lib/utils.c

   1 /*
   2  * utils.c
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  *
  11  */
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <math.h>
  16 #include <unistd.h>
  17 #include <syslog.h>
  18 #include <fcntl.h>
  19 #include <limits.h>
  20 #include <sys/socket.h>
  21 #include <netinet/in.h>
  22 #include <string.h>
  23 #include <netdb.h>
  24 #include <arpa/inet.h>
  25 #include <asm/types.h>
  26 #include <linux/pkt_sched.h>
  27 #include <linux/param.h>
  28 #include <time.h>
  29 #include <sys/time.h>
  30 #include <errno.h>
  31
  32
  33 #include "utils.h"
  34 #include "namespace.h"
  35
  36 int timestamp_short = 0;
  37
  38 int get_integer(int *val, const char *arg, int base)
  39 {
  40         long res;
  41         char *ptr;
  42
  43         if (!arg || !*arg)
  44                 return -1;
  45
  46         res = strtol(arg, &ptr, base);
  47
  48         /* If there were no digits at all, strtol()  stores
  49          * the original value of nptr in *endptr (and returns 0).
  50          * In particular, if *nptr is not '\0' but **endptr is '\0' on return,
  51          * the entire string is valid.
  52          */
  53         if (!ptr || ptr == arg || *ptr)
  54                 return -1;
  55
  56         /* If an underflow occurs, strtol() returns LONG_MIN.
  57          * If an overflow occurs,  strtol() returns LONG_MAX.
  58          * In both cases, errno is set to ERANGE.
  59          */
  60         if ((res == LONG_MAX || res == LONG_MIN) && errno == ERANGE)
  61                 return -1;
  62
  63         /* Outside range of int */
  64         if (res < INT_MIN || res > INT_MAX)
  65                 return -1;
  66
  67         *val = res;
  68         return 0;
  69 }
  70
  71 int mask2bits(__u32 netmask)
  72 {
  73         unsigned bits = 0;
  74         __u32 mask = ntohl(netmask);
  75         __u32 host = ~mask;
  76
  77         /* a valid netmask must be 2^n - 1 */
  78         if ((host & (host + 1)) != 0)
  79                 return -1;
  80
  81         for (; mask; mask <<= 1)
  82                 ++bits;
  83         return bits;
  84 }
  85
  86 static int get_netmask(unsigned *val, const char *arg, int base)
  87 {
  88         inet_prefix addr;
  89
  90         if (!get_unsigned(val, arg, base))
  91                 return 0;
  92
  93         /* try coverting dotted quad to CIDR */
  94         if (!get_addr_1(&addr, arg, AF_INET) && addr.family == AF_INET) {
  95                 int b = mask2bits(addr.data[0]);
  96
  97                 if (b >= 0) {
  98                         *val = b;
  99                         return 0;
 100                 }
 101         }
 102
 103         return -1;
 104 }
 105
 106 int get_unsigned(unsigned *val, const char *arg, int base)
 107 {
 108         unsigned long res;
 109         char *ptr;
 110
 111         if (!arg || !*arg)
 112                 return -1;
 113
 114         res = strtoul(arg, &ptr, base);
 115
 116         /* empty string or trailing non-digits */
 117         if (!ptr || ptr == arg || *ptr)
 118                 return -1;
 119
 120         /* overflow */
 121         if (res == ULONG_MAX && errno == ERANGE)
 122                 return -1;
 123
 124         /* out side range of unsigned */
 125         if (res > UINT_MAX)
 126                 return -1;
 127
 128         *val = res;
 129         return 0;
 130 }
 131
 132 /*
 133  * get_time_rtt is "translated" from a similar routine "get_time" in
 134  * tc_util.c.  We don't use the exact same routine because tc passes
 135  * microseconds to the kernel and the callers of get_time_rtt want to
 136  * pass milliseconds (standard unit for rtt values since 2.6.27), and
 137  * have a different assumption for the units of a "raw" number.
 138  */
 139 int get_time_rtt(unsigned *val, const char *arg, int *raw)
 140 {
 141         double t;
 142         unsigned long res;
 143         char *p;
 144
 145         if (strchr(arg, '.') != NULL) {
 146                 t = strtod(arg, &p);
 147                 if (t < 0.0)
 148                         return -1;
 149
 150                 /* no digits? */
 151                 if (!p || p == arg)
 152                         return -1;
 153
 154                 /* over/underflow */
 155                 if ((t == HUGE_VALF || t == HUGE_VALL) && errno == ERANGE)
 156                         return -1;
 157         } else {
 158                 res = strtoul(arg, &p, 0);
 159
 160                 /* empty string? */
 161                 if (!p || p == arg)
 162                         return -1;
 163
 164                 /* overflow */
 165                 if (res == ULONG_MAX && errno == ERANGE)
 166                         return -1;
 167
 168                 t = (double)res;
 169         }
 170
 171         if (p == arg)
 172                 return -1;
 173         *raw = 1;
 174
 175         if (*p) {
 176                 *raw = 0;
 177                 if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 ||
 178                     strcasecmp(p, "secs")==0)
 179                         t *= 1000;
 180                 else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 ||
 181                          strcasecmp(p, "msecs") == 0)
 182                         t *= 1.0; /* allow suffix, do nothing */
 183                 else
 184                         return -1;
 185         }
 186
 187         /* emulate ceil() without having to bring-in -lm and always be >= 1 */
 188
 189         *val = t;
 190         if (*val < t)
 191                 *val += 1;
 192
 193         return 0;
 194
 195 }
 196
 197 int get_u64(__u64 *val, const char *arg, int base)
 198 {
 199         unsigned long long res;
 200         char *ptr;
 201
 202         if (!arg || !*arg)
 203                 return -1;
 204
 205         res = strtoull(arg, &ptr, base);
 206
 207         /* empty string or trailing non-digits */
 208         if (!ptr || ptr == arg || *ptr)
 209                 return -1;
 210
 211         /* overflow */
 212         if (res == ULLONG_MAX && errno == ERANGE)
 213                 return -1;
 214
 215         /* in case ULL is 128 bits */
 216         if (res > 0xFFFFFFFFFFFFFFFFULL)
 217                 return -1;
 218
 219         *val = res;
 220         return 0;
 221 }
 222
 223 int get_u32(__u32 *val, const char *arg, int base)
 224 {
 225         unsigned long res;
 226         char *ptr;
 227
 228         if (!arg || !*arg)
 229                 return -1;
 230         res = strtoul(arg, &ptr, base);
 231
 232         /* empty string or trailing non-digits */
 233         if (!ptr || ptr == arg || *ptr)
 234                 return -1;
 235
 236         /* overflow */
 237         if (res == ULONG_MAX && errno == ERANGE)
 238                 return -1;
 239
 240         /* in case UL > 32 bits */
 241         if (res > 0xFFFFFFFFUL)
 242                 return -1;
 243
 244         *val = res;
 245         return 0;
 246 }
 247
 248 int get_u16(__u16 *val, const char *arg, int base)
 249 {
 250         unsigned long res;
 251         char *ptr;
 252
 253         if (!arg || !*arg)
 254                 return -1;
 255         res = strtoul(arg, &ptr, base);
 256
 257         /* empty string or trailing non-digits */
 258         if (!ptr || ptr == arg || *ptr)
 259                 return -1;
 260
 261         /* overflow */
 262         if (res == ULONG_MAX && errno == ERANGE)
 263                 return -1;
 264
 265         if (res > 0xFFFFUL)
 266                 return -1;
 267
 268         *val = res;
 269         return 0;
 270 }
 271
 272 int get_u8(__u8 *val, const char *arg, int base)
 273 {
 274         unsigned long res;
 275         char *ptr;
 276
 277         if (!arg || !*arg)
 278                 return -1;
 279
 280         res = strtoul(arg, &ptr, base);
 281         /* empty string or trailing non-digits */
 282         if (!ptr || ptr == arg || *ptr)
 283                 return -1;
 284
 285         /* overflow */
 286         if (res == ULONG_MAX && errno == ERANGE)
 287                 return -1;
 288
 289         if (res > 0xFFUL)
 290                 return -1;
 291
 292         *val = res;
 293         return 0;
 294 }
 295
 296 int get_s32(__s32 *val, const char *arg, int base)
 297 {
 298         long res;
 299         char *ptr;
 300
 301         errno = 0;
 302
 303         if (!arg || !*arg)
 304                 return -1;
 305         res = strtol(arg, &ptr, base);
 306         if (!ptr || ptr == arg || *ptr)
 307                 return -1;
 308         if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE)
 309                 return -1;
 310         if (res > INT32_MAX || res < INT32_MIN)
 311                 return -1;
 312
 313         *val = res;
 314         return 0;
 315 }
 316
 317 int get_s16(__s16 *val, const char *arg, int base)
 318 {
 319         long res;
 320         char *ptr;
 321
 322         if (!arg || !*arg)
 323                 return -1;
 324         res = strtol(arg, &ptr, base);
 325         if (!ptr || ptr == arg || *ptr)
 326                 return -1;
 327         if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE)
 328                 return -1;
 329         if (res > 0x7FFF || res < -0x8000)
 330                 return -1;
 331
 332         *val = res;
 333         return 0;
 334 }
 335
 336 int get_s8(__s8 *val, const char *arg, int base)
 337 {
 338         long res;
 339         char *ptr;
 340
 341         if (!arg || !*arg)
 342                 return -1;
 343         res = strtol(arg, &ptr, base);
 344         if (!ptr || ptr == arg || *ptr)
 345                 return -1;
 346         if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE)
 347                 return -1;
 348         if (res > 0x7F || res < -0x80)
 349                 return -1;
 350         *val = res;
 351         return 0;
 352 }
 353
 354 /* This uses a non-standard parsing (ie not inet_aton, or inet_pton)
 355  * because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8
 356  */
 357 static int get_addr_ipv4(__u8 *ap, const char *cp)
 358 {
 359         int i;
 360
 361         for (i = 0; i < 4; i++) {
 362                 unsigned long n;
 363                 char *endp;
 364
 365                 n = strtoul(cp, &endp, 0);
 366                 if (n > 255)
 367                         return -1;      /* bogus network value */
 368
 369                 if (endp == cp) /* no digits */
 370                         return -1;
 371
 372                 ap[i] = n;
 373
 374                 if (*endp == '\0')
 375                         break;
 376
 377                 if (i == 3 || *endp != '.')
 378                         return -1;      /* extra characters */
 379                 cp = endp + 1;
 380         }
 381
 382         return 1;
 383 }
 384
 385 int get_addr_1(inet_prefix *addr, const char *name, int family)
 386 {
 387         memset(addr, 0, sizeof(*addr));
 388
 389         if (strcmp(name, "default") == 0 ||
 390             strcmp(name, "all") == 0 ||
 391             strcmp(name, "any") == 0) {
 392                 if (family == AF_DECnet)
 393                         return -1;
 394                 addr->family = family;
 395                 addr->bytelen = (family == AF_INET6 ? 16 : 4);
 396                 addr->bitlen = -1;
 397                 return 0;
 398         }
 399
 400         if (strchr(name, ':')) {
 401                 addr->family = AF_INET6;
 402                 if (family != AF_UNSPEC && family != AF_INET6)
 403                         return -1;
 404                 if (inet_pton(AF_INET6, name, addr->data) <= 0)
 405                         return -1;
 406                 addr->bytelen = 16;
 407                 addr->bitlen = -1;
 408                 return 0;
 409         }
 410
 411         if (family == AF_DECnet) {
 412                 struct dn_naddr dna;
 413                 addr->family = AF_DECnet;
 414                 if (dnet_pton(AF_DECnet, name, &dna) <= 0)
 415                         return -1;
 416                 memcpy(addr->data, dna.a_addr, 2);
 417                 addr->bytelen = 2;
 418                 addr->bitlen = -1;
 419                 return 0;
 420         }
 421
 422         addr->family = AF_INET;
 423         if (family != AF_UNSPEC && family != AF_INET)
 424                 return -1;
 425
 426         if (get_addr_ipv4((__u8 *)addr->data, name) <= 0)
 427                 return -1;
 428
 429         addr->bytelen = 4;
 430         addr->bitlen = -1;
 431         return 0;
 432 }
 433
 434 int af_bit_len(int af)
 435 {
 436         switch (af) {
 437         case AF_INET6:
 438                 return 128;
 439         case AF_INET:
 440                 return 32;
 441         case AF_DECnet:
 442                 return 16;
 443         case AF_IPX:
 444                 return 80;
 445         }
 446
 447         return 0;
 448 }
 449
 450 int af_byte_len(int af)
 451 {
 452         return af_bit_len(af) / 8;
 453 }
 454
 455 int get_prefix_1(inet_prefix *dst, char *arg, int family)
 456 {
 457         int err;
 458         unsigned plen;
 459         char *slash;
 460
 461         memset(dst, 0, sizeof(*dst));
 462
 463         if (strcmp(arg, "default") == 0 ||
 464             strcmp(arg, "any") == 0 ||
 465             strcmp(arg, "all") == 0) {
 466                 if (family == AF_DECnet)
 467                         return -1;
 468                 dst->family = family;
 469                 dst->bytelen = 0;
 470                 dst->bitlen = 0;
 471                 return 0;
 472         }
 473
 474         slash = strchr(arg, '/');
 475         if (slash)
 476                 *slash = 0;
 477
 478         err = get_addr_1(dst, arg, family);
 479         if (err == 0) {
 480                 dst->bitlen = af_bit_len(dst->family);
 481
 482                 if (slash) {
 483                         if (get_netmask(&plen, slash+1, 0)
 484                             || plen > dst->bitlen) {
 485                                 err = -1;
 486                                 goto done;
 487                         }
 488                         dst->flags |= PREFIXLEN_SPECIFIED;
 489                         dst->bitlen = plen;
 490                 }
 491         }
 492 done:
 493         if (slash)
 494                 *slash = '/';
 495         return err;
 496 }
 497
 498 int get_addr(inet_prefix *dst, const char *arg, int family)
 499 {
 500         if (family == AF_PACKET) {
 501                 fprintf(stderr, "Error: \"%s\" may be inet address, but it is not allowed in this context.\n", arg);
 502                 exit(1);
 503         }
 504         if (get_addr_1(dst, arg, family)) {
 505                 fprintf(stderr, "Error: an inet address is expected rather than \"%s\".\n", arg);
 506                 exit(1);
 507         }
 508         return 0;
 509 }
 510
 511 int get_prefix(inet_prefix *dst, char *arg, int family)
 512 {
 513         if (family == AF_PACKET) {
 514                 fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg);
 515                 exit(1);
 516         }
 517         if (get_prefix_1(dst, arg, family)) {
 518                 fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", arg);
 519                 exit(1);
 520         }
 521         return 0;
 522 }
 523
 524 __u32 get_addr32(const char *name)
 525 {
 526         inet_prefix addr;
 527         if (get_addr_1(&addr, name, AF_INET)) {
 528                 fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name);
 529                 exit(1);
 530         }
 531         return addr.data[0];
 532 }
 533
 534 void incomplete_command(void)
 535 {
 536         fprintf(stderr, "Command line is not complete. Try option \"help\"\n");
 537         exit(-1);
 538 }
 539
 540 void missarg(const char *key)
 541 {
 542         fprintf(stderr, "Error: argument \"%s\" is required\n", key);
 543         exit(-1);
 544 }
 545
 546 void invarg(const char *msg, const char *arg)
 547 {
 548         fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg);
 549         exit(-1);
 550 }
 551
 552 void duparg(const char *key, const char *arg)
 553 {
 554         fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg);
 555         exit(-1);
 556 }
 557
 558 void duparg2(const char *key, const char *arg)
 559 {
 560         fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg);
 561         exit(-1);
 562 }
 563
 564 int matches(const char *cmd, const char *pattern)
 565 {
 566         int len = strlen(cmd);
 567         if (len > strlen(pattern))
 568                 return -1;
 569         return memcmp(pattern, cmd, len);
 570 }
 571
 572 int inet_addr_match(const inet_prefix *a, const inet_prefix *b, int bits)
 573 {
 574         const __u32 *a1 = a->data;
 575         const __u32 *a2 = b->data;
 576         int words = bits >> 0x05;
 577
 578         bits &= 0x1f;
 579
 580         if (words)
 581                 if (memcmp(a1, a2, words << 2))
 582                         return -1;
 583
 584         if (bits) {
 585                 __u32 w1, w2;
 586                 __u32 mask;
 587
 588                 w1 = a1[words];
 589                 w2 = a2[words];
 590
 591                 mask = htonl((0xffffffff) << (0x20 - bits));
 592
 593                 if ((w1 ^ w2) & mask)
 594                         return 1;
 595         }
 596
 597         return 0;
 598 }
 599
 600 int __iproute2_hz_internal;
 601
 602 int __get_hz(void)
 603 {
 604         char name[1024];
 605         int hz = 0;
 606         FILE *fp;
 607
 608         if (getenv("HZ"))
 609                 return atoi(getenv("HZ")) ? : HZ;
 610
 611         if (getenv("PROC_NET_PSCHED")) {
 612                 snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED"));
 613         } else if (getenv("PROC_ROOT")) {
 614                 snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT"));
 615         } else {
 616                 strcpy(name, "/proc/net/psched");
 617         }
 618         fp = fopen(name, "r");
 619
 620         if (fp) {
 621                 unsigned nom, denom;
 622                 if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2)
 623                         if (nom == 1000000)
 624                                 hz = denom;
 625                 fclose(fp);
 626         }
 627         if (hz)
 628                 return hz;
 629         return HZ;
 630 }
 631
 632 int __iproute2_user_hz_internal;
 633
 634 int __get_user_hz(void)
 635 {
 636         return sysconf(_SC_CLK_TCK);
 637 }
 638
 639 const char *rt_addr_n2a(int af, int len, const void *addr, char *buf, int buflen)
 640 {
 641         switch (af) {
 642         case AF_INET:
 643         case AF_INET6:
 644                 return inet_ntop(af, addr, buf, buflen);
 645         case AF_IPX:
 646                 return ipx_ntop(af, addr, buf, buflen);
 647         case AF_DECnet:
 648         {
 649                 struct dn_naddr dna = { 2, { 0, 0, }};
 650                 memcpy(dna.a_addr, addr, 2);
 651                 return dnet_ntop(af, &dna, buf, buflen);
 652         }
 653         default:
 654                 return "???";
 655         }
 656 }
 657
 658 #ifdef RESOLVE_HOSTNAMES
 659 struct namerec
 660 {
 661         struct namerec *next;
 662         const char *name;
 663         inet_prefix addr;
 664 };
 665
 666 #define NHASH 257
 667 static struct namerec *nht[NHASH];
 668
 669 static const char *resolve_address(const void *addr, int len, int af)
 670 {
 671         struct namerec *n;
 672         struct hostent *h_ent;
 673         unsigned hash;
 674         static int notfirst;
 675
 676
 677         if (af == AF_INET6 && ((__u32*)addr)[0] == 0 &&
 678             ((__u32*)addr)[1] == 0 && ((__u32*)addr)[2] == htonl(0xffff)) {
 679                 af = AF_INET;
 680                 addr += 12;
 681                 len = 4;
 682         }
 683
 684         hash = *(__u32 *)(addr + len - 4) % NHASH;
 685
 686         for (n = nht[hash]; n; n = n->next) {
 687                 if (n->addr.family == af &&
 688                     n->addr.bytelen == len &&
 689                     memcmp(n->addr.data, addr, len) == 0)
 690                         return n->name;
 691         }
 692         if ((n = malloc(sizeof(*n))) == NULL)
 693                 return NULL;
 694         n->addr.family = af;
 695         n->addr.bytelen = len;
 696         n->name = NULL;
 697         memcpy(n->addr.data, addr, len);
 698         n->next = nht[hash];
 699         nht[hash] = n;
 700         if (++notfirst == 1)
 701                 sethostent(1);
 702         fflush(stdout);
 703
 704         if ((h_ent = gethostbyaddr(addr, len, af)) != NULL)
 705                 n->name = strdup(h_ent->h_name);
 706
 707         /* Even if we fail, "negative" entry is remembered. */
 708         return n->name;
 709 }
 710 #endif
 711
 712 const char *format_host(int af, int len, const void *addr,
 713                         char *buf, int buflen)
 714 {
 715 #ifdef RESOLVE_HOSTNAMES
 716         if (resolve_hosts) {
 717                 const char *n;
 718
 719                 len = len <= 0 ? af_byte_len(af) : len;
 720
 721                 if (len > 0 &&
 722                     (n = resolve_address(addr, len, af)) != NULL)
 723                         return n;
 724         }
 725 #endif
 726         return rt_addr_n2a(af, len, addr, buf, buflen);
 727 }
 728
 729
 730 char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen)
 731 {
 732         char *ptr = buf;
 733         int i;
 734
 735         for (i=0; i<len; i++) {
 736                 if (blen < 3)
 737                         break;
 738                 sprintf(ptr, "%02x", str[i]);
 739                 ptr += 2;
 740                 blen -= 2;
 741         }
 742         return buf;
 743 }
 744
 745 __u8* hexstring_a2n(const char *str, __u8 *buf, int blen)
 746 {
 747         int cnt = 0;
 748         char *endptr;
 749
 750         if (strlen(str) % 2)
 751                 return NULL;
 752         while (cnt < blen && strlen(str) > 1) {
 753                 unsigned int tmp;
 754                 char tmpstr[3];
 755
 756                 strncpy(tmpstr, str, 2);
 757                 tmpstr[2] = '\0';
 758                 tmp = strtoul(tmpstr, &endptr, 16);
 759                 if (errno != 0 || tmp > 0xFF || *endptr != '\0')
 760                         return NULL;
 761                 buf[cnt++] = tmp;
 762                 str += 2;
 763         }
 764         return buf;
 765 }
 766
 767 int print_timestamp(FILE *fp)
 768 {
 769         struct timeval tv;
 770         struct tm *tm;
 771
 772         gettimeofday(&tv, NULL);
 773         tm = localtime(&tv.tv_sec);
 774
 775         if (timestamp_short) {
 776                 char tshort[40];
 777
 778                 strftime(tshort, sizeof(tshort), "%Y-%m-%dT%H:%M:%S", tm);
 779                 fprintf(fp, "[%s.%06ld] ", tshort, tv.tv_usec);
 780         } else {
 781                 char *tstr = asctime(tm);
 782
 783                 tstr[strlen(tstr)-1] = 0;
 784                 fprintf(fp, "Timestamp: %s %ld usec\n",
 785                         tstr, tv.tv_usec);
 786         }
 787
 788         return 0;
 789 }
 790
 791 int cmdlineno;
 792
 793 /* Like glibc getline but handle continuation lines and comments */
 794 ssize_t getcmdline(char **linep, size_t *lenp, FILE *in)
 795 {
 796         ssize_t cc;
 797         char *cp;
 798
 799         if ((cc = getline(linep, lenp, in)) < 0)
 800                 return cc;      /* eof or error */
 801         ++cmdlineno;
 802
 803         cp = strchr(*linep, '#');
 804         if (cp)
 805                 *cp = '\0';
 806
 807         while ((cp = strstr(*linep, "\\\n")) != NULL) {
 808                 char *line1 = NULL;
 809                 size_t len1 = 0;
 810                 ssize_t cc1;
 811
 812                 if ((cc1 = getline(&line1, &len1, in)) < 0) {
 813                         fprintf(stderr, "Missing continuation line\n");
 814                         return cc1;
 815                 }
 816
 817                 ++cmdlineno;
 818                 *cp = 0;
 819
 820                 cp = strchr(line1, '#');
 821                 if (cp)
 822                         *cp = '\0';
 823
 824                 *lenp = strlen(*linep) + strlen(line1) + 1;
 825                 *linep = realloc(*linep, *lenp);
 826                 if (!*linep) {
 827                         fprintf(stderr, "Out of memory\n");
 828                         *lenp = 0;
 829                         return -1;
 830                 }
 831                 cc += cc1 - 2;
 832                 strcat(*linep, line1);
 833                 free(line1);
 834         }
 835         return cc;
 836 }
 837
 838 /* split command line into argument vector */
 839 int makeargs(char *line, char *argv[], int maxargs)
 840 {
 841         static const char ws[] = " \t\r\n";
 842         char *cp;
 843         int argc = 0;
 844
 845         for (cp = strtok(line, ws); cp; cp = strtok(NULL, ws)) {
 846                 if (argc >= (maxargs - 1)) {
 847                         fprintf(stderr, "Too many arguments to command\n");
 848                         exit(1);
 849                 }
 850                 argv[argc++] = cp;
 851         }
 852         argv[argc] = NULL;
 853
 854         return argc;
 855 }
 856
 857 int inet_get_addr(const char *src, __u32 *dst, struct in6_addr *dst6)
 858 {
 859         if (strchr(src, ':'))
 860                 return inet_pton(AF_INET6, src, dst6);
 861         else
 862                 return inet_pton(AF_INET, src, dst);
 863 }
 864
 865 void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n)
 866 {
 867         char *tstr;
 868         time_t secs = ((__u32*)NLMSG_DATA(n))[0];
 869         long usecs = ((__u32*)NLMSG_DATA(n))[1];
 870         tstr = asctime(localtime(&secs));
 871         tstr[strlen(tstr)-1] = 0;
 872         fprintf(fp, "Timestamp: %s %lu us\n", tstr, usecs);
 873 }
 874
 875 static int on_netns(char *nsname, void *arg)
 876 {
 877         struct netns_func *f = arg;
 878
 879         if (netns_switch(nsname))
 880                 return -1;
 881
 882         return f->func(nsname, f->arg);
 883 }
 884
 885 static int on_netns_label(char *nsname, void *arg)
 886 {
 887         printf("\nnetns: %s\n", nsname);
 888         return on_netns(nsname, arg);
 889 }
 890
 891 int do_each_netns(int (*func)(char *nsname, void *arg), void *arg,
 892                 bool show_label)
 893 {
 894         struct netns_func nsf = { .func = func, .arg = arg };
 895
 896         if (show_label)
 897                 return netns_foreach(on_netns_label, &nsf);
 898
 899         return netns_foreach(on_netns, &nsf);
 900 }
 901
 902 char *int_to_str(int val, char *buf)
 903 {
 904         sprintf(buf, "%d", val);
 905         return buf;
 906 }