Annotation of embedaddon/strongswan/src/libfast/fast_session.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2007 Martin Willi
! 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
! 17:
! 18: #include "fast_session.h"
! 19:
! 20: #include <string.h>
! 21: #include <fcgiapp.h>
! 22: #include <stdio.h>
! 23:
! 24: #include <collections/linked_list.h>
! 25:
! 26: #define COOKIE_LEN 16
! 27:
! 28: typedef struct private_fast_session_t private_fast_session_t;
! 29:
! 30: /**
! 31: * private data of the task manager
! 32: */
! 33: struct private_fast_session_t {
! 34:
! 35: /**
! 36: * public functions
! 37: */
! 38: fast_session_t public;
! 39:
! 40: /**
! 41: * session ID
! 42: */
! 43: char sid[COOKIE_LEN * 2 + 1];
! 44:
! 45: /**
! 46: * have we sent the session cookie?
! 47: */
! 48: bool cookie_sent;
! 49:
! 50: /**
! 51: * list of controller instances controller_t
! 52: */
! 53: linked_list_t *controllers;
! 54:
! 55: /**
! 56: * list of filter instances filter_t
! 57: */
! 58: linked_list_t *filters;
! 59:
! 60: /**
! 61: * user defined session context
! 62: */
! 63: fast_context_t *context;
! 64: };
! 65:
! 66: METHOD(fast_session_t, add_controller, void,
! 67: private_fast_session_t *this, fast_controller_t *controller)
! 68: {
! 69: this->controllers->insert_last(this->controllers, controller);
! 70: }
! 71:
! 72: METHOD(fast_session_t, add_filter, void,
! 73: private_fast_session_t *this, fast_filter_t *filter)
! 74: {
! 75: this->filters->insert_last(this->filters, filter);
! 76: }
! 77:
! 78: /**
! 79: * Create a session ID and a cookie
! 80: */
! 81: static bool create_sid(private_fast_session_t *this)
! 82: {
! 83: char buf[COOKIE_LEN];
! 84: rng_t *rng;
! 85:
! 86: rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
! 87: if (!rng)
! 88: {
! 89: return FALSE;
! 90: }
! 91: if (!rng->get_bytes(rng, sizeof(buf), buf))
! 92: {
! 93: rng->destroy(rng);
! 94: return FALSE;
! 95: }
! 96: rng->destroy(rng);
! 97: chunk_to_hex(chunk_create(buf, sizeof(buf)), this->sid, FALSE);
! 98: return TRUE;
! 99: }
! 100:
! 101: /**
! 102: * run all registered filters
! 103: */
! 104: static bool run_filter(private_fast_session_t *this, fast_request_t *request,
! 105: char *p0, char *p1, char *p2, char *p3, char *p4, char *p5)
! 106: {
! 107: enumerator_t *enumerator;
! 108: fast_filter_t *filter;
! 109:
! 110: enumerator = this->filters->create_enumerator(this->filters);
! 111: while (enumerator->enumerate(enumerator, &filter))
! 112: {
! 113: if (!filter->run(filter, request, p0, p1, p2, p3, p4, p5))
! 114: {
! 115: enumerator->destroy(enumerator);
! 116: return FALSE;
! 117: }
! 118: }
! 119: enumerator->destroy(enumerator);
! 120: return TRUE;
! 121: }
! 122:
! 123: METHOD(fast_session_t, process, void,
! 124: private_fast_session_t *this, fast_request_t *request)
! 125: {
! 126: char *pos, *start, *param[6] = {NULL, NULL, NULL, NULL, NULL, NULL};
! 127: enumerator_t *enumerator;
! 128: bool handled = FALSE;
! 129: fast_controller_t *current;
! 130: int i = 0;
! 131:
! 132: if (!this->cookie_sent)
! 133: {
! 134: request->add_cookie(request, "SID", this->sid);
! 135: this->cookie_sent = TRUE;
! 136: }
! 137:
! 138: start = request->get_path(request);
! 139: if (start)
! 140: {
! 141: if (*start == '/')
! 142: {
! 143: start++;
! 144: }
! 145: while ((pos = strchr(start, '/')) != NULL && i < 5)
! 146: {
! 147: param[i++] = strndupa(start, pos - start);
! 148: start = pos + 1;
! 149: }
! 150: param[i] = strdupa(start);
! 151:
! 152: if (run_filter(this, request, param[0], param[1], param[2], param[3],
! 153: param[4], param[5]))
! 154: {
! 155: enumerator = this->controllers->create_enumerator(this->controllers);
! 156: while (enumerator->enumerate(enumerator, ¤t))
! 157: {
! 158: if (streq(current->get_name(current), param[0]))
! 159: {
! 160: current->handle(current, request, param[1], param[2],
! 161: param[3], param[4], param[5]);
! 162: handled = TRUE;
! 163: break;
! 164: }
! 165: }
! 166: enumerator->destroy(enumerator);
! 167: }
! 168: else
! 169: {
! 170: handled = TRUE;
! 171: }
! 172: }
! 173: if (!handled)
! 174: {
! 175: if (this->controllers->get_first(this->controllers,
! 176: (void**)¤t) == SUCCESS)
! 177: {
! 178: request->streamf(request,
! 179: "Status: 301 Moved permanently\nLocation: %s/%s\n\n",
! 180: request->get_base(request), current->get_name(current));
! 181: }
! 182: }
! 183: }
! 184:
! 185: METHOD(fast_session_t, get_sid, char*,
! 186: private_fast_session_t *this)
! 187: {
! 188: return this->sid;
! 189: }
! 190:
! 191: METHOD(fast_session_t, destroy, void,
! 192: private_fast_session_t *this)
! 193: {
! 194: this->controllers->destroy_offset(this->controllers,
! 195: offsetof(fast_controller_t, destroy));
! 196: this->filters->destroy_offset(this->filters,
! 197: offsetof(fast_filter_t, destroy));
! 198: DESTROY_IF(this->context);
! 199: free(this);
! 200: }
! 201:
! 202: /*
! 203: * see header file
! 204: */
! 205: fast_session_t *fast_session_create(fast_context_t *context)
! 206: {
! 207: private_fast_session_t *this;
! 208:
! 209: INIT(this,
! 210: .public = {
! 211: .add_controller = _add_controller,
! 212: .add_filter = _add_filter,
! 213: .process = _process,
! 214: .get_sid = _get_sid,
! 215: .destroy = _destroy,
! 216: },
! 217: .controllers = linked_list_create(),
! 218: .filters = linked_list_create(),
! 219: .context = context,
! 220: );
! 221: if (!create_sid(this))
! 222: {
! 223: destroy(this);
! 224: return NULL;
! 225: }
! 226:
! 227: return &this->public;
! 228: }
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