masqmail-0.2: 087e99c7702a src/accept.c

masqmail-0.2

view src/accept.c @ 174:087e99c7702a

added my copyright to files I worked on

author	meillo@marmaro.de
date	Fri, 23 Jul 2010 10:16:53 +0200
parents	cd59a5b4d3dd
children	ec3fe72a3e99

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 "pop3",

29 "apop",

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

31 };

33 static gchar*

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

35 {

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

37 gchar *p = res + len;

38 *p = '\0';

39 while (p > res) {

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

41 value /= 62;

42 }

43 return res;

44 }

46 static gint

47 _g_list_addr_isequal(gconstpointer a, gconstpointer b)

48 {

49 address *addr1 = (address *) a;

50 address *addr2 = (address *) b;

51 int ret;

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

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

55 else

56 return ret;

57 }

59 /* accept message from anywhere.

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

62 The -t option:

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

64 headers to the recipients list.

65 The ACC_DEL_RCPTS flag makes only sense if the ACC_RCPT_FROM_HEAD

66 flag is given too. With ACC_DEL_RCPTS the recipients given on the

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

68 */

70 accept_error

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

72 {

73 gchar *line, *line1;

74 int line_size = MAX_DATALINE;

75 gboolean in_headers = TRUE;

76 header *hdr = NULL;

77 gint line_cnt = 0, data_size = 0;

79 line = g_malloc(line_size);

80 line[0] = '\0';

82 while (TRUE) {

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

85 line1 = line;

87 if ((line[0] == '.') && (!(flags & ACC_DOT_IGNORE))) {

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

89 g_free(line);

90 break;

91 }

92 line1++;

93 }

95 if (len <= 0) {

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

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

98 gint len1 = strlen(line1);

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

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

101 line1[len1] = '\n';

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

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

104 data_size += strlen(line1);

105 line_cnt++;

106 }

107 }

108 break;

109 } else {

110 g_free(line);

111 if (len == -1) {

112 return AERR_EOF;

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

114 /* should not happen any more */

115 return AERR_OVERFLOW;

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

117 return AERR_TIMEOUT;

118 } else {

119 /* does not happen */

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

121 return AERR_UNKNOWN;

122 }

123 }

124 } else {

125 if (in_headers) {

126

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

128 if (msg->hdr_list == NULL)

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

130 continue;

131

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

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

134 if (hdr) {

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

136 }

137

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

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

140 in_headers = FALSE;

141 } else {

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

143 if ((hdr = get_header(line1)))

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

145 else {

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

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

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

149 in_headers = FALSE;

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

151 }

152 }

153 } else {

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

155 data_size += strlen(line1);

156 line_cnt++;

157 }

158 }

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

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

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

162 data_size, conf.max_msg_size);

163 return AERR_SIZE;

164 }

165

166 }

167

168 if (msg->data_list != NULL)

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

170 else

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

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

173

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

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

176

177 msg->data_size = data_size;

178 msg->received_time = time(NULL);

179

180 return AERR_OK;

181 }

182

183 accept_error

184 accept_message_prepare(message * msg, guint flags)

185 {

186 struct passwd *passwd = NULL;

187 GList *non_rcpt_list = NULL;

188 time_t rec_time = time(NULL);

189

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

191

192 /* create unique message id */

193 msg->uid = g_malloc(14);

194

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

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

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

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

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

200 msg->uid[13] = 0;

201

202 /* if local, get password entry */

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

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

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

206 }

207

208 /* set return path if local */

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

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

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

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

213 g_free(path);

214 }

215

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

217 if (flags & ACC_DEL_RCPTS) {

218 non_rcpt_list = msg->rcpt_list;

219 msg->rcpt_list = NULL;

220 }

221

222 /* scan headers */

223 {

224 gboolean has_id = FALSE;

225 gboolean has_date = FALSE;

226 gboolean has_sender = FALSE;

227 gboolean has_from = FALSE;

228 gboolean has_to_or_cc = FALSE;

229 GList *hdr_node, *hdr_node_next;

230 header *hdr;

231

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

233 hdr_node != NULL; hdr_node = hdr_node_next) {

234 hdr_node_next = g_list_next(hdr_node);

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

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

237 switch (hdr->id) {

238 case HEAD_MESSAGE_ID:

239 has_id = TRUE;

240 break;

241 case HEAD_DATE:

242 has_date = TRUE;

243 break;

244 case HEAD_FROM:

245 has_from = TRUE;

246 break;

247 case HEAD_SENDER:

248 has_sender = TRUE;

249 break;

250 case HEAD_TO:

251 case HEAD_CC:

252 has_to_or_cc = TRUE;

253 /* fall through */

254 case HEAD_BCC:

255 if (flags & ACC_RCPT_FROM_HEAD) {

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

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

258 if (hdr->value) {

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

260 }

261 }

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

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

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

265 g_list_free_1(hdr_node);

266 destroy_header(hdr);

267 }

268 break;

269 case HEAD_ENVELOPE_TO:

270 if (flags & ACC_SAVE_ENVELOPE_TO) {

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

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

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

274 }

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

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

277 g_list_free_1(hdr_node);

278 destroy_header(hdr);

279 break;

280 case HEAD_RETURN_PATH:

281 if (flags & ACC_MAIL_FROM_HEAD) {

282 /* usually POP3 accept */

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

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

285 }

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

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

288 g_list_free_1(hdr_node);

289 destroy_header(hdr);

290 break;

291 default:

292 break; /* make compiler happy */

293 }

294 }

295

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

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

298 GList *hdr_list;

299 header *hdr;

300

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

302

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

304 if (!hdr_list)

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

306 if (hdr_list) {

307 gchar *addr;

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

309

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

311

312 addr = g_strdup(hdr->value);

313 g_strchomp(addr);

314

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

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

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

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

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

320 }

321 g_free(addr);

322 }

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

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

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

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

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

328 }

329 }

330

331 if (flags & ACC_DEL_RCPTS) {

332 /* remove the recipients given on the command line from the ones given in headers

333 -t option (see comment above) */

334 GList *rcpt_node;

335 foreach(non_rcpt_list, rcpt_node) {

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

337 GList *node;

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

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

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

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

342 g_list_free_1(node);

343 }

344 }

345 }

346

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

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

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

350 return AERR_NORCPT;

351 }

352

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

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

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

356 msg->full_sender_name

357 ?

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

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

360 :

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

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

363 );

364 }

365 if (!has_to_or_cc) {

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

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

368 }

369 if (!has_date) {

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

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

372 }

373 if (!has_id) {

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

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

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

377 }

378 }

379

380 /* Received header: */

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

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 /* received locally */

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

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

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

397 } else {

398 /* received from remote */

399 #ifdef ENABLE_IDENT

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

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

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

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

404 rec_timestamp());

405 #else

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

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

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

409 #endif

410 }

411 header_fold(hdr);

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

413

414 if (for_string)

415 g_free(for_string);

416

417 /* write message to spool: */

418 /* accept is no longer responsible for this

419 if (!spool_write(msg, TRUE))

420 return AERR_NOSPOOL;

421 */

422 return AERR_OK;

423 }

424

425 accept_error

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

427 {

428 accept_error err;

429

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

431 if (err == AERR_OK)

432 err = accept_message_prepare(msg, flags);

433

434 return err;

435 }