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Annotation of embedaddon/coova-chilli/src/garden.c, revision 1.1.1.1

1.1       misho       1: /* 
                      2:  * Copyright (C) 2003, 2004, 2005 Mondru AB.
                      3:  * Copyright (c) 2006-2007 David Bird <david@coova.com>
                      4:  * 
                      5:  * The contents of this file may be used under the terms of the GNU
                      6:  * General Public License Version 2, provided that the above copyright
                      7:  * notice and this permission notice is included in all copies or
                      8:  * substantial portions of the software.
                      9:  * 
                     10:  */
                     11: 
                     12: #include "system.h"
                     13: #include "ippool.h"
                     14: #include "radius.h"
                     15: #include "radius_wispr.h"
                     16: #include "radius_chillispot.h"
                     17: #include "redir.h"
                     18: #include "syserr.h"
                     19: #include "dhcp.h"
                     20: #include "cmdline.h"
                     21: #include "chilli.h"
                     22: #include "options.h"
                     23: 
                     24: int pass_through_add(pass_through *ptlist, size_t ptlen, size_t *ptcnt, pass_through *pt) {
                     25:   size_t cnt = *ptcnt;
                     26:   int i;
                     27: 
                     28:   if (cnt >= ptlen) {
                     29:     if (options.debug) 
                     30:       log_dbg("No more room for walled garden entries");
                     31:     return -1;
                     32:   }
                     33: 
                     34:   for (i=0; i < cnt; i++) {
                     35:     if (!memcmp(&ptlist[i],pt,sizeof(pass_through))) {
                     36:       if (options.debug) 
                     37:        log_info("Uamallowed already exists #%d:%d: proto=%d host=%s port=%d", i, ptlen,
                     38:                 pt->proto, inet_ntoa(pt->host), pt->port);
                     39:       return 0;
                     40:     }
                     41:   }
                     42: 
                     43:   if (options.debug) 
                     44:     log_info("Uamallowed IP address #%d:%d: proto=%d host=%s port=%d", cnt, ptlen,
                     45:             pt->proto, inet_ntoa(pt->host), pt->port);
                     46: 
                     47:   memcpy(&ptlist[cnt], pt, sizeof(pass_through));
                     48:   *ptcnt = cnt + 1;
                     49:   return 0;
                     50: }
                     51: 
                     52: int pass_throughs_from_string(pass_through *ptlist, size_t ptlen, size_t *ptcnt, char *s) {
                     53:   struct hostent *host;
                     54:   pass_through pt;
                     55:   char *t, *p1 = NULL, *p2 = NULL;
                     56:   char *p3 = malloc(strlen(s)+1);
                     57:   strcpy(p3, s);
                     58:   p1 = p3;
                     59:   
                     60:   if (options.debug) 
                     61:     log_dbg("Uamallowed %s", s);
                     62:   
                     63:   for ( ; p1; p1 = p2) {
                     64:     
                     65:     /* save the next entry position */
                     66:     if ((p2 = strchr(p1, ','))) { *p2=0; p2++; }
                     67:     
                     68:     /* clear the pass-through entry in case we partitially filled it already */
                     69:     memset(&pt, 0, sizeof(pass_through));
                     70:     
                     71:     /* eat whitespace */
                     72:     while (isspace(*p1)) p1++;
                     73:     
                     74:     /* look for specific protocols */
                     75:     if ((t = strchr(p1, ':'))) { 
                     76:       int pnum = 0;
                     77: 
                     78:       *t = 0;
                     79: 
                     80: #ifdef HAVE_GETPROTOENT      
                     81:       if (1) {
                     82:        struct protoent *proto = getprotobyname(p1);
                     83: 
                     84:        if (!proto && !strchr(p1, '.')) 
                     85:          proto = getprotobynumber(atoi(p1));
                     86: 
                     87:        if (proto) 
                     88:          pnum = proto->p_proto;
                     89:       }
                     90: #else
                     91:       if      (!strcmp(p1,"tcp"))  { pnum = DHCP_IP_TCP;  }
                     92:       else if (!strcmp(p1,"udp"))  { pnum = DHCP_IP_UDP;  }
                     93:       else if (!strcmp(p1,"icmp")) { pnum = DHCP_IP_ICMP; }
                     94: #endif
                     95: 
                     96:       if (pnum > 0) {
                     97:        /* if a protocol, skip ahead */
                     98:        pt.proto = pnum;
                     99:        p1 = t + 1;
                    100:       } else {
                    101:        /* if not a protocol, put the ':' back */
                    102:        *t = ':';
                    103:       }
                    104:     }
                    105:     
                    106:     /* look for an optional port */
                    107:     if ((t = strchr(p1, ':'))) { 
                    108:       pt.port = atoi(t+1); 
                    109:       *t = 0; 
                    110:     }
                    111:     
                    112:     if (strchr(p1, '/')) {     /* parse a network address */
                    113:       if (option_aton(&pt.host, &pt.mask, p1, 0)) {
                    114:        log_err(0, "Invalid uamallowed network address or mask %s!", s);
                    115:        continue;
                    116:       } 
                    117:       if (pass_through_add(ptlist, ptlen, ptcnt, &pt))
                    118:        log_err(0, "Too many pass-throughs! skipped %s", s);
                    119:     }
                    120:     else {     /* otherwise, parse a host ip or hostname */
                    121:       int j = 0;
                    122:       pt.mask.s_addr = 0xffffffff;
                    123: 
                    124:       if (!(host = gethostbyname(p1))) {
                    125:        log_err(errno, "Invalid uamallowed domain or address: %s!", p1);
                    126:        continue;
                    127:       }
                    128: 
                    129:       while (host->h_addr_list[j] != NULL) {
                    130:        pt.host = *((struct in_addr *) host->h_addr_list[j++]);
                    131:        if (pass_through_add(ptlist, ptlen, ptcnt, &pt))
                    132:          log_err(0, "Too many pass-throughs! skipped %s", s);
                    133:       }
                    134:     }
                    135:   }
                    136: 
                    137:   free(p3);
                    138:   return 0;
                    139: }
                    140: