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 (at) 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 <linux/if_arp.h> 29 #include <linux/mpls.h> 30 #include <time.h> 31 #include <sys/time.h> 32 #include <errno.h> 33 34 #include "rt_names.h" 35 #include "utils.h" 36 #include "namespace.h" 37 38 int timestamp_short = 0; 39 40 int get_integer(int *val, const char *arg, int base) 41 { 42 long res; 43 char *ptr; 44 45 if (!arg || !*arg) 46 return -1; 47 48 res = strtol(arg, &ptr, base); 49 50 /* If there were no digits at all, strtol() stores 51 * the original value of nptr in *endptr (and returns 0). 52 * In particular, if *nptr is not '\0' but **endptr is '\0' on return, 53 * the entire string is valid. 54 */ 55 if (!ptr || ptr == arg || *ptr) 56 return -1; 57 58 /* If an underflow occurs, strtol() returns LONG_MIN. 59 * If an overflow occurs, strtol() returns LONG_MAX. 60 * In both cases, errno is set to ERANGE. 61 */ 62 if ((res == LONG_MAX || res == LONG_MIN) && errno == ERANGE) 63 return -1; 64 65 /* Outside range of int */ 66 if (res < INT_MIN || res > INT_MAX) 67 return -1; 68 69 *val = res; 70 return 0; 71 } 72 73 int mask2bits(__u32 netmask) 74 { 75 unsigned bits = 0; 76 __u32 mask = ntohl(netmask); 77 __u32 host = ~mask; 78 79 /* a valid netmask must be 2^n - 1 */ 80 if ((host & (host + 1)) != 0) 81 return -1; 82 83 for (; mask; mask <<= 1) 84 ++bits; 85 return bits; 86 } 87 88 static int get_netmask(unsigned *val, const char *arg, int base) 89 { 90 inet_prefix addr; 91 92 if (!get_unsigned(val, arg, base)) 93 return 0; 94 95 /* try coverting dotted quad to CIDR */ 96 if (!get_addr_1(&addr, arg, AF_INET) && addr.family == AF_INET) { 97 int b = mask2bits(addr.data[0]); 98 99 if (b >= 0) { 100 *val = b; 101 return 0; 102 } 103 } 104 105 return -1; 106 } 107 108 int get_unsigned(unsigned *val, const char *arg, int base) 109 { 110 unsigned long res; 111 char *ptr; 112 113 if (!arg || !*arg) 114 return -1; 115 116 res = strtoul(arg, &ptr, base); 117 118 /* empty string or trailing non-digits */ 119 if (!ptr || ptr == arg || *ptr) 120 return -1; 121 122 /* overflow */ 123 if (res == ULONG_MAX && errno == ERANGE) 124 return -1; 125 126 /* out side range of unsigned */ 127 if (res > UINT_MAX) 128 return -1; 129 130 *val = res; 131 return 0; 132 } 133 134 /* 135 * get_time_rtt is "translated" from a similar routine "get_time" in 136 * tc_util.c. We don't use the exact same routine because tc passes 137 * microseconds to the kernel and the callers of get_time_rtt want to 138 * pass milliseconds (standard unit for rtt values since 2.6.27), and 139 * have a different assumption for the units of a "raw" number. 140 */ 141 int get_time_rtt(unsigned *val, const char *arg, int *raw) 142 { 143 double t; 144 unsigned long res; 145 char *p; 146 147 if (strchr(arg, '.') != NULL) { 148 t = strtod(arg, &p); 149 if (t < 0.0) 150 return -1; 151 152 /* no digits? */ 153 if (!p || p == arg) 154 return -1; 155 156 /* over/underflow */ 157 if ((t == HUGE_VALF || t == HUGE_VALL) && errno == ERANGE) 158 return -1; 159 } else { 160 res = strtoul(arg, &p, 0); 161 162 /* empty string? */ 163 if (!p || p == arg) 164 return -1; 165 166 /* overflow */ 167 if (res == ULONG_MAX && errno == ERANGE) 168 return -1; 169 170 t = (double)res; 171 } 172 173 if (p == arg) 174 return -1; 175 *raw = 1; 176 177 if (*p) { 178 *raw = 0; 179 if (strcasecmp(p, "s") == 0 || strcasecmp(p, "sec")==0 || 180 strcasecmp(p, "secs")==0) 181 t *= 1000; 182 else if (strcasecmp(p, "ms") == 0 || strcasecmp(p, "msec")==0 || 183 strcasecmp(p, "msecs") == 0) 184 t *= 1.0; /* allow suffix, do nothing */ 185 else 186 return -1; 187 } 188 189 /* emulate ceil() without having to bring-in -lm and always be >= 1 */ 190 191 *val = t; 192 if (*val < t) 193 *val += 1; 194 195 return 0; 196 197 } 198 199 int get_u64(__u64 *val, const char *arg, int base) 200 { 201 unsigned long long res; 202 char *ptr; 203 204 if (!arg || !*arg) 205 return -1; 206 207 res = strtoull(arg, &ptr, base); 208 209 /* empty string or trailing non-digits */ 210 if (!ptr || ptr == arg || *ptr) 211 return -1; 212 213 /* overflow */ 214 if (res == ULLONG_MAX && errno == ERANGE) 215 return -1; 216 217 /* in case ULL is 128 bits */ 218 if (res > 0xFFFFFFFFFFFFFFFFULL) 219 return -1; 220 221 *val = res; 222 return 0; 223 } 224 225 int get_u32(__u32 *val, const char *arg, int base) 226 { 227 unsigned long res; 228 char *ptr; 229 230 if (!arg || !*arg) 231 return -1; 232 res = strtoul(arg, &ptr, base); 233 234 /* empty string or trailing non-digits */ 235 if (!ptr || ptr == arg || *ptr) 236 return -1; 237 238 /* overflow */ 239 if (res == ULONG_MAX && errno == ERANGE) 240 return -1; 241 242 /* in case UL > 32 bits */ 243 if (res > 0xFFFFFFFFUL) 244 return -1; 245 246 *val = res; 247 return 0; 248 } 249 250 int get_u16(__u16 *val, const char *arg, int base) 251 { 252 unsigned long res; 253 char *ptr; 254 255 if (!arg || !*arg) 256 return -1; 257 res = strtoul(arg, &ptr, base); 258 259 /* empty string or trailing non-digits */ 260 if (!ptr || ptr == arg || *ptr) 261 return -1; 262 263 /* overflow */ 264 if (res == ULONG_MAX && errno == ERANGE) 265 return -1; 266 267 if (res > 0xFFFFUL) 268 return -1; 269 270 *val = res; 271 return 0; 272 } 273 274 int get_u8(__u8 *val, const char *arg, int base) 275 { 276 unsigned long res; 277 char *ptr; 278 279 if (!arg || !*arg) 280 return -1; 281 282 res = strtoul(arg, &ptr, base); 283 /* empty string or trailing non-digits */ 284 if (!ptr || ptr == arg || *ptr) 285 return -1; 286 287 /* overflow */ 288 if (res == ULONG_MAX && errno == ERANGE) 289 return -1; 290 291 if (res > 0xFFUL) 292 return -1; 293 294 *val = res; 295 return 0; 296 } 297 298 int get_s32(__s32 *val, const char *arg, int base) 299 { 300 long res; 301 char *ptr; 302 303 errno = 0; 304 305 if (!arg || !*arg) 306 return -1; 307 res = strtol(arg, &ptr, base); 308 if (!ptr || ptr == arg || *ptr) 309 return -1; 310 if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE) 311 return -1; 312 if (res > INT32_MAX || res < INT32_MIN) 313 return -1; 314 315 *val = res; 316 return 0; 317 } 318 319 int get_s16(__s16 *val, const char *arg, int base) 320 { 321 long res; 322 char *ptr; 323 324 if (!arg || !*arg) 325 return -1; 326 res = strtol(arg, &ptr, base); 327 if (!ptr || ptr == arg || *ptr) 328 return -1; 329 if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE) 330 return -1; 331 if (res > 0x7FFF || res < -0x8000) 332 return -1; 333 334 *val = res; 335 return 0; 336 } 337 338 int get_s8(__s8 *val, const char *arg, int base) 339 { 340 long res; 341 char *ptr; 342 343 if (!arg || !*arg) 344 return -1; 345 res = strtol(arg, &ptr, base); 346 if (!ptr || ptr == arg || *ptr) 347 return -1; 348 if ((res == LONG_MIN || res == LONG_MAX) && errno == ERANGE) 349 return -1; 350 if (res > 0x7F || res < -0x80) 351 return -1; 352 *val = res; 353 return 0; 354 } 355 356 /* This uses a non-standard parsing (ie not inet_aton, or inet_pton) 357 * because of legacy choice to parse 10.8 as 10.8.0.0 not 10.0.0.8 358 */ 359 static int get_addr_ipv4(__u8 *ap, const char *cp) 360 { 361 int i; 362 363 for (i = 0; i < 4; i++) { 364 unsigned long n; 365 char *endp; 366 367 n = strtoul(cp, &endp, 0); 368 if (n > 255) 369 return -1; /* bogus network value */ 370 371 if (endp == cp) /* no digits */ 372 return -1; 373 374 ap[i] = n; 375 376 if (*endp == '\0') 377 break; 378 379 if (i == 3 || *endp != '.') 380 return -1; /* extra characters */ 381 cp = endp + 1; 382 } 383 384 return 1; 385 } 386 387 int get_addr64(__u64 *ap, const char *cp) 388 { 389 int i; 390 391 union { 392 __u16 v16[4]; 393 __u64 v64; 394 } val; 395 396 for (i = 0; i < 4; i++) { 397 unsigned long n; 398 char *endp; 399 400 n = strtoul(cp, &endp, 16); 401 if (n > 0xffff) 402 return -1; /* bogus network value */ 403 404 if (endp == cp) /* no digits */ 405 return -1; 406 407 val.v16[i] = htons(n); 408 409 if (*endp == '\0') 410 break; 411 412 if (i == 3 || *endp != ':') 413 return -1; /* extra characters */ 414 cp = endp + 1; 415 } 416 417 *ap = val.v64; 418 419 return 1; 420 } 421 422 int get_addr_1(inet_prefix *addr, const char *name, int family) 423 { 424 memset(addr, 0, sizeof(*addr)); 425 426 if (strcmp(name, "default") == 0 || 427 strcmp(name, "all") == 0 || 428 strcmp(name, "any") == 0) { 429 if ((family == AF_DECnet) || (family == AF_MPLS)) 430 return -1; 431 addr->family = family; 432 addr->bytelen = (family == AF_INET6 ? 16 : 4); 433 addr->bitlen = -1; 434 return 0; 435 } 436 437 if (family == AF_PACKET) { 438 int len; 439 len = ll_addr_a2n((char *)&addr->data, sizeof(addr->data), name); 440 if (len < 0) 441 return -1; 442 443 addr->family = AF_PACKET; 444 addr->bytelen = len; 445 addr->bitlen = len * 8; 446 return 0; 447 } 448 449 if (strchr(name, ':')) { 450 addr->family = AF_INET6; 451 if (family != AF_UNSPEC && family != AF_INET6) 452 return -1; 453 if (inet_pton(AF_INET6, name, addr->data) <= 0) 454 return -1; 455 addr->bytelen = 16; 456 addr->bitlen = -1; 457 return 0; 458 } 459 460 #ifndef ANDROID 461 if (family == AF_DECnet) { 462 struct dn_naddr dna; 463 addr->family = AF_DECnet; 464 if (dnet_pton(AF_DECnet, name, &dna) <= 0) 465 return -1; 466 memcpy(addr->data, dna.a_addr, 2); 467 addr->bytelen = 2; 468 addr->bitlen = -1; 469 return 0; 470 } 471 #endif 472 473 if (family == AF_MPLS) { 474 int i; 475 addr->family = AF_MPLS; 476 if (mpls_pton(AF_MPLS, name, addr->data) <= 0) 477 return -1; 478 addr->bytelen = 4; 479 addr->bitlen = 20; 480 /* How many bytes do I need? */ 481 for (i = 0; i < 8; i++) { 482 if (ntohl(addr->data[i]) & MPLS_LS_S_MASK) { 483 addr->bytelen = (i + 1)*4; 484 break; 485 } 486 } 487 return 0; 488 } 489 490 addr->family = AF_INET; 491 if (family != AF_UNSPEC && family != AF_INET) 492 return -1; 493 494 if (get_addr_ipv4((__u8 *)addr->data, name) <= 0) 495 return -1; 496 497 addr->bytelen = 4; 498 addr->bitlen = -1; 499 return 0; 500 } 501 502 int af_bit_len(int af) 503 { 504 switch (af) { 505 case AF_INET6: 506 return 128; 507 case AF_INET: 508 return 32; 509 case AF_DECnet: 510 return 16; 511 case AF_IPX: 512 return 80; 513 case AF_MPLS: 514 return 20; 515 } 516 517 return 0; 518 } 519 520 int af_byte_len(int af) 521 { 522 return af_bit_len(af) / 8; 523 } 524 525 int get_prefix_1(inet_prefix *dst, char *arg, int family) 526 { 527 int err; 528 unsigned plen; 529 char *slash; 530 531 memset(dst, 0, sizeof(*dst)); 532 533 if (strcmp(arg, "default") == 0 || 534 strcmp(arg, "any") == 0 || 535 strcmp(arg, "all") == 0) { 536 if ((family == AF_DECnet) || (family == AF_MPLS)) 537 return -1; 538 dst->family = family; 539 dst->bytelen = 0; 540 dst->bitlen = 0; 541 return 0; 542 } 543 544 slash = strchr(arg, '/'); 545 if (slash) 546 *slash = 0; 547 548 err = get_addr_1(dst, arg, family); 549 if (err == 0) { 550 dst->bitlen = af_bit_len(dst->family); 551 552 if (slash) { 553 if (get_netmask(&plen, slash+1, 0) 554 || plen > dst->bitlen) { 555 err = -1; 556 goto done; 557 } 558 dst->flags |= PREFIXLEN_SPECIFIED; 559 dst->bitlen = plen; 560 } 561 } 562 done: 563 if (slash) 564 *slash = '/'; 565 return err; 566 } 567 568 int get_addr(inet_prefix *dst, const char *arg, int family) 569 { 570 if (get_addr_1(dst, arg, family)) { 571 fprintf(stderr, "Error: %s address is expected rather than \"%s\".\n", 572 family_name(family) ,arg); 573 exit(1); 574 } 575 return 0; 576 } 577 578 int get_prefix(inet_prefix *dst, char *arg, int family) 579 { 580 if (family == AF_PACKET) { 581 fprintf(stderr, "Error: \"%s\" may be inet prefix, but it is not allowed in this context.\n", arg); 582 exit(1); 583 } 584 if (get_prefix_1(dst, arg, family)) { 585 fprintf(stderr, "Error: %s prefix is expected rather than \"%s\".\n", 586 family_name(family) ,arg); 587 exit(1); 588 } 589 return 0; 590 } 591 592 __u32 get_addr32(const char *name) 593 { 594 inet_prefix addr; 595 if (get_addr_1(&addr, name, AF_INET)) { 596 fprintf(stderr, "Error: an IP address is expected rather than \"%s\"\n", name); 597 exit(1); 598 } 599 return addr.data[0]; 600 } 601 602 void incomplete_command(void) 603 { 604 fprintf(stderr, "Command line is not complete. Try option \"help\"\n"); 605 exit(-1); 606 } 607 608 void missarg(const char *key) 609 { 610 fprintf(stderr, "Error: argument \"%s\" is required\n", key); 611 exit(-1); 612 } 613 614 void invarg(const char *msg, const char *arg) 615 { 616 fprintf(stderr, "Error: argument \"%s\" is wrong: %s\n", arg, msg); 617 exit(-1); 618 } 619 620 void duparg(const char *key, const char *arg) 621 { 622 fprintf(stderr, "Error: duplicate \"%s\": \"%s\" is the second value.\n", key, arg); 623 exit(-1); 624 } 625 626 void duparg2(const char *key, const char *arg) 627 { 628 fprintf(stderr, "Error: either \"%s\" is duplicate, or \"%s\" is a garbage.\n", key, arg); 629 exit(-1); 630 } 631 632 int matches(const char *cmd, const char *pattern) 633 { 634 int len = strlen(cmd); 635 if (len > strlen(pattern)) 636 return -1; 637 return memcmp(pattern, cmd, len); 638 } 639 640 int inet_addr_match(const inet_prefix *a, const inet_prefix *b, int bits) 641 { 642 const __u32 *a1 = a->data; 643 const __u32 *a2 = b->data; 644 int words = bits >> 0x05; 645 646 bits &= 0x1f; 647 648 if (words) 649 if (memcmp(a1, a2, words << 2)) 650 return -1; 651 652 if (bits) { 653 __u32 w1, w2; 654 __u32 mask; 655 656 w1 = a1[words]; 657 w2 = a2[words]; 658 659 mask = htonl((0xffffffff) << (0x20 - bits)); 660 661 if ((w1 ^ w2) & mask) 662 return 1; 663 } 664 665 return 0; 666 } 667 668 int __iproute2_hz_internal; 669 670 int __get_hz(void) 671 { 672 char name[1024]; 673 int hz = 0; 674 FILE *fp; 675 676 if (getenv("HZ")) 677 return atoi(getenv("HZ")) ? : HZ; 678 679 if (getenv("PROC_NET_PSCHED")) { 680 snprintf(name, sizeof(name)-1, "%s", getenv("PROC_NET_PSCHED")); 681 } else if (getenv("PROC_ROOT")) { 682 snprintf(name, sizeof(name)-1, "%s/net/psched", getenv("PROC_ROOT")); 683 } else { 684 strcpy(name, "/proc/net/psched"); 685 } 686 fp = fopen(name, "r"); 687 688 if (fp) { 689 unsigned nom, denom; 690 if (fscanf(fp, "%*08x%*08x%08x%08x", &nom, &denom) == 2) 691 if (nom == 1000000) 692 hz = denom; 693 fclose(fp); 694 } 695 if (hz) 696 return hz; 697 return HZ; 698 } 699 700 int __iproute2_user_hz_internal; 701 702 int __get_user_hz(void) 703 { 704 return sysconf(_SC_CLK_TCK); 705 } 706 707 const char *rt_addr_n2a(int af, int len, const void *addr, char *buf, int buflen) 708 { 709 switch (af) { 710 case AF_INET: 711 case AF_INET6: 712 return inet_ntop(af, addr, buf, buflen); 713 #ifndef ANDROID 714 case AF_MPLS: 715 return mpls_ntop(af, addr, buf, buflen); 716 case AF_IPX: 717 return ipx_ntop(af, addr, buf, buflen); 718 case AF_DECnet: 719 { 720 struct dn_naddr dna = { 2, { 0, 0, }}; 721 memcpy(dna.a_addr, addr, 2); 722 return dnet_ntop(af, &dna, buf, buflen); 723 } 724 #endif 725 case AF_PACKET: 726 return ll_addr_n2a(addr, len, ARPHRD_VOID, buf, buflen); 727 default: 728 return "???"; 729 } 730 } 731 732 int read_family(const char *name) 733 { 734 int family = AF_UNSPEC; 735 if (strcmp(name, "inet") == 0) 736 family = AF_INET; 737 else if (strcmp(name, "inet6") == 0) 738 family = AF_INET6; 739 else if (strcmp(name, "dnet") == 0) 740 family = AF_DECnet; 741 else if (strcmp(name, "link") == 0) 742 family = AF_PACKET; 743 else if (strcmp(name, "ipx") == 0) 744 family = AF_IPX; 745 else if (strcmp(name, "mpls") == 0) 746 family = AF_MPLS; 747 else if (strcmp(name, "bridge") == 0) 748 family = AF_BRIDGE; 749 return family; 750 } 751 752 const char *family_name(int family) 753 { 754 if (family == AF_INET) 755 return "inet"; 756 if (family == AF_INET6) 757 return "inet6"; 758 if (family == AF_DECnet) 759 return "dnet"; 760 if (family == AF_PACKET) 761 return "link"; 762 if (family == AF_IPX) 763 return "ipx"; 764 if (family == AF_MPLS) 765 return "mpls"; 766 if (family == AF_BRIDGE) 767 return "bridge"; 768 return "???"; 769 } 770 771 #ifdef RESOLVE_HOSTNAMES 772 struct namerec 773 { 774 struct namerec *next; 775 const char *name; 776 inet_prefix addr; 777 }; 778 779 #define NHASH 257 780 static struct namerec *nht[NHASH]; 781 782 static const char *resolve_address(const void *addr, int len, int af) 783 { 784 struct namerec *n; 785 struct hostent *h_ent; 786 unsigned hash; 787 static int notfirst; 788 789 790 if (af == AF_INET6 && ((__u32*)addr)[0] == 0 && 791 ((__u32*)addr)[1] == 0 && ((__u32*)addr)[2] == htonl(0xffff)) { 792 af = AF_INET; 793 addr += 12; 794 len = 4; 795 } 796 797 hash = *(__u32 *)(addr + len - 4) % NHASH; 798 799 for (n = nht[hash]; n; n = n->next) { 800 if (n->addr.family == af && 801 n->addr.bytelen == len && 802 memcmp(n->addr.data, addr, len) == 0) 803 return n->name; 804 } 805 if ((n = malloc(sizeof(*n))) == NULL) 806 return NULL; 807 n->addr.family = af; 808 n->addr.bytelen = len; 809 n->name = NULL; 810 memcpy(n->addr.data, addr, len); 811 n->next = nht[hash]; 812 nht[hash] = n; 813 if (++notfirst == 1) 814 sethostent(1); 815 fflush(stdout); 816 817 if ((h_ent = gethostbyaddr(addr, len, af)) != NULL) 818 n->name = strdup(h_ent->h_name); 819 820 /* Even if we fail, "negative" entry is remembered. */ 821 return n->name; 822 } 823 #endif 824 825 const char *format_host(int af, int len, const void *addr, 826 char *buf, int buflen) 827 { 828 #ifdef RESOLVE_HOSTNAMES 829 if (resolve_hosts) { 830 const char *n; 831 832 len = len <= 0 ? af_byte_len(af) : len; 833 834 if (len > 0 && 835 (n = resolve_address(addr, len, af)) != NULL) 836 return n; 837 } 838 #endif 839 return rt_addr_n2a(af, len, addr, buf, buflen); 840 } 841 842 843 char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen) 844 { 845 char *ptr = buf; 846 int i; 847 848 for (i=0; i<len; i++) { 849 if (blen < 3) 850 break; 851 sprintf(ptr, "%02x", str[i]); 852 ptr += 2; 853 blen -= 2; 854 } 855 return buf; 856 } 857 858 __u8* hexstring_a2n(const char *str, __u8 *buf, int blen) 859 { 860 int cnt = 0; 861 char *endptr; 862 863 if (strlen(str) % 2) 864 return NULL; 865 while (cnt < blen && strlen(str) > 1) { 866 unsigned int tmp; 867 char tmpstr[3]; 868 869 strncpy(tmpstr, str, 2); 870 tmpstr[2] = '\0'; 871 tmp = strtoul(tmpstr, &endptr, 16); 872 if (errno != 0 || tmp > 0xFF || *endptr != '\0') 873 return NULL; 874 buf[cnt++] = tmp; 875 str += 2; 876 } 877 return buf; 878 } 879 880 int addr64_n2a(__u64 addr, char *buff, size_t len) 881 { 882 __u16 *words = (__u16 *)&addr; 883 __u16 v; 884 int i, ret; 885 size_t written = 0; 886 char *sep = ":"; 887 888 for (i = 0; i < 4; i++) { 889 v = ntohs(words[i]); 890 891 if (i == 3) 892 sep = ""; 893 894 ret = snprintf(&buff[written], len - written, "%x%s", v, sep); 895 if (ret < 0) 896 return ret; 897 898 written += ret; 899 } 900 901 return written; 902 } 903 904 int print_timestamp(FILE *fp) 905 { 906 struct timeval tv; 907 struct tm *tm; 908 909 gettimeofday(&tv, NULL); 910 tm = localtime(&tv.tv_sec); 911 912 if (timestamp_short) { 913 char tshort[40]; 914 915 strftime(tshort, sizeof(tshort), "%Y-%m-%dT%H:%M:%S", tm); 916 fprintf(fp, "[%s.%06ld] ", tshort, tv.tv_usec); 917 } else { 918 char *tstr = asctime(tm); 919 920 tstr[strlen(tstr)-1] = 0; 921 fprintf(fp, "Timestamp: %s %ld usec\n", 922 tstr, tv.tv_usec); 923 } 924 925 return 0; 926 } 927 928 int cmdlineno; 929 930 /* Like glibc getline but handle continuation lines and comments */ 931 ssize_t getcmdline(char **linep, size_t *lenp, FILE *in) 932 { 933 ssize_t cc; 934 char *cp; 935 936 if ((cc = getline(linep, lenp, in)) < 0) 937 return cc; /* eof or error */ 938 ++cmdlineno; 939 940 cp = strchr(*linep, '#'); 941 if (cp) 942 *cp = '\0'; 943 944 while ((cp = strstr(*linep, "\\\n")) != NULL) { 945 char *line1 = NULL; 946 size_t len1 = 0; 947 ssize_t cc1; 948 949 if ((cc1 = getline(&line1, &len1, in)) < 0) { 950 fprintf(stderr, "Missing continuation line\n"); 951 return cc1; 952 } 953 954 ++cmdlineno; 955 *cp = 0; 956 957 cp = strchr(line1, '#'); 958 if (cp) 959 *cp = '\0'; 960 961 *lenp = strlen(*linep) + strlen(line1) + 1; 962 *linep = realloc(*linep, *lenp); 963 if (!*linep) { 964 fprintf(stderr, "Out of memory\n"); 965 *lenp = 0; 966 return -1; 967 } 968 cc += cc1 - 2; 969 strcat(*linep, line1); 970 free(line1); 971 } 972 return cc; 973 } 974 975 /* split command line into argument vector */ 976 int makeargs(char *line, char *argv[], int maxargs) 977 { 978 static const char ws[] = " \t\r\n"; 979 char *cp; 980 int argc = 0; 981 982 for (cp = line + strspn(line, ws); *cp; cp += strspn(cp, ws)) { 983 if (argc >= (maxargs - 1)) { 984 fprintf(stderr, "Too many arguments to command\n"); 985 exit(1); 986 } 987 988 /* word begins with quote */ 989 if (*cp == '\'' || *cp == '"') { 990 char quote = *cp++; 991 992 argv[argc++] = cp; 993 /* find ending quote */ 994 cp = strchr(cp, quote); 995 if (cp == NULL) { 996 fprintf(stderr, "Unterminated quoted string\n"); 997 exit(1); 998 } 999 *cp++ = 0; 1000 continue; 1001 } 1002 1003 argv[argc++] = cp; 1004 /* find end of word */ 1005 cp += strcspn(cp, ws); 1006 *cp++ = 0; 1007 } 1008 argv[argc] = NULL; 1009 1010 return argc; 1011 } 1012 1013 int inet_get_addr(const char *src, __u32 *dst, struct in6_addr *dst6) 1014 { 1015 if (strchr(src, ':')) 1016 return inet_pton(AF_INET6, src, dst6); 1017 else 1018 return inet_pton(AF_INET, src, dst); 1019 } 1020 1021 void print_nlmsg_timestamp(FILE *fp, const struct nlmsghdr *n) 1022 { 1023 char *tstr; 1024 time_t secs = ((__u32*)NLMSG_DATA(n))[0]; 1025 long usecs = ((__u32*)NLMSG_DATA(n))[1]; 1026 tstr = asctime(localtime(&secs)); 1027 tstr[strlen(tstr)-1] = 0; 1028 fprintf(fp, "Timestamp: %s %lu us\n", tstr, usecs); 1029 } 1030 1031 static int on_netns(char *nsname, void *arg) 1032 { 1033 struct netns_func *f = arg; 1034 1035 if (netns_switch(nsname)) 1036 return -1; 1037 1038 return f->func(nsname, f->arg); 1039 } 1040 1041 static int on_netns_label(char *nsname, void *arg) 1042 { 1043 printf("\nnetns: %s\n", nsname); 1044 return on_netns(nsname, arg); 1045 } 1046 1047 int do_each_netns(int (*func)(char *nsname, void *arg), void *arg, 1048 bool show_label) 1049 { 1050 struct netns_func nsf = { .func = func, .arg = arg }; 1051 1052 if (show_label) 1053 return netns_foreach(on_netns_label, &nsf); 1054 1055 return netns_foreach(on_netns, &nsf); 1056 } 1057 1058 char *int_to_str(int val, char *buf) 1059 { 1060 sprintf(buf, "%d", val); 1061 return buf; 1062 } 1063
