masqmail: 6c59dedd06be src/accept.c

masqmail

view src/accept.c @ 17:6c59dedd06be

fixed delivery with empty or non-existent alias file Thanks to Marcos Dione for the hint where to look. (Closes Debian bug #417842)

author	meillo@marmaro.de
date	Thu, 06 Nov 2008 09:41:35 +0100
parents	49dab67fe461
children	7c1635972aa7

line source

1 /* MasqMail

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

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

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

7 (at your option) any later version.

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

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

11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

12 GNU General Public License for more details.

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

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

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

17 */

19 #include "masqmail.h"

20 #include "readsock.h"

22 gchar *prot_names[] = {

23 "local",

24 "bsmtp",

25 "smtp",

26 "esmtp",

27 "pop3",

28 "apop",

29 "(unknown)" /* should not happen, but better than crashing. */

30 };

32 static gchar*

33 string_base62(gchar * res, guint value, gchar len)

34 {

35 static gchar base62_chars[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

36 gchar *p = res + len;

37 *p = '\0';

38 while (p > res) {

39 *(--p) = base62_chars[value % 62];

40 value /= 62;

41 }

42 return res;

43 }

45 static gint

46 _g_list_addr_isequal(gconstpointer a, gconstpointer b)

47 {

48 address *addr1 = (address *) a;

49 address *addr2 = (address *) b;

50 int ret;

52 if ((ret = strcasecmp(addr1->domain, addr2->domain)) == 0)

53 return strcmp(addr1->local_part, addr2->local_part);

54 else

55 return ret;

56 }

58 /* accept message from anywhere.

59 A locally originating message is indicated by msg->recieved_host == NULL

61 If the flags ACC_DEL_RCPTS is set, recipients in the msg->rcpt_list is

62 copied and items occuring in it will be removed from the newly constructed

63 (from To/Cc/Bcc headers if ACC_RCPT_TO is set) rcpt_list.

64 */

66 accept_error

67 accept_message_stream(FILE * in, message * msg, guint flags)

68 {

69 gchar *line, *line1;

70 int line_size = MAX_DATALINE;

71 gboolean in_headers = TRUE;

72 header *hdr = NULL;

73 gint line_cnt = 0, data_size = 0;

75 line = g_malloc(line_size);

76 line[0] = '\0';

78 while (TRUE) {

79 int len = read_sockline1(in, &line, &line_size, 5 * 60, READSOCKL_CVT_CRLF);

81 line1 = line;

83 if ((line[0] == '.') && (!(flags & ACC_NODOT_TERM))) {

84 if (line[1] == '\n') {

85 g_free(line);

86 break;

87 }

88 line1++;

89 }

91 if (len <= 0) {

92 if ((len == -1) && ((flags & ACC_NODOT_TERM) || (flags & ACC_NODOT_RELAX))) {

93 /* we got an EOF, and the last line was not terminated by a CR */

94 gint len1 = strlen(line1);

95 if (len1 > 0) { /* == 0 is 'normal' (EOF after a CR) */

96 if (line1[len1 - 1] != '\n') { /* some mail clients allow unterminated lines */

97 line1[len1] = '\n';

98 line1[len1 + 1] = '\0';

99 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));

100 data_size += strlen(line1);

101 line_cnt++;

102 }

103 }

104 break;

105 } else {

106 g_free(line);

107 if (len == -1) {

108 return AERR_EOF;

109 } else if (len == -2) {

110 /* should not happen any more */

111 return AERR_OVERFLOW;

112 } else if (len == -3) {

113 return AERR_TIMEOUT;

114 } else {

115 /* does not happen */

116 DEBUG(5) debugf("read_sockline returned %d\n", len);

117 return AERR_UNKNOWN;

118 }

119 }

120 } else {

121 if (in_headers) {

122

123 /* some pop servers send the 'From ' line, skip it: */

124 if (msg->hdr_list == NULL)

125 if (strncmp(line1, "From ", 5) == 0)

126 continue;

127

128 if (line1[0] == ' ' || line1[0] == '\t') {

129 /* continuation of 'folded' header: */

130 if (hdr) {

131 hdr->header =

132 g_strconcat(hdr->header, line1, NULL);

133 }

134

135 } else if (line1[0] == '\n') {

136 /* an empty line marks end of headers */

137 in_headers = FALSE;

138 } else {

139 /* in all other cases we expect another header */

140 if ((hdr = get_header(line1)))

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

142 else {

143 /* if get_header() returns NULL, no header was recognized,

144 so this seems to be the first data line of a broken mailer

145 which does not send an empty line after the headers */

146 in_headers = FALSE;

147 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));

148 }

149 }

150 } else {

151 msg->data_list = g_list_prepend(msg->data_list, g_strdup(line1));

152 data_size += strlen(line1);

153 line_cnt++;

154 }

155 }

156 }

157

158 if (msg->data_list != NULL)

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

160 else

161 /* make sure data list is not NULL: */

162 msg->data_list = g_list_append(NULL, g_strdup(""));

163

164 DEBUG(4) debugf("received %d lines of data (%d bytes)\n", line_cnt, data_size);

165 /* we get here after we succesfully received the mail data */

166

167 msg->data_size = data_size;

168 msg->received_time = time(NULL);

169

170 return AERR_OK;

171 }

172

173 accept_error

174 accept_message_prepare(message * msg, guint flags)

175 {

176 struct passwd *passwd = NULL;

177 GList *non_rcpt_list = NULL;

178 time_t rec_time = time(NULL);

179

180 DEBUG(5) debugf("accept_message_prepare()\n");

181

182 /* create unique message id */

183 msg->uid = g_malloc(14);

184

185 string_base62(msg->uid, rec_time, 6);

186 msg->uid[6] = '-';

187 string_base62(&(msg->uid[7]), getpid(), 3);

188 msg->uid[10] = '-';

189 string_base62(&(msg->uid[11]), msg->transfer_id, 2);

190 msg->uid[13] = 0;

191

192 /* if local, get password entry */

193 if (msg->received_host == NULL) {

194 passwd = g_memdup(getpwuid(geteuid()), sizeof(struct passwd));

195 msg->ident = g_strdup(passwd->pw_name);

196 }

197

198 /* set return path if local */

199 if (msg->return_path == NULL) {

200

201 if (msg->received_host == NULL) {

202 gchar *path = g_strdup_printf("<%s@%s>", passwd->pw_name, conf.host_name);

203 DEBUG(3) debugf("setting return_path for local accept: %s\n", path);

204 msg->return_path = create_address(path, TRUE);

205 g_free(path);

206 }

207 }

208

209 /* -t option */

210 if (flags & ACC_DEL_RCPTS) {

211 non_rcpt_list = msg->rcpt_list;

212 msg->rcpt_list = NULL;

213 }

214

215 /* scan headers */

216 {

217 gboolean has_id = FALSE;

218 gboolean has_date = FALSE;

219 gboolean has_sender = FALSE;

220 gboolean has_from = FALSE;

221 gboolean has_rcpt = FALSE;

222 gboolean has_to_or_cc = FALSE;

223 GList *hdr_node, *hdr_node_next;

224 header *hdr;

225

226 for (hdr_node = g_list_first(msg->hdr_list);

227 hdr_node != NULL; hdr_node = hdr_node_next) {

228 hdr_node_next = g_list_next(hdr_node);

229 hdr = ((header *) (hdr_node->data));

230 DEBUG(5) debugf("scanning headers: %s", hdr->header);

231 switch (hdr->id) {

232 case HEAD_MESSAGE_ID:

233 has_id = TRUE;

234 break;

235 case HEAD_DATE:

236 has_date = TRUE;

237 break;

238 case HEAD_FROM:

239 has_from = TRUE;

240 break;

241 case HEAD_SENDER:

242 has_sender = TRUE;

243 break;

244 case HEAD_TO:

245 case HEAD_CC:

246 case HEAD_BCC:

247 has_rcpt = TRUE;

248 if (flags & ACC_RCPT_FROM_HEAD) {

249 DEBUG(5) debugf("hdr->value = %s\n", hdr->value);

250 if (hdr->value) {

251 msg->rcpt_list = addr_list_append_rfc822(msg->rcpt_list, hdr->value, conf.host_name);

252 }

253 }

254 if ((flags & ACC_DEL_BCC) && (hdr->id == HEAD_BCC)) {

255 DEBUG(3) debugf("removing 'Bcc' header\n");

256 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);

257 g_list_free_1(hdr_node);

258 destroy_header(hdr);

259 } else

260 has_to_or_cc = TRUE;

261 break;

262 case HEAD_ENVELOPE_TO:

263 if (flags & ACC_SAVE_ENVELOPE_TO) {

264 DEBUG(3) debugf("creating 'X-Orig-Envelope-To' header\n");

265 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN, "X-Orig-Envelope-to: %s", hdr->value));

266 }

267 DEBUG(3) debugf("removing 'Envelope-To' header\n");

268 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);

269 g_list_free_1(hdr_node);

270 destroy_header(hdr);

271 break;

272 case HEAD_RETURN_PATH:

273 if (flags & ACC_MAIL_FROM_HEAD) {

274 /* usually POP3 accept */

275 msg->return_path = create_address_qualified(hdr->value, TRUE, msg->received_host);

276 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));

277 }

278 DEBUG(3) debugf("removing 'Return-Path' header\n");

279 msg->hdr_list = g_list_remove_link(msg->hdr_list, hdr_node);

280 g_list_free_1(hdr_node);

281 destroy_header(hdr);

282 break;

283 default:

284 break; /* make compiler happy */

285 }

286 }

287

288 if (msg->return_path == NULL) {

289 /* this can happen for pop3 accept only and if no Return-path: header was given */

290 GList *hdr_list;

291 header *hdr;

292

293 DEBUG(3) debugf("return_path == NULL\n");

294

295 hdr_list = find_header(msg->hdr_list, HEAD_SENDER, NULL);

296 if (!hdr_list)

297 hdr_list = find_header(msg->hdr_list, HEAD_FROM, NULL);

298 if (hdr_list) {

299 gchar *addr;

300 hdr = (header *) (g_list_first(hdr_list)->data);

301

302 DEBUG(5) debugf("hdr->value = '%s'\n", hdr->value);

303

304 addr = g_strdup(hdr->value);

305 g_strchomp(addr);

306

307 if ((msg->return_path = create_address_qualified(addr, FALSE, msg->received_host)) != NULL) {

308 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));

309 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,

310 "X-Warning: return path set from %s address\n",

311 hdr->id == HEAD_SENDER ? "Sender:" : "From:"));

312 }

313 g_free(addr);

314 }

315 if (msg->return_path == NULL) { /* no Sender: or From: or create_address_qualified failed */

316 msg->return_path = create_address_qualified("postmaster", TRUE, conf.host_name);

317 DEBUG(3) debugf("setting return_path to %s\n", addr_string(msg->return_path));

318 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_UNKNOWN,

319 "X-Warning: real return path is unkown\n"));

320 }

321 }

322

323 if (flags & ACC_DEL_RCPTS) {

324 GList *rcpt_node;

325 foreach(non_rcpt_list, rcpt_node) {

326 address *rcpt = (address *) (rcpt_node->data);

327 GList *node;

328 if ((node = g_list_find_custom(msg->rcpt_list, rcpt, _g_list_addr_isequal))) {

329 DEBUG(3) debugf("removing rcpt address %s\n", addr_string(node->data));

330 msg->rcpt_list = g_list_remove_link(msg->rcpt_list, node);

331 destroy_address((address *) (node->data));

332 g_list_free_1(node);

333 }

334 }

335 }

336

337 /* here we should have our recipients, fail if not: */

338 if (msg->rcpt_list == NULL) {

339 logwrite(LOG_WARNING, "no recipients found in message\n");

340 return AERR_NORCPT;

341 }

342

343 if (!(has_sender || has_from)) {

344 DEBUG(3) debugf("adding 'From' header\n");

345 msg->hdr_list = g_list_append(msg->hdr_list,

346 msg->full_sender_name

347 ?

348 create_header(HEAD_FROM, "From: \"%s\" <%s@%s>\n", msg->full_sender_name,

349 msg->return_path->local_part, msg->return_path->domain)

350 :

351 create_header(HEAD_FROM, "From: <%s@%s>\n",

352 msg->return_path->local_part, msg->return_path->domain)

353 );

354 }

355 if ((flags & ACC_HEAD_FROM_RCPT) && !has_rcpt) {

356 GList *node;

357 DEBUG(3) debugf("adding 'To' header(s)\n");

358 for (node = g_list_first(msg->rcpt_list); node; node = g_list_next(node)) {

359 msg->hdr_list = g_list_append(msg->hdr_list,

360 create_header(HEAD_TO, "To: %s\n", addr_string(msg-> return_path)));

361 }

362 }

363 if ((flags & ACC_DEL_BCC) && !has_to_or_cc) {

364 /* Bcc headers have been removed, and there are no remaining rcpt headers */

365 DEBUG(3) debugf("adding empty 'Bcc:' header\n");

366 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_BCC, "Bcc:\n"));

367 }

368 if (!has_date) {

369 DEBUG(3) debugf("adding 'Date:' header\n");

370 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_DATE, "Date: %s\n", rec_timestamp()));

371 }

372 if (!has_id) {

373 DEBUG(3) debugf("adding 'Message-ID:' header\n");

374 msg->hdr_list = g_list_append(msg->hdr_list,

375 create_header(HEAD_MESSAGE_ID, "Message-ID: <%s@%s>\n", msg->uid, conf.host_name));

376 }

377 }

378

379 /* Received header: */

380 /* At this point because we have to know the rcpts for the 'for' part */

381 if (!(flags & ACC_NO_RECVD_HDR)) {

382 gchar *for_string = NULL;

383 header *hdr = NULL;

384

385 DEBUG(3) debugf("adding 'Received:' header\n");

386

387 if (g_list_length(msg->rcpt_list) == 1) {

388 address *addr = (address *) (g_list_first(msg->rcpt_list)->data);

389 for_string = g_strdup_printf(" for %s", addr_string(addr));

390 }

391

392 if (msg->received_host == NULL) {

393 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",

394 passwd->pw_name, conf.host_name, prot_names[msg->received_prot],

395 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());

396 } else {

397 #ifdef ENABLE_IDENT

398 DEBUG(5) debugf("adding 'Received:' header (5)\n");

399 hdr = create_header(HEAD_RECEIVED, "Received: from %s (ident=%s) by %s with %s (%s %s) id %s%s; %s\n",

400 msg->received_host, msg->ident ? msg->ident : "unknown", conf.host_name,

401 prot_names[msg->received_prot], PACKAGE, VERSION, msg->uid, for_string ? for_string : "",

402 rec_timestamp());

403 #else

404 hdr = create_header(HEAD_RECEIVED, "Received: from %s by %s with %s (%s %s) id %s%s; %s\n",

405 msg->received_host, conf.host_name, prot_names[msg->received_prot],

406 PACKAGE, VERSION, msg->uid, for_string ? for_string : "", rec_timestamp());

407 #endif

408 }

409 header_fold(hdr);

410 msg->hdr_list = g_list_prepend(msg->hdr_list, hdr);

411

412 if (for_string)

413 g_free(for_string);

414 }

415

416 /* write message to spool: */

417 /* accept is no longer responsible for this

418 if (!spool_write(msg, TRUE))

419 return AERR_NOSPOOL;

420 */

421 return AERR_OK;

422 }

423

424 accept_error

425 accept_message(FILE * in, message * msg, guint flags)

426 {

427 accept_error err;

428

429 err = accept_message_stream(in, msg, flags);

430 if (err == AERR_OK)

431 err = accept_message_prepare(msg, flags);

432

433 return err;

434 }