masqmail: 0f36c0a46f82 src/spool.c

masqmail

view src/spool.c @ 211:0f36c0a46f82

replaced hmac_md5.c with an own implementation of RFC 2104 Until now the sample code of the RFC itself was used, but it lacked a license or copyright notice. See the comment in hmac_md5.c for details.

author	meillo@marmaro.de
date	Sun, 18 Jul 2010 22:20:36 +0200
parents	a80ebfa16cd5
children	92063f90f9be

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 */

20 #include <sys/stat.h>

22 #include "masqmail.h"

23 #include "dotlock.h"

25 static gint

26 read_line(FILE * in, gchar * buf, gint buf_len)

27 {

28 gint p = 0;

29 gint c;

31 while ((c = getc(in)) != '\n' && (c != EOF)) {

32 if (p >= buf_len - 1) {

33 buf[buf_len-1] = '\0';

34 ungetc(c, in);

35 return buf_len;

36 }

37 buf[p++] = c;

38 }

40 if (c == EOF) {

41 return -1;

42 }

43 if ((p > 0) && (buf[p - 1] == '\r'))

44 p--;

45 buf[p++] = '\n';

46 buf[p] = '\0';

48 return p;

49 }

51 static void

52 spool_write_rcpt(FILE * out, address * rcpt)

53 {

54 gchar dlvrd_char = addr_is_delivered(rcpt) ? 'X' : (addr_is_failed(rcpt) ? 'F' : ' ');

56 if (rcpt->local_part[0] != '|') {

57 /* this is a paranoid check, in case it slipped through: */

58 /* if this happens, it is a bug */

59 if (rcpt->domain == NULL) {

60 logwrite(LOG_WARNING, "BUG: null domain for address %s, setting to %s\n", rcpt->local_part, conf.host_name);

61 logwrite(LOG_WARNING, "please report this bug.\n");

62 rcpt->domain = g_strdup(conf.host_name);

63 }

64 fprintf(out, "RT:%c%s\n", dlvrd_char, addr_string(rcpt));

65 } else {

66 fprintf(out, "RT:%c%s\n", dlvrd_char, rcpt->local_part);

67 }

68 }

70 static address*

71 spool_scan_rcpt(gchar * line)

72 {

73 address *rcpt = NULL;

75 if (line[3] != '\0') {

76 if (line[4] != '|') {

77 rcpt = create_address(&(line[4]), TRUE);

78 } else {

79 rcpt = create_address_pipe(&(line[4]));

80 }

81 if (line[3] == 'X') {

82 addr_mark_delivered(rcpt);

83 } else if (line[3] == 'F') {

84 addr_mark_failed(rcpt);

85 }

86 }

87 return rcpt;

88 }

90 gboolean

91 spool_read_data(message * msg)

92 {

93 FILE *in;

94 gchar *spool_file;

96 DEBUG(5) debugf("spool_read_data entered\n");

97 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);

98 DEBUG(5) debugf("reading data spool file '%s'\n", spool_file);

99 in = fopen(spool_file, "r");

100 if (!in) {

101 logwrite(LOG_ALERT, "could not open spool data file %s: %s\n", spool_file, strerror(errno));

102 return FALSE;

103 }

104

105 char buf[MAX_DATALINE];

106 int len;

107

108 /* msg uid */

109 read_line(in, buf, MAX_DATALINE);

110

111 /* data */

112 msg->data_list = NULL;

113 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {

114 msg->data_list = g_list_prepend(msg->data_list, g_strdup(buf));

115 }

116 msg->data_list = g_list_reverse(msg->data_list);

117 fclose(in);

118 return TRUE;

119 }

120

121 gboolean

122 spool_read_header(message * msg)

123 {

124 FILE *in;

125 gchar *spool_file;

126

127 /* header spool: */

128 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);

129 in = fopen(spool_file, "r");

130 if (!in) {

131 logwrite(LOG_ALERT, "could not open spool header file %s: %s\n",

132 spool_file, strerror(errno));

133 return FALSE;

134 }

135

136 header *hdr = NULL;

137 char buf[MAX_DATALINE];

138 int len;

139

140 /* msg uid */

141 read_line(in, buf, MAX_DATALINE);

142

143 /* envelope header */

144 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {

145 if (buf[0] == '\n') {

146 break;

147 } else if (strncasecmp(buf, "MF:", 3) == 0) {

148 msg->return_path = create_address(&(buf[3]), TRUE);

149 DEBUG(3) debugf("spool_read: MAIL FROM: %s\n", msg->return_path->address);

150 } else if (strncasecmp(buf, "RT:", 3) == 0) {

151 address *addr;

152 addr = spool_scan_rcpt(buf);

153 if (addr_is_delivered(addr) || addr_is_failed(addr)) {

154 msg->non_rcpt_list = g_list_append(msg->non_rcpt_list, addr);

155 } else {

156 msg->rcpt_list = g_list_append(msg->rcpt_list, addr);

157 }

158 } else if (strncasecmp(buf, "PR:", 3) == 0) {

159 prot_id i;

160 for (i = 0; i < PROT_NUM; i++) {

161 if (strncasecmp(prot_names[i], &(buf[3]), strlen(prot_names[i])) == 0) {

162 break;

163 }

164 }

165 msg->received_prot = i;

166 } else if (strncasecmp(buf, "RH:", 3) == 0) {

167 g_strchomp(buf);

168 msg->received_host = g_strdup(&(buf[3]));

169 } else if (strncasecmp(buf, "ID:", 3) == 0) {

170 g_strchomp(buf);

171 msg->ident = g_strdup(&(buf[3]));

172 } else if (strncasecmp(buf, "DS:", 3) == 0) {

173 msg->data_size = atoi(&(buf[3]));

174 } else if (strncasecmp(buf, "TR:", 3) == 0) {

175 msg->received_time = (time_t) (atoi(&(buf[3])));

176 } else if (strncasecmp(buf, "TW:", 3) == 0) {

177 msg->warned_time = (time_t) (atoi(&(buf[3])));

178 }

179 /* so far ignore other tags */

180 }

181

182 /* mail headers */

183 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {

184 if (strncasecmp(buf, "HD:", 3) == 0) {

185 hdr = get_header(&(buf[3]));

186 msg->hdr_list = g_list_append(msg->hdr_list, hdr);

187 } else if ((buf[0] == ' ' || buf[0] == '\t') && hdr) {

188 char *tmp = hdr->header;

189 /* header continuation */

190 hdr->header = g_strconcat(hdr->header, buf, NULL);

191 hdr->value = hdr->header + (hdr->value - tmp);

192 } else {

193 break;

194 }

195 }

196 fclose(in);

197 return TRUE;

198 }

199

200 message*

201 msg_spool_read(gchar * uid, gboolean do_readdata)

202 {

203 message *msg;

204 gboolean ok = FALSE;

205

206 msg = create_message();

207 msg->uid = g_strdup(uid);

208

209 DEBUG(4) debugf("msg_spool_read():\n");

210 /* header spool: */

211 ok = spool_read_header(msg);

212 DEBUG(4) debugf(" spool_read_header()=%d, do_readdata=%d\n", ok, do_readdata);

213 if (ok && do_readdata) {

214 /* data spool: */

215 ok = spool_read_data(msg);

216 DEBUG(4) debugf(" spool_read_data()=%d\n", ok);

217 }

218 return msg;

219 }

220

221 /* write header. uid and gid should already be set to the

222 mail ids. Better call spool_write(msg, FALSE).

223 */

224 static gboolean

225 spool_write_header(message * msg)

226 {

227 GList *node;

228 gchar *spool_file, *tmp_file;

229 FILE *out;

230 gboolean ok = TRUE;

231

232 /* header spool: */

233 tmp_file = g_strdup_printf("%s/input/%d-H.tmp", conf.spool_dir, getpid());

234 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);

235

236 if ((out = fopen(tmp_file, "w"))) {

237 DEBUG(6) debugf("opened tmp_file %s\n", tmp_file);

238

239 fprintf(out, "%s\n", msg->uid);

240 fprintf(out, "MF:%s\n", addr_string(msg->return_path));

241

242 DEBUG(6) debugf("after MF\n");

243 foreach(msg->rcpt_list, node) {

244 address *rcpt = (address *) (node->data);

245 spool_write_rcpt(out, rcpt);

246 }

247 foreach(msg->non_rcpt_list, node) {

248 address *rcpt = (address *) (node->data);

249 spool_write_rcpt(out, rcpt);

250 }

251 DEBUG(6) debugf("after RT\n");

252 fprintf(out, "PR:%s\n", prot_names[msg->received_prot]);

253 if (msg->received_host != NULL)

254 fprintf(out, "RH:%s\n", msg->received_host);

255

256 if (msg->ident != NULL)

257 fprintf(out, "ID:%s\n", msg->ident);

258

259 if (msg->data_size >= 0)

260 fprintf(out, "DS: %d\n", msg->data_size);

261

262 if (msg->received_time > 0)

263 fprintf(out, "TR: %u\n", (int) (msg->received_time));

264

265 if (msg->warned_time > 0)

266 fprintf(out, "TW: %u\n", (int) (msg->warned_time));

267

268 DEBUG(6) debugf("after RH\n");

269 fprintf(out, "\n");

270

271 foreach(msg->hdr_list, node) {

272 header *hdr = (header *) (node->data);

273 fprintf(out, "HD:%s", hdr->header);

274 }

275 if (fflush(out) == EOF)

276 ok = FALSE;

277 else if (fdatasync(fileno(out)) != 0) {

278 if (errno != EINVAL) /* some fs do not support this.. I hope this also means that it is not necessary */

279 ok = FALSE;

280 }

281 fclose(out);

282 if (ok) {

283 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);

284 DEBUG(4) debugf("spool_file = %s\n", spool_file);

285 ok = (rename(tmp_file, spool_file) != -1);

286 g_free(spool_file);

287 }

288 } else {

289 logwrite(LOG_ALERT, "could not open temporary header spool file '%s': %s\n", tmp_file, strerror(errno));

290 DEBUG(1) debugf("euid = %d, egid = %d\n", geteuid(), getegid());

291 ok = FALSE;

292 }

293

294 g_free(tmp_file);

295

296 return ok;

297 }

298

299 gboolean

300 spool_write(message * msg, gboolean do_write_data)

301 {

302 GList *list;

303 gchar *spool_file, *tmp_file;

304 FILE *out;

305 gboolean ok = TRUE;

306 uid_t saved_uid, saved_gid;

307 /* user can read/write, group can read, others cannot do anything: */

308 mode_t saved_mode = saved_mode = umask(026);

309

310 /* set uid and gid to the mail ids */

311 if (!conf.run_as_user) {

312 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

313 }

314

315 /* header spool: */

316 ok = spool_write_header(msg);

317

318 if (ok && do_write_data) {

319 /* data spool: */

320 tmp_file = g_strdup_printf("%s/input/%d-D.tmp", conf.spool_dir, getpid());

321 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);

322

323 if ((out = fopen(tmp_file, "w"))) {

324 fprintf(out, "%s\n", msg->uid);

325 for (list = g_list_first(msg->data_list); list != NULL; list = g_list_next(list)) {

326 fprintf(out, "%s", (gchar *) (list->data));

327 }

328

329 /* possibly paranoid ;-) */

330 if (fflush(out) == EOF) {

331 ok = FALSE;

332 } else if (fdatasync(fileno(out)) != 0) {

333 if (errno != EINVAL) { /* some fs do not support this.. I hope this also means that it is not necessary */

334 ok = FALSE;

335 }

336 }

337 fclose(out);

338 if (ok) {

339 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);

340 DEBUG(4) debugf("spool_file = %s\n", spool_file);

341 ok = (rename(tmp_file, spool_file) != -1);

342 g_free(spool_file);

343 }

344 } else {

345 logwrite(LOG_ALERT, "could not open temporary data spool file: %s\n",

346 strerror(errno));

347 ok = FALSE;

348 }

349 g_free(tmp_file);

350 }

351

352 /* set uid and gid back */

353 if (!conf.run_as_user) {

354 set_euidgid(saved_uid, saved_gid, NULL, NULL);

355 }

356

357 umask(saved_mode);

358

359 return ok;

360 }

361

362 #define MAX_LOCKAGE 300

363

364 gboolean

365 spool_lock(gchar * uid)

366 {

367 uid_t saved_uid, saved_gid;

368 gchar *hitch_name;

369 gchar *lock_name;

370 gboolean ok = FALSE;

371

372 hitch_name = g_strdup_printf("%s/%s-%d.lock", conf.lock_dir, uid, getpid());

373 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);

374

375 /* set uid and gid to the mail ids */

376 if (!conf.run_as_user) {

377 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

378 }

379

380 ok = dot_lock(lock_name, hitch_name);

381 if (!ok)

382 logwrite(LOG_WARNING, "spool file %s is locked\n", uid);

383

384 /* set uid and gid back */

385 if (!conf.run_as_user) {

386 set_euidgid(saved_uid, saved_gid, NULL, NULL);

387 }

388

389 g_free(lock_name);

390 g_free(hitch_name);

391

392 return ok;

393 }

394

395 gboolean

396 spool_unlock(gchar * uid)

397 {

398 uid_t saved_uid, saved_gid;

399 gchar *lock_name;

400

401 /* set uid and gid to the mail ids */

402 if (!conf.run_as_user) {

403 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

404 }

405

406 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);

407 dot_unlock(lock_name);

408 g_free(lock_name);

409

410 /* set uid and gid back */

411 if (!conf.run_as_user) {

412 set_euidgid(saved_uid, saved_gid, NULL, NULL);

413 }

414 return TRUE;

415 }

416

417 gboolean

418 spool_delete_all(message * msg)

419 {

420 uid_t saved_uid, saved_gid;

421 gchar *spool_file;

422

423 /* set uid and gid to the mail ids */

424 if (!conf.run_as_user) {

425 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

426 }

427

428 /* header spool: */

429 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);

430 if (unlink(spool_file) != 0) {

431 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));

432 }

433 g_free(spool_file);

434

435 /* data spool: */

436 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);

437 if (unlink(spool_file) != 0) {

438 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));

439 }

440 g_free(spool_file);

441

442 /* set uid and gid back */

443 if (!conf.run_as_user) {

444 set_euidgid(saved_uid, saved_gid, NULL, NULL);

445 }

446 return TRUE;

447 }