The Tcpdump Group git mirrors - libpcap/blob - rpcap/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 <string.h>
  40 #include <signal.h>
  41 #include <pcap.h>               // for PCAP_ERRBUF_SIZE
  42
  43 #include "portability.h"
  44 #include "rpcapd.h"
  45 #include "fileconf.h"
  46 #include "sockutils.h"          // for SOCK_ASSERT
  47 #include "rpcap-protocol.h"
  48
  49 static int strrem(char *string, char chr);
  50
  51 void fileconf_read(int sign)
  52 {
  53         FILE *fp;
  54         char msg[PCAP_ERRBUF_SIZE + 1];
  55         int i;
  56
  57 #ifndef _WIN32
  58         signal(SIGHUP, fileconf_read);
  59 #endif
  60
  61         if ((fp = fopen(loadfile, "r")) != NULL)
  62         {
  63                 char line[MAX_LINE + 1];
  64                 char *ptr;
  65
  66                 hostlist[0] = 0;
  67                 i = 0;
  68
  69                 while (fgets(line, MAX_LINE, fp) != NULL)
  70                 {
  71                         if (line[0] == '\n') continue;  // Blank line
  72                         if (line[0] == '\r') continue;  // Blank line
  73                         if (line[0] == '#') continue;   // Comment
  74
  75                         if ((ptr = strstr(line, "ActiveClient")))
  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_ASSERT("Only MAX_ACTIVE_LIST active connections are currently supported.", 1);
  98
  99                                 i++;
 100                                 continue;
 101                         }
 102
 103                         if ((ptr = strstr(line, "PassiveClient")))
 104                         {
 105                                 ptr = strchr(ptr, '=') + 1;
 106                                 strlcat(hostlist, ptr, MAX_HOST_LIST);
 107                                 strlcat(hostlist, ",", MAX_HOST_LIST);
 108                                 continue;
 109                         }
 110
 111                         if ((ptr = strstr(line, "NullAuthPermit")))
 112                         {
 113                                 ptr = strstr(ptr, "YES");
 114                                 if (ptr)
 115                                         nullAuthAllowed = 1;
 116                                 else
 117                                         nullAuthAllowed = 0;
 118                                 continue;
 119                         }
 120                 }
 121
 122                 // clear the remaining fields of the active list
 123                 while (i < MAX_ACTIVE_LIST)
 124                 {
 125                         activelist[i].address[0] = 0;
 126                         activelist[i].port[0] = 0;
 127                         i++;
 128                 }
 129
 130                 // Remove all '\n' and '\r' from the strings
 131                 strrem(hostlist, '\r');
 132                 strrem(hostlist, '\n');
 133
 134                 pcap_snprintf(msg, PCAP_ERRBUF_SIZE, "New passive host list: %s\n\n", hostlist);
 135                 SOCK_ASSERT(msg, 1);
 136                 fclose(fp);
 137         }
 138 }
 139
 140 int fileconf_save(const char *savefile)
 141 {
 142         FILE *fp;
 143
 144         if ((fp = fopen(savefile, "w")) != NULL)
 145         {
 146                 char *token; /*, *port;*/                                       // temp, needed to separate items into the hostlist
 147                 char temphostlist[MAX_HOST_LIST + 1];
 148                 int i = 0;
 149                 char *lasts;
 150
 151                 fprintf(fp, "# Configuration file help.\n\n");
 152
 153                 // Save list of clients which are allowed to connect to us in passive mode
 154                 fprintf(fp, "# Hosts which are allowed to connect to this server (passive mode)\n");
 155                 fprintf(fp, "# Format: PassiveClient = <name or address>\n\n");
 156
 157                 strncpy(temphostlist, hostlist, MAX_HOST_LIST);
 158                 temphostlist[MAX_HOST_LIST] = 0;
 159
 160                 token = pcap_strtok_r(temphostlist, RPCAP_HOSTLIST_SEP, &lasts);
 161                 while(token != NULL)
 162                 {
 163                         fprintf(fp, "PassiveClient = %s\n", token);
 164                         token = pcap_strtok_r(NULL, RPCAP_HOSTLIST_SEP, &lasts);
 165                 }
 166
 167
 168                 // Save list of clients which are allowed to connect to us in active mode
 169                 fprintf(fp, "\n\n");
 170                 fprintf(fp, "# Hosts to which this server is trying to connect to (active mode)\n");
 171                 fprintf(fp, "# Format: ActiveClient = <name or address>, <port | DEFAULT>\n\n");
 172
 173
 174                 while ((activelist[i].address[0] != 0) && (i < MAX_ACTIVE_LIST))
 175                 {
 176                         fprintf(fp, "ActiveClient = %s, %s\n", activelist[i].address, activelist[i].port);
 177                         i++;
 178                 }
 179
 180                 // Save if we want to permit NULL authentication
 181                 fprintf(fp, "\n\n");
 182                 fprintf(fp, "# Permit NULL authentication: YES or NOT\n\n");
 183
 184                 if (nullAuthAllowed)
 185                         fprintf(fp, "NullAuthPermit = YES\n");
 186                 else
 187                         fprintf(fp, "NullAuthPermit = NO\n");
 188
 189                 fclose(fp);
 190                 return 0;
 191         }
 192         else
 193         {
 194                 return -1;
 195         }
 196
 197 }
 198
 199 static int strrem(char *string, char chr)
 200 {
 201         char *pos;
 202         int num = 0;
 203         int len, i;
 204
 205         while ((pos = strchr(string, chr)) != NULL)
 206         {
 207                 num++;
 208                 len = strlen(pos);
 209                 for (i = 0; i < len; i++)
 210                         pos[i] = pos[i+1];
 211         }
 212
 213         return num;
 214 }