conf.c

   1 /*
   2  * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthias Schmidt <matthias@dragonflybsd.org>, University of Marburg,
   6  * Germany.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <syslog.h>
  42 #include <stdarg.h>
  43
  44 #include "dma.h"
  45
  46 #define DP      ": \t\n"
  47 #define EQS     " \t\n"
  48
  49
  50 /*
  51  * Remove trailing \n's
  52  */
  53 void
  54 trim_line(char *line)
  55 {
  56         size_t linelen;
  57         char *p;
  58
  59         p = line;
  60
  61         if ((p = strchr(line, '\n')))
  62                 *p = (char)0;
  63
  64         /* Escape leading dot in every case */
  65         linelen = strlen(line);
  66         if (line[0] == '.') {
  67                 if ((linelen + 2) > 1000) {
  68                         syslog(LOG_CRIT, "Cannot escape leading dot.  Buffer overflow");
  69                         exit(1);
  70                 }
  71                 memmove((line + 1), line, (linelen + 1));
  72                 line[0] = '.';
  73         }
  74 }
  75
  76 /*
  77  * Add a virtual user entry to the list of virtual users
  78  */
  79 static void
  80 add_virtuser(char *login, char *address)
  81 {
  82         struct virtuser *v;
  83
  84         v = malloc(sizeof(struct virtuser));
  85         v->login = strdup(login);
  86         v->address = strdup(address);
  87         SLIST_INSERT_HEAD(&virtusers, v, next);
  88 }
  89
  90 /*
  91  * Read the virtual user table
  92  */
  93 int
  94 parse_virtuser(const char *path)
  95 {
  96         FILE *v;
  97         char *word;
  98         char *data;
  99         char line[2048];
 100
 101         v = fopen(path, "r");
 102         if (v == NULL)
 103                 return (-1);
 104
 105         while (!feof(v)) {
 106                 if (fgets(line, sizeof(line), v) == NULL)
 107                         break;
 108                 /* We hit a comment */
 109                 if (strchr(line, '#'))
 110                         *strchr(line, '#') = 0;
 111                 if ((word = strtok(line, DP)) != NULL) {
 112                         data = strtok(NULL, DP);
 113                         if (data != NULL) {
 114                                 add_virtuser(word, data);
 115                         }
 116                 }
 117         }
 118
 119         fclose(v);
 120         return (0);
 121 }
 122
 123 /*
 124  * Add entry to the SMTP auth user list
 125  */
 126 static int
 127 add_smtp_auth_user(char *userstring, char *password)
 128 {
 129         struct authuser *a;
 130         char *temp;
 131
 132         a = malloc(sizeof(struct virtuser));
 133         a->password= strdup(password);
 134
 135         temp = strrchr(userstring, '|');
 136         if (temp == NULL)
 137                 return (-1);
 138
 139         a->host = strdup(temp+1);
 140         a->login = strdup(strtok(userstring, "|"));
 141         if (a->login == NULL)
 142                 return (-1);
 143
 144         SLIST_INSERT_HEAD(&authusers, a, next);
 145
 146         return (0);
 147 }
 148
 149 /*
 150  * Read the SMTP authentication config file
 151  */
 152 int
 153 parse_authfile(const char *path)
 154 {
 155         FILE *a;
 156         char *word;
 157         char *data;
 158         char line[2048];
 159
 160         a = fopen(path, "r");
 161         if (a == NULL)
 162                 return (-1);
 163
 164         while (!feof(a)) {
 165                 if (fgets(line, sizeof(line), a) == NULL)
 166                         break;
 167                 /* We hit a comment */
 168                 if (strchr(line, '#'))
 169                         *strchr(line, '#') = 0;
 170                 if ((word = strtok(line, DP)) != NULL) {
 171                         data = strtok(NULL, DP);
 172                         if (data != NULL) {
 173                                 if (add_smtp_auth_user(word, data) < 0)
 174                                         return (-1);
 175                         }
 176                 }
 177         }
 178
 179         fclose(a);
 180         return (0);
 181 }
 182
 183 /*
 184  * XXX TODO
 185  * Check if the user supplied a value.  If not, fill in default
 186  * Check for bad things[TM]
 187  */
 188 int
 189 parse_conf(const char *config_path)
 190 {
 191         char *word;
 192         char *data;
 193         FILE *conf;
 194         char line[2048];
 195
 196         conf = fopen(config_path, "r");
 197         if (conf == NULL)
 198                 return (-1);
 199
 200         /* Reset features */
 201         config->features = 0;
 202
 203         while (!feof(conf)) {
 204                 if (fgets(line, sizeof(line), conf) == NULL)
 205                         break;
 206                 /* We hit a comment */
 207                 if (strchr(line, '#'))
 208                         *strchr(line, '#') = 0;
 209                 if ((word = strtok(line, EQS)) != NULL) {
 210                         data = strtok(NULL, EQS);
 211                         if (strcmp(word, "SMARTHOST") == 0) {
 212                                 if (data != NULL)
 213                                         config->smarthost = strdup(data);
 214                         }
 215                         else if (strcmp(word, "PORT") == 0) {
 216                                 if (data != NULL)
 217                                         config->port = atoi(strdup(data));
 218                         }
 219                         else if (strcmp(word, "ALIASES") == 0) {
 220                                 if (data != NULL)
 221                                         config->aliases = strdup(data);
 222                         }
 223                         else if (strcmp(word, "SPOOLDIR") == 0) {
 224                                 if (data != NULL)
 225                                         config->spooldir = strdup(data);
 226                         }
 227                         else if (strcmp(word, "VIRTPATH") == 0) {
 228                                 if (data != NULL)
 229                                         config->virtualpath = strdup(data);
 230                         }
 231                         else if (strcmp(word, "AUTHPATH") == 0) {
 232                                 if (data != NULL)
 233                                         config->authpath= strdup(data);
 234                         }
 235                         else if (strcmp(word, "CERTFILE") == 0) {
 236                                 if (data != NULL)
 237                                         config->certfile = strdup(data);
 238                         }
 239                         else if (strcmp(word, "MAILNAME") == 0) {
 240                                 if (data != NULL)
 241                                         config->mailname = strdup(data);
 242                         }
 243                         else if (strcmp(word, "MAILNAMEFILE") == 0) {
 244                                 if (data != NULL)
 245                                         config->mailnamefile = strdup(data);
 246                         }
 247                         else if (strcmp(word, "VIRTUAL") == 0)
 248                                 config->features |= VIRTUAL;
 249                         else if (strcmp(word, "STARTTLS") == 0)
 250                                 config->features |= STARTTLS;
 251                         else if (strcmp(word, "SECURETRANSFER") == 0)
 252                                 config->features |= SECURETRANS;
 253                         else if (strcmp(word, "DEFER") == 0)
 254                                 config->features |= DEFER;
 255                         else if (strcmp(word, "INSECURE") == 0)
 256                                 config->features |= INSECURE;
 257                         else if (strcmp(word, "FULLBOUNCE") == 0)
 258                                 config->features |= FULLBOUNCE;
 259                         else {
 260                                 errno = EINVAL;
 261                                 return (-1);
 262                         }
 263                 }
 264         }
 265
 266         fclose(conf);
 267         return (0);
 268 }
 269