Annotation of embedaddon/strongswan/src/libtnccs/tnc/tnc.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011 Andreas Steffen
! 3: * HSR Hochschule fuer Technik Rapperswil
! 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: #define _GNU_SOURCE /* for stdndup() */
! 17: #include <sys/types.h>
! 18: #include <sys/stat.h>
! 19: #include <unistd.h>
! 20: #include <errno.h>
! 21: #include <fcntl.h>
! 22: #include <string.h>
! 23:
! 24: #include "tnc.h"
! 25:
! 26: #include <utils/lexparser.h>
! 27: #include <utils/debug.h>
! 28:
! 29: #ifdef WIN32
! 30: # define DEFAULT_TNC_CONFIG "tnc_config"
! 31: #else
! 32: # define DEFAULT_TNC_CONFIG "/etc/tnc_config"
! 33: #endif
! 34:
! 35: typedef struct private_tnc_t private_tnc_t;
! 36:
! 37: typedef tnccs_manager_t *(*tnc_create_tnccs_manager_t)(void);
! 38: typedef imc_manager_t *(*tnc_create_imc_manager_t)(void);
! 39: typedef imv_manager_t *(*tnc_create_imv_manager_t)(void);
! 40:
! 41: /**
! 42: * Private additions to tnc_t.
! 43: */
! 44: struct private_tnc_t {
! 45:
! 46: /**
! 47: * Public members of tnc_t.
! 48: */
! 49: tnc_t public;
! 50:
! 51: /**
! 52: * Number of times we have been initialized
! 53: */
! 54: refcount_t ref;
! 55: };
! 56:
! 57: /**
! 58: * Register plugins if built statically
! 59: */
! 60: #ifdef STATIC_PLUGIN_CONSTRUCTORS
! 61: #include "plugin_constructors.c"
! 62: #endif
! 63:
! 64: /**
! 65: * Single instance of tnc_t.
! 66: */
! 67: tnc_t *tnc;
! 68:
! 69: /**
! 70: * Described in header.
! 71: */
! 72: void libtnccs_init(void)
! 73: {
! 74: private_tnc_t *this;
! 75:
! 76: if (tnc)
! 77: { /* already initialized, increase refcount */
! 78: this = (private_tnc_t*)tnc;
! 79: ref_get(&this->ref);
! 80: return;
! 81: }
! 82:
! 83: INIT(this,
! 84: .public = {
! 85: },
! 86: .ref = 1,
! 87: );
! 88: tnc = &this->public;
! 89: lib->settings->add_fallback(lib->settings, "%s.tnc", "libtnccs", lib->ns);
! 90: lib->settings->add_fallback(lib->settings, "%s.plugins", "libtnccs.plugins",
! 91: lib->ns);
! 92: }
! 93:
! 94: /**
! 95: * Described in header.
! 96: */
! 97: void libtnccs_deinit(void)
! 98: {
! 99: private_tnc_t *this = (private_tnc_t*)tnc;
! 100:
! 101: if (!this || !ref_put(&this->ref))
! 102: { /* have more users */
! 103: return;
! 104: }
! 105:
! 106: free(this);
! 107: tnc = NULL;
! 108: }
! 109:
! 110: static bool load_imcvs_from_config(char *filename, bool is_imc)
! 111: {
! 112: bool success = FALSE;
! 113: int line_nr = 0;
! 114: chunk_t *src, line;
! 115: char *label;
! 116:
! 117: if (!filename || !*filename)
! 118: {
! 119: return TRUE;
! 120: }
! 121:
! 122: label = is_imc ? "IMC" : "IMV";
! 123:
! 124: DBG1(DBG_TNC, "loading %ss from '%s'", label, filename);
! 125: src = chunk_map(filename, FALSE);
! 126: if (!src)
! 127: {
! 128: DBG1(DBG_TNC, "opening configuration file '%s' failed: %s", filename,
! 129: strerror(errno));
! 130: return FALSE;
! 131: }
! 132:
! 133: while (fetchline(src, &line))
! 134: {
! 135: char *name, *path;
! 136: chunk_t token;
! 137:
! 138: line_nr++;
! 139:
! 140: /* skip comments or empty lines */
! 141: if (*line.ptr == '#' || !eat_whitespace(&line))
! 142: {
! 143: continue;
! 144: }
! 145:
! 146: /* determine keyword */
! 147: if (!extract_token(&token, ' ', &line))
! 148: {
! 149: DBG1(DBG_TNC, "line %d: keyword must be followed by a space",
! 150: line_nr);
! 151: break;
! 152: }
! 153:
! 154: /* only interested in IMCs or IMVs depending on label */
! 155: if (!match(label, &token))
! 156: {
! 157: continue;
! 158: }
! 159:
! 160: /* advance to the IMC/IMV name and extract it */
! 161: if (!extract_token(&token, '"', &line) ||
! 162: !extract_token(&token, '"', &line))
! 163: {
! 164: DBG1(DBG_TNC, "line %d: %s name must be set in double quotes",
! 165: line_nr, label);
! 166: break;
! 167: }
! 168:
! 169: /* copy the IMC/IMV name */
! 170: name = strndup(token.ptr, token.len);
! 171:
! 172: /* advance to the IMC/IMV path and extract it */
! 173: if (!eat_whitespace(&line))
! 174: {
! 175: DBG1(DBG_TNC, "line %d: %s path is missing", line_nr, label);
! 176: free(name);
! 177: break;
! 178: }
! 179: if (!extract_token(&token, ' ', &line))
! 180: {
! 181: token = line;
! 182: }
! 183:
! 184: /* copy the IMC/IMV path */
! 185: path = strndup(token.ptr, token.len);
! 186:
! 187: /* load and register an IMC/IMV instance */
! 188: if (is_imc)
! 189: {
! 190: success = tnc->imcs->load(tnc->imcs, name, path);
! 191: }
! 192: else
! 193: {
! 194: success = tnc->imvs->load(tnc->imvs, name, path);
! 195: }
! 196: free(name);
! 197: free(path);
! 198: if (!success)
! 199: {
! 200: break;
! 201: }
! 202: }
! 203: chunk_unmap(src);
! 204: return success;
! 205: }
! 206:
! 207: /**
! 208: * Described in header.
! 209: */
! 210: bool tnc_manager_register(plugin_t *plugin, plugin_feature_t *feature,
! 211: bool reg, void *data)
! 212: {
! 213: bool load_imcvs = FALSE;
! 214: bool is_imc = FALSE;
! 215:
! 216: if (feature->type == FEATURE_CUSTOM)
! 217: {
! 218: if (streq(feature->arg.custom, "tnccs-manager"))
! 219: {
! 220: if (reg)
! 221: {
! 222: tnc->tnccs = ((tnc_create_tnccs_manager_t)data)();
! 223: }
! 224: else
! 225: {
! 226: tnc->tnccs->destroy(tnc->tnccs);
! 227: tnc->tnccs = NULL;
! 228: }
! 229: }
! 230: else if (streq(feature->arg.custom, "imc-manager"))
! 231: {
! 232: if (reg)
! 233: {
! 234: tnc->imcs = ((tnc_create_imc_manager_t)data)();
! 235: is_imc = TRUE;
! 236: load_imcvs = TRUE;
! 237: }
! 238: else
! 239: {
! 240: tnc->imcs->destroy(tnc->imcs);
! 241: tnc->imcs = NULL;
! 242: }
! 243: }
! 244: else if (streq(feature->arg.custom, "imv-manager"))
! 245: {
! 246: if (reg)
! 247: {
! 248: tnc->imvs = ((tnc_create_imv_manager_t)data)();
! 249: is_imc = FALSE;
! 250: load_imcvs = TRUE;
! 251: }
! 252: else
! 253: {
! 254: tnc->imvs->destroy(tnc->imvs);
! 255: tnc->imvs = NULL;
! 256: }
! 257: }
! 258: else
! 259: {
! 260: return FALSE;
! 261: }
! 262:
! 263: if (load_imcvs)
! 264: {
! 265: load_imcvs_from_config(
! 266: lib->settings->get_str(lib->settings,
! 267: "%s.tnc.tnc_config", DEFAULT_TNC_CONFIG, lib->ns),
! 268: is_imc);
! 269: }
! 270: }
! 271: return TRUE;
! 272: }
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