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 <stdio.h>
  39 #include <signal.h>
  40 #include <pcap.h>               // for PCAP_ERRBUF_SIZE
  41
  42 #include "portability.h"        // this includes <string.h>
  43 #include "rpcapd.h"
  44 #include "fileconf.h"
  45 #include "sockutils.h"          // for SOCK_ASSERT
  46 #include "rpcap-protocol.h"
  47
  48 static int strrem(char *string, char chr);
  49
  50 void fileconf_read(int sign)
  51 {
  52         FILE *fp;
  53         char msg[PCAP_ERRBUF_SIZE + 1];
  54         int i;
  55
  56 #ifndef _WIN32
  57         signal(SIGHUP, fileconf_read);
  58 #endif
  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                         if ((ptr = strstr(line, "ActiveClient")))
  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_ASSERT("Only MAX_ACTIVE_LIST active connections are currently supported.", 1);
  97
  98                                 i++;
  99                                 continue;
 100                         }
 101
 102                         if ((ptr = strstr(line, "PassiveClient")))
 103                         {
 104                                 ptr = strchr(ptr, '=') + 1;
 105                                 strlcat(hostlist, ptr, MAX_HOST_LIST);
 106                                 strlcat(hostlist, ",", MAX_HOST_LIST);
 107                                 continue;
 108                         }
 109
 110                         if ((ptr = strstr(line, "NullAuthPermit")))
 111                         {
 112                                 ptr = strstr(ptr, "YES");
 113                                 if (ptr)
 114                                         nullAuthAllowed = 1;
 115                                 else
 116                                         nullAuthAllowed = 0;
 117                                 continue;
 118                         }
 119                 }
 120
 121                 // clear the remaining fields of the active list
 122                 while (i < MAX_ACTIVE_LIST)
 123                 {
 124                         activelist[i].address[0] = 0;
 125                         activelist[i].port[0] = 0;
 126                         i++;
 127                 }
 128
 129                 // Remove all '\n' and '\r' from the strings
 130                 strrem(hostlist, '\r');
 131                 strrem(hostlist, '\n');
 132
 133                 pcap_snprintf(msg, PCAP_ERRBUF_SIZE, "New passive host list: %s\n\n", hostlist);
 134                 SOCK_ASSERT(msg, 1);
 135                 fclose(fp);
 136         }
 137 }
 138
 139 int fileconf_save(const char *savefile)
 140 {
 141         FILE *fp;
 142
 143         if ((fp = fopen(savefile, "w")) != NULL)
 144         {
 145                 char *token; /*, *port;*/                                       // temp, needed to separate items into the hostlist
 146                 char temphostlist[MAX_HOST_LIST + 1];
 147                 int i = 0;
 148                 char *lasts;
 149
 150                 fprintf(fp, "# Configuration file help.\n\n");
 151
 152                 // Save list of clients which are allowed to connect to us in passive mode
 153                 fprintf(fp, "# Hosts which are allowed to connect to this server (passive mode)\n");
 154                 fprintf(fp, "# Format: PassiveClient = <name or address>\n\n");
 155
 156                 strncpy(temphostlist, hostlist, MAX_HOST_LIST);
 157                 temphostlist[MAX_HOST_LIST] = 0;
 158
 159                 token = pcap_strtok_r(temphostlist, RPCAP_HOSTLIST_SEP, &lasts);
 160                 while(token != NULL)
 161                 {
 162                         fprintf(fp, "PassiveClient = %s\n", token);
 163                         token = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
 164                 }
 165
 166
 167                 // Save list of clients which are allowed to connect to us in active mode
 168                 fprintf(fp, "\n\n");
 169                 fprintf(fp, "# Hosts to which this server is trying to connect to (active mode)\n");
 170                 fprintf(fp, "# Format: ActiveClient = <name or address>, <port | DEFAULT>\n\n");
 171
 172
 173                 while ((activelist[i].address[0] != 0) && (i < MAX_ACTIVE_LIST))
 174                 {
 175                         fprintf(fp, "ActiveClient = %s, %s\n", activelist[i].address, activelist[i].port);
 176                         i++;
 177                 }
 178
 179                 // Save if we want to permit NULL authentication
 180                 fprintf(fp, "\n\n");
 181                 fprintf(fp, "# Permit NULL authentication: YES or NOT\n\n");
 182
 183                 if (nullAuthAllowed)
 184                         fprintf(fp, "NullAuthPermit = YES\n");
 185                 else
 186                         fprintf(fp, "NullAuthPermit = NO\n");
 187
 188                 fclose(fp);
 189                 return 0;
 190         }
 191         else
 192         {
 193                 return -1;
 194         }
 195
 196 }
 197
 198 static int strrem(char *string, char chr)
 199 {
 200         char *pos;
 201         int num = 0;
 202         int len, i;
 203
 204         while ((pos = strchr(string, chr)) != NULL)
 205         {
 206                 num++;
 207                 len = strlen(pos);
 208                 for (i = 0; i < len; i++)
 209                         pos[i] = pos[i+1];
 210         }
 211
 212         return num;
 213 }