2 * Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2.1
6 * as published by the Free Software Foundation
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
20 #include <arpa/inet.h>
21 #include <netinet/ether.h>
24 #include "libvalidate.h"
45 struct dt_fun *function;
53 struct dt_op stack[32];
58 bool (*call)(struct dt_state *s, int nargs);
62 dt_test_number(double number, const char *value)
67 n = strtod(value, &e);
69 return (e > value && *e == 0 && n == number);
73 dt_test_string(const char *s, const char *end, const char *value)
82 if (!esc && *s == '\\')
101 return (*s == *value || (s > end && *value == 0));
105 dt_step(struct dt_state *s);
108 dt_call(struct dt_state *s);
111 dt_type_or(struct dt_state *s, int nargs)
121 dt_type_and(struct dt_state *s, int nargs)
131 dt_type_not(struct dt_state *s, int nargs)
140 dt_type_neg(struct dt_state *s, int nargs)
143 const char *value = s->value;
148 if (*s->value == '!')
149 while (isspace(*++s->value));
158 dt_type_list(struct dt_state *s, int nargs)
162 char *p, *str = strdup(s->value);
163 const char *value = s->value;
168 for (p = strtok(str, " \t"); p; p = strtok(NULL, " \t"))
188 dt_type_min(struct dt_state *s, int nargs)
193 if (nargs >= 1 && s->stack[s->pos].type == OP_NUMBER)
195 n = strtol(s->value, &e, 0);
197 return (e > s->value && *e == 0 &&
198 n >= s->stack[s->pos].value.number);
205 dt_type_max(struct dt_state *s, int nargs)
210 if (nargs >= 1 && s->stack[s->pos].type == OP_NUMBER)
212 n = strtol(s->value, &e, 0);
214 return (e > s->value && *e == 0 &&
215 n <= s->stack[s->pos].value.number);
222 dt_type_range(struct dt_state *s, int nargs)
228 s->stack[s->pos].type == OP_NUMBER &&
229 s->stack[s->pos + 1].type == OP_NUMBER)
231 n = strtol(s->value, &e, 0);
233 return (e > s->value && *e == 0 &&
234 n >= s->stack[s->pos].value.number &&
235 n <= s->stack[s->pos + 1].value.number);
242 dt_type_minlen(struct dt_state *s, int nargs)
244 if (nargs >= 1 && s->stack[s->pos].type == OP_NUMBER)
245 return (strlen(s->value) >= s->stack[s->pos].value.number);
251 dt_type_maxlen(struct dt_state *s, int nargs)
253 if (nargs >= 1 && s->stack[s->pos].type == OP_NUMBER)
254 return (strlen(s->value) <= s->stack[s->pos].value.number);
260 dt_type_rangelen(struct dt_state *s, int nargs)
263 s->stack[s->pos].type == OP_NUMBER &&
264 s->stack[s->pos + 1].type == OP_NUMBER)
265 return (strlen(s->value) >= s->stack[s->pos].value.number &&
266 strlen(s->value) <= s->stack[s->pos + 1].value.number);
272 dt_type_int(struct dt_state *s, int nargs)
276 strtol(s->value, &e, 0);
278 return (e > s->value && *e == 0);
282 dt_type_uint(struct dt_state *s, int nargs)
287 n = strtol(s->value, &e, 0);
289 return (e > s->value && *e == 0 && n >= 0);
293 dt_type_float(struct dt_state *s, int nargs)
297 strtod(s->value, &e);
299 return (e > s->value && *e == 0);
303 dt_type_ufloat(struct dt_state *s, int nargs)
308 n = strtod(s->value, &e);
310 return (e > s->value && *e == 0 && n >= 0.0);
314 dt_type_bool(struct dt_state *s, int nargs)
317 const char *values[] = {
318 "0", "off", "false", "no",
319 "1", "on", "true", "yes"
322 for (i = 0; i < sizeof(values) / sizeof(values[0]); i++)
323 if (!strcasecmp(values[i], s->value))
330 dt_type_string(struct dt_state *s, int nargs)
336 dt_type_ip4addr(struct dt_state *s, int nargs)
339 return inet_pton(AF_INET, s->value, &a);
343 dt_type_ip6addr(struct dt_state *s, int nargs)
346 return inet_pton(AF_INET6, s->value, &a);
350 dt_type_ipaddr(struct dt_state *s, int nargs)
352 return (dt_type_ip4addr(s, 0) || dt_type_ip6addr(s, 0));
356 dt_type_netmask4(struct dt_state *s, int nargs)
361 if (!inet_pton(AF_INET, s->value, &a))
367 a.s_addr = ntohl(a.s_addr);
369 for (i = 0; (i < 32) && !(a.s_addr & (1 << i)); i++);
371 return ((uint32_t)(~((1 << i) - 1)) == a.s_addr);
375 dt_type_netmask6(struct dt_state *s, int nargs)
380 if (!inet_pton(AF_INET6, s->value, &a))
383 for (i = 0; (i < 16) && (a.s6_addr[i] == 0xFF); i++);
388 if ((a.s6_addr[i] != 255) && (a.s6_addr[i] != 254) &&
389 (a.s6_addr[i] != 252) && (a.s6_addr[i] != 248) &&
390 (a.s6_addr[i] != 240) && (a.s6_addr[i] != 224) &&
391 (a.s6_addr[i] != 192) && (a.s6_addr[i] != 128) &&
395 for (; (i < 16) && (a.s6_addr[i] == 0); i++);
401 dt_type_cidr4(struct dt_state *s, int nargs)
405 char *p, buf[sizeof("255.255.255.255/32\0")];
407 if (strlen(s->value) >= sizeof(buf))
410 strcpy(buf, s->value);
411 p = strchr(buf, '/');
417 n = strtoul(p, &p, 10);
419 if ((*p != 0) || (n > 32))
423 return inet_pton(AF_INET, buf, &a);
427 dt_type_cidr6(struct dt_state *s, int nargs)
431 char *p, buf[sizeof("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255/128\0")];
433 if (strlen(s->value) >= sizeof(buf))
436 strcpy(buf, s->value);
437 p = strchr(buf, '/');
443 n = strtoul(p, &p, 10);
445 if ((*p != 0) || (n > 128))
449 return inet_pton(AF_INET6, buf, &a);
453 dt_type_cidr(struct dt_state *s, int nargs)
455 return (dt_type_cidr4(s, 0) || dt_type_cidr6(s, 0));
459 dt_type_ipmask4(struct dt_state *s, int nargs)
464 char *p, buf[sizeof("255.255.255.255/255.255.255.255\0")];
466 if (strlen(s->value) >= sizeof(buf))
469 strcpy(buf, s->value);
470 p = strchr(buf, '/');
478 rv = dt_type_netmask4(s, 0);
485 return inet_pton(AF_INET, buf, &a);
489 dt_type_ipmask6(struct dt_state *s, int nargs)
494 char *p, buf[sizeof("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255/"
495 "FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255\0")];
497 if (strlen(s->value) >= sizeof(buf))
500 strcpy(buf, s->value);
501 p = strchr(buf, '/');
509 rv = dt_type_netmask6(s, 0);
516 return inet_pton(AF_INET6, buf, &a);
520 dt_type_ipmask(struct dt_state *s, int nargs)
522 return (dt_type_ipmask4(s, 0) || dt_type_ipmask6(s, 0));
526 dt_type_port(struct dt_state *s, int nargs)
531 n = strtoul(s->value, &e, 10);
533 return (e > s->value && *e == 0 && n <= 65535);
537 dt_type_portrange(struct dt_state *s, int nargs)
542 n = strtoul(s->value, &e, 10);
544 if (e == s->value || *e != '-')
547 m = strtoul(e + 1, &e, 10);
549 return (*e == 0 && n <= 65535 && m <= 65535 && n <= m);
553 dt_type_macaddr(struct dt_state *s, int nargs)
555 return !!ether_aton(s->value);
559 dt_type_uciname(struct dt_state *s, int nargs)
564 *p && ((*p >= 'A' && *p <= 'Z') || (*p >= 'a' && *p <= 'z') ||
565 (*p >= '0' && *p <= '9') || (*p == '_'));
572 dt_type_wpakey(struct dt_state *s, int nargs)
574 int len = strlen(s->value);
575 const char *p = s->value;
585 return (len >= 8 && len <= 63);
589 dt_type_wepkey(struct dt_state *s, int nargs)
591 int len = strlen(s->value);
592 const char *p = s->value;
594 if (!strncmp(p, "s:", 2))
600 if (len == 10 || len == 26)
608 return (len == 5 || len == 13);
612 dt_type_hostname(struct dt_state *s, int nargs)
614 const char *p, *last;
616 for (p = last = s->value; *p; p++)
620 if ((p - last) == 0 || (p - last) > 63)
626 else if ((*p >= 'A' && *p <= 'Z') || (*p >= 'a' && *p <= 'z') ||
627 (*p >= '0' && *p <= '9') || (*p == '_') || (*p == '-'))
635 return ((p - last) > 0 && (p - last) <= 255);
639 dt_type_host(struct dt_state *s, int nargs)
641 return (dt_type_hostname(s, 0) || dt_type_ipaddr(s, 0));
645 dt_type_network(struct dt_state *s, int nargs)
647 return (dt_type_uciname(s, 0) || dt_type_host(s, 0));
651 dt_type_phonedigit(struct dt_state *s, int nargs)
656 *p && ((*p >= '0' && *p <= '9') || (*p == '*') || (*p == '#') ||
657 (*p == '!') || (*p == '.'));
664 dt_type_directory(struct dt_state *s, int nargs)
667 return (!stat(s->value, &st) && S_ISDIR(st.st_mode));
672 dt_type_device(struct dt_state *s, int nargs)
675 return (!stat(s->value, &st) &&
676 (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)));
680 dt_type_file(struct dt_state *s, int nargs)
683 return (!stat(s->value, &st) && S_ISREG(st.st_mode));
687 static struct dt_fun dt_types[] = {
688 { "or", dt_type_or },
689 { "and", dt_type_and },
690 { "not", dt_type_not },
691 { "neg", dt_type_neg },
692 { "list", dt_type_list },
693 { "min", dt_type_min },
694 { "max", dt_type_max },
695 { "range", dt_type_range },
696 { "minlength", dt_type_minlen },
697 { "maxlength", dt_type_maxlen },
698 { "rangelength", dt_type_rangelen },
699 { "integer", dt_type_int },
700 { "uinteger", dt_type_uint },
701 { "float", dt_type_float },
702 { "ufloat", dt_type_ufloat },
703 { "bool", dt_type_bool },
704 { "string", dt_type_string },
705 { "ip4addr", dt_type_ip4addr },
706 { "ip6addr", dt_type_ip6addr },
707 { "ipaddr", dt_type_ipaddr },
708 { "cidr4", dt_type_cidr4 },
709 { "cidr6", dt_type_cidr6 },
710 { "cidr", dt_type_cidr },
711 { "netmask4", dt_type_netmask4 },
712 { "netmask6", dt_type_netmask6 },
713 { "ipmask4", dt_type_ipmask4 },
714 { "ipmask6", dt_type_ipmask6 },
715 { "ipmask", dt_type_ipmask },
716 { "port", dt_type_port },
717 { "portrange", dt_type_portrange },
718 { "macaddr", dt_type_macaddr },
719 { "uciname", dt_type_uciname },
720 { "wpakey", dt_type_wpakey },
721 { "wepkey", dt_type_wepkey },
722 { "hostname", dt_type_hostname },
723 { "host", dt_type_host },
724 { "network", dt_type_network },
725 { "phonedigit", dt_type_phonedigit },
726 { "directory", dt_type_directory },
727 { "device", dt_type_device },
728 { "file", dt_type_file },
733 static struct dt_fun *
734 dt_lookup_function(const char *s, const char *e)
736 struct dt_fun *fun = dt_types;
740 if (!strncmp(fun->name, s, e - s) && *(fun->name + (e - s)) == '\0')
750 dt_parse_atom(struct dt_state *s, const char *label, const char *end)
757 struct dt_op *op = &s->stack[s->depth];
759 if ((s->depth + 1) >= (sizeof(s->stack) / sizeof(s->stack[0])))
761 printf("Syntax error, expression too long\n");
765 while (isspace(*label))
768 /* test whether label is a float */
769 dval = strtod(label, &e);
774 op->type = OP_NUMBER;
775 op->value.number = dval;
776 op->nextop = ++s->depth;
780 else if ((*label == '"') || (*label == '\''))
782 for (p = label + 1, q = *label, esc = false; p <= end; p++)
797 op->type = OP_STRING;
798 op->length = (p - label) - 2;
799 op->value.string = label + 1;
800 op->nextop = ++s->depth;
806 printf("Syntax error, unterminated string\n");
812 p <= end && ((*p >= 'A' && *p <= 'Z') ||
813 (*p >= 'a' && *p <= 'z') ||
814 (*p >= '0' && *p <= '9') ||
818 func = dt_lookup_function(label, p);
822 printf("Syntax error, unrecognized function\n");
827 op->type = OP_FUNCTION;
828 op->value.function = func;
829 op->nextop = ++s->depth;
834 printf("Syntax error, unexpected EOF\n");
839 dt_parse_list(struct dt_state *s, const char *code, const char *end);
842 dt_parse_expr(const char *code, const char *end, struct dt_state *s)
846 if (!dt_parse_atom(s, code, end))
849 tok = &s->stack[s->depth - 1];
851 while (isspace(*tok->next))
854 if (tok->type == OP_FUNCTION)
856 if (*tok->next == '(')
860 while (isspace(*end) && end > tok->next + 1)
863 return dt_parse_list(s, tok->next + 1, end);
865 else if (tok->next == end)
867 return dt_parse_list(s, tok->next, tok->next);
870 printf("Syntax error, expected '(' or EOF after function label\n");
873 else if (tok->next == end)
878 printf("Syntax error, expected ',' after literal\n");
883 dt_parse_list(struct dt_state *s, const char *code, const char *end)
888 const char *p, *last;
894 fptr = &s->stack[s->depth - 1];
896 for (nest = 0, p = last = code, esc = false, c = *p;
898 p++, c = (p < end) ? *p : '\0')
926 if (!dt_parse_expr(last, p, s))
939 fptr->nextop = s->depth;
944 dt_step(struct dt_state *s)
947 struct dt_op *op = &s->stack[s->pos];
952 rv = op->value.boolean;
956 rv = dt_test_number(op->value.number, s->value);
960 rv = dt_test_string(op->value.string, op->value.string + op->length, s->value);
977 dt_call(struct dt_state *s)
980 struct dt_op *fptr = &s->stack[s->pos];
981 struct dt_fun *func = fptr->value.function;
985 rv = func->call(s, fptr->length);
987 s->pos = fptr->nextop;
993 dt_parse(const char *code, const char *value)
995 struct dt_state s = {
1000 .value.function = &dt_types[0],
1006 if (!value || !*value)
1009 if (!dt_parse_list(&s, code, code + strlen(code)))