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 <sys/types.h>
29 #include "libvalidate.h"
49 struct dt_fun *function;
56 struct uci_context *ctx;
59 struct dt_op stack[32];
65 bool (*call)(struct dt_state *s, int nargs);
69 dt_test_number(double number, const char *value)
74 n = strtod(value, &e);
76 return (e > value && *e == 0 && n == number);
80 dt_test_string(const char *s, const char *end, const char *value)
89 if (!esc && *s == '\\')
108 return (*s == *value || (s >= end && *value == 0));
112 dt_step(struct dt_state *s);
115 dt_call(struct dt_state *s);
117 #define dt_getint(n, v) \
118 ((n < nargs && s->stack[s->pos + n].type == OP_NUMBER) \
119 ? (v = s->stack[s->pos + n].value.number, 1) : 0)
122 dt_type_or(struct dt_state *s, int nargs)
132 dt_type_and(struct dt_state *s, int nargs)
142 dt_type_not(struct dt_state *s, int nargs)
151 dt_type_neg(struct dt_state *s, int nargs)
154 const char *value = s->value;
159 if (*s->value == '!')
160 while (isspace(*++s->value));
169 dt_type_list(struct dt_state *s, int nargs)
173 char *p, *str = strdup(s->value);
174 const char *value = s->value;
176 if (!str || !nargs) {
181 for (p = strtok(str, " \t"); p; p = strtok(NULL, " \t"))
201 dt_type_min(struct dt_state *s, int nargs)
207 if (dt_getint(0, min))
209 n = strtol(s->value, &e, 0);
210 return (e > s->value && *e == 0 && n >= min);
217 dt_type_max(struct dt_state *s, int nargs)
223 if (dt_getint(0, max))
225 n = strtol(s->value, &e, 0);
226 return (e > s->value && *e == 0 && n <= max);
233 dt_type_range(struct dt_state *s, int nargs)
240 if (dt_getint(0, min) && dt_getint(1, max))
242 n = strtol(s->value, &e, 0);
243 return (e > s->value && *e == 0 && n >= min && n <= max);
250 dt_type_minlen(struct dt_state *s, int nargs)
254 if (dt_getint(0, min))
255 return (strlen(s->value) >= min);
261 dt_type_maxlen(struct dt_state *s, int nargs)
265 if (dt_getint(0, max))
266 return (strlen(s->value) <= max);
272 dt_type_rangelen(struct dt_state *s, int nargs)
276 int len = strlen(s->value);
278 if (dt_getint(0, min) && dt_getint(1, max))
279 return (len >= min && len <= max);
285 dt_type_int(struct dt_state *s, int nargs)
290 if (!isxdigit(*s->value) && *s->value != '-')
294 strtol(s->value, &e, base);
296 return (e > s->value && *e == 0);
300 dt_type_uint(struct dt_state *s, int nargs)
305 if (!isxdigit(*s->value))
309 strtoul(s->value, &e, base);
311 return (e > s->value && *e == 0);
315 dt_type_float(struct dt_state *s, int nargs)
319 strtod(s->value, &e);
321 return (e > s->value && *e == 0);
325 dt_type_ufloat(struct dt_state *s, int nargs)
330 n = strtod(s->value, &e);
332 return (e > s->value && *e == 0 && n >= 0.0);
336 dt_type_bool(struct dt_state *s, int nargs)
339 const char *values[] = {
340 "0", "off", "false", "no", "disabled",
341 "1", "on", "true", "yes", "enabled"
344 for (i = 0; i < sizeof(values) / sizeof(values[0]); i++)
345 if (!strcasecmp(values[i], s->value))
352 dt_type_string(struct dt_state *s, int nargs)
356 int len = strlen(s->value);
358 if (dt_getint(0, min) && (len < min))
361 if (dt_getint(1, max) && (len > max))
368 dt_type_hexstring(struct dt_state *s, int nargs)
372 int len = strlen(s->value);
378 if (dt_getint(0, min) && (len < min))
381 if (dt_getint(1, max) && (len > max))
384 for (p = s->value; *p; p++)
392 dt_type_ip4addr(struct dt_state *s, int nargs)
395 return inet_pton(AF_INET, s->value, &a);
399 dt_type_ip6addr(struct dt_state *s, int nargs)
402 return inet_pton(AF_INET6, s->value, &a);
406 dt_type_ipaddr(struct dt_state *s, int nargs)
408 return (dt_type_ip4addr(s, 0) || dt_type_ip6addr(s, 0));
412 dt_type_netmask4(struct dt_state *s, int nargs)
417 if (!inet_pton(AF_INET, s->value, &a))
423 a.s_addr = ntohl(a.s_addr);
425 for (i = 0; (i < 32) && !(a.s_addr & (1 << i)); i++);
427 return ((uint32_t)(~((1 << i) - 1)) == a.s_addr);
431 dt_type_netmask6(struct dt_state *s, int nargs)
436 if (!inet_pton(AF_INET6, s->value, &a))
439 for (i = 0; (i < 16) && (a.s6_addr[i] == 0xFF); i++);
444 if ((a.s6_addr[i] != 255) && (a.s6_addr[i] != 254) &&
445 (a.s6_addr[i] != 252) && (a.s6_addr[i] != 248) &&
446 (a.s6_addr[i] != 240) && (a.s6_addr[i] != 224) &&
447 (a.s6_addr[i] != 192) && (a.s6_addr[i] != 128) &&
451 for (; (i < 16) && (a.s6_addr[i] == 0); i++);
457 dt_type_cidr4(struct dt_state *s, int nargs)
461 char *p, buf[sizeof("255.255.255.255/32\0")];
463 if (strlen(s->value) >= sizeof(buf))
466 strcpy(buf, s->value);
467 p = strchr(buf, '/');
473 n = strtoul(p, &p, 10);
475 if ((*p != 0) || (n > 32))
479 return inet_pton(AF_INET, buf, &a);
483 dt_type_cidr6(struct dt_state *s, int nargs)
487 char *p, buf[sizeof("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255/128\0")];
489 if (strlen(s->value) >= sizeof(buf))
492 strcpy(buf, s->value);
493 p = strchr(buf, '/');
499 n = strtoul(p, &p, 10);
501 if ((*p != 0) || (n > 128))
505 return inet_pton(AF_INET6, buf, &a);
509 dt_type_cidr(struct dt_state *s, int nargs)
511 return (dt_type_cidr4(s, 0) || dt_type_cidr6(s, 0));
515 dt_type_ipmask4(struct dt_state *s, int nargs)
520 char *p, buf[sizeof("255.255.255.255/255.255.255.255\0")];
522 if (strlen(s->value) >= sizeof(buf))
525 strcpy(buf, s->value);
526 p = strchr(buf, '/');
534 rv = dt_type_netmask4(s, 0);
541 return inet_pton(AF_INET, buf, &a);
545 dt_type_ipmask6(struct dt_state *s, int nargs)
550 char *p, buf[sizeof("FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255/"
551 "FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:255.255.255.255\0")];
553 if (strlen(s->value) >= sizeof(buf))
556 strcpy(buf, s->value);
557 p = strchr(buf, '/');
565 rv = dt_type_netmask6(s, 0);
572 return inet_pton(AF_INET6, buf, &a);
576 dt_type_ipmask(struct dt_state *s, int nargs)
578 return (dt_type_ipmask4(s, 0) || dt_type_ipmask6(s, 0));
582 dt_type_port(struct dt_state *s, int nargs)
587 n = strtoul(s->value, &e, 10);
589 return (e > s->value && *e == 0 && n <= 65535);
593 dt_type_portrange(struct dt_state *s, int nargs)
598 n = strtoul(s->value, &e, 10);
600 if (e == s->value || *e != '-')
603 m = strtoul(e + 1, &e, 10);
605 return (*e == 0 && n <= 65535 && m <= 65535 && n <= m);
609 dt_type_macaddr(struct dt_state *s, int nargs)
611 return !!ether_aton(s->value);
615 dt_type_uciname(struct dt_state *s, int nargs)
620 *p && ((*p >= 'A' && *p <= 'Z') || (*p >= 'a' && *p <= 'z') ||
621 (*p >= '0' && *p <= '9') || (*p == '_'));
628 dt_type_wpakey(struct dt_state *s, int nargs)
630 int len = strlen(s->value);
631 const char *p = s->value;
641 return (len >= 8 && len <= 63);
645 dt_type_wepkey(struct dt_state *s, int nargs)
647 int len = strlen(s->value);
648 const char *p = s->value;
650 if (!strncmp(p, "s:", 2))
656 if (len == 10 || len == 26)
664 return (len == 5 || len == 13);
668 dt_type_hostname(struct dt_state *s, int nargs)
670 const char *p, *last;
672 for (p = last = s->value; *p; p++)
676 if ((p - last) == 0 || (p - last) > 63)
682 else if ((*p >= 'A' && *p <= 'Z') || (*p >= 'a' && *p <= 'z') ||
683 (*p >= '0' && *p <= '9') || (*p == '_') || (*p == '-'))
691 return ((p - last) > 0 && (p - last) <= 255);
695 dt_type_host(struct dt_state *s, int nargs)
697 return (dt_type_hostname(s, 0) || dt_type_ipaddr(s, 0));
701 dt_type_network(struct dt_state *s, int nargs)
703 return (dt_type_uciname(s, 0) || dt_type_host(s, 0));
707 dt_type_phonedigit(struct dt_state *s, int nargs)
712 *p && ((*p >= '0' && *p <= '9') || (*p == '*') || (*p == '#') ||
713 (*p == '!') || (*p == '.'));
720 dt_type_directory(struct dt_state *s, int nargs)
723 return (!stat(s->value, &st) && S_ISDIR(st.st_mode));
728 dt_type_device(struct dt_state *s, int nargs)
731 return (!stat(s->value, &st) &&
732 (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode)));
736 dt_type_file(struct dt_state *s, int nargs)
739 return (!stat(s->value, &st) && S_ISREG(st.st_mode));
743 dt_type_regex(struct dt_state *s, int nargs)
750 if (nargs < 1 || s->stack[s->pos].type != OP_STRING)
753 relen = s->stack[s->pos].length;
754 re = alloca(relen + 3);
759 memset(re, 0, relen + 3);
760 memcpy(re + 1, s->stack[s->pos].value.string, relen);
765 if (regcomp(&pattern, re, REG_EXTENDED | REG_NOSUB))
768 rv = !regexec(&pattern, s->value, 0, NULL, 0);
776 dt_uci_lookup(struct dt_state *s, const char *pkg,
777 const char *sct, const char *opt, enum uci_type type)
779 struct uci_ptr ptr = {
785 if (!s->ctx || uci_lookup_ptr(s->ctx, &ptr, NULL, false) ||
786 !(ptr.flags & UCI_LOOKUP_COMPLETE))
789 if (ptr.last->type != type)
794 case UCI_TYPE_PACKAGE:
795 return uci_to_package(ptr.last);
797 case UCI_TYPE_SECTION:
798 return uci_to_section(ptr.last);
800 case UCI_TYPE_OPTION:
801 return uci_to_option(ptr.last);
809 dt_uci_cmp(struct dt_state *s,
810 const char *pkg, const char *sct, const char *opt)
812 struct uci_element *e;
813 struct uci_option *o = dt_uci_lookup(s, pkg, sct, opt, UCI_TYPE_OPTION);
820 case UCI_TYPE_STRING:
821 if (!strcmp(s->value, o->v.string))
826 uci_foreach_element(&o->v.list, e)
827 if (!strcmp(s->value, e->name))
836 dt_type_uci(struct dt_state *s, int nargs)
839 struct uci_element *e;
840 struct uci_package *p;
846 for (i = 0; i < nargs && i < 3; i++)
848 if (s->stack[s->pos + i].type != OP_STRING)
851 len = s->stack[s->pos + i].length;
852 cso[i] = alloca(len + 1);
857 memset(cso[i], 0, len + 1);
858 memcpy(cso[i], s->stack[s->pos + i].value.string, len);
861 if (!cso[0] || !cso[1] || (*cso[1] != '@' && !cso[2]))
865 return dt_uci_cmp(s, cso[0], cso[1], cso[2]);
867 p = dt_uci_lookup(s, cso[0], NULL, NULL, UCI_TYPE_PACKAGE);
872 uci_foreach_element(&p->sections, e)
874 if (strcmp(uci_to_section(e)->type, cso[1] + 1))
879 if (!strcmp(s->value, e->name))
884 if (dt_uci_cmp(s, cso[0], e->name, cso[2]))
893 static struct dt_fun dt_types[] = {
894 { "or", DT_INVALID, dt_type_or },
895 { "and", DT_INVALID, dt_type_and },
896 { "not", DT_INVALID, dt_type_not },
897 { "neg", DT_INVALID, dt_type_neg },
898 { "list", DT_INVALID, dt_type_list },
899 { "min", DT_NUMBER, dt_type_min },
900 { "max", DT_NUMBER, dt_type_max },
901 { "range", DT_NUMBER, dt_type_range },
902 { "minlength", DT_STRING, dt_type_minlen },
903 { "maxlength", DT_STRING, dt_type_maxlen },
904 { "rangelength", DT_STRING, dt_type_rangelen },
905 { "integer", DT_NUMBER, dt_type_int },
906 { "uinteger", DT_NUMBER, dt_type_uint },
907 { "float", DT_NUMBER, dt_type_float },
908 { "ufloat", DT_NUMBER, dt_type_ufloat },
909 { "bool", DT_BOOL, dt_type_bool },
910 { "string", DT_STRING, dt_type_string },
911 { "hexstring", DT_STRING, dt_type_hexstring },
912 { "ip4addr", DT_STRING, dt_type_ip4addr },
913 { "ip6addr", DT_STRING, dt_type_ip6addr },
914 { "ipaddr", DT_STRING, dt_type_ipaddr },
915 { "cidr4", DT_STRING, dt_type_cidr4 },
916 { "cidr6", DT_STRING, dt_type_cidr6 },
917 { "cidr", DT_STRING, dt_type_cidr },
918 { "netmask4", DT_STRING, dt_type_netmask4 },
919 { "netmask6", DT_STRING, dt_type_netmask6 },
920 { "ipmask4", DT_STRING, dt_type_ipmask4 },
921 { "ipmask6", DT_STRING, dt_type_ipmask6 },
922 { "ipmask", DT_STRING, dt_type_ipmask },
923 { "port", DT_NUMBER, dt_type_port },
924 { "portrange", DT_STRING, dt_type_portrange },
925 { "macaddr", DT_STRING, dt_type_macaddr },
926 { "uciname", DT_STRING, dt_type_uciname },
927 { "wpakey", DT_STRING, dt_type_wpakey },
928 { "wepkey", DT_STRING, dt_type_wepkey },
929 { "hostname", DT_STRING, dt_type_hostname },
930 { "host", DT_STRING, dt_type_host },
931 { "network", DT_STRING, dt_type_network },
932 { "phonedigit", DT_STRING, dt_type_phonedigit },
933 { "directory", DT_STRING, dt_type_directory },
934 { "device", DT_STRING, dt_type_device },
935 { "file", DT_STRING, dt_type_file },
936 { "regex", DT_STRING, dt_type_regex },
937 { "uci", DT_STRING, dt_type_uci },
942 static struct dt_fun *
943 dt_lookup_function(const char *s, const char *e)
945 struct dt_fun *fun = dt_types;
949 if (!strncmp(fun->name, s, e - s) && *(fun->name + (e - s)) == '\0')
959 dt_parse_atom(struct dt_state *s, const char *label, const char *end)
966 struct dt_op *op = &s->stack[s->depth];
968 if ((s->depth + 1) >= (sizeof(s->stack) / sizeof(s->stack[0])))
970 printf("Syntax error, expression too long\n");
974 while (isspace(*label))
977 /* test whether label is a float */
978 dval = strtod(label, &e);
983 op->type = OP_NUMBER;
984 op->value.number = dval;
985 op->nextop = ++s->depth;
989 else if ((*label == '"') || (*label == '\''))
991 for (p = label + 1, q = *label, esc = false; p <= end; p++)
1006 op->type = OP_STRING;
1007 op->length = (p - label) - 1;
1008 op->value.string = label + 1;
1009 op->nextop = ++s->depth;
1015 printf("Syntax error, unterminated string\n");
1021 p <= end && ((*p >= 'A' && *p <= 'Z') ||
1022 (*p >= 'a' && *p <= 'z') ||
1023 (*p >= '0' && *p <= '9') ||
1027 func = dt_lookup_function(label, p);
1031 printf("Syntax error, unrecognized function\n");
1036 op->type = OP_FUNCTION;
1037 op->value.function = func;
1038 op->nextop = ++s->depth;
1043 printf("Syntax error, unexpected EOF\n");
1048 dt_parse_list(struct dt_state *s, const char *code, const char *end);
1051 dt_parse_expr(const char *code, const char *end, struct dt_state *s)
1055 if (!dt_parse_atom(s, code, end))
1058 tok = &s->stack[s->depth - 1];
1060 while (isspace(*tok->next))
1063 if (tok->type == OP_FUNCTION)
1065 if (*tok->next == '(')
1069 while (isspace(*end) && end > tok->next + 1)
1072 return dt_parse_list(s, tok->next + 1, end);
1074 else if (tok->next == end)
1076 return dt_parse_list(s, tok->next, tok->next);
1079 printf("Syntax error, expected '(' or EOF after function label\n");
1082 else if (tok->next == end)
1087 printf("Syntax error, expected ',' after literal\n");
1092 dt_parse_list(struct dt_state *s, const char *code, const char *end)
1097 const char *p, *last;
1103 fptr = &s->stack[s->depth - 1];
1105 for (nest = 0, p = last = code, esc = false, c = *p;
1107 p++, c = (p < end) ? *p : '\0')
1135 if (!dt_parse_expr(last, p, s))
1148 fptr->nextop = s->depth;
1153 dt_step(struct dt_state *s)
1156 struct dt_op *op = &s->stack[s->pos];
1161 rv = dt_test_number(op->value.number, s->value);
1163 s->valtype = DT_NUMBER;
1167 rv = dt_test_string(op->value.string, op->value.string + op->length, s->value);
1169 s->valtype = DT_STRING;
1181 s->pos = op->nextop;
1186 dt_call(struct dt_state *s)
1189 struct dt_op *fptr = &s->stack[s->pos];
1190 struct dt_fun *func = fptr->value.function;
1194 rv = func->call(s, fptr->length);
1196 if (rv && func->valtype)
1197 s->valtype = func->valtype;
1199 s->pos = fptr->nextop;
1205 dt_parse(const char *code, const char *value)
1207 enum dt_type rv = DT_INVALID;
1209 struct dt_state s = {
1213 .type = OP_FUNCTION,
1214 .value.function = &dt_types[0],
1220 if (!value || !*value)
1223 if (!dt_parse_list(&s, code, code + strlen(code)))
1226 s.ctx = uci_alloc_context();
1233 uci_free_context(s.ctx);