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version 1.1.2.1, 2010/10/27 13:10:40
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version 1.3, 2012/07/22 22:46:47
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/************************************************************************* |
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* (C) 2010 AITNET - Sofia/Bulgaria - <office@aitbg.com> |
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* by Michael Pounov <misho@aitbg.com> |
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* |
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* $Author$ |
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* $Id$ |
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* |
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************************************************************************* |
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The ELWIX and AITNET software is distributed under the following |
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terms: |
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|
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All of the documentation and software included in the ELWIX and AITNET |
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Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org> |
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|
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Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
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by Michael Pounov <misho@elwix.org>. All rights reserved. |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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1. Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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2. Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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3. All advertising materials mentioning features or use of this software |
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must display the following acknowledgement: |
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This product includes software developed by Michael Pounov <misho@elwix.org> |
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ELWIX - Embedded LightWeight unIX and its contributors. |
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4. Neither the name of AITNET nor the names of its contributors |
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may be used to endorse or promote products derived from this software |
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without specific prior written permission. |
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|
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THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND |
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGE. |
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*/ |
| #include "global.h" |
#include "global.h" |
| #include "dwds.h" |
#include "dwds.h" |
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|
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|
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cfg_root_t cfg; |
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int Verbose, Kill, nif; |
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char **ifs, szConfig[MAXPATHLEN] = DWDS_CONFIG; |
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extern char compiled[], compiledby[], compilehost[]; |
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|
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|
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static void |
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Usage() |
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{ |
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printf( "-= dWDS =- WiFi dynamic WDS service managment for VAP\n" |
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"=== %s === %s@%s ===\n\n" |
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" Syntax: dwds [options] <interface|any> [interface [ath0, ...]]\n" |
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"\n" |
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"\t-v\t\tVerbose ...\n" |
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"\t-f\t\tForeground, not demonize process ...\n" |
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"\t-c <config>\tConfig file [default=/etc/dwds.conf]\n" |
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"\n", compiled, compiledby, compilehost); |
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} |
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|
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static void |
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sigHandler(int sig) |
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{ |
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int stat; |
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ait_val_t name; |
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const char *v; |
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|
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switch (sig) { |
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case SIGHUP: |
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cfgUnloadConfig(&cfg); |
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if (cfgLoadConfig(szConfig, &cfg)) { |
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printf("Error:: can`t load config %s ...\n", szConfig); |
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Kill++; |
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} else { |
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closelog(); |
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|
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cfg_loadAttribute(&cfg, "dwds", "name", &name, DWDS_NAME); |
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openlog(AIT_GET_STR(&name), LOG_PID | LOG_CONS, LOG_DAEMON); |
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AIT_FREE_VAL(&name); |
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v = cfg_getAttribute(&cfg, "dwds", "syslog_upto"); |
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setlogmask(v ? strtol(v, NULL, 0) : 0); |
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} |
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break; |
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case SIGTERM: |
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Kill++; |
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break; |
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case SIGCHLD: |
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while (waitpid(-1, &stat, WNOHANG) > 0); |
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break; |
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} |
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} |
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|
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static int |
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RtMsg(struct dwds_if **wds, struct rt_msghdr *msg, size_t len) |
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{ |
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struct if_announcemsghdr *ifan; |
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const char *v; |
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struct ether_addr bssid; |
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ait_val_t Str, Ident; |
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char szCmd[MAXPATHLEN] = { 0 }, szName[IFNAMSIZ] = { 0 }; |
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int f, stat; |
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|
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assert(wds); |
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assert(msg); |
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|
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if (msg->rtm_version != RTM_VERSION) { |
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syslog(LOG_ERR, "Error:: routing message version %d not understood!\n", msg->rtm_version); |
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return -1; |
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} |
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|
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switch (msg->rtm_type) { |
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case RTM_IFANNOUNCE: |
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ifan = (struct if_announcemsghdr*) msg; |
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switch (ifan->ifan_what) { |
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case IFAN_ARRIVAL: |
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VERB(1) syslog(LOG_INFO, "RTM_IFANNOUNCE: if# %d, what: arrival\n", |
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ifan->ifan_index); |
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break; |
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case IFAN_DEPARTURE: |
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VERB(1) syslog(LOG_INFO, "RTM_IFANNOUNCE: if# %d, what: departure\n", |
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ifan->ifan_index); |
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wifi_destroyWDS(ifan->ifan_name, wds); |
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break; |
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} |
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break; |
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case RTM_IEEE80211: |
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#define V(type) ((struct type *)(&ifan[1])) |
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ifan = (struct if_announcemsghdr*) msg; |
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switch (ifan->ifan_what) { |
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case RTM_IEEE80211_DISASSOC: |
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v = cfg_getAttribute(&cfg, "dwds", "discover_on_join"); |
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if (!v || !strtol(v, NULL, 0)) |
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break; |
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/* fall thru ... */ |
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case RTM_IEEE80211_LEAVE: |
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if (!wifi_chkIface(ifan->ifan_name, ifs, nif)) |
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break; |
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memcpy(&bssid, V(ieee80211_leave_event)->iev_addr, ETHER_ADDR_LEN); |
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VERB(1) syslog(LOG_INFO, "BSSID:%s Station leave\n", ether_ntoa(&bssid)); |
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if (!wifi_leaveWDS(bssid, wds, szName, IFNAMSIZ)) { |
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cfg_loadAttribute(&cfg, "dwds", "name", &Ident, DWDS_NAME); |
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/* delete state file ... */ |
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v = cfg_getAttribute(&cfg, "dwds", "state_dir"); |
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if (v) { |
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memset(szCmd, 0, STRSIZ); |
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snprintf(szCmd, MAXPATHLEN, "%s/%s-%s-%s", v, szName, |
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ether_ntoa(&bssid), AIT_GET_STR(&Ident)); |
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unlink(szCmd); |
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VERB(2) syslog(LOG_DEBUG, "Debug:: delete session name %s\n", szCmd); |
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} |
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|
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/* Launch script ... */ |
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cfg_loadAttribute(&cfg, "dwds", "disassoc_event", &Str, NULL); |
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if (!AIT_ISEMPTY(&Str)) { |
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memset(szCmd, 0, MAXPATHLEN); |
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snprintf(szCmd, MAXPATHLEN, "%s %s %s %s", AIT_GET_STR(&Str), |
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szName, ether_ntoa(&bssid), AIT_GET_STR(&Ident)); |
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VERB(3) syslog(LOG_DEBUG, "Debug:: Command line: %s\n", szCmd); |
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|
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if ((stat = system(szCmd))) |
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syslog(LOG_ERR, "VAP down script %s exited " |
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"with status %d\n", |
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AIT_GET_STR(&Str), stat); |
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AIT_FREE_VAL(&Str); |
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} |
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AIT_FREE_VAL(&Ident); |
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} |
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break; |
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|
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case RTM_IEEE80211_JOIN: |
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case RTM_IEEE80211_REJOIN: |
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case RTM_IEEE80211_ASSOC: |
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case RTM_IEEE80211_REASSOC: |
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v = cfg_getAttribute(&cfg, "dwds", "discover_on_join"); |
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if (!v || !strtol(v, NULL, 0)) |
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break; |
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/* fall thru ... */ |
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case RTM_IEEE80211_WDS: |
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memcpy(&bssid, V(ieee80211_leave_event)->iev_addr, ETHER_ADDR_LEN); |
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VERB(1) syslog(LOG_INFO, "BSSID:%s WDS discovery\n", ether_ntoa(&bssid)); |
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if (!wifi_chkIface(ifan->ifan_name, ifs, nif)) |
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break; |
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if (!wifi_createWDS(ifan->ifan_name, bssid, wds)) { |
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cfg_loadAttribute(&cfg, "dwds", "name", &Ident, DWDS_NAME); |
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/* create state file ... */ |
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v = cfg_getAttribute(&cfg, "dwds", "state_dir"); |
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if (v) { |
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memset(szCmd, 0, MAXPATHLEN); |
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snprintf(szCmd, MAXPATHLEN, "%s/%s-%s-%s", (char*) v, |
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(*wds)->if_name, ether_ntoa(&bssid), |
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AIT_GET_STR(&Ident)); |
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f = open(szCmd, O_WRONLY | O_CREAT, 0644); |
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if (f != -1) |
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close(f); |
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VERB(2) syslog(LOG_DEBUG, "Debug:: create session name %s\n", szCmd); |
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} |
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|
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/* Launch script ... */ |
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cfg_loadAttribute(&cfg, "dwds", "assoc_event", &Str, NULL); |
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if (!AIT_ISEMPTY(&Str)) { |
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memset(szCmd, 0, MAXPATHLEN); |
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snprintf(szCmd, MAXPATHLEN, "%s %s %s %s", AIT_GET_STR(&Str), |
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(*wds)->if_name, ether_ntoa(&bssid), |
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AIT_GET_STR(&Ident)); |
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VERB(3) syslog(LOG_DEBUG, "Debug:: Command line: %s\n", szCmd); |
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|
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if ((stat = system(szCmd))) |
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syslog(LOG_ERR, "VAP up script %s exited " |
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"with status %d\n", |
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AIT_GET_STR(&Str), stat); |
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AIT_FREE_VAL(&Str); |
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} |
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AIT_FREE_VAL(&Ident); |
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} |
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break; |
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} |
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#undef V |
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break; |
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} |
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|
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return 0; |
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} |
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|
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|
| int |
int |
| main(int argc, char **argv) |
main(int argc, char **argv) |
| { |
{ |
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char ch, fg = 0; |
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ait_val_t Ident; |
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const char *v, msg[2048]; |
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int s; |
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struct sigaction sa; |
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size_t len; |
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struct dwds_if *wds = NULL; |
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|
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while ((ch = getopt(argc, argv, "hvfc:")) != -1) |
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switch (ch) { |
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case 'v': |
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Verbose++; |
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break; |
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case 'f': |
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fg = 1; |
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break; |
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case 'c': |
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strlcpy(szConfig, optarg, MAXPATHLEN); |
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break; |
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case 'h': |
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default: |
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Usage(); |
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return 1; |
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} |
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argc -= optind; |
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argv += optind; |
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if (!argc) { |
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printf("Error:: not specified interface for use ...\n"); |
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Usage(); |
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return 1; |
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} else { |
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nif = argc; |
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ifs = argv; |
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} |
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if (cfgLoadConfig(szConfig, &cfg)) { |
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printf("Error:: can`t load config %s ...\n", szConfig); |
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return 1; |
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} |
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|
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if (!fg) |
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switch (fork()) { |
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case -1: |
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printf("Error:: when fork() #%d - %s\n", errno, strerror(errno)); |
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cfgUnloadConfig(&cfg); |
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return 2; |
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case 0 : |
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VERB(1) printf("Going to shadow land ...\n"); |
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|
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setsid(); |
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|
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memset(&sa, 0, sizeof sa); |
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sa.sa_handler = sigHandler; |
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sigemptyset(&sa.sa_mask); |
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sigaction(SIGHUP, &sa, NULL); |
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sigaction(SIGTERM, &sa, NULL); |
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sigaction(SIGCHLD, &sa, NULL); |
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break; |
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default: |
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goto end; |
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} |
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|
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cfg_loadAttribute(&cfg, "dwds", "name", &Ident, DWDS_NAME); |
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openlog(AIT_GET_STR(&Ident), LOG_PID | LOG_CONS, LOG_DAEMON); |
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AIT_FREE_VAL(&Ident); |
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v = cfg_getAttribute(&cfg, "dwds", "syslog_upto"); |
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setlogmask(v ? strtol(v, NULL, 0) : 0); |
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|
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s = socket(PF_ROUTE, SOCK_RAW, 0); |
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if (s == -1) { |
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syslog(LOG_ERR, "Error:: socket() #%d - %s\n", errno, strerror(errno)); |
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goto end; |
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} |
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|
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if (!(wds = wifi_buildWDS(s, ifs, nif))) { |
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syslog(LOG_ERR, "Error:: Go to dead ...\n"); |
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goto end; |
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} |
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|
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while (!Kill) { |
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len = read(s, (void*) msg, sizeof msg); |
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if (len == -1) { |
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VERB(5) syslog(LOG_ERR, "Error:: read() #%d - %s\n", errno, strerror(errno)); |
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Kill++; |
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} else |
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RtMsg(&wds, (struct rt_msghdr*) msg, len); |
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} |
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|
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close(s); |
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end: |
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closelog(); |
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cfgUnloadConfig(&cfg); |
| return 0; |
return 0; |
| } |
} |
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