Annotation of embedaddon/strongswan/src/libcharon/plugins/osx_attr/osx_attr_handler.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2013 Martin Willi
! 3: * Copyright (C) 2013 revosec AG
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #include "osx_attr_handler.h"
! 17:
! 18: #include <networking/host.h>
! 19: #include <utils/debug.h>
! 20:
! 21: #include <SystemConfiguration/SCDynamicStore.h>
! 22:
! 23: typedef struct private_osx_attr_handler_t private_osx_attr_handler_t;
! 24:
! 25: /**
! 26: * Private data of an osx_attr_handler_t object.
! 27: */
! 28: struct private_osx_attr_handler_t {
! 29:
! 30: /**
! 31: * Public interface
! 32: */
! 33: osx_attr_handler_t public;
! 34:
! 35: /**
! 36: * Backup of original DNS servers, before we mess with it
! 37: */
! 38: CFMutableArrayRef original;
! 39:
! 40: /**
! 41: * Append DNS servers to existing entries, instead of replacing
! 42: */
! 43: bool append;
! 44: };
! 45:
! 46: /**
! 47: * Create a path to the DNS configuration of the Primary IPv4 Service
! 48: */
! 49: static CFStringRef create_dns_path(SCDynamicStoreRef store)
! 50: {
! 51: CFStringRef service, path = NULL;
! 52: CFDictionaryRef dict;
! 53:
! 54: /* get primary service */
! 55: dict = SCDynamicStoreCopyValue(store, CFSTR("State:/Network/Global/IPv4"));
! 56: if (dict)
! 57: {
! 58: service = CFDictionaryGetValue(dict, CFSTR("PrimaryService"));
! 59: if (service)
! 60: {
! 61: path = CFStringCreateWithFormat(NULL, NULL,
! 62: CFSTR("State:/Network/Service/%@/DNS"), service);
! 63: }
! 64: else
! 65: {
! 66: DBG1(DBG_CFG, "SystemConfiguration PrimaryService not known");
! 67: }
! 68: CFRelease(dict);
! 69: }
! 70: else
! 71: {
! 72: DBG1(DBG_CFG, "getting global IPv4 SystemConfiguration failed");
! 73: }
! 74: return path;
! 75: }
! 76:
! 77: /**
! 78: * Create a mutable dictionary from path, a new one if not found
! 79: */
! 80: static CFMutableDictionaryRef get_dictionary(SCDynamicStoreRef store,
! 81: CFStringRef path)
! 82: {
! 83: CFDictionaryRef dict;
! 84: CFMutableDictionaryRef mut = NULL;
! 85:
! 86: dict = SCDynamicStoreCopyValue(store, path);
! 87: if (dict)
! 88: {
! 89: if (CFGetTypeID(dict) == CFDictionaryGetTypeID())
! 90: {
! 91: mut = CFDictionaryCreateMutableCopy(NULL, 0, dict);
! 92: }
! 93: CFRelease(dict);
! 94: }
! 95: if (!mut)
! 96: {
! 97: mut = CFDictionaryCreateMutable(NULL, 0,
! 98: &kCFTypeDictionaryKeyCallBacks,
! 99: &kCFTypeDictionaryValueCallBacks);
! 100: }
! 101: return mut;
! 102: }
! 103:
! 104: /**
! 105: * Create a mutable array from dictionary path, a new one if not found
! 106: */
! 107: static CFMutableArrayRef get_array_from_dict(CFDictionaryRef dict,
! 108: CFStringRef name)
! 109: {
! 110: CFArrayRef arr;
! 111:
! 112: arr = CFDictionaryGetValue(dict, name);
! 113: if (arr && CFGetTypeID(arr) == CFArrayGetTypeID())
! 114: {
! 115: return CFArrayCreateMutableCopy(NULL, 0, arr);
! 116: }
! 117: return CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
! 118: }
! 119:
! 120: /**
! 121: * Add/Remove a DNS server to the configuration
! 122: */
! 123: static bool manage_dns(private_osx_attr_handler_t *this,
! 124: int family, chunk_t data, bool add)
! 125: {
! 126: SCDynamicStoreRef store;
! 127: CFStringRef path, dns;
! 128: CFMutableArrayRef arr;
! 129: CFMutableDictionaryRef dict;
! 130: CFIndex i;
! 131: host_t *server;
! 132: char buf[64];
! 133: bool success = FALSE;
! 134:
! 135: server = host_create_from_chunk(family, data, 0);
! 136: if (!server)
! 137: {
! 138: return FALSE;
! 139: }
! 140: snprintf(buf, sizeof(buf), "%H", server);
! 141: server->destroy(server);
! 142:
! 143: store = SCDynamicStoreCreate(NULL, CFSTR("osx-attr"), NULL, NULL);
! 144: path = create_dns_path(store);
! 145: if (path)
! 146: {
! 147: dict = get_dictionary(store, path);
! 148: arr = get_array_from_dict(dict, CFSTR("ServerAddresses"));
! 149: dns = CFStringCreateWithCString(NULL, buf, kCFStringEncodingUTF8);
! 150: if (add)
! 151: {
! 152: if (!this->append && !this->original)
! 153: { /* backup original config, start with empty set */
! 154: this->original = arr;
! 155: arr = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
! 156: }
! 157: DBG1(DBG_CFG, "installing %s as DNS server", buf);
! 158: CFArrayInsertValueAtIndex(arr, 0, dns);
! 159: }
! 160: else
! 161: {
! 162: i = CFArrayGetFirstIndexOfValue(arr,
! 163: CFRangeMake(0, CFArrayGetCount(arr)), dns);
! 164: if (i >= 0)
! 165: {
! 166: DBG1(DBG_CFG, "removing %s from DNS servers (%d)", buf, i);
! 167: CFArrayRemoveValueAtIndex(arr, i);
! 168: }
! 169: if (!this->append && this->original && CFArrayGetCount(arr) == 0)
! 170: { /* restore original config */
! 171: CFRelease(arr);
! 172: arr = this->original;
! 173: this->original = NULL;
! 174: }
! 175: }
! 176: CFRelease(dns);
! 177: CFDictionarySetValue(dict, CFSTR("ServerAddresses"), arr);
! 178: CFRelease(arr);
! 179:
! 180: success = SCDynamicStoreSetValue(store, path, dict);
! 181: CFRelease(dict);
! 182: CFRelease(path);
! 183: }
! 184: CFRelease(store);
! 185:
! 186: if (!success)
! 187: {
! 188: DBG1(DBG_CFG, "adding DNS server to SystemConfiguration failed");
! 189: }
! 190: return success;
! 191: }
! 192:
! 193: METHOD(attribute_handler_t, handle, bool,
! 194: private_osx_attr_handler_t *this, ike_sa_t *ike_sa,
! 195: configuration_attribute_type_t type, chunk_t data)
! 196: {
! 197: switch (type)
! 198: {
! 199: case INTERNAL_IP4_DNS:
! 200: return manage_dns(this, AF_INET, data, TRUE);
! 201: default:
! 202: return FALSE;
! 203: }
! 204: }
! 205:
! 206: METHOD(attribute_handler_t, release, void,
! 207: private_osx_attr_handler_t *this, ike_sa_t *ike_sa,
! 208: configuration_attribute_type_t type, chunk_t data)
! 209: {
! 210: switch (type)
! 211: {
! 212: case INTERNAL_IP4_DNS:
! 213: manage_dns(this, AF_INET, data, FALSE);
! 214: break;
! 215: default:
! 216: break;
! 217: }
! 218: }
! 219:
! 220: METHOD(enumerator_t, enumerate_dns, bool,
! 221: enumerator_t *this, va_list args)
! 222: {
! 223: configuration_attribute_type_t *type;
! 224: chunk_t *data;
! 225:
! 226: VA_ARGS_VGET(args, type, data);
! 227: *type = INTERNAL_IP4_DNS;
! 228: *data = chunk_empty;
! 229: this->venumerate = (void*)return_false;
! 230: return TRUE;
! 231: }
! 232:
! 233: METHOD(attribute_handler_t, create_attribute_enumerator, enumerator_t *,
! 234: private_osx_attr_handler_t *this, ike_sa_t *ike_sa,
! 235: linked_list_t *vips)
! 236: {
! 237: enumerator_t *enumerator;
! 238:
! 239: INIT(enumerator,
! 240: .enumerate = enumerator_enumerate_default,
! 241: .venumerate = _enumerate_dns,
! 242: .destroy = (void*)free,
! 243: );
! 244: return enumerator;
! 245: }
! 246:
! 247: METHOD(osx_attr_handler_t, destroy, void,
! 248: private_osx_attr_handler_t *this)
! 249: {
! 250: free(this);
! 251: }
! 252:
! 253: /**
! 254: * See header
! 255: */
! 256: osx_attr_handler_t *osx_attr_handler_create()
! 257: {
! 258: private_osx_attr_handler_t *this;
! 259:
! 260: INIT(this,
! 261: .public = {
! 262: .handler = {
! 263: .handle = _handle,
! 264: .release = _release,
! 265: .create_attribute_enumerator = _create_attribute_enumerator,
! 266: },
! 267: .destroy = _destroy,
! 268: },
! 269: .append = lib->settings->get_bool(lib->settings,
! 270: "%s.plugins.osx-attr.append", TRUE, lib->ns),
! 271: );
! 272:
! 273: return &this->public;
! 274: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/cvsweb/back.gif){kind=icon}
Return to osx_attr_handler.c CVS log ![[TXT]](/icons/cvsweb/text.gif){kind=icon}
![[DIR]](/icons/cvsweb/dir.gif){kind=icon}
Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / strongswan / src / libcharon / plugins / osx_attr