masqmail: 1405012509e3 src/accept.c

masqmail

view src/accept.c @ 275:1405012509e3

removed comment, see previous commit

author	markus schnalke <meillo@marmaro.de>
date	Fri, 03 Dec 2010 19:35:34 -0300
parents	0c44b239c7fe
children	1abc1faeb45d

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 "masqmail.h"

21 #include "readsock.h"

23 gchar *prot_names[] = {

24 "local",

25 "bsmtp",

26 "smtp",

27 "esmtp",

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

29 };

31 static gchar*

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

33 {

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

35 gchar *p = res + len;

36 *p = '\0';

37 while (p > res) {

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

39 value /= 62;

40 }

41 return res;

42 }

44 static gint

45 _g_list_addr_isequal(gconstpointer a, gconstpointer b)

46 {

47 address *addr1 = (address *) a;

48 address *addr2 = (address *) b;

49 int ret;

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

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

53 }

54 return ret;

55 }

57 /* accept message from anywhere.

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

60 The -t option:

61 The ACC_RCPT_FROM_HEAD flag adds the recipients found in To/Cc/Bcc

62 headers to the recipients list. The recipients given on the

63 command line are removed from the ones given in headers.

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_DOT_IGNORE))) {

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

85 g_free(line);

86 break;

87 }

88 line1++;

89 }

91 if ((len == -1) && (flags & (ACC_DOT_IGNORE | ACC_NODOT_RELAX))) {

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

93 gint len1 = strlen(line1);

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

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

96 line1[len1] = '\n';

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

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

99 data_size += strlen(line1);

100 line_cnt++;

101 }

102 }

103 break;

104

105 } else if (len == -1) {

106 g_free(line);

107 return AERR_EOF;

108

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

110 /* should not happen any more */

111 g_free(line);

112 return AERR_OVERFLOW;

113

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

115 g_free(line);

116 return AERR_TIMEOUT;

117

118 } else if (len <= 0) {

119 /* does not happen */

120 g_free(line);

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

122 return AERR_UNKNOWN;

123

124 }

125

126 if (in_headers) {

127

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

129 if (!msg->hdr_list && strncmp(line1, "From ", 5) == 0) {

130 continue;

131 }

132

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

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

135 if (hdr) {

136 hdr->header = g_strconcat(hdr->header, line1, NULL);

137 }

138

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

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

141 in_headers = FALSE;

142 } else {

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

144 if ((hdr = get_header(line1))) {

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

146 } else {

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

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

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

150 in_headers = FALSE;

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

152 }

153 }

154 } else {

155 /* message body */

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

157 data_size += strlen(line1);

158 line_cnt++;

159 }

160

161 if (conf.max_msg_size && (data_size > conf.max_msg_size)) {

162 DEBUG(4) debugf("accept_message_stream(): "

163 "received %d bytes (conf.max_msg_size=%d)\n",

164 data_size, conf.max_msg_size);

165 return AERR_SIZE;

166 }

167

168 }

169

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

171

172 if (!msg->data_list) {

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

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

175 }

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

177

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

179

180 msg->data_size = data_size;

181 msg->received_time = time(NULL);

182

183 return AERR_OK;

184 }

185

186 accept_error

187 accept_message_prepare(message * msg, guint flags)

188 {

189 struct passwd *passwd = NULL;

190 GList *non_rcpt_list = NULL;

191 time_t rec_time = time(NULL);

192

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

194

195 /* create unique message id */

196 msg->uid = g_malloc(14);

197

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

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

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

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

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

203 msg->uid[13] = 0;

204

205 /* if local, get password entry */

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

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

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

209 }

210

211 /* set return path if local */

212 if (msg->return_path == NULL && msg->received_host == NULL) {

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

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

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

216 g_free(path);

217 }

218

219 /* -t option (see comment above) */

220 if (flags & ACC_RCPT_FROM_HEAD) {

221 non_rcpt_list = msg->rcpt_list;

222 msg->rcpt_list = NULL;

223 }

224

225 /* scan headers */

226 {

227 gboolean has_id = FALSE;

228 gboolean has_date = FALSE;

229 gboolean has_sender = FALSE;

230 gboolean has_from = FALSE;

231 gboolean has_to_or_cc = FALSE;

232 GList *hdr_node, *hdr_node_next;

233 header *hdr;

234

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

236 hdr_node != NULL; hdr_node = hdr_node_next) {

237 hdr_node_next = g_list_next(hdr_node);

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

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

240 switch (hdr->id) {

241 case HEAD_MESSAGE_ID:

242 has_id = TRUE;

243 break;

244 case HEAD_DATE:

245 has_date = TRUE;

246 break;

247 case HEAD_FROM:

248 has_from = TRUE;

249 break;

250 case HEAD_SENDER:

251 has_sender = TRUE;

252 break;

253 case HEAD_TO:

254 case HEAD_CC:

255 has_to_or_cc = TRUE;

256 /* fall through */

257 case HEAD_BCC:

258 if (flags & ACC_RCPT_FROM_HEAD) {

259 /* -t option (see comment above) */

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

261 if (hdr->value) {

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

263 }

264 }

265 if (hdr->id == HEAD_BCC) {

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

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

268 g_list_free_1(hdr_node);

269 destroy_header(hdr);

270 }

271 break;

272 case HEAD_ENVELOPE_TO:

273 if (flags & ACC_SAVE_ENVELOPE_TO) {

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

275 msg->hdr_list = g_list_prepend(msg->hdr_list, create_header(HEAD_UNKNOWN,

276 "X-Orig-Envelope-to: %s", hdr->value));

277 }

278 DEBUG(3) debugf("removing 'Envelope-To' 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 case HEAD_RETURN_PATH:

284 if (flags & ACC_MAIL_FROM_HEAD) {

285 /* usually POP3 accept */

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

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

288 }

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

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

291 g_list_free_1(hdr_node);

292 destroy_header(hdr);

293 break;

294 default:

295 break; /* make compiler happy */

296 }

297 }

298

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

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

301 GList *hdr_list;

302 header *hdr;

303

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

305

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

307 if (!hdr_list)

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

309 if (hdr_list) {

310 gchar *addr;

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

312

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

314

315 addr = g_strdup(hdr->value);

316 g_strchomp(addr);

317

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

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

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

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

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

323 }

324 g_free(addr);

325 }

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

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

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

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

330 "X-Warning: real return path is unknown\n"));

331 }

332 }

333

334 if (flags & ACC_RCPT_FROM_HEAD) {

335 /* remove the recipients given on the command line

336 from the ones given in headers

337 -t option (see comment above) */

338 GList *rcpt_node;

339 foreach(non_rcpt_list, rcpt_node) {

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

341 GList *node;

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

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

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

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

346 g_list_free_1(node);

347 }

348 }

349 }

350

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

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

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

354 return AERR_NORCPT;

355 }

356

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

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

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

360 msg->full_sender_name

361 ?

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

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

364 :

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

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

367 );

368 }

369 if (!has_to_or_cc) {

370 DEBUG(3) debugf("no To: or Cc: header, hence adding `To: undisclosed recipients:;'\n");

371 msg->hdr_list = g_list_append(msg->hdr_list, create_header(HEAD_TO, "To: undisclosed-recipients:;\n"));

372 }

373 if (!has_date) {

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

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

376 }

377 if (!has_id) {

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

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

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

381 }

382 }

383

384 /* Received header: */

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

386 gchar *for_string = NULL;

387 header *hdr = NULL;

388

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

390

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

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

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

394 }

395

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

397 /* received locally */

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

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

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

401 } else {

402 /* received from remote */

403 #ifdef ENABLE_IDENT

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

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

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

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

408 rec_timestamp());

409 #else

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

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

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

413 #endif

414 }

415 header_fold(hdr);

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

417

418 if (for_string)

419 g_free(for_string);

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

434 return err;

435 }