masqmail: e507c854a63e src/masqmail.h

masqmail

view src/masqmail.h @ 331:e507c854a63e

Security fix! Correct handling of seteuid() return value See Debian bug #638002, reported by John Lightsey. When possible the (already available) set_euidgid() function is used. Additionally, it is unnecessary to change the identity when writing into an already open file descriptor. This should fix the problem.

author	markus schnalke <meillo@marmaro.de>
date	Sat, 27 Aug 2011 16:19:07 +0200
parents	55b7bde95d37
children	9149d893eb52

line source

1 /* MasqMail

5 This program is free software; you can redistribute it and/or modify

6 it under the terms of the GNU General Public License as published by

7 the Free Software Foundation; either version 2 of the License, or

8 (at your option) any later version.

10 This program is distributed in the hope that it will be useful,

11 but WITHOUT ANY WARRANTY; without even the implied warranty of

12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 GNU General Public License for more details.

15 You should have received a copy of the GNU General Public License

16 along with this program; if not, write to the Free Software

17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

18 */

19 #include <config.h>

21 #include <stdio.h>

22 #include <stdarg.h>

23 #include <errno.h>

24 #include <stdlib.h>

25 #include <string.h>

26 #include <ctype.h>

27 #include <unistd.h>

28 #include <pwd.h>

29 #include <sys/types.h>

30 #include <sys/socket.h>

31 #include <netinet/in.h>

32 #include <time.h>

33 #include <sys/time.h>

34 #include <netinet/in.h>

35 #include <arpa/inet.h>

36 #include <netdb.h>

37 #include <syslog.h>

38 #include <signal.h>

39 #include <fcntl.h>

41 #include <glib.h>

43 #ifdef ENABLE_IDENT

44 #include "libident/ident.h"

45 #endif

47 #include "lookup.h"

49 typedef struct _interface {

50 gchar *address;

51 gint port;

52 } interface;

54 #define ADDR_FLAG_DELIVERED 0x01

55 #define ADDR_FLAG_DEFERED 0x02

56 #define ADDR_FLAG_FAILED 0x04

57 #define ADDR_FLAG_LAST_ROUTE 0x40

59 typedef struct _address {

60 gchar *address;

61 gchar *local_part;

62 gchar *domain;

63 gint flags;

64 GList *children;

65 struct _address *parent;

66 } address;

68 #define addr_mark_delivered(addr) { addr->flags |= ADDR_FLAG_DELIVERED; }

69 #define addr_unmark_delivered(addr) { addr->flags &= ~ADDR_FLAG_DELIVERED; }

70 #define addr_is_delivered(addr) ((addr->flags & ADDR_FLAG_DELIVERED) != 0 )

72 #define addr_mark_defered(addr) { addr->flags |= ADDR_FLAG_DEFERED; }

73 #define addr_unmark_defered(addr) { addr->flags &= ~ADDR_FLAG_DEFERED; }

74 #define addr_is_defered(addr) ((addr->flags & ADDR_FLAG_DEFERED) != 0 )

76 #define addr_mark_failed(addr) { addr->flags |= ADDR_FLAG_FAILED; }

77 #define addr_unmark_failed(addr) { addr->flags &= ~ADDR_FLAG_FAILED; }

78 #define addr_is_failed(addr) ((addr->flags & ADDR_FLAG_FAILED) != 0 )

80 typedef struct _connect_route {

81 gchar *name;

82 gchar *filename;

84 gboolean is_local_net;

85 gboolean last_route;

87 GList *allowed_senders;

88 GList *denied_senders;

89 GList *allowed_recipients;

90 GList *denied_recipients;

92 interface *mail_host;

93 gboolean connect_error_fail;

94 GList *resolve_list;

95 gchar *helo_name;

96 gboolean do_correct_helo;

97 gboolean instant_helo;

98 gboolean do_pipelining;

99 gchar *auth_name;

100 gchar *auth_login;

101 gchar *auth_secret;

102 gchar *wrapper;

103

104 gchar *set_h_from_domain;

105 gchar *set_h_reply_to_domain;

106 gchar *set_return_path_domain;

107 GList *map_h_from_addresses;

108 GList *map_h_reply_to_addresses;

109 GList *map_h_mail_followup_to_addresses;

110 GList *map_return_path_addresses;

111 gboolean expand_h_sender_domain;

112 gboolean expand_h_sender_address;

113

114 gchar *pipe;

115 gboolean pipe_fromline;

116 gboolean pipe_fromhack;

117 } connect_route;

118

119 typedef struct _masqmail_conf {

120 gint mail_uid;

121 gint mail_gid;

122

123 gint orig_uid;

124 gint orig_gid;

125

126 gboolean run_as_user;

127

128 gchar *mail_dir;

129 gchar *lock_dir;

130 gchar *spool_dir;

131 gchar *log_dir;

132

133 gint debug_level;

134 gboolean use_syslog;

135 guint log_max_pri;

136

137 gchar *host_name;

138 GList *local_hosts;

139 GList *local_addresses;

140 GList *not_local_addresses;

141 GList *local_nets;

142 GList *listen_addresses;

143

144 /* ANSI C defines unsigned long to be at least 32bit

145 i.e. ca. 4GB max; that should be enough. */

146 gulong max_msg_size;

147

148 gboolean do_save_envelope_to;

149

150 gboolean defer_all;

151 gboolean do_relay;

152

153 GList *ident_trusted_nets;

154

155 gboolean do_queue;

156

157 gboolean do_verbose;

158

159 gchar *mbox_default;

160 GList *mbox_users;

161 GList *mda_users;

162

163 gchar *mda;

164 gboolean mda_fromline;

165 gboolean mda_fromhack;

166

167 gboolean pipe_fromline;

168 gboolean pipe_fromhack;

169

170 gchar *alias_file;

171 int (*localpartcmp) (const char *, const char *);

172

173 GList *local_net_routes;

174 GList *connect_routes; /* list of pairs which point to lists */

175

176 gchar *online_query;

177

178 gchar *errmsg_file;

179 gchar *warnmsg_file;

180 GList *warn_intervals;

181 gint max_defer_time;

182

183 gchar *log_user;

184 } masqmail_conf;

185

186 extern masqmail_conf conf;

187

188 typedef struct _table_pair {

189 gchar *key;

190 gpointer *value;

191 } table_pair;

192

193

194 /* must match the contents of prot_names[] in accept.c */

195 typedef enum _prot_id {

196 PROT_LOCAL = 0,

197 PROT_SMTP,

198 PROT_ESMTP,

199 PROT_NUM

200 } prot_id;

201

202 extern gchar *prot_names[];

203

204 typedef enum _header_id {

205 HEAD_FROM = 0,

206 HEAD_SENDER,

207 HEAD_TO,

208 HEAD_CC,

209 HEAD_BCC,

210 HEAD_DATE,

211 HEAD_MESSAGE_ID,

212 HEAD_REPLY_TO,

213 HEAD_SUBJECT,

214 HEAD_RETURN_PATH,

215 HEAD_ENVELOPE_TO,

216 HEAD_RECEIVED,

217 HEAD_NUM_IDS,

218 HEAD_STATUS,

219 HEAD_UNKNOWN = HEAD_NUM_IDS,

220 HEAD_NONE = -1,

221 } header_id;

222

223 typedef struct _header_name {

224 gchar *header;

225 header_id id;

226 } header_name;

227

228 typedef struct _header {

229 header_id id;

230 gchar *header;

231 gchar *value;

232 } header;

233

234

235 typedef struct _message {

236 gchar *uid;

237

238 gchar *received_host;

239 prot_id received_prot;

240 gchar *ident;

241 gint transfer_id; /* for multiple messages per transfer */

242

243 address *return_path;

244 GList *rcpt_list;

245 GList *non_rcpt_list;

246

247 GList *hdr_list;

248 GList *data_list;

249

250 gint data_size;

251 time_t received_time;

252 time_t warned_time;

253

254 gchar *full_sender_name;

255 } message;

256

257 typedef struct _msg_out {

258 message *msg;

259

260 address *return_path;

261 GList *rcpt_list;

262

263 GList *hdr_list;

264 GList *xtra_hdr_list;

265 } msg_out;

266

267 typedef struct _msgout_perhost {

268 gchar *host;

269 GList *msgout_list;

270 } msgout_perhost;

271

272 /* flags for accept() */

273 #define ACC_RCPT_FROM_HEAD 0x08 /* -t option, get rcpts from headers */

274 #define ACC_DOT_IGNORE 0x10 /* a dot on a line itself does not end the message (-oi option) */

275 #define ACC_MAIL_FROM_HEAD 0x40 /* get return path from header */

276 #define ACC_NODOT_RELAX 0x80 /* do not be picky if message ist not terminated by a dot on a line */

277 #define ACC_SAVE_ENVELOPE_TO 0x0100 /* save an existent Envelope-to header as X-Orig-Envelope-to */

278

279 #define DLVR_LOCAL 0x01

280 #define DLVR_LAN 0x02

281 #define DLVR_ONLINE 0x04

282 #define DLVR_ALL (DLVR_LOCAL|DLVR_LAN|DLVR_ONLINE)

283

284 /* transport flags */

285 #define MSGSTR_FROMLINE 0x01

286 #define MSGSTR_FROMHACK 0x02

287

288 typedef enum _accept_error {

289 AERR_OK = 0,

290 AERR_TIMEOUT,

291 AERR_EOF,

292 AERR_OVERFLOW,

293 AERR_SYNTAX,

294 AERR_NOSPOOL,

295 AERR_NORCPT,

296 AERR_SIZE, /* max msg size exeeded (SMTP SIZE) */

297 AERR_UNKNOWN

298 } accept_error;

299

300 #define BUF_LEN 1024

301 #define MAX_ADDRESS 256

302 #define MAX_DATALINE 4096

303

304 typedef enum _smtp_cmd_id {

305 SMTP_HELO = 0,

306 SMTP_EHLO,

307 SMTP_MAIL_FROM,

308 SMTP_RCPT_TO,

309 SMTP_DATA,

310 SMTP_QUIT,

311 SMTP_RSET,

312 SMTP_NOOP,

313 SMTP_HELP,

314 SMTP_NUM_IDS,

315 SMTP_EOF = -1,

316 SMTP_ERROR = -2,

317 } smtp_cmd_id;

318

319 typedef struct _smtp_cmd {

320 smtp_cmd_id id;

321 gchar *cmd;

322 } smtp_cmd;

323

324 typedef struct _smtp_connection {

325 gchar *remote_host;

326

327 prot_id prot;

328 gint next_id;

329

330 gboolean helo_seen;

331 gboolean from_seen;

332 gboolean rcpt_seen;

333

334 message *msg;

335 } smtp_connection;

336

337 /* alias.c*/

338 gboolean addr_is_local(address * addr);

339 GList *alias_expand(GList * alias_table, GList * rcpt_list, GList * non_rcpt_list);

340

341 /* child.c */

342 int child(const char *command);

343

344 /* conf.c */

345 void init_conf();

346 gboolean read_conf(gchar * filename);

347 connect_route *read_route(gchar * filename, gboolean is_local_net);

348 GList *read_route_list(GList * rf_list, gboolean is_local_net);

349 void destroy_route(connect_route * r);

350 void destroy_route_list(GList * list);

351 connect_route *create_local_route();

352

353 /* expand.c */

354 GList *var_table_rcpt(GList * var_table, address * rcpt);

355 GList *var_table_msg(GList * var_table, message * msg);

356 GList *var_table_conf(GList * var_table);

357 gint expand(GList * var_list, gchar * format, gchar * result, gint result_len);

358

359 /* message.c */

360 message *create_message(void);

361 void destroy_message(message * msg);

362 void destroy_msg_list(GList * msg_list);

363 void msg_free_data(message * msg);

364 gint msg_calc_size(message * msg, gboolean is_smtp);

365

366 msg_out *create_msg_out(message * msg);

367 msg_out *clone_msg_out(msg_out * msgout_orig);

368 GList *create_msg_out_list(GList * msg_list);

369 void destroy_msg_out(msg_out * msgout);

370 void destroy_msg_out_list(GList * msgout_list);

371

372 /* address.c */

373 address *create_address(gchar * path, gboolean is_rfc821);

374 address *create_address_qualified(gchar * path, gboolean is_rfc821, gchar * domain);

375 address *create_address_pipe(gchar * path);

376 void destroy_address(address * addr);

377 address *copy_modify_address(const address * orig, gchar * l_part, gchar * dom);

378 #define copy_address(addr) copy_modify_address(addr, NULL, NULL)

379 gboolean addr_isequal(address * addr1, address * addr2, int (*cmpfunc) (const char*, const char*));

380 gboolean addr_isequal_parent(address * addr1, address * addr2, int (*cmpfunc) (const char*, const char*));

381 address *addr_find_ancestor(address * addr);

382 gboolean addr_is_delivered_children(address * addr);

383 gboolean addr_is_finished_children(address * addr);

384 gchar *addr_string(address * addr);

385

386 /* accept.c */

387 accept_error accept_message(FILE * in, message * msg, guint flags);

388 accept_error accept_message_prepare(message * msg, guint flags);

389

390 /* header.c */

391 gchar *rec_timestamp();

392 GList *find_header(GList * hdr_list, header_id id, gchar * hdr_str);

393 void header_unfold(header * hdr);

394 void header_fold(header * hdr, unsigned int maxlen);

395 header *create_header(header_id id, gchar * fmt, ...);

396 void destroy_header(header * hdr);

397 header *copy_header(header * hdr);

398 header *get_header(gchar * line);

399

400 /* smtp_in.c */

401 void smtp_in(FILE * in, FILE * out, gchar * remote_host, gchar * ident);

402

403 /* listen.c */

404 void listen_port(GList * addr_list, gint qival, char *argv[]);

405

406 /* parse.c */

407 gboolean split_address(const gchar * path, gchar ** local_part, gchar ** domain, gboolean is_rfc821);

408 gboolean parse_address_rfc822(gchar * string, gchar ** local_begin, gchar ** local_end, gchar ** domain_begin, gchar ** domain_end, gchar ** address_end);

409 gboolean parse_address_rfc821(gchar * string, gchar ** local_begin, gchar ** local_end, gchar ** domain_begin, gchar ** domain_end, gchar ** address_end);

410 address *_create_address(gchar * string, gchar ** end, gboolean is_rfc821);

411 address *create_address_rfc821(gchar * string, gchar ** end);

412 address *create_address_rfc822(gchar * string, gchar ** end);

413 GList *addr_list_append_rfc822(GList * addr_list, gchar * string, gchar * domain);

414

415 /* connect.c */

416 mxip_addr *connect_hostlist(int *psockfd, gchar * host, guint port, GList * addr_list);

417 mxip_addr *connect_resolvelist(int *psockfd, gchar * host, guint port, GList * res_funcs);

418

419 /* deliver.c */

420 void msg_rcptlist_local(GList * rcpt_list, GList **, GList **);

421 gboolean deliver_local(msg_out * msgout);