/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include "bus-internal.h" bool object_path_is_valid(const char *p) { const char *q; bool slash; if (!p) return false; if (p[0] != '/') return false; if (p[1] == 0) return true; for (slash = true, q = p+1; *q; q++) if (*q == '/') { if (slash) return false; slash = true; } else { bool good; good = (*q >= 'a' && *q <= 'z') || (*q >= 'A' && *q <= 'Z') || (*q >= '0' && *q <= '9') || *q == '_'; if (!good) return false; slash = false; } if (slash) return false; return true; } char* object_path_startswith(const char *a, const char *b) { const char *p; if (!object_path_is_valid(a) || !object_path_is_valid(b)) return NULL; if (streq(b, "/")) return (char*) a + 1; p = startswith(a, b); if (!p) return NULL; if (*p == 0) return (char*) p; if (*p == '/') return (char*) p + 1; return NULL; } bool interface_name_is_valid(const char *p) { const char *q; bool dot, found_dot = false; if (isempty(p)) return false; for (dot = true, q = p; *q; q++) if (*q == '.') { if (dot) return false; found_dot = dot = true; } else { bool good; good = (*q >= 'a' && *q <= 'z') || (*q >= 'A' && *q <= 'Z') || (!dot && *q >= '0' && *q <= '9') || *q == '_'; if (!good) return false; dot = false; } if (q - p > 255) return false; if (dot) return false; if (!found_dot) return false; return true; } bool service_name_is_valid(const char *p) { const char *q; bool dot, found_dot = false, unique; if (isempty(p)) return false; unique = p[0] == ':'; for (dot = true, q = unique ? p+1 : p; *q; q++) if (*q == '.') { if (dot) return false; found_dot = dot = true; } else { bool good; good = (*q >= 'a' && *q <= 'z') || (*q >= 'A' && *q <= 'Z') || ((!dot || unique) && *q >= '0' && *q <= '9') || *q == '_' || *q == '-'; if (!good) return false; dot = false; } if (q - p > 255) return false; if (dot) return false; if (!found_dot) return false; return true; } bool member_name_is_valid(const char *p) { const char *q; if (isempty(p)) return false; for (q = p; *q; q++) { bool good; good = (*q >= 'a' && *q <= 'z') || (*q >= 'A' && *q <= 'Z') || (*q >= '0' && *q <= '9') || *q == '_'; if (!good) return false; } if (q - p > 255) return false; return true; } static bool complex_pattern_check(char c, const char *a, const char *b) { bool separator = false; if (!a && !b) return true; if (!a || !b) return false; for (;;) { if (*a != *b) return (separator && (*a == 0 || *b == 0)) || (*a == 0 && *b == c && b[1] == 0) || (*b == 0 && *a == c && a[1] == 0); if (*a == 0) return true; separator = *a == c; a++, b++; } } bool namespace_complex_pattern(const char *pattern, const char *value) { return complex_pattern_check('.', pattern, value); } bool path_complex_pattern(const char *pattern, const char *value) { return complex_pattern_check('/', pattern, value); } static bool simple_pattern_check(char c, const char *a, const char *b) { if (!a && !b) return true; if (!a || !b) return false; for (;;) { if (*a != *b) return *a == 0 && *b == c; if (*a == 0) return true; a++, b++; } } bool namespace_simple_pattern(const char *pattern, const char *value) { return simple_pattern_check('.', pattern, value); } bool path_simple_pattern(const char *pattern, const char *value) { return simple_pattern_check('/', pattern, value); } int bus_message_type_from_string(const char *s, uint8_t *u) { if (streq(s, "signal")) *u = SD_BUS_MESSAGE_SIGNAL; else if (streq(s, "method_call")) *u = SD_BUS_MESSAGE_METHOD_CALL; else if (streq(s, "error")) *u = SD_BUS_MESSAGE_METHOD_ERROR; else if (streq(s, "method_return")) *u = SD_BUS_MESSAGE_METHOD_RETURN; else return -EINVAL; return 0; } const char *bus_message_type_to_string(uint8_t u) { if (u == SD_BUS_MESSAGE_SIGNAL) return "signal"; else if (u == SD_BUS_MESSAGE_METHOD_CALL) return "method_call"; else if (u == SD_BUS_MESSAGE_METHOD_ERROR) return "error"; else if (u == SD_BUS_MESSAGE_METHOD_RETURN) return "method_return"; else return NULL; } char *bus_address_escape(const char *v) { const char *a; char *r, *b; r = new(char, strlen(v)*3+1); if (!r) return NULL; for (a = v, b = r; *a; a++) { if ((*a >= '0' && *a <= '9') || (*a >= 'a' && *a <= 'z') || (*a >= 'A' && *a <= 'Z') || strchr("_-/.", *a)) *(b++) = *a; else { *(b++) = '%'; *(b++) = hexchar(*a >> 4); *(b++) = hexchar(*a & 0xF); } } *b = 0; return r; }