The Tcpdump Group git mirrors - libpcap/blob - rpcapd/fileconf.c

   1 /*
   2  * Copyright (c) 1987, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include "ftmacros.h"
  39
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <signal.h>
  43 #include <pcap.h>               // for PCAP_ERRBUF_SIZE
  44
  45 #include "sockutils.h"          // for SOCK_DEBUG_MESSAGE
  46 #include "portability.h"
  47 #include "rpcapd.h"
  48 #include "config_params.h"      // configuration file parameters
  49 #include "fileconf.h"
  50 #include "rpcap-protocol.h"
  51
  52 static int strrem(char *string, char chr);
  53
  54 void fileconf_read(void)
  55 {
  56         FILE *fp;
  57         char msg[PCAP_ERRBUF_SIZE + 1];
  58         int i;
  59
  60         if ((fp = fopen(loadfile, "r")) != NULL)
  61         {
  62                 char line[MAX_LINE + 1];
  63                 char *ptr;
  64
  65                 hostlist[0] = 0;
  66                 i = 0;
  67
  68                 while (fgets(line, MAX_LINE, fp) != NULL)
  69                 {
  70                         if (line[0] == '\n') continue;  // Blank line
  71                         if (line[0] == '\r') continue;  // Blank line
  72                         if (line[0] == '#') continue;   // Comment
  73
  74                         ptr = strstr(line, "ActiveClient");
  75                         if (ptr)
  76                         {
  77                                 char *address, *port;
  78                                 char *lasts;
  79
  80                                 ptr = strchr(ptr, '=') + 1;
  81                                 address = pcap_strtok_r(ptr, RPCAP_HOSTLIST_SEP, &lasts);
  82
  83                                 if ((address != NULL) && (i < MAX_ACTIVE_LIST))
  84                                 {
  85                                         port = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
  86                                         strlcpy(activelist[i].address, address, MAX_LINE);
  87
  88                                         if (strcmp(port, "DEFAULT") == 0) // the user choose a custom port
  89                                                 strlcpy(activelist[i].port, RPCAP_DEFAULT_NETPORT_ACTIVE, MAX_LINE);
  90                                         else
  91                                                 strlcpy(activelist[i].port, port, MAX_LINE);
  92
  93                                         activelist[i].address[MAX_LINE] = 0;
  94                                         activelist[i].port[MAX_LINE] = 0;
  95                                 }
  96                                 else
  97                                         SOCK_DEBUG_MESSAGE("Only MAX_ACTIVE_LIST active connections are currently supported.");
  98
  99                                 i++;
 100                                 continue;
 101                         }
 102
 103                         ptr = strstr(line, "PassiveClient");
 104                         if (ptr)
 105                         {
 106                                 ptr = strchr(ptr, '=') + 1;
 107                                 strlcat(hostlist, ptr, MAX_HOST_LIST);
 108                                 strlcat(hostlist, ",", MAX_HOST_LIST);
 109                                 continue;
 110                         }
 111
 112                         ptr = strstr(line, "NullAuthPermit");
 113                         if (ptr)
 114                         {
 115                                 ptr = strstr(ptr, "YES");
 116                                 if (ptr)
 117                                         nullAuthAllowed = 1;
 118                                 else
 119                                         nullAuthAllowed = 0;
 120                                 continue;
 121                         }
 122                 }
 123
 124                 // clear the remaining fields of the active list
 125                 while (i < MAX_ACTIVE_LIST)
 126                 {
 127                         activelist[i].address[0] = 0;
 128                         activelist[i].port[0] = 0;
 129                         i++;
 130                 }
 131
 132                 // Remove all '\n' and '\r' from the strings
 133                 strrem(hostlist, '\r');
 134                 strrem(hostlist, '\n');
 135
 136                 pcap_snprintf(msg, PCAP_ERRBUF_SIZE, "New passive host list: %s\n\n", hostlist);
 137                 SOCK_DEBUG_MESSAGE(msg);
 138                 fclose(fp);
 139         }
 140 }
 141
 142 int fileconf_save(const char *savefile)
 143 {
 144         FILE *fp;
 145
 146         if ((fp = fopen(savefile, "w")) != NULL)
 147         {
 148                 char *token; /*, *port;*/                                       // temp, needed to separate items into the hostlist
 149                 char temphostlist[MAX_HOST_LIST + 1];
 150                 int i = 0;
 151                 char *lasts;
 152
 153                 fprintf(fp, "# Configuration file help.\n\n");
 154
 155                 // Save list of clients which are allowed to connect to us in passive mode
 156                 fprintf(fp, "# Hosts which are allowed to connect to this server (passive mode)\n");
 157                 fprintf(fp, "# Format: PassiveClient = <name or address>\n\n");
 158
 159                 strncpy(temphostlist, hostlist, MAX_HOST_LIST);
 160                 temphostlist[MAX_HOST_LIST] = 0;
 161
 162                 token = pcap_strtok_r(temphostlist, RPCAP_HOSTLIST_SEP, &lasts);
 163                 while(token != NULL)
 164                 {
 165                         fprintf(fp, "PassiveClient = %s\n", token);
 166                         token = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
 167                 }
 168
 169
 170                 // Save list of clients which are allowed to connect to us in active mode
 171                 fprintf(fp, "\n\n");
 172                 fprintf(fp, "# Hosts to which this server is trying to connect to (active mode)\n");
 173                 fprintf(fp, "# Format: ActiveClient = <name or address>, <port | DEFAULT>\n\n");
 174
 175
 176                 while ((i < MAX_ACTIVE_LIST) && (activelist[i].address[0] != 0))
 177                 {
 178                         fprintf(fp, "ActiveClient = %s, %s\n", activelist[i].address, activelist[i].port);
 179                         i++;
 180                 }
 181
 182                 // Save if we want to permit NULL authentication
 183                 fprintf(fp, "\n\n");
 184                 fprintf(fp, "# Permit NULL authentication: YES or NOT\n\n");
 185
 186                 if (nullAuthAllowed)
 187                         fprintf(fp, "NullAuthPermit = YES\n");
 188                 else
 189                         fprintf(fp, "NullAuthPermit = NO\n");
 190
 191                 fclose(fp);
 192                 return 0;
 193         }
 194         else
 195         {
 196                 return -1;
 197         }
 198
 199 }
 200
 201 static int strrem(char *string, char chr)
 202 {
 203         char *pos;
 204         int num = 0;
 205         size_t len, i;
 206
 207         while ((pos = strchr(string, chr)) != NULL)
 208         {
 209                 num++;
 210                 len = strlen(pos);
 211                 for (i = 0; i < len; i++)
 212                         pos[i] = pos[i+1];
 213         }
 214
 215         return num;
 216 }