 105 | int get_s8(__s8 * val, char *arg, int base)
|
---|
| 106 | {
|
---|
| 107 | long res;
|
---|
| 108 | char *ptr;
|
---|
| 109 |
|
---|
| 110 | if (!arg || !*arg)
|
---|
| 111 | return -1;
|
---|
| 112 | res = strtol(arg, &ptr, base);
|
---|
| 113 | if (!ptr || ptr == arg || *ptr || res > 0x7F || res < -0x80)
|
---|
| 114 | return -1;
|
---|
| 115 | *val = res;
|
---|
| 116 | return 0;
|
---|
| 117 | }
|
---|
| 118 |
|
---|
| 119 | int get_addr_1(inet_prefix * addr, char *name, int family)
|
---|
| 120 | {
|
---|
| 121 | char *cp;
|
---|
| 122 | unsigned char *ap = (unsigned char *) addr->data;
|
---|
| 123 | int i;
|
---|
| 124 |
|
---|
| 125 | memset(addr, 0, sizeof(*addr));
|
---|
| 126 |
|
---|
| 127 | if (strcmp(name, bb_INET_default) == 0 ||
|
---|
| 128 | strcmp(name, "all") == 0 || strcmp(name, "any") == 0) {
|
---|
| 129 | addr->family = family;
|
---|
| 130 | addr->bytelen = (family == AF_INET6 ? 16 : 4);
|
---|
| 131 | addr->bitlen = -1;
|
---|
| 132 | return 0;
|
---|
| 133 | }
|
---|
| 134 |
|
---|
| 135 | if (strchr(name, ':')) {
|
---|
| 136 | addr->family = AF_INET6;
|
---|
| 137 | if (family != AF_UNSPEC && family != AF_INET6)
|
---|
| 138 | return -1;
|
---|
| 139 | if (inet_pton(AF_INET6, name, addr->data) <= 0)
|
---|
| 140 | return -1;
|
---|
| 141 | addr->bytelen = 16;
|
---|
| 142 | addr->bitlen = -1;
|
---|
| 143 | return 0;
|
---|
| 144 | }
|
---|
| 145 |
|
---|
| 146 | addr->family = AF_INET;
|
---|
| 147 | if (family != AF_UNSPEC && family != AF_INET)
|
---|
| 148 | return -1;
|
---|
| 149 | addr->bytelen = 4;
|
---|
| 150 | addr->bitlen = -1;
|
---|
| 151 | for (cp = name, i = 0; *cp; cp++) {
|
---|
| 152 | if (*cp <= '9' && *cp >= '0') {
|
---|
| 153 | ap[i] = 10 * ap[i] + (*cp - '0');
|
---|
| 154 | continue;
|
---|
| 155 | }
|
---|
| 156 | if (*cp == '.' && ++i <= 3)
|
---|
| 157 | continue;
|
---|
| 158 | return -1;
|
---|
| 159 | }
|
---|
| 160 | return 0;
|
---|
| 161 | }
|
---|
| 162 |
|
---|
| 163 | int get_prefix_1(inet_prefix * dst, char *arg, int family)
|
---|
| 164 | {
|
---|
| 165 | int err;
|
---|
| 166 | int plen;
|
---|
| 167 | char *slash;
|
---|
| 168 |
|
---|
| 169 | memset(dst, 0, sizeof(*dst));
|
---|
| 170 |
|
---|
| 171 | if (strcmp(arg, bb_INET_default) == 0 || strcmp(arg, "any") == 0) {
|
---|
| 172 | dst->family = family;
|
---|
| 173 | dst->bytelen = 0;
|
---|
| 174 | dst->bitlen = 0;
|
---|
| 175 | return 0;
|
---|
| 176 | }
|
---|
| 177 |
|
---|
| 178 | slash = strchr(arg, '/');
|
---|
| 179 | if (slash)
|
---|
| 180 | *slash = 0;
|
---|
| 181 | err = get_addr_1(dst, arg, family);
|
---|
| 182 | if (err == 0) {
|
---|
| 183 | switch (dst->family) {
|
---|
| 184 | case AF_INET6:
|
---|
| 185 | dst->bitlen = 128;
|
---|
| 186 | break;
|
---|
| 187 | default:
|
---|
| 188 | case AF_INET:
|
---|
| 189 | dst->bitlen = 32;
|
---|
| 190 | }
|
---|
| 191 | if (slash) {
|
---|
| 192 | if (get_integer(&plen, slash + 1, 0) || plen > dst->bitlen) {
|
---|
| 193 | err = -1;
|
---|
| 194 | goto done;
|
---|
| 195 | }
|
---|
| 196 | dst->bitlen = plen;
|
---|
| 197 | }
|
---|
| 198 | }
|
---|
| 199 | done:
|
---|
| 200 | if (slash)
|
---|
| 201 | *slash = '/';
|
---|
| 202 | return err;
|
---|
| 203 | }
|
---|
| 204 |
|
---|
| 205 | int get_addr(inet_prefix * dst, char *arg, int family)
|
---|
| 206 | {
|
---|
| 207 | if (family == AF_PACKET) {
|
---|
| 208 | bb_error_msg_and_die("\"%s\" may be inet address, but it is not allowed in this context.", arg);
|
---|
| 209 | }
|
---|
| 210 | if (get_addr_1(dst, arg, family)) {
|
---|
| 211 | bb_error_msg_and_die("an inet address is expected rather than \"%s\".", arg);
|
---|
| 212 | }
|
---|
| 213 | return 0;
|
---|
| 214 | }
|
---|
| 215 |
|
---|
| 216 | int get_prefix(inet_prefix * dst, char *arg, int family)
|
---|
| 217 | {
|
---|
| 218 | if (family == AF_PACKET) {
|
---|
| 219 | bb_error_msg_and_die("\"%s\" may be inet address, but it is not allowed in this context.", arg);
|
---|
| 220 | }
|
---|
| 221 | if (get_prefix_1(dst, arg, family)) {
|
---|
| 222 | bb_error_msg_and_die("an inet address is expected rather than \"%s\".", arg);
|
---|
| 223 | }
|
---|
| 224 | return 0;
|
---|
| 225 | }
|
---|
| 226 |
|
---|
| 227 | __u32 get_addr32(char *name)
|
---|
| 228 | {
|
---|
| 229 | inet_prefix addr;
|
---|
| 230 |
|
---|
| 231 | if (get_addr_1(&addr, name, AF_INET)) {
|
---|
| 232 | bb_error_msg_and_die("an IP address is expected rather than \"%s\"", name);
|
---|
| 233 | }
|
---|
| 234 | return addr.data[0];
|
---|
| 235 | }
|
---|
| 236 |
|
---|
| 237 | void incomplete_command(void)
|
---|
| 238 | {
|
---|
| 239 | bb_error_msg("Command line is not complete. Try option \"help\"");
|
---|
| 240 | exit(-1);
|
---|
| 241 | }
|
---|
| 242 |
|
---|
| 243 | void invarg(const char * const arg, const char * const opt)
|
---|
| 244 | {
|
---|
| 245 | bb_error_msg(bb_msg_invalid_arg, arg, opt);
|
---|
| 246 | exit(-1);
|
---|
| 247 | }
|
---|
| 248 |
|
---|
| 249 | void duparg(char *key, char *arg)
|
---|
| 250 | {
|
---|
| 251 | bb_error_msg("duplicate \"%s\": \"%s\" is the second value.", key, arg);
|
---|
| 252 | exit(-1);
|
---|
| 253 | }
|
---|
| 254 |
|
---|
| 255 | void duparg2(char *key, char *arg)
|
---|
| 256 | {
|
---|
| 257 | bb_error_msg("either \"%s\" is duplicate, or \"%s\" is a garbage.", key, arg);
|
---|
| 258 | exit(-1);
|
---|
| 259 | }
|
---|
| 260 |
|
---|
| 261 | int matches(char *cmd, char *pattern)
|
---|
| 262 | {
|
---|
| 263 | int len = strlen(cmd);
|
---|
| 264 |
|
---|
| 265 | if (len > strlen(pattern)) {
|
---|
| 266 | return -1;
|
---|
| 267 | }
|
---|
| 268 | return memcmp(pattern, cmd, len);
|
---|
| 269 | }
|
---|
| 270 |
|
---|
| 271 | int inet_addr_match(inet_prefix * a, inet_prefix * b, int bits)
|
---|
| 272 | {
|
---|
| 273 | __u32 *a1 = a->data;
|
---|
| 274 | __u32 *a2 = b->data;
|
---|
| 275 | int words = bits >> 0x05;
|
---|
| 276 |
|
---|
| 277 | bits &= 0x1f;
|
---|
| 278 |
|
---|
| 279 | if (words)
|
---|
| 280 | if (memcmp(a1, a2, words << 2))
|
---|
| 281 | return -1;
|
---|
| 282 |
|
---|
| 283 | if (bits) {
|
---|
| 284 | __u32 w1, w2;
|
---|
| 285 | __u32 mask;
|
---|
| 286 |
|
---|
| 287 | w1 = a1[words];
|
---|
| 288 | w2 = a2[words];
|
---|
| 289 |
|
---|
| 290 | mask = htonl((0xffffffff) << (0x20 - bits));
|
---|
| 291 |
|
---|
| 292 | if ((w1 ^ w2) & mask)
|
---|
| 293 | return 1;
|
---|
| 294 | }
|
---|
| 295 |
|
---|
| 296 | return 0;
|
---|
| 297 | }
|
---|
| 298 |
|
---|
| 299 | int __iproute2_hz_internal;
|
---|
| 300 |
|
---|
| 301 | int __get_hz(void)
|
---|
| 302 | {
|
---|
| 303 | int hz = 0;
|
---|
| 304 | FILE *fp = fopen("/proc/net/psched", "r");
|
---|
| 305 |
|
---|
| 306 | if (fp) {
|
---|
| 307 | unsigned nom, denom;
|
---|
| 308 |
|
---|
| 309 | if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
|
---|
| 310 | if (nom == 1000000)
|
---|
| 311 | hz = denom;
|
---|
| 312 | fclose(fp);
|
---|
| 313 | }
|
---|
| 314 | if (hz)
|
---|
| 315 | return hz;
|
---|
| 316 | return sysconf(_SC_CLK_TCK);
|
---|
| 317 | }
|
---|
| 318 |
|
---|
| 319 | const char *rt_addr_n2a(int af, int ATTRIBUTE_UNUSED len,
|
---|
| 320 | void *addr, char *buf, int buflen)
|
---|
| 321 | {
|
---|
| 322 | switch (af) {
|
---|
| 323 | case AF_INET:
|
---|
| 324 | case AF_INET6:
|
---|
| 325 | return inet_ntop(af, addr, buf, buflen);
|
---|
| 326 | default:
|
---|
| 327 | return "???";
|
---|
| 328 | }
|
---|
| 329 | }
|
---|
| 330 |
|
---|
| 331 |
|
---|
| 332 | const char *format_host(int af, int len, void *addr, char *buf, int buflen)
|
---|
| 333 | {
|
---|
| 334 | #ifdef RESOLVE_HOSTNAMES
|
---|
| 335 | if (resolve_hosts) {
|
---|
| 336 | struct hostent *h_ent;
|
---|
| 337 |
|
---|
| 338 | if (len <= 0) {
|
---|
| 339 | switch (af) {
|
---|
| 340 | case AF_INET:
|
---|
| 341 | len = 4;
|
---|
| 342 | break;
|
---|
| 343 | case AF_INET6:
|
---|
| 344 | len = 16;
|
---|
| 345 | break;
|
---|
| 346 | default:;
|
---|
| 347 | }
|
---|
| 348 | }
|
---|
| 349 | if (len > 0 && (h_ent = gethostbyaddr(addr, len, af)) != NULL) {
|
---|
| 350 | snprintf(buf, buflen - 1, "%s", h_ent->h_name);
|
---|
| 351 | return buf;
|
---|
| 352 | }
|
---|
| 353 | }
|
---|
| 354 | #endif
|
---|
| 355 | return rt_addr_n2a(af, len, addr, buf, buflen);
|
---|
| 356 | }
|
---|