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_MESSAGE
  46 #include "portability.h"
  47 #include "rpcapd.h"
  48 #include "fileconf.h"
  49 #include "rpcap-protocol.h"
  50
  51 static int strrem(char *string, char chr);
  52
  53 void fileconf_read(void)
  54 {
  55         FILE *fp;
  56         char msg[PCAP_ERRBUF_SIZE + 1];
  57         int i;
  58
  59         if ((fp = fopen(loadfile, "r")) != NULL)
  60         {
  61                 char line[MAX_LINE + 1];
  62                 char *ptr;
  63
  64                 hostlist[0] = 0;
  65                 i = 0;
  66
  67                 while (fgets(line, MAX_LINE, fp) != NULL)
  68                 {
  69                         if (line[0] == '\n') continue;  // Blank line
  70                         if (line[0] == '\r') continue;  // Blank line
  71                         if (line[0] == '#') continue;   // Comment
  72
  73                         ptr = strstr(line, "ActiveClient");
  74                         if (ptr)
  75                         {
  76                                 char *address, *port;
  77                                 char *lasts;
  78
  79                                 ptr = strchr(ptr, '=') + 1;
  80                                 address = pcap_strtok_r(ptr, RPCAP_HOSTLIST_SEP, &lasts);
  81
  82                                 if ((address != NULL) && (i < MAX_ACTIVE_LIST))
  83                                 {
  84                                         port = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
  85                                         strlcpy(activelist[i].address, address, MAX_LINE);
  86
  87                                         if (strcmp(port, "DEFAULT") == 0) // the user choose a custom port
  88                                                 strlcpy(activelist[i].port, RPCAP_DEFAULT_NETPORT_ACTIVE, MAX_LINE);
  89                                         else
  90                                                 strlcpy(activelist[i].port, port, MAX_LINE);
  91
  92                                         activelist[i].address[MAX_LINE] = 0;
  93                                         activelist[i].port[MAX_LINE] = 0;
  94                                 }
  95                                 else
  96                                         SOCK_MESSAGE("Only MAX_ACTIVE_LIST active connections are currently supported.");
  97
  98                                 i++;
  99                                 continue;
 100                         }
 101
 102                         ptr = strstr(line, "PassiveClient");
 103                         if (ptr)
 104                         {
 105                                 ptr = strchr(ptr, '=') + 1;
 106                                 strlcat(hostlist, ptr, MAX_HOST_LIST);
 107                                 strlcat(hostlist, ",", MAX_HOST_LIST);
 108                                 continue;
 109                         }
 110
 111                         ptr = strstr(line, "NullAuthPermit");
 112                         if (ptr)
 113                         {
 114                                 ptr = strstr(ptr, "YES");
 115                                 if (ptr)
 116                                         nullAuthAllowed = 1;
 117                                 else
 118                                         nullAuthAllowed = 0;
 119                                 continue;
 120                         }
 121                 }
 122
 123                 // clear the remaining fields of the active list
 124                 while (i < MAX_ACTIVE_LIST)
 125                 {
 126                         activelist[i].address[0] = 0;
 127                         activelist[i].port[0] = 0;
 128                         i++;
 129                 }
 130
 131                 // Remove all '\n' and '\r' from the strings
 132                 strrem(hostlist, '\r');
 133                 strrem(hostlist, '\n');
 134
 135                 pcap_snprintf(msg, PCAP_ERRBUF_SIZE, "New passive host list: %s\n\n", hostlist);
 136                 SOCK_MESSAGE(msg);
 137                 fclose(fp);
 138         }
 139 }
 140
 141 int fileconf_save(const char *savefile)
 142 {
 143         FILE *fp;
 144
 145         if ((fp = fopen(savefile, "w")) != NULL)
 146         {
 147                 char *token; /*, *port;*/                                       // temp, needed to separate items into the hostlist
 148                 char temphostlist[MAX_HOST_LIST + 1];
 149                 int i = 0;
 150                 char *lasts;
 151
 152                 fprintf(fp, "# Configuration file help.\n\n");
 153
 154                 // Save list of clients which are allowed to connect to us in passive mode
 155                 fprintf(fp, "# Hosts which are allowed to connect to this server (passive mode)\n");
 156                 fprintf(fp, "# Format: PassiveClient = <name or address>\n\n");
 157
 158                 strncpy(temphostlist, hostlist, MAX_HOST_LIST);
 159                 temphostlist[MAX_HOST_LIST] = 0;
 160
 161                 token = pcap_strtok_r(temphostlist, RPCAP_HOSTLIST_SEP, &lasts);
 162                 while(token != NULL)
 163                 {
 164                         fprintf(fp, "PassiveClient = %s\n", token);
 165                         token = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
 166                 }
 167
 168
 169                 // Save list of clients which are allowed to connect to us in active mode
 170                 fprintf(fp, "\n\n");
 171                 fprintf(fp, "# Hosts to which this server is trying to connect to (active mode)\n");
 172                 fprintf(fp, "# Format: ActiveClient = <name or address>, <port | DEFAULT>\n\n");
 173
 174
 175                 while ((i < MAX_ACTIVE_LIST) && (activelist[i].address[0] != 0))
 176                 {
 177                         fprintf(fp, "ActiveClient = %s, %s\n", activelist[i].address, activelist[i].port);
 178                         i++;
 179                 }
 180
 181                 // Save if we want to permit NULL authentication
 182                 fprintf(fp, "\n\n");
 183                 fprintf(fp, "# Permit NULL authentication: YES or NOT\n\n");
 184
 185                 if (nullAuthAllowed)
 186                         fprintf(fp, "NullAuthPermit = YES\n");
 187                 else
 188                         fprintf(fp, "NullAuthPermit = NO\n");
 189
 190                 fclose(fp);
 191                 return 0;
 192         }
 193         else
 194         {
 195                 return -1;
 196         }
 197
 198 }
 199
 200 static int strrem(char *string, char chr)
 201 {
 202         char *pos;
 203         int num = 0;
 204         int len, i;
 205
 206         while ((pos = strchr(string, chr)) != NULL)
 207         {
 208                 num++;
 209                 len = strlen(pos);
 210                 for (i = 0; i < len; i++)
 211                         pos[i] = pos[i+1];
 212         }
 213
 214         return num;
 215 }